How Does Facebook Impact on Your Life Essay Example for Free

How Does Facebook Impact on Your Life Essay What is the most popular social network in the world? I believe that most people prefer the answer â€Å"Facebook†. Nowadays, there are more and more people join the Facebook. You can always see such situations that some people refresh their Facebook when they have nothing to do, and there are some people even only use Facebook to keep in touch with others. Actually, Facebook has already become a part of our life; and it changed our lives in four aspects: it changed our online life, relationships with our parents, relationships with our friends, and also eased our feeling of loneliness. The first aspect is that Facebook fulfilled our Internet lives. Do you still remember what did you usually do on the Internet before the Facebook was invented? Use my own experience for example; before the Facebook was invented, I only use the basic functions of the Internet, such as check the emails, look for some news on the Internet, sometime I also play some online games. At that time, I prefer to watch TV rather than surf the Internet. However, after the Facebook was invented, my online life changed. When I surf the Internet, the first thing I have to do is check my Facebook, because many of my friends who changed their states everyday. From their states I can know what happened to my friends. Sometimes I can also share some interesting videos and pictures to my friends, it also made me feel closer with my friend. Actually, not only myself, but also other teenagers have the similar situations. In â€Å"Facebook is a major influence on girls, says survey†, Sean Coughlan (2010) reported that there is a survey based on 3000 parents and 1000 children in the UK, and they found that Facebook made a big influence on children, especially on girls. In that survey, children are asked to list three important things in their life. The result shows that 41% of the girls and 17% of the boys believe that technology is one of the biggest influences, and many girls regard the Facebook as their important part in their life. They believe that Facebook is more important than TV, magazines and even their brothers or sisters. It sounds a little crazy, however, it is true that Facebook has already changed our Internet life. In fact, Facebook didn’t only change our Internet life, but also create a new way to communicate with your parents and friends. As there are more and more teenage Facebook users, many parents try to communicate with their kids through Facebook. However, is it an effective way to use Facebook to get closer with their child? In â€Å"Student’s Facebook ‘friends’: public and private spheres†, Anne West, Jane Lewis and Peter Currie (2009) analysis that most teens feel weird when adults have Facebook. Huffington Post (2007) use a student’s words as example, the student said that if his or her parents know so much about his or her Facebook activities, he or she will has a feel that his or her parents want to know the secrets between his or her friends. He or she wants his or her parents could understand that Facebook profile is prepared for people who are sharing his or her experience (cited in West, Lewis Currie, 2009). From this example, we can see that many teenagers don’t like adding their parents as friends. They want a world that they can chart with their friends without worrying about their parents. However, there are still many teenagers believe that Facebook is a good way to communicate with their parents. For instance, there is a girl noted that her mother just got into Internet for few days and her mother likes to see her photos. The girl believes that it is a good way to keep in touch with her mother (West, Lewis Currie, 2009). In another case, there is a friend of mine insist on communicating with his mother through the Internet. They believe that add each other as a Facebook friend is a symbol of reliance. My friend likes to update some photos with his friends, and his mother likes to share some tips in daily life with Facebook. With the help of Facebook, their relationship became better and better. As there are more and more people who know how to use Internet, we need to believe that one day, parents can get closer with their kid by using Facebook. Facebook does not only change our relationships with our parents, but also with our friends. Before the Facebook was invented, maybe the most common way to communicate with others is cellphone. You can text or phone others. However, with the birth of the Facebook, we have a new way to communicate with our friends. In â€Å"Me and My 400 Friends: The Anatomy of College Students’ Facebook Networks, Their Communication Patterns, and Well-Being†, Manago, Taylor and Greenfield (2012, pp. 374) did a survey on 400 people. According to their study, the average time that people spend on the Facebook is a little over an hour, and 80% of the people would log in the Facebook many times a day. Most people would like to update their status a few times a week. Status is most common use of the Facebook. From our friends’ statues we can know more about our friends’ life. To some degree, it is a kind of communication when you see your friends’ statue and leave a comment under their statue. According to Manago, Taylor and Greenfield’s study, the most common statues are others’ emotion condition (51% of participants). Then the second and the third most common statue is â€Å"what you a doing† and â€Å"vent frustration†. Therefore, we