Friday, November 29, 2019

Question What Is Religion free essay sample

Each person’s definition of religion is different. Each person’s faith is different. This is a question that has been asked for centuries, and regardless of the answer given there is no right or wrong answer. However, according to Emile Durkheim in ;Kenneth D. Allan (2 November 2005). Explorations in Classical Sociological Theory: Seeing the Social World. Pine Forge Press. p. 115. religion is a unified system of beliefs and practices relative to sacred things, that is to say, things set apart and forbidden beliefs and practices which unite into one single moral community called a Church all those who adhere to them. Religion is generally born out of culture where members of the culture create a system of beliefs and values. They also establish symbols that represent the belief structure and hold special meaning for believers. There are five major religions of the world these are: Christianity, Judaism, Islam, Hinduism and Buddhism. We will write a custom essay sample on Question What Is Religion? or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Religions can be divided geographically. The content of this essay will focus on Judaism and Islam. This section will begin by the writer giving a brief overview of both religions. Judaism is a one of the oldest religions known to people. Judaism was born about 4000 years ago. Many famous people have been Jewish such as Moses, Jesus, Mahler, Marx, Freud, and Einstein. The history of Jewish people hasn’t been that easy. From the slavery in Egypt to the Holocaust in Europe, the Jewish people have lived a life filled with prejudice. It began with Abraham, the first Jewish person. It is Jewish belief that he made a covenant with God and was promised that he would be the father of a great nation. That nation became the Jewish people. Abraham and his sons and grandsons were called the â€Å"patriarchs†. They were Isaac, his son, and Jacob, his grandson. Jacob’s favorite son Joseph was also an important part of the early history. It was because of Jacob’s sons and their wrong doings that Joseph ended up in Egypt, eventually leading many Jewish people into the land of Egypt. Moses was one of the most famous Jewish prophets. He led the Jewish people out of slavery, led them to Mount Sinai and received the Ten Commandments, a set of rules that people even today still follow. After Moses, the Jewish people had different leaders called judges, and then kings such as David and Solomon to guide them in the land called Israel. Jewish people lived in the land of Israel until 586BCE when they were exiled by the Babylonians. It wasn’t until 1948, about 2000 years later, that Jewish people were able to return to that land. History of Judaism: General Observations. Encyclop? dia Britannica. 2004. Encyclop? dia Britannica Premium Service. Islam is a monotheistic religious tradition that developed in the Middle East in the 7th century C. E. Islam, which literally means surrender or submission, was founded on the teachings of the Prophet Muhammad as an expression of surrender to the will of Allah, the creator and sustainer of the world. The Quran, the sacred text of Islam, contains the teachings of the Prophet that were revealed to him from Allah. Essential to Islam is the belief that Allah is the one and true God with no partner or equal. Islam has several branches and much variety within those branches. The two divisions within the tradition are the Sunni and Shia, each of which claims different means of maintaining religious authority. One of the unifying characteristics of Islam is the Five Pillars, the fundamental practices of Islam. These five practices include a ritual profession of faith, ritual prayer, the zakat (charity), fasting, and the hajj (a pilgrimage to Mecca). Many Muslims are characterized by their commitment to praying to Allah five times a day. One of the defining characteristics of Islam is the primacy of sacred places including Mecca, Medina, and Jerusalem. Muslims gather at mosques to worship Allah, pray, and study scripture. There is not a sharp distinction between the religious and secular aspects of life in Islam; all aspects of a Muslims life are to be oriented to serving Allah. Islam expanded almost immediately beyond its birthplace in the Arabian peninsula, and now has significant influence in Africa, throughout Asia, Europe, and the Americas. The Oxford Handbook of Global Religions (2006) and the Religious Movements Page at the University of Virginia. The writer will also state five similairites about each religion and five differences. one common thing to both is that there is originator of each religion. The people of each religion endured hardships in their beginnings. Each religion had a major prophet, Judaism had Moses and Islam had Muhammad. The prophets of each religion received their book from God. They are also all monotheistic religions meaning both religions believe there is only one God. Both Jews and Muslims deny that Jesus is Divine or the son of God. Both believe that at least at one point in history Israel was the chosen nation by God. They also believe in angels and demons. They also believe that salvation can be given through correct belief and good deeds. The only ritual that these two religions have in common is prayer. The differences existing between both religions are relevant and one should be aware so as to be tolerant of each. In this paragraph this writers main objective is to highlight the differences between the Muslims and the Jews. The holy book of Judaism is called the Torah. The holy book of Islam is called the Quran. Muslims believe that there are some more prophets such as Jesus and Muhammad, whereas Jews reject both. Muslims believe that Muhammad is the Seal of all prophets. Jew do not accept that. The Muslim diet is much less restricted than the Jewish diet. Muslims believe that God had abandoned the nation of Israel as a result of their sins. Jews believe that their covenant with God can never be broken. Having compared both religions the objective of the writer is further expand on of each. The common ritual in both religion is prayer and so it will be explained. â€Å"New step In Religious Education† by Micheal Keene pages 64-65, 1997. Published by Stanley Thornes. States Prayer is the most important part of Muslims worship. There are two kinds of prayer in Islam. The salah is the most vital. The salah is a sequence of prayers done with both action and words. The sequence is called the rak’ah. It is compulsory that two rak’ah are done during the morning prayers, four at noon, three at sunset and four at night. This is preferably done in a mosque or in any clean place. During rak’ah worshippers stand, bows , kneels and touches the ground with his forehead. During Friday prayers in the mosque the imam leads all the worshipers through the sequence. Prayers are said in Arabic . While they pray the entire congregation turns towards the mihrab, so they are facing the holy city of Makkah. Worshippers can say his/ her own private prayers at the end of the set of prayers. These prayer du’a , are said in worshippers own language. These are ‘prayers of the heart’ and end with the person wiping their hands across the face to show they have received God’s blessing. The most important paryers are the ones which Muslims join with others. Muslims are expected to pray all the time. All that is required is a clean place, as this cannot be guaranteed, however the strict Muslim will use a prayer mat, called the Musulla. The mat is use facing Mekkah, which is located using a compass. In every religion prayer is an important element recitation of prayers is the central characteristic of Jewish worship. A Jewish law was passed which states that prayer should be done three times aily: in the morning, in the afternoon and at nightfall. These prayers are called morning prayer (shacharit), afternoon prayer (minchah) and evening prayer (arvith or maariv ). At the heart of each service is the Amidah or Shemoneh Esrei. Another key prayer in many services is the declaration of faith, the Shema Yisrael (or Shem a). The Shema is the recitation of a verse from the Torah (Deuteronomy 6:4): Shema Yisrael Adonai Eloheinu Adonai Echad—Hear, O Israel! The Lord is our God! The Lord is One! Most of the prayers in a traditional Jewish service can be recited in solitary prayer, although communal prayer is preferred. Communal prayer requires a quorum of ten adult Jews, called a minyan. In nearly all Orthodox and a few Conservative circles, only male Jews are counted toward a minyan; most Conservative Jews and members of other Jewish denominations count female Jews as well. In addition to prayer services, observant traditional Jews recite prayers and benedictions throughout the day when performing various acts. Prayers are recited upon waking up in the morning, before eating or drinking different foods, after eating a meal, and so on. The approach to prayer varies among the Jewish denominations. Differences can include the texts of prayers, the frequency of prayer, the number of prayers recited at various religious events, the use of musical instruments and choral music, and whether prayers are recited in the traditional liturgical languages or the vernacular. In general, Orthodox and Conservative congregations adhere most closely to tradition, and Reform and Reconstructionist synagogues are more likely to incorporate translations and contemporary writings in their services. Also, in most Conservative synagogues, and all Reform and Reconstructionist congregations, women participate in prayer services on an equal basis with men, including roles traditionally filled only by men, such as reading from the Torah. In addition, many Reform temples use musical accompaniment such as organs and mixed choirs. Micheal Keene pages 62-63, (1997). The New Steps in Religious Education ( 2nd Edition). Stanley Thornes. Publishers. Name: Kedesha Pennicook Date: September 27,2012 Question What is religion? There are similarities and differences among the religions of the world. List five similarities and five differences and explain one of each (similiarities amp; differences). Introduction Barns amp; Noble (Cambridge) Encyclopedia (1990), States that the English word religion is derived from the Middle English religioun which came from the Old French religion. It may have been originally derived from the Latin word religo