Human Anatomy and Physiology Essay Example | Topics and Well Written Essays - 2000 words

Human Anatomy and Physiology - Essay Example The hip joint is a good example of a ball and socket joint. A ball and socket joint is so-called because of its general physical makeup, which consists of a bony pocket and a ball-like appendage on the connecting bone that fits within this pocket. This type of joint provides a wide range of motion in several directions as well as the ability to carry a great deal of strength. In addition to the hip joint, the shoulder joint is another example of a ball and socket joint. The bones of this joint consist of the ilium, the femur and the ischium. The ilium contains â€Å"four spines serving as sites for muscle and ligamentous attachments† while â€Å"two large processes - an upper, lateral ‘greater trochanter’ and a lower, medial ‘lesser trochanter.’ †¦ provide attachments for muscles of the legs and buttocks† (â€Å"Human Anatomy Online†, 2004). The important ligaments involved in this joint include the pubofemoral ligament, the iliofemoral ligament, the ligaments of the sacrum and the ischiofemoral ligament. The major muscles involved in this joint include the iliopsoas muscles, the gluteous muscles, the piriformis and gemellus muscles, the sartorius muscle, the pectineus muscle, the quadriceps femoris muscles, the gracilis muscle, the adductor muscles and the hamstring muscles. The iliopsoas is actually two muscles that blend (â€Å"Human Anatomy Online†, 2004). The psoas major originates at the â€Å"sides of T12 to L5 vertebrae and intervertebral discs between them† and its insertion at the lesser trochanter of the femur. The iliacus originates at the iliac crest, iliac fossa, ala of sacrum, and the anterior sacroiliac ligaments while insertions are at the tendon of psoas major and the body of the femur, inferior to the lesser trochanter (â€Å"Muscles of the Hip and Thigh†, 1998). These muscles are the strongest flexor muscles of the thigh and work to maintain erect posture at the joints as well as to raise the trunk from a flat (lying

Terror management theory

Terror management theory The effects of terror management theory on political decisions Summary The terror management theory suggests that feelings of anxiety and fear are caused by thoughts of death (mortality salience) which may affect our thoughts, decisions and actions. The fear/anxiety caused triggers off defence mechanisms which cause individuals to feel closer to their beliefs and what they regard as a good and valued way of living (cultural worldview). The study will be looking at how the manipulation of mortality salience affects the ratings of two world leaders, predicting that they will rate highest the world leader which identifies the most with their cultural worldview. The participants will be British University students and the design of the study is an independent measures design. The participants will be asked to fill in an identification scale on being British, a word search where the experimental condition will contain mortality salience and the control condition will not, they will also be asked to fill in small maths calculations and they will be finally as ked to rate two world leaders (Englands prime minister Gordon Brown and Russias president Dmitry Medvedev) on a scale indicating how strongly they feel about the statements about each world leader. The ethical issues in the experiment are confidentiality, informed consent, anonymity, mortality salience and the use of findings. These issues will be dealt with by gaining presumed consent, the right to withdraw from the experiment at any time and debriefing each participant at the end to make sure they are comfortable and satisfied with the information they provided. Mortality salience will be kept as minimal as possible via using a word search and a distracter task which will be used afterwards to ensure that as little harm or no harm at all is caused to the participants. Introduction Terror management theory was developed by Jeff Greenberg, Sheldon Solomon and Tom Pyszczynski and is based on death. Humans are unique as they are the only living species that are aware of their inevitable death and this causes fear (terror) which would make carrying on with daily tasks impossible. Therefore, it is suggested that when an individual is reminded of death (mortality salience) they instantly use two defence mechanisms to protect themselves and get rid of these thoughts of death. The first defence mechanism is when an individual has their own personal views and standards on how they should live their life and therefore, individuals strive to meet those standards to feel as valued members of society (cultural worldview). Culture also provides individuals with symbolic immortality such as, being part of families and ethnic groups, because even after their mortality these groups will still exist and individuals will still be remembered as parts of them. The second defence me chanism is self-esteem which reduces anxiety when self-esteem is high and this is achieved by individuals believing and maintaining that they live up to the standards that are parts of their cultural worldview. When individuals are successful this causes high self-esteem which reduces the anxiety caused by threats. Furthermore, when others have the same cultural worldview as ours (in groupers) it suggests that our view is right and we need this confirmation from others to keep believing in our cultural worldviews. However, defence mechanisms are triggered off when there are threats against ones world view and beliefs. The thought of death and other individuals with different cultural worldviews (out groupers) could challenge our beliefs leaving us with feelings of anxiety which makes individuals want to live up to their cultural worldviews even more. Many studies have tested the mortality salience hypothesis such as Rosenblatt, Greenberg, Solomon, Pyszczynski and Lyon (1989) who used twenty two judges in a study where half of the judges were reminded of their own death (mortality salience), before setting bail to a prostitute and the other half were not. The judges who were reminded of their death set bail at $450 and judges who were not reminded of their death set bail at $50. This shows that the knowledge of death causes individuals to maintain their cultural worldviews which is reflected onto the amount of bail set as generally prostitution would be seen as wrong in many individuals cultural worldview. The terror management theory also assumes that when people are reminded of death this affects their decisions towards certain important issues such as politics. Studies show that when mortality is salient many individuals support people with the same political views as their selves and act hostile and negatively towards people with different political views. For example, Landau et al. (2004) found that when individuals were reminded of the 9/11 attacks they seemed to be more supportive of President Bush whereas, in control conditions less than half supported his decisions. This shows us that the thought of death can have effects on our political decisions and views and this knowledge of fear seems to be used by politicians to receive more support from the public. Other studies have also showed that death increases nationalism. In one study on American participants, when they were reminded of death they were more positive towards people