can easily know something from others’ statue. That is why Facebook provide us a new way to communicate with our friends. Actually, most young people like to use Facebook to keep in touch with their friends. Use my friends for example; Dale and Ronda are young couple with two kids. They like to go vocation in holidays. Each time when they come back they will update their statues and photos. It makes them feel closer with their friends. From these examples we can see that Facebook really changed our relationship with our friends a lot. The forth aspect that Facebook influent our life is that Facebook can ease our feeling of loneliness. In the article â€Å"Is Facebook Making Us Lonely? †, Marche (2012, P. 62) points out that Americans are much more lonely than ever before. In 1950, only less than 10% of the homes have only one person. However, by 2010, nearly 27% of the homes have only one person. From these information we can see that people became more and more lonely, because many of them living alone, they don’t have somebody to talk with them. That is the problem, and Facebook can solve this problem perfectly. Although you could not live with your friends, you could communicate with them through Facebook. Marche (2012, P. 64) also reported that in 1985, only 10% of the Americans had no one to talk about vital matters. However, by 2004, the year when Facebook launched, 25% Americans had no one to talk to. To solve this problem, Facebook provides a platform that you can discuss important matters with others. Facebook is not only a social networking, but also a â€Å"medicine† which can reduce the feeling of loneliness. There are some people argue that the motive for using Facebook may impact on loneliness. For instance, some people may addict to Facebook, so they prefer to use the Internet to communicate with others but not talk to others in reality. About this point, Mathew Ingram, an excerpt from BusinessWeek blog post, explains that Facebook would not promote connections in real world. He met many friends from Internet. He agrees that there are people became lonelier because of using the Internet, just like many lonely people like to watch a lot of late-night TV show. However, it doesn’t mean that Facebook causes loneliness (cited in Marche, 2012, P. 17). From the information above, we can see that Facebook really changed our life. In conclusion, Facebook changed our life in many aspects. It does not only add more happiness on your Internet life, but also make your relationships with others better. In the modern world, people became lonelier and lonelier. With the help of the Facebook, we can meet more new friends; we can keep in touch with our old friends, it can also help us to get out from the shadow of the loneliness. Facebook or social networking has already been a part of our life. Therefore, all we need to do is to make good use of the Facebook and let it serve us in a better way.

Comparing Female Characters in Euripides Medea and Sophocles Oedipus

Comparing Female Characters in Euripides' Medea and Sophocles' Oedipus the King and Antigone      Ã‚  Ã‚   In the times of the ancient Greeks, women had an unpretentious role. They were expected to do take on the accepted role of a woman.   In most cases, a woman's role is restricted to bearing young, raising children, and housework. In Sophocles' Oedipus   the King, Antigone, and Medea, the dominant female characters impacted upon men with authority and political power.   It is an inescapable fate that one of these characters will fall, and that the Gods have control over everyone's fate.   Each dominant female character portrays her willpower and commitment to their beliefs.   This is what leads to the inevitable tragedy.      Ã‚  Ã‚  Ã‚  Ã‚   In Oedipus the King, Jocasta, is Oedipus' wife and the sister of Creon. She became a part of doomed Theban dynasty when she married Laius, the King of Thebes.   As a result, the marriage had brought together two branches of the family of Cadmus and seemed to guarantee political strength.   She became disappointed because she was unable to produce an heir to the throne.   Seeking a solution, Lauis went to the oracle at Delphi and asked how the proble might be overcome.   Instead, the oracle proclaimed that the son born to Jocasta would be his murderer.   Upon hearing the prophecy, Lauis rejected all women.   This infuriated Jocasta and she had gotten Lauis drunk, and slept with him.   This proves that Jocasta refuses to be outdone, even by her husband.   When Jocasta had given birth to a baby boy (Oedipus), Lauis had it sent away by a messenger to die of exposure high in the mountains.   A shepherd discovered the boy ... ...crowd of subservient women. Works Cited and Consulted Euripides.   "Medea."   The Norton Anthology of World Masterpieces.   Ed. Sarah Lawall.   New York and London:   W. W. Norton & Company, 1999.   McDermott, E A (1989) Euripides' Medea: The Incarnation of Disorder. Pennsylvania State University:USA Woodard,   Thomas.   Sophocles: A Collection of Critical Essays, Englewood Cliffs, NJ: Prentice-Hall, Inc., 1966. Sophocles. Antigone. Exploring Literature: Writing and thinking About Fiction, Poetry, Drama, and the Essay. Ed. Joseph Terry. New York: Addison-Wesley Educational Publishers Inc, 2001. Sophocles.   "Oedipus Rex."   An Introduction to Literature, 11th ed.Eds. Sylvan Barnet, et al.   New York: Longman, 1997. Watling, E. F.. Introduction. In Sophocles: The Theban Plays, translated by E. F. Watling. New York: Penguin Books, 1974.