which means good faith, ritual, and other similar meanings. Or it may have come from the Latin religare which means to tie fast. In our society religion means believing in a higher power. This higher power is usually a God and people are taught how this God came to be. When one believes in a God there are set ways of worship and a moral code that is lived by. Not every religion has a God and sometimes there are many God’s or in some instances there is no God. In any case this general definition does not do justice to all the religions because of the different beliefs that each religion has. This paper will provide a definition for religion, tell five simialrities and differences that exist between Judaism and Islam and slow will explain one of each. What is religion? Each person’s definition of religion is different. Each person’s faith is different. This is a question that has been asked for centuries, and regardless of the answer given there is no right or wrong answer. However, according to Emile Durkheim in ;Kenneth D. Allan (2 November 2005). Explorations in Classical Sociological Theory: Seeing the Social World. Pine Forge Press. p. 115. religion is a unified system of beliefs and practices relative to sacred things, that is to say, things set apart and forbidden beliefs and practices which unite into one single moral community called a Church all those who adhere to them. Religion is generally born out of culture where members of the culture create a system f beliefs and values. They also establish symbols that represent the belief structure and hold special meaning for believers. There are five major religions of the world these are: Christianity, Judaism, Islam, Hinduism and Buddhism. Religions can be divided geographically. The content of this essay will focus on Judaism and Islam. This section will begin by the writer giving a brief overview of both religions. Judaism is a one of the oldest religions known to people. Judaism was born about 4000 years ago. Many famous people have been Jewish such as Moses, Jesus, Mahler, Marx, Freud, and Einstein. The history of Jewish people hasn’t been that easy. From the slavery in Egypt to the Holocaust in Europe, the Jewish people have lived a life filled with prejudice. It began with Abraham, the first Jewish person. It is Jewish belief that he made a covenant with God and was promised that he would be the father of a great nation. That nation became the Jewish people. Abraham and his sons and grandsons were called the â€Å"patriarchs†. They were Isaac, his son, and Jacob, his grandson. Jacob’s favorite son Joseph was also an important part of the early history. It was because of Jacob’s sons and their wrong doings that Joseph ended up in Egypt, eventually leading many Jewish people into the land of Egypt. Moses was one of the most famous Jewish prophets. He led the Jewish people out of slavery, led them to Mount Sinai and received the Ten Commandments, a set of rules that people even today still follow. After Moses, the Jewish people had different leaders called judges, and then kings such as David and Solomon to guide them in the land called Israel. Jewish people lived in the land of Israel until 586BCE when they were exiled by the Babylonians. It wasn’t until 1948, about 2000 years later, that Jewish people were able to return to that land. History of Judaism: General Observations. Encyclop? dia Britannica. 2004. Encyclop? dia Britannica Premium Service. Islam is a monotheistic religious tradition that developed in the Middle East in the 7th century C. E. Islam, which literally means surrender or submission, was founded on the teachings of the Prophet Muhammad as an expression of surrender to the will of Allah, the creator and sustainer of the world. The Quran, the sacred text of Islam, contains the teachings of the Prophet that were revealed to him from Allah. Essential to Islam is the belief that Allah is the one and true God with no partner or equal. Islam has several branches and much variety within those branches. The two divisions within the tradition are the Sunni and Shia, each of which claims different means of maintaining religious authority. One of the unifying characteristics of Islam is the Five Pillars, the fundamental practices of Islam. These five practices include a ritual profession of faith, ritual prayer, the zakat (charity), fasting, and the hajj (a pilgrimage to Mecca). Many Muslims are characterized by their commitment to praying to Allah five times a day. One of the defining characteristics of Islam is the primacy of sacred places including Mecca, Medina, and Jerusalem. Muslims gather at mosques to worship Allah, pray, and study scripture. There is not a sharp distinction between the religious and secular aspects of life in Islam; all aspects of a Muslims life are to be oriented to serving Allah. Islam expanded almost immediately beyond its birthplace in the Arabian peninsula, and now has significant influence in Africa, throughout Asia, Europe, and the Americas. The Oxford Handbook of Global Religions (2006) and the Religious Movements Page at the University of Virginia. The writer will also state five similairites about each religion and five differences. one common thing to both is that there is originator of each religion. The people of each religion endured hardships in their beginnings. Each religion had a major prophet, Judaism had Moses and Islam had Muhammad. The prophets of each religion received their book from God. They are also all monotheistic religions meaning both religions believe there is only one God. Both Jews and Muslims deny that Jesus is Divine or the son of God. Both believe that at least at one point in history Israel was the chosen nation by God. They also believe in angels and demons. They also believe that salvation can be given through correct belief and good deeds. The only ritual that these two religions have in common is prayer. The differences existing between both religions are relevant and one should be aware so as to be tolerant of each. In this paragraph this writers main objective is to highlight the differences between the Muslims and the Jews. The holy book of Judaism is called the Torah. The holy book of Islam is called the Quran. Muslims believe that there are some more prophets such as Jesus and Muhammad, whereas Jews reject both. Muslims believe that Muhammad is the Seal of all prophets. Jew do not accept that. The Muslim diet is much less restricted than the Jewish diet. Muslims believe that God had abandoned the nation of Israel as a result of their sins. Jews believe that their covenant with God can never be broken. Having compared both religions the objective of the writer is further expand on of each. The common ritual in both religion is prayer and so it will be explained. â€Å"New step In Religious Education† by Micheal Keene pages 64-65, 1997. Published by Stanley Thornes. States Prayer is the most important part of Muslims worship. There are two kinds of prayer in Islam. The salah is the most vital. The salah is a sequence of prayers done with both action and words. The sequence is called the rak’ah. It is compulsory that two rak’ah are done during the morning prayers, four at noon, three at sunset and four at night. This is preferably done in a mosque or in any clean place. During rak’ah worshippers stand, bows , kneels and touches the ground with his forehead. During Friday prayers in the mosque the imam leads all the worshipers through the sequence. Prayers are said in Arabic . While they pray the entire congregation turns towards the mihrab, so they are facing the holy city of Makkah. Worshippers can say his/ her own private prayers at the end of the set of prayers. These prayer du’a , are said in worshippers own language. These are ‘prayers of the heart’ and end with the person wiping their hands across the face to show they have received God’s blessing. The most important paryers are the ones which Muslims join with others. Muslims are expected to pray all the time. All that is required is a clean place, as this cannot be guaranteed, however the strict Muslim will use a prayer mat, called the Musulla. The mat is use facing Mekkah, which is located using a compass. In every religion prayer is an important element recitation of prayers is the central characteristic of Jewish worship. A Jewish law was passed which states that prayer should be done three times daily: in the morning, in the afternoon and at nightfall. These prayers are called morning prayer (shacharit), afternoon prayer (minchah) and evening prayer (arvith or maariv ). At the heart of each service is the Amidah or Shemoneh Esrei. Another key prayer in many services is the declaration of faith, the Shema Yisrael (or Shema). The Shema is the recitation of a verse from the Torah (Deuteronomy 6:4): Shema Yisrael Adonai Eloheinu Adonai Echad—Hear, O Israel! The Lord is our God! The Lord is One! Most of the prayers in a traditional Jewish service can be recited in solitary prayer, although communal prayer is preferred. Communal prayer requires a quorum of ten adult Jews, called a minyan. In nearly all Orthodox and a few Conservative circles, only male Jews are counted toward a minyan; most Conservative Jews and members of other Jewish denominations count female Jews as well. In addition to prayer services, observant traditional Jews recite prayers and benedictions throughout the day when performing various acts. Prayers are recited upon waking up in the morning, before eating or drinking different foods, after eating a meal, and so on. The approach to prayer varies among the Jewish denominations. Differences can include the texts of prayers, the frequency of prayer, the number of prayers recited at various religious events, the use of musical instruments and choral music, and whether prayers are recited in the traditional liturgical languages or the vernacular. In general, Orthodox and Conservative congregations adhere most closely to tradition, and Reform and Reconstructionist synagogues are more likely to incorporate translations and contemporary writings in their services. Also, in most Conservative synagogues, and all Reform and Reconstructionist congregations, women participate in prayer services on an equal basis with men, including roles traditionally filled only by men, such as reading from the Torah. In addition, many Reform temples use musical accompaniment such as organs and mixed choirs. Micheal Keene pages 62-63, (1997).

