Monday, January 27, 2020
Monoamine Oxidase (Warrior Gene) and Maori Behaviour
Monoamine Oxidase (Warrior Gene) and Maori Behaviour Monoamine Oxidase (Warrior Gene) andà Its Relation to Maori Behaviour Roberto S. Recto Jr. Abstract This essay tackled primarily on the significant link between Monoamine Oxidase (Warrior Gene) and Maori behaviour. Specifically, this may determine the possible causes of the aggressiveness of the Maori population group as observed by other researchers and scientists as explained on their arguments. The study discussed the census of the population and conviction rate of Maori population with other population group. This study also correlates the specific behaviour of an individual to other factors such as parenting and environmental factors, not solely to the warrior gene. Irregularities in Monoamine Oxidaseââ¬â¢s level in the body have negative effects that were also discussed on this paper. Domestic violence during childhood was also explained briefly and its negative effects to behaviour of an adult person. Negative behaviours that developed may be controlled and managed especially here in New Zealand with the help of the legislation. Introduction Maori population is 682,200 out of the total New Zealand population of 4,433,000 as of 30 June 2012 according to New Zealandââ¬â¢s latest statistics. Maori make up 15.4 percent of the total population here in New Zealand. Despite a few number of Maori people lives in New Zealand, they commit more crimes and are punished in prison than any other population group. Reasons for this apparent fact have not yet been fully discovered or defended (Statistics New Zealand, 2012). 8,618 is the total count of prisoners in New Zealand, 51 percent (4,391) of which are Maori, 33 percent (2,835) are Europeans and 12 percent (1,006) are Pacific people (Statistics New Zealand, 2012). Some studies may blame domestic violence or poverty as the cause of Maoris committing crime. Others may also blame it way back on their ethnicity and culture. David Rankin, a Ngapuhi elder once said that they have come from a warrior race but because of colonization, they have no more battles to fight and they have too much time on hand so that their inner violent energy is not used up (Dinsdale, 2012). But what is the real cause of this? If nature, culture or ethnic origins are the not the cause of this Maori behaviour, what else? Just this decade, a new controversial idea was offered that became an issue both on scientific and political commentators. Dr. Rod Lea, a researcher from New Zealand and his contemporaries proposed that Maoris carry a ââ¬Å"warrior geneâ⬠(Monoamine Oxidase) that makes them more prone to aggressive behaviour that may lead to violence, risky behaviours and criminal acts. He also said that it obviously means that they will be violent or may do risky behaviours but that doesnââ¬â¢t mean that once you are a carrier of this gene, it wonââ¬â¢t automatically make you a criminal (Lea, R., Chambers, G. 2007). There may be some other factors at play that may affect their behaviours such as lifestyle, upbringing-related exposures and others. This specific gene was also associated to high rates of alcoholism, smoking and gambling in the said population group (Once were warriors: gene linked to Maori violence, 2006). Monoamine oxidase as the warrior gene Monoamine oxidase aka the warrior gene was coined by a scientific anthropologist Ann Gibson on an Annual Meeting of the American Association of Physical Anthropologists. (Gibbons, 2004). These enzymes are are involved in the breakdown and synthesis of neurotransmitters. Examples of which are serotonin and dopamine which controls emotions and moods. Being part of the breakdown, Monoamine oxidase (MAO) is capable of manipulating and influencing the personââ¬â¢s mood, emotion, feelings and behavior. Levels of monoamine oxidase (MAO) in the brain conclude how fast metabolism of these neurotransmitters occurs. Variations in level of MAOââ¬â¢s in the brain can affect the individual from panic attacks and anxiety disorders to violence and aggression (Anonymous, 2004). The Argument As stated on the introduction Dr. Rod Lea is a researcher from New Zealand. He and his contemporaries proposed that Maoris carry a ââ¬Å"warrior geneâ⬠(monoamine oxidase) that makes them more prone to aggressive behaviour. The ââ¬Å"warrior geneâ⬠has been linked to criminal acts and associated with risk taking, plus gambling, drug dependence and aggressiveness. Though this gene has been linked to different aggressive and risk taking behaviours, there is no concrete proof that this is the cause of such behaviours. Dr. Nicola