Measuring the Creep of Lead

This laboratory explores the phenomenon of creep. Creep is a slow continuous deformation within a material in response to increasing time, a constant applied stress and an elevated temperature. Here in this laboratory lead is chosen as the test metal as it is shown to have poor resistance to creep and also has a relatively low melting temperature. Applications Engineers are interested in the creep properties and stability of materials when designing specific parts and assemblies. Creep machines such as the one used in the laboratory are used by Engineers to determine these material properties. Creep causes many problems to the Engineer in design. They need to determine that the materials they use will stay within the required creep limits for the lifetime of the component. Creep is particularly important in the design components that need to withstand high temperatures. Creep will occur in metals at a faster rate as the temperature increases. These design considerations fall into four different applications:[1] Displacement limited applications are where dimensions must be precise with small clearances and little error. The small clearances must be maintained at high temperatures. An example of this type of application is in the turbine rotors of jet engines. Rupture limited applications are where precise dimensions are not particularly essential. However it is essential that fracture cannot occur to the material. An example of this is the need for high pressure steam tubes and pipes to withstand any break in their structure. Stress relaxation limited applications are needed where the initial tension in component relaxes with time. An example of where this application occurs is in the pretensioning of cables on bridges or in the pretensioning of bolts. Buckling limited applications of creep are needed in slender columns or panels which carry compressive loads. An example of this type of application would be in a structural steelwork that is exposed to fire. Objectives The objective is to witness the creep properties in lead. To achieve this creep tests are performed on lead specimens. Three creep tests are carried out using three different lead specimens. The load is varied in each of the three tests and observations are made on the results. Theory Creep Creep is a time dependent deformation that occurs under a constant applied load and temperature. The rate of creep is influenced by temperature and creep generally occurs at a high temperature. Creep then is a function of stress, time and temperature. The lowest temperature at which creep can occur in a given material is generally , where Tm is the melting temperature of the material in degrees Kelvin. Total engineering creep strain can be expressed by the following formula: Where ÃŽ µ is the theoretical stress, is the change in the materials length and is the materials original length. The strain rate describes the rate of change in the strain of a material with respect to time. Where is the strain rate; is the change in strain and is the change in time. The rate of deformation caused by creep is called the creep rate. The creep rate for a material with a constant stress and constant temperature can be calculated using the following formula: Steady State Creep Rate: Where Q is the activation energy; n is the stress exponent; A is a material constant; R it the universal gas constant and T is the temperature in degrees Kelvin. The activation energy Q can be determined experimentally, by plotting the natural log of creep rate against the reciprocal of temperature. The gradient of the subsequent slope is equal to. Fig. 1 – Natural log of strain rate against reciprocal of temperature. [2] For this experiment we are using a constant temperature for the three specimens. The Arrhenius equation can then be simplified to give a power law relationship: Where A is a constant that depends on the given material. Rearranging this equation the material constant A can be found: The value of A can also be found by plotting the natural log of the strain rates against the natural log of the applied stress values. Here the value of A is equal to the exponential of the intercept of the line created by this plot. The stress exponent n can be determined by plotting the natural log of the strain rate against the natural log of the applied stress. The gradient of this slope is equal to the stress exponent n. Fig. 2 – Natural log of strain rate against natural of applied stress [2] The stress component n is defined by the following equation: Stages of Creep Primary creep occurs at the initial stages of creep. In this stage the strain rate is relatively higher and then begins to gradually decrease. Secondary creep is also called the steady state creep stage. This occurs after the primary creep stage and the creep rate changes to a constant. In this stage there is no increase or decrease in the creep rate. Tertiary creep is the last stage of creep. The creep rate moves from the steady state of the secondary stage to a continuous increase. The creep rate progressively increases until the material reaches its breaking point and it ruptures. Materials Fig. 3 – Analogue Creep Testing Machine – Not used in experiment [3] * Lever-arm creep testing machine. * Various â€Å"dead-weight† masses. For this experiment there were 1.0, 1.2 and 1.4 kg masses. * Various lead creep specimens compatible with the creep testing machine. Similar to that in