Gamma Rays are Part of the High-Energy Universe

Gamma Rays are Part of the High-Energy Universe Everyone has heard of the electromagnetic spectrum. Its a collection of all wavelengths and frequencies of light, from radio and microwave to ultraviolet and gamma. The light we see is called the visible part of the spectrum. The rest of the frequencies and waves are invisible to our eyes, but detectable using special instruments.   Gamma rays are the most energetic part of the spectrum. They have the shortest wavelengths and highest frequencies. These characteristics make them extremely hazardous to life, but they also tell astronomers a lot  about the objects that emit them in the universe. Gamma-rays do occur on Earth, created when cosmic rays hit our atmosphere and interact with the gas molecules. Theyre also a by-product of the decay of radioactive elements, particularly in nuclear explosions and in nuclear reactors. Gamma rays arent always a deadly threat: in medicine, theyre used to treat cancer (among other things). However, there are cosmic sources of these killer photons, and for the longest time, they remained a mystery to astronomers. They stayed that way until telescopes were built that could detect and study these high-energy emissions. Cosmic Sources of Gamma Rays Today, we know much more about this radiation and where it comes from in the universe. Astronomers detect these rays from extremely energetic activities and objects such as supernova explosions, neutron stars, and black hole interactions. These are difficult to study because of the high energies involved, they are sometimes very bright in visible light, and the fact that our atmosphere protects us from most gamma rays. To see these activities properly, astronomers send specialized  instruments to space, so they can see the gamma rays from high above Earths protective blanket of air. NASAs orbiting  Swift satellite and the Fermi Gamma-ray Telescope are among the instruments astronomers currently use to detect and study this radiation. Gamma-ray Bursts Over the past few decades, astronomers have detected extremely strong bursts of gamma rays from various points in the sky. By long, astronomers mean only a few seconds to a few minutes. However, their distances, ranging from millions to billions of light-years away, indicate that these objects and events must be very bright in order to be seen from across the universe.   The so-called gamma-ray bursts are the most energetic and brightest events ever recorded. They can send out prodigious amounts of energy in just a few seconds- more than the Sun will release throughout its entire existence. Until very recently, astronomers could only speculate about what caused such massive explosions. However, recent observations have helped them track down the sources of these events. For example, the Swift satellite detected a gamma-ray burst that came from the birth of a black hole that lay more than 12 billion light-years away from Earth. That is very early in the universes history.   There are shorter bursts, less than two seconds long, which were really a mystery for years. Eventually astronomers linked these events to activities called kilonovae, which occur when two neutron stars or a neutron star or a black hole merge together. At the moment of the merger, they give off short bursts of gamma-rays. They can also emit gravitational waves. The History of Gamma-ray Astronomy Gamma-ray astronomy had its start during the Cold War. Gamma-ray bursts (GRBs) were first detected in the 1960s by the Vela fleet of satellites. At first, people were worried that they were signs of a nuclear attack. Over the next decades, astronomers began searching out the sources of these mysterious pinpoint explosions by searching for optical light (visible light) signals and in ultraviolet, x-ray, and signals. The launch of the Compton Gamma Ray Observatory in 1991 took the search for cosmic sources of gamma rays to new heights. Its observations showed that GRBs occur throughout the universe and not necessarily inside our own Milky Way Galaxy. Since that time, the BeppoSAX observatory, launched by the Italian Space Agency, as well as the High Energy Transient Explorer (launched by NASA) have been used to detect GRBs. The European Space Agencys INTEGRAL mission joined the hunt in 2002. More recently, the Fermi Gamma-ray Telescope has surveyed the sky and charted gamma-ray emitters.   The need for fast detection of GRBs is key to searching out the high-energy events that cause them. For one thing, the very short-burst events die out very quickly, making it difficult to figure out the source. X-satellites can pick up the hunt (since theres usually a related x-ray flare). To help astronomers quickly zero in on a GRB source, the Gamma Ray Bursts Coordinates Network immediately sends out notifications to scientists and institutions involved in studying these outbursts. That way, they can immediately plan follow-up observations using ground-based and space-based optical, radio and X-ray observatories. As astronomers study more of these outbursts, theyll gain a better understanding of the very energetic activities that cause them. The universe is filled with sources of GRBs, so what they learn will also tell us more about the high-energy cosmos.   Fast Facts Gamma rays are the most energetic type of radiation known. They are given off by very energetic objects and processes in the universe.  Gamma rays can also be created in the lab, and this type of radiation is used in some medical applications.Gamma-ray astronomy is done with orbiting satellites that can detect them without interference from Earths atmosphere.

