Human Rights Essay Example for Free

Human Rights Essay Human rights are commonly understood as inalienable fundamental rights to which a person is inherently entitled simply because she or he is a human being. Human rights are thus conceived as universal and egalitarian . These rights may exist as natural rights or as legal rights, in local, regional, national, and international law. The doctrine of human rights in international practice, within international law, global and regional institutions, in the policies of states and in the activities of non-governmental organizations, has been a cornerstone of public policy around the world. The idea of human rights states, if the public discourse of peacetime global society can be said to have a common moral language, it is that of human rights. Despite this, the strong claims made by the doctrine of human rights continue to provoke considerable skepticism and debates about the content, nature and justifications of human rights to this day. Indeed, the question of what is meant by a right is itself controversial and the subject of continued philosophical debate. Many of the basic ideas that animated the human rights movement developed in the aftermath of the Second World War and the atrocities of The Holocaust, culminating in the adoption of the Universal Declaration of Human Rights in Paris by the United Nations General Assembly in 1948. The ancient world did not possess the concept of universal human rights. The true forerunner of human rights discourse was the concept of natural rights which appeared as part of the medieval Natural law tradition that became prominent during the Enlightenment with such philosophers as John Locke, Francis Hutcheson, and Jean-Jacques Burlamaqui, and featured prominently in the political discourse of the American Revolution and the French Revolution. From this foundation, the modern human rights arguments emerged over the latter half of the twentieth century. History of concept  Although ideas of rights and liberty have existed in some form for much of human history, they do not resemble the modern conception of human rights. According to Jack Donnelly, in the ancient world, traditional societies typically have had elaborate systems of duties conceptions of justice, political legitimacy, and human flourishing that sought to realize human dignity, flourishing, or well-being entirely independent of human rights. These institutions and practices are alternative to, rather than different formulations of, human rights. The modern sense of human rights can be traced to Renaissance Europe and the Protestant Reformation, alongside the disappearance of the feudal authoritarianism and religious conservativism that dominated the Middle Ages. One theory is that human rights were developed during the early Modern period, alongside the European secularization of Judeo-Christian ethics. The most commonly held view is that concept of human rights evolved in the West, and that while earlier cultures had important ethical concepts, they generally lacked a concept of human rights. For example, McIntyre argues there is no word for right in any language before 1400. and constituted a form of limited political and legal agreement to address specific political circumstances, in the case of Magna Carta later being recognised in the course of early modern debates about rights. One of the oldest records of human rights is the statute of Kalisz, giving privileges to the Jewish minority in the Kingdom of Poland such as protection from discrimination and hate speech. The earliest conceptualization of human rights is credited to ideas about natural rights emanating from natural law. In particular, the issue of universal rights was introduced by the examination of extending rights to indigenous peoples by Spanish clerics, such as Francisco de Vitoria and Bartolome de Las Casas. In the Valladolid debate, Juan Gines de Sepulveda, who maintained an Aristotelian view of humanity as divided into classes of different worth, argued with Las Casas, who argued in favor of equal rights to freedom of slavery for all humans regardless of race or religion. In Britain in 1683, the English Bill of Rights and the Scottish Claim of Right each made illegal a range of oppressive governmental actions. Two major revolutions occurred during the 18th century, in the United States and in France, leading to the adoption of the United States Declaration of Independence and the French Declaration of the Rights of Man and of the Citizen respectively, both of which established certain legal rights. Additionally, the Virginia Declaration of Rights of 1776 encoded into law a number of fundamental civil rights and civil freedoms. These were followed by developments in philosophy of human rights by philosophers such as Thomas Paine, John Stuart Mill and G. W. F. Hegel during the 18th and 19th centuries. The term human rights probably came into use some time between Paines The Rights of Man and William Lloyd Garrisons 1831 writings in The Liberator, in which he stated that he was trying to enlist his readers in the great cause of human rights. In the 19th century, human rights became a central concern over the issue of slavery. A number of reformers, such