Fig. 4. * Linear Variable Displacement Transducer in contact with the lever. * Analogue to Digital convertor in the form of a PCI card. * Data logging computer program. * Computer. Because the creep testing machine uses a lever similar to that in Fig. 3, a mechanical advantage takes place. This needs to be taken into consideration when analysing the results. The lever in the creep testing machine in the experiment has an 8:1 mechanical advantage. The machine pictured in Fig. 3 uses an analogue dial for recording displacement. The creep testing machine used in this experiment uses an LVDT transducer. This is in contact with the lever and sends displacement data to the A/D card in the form of electrical signals. Fig. 4 – Lead Creep Specimen [4] Method * The three lead specimens are measured for their length and cross sectional area. For the first of the three tests, a 1kg load level is selected. * The top end of the first specimen is installed in the top grip of the creep testing machine. * The bottom end of the specimen is installed in the lower grip of the creep testing machine. * The creep testing machine is zeroed. In this experiment zeroing wasn’t possible so the recorded displacement results were offset by 6.039. This was remedied by adding 6.039 to all recorded displacements. * The data logger program is started while choosing an appropriate file name. For this experiment ‘data1.txt’ was chosen for the first specimen. * The load is now applied to the specimen in the creep machine. The data logger will record the elapsing time and the deformation in the specimen. * The specimen will eventually rupture due to the increasing creep and at this stage pressing stop in the program will end the logging. * For the second specimen a load of 1.2kg is selected. A different filename is chosen in the data logger program. For this experiment ‘data2.txt’ was chosen for the second specimen. * The process is repeated until the specimen fails. * For the third and last specimen a 1.4 kg load is chosen. Again a different filename is selected in the data logger program. For this experiment ‘data3.txt’ was chosen for the third specimen. * The process is repeated for the last time until the specimen fails. * The results are then analysed as described below. Results Fig. 5 – Specimen 1 – Strain against Time with 1kg Fig. 6 – Specimen 2 – Strain against Time with 1.2kg Fig. 7 – Specimen 3 – Strain against Time with 1.4kg Fig. 8- Specimen 1 – Strain Rate against Time with 1kg Fig. 9 – Specimen 2 – Strain Rate against Time with 1.2kg Fig. 10 – Specimen 3 – Strain Rate against Time with 1.4kg Fig. 11 – Table of Values Calculated from Experimental Results Fig. 12 – Natural log of strain rate against natural of applied stress – 3 specimens (a) Estimationis made of the maximum applied stress that the material can withstand considering creep of less than 1% per year. Assuming 31,536,000 seconds in a year: The slope of the line in Fig. 12 gives the value for n. The exponential of the intercept of the line in Fig. 12 gives the value for A. Subbing for A and n and rearranging: (b) Estimation is made for the maximum applied stress considering a total time to failure of more than 10 years. Again an assumption of 31,536,000 seconds in a year is taken. For the strain at failure an average was taken from the data for specimens 1 and 2, giving 13.134. Subbing in for A and n and rearranging: Discussion From looking at the strain against time graphs, Fig. 5, 6, & 7, the different stages of creep can clearly be seen. In the primary stage the strain rate is relatively high and this can be seen visually by the steeper slope at this section on the graph. The slope in the primary stage then begins to decline indicating a decrease in the strain rate. This is despite the applied stress and temperature remaining constant. This can be explained by strain hardening occurring in the lead due to dislocations in the crystalline structure. Looking at these graphs it can be seen that their slopes reduce further to a minimum and for a time stay nearly constant. This is a visual indication of the secondary stage in the creep process where the strain rate becomes nearly constant. Here there is a recovery process in the lead due to thermal softening. The recovery balances the effect of the strain hardening causing the strain to reach its steady state. At the right hand side of the same graphs it can be seen that the slope increases. In Fig. 6 and Fig. 7 this is shown more clearly where the slope increases exponentially. This increase in slope after the steady state is a visual indication of the tertiary stage in creep. The increased strain rate, as visualised by the increasing slope, is caused by necking. The necking begins due to local variations in stress concentrations in the specimen due to microscopic differences, defects or impurities. After the necking the cross-sectional area of the specimen decreases resulting in rapidly increasing stress concentrations. This increases the strain rate exponentially leading to fracture. In figures 8, 9 and 10 where the strain rate is graphed against time, the secondary creep stage can be seen more clearly. Here the steady state creep rate is visualised by a straight line with a value of y = 0. In the same graphs the secondary stage is bordered by two spikes in the strain rate. The left hand side has a smaller spike due to no work hardening having occurred and the specimens reacting to the applied