Monday, November 25, 2019

Theory of evolution Essays (414 words) - Anthropology, Free Essays

Theory of evolution Essays (414 words) - Anthropology, Free Essays Theory of evolution Shance McGuffey PHL/458 July 16, 2015 Albert Vandiver Theory of evolution If the theory of evolution is true, as scientific evidence overwhelmingly suggests, a human being is nothing more than an ape. Back as far as I could remember our schooling always suggested that we as humans had evolved from apes by using the Darwin theory. That's not quite how it works though. Apes didn't turn in to humans over the evolutionary time. Now there was a common ancestor prior to the humans and apes of today that birth to what we are today. Through differing mutations and population sequestering, the ancestor of humans and the ancestors of apes evolved through a whole different line over millions of years. Because of that ancestor that is the reason in some ape species having what we call human traits. According to scientists it is very unlikely that current apes will ever evolve into homo-sapiens through the next million years of evolution. There could be some other advanced version born from their own genetics in the distant future. (Mauk, 2013) So the conclusion is that we are not apes, in fact we have no recent evolutionary relation to today's apes. Because apes might stand on two feet and have certain family values that closely relate to humans they are as far away from us as any other mammal on this planet. Even though Darwin's theory has been used for many years scientist are having to make change to his theory because of the advances in science today. We are smarter and more mentally equipped to figure out the process of evolution today. More so than Darwin did back in the nineteenth century. Evolution by natural selection is one of the best substantiated theories in the history of science. This is supported by factual evidence from a variety of scientific disciplines, including paleontology, geology, genetics and developmental biology. The American Museum of Natural History in New York City. "All life on Earth is connected and related to each other," and this diversity of life is a product of "modifications of populations by natural selection, where some traits were favored in and environment over others". (Richmond, 2013 p3) References Mauk, B. (2013, February 14). Why Haven't All Primates Evolved into Humans? Retrieved from Live Science: livescience.com/32503-why-havent-all-primates-evolved-into-humans.html Richmond, B. (2013, May 13). What is Darwins theory of evolution? Retrieved from Live Science: livescience.com/474-controversy-evolution-works.html

Thursday, November 21, 2019

Contemporary Issues Assignment 2 Essay Example | Topics and Well Written Essays - 2000 words