as William Wilberforce in Britain, worked towards the abolition of slavery. This was achieved in the British Empire by the Slave Trade Act 1807 and the Slavery Abolition Act 1833. In the United States, all the northern states had abolished the institution of slavery between 1777 and 1804, although southern states clung tightly to the peculiar institution. Conflict and debates over the expansion of slavery to new territories constituted one of the reasons for the southern states secession and the American Civil War. During the reconstruction period immediately following the war, several amendments to the United States Constitution were made. These included the 13th amendment, banning slavery, the 14th amendment, assuring full citizenship and civil rights to all people born in the United States, and the 15th amendment, guaranteeing African Americans the right to vote. Many groups and movements have achieved profound social changes over the course of the 20th century in the name of human rights. In Europe and North America, labour unions brought about laws granting workers the right to strike, establishing minimum work conditions and forbidding or regulating child labor. The womens rights movement succeeded in gaining for many women the right to vote. National liberation movements in many countries succeeded in driving out colonial powers. One of the most influential was Mahatma Gandhis movement to free his native India from British rule. Movements by long-oppressed racial and religious minorities succeeded in many parts of the world, among them the African American Civil Rights Movement, and more recent diverse identity politics movements, on behalf of women and minorities in the United States. The establishment of the International Committee of the Red Cross, the 1864 Lieber Code and the first of the Geneva Conventions in 1864 laid the foundations of International humanitarian law, to be further developed following the two World Wars. The World Wars, and the huge losses of life and gross abuses of human rights that took place during them, were a driving force behind the development of modern human rights instruments. The League of Nations was established in 1919 at the negotiations over the Treaty of Versailles following the end of World War I. The Leagues goals included disarmament, preventing war through collective security, settling disputes between countries through negotiation and diplomacy, and improving global welfare. Enshrined in its charter was a mandate to promote many of the rights later included in the Universal Declaration of Human Rights. At the 1945 Yalta Conference, the Allied Powers agreed to create a new body to supplant the Leagues role; this was to be the United Nations. The United Nations has played an important role in international human-rights law since its creation. Following the World Wars, the United Nations and its members developed much of the discourse and the bodies of law that now make up international humanitarian law and international human rights law. Philosophy The philosophy of human rights attempts to examine the underlying basis of the concept of human rights and critically looks at its content and justification. Several theoretical approaches have been advanced to explain how and why human rights have become a part of social expectations. One of the oldest Western philosophies of human rights is that they are a product of a natural law, stemming from different philosophical or religious grounds. Other theories hold that human

Stimuli Sensitive Polymers Types and Applications

Stimuli Sensitive Polymers Types and Applications The stimuli sensitive polymers have proved its applicability in forming hydro-gels [1], drug delivery[2] and target specificity[3]. Some stimuli sensitive polymers occur in nature likeeg, chitosan, cellulose, xyloglucan and many of them are routinely synthesized like, poly(N-isopropylacrylamide) (PNIPAAm) and co-polymers of PNIPAAm[4]. Nature has designed complex structures in response to various external stimuli. For example, the nano-composite structure of collagen fibrils in sea cucumber alters stiffness of its inner dermis[5]. This alteration of connective tissue is reversible, which acts as a defense mechanism[6, 7]. Capadona etal.,synthesized a chemo-responsive polymeric nano-composite structure, which mimics the response of collagen fibrils when exposed to similar physiological conditions. This polymeric nano-composite is based on ethylene oxide-epichlorohydrin copolymer on to which rigid nanofiber network of cellulose was assimilated [8]. Structure of cellulose whiskers, ethylene oxide-epichlorohydrin and polyvinyl acetate matrix polymer. Cellulose whiskers was isolated from tunicate cellulose pulp by sulfuric acid hydrolysis[9].Study of nanocompositeisbased on a rubber like ethylene oxide–epichlorohydrin (1:1) copolymer (EO-EPI) into which arigid cellulose nanofiber network was assimilated [9]. Naturally derived stimuli sensitive polymers have inherent properties like biocompatibility, efficient degradation of byproducts and specific biological interactions, these polymers have limitations like limited availability, batch to batch variation resulting in composition, poor mechanical strength as compared to synthetic stimuli sensitive polymers. Naturally derived stimuli sensitive polymers like chitosan, a polysaccharide, which is not stimuli sensitive but could be made stimuli sensitive by mixing with glycerophosphate, other examples are cellulose derivatives like methyl cellulose, hydroxypropylmethyl cellulose[10]. A list of naturally derived stimuli sensitive polymers along with chemical structures is mention in table 1. 