who thought positively of America and were more negative towards people who thought negatively of America (Greenberg et al.,1990). Different countries also found similar results such as in Germany when Germans were reminded of death they sat closer to other Germans and sat further away from Turks (Ochsman and Mathay, 1994). These studies show us that when individuals are afraid of their mortality they feel closer to their cultural worldviews than ever before as a way of protecting themselves. This causes attitudes and beliefs to strengthen which in turn causes individuals to view any other belief as wrong and negative. This may cause extreme behaviour such as terrorist attacks, hate crimes and violence. As a result of all of these, individuals would feel closer to a president who knows exactly what they are doing, are devoted and sending out a strong message. Rationale (purpose) and aims of study: The aim of the study is to show that thoughts of death affect our lives and the decisions we make, including decisions about politics. The study will be testing to see how British participants will react towards their very own world leader prime minister Gordon Brown and another world leader, Dmitry Medvedev Russias president. Participants should prefer Gordon Brown rather than the other world leader when reminded of death as he is closer to their cultural worldview. Research questions: When mortality threat is salient will individuals have a stronger attitude towards their beliefs and their cultural worldview? Hypotheses: Individuals political orientation will be closer to their cultural worldview when mortality threat is salient. Method: How hypotheses addresses aims of study: The aim of the study is to show that thoughts of death affect our political decisions as well as general decisions and the hypotheses relates to this as it is suggesting that individuals will feel closer to the world leader which identifies with their cultural worldview the most. Operationalised variables: 1) Mortality salience is manipulated by the word searches, ones neutral; one has death related words and 2) asked to rate world leaders on a scale about whether they are good/satisfying world leaders. Design: The participants will be randomly assigned and the design used will be an independent sample design, as different participants will be used for the two different conditions. The independent variables are the manipulation of the mortality salience (control condition and experimental condition) and the two different world leaders. The dependent variable is the results from the rating scales of the two different world leaders. Participants: British university students, male and female. Around 50 participants will be used. Materials: Identification scale, two word searches, small maths calculations and profiles of the two world leaders including the rating scale. Procedure: First of all participants will be seated and the first thing they will fill out is their gender, age and an identification scale on how British and close to their culture they feel. Then they will do a word search, however, there will be two conditions in the experiment one will be the controlled condition where participants will receive a normal word search and will not involve mortality salience, whereas, the experimental condition will involve mortality salience. After the word searches participants will work out small maths calculations, then they will receive profiles of two world leaders one is Gordon Brown Englands prime minister and the other is Dmitry Medvedev Russias president. In order to eliminate the effect of order effects I will have some profiles with Gordon Brown presented first than Dmitry Medvedev and vice versa. Participants will have to rate the statements of the world leaders on a scale indicating how strongly they feel about each one. Ethical issues: The ethical issues in the experiment are confidentiality, informed consent, anonymity, mortality salience and the use of findings. These issues will be dealt with by gaining presumed consent, the right to withdraw from the experiment at any time and debriefing each participant at the end to make sure they are comfortable and satisfied with the information they provided. Mortality salience will be kept as minimal as possible via using a word search and a distracter task will be used afterwards to ensure that as little harm or no harm at all is caused to the participants. Analysis of results: The results will be analysed by a 2 by 2 mixed factor Anova. The IVs are mortality salience (experimental condition and controlled condition) and the world leaders (Gordon Brown and Dmitry Medvedev). Schedule for completion of project: Collect all data by December Analysis of data in the Christmas break Write up of results and report January/Febuary till March

Autoparasitoid Wasps Essay -- Biology Encarsia Pergandiella Parasite

A parasite lives in a close relationship with another organism, its host, and causes it harm. The parasite is dependent on its host for its life functions. For example, viruses are common parasites. The parasite has to be in its host to live, grow, and multiply. Parasites rarely kill their hosts. A common, well-known type of a parasite is a hookworm. It is possible for humans or their pets to get them. Hookworms attach themselves in the lining of the small intestine, and cause diseases, and malnutrition as well, as they eat the nutrients and keep them from going to the host. Here, we'll be talking about a different type of parasite, called a parasitoid. The parasitoid Encarsia pergandiella is a tiny wasp that lays its eggs in developing whiteflies. The wasp larva eventually kills the whitefly, and then emerges as free-living adults. This is why it is said that the wasps are parasitic. If you have ever seen Aliens, the developing aliens are parasitoids. Parasitods are different from normal parasites because they kill their hosts when they develop. Encarsia pergandiella develops in a strange way. Unlike most parasitoid species, they are autoparasitoids. This means females develop on whitefly immatures and males develop on immature parasitoids. This means males are parasitoids of other parasitoids, including females of their own species! The fertilization process is a female decision. The female stores the male sperm for later fertilization of eggs. All bees and wasps, including parasitoid wasps are haplodiploid. This means not all eggs have to be fertilized to develop. Unfertilized eggs become males, which are haploid. Fertilized eggs become female, and are diploid. In autopara... ...romosome carried by the males was killing the whole male set of chromosomes, leaving only one set of female chromosomes along with this extra chromosome, which becomes a male haploid wasp. This PSR chromosome is also called a supernumerary chromosome in the nuclei. In the study of Encarsia pergandiella, male wasps were also found to come from fertilized eggs that had been placed on the whitefly host and it was found that, similar to N. vitripennis, the entire paternal set of chromosomes was being lost. It was thought that perhaps an extra chromosome, such as the PSR chromosome, was also being carried in them. However, after further study a supernumerary chromosome was not found. The casue of genome loss in E. pergandiella is still a mystery. Perhaps the male set of chromosomes were being killed by another source, such as a virus or transposable element.