Poa a research fellow at Christchurch School of Medicine negated Dr. Rod Leaââ¬â¢s idea. She said it is unheard or unlikely to link a behavior to its said host. Dr. Nicola also said there is a huge ethical behavior behind every action of Maori people. She also stated that it would be a big leap to conclude and connect that this gene would affect the behavior of an individual. She suggested that psychologists and psychiatrists should be involved in this kind of study. Genes are just the basic building blocks of a human being (Stokes, J., 2006). On the other hand, Dr Sam Hancox, a doctor in Otago Universitys at Dunedin Multidisciplinary Area, proposed that the connection between genes and human behavior should also take into consideration environmental factors. He said that a single gene canââ¬â¢t explain everything. It will always be a mixture of different factors (putting emphasis on environmental influences). I quote Dr. Sam Hancox: There is no specific gene for making a great rugby participant, but then if you have the wrong player or participant, no amount of coaching and teaching is going to guarantee he will be an All Black team player. You have to have the perfect set of genes and the perfect set of coaching and teaching. (Stokes, J., 2006). Another research was conducted in 2002. The Otago-based unit researched the results of changes and variation of the Monoamine Oxidase on maltreated and abused children. This research proved that one of the greatest factors of human behavior is his environment and experience. Researchers found some of the population group that they conducted their research on developed antisocial behaviors with high levels of Monoamine Oxidase, despite being maltreated. However 85 per cent of those who are severely maltreated and abused with low levels of the ââ¬Å"warrior geneâ⬠also developed antisocial behaviors (Stokes, J., 2006). Another scientist emerged and contradicted Dr.Leaââ¬â¢s research and hypothesis. Dr. Gary Hooks point of view challenges the idea and concept that Maoriââ¬â¢s are genetically wired to be aggressive, wild and commit acts of violence. Dr. Hook said there was an obvious flaw on Dr. Leaââ¬â¢s hypothesis especially in their scientific reasoning. Not only was the science criticized, but the ethics of claiming that genes are to blame in Maoris behavior is also questioned. He agreed that conviction rates for domestic violence of Maoris are more compared to other population groups in New Zealand but there is no indication that this is because of Monoamine Oxidase gene that are present in their bodies. This gene has nothing to do with their behavior. Maori nature was not the reason for high criminality rates, he said. Maybe the cause of such behaviors is due to the fact that Maoris are colonized for 160 years by a ââ¬Å"Eurocentricâ⬠justice system. (Chapman, K., 2009) Dr. Rod Leaââ¬â¢s argument has been usually weak and unsupported because other factors may affect the behaviour of an individual such as the way they are brought up, social status, economic status and other lifestyle factors. (Stokes, J., 2006). Behavioural effects of MAO irregularities Accepting the argument that the ââ¬Å"warrior geneâ⬠is related to Maoriââ¬â¢s behaviour and traits is weak. There is no proof of exact evidence that this gene underlies a behavioural variation in man. Was the hypothesis made by the scientists and researches are way too impossible? Or was it a reasonable explanation for violent behaviours? MAOs are extremely vital for proper functioning of the brain as they inactivate or activate neurotransmitters. When this genes are in great quantity, there will also be great inactivation of these neurotransmitters. Depression, criminal deeds, phobias, dependence, addiction and other Neurological disorders can occur. (Batts, S., 2006). Abnormal Monoaminase Oxidase levels may manifest negative behaviors such as the following but not limited to Anxiety, personality disorders, antisocial behaviors, violence and risk taking, aggressive behavior, impulsive aggression, mental disorders, obesity, impulsivity, depression and suicidality impaired impulse control, mental retardation (such as autism, seizures, sleep disturbances) and panic disorders (Raumati Hook G. 2009).This might be the reason why scientists are associating this gene to Maori Behaviors. It seems like these scientists are placing the Maori culture under the category of mental health that being a Maori is a disease. They should also put into consideration that behavioural abnormalities cannot and should not only be isolated as to genetics. Environmental conditions should also be in the picture. The warrior gene