Myriad Details of Black Holes :: physics science space

Introduction Definition: Black holes are rapidly spinning stellar bodies of incredible mass. A typical black hole has a mass many times that of our own sun , but the size approaches point density. For all intents and purposes, black holes are singularities, a fact that many physicists find contradictory, since in general the universe abhors a singularity. They are formed when a large sun exhausts its fuel and collapses to a very small volume. Of course, conservation of angular momentum and mass hold true, so as the star shrinks, it rotates faster and faster, and its density becomes greater and greater. Eventually, the star becomes so dense that space-time curves so much in its vicinity that not even light can escape. For more on space-time, click on curved space time at the bottom of the page. Black holes are fascinating phenomena. Only recently have physicists begun to even find proof of their existence, and yet their unique physical properties have extraordinary and galaxies-wide effects. The physics to truly understand the underpinnings of black holes have only been around since 1915 when Einstein conceived and presented his General Theory of Relativity, in which gravity is considered in terms of curved space-time. However, in Exposition of the System of the World, written over a hundred years earlier in 1798, Laplace predicted that masses of sufficient size would have a gravitational attraction so large that light itself could not escape. Stephen Hawking, the author of A Brief History of Time-- perhaps the most successful cogent popular science book ever written-- and an extraordinary physicist, wrote one of the definitive papers on the physics behind black holes. (and then interestingly enough, recanted his once firm belief that black holes even existed--at which time he married his nurse. Physicists are eccentrics in a long and noble tradition. Black Holes Collide "In a looming collision of giants, two super massive black holes are drifting towards a violent merger and an eruption of energy that will warp the fabric of space" Sound like science fiction? It isn't. The words above were written in an article entitled "Telescope Sees Black Holes Merging", by Paul Recer, writer for the online Yahoo Science AP. The article was posted November 19. 2002. The Harvard-sponsored Chandra Observatory has captured for the first time two black holes in orbit around each other in the extraordinarily bright galaxy NGC6240, a mere 400 million light years away. This is no stable orbit.

Computerized System Essay

7.1 Architectural Design 7.1.1 Entity-Relationship Diagram Fig. 7.1.1 Database model On the figure above, the table â€Å"item_description† contains information about the items in the inventory. This is where the data for new items will be stored and updating of information of existing items takes place. Notice that, the table â€Å"critical_items† has only two attribute which is â€Å"status† that identifies the critical item if it is low or not. The â€Å"transaction† table is where the system stores data regarding individual transaction while â€Å"item_trans† table focuses on list of items and its total price. 7.2 System Function 7.2.1 Physical Data Flow Diagram Fig. 7.2.1 Physical DFD The system mainly consists of functions for sales and inventory management. A customer orders an item and the system checks the inventory by accessing the master item table. New items can be added by the management and the master item record is updated as such. A process computes the total price for the items ordered by using the input from the customer and data(prices) from the inventory master table. After the transaction, receipt will be given to the customer and both the inventory record and sales record are updated. If the system detects any item to be at critical level, a notification will be sent to the management. 7.2.2 User Interface Fig. 7.2.2.1 Main Menu This is the interface where the user has access to all function of the system (Fig. 7.2.2.1). The first thing that will show up when the user runs the system is the button with a text of â€Å"V†. When the user clicks the â€Å"V† button the five buttons and upon clicking the inventory and report button their sub items will also appear and when the user clicks one of these buttons (Point of Sale, View Inventory, Update Inventory, Add Inventory, Critical Items, View Sales Report, and View Inventory report) the visibility of all buttons will be disabled and then the desired form of the user will appear on the gray space. The sub buttons of Inventory is where the user viewing of inventory and critical items ( if there’s any ), update, and adding of inventory. The sub buttons of reports is where the user views the sales and inventory report of the system, the help button mainly focuses on how to use it or what we call â€Å"user manual† and about the system. Fig. 7.2.2.2 Point of Sale Lastly, this form is where the transaction between the manager and the customer takes place. First thing that the user will do is choose an item code and then the quantity for the item and it will automatically compute for the price after that, he will have to click the add item button then the item will appear on the white space on the right side and then a message will prompt if he want to add another or not if he doesn’t want to add another item the uwser will require to input the customer’s payment and clicking the complete transaction button will prompt another message if the user is sure about the transaction. And then if the user is sure, the system will prompt another message if he want to print the receipt or not.