1.1 Stimuli responsive polymers Synthetic polymers have proved there applicability as therapeutic agent in drug delivery. These polymers showbetter pharmacokinetic property with greater ability for tissue targeting. The synthetic polymershows response when stimulated by external stimuli hence, they are called smart polymer or stimuli responsive polymer [15]. The stimuli-responsive polymer works on the principle of identification, evaluation of external signal and then by changing its structural conformation[16].These stimuli are classified as physical (temperature, light, electrical field), chemical (pH,ion, redox)[17], and biological responses.This results in change in a conformation, alteration in partition coefficient or solubility, drug release or more than one change at same time[18]. Physical responsive polymers Some polymers respond to physical stimuli like temperature, light, electrical field, magnetic field,etc.Polymers which become insoluble on heating, have lower critical solution temperature (LCST) like, PNIPAM [19], and those which become soluble on heating have upper critical solution temperature (UCST) like, poly (2-phenyl-2-oxazoline) (PPhOx) [20]. Temperature sensitive polymers Thermo-responsive polymers utilize small changein temperature to cause macroscopic alteration in polymer material [21]. Various types of thermo-responsive fluorescent polymers like a) PNIPAAmb) PNIPAAm-fluorescent labeled c)PNIPAAm-co-butyl methacrylate-fluorescent labeled, a hydrophobic co-polymer butyl methacrylate (BMA) was used to lower LCST to a precise temperature d) PNIPAAm-co-DMAPAAm-fluorescent labeled] (Figure. 2), N,N-dimethylaminopropylacrylamide(DMAPAAm) causes increase in LCST throughhydrophilization of polymeric chain,where synthesized, which shows thermo selective cellular uptake, enables determination of normal and pathological cell[21]. Light sensitive polymers The light sensitive polymers undergo photochromism, in which, an reversible chemical transformation occurs between two isomeric forms of same structure after absorption of light[22]. Absorption of light leads to photochromism which results alteration in absorption spectra[23]. Pericyclic reaction, dissociation process, cis-trans isomerization, electron transfer(oxidation-reduction) and intramolecular hydrogen transfer or group transfer are the mechanisms involved in it[24]. A reversible contraction and expansions in shape and volumes of photochromic light crystal elastomers (LCE) in response to light stimulation.These LCE filmscontainpoly(siloxane) as main chain and cross-linkedchromo-thermicazobenzene, this film was placed on solid support, which helps maintaining temperature to 85Â °c. 1.1.2 Chemical responsive polymers Polymer which exhibits change in configuration or which responds to chemical stimuli like pH, ion and other stimuli are known as chemical responsive polymers like, poly(methylacrylate)[25]. 1.1.2.1 pH responsive polymers pH responsive polymers contain pendant reactive groups which when are cross-linked with other polymer forming hydrogel shows response to stimulus like pH [25]. In recent years, muchwork has been exploredon co-polymerization of pH and temperature sensitive monomers[17, 26]. Graft co-polymers were synthesized to show temperature and pH sensitivity. A side chain temperature sensitive polymer (Figure 4.), the amino terminal ofNIPAAm was graftedon a carboxyl group of pH sensitive backbone polymer, like poly(acetic acid) (PAAc), in the presence of dicyclohexylcarbodiimide (DCC) and methanol byusing coupling method[26]. Stimuli sensitive polymer-dye conjugation Dyes or indicatorsare used to sense or react to particular stimuli like pH and temperature [27]. Some indicator changes color in H+ and OH ion solution due to which they are use as pH sensitive dyes and those which changes color by deflection in temperature are use as temperature sensitive dyes [27]. A list of thermo-chromic polymer-dye conjugations are shown in table 2. The novel chromogenic polymer gel network was synthesized by mixing poly(alkoxy) derivative with bromothymol blue, which yields transparent green gel (Figure 5.), at 33Â °c, green gel turns intolight yellow gel with gradual increase in temperature[29]. In table 2, list of different chromogenic polymer gel networks arementioned.Poly(alkoxy) gel network was used to form complex with other dyes like, nitrazin yellow, where, color of gel network changes from blue to green. Similarly, for chlorophenol red, where color changes from red to yellow PVA-borax-cresol, phenol substituted dye (cresol) was conjugated with PVA-borax complex to obtain thermochromic hydrogel. Other example, PVA-borax-2,6-diphenyl-4-(2,4,6-triphenylpyridinio)phenolate (DTPP) forms reversible thermochromic hydrogel. Such system shows color change and increase in absorption