Contemporary Issues Assignment 2 - Essay Example This demographic appears as being unique because of societal stereotypes that with age comes ignorance as far as technology is concerned. Thus, the elderly are not expected by mainstream society to be frequent Internet users and vocal on sites such as social media platforms. This stereotyping has led to the loss of business opportunities by many corporates all over the globe (Aaker, 000, p.81). This can be extrapolated from the fact that silver surfers represent a market and workforce base that is more often than not unexploited almost in its entirety (Aras, 2009, p.55). Silver-Surfer demographic is relevant to any contemporary commercial organization primarily because of the timeline of operations of people in this group. A majority of people in this age demographic have retired from formal employment or are en route to do so in a few years. As a result, people in this age group do not have restrictions that are present in other age groups, the most common of which is time (Bratton, Jeffrey, 2000, p.201). People in this age group work on a more flexible timetable as opposed to their age groups where people are working multiple jobs at the same time (Bonhoeffer, 2001, p.91). This demographic group is therefore very significant in any contemporary commercial organization because of the flexibility of this group as far as time is concerned. Silver surfers present an operations base that is primarily unexploited. Society tends to shy away from the old in any formal setting. These emotions and reactions are fuelled by stereotypes that people in this age demographic are very dull as far as their social interaction is concerned (Schneider, 2004, p.50). The result is a very capable and highly experienced workforce that is greatly unexploited. Any contemporary commercial organization considering hiring silver surfers can use this as a public relations strategy to rid the world of societal

Wednesday, November 20, 2019

Pharmacy Admission Letter Essay Example | Topics and Well Written Essays - 500 words

Pharmacy Admission Letter - Essay Example Once in a while I have participated in volunteer work to help the sick and the poor due to the call I have to care for the needy. At one time, I accompanied my parent in China and I volunteered to help the poor and the sick. I have been serious with my studies throughout my academic life after I scored a bad grade once when I enjoyed my freedom immediately I went to college. Since then, my academic track has been smooth and I have always maintained good grades in my area of study. I really like the program run LECOM Erie School of Pharmacy since it is possible to complete a Doctorate degree within three years instead of four years. The institution runs all year round curriculum hence they are able to complete their curriculum within three years. This is very encouraging especially to me since I am a sharp student and for this case, one spends less time in college. Having studied Psychology major and biology minor Case Western Reserve University, I have sound background in what is required for one to study a Doctorate of Pharmacy Degree. Since I have good background in the pharmacy area coupled with me being a fast learner, I believe the Doctorate of Pharmacy Degree fits my area of specialization.

Monday, November 18, 2019

Does malcom x deserve the honor of being on a U.S. stamp Essay

Does malcom x deserve the honor of being on a U.S. stamp - Essay Example He later died of an assassination on February 21 1965 (Draper 48). The USPS has strategies that recognize distinguished contributors in the history of the U.S. This is courtesy of the USPS Black Heritage Series that recognizes overlooked historic contributors in America. Among the leaders recognized in the strategy, include Martin Luther King, Jr., Scott Joplin, Sojourner Truth and other leaders in the country’s history. The USPS, through a committee, nominates leaders and historic contributors from a diversity of fields. Such fields include entrepreneurs, scientists, political and social activists. On 20 January 1999, the USPS announced and made celebration for featuring Malcolm X as among the list of notable contributors in the history of the country. That was courtesy of the 33-cent stamp, which bears the photograph of Malcolm X. The USPS featured a photograph of Malcolm X on a 33-cent stamp as a form of honor attributed to his contribution to the history of the country. This was part of the black heritage remembrance series. The decision by USPS triggered the debate on whether he held credit for the recognition (Cooks 161). Malcolm X did not deserve the honor of being on a U.S stamp. The honor by USPS has its basis on appreciation of the nominees in making the history of the country. Malcolm X does not fit the description of one among the great contributors of the history of the country. He was a renowned advocate of Black Nationalism. He was notably in opposition with the nonviolent policies and multiracial approach to having the challenges the blacks faced end, his contribution remains immense. This formed a major reason for their differences with Martin Luther Jr. The two leaders never shared common ways of advocating for the rights of the people. The contribution of Malcolm X in coming up with various acts advocating for the rights of the blacks remains promoted violence. His participation in the 1964 debate over the Civil Rights Act remains a

