Tuesday, December 31, 2019
Rhetorical Analysis Of Ronald Reagans Red Glare - 1180 Words
Reaganââ¬â¢s Red Glare During a time of terrifying darkness, a time of rising hostility, there stood two giants, menacingly staring down the other. One giant in the eastern hemisphere, named the USSR, and the other giant in the western hemisphere, the United States of America. As the two stared each other down, reaching closer and closer to war, a man stood up; determined to make the world a better place. This man spoke out against the USSR and the vices within the United States. This man was Ronald Reagan, the leader of the United States. With the fervor and duty of a leader, he climbed on top of the American giant, armed with diligence and the will of his people. On top, he began his speech against the Soviet Union, driving passionâ⬠¦show more contentâ⬠¦By allowing himself to speak from the heart, the mundane details in his speech turn into key points of his speech. This aspect of his rhetoric enhanced his words, acting as a shimmering light for the distraught and the ho peless acting similarly as moths to a flame. His usage of pathos diffused through the crowds, allowing them to pick up his passion and his fervor. Reagan even directly uses emotion to rile up the crowd by attacking the notion of discouragement, telling the people that they are actively contributing towards a new spiritual awakening. (ââ¬Å"American Rhetoric: Ronald Reaganâ⬠). His rhetoric definitely utilized emotion to great extents, but his speech didnââ¬â¢t total out to emotion. He had to pierce through hearts of stone as well, leading towards his use of logos. For the pragmatic, the thoughts of imminent nuclear warfare terrified any rational being, whether Soviet or American. Reagan had to find a way to reason his way with not visions of hope, but with answers. He began by starting off with homeland affairs, discussing issues such as infanticide and abortions, stating statistics. For instance, he spoke against abortions claiming that they took the lives of ââ¬Å"one and a half millionâ⬠, adding on that his legislation will end such a practice. (ââ¬Å"American Rhetoric: Ronald Reaganâ⬠) Outside of abortion, Reagan also champions the fact that he himself benefits the country by protecting handicapped and
Monday, December 23, 2019
Can the Concept of ââ¬ËEarlyââ¬â¢ and ââ¬ËLateââ¬â¢ Industrialization...
Can the concept of ââ¬Ëearlyââ¬â¢ and ââ¬Ëlateââ¬â¢ industrialization explain the key institutional and organizational characteristics of national business systems, and do they have any bearing on long-term national competitiveness? Introduction The concept of industrialization has been used among different nations and regions, while many countries have carried out their own industrialization progress during the past several decades, which stimulates the development of organizations and better corporate performance. There are different kinds of national business systems with their distinctive characteristics varying among countries. Then ââ¬Ëearlyââ¬â¢ and ââ¬Ëlateââ¬â¢ industrialization is applied to describe two main types of national businesses thatâ⬠¦show more contentâ⬠¦He pointed out that different economic levels have their own requirements and they may not follow the same process of industrialization. Moreover, he raised the most influential theory related to late industrialization that the economically backward states may have rapider growth rate as they are late comers, and the national development process relied on the degree of economic backwardness. That is to say the more backward a country, the faster it will advance (ibid). Financial system and Business groups There are several aspects of early and late industrialization that bring about institutional and organizational characteristics differences among countries. The various financial systems and business groups is one of the key factors which affect the actual economic behavior. According to Hutton (1995), the financial systems in the UK and US are stock market oriented, which require high returns relatively. The major organizations are controlled by stock-holders in the US. These financial institutions operate their business while trading shares in an intense competitive stock market, which makes them to adjust and react quickly to changing market conditions. 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Sunday, December 15, 2019
What are the arguments for and against the state taking on responsibility for social welfare Free Essays
The different arguments for and against the state taking on responsibility for social welfare have been powerfully put across by people of opposing political persuasions in Britain over the last 60 years. In this essay, therefore, I intend to use Britainââ¬â¢s welfare state to exemplify arguments for and against the state taking primary responsibility for social welfare. The welfare state in Britain was introduced in 1945 by the newly elected Labour government. We will write a custom essay sample on What are the arguments for and against the state taking on responsibility for social welfare? or any similar topic only for you Order Now Although this was the first comprehensive attempt at creating a functional welfare state it is important to note that it was not an entirely new policy. In fact, we can trace back to 1601 to find an early attempt at implementing a state welfare provision ââ¬â the Poor Law. The theory behind this legislation was that the poor were to be categorized into the deserving (ââ¬Å"the impotent poorâ⬠) and the undeserving (ââ¬Å"the persistent idlersâ⬠). There were many obvious flaws in the methodology and logic in the implementation of the Poor Law but it must be recognised that this was an early attempt at providing a social welfare system. This demonstrates that for hundreds of years a case has been made for some measure of state social welfare provision. It is also vital not to underestimate the impact the studies carried out by social researchers such as Rowntree (1901) and Booth (1902) had on the forming and implementation of a social welfare provision in 1945. The Beveridge report (1942) pointed to the ââ¬Å"chaoticâ⬠and ââ¬Å"piecemealâ⬠introduction of changes into the system and stated the need for a new and more comprehensive system to be installed. Beveridgeââ¬â¢s report was underpinned by the need to cure the ââ¬Å"five giantsâ⬠. Beveridge identified these ââ¬Å"five giantsâ⬠as: Idleness, Squalor, Ignorance, Want and Disease. He identified the need for a state commitment to securing full employment to combat idleness. He argued public housing must be available for all citizens to rent. To cure ignorance he suggested the need for a free education system for anyone up to the age of 15. He suggested the implementation of a national health service to help cure disease. Finally, Beveridge argued that National Insurance benefits should be handed out to all in need. The welfare state had to be introduced in a series of acts, notably the National Health Service Act (1946), the Education Act (1944), the Family Allowance Act (1945). At the time there was much reluctance towards carrying out all of the proposals. The arguments against this degree of state provision stemmed from concerns about cost and the fundamental principles of welfare (e. g. how decisions are made and who should be entitled to receive welfare). Because of the reluctance that grew from the fact that these arguments were never resolved. Beveridgeââ¬â¢s suggestions were never fully implemented but his ideas still clearly formed the inspiration for the future of welfare reform. One of the main criticisms of Beveridgeââ¬â¢s proposals and of the concept of a welfare state is that a number of important assumptions have to be made for it to function successfully. For example, within the report, Beveridge makes the assumption that married women would be full time housewives and that for most of their lives women would not be employed. Therefore, married women would only receive benefits through men, thus, creating a culture which encourages womenââ¬â¢s reliance on men. Because of this feminists have argued that the British welfare state relied on a ââ¬Å"familial ideologyâ⬠and treated women as second class citizens. This example of the role of women within the welfare state illustrates the point that any welfare system is not neutral that is based on ideological assumptions. These assumptions will influence the way that different members of the public will respond to state provision of welfare. Another example of these ideological assumptions would be the 17th century belief that only the ââ¬Å"impotent poorâ⬠deserve state welfare. The economics of Britainââ¬â¢s state welfare system have also come under a lot of criticism. These critics argue there are some fundamental flaws with the economic ideology underpinning the system. Firstly, for the welfare state to operate properly and fairly their must be nearly full employment in the country where it is based as, in theory, this will maximize tax revenue and minimize unemployment benefits. This system worked relatively effectively until the early 1970ââ¬â¢s. However, due to the relative decline of the UK economy, Britain suffered an economic crisis and unemployment started rising rapidly. Since then mass unemployment has been a serious problem within British society. Critics suggest that this is proof of how dependent a welfare state is on a prosperous economy. Basically this meant that the welfare state was reliant on capitalism ââ¬â rather than contributing to the undermining or softening of its most brutal aspects . The New Right have made strong arguments against state welfare provision. The 1979 election brought into power a conservative government that had a new and radical approach to public expenditure and the welfare state as a whole. Probably the most notable change in policy brought in by the New Right was the end of the commitment to full employment that previous governments had encouraged. The New Right believed in a ââ¬Å"natural level of employmentâ⬠. They felt that this ââ¬Å"natural level of employmentâ⬠was being undermined by wages being too high due to the actions of trade unions. Therefore, they argued that the market would solve unemployment by creating downward pressure on wages. Because of this, the differential between wages and benefits was increased by creating downward pressure on benefit levels and therefore welfare expenditure. However, despite this right wing shift in political thinking, there was no major change in welfare expenditure until the late 1980ââ¬â¢s. The year 1988 was an important one in terms of implications for the welfare state as it represented a far more radical application of New Right thinking towards the welfare state. Firstly, the New Right introduced a shift from the previous system of universal provision towards a system based more upon selective provision. For example, some of the benefits that were previously available to everyone (universal) became only available to some via a ââ¬Å"means testâ⬠(selective). This was a big move that completely contradicted the universal method employed by previous more left wing governments. Another change made by the New Right was the introduction of privatization and marketization. An example of this is the case of the sale of council houses. The public housing stock was privatized and sold off in an attempt to create a market for the council housing which had originally in Beveridgeââ¬â¢s thinking, been intended for public ownership and private rent. Another major shift made by the Conservative government was towards community care. There was a trend for mentally ill, elderly and disabled people to be moved from institutions to care in the community. However, what this basically meant was that rather than institutional care the responsibility was shifted onto the family. It is also very important to note that care in the community was considerably cheaper for the state to maintain than institutional care. The New Right also consciously made an effort to change the publicââ¬â¢s perception of welfare ââ¬â shifting away from the view that the state is the only provider of welfare. The responsibility of the state was reduced through the encouragement of private provision and by emphasizing the importance of the charitable and voluntary sector. This is one of the central strands of the argument against state welfare provision. At this juncture it is important to consider the effect privatization has had on society and the welfare state. Since the New Right introduced new policy pertaining to welfare in 1979 there have been a number of examples of the UK government seeking to encourage private provision of welfare. People have been encouraged to take out private insurance plans for their welfare needs and the number of people covered by private health insurance rose from 2. million to 5. 2 million between 1976 and 1986 (Julian Le Grand, 1990). In the mid 1980ââ¬â¢s the Conservative government tried to shift sickness insurance and pension insurance into the private sector also. These plans, however, never came to fruition owing to major criticism and insurance companies expressing a reluctance to take up policies for all employees Hutton (1996) strongly criticizes the New Rights welfare expenditure policy. He argues against the belief that public expenditure should be reduced during troubled times for the economy. Hutton believes that the cuts are spurred by political ideology rather then by economic need. In Huttonââ¬â¢s words ââ¬Å"apart from Iceland, Britain runs the meanest, tightest, lowest-cost social security system in the worldâ⬠. Hutton alleges that the twenty-first century will see a large rise in the amount of tax revenue available to fund welfare payments. The voluntary sector must also be discussed when considering arguments for and against the state taking on responsibility for the welfare state. Organizations such as Barnados, the Salvation Army and the NSPCC provide voluntary care. They serve a different role to statutory bodies set up by Parliament, but the views of these voluntary providers are respected and need to be taken into account as well. These organizations tend to have specialized expertise and experience in certain areas and the government can benefit from this knowledge. A major bonus of voluntary provision is that they are often very cost effective as unpaid volunteers are often used. It is estimated by Knapp (1989) that the total amount of public-sector support for voluntary provision between 1983 and 1986 was i3151 million. However, there are also inherent weaknesses in voluntary provision. The biggest and most blatant problem stems from the nature of voluntary work as it cannot be guaranteed. Critics also point to the fact that voluntary work may be unequally provided across the country. The service can therefore be inconsistent and the advice from the voluntary sector to government might differ depending on the region. It is also suggested that due to financial restrictions the voluntary sector will never be anything more than a secondary level service that relies on the state or private sector provision. Social security benefits are the most redistributive aspect of the welfare state as they distribute income to the poorest people in the country. A point in favour of a social welfare system, from a socialist or social democratic perspective, is that the social security benefits can be used to redistribute wealth to make society economically fairer by heavily taxing the rich and giving it to the poorest people in society. On the other hand, opponents see this as a Robin Hood aspect of state social welfare which demotivates both the richest and the poorest people in the country ââ¬â encouraging idleness (one of the ââ¬Å"five giantsâ⬠beveridge was trying to eradicate) amongst the poor and encouraging the rich to leave the country. The New Right when in power, therefore, cut back on the redistributive aspects of welfare provision. The one-off grant system that was previously in effect was replaced in the 1986 and 1988 security acts and 16 to 18 year olds entitlement to income support was revoked. In current political debates the Conservative party, now in opposition frequently accuse the Labour party of redistributing wealth from the rich to the poor via ââ¬Å"underhandâ⬠or ââ¬Å"stealthyâ⬠methods. This is an indication that the argument about the extent to which the state should take responsibility for social welfare remains highly contested. Where you stand on this issue is fundamental to your political beliefs and how you will vote. How to cite What are the arguments for and against the state taking on responsibility for social welfare?, Essays