by a gradual increase of temperature. The absorption spectrum of DTPP explains dependency of absorbance on temperature causes bathochromic shift of absorption maximum [28]. InBorax-PVA-DTPP network,DTPP was embedded in PVA-borax gel matrix, boric acid is cross linked to PVA polymer that is, borate ions reacts with hydroxyl group present on PVA to form monodiol-borate complex and didiol-borate complex [30]. Another example of gel containing dye composed of two polymers (PVA and polyether) includes addition of zwitterionicsurfactant, which is a dipolar surfactant,was selected to avoid strong ionic interaction with anionic dye. This surfactant, like, sulfobetain forms aggregates above its critical micelle concentration therefore, it can influence U.V-absorption spectra of a water soluble dye like phenol red as shown in [31]. The dye can also be conjugated with dendrimer to enhance imaging applications and for metal ion probing[32]. For example, generation 5 poly(amidoamine) [G5(PAMAM)] dendrimercontaining 128 surface sites which can incorporate 0 to7 dyes like, 6-carboxytetramethylrhodamine succinimdyl ester (TAMRA), fluorescein. Acetylation yields complete conjugate of dendrimer and dye [33]. nano sized stimuli sensitive polymers have been proved to show response to external signaling [34]. pH sensitive system was prepared by the combination of two modified pH sensitive indicator dyes like, N-fluoresceinylacrylamide (FA), and N-acrylamide-NÂ ´-rhodamine B thiourea (Rh B) (Figure. 11).These two functional monomeric dyes were copolymerized with acrylamide and methylenebis(acrylamide) in w/o micro-emulsion to form dye conjugated poly(acrylamide nanoparticles [35]. Synthesis ofN-fluoresceinylacrylamide- N-acrylamide-Nˈ-rhodamine B thiourea (FA-Rh B)copolymerized nanoparticles. The two functional monomeric dyes FA and Rh Bwere co-polymerized with acrylamide and methylenebis acrylamide in w/o micro-emulsion [35]. Fluorescence emission spectra of polyacrylamide nanoparticle conjugated with fluorescein and rhodamine dye. The fluorescence emission intensity of Rh B remains unchanged with increasing pH whereas that of FA increases. An amine functionalized RAFT co-polymer poly {N-(2-hydroxypropyl) methacrylamide-bN-[3-(dimethylamino)propyl] methacrylate} {poly (HPMA258b-DMAPMA13)} was labeled by fluorescent dye like, 6-(fluorescein-5-carboxamido)hexanoic acid, succinimidyl ester (5-SFX) using anhydrous DMF along with triethanolamine which catalysis the reaction [36]. The primary amine of poly(HPMA258-b-DMAPMA13) is more reactive than tertiary thiol group this allows conjugation of 5-SFX with poly(HPMA258-b-DMAPMA13Â ­). ÃŽ ²-cyclodextrinis cyclic oligosaccharide [37], which has been proved for large number of applications like, increasing solubility [38], detection of compounds [39], immobilization of toxic compounds [40], drug release [41] etc. Some dyes were conjugated in complexing agent like an azo dye inside ÃŽ ²-cyclodextrincavity.Azo dye like methyl red indicator shows color change from yellow to red as pH decreases, this is because of the protonation of azo group (Figure 14.). Methyl red (MR) shows yellow color when complexes with ÃŽ ²-CD even in acidic pH 4.The complex was formed in dimethylacetoamide by using an condensing agent like, dicyclohexylcarbodiimide, it becomes useful in detection of neutral species which will act as guest inside MR-ÃŽ ²-CD complex and will replace MR, which changes its color to red [42]. Role of polymer-dye conjugation in cellular uptake Cellular uptake consist of endocytosis process in which extracellular compounds are captured by plasma membrane forming vesicles. Along with endocytosis there are other methods like, receptor mediated pathway, phagocytosis and micro-pinocytosis[43]. The plasma membrane of a eukaryotic cell has a barrier which allows small and uncharged molecules to pass through it[44].The nano sized polymers, despiteplasma membrane barrier, can irreversibly interact with lipid membraneby insertion of dangling side chains into the hydrophobic region of cell, which can be explained by molecular dynamics[45].Polymer like 2-methcryloyloxyethyl phosphorylcholine (MPC) was copolymerized with n-butyl methacrylate (BMA) forming poly(MPC-co-BMA)[46],thecovalentlylabeledrhodamine Btopoly(MPC-co-BMA) (rhoPMB)was synthesized using free radical polymerization method with perbutyl-ND as an initiator.RhoPMB30 was distributed inside live HepG2 cell (a human hepatocellular liver carcinoma cell line). Natural polymer is applicable in biomedical, environmental science and agricultural field like, hydrophobically modified glycol chitosan (HGC) that can form stable nanoparticles. HGC shows prolonged blood circulation period when the particle size is controlled. It accumulates selectively inside tumor cell when administered systemically [47] and applicable in delivering various therapeutic agents like, peptides, genes and small anticancer drugs [43]. The polymer conjugate probes are applicable for penetration inside the membrane of tumor cell for treatment[48], detection[49] or diagnosis[50, 51]. Further study for the conjugation ofpolymer and pH sensitive dye to form a reusable system which will sense or exhibit color change at different pH ranges.

