Black Holes Essays (1293 words) - Black Holes, Event Horizon

Black Holes Everyday we look out upon the night sky, wondering and dreaming of what lies beyond our planet. The universe that we live in is so diverse and unique, and it interests us to learn about all the variance that lies beyond our grasp. Within this marvel of wonders our universe holds a mystery that is very difficult to understand because of the complications that arise when trying to examine and explore the principles of space. That mystery happens to be that of the ever clandestine, black hole. This essay will hopefully give you the knowledge and understanding of the concepts, properties, and processes involved with the space phenomenon of the black hole. It will describe how a black hole is generally formed, how it functions, and the effects it has on the universe. In order to understand what exactly a black hole is, we must first take a look at the basis for the cause of a black hole. All black holes are formed from the gravitational collapse of a star, usually having a great, massive, core. A star is created when huge, gigantic, gas clouds bind together due to attractive forces and form a hot core, combined from all the energy of the two gas clouds. This energy produced is so great when it first collides, that a nuclear reaction occurs and the gases within the star start to burn continuously. The Hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such as Carbon, Oxygen, and Helium are consumed. This chain reaction fuels the star for millions or billions of years depending upon the amount of gases there are. The star manages to avoid collapsing at this point because of the equilibrium achieved by itself. The gravitational pull from the core of the star is equal to the gravitational pull of the gases forming a type of orbit, however when this equality is broken the star can go into several different stages. Usually if the star is small in mass, most of the gases will be consumed while some of it escapes. This occurs because there is not a tremendous gravitational pull upon those gases and therefore the star weakens and becomes smaller. It is then referred to as a White Dwarf. If the star was to have a larger mass however, then it may possibly Supernova, meaning that the nuclear fusion within the star simply goes out of control causing the star to explode. After exploding a fraction of the star is usually left (if it has not turned into pure gas) and that fraction of the star is known as a neutron star. A black hole is one of the last option that a star may take. If the core of the star is so massive (approximately 6-8 solar masses; one solar mass being equal to the sun's mass) then it is most likely that when the star's gases are almost consumed those gases will collapse inward, forced into the core by the gravitational force laid upon them. After a black hole is created, the gravitational force continues to pull in space debris and other type of matters to help add to the mass of the core, making the hole stronger and more powerful. Most black holes tend to be in a consistent spinning motion. This motion absorbs various matter and spins it within the ring (known as the Event Horizon) that is formed around the black hole. The matter keeps within the Event Horizon until it has spun into the centre where it is concentrated within the core adding to the mass. Such spinning black holes are known as Kerr Black Holes. Most black holes orbit around stars due to the fact that they once were a star, and this may cause some problems for the neighboring stars. If a black hole gets powerful enough it may actually pull a star into it and disrupt the orbit of many other stars. The black hole could then grow even stronger (from the star's mass) as to possibly absorb another. When a black hole absorbs a star, the star is first pulled into the Ergosphere, which sweeps all the matter into the Event Horizon, named for it's flat horizontal

Importance of Effective Communication To Elementary Teaching Essay

Importance of Effective Communication To Elementary Teaching profession - Essay Example If the teacher truly does want to create multivoiced classrooms, she/he needs to provide ways for all of the students to participate. One among is the effective communication of the teacher with the students. Communication apprehension (CA) has been defined as an "individual level of fear or anxiety associated with either real or anticipated communication with another person or persons" (McCroskey, 1977). The school environment can play a vital role in the prevention of CA and make the students feel as part of the team. Fisher (1995) describes a school classroom that encourages a sense of community: "For me, community in the classroom is the amalgamation of rigorous learning and caring about one another. Community is built through routines, procedures, and attitudes that evolve over time as the teacher and children develop trust in one another. The teacher can create community feeling in the students by creating a warm, easygoing climate in the classroom --helping students get to know one another at the beginning of the year --using drama and role-playing situations --having students speak to the class in groups or panels rather than individually --allowing students to work with classmates with whom they feel most comfortable --having students speak from their seats rather than from the front of the room --presenting students with oral activi