Friday, December 6, 2019
International Mental Health Examination
Question: Discuss about the International Mental Health Examination. Answer: Introduction: Thought form refers to the verbal record of how and not what the patient thinks about. In a normal situation, the thought form is supposed to be goal directed and logical (Martin, 2012). On the other hand, thought content is what the patient thinks about with minimal emphasis on the process or form (Martin, 2012). To interpret Annabelles thought disturbance, we have to briefly record an extract of her conversation so that we can understand the way her thoughts are produced. Moreover, it helps us understand the way she associates one subject with another in the conversation (Faber, 2011). For instance, she does not associate well the responses as she says the sores are everywhere, even under her skin, then she adds that everyone is falling, a statement that totally disqualifies her thought form (Emedicine.medscape.com, 2016). Thus, it can be referred to as a tangentiality in thought form because her responses are off the topic and her answers do not correspond with the asked questions (Faber, 2011). The thought content can be a basis of determination of the disturbance of Annabelles feelings (Faber, 2011). First, it is imperative to delineate certain features by asking specific questions. For instance, you may inquire why she is brought to the hospital or what she is seeing and feeling. In addition to specific questions, a reality testing assessment can be effective to look for more psychotic symptoms like hallucinations and delusions (Faber, 2011). Clearly, Annabelle has delusions and hallucinations because she believes that people are falling and also hears some sounds, screams and holds her ears after looking at the ceiling. Additionally, she converses with children that the nurses and the guard cannot see. In summary, Annabelle has tangentiality in her thought form. Moreover, she has hallucinations and delusions in the content of her thoughts. Perception is the identification, interpretation and organisation of information that is sensory so that one can understand and represent the environment (Martin, 2012). Furthermore, it can be defined as a set of subconscious cognitive processes of the brain that detects, interprets, relates and searches cognitive information in the brain. Thus, it mainly relates to the nervous system (Martin, 2012). The major disturbances in perception that can be observed are hallucinations and delusions. The interpretation of the senses is based on asking questions and observing the behaviour and movements of the patient. First off, we can ask her if she has some powers so that we can determine delusions of grandeur, reference or persecution. Annabelle believes that children are falling. Moreover, she is determined to ask for forgiveness from the nurse. She has auditory hallucination because she asks the nurse to shut up as if there is someone that she is listening to (Nordgaard and Parnas, 2012). An understanding of Annabelles sensory misperceptions can help the assessors to be keen on specific areas so that the characteristics are determined. For instance, the nurse may ask her to describe the nature of the things that she is seeing or feeling. This way, we may classify her delusions and hallucinations (Nordgaard and Parnas, 2012). Because she has auditory hallucinations, I may ask further questions. For example, when do the voices come? Are they clear, loud or subdued? Do you recognise the sources? Are they unpleasant or they are just good? And many others. Delusions would also attract questions like the sources and the reasons why she believes so. The further probe helps us interpret the sensory changes that Annabelle is having and thus propel us closer to the right diagnosis and interventions(Emedicine.medscape.com, 2016). Mood refers to the general state of emotions from the clients subjective point of view, and involves the feelings that are present during the examination time and a few days or hours preceding it. Additionally, it is assessed by a direct questioning of the patient and recording a verbatim answer (Thompson, 2016). On the other hand, affect is the objective examination of the immediate expression of emotions that is flows with the interview (Thompson, 2016). Annabelles mood is a mixture of fright and anxiety. In terror, she looks at the ceiling and then reverts to smiles and giggles after a short while. This mood is not stable and changes over time. When the other two nurses and a guard enter the room, Annabelle looks at the ceiling then later begins to sob in despair, in a mood that is sad after telling them that the children have been hurt. Moreover, her speech describes her mood (Crighton, 2011). It is pressured, loud and rapid. Here, it describes an anxious mood (Cummings, 2014). The qualitative description of Annabelles affect is that it is elated, suspicious and aloof. It can also be described as fearful and anxious. Furthermore, she exhibits a full range of emotions according to the expression of the feelings outwardly. For example, she sobs when depressed about the children and giggles when thinking of a good thing. Her emotional reactions change quickly and are somehow labile because of the time taken for tears to come out. Again, her affect is appropriate and compatible to the ideas, the thought content and the motor activities that she exhibits (Hooper, 2014). Also, it is consistent with the mood that she has. Therefore, the domain of the appropriateness to the situation and content is confirmed as far as affect is concerned. Thus, Annabelles mood and affect are congruent with her condition and its expression. Annabelles general appearance is not as expected of a young adult especially a lady who has been in college. She has a jeans that is dirty and a t-shirt. She walks barefooted. This is an indication of the inability to take care of herself. The hair that is decorated in blue and yellow is matted and unkempt. Moreover, it shows how careless she has become lately due to her mental condition (Varcarolis, Halter and Varcarolis, 2010). The dressing is not appropriate for her considering that she is 22 years old. Again, she appears restless, bizarre, and tense in her posture. Moreover, she rarely takes a sit unless her mother convinces her. She wrings her hands as she paces around the corridors. Her facial expression is fearful and elated, as evidenced by the refusal to follow a nurse but just the mother. Furthermore, she has an increased psychomotor activity (Australian College of Mental Health Nursing 41st International Mental Health Nursing Conference - Mental Health Nurses: shifting cul ture, leading change, 2015). Her actions are also spontaneous because she just giggles and then sobs after a few minutes. Again, she quickly tells the nurse that it is not in her veins. Her motor activities are also appropriate considering that she moves around and wrings her hands. However, there are no tics present (Varcarolis, Halter and Varcarolis, 2010). Annabelles behaviours are bizarre. First, she is not oriented to time, place and person. Additionally, she repeatedly wrings her hands. Her gaze and manner are evidence of fear and intrigue. Again, there is sudden show of happiness through light laughter and then she sobs after staring at the ceiling. Other evident behaviours are delusions and hallucinations. Here, she hears sounds that even prompt her to guard her hears. She also believes that children are hurt and people may be falling. These behaviours are generally described as being bizarre (Varcarolis, Halter and Varcarolis, 2010). References Australian College of Mental Health Nursing 41st International Mental Health Nursing Conference - Mental Health Nurses: shifting culture, leading change. (2015).International Journal of Mental Health Nursing, 24, pp.1-49. Crighton, D. (2011). Risk assessment: predicting violence.Evidence-Based Mental Health, 14(3), pp.59-61. Cummings, J. (2014). The one-minute mental status examination.Neurology, 62(4), pp.534-535. Emedicine.medscape.com. (2016).History and Mental Status Examination: Overview, Patient History, Mental Status Examination. [online] Available at: https://emedicine.medscape.com/article/293402-overview [Accessed 4 Jan. 2016]. Faber, R. (2011). The Neuropsychiatric Mental Status Examination.Seminars in Neurology, 29(03), pp.185-193. Hooper, L. (2014). Mental Health Services in Primary Care: Implications for Clinical Mental Health Counselors and Other Mental Health Providers.Journal of Mental Health Counseling, 36(2), pp.95-98. Martin, D. (2012).The Mental Status Examination. [online] Ncbi.nlm.nih.gov. Available at: https://www.ncbi.nlm.nih.gov/books/NBK320/ [Accessed 4 Jan. 2016]. Nordgaard, l. and Parnas, J. (2012). Poster #71 Reliability Of The Assessment Of Subjective Experience And Of Mental Status.Schizophrenia Research, 136, p.S211. Thompson, J. (2016).A Practical Guide to Clinical Medicine. [online] Meded.ucsd.edu. Available at: https://meded.ucsd.edu/clinicalmed/mental.htm [Accessed 4 Jan. 2016]. Varcarolis, E., Halter, M. and Varcarolis, E. (2010).Foundations of psychiatric mental health nursing. 1st ed. St. Louis, Mo.: Saunders/Elsevier.
Friday, November 29, 2019
Accounting Opinion About Cash Discounts and Trade Discounts free essay sample
Year end: Mr. Williams 4 weeks Accounting v IFRS v US GAAP AASB IFRS for SME / Differential Reporting Standards Auditing Ethics Other (specify): 30 April, 2012 30 June, 2012 Prepared for (name of supervisor): Time spent on this opinion: What type of opinion (select options)? Accounting Standards applied: Query or issue: Whether the debit-balance account ââ¬Å"Cash Discountsâ⬠in the Statement of Comprehensive Income should be treated the same way as the ââ¬Å"Trade Discountsâ⬠account. Background and pertinent facts: Trade discount is allowed by the supplier of the goods to the purchaser when he buys from the supplier in bulk quantities. The purchaser is accountable for the invoice price which is the list price less the trade discount. Whereas, cash discount (also known as sales discount) is a decrease granted by supplier from the invoice price of the goods in order to encourage prompt payment. Authoritative Guidance and Research: AASB 101 Presentation of Financial Statements IAS 18 Revenue (IAS 18. We will write a custom essay sample on Accounting Opinion About Cash Discounts and Trade Discounts or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page 0) http://www. e-conomic. co. uk/accountingsystem/glossary/cash-discount http://www. letslearnfinance. com/difference-between-cash-and-trade-discount. html http://accountingexplained. com/financial/receivables/cash-discount-on-sales http://basiccollegeaccounting. com/2008/08/summary-of-difference-between-cash-discount-and-tr ade-discount/ Discussion and Analysis: Trade discount is given before the exchange happens; therefore, the amount recorded as sales revenue is the invoice price. Hence, there is no entry in the books of the account. Sales should be recorded after the deduction of such trade discounts. Unlike trade discount, cash discount is allowed on the payment of money after the invoice is made by the supplier; therefore, the cash discount is not shown on the invoice. In order to indicate the difference of amount between the sales revenue and the cash received, a cash discount account should be opened on the ledger. There are two methods of accounting for sales that offer cash discounts: the gross method and the net method. Once one method is chosen, it would be used to record all sales according to this method. The gross method records sales and Accounts Receivable at their gross amount and the discounts are recorded only when they are taken. The following journal entries should be recorded for the sale and for the full invoice amount payment: Dr. Accounts Receivable Cr. Sales Dr. Cash Dr. Sales Discounts Cr. Accounts Receivable IAS 18 Revenue requires cash discounts to be treated as reductions in revenue; thus, this special Sales Discounts account should be subtracted from Sales to calculate net sale. The net method puts forward a special revenue account Sales Discounts Forfeited. At the time of sale, sales and receivables are recorded net of possible discounts: Net Price = Gross Price ? Potential Cash Discount Thus, the journal entry at the time of sale is like: Dr. Accounts Receivable (Net Price) Cr. Sales (Net Price) If the payment is received within the time that was entitled on the invoice and the discounts are taken by the purchaser, it should be recorded as: Dr. Cash (Net Price) Cr. Accounts Receivable (Net Price) If the discounts are not taken, the amount is debited to Account Receivable and credited to Sales Discounts Forfeited which is calculated into an ââ¬Å"other revenueâ⬠account that appears on the Income Statement. The journal entry should be recorded as: Dr. Cash (Gross Price)
Monday, November 25, 2019
Qualities of a Great President essays
Qualities of a Great President essays What are the qualities of presidential leadership? What makes a president a great leader? The presidents were great leaders because they knew how to guide and to inspire the American People. The great presidents had leadership qualities such as possessing persistence like Lincoln, having resilience through education like Truman, demanding excellence like Kennedy, having sympathy or compassion like Lincoln, communicating and informing people like Reagan, being decisive like Grant the general, developing esteem like Franklin Roosevelt, having nerve or courage like Washington, practicing team leadership like Eisenhower, and finally sharing a vision like Thomas Jefferson. All these great presidents had these qualities as leaders that have transformed vision into reality. A quality most commonly associated with the president is leadership. A president must be able to lead the country. The president who comes to mind is Abraham Lincoln. Abraham Lincoln was a great man. He was honest, humble, and most of all: a great leader. He led in his early political days as well as leading the United States through the toughest time in our nations history. Lincoln issued the Emancipation Proclamation, which was extremely controversial; however, Lincoln held his ground, as all great leaders must. He stood up for what he believed in. He believed in the Constitution, the Bible, and the idea that all men are created equal. For a president to be successful, he needs to be ambitious. Also, the most successful presidents tend to be hard working and persistent. Presidents who succeed set ambitious goals for themselves and move heaven and earth to meet them. Lyndon B. Johnson was a very hard-working and ambitious president. Congress passed his proposals for increased federal aid to education, a cut in excise taxes, stronger safety measures for automobiles, and the establishment of two new executive departments-the Department of Housing and Urban D...