American Freedom and Its Relationship to Government Authority

Slavery Freedom Considering economic policies and the balance of power between national and local government, how did Whigs and Democrats differ in their definitions of American freedom and its relationship to government authority? The Whigs were of the belief that there should be some kind of strong central government. That is involved in a number of activities to include: the building of roads, maintaining of harbors and canals. This was designed to improve commerce among the states and it would streamline the power of the federal government. At the same time, they were focused on having different morals projected to everyone including: temperance and Sabbatarianism. These areas showing how the Whigs definition of freedom is based upon: a strong central government who can protect and enhance it. This meant that the power of the federal government increased in order to achieve these objectives. (The Second Party System, 2011) (Ragone, 2012) A good example of this can be seen with the Bank of the Un ited States. This was established in 1791 by a pro federalist Congress. The basic idea is that trade had been limited between the states because of the lack of standards and coordination. The bank had the authority to print and control money (which improved commerce). This institution is one of the many ideas that Whigs had about the power of the federal government and its ability to deal with a host of challenges. As a result, their definition of freedom is based upon aShow MoreRelatedThe Age Of Enlightenment And The Scientific Revolution1675 Words   |  7 Pagesrevolution and the scientific revolution represented a giant leap forward in human development, the Age of Enlightenment delivered the greatest influence for the future American society and planted the way for cultural and humanistic enrichment. 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These novels explore individual’s struggles for identity under a tightly managed government by looking at character attempts to be different, and how governments take action to resolve rebellionRead MoreThe American Financial Industry1672 Words   |à ‚  7 PagesThe American financial industry is a very active industry in the world. Although the history for American financial industry is shorter than other old capitalist counties, such as English, France , Netherland, due to the industry ‘s potentiality, creativity and successful supervision comes from government ,the American financial industry has been growing fast since it was established hundreds year ago. Overall ,at present ,from the aspects of industry scale and structure ,monetary policy and theRead MoreJohn Locke versus Thomas Hobbes Essay1297 Words   |  6 Pages1640 and 1690. 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Women, Slaves, and minorities did not get equality from the American Revolution. Women, and slaves