Compare the ways in which 3 poets write about relationships Essay

Introduction ‘To his coy mistress’, ‘Remember’ and ‘Since there’s no help†¦Ã¢â‚¬â„¢ are all poems about relationships, the difference is the interpretation of the poet’s message, structure and other various aspects of the poems. ‘To his coy mistress’ by Andrew Marvell and ‘Since there’s no help’ by Michael Drayton were both written around the 16th and 17th centuries and explain very different characteristics of love. Drayton wrote a poem about the end of a relationship with a partner expressing that the love between them is dying. On the other hand Marvell writes, in a poetical way, someone’s argument to a lover trying to persuade them to have sex with them. This poem captivates your attention with the extremes a man would go to have sex with a young virgin, unlike the other poems that are about two partners love for each other. Similarly to Draytons poem, about love in a relationship, Christina Rossetti wrote a poem in the late 19th century to her partner telling him what to remember about their time together. Themes/subject The poem ‘To his coy mistress’ starts with Marvell addressing the young lady, whom he wishes to be his lover that there is no time for her to be coy. Straight away this gives the impression that he’s an intimidating and powerful man. ‘Had we but world enough, and time, this coyness, lady, were no crime’ Marvell tells the lady that being coy is alright when you have time but implies their time is limited and therefore she has no time to be coy, in effect he is pressurising her to do something that she is uncomfortable with. Through the repetition of time in the above sentences you may have guessed that it plays an important role in the poem. Marvell refers to time regularly in the poem as part of his persuasion techniques. The way in which he uses time pressurises the woman into doing what he wants. For example ‘Time’s winged chariot hurrying near’ implies that she can’t live forever so must make the most of the time she has. He uses time again in the concluding lines of the poem as a last persuasion to get his way ‘Thus, though we cannot make our sun stand still, yet we will make him run’ Here Marvell explains to the lady that they cannot make time stand still completely but they can make the most of the time they have. When you feel bored and upset your time seems to go slowly compared to when you are happy and this quote uses this to say that their time will be ‘running’ if they are together due to the good times they will have. Similarly to Marvell, personifying time, Drayton uses the same technique by personifying love ‘Now, if thou would’st, when all have given him over, from death to life thou might’st him yet recover’ Here Drayton has personified love by saying it is dying but may come back to life. I feel this is a good method by which the poet can get his message across with ease. In this case Drayton has personified love as a person on the verge of death. When comparing the two poems it becomes clear that this technique is also useful in distinguishing the message from a speech or letter into a poem. Images A positive image in the love poem ‘Remember’ is where Rossetti writes ‘Better by far you should forget and smile than you should remember and be sad’. She is expressing that she would rather be forgotten if that is the way to make her husband remain happy as she doesn’t want to be remembered if it will make him sad. Rossetti’ symbolises her love for her husband because she couldn’t bare him being sad by remembering her, therefore giving an optimistic image of their relationship. Rossetti also expresses sorrow images ‘Gone far away into the silent land. When you can no more hold me by the hand’ portrays that when she dies she will go to a silent land where she will be all alone, in comparison to when she is alive she can hold her husband’s hand, this reminding him that when she dies they will be separated forever. This is a sad image because it implies that their close bond will be split for eternity. The sadness is emphasised further because their relationship together was obviously true love yet now it is near its end. Marvell uses death in his persuasion, ‘Time’s winged chariot hurrying near’ A downbeat quote persuading the young lady that if they do not have sex that soon times winged chariot will collect them. He is implying it will be too late if they wait as eventually they will get old and die. Marvell personifies time as a chariot and I think his meaning is that a chariot collects people once they die and as they age the chariot gets nearer and so tries to put across this image to the woman. Marvell attempts to persuade the young lady that he will spend an age to admire each part of her and at the very end of the admiration she will love him back. He then says that she deserves no less than this and that he will never give her less than what she deserves. ‘An age at least to every part and the last age should show your heart: for lady, you do not deserve this state; nor would I love at lower rate’ this quote is not intimidating, like most of the poem I think he says it so the young lady thinks he is a good man. I don’t think Marvell wrote the poem because of his love for her, even though in some parts of the poem he tries to re-assure her that he does love her, instead I think he uses it to take advantage of her naivety – quote gives a pleasant image but has malicious intentions. I feel he says this only because writing about love is a good method when trying to lure her into bed