Thursday, November 21, 2019
Globalization revisited Essay Example | Topics and Well Written Essays - 250 words
Globalization revisited - Essay Example This is valuable as concepts for democracy and equality are espoused influencing leaders of other countries who incorporate them into their own governments. The more educated people spread their elevated ideas to others, the more the society becomes as a whole. Over time, this has and will continue to create a more globalized world. The somewhat less beneficial effects are initiated by big business. They hope to reach as many markets as possible to increase their profits. While the youth may enjoy these modern developments there is a great deal to be said about preserving a countries rich national culture. These elements also lead to a more globalized world but at what cost. Coca Cola sold in parts of Africa and China, Disneyland and such other American things may not necessarily contribute to the culture but rather direct every nation to be as the United States is. Is this really beneficial? Perhaps the US would benefit more by learning from other cultures, rich in tradition and values rather than being so profit driven. This leads to manââ¬â¢s lust for power. Imperialism started 500 years ago with ancient empires conquering other lands. Their desire to have as much power possible led to great expansion and the conquering of other lands. The Ottoman Empire, British Empire and Roman Empire all led to domination over the conquered peoples and forced influences on their own cultures (Hussain 2011). Today as the empires are broken up into individual nation states we see the lust for power rise to the surface in other ways. The United States, seen as the greatest defender of democracy, also hopes to impose it on other countries. Such is evidenced today by our militaristic intervention in Iraq and Afghanistan. While we donââ¬â¢t wish to maintain any level of control in these countries as some do by hoping to include Canada and Mexico as part
Wednesday, November 20, 2019
Stop and frisk Research Proposal Example | Topics and Well Written Essays - 500 words
Stop and frisk - Research Proposal Example causal relationship exist between two variables when a cause exist and some consequences follow the cause and policy enforcement is the cause with change in gun violence rate as the effect. Existence of a correlation relationship that other factors cannot explain is another requirement for a causal relations and research control can ensure this (Aparasu 72). Implementation of the policy is the independent variable while incidence of gun violence is the dependent variable. Implementation of the stop and frisk policy and effects of the implementation are the concepts for measure. Implementation defines effective enforcement of the policy within the perception of citizens while effects of implementation define associated change in gun violence behavior among the public because of the policy implementation. In addition to peer group questionnaire that background study identified, I plan to use existing data on the subject and opinions among psychology and criminology experts in collecting data on the concepts. Individuals who have been accused of gun violence and those who have close relation to the already accused individuals ate the studyââ¬â¢s target population. One of the major characteristics of the population is arrest or issuance of arrest warrant against an individual. These characteristics forms the characteristics of the remaining population segments, associated of the accused. Criminal records from attorneyââ¬â¢s office will help in identification of individuals who have been arrested or against whom arrest warrants have been issued for gun violence crimes. Background study on the identified individuals will facilitate identification of their associates. A survey design will be used will be used for data collection because of its potential to collect data of human traits (Aparasu 161). Cross sectional approach will be implemented to collect data relating to periods before the policy and after the policy. This will also incorporate data on application and
Monday, November 18, 2019
Theology Marriage in the 20th Century Essay Example | Topics and Well Written Essays - 750 words
Theology Marriage in the 20th Century - Essay Example Duncan thinks that perhaps knowing how to fight will help his son survive as a man in a man's world, just as he thinks this skill helped himself and his brothers cope with life: "Over time, physical combat begot intellectual combat, and our competitiveness and discipline allowed us to be fairly successful in the world" (Duncan 2009, 1). Mr. Duncan wants to be a just parent, as he worries about "failing [his] children" (Duncan 2009, 1). What he means to be the implications of failing his children, one is not exactly sure. Would his children become effeminate if they didn't learn how to fight Would they not have material success in the world if they didn't learn how to fight Duncan says the conflict between pacifism and fighting "creates a kind of parental dissonance, a discomfort that [he feels] slightly embarrassed to talk about in polite company" (Duncan 2009, 1). Duncan wonders if he is being a good father by not teaching his son to fight-just as his own father seemed to have been an effective father by teaching his sons how to fight, and also carry on the legacy of his grandfather. Duncan seems to be indebted to his father but conflicted by the social message of the Catholic teaching he grew up with: "My father would tell me that my son should learn to fight. My church tells me he should learn to love. Am I a bad father for teaching him one, and not the other I hope not" (Duncan 2009, 1). In some ways, Duncan feels a call to lead a "countercultural" sort of lifestyle. He says he is "a Catholic who takes the call to be a peacemaker much more seriously than [his] own parents did. Though [he] is not a pacifist[he has] great admiration and respect for the kind fo courage pacifism entails[my own] paradox" (Duncan 2009, 1). Some advice for Mr. Duncan is in order. First of all, Mr. Duncan must realize that there are certain unwritten codes which we all follow according to the gender roles which society dictates. In a study of ads, "Goffman's models seem to follow one body of tacit social rules about gender, not two or three, or some mix[a sort of] code" (Hochschild 2003, 46). Mr. Duncan's child is young. It is normal for a child to question at that age who he is. "So, at this point [in a boy's life], [he's] asking [himself], Who and what am I Is this my identity" (Cahill 2006, 146) A good relationship with his father is guaranteed to help his son have success in life, not learning how to fight necessarily. Gathered from the "clinical experience of many psychiatrists and therapists doesstemfrom problematic relationships with parents. The basic idea is that each individual in some sense has to 'achieve' his gender identity by going through a developmental process" (Cahill 2006, 153). This solves the issue of gender roles. Now, Duncan is worried if he is being a just parent. "[W]here the ordinary relationships with parents are disrupted [in this process of achieving gender identity]this process is short-circuited" (Cahill 2006, 153). Clearly Duncan does not have problems here. He may perceive he is being a bad parent if he does not clearly define gender roles-ultra-masculinity being demonstrated by the fact that his son would know how to fight. "Ultra-femininity, like ultra-masculinity, may mask the underlying
Saturday, November 16, 2019
Communication Diversity and the Human Services Worker
Communication Diversity and the Human Services Worker Communication Diversity and the Human Services Worker Introduction Effective communication is more than just passing information from one person to another, we communicate both verbally and non-verbally (Howard 1991) in addition, we all hunger for contact that is meaningful. A communicator enters into relationships with other people (Gamble Gamble 2008). Healthy communication is essential, we all like to be valued and heard, and it is fundamental to all people from all facets of life and in all sectors of society (Bolton 1987, p. 4). Daily, human services workers encounter a diverse range of people, from colleagues to clients, professionals, and the public. Therefore, responding appropriately is necessary for effective communication to occur. Communication is never neutral (Tyler, Kossen Ryan 2005, p. 26) furthermore, we construct our world view from our own point of view as well as the point of view of the culture or society that we inhabit (Tyler, Kossen Ryan). Hence, there can be barriers to effective communication when class and low socio-economic circumstances are present. There is a tendency for Australians to look down on low-income earners and those receiving government benefits. To some, a low-income earner has less value because the belief is that they are non-contributors to the wealth and growth of Australian society. While this occurs less in the human services industry than in general, none the less it still occurs. Terms used within the community such as dole bludger have a negative connotation, and present difficulties that impact in an unconstructive manner on low income earners who may already be feeling guilty about their inability to find employment. Careless terms, labels, and negative attitudes build resentment, which has consequences that can flow on from clients to their families, whether from ill health, crime, family breakdowns, or drug and alcohol problems. Ineffective communication causes an interpersonal gap that is experienced in all facets of life and in all sectors of societyeven death results when communication breaks down (Bolton 1987, p.4). Covey (1989, p. 239) states, Unless you are influenced by my uniqueness, Im not going to be influenced by your advice therefore, building effective emotional bank accounts (Covey, p. 239) is crucial for successful communication to occur. This essay will address issues that confront human services workers and the challenges they face when working with unemployed people from low socio-economic backgrounds. Situation Australia is supposed to be an egalitarian society but increasingly it is becoming a nation of haves and have nots. The divide between rich and poor continues to expand (Barrett, Crossley Worswick 1999; The Age 1999, cited in Healey 2001). Stratification based on economic and social position is becoming a part of the Australian identity (Hartley 2002). The success of some at the expense of others has also seen growing resentment by those on welfare who see themselves as victims (The Weekend Australian 2000, p. 23, cited in Healey 2001). Hegemony refers to the dominant classes maintenance of social and cultural domination over others (OSullivan et al. 1983). It forces people to hand over their power either consciously or unconsciously by creating a power bloc (OSullivan, p. 102). Government agencies such as Centrelink, job network centres, and training institutions, which in theory are neutral and are there to represents everybody often exercise their power to achieve hidden company outcomes. As the dominant economic class, they look after the interests of the company first and their clients needs often become secondary. Unequal power relationships that influence the manner in which people communicate with each other are easy to develop and difficult to dismantle. The exchange between senders and receivers is an active encounter in which participants frequently occupy positions of unequal power (Kress 1988, p15). Those on the receiving end feel diminished, unheard, and often defensive. Negative stereotypes on both sides are liable to increase, and self-fulfilling prophecies and conflict occurs because of ineffective communication. There is growing concern about welfare dependency and the impact this is having on the economy. There is a shift in government policy, the emphasis now is that those on welfare must accept more responsibility for their economic circumstances (Saunders 2005). Community service workers understand that participation in order to lead a rich meaningful life within the community it is necessary to have a healthy self-esteem. They are aware that social exclusion and unemployment deny people the opportunity to participate (Saunders). Approach Reading body language, paying attention to details and clear effective communication require well developed skills that human service workers need to keep in mind when working with clients. When communication, the life blood of every relationship (Bolton 1987, p. 6) is positive, it creates nurturing fulfilling relationships. As fifty-five percent of all communication consists of body language (Hargie Dickson 2004, p. 46), particular attention to non-verbal communication skills is required. Non-verbal communication such as a sneer, a sense of distain, or body language that is closed, communicates indifference, which can be as damaging as a verbal confrontation. As a human services worker it is essential that the clients your there to assist do not feel ostracised by the agencies assigned to help them. Human service workers must be conscious of non-verbal behaviour, their own and their clients because non-verbal behaviour often contains significant, misleading, and undeclared messages (Baney 2004). How people dress, their posture, eye contact and how they walk all convey meaning, and reveal to the observer a myriad of information. Cultural differences need to need recognition, studies show that African Americans and white Americans gaze in opposite directions when spoken to (Hargie 2006), Indigenous Australians also avoid eye contact. Avoid judgements because for clients to develop a healthy self-concept, judgement does not have to be verbal to be experienced. Judgement is one of the major roadblocks to successful communication (Rogers cited in Bolton 1987, p.17). Most people fear rejection and the surest way to create it in relationships with people is through judgement and criticism. Our sense of self develops through our interactions with others, we are social beings, and developing self-awareness is an important step in understanding ourselves and other people (Gamble Gamble 2008). Our self-concept and self-image is often warped and unbalanced, often how we see ourselves differs from how others see us. Our culture teaches us to repress our feelings, and many people are unaware of what emotionally, is actually occurring inside of them (Bolton 1987). A new counsellor may want to help clients avoid painful emotions, but emotional release encourages healing processes to occur (Geldard Geldard 1998, p. 50). An effective counsellor has the capacity to help their clients to feel what is happening within them, by either understanding what the client is verbally expressing, or transmitting by body language. By assisting clients whose body language maybe conveying feelings of inadequacy or inferiority, a human services worker, can bring to their clients attention factors that their clients maybe unaware of, and hence the client can begin to address them. Human service workers must be aware that giving advice can create interfere-iority complex (Bolton 1987, p. 22) and they must avoid giving advice but rather assist clients to find solutions. How something is expressed alters reactions, and those with low self-esteem often expect criticism from others, and possibly will read into statements meaning that was never there (Bolton 1987). Human service workers have the ability to reflect feelings back to the speaker, and are in a position to offer assistance that can and does make a difference in peoples lives. Building self-esteem can mean the difference between employment and continuing unemployment for a client, as a positive relationship exists between career development and the ability to communicate effectively (Bolton 1987, Gamble Gamble 2008). Therefore, human services workers are required to have skills that go beyond those of basic communication. Listening, assertion, conflict-resolution, and collaborative problem solving skills (Bolton 1987) are strengths that assist practitioners successfully negotiate interpersonal communication. As Bolton says low-level communication, leads to ineffectiveness, both at work and in personal communication, consequently by developing effective intercommunication skills it will lead to increased competence in all areas of life. Listening skills are required for successful communication, paraphrasing lets the listener know that you understand what the speaker has said. It allows the listener to comprehend the context of what the speaker said, and therefore the speaker knows understanding has been achieved. Communication skills require empathy and genuineness and need to affirm and validate peoples experiences (Kenny, 1994). Attending skills, following skills and reflective skills (Bolton 1987) are all a part of listening and allow the listener to demonstrate a clear understanding of what the speaker has conveyed. Listening allows a counsellor to bring to the attention of clients the negative self-talk they may use. Clients can then overcome barriers and create for themselves employment opportunities previously denied with knowledge, new skills, and understanding. Conclusion Human service workers are at the forefront in developing new programs aimed at increasing participation within the workforce. They are working for government and job network agencies on programs that address issues such as appearance, attitude, and communication styles. They are aware that sending solutions (Bolton 1987, p.20) rather than assisting clients to come to their own conclusions are barriers to empowerment that could undermine a clients motivation. Eighty percent of people who fail at work do so for one reason: they do not relate well to other people (Bolton 1987, p. 7). Human service workers are adopting principals, with the intention of addressing this problem. They know that with the correct assistance the downward spiral that creates unemployment, class stigma, and low income is reversible. By assisting low-income earners and unemployed people to understand how their verbal and non-verbal cues are preventing them from leading fulfilling lives can help motivate people to change. Methods learnt as a child can be undone and the barriers broken so that they can participate in a meaningful way, to live fulfilling personal and social lives, as well as gaining employment. Skill building workshops, training workshops, and counselling aimed at improving interpersonal relations are a practical solution in assisting clients to gain the skills required to communicate effectively. The flow on from that comes from learning how communication barriers lead to anger, ineffectual and damaging social relationships and that a clearer understanding will empower, and assists the disadvantaged members of society. Creating a ripple effect that will be of benefit to the wider community. Communication is our link to the rest of humanity (Gamble Gamble 2008, p.5), therefore as workers in the human services industry by helping clients to win, ultimately we all share the rewards. References Baney, J 2004, Guide to interpersonal communication. Pearson Education, Upper Saddle River, New Jersey. Barrett, G, Crossley, T Worswick, C 1999, Consumption and income inequality in Australia, Centre for Economic Policy Research, Australian National University Discussion Paper no.40. Bolton, R 1987, People skills, Simon and Schuster, NSW. Covey, SR 1989, 7 habits of highly effective people, Simon and Schuster, New York. Gamble, TK Gamble, M 2008, Communication works, McGraw-Hill, New York. Geldard, D Geldard, K 1998, Reflection of feelings, in Basic personal counselling, Prentice Hall, Frenchs Forest, pp. 49-58. Hargie, O 2006, Skill in practice: An operational model of communicative performance, in O. Hargie (ed.), The handbook of communication skills, Routledge, London, pp. 37-70. Hargie, O Dickson, D 2004, Nonverbal communication, in Skilled interpersonal communication: research theory, and practice, Routledge, London, pp. 43-66. Hartley, J 2002, Communication cultural and media studies, Routledge, London. Healey, J (ed.) 2001, The wealth divide, Issues in Society, vol 141, The Spinney Press, NSW. Howard, G 1991, Can you put it on a t-shirt? David Charles, London. Kenny, S 2007, Developing communities for the future, Thompson, Victoria. Kress, G 1988, Communication and culture, in G. Kress (ed.), Communication and culture, New South Wales University Press, NSW. OSullivan, T, Hartley, J, Saunders, D Fiske, J, 1983, Key concepts in communication, Routledge, London. Saunders, P 2005, Welfare to work in practice, in P.Saunders (ed.), Welfare to work in practice social security and participation in economic and social life, Ashgate, Hants, England, pp. 1-7. Tyler, S, Kossen, C Ryan, C, 2005, Theories of communication, in Communication: a foundation course, Pearson Education Aust., Frenchs Forest, NSW, pp. 16-26.