Ulysses S. Grant Essay - 1110 Words

Ulysses S. Grant Ulysses S. Grant was an American general and 18th president of the United States. Grant was born in Point Pleasant, Ohio, on April 27, 1822, the son of Hannah Simpson and Jesse Grant, the owner of a tannery. Taken to nearby Georgetown at the age of one, he was educated in local and boarding schools. In 1839, under the name of Ulysses Simpson instead of his original Hiram Ulysses, he was appointed to West Point. Graduating 21st in a class of 39 in 1843, he was assigned to Jefferson Barracks, Missouri. There he met Julia Dent, a local planters daughter, whom he married after the Mexican War. During the Mexican War, Grant served under both General Zachary Taylor and General Winfield Scott and distinguished himself,†¦show more content†¦Sherman to move into Georgia, and General Franz Sigel to clear the Shenandoah Valley of Virginia. Despite the failure of Butler and Sigel and heavy losses at the Wilderness, Spotsylvania, and Cold Harbor, Grant continued to press the drive against General Robert E. Lees army. After Shermans success in Georgia and the conquest of the Shenandoah Valley by General Philip H. Sheridan, Grant forced Lee to abandon Petersburg and Richmond and to surrender at Appomattox Court House on April 9. As commander of the army, Grant soon became trapped in the struggles between President Andrew Johnson and Congress. Because of the presidents clear Pro-Southern tendencies, the general gradually moved closer to the radicals and cooperated with Secretary of War Edwin M. Stanton in carrying out the congressional Reconstruction plan for the South. Grant accepted appointment as secretary ad interim after Johnsons dismissal of Stanton, but clashed violently with the president when the Senate ordered Stanton reinstated. Then, as the countrys best-known military leader, he became the Republican candidate for president in 1868 and defeated his Democratic rival, Horatio Seymour. Grants military experience ill prepared him for his new duties. Faced with major problems of Reconstruction, civil service reform, and economic adjustment, he did not know how to choose proper advisers or to avoid the pitfalls of an age of corruption. Encouraged by the final restoration of allShow MoreRelated Ulysses S. Grant Essay948 Words   |  4 Pages Ulysses S. Grant lived an interesting life. He gave so much to this country. His life was exciting and he lived in many different places, from small houses to a house given by people to the white house. From saving the blacks from more slavery to giving the U.S. bad years from presidency. nbsp;nbsp;nbsp;nbsp;nbsp;Ulysses S. Grant was an American general and the 18th president of the U.S. (Williams 53).Grant was born in point pleasant, Ohio, on April 27 ,1822, the son os Hannah SimpsonRead More Ulysses S. Grant Essay1565 Words   |  7 Pages Ulysses S. Grant   Ã‚  Ã‚  Ã‚  Ã‚  On April 27, 1822 a boy was born to Jesse Root Grant and Hannah Simpson Grant in the small town of Point Pleasant, Ohio. They named their son Hiram Ulysses Grant. In 1823 the family moved to a town nearby called Georgetown, Ohio, where Ulysses’ father owned a tannery and some farmland. Grant had two brothers and three sisters born in Georgetown.   Ã‚  Ã‚  Ã‚  Ã‚  Ulysses attended school in Georgetown until he was 14. He then spent one year at the academy in Maysville, KentuckyRead More Ulysses S Grant Essay1572 Words   |  7 PagesUlysses S Grant Although Ulysses S. Grants contemporaries placed him in the highest position of great Americans along with George Washington and Abraham Lincoln, the twentieth century has seen him fade. 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Grant, the eighteenth president of the United States, was a man of many notions. Grant endured a long journey from horseman to general. This journey continued all the way to President of the Unites States. From being born in a small white cottage, all the way to piecing together the Union, Grant has done it all. In the sixty-three years that Grant was alive, he made many positive impacts and shaped our country for the better. Born Ulysses Hiram Grant, on April 27Read MoreEssay about Ulysses S. Grant1140 Words   |  5 PagesUlysses S. Grant General Ulysses S. Grants brilliant siege of Vicksburg had a significant impact on the surrender of the Confederacy. This Vicksburg campaign was significant due to the fact that it basically gave the Union total control of the Mississippi River. This meant the isolation of the West and basically a clear waterway for supplies to reach the Deep South. Once this waterway was open arms, food, and soldiers could be provided for the Union soldiers in the South and open a devastatingRead MoreUlysses S. Grant: A Brief Biography692 Words   |  3 PagesUlysses S. Grant was a valiant and reliable person in the civil war. Born on April 27th, 1822, in Pleasant Point, Ohio, he moved to Georgetown, Ohio when he was 2 years old. He worked at his father’s farm until he grew up and his father forced him to attend West Point University. Grant did not like it there. Though his teachers said he was good at horse-riding, he failed in many subjects, including Math, Reading, and English. His cl assmates ridiculed him for his birth-name â€Å"Hiram†, which he laterRead More Ulysses S. Grant and the Trials of Leadership Essay3355 Words   |  14 PagesUlysses S. Grant and the Trials of Leadership On June 3, 1864, the Union and Confederate armies met on a battlefield in Cold Harbor, Virginia. The Confederates were well entrenched and prepared to mount a defensive stand. The Union soldiers on the other side of the lines were preparing for an attack that would prove to be disastrous. They knew what the outcome would be. In only 20 minutes of fighting, 7,000 Union soldiers were killed or wounded. As the Yankees prepared to go into action, manyRead MoreThe American Civil War : Ulysses S. Grant3206 Words   |  13 Pages Ulysses S. Grant was a quiet and reserved man however he was able to inspire a sense of bravery among his soldiers who fought on American battlefields (â€Å"American President†). He once said â€Å"In every battle there comes a time when both sides consider themselves beaten, then he who continues the attack wins (â€Å"Ulysses S. Grant Quotes† brainyquote). The man we know as Grant was an honorable man who entrusted others and did not see dishonor in them. This man lead the country through troubled timesRead MoreUlysses S. Grant and His Contribution to America Essay example1590 Words   |  7 Pagesis what General Ulysses S. Grant as the highest ranking officer of the Union Army, wrote to the opposing the highest ranking officer of the opposing Confederate army, General Robert E. Lee on April 7, 1865. (Alter, 2002) In 1861, the Southern states of the United States of America had seceded from the Union, forming the Confederate States of America, and President Linc oln deciding it was worth it to bring them back, declared war, sparking the American Civil War. (Gaines, 2009) Grant joined the army