Saturday, November 16, 2019

Effect of Short Range Correlation

Effect of Short Range Correlation The effect of short range correlation on the nuclear charge density distribution, elastic and inelastic electron scattering coulomb form factors of 16O nucleus Abdullah S. Mdekil Abstract The effect of the short range correlation on the charge density disribution, elastic electron scattering form factors and inelastic Coulomb form factors is studied for the two excited states (6.92 and 11.52 MeV) in is analyzed. This effect (which depends on the correlation parameter) is inserted into the ground state charge density distribution through the Jastrow type correlation function. The single particle harmonic oscillator wave function is used with an oscillator size parameter The parameters and are considered as free parameters, adjusted for each excited state separately so as to reproduce the experimental root mean square charge radius of In inelastic coulomb (longitidinal) form factors of 16O, two different models are employed for . In the first model (model A), is considered as a closed shell nucleus. Here, the model space in does not contribute to the transition charge density, because there are no protons outside the closed shell nucleus . In the second model (mo del B), the nucleus of is assumed as a core of with 2 protons and 2 neutrons move in and model space. It is found that the introduction of the effect of short range correlations is necessary for obtaining a remarkable modification in the calculated inelastic Coulomb form factors and considered as an essential for explanation the data amazingly throughout the whole range of considered momentum transfer. Keywords: charge density distribution, elastic charge form factors, inelastic longitudinal form factors, short range correlation. 1-Introduction Electron scattering provides more accurate information about the nuclear structure for example size and charge distribution. It provides important knowledge about the electromagnetic currents inside the nuclei. Electron scattering have been provided a good test for such evaluation since it is sensitive to the spatial dependence on the charge and current densities [1, 2, 3]. Depending on the electron scattering, one can distinguish two types of scattering: in the first type, the nucleus is left in its ground state, that is called elastic electron scattering while in the second type, the nucleus is left on its different excited states, this is called inelastic electron scattering [4, 5]. In the studies of Massen et al. [6-8], the factor cluster expansion of Clark and co-workers [9-11] was utilized to derive an explicit form of the elastic charge form factor, truncated at the two-body term. This form, which is a sum of one- and two-body terms, depends on the harmonic oscillator parameter and the correlation parameter through a Jastrow-type correlation function [12]. This form is employed for the evaluation of the elastic charge form factors of closed shell nuclei and in an approximate technique (that is, for the expansion of the two-body terms in powers of the correlation parameter, only the leading terms had been kept) for the open and shell nuclei. Subsequently, Massen and Moustakidis [13] performed a systematic study of the effect of the SRC on and shell nuclei with entirely avoiding the approximation made in their earlier works outlined in [6-8] for the open shell nuclei. Explicit forms of elastic charge form factors and densities were found utilizing the fac tor cluster expansion of Clark and co-workers and Jastrow correlation functions which introduce the SRC. These forms depends on the single particle wave functions and not on the wave functions of the relative motion of two nucleons as was the case of our previous works [14-20] and other works [6,21,22]. It is important to point out that all the above studies were concerned with the analysis of the effect of the SRC on the elastic electron scattering charge form factors of nuclei. There has been no detailed investigation for the effect of the SRC on the inelastic electron scattering form factors of nuclei. We thus, in the present work, perform calculations with inclusion this effect on the inelastic Coulomb form factors for closed shell nucleus. As a test case, the is considered in this study. To study the effect of SRC (which depends on the correlation parameter on the inelastic electron scattering charge form factors of considered nucleus, we insert this effect on the ground state charge density distribution through the Jastrow type correlation function [12]. The single particle harmonic oscillator wave function is used in the present calculations with an oscillator size parameter The effect of SRC on the inelastic Coloumb form factors for the two excited states (6.92 and 11.52 MeV) in is analyzed. 2. Theory Inelastic electron scattering longitudinal (Coulomb) form factor involves angular momentum and momentum transfer and is given by [23] (1) where and are the initial and final nuclear states (described by the shell model states of spin and isospin ), is the longitudinal electron scattering operator, is the center of mass correction (which removes the spurious states arising from the motion of the center of mass when shell model wave function is used), is the nucleon finite size correction and assumed to be the same for protons and neutrons, A is the nuclear mass number, is the atomic number and is the harmonic oscillator size parameter. The form factor of eq.(1) is expressed via the matrix elements reduced in both angular momentum and isospin [24] (2) where in eq. (2), the bracket ( ) is the three- symbol, where and are restricted by the following selection rule: (3) and is given by The reduced matrix elements in spin and isospin space of the longitudinal operator between the final and initial many particles states of the system including configuration mixing are given in terms of the one-body density matrix (OBDM) elements times the single particle matrix elements of the longitudinal operator [25] (4) where and label single particle states (isospin included) for the shell model space. The in eq. (4) is calculated in terms of the isospin-reduced matrix elements as [26] (5) where is the isospin operator of the single particle. (6) The model space matrix element, in eq. (6), is given by (7) where is the spherical Bessel function and is the model space transition charge density, expressed as the sum of the product of the times the single particle matrix elements, given by [26]. (8) Here, is the radial part of the harmonic oscillator wave function and is the spherical harmonic wave function. The core-polarization matrix element, in eq. (6), is given by (9) where is the core-polarization transition charge density which depends on the model used for core polarization. To take the core-polarization effects into consideration, the model space transition charge density is added to the core-polarization transition charge density that describes the collective modes of nuclei. The total transition charge density becomes (10) According to the collective modes of nuclei, the core polarization transition charge density is assumed to have the form of Tassie shape [27] (11) where is the proportionality constant given by [14] (12) which can be determind by adusting the reduced transition probability to the experimental value, and is the ground state charge density distribution of considered nuclei. For the ground state charge densities of closed shell nuclei may be related to the ground state point nucleon densities by [28, 29] (13) in unit of electronic charge per unit volume (e.fm-3). An expression of the correlated density (where the effect of the SRCs is included), consists of one- and two-body terms, is given by [13] (14) where is the normalization factor and is the one body density operator given by (15) The correlated density of eq. (14), which is truncated at the two-body term and originated by the factor cluster expansion of Clark and co-workers [10-12], depends on the correlation parameter through the Jastrow-type correlation (16) where is a state-independent correlation function, which has the following properties: for large values of and for It is so clear that the effect of SRCs, inserted by the function becomes large for small values of SRC parameter and vice versa. The one-body term, in eq. (14), is well known and given by (17) where is the occupation probability of the state and is the radial part of the single particle harmonic oscillator wave function. The two-body term, in eq. (14), is given by [13] (18) where (19) The form of the two-body term is then originated by expanding the factor in the spherical harmonics and expressed as [13] (20) where (21) and is the Clebsch-Gordan coefficients. It is important to point out that the expressions of eqs. (17) And (20) are originated for closed shell nuclei with where the occupation probability is 0 or 1. To extend the calculations for isotopes of closed shell nuclei, the correlated charge densities of these isotopes are characterized by the same expressions of eqs. (17) and (20) (this is because all isotopic chain nuclei have the same atomic number but this time different values for the parameters and are utilized. The mean square charge radii of nuclei are defined by (22) where the normalzation of the charge density distribution is given by (23) 3-Results and discussion The ground state CDD is calculated by eq.(13) together with eqs. (14), (17) and (20). The calculated CDD without (with) the effect of the SRC [i.e., when the correlation parameter is obtained by adjusting only the parameter (the two parameters and ) so as to reproduce the experimental root mean square (rms) charge radii of nuclei under study. The elastic electron scattering charge form factors which is simply the Fourier transform of the ground state CDD. In Fig. 1, we compare the calculated CDD [Fig. 1(a)] and elastic charge form factors [Fig. 1(b)] of with those of experimental data (the open circles). In Fig. 1, we compare the calculated CDD [Fig. 1 (a)] and elastic charge form factors [Fig. 1 (b)] of with those of experimental data (the open circles). The dashed curves are the calculated results without the inclusion of the effect of the SRC obtained with and fm. The solid curves are the calculated results with including the effect of the SRC obtained with fm-2 and fm. It is important to point out that the parameters and employed in the calculations of the dashed and solid curves are chosen so as to reproduce the experimental rms charge radius of Fig. 1 (a) illustrates that the calculated CDD of the dashed curve (without the effect of the SRC) is in such a good agreement with that of the experimental data, and the solid curve (with the effect of the SRC) is not in such a good agreement with that of the experimental data, e specially in the central region ( fm) of the distributions. The inclusion of SRC has the feature of reducing the central region of the distribution as seen in the solid curve of this figure. Inspection to the Fig. 1 (b) gives an indication that the solid curve is better describing the experimental data than that of the dashed curve, particularly in the region of momentum transfer fm-1. The rms charge radius calculated with the above values of and is 2.621 fm, which is less than the experimental value by 0.097fm, which corresponds to a decrease of nearly 3.6 % of the experimental value. Fig. 1. The calculated CDD and elastic charge form factors are compared with those of experimental data. The dashed curve corresponds to the values for the parameters and fm, the solid curve corresponds to the values for the parameters fm-2 and fm while the open circles and the triangles in Figs. 1 (a) and 1 (b) are the experimental data taken from [30] and [31], respectively. The effect of the SRC on the inelastic Coulomb form factors is studied for the two excited states (6.92 and 11.52 MeV) in. Core polarization effects are taken into consideration by means of the Tassie model [eq. (11)], where this model depends on the ground state charge density distribution. The proportionality constant [eq. (12)] is estimated by adjusting the reduced transition probability to the experimental value. The effect of the SRC is incorporated into the ground state charge density distribution through the Jastrow type correlation function [12]. The single particle harmonic oscillator wave function is employed with an oscillator size parameter The charge density distribution calculated without the effect of the SRC depends only on one free parameter (namely the parameter), where is chosen in such away so as to reproduce the experimental rms charge radii of considered nuclei. The charge density distribution calculated with the effect of the SRC depends on two free parameters (namely the harmonic oscillator size parameter and the correlation parameter), where these parameters are adjusted for each excited state separately so as to reproduce the experimental rms charge radii of considered nuclei. Two different models are employed for. In the first model (model A), is considered as a closed shell nucleus. In this model, the proton occupation probabilities in are assumed to be and Here, the model space in does not contribute to the transition charge density [i.e. ], because there are no protons outside the closed shell nucleus . Accordingly, the Coloumb form factors of come entirely from the core polarization transition charge density. In the second model (model B), the nucleus of is assumed as a core of with 2 protons and 2 neutrons move in and model space. In this model, the proton occupation probabilities in are assumed to be and Here, the total transition charge density [eq. (10)] comes from both the model space and core polarization transition charge densities. The OBDM elements of are generated, via the shell model code OXBASH [32], using the REWIL [33] as a realistic effective interaction in the isospin formalism for 4 particles move in the and model spac e with a core. In Table 1, the experimental excitation energies (MeV), experimental reduced transition probabilities (fm) and the chosen values for the parameters and for each excited state (used in the calculations of model A and B) in and are displayed. The root mean square (rms) charge radius calculated in both models with the effect of SRC is also displayed in this table and compared with that of experimental result. It is evident from this table that the values of the parameter employed for calculations with the effect of SRC are smaller than that of without SRC ( fm) . This is attributed to the fact that the introduction of SRC leads to enlarge the relative distance of the nucleons (i.e., the size of the nucleus) whereas the parameter (which is proportional to the radius of the nucleus) should become smaller so as to reproduce the experimental rms charge radius of the considered nuclei. Inelastic Coloumb form factors for different transitions in are displayed in Figs. 1 and 2. The calculated inelastic form factors obtained with model A are shown in the upper panel [Figs. 1(a)-2(a)] of the above figures whereas those obtained with model B are shown in the lower panel [Figs. 1(b)- 2(b)] of the above figures. It is obvious that all transitions considered in, presented in the above figures, are of an isoscalar character. Besides, the parity of them does not change. Here, the calculated inelastic form factors are plotted versus the momentum transfer and compared with those of experimental data. The dashed and solid curves are the calculated inelastic Coloumb form factors without and with the inclusion of the effect of the SRC, respectively. The open symbols are those of experimental data taken from [34, 35]. Table1. The experimental excitation energies and reduced transition probabilities, the chosen values for and as well as the rms charge radius calculated with the effect of the SRC of 16O. (fm) Model B Model A fm2L) (MeV) State (fm) (fm-2) (fm) (fm) (fm-2) (fm) [30] 2.704