Wednesday, November 13, 2019
Albert Camus The Myth of Sisyphus Essays -- Papers Albert Camus Sisyp
Albert Camus' The Myth of Sisyphus Albert Camus' essay, 'The Myth Of Sisyphus' is an insightful analysis of the classic work, 'The Myth Of Sisyphus'. In some regards Camus' view of Sisyphus can seem quite accurate and in tune with the original text, but based on Camus' interpretation of the justness of Sisyphus' punishment, it is clear that the writer has some different ideas as well. Camus concludes that this punishment does not have the effect the Gods had intended, and ultimately the tragic hero must be seen as being 'happy'. This is his greatest departure from the intent of the original myth wherein the reader is left with the feeling that Sisyphus' punishment can be seen as appropriate and just. As his punishment for repeatedly outwitting the Gods, Sisyphus is forced to roll a great rock up a steep hill only to have it roll back down each time he reaches the top, forever condemned to repeat the process over and over again. It is this punishment that Camus is most focused on, as the topic of Sisyphus? trickery only comes up to give the reader some background on the story. It is unusual however that Camus considers this punishment as an, ?unspeakable penalty in which the whole being is exerted toward accomplishing nothing?, and at the same time assumes that; ?The struggle itself towards the heights is enough to fill a man?s heart.? The gratification that one might find through hard work could certainly be seen as an accomplishment, but it?s hard to see how this pertains to Sisyphus. Camus states that, ?the workman of today works every day in his life at the same tasks?, and that his fate is, ?no less absurd.? If a man whistles while performing his laborious job it is onl y because it is assumed that the fruits... ...l text was meant to represent. Camus states that, ?myths are made for the imagination to breathe life into them?, and he surely takes advantage of this. If it is true that Sisyphus truly owns his fate and is the master of his own ?absurd? universe, then that should be seen as his greatest punishment of all, for it does not amount to very much, and as Camus himself pointed out, ?the rock is still rolling.? Bibliography: Works Cited Bierlein, J.F. ?The Myth Of Sisyphus.? Lives Through Literature A Thematic Anthology (3rd ed.). Helane Levine Keating and Walter Levy. New Jersey: Prentice Hall, 2001. 1042-43. Camus, Albert. ?The Myth Of Sisyphus.? Lives Through Literature A Thematic Anthology (3rd ed.). Helane Levine Keating and Walter Levy. New Jersey: Prentice Hall, 2001. 1044-46.
Monday, November 11, 2019
The Influence of Temperature in the Forward Osmosis Process
Chapter FourMathematical Model Chapter Four THEORETICAL ANALYSISMA andMathematical Modeling Purpose of the survey is to probe of temperature as a factor that influences the conveyance of H2O across the membrane in FO procedure. The steady-state theoretical accounts have been developed to foretell H2O ià ¬Ã¢â¬Å¡ux (JouleTungsten) as map of temperature (Thymine) and bulk concentration (C) ( i.e. Draw and Feed concentration ) . It was besides study the consequence of temperature on some belongingss, such as Solute diffusion coefficient (CalciferolSecond) , Mass transportation coefficient (K) , Permeability coefficient (A) and Solute electric resistance (Km) . 4.1 Osmotic Pressure The osmotic force per unit area (?) of a solution depends on the concentration of dissolved ions in solution and the temperature of solution, and can be computed by utilizing Va n't Hoff equation: WhereNis the vanââ¬â¢t Hoff factor ( histories for the figure of single atoms of a compound dissolved in the solution ) ,?is the osmotic coefficient,Cis the molar concentration ( molar concentration ) of the solution,Roentgenis the gas invariable andThymineis the absolute temperature of the solution. The vanââ¬â¢t Hoff factor is introduced to cover divergences from ideal solution behaviour that include finite volume occupied by solute molecules and their common attractive force as in new wave derWaals attractive force ( Howard, 2003 ) . Table 4.1 show osmotic coefficients (?) for a figure of solutes of physiological importance ( Khudair, 2011 ) . For all solutes?depends on the substance and on its concentration. As the concentration of any solute attacks zero its value of?attacks 1. In ideal solution,?= 1 ( Glass tone, 1974 ) . Table 4.1 Osmotic Coefficients (?) and Vanââ¬â¢t Hoff Factor ( N ) for a Number of SolutesSubstanceVanââ¬â¢t Hoff Factor (N)Osmotic Coefficients ( ? )NaCl20.93KCl20.92HCl20.95New hampshire4Chlorine220.92NaHCO320.96CaCl230.86MgCl230.89Sodium2So430.74MgSO420.58Glucose11.01Sucrose11.024.2 Concentration Polarization 4.2.1 External Concentration Polarization Concentration polarisation ( CP ) is the accretion of solutes near the membrane surface and has inauspicious effects on membrane public presentation. The ià ¬Ã¢â¬Å¡ux of H2O through the membrane brings feed H2O ( incorporating H2O and solute ) to the membrane surface, and as clean H2O ià ¬Ã¢â¬Å¡ows through the membrane, the solutes accumulate near the membrane surface. Equations for concentration polarisation can be derived from ià ¬?lm theory and mass balances. Harmonizing to ià ¬?lm theory, a boundary bed signifiers at the surface of the membrane. Water and solutes move through the boundary bed toward the membrane surface. As H2O base on ballss through the membrane, the solute concentration at the membrane surface additions. The concentration gradient in the boundary bed leads to diffusion of solutes back toward the majority provender H2O. During uninterrupted operation, a steady-state status is reached in which the solute concentration at the membrane surface is changeless w ith regard to clip because the convective ià ¬Ã¢â¬Å¡ow of solutes toward the membrane is balanced by the diffusing ià ¬Ã¢â¬Å¡ow of solutes off from the surface. A mass balance can be developed at the membrane surface as follows: Mass accretion = mass in ? mass out ( 4.2 ) With no accretion of mass at steady province, the solute ià ¬Ã¢â¬Å¡ux toward the membrane surface must be balanced by ià ¬Ã¢â¬Å¡uxes of solute ià ¬Ã¢â¬Å¡owing off from the membrane ( due to diffusion ) and through the membrane ( into the permeate ) as follows: WhereMeteris mass of solute,Jouletungstenis the experimental permeate H2O flux,Tis clip,CalciferolSecondis the diffusion coefficient of the solute,omegathe distance perpendicular to membrane surface,Cpeis the solute concentration in the permeate andEââ¬Ëis the surface country of membrane. Equation 4.3 applies non merely at the membrane surface but besides at any plane in the boundary bed because the net solute ià ¬Ã¢â¬Å¡ux must be changeless throughout the boundary bed to forestall the accretion of solute anyplace within that bed ( the last term in equation 4.3 represents the solute that must go through through the boundary bed and the membrane to stop up in the permeate ) . Rearranging and incorporating equation 4.3 across the thickness of the boundary bed with the boundary conditions C ( 0 ) = CMeterand C ( ?Bacillus) = CF, cell, where CF, cellis the concentration of provender cell solution and CMeteris the concentration at the membrane surface, are done in the undermentioned equations: Integration outputs WhereKis the mass transportation coefficient and?Bacillusthickness of the boundary bed, rearranging the equation 4.6 when utilizing the vanââ¬â¢t Hoff equation the eventually theoretical account from the concentrative external concentration polarisation at each permeate flux, could be calculated utilizing: Where?F, Bis the osmotic force per unit areas of feed solution at the majority and?F, mis the osmotic force per unit areas of the provender solution at the surface membrane. Note that the advocate is positive, he pointed out that ?F, m& A ; gt ; ?F, B. The draw solution in touch with the permeate side of membrane is the being diluted at the permeate membrane interface by the permeating H2O ( Moody and Kessler, 1976 ) . This is called diluted external CP. Both dilutive external CP phenomena cut down and concentrative the effectual osmotic driving force. A dilutive external CP modulus be identified as above, merely In the present instance, the concentration of the majority greater than concentration of the draw solution at the membrane surface ( i.e. ?D, B& A ; gt ; ?D, m) ( Cath et al. , 2006 ) : Where?D, mis the osmotic force per unit areas of the draw solution at the membrane surface and?D, Bis the osmotic force per unit areas of draw solution at the majority. The general equation depicting H2O conveyance in FO, RO, and PRO is ( Cath et al. , 2006 ) : Where,Athe H2O permeableness invariable of the membrane, ? the contemplation coefficient, and a?â⬠P is the applied force per unit area. For FO, a?â⬠P is zero ; for RO, a?â⬠P & A ; gt ; a?â⬠? ; and for PRO, a?â⬠? & A ; gt ; a?â⬠P ( see figure 4.1 ) . Figure 4.1 Direction and magnitude of H2O as a map of ?P. To pattern the flux public presentation of the forward osmosis procedure in the presence of external concentration polarisation, we start with the flux equation for forward osmosis, given as We assume that the salt does non traverse membrane, the osmotic contemplation coefficient (?) , assume equal 1. Equation 4.10 predicts Flux as maps of driving force merely in the absence dilutive external concentration polarisation or concentrative, which may to be valid merely if the permeating flux is excessively low. When higher flux rates, must be modified to include this equation both the dilutive external concentration polarisation and concentrative: Figure 4.2 ( a ) shows this phenomenon with a dense symmetric membrane ( McCutcheon and Elimelech, 2006 ) . 4.2.2 Internal Concentration Polarization If the porousness support bed of asymmetric membrane confronting feed solution, as is the instance in force per unit area retarded osmosis ( PRO ) , Polarization bed is established along interior of heavy active bed as H2O and solute propagate the porousness bed ( Figure 4.2 ( B ) ) . This is referred to as concentrative internal concentration polarisation, this phenomenon is similar to concentrative external concentration polarisation, except that it takes topographic point within the porous bed, and therefore, can non be underestimated by cross flow ( Lee et al, 1981 ) Obtained look patterning this phenomenon in force per unit area retarded osmosis ( Loeb et al. 1997 ) . This equation describes internal concentration polarisation ( ICP ) the effects and how it links to H2O flux, salt permeableness coefficient ( B ) and H2O permeableness coefficient: WhereKmis the opposition to solute diffusion within the membrane porous support bed,Kmis defined as WhereSecondthe membrane structural parametric quantity,?mis the thickness,?is the tortuousness and?is the porousness of the support bed,Kmis a step how easy it can be dissolved widespread support inside and outside Layer, and hence is a step of the strength of ICP. We maintain the usage of theKmterm due to convention established in old surveies on internal concentration polarisation. Salt permeableness coefficient ( B ) is about negligible compared with the other footings in the equation 4.12. Therefore, we ignore salt flux in the way of H2O flux and any transition of salt from the permeate ( draw solution ) side ( Gray et al. , 2006 ) . Therefore, flux can be solved for implicitly from equation 4.12: The exponential term in equation 4.14 is the rectification factor that could be considered the concentrative internal concentration polarisation modulus, defined as Where ?F, Iis the osmotic force per unit area of the feed solution on the interior of the active bed within the porous support. The positive advocate indicates that ?F, I& A ; gt ; ?F, B, or that the consequence is concentrative. Substitute Equation 4.8 into 4.14 to obtain an analytical theoretical account for the impact of internal and external concentration polarisation on H2O flux: All the footings in equation 4.16 are readily determined through computations or experiments. From equation we can cipher the flux of H2O through the membrane where feeding solution is placed against asymmetric support bed and the draw solution on the active bed. In forward osmosis applications for desalinization and H2O intervention, the active bed of the membrane faces the provender solution and the porous support bed faces the draw solution ( Kessler and Moody, 1976 ) . As H2O permeates the active bed, the draw solution within the porous infrastructure becomes diluted. This is referred to as dilutive internal concentration polarisation ( Figure 4.2 ( degree Celsius ) ) . ( Loeb et al, 1997 ) Descriptions likewise flux behaviour in the development of forward osmosis: When presuming that B = 0 ( i.e. , the salt permeableness is negligible ) and the equation 4.17 is agreement, are acquiring an inexplicit equation for the flux of H2O permeating: Here, ?D, Bis now corrected by the dilutive internal concentration polarisation modulus, given by Where ?D, Iis the concentration of the draw solution on the interior of the active bed within the porous support. The negative advocate because the H2O flux is in the way off from the membrane active bed surface, In other words, the concentration polarisation consequence in our instance is dilutive, intending that ?D, I& A ; lt ; ?D, Bby replacing equation 4.7 into 4.18, we get The footings in equation 4.20 are mensurable system conditions and membrane parametric quantities. Note that here ; dilutive internal concentration polarisation is coupled with concentrative external concentration polarisation, whereas in the equation 4.16, concentrative internal concentration polarisation was coupled with dilutive external concentration polarisation. In each of these instances, the external concentration polarisation and internal concentration polarisation moduli all contribute negatively to the overall osmotic drive force. The negative part of each addition with higher flux, which suggests a self-limiting flux behaviour, this implies that increasing osmotic drive force will supply decreasing additions in flux ( Tang et al. , 2010 ) . Figure 4.2 Illustration of osmotic driving force profiles for osmosis through several membrane types and orientations, integrating both internal and external concentration polarisation. ( a ) The profile illustrates concentrative and dilutive external CP. ( B ) PRO manner ; the profile illustrates concentrative internal CP and dilutive external CP. ( degree Celsius ) FO manner ; the profile illustrates dilutive internal CP and concentrative external CP (McCutcheon and Elimelech, 2006 ) . In this hunt if taking transmembrane temperature difference into history, the temperature being next to membrane surface will besides differ from that in bulk solution due to the happening of heat transportation. Hence, utilizing vanââ¬â¢t Hoff jurisprudence for computation of osmotic force per unit area requires the temperature points to be purely in line with the concentration points as WhereC,TDandTFis the concentration, temperature draw and temperature, with the inferiors F, cell ( feed cell solution ) and D, cell ( draw cell solution ) . The theoretical account to foretell H2O ià ¬Ã¢â¬Å¡ux can be rewritten to a modiià ¬?ed by replacing equation 4.21 and 4.22 in 4.20, we get Figure 4.3 gives the conventional illustration of the concentration and temperature proià ¬?les in FO procedure operated under active bed ââ¬â provender solution ( ALââ¬âFS ) . Figure 4.3Conventional diagram of mass and heat ià ¬Ã¢â¬Å¡ux proià ¬?les within boundary bed and membrane during FO procedure under ALââ¬âFS manner in the presence of temperature difference ( TF, cell& A ; gt ; TD, cell) . 