Nelson Mandela Essay Example for Free

Nelson Mandela Essay Nelson Mandela was a man of honor. A man who sacrificed his life for the betterment of others. He was born July 18, 1918 in South Africa. He grew up in a segregated country. He later became an activist against apartheid. He protested and paraded the country. He got arrested and spends the next 27 years in prison. He still did not give up the fight against apartheid. After getting out of prison he became the first democratic elected president of South Africa from 1991 to 1997. After his presidency he created several nonprofit organizations to help and make South Africa better. Nelson Mandela was a man who doesnt care what people say or think about him. He always does what he thinks is right even when the majority disagrees with him he still goes on doing what he thinks is best. When he started fighting to end apartheid, he knew that he was sacrificing his life. He knew that his life was shortened. That death was near, but he doesnt care because he knows that his sacrifice will pay off eventually. Nelson Mandela was born in South Africa. All through his childhood, living in South Africa as a black man was brutal because of the apartheid. There was different school for black children. Restaurants were segregated, maids were used as slaves. Growing up, the rule at that time was that at 6 pm, a siren would sound, which meant that no black people were allowed on the streets after that time. If they are caught by the police they had to show prove of identity. If they couldn’t produce this, they were arrested and put in jail. Black South Africans owned noting during that era. No houses, no cars and they weren’t allowed to have accounts of any kind. Even at the mall there were different bathrooms for white people. Park benches were segregated public water fountains were segregated. Almost everything starting from the public transit to owning an apartment was separated between whites and blacks in South Africa. In 1961, Nelson Mandela became leader of the armed wing branch of government. He protested all over the country, sabotaging the apartheid government. Since the non-violent way of trying to end apartheid is not working, he devices a plan which call to destroying several government buildings. Such as, the post office, the police station and other government offices. It worked great until citizens started getting killed in the buildings. The police arrested him on numerous occasions, with no solid evidence they let him go. Finally they arrested him for treason and sabotaging the government. After getting arrested he was sentenced to 27years in prison. In the winter of 1964, Nelson Mandela arrived on Robben Island where he would spend 18 years of his 27 years prison sentence. Put in a small cell, with no bed, just a bucket for a toilet, he was forced to do hard labor in a quarry. He was granted one visitor a year for 30 minutes. He could write and receive one letter every six months. But Robben Island became the place, which transformed him. Through his intelligence, charm and relentless pursuit, Mandela eventually controlled even the most brutal prison officers to his will. He gained leadership over his prison mates and became the head of his own prison.

Nathaniel Hawthorne :: essays research papers

Nathaniel Hawthorne The 19th century had many great achievements happen within its 100-year time period. From the building of the Erie Canal, to the steel plow being invented. From the invention of the telegraph, to Thomas Edison creating the first light bulb. While all of these inventions have stood the test of time, one has lasted just as long; the inspiring tales a novel written by Nathaniel Hawthorne. Nathaniel Hawthorne was born in Salem, Massachusetts, in 1804. His name by birth was Nathaniel Hawthorne. He added the w to his name when he began to sign his stories. ("Nathaniel Hawthorne" American Writers II) One of Hawthorne’s ancestors was actually a judge in the Salem witch trials. The guilt and shame Hawthorne felt of his ancestors were included in some of his stories. (McGraw Hill, pg.67) Hawthorne’s father was a sea captain. He died of fever when Hawthorne was only four. Shortly after his father’s death, his mother was forced to move her three children into her parent’s home and then into her brother’s home in Maine. Hawthorne’s childhood was not particularly abnormal, as many famous authors have claimed to have. Hawthorne attended Bowdoin College and graduated after four years. After graduation, he returned to Salem. Contrary to his family’s expectations, Hawthorne did not begin to read law or enter business, rather he moved into his mother’s house to turn himself into a writer. Hawthorne wrote his mother, "I do not want to be a doctor and live by men’s diseases, nor a minister to live by their sins, nor a lawyer and live by their quarrels. So, I don’t see that there is anything left for me but to be an author." (" American Writers II, pg. 227) For the next twelve years Hawthorne lived in his mother’s house. He Seldemly went out except late at night, or when going to another city. " I had read endlessly all sorts of good and good for nothing boo ks, and in dearth of other employment, had early begun to scribble sketches and stories, most of which I burned." Reflected Hawthorne. (McGraw Hill, pg.68) Hawthorne’s first novel, Fanshawe, was published anonymously in 1828 at his own expense. Because of a lack of sales, Hawthorne recalled every copy he could find of the book and destroyed them. When a local printer delayed publishing his Seven Tales of My Native Land, Hawthorne withdrew the manuscript and burned it " in a mood half-savage, half-despairing.