Wednesday, November 13, 2019

Commentary on the Satiric Nature of George Orwell’s 1984 Essay

It goes without saying that every work in literature is unique. The way that certain novels, novellas, or poems go about accentuating certain themes or points, whether of grand nature or of little consequence to society, is certainly achieved through a concoction of literary styles. The most enduring and effective works of literature exhibit an artful combination of literary device and aforementioned technique. Without a doubt, George Orwell’s Nineteen Eighty-Four exhibits such a blend of style through characteristics of a dystopian novel and satire. Orwell lived in a time when the spread of communism, mostly unbeknownst to his audience, posed an unimaginable threat to freedom. Therefore, though his novel, he attempted to emphasize the fallacies that would exist in a totalitarian nation-state if people were to accept its lure of equality. However, many argue about how exactly Orwell goes about achieving this; the line of argument divided between satire and a dystopian fictio n. Yet, it’s impossible to be dogmatic when considering this aspect of literature since, as stated above, any piece of literature, most especially works such as Nineteen Eighty-Four, exhibit a mix of literary elements. Upon close inspection though, it becomes possible to understand Orwell’s Nineteen Eighty-Four as a novel with strong satiric elements. By analyzing the presence of novelistic rudiments, such as dystopian plot, characterization, theme, and symbolism, compared to satiric essentials of humor, irony, and subtle criticism, it becomes evident that the effectiveness of Nineteen Eighty-Four derives from the fact that it adheres strongly as a novel with strong satiric elements compared to satire with novelistic elements. It’s important to emphasis tha... ...symbolism employs, it becomes possible to understand Nineteen Eighty-Four as a novel with strong satiric elements. There are different degrees of satire, and this particular work of Orwell the satire, perhaps compared to more blatant criticisms of political theories such as his Animal Farm, is much more subtle. The criticism is less obvious compared to the more foreboding warning presented through the implementation of novelistic elements. Still, some may argue that the exaggerated nature of the work is itself satiric, but one can’t necessarily draw a distinction between that and warning. Thus lies the murkiness that makes works such as Nineteen Eighty-Four effective. Prevalent novelistic elements combined with subtle jabs of satire, in the form of dark humor, criticism, and irony; make this particular work everlasting and truly applicable to any temporal period.