4.3 Heat Flux Heat transportation from the solution to the membrane surface across the boundary bed in the side of the membrane faculty imposes a opposition to mass reassign The temperature at the membrane surface is lower than the corresponding value at the majority stage. This affects negatively the drive force for mass transportation. Under steady province conditions, derived from the heat balance, the heat transportation in the single compartments of system is represented by the undermentioned equation: In which Q denotes the heat flux, and the inferiors FS ââ¬â BL, m and DS ââ¬â BL represent feed solution boundary bed, membrane and draw solution boundary bed. By stipulating the equation 4.24, we obtain WhereHis the single heat transportation coefià ¬?cient,CPthe speciià ¬?c heat of H2O,?tungstenthe H2O denseness. Rearranging the equation 4.25 gives expressed looks of temperature near the membrane surfaces as ( Zhong et al. , 2012 ) It is sensible to deià ¬?ne the temperature at interface of SL and AL by averaging theThymineF, mandThymineD, m 4.4 Heat Transfer Coefficients The finding of heat transportation coefià ¬?cientHis developed on the footing of the correlativity between Nusselt, Reynolds and Prandtl figure ( Holman, 2009 ) . For the laminar flow: For the disruptive flow: WhereNu=hL/? , Pr =CPhosphorusà µ/? ,and.Nu is the Nusselt figure,Rheniumthe Reynolds figure andPraseodymiumthe Prandtl figure. TheCPhosphorusis the speciià ¬?c heat,Literlength of the channel,à µthe dynamic viscousness, and ? the thermic conduction of NaCl solution. The valueà µis obtained harmonizing toà µ = , in which?is the solution denseness, and?the kinematic viscousness. The dependance of?on temperature can be described by Where And are the thermic conduction of H2O at temperature T and 298.15 K. The heat transportation coefficientHcalculated by Where happenNufrom equation 4.29 or 4.30 The overall heat transportation coefficientHmof FO membrane embodies the thermic conduction of both liquid-phase H2O go throughing the micro pores and the solid-phase membrane 4.5 Mass Transfer Coefficient The mass transportation coefficient is a map of provender flow rate, cell geometry and solute system. Generalized correlativities of mass transportation, which have been used by several writers ( Sourirajan, 1970 ) , suggest that the Sherwood figure,Sh,is related to the Reynolds figure,Re,and Schmidt figure,Sc,as: For the laminar flow: For the disruptive flow: Whereand.Shis the Sherwood figure,Scandiumthe Schmidt figure andvitamin DHis the hydraulic diameter, the hydraulic diameter is deià ¬?ned as Where tungsten and h the channel breadth and channel tallness severally. The parametric quantities,CalciferolSecondand?rely strongly on temperature, which can be quantitatively determined by empirical equations below. For aqueous electrolyte like NaCl,CalciferolSecondvalue of the ions is presented by ( Beijing, 1988 ) Where Nà ±is the absolute valley of ions ( i.e. Nà ±=1 ) , and ?à ±is the tantamount conduction of Na+and Clââ¬âions, estimated as ( 4.40 ) In which( 5.1Ãâ"10-3m2/? for Na ions ; 7.64Ãâ"10-3m2/? for chloride ions ) is the mention tantamount conduction at 298.15 K ; temperature coefficient,,forSodium+, and,,for, severally. The empirical equations were employed to gauge kinematic viscousness of NaCl solution as Whereis the H2O viscousness at temperature T, expressed as In whichvitamin E= 0.12,degree Fahrenheit= -0.44,-Ãâ = -3.713,I=2.792 are the fitting parametric quantities,CSecondthe NaCl molar concentration, andThymineRoentgenthe normalized temperature. There is besides another manner to cipher diffusion coefficient in the liquid stage of a dilute solution can be estimated by the Stokes ââ¬â Einstein equation if the solute radius is clearly larger than the solvent radius WhereKBacillusis the Boltzmann invariable, T ( K ) is the absolute temperature, à µ is the dynamic viscousness of the liquid and ROis the radius of the solute. To cipher diffusion coefficients in aqueous solutions predict that diffusion coefficients really linearly with temperature and reciprocally with viscousness. Indeed, harmonizing to Li and Gregory, ( 1974 ) . In instance of the stokes ââ¬â Einstein relation the diffusion coefficientD ( T )at a temperatureThymineis given as Where D( TO)is the diffusion coefficient at a mention temperatureThymineOandà µ ( T )andà µ ( TO)are the dynamic viscousnesss at temperaturesThymineandThymineO, severally. Note that temperatures are given in Kelvin. Finally the mass transportation coefficient K calculated by WhereShdiscovery from equation 4.36 or 4.37 4.6 Water Permeability Coefficient The equation ciphering pure H2O permeableness coefià ¬?cient A for FO procedure is derived from the theoretical account ; thereby the H2O ià ¬Ã¢â¬Å¡ux of rearward osmosis procedure is predicted ( Baker, 2004 ) WhereCtungstenis the H2O molar concentration,Volttungstenthe molar volume of H2O,Calciferoleffthe effectual H2O molecule diffusivity within the pores of active bed of the FO membrane Wherevitamin DSecond( 4AO) andvitamin DPhosphorus( 7.2AO) are the diameter of H2O molecule and pore, and D the evident diffusivity, which is given as Along with H2O dynamic viscousness ( à µw ) predicted by There is besides another manner to cipher membrane permeableness ( A ) ià ¬Ã¢â¬Å¡at-sheet bench-scale RO trial system was used to find the H2O permeableness coefià ¬?cient ( A ) of the CTA membrane. A membrane voucher holding an effectual surface country of 64 centimeter2was the active bed of the membrane confronting the provender solution. Mesh spacers placed in the provender channel enhanced the turbulency of the ultrapure H2O provender watercourse. A hard-hitting positive supplanting pump was used to recirculate the provender solution at 12 L/h. The FO membrane H2O permeableness coefià ¬?cient ( A ) was determined utilizing ( Lee et al. , 1981 ) . Where is the osmotic force per unit area difference across the membrane and ?P is the hydraulic force per unit area difference across the membrane. Because ultrapure H2O was used as the provender solution, was zero during the experiments. Pressure was increased from 1 saloon to 2 saloon. Pressure was held changeless at each increase for continuance of 3 h. Water ià ¬Ã¢â¬Å¡ux through the membrane was calculated based on the increasing weight of the permeant H2O on an analytical balance. The temperature was held changeless at 25OC. See figure 4.4 Figure 4.4 Flux vs. force per unit area and the swill is representedH2O permeableness coefià ¬?cient ( A ) . 4.7 Recovery Percentage The recovery factor measures how much of the provender is recovered as permeate. It is reported as a per centum ( Al-Alawy, 2000 ) . The recovery of the membrane was calculated by spliting the overall of permeate rate by the provender rate solution. Recovery, or transition, is defined by: WhereVoltPhosphorusis the overall permeate volume andVoltFis the provender volume solution. Figure 4.5 the flow chart of patterning FO H2O flux at different temperature matrixes. 1
Saturday, November 9, 2019
The Advantages and Disadvantages of Spell Checkers
The Advantages and Disadvantages of Spell Checkers A spell checker is a computer application that identifies possible misspellings in a text by referring to the accepted spellings in a database. Also calledà spell check, spell-checker, spellchecker andà spelling checker. Most spell checkers function as part of a larger program, such as a word processor or search engine. Examples and Observations Dont they teach you how to spell these days?No, I answer. They teach us to use spell-check.(Jodi Picoult,à House Rules.à Simon Schuster, 2010) Spell Checkers and the Brain Psychologists have found that when we work with computers, we often fall victim to two cognitive ailmentscomplacency and biasthat can undercut our performance and lead to mistakes. Automation complacency occurs when a computer lulls us into a false sense of security. . . .Most of us have experienced complacency when at a computer. In using e-mail or word-processing software, we become less proficient proofreaders when we know that a spell-checker is at work. (Nicholas Carr, All Can Be Lost: The Risk of Putting Our Knowledge in the Hands of Machines. The Atlantic, October 2013)[W]hen it comes to autocorrect, spellcheck, and their ilk, those who would blame digital technology for language decay are not entirely wrong. Our brains seem to become less vigilant when we know a grammatical safety net will catch us. A 2005 study found that students who got a high score on the verbal section of either the SAT or the Gmat missed twice as many errors proofreading a letter in Microsoft Word with the programââ¬â¢s squiggly colored lines highlighting likely mistakes as they did when the spell-check software was turned off. (Joe Pinsker, Punctuated Equilibrium. The Atlantic, July-August 2014) Microsofts Spellchecker Microsofts language experts also track word requests, as well as frequently corrected words, to assess whether those words should be added to the Speller dictionary (Speller is the trademark name of Microsofts spell-checker). One recent request was pleather, meaning a plastic faux leather, which was added because of a lobbying effort by the group People for the Ethical Treatment of Animals. If youve got the latest goods from Microsoft, pleather shouldnt get a red squiggly.In other cases, real words are intentionally kept out of the programs dictionary. A calender is a machine used for a specialized manufacturing process. But most people see calender as a misspelling of calendar. The wordsmiths at Microsoft have decided to keep calender out of the programs dictionary, figuring that at the end of the day its more useful to fix so many misspelled calendars, than it is to cater to the sensibilities of a small subset of the population who happen to know of, and want to write about, calend ers. Similar homophones (computer people call them common confusables) include words like rime, kame, quire, and leman. (David Wolman, Righting the Mother Tongue. Collins, 2008) The Limitations of Spellcheckers In fact, you have to be quite good at spelling and reading in order to use a spellchecker effectively. Typically, if you have misspelled a word the spellchecker will offer a list of alternatives. Unless your initial attempt is reasonably close to the correct spelling, you are unlikely to be offered sensible alternatives, and, even if you are, you have to be able to make sense of what is on offer. You and your pupils also have to be aware of the limitations of spellcheckers. First, you may correctly spell a word but simply use the wrong one; for example, After I had eaten my super I went straight to bed. A spellchecker will not spot that it should be supper not super (did you spot the mistake?). Second, the spellchecker does not recognize some perfectly acceptable words. (David Waugh and Wendy Jolliffe, English 5-11: A Guide for Teachers, 2nd ed. Routledge, 2013) Spellcheckers for Writers With Learning Disabilities Spellcheckers have revolutionised the lives of many dyslexic people and come to the rescue of beleaguered editors. Some snags still arise, as when homophones are used incorrectly. The speech option spellchecker can overcome these difficulties by giving definitions and using them in sentences for clarification and meaning. Some find it helpful if the spellchecker is turned off when they are doing the first draft of a piece of writing, otherwise the frequent interruptions (because of their many spelling errors) interfere with their train of thought.(Philomena Ott, Teaching Children with Dyslexia: A Practical Guide. Routledge, 2007) The Lighter Side of Spellcheckers This apology was printed in the Observers For the Record column on March 26, 2006: A paragraph in the article below fell victim to the curse of the electronic spellchecker. Old Mutual became Old Metal, Axa Framlingon became Axe Framlington and Alliance Pimco became Aliens Pico.The Rev. Ian Elston was thinking ahead to Christmas services when his computer spell-checker changed the gifts of the Wise Men to golf, frankincense and myrrh. (Ken Smith, Day of the Dead. HeraldScotland, November 4, 2013)