Growing telecommunication in society Essay

It is clear that growing telecommunication will help increase the effectiveness of business. Some consulting companies can do not need to hire office, to buy expensive equipment. People can stay at home to do your business. they don’t need to strictly come to the office. This is much more convenient than ever before. However life is harder. People both yough and old seem to stick to their computer all the time for their work or and for their entertainment. It is true that there are so many things in a computer. People can explore a lot of things. They can easily contact with a friend far away by email, they can know what is happening and even they can go to the market though Internet and there are many other services in the Internet that I cannot count. But the problem is that some people are now addicted to computers and they lose other habits in life. People become stricter because face to face communication is increasingly dwindling. They spend less time to enjoy the beauty of the nature which is very beautiful with alive scenes with sunshine, with fresh air and a variety of things. As a result, human emotion is also reducing. People are not developed fully in mental and physical strength. In addition, as shown recently by research of scientists , sitting in front of computers for long time will affect people’ health. The eye is seriously affected. The number of myopic people is increasing. Sitting in a place also makes people feel tired and stressed. Beside, the whole society seem to be running in a strict mechanism which is facilitated by the computer system. If there appear a problem, this system will collapse rapidly. It can be easily seen many cases of computer hacking which cause great damage to the society and business, for example the virus † love† , originated in the Philippines caused great damage on the global scale in the United States and in south east Asia. The power of the damage is very strong.

