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Sintering, 2004.
Examines the sintering of Cu and Cu-Zn pellets and recrystallization of brass.
2,750 words (approx. 11.0 pages), 5 sources, MLA, $ 82.95
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Abstract
Sintering, which is a stage of powder metallurgy, is a thermal process that creates inter-particle welds. It is where powder compacts are annealed in a controlled atmosphere to a temperature at which solid-state diffusion occurs. On the other hand, recrystallization is the process of the formation of new strain-free grains from initially cold-worked grains. This paper examines an experiment that had, as its objectives, the intention of examining of the effects of sintering and recrystallization on the microstructure and the hardness of the specimens. The samples used are copper and copper-zinc powders for sintering and brass for recrystallization. The paper shows that the copper and copper-zinc powders are compacted and are sintered in a nitrogen-containing atmosphere at different temperature and time settings. The brass samples are cold-worked and are annealed at different temperature and time settings. The paper includes tables.
Paper Outline:
Abstract
Introduction
Experimental Section
Results and Discussion
Conclusion
References
From the Paper
"When a polycrystalline metal is cold worked, the grain boundaries act to interrupt the slip processes that occur in the crystals. The lattice adjacent to the grain boundaries is much more distorted in the center of the grains. Decreasing the grain size increases the grain boundary area and, as a consequence, the volume and the uniformity of the distorted metal. This effect decreases the number of possible sites of nucleation and, therefore, the smaller the grains of the metal before cold work, the greater will be the rate of nucleation and the smaller the recrystallized grain size for a given degree of deformation."
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Heat Treatment of Steel, 2004.
Examines a process that increases the hardness of steel.
1,354 words (approx. 5.4 pages), 3 sources, MLA, $ 45.95
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Abstract
When steel is heat treated, the size and morphology of its phases are changed. The samples used in this paper are AISI 1045 and 4140 steels. Four samples each of AISI 1045 and AISI 4140 are shown to be subjected to annealing and quenching while eight samples of AISI 1045 are subjected to tempering. Photomicrographs and hardness of each sample are taken. From the results, the paper shows that quenching increases the hardness of steel and increasing the cooling rate increases the hardness of the sample due to the formation of fine grains of pearlite. Increasing the tempering temperature reduces the hardness of a specimen. The paper includes graphs.
Paper Outline:
Introduction
Experimental Section
Results and Discussion
Conclusion
References
From the Paper
"Theoretically, a quenched specimen should be harder than tempered specimens. This is due to the interstitial carbon atoms that deter dislocations along the lattice. The relatively higher hardness of a quenched specimen may also be attributed to the few slip systems of the BCT crystal structure. From the microstructure, the trapped carbon atoms are evident as the black regions."
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Economic Thermodynamics, 2006.
A discussion regarding thermodynamics and economics.
1,350 words (approx. 5.4 pages), 4 sources, $ 53.95
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Abstract
This paper discusses the question of including thermodynamics in the study of economics. It is very important to include it when studying neo-classical economics and free-market activity because it alone seems capable of introducing consumption pattern analysis into the study of economics. Thermodynamics is important within ecological economics and within economics in general because the environment within which all economies function is anchored in a finite system that is constrained by its very nature and character.
From the Paper
"Resources are limited and many are not reproducible in any type of practical natural sense that would allow even sustainable growth models to be applicable. Petroleum will eventually be completely depleted and the natural process of producing it is simply not a practical option that would result in sustainable consumption patterns. "
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The Nantucket Sound Wind Farm Proposal, 2006.
This paper discusses the Nantucket Sound wind farm proposal, and it's value to the USA.
675 words (approx. 2.7 pages), 5 sources, $ 26.95
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Abstract
This paper discusses the issues of should the Nantucket Sound wind farm be allowed to proceed and do the apparent benefits outweigh the risks that opponents have outlined? In a word: yes. According to the paper, the Nantucket Sound wind farm proposal should move forward in its development. It represents a renewable source of clean electricity that has minimal impact upon the region--both environmentally and economically. The coming years will see ever-increasing costs for nonrenewable sources of electricity such as coal and natural gas. The Nantucket Sound region has the ability to produce much of its own electricity, cheaply and efficiently. The region should take advantage of that resource.
From the Paper
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Development of Science, 2006.
This paper looks at the development of science and technology as it relates to the effects of World War II.
675 words (approx. 2.7 pages), 3 sources, $ 26.95
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Abstract
This essay examines and discusses the impact of World War II on the development of science and technology. The discussion includes several examples, mainly pertaining to the development of nuclear science, weapons, medical research and genetics. The writer points out that since the end of World War II there has been an almost complete merger of science and technology, and governments and the industry now support most pure science research. Further, the writer notes that according to McClellan and Dorn, the example of the atomic bomb development in the US during World War II marks a watershed in the history of modern science and technology.
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Electrical Stimulation, 2006.
A discussion regarding electricity and the role it plays in the field of medicine.