Intercultural managerial communications Term Paper

Intercultural managerial communications - Term Paper Example The study at hand discusses the topic of intercultural managerial communications. In order to elaborate upon the subject, it will include discussions on intercultural myths, how people differ culturally, language and non-verbal sensitivity. It sets out to demonstrate the importance of managers gaining knowledge of various business cultures around the world so they can manage from a global perspective. Without knowing the culture of a place, it would be hard for one to engage in meaningful ventures. Language is a tool for people to communicate their thoughts and non-verbal sensitivity specifically how people decode or perceive the behavior of others, be it with those they have specific relationships with or not. Various cultures have different modes of communication even within their own subculture. It is of utmost importance for business professionals to be sensitive to the different cultures within the regions they operate to successfully communicate in other cultures. Intercultural Managerial Communications The communication in an organization or workplace is described as the conveying of messages with the help of a proper channel and medium to the desired receiver. According to the social constructionist approach, the communication in an organization pertains to the manner in which the use of language establishes various types of social structures, which may include teams, relationships, and networks. Managerial communication also refers to the related aspects of the organizational communication. It is an activity which assists the managers in communicating with the employees as well as amongst each other in the organization. The Managerial Communication facilitates in providing an even flow of information amongst them which directs them towards a mutual goal. Culture Culture is an amassed system of values, rules, norms, experiences and concrete behavior which man adapts from descending generations and aims at passing forward to ascending generations (Nakaya ma and Halualani 2011). In organizations, the word culture reflects on the business practices and the way of doing things. Business professionals have to learn the different business cultures before doing business in various markets so they can minimize the risk of business failure. Obtaining knowledge about different styles of communication, forms of body language, dressing, greetings, negotiation techniques and meeting approaches is vital in gaining successful business relations with like-minded people. Successful leadership engages the subject of intercultural managerial communication through discussing the branches of culture, intercultural myths, how people’s perceptions differ, language, and non-verbal sensitivities. People differ culturally in various ways such as voice pitch, words used, accents and nonverbal communication i.e. body language. In addition, within the cultures, there is a contrast in how people communicate. Certain actions may be acceptable within some cultures and not applicable in others. There are things that one can do in their culture and if they did the same in other cultures, they may be perceived as being undisciplined or offensive. There are also things that one can omit in some cultures and, therefore be perceived as rude in other cultures. For example, people must be sensitive to the different forms of greetings as they travel from one culture to another. Thus, many business profession

Capital Budgeting PROJECT ANALYSIS Essay Example | Topics and Well Written Essays - 1000 words