The Etiology of Intellectual Disabilities and Autism

Genetics seems to be an important factor, as the sibling rate for the core syndrome falls at about 5% while the autism spectrum disorder is probably around Twin studies have shown concordance rates of 60-89% in minimization twins and under 5% in dogmatic twins, which suggests a heritability of close to 100% in cases that aren't affiliated with specific medical disorders(Gilbert). Some aberrant or variant genes may yet be implicated, examples including neurologist and glutamate genes(Gilbert). It is likely that there is a large mount of genes, more than 30, involved in the increase of susceptibility for autism spectrum disorders(Gilbert). T is now known that defined mutations, genetic syndromes, and De novo copy number variations (primarily deletions) make up 10-20% of Autism Spectrum Disorders(l_cavalier). Proportional portions of the brain are also often dysfunctional in autism and abnormalities in the in the magical and cerebellum are often present(Gilbert). In addition, unchalleng eable is over-represented in autism, more specifically in those with IIS succeeding 70(Glibber). Other abnormalities include hypothermia's in the blood, dopamine and endorphin dysfunction, and excess of gall fritillary acidic protein in the cerebration's fluid(Gibber).Without any known genetic predisposition certain acquired brain lesions can cause autism, although some studies indicate interaction with autism susceptibility genes may be occurring. It is difficult to say what can be done to prevent autism(Gilbert). No known drugs are known to have a substantial effect on the outcome of autism and despite what Jenny McCarthy pushes, vaccinations do not cause autism. Until the causes of autism are discovered it is unlikely we will ever know for a certainty how to prevent it.People with autism are often no stranger to neurophysiology deficits, more specifically executive function deficits. Some of these executive function deficits include poor planning ability, low motivational level, difficulty with time concepts, difficulty â€Å"maintaining†, difficulties with empathy, difficulty grasping the â€Å"theory of mind†, decreased drive for central coherence(Gilbert). People given a diagnosis of childhood autism also fall into the low range of IQ, at below 80(Glibber). Those with Speaker's Syndrome usually boast an IQ above that typically seen in autism, usually above 70(Glibber).The etiology of intellectual disability is also difficult to pinpoint, due to the fact that in approximately half the cases of intellectual disability the cause is unknown (McDermott). The etiology is defined as † a multicultural construct composed of four categories of risk factors; biomedical, social, behavioral and educational, that exist across time, including the across the life of the individual and across generations from parent to Genetic actors such as those associated with Down Syndrome can be highly associated but not necessarily viewed as casual (McDermott).A lgorithms have been suggested for the evaluation of the individuals relying on family history, physical findings, and neurological functioning (McDermott). Some diagnostic techniques include chromosome micro-dissection, fluorescence in situ habitations and more. Other potential causes include telemetric rearrangements/chromosomal anomalies for different forms of intellectual disabilities (often Down Syndrome), tourism in 95% of the cases of DownSyndrome, mutations in sex-linked single genes in Fragile X/Williams Syndrome/ Parade-Will Syndrome, neural tube defects in spinal biffed, head trauma later in life, and many (McDermott). Mothers and newborns should avoid infections, head trauma, harmful chemical and compounds, alcohol, environmental chemicals and food/drink deprivation in order to prevent intellectual disability(McDermott). Beyond this, much about intellectual disability is unknown and thus, is hard to prevent. 2. Discuss the role of IQ and adaptive behavior in both intellec tual capabilities and autism.Two defining characteristics of autism and intellectual disability are deficits in IQ (not in Espaliers however) and adaptive behavior. The PAP describes adaptive behavior in terms of individual performance in relation to person environment interactions and includes it with social skills and peer acceptance as a component Of social competence(Forthwith-Duffy). Usually, the common definition of mental retardation implies that intelligence and adaptive behavior are distinct and not overlapping constructs(Forthwith- Duffy).Three dimensions of adaptive behavior are expressed by observable, practical, conceptual and social skills(Forthwith-Duffy). For quite some time IQ was the only criterion given consideration in intellectual disability diagnosis(Forthwith-Duffy). Studies have demonstrated that individuals with both intellectual disability and autism demonstrate significantly more impairments in adaptive behavior as opposed to someone with just one(Lacerati ve).Individuals with Autism Spectrum Disorders and those with intellectual disabilities seem to demonstrate different adaptive behavior profiles. Those with intellectual disability demonstrated a â€Å"flat† profile, indicating consistent scores(Lacerative). The autistic groups (verbal and non- verbal respectively), however, had a more scattered score (meaning more variance) with the non verbal group scoring lowest in communication and the verbal group scoring lowest in colonization(l_cavalier). Adaptive behavior scales often undertake adaptive behavior and maladaptive behavior.In the last 20 years there have been many developments in asymmetrically valid adaptive behavior scales, some boasting a reliability of . 90(Forthwith-Duffy). Adaptive behavior is Often defined in terms Of its relationship to cultural expectations and environment. A succinct way of delineating the differences between IQ and adaptive behavior is defining an intelligence test as something that measures p erformance or what an individual â€Å"can do† and adaptive behavior scales report what an individual â€Å"does Duffy).Four categories of intellectual disability are named depending on IQ score. With an IQ of 55-69 the designation is â€Å"mild†, with an IQ of 40-54 the designation is â€Å"moderate†, with an IQ of 25-39 the designation is â€Å"severe† and tit an IQ below 25 the designation is unfortunately, public school data on intellectual disability is unreliable due to intelligence tests not be administered universally (McDermott). It has been recognized for quite some time that an IQ of above 70 is one of the strongest predictors of a good outcome in autism.Individuals who have autism and an IQ of under 70 usually have to attend specialist autism classrooms. People given a diagnosis of childhood autism also tend to end up in the low range of IQ, at below 80(Gilbert). Those with Speaker's Syndrome usually have a Geiger IQ than that typically seen in autism, usually above 70(Gilbert). As I noted before there IQ often determines their classroom environment which determines part of their habits of colonization. In Bear (2004), the author replies to queries by lava. N. Years about various 3. Specs of the education of children with autism and developmental disabilities. In his responses, inferences to constitutional principles, core principles, and public policy can be drawn. What are the constitutional principles, core principles and public policies that might be related to the Bear 2004) replies to the layovers? Describe and explain how they are related to the educational issues discussed in the letters. Beginning in the asses, the disability-rights revolution introduced a new era of public policy, core principles and constitutional principles(Turnbuckle).PARA v. Commonwealth of Pennsylvania and Mills v. D. C. Board of Education guaranteed a right to education. Next, came Wyatt v. Stickiness which guaranteed a right to treatmen t(Turnbuckle). These three cases would prove to be landmarks in the disability-rights revolution, influencing decisions to this very day. This is demonstrated by Donald Bear nicely. According to the Individuals with Disabilities Education Act every child with a disability is promised a â€Å"free and appropriate public education†(Bear 2005).As the most studied and best refined method of teaching for Autism, Applied Behavior Analysis should be indebted to the individual by his constitutional rights. ABA has has 1 well controlled clinical trial as well as 4 other controlled trials. This is combined with the 500 or so studies that have been done on ABA 200 of which had a convincing experimental design(Bear 2005). ABA is the only theology that can promise Autistic persons an approximately 50% chance for an independent adult life(Bear 2005). Unfortunately, very few U.S centers offer effective ABA to children with autism with adequate federal or state agency funding(Bear 2005). In accordance with the Board of Education v. Rowley case which guaranteed disabled individuals the right to a free, appropriate individualized and beneficial education in the least restrictive environment, ABA should be offered at all school with students who are disabled(Turning). In ABA the highest priority is communication skills allowed by social skills, followed by self-care skills and finally, followed by intellectual skills.This order is rarely followed in schools without ABA- The effectiveness of ABA depends on analysis and thus, teachers with minimal training are thereby inadequate(Bear 2005). When individuals are guaranteed an individualized and beneficial education it is more than implied that they receive the most efficacious treatment, which in this case is ABA. Applied Behavior Analysts have been developing language and communication skills in children with severe developmental delays for over 30 years(Bear 2005).