675 words (approx. 2.7 pages), 6 sources, $ 26.95
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Abstract
This paper discusses how with the advent of electricity in the 19th Century, there came many changes to the field of medicine. Some of these were quack remedies or methods (such as electroshock therapy) which have fallen out of favor. Yet, today, there are still applications for electricity and electrical stimulation that are used in medicine. This paper summarizes the research and activity being done regarding the following topics: electricity in medicine, electrophysiology, electrotherapeutics, magnetic fields and neural stimulation. The paper further relates each of these areas to the human brain.
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Seyyed Hossein Nasr: His Life and Ideas, 2006.
A review of the life and history of Seyyed Hossein Nasr.
1,125 words (approx. 4.5 pages), 5 sources, $ 44.95
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Abstract
This paper discusses the life and history of Seyyed Hossein Nasr, born in 1933 in Tehran to a relatively wealthy family that was able to provide him with a premier education. According to this paper, Nasr used that education well. He was sent to the United States to study at the age of twelve in 1945, where he would spend the next thirteen years. During his time in the United States Nasr expanded his working knowledge into many fields. He did undergraduate work in physics and graduate work in geology geophysics and the history and philosophy of science. The paper further discusses how the sciences proved too limiting for Nasr. Using his extensive knowledge of the Western scientific process and its consequent secularism, Nasr made a career out of challenging these fundamental Western ideologies.
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Grand Unified Theory and Strings, 2006.
A review of the concept of Grand Unified Theory.
900 words (approx. 3.6 pages), 3 sources, $ 35.95
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Abstract
This paper introduces the concept of Grand Unified Theory--or GUT--the major accomplishments of the theory to date, as well as the most promising directions for the future. Foremost among these is the emergence of string theory or superstring theory in physics: it may provide the tools necessary to ultimately link the major branches of physics under the overarching cosmological model of the universe.
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The Illusion of Motion, 2006.
A look at the philosophy of Zeno/Parmenides as it relates to the concept that motion is an illusion.
675 words (approx. 2.7 pages), 2 sources, $ 26.95
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Abstract
This paper explains how the philosophy of Zeno/Parmenides relates to the scenario with the concept that motion is an illusion. Zeno, in support of Parmenides' teachings, created the paradox of dichotomy. The paper then discusses this paradox and how it contends that an object may be observed as traveling from point A to point B within a given time frame. However, Zeno concluded that on a scale of travel the object was consistently tasked with traveling to other points in between point A and point B. Each of these points, according to the philosopher, could be divided in half, which led to the object continuously having to pass through points of travel. Since the distances had the possibility of being divided without end, the process of travel was infinite, or never ending.
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Nuclear Energy, 2006.
A discussion regarding the controversial issue of nuclear energy.
1,125 words (approx. 4.5 pages), 4 sources, $ 44.95
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Abstract
This essay addresses the issue of nuclear energy in relation to society's emerging need for a new source for electrical energy. First it discusses the generals of how nuclear energy works, and then follows with the possible advantages of nuclear energy over its main competitors. Finally, it is concludes that nuclear energy should be expanded in the future, and that the dangerous stigma attached to it is largely unjustified.
From the Paper
"The notion of harnessing the atom's power to provide energy for civilization is reasonably new. However, it was recognized early in the twentieth century that the forces holding the atom together, if released, could produce an unbelievable amount of energy. From Einstein's interpretation of the universe, matter itself possessed a direct relationship to energy; the subsequent discovery of fission laid the foundation for the notion of nuclear power. "In 1934, physicist Enrico Fermi conducted experiments in Rome that showed neutrons could split many kinds of atoms. The results surprised even Fermi himself. When he bombarded uranium with neutrons, he did not get the elements he expected. The elements were much lighter than uranium," (University of Missouri-Rolla). Clearly, this suggested that the mass was going somewhere--it was being converted into energy."
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The Importance of Science and Technology in Canada., 2006.
A look at the relationship between science and technology from a Canadian perspective.
1,800 words (approx. 7.2 pages), 6 sources, $ 71.95
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Abstract
This paper discusses the link between science and technology, as advances in science make technology and advances in technology possible. It further discusses Marx's idea that science and technology are always closely linked with progress and development, especially over the last 200 years. Science has made many things possible. Science has been able to identify, recognize, understand and explain many things and processes in our world and the universe. Medical science and technology are now able to treat and cure many diseases that were fatal in the past. Technology has been able to revolutionize communications, transport and manufacturing.
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Hans Albrecht Bethe, 2006.
A personal perspective of Hiroshima and Nagasaki.
1,350 words (approx. 5.4 pages), 0 sources, $ 53.95
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Abstract
This paper is an interpretation of a fictional letter written from the perspective of Hans Albrecht Bethe. According to this paper, Bethe was a theoretical physicist working on the United States' Manhattan Project during the second world war. This paper presents an idea of what he might have been feeling, following the nuclear blasts over Hiroshima and Nagasaki.
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