Evidence and Theories of Supermassive Black Holes

Evidence and Theories of Supermassive Black Holes Supermassive Black Holes are at the centres of galaxies: The evidence for their existence and the theories for their formation and effect on the evolution of galaxies. Supermassive Black Holes are an area of astronomy that have been significantly studied and with thanks to the advance in technology, scientists have managed to better understand how they are formed and the impact they have on the evolution of galaxies. It is first wise to look at the definition of what a black hole is compared to a Supermassive Black Holes. NASAs World Book (2004) defines a black hole as a region of space whose gravitational force is so strong that nothing can escape from it. Scientists believe that a Supermassive Black Hole have the same characteristics as a black hole, with the main difference being, as the name Supermassive suggests, the size of the black hole. Many astronomers and scientists believe that a Supermassive Black Hole is the largest variety of black hole within a galaxy. What most have also believed is that as well as being the largest type of black hole, these Supermassive Black Holes can be found at the centre of galaxies. This essay will therefore look at the evidence for the existence of these Supermassive Black Holes, as well as theories for their formation and the effect they have on the evolution of galaxies. Firstly we should look at the evidence that suggests these Supermassive Black Holes exist at the centre of galaxies. Astronomers and scientists at first found it difficult to prove that black holes do exist in our galaxies. In 1916, Albert Einstein, one of the most well known physicists created his General Relativity theory. Although his theory was first published in 1916, it could be seen to indicate there could be objects in space in which his theory applies to. The theory of Einstein would suggest that there could be an object that alters both space and time, so much so that not even light can escape from it. This is what many modern scientists believe that a black hole is. Many scientists believe that the gravitational force that comes from these black holes is far too strong for anything to escape its pull, including light, which would then explain how these black holes appear invisible. To help prove the existence of this invisible force therefore, Theodore P. Snow (1991, p.514 ) suggests that the best chance of detecting a black holeis to look for an invisible object whose mass is too great to be anything else. Scientists have therefore looked at the movement of stars around this invisible object in several different galaxies, and thanks to these measurements in 1914 the Hubble Space Telescope (2003,p.198) managed to determine the mass of the object to be several million times the size of the sun was present in the stars orbit. Scientists and astronomers believe that the only object that could have this effect on the stars orbit and have as high a mass would have to be a Supermassive Black Hole. The Telegraph in December 2008, reported that a group of scientists had spent the last 16 years studying whether there was a Supermassive Black Hole at the centre of our galaxy, in the Milky Way. As before they studied the stars orbit circling the invisible object and found that the mass seems to be about four millions times the size of the sun. This would therefo re suggest that Supermassive Black Holes are at the centre of galaxies, including our own. Astronomers and Scientists therefore believe that if you measure the mass of a dark object and that it has a high mass in a small area of space it is most probably a Supermassive Black Hole. Once scientists and astronomers had seemed to provide substantial evidence to the existence of these Supermassive Black Holes, they did not stop their research in this area. Many sceptics believed that if these objects existed in our galaxy how did they appear? Thus scientists and astronomers continued to research Supermassive Black Holes and how they have been formed. Kuhn and Koupelis (2001, p.496) state that astronomers predicted the existence of black holes in the 1930s when they realized that a stars mass may cause it to collapse beyond neutron degeneracy. This is an explanation for how black holes are formed, however the majority of astronomers and scientists believe there could be more than one explanation for how Supermassive Black Holes are formed. One model that scientists believe could explain the formation of these objects in our galaxy is looking at the early years of the stars. This model looks at how the first stars were formed without a suitable make-up which could ha ve resulted in them leaving behind what is known as black hole seeds. The idea that black holes have been formed by these seeds has been studied in recent years with Volonteri, Haardt Madau (2003) believed that these black holes may have stemmed from seeds of the early stars, meaning Supermassive Black Holes could be millions of years old, which could explain how they are at the centre of our galaxies. Another model that looks to describe the formation of these Supermassive Black Holes is the idea that they are in fact formed due to the collapse of a large gas clouds. These large gas clouds would collapse into a rotating neutron star of an extremely high mass, this star would be