versus Childhood experiences versus Maori self determination Concluding or proposing that the gene is to blame on Maori behaviour is the same as categorizing Maori behaviour as psychopath, with borderline psychosis or with psychological problem. Yes there are a huge number of diseases and ailments that may be associated with Monoamine Oxidase deficiency, but for the majority of people it functions quite well and consistently. Though conviction counts for domestic violence of this population group exceed those of other group, there is still no definite indication that the genes carried by Maoris functions differently from other ethnic groups and certainly has no evidence that it has something to do with having an aggressive or negative behaviour. (Stokes, 2006) Unpleasant childhood experiences negatively influence adulthood and how a man sees life, as seen on a recent study. The study was conducted by the Centers for Disease Control (CDC). According to the study, one out of four young adults was relentlessly maltreated during their childhood days and approximately half of adults in England have suffered an unpleasant childhood experience. Approximately one out of ten adults has experienced four or more undesirable experience during their childhood.There are different kinds and forms of childhood adversity; it may range from physical abuse to emotional neglect and stress. Examples of these forms of experiences are sexual abuse, emotional abuse, emotional neglect, physical abuse, physical neglect, substance abuse in home, mental illness in home, incarceration of family member, parenteral separation or divorce and witnessing against mother (McDonald, K. 2014). Tino Rangatiratanga or Principle of Self-determination is the sovereignty, independence, self-control and self-determination of the Maori people. The idea of Tino Rangatiratanga reinforces and allowing MÃâà ori to take control of their own culture, fate, destiny and fortune (Smith, G.,1990). This may also be a factor in Maori behavior wherein they believe that they are the man for themselves. They control what they can. And Maori parents may or may not carry this behavior during their parenting that may affect the upbringing of their child. This may lead to negative behaviors as supported by the previous arguments. Despite of all the criticisms to Maori population group, they still have good traits in their hearts and culture. Manaakitanga is defined as being hospitable. They take a great pride in entertaining and hosting visitors to their land. Manuhiri on the other hand means the highest honour and respect are given by these people to visitors. Kaitiakitanga means guardianship (New Zealand Trade and Enterprise, n.d.). In relation to our study, Maori people are stewards and guardians of their own land. They are keeping it sacred and healthy for their ââ¬Å"childrenâ⬠and ââ¬Å"grandchildrenâ⬠to inherit. Conclusion As a conclusion of this paper, Genes are not to blame on how people would behave in a society. Genes may be a factor, but it is still not concrete enough to prove everything. Environmental factors should also be taken into consideration especially on Maoriââ¬â¢s parenting preference. Parenting has always been an issue not only in Maoriââ¬â¢s population group but in every culture on how children would grow up. As I have learned on Values Education during my grade school days, a childââ¬â¢s mind is a clean paper wherein parents are the authors of what the content would be. I also believe that unpleasant childhood experiences will negatively influence adulthood that may lead to aggressiveness and negative behaviours. Every culture and population group have their own positive and negative charaecteristics that other culture may notice. Being aggressive and observed as being violent does not and should not only pertain to Maoriââ¬â¢s population group. Putting the spotlight on this population group regarding aggressiveness is quite biased, to think that other population groups are way more aggressive to the point that they are killing and mutilating body parts of their own people. So for me, choice is the biggest factor of what you would become; a choice of who you want to be and what you want to be, combined with environmental and other factors. And if ever negative behaviour arises, it can be managed with the help of good support systems such as our family, friends, government or private institutions and others. Management of Domestic Violence As we discuss this research, domestic violence became a highlight. New Zealand has a law regarding rehabilitation and management of this matter. Domestic violence can never be prevented because