Free Essays on Obedience

Rewards and Punishments Through Obedience and Conformity Throughout history, mankind has been acutely aware of the innate response that comes in the form of obedience. From the impetuous child who acquiesces to the power of an austere mother, to the lackadaisical indifference that Hitler’s SS soldiers exhibited while participating in the massacre of an entire town, obedience strikes in forms that can be as trivial as cleaning one’s room after a stern scolding- to as horrific as following the command to decapitate a Jewish infant. In the essays, â€Å"Opinions and Social Pressure†, by Solomon Asch, and â€Å"The Perils of Obedience†, by Stanley Milgram, two psychologists from separate institutions and times carry out a series of experiments that test obedience and conformity. The results of these experiments proved that while these levels of obedience and conformity vary from one individual to the next, obedience and conformity are directly correlated with Carl Roger’s Humanistic Perspective of rewards and punishment. In a lifetime, an individual will often come across a group that opposes his/her views strongly. Sometimes, this individual will conform to the group’s beliefs- despite whether or not he/she believes in them. Such conformity is an unconscious display of obedience to society, in order to gain approval as a form of reward. In â€Å"Opinions and Social Pressure†, Solomon Asch, a social psychologist at Rutgers University, explains the series of experiments that he conducted in order to test an individual’s ability- or in some cases- inability to conform to contrasting beliefs of a group. In his experiment, a group of seven to nine young men attend what they think is an experiment in visual judgment. They are shown two cards- card A has one long line on it, and card B has the same line paired with two extremely contrasting lines. This group is then told to tell the experimenter which line on card B is the same a... Free Essays on Obedience Free Essays on Obedience Rewards and Punishments Through Obedience and Conformity Throughout history, mankind has been acutely aware of the innate response that comes in the form of obedience. From the impetuous child who acquiesces to the power of an austere mother, to the lackadaisical indifference that Hitler’s SS soldiers exhibited while participating in the massacre of an entire town, obedience strikes in forms that can be as trivial as cleaning one’s room after a stern scolding- to as horrific as following the command to decapitate a Jewish infant. In the essays, â€Å"Opinions and Social Pressure†, by Solomon Asch, and â€Å"The Perils of Obedience†, by Stanley Milgram, two psychologists from separate institutions and times carry out a series of experiments that test obedience and conformity. The results of these experiments proved that while these levels of obedience and conformity vary from one individual to the next, obedience and conformity are directly correlated with Carl Roger’s Humanistic Perspective of rewards and punishment. In a lifetime, an individual will often come across a group that opposes his/her views strongly. Sometimes, this individual will conform to the group’s beliefs- despite whether or not he/she believes in them. Such conformity is an unconscious display of obedience to society, in order to gain approval as a form of reward. In â€Å"Opinions and Social Pressure†, Solomon Asch, a social psychologist at Rutgers University, explains the series of experiments that he conducted in order to test an individual’s ability- or in some cases- inability to conform to contrasting beliefs of a group. In his experiment, a group of seven to nine young men attend what they think is an experiment in visual judgment. They are shown two cards- card A has one long line on it, and card B has the same line paired with two extremely contrasting lines. This group is then told to tell the experimenter which line on card B is the same a...