Capital Budgeting PROJECT ANALYSIS - Essay Example The company’s target market will be the students and friends of the college. The students will be offered the skis at a discounted rate of $250, and the outsiders will purchase the skis at $600. Since the project will be generating revenue, there will be no need of finding other means of funding as the project’s operations are anticipated to generate enough revenue that will be ploughed back as a means of funding. The project was selected for the following reasons: First, project will be beneficial to college in terms of learning and management to the students because they will be exposed to a real-time work environment. The students of Westminster will use the company for their internships where they will be in a position to learn various management and production skills. The company is anticipated to have a stable management that will perform efficiently and effectively because of support and supervision that will be offered by the College’s Centre for Entrepre neurs and the Company’s Board of Directors. If the project is successful, it will benefit the college first, in terms of revenue generation and second, as part of the college the capital invested back into the business will subsequently also increase the asset value of the college. A careful analysis was carried out to inspect the viability of the project in terms of revenue generation, costs, payback, depreciation, rate of returns, and the projects net present value. Initial costs First, an assessment of the costs and commitments that the project will undertake will be as follows. In acquiring the company, the College will incur Total Capital Cost of $ 15,200.35. This amount is inclusive of the equipment and material cost of $15,000 that are required for the continuation of business. The equipment is valued at current market value, and it includes a $2,400 purchase order contract. The costs also involve the total transportation costs of $200, which will be employed in the mo ving truck and labor transport costs. The estimated costs for a single product are computed inclusive of all necessary materials and it is found that for each product to be manufactured the company will be spending $108. The company additionally spends an extra $100 for maintenance purposes. Labor costs have been computed as part of the company’s operating costs, and it is estimated for every three students working for the company, 10 hours a day at a rate of $8 will be costing the company a total of $240 dollars or simply $80 dollars each. Depreciation Factoring depreciation into the investment, it estimated that for the initial investment value to have a fair value of $0, it would take approximately 8 years. The company experiences a sharp depreciation in the second year because this is the estimated time when most of the initial investment materials will be depleted. Cash flow A budget analysis for the company is carried for the first eight years when it is estimated that the fair value of investment will be zero. For the eight years, the company is estimating to have minimum revenue of $10,800. The revenue is generated through a customer base comprising of students and friends of the college who will be buying the skis on a year basis. The students are estimated to buy the skis at a price of $400. The price is discounted because the students are also involved in the manufacturing process. The outsiders will be buying the skis at $600. The estimated revenues the company will

Muslim Empires Essay Example for Free

Muslim Empires Essay The Ottoman Turks consisted of Turkic-speaking nomadic people who had spread westward from Central Asia in the ninth, tenth, and eleventh centuries. They were located in the northwestern corner of the peninsula, which allowed them to expand westward and eventually take over empires between the Mediterranean and the Black Seas. The sultan was the supreme authority in both a political and a military sense. Administrative and military power were centralized under the bey, who was only a tribal leader, tribal law was before Muslim law. The Ottoman authorities were Sunni Muslims. The sultan assigned duties to a supreme religious authority, who then maintained a system of schools to educate Muslims. There were some who believed in Sufism or other doctrines, but the government allowed it as long as they were still loyal to the empire. Non-Muslims had to pay a head tax since they were exempt from military service. The Ottoman Empire was divided into four main occupational groups: peasants, artisans, merchants, and pastoral people. Shah Ismail founded the Safavid Dynasty. The Safavids was a mixed society like the Ottoman Empire; majority of the population were Iranian. They used the Shi’ite faith, and Shi’ism was declared the state religion. Like the Ottoman’s sultan, the Safavids had their shahs who would check up on their people. This empire was not as wealthy as the Ottomans and the Mughals. Their greatest area of productivity was in textiles. The founder of the Mughal Dynasty is known as Babur. Ruling of the dynasty was passed down from Babur to his son, Humayun, and then to his grandson, Akbar. As emperor, Akbar didn’t just focus on the views of Muslim but also gave Christian views a chance. He later formed a new type of worship called the Divine Faith, which combined characteristics of different religions. He believed in having a harmonious society, which meant each individual and group would play their assigned role and contribute their part to society. This dynasty was the last of the great traditional Indian dynasties. All three of the empires were Muslim, and they all displayed an impressive capacity to create and run a large empire. The Muslim World was protected by the military and political abilities of these empires. Unlike their European counterparts, these empires continued to thrive.