Monday, November 11, 2019

Management and Quality Control

Chatammour Henderson Marketing Management Seminar 640 February 25, 2012 Asterand Memorandum: â€Å"What is the ultimate goal of Asterand’s quality control initiative? † Asterand clearly did not have an effective quality control system in process prior to accepting its contract with Amgen to supply human tissue samples.Although Asterand is a new supplier to the biopharmaceutical and pharmaceutical industry, it will need to immediately establish quality control methods that will allow them to process orders correctly and deliver the final product to the standards and requirements of the procuring company. This will demonstrate Asterand’s ability to provide consistent and reliable human-tissue samples that meet the rigorous regulatory standards that the FDA places on all biotechnology and pharmaceutical products.As indicated in the case study, Asterand failed to meet Amgen’s quality standards on four occasions with different reasons. Asterand’s quality control challenges did not begin with Amgen. Asterand also faced challenges with implementing standardized protocols for storage and data collection across laboratories and hospitals, organizing and storing samples over long periods, and meeting the stringent regulatory requirements for clinical testing.It is imperative that Asterand addresses these challenges in order to stay in business and to expand the company. Human-tissue sampling is a new and innovative process that can be rejected by its target consumers if it does not have good quality control methods. Asterand’s ultimate goal of the quality control initiative is to be well received in the niche human-tissue sample market so that the company can increase sales growth, secure financing, attract investors and ultimately expand its operations.

Friday, November 8, 2019

The Cuban Trade Embargo essays

The Cuban Trade Embargo essays In the summer of 1960, the United States set in motion a process that has gradually grown stronger ever since. This process was the Cuban Trade Embargo. The process began when the Cuban government ordered two U.S. oil companies, Standard and Texaco, to refine Soviet crude oil at their Cuban refineries. The two companies refused, and to no one's surprise, the Cuban response, on July 1 of that year, was to nationalize both the companies' holdings in Cuba. This, though, was only one of the three main factors that led to the Cuban Trade Embargo. The second reason was to raise the costs to the Soviets, and to the Cubans, of maintaining their alliance and pursuing policies detrimental to U.S. interests. Third, to reduce the resources Cuba could pour into assistance to revolutionary movements, especially in Latin America. At the time, all of these objectives were considered completely rational. They were, after all, formulated against the backdrop of the Cold War and Castro's vows to spark revolution throughout the southern hemisphere. But this was 1960, a time of crisis and uncertainty among the nation. In today's world, revolution amidst a country is almost unheard of, the Soviet Union has fallen, and we remain one of only a handful of countries that continue to hold a trade embargo against Cuba. The United States must call a halt to the Cuban Trade Embargo. On Wednesday, November 28, 2001, the United Nations held a vote on whether they were for or against the United States concerning the trade embargo with the island of Cuba. For the tenth consecutive year, the United Nations voted 167 to 3, against the embargo. Only the United States, Israel, and the Marshall Islands voted for the embargo. Despite the overwhelming majority, the United States refuses to end the embargo. Instead, it continues to add sanctions and remove them, all depending on the president at that time. The last sanction that the United States forced upon the Cuba...

The Cuban Trade Embargo essays

The Cuban Trade Embargo essays In the summer of 1960, the United States set in motion a process that has gradually grown stronger ever since. This process was the Cuban Trade Embargo. The process began when the Cuban government ordered two U.S. oil companies, Standard and Texaco, to refine Soviet crude oil at their Cuban refineries. The two companies refused, and to no one's surprise, the Cuban response, on July 1 of that year, was to nationalize both the companies' holdings in Cuba. This, though, was only one of the three main factors that led to the Cuban Trade Embargo. The second reason was to raise the costs to the Soviets, and to the Cubans, of maintaining their alliance and pursuing policies detrimental to U.S. interests. Third, to reduce the resources Cuba could pour into assistance to revolutionary movements, especially in Latin America. At the time, all of these objectives were considered completely rational. They were, after all, formulated against the backdrop of the Cold War and Castro's vows to spark revolution throughout the southern hemisphere. But this was 1960, a time of crisis and uncertainty among the nation. In today's world, revolution amidst a country is almost unheard of, the Soviet Union has fallen, and we remain one of only a handful of countries that continue to hold a trade embargo against Cuba. The United States must call a halt to the Cuban Trade Embargo. On Wednesday, November 28, 2001, the United Nations held a vote on whether they were for or against the United States concerning the trade embargo with the island of Cuba. For the tenth consecutive year, the United Nations voted 167 to 3, against the embargo. Only the United States, Israel, and the Marshall Islands voted for the embargo. Despite the overwhelming majority, the United States refuses to end the embargo. Instead, it continues to add sanctions and remove them, all depending on the president at that time. The last sanction that the United States forced upon the Cuba...