and even though this quote may be deceiving she will probably not realise due to her young age. At the end of the poem Marvell tells the young lady that he would rather die than be without her ‘Rather at once our time devour than languish in its slow-chapped power’ Lines 39-40. This gives an image that he would rather all his time go, and would prefer to die than be without her because he would have to suffer in times power as his life would seem to be going slower if he wasn’t with her. As this quote is written in the concluding lines of the poem it continues to lead your thoughts to think he uses love as a means of enticing her into doing what he wants and to trick her into believing that he’d rather die than be without her. In the poem ‘Since there’s no help†¦Ã¢â‚¬â„¢ there are a lot of negative images with few positive ones. This is due to the fact that love is dying out compared to Marvell’s poem in which the man wants the lady to believe he is in love with her, so if he expresses too many negative images then she would be less likely to believe him, different in that of Rossettis poem in which the relationship is very strong but the circumstances are of the person dying and not the love and by this she portrays how much love she has for him. In the opening lines Drayton tells the lady he wants nothing more to do with her ‘you get no more of me’ even the phrase itself gives you the image that he doesn’t want them to be together any longer. He continues to feel bitter and depressed and he reflects his mood in the negative images he gives in the poem. ‘I am glad, yea, glad with all my heart, that thus so cleanly I myself can free’ Drayton is almost trying to persuade her and himself that he doesn’t love her anymore and that he can be free of her, if their relationship ends. I don’t think Drayton does want the relationship to end but says this because he feels that he has no choice and doesn’t want to give his partner the impression that he would forgive her, whatever she does, otherwise she will take him for granted. Structure Marvell, Drayton and Rossetti all use rhyming couplets in the structure of their poems and this makes the poem easy and interesting to read. If it excluded the rhyming couplets reading the poem would be dull and the poet’s message would probably be lost in what would sound more like a speech. Drayton and Rossetti both wrote traditional love poems, the differences being that Rossetti wrote about the great amount of love between a couple and Drayton wrote about the lack of love in the relationship. Both poems include only 14 lines as opposed to the 46 of Marvell’s poem, however, all three poems work well. I felt Marvell chose to write a longer poem so he could properly express the argument and message it contained whereas I felt Rossetti and Drayton chose the shorter structure would be the most efficient way to explain what they wanted as they may have felt that choosing a longer structured poem to end a relationship or to express someone’s feelings would make the poem dull and boring. The difference between Rossetti’s and Drayton’s traditional love poems is that Rossetti split the poem into two stanzas; one with 6 lines and the other with 8 and thus uses the structure of a Petrachan sonnet whereas Drayton used the Shakespearean Iambic Pentameter which contains what would now be 10 syllables per line. Rossetti and Drayton writing a sonnet is evidence that they must love their partner. To write a sonnet to someone puts across the fact that you love them through the structure alone because of it being a traditional love poem. Language / Tone Marvell wrote his poem with persuasive and argumentative language. He tries to pressurise the person it is written for by consistently using death in his argument. At the beginning he says that there is no time to be coy but later says the opposite by saying ‘if you please, refuse till the conversion of the Jews’. As Jews are renowned for the pride they have in their religion he may feel there is not much chance of his succeeding with the young lady unless he poses this argument to change her opinion. Marvell tries to allure the young woman into having sex by using shock tactics ‘Then worms shall try that long-preserved virginity and your quaint honour turn to dust and into ashes all my lust’ Notice the language that he uses, as opposed to saying that someone else will take her virginity he gives her the image of her losing it to worms once she dies. This is a horrific image and using this destructive image it is far more effective because of the message behind it. Rather than using kindness to persuade his mistress into having sex he tries to scare her and in using such a forceful phrase on someone he claims to love further confirms his intimidation of this poor innocent girl. In comparison Rossetti wrote her poem in a more relaxed way but still with an important point to make. This is because she was writing it to someone who she has loved for most her life, however, she still wanted to persuade him not to grieve. Remember is repeated throughout the poem, this is because she wants to be remembered but doesn’t want to be mourned. Her message is expressed when she writes ‘Only remember me; you understand’ and ‘and afterwards remember, do not grieve’ both these quotes found in the second stanza of her poem prove that she doesn’t want him to forget her nor grieve. Rossetti, unlike Marvell, didn’t write on her own behalf as Rossetti wrote solely for her husband and mentioned herself rarely in the poem, I felt this was sad as she is the