load. The strain rate then decreases as discussed earlier. The right hand side shows a much larger spike due to the exponentially increasing strain rate caused by the necking. The stress component n is defined by the following equation: The stress component is then found by calculating the slope of against as seen in Fig.12. The material constant A can be found on the same graph by calculating the exponential of the intercept. Alternatively A can be found rearranging the power law equation: Fig. 14 – Theoretical values for A against the experimental value. In Fig. 14 it can be seen the values for A when using the power law equation compared against the value of found from Fig. 12. The differences are negligible and can be explained by errors as discussed below. The results of the experiment then confirms the steady state creep law. Errors If the masses are applied suddenly to the machine it will have a higher resulting stress on the specimen compared to a mass applied more gently. This is due to impact loading and will cause a higher deformation and creep in the specimen. The precision of the machine used in the experiment will have a result on the error. Also over time a machine needs to be calibrated. In this experiment it was not possible to calibrate the machine so this needed to be compensated in calculation later. Any vibrations on the machine or the LVDT will impact on the readings. This can occur through impact loading resulting in cyclical loading vibrations or it might be outside forces such as a table being moved. As discussed earlier, the creep rate is impacted by temperature. Changes in temperature due to draft or other influences could result in a change in the creep rate. No two lead specimens are exactly the same. There will be minor differences due to impurities in the metal or small defects such as notches caused by wear. Due to the manufacturing of the specimens there could be minor differences in their shape and area. All of these differences will have an impact on the results. Friction in the creep testing machine will resist the stresses caused by the â€Å"dead-weight† masses. Ideally this friction will be at a minimum, however some friction will always still remain and this will be a source of error. Most of this friction will be concentrated at the fulcrum of the lever arm on the creep testing machine. Electromagnetic interference in the electrical circuitry can impact on the recordings from the LVDT. Also any stray components in the system such as parasitic capacitances will also cause some interference. Rounding errors in the software or algorithm or later by the user will result in cumulative errors.

Argumentative Essay The Pros And Cons Of Abortion

Abortion is defined as the deliberate termination of human pregnancy, most often performed during the first twenty-eight weeks. In South Carolina, abortion is legal which causes an ongoing controversy between those who agree and disagree. This is a sensitive subject that can get very heated. Pregnant women will argue that abortion is okay because a fetus does not feel pain, I totally disagree. There are certain circumstances that I understand why an abortion may be needed. Situations like emergency medical problems with the mother or baby could be a legit reason for an abortion One reason abortion is wrong is because you are not giving your baby the right to life. Your baby was not asked to be born, you made the selfish choice to conceive†¦show more content†¦In this case, mothers should consider giving a women who cannot conceive, the opportunity to be a mother. The adoptive parents would be appreciative of getting the chance to be parents and giving your child the life that you could not give them. I believe that this would be the better option because your giving the joy of life to others who will appreciate it. Women argue that abortion is not bad because a fetus does not feel pain, but this is wrong because studies have been shown to prove that fetus’s indeed do experience pain. Bernard N. Nathanson, MD, stated that, when an abortion is performed on a twelve week old fetus, â€Å"We see (in an ultrasound image) the child’s mouth open in a silent scream†¦This is the silent scream of a child threatened imminently with extinction.† With this evidence we can indeed prove that a fetus does experience pain. Many people misconceive the fact that you do have a real human in your stomach, it can feel pain, a fetus is not invincible. Some women try to argue the fact that rape is a good excuse for an abortion, but I still do not agree. A baby did not ask to come in this world just like you did not ask to be raped. Rape is a horrible thing, but I think if you were to get pregnant from rape you should try to make the best of it. That sounds weird, but I believe that in all bad situations there is a blessing. The baby might turn out to be the best thing that ever came into your life. Every baby has aShow MoreRelatedShould Abortion Be Legal?1452 Words   |  6 PagesTravis Lignell Argumentative Essay 04/28/2015 With forty five million abortions per year worldwide, the abortion debate is full of what people consider being right or wrong, or whether deliberately terminating a pregnancy before the birth of the child is in essence, murder. (6) Abortion is an extremely painful topic for both men and women who have put themselves in the situation of whether or not to end a pregnancy. 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