Wednesday, November 6, 2019
Anti-Federalist Argument essays
Anti-Federalist Argument essays We beat the odds and won a war to gain finally gain control of our land. The formation of our government is now our job as an independent country. Many leaders of our new nation feel its necessary to rush into forming a document to serve as the backbone of our nation. I feel that our government is too young and inexperienced to form a reliable set of laws. Rushing into things would cause things to be overlooked and forgotten. Also if our government were to make such laws without the consent of the people it would be going against everything our country stands for. I believe a poor constitution would fail to preserve the rights and powers of citizens, represent the people in government, grant the states certain rights, establish liberties for men, limit the governments powers and have the ability to change throughout time. The constitution says the government will hold all major powers and it is not up to the citizen to change the countrys method of establishing courts, vote on taxes or decide how to spend funding. The government is too large. All men have unalienable rights and in this new country of ours a simple document shouldnt outline what a citizen can and cannot do. I believe that in this new constitution citizens will not have adequate representation. For example, you cannot a select few people to represent a large state and look out for the best interest of everyone. The representative needs to come from the same background of the people they are representing, understand the citizens beliefs and concerns, but should be well educated enough to know what's possible and best for his people. I believe more middle class representatives would be appropriate because of the fact that they are down to earth and realize what the general public wants/needs. I think the only way to fix the problem of misrepresentation would be to have enough representatives that correspond with the numerous social classes and different t...
Monday, November 4, 2019
Developing Writing Skills Essay Example | Topics and Well Written Essays - 1250 words
Developing Writing Skills - Essay Example My gretest wekness in writing hs lwys been to pln, write, nd revise n essy. In generl I lck bsic knowledge bout how to pproch writing nd the writing process s whole. Prticulrly, I hve difficulty in developing n essy in the following res: () generting content, (b) creting nd orgnizing structure for compositions, (c) formulting gols nd higher plns, (d) quickly nd efficiently executing the mechnicl spects of writing, nd (e) revising text nd reformulting gols. Generting content for n essy typiclly begins with brinstorming. During this pre-writing phse, writers tke time to reflect on their topic, select n udience, nd develop ides. Skilled writing depends, in lrge prt, on student's bility to pln before composing during this phse. My wekness is tht I do not spend much time prepring to write. Insted, I often begin writing s soon s I m given n ssignment with little or no preprtion. Furthermore, I tend to rely on n ssocitive technique wherein I simply write whtever comes to mind. Beginning to write immeditely fter receiving n ssignment does not llow dequte gol setting or plnning--two importnt techniques pplied by successful writers. Subsequently, I pper unsure of wht to do when I m given time to pln. Sometimes I do not regrd strtegies in the prewriting phse s vluble tools nd fil to utilize meningful techniques to become successful writer. I lso experience difficulty when ttempting to generte content nd orgnize structure for compositions. This problem my be ttributed to their under-utiliztion of strtegies for retrieving useful informtion. Thus, sometimes I view writing ssignment s question/nswer tsk involving little preprtion. Formulting gols nd objectives, strtegy tht experienced writers use to pln nd execute higher-level writing skills, is third re of difficulty for me. Writing cn be chrcterized s problem-solving tsk tht includes identifying gols for writing s well s the mens to chieve them. During nd fter writing, these gols re ssessed to determine whether student needs to redefine the gols or continue with the writing process. In my writing strtegy I choose from list of gols tht I feel my pper should ccomplish nd thn I brek the writing tsk into severl prts: () generte product nd process gols, (b) develop notes, (c) orgnize notes, (d) write nd continue the process of plnning, nd (e) evlute success t obtining gols. fter being tught the gol-setting strtegy, I meet the gols I hve set for my essys 90% of the time. My strength in writing is tht I m ble to quickly nd effectively execute the mechnicl spects of writing. Specificlly, in comprison to my peers, I mke considerbly more spelling, cpitliztion, nd punctution errors in compositions, nd my hndwriting is less legible. Bsic skills like spelling, grmmr, nd hndwriting re usully not tught t the high school level. I lso think tht my strength in writing is in formtion sentences. I hve well-developed sense of sentence style nd produce long nd completed sentences. Thus, the repetition of simple sentences nd frequent use of run-on sentences re not common for my style. For exmple, I edit for the conventions of writing s they proceed with composing their ides nd during the post-writing stge for refinement. nother re of difficulty in writing for me is the revision of my writing. The revision process is n
Saturday, November 2, 2019
Econometric Regression Analysis Assignment Example | Topics and Well Written Essays - 500 words
Econometric Regression Analysis - Assignment Example The productivity differed from almost wholly effectual to almost entirely unproductive. Outputs regarded consisted of patient days for three age groups. The two techniques generated similar measurements of efficiencies with a single exclusion. The findings from the translog model would generate a standardizing consequence for economies of scale. Therefore, it means that they are general and consistent returns. The DEA exemplar was capable of recognizing cases of both rising and lowering returns. The lowering was discovered for hospitals with augmented quantities of elderly patients. States with a past of civil disagreement or extensive pervasiveness on HIV/AIDS were less effective than other states. Performance was raised with health spending per capita. The researcher is mainly interested in a substantial research of applied numerical and econometric review. This review should use zonal methodology and demographic exchanges, alongside information gathered from collective three-dimen sional departments of observation. This information is normally influenced by a range of measurement issues, ending in three-dimensional reliance and three-dimensional heterogeneity. Nevertheless, a majority of the scientific work did not succeed in considering this crucial aspect of econometrics. In this article, the researchers have tackled the problem of the level to which three-dimensional impacts in practical regression review. An overview of the official technical issues is provided and associated with the literature in three-dimensional econometrics.
Thursday, October 31, 2019
Leadership and Organizational Behavior in Action Essay
Leadership and Organizational Behavior in Action - Essay Example The firm that is analyzed in the paper is General Electric (GE), a multifarious company, setup by Thomas Alva Edison in the year 1890 by the name Edison General Electric. The company is currently headquartered at Fairfield, Connecticut in the United States and has made several breakthroughs in segments of Energy, Capital Finance, technology, power generation to name a few. Some of the benchmark innovations of GE include the mars observer, launching of CNBC news channel for business reporting in real time, GE Money which provides customers with facilities of a general credit card and at the same time the facilities of a store card with discounts and promotional offers. Such innovations have helped GE scale the position that it holds today. GE has been continuously emerging as a champion when it comes to innovation. Its businesses related to infrastructure have proven to be another step towards building a better future. GE is currently operating across many regions of all the inhabited continents of the world. GE has been a pioneer for the past 130 years and strived hard towards innovation. Since the invention of first light bulb to the present jet engines the company has come a long way in making the world a better place to live. The company which is an equal opportunity employer has a strong presence in many countries and proudly supports a diverse workforce. The company believes in fair treatment policy and has formed various forums to nurture people with differences in age, ethnicity, gender, sexual orientation etc. (GE, ââ¬Å"Our Companyâ⬠). This project report deals with organizational challenge of workforce diversity. Maintaining a large workforce brings along challenges and people from different background may not be able to adjust well with each other. Objectives As GE supports a diverse workforce, managers will be faced with the challenges of combating discrimination within the workforce and at the same time promoting alliances and inclusiveness i n the group. Negative attitudes and behaviors may influence decision making and might also result in a loss of productivity as well as personnel. If negative behavior or prejudices creeps up within the workplace it will affect the companyââ¬â¢s image and may also lead to litigation. The same is the case with multiculturalism. Multiculturalism may be defined as the process whereby people from different cultural background are motivated to work as a unit and also motivated to achieve the common goals of the organisation. The objectives of this report are to make careful assessment of the situation. The report will identify the desired course of action for GE which will help them to overcome the situation. This would require the involvement of all the groups. Managers will have to work on removing personal bias and should also create ways for engaging in personal dialogues with teammates. Managers need to clearly understand that the recipe for success is teamwork and the approach sh ould be unique to the organization for resolving the dispute. Secondary resources have been used for doing the analysis and collecting evidences. Literature review Multiculturalism is the apprehension which epitomizes a new way of acclimatizing to the future world. It is the process of recognizing and respecting different diversified groups with different cultural background in an organization. The people with divergent socio-cultural class are addressed and motivated and are eventually accredited for bringing stability within the organization (Rosado 1-4). Multiculturalism has long been a sensitive issue, a never ending debate, measure of its efficacy in an organization or in the society has come under scanner. These questions or issues have been creeping over time and again to understand the need of multiculturalism, its
Tuesday, October 29, 2019
Red, White, and Black by Gary Nash Essay Example for Free
Red, White, and Black by Gary Nash Essay Gary Nash author of Red, White, and Black purpose to their readers is describing the early colonists, but also the relationships toward Europeans, the Indians, and the Africans. Nash successfully analyzes the impact of the colliding three cultures and interprets them to give an overall theme about the relationships between those who made America what it is today. He has shown another point of view to his reader that we grew up and was raise in a white people land; learning only the White people point of view through history. His purpose of writing Red, White Black was to prove that Native Americans and Africans were not victims, but played as a active role to American history. Nash major theme that he covers in his book was about the three cultures in America and to interpret them overall. The theme is about the issue that Americans have towards the Native American and Africans. He wanted to examine and studied other culture history instead of only learning from the American side. He figures out that they were victims to the history and was just a role in the American history. His main point of time frame was from 1492-1796. The introduction to Nash research took place in Eastern and Northern America. Nash was against how the founding fathers came to America and affected the Natives and Africans. He was against how the founding fathers came to their land and changed their destiny of lives and culture because they took what belong to them first. Anthropologists call this process ââ¬Å"transculturationâ⬠and historians call it ââ¬Å"Social change. â⬠His argument towards the historical terms is that we are studying a dynamic process of interaction that shaped the history of American Indians, Europeans, and Africans in the North America in the 17 18 centuries. Gary B. Nash was arguing of something different than what is written to us. He believes of what the founding father want us to know and was marked down through history. But reality during those times American Indians and Africans had a big destiny change when the European came along. They changed and affected their lives in there home land. Gary B. Nash written Red, White, and Black purpose was mainly to let people know that, whatââ¬â¢s ever that was passed down from the founding father in history is only what their views were and marked down in papers. How the Americans European changed the lives of all Native American and African that was located at Eastern and Northern America.