one dying but she didn’t want to meake her husband feel more upset so she couldn’t tell him how she was really feeling. You can tell she loved her partner and that the poem was written with good intentions. Drayton wrote his poem in such a way that it seemed that he was trying to persuade himself that he would be better off ending the relationship as well as telling his partner that their relationship had finished. Draytons intitial message to his partner is that their relationship is worth nothing, however, at the end begins to realise the love he has for her and so tells her the love may come back and as he does this the message at the end is very similar to the message expressed by Rossetti ‘when all have given him over, from death to life thou might’st him yet recover’ Drayton, talking about love personifying, hints that the love may come back to their relationship and may this happen his relationship could be similar to Rossettis loving relationship with her husband. My response to the poems My feelings about each poem differ; I feel the poem by Rossetti is sad as you can tell the relationship was strong and the poem was written to give her husband strength to go on after her death and remember the good things once she’s dead. It is effective as you know they had a good relationship because information such as their planned future together can be taken from the poem ‘no more day by day you tell me of the future that you planned’. It is also sad because she showed no self pity and so makes you feel sorry for her husband who wouldn’t know how his wife felt about her nearing death. My feelings about Marvells poem are completely different. I think this poem is quite threatening and harsh. He tells the young lady in the poem that she has to make her decision before she is old and ugly as he will no longer love her. I think he is also mean to write a poem in the persuasive language he does because she is young and naà ¯Ã‚ ¿Ã‚ ½ve and he uses this to his advantage. The horrific images he portrays further prove that he uses love falsely because if he did love her he wouldn’t scare her into having sex against her will. ‘Then worms shall try that long-preserved virginity and your quaint honour turn to dust and into ashes all my lust’ This illustrates the extremes the speaker is prepared to go to in order to get what he wants, he is trying to give her negative thoughts of what will happen if she rejects him. As mentioned before, the poem was written in the 17th century in an era which girls normally married as virgins and usually at a very young age. Marvell uses this to his advantage by continuing to express, what I think, is false love because by getting her to believe he is in love with her he feels he stands a greater chance of her losing her virginity to him. I felt sorry for Drayton after reading his poem because I felt he wrote it after finding out about his partner’s affair and this would account for his harsh way of ending their relationship and angry tone used when ending it. However, to tell his partner that he can be free without her is surprising, especially when at the end of the poem he says the love may come back. I think Drayton wrote this poem on the back of an affair his partner had been having, ‘Now at the last gasp of loves latest breath, when, his pulse failing, passion speechless lies, when faith is kneeling by his bed of death’. The phrase speechless lies could be a reflection of the times she lied to him while having the affair and faith kneeling by deaths bed shows that along with the love, faith had also left the relationship giving further reason to think she had an affair. Aswell as this Drayton lets his partner know that the love in their relationship is dying and has nearly gone completely, by saying that it is taking its last gasp of breath. Shortly after, Drayton gives his partner the impression that the love may come back. ‘Now, if thou would’st, when all have given him over, from death to life thou might’st him yet recover’. This quote gave me the feeling that the relationship could come back giving reason to believe that the poem was written as retaliation after finding out about an affair. Understandably he would be distraught and so uses the harsh images mentioned in the early stages of the poem but finally ending by realising the amount of love he has for his partner and so says that they might be able to overcome this and love each other again. The poem I preferred Overall the poem that I most preferred was Draytons poem ‘Since theres no help†¦Ã¢â‚¬â„¢ This is because unlike Marvells poem it isn’t as long and is kept to a simple 14 line structure. I feel that this made it easier to understand as opposed to Marvells longer poem. Even though the longer length may have added more detail I found this made it far easier to lose interest. Rossettis poem, like Draytons, was short, however, I liked the way Drayton personified love throughout his poem by expressing loves life in his relationship. I disliked the overuse of ‘remember’ in Rossettis poem, even though it was obviously intentional, I thought it made the poem repetitive with Rossetti continually telling her husband what to remember and remember what not to do. However, I did think that Marvells poem was strong in its persuasiveness and thought it would probably be successful in taking advantage of the young girl, which was the purpose of him writing it. Another reason for my preference of Draytons poem is that it questions the strength of the relationship and whether feelings can be turned off so easily.