it is a choice, but we can manage the outcome it has done with the person involved. Managing the outcome may prevent negative effects that domestic violence has done to an individual. The Domestic Violence Act of 1995 provides rehabilitation programme for those who are victims of domestic violence with protection orders. The Court contracts with other approved organizations and specialized individuals to offer programmes and rehabilitation. These said programmes contribute to the lawââ¬â¢s principal goal of providing better protection for the victims of domestic violence. When the court decides that there should be a Protection Order, the person involved may request a programme that may provide information, support (whether psychological, emotional, physical etc.) and education that is related to domestic violence. This request can be made until the third year of the release of the Protection order.( Cram, F., Pihama, L., Jenkins, K., Karehana, M., 2002). Word Count: 2363 words ââ¬Å"References Anonymous (2004). Progress in monoamine oxidase (MAO) research in relation to genetic engineering. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/14697876 Anonymous (2006). Once were warriors: gene linked to Maori violence. The Sydney Morning Herald. Retrieved from http://www.smh.com.au/news/world/once-were-warriors-gene-linked-to-maori-violence/2006/08/08/1154802890439.html Batts, S. (2006). The Maori, MAO Inhibitors, and the ââ¬Å"Warrior Geneâ⬠. Retrospectacle: A Neuroscsience Blog. Retrieved from http://scienceblogs.com/retrospectacle/2006/08/10/the-maori-mao-inhibitors-and-t/ Chapman, K. (2009). Maori ââ¬Å"warrior geneâ⬠Research Slammed. Retrieved from http://www.stuff.co.nz/national/2855426/Maori-warrior-gene-research-slammed Cram, F., Pihama, L., Jenkins, K., Karehana, M. (2002). Evaluation of Programmes for Mà ¤ori Adult Protected Persons under the Domestic Violence Act 1995. Ministry of Justice. Retrieved from http://www.kaupapamaori.com/assets/evaulations_programmes.pdf Dinsdale, M. (2012). Maori a violent people Rankin. The Northern Advocate. Retrieved from http://www.nzherald.co.nz/northern-advocate/news/article.cfm?c_id=1503450objectid=11051172 Gibbons, A. (2004). American Association of Physical Anthropologists meeting: tracking the evolutionary history of a ââ¬Å"warriorâ⬠gene. Retrieved from http://www.sciencemag.org/cgi/content/summary/304/5672/818a Keller, T. E., Cusick, G. R., & Courtney, M. E. (2007). Approaching the transition to adulthood: Distinctive profiles of adolescents aging out of the child welfare system. Social Services Review, 81, 453-484. Lea, R., Chambers, G. (2007). Monoamine oxidase, addiction, and the ââ¬Å"warriorâ⬠gene hypothesis. Journal of the New Zealand Medical Association, 120(1250). Retrieved June 12, 2008, from http://www.nzma.org.nz/journal/120-1250/2441/. McDonald, K. (2014). Adverse Childhood Experiences Affect Adult Behaviors.Psych Central. Retrieved on January 26, 2015, from http://psychcentral.com/blog/archives/2014/06/28/adverse-childhood-experiences-affect-adult-behaviors/ New Zealand Trade and Enterprise (n.d.) MANAAKITANGA, KAITIAKITANGA HOSPITALITY, GUARDIANSHIP. new zealand trade and enterprise retrieved from https://www.nzte.govt.nz/en/how-nzte-can-help/te-kete-tikanga-maori-cultural-kit/manaakitanga-kaitiakitanga-hospitality-guardianship/ Raumati Hook G. (2009). ââ¬Å"Warrior genesâ⬠and the disease of being MÃâà ori. MAI Review. Retrieved from http://www.review.mai.ac.nz/index.php/MR/article/viewFile/222/243 Smith, G. H. (1990) Research Issues Related to Maori Education. Retrieved from http://www.rangahau.co.nz/research-idea/27/ Statistics New Zealand (2008). Retrieved from http://www.stats.govt.nz/default.htm Statistics New Zealand (2012). Retrieved from http://www.stats.govt.nz/tools_and_services/media-centre/additional-releases/maori-population-estimates-15-nov-2012.aspx Stokes, J. (2006). Maori warrior gene claims appalling, says geneticist. The New Zealand Herald. Retrieved from http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1objectid=10395491 ââ¬Å"
Sunday, January 19, 2020
The Mormon Religion - The Church of Jesus Christ of Latter-Day Saints :: Church of Jesus Christ of Latter-day Saints