Cultural Awareness Project Ethnocentrism - 1723 Words

Hi this is Brittney Del Pizzo and today for my cultural awareness project I will be discussing ethnocentrism in the imaging department. My objectives for the presentation is to explain how you can avoid ethnocentrism in the imaging department and to also explain how ethnocentrism can lead to stereotyping and how this can further have a negative impact on the department. I want to begin by discussing some general definitions so that you have a better understand of the topics that I am going to discuss. I think it is important to begin by defining the definition of culture. As we learned in class culture is a unique combination of rituals, religious beliefs, ways of thinking and ways of behaving that unify a group of people. Further†¦show more content†¦Some ways to become culturally aware include first becoming aware of different cultures that surround us. When we become aware we also have to take the time to evaluate our own prejudices. Secondly, we cannot allow cultural diversity to lead us to criticize or even draw judgments of others. Thirdly, we have to build friendships with individuals of different cultures. By building friendships it allows us to respect others while also learning about their culture. Fourth, we need to show understanding of individuals that are of different cultures. When we develop understanding of different cultur es it also let’s them know that we truly care. Fifth, we need to listen to individuals of different cultures. As health care professionals this is probably the most important to us. Sometimes it may be difficult to understand or even relate to individuals of different cultures, so we need to take the time to ask questions so that we can better treat them. Lastly, we need to learn about different cultures. We can never learn too much about another culture, and it will only help us become more culturally aware. Now that we know what it means to be culturally aware and how you can develop cultural awareness I want to show you how this can relate to the health care profession, specifically the imaging department. I want to give you specific examples that I have seen within the

The Influence of Ganster Films such as New Jack City and Menace to Society Free Essays