Stress and Self Esteem

In recent studies philosophers have discussed whether stress and self-esteem have any relations to one another. Does the effect of a person’s stress affect their self esteem? It might seem that a person with low self esteem could be the effects of a high level of stress. Self-Esteem affects everyone, especially teenagers. The articles suggest that there may be other factors that influence stress and self esteem. Introduction â€Å"The Merriam-Webster dictionary defines stress as a physical, chemical, or emotional factor that causes bodily or mental tension and may be a factor in disease causation.It may seem confusing but everyone has dealt with stress in their lifetime. Stress is something that is not diagnosed by a doctor, but when a person is stressed, they can definitely feel it (R. , Jill, 2012, par 2). What is self esteem? It is the opinion you have for yourself and your value as a person. Self confidence is also a major role in self esteem. Studies have shown that ther e is a negative relationship between self esteem and stress. It was also found that self esteem appears to control the effects of stress on psychological functioning.Those with low self esteem distribute more of a higher stress level than those with a high self esteem. By having a high self esteem it makes dealing with stress easier. High self esteem may protect the individual from distress by allowing the individual to feel less vulnerable and help them rise up from difficult situations. High self esteem may also result in more active and effective coping and in enhanced motivation in response to stress (Abel, 1996). Individuals have their own way they deal with stress and their self esteem.Stress and self esteem have relations to one another but people deal with things differently. â€Å"Another study examined self esteem as a moderator of the influence of perceived stress and coping on symptoms of depression in a sample of 713 college students. The results suggest that self este em may play an important role in the development of depressive symptoms in college students through interactions with perceived stress and coping (Eisenbarth, 2012, par. 1). † If an individual does not see them self as worthy, or important, a rise in stress is likely to occur (Eisenbarth, 2012).I believe the strength of the relationship between the two variables is a medium. Even though research suggests that stress and self esteem do not have such a close connection, I think self esteem and stress are closely connected because every person handles stress differently. If a person has a high level of stress and a low self esteem, it may cause his or her self esteem level drop even more. College students tend to have a higher stress level which could lead to serious depression disorders. The transactional model of stress and coping forwarded by Lazarus and Folk-man (1984) defines stress as an imbalance between people’s perception of the demands placed upon them and their interpretation of the resources available to cope with those demands (Esienbarth, 2012, par 3).† Those with higher levels of self esteem may take stress more lightly, while those with low self esteem may only see the negative sides of the stress which could cause their stress to heighten even more. â€Å"A United States study shows that forty three percent of adults suffer adverse health effects from stress (Hall, 2012, par 2). If an individual has a high self esteem and recently suffers from a lot of stress can cause the persons self esteem to go from high to low. Having a low self esteem can lead to weight gain and depression. If a person does not get help when suffering stress or self esteem problems, it could eventually lead to health problems. Researchers found that there is a strong relationship between how someone copes with stress and self esteem. People with low self esteem are more likely to view their behavior as being dependent on the situation while people with h igh self esteem have a greater ability to connect in a wide range of coping behaviors.Why do people with low self esteem view their coping behavior more as self-dependent? It has been suggested that self esteem influences coping because it is so strongly related to personal preferences which they use for their own differences and outcomes (Abel, 1996). It may be that peoples coping styles reflect their self esteem, but they could also be building a barrier that could make their self esteem crash. If a person continuously worries about their self esteem and how to cope with it, the more stressed and anxious they may become.Self esteem is not as important as self acceptance. Many people argue that self esteem and self acceptance are the same thing, however to some people they disagree (R. , Jill, 2012). Things people need to do to make themselves feel better is to learn to accept themselves for who they are and not what you expect yourself to be. Everyone does good and bad things. Str ess and self esteem are handled differently by everyone. Building a high self esteem can take years to complete and when they face stress it doesn’t affect them as much as it does a person with low self esteem.By having high self esteem it makes dealing with situations easier. People with low self esteem seem to be shy, quiet, and self conscious about themselves and when they have high levels of stress they tend to keep to them self and cope with it on their own (R. , Jill, 2012). There are many different ways of coping with stress because everyone has it. Stress is a normal situation for people and everyone deals with it their own ways. Even though research says stress and self esteem have little to do with each other, there have not been a lot of studies to prove it.In conclusion, Stress and self esteem have little to do with how people deal with or perceive the levels of stress in their lives. It has more to do with other factors such as coping styles and self concept. The purpose of this correlation essay was to research that people with high self esteem see themselves to have lower levels of stress than those with low self esteem and people who have low self esteem perceive themselves to have high levels of stress than those with high self esteem (Eisenbarth, 2012).References Abel, M. H. (1996). Self-Esteem: Moderator of mediator between perceived stress and expectancy of success. Psychological Reports, 79, 635-641. Eisenbarth, Chris. (2012). Does Self-Esteem Moderate the Relations among Perceived Stress, Coping, and Depression? College Student Journal, 46, 149-157. Retrieved from http://www. nclive. org. Hall, Joanna. (2012). Outsmart Stress. Good Health, 72-74. Retrieved from http://www. nclive. org. R. , Jill. (2012) Stress and Self Esteem. Retrieved from http://www. ourstressfullives. com