The Mormon Religion - The Church of Jesus Christ of Latter-Day Saints The Church of Jesus Christ of Latter-Day Saints, true? Not true? Christians? Not Christians? These are some of the questions people ask about the Mormon church. How did the Mormon church start? Joseph Smith Jr. was born in 1805 in Sharon, Windsor County, Vermont, to Joseph and Lucy Mack Smith. He had 10 brothers and sisters. His parents taught him to pray, read the Bible, and to have faith in God. At age 14, Joseph saw God the Father and His Son, Jesus Christ, in his First Vision. At age 17, Joseph began to receive heavenly messengers who prepared him for his role in the Restoration of the Church of Jesus Christ to the earth. He was a prophet, just like those in biblical times. The First Vision As a boy, Joseph Smith was surrounded by various churches which each claimed to teach the truth. This caused him much serious reflection. He wanted to know which church was right. One day he read a passage in the Bible which says, ââ¬Å"If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given himâ⬠(James 1:5). Joseph decided to accept the invitation to ask God.(James 1:5) 5 aIfâ⬠¢ any of you lack bwisdom, let him ask of God, that cgiveth to all men liberally, and dupbraidethâ⬠¢ not; and it shall be given him. In the spring of 1820, Joseph went to a grove of trees near his home and prayed to learn which church he should join. In answer to his prayer, Heavenly Father and His Son, Jesus Christ, appeared to him. Joseph wrote: ââ¬Å"When the light rested upon me I saw two Personages, whose brightness and glory defy all description, standing above me in the air. One of them spake unto me, calling me by name and said, pointing to the otherââ¬âThis is My Beloved Son. Hear Him!â⬠Joseph was told to join none of the churches that existed at that time. Josephââ¬â¢s written account of this event is a powerful testimony of what he saw and experienced. Josephââ¬â¢s written account After I had retired to the place where I had previously designed to go, having looked around me, and finding myself alone, I kneeled down and began to offer up the desires of my heart to God. I had scarcely done so, I saw a pillar of clightâ⬠¢ exactly over my head, above the brightness of the dsunâ⬠¢, which descended gradually until it fell upon me.
Saturday, January 11, 2020
Sand Casting Techniques
MME 3210 Materials Processing Techniques Laboratory Assignment ââ¬â Sand Casting of an Aluminium 13wt% Silicon Alloy 1) Process Attributes Waste shown yellow* Waste shown yellow* After taking part in the sand casting laboratory session it was made clear that the process possessed many advantages and disadvantage, both from the process itself and from the final part produced. Observing the process step by step it was noted that the tasks carried out by the operator were not very difficult (i. e compacting sand, pouring liquid metal) and so giving the advantage of only requiring a low skill level.However, although the process did not involve a large amount of skill it was observed to be very labour intensive and took a long time to complete one cycle of the process (around 30mins). Having a long cycle time is clearly a disadvantage as time is money in the manufacturing industry but this could be slightly reduced if multiple moulds were prepared simultaneously. Another advantage obs erved during the sand casting procedure was that the equipment used was not very expensive and unlike other casting processes the mould was reusable.With only a low capital investment needed this would make short production runs viable. Probably the most noticeable disadvantage to the sand casting method was the low material utilization. In the labs example (seen left), almost a third of the material used is lost to the riser, runners and feeder. Particularly in todayââ¬â¢s waste conscious culture this can cause many problems, however it can be tackled by better design. 2) Process Problems Shrinkage: Shrinkage defects in the final product are usually the result of a feeding defect.As shrinkage naturally occurs during the solidification process, if liquid metal is not sufficiently fed through the feeding system to compensate then it will result in an indented surface. The surface defect was clearly shown in the lab example (shown left). A shrinkage defect normally occurs on the la st part to solidify, so logically in the labs case the shrinkage occurred on the surface of the thickest part Furthermore the big defect problem of a surface sink was observed in the sand casting lab session (shown left).A sink such as this would give major dimensional inaccuracies and would probably have to be redone as it would be unsuitable and uneconomical for further processing. Solution: One way in which an engineer could reduce the effects of shrinkage is to design the mould to compensate for the shrinkage during solidification (i. e making the mould larger). Also due to shrinkage being mainly associated in being a feeding problem, the redesign of the feeding system would reduce the set back. Making the feeding sprue thicker would ensure that the