Aspects of Weston village and HCBD problems

Aspects of Weston village and HCBD problems The ICI chemical plant at Runcorn has been landfilling its unwanted waste by products in the disused quarries in the village of Weston in Cheshire. These by products were the result of the production of a variety of chemical products including polyvinyl chemicals, chlorinated alkanes, chlorinated naphthalene, and many more solvents. However, over the last decade high concentrations of hexachloro-1,3-butadiene (HCBD) have been measured close to and inside a number of residences within close proximity to the site. A major concern is that this chemical is not manufactured commercially, meaning that that the presence must be from the landfill. Further investigation into several boreholes revealed that HCBD vapour concentrations were high. The use of these quarries stopped in the mid 1970’s, thus meaning the site was capped and landscaped to fit back in with the environment around it. HCBD HCBD is a man made chemical, which is colourless, oily and does not dissolve in water. This chemical is toxic to aquatic organism and plants, and tends to accumulate and persist in soils and water. This means that it could have global scale environmental effects. Hexachlorobutadiene occur as a by-product during the chlorinolysis of butane in the production of tetrachloride and tetrachloroethene (Berndt and Mehendale, 1979). These two commodities are manufactured on such a large scale that the amount of HCBD can be produced on industrial demand. Toxicity According to the EPA IRIS report the oral slope factor is 7.8 x10 -2 per mg/kg-day (EPA IRIS, 2002). An oral slope factor is used to estimate the risk of cancer with exposure to a carcinogenic, in this case HCBD was tested. It uses a 95% confidence limit for the increased cancer risk from a lifetime of exposure to HCBD via ingestion or inhalation. This estimation uses the units of mg per substance, kg of body weight, per day. The drinking water unit risk is 2.2 x10 -6 per  µg/L, this means level of HCBD in drinking water where the level is dangerous to consume (EPA IRIS, 2018). The quantitative estimation of the carcinogenic risk from inhalation exposure is 2.2 x10 -5 per  µg/m3. Concerns over HCBD relate to limited toxicological studies that show that this chemical is a probable human carcinogen as well as a systemic toxin, being probable to cause liver damage if exposed to humans. Studies on rats have shown high levels of HCBD to cause kidney cancer, although this has yet to be proven within humans. Kociba et al. (1997) found from studies on the rats, the tumour’s to be located in the urinary, this does not differ for either oral exposure or inhalation. Fish species and crustaceans have been found to be the most sensitive, 96-h LC50 values ranging from 0.032 to 1.2 and 0.09 to approximately 1.7 mg l -1 for crustaceans and fish respectively (Toxic substance profile, 2018). Exposure assessment: CalTOX The purpose of this assessment is to undertake a risk assessment on HCBD through relevant toxicological information and applying a multi-media, fate and toxic assessment model (CalTOX) to the Weston site. This model was developed for the Californian EPA for specific use in assessing the human risk through exposure to organic chemicals in environmental media from contaminated landfill sites (McKone, 1993). This model was created using both Excel/Visual Basic and incorporates a dynamic Level III fugacity model to distribute the chemical into 8 environmental compartments and to determine concentrations in soil, air, water (surface and groundwater) as well as plants/crops. A human risk characterisation pathways model is also incorporated within CalTOX to determine human doses for the various pathways of exposure (McKone, 1993). Pathways The exact quantities of HCBD are unknown, however as part of ICI â€Å"Project Pathway† an assessment into the industrial activity around Weston village. This used borehole data and over 2000 indoor air measurements. This occurred in 1993 and was a voluntary assessment of the legacy of almost 200 years of industry. The aim of the project pathway was to explore whether the industrial activity posed an unacceptable risk to people or the environment (Barnes et al., 2002). The Western Quarries are located on a Triassic sandstone, with a depth of 30m below the surface. The ground water level at the quarry 70m. The last quarrying action stopped in the 1900’s but since then it has been for dispersal of industrial and chemical waste. The data provided from the initial assessment, such as geology, contaminants, migration pathway and sources, helped to review the site. This review found that subsurface vapour transport of volatile chlorinated hydrocarbons through the relative air-permeable vadose zone in the sandstone as a potentially significant contaminant mitigation pathway (Moss, 2004). Due to this finding, a plan was implemented to assess the significance of this potential contaminant migration pathway. This plan involved installing a network of vapour monitoring wells around the North and South Quarry between the source area and the potentially affected houses. These monitoring stations found hexachlorobutadiene concentrations, these have raised concern over the potential to affect indoor air in the surrounding properties. Dose Data In the following years, a more comprehensive study was undertaken by the Building Research Establishment (BRE), this involved screening 390 properties over 15 months (Moss, 2004). They indoor air value has a guideline if 0.6 ppbv (Parts per billion by volume) for HCBD levels (Barnes et al., 2002). The tests found a total of 29 properties that exceeded this level. All of these houses were adjacent to the quarry. From these findings, the release of HCBD from the quarry is at a dangerous level, action must be taken to prevent human life being put at risk. Risk Assessment: Cancer HCBD has been found to be a carcinogen, studies on rats have proven that the chemical does cause cancer in high doses (Berndt and Mehendale, 1979). This has yet to be proven on humans. Using the cancer potency information taken from the EPA IRIS database, the probability for the additional cancer risk through exposure to HCBD has been calculated at 6.0E-4 (6.010-4). The equation to calculate this reads: P(d) = q * d The P(d) is the lifetime probability of developing cancer, d is the dose (mg/kg per day), q is the slope potency factor (mg/kg per day)-1. The odds of gaining cancer through exposure to any chemical need to be below one in a million. As proven by this equation the conservative