Famous Ancient Greek Sculptors

Famous Ancient Greek Sculptors These six sculptors (Myron, Phidias, Polyclitus, Praxiteles, Scopas, and Lysippus) are among the most famous artists in ancient Greece. Most of their work has been lost except as it survives in Roman and later copies. Art during the Archaic Period was stylized  but became more realistic during the Classical Period. The late Classical Period sculpture was three dimensional, made to be viewed from all sides. These and other artists helped move Greek art - from Classic Idealism to Hellenistic Realism, blending in softer elements and emotive expressions.   The two most commonly cited sources for information about Greek and Roman artists are the first century CE writer and scientist Pliny the Elder (who died watching Pompeii erupt) and the second century CE travel writer Pausanias. Myron of Eleutherae 5th C. BCE. (Early Classical Period) An older contemporary of Phidias and Polyclitus, and, like them, also a pupil of Ageladas, Myron of Eleutherae (480–440 BCE) worked chiefly in bronze. Myron is known for his Discobolus (discus-thrower) which had careful proportions and rhythm. Pliny the Elder argued that Myrons most famous sculpture was that of a bronze heifer, supposedly so lifelike it could be mistaken for a real cow. The cow was placed at the Athenian Acropolis between 420–417 BCE, then moved to the Temple of Peace at Rome and then the Forum Taurii in Constantinople. This cow was on view for nearly a thousand years - the Greek scholar Procopius reported that he saw it in the 6th century CE. It was the subject of no less than 36 Greek and Roman epigrams, some of which claimed that the sculpture could be mistaken for a cow by calves and bulls, or that it actually was a real cow, attached to a stone base. Myron can be approximately dated to the Olympiads of the victors whose statues he crafted (Lycinus, in 448, Timanthes in 456, and Ladas, probably 476). Phidias of Athens c. 493–430 BCE (High Classical Period) Phidias (spelled Pheidias or Phydias), the son of Charmides, was a 5th century BCE sculptor known for his ability to sculpt in nearly anything, including stone, bronze, silver, gold, wood, marble, ivory, and chryselephantine. Among his most famous works is the nearly 40-foot tall statue of Athena, made of chryselephantine with plates of ivory upon a core of wood or stone for the flesh and solid gold drapery and ornaments. A statue of Zeus at Olympia was made of ivory and gold and was ranked among one of the Seven Wonders of the Ancient World. The Athenian statesman Pericles commissioned several works from Phidias, including sculptures to celebrate the Greek victory at the Battle of Marathon. Phidias is among the sculptors associated with the early use of the Golden Ratio, the Greek representation of which is the letter Phi after Phidias. Phidias the accused of trying to embezzle gold  but proved his innocence. He was charged with impiety, however, and sent to prison where, according to Plutarch, he died. Polyclitus of Argos 5th C. BCE (High Classical Period) Polyclitus (Polycleitus or Polykleitos) created a gold and ivory statue of Hera for the goddesss temple at Argos. Strabo called it the most beautiful rendering of Hera hed ever seen, and it was considered by most ancient writers as one of the most beautiful works of all Greek art. All his other sculptures were in bronze. Polyclitus is also known for his Doryphorus statue (Spear-bearer), which illustrated his book named canon (kanon), a theoretical work on ideal mathematical proportions for human body parts and on the balance between tension and movement, known as symmetry. He sculpted Astragalizontes (Boys Playing at Knuckle Bones) which had a place of honor in the atrium of the Emperor Titus. Praxiteles of Athens c. 400–330 BCE (Late Classical Period) Praxiteles was the son of the sculptor Cephisodotus the Elder, and a younger contemporary of Scopas. He sculpted a great variety of men and gods, both male and female; and he is said to have been the first to sculpt the human female form in a life-sized statue. Praxiteles primarily used marble from the famous quarries of Paros, but he also used bronze. Two examples of Praxiteles work are Aphrodite of Knidos (Cnidos) and Hermes with the Infant Dionysus. One of his works that reflects the change in Late Classical Period Greek art is his sculpture of the god Eros with a sad expression, taking his lead, or so some scholars have said, from a then-fashionable depiction of love as suffering in Athens, and the growing popularity of the expression of feelings in general by painters and sculptors throughout the period. Scopas of Paros 4th C. BCE (Late Classical Period) Scopas was an architect of the Temple of Athena Alea at Tegea, which used all three of the orders (Doric and Corinthian, on the outside and Ionic inside), in Arcadia. Later Scopas made sculptures for Arcadia, which were described by Pausanias. Scopas also worked on the bas-reliefs that decorated the frieze of the Mausoleum at Halicarnassus in Caria. Scopas may have made one of the sculptured columns on the temple of Artemis at Ephesus after its fire in 356. Scopas made a sculpture of a maenad in a Bacchic frenzy of which a copy survives. Lysippus of Sicyon 4th C. BCE (Late Classical Period) A metalworker, Lysippus taught himself sculpture by studying nature and Polyclitus canon. Lysippus work is characterized by lifelike naturalism and slender proportions. It has been described as impressionistic. Lysippus was the official sculptor to Alexander the Great. It is said about Lysippus that while others had made men as they were, he had made them as they appeared to the eye. Lysippus is thought not to have had formal artistic training but was a prolific sculptor creating sculptures from tabletop size to colossus. Sources Bellinger, Alfred R. The Late Bronze of Alexandria Troas. Museum Notes (American Numismatic Society) 8 (1958): 25–53. Print.Corso, Antonio. Love as Suffering: The Eros of Thespiae of Praxiteles. Bulletin of the Institute of Classical Studies 42 (1997): 63–91. Print.Lapatin, Kenneth, D. S. Pheidias. American Journal of Archaeology 101.4 (1997): 663–82. Print.Palagia, Olga. Pheidias Epoiesen: Attribution as Value Judgement. Bulletin of the Institute of Classical Studies. Supplement.104 (2010): 97–107. Print.Squire, Michael. Making Myrons Cow Moo? Ecphrastic Epigram and the Poetics of Simulation. The American Journal of Philology 131.4 (2010): 589–634. Print.Stewart, Andrew. Praxiteles. American Journal of Archaeology 111.3 (2007): 565–69. Print.Waldstein, Charles. The Argive Hera of Polycleitus. The Journal of Hellenic Studies 21 (1901): 30–44. Print.Wycherley, R. E. Pausanias and Praxiteles. Hesperia Supplements 20 (1982): 182–91 . Print.