system continues to feed liquid metal to the cavity, thus preventing shrinkage.Furthermore utilizing a uniform part thickness would also tackle the problem reducing residue stresses and leading to uniform cooling. Rough Surface Textu re: The defect causes an undesirable distorted surface finish and is formed due to the texture created from the compacted sand used to create the mould cavity. The effect was observed in the part created from the lab session and can be seen right. Solution: The rough surface effects created from the mould sand can be significantly reduced by using sand with very small grain size.Particularly for the face sand which lines the surface of the mould cavity, if the grains used are very fine then surface finish will be improved dramatically. Porosity: The defect of porosity occurs because of the liquid metal used to create the part can hold large amounts of dissolved gasses. As the liquid metal solidifies, the materials new solid form can no longer hold these gasses and so they form bubbles. These bubbles can be generated both on the surface of the material and internally, thus they effect the strength of the materials solid form and resulting in a decrease in mechanical properties.Effect s of porosity shown above* Effects of porosity shown above* In the lab example holes were added in the sand to allow gas and moisture to escape, however effects of porosity were still clearly visible. Solution: The solution to eliminating the undesirable effects of porosity is based around minimizing the amount of gas that is in the liquid metal. One way in which gas inclusion to the liquid metal can be reduced is to minimize the effects of turbulence experienced during the filling process.Similarly to solving the problem of shrinkage, this can be solved by redesigning the filling system. The design used in the lab example used the bad design set up. With the sprue placed at the top of the mould cavity, the liquid metal flows fast splashing in to the mould cavity below and resulting in turbulence and gas inclusions. If the good design set up is implemented then the liquid metal will flow slower and because runner is fed into bottom of the mould cavity with several gates, splashing w ill be significantly reduced, turbulence minimised and inclusion of gasses eliminated.Good design Good design Bad design Bad design 3) Advantages for using Aluminium ââ¬â Silicon alloy having 13wt% Si: * Aluminium alloys supply reasonably high tensile strength in relation to density, compared with other alloys such as cast steel. * Corrosion resistant in normal environment. * High fluidity of composite melt provides easy transfer and pouring of material to mould (demonstrated in lab shown below). * Utilizes a Eutectic system, reducing defects such as porosity. * Silicon within eutectic results in: Increased corrosion and wear resistance. * Reduced thermal expansion coefficient. * Improved casting and machining characteristics. *Increasing silicon content within alloy will magnify these properties accordingly * Different Al and Si within Eutectic act as a hindrance to dislocation movement. * On part completion, alloy material can be easily polished and painted for an aestheticall y pleasing surface finish. 4) Nucleation Solidification does not happen instantaneously but occurs by a process of nucleation and growth.All pure crystalline solids have a given melting temperature (Tm), although when above this temperature the material will be in a stable liquid state, if cooled to a temperature equal to Tm then the material will start to crystalize. This usually involves some degree of undercooling for crystal nuclei to form. Free Energy Of system Free Energy Of system From the graph above it can be seen that by increasing the undercooling ? T, the free energy also increases ? G. Gets steeper as T is decreased Gets steeper as T is decreased There are different types of nucleation, homogeneous and heterogeneous.Although homogeneous almost never occurs in real life it can be used to build a model of the more realistic heterogeneous nucleation. Heterogeneous occurs on an existing nucleant but unlike homogeneous the nucleated cap is a solid rather than a sphere, thus less atoms are required. Process usually requires liquid to wet the nucleant surface. Growth For growth to be sustained, the temperature of the melt must be less than the melting point. The speed in which growth occurs can be controlled by the amount of undercooling applied, with a large amount of undercooling resulting in rapid growth.In addition the growth also depends on how fast latent heat is removed during crystallization. Both these aspects contribute