low-dose cancer probability is 6.0E-4. This is way above the one in a million, meaning exposure to this chemical is too high of a risk of causing cancer. From this it shows that something must be done to more humans away from the site. As HCBD was found at the quarry and within the air in and around the houses, some action must be taken as it is not safe to live there. Hazard From the CalTOX model a hazard index can be produced. This uses the Exposure dose over the tolerable daily intake. If this value is greater than one, there is an unacceptable risk. From this a hazard index number is calculated, for this exposure it is 7.4 E (7.410). The value of 7.4 E is very high, proving some action needs to be taken. What could be done? As proven by the results the hazard and cancer risk is too high to have no intervention at this site. Something must be done to either stop the outbreak and/or remove residents from living near the quarry. The ICI have many options to try and resolve this problem, however some have concerns over effectiveness and expensiveness of the methods. The first method is to remove the source of the HCBD. This would involve excavating the site, pulling up all the landfill and removing it to a secure location where it can be destroyed or dealt with. This method would ensure no more HCBD and other dangerous chemicals would be released around the quarry (Poblete et al., 2011). This method is useful as the source has been removed, so there would be no new production. However, this will be a large-scale project, that will take months to years to complete. This would cause major disruption to the town with heavy traffic and noisy work. On top of this, it would be the most expensive method. Another method that could be considered is trying to contain the site. This method would involve re-capping the site, by removing what is already there and putting a new layer on. There are three steps to this, a top layer of soil and vegetation, the second is a drainage layer and the third is a low permeable layer (Rittmann et al., 1996; Raghab et al., 2013). This is typically made of synthetic material covering a few feet of compacted clay. The main benefit of this is that no more chemicals would be allowed to escape into the surrounding area. This would also make the local properties livable again after the HCBD has been removed from the air. A problem with this method is that it could become quite expensive and has the potential to cause minor disruption. The effectiveness of this is also questioned, as typically when landfill sites are capped they should be contained and as proven at Weston it does not always work. A method that should be considered is to capture the HCBD released. Siwajek et al. (1998) studied the recovery of gas at landfill sites. This was done for both methane and carbon dioxide, however it’s still unsure if this could be done for HCBD. As stated by Siwajek et al. (1998) this method would require the installation of pipe work all around the site and has the potential to be expensive. A third option is to relocate and rehouse the local residents and demolish the houses. This would mean that residents would not be at risk. However, this would not be favorable to local residents. Management of HCBD risk in Weston The recommendations going forward would be to prevent the further release of HCBD and any other chemicals. This would best be done via containment, if plausible at this site. This would mean that local residents would be able to stay. However, it could be for the best if the house that recorded unsafe levels of HCBD be demolished or evacuated until safe to return. On top of this, a plan should be put in place for healthcare to local residents that were/could have been at risk of ingestion of HCBD. The uncertainties within this approach is the effectiveness of the containment and the potential for future leakage as the source is still nearby. To counter these a safe radius around the site should be erected with any houses within this demolished and the residents rehomed. When resealing the site, an alternative cover type could be used such as asphalt or a bioengineered management cover, however the most effective for preventing further release should be used. Model suitability and validation Like any model, the results are not always accurate, however they are very useful. This is especially true when predicting future outcome. They are also valuable when testing something potentially dangerous, such as the exposure of chemicals. The CalTOX model used was useful as many parameters can be inputted into the model. This is especially true for the landscape as biological, aquatic and soils based properties can be altered (Bonnard, 2006). One advantage of the model is the speed, the model can be changed and run in minutes (Hurtwich, 2000). To make any alteration, the whole model does not have to be run again, this is the advantage of the model being simulated in Excels. However, there are some disadvantages with using the CalTOX model. This includes the uncertainty and sensitivity to the parameters, this also raises questions over the accurate meaning given to the parameters concerning their actual use in the equations (Bonnard, 2006). As much of an advantage having lots of parameters is, it can also be a problem. This is shown if there is a lack of scientific data for many of the limits, the model cannot be run to full potential. To complete the spreadsheet a lot of data collection would be needed. What did happen at Weston village? As the results from the Building Research Establishment were over 0.6 ppbv in 29 houses adjacent to the quarry, it was determined the best course of action was to demolish the houses. This meant there would be no future risk as the land is uninhabitable, and the quickest solution (Barnes et al., 2005). Conclusion The quarry site around Weston village has leaked the carcinogenic chemical HCBD. From inputting the details of this exposure into the CalTOX model, it assessed the human risk to HCBD. From this it was determined the chemical was unsafe and too much of a hazard to allow it to be inhaled. To prevent future incidents, a recommendation to re-contain the site to prevent the further release of HCBD and other chemicals. This method would cause disruption to the local community and force some residents out of their homes, however this seems the best method going forward. Comparing this to the actual outcome, less houses would be demolished and the continued leakage of chemicals out of the quarry would be stopped. However, this would be more expensive and potentially time consuming.