Sunday, October 27, 2019
Concrete: Advantages And Disadvantages
Concrete: Advantages And Disadvantages In this era which we live in, there are more than 7 billion (1) people on Earth and its resources are limited and quickly depleting. As a response to this high demand and burden on the Earths precious goods, there has been a green movement. Governments and companies are implementing laws and constantly looking for ways to be more efficient and conserve whatever little we have at our disposal. In the light of all this innovative research and as university students studying environmental engineering, concrete evolution has sparked our interest. Concrete is very much a large part of the environment, being one of the most widely used materials in construction, concrete is virtually everywhere. Its high durability and versatility has made it superior to all other building materials however there are some downsides to concrete that has made it a threat to the environment, mainly the greenhouse gas emissions that come with making cement. The cement manufacturing industry is under increasing pressure to reduce these emissions due to the fact that it releases a lot of gases, namely carbon dioxide and nitrogen oxide. The real struggle is to find ways to produce a concrete that is environmentally safe, without losing the integrity of the concretes durability and reliability. In this paper, the making of concrete and its advantages and disadvantages will be discussed, alongside some different alternatives that have been implemented at present time to deal with energy efficiency and environmental security. Economic and social effects are also looked at and discussed. The main alternatives in focus are; the use of chemical admixtures, recycled concrete materials and fuel alternatives for the kiln. Kiln and Efficiency The most energy consuming part of the cement making process is the burning of the mixture of the constituent parts of cement within the kiln. A large amount of emissions is released by the fossil fuels used to heat the kiln up and the chemical reactions that take place within the kiln itself. A kiln is a thermally insulated chamber or oven, in which a controlled temperature is maintained and kilns used for making cement get to temperatures of about 1500 degrees Celsius (2). In order to get to these temperatures, large quantities of coal are burned to generate the energy needed for the kiln. Coal is the primary fuel burned in cement kilns, however, the use of alternative fuels in cement kilns is now common and increasing. This high energy consumption however leads to high carbon emissions, about 7% of the worlds total carbon emissions. Cement production is an energy-intensive process consuming thermal energy of the order of 3.3 GJ/tonne of clinker produced. Electrical energy consumption is about 90 120 kWh/tonne of cement.(3) These are the reasons why more efficient fuel alternatives are being investigated to firstly help improve the quality of air we breathe and secondly protect the earth from adverse conditions that come with too much carbon dioxide in the atmosphere. There are two types of kilns being put to use, one utilizing a wet process and the other dry. The wet process is the older method and involves a slurry mixture of water and the cement ingredients being transferred to the kiln. The wet process however uses a lot of energy and therefore the modern dry process is more commonly used. It uses the dry ingredients blended together and then transferred to the kiln, the only disadvantage it that a lot of dust is released. Both diagrams below will illustrate the the cement making process and more importantly the two different kinds of kilns. Material Science According to the Merriam-Webster dictionary, material science is the scientific study of the properties and applications of materials of construction or manufacture (as ceramics, metals, polymers, and composites).(5) The concise encyclopedia further explains how material science goes into how the properties of different materials depend on their composition such as atomic mass and electron configuration.(5) It also points out the importance of material science to engineers of all disciplines as they need to know as much as possible about different materials in order to come up with designs and fix problems in their respective fields. With a sound knowledge of materials and their properties, they can be manipulated in any way necessary to be an asset to us. In our case, understanding the chemical reactions that take place in concrete will help to understand why the methods chosen have been picked in the first place to help rectify any problems. From the manufacturing of the cement in the kiln to the demolition of concrete structures, knowing and understanding the reason behind different aspects surrounding the whole concrete process is very beneficial in finding alternatives to make it more environmentally safe and efficient. Alternative Fuels Fossil fuels, such as coal and natural gas, have been used as energy sources in the cement manufacturing industry for decades. In more recent years, these traditional fuel sources have become increasingly substituted with alternative fuels typically of waste sources such as municipal solid waste, scrap tires, waste wood, agricultural biomass, meat and bone meal, and petroleum coke. The list of candidate materials is continuously expanding and regulatory pressures, economic factors and the fact that we are running out of landfill space are all reasons why these alternative fuels are continuously sought for and studied. Alternative fuels used today in cement manufacturing and the different potential alternative fuels differ considerably from the traditional fuels, and the cement manufacturing industry is faced with several challenges in making the switch from traditional to alternative fuels. Some of these challenges include, inadequate heat distribution, blockages in the preheater cyclones, unstable precalciner function, higher SO2, NOx, and CO emissions, congestion in the kiln riser ducts and dusty kilns (6). Furthermore, due to the fact that the cement industry is strictly regulated by national and international legislation for environmental related issues, health and safety of practices, and the quality of cement produced, special approval is required for the use alternative fuel since they all different and can potentially introduce harmful environmental effects or affect the quality of the cement. The type of combustion implemented, which is determined by the type of fuel used can have a direc t affect on the composition and characteristics of the output product, and the function of the kiln as different manufacturing plants may differ in their design. A common practice in cement manufacture is the addition of the ash produced by the fuels, which are comprised of compounds containing silica and alumina, into the clinker (6). The composition of the fuel ash created by different fuels can determine in which proportions an alternative fuel can substitute a conventional fuel, for example some can yield silica rich fuel ash which can later reduce the amount of ground sand needed as a raw material to make cement. Moreover, the inclusion of constituents that can have a deleterious effect on concrete performance must be controlled, since this can happen even at very small concentrations. An example of this would be alkalis such as potassium oxide and sodium oxide, which can in the presence of moisture can cause reactions in concrete called ACR and ASR which can cause cracking in the structure. These alkalis can also react with SO3 to form alkali sulphates, which can affect the reactivity of the cement with aggregates, resulting in hardenin g problems (6). Therefore, the inclusion of alkalis from the kiln system should be minimized. In certain kilns that have preheaters, the use of alternative fuels can lead to the volatilization of certain molecules they introduce, which can lead to their subsequent recirculation in increasingly higher loads. Their recirculating can lead to their condensation in cooler areas, binding to circulating dust particles and can potentially cause blockages, thereby affecting the heat-exchange system. Some of these molecules are sodium oxide, potassium oxide, alkali sulphates, and chlorine, which not only are responsible for deposits, preheater blockages, and kiln rings but can also affect the quality of the cement produced if they are retained to some proportions(6). Petroleum coke or petcoke is a solid residue from the crude oil refineries. It is considered a low volatile fuel with a typical volatile content of 5-15 %. The fact that its volatile content is low means that it has a low reactivity / burning rate and therefore is not possible to burn 100% petcoke in kiln or precalciner without using other high volatile fuels along with it (6). Consequently, this alternative fuel requires finer grinding and is pushing new kiln designs into the market to allow for their complete burning. Another negative is the fact that it has a high sulphur and vanadium content. This can result in increasing the sulphur circulation in the kiln and precalciners and as mentioned before causing build-ups and blockages, and increasing sulphur dioxide emissions. Sulphur contamination of the cement can cause cracking and high vanadium content can cause reduce the strength of concrete (6). A 0.2 percent addition is reported to lead to a 10 percent reduction in 28-day stren gth of cement. However, due to low ash content of petcoke such high contents of vanadium in cement are unlikely (6). This is an attractive fuel as it has a high calorific content and relatively less expensive than coal and other fossil fuel conventionally used. Sewage Sludge is generated from wastewater treatment from industrial, residential, commercial, and institutional sources. Sewage sludge is usually disposed of by throwing it in the sea, its use as fertilizer, its incineration, or it is dumped in a landfill. Due to stricter environmental specifications associated with its disposal, the possible health and environmental risks in using it as a fertilizer and the increasing cost for its disposal in landfills, its use as an alternative fuel in cement manufacture is becoming more attractive. The organic components of the sludge are entirely destroyed when it is burned as fuel and the inorganic components and heavy metals are combined and included in the final product. The sulphur content of sludge is not greater than coal so it does not pose a major concern in comparison, and although it has higher nitrogen content the nitrogen oxide emissions are lower than when fossil fuels are burned (7). However, there are higher contents of volatile c ontent, ash, and low fixed carbon compared to coals. Sludge usually requires pretreatment before it can be used as a fuel and has to be burned in controlled conditions as with most alternative fuels. Using sludge is also attractive economically, as it resulted in an increase in return when used instead of fossil fuels, in spite of its lower energy content than coal and the fact that it needs to be stored in special silos in order to avoid contamination (7). Its storage and handling and reduction of water content are the most difficult part of its use as a fuel, however it is definitely a far better option than use of non-renewable resources since it is widely available and a nuisance to dispose of. The use of sludge as a fuel source cannot have much of a social impact other than perhaps peoples perception of it, some may regard it as a better option than incinerating sludge which forms poisonous by-products, while others may be bothered by its use in anything else. Scrap tires have become utilized as an alternative source of fuel for various parts of the developed world instead of fossil fuels in many industries including cement manufacture. When tires are burned the rubber is completely destroyed and the inorganic component and heavy metals are included in the cement product. Different cases present different conclusions about the emission of SO2 and NOx, which may suggest that it depends on the kiln system and the burning process implemented. However, two Portland Cement Association (PCA) reports (2008, 2009) found that nitrogen oxide, sulphur oxide, and particulate emissions were reduced when scrap tires substituted a portion of the conventional fuels (7). Heavy metal, dioxins and furan emissions showed different results in different studies however, again Portland Cement Association studies collected data from 31 cement plants that used tire as fuel and found a significant reduction in the emissions of dioxins and furans (7) . Some problems with tire derived fuel is incomplete combustion and zinc oxide present at concentrations that may be detrimental to the quality of the cement. Overall, the use of tires as fuel is an environmentally, and economically sound option compared to other end-of life alternatives of tires and the use of 100% fossil fuel. Tires have a higher energy content than coal and allow for savings in the purchase of coal. Another source of fuel being used is agricultural biomass, which includes all forms of biomass not included in the categories of meat and bone meal, or sewage sludge. Some common sources are rice and coffee bean husks, palm kernels, algae, and cottonseed oils. The use of agricultural biomass has been proven to be an effective way to reduce greenhouse gases and the dependency for fossil fuel (7). Furthermore, its been determined to have low SO2 emissions, low dioxin and furan emissions, and very low heavy metal emissions. Biomass in the form of waste from industrial or agricultural processes is less expensive than fossil fuels, and therefore its use would reduce operational costs. However, equipment specific to the processing of biomass may be needed and may incur additional costs. Also, supply seems to be a major concern, a continuous supply may be difficult to achieve. Socially it can be beneficial to some agricultural communities, allowing them to make an additional income from sel ling their agricultural by-products (7). Finally the last alternative fuel to be discussed is the meat and bone meal (MBM), a by-product of the rendering and food industries. Their co-incineration with fossil fuels in cement kiln systems has become a common way for their elimination. MBM has a lower fixed carbon and high ash content and high levels of phosphate, sodium, potassium, magnesium and chlorine (7). Due to the fact that chlorides can volatilize and condense at high temperatures in the kiln and can react with alkalis and sulphates to form compounds with low melting points, which can lead to their recirculation and condensation. As mentioned earlier this can can have harmful effects on the production process and cement produced . Consequently the MBM used as substituted fuel and the compounds introduced into the cement needs to be controlled and monitored. The sulphur content, on the other hand, is a little lower than can be found in coal, and the high calcium content in MBM can help retain most of the SO2 released f rom its combustion (7). The use of MBM in cement production reduces CO2 emissions, SO2 emissions, and introduces a safe and environmentally friendly way to disposing of them. And as with the previous alternative fuels mentioned, it reduces the demand for landfills and their associated environmental and health risks. In summary the cement kiln provides numerous advantages over other end-of life alternatives for much of these wastes. The high temperatures, oxygen rich environment, and adequate residence time provided by the kiln system allows for the complete destruction of the organic material. Also, aside from being able to process a wide range of waste materials, since the ash is incorporated into the final product there is no additional waste to manage from the use of these wastes. However, these alternative fuels are derived from selected waste streams and usually require some level of