Comparative Advantage and Corporate Social Responsibility Assignment

Comparative Advantage and Corporate Social Responsibility - Assignment Example To understand more about comparative advantage, the author will feature in an example. In country A, a worker using machinery produces 4 shirts and 4 skirts per hour while in country B which has less machinery, a worker produces 4 shirts and 2 skirts per hour. It is evident that the less efficient country has a comparative advantage in producing shirts. With the absence of trade, the opportunity cost per shirt is 2 skirts. Bearing in mind that the more efficient country has a 1:1 trade-off, the cost per shirt may reduce to as low as 1 skirt depending on the volume of trade. The more efficient country has a comparative advantage in skirts. It would, therefore, make economic sense if the country shifted its shirts production resources to produce more skirts. It would then trade them for shirts. In economics, the net benefits realized by each country are called the gains from trade. The idea of comparative advantage was first mentioned and developed in Adam Smith’s book The Wealt h of Nations. Here, he puts the theory as follows: if a foreign country can supply us with a commodity cheaper than when we ourselves can make it, it is better to buy it from them with gains realized from our own industry. This has to be employed or designed in a way that we have some advantage. David Ricardo, in his 1817 book, On the Principles of Political Economy and Taxation, investigated the advantages and alternatives as well as relative opportunity in an example involving Portugal and England. In his book, he noted that in Portugal, it was possible to produce both cloth and wine using less labor compared to producing the same quantities in England. He also noted that the relative costs met in producing those two goods were different in the two countries.

DEVELOPING BUSINESS PROCESSES & OPERATIONS Essay

DEVELOPING BUSINESS PROCESSES & OPERATIONS - Essay Example In addition, operations management provides an organization with the criteria for imposing by the market where company operates, according to Slack, Alistair and Robert (2013). Bamford and Forrester (2010) define the aim of operations management to cover the process of decision making and enable organization to develop its strategies. It strives to allow the company to satisfy the needs of stakeholders, foster the long-term success and understand how, where and what for the operations should be located, its resources and relationships are established. To be effective in terms of product or service design, developing or manufacturing, delivering and satisfying customers’ needs, an organization or company needs to efficiently manage its operations that would enable it to achieve more benefit from the services and products its produces. Moreover, high quality of these products and services and cost-available position should also be taken into account. For that purpose operational management is an important line management as it helps organization to display its best performance through coordinating and controlling of the resources needed for design, production and operation of business that at the same time give a company to obtain the highest level of efficiency and value add (Waters & Waters, 2002). Operational management of Swedish company that designs and sells ready-to-assemble furniture, appliances, small vehicles and home accessories is the best example of how its effective management led to the success. One of the world’s largest furniture retailers, the turnover of the company is close to four billion dollars. The company’s major idea is to provide the high-quality furniture and accessories at a low price to enable each individual to purchase them. Ikea is also known for its sophisticated design, logistics and distribution concepts (Larcon,

How Might a Securitisation Approach Help to Make Sense of the Research Paper

How Might a Securitisation Approach Help to Make Sense of the So-Called War On Terror - Research Paper Example It is interesting to note that across this war and terror endangered world, bounded by the opportunities and threats afforded by globalization, new forms of autonomy, resistance and organized violence engage equally singular systems of international regulation, humanitarian intervention, and social reconstruction. In this security terrain, those systems of resistance and their opposing forces of regulation and intervention have assumed a networked and nonterritorial appearance. "While states and their security apparatuses remain pivotal, in both camps they situate themselves within and operate through complex governance networks composed of nonstate and private actors." (Mark Duffield 2002) Within the above broad spectrum the political scientists talk about the securitization of public policy defining it as a process by which organizational or political actors use security rationales to support claims for funding particular activities or where the 'security state' uses the rhetoric of external or internal threat as a pretext for entering into new policy fields or developing new powers. However, the most recent threats of terrorism, proliferation of weapons of mass destruction, and the spread of virulent disease together with the continuing spillover effects of 'new' wars have nonetheless created worrying threats like resource and environmental depletion and has also captured the popular imagination in such a way that nations and leaders can no longer remain complacent about the developing situations.   "Human security fits the paradigm of persuasion, just as national security lies at the core of the paradigm of power. While national security is the ideology of a state-centric international order, human security is the ideational basis of a people-centric world order underpinned by a global civil society" (Prof Amitav Acharya 2005)As the definition goes each category of security is determined by the securitizing actors and referent objects and it is also possible that the types of securities may vary across the security sectors.