Warshow began the essay saying â€Å"America is committed to a cheerful view of life†. Warshow is referring particularly to the movies but also to comic books and pulp fiction . Those that perpetuate the notion of what constitutes the gangster himself but also his environment, motivation and modus operandi. We will write a custom essay sample on The Influence of Ganster Films such as New Jack City and Menace to Society or any similar topic only for you Order Now The intolerable dilemma is that failure is a kind of death and success is evil and dangerous, are ultimately impossible. The effect of the gangster film is to embody this dilemma in the person of the gangster and resolve it by â€Å"his death, not ours, we are safe for the moment and can acquiesce in our failure, we can choose to fail. This essay makes me think that most gangster movies can help and also hurt the viewer. It all depends on the state of mind of the individual. Watching movie such as â€Å"New Jack City† and â€Å"Menace to Society† made people in my community act out, not in a fearful way but in a more gangster way. More crimes took place after young viewers watched these types of films; maybe in the suburbs people felt safe but not in our neighborhood. Movies such as these were made to show people the rise and fall of a gangster. However it depends on the individual that watches these types of films and what they gather from it. Take for instance, if a person has never been to the projects and had seen this type of activity take place; they may watch one of these films and not get Influenced by it . On the other hand, people who live in the projects that see drug dealers and so called gangsters, begin to glorify this kind of lifestyle because this is what they see on a day to day basis. Warshows’ intolerable dilemmas sometimes resolve in our death. Some people can see a film and know in the end that the gangster will end up dead or on a bus to prison but for some reason that never scares them from trying to get the same fame that the gangster has in the film. Take for example, the film â€Å"New Jack City â€Å"staring Wesley Snipes as the notorious Neno Brown; it shows two sides of a gangster. Neno kills people over drugs and territory but the film also shows him feeding the poor on Thanksgiving and handing money out to children and preachers. Neno starts out as an average street hustler with dreams of one day being a drug kingpin. His dream seems to be reachable when his brother introduces him to the new drug crack cocaine. Neno then builds a street team to help run his empire. He operates his crack business the same as any other business like Wal-Mart. In a way Neno was like a ghetto Robinhood. He robs the rich and sells dope to the poor. This is what makes this essay one sided. People living in the ghetto are simply products of their environment. They are simply forced into this life that is fictional to others. A gangster’s motivation is always something he feels like he has first and before anyone else. It may be a new car, jewelry or a luxury home. Most movies about a fictional gangster are always stemmed from a real person that has already failed as a gangster, either dead or in prison. Most of the gangster movies we watch today are real life stories. Filmmakers just put a twist on the story and change the names around. People from the lower class watch these movies and often blur out the bad ending rather than being in fear of the same ending happening to them. Most gangster movies have a hero from both sides. The lower class people root for the villain while the middle and upper class root for the main detective that usually brings the gangster to his untimely demise. Most kids are fascinated with gangsters because of their lavish and glorious lifestyle that are portrayed by he media. Lower class children do not live next door to doctors or lawyers so they do not glorify their lifestyles . They can just turn on the television and see a gangster anytime they want and to some, glorifying a gangster is real and gives them something to believe in. When they see a gangster in the neighborhood, everyone is nice to him out of fear not respect but as a child, he will grow up thinking that type of lifestyle is o. k. because everyone will be too scared to tell him that this individual is scum and that he does not want to be like him when he grows up. How to cite The Influence of Ganster Films such as New Jack City and Menace to Society, Papers