pretreatment, such as the shredding of tires, drying of sewage sludge and reducing its pathogen levels, etc. This is a extra investment of time and money that the cement manufacturers will need to take on as the pretreatment of these wastes is an integral part of their recovery and in most cases is taken care of externally by waste treatment experts or outside suppliers. Despite, these extra costs for the prepr ocessing of these wastes, the cement manufacturers are expected to make a larger return on this investment in comparison to the purchase of fossil fuels. Also, the use of these wastes as fuels would create a market for these them in neighboring communities, which will help reduce the number of operating landfills and put to use the calorific value in these wastes rather than have them wasted. The burning of carbon neutral wastes which include agricultural biomass, municipal waste, animal waste and paper waste are considered as GHG sinks since they would otherwise decay in landfills and form methane which is a more harmful GHG than CO2 (8). Other wastes that are derived from fossil fuels such as tires, are not carbon neutral, however burning them in cement kilns rather than incinerating them, which also induces GHG emissions, can result in significant CO2 reductions. Although the kiln emerging technologies and their capacities to process these fuels was not discussed, since it is too broad of a subject to cover and is not the main purpose of this paper, it is understood that some alterations to tradition kiln systems is required to adapt to the different combustion of these fuels. An example of these changes is features such as a multi-channel burner design and thermograph systems which allow for the control of the flame and optimize burning of different fuels (10). There are also different mathematical models, which look at which combination of alternative fuels in which proportions can produce optimal burning conditions (11). There has been much progress over the years in the substitution of fossil fuels in cement kilns, especially in the EU where substitution rates are much higher than in North America, however, there is much more work that needs to be done in the evolution of the cement industry towards greener and more sustainable practices. Advanced Chemical Admixtures Our society relies greatly on building materials, concrete being one of the oldest, and most important of those materials. Concrete is a combination of 60% to 75% aggregates and 25% to 40% paste. The paste is comprised of 7% to 15% cement, 4% to 8% of air content, and 14% to 21% water (15). Although paste only contribute less than 40% of concrete, the components greatly affects the overall quality. An example is with the reduction of water to cement ratio, and in turn increases the compressive and flexural strength, increases resistance to weathering reduces shrinkage and cracking, and lowers permeability. To achieve these characteristics in concrete, engineers came up with admixtures, an important ingredients used when the goals are to reduce the cost of concrete, maintaining the quality of concrete during the different stages of its production, basically to achieve desirable properties of concrete. Admixtures are classified under the following; Air-entraining mixtures, water reduci ng admixtures, plasticizers, accelerating admixtures, retarding admixtures, corrosion inhibitors, etc. Superplasticiser/High range water reduction is made up of synthetic polymers, which are admixtures that increase slump flow, essentially used for low to normal slump and water-cement ratio. The use of superplascticiser not only brings the water-cement ratio down, but it drastically increases the workability, as well as increasing the strength at an early stage up to 200% within 16 hrs (13) . A great example of a new and innovative plasticizing admixture is Glenium SKY. The third generation high range water reducer or superplasticizer also known as Glenium was introduced in the 1990s. Glenium is a polycarboxylic ether polymer, that attracts entrringite molecules, through a static electric charge. This entrringite provides a protective barrier around the surface of cement particle, which prevents hydration and crystallization. In September 2003 Glenium SKY (Synthesis of Key performance and Yield) was introduced. This new superplasticizer was developed for ready mixed concrete, concrete that contains high performance quality from the production to the usage. Unlike the other types of Glenium; Glenium 21 and Glenium 27 , Figure 1 Glenium SKY, new chemical monomers controls the rate in which the entrringite molecules cover the cement molecules. Therefore the cement molecules are not completely covered, which allows the crystallization to take place at a slower rate, and accelerated strength at an early stage without compromising the consistency. Glenium SKY was tested against Glenium 27, it is noticeable from the table below that Glenium needing less water and lower cement-water ratio, but still was a able to produce a more consistent slump and greater strength according to the test results in table 1. Within 90 min, the slump dropped only by 2 mm. The usage of Glenium SKY benefits socially, economically, and environmentally. With the increase in workability, decrease in water-cement ratio, and high early strength, allows the most optimum concrete design which in turns have a positive effect on the economical aspect The definition of sustainability means to meet the needs of the present generation without compromising the ability of the future generations to meet their need (15). Sustainability is achieved when these 3 factors are properly balanced, economy, social, and environmental. It is evident that the addition of the superplasticiser used in concrete mix designs will help to achieve environmental sustainability. The concrete industrys main goal is to produce a superior material with a positive impact to the environment. This super-plasticiser or high range water reducer will decrease the water-cemnet ratio, meaning less cement needed as well as water. Water usage can be reduced from 10% to over 30%. A 10% reduction is equivalent to 600 000 tonnes of water saved annually (14). Not only are the usage of water is reduced but also other environmental factors. Analyzing the effects of the super-plasticiser shows a generally positive effect on the environment. Figures 3 and 4, shows 2 concrete structures impact on the environment with the addition of super-plasticiser in relation with the structures without the admixture. For the flat Slab concrete, adding the super-plasticiser admixture decreases these negative impacts by a great margin. It is evident that the total energy requirement is reduced by 8%, the toxic impact on human health is reduced by 10 %, the acidifying pollutants is reduced by 8%, and the CO2 is reduced to almost 20%. However, using this admixture, there is an increase in chemical waste, the values have been normalized to 100% for the control, which means the increase of the non-hazardous chemical wastes will only increase by 1% (13). Overall for this cement mix the superplasticier admixture is beneficial because it decreases major negative impacts such as abiotic depletion and eootox sediment by 3% and another 3 categorie s by over 10%. The effect of the admixtures vary depending on the different type of mixes and their purpose. The concrete mix for a precast wall unit was also analyzed using these admixtures. Based on that analysis we can conclude that this admixture has the desired effect by decreasing the energy by 10% by volume of concrete. As with the previous concrete mix the superplasticiser has a greater impact on a number of impacts. While there is an increase in chemical waste by 10% by volume of control concrete the decrease in energy is of 20%. This outweighs the negative of this admixture. Overall the super-plasticiser admixture has a great effect on a number of impacts but also a negative impact on chemical waste. Figure 3 and 4 compare the strength with and without the admixture versus the energy and climate change. It is evident that the super-plasticiser are effective in reducing the CO2 emissions and the energy consumption. A cement mix with this superplasticiser admixture will have a positive overall effect and has very beneficial impact on the environment. The use of this super-plasticiser admixture in concrete mixes allows for social sustainability. As previously stated before, with the addition of this admixture, concrete mix can be made to have a higher strength. An increase in the strength of the concrete will result in a more durable material, and a longer life expectancy. With concrete having higher strength and a longer life, maintaining these structures will be reduced especially within major highways and roadways within a city. Traffic congestions greatly impacts our lives, career, and safety. By reducing the amount of traffic will allow a better quality of life. In central Ontario alone, there are 11 zones where major structures are being repaired and maintained. On the Queen Elizabeth Way (QEW) near Hamilton, a $7.3 million dollar contract has been approved for the structural rehabilitation (14). According to the traffic reports, the QEW Burlington Skyway Bridge, the Millen and Fifty Road structures and glover road will be u nder construction, which means a delay up to 30 minutes (14). The 30 minute construction delay with the addition of bottlenecked areas, and overcrowded vehicles can increase the delay to be even longer than 30 minutes. Lets say 30 minutes delay for construction, and because of a large amount of the population commute to the city of Toronto for work, another 10 minutes due to vehicles overcrowding the roads. We have a total of 40 minutes delay, and a total of 80 minutes delay a day, which comes up to 6400 minutes or 106.6 hours in traffic until this specific project is completed in 4 months. These delays will cause people to be late for work, school, or other commitments, which can lead to stress, and road safety. By producing an optimal concrete design using a super-plasticiser such as Glenium SKY, we can increase the strength and life expectancy of the structure, which will reduce traffic caused by maintenance and repair, and create a more socially sustainable environment. Reaching economic sustainability is just as important as social and environmental sustainability. With the increase in workability, decrease in water-cement ratio, and high early strength, allows the most optimum concrete design which in turns will help to achieve economical sustainability. The increase in workability allows proper installation into areas of low clearance, underwater placements, and areas where consolidating methods cannot be used. Which means savings on equipment, transportation, and time. When mix designing, with the addition of Glenium SKY admixture, the water-cement ratio is decreased, which results in a smaller amount of water and cement needed. Economically, this is a positive result, not only does it reduce the cost of the amount of cement needed it also reduces energy cost. According to the Ministry of Transportation, Ontario is increasing driver and vehicle fees in order to maintain bridges and roads. The price of maintenance has increased. Consequently this increases taxes and other fees. Using this admixture the amount of maintenance required can be reduced, with increase in tax will not be necessary. Recycled Concrete Concrete as one of the mostly used building materials when produced and transported creates a lot of CO2 and when disposed generates a huge amount of waste; therefore it causes a lot of concerns for environmental activists. In order to address these environmental issues, it is necessary to recycle the concrete when demolishing buildings built using concrete. Also reuse of this construction waste is important in terms of life Cycle Assessment that is the standard method of evaluating environmental impacts associated with different stage of products life, which includes recycling (22). There are 3 basic concepts to promote the proper reuse of the construction waste, (A) assurance of safety and quality, (B) decrease of environmental impact, and (C) increase of cost effectiveness of construction. In this paper we focus on some benefits of proper recycling of concrete for the environment. First, we are going to address some of the main environmental problems with concrete. Concrete production emits huge amount of CO2, which is the main issue of this industry that leads into global warming. Up to 8% of all the CO2 produced in the world comes from concrete production. Using recycled concrete can dramatically reduce the amount of emitted CO2 and fight against global warming. Nitrous oxide emission and other articulated air emissions on one hand, and on the other hand the traffic congestion caused by delivery of the ready concrete wastes a lot of energy and cause air pollution. Water pollution and adverse effects of concrete on health are among the other problems that make concrete recycling more essential. (19) In the past, the resulting concrete from demolishing the buildings was released in the environment which had enormous negative impacts. Conventionally recycling concrete has been considered as a difficult task, however recycling technology has been improved and now it has become a feasible technology. Recycling concrete has become a simple process that involves breaking the concrete pavements, removing them from the sites to the recycling machines that can be also installed near the construction sites and finally crushing the concrete into pieces that can vary in quality and size. (18) Furthermore, recycling technology has reached the stage that can prepare the recycled concrete to produce superior recycled aggregate for structural concrete. Recycled concrete has become one of the best construction materials as it is stronger than new concrete. There are only few restrictions on the type of concrete that can be used as recycled concrete aggregates (RCA) (20). Recycling now has become more common method of developing the waste produced by demolishing or renovating the structures made of concrete rather than transferring them by truck and leaving them in landfill. Environmental awareness and also the desire of contractors to keep construction costs as low as possible, has made concrete recycling an attractive proposal in any construction project involving concrete. Unlike most of the materials, such as, glass, bottles or metals that can be reused to produce the same material, once concrete has been made from cement, it cannot be decomposed to its initial component of sand, cement and water. However, Crushed concrete can be combined with virgin aggregate in producing concrete. (17) It is important to develop standardized guidelines to create new materials. These standards are needed for quality control of Recycled Concrete Aggregate (RCA), and the correct use of this recycled materials to produce new concrete. Recycling can reduce the amount of waste concrete that must be landfilled so it saves landfill space by keeping the waste concrete out of landfill. In addition, it reduces the need of virgin aggregates which help to cuts the negative environmental issues of extraction process. Recycled concrete can be used as gravel and it reduces the need for gravel mining. Another positive impact of recycling is the reduction of transportation requirements to transfer the new material to the construction sites, which in turn can reduce air and water pollution significantly and also decrease the greenhouse emission. One of the most important environmental advantages of concrete recycling rather than leaving the concrete in the landfill and buying the new material is to save up to 1,360 gallons water by recycling one ton of concrete. Using developed recycling system, to recycle the concrete waste produced from demolishing structures or roadways, can reduce t
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