Executive Summary (Benchmark Assessment) Essay Example | Topics and Well Written Essays - 1000 words

Executive Summary (Benchmark Assessment) - Essay Example The project will engage public health agencies and the public towards the achievement of the national goals for preventing and treating heart diseases and stroke through the next two decades (Velu & Lip, 2011). Heart diseases and stroke are among the leading causes of death in America today. They are also among the leading causes of disability meaning that they cost the country so much in terms of treatment and control and could cost more in the future if steps are not taken to address the problem. Therefore, this project will be a step and a vision towards contributing to the steps to combat the dangers of heart diseases and stroke in the country (Velu & Lip, 2011). The project targets both the adult and teenage populations. Adults are more affected by heart diseases and stroke. It has been estimated that every 37 seconds, an adult person in the US dies because of a heart related condition. This is a high rate of death caused by heart diseases. Today, the lifestyles adopted by teenagers in the US has also put them at risk of developing heart conditions and stroke early in their lives. For example, teenagers smoke, do not exercise, take alcohol and eat foods with high calories. This has seen more teenagers develop heart conditions over the years on top of the fact that some of them are at risk because of their genetic makeup (Heidenreich, et.al. 2011). Therefore, the project will target adults and teenagers to ensure that the two groups receive information and the care needed to ensure that their risk of developing heart diseases and stroke is significantly reduced and that they have a prolonged life and also can lead healthy lives (Ustrell & Pe llisà ©, 2010). The focus in the two groups has been informed by the rate of heart diseases and stoke recorded in them, which calls for immediate attention to ensure that the problem does not get worse than it is. The