unstable due it not containing the correct electron make-up and instead of a supernova explosion it would result in a Supermassive Black Hole as being its only remaining by-product. Haehnelt Rees (1993) studied this idea that the Supermassive Black Holes were formed due to the collapse of large gas clouds and have suggested that this model helps give a more modern understanding of how black holes are formed. Another model which has been suggested by a minority of researchers is the idea that Supermassive Black Holes are a by-product of the beginning of the galaxy, the Big Bang. These scientists believe that after the Big Bang, the pressure of the newly formed galaxy would be extremely high, so much so, that it could have resulted in areas of high density that would have formed black holes. They suggest that many of these black holes would not have lasted a long period of time as the galaxy was expanding, however some may still exist to this present day. According to J.PLuminet (1992, p.177) if this is the case, the galaxy would expand around the black hole leaving it and the centre of the galaxy. With researchers now able to provide evidence that Supermassive Black Holes do exist at the centre of our galaxies and being able to give various substantial evidence on the formation of these black holes, astronomers and scientists have also looked to explain how they have an effect on the evolution of galaxies. As we have seen, many researchers believe that there are Supermassive Black Holes at the centre of the galaxies. Researchers believe that roughly ten percent of the black holes contain high levels of ionised gas, which is released in opposite directions of the black hole. This is most likely to be released as kinetic energy. Astronomers believe that this would have an effect on how stars behave and play a vital role in the evolution of galaxies within the universe. For many years astronomers and scientists have been able to find a correlation between the mass of the Supermassive Black Holes and the galaxy it inhabits. In other words, many researchers believe that the size of the black hole does have an effect on the mass of that galaxy. More recently however researchers have managed to acquire some knowledge on how else a Supermassive Black Hole has an impact on its galaxy. Scientists have studied the spin of the black holes, as they believe this could result in the ionised gas being released from the black hole, which would then in turn control the growth of the galaxy it is at the centre of. Another way that these Supermassive Black Holes could have an impact on the evolution of galaxies could be as a result of two black holes colliding. Researchers have recently discovered what will happen when two Supermassive Black Holes collide with one another. The gravitational attraction between the two is believed to upset the stars positions surrounding the galaxies centre, but many researchers did not know whether the two would attract together to form one large supermassive black hole or whether they would repel from one another? Scientists have recently b een able to answer this thanks to a collision that occurred between a large and small black hole. The results of the collision were as expected with the stars surrounding the centre being upset and altered. The question to whether they would form a larger black hole or repel was also answered, as the two became closer they repel and eject the black hole from its galaxy, sending it at high speeds across space surviving on its accretion disk alone. According to Govert Schilling (2002, p.233) many researchers believe that thanks to this phenomenon that took place, they may be able to further explain formation of galaxies and their black holes, with further research and more advances in technology scientists and astronomers will continue to study Supermassive Black Holes. As we have seen from the proposed research put forward by various astronomers and scientists, it seems more than likely that Supermassive Black Holes do exist at the centre of our galaxies. Thanks to the research, they have helped in the understanding on how they exist, as being large invisible objects with an extremely large mass and large gravitational pull that is at the centre of every galaxy. As well as this, astronomers and scientists have also been able to explain how these objects could have formed in our galaxy, by looking at different models which include dying stars being turned into black holes millions of years ago, to models which suggest they are formed due to collapsing dense gas clouds. We have also seen researchers look at the impact such objects have had in our galaxies, and seen suggestions that these Supermassive Black Holes helped to create the way a galaxy looks, such as its stars positions and the galaxies mass. With further research and more advances in techn ology, the future could see more results into this area of astronomy, with researchers looking at a clearer definition to how these Supermassive Black Holes are formed and what effect they have on the evolution of the galaxies they inhabit. References Alleyne ,R. Proof that Albert Einsteins black holes do exist, claim scientists 2008, Telegraph, http://www.telegraph.co.uk/science/science-news/3690822/Proof-that-Albert-Einsteins-black-holes-do-exist-claim-scientists.html Haehnelt M. G., Rees M. J., 1993, MNRAS, 263, 168 Kuhn, K.F, Koupelis, T. (2001) In Quest of the Universe., 3rd Ed. Jones and Bartlett Publishers Inc, London. Livio. M, Noll. K, Stiavelli, M. (2003) A Decade of Hubble Space Telescope Science, Cambridge University Press, Cambridge U.K Luminet, J.P. (1992) Black Holes Cambridge University Press, New York McClintock, Jeffrey E. Black hole. World Book Online Reference Center. 