Understanding the Heisenberg Uncertainty Principle

Understanding the Heisenberg Uncertainty Principle Heisenbergs uncertainty principle is one of the cornerstones of quantum physics, but it is often not deeply understood by those who have not carefully studied it. While it does, as the name suggests, define a certain level of uncertainty at the most fundamental levels of nature itself, that uncertainty manifests in a very constrained way, so it doesnt affect us in our daily lives. Only carefully constructed experiments can reveal this principle at work.   In 1927, the German physicist Werner Heisenberg put forth what has become known as the Heisenberg uncertainty principle (or just uncertainty principle or, sometimes, Heisenberg principle). While attempting to build an intuitive model of quantum physics, Heisenberg had uncovered that there were certain fundamental relationships which put limitations on how well we could know certain quantities. Specifically, in the most straightforward application of the principle: The more precisely you know the position of a particle, the less precisely you can simultaneously know the momentum of that same particle. Heisenberg Uncertainty Relationships Heisenbergs uncertainty principle is a very precise mathematical statement about the nature of a quantum system. In physical and mathematical terms, it constrains the degree of precision we can ever talk about having about a system. The following two equations (also shown, in prettier form, in the graphic at the top of this article), called the Heisenberg uncertainty relationships, are the most common equations related to the uncertainty principle: Equation 1: delta- x * delta- p is proportional to h-barEquation 2: delta- E * delta- t is proportional to h-bar The symbols in the above equations have the following meaning: h-bar: Called the reduced Planck constant, this has the value of the Plancks constant divided by 2*pi.delta-x: This is the uncertainty in position of an object (say of a given particle).delta-p: This is the uncertainty in momentum of an object.delta-E: This is the uncertainty in energy of an object.delta-t: This is the uncertainty in time measurement of an object. From these equations, we can tell some physical properties of the systems measurement uncertainty based upon our corresponding level of precision with our measurement. If the uncertainty in any of these measurements gets very small, which corresponds to having an extremely precise measurement, then these relationships tell us that the corresponding uncertainty would have to increase, to maintain the proportionality. In other words, we cannot simultaneously measure both properties within each equation to an unlimited level of precision. The more precisely we measure position, the less precisely we are able to simultaneously measure momentum (and vice versa). The more precisely we measure time, the less precisely we are able to simultaneously measure energy (and vice versa). A Common Though the above may seem very strange, theres actually a decent correspondence to the way we can function in the real (that is, classical) world. Lets say that we were watching a race car on a track and we were supposed to record when it crossed a finish line. We are supposed to measure not only the time that it crosses the finish line but also the exact speed at which it does so. We measure the speed by pushing a button on a stopwatch at the moment we see it cross the finish line and we measure the speed by looking at a digital read-out (which is not in line with watching the car, so you have to turn your head once it crosses the finish line). In this classical case, there is clearly some degree of uncertainty about this, because these actions take some physical time. Well see the car touch the finish line, push the stopwatch button, and look at the digital display. The physical nature of the system imposes a definite limit upon how precise this can all be. If youre focusing on try ing to watch the speed, then you may be off a bit when measuring the exact time across the finish line, and vice versa. As with most attempts to use classical examples to demonstrate quantum physical behavior, there are flaws with this analogy, but its somewhat related to the physical reality at work in the quantum realm. The uncertainty relationships come out of the wave-like behavior of objects at the quantum scale, and the fact that its very difficult to precisely measure the physical position of a wave, even in classical cases. Confusion about the Uncertainty Principle Its very common for the uncertainty principle to get confused with the phenomenon of the observer effect in quantum physics, such as that which manifests during the Schroedingers cat thought experiment. These are actually two completely different issues within quantum physics, though both tax our classical thinking. The uncertainty principle is actually a fundamental constraint on the ability make precise statements about the behavior of a quantum system, regardless of our actual act of making the observation or not. The observer effect, on the other hand, implies that if we make a certain type of observation, the system itself will behave differently than it would without that observation in place. Books on Quantum Physics and the Uncertainty Principle: Because of its central role in the foundations of quantum physics, most books that explore the quantum realm will provide an explanation of the uncertainty principle, with varying levels of success. Here are some of the books which do it the best, in this humble authors opinion. Two are general books on quantum physics as a whole, while the other two are as much biographical as scientific, giving real insights into the life and work of Werner Heisenberg: The Amazing Story of Quantum Mechanics by James KakaliosThe Quantum Universe by Brian Cox and Jeff ForshawBeyond Uncertainty: Heisenberg, Quantum Physics, and the Bomb by David C. CassidyUncertainty: Einstein, Heisenberg, Bohr, and the Struggle for the Soul of Science by David Lindley