to the temperature gradient of the melt which affect crystal formation. Constitutional Undercooling Usually caused by non-equilibrium concentration gradient, constitutional undercooling is more likely to be found in alloy casting rather than in pure materials. Seen in the diagram right, the amount of constitutional has a large impact on the type of crystal growth. Looking at the solidification of Al 13% Si, it would be expected to solidify under eutectic solidification.Due the fact that it is a composition of two materials, alum inium and silicon, and that during the lab the material solidified at a single temperature (room temperature). Furthermore it also provides the lowest melting temperature for the materials used. This is an energy savings in a production area. 5) From the many defects created during the creation of the lab example part it was clear that something in the process needed to be changed in order to produce a part of a more acceptable quality.As highlighted earlier, a main area for improvement was with the method of delivering the liquid material to the mould, particularly focusing on the design of the feeder. The current feeder design used is very basic and can be seen right. The set up uses a thick single vertical cylindrical shaft with a very small taper, delivering liquid metal directly to the cavity via a single runner. Concentrating on feeder design, one way in which defects can be reduced is by supplying the cavity with a smooth constant volume of flow.As the current feeder is very thick, the material is delivered very fast to one area of the cavity causing turbulence and inclusion of unwanted gas. This undesired effect could be minimized by changing the set up of having one large feeder to possibly 3 smaller ones. The use of multiple feeders would allow a more evenly distributed and constant metal flow. In addition the angle of taper could be increased to assist constant volume flow. Cavity Cavity Multiple feeders Multiple feeders Each of the feeders used should be reduced in thickness as much as possible, still maintaining the desired flow rate.This is important as although deliverance of material is critical, the amount of waste material must be reduced as much as possible. Although only visual inspection was applied to the produced lab part, if it was discovered that the defects main cause was that of impurities within the solidified material than the Cosworth ââ¬Ëââ¬â¢upward fillââ¬â¢Ã¢â¬â¢ system could be employed. Due to its upward fill the p rocess eliminates the problem of impurities within the liquid melt and impurities that sink or float are discarded. References http://www. acetake. com http://www. rheocast. com www. electrochemsci. org/papers/vol4
Friday, January 3, 2020
The Vietnam War Essay - 1042 Words
The Vietnam War From President Truman to President Nixon there was a belief that communism in Southeast Asia jeopardized American interests. President Johnson sent over a half million troops to mediate the civil war happening in Vietnam. As the Vietnam War struggled in its second era, there seemed to be no visible end in sight. American casualties and violence were increasing in vast numbers. Young men who had receivedâ⬠¦show more contentâ⬠¦This idea included all freedoms, from racial, sexual and religious biases. The thought that power and money were identical with morality was tested by the students who were the next possible victims being trained by the systems callous disposition. This is how students felt, and they were appalled and believed they were looked upon by the administration as ââ¬Å"business as usualâ⬠on the campus. Under the leadership of Johnson and Nixon, the country had grown increasingly critical as our own dead and injured returned from the battlefield. Finally, when Hai Phong Harbor was mined, Cambodia invaded, and the heaviest bombing on civilians started up. Campuses went crazy, and unarmed student protestors were fired upon and killed by the National Guard at Kent State Univer sity and by the police at Jackson State University (University of Miami Libraries, 2006). The effects of the war were most difficult on the baby boomer era. Draft appeals were increasing to the young people while civil rights and counterculture were urging students to demand answers on Americaââ¬â¢s objectives. No matter what you believed in, every American stood their position on the war. The Johnson Administration intended on fighting the war in cold blood, which means going to war in Vietnam would have little influence on domesticShow MoreRelatedThe War Of Vietnam And The Vietnam War1525 Words à |à 7 PagesThe war in Vietnam is The United States and