2004. World Book, Inc. http://www.worldbookonline.com/wb/Article?id=ar062594. Schilling, G. (2002) Flash! The Hunt for the Biggest Explosions in the Universe. Cambridge University Press, United Kingdom Snow, T.P (1991) The Dynamic Universe: An Introduction to Astronomy, 4th Ed. West Publishing Company, St. Paul Volonteri M., Haardt F., Madau P., 2003, ApJ, 582, 559 Zeilik, M. (2002) Astronomy, The Evolving Universe 9th Edition, PRESS SYNDICATE OF THE UNIVERSITY OF CAMBRIDGE, Cambridge, United Kingdom. Craig Jonathan Muir Matriculation: 200804070 1

Jesus Christ and the Red Cross Knight Essay -- essays papers

Jesus Christ and the Red Cross Knight In his first book of The Faerie Queen, Edmund Spenser recites the tale of the Red Cross Knight and the many trials and tribulations that he encounters along his quest to save Princess Una's kingdom. Throughout the tale Spenser makes many allusions to the Red Cross Knight being a Christ-like character. All of the qualities and attributes which Red Cross develops along the way lead up to his personification of Christ on the third day of the dragon fight. Many of these allusions are contained in small images and references. The first image that Spenser uses to relate the tale's significance to Christianity and Christ appears in canto I stanza iv: A lovely Ladie rode him faire beside, Upon a lowly Asse more white then snow, Yet she much whiter,... Seemed in heart some hidden care she had, And by her line a milke white lambe she lad. (I.iv.) An image from the New Testament can be grasped from this scene. Picture Red Cross as Joseph on his way to Bethlehem leading the Virgin Mother Mary, Princess Una, who is riding on an ass carrying Jesus Christ the Lamb of God in her womb or in this case behind her. Although through this image Red Cross is seen as Joseph and not Christ, it is understood later in the story that the lamb represents what Red Cross could become through the help of Una and the trials he will face during his quest. The vision of Una as the virgin Mother of Christ solidifies her as having such characteristics as chastity, truth, and innocence. Each of these cement Una in the role of a perfect Romance maiden, one who can lead her champion to his utmost potential: that of a true romance hero. The adventures of Red Cross mirror the temptation in the dessert ... ...dragon with his sword, which represents "God's Word", he aims at the mouth of the beast, "exemplifying Christ destroying Original Sin at the source and or Satan. (pg.150; foot#6)" By ideologically "killing Satan" Red Cross has reached his full potential and in the future will become St. George. In this first book of The Fairie Queen Edmund Spenser embodies in his main character, the Red Cross Knight, humanity's battle with Satan and evil. Throughout the epic the Red Cross Knight and even Prince Arthur are, continually representing Jesus Christ and his victories on the Cross and at the end of time. They are both representing Jesus Christ in all that they do and the qualities of a good Christian. This personification of Christ culminates at the end of the story with the Red Cross Knight's victory over the dragon. Bibliography: Edmund Spenser's Fairie Queen

Formal Commentary On One Hundred Years Of Solitude :: essays research papers

Formal Commentary How does Garcia Mà ¡rquez use imagery to create the dramatic situation of Prudencio’s Death?   Ã‚  Ã‚  Ã‚  Ã‚  The image of conflict which Garcia Mà ¡rquez draws, is only a beginning to an endless struggle in the Buendà ­a family. Garcia Mà ¡rquez creates this passage, not only as a Genesis, but as a way to warn the reader of the fate of the Buendà ­a name. After finishing this passage, I was left not with a feeling of closure, but with a feeling of lingering doubt and wonder. Josà © Arcadio Buendà ­a seeks closure himself because of rumors of being impotent. This rumor starts because of the Buendà ­a curse, the pig’s tail. I realized this was only the first of many following conflicts, when Josà © Arcadio Buendà ­a attempts to resolve the situation by killing Prudencio Aguilar. But Prudencio doesn’t die. He lives on, and haunts Josà © Arcadio Buendà ­a until he is forced to leave for Macondo. Garcia Mà ¡rquez creates a Genesis in the novel by the murder of Prudencio Aguilar. This important passage in the beginning of the book brings about its point through excellent uses of diction and word choice. Words like â€Å"tormented† and â€Å"desolation† paint a vivid picture in my mind. The vast majority of adjectives and adverbs lack happiness and overflow with conflict. â€Å"Livid†, â€Å"sad†, â€Å"anxiety†, are only three of these descriptive words, which Garcia Marquez uses to paint this small image in my mind. Anxiety, to me is not only a pain but an endless pain. Suffering which lasts indefinitely. This new indefinite pain brought into the Buendà ­a family by this passage, like anxiety, continues. The dramatic situation in this passage brings about a continual plague of death and conflict.