Wednesday, November 6, 2019

Leaders and Managers

Leaders and Managers Management comes with the responsibilities of conducting change while a leadership is characterized by the ability to inspire and direct people towards achieving specific goals. Ambler (2008) compares leadership and management on various aspects. According to Ambler (2008), a manager is an administrator while a leader is an innovative individual.Advertising We will write a custom essay sample on Leaders and Managers specifically for you for only $16.05 $11/page Learn More Thus, a leader has innovative skills integrated with original ideas upon which creativity is developed. In addition to that, Ambler (2008) describes a leader as one dependent upon and as a trustworthy person who focuses on the people who are led. In contrast, a manager act as a copy that relies on direction and procedures embedded in an organization’s structure. Organizations are led by executives who combine both leadership and managerial principles. Managers base their decisions on realities with short term perspectives (Ambler 2008). In addition to leaders embracing long term goals, objectives and vision, they take a keener perspective of wanting to know what could be the likely cause of a situation and why a particular outcome should be attributed to a specific issue. To the contrary Ambler (2008) notes that a manager takes the perspective of knowing how a situation arises and when such an event could occur. While managers critically look at the basics of an issue and how an issue develops, a leader is interested on the general outcome of an event. A manager’s decisions are based on previous knowledge and experience while a leader innovatively comes up with original ideas and approaches to solving a problem. Ambler (2008) asserts that a Manager is authoritative while a leader may question authority. Leaders have personal characteristics such as relying on self in decision making and influencing actions by the people under authority, while a manager o bediently stays submissive to authority (Ambler 2008). Ambler (2008) differentiates a manager and a leader by their approaches to the way they handle issues. â€Å"The manager does things right; the leader does the right thing† (Ambler 2008). Managing and Leading people in organizations are complex undertakings. According to Ambler (2008) leadership and management skills play a vital role in the way organizations plan their activities with an emphasis on management functions that include planning, organizing, directing, staffing, and controlling.Advertising Looking for essay on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More Ambler (2008) agrees that both elements of management and leadership provide a clear way forward for problem solving in organizations. In addition to that, strategic management decisions that are made and aligned with an organization’s vision entail a complimentary approach to decision making (Ambler 2008). Management is seen as a way to deal with complex organizational issues (Ambler 2008). Executives with good managerial skills are able to maintain law and order in organizational functions in addition to consistently running organizational activities. Ambler (2008) argues further that organizations can only cope with challenges they face if management and leadership qualities are integrated and reflect both strong leadership and management. Ambler (2008) affirms that leadership and management are important components which should be balanced in running an organization. In addition to that, an organization can not operate well if leadership and management qualities are not integrated in a balanced manner. Ambler (2008) continues to argue that a leader brings into effect organizational policies while acting as a pivot in linking organizational activities. A manager on the other hand integrates the running of an organization with its vision and looks for w ays to steer it to achieve its vision through the policies it has formulated. Ambler (2008) affirms that a leader is characterized by the provision of skills and is always looked at as a problem solver, while a manager acts as a source of change. A manager is a risk taker in promoting an organization’s activities while a leader takes an organization through such risks. It is from a leader that others learn from, thus acting as a source of inspiration while a manager may create a good company image but without inherent characteristic that may inspire other individuals. Groups are well organizes and run by team leaders with leadership qualities. Therefore group members look to a team leader as the source of strength and an ideological father. A manager may not necessarily have the inherent qualities to inspire such a fatherly role. Ambler (2008) argues that a leader enjoys the powers and ability to deal with group members who may deviate from the norms of a group in the way of punishing them in addition to a leader being susceptible to the wrath that may arise in a group. A manager issues commands against established standards. These formal standards provide the basis for punishing errant subordinates.Advertising We will write a custom essay sample on Leaders and Managers specifically for you for only $16.05 $11/page Learn More According to Ambler (2008), a leader integrates long term goals in steering an organization while managers may focus on both short term and long term objectives. Ambler (2008) describes leadership as an art and asserts that management is a science. While leadership integrates elements of vision and imaginations, management integrates aspects of logical approaches to issues in addition to creativity and emotion. Further Ambler (2008) identifies leadership with people’s abilities and contends that managers rely heavily on past performance of individuals in specific areas of interest. Ambler (2008) con cludes by asserting that leadership and management work together to achieve organizational goals, where a leader identifies what should be done and a manager brings what to be done into action. References Ambler, G. (2008) The Practice of Leadership. Web.

Monday, November 4, 2019

The Welfare State in the United Kingdom Essay Example | Topics and Well Written Essays - 1000 words

The Welfare State in the United Kingdom - Essay Example The Labour government implemented a comprehensive welfare system in the United Kingdom. This effort was mainly concentrated in the period 1945 to 1951. In the year 1948, the National Health Service or the NHS Act 1946 was enacted. This act was instrumental in introducing a publicly administered health care system in the UK (Weisser & Kishlansky, 2007). Since 1979, the UK government was remarkably reluctant to allocate funds for welfare measures. This resulted in the poor performance of welfare programmes. However, the voluntary organizations came to the rescue and have enabled these programmes to run effectively. Nevertheless, the projected targets could not be reached, which resulted in the improper distribution of resources. As a result, the people belonging to the middle classes could not receive proper welfare and education (Welfare state , 2006). The New Labour government modified welfare to make it compatible with the market forces. This government has been very successful in m ustering the work force. It has increased the employment opportunities for women employees. At the same time it has managed to drastically bring down the poverty level. Nevertheless, it has faced major problems, with regard to the private welfare providers. The New Labour has found it quite difficult to either control or motivate these welfare providers. It has also met with mixed success in respect of achieving the market goals, ensuring sufficient income for everyone and providing adequate motivation.

Saturday, November 2, 2019

Gender stratification Essay Example | Topics and Well Written Essays - 1750 words

Gender stratification - Essay Example Sexism, as used in this context, refers to the situation in which men are seen as superior beings and therefore, regarded as better suited to take on challenging tasks and education fields. On practical perspective, sexism has had severe consequences on women. As widely cited, sexism has always made women to strive to avoid impressing careers often seen as belonging to men. Perhaps, this might be hinged on the fact that their objective is to avoid the societal impression that they are much less desirable as mothers or spouses or even less feminine. Gender stratification often encompasses all the aspects of a person’s social life cutting across the social classes. As such, it relates the probabilities of both genders to the unequal access to property, power and prestige due to the sex differences. This area of interest explores social patterns coupled with cultural practices. When one dives into the mechanics of society workings, certain features are common to each and every co mmunity. In connection to this, there also exist differences in characteristics, traditions and customs. More particularly the differences observed in institutions of learning concerning the fields of science, technology, engineering and mathematics clearly points out this extended form of stratification. Gender identity is the classification of one as either male or female. It is how an individual sees himself or herself. It is the apparent manifestations that result from the personality of an individual. It has the ability to reflect on ones gender identity. Gender identity is self identified and results from intrinsic and extrinsic factors. Many at times gender identity can be confused with gender roles. The latter denotes behavior manifested by factors acquired through observation; this can be exemplified by behavior and appearance. Thus, the gender role is often an outward expression of a person’s gender identity. This article will endeavor to expound on such gender stra tification, with a focus on gender construction, gender socialization and the role of media. This being the case, five articles will be analyzed in a move to have a broader view of this discussion. Body According to the Broyles (2009) the gender pay gap of women in the United States that experiences and education accounted for most of the widespread gender gap. According to the findings of this article, work function and the employer accounts for most of the pay gap. Indeed, women hold positions in the lower paying chemistry positions. This article, well points out that work place diversity within the STEM professions is less likely to occur without the wage parity between men and women in the STEM professions. Elaborating further on this subject, this article asserts that, a way of achieving gender pay equity in the STEM professions must involve the federal tax incentives in order to ensure compliance with the standards stipulated by the federal pay equity standards. Giving a back up on this issue, the article by Shapiro and Williams point it out that, stereotype threats have played a role in undermining women performance as well as, reducing the interests of women in STEM fields (Shapiro & Williams 74). In one study, they observed that negative stereotypes presented by parents and the teachers shaped the interests of women and their abilities in the performance of STEM field. Indeed their