Who Invented Ethernet

â€Å"I came to work one day at MIT and the computer had been stolen so I called DEC to break the news to them that this $30,000 computer that theyd lent me was gone. They thought this was the greatest thing that ever happened because it turns out I had in my possession the first computer small enough to be stolen!†Ã‚  (Robert Metcalfe) The Ethernet is a system for connecting computers within a building using hardware running from machine to machine. It differs from the Internet, which connects remotely located computers. Ethernet uses some software borrowed from Internet protocol, but the connecting hardware was the basis of a patent involving newly designed chips and wiring. The patent describes Ethernet as a multipoint data communication system with collision detection. Robert Metcalfe and Ethernet   Robert Metcalfe was a member of the research staff at Xerox at their Palo Alto Ranch Center, where some of the first personal computers were made. Metcalfe was asked to build a networking system for PARCs computers. Xeroxs wanted this set up because they were also building the worlds first laser printer and they wanted all PARCs computers to be able to work with this printer. Metcalfe met with two challenges. The network had to be fast enough to drive the very fast new laser printer. It also had to connect hundreds of computers within the same building. This had never been an issue before. Most companies had one, two or maybe three computers in operation at any one of their premises. Metcalfe remembered hearing about a network called ALOHA that was used at the University of Hawaii. It relied on radio waves in lieu of telephone wire to send and receive data. This led to his idea to use coaxial cables rather than radio waves to limit interference in transmissions.   The press has often stated that Ethernet was invented on May 22, 1973 when Metcalfe wrote a memo to his bosses touting  its potential. But Metcalfe claims Ethernet was actually invented very gradually over a period of several years. As part of this lengthy process, Metcalfe and his assistant David Boggs published a paper titled, Ethernet: Distributed Packet-Switching for Local Computer Networks  in 1976.   The Ethernet patent is U.S. patent #4,063,220, awarded in 1975. Metcalfe completed creation of an open Ethernet standard in 1980, which became an IEEE industry standard by 1985. Today, Ethernet is considered the genius invention that means we no longer have to dial up to access the Internet. Robert Metcalfe Today   Robert Metcalfe left Xerox in 1979 to promote the use of personal computers and local area networks. He successfully convinced the Digital Equipment, Intel and Xerox corporations to work together to promote Ethernet as a standard. He succeeded as Ethernet is now the most widely-installed LAN protocol and an international computer industry standard.   Metcalfe founded 3Com in 1979. He accepted a position as Professor of Innovation and Murchison Fellow of Free Enterprise at the University of Texas Cockrell School of Engineering in 2010.

The Impact Of Technology On Managerial Accounting Essay

Introduction Technological advances have dramatically changed many aspects within organizations and influenced how they operate today. In particular, technology has modernized accounting information in the way that it stored, shared and transmitted. Technological advances have changed practices for management accountants, who provide financial statements for external users such as investors and government agencies and accounting information to internal users which primarily are managers within the organization. Most importantly for businesses, managers have also been influenced by technology in the way they retrieve and evaluate accounting data to make decisions, plan and control the business. Technology provides a multitude of advantages to organizations; however, some would argue the advantages comes with disadvantages. 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Nuclear Energy Failed Source of Energy free essay sample

This paper explains how the United States nuclear power program failed. This paper explains the reasons behind the halt in nuclear power plant construction in the United States. Factors in the decline of nuclear power plants include raising costs, disposal of nuclear waste, concern for safety, declining public opinion and governmental programs and decisions not favorable to the nuclear power industry. Footnotes. After a period of rapid growth in the nuclear power industry, resulting in over a hundred nuclear power plants being constructed in the United States alone, in the early 1970s the industry began to slow and even began to decline in the 1980s, while the rest of the world continued to increase their nuclear industry capacity. In the mid-1970s the Atomic Energy Commission predicated that by the year 2000 there would be more than 1,000 nuclear power plants in the United States.[1] No new nuclear power plants have been ordered in the United States since 1973 and several plants have gone off-line since. We will write a custom essay sample on Nuclear Energy: Failed Source of Energy or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page [2] Between 1990 and 1995, 20 additional nuclear power plants came online outside of the United States, with an additional 36 under construction. Furthermore, Robert Newman, the President of ABB Combustion Engineering Nuclear Systems, in a October 6, 1996 New York Times article suggested that his company had been approached by the government of China with a plan to build as many as 150 nuclear power plants over the next 40 years.[3] Currently, there are over 437 nuclear power plants operating around the world.[4] Hence, while the rest of the world is increasing their dependence on nuclear power, the question becomes, why is the Untied States making a rapid reversal in its dependence on nuclear power? Several tangible factors have been suggested: the rising costs of construction of a nuclear power plant, the increase in time that it takes to construct a nuclear power plant, the disposal of low grade and high grade nuclear waste, public safety of living near a nuclear power plant, declining public support for nuclear power, and the fear of nuclear power plants contributing to the proliferation of nuclear weapons around the world.

Defining Behavior free essay sample

The purpose of this assignment is to demonstrate understanding and application of basic concepts of behavior analysis. Specifically you are required to develop objective, behavioral definitions of social skills behavior avoiding subjective, mentalist terms, and hypothetical constructs. General Information In a short answer format, you should choose any 3 of the 10 social skill behaviors for which you will provide several points of knowledge, as well as produce a well written behavioral objective.The ten social skill behaviors are: Greeting, Playing, Following Directions, Engaging in Eye Contact, Initiating a Conversation, Participating in a Conversation, Asking Questions, Sharing, Cooperating with Others, and Requesting. An example of the expected product for a term is provided below. Example of expected product: Identified behavior: Playing with a pet. Operational / definition: Playing with a pet Includes softly patting (softly Is defined as without force) the dogs back, head or stomach.All assignments must be submitted through this link assignments may not be submitted via email. We will write a custom essay sample on Defining Behavior or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Grading Procedures The Defining Behavior assignment is worth 15 points total. Choose any 3 of the terms, with each term worth 5 points. Each social skills behavior will be graded according the criteria listed in the Scoring Grid below. Note: You must Indicate the graded. Scoring Grid Defining Behavior Assignment Please note: Do NOT include the Scoring Grid with your document. Choose any 3 of the following:Expected Content Points Earned Possible Points Greeting behavior How would you operationally define the behavior? How would you measure this behavior? Cite from your textbook. Produce a behavioral objective including conditions/context, criteria, target behavior and learner. 5 Playing behavior objective including conditions/context, criteria, target behavior, and learner.