Computers In Our Society
.... it maybe you have been using them for a long time. Don’t think they are a big part of your life? Without even realizing it computers have worked their way into just about every aspect of our everyday lives. From waking in the morning, to the food at the dinner table, to the movie afterwards, computers have influenced the way we live and will continue to do so for the foreseeable future.
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Cryptography
.... To decrypt the message, the receivers would simply subtract 3 letters from each letter. This algorithm was later improved and called ROT13, where the letters could be shifted to any number between 1 and 25, and the number of letters shifted was the secret key. This very simple algorithm has been used on Usenet successfully to prevent people from inadvertently reading materials they might find offensive.
Monoalphabetic substitution is another simple step away from the ROT13 algorithm. In this algorith .....
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A Short History On Computers
.... by steam power, and require only one person there.
Babbage's computers were never finished. After Babbage, there was a temporary loss of interest in automatic digital computers.
A strong need thus developed for a machine that could rapidly perform many repetitive calculations.
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Use of Punched Cards by Hollerith
A step towards automated computing was the development of punched cards, which were first su .....
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Analog Vs Digital
.... attraction. Because of competition by many companies price is always being driven down. Also, the many different customizable price plans offer an affordable package for any type of budget. Companies, which offer digital PCS service are always looking to lure new customers, and therefore are in constant review of their plans always trying to make sure they are treating their customers properly. This eventually leads to the best product for the customer.
If there is any drawback to digital PCS it is tha .....
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Can Machines Think On Alan Turing’s Computer Machinery And I
.... a machine.2
The type of machine used is limited to a digital computer. This is by no means a limitation as foreseen by Turing that “in about fifty years time one will be able to speak of machines thinking without expecting to be contradicted”.3
Speaking of machines thinking is one thing but a computer passing Turing’s imitation game, now known as ‘The Loebner Prize’4 is another, presently unaccomplished feat.
In summary of Turing’s case for machine’s thinking I accept and applaud his counterargum .....
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Digital Block For A Function Generator
.... this control block.
Therefore it is clear that the digital block can be divided into 4 distinct blocks, each with its own functionality. These blocks are the control module, counter module, filter control module and 8-bit D/A. The D/A chosen is the DAC0801LCN. It’s specifications can be found in the appendix. The layout of this design is shown below.
The interconnections will be discussed later but the thickness of the lines indicates the number of bits in the .....
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Ecommerce
.... marketplace. Consumers are not the only ones "surfing" around for info. Businesses also focus on other companies to sell their products. General Electric sold machine and appliance parts using a new business to business technology called "extranet". GE used its successful "extranet" to roll in 1996 online sales of one billion dollars. Another very successful type of business on the net is the coming of services backed by research, such as discount stock trading, including e.Schwab and a Web-only company .....
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F117 Nighthawk Stealth Fighter
.... the Nighthawk is unlimited with air refueling from another plane. The engines of the Nighthawk are two
12,500lb. General Electric F404-F1D2 non-afterburning turbofan engines with 10,600 lbs. of thrust. The Nighthawk’s armament is a non-fixed internal weapons carriage and the primary weapons on the Nighthawk are the paveway series GBU-10 and GBU-27 laser guided bombs. There is usually one person to fly the Nighthawk and the cost to build each Nighthawk is around 45 million dollars. The United Stat .....
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Fifth Generation Computers
.... Mhz. These processors are also now starting to become obsolete. Todays computers come equipped with 400-600 Mhz processors that can multi-task at an alarming rate. Intel has just started the release phase of it’s new Pentium III-800MHz processor. Glenn Henry is
quoted to say “Megahertz is all people care about” and this is too true. Sys Technology recently came out with what they claim as the “fastest commercially available PC”. This computer runs at an astonishing 1000 Mhz or 1 Ghz. This computer .....
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Firewalls
.... management. Lastly, a firewall can act as your corporate "ambassador" to the Internet. Many corporations use their firewall systems as a place to store public information about corporate products and services, files to download, bug fixes, and so forth.
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Future Of Television
.... that you hook up to your TV, and it changes the regular signal to digital to your TV screen you have at home now. That is approximately three to six thousand dollars. You are probably saying to yourself at this point, “Other than being more expensive, what am I
getting out of a HDTV that I am not getting from the TV at home? To start with, as of now, we use 525 lines of resolution,(makes up the screen, with colors) where HDTV has anywhere from 720 to 1080 (Sobel 73). Next, is the difference between t .....
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Fast Car Physics
.... 77). When a car rounds a turn at high speeds it often needs more force than it’s weight to resist the car’s tendency to keep traveling straight. The increased downforce puts more weight on the tires helping the tires grip the road.
Drag force is the cost of increasing downforce. Drag force is the force acting on an object in motion in the opposite direction the object is moving through a fluid (Yager). To most people drag force is simply known as air resistance. The objective of aerodynamic eff .....
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Green Architecture
.... into several areas of application. These areas include sustainability, materials, energy efficiency, land use, and waste reduction.
Green buildings are not only designed for present use, but consideration is also been given to future uses as well. An adaptable structure can be "recycled" many times over the course of its useful life. If specific technical issues prevent use of the building for a new function, then the materials used in its construction are designed to facilitate ease of rec .....
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Hackers
.... NEW USER QUESTIONNAIRE FROM A PHREAK/HACK BBS . 77
Introduction
The proliferation of home computers has been accompanied by a corresponding social problem involving the activities of so-called "computer hackers." "Hackers" are computer aficionados who "break in" to corporate and government computer systems using their home computer and a telephone modem. The prevalence of the problem has been dramatized by the media and enforcement agents, and evidenced by the rise of specialized private security .....
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High And Low Displacement Engines
.... in a 1/4-mile drag race but the Mustang would win in a race that’s longer than a 1/4 of a mile. They can also be made to produce as much power as a large engine but the engine life would be reduced due to the stress.
The advantage of small displacement engines is that they are fuel efficiency and weigh less than larger engines. The small displacement engine can also be modified to gain more power but the engine life is also reduced. The larger displacement is stronger and it can handle more modification .....
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