Pregant Women with HIV Infections Research Paper

Pregant Women with HIV Infections - Research Paper Example Pregnant Women with HIV Infections Part A HIV/AIDS is a disease that has had its implications on society in a very vast manner especially over the last two decades. The disease came to prominence around the year 1987 and since then the number of infections have been on the steady rise. The disease is spread through very many distinct ways. There is the spread of the disease from having many sexual partners, the sharing of sharp objects with a person already infected with the virus and finally yet importantly, there is that of pregnant women transferring the disease to their unborn babies. This paper will be very clear in expressing the issues faced by pregnant women with HIV/AIDS and the various manners through which society observes and treats them. It is important to look at this issue because there is a lot of stigma around concerning these women. The United States views the problem of these women in various perspectives and offers the best that it can through the healthcare syste m to ensure that they receive the amount of care they require. The problems faced by these women are widespread and are all across the world but the different manners through which the healthcare organizations look at them is very important. One of the very important aspects of the issue that the United States health system focuses on is the counseling of these women so that they cannot feel left out or rather feel weird. The women receive treatment in a manner through which they receive the best medical care because there is also the focus on the health condition of the unborn child. The screening of the women is rather imperative for the research of other health issues that may make them weaker. When a person has HIV/AIDS, the white blood cells that are responsible for the guard of the body do not function correctly. It is for this reason that any other health condition is supposed to be given a priority to ensure that the women do not suffer a lot. This was study carried out by t he National Institute of Child Health and Human Development. The United States also takes the issue rather seriously from the manner in which medical practitioners offer the required prophylaxis. The government has a major role to play in this because there are many countries that have bills that have the family of the HIV/AIDS infected patient carrying the burden of paying the bills for the medication. The medication is very important as it assists in the healing of Opportunistic Infections. These infections were reported to have killed around 37% of all pregnant HIV/AIDS patients in the United States over the period between 1990 and 2000. The analysis made it very important for the government to bring in a program that ensured that the deaths resulting from these infections reduced (Adams, 2011). The issue of HIV/AIDS is taken in a rather serious manner in the United States from the number of bills that are passed regarding the issue. One of the bills passed ensured that among all the necessary tests taken by pregnant women when being admitted to hospitals, HIV/AIDS becomes one of them (Adams, 2011). The first step taken is immunization that also assists in protecting the unborn child from contracting the disease. The reason as to why the government decided to make a priority while handling pregnant women is from the manner through which parents’

Real Options Essay Example | Topics and Well Written Essays - 1500 words

Real Options - Essay Example Use of standard techniques to evaluate real optionsTraditionally the use of standard techniques was predominant though lacked merit in its application. The techniques included use discounted cash flows and net present value analysis. Here, future expected cash flows are treated as the present values of the empirical probability measure that reflects the risk of the project under a discounted rate. Cash flows that is expected are highly valued in this approach than any other flexible issue that alters the strategy to market goal realizations. The net present value approach presents management as being passive to their Capital investment. Most analysts account for this real option problem by adjusting the discount rates. However, real options valuation looks at management as being active and they revolve interests with varying market trends. Real options usually bring into action the best contingency plan. Management has a duty to fight any negative occurrences by lowering the possibil ities of exposure and limit the firm’s benefits from uncertainties in the market.The contingent characteristic of profits to be realized in the future of a business, in real options models is exhibited by applying financial option techniques. Using the risk-neutral measure approach comprises the reduction of the probability distribution for the risk being accounted for. Real options valuation accounts for uncertainties in the future of definite parameters that define the value of the business.