Comparing Works of Art free essay sample

Art, science and literature all grew tremendously during the Renaissance, led by artists like Michelangelo and Leonardo da Vinci, scientists like Galileo, and writers like Shakespeare. In art, the Renaissance renewed interest in naturalistic styles and formal rules of composition such as perspective. The Greek classical ideals of ideal proportions (for depicting the human body as well as for architecture and painting) also regained popularity. Important artists of the Italian Renaissance were with Michelangelo and Leonardo da Vinci. Comparing Works of Art 4 Art Terms of the Renaissance alabaster – A fine-grained, slightly translucent stone with a smooth milk-white surface. buon fresco – Sometimes called â€Å"true Fresco. † a technique in which pigment suspended in water is applied to wet plaster, A very durable method. chiaroscuro refers to the fine art painting modeling effect of a strong contrast between light and dark to give the illusion of depth or three-dimensionality. Italian word (chiaro0 and dark (scuro), this technique was widely used in the Baroque period contrapposto – The principle of weight shift in the visual arts. t’s commonly used to depict a figure in a relaxed stance, one leg weight – bearing, the other bent, the torso slightly shifted off its axis. fresco painted on plaster. There are two methods, buon fresco and fresco secco. fresco secco – this technique has pigments mixed with a binding agent and painted on dry plaster, and not as durable as a true fresco painted. humanism – it is the movement of the 14th -16th centuries when all the branches of learning, literary, scientific and intellectual were based on the culture and literature of classical Greco-Roman antiquity. risaille – A style of monochromatic painting in the shades of gray, used especially for the representation of relief sculpture. illusionism – painting which makes two-dimensional objects appear to be three-dimensional. Mannerism – features the use of distorted figures in complex, impossible poses, and strange artificial colors. perspective – refers to the technique of representing the illusion of a three-dimensional world on a two-dimensional surface ( a flat piece of paper or canvas). Renaissance Man – A man who has broad intellectual interest and is accomplished in the areas of the arts and sciences. A â€Å"universal man† or polymath. trompe l’oeil – A French term meaning, â€Å"trick of the eye. † Also known as illusionism. A painting style designed to give the appearance of three-dimensionality. polymath- a person who excels in multiple fields, particularly in both arts and sciences. Another name for â€Å"Renaissance Man†. sfumato – this term was coined by the Italian Renaissance artist, Leonardo di Vinci, and refers to a fine art painting technique of blurring and sifting of sharp outlines by subtle and gradual blending of one tone into another through the use of thin glazes to give the illusion of depth or three-dimensionality. This stems from the Italian word square meaning to evaporate or to fade out. The Latin origin is fumier, to smoke. The opposite of sfumato is chiaroscuro. terribilita – A term applied to the art of Michelangelo describing the heroric and aw-inspiring power and grandeur of his work. Comparing Works of Art 5 Leonardo di Vinci Leonardo di Vinci was born on April 15, 1452, in the small Tuscan town of Vinci, near Florence. Born of wealth of a Florentine and a peasant woman he and his family settled in Florence. He rapidly advanced socially and intellectually. In 1466 he was appointed as a garzone ( studio boy ) to Andrea del Verrochino, the Leading Florentine painting and sculpture of the day. Leonardo’s stylistic innovations are even more apparent in The Last Supper, in which he re-created a traditional theme in an entirely new way. Instead of showing the 12 Apostle as individual figures, grouped in dynamic compositional unit of three, framing the figure of Christ, represents a calm nucleus while the others respond with animated gestures. The Mona Lisa, His most famous work is well known for its mastery of technical innovations as for the mysterious of its legendary smiling subject. This work is consummate example of two techniques- sfumato and chiaroscuro- of which di Vinci was one of the first great masters. Sfumato is characterized by the subtle almost infinitestimal transitions between color areas, creating a delicately atmospheric haze or smoky effect. Chiaroscuro is the technique of modeling and defining forms through contrasts of light and shadow: the sensitive hands of the sitter are portrayed with a luminous modulation of light and shade, while color contrast is used only sparingly. Comparing Works of Art 6 Michelangelo Buonarroti, (1475-1564) Michelangelo was born in Caprese near Florence, Italy in 1475 during a time known as the Renaissance. He was a master of sculpture, architecture, painting and poetry. When he was young, he studied Latin Greek,. then he discovered how much he loved to draw. He worked as an apprentice under a well-known painter Domenico Ghirlandaio for 3 years to learn the art of painting. He was most interested in learning how to show physical strength and energy in humans. He also learned about frescoes. Fresco in Italian means â€Å"fresh†. This is a technique for painting murals. The artist paints on wet plaster. As the plaster dries, the painting becomes part of the wall and lasts a very long time. Fresco painting usually takes several painters working together because the work needs to be done quickly before the plaster dries. When Michelangelo was young in Florence, there was much building and growth in the city. He learned a lot about art and architecture from watching churches being built and by seeing sculptures and frescoes that were created for churches. After Michelangelo worked with the painter Ghirlandaio, he had a chance to work with Bertoldo di Giovannia who was a famous sculptor. During this time he learned about creating beautiful statues from marble. The first statue he created (when he was 24) was called the Pieta. It was so beautiful and is the first work that Michelangelo was famous for. Michelangelo was unmatched and the creator of sublime beauty that expresses the breadth of the human condition yet, in a world where art had flourished only with patronage, he was caught between the conflicted powers and whims of the medical family in Florence and the papacy in Rome. Another famous statue that Michelangelo created from marble was the famous statue of David which can be seen in Florence. It is over 13 feet high and weighs more than 5 metric tons or 11,000 pounds. Because his work was so famous, Michelangelo was asked by Pope Julius II who was a powerful ruler of the church in Rome, to paint the large ceiling of the Sistine Chapel. Michelangelo was disappointed because he told the pope he was not a painter, that he was a sculptor.