other capitalist bloc countries supported South Vietnam (Republic of Vietnam) against the support by the Soviet Union and other socialist bloc countries of North Vietnam (Democratic Republic of Vietnam) and the Vietcong of war. Which occurred during the Cold War of Vietnam (main battlefield), Laos, and Cambodia. This is the biggest and longtime war in American history during the 1960s (Best 2008). It is also the most significant war after World War IIRead MoreThe Vietnam War On Vietnam1725 Words à |à 7 PagesThe War on Vietnam Many believe that the way Americans entered the war against the North Vietnam communists was unjust. The United States got into a war that they had no clue on how to win. ââ¬Å"The Vietnam War was a long, costly armed conflict that pitted the communist regime of North Vietnam and its southern allies, known as the Viet Cong, against South Vietnam and its principal ally, the United States. The divisive war, increasingly unpopular at home, ended with the withdrawal of U.S. forces in 1973Read MoreThe Vietnam War : Vietnam1170 Words à |à 5 PagesBeyond Vietnam. The Vietnam War is one of the most traumatic episodes in the history of the United States. Not only because it ended with a defeat for the United States Army, but because unleashed the largest wave of protests in the country, in which the government lost support. Extended over more than a decade, between 1959 to April 30 of 1975, although the US intervened in 1965, in which American soldiers experienced in firsthand scenes of destruction and death. 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Many also wanted to stay democratic and still had it hopes high that it will soon get their lives and economy back on track. It later exploded into a huge argument and then leads to a civil war spurring between NorthRead MoreThe Vietnam War Of Vietnam952 Words à |à 4 Pageswords that describe the Vietnam War. The Vietnam War had 240 days of combat in one year. World War II had forty days of combat in four years(Interesting Facts). That statistic shows how rough the Vietnam War was. The fighting was constant between the two sides. This war was fought over politics and had many gruesome battles. Before the Vietnam war, Vietnam was in a revolution because they did not want to be ruled by France. Vietnam wanted to be independent right after World War II ended in 1945. JapanRead MoreThe Vietnam War Of Vietnam1534 Words à |à 7 Pages The Vietnam War began November 1st, 1955 and ended April 30th, 1975. It was a long costly war that involved North Vietnam and their Southern allies, known as Viet Cong, against South Vietnam and its main ally the United States. This war was very unpopular at home and would end with the withdrawal of the United States and the unification of Vietnam under communist control. Many think of war as something that just men are involved in but very rarely do people think of the role of women in the warRead MoreThe Vietnam War Of Vietnam1573 Words à |à 7 PagesA. The Vietnam War occurred from 1955-1975, this included the North and South fighting over government structure of the newly independent state of Vietnam, having recently become independent f rom France. However, the USA was in Vietnam as a sort of protection for the South Vietnamese people, who had a weaker army force, but only a few thousand Americans were in Vietnam for that purpose at the time. On August 7, 1964, the USA entered the war for the purpose of fighting the North Vietnamese due toRead MoreThe Vietnam War Of Vietnam2003 Words à |à 9 PagesThe Vietnam War in Vietnam, Laos, and Cambodia lasted from November 1st, 1955 to around April 30th, 1975. The war was split up between two sides, North Vietnam, who were allied with the Soviet Union, China, and most of the communist countries during this time period, and South Vietnam, who were allied with the United States and many countries that were against the belief of Communism. Although the United States did not necessarily have to get involved in the war, they believed that they had too soRead MoreVietnam And The Vietnam War1987 Words à |à 8 PagesIn 1945, at the end of WWII, Vietnam started their war for ind ependence against their colonial rulers, France. Nine years after the start of the First Indochina War, the French were defeated at Dien Bien Phu which led to a peace conference in Geneva. At the conference, Laos, Cambodia, and Vietnam received their independence from France. However, Vietnam was divided between a Communist North and a Democratic South. In 1958, Communist- supported guerrillas in South Vietnam, known as the Viet Cong, began
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