Abstract The paper discusses the development of organic light emitting diodes (OLEDs), one of the major technological breakthroughs since the invention of liquid crystal displays (LCDs) in providing digital lighting and display. The paper examines how these components display brighter colors, produce faster refresh rates, consume less power, and cost less to manufacture. The paper further discusses how OLEDs are being used in consumer electronics such as cellular phones, personal digital organizers (PDAs), and flat-screen televisions. The paper examines how these can be used in virtual reality, heads-up display (HUDs), and in the military. The paper concludes that the technology looks very promising, and may provide us with a cheaper and better alternative to current LCDs and LEDs in displaying bright and crisp digital images.
Table of Contents:
Executive Summary
Introduction to Topic
History / Background
Current Technology/Implementations/Understandings
A. OLED Structure
B. OLED Operation
C. Advantages
D. Disadvantages
Analysis of Existing Knowledge
Summary of Topic
Short Term Outlook
Recommendations and/or Conclusions
Bibliography
From the Paper "When electricity is applied to the OLED (around 2 to 10 volts), the electrical current is received by the cathode and gives electrons to the emissive layer. At the same time the anode also receives an electric current and it sucks electrons from the conductive layer. This creates "electron holes" between the emissive and conductive layers, which are then filled up. This is the step which creates light. To create brighter light, it is only necessary to increate the electrical current. To create colors, several OLED layers are used which contain color components for red, green, and blue (Freudenrich, n.d.)."
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."
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."
Abstract The experiment discussed in this paper aims to generate experimentally the lead-tin phase diagram from various proportions of the two metals in this binary system. It involves the preparation and heating in a test tube of mixtures containing 90%Pb-10%Sn, 80%Pb-20%Sn, 60%Pb-40%Sn, 40%Pb-60%Sn, and 20%Pb-80%Sn. The paper explains that the experiment requires the use of a thermocouple to monitor the temperature reading every 5 seconds until it drops off to 160 degrees C. Five cooling curves (temperature versus time), 1 for each mixture are generated, taking notes on the points of arrest and the critical temperatures. The paper shows that the integration of all the cooling curves produces the lead-tin phase diagram. The paper includes diagrams.
Paper Outline:
Abstract
Introduction
Experimental Section
Preparation of Set up and Samples
Experiment Proper
Results and Discussion
Conclusion
Recommendations
References
Appendix
From the Paper "The simplest phase diagrams are those of the binary alloys, a binary alloy being one that contains two components. In this type of phase diagram, temperature and composition are the variable parameters, the temperature usually being relegated to the y-axis and the composition to the x-axis (where the two composition scales of the two components run opposite to each other in magnitude, the 100% composition of each component coinciding with the 0% composition of the other component, and vice versa)."
An in-depth discussion regarding the need for the broader impacts of a scientifically and technologically literate and diverse workforce, and a review of the University of Central Oklahoma's optical/thermal scattering facility research project.
Abstract This paper discusses how engineering encounters many surfaces that posses vast quantities of irregularities and application of fundamental theories neither proves practical nor precise in obtaining true representations due to these irregularities. The paper further discusses how there exists a need for accuracy in thermo-physical property data in both industrial applications which demand a reliable method of determining data. According to the paper, this need can be met by the establishment of the optical/thermal scattering facility at the University of Central Oklahoma. The paper then reviews the advantages and disadvantages of this research program.
Outline:
Introduction
Importance of the Research
Review of the Literature
Scope of Academic Benefits
Research and Academic
Management Plan and Timeline
Dissemination and Sustainability
Evaluation
Summary and Conclusion
Methodology
From the Paper "This project also plans to augment the radiative heat transfer science behind this experimentation. The Hemispherical Scatterometer will be constructed based on the most widely used methods for solution of the radiative transfer equation (RTE) and the discrete ordinate method (DOM). Despite the fact that there has been a wide construction of similar apparatuses for BRDF determination [4,15,17,18,33-35,40,43-46] there has not been any device that makes use of the quadrature scheme of the DOM to obtain this property. By using the DOM theory, commercial computational fluid dynamic (CFD) software can be easily incorporated to develop new research and/or mathematical models. These involve heat transfer problems to be compared with standard or previous models. Another aspect where the PI's project will certainly have an impact on the community is in the surface and cataloging of pattern recognition of the mentioned surfaces. Many surfaces in engineering, specially the ones dealt in this project will perhaps contain roughness characteristics similar to the ones shown in Figure 4. Even though is a very smooth material (looked through one's eye) theoretical prediction of reflectance or surface properties is not feasible. However, performing cataloging and pattern recognition is a method that will allow us to recognize intrinsic features of materials and provide a deeper knowledge of material's use and extended applicability. At the same time possible complication while using textbook calculations comes from the fact that they take the surface to be an homogeneous material rather than, say, a layered structure without considering subsurface complications or they are too cumbersome to apply. Therefore, the result is that actual measurement of the reflectance function is the best way to determine this radiative property and measure it in such manner that could also be applied to radiation heat transfer solution method or any other industrial application. This is again, where this project takes the lead."
Tags: optical/thermal, scattering, facility, cancer, thermal, radiation, light, pigmentation, DNA
Abstract This paper discusses the substance, hexane, otherwise known as n-hexane or Hexyl hydride. According to the paper, Hexane is manufactured by the refining process of crude oil and the correct composition of the fraction depends more or less on the source of the oil that is crude or refined and the limitations of refining. The paper goes on to discuss the toxicity of Hexane to the environment and the effect it has on a human when consumed or absorbed into the bloodstream.
From the Paper "Now let us understand about the toxicity of Hexane to the environment. The severe toxicity of hexane in human beings remains comparatively low, even though it is a soft anesthetic. (Industrial products: Energizing Business) Hexane can get inside the human body through the lungs in case it is present inside the air one breathes. It has also the possibilities of entering the human body through the stomach as also the intestines in case it is present in the water we drink or food we eat or can pass through the skin in case one comes into contact with it. The quantity that the hexane goes into the human body is dependent on the degree one is exposed and also its amount. While we inhale hexane, it gets into our bloodstream and is transmitted to every other organ of the body. Hexane is broken down by the liver. In case of one gets exposure to high concentrations of hexane