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Computers

... through the techniques of automation, and they have enhanced modern communication systems. They are essential tools in almost every field of research and applied technology, from constructing models of the universe to producing tomorrow's weather reports, and their use has in itself opened up new areas of conjecture. Database services and computer networks make available a great variety of information sources. The same advanced techniques also make possible invasions of privacy and of restricted information sources, but computer crime h ...

Number of words: 2363 | Number of pages: 9

Cellular Radio, Isdn Networks And Satellite Communications

... Users can be stationary or mobile. It means users are no longer constrained to place to place as it is a “wireless” system. 2. What is ISDN (Integrated Services Digital Network)? ISDN is a system which provides digital capacity i.e. voice, video and data transmission in digital form, to be sent and received by a customer. Unlike stand alone services such as telephone, telex, fax and data communications, ISDN is a network which can offer all these services as a package in which a user can talk, exchange data, faxes and other docum ...

Number of words: 1695 | Number of pages: 7

"How Is Helium Produced?"

... the world in liquid form in large cryogenic containers. The Helium is filled into liquid containers, gas cylinders and cylinder packs as necessary. History of Helium Production: Government involvement in helium conservation dates to the Helium Act of 1925 which authorized the Bureau of Mines to build and operate a large-scale helium extraction and purification plant. From 1929 until 1960 the federal government was the only domestic helium producer. In 1960, Congress amended the Helium Act to provide incentives to natural gas producer ...

Number of words: 1143 | Number of pages: 5

Air Pollution

... States, Canada, and most other industrial nations. the major pollutants produced by these sources are carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. Nitrogen oxides can react with hydrocarbons in the prescence of sunlight to produce a form of oxygen called o-zone. O-zone(O³) is the chief component of photochemical smog, which is a common form of . Fuel combustion for heating and cooling homes,offices,buildings, and factories contribute significantly to . Electric power plants that burn coal or oil in also ...

Number of words: 788 | Number of pages: 3

The Effects Of Acid Rain On Lakes And Trees

... 20). Acid rain does not kill the trees directly. Acid rain makes the tree weaken and poisons it with toxic substances that are slowly released from the soil (EPA). When the trees weaken from the acid, it has a harder time fighting off adversaries such as fungi, diseases, and frost so subsequently it dies. Around the 1970s the acid rain dilemma got worse, the acid rain has put trees in danger and now they are starting to die off. The effects of acid rain on a tree is shown if it has less foliage, yellow spots and pr ...

Number of words: 594 | Number of pages: 3

Acid Rain 8

... during the Industrial Revolution, and has been growing ever since. The severity of its effects has long been recognized in local settings, exemplified by the spells of acid smog in heavily industrialized areas. The widespread destructiveness of acid rain, however, has become evident only in recent decades. One large area that has been studied extensively is northern Europe. In 1984, for example, environmental reports indicated that almost half the trees in Germany’s Black Forest had been damaged by acid rain. This form of pollution ...

Number of words: 417 | Number of pages: 2

Condor

... cliffs that usually have nearby trees for roosting and a clear approach for easy take-offs and landings. Typically, an adult pair lays one egg every other year, with the fledgling being dependent upon its parents through the next breeding season. Like all vultures, s are carrion-eaters. They prefer large dead animals like deer, cattle, and sheep, but will also eat rodents and more rarely, fish. If a meal has been particularly big, they may have to spend hours on the ground or a low branch before they can take off again. s are fastidious bird ...

Number of words: 1212 | Number of pages: 5

Biology, The Five Major Compounds

... is to serve as sources of energy. Carbohydrates are some of the most numerous molecules in living organisms. They play a major role as food molecules in the cell, being broken down to produce energy. Polysaccharides play an important role serving as energy reserves also. It provides a quick-release energy source that keeps us going between meals. Small amounts of carbohydrates are also used for structural purposes and others are attached to outer surfaces of cell membranes to guide cellular interactions. For many cells, sugars are ...

Number of words: 1150 | Number of pages: 5

Add

... social problem. Sometimes a history of injuries to the central nervous systeem exsit. People with attention deficit disorder ( ) are easily distracted, and may be unable to focus more than a few moments on mental tasks. . They lack the ability to block out noise. A simple noise can capture their attention. children are often in a state of confusion. They are poor at prioritizing, recognizing what is important, and making decisions based on reverent factors ( Taylor 15) While observing a child with for one hour a few key things stood o ...

Number of words: 726 | Number of pages: 3

God Guided Evolution

... the Christian God, created all the inhabitants of this universe on his will alone. The middle ground is the theory that a supreme being guided the evolutionary path of all organisms to their current status. Through reading the Holy Bible, and studying numerous science authorities, logical deductions can be made that would help one form his own opinion on the matter. One might go so far to say as science and the Bible are God’s most basic forms of communication with the human; thus scientific deduction of the Bible should allow us to ...

Number of words: 1329 | Number of pages: 5

Alcoholism 3

... (spirits) such as WHISKEY, GIN, and VODKA, which on the average contain from 40% to 50% alcohol. Drinkers may become addicted to any of these beverages. Physical Effects of Alcohol The effects of alcohol on the human body depend on the amount of alcohol in the blood (blood-alcohol concentration). This varies with the rate of consumption and with the rate at which the drinker's physical system absorbs and metabolizes alcohol. The higher the alcohol content of the beverage consumed, the more alcohol will enter the bloodstream. The amount ...

Number of words: 1209 | Number of pages: 5

Newton's Method: A Computer Project

... guess may give you the wrong root for the function. With Mathematica, a program for Newton's method can be produced and a graph of the function can be made. From the graph, the a good initial guess can be made. Although Newton's Method works to find roots for many functions, it does have its disadvantages. The root sometimes cannot be found by using Newton's Method. The reason it sometimes cannot be found is because when the function is equal to zero, there is no slope to the tangent line. As seen in experimentation's, it is important to ...

Number of words: 372 | Number of pages: 2

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