Hotel Security Essay

Hotel Security Matthew Acevedo July 10, 2011 HTT/200 Hotel Security Security came forcefully to the attention of hotel operators in 1976 when a well-known singer, Connie Francis, was raped at knifepoint in a Long Island motel.(online reading, pg.309) Good security is what makes are breaks a good hotel. To insure that you have great security you have to address where it’s needed the most, where it might be an issue and what are the biggest threats to your guest. According to many different websites identity theft is becoming a major with hackers breaching computers in major hotel chains and gaining access to thousands upon thousands of guests personal information including; home addresses, credit card numbers and personal phone numbers. (Bates, 2008) To help reduce the risk of hackers it would be smart to make sure your database is secured through a well-known and respected company that deals with internet hackers. Though it’s impossible to fully stop hacking you can make sure you minimize the risk significantly with the right resources. A big issue with security would be fraud and theft. According to the U.S. Department of Justice Statistics, identity theft is now passing up drug trafficking as the number one crime in the nation. (Itrc, 2006) To solve some of these solution the easy steps would be to makes sure to check every guests ID and credit card against each other and have a fake ID decoder behind every desk to insure that no one gets away with using someone else’s credit card. Theft is also a big concern with guests that stay in hotels. Many hotels have an open-door policy that lets maids prop open doors for hours on end while they clean that floor. That leaves room wide open for anyone to just walk into a room and take whatever they want or rack up huge bills on movie rental or minibar items. According to a study done in 2003 many hotels have not changes there policies after the attacks of 9/11. Many hotels that were rated higher with security had already established good security and didn’t need to make changes. (Myers, 2003) There is no base-line for hotel security so it’s hard to say if the standard went up after the September 11 attacks of 2001. Conclusion Most of the security issue seems to be that of theft, either of personal items or identity. To help solve the ongoing issue there are dozens of companies working to shut down the cyber-attacks of hotel databases around the world. Until then it is the job of the hotel to take every precaution necessary to insure that guest feel as safe and comfortable as possible while staying in their establishment. References

Black Genocide Essay

â€Å"Black Genocide in the 21st century† also called â€Å"Maafa† is an anti-abortionist documentary made in 2009 that speaks about the relevance of birth control, White America and Black America, Planned Parenthood and how it was established, also, the conspiracy behind abortion. The movie also deeply discusses the argument between abortion being genocide and it specifically targeting African Americans. Black Genocide was a very intriguing and interesting piece of material that filled my knowledge with much more than I had intended it doing. Before watching this video, I knew a little about abortion but not about the black genocide part. You see, I knew that abortion was a way for the government to obtain legal rights to abort children who weren’t able to be cared for but I didn’t know the government was using abortion as a way to limit the black population. I also knew that African Americans were having a lot of abortions and there were, and still is a lot of abortion facilities but never put together the idea of how they were getting access to this information, furthermore, the connection between eugenics and genocide. During the film, I learned so much information that is disgusted me and changed many of my views toward abortion and other things. I learned that in the early 1800’s, Americans feared retribution and resurrection because slavery was supposed to have ended. Intermarriage also lead to the loss of international purity and for that, they had a plan of colonization. Colonization was an affect that took place, and caused African Americans to be sent back to Africa. After the colonization, the new philosophy was established and was called â€Å"eugenics†, the perfect solution to what was known as â€Å"negro dilemma.† I also learned that Eugenics believed that Africans were inferior and without guidance, they couldn’t make it. Margaret Sanger was the founder of the â€Å"American birth control league† and was successful for promoting abortion and birth control. After watching the 21st century of black genocide, I wanted to know more about the situation with the NAACP and why the government still hasn’t publicly announced the conflict between the protesters and there undercover targets. I’d also like to know more about the positive and negative eugenics and why White America was considered positive eugenics when it was used to try and dominate the black parts of America and used as a companion to exterminate African Americans. I’d also like to know more about Planned Parenthood and to see if the facilities were still being targeted in minority places. I’d also like to know more about White America and the Planned Parenthood meetings, and also if Planned Parenthood groups still targeted low poverty neighborhoods of different race, such as Caucasians.