James Joyces Araby - Analysis of Araby :: Joyce Dubliners Araby Essays

James Joyce's Araby      Ã‚  Ã‚  Ã‚  Ã‚   In James Joyce's short story "Araby," several different micro-cosms are evident. The story demonstrates adolescence, maturity, and public life in Dublin at that time. As the reader, you learn how this city has grown to destroy this young boy's life and hopes, and create the person that he is as a narrator.   Ã‚  Ã‚  Ã‚  Ã‚   In "Araby," the "mature narrator and not the naive boy is the story's protagonist."(Coulthard) Throughout the story this is easily shown, especially when it refers to "the hour when the Christian Brothers' school set the boys free."(Joyce 2112) Although they were freed, they were placed into an "equally grim world, where not even play brought pleasure."(Coulthard) Joyce demonstrates this culture by showing a boy's love for a girl throughout the story. This young boy, is completely mystified by this girl, but at the end, the girl is replaced by the girl with an "English accent" attending the booth at the bazaar. This shows the power and persuasiveness that England has at that time over Dublin.      Ã‚  Ã‚  Ã‚  Ã‚   The antagonist in this story, which can easily be determined is the culture and life in Dublin. This has a great effect on the boy and the rest of the people from this city. Dublin is referred to as the "center of paralyses,"(Internet) and "indeed sterile."(Joyce) This plays a huge role in the forming of this boy's life, where there is no fun. "Araby" is a story "of a soul-shriveling Irish asceticism, which renders hopes and dreams not only foolish, but sinful."(Coulthard) In the story, the only thing that the young boy has to look forward to is buying something for the girl he loves, and in the end he can't even do that; and by making the final characters English, the story leaves an impact on the reader about the Dublin society. It shows the antagonist of the story to be "a repressive Dublin culture."(Coulthard)      Ã‚  Ã‚  Ã‚  Ã‚   Through this allegorical piece, the reader can understand the harsh life that people are forced to deal with in Dublin society. "The narrator has become embittered rather than wiser, which was his destiny from the first for desiring

A Guide to Critical and Creative

Similar illness in one community suggests that there must be a connection between the environment and the illnesses. Acting on that hunch, I would conduct interviews with the families and people that are affected. All ideas and procedures in this easy can be found in chapter 10. (Ruggiero, 2012). I would ask them when did the symptoms start and what their official diagnosis, if any, has their doctor gave them. The assumptions that the land itself has to be the source of the contamination could hinder the investigation. To critically think about the issue I will have to brainstorm some questions to be answered.What company or companies built the houses? Who was in charge of overseeing the building codes? What companies were the building materials bought from? Is this company following all rules of the EPA? What industries are close by? What do they produce and what is their environmental impact? At this time, I cannot assume that everyone will be open for interviews or share my passio n for investigating the issue. I will keep in mind that some of the information will be hear-say or secondhand information that may not be accurate.This type of information may lead to more interviews to check the source of the information. I would do research at the library to check maps of the area before it was developed. The court house would have information about the land to look into also. Close by communities that have been developed years earlier may hold clues. I would ask around in those communities for a few leads on whom I may interview there. The symptoms and diagnosis of the people involved was the first clue as to what is the common denominator of this issue. Investigating the land before it was developed may lead to answers.This was the first assumption or hunch. The answers received from this part of the investigation may not match up to the symptoms that could arise from the state of the land before it was developed. The next investigation would involve the materi als that the homes are built out of. Even if the same contractor did not build all the houses, I must find out if the contractors may have used a common supplier. All through the investigation, the symptoms and illness must match the possible causes. To critically think about the issue, all possibilities must be considered.It could be that two materials that by themselves are harmless, were used together to create a harmful environment. It is possible that the contractors may not want to speak about their practices concerning the development of this community. This would be the time to look for ex-employees to interview. I may face criticism for my efforts to find the cause of the illnesses. The criticism may be very helpful to my investigation. No matter how much I think I am correct or perfect, there is always room for more information and improvement.I must take into consideration how my ideas match up with the information collected with both positive and negative feedback. Tryin g to save face and convincing people that my ideas are correct are not important. My curiosity will lead me to ask questions that lead to answers that lead to more questions. I will fight the erg to become trapped by my previous miscalculations. The facts in the case and the process of elimination will help lead the way. I must stay open to the possibilities that a previous eliminated cause or idea may still have a role to play in solving the problem.Similar illness in one community suggests that there must be a connection between the environment and the illnesses. Acting on that hunch, I would conduct interviews with the families and people that are affected. All ideas and procedures in this easy can be found in chapter 10. (Ruggiero, 2012). I would ask them when did the symptoms start and what their official diagnosis, if any, has their doctor gave them. The assumptions that the land itself has to be the source of the contamination could hinder the investigation. To critically thi nk about the issue I will have to brainstorm some questions to be answered.What company or companies built the houses? Who was in charge of overseeing the building codes? What companies were the building materials bought from? Is this company following all rules of the EPA? What industries are close by? What do they produce and what is their environmental impact? At this time, I cannot assume that everyone will be open for interviews or share my passion for investigating the issue. I will keep in mind that some of the information will be hear-say or secondhand information that may not be accurate.This type of information may lead to more interviews to check the source of the information. I would do research at the library to check maps of the area before it was developed. The court house would have information about the land to look into also. Close by communities that have been developed years earlier may hold clues. I would ask around in those communities for a few leads on whom I may interview there. The symptoms and diagnosis of the people involved was the first clue as to what is the common denominator of this issue. Investigating the land before it was developed may lead to answers.This was the first assumption or hunch. The answers received from this part of the investigation may not match up to the symptoms that could arise from the state of the land before it was developed. The next investigation would involve the materials that the homes are built out of. Even if the same contractor did not build all the houses, I must find out if the contractors may have used a common supplier. All through the investigation, the symptoms and illness must match the possible causes. To critically think about the issue, all possibilities must be considered.It could be that two materials that by themselves are harmless, were used together to create a harmful environment. It is possible that the contractors may not want to speak about their practices concerning the devel opment of this community. This would be the time to look for ex-employees to interview. I may face criticism for my efforts to find the cause of the illnesses. The criticism may be very helpful to my investigation. No matter how much I think I am correct or perfect, there is always room for more information and improvement.I must take into consideration how my ideas match up with the information collected with both positive and negative feedback. Trying to save face and convincing people that my ideas are correct are not important. My curiosity will lead me to ask questions that lead to answers that lead to more questions. I will fight the erg to become trapped by my previous miscalculations. The facts in the case and the process of elimination will help lead the way. I must stay open to the possibilities that a previous eliminated cause or idea may still have a role to play in solving the problem.

Bharati Vidyapeeth s College Of Engineering For Women Essay

Amphibian Robot Prof.M.S.kasar Department of Electronics Telecommunication Bharati Vidyapeeth’s College Of Engineering For Women Pune, India Shilpa L.dhebe,Sheetal T.jambhulkar,Anjali A.dhavan Department of Electronics Telecommunication Bharati Vidyapeeth’s College Of Engineering For Women Pune, India Abstract—Now a days Water gets polluted due to increment of marshy field. This project helps to perform variety of tasks, which can be perform on land as well as on water surface. It will be very useful for military applications. It is an vehicle which can travel on different kind of surfaces like flat or rocky land terrains water. It performs crawling on land surface and performs swimming on water surfaces. Keywords—amphibious robot; swimming; style; crawling; marshy field Introduction There has been significant interest in development of robots capable of autonomous amphibious operations within turbulent ocean surf zones. Robot is a machine that can be controlled by computer which is designed to move, manipulate object and accomplish work while interacting with environment. Robots have been widely used to perform number of tasks which reduces the manual work specifically in remote areas where human accessibility is unimaginable. The main applications where the robots have exhibited their excellence include surveillance, tracking target for military purposes and also for disaster management like searching rescuing victims. This system deals about evolutionary