Science Essays
Computer vs Brain
Computer vs Brain Over the years, man has come up with countless inventions, each more resourceful than the last. However, as the computer age continues, mankind is threatened. Ridiculous, some may say, but I say look around! The computer has already begun to control so many of the vital functions that man has prided himself upon before. Our lives are now dependent on a computer and what it tells you. Even now, I type this essay on a computer, trusting that it will produce a re...
Computers Invention of the Century
Computers - Invention of the Century Computers: Invention of the Century The History of Computers Only once in a lifetime will a new invention come about to touch every aspect of our lives. Such devices changed the way we manage, work, and live. A machine that has done all this and more now exists in nearly every business in the United States. This incredible invention is the computer. The electronic computer has been around for over a half-century, but its ancestors hav...
Anti Matter 3
Anti-Matter Introduction Ordinary matter has negatively charged electrons circling a positively charged nuclei. Anti-matter has positively charged electrons - positrons - orbiting a nuclei with a negative charge - anti-protons. Only anti-protons and positrons are able to be produced at this time, but scientists in Switzerland have begun a series of experiments which they believe will lead to the creation of the first anti-matter element — Anti-Hydrogen. The Research ...
Aquatic Biome
Aquatic Biome Water is the common link among the five biomes and it makes up the largest part of the biosphere, covering nearly 75% of the Earth’s surface. Aquatic regions house numerous species of plants and animals, both large and small. Without water, most life forms would be unable to sustain themselves and the Earth would be a barren, desert-like place. Although water temperatures can vary widely, aquatic areas tend to be more humid and the air temperature on the cooler s...
Archimedes
Archimedes Archimedes Archimedes (287-212 BC), was a preeminent Greek mathematician and inventor, who wrote important works on plane and solid geometry, arithmetic, and mechanics. Archimedes was born in Syracuse, Sicily, and educated in Alexandria, Egypt. In pure mathematics he anticipated many of the discoveries of modern science, such as the integral calculus, through his studies of the areas and volumes of curved solid figures and the areas of plane figures. He also prov...
Artificial Intelligence Report
Artificial Intelligence Report Recently, the media has spent an increasing amount of broadcast time on new technology. The focus of high-tech media has been aimed at the flurry of advances concerning artificial intelligence (AI). What is artificial intelligence and what is the media talking about? Are these technologies beneficial to our society or mere novelties among business and marketing professionals? Medical facilities, police departments, and manufacturing plants have all...
Aspirin
Aspirin Aspirin is in the purses and backpacks of over millions of people around the world. Americans consume more than 80 billion tablets of aspirin a year. The drug has an incredible past and an amazing future. The past of aspirin reaches as far back as Hippocrates in the fifth century B.C. where he used a powder from a willow tree to ease aches and pains. To the future in laboratories and clinics where scientists are looking for new uses for this “Wonder Drug.”...
Astrology
Astrology The basic astrological assumptions are not hard to grasp. For if astronomy is the study of the movements of the heavenly bodies, then astrology is the study of the effects of those movements. The astronomers of the ancient world assumed a division of the universe whereby the superior, immutable bodies of the celestial worlds ruled over the terrestrial or sublunary sphere, where all was mortality and change. It was assumed that the stars had special qualities and influ...
Atmospheric Circulation and More
Atmospheric Circulation and More The global energy balance and atmospheric motion mainly determine the circulation of the earth’s atmosphere. There is a hierarchy of motion in atmospheric circulation. Each control can be broken down into smaller controlling factors. The global energy balance is an equal balance of short-wave radiation coming into the atmosphere and long-wave radiation going out of the atmosphere. This is called thermal equilibrium. The earth is ...
Atomic Bomb
Atomic Bomb Just before the beginning of World War II, Albert Einstein wrote a letter to President Franklin D. Roosevelt. Urged by Hungarian-born physicists Leo Szilard, Eugene Wingner, and Edward Teller, Einstein told Roosevelt about Nazi German efforts to purify Uranium-235 which might be used to build an atomic bomb. Shortly after that the United States Government began work on the Manhattan Project. The Manhattan Project was the code name for the United States effort to deve...
Baby Eye Testing
Baby Eye Testing U OF T PROFESSORS DEVISE BETTER WAY TO TEST SIGHT IN BABIES In a darkened room at Toronto’s Hospital for Sick Children, a baby, its head dotted with electrodes, sits in its mother’s lap and watches flashing black and white checkerboards and stripes on a television screen. Soon after the test, doctors will know if the child can see and how well it can see. The testing procedure, which involves mea...
Balsawood Structure Design
Balsawood Structure Design 1. Introduction: This report is the first stage of the design, construction and testing of a balsa wood structure. In April, the design will be tested against classmates’ designs, where the design with the highest load/weight ratio wins. The information gained from this report will be used in the construction of the structure. The report is composed of two sections. The first is an evaluation of material properties of balsa, glues and dif...
Big Bang
Big Bang It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an...
Biochemistry Prolonged Preservation of the Heart Prior to Transplantation
Biochemistry - Prolonged Preservation of the Heart Prior to Transplantation Picture this. A man is involved in a severe car crash in Florida which has left him brain-dead with no hope for any kind of recovery. The majority of his vital organs are still functional and the man has designated that his organs be donated to a needy person upon his untimely death. Meanwhile, upon checking with the donor registry board, it is discovered that the best match for receiving the hea...
Bioethics
Bioethics Bioethics, which is the study of value judgments pertaining to human conduct in the area of biology and includes those related to the practice of medicine, has been an important aspect of all areas in the scientific field (Bernstein, Maurice, M.D.). It is one of the factors that says whether or not certain scientific research can go on, and if it can, under which rules and regulations it must abide by. One of the most recent and controversial issues facing our soci...
Blue Boxing
Blue Boxing To quote Karl Marx, blue boxing has always been the most noble form of phreaking. As opposed to such things as using an MCI code to make a free fone call, which is merely mindless pseudo-phreaking, blue boxing is actual interaction with the Bell System toll network. It is likewise advisable to be more cautious when blue boxing, but the careful phreak will not be caught, regardless of what type of switching system he is under. In this part, I will explain how and why ...
Bronchitis
Bronchitis Bronchitis is the inflammation of the bronchi. It may develop suddenly, following a head cold (acute bronchitis), or it may persist or return regularly for many years, causing progressive degeneration of the bronchi and lungs (chronic bronchitis). Certain people are more susceptible than others; Men are more of a target to bronchitis than women, out numbering them 10 to 1 ©© the reasons are unclear. Of course smokers are 50 times more likely to get chronic bronch...
Calcium transport study of SF 9 lepidopteran cells
Calcium transport study of SF-9 lepidopteran cells Calcium transport study of SF-9 lepidopteran cells and bull frog sympathetic ganglion cells ABSTRACT The intracellular calcium level and the calcium efflux of the bull-frog sympathetic ganglion cells (BSG) and the SF-9 lepidopteran ovarian cells were investigated using a calcium-sensitive fluorescence probe fura-2. It was found that the intracellular calcium levels were 58.2 and 44.7 nM for the BSG cells and SF-9 cells r...
Acid Rain
Acid Rain Where does Acid Rain come from? What are the effects of Acid Rain? What can we do about Acid Rain? These are the three questions I hope to answer today. Acid Rain is a pollutant in our society and can be even seen as synonymous to the word evil, due to the fact that nothing good has come from it. The two primary sources of Acid Rain are nitrogen oxides and sulfur dioxides. They effect our lakes and rivers, trees, buildings and even us. It is a necessity to be aw...
African Widow Bird
African Widow Bird Finding good day care can certainly pose a problem these days, unless, of course, you’re an African widow bird. When it comes time for a female widow bird to lay her eggs, she simply locates the nest of a nearby Estrildid finch and surreptitiously drops the eggs inside. That’s the last the widow bird ever sees of her offspring. But not to worry, because the Estrildid finch will take devoted care of the abandoned birds as if they were her own....
Aids And You
Aids And You (May 1987) By Martin H. Goodman MD (this essay is in the public domain) Introduction: AIDS is a life and death issue. To have the AIDS disease is at present a sentence of slow but inevitable death. I’ve already lost one friend to AIDS. I may soon lose others. My own sexual behavior and that of many of my friends has been profoundly altered by it. In my part of ...
Aids Epidemic
Aids Epidemic The Aids Epidemic The AIDS virus is one of the most deadly and most wide spread diseases in the modern era. The disease was first found in 1981 as doctors around the United States began to report groups of young, homosexual men developing a rare pneumonia caused by an organism called Penumocystis carini. These patients then went on to develop many other new and rare complications that had previously been seen only in patients with severely damaged immune systems....
Aids and Your
Aids and Your AIDS and YOU (May 1987) By Martin H. Goodman MD (this essay is in the public domain) Introduction: AIDS is a life and death issue. To have the AIDS disease is at present a sentence of slow but inevitable death. I’ve already lost one friend to AIDS. I may soon lose others. My own sexual behavior and that of many of my friends has been profoundly altered...
Air Pollution
Air Pollution Introduction Air pollution is nothing new. Ever since the discovery of fire, less-than-desirable substances have been vented into the air. One of the first air-pollution regulations dates back to the fourteenth century, when King Edward I banned the burning of sea coal in lime kilns. U.S. air-pollution regulations have their roots in British Common Law. But regardless of those efforts, air pollution continues to be a serious local and world-wide problem. Polluti...
Alchemy
Alchemy Alchemy, ancient art practiced especially in the Middle Ages, devoted chiefly to discovering a substance that would transmute the more common metals into gold or silver and to finding a means of indefinitely prolonging human life. Although its purposes and techniques were dubious and often illusory, alchemy was in many ways the predecessor of modern science, especially the science of chemistry. The birthplace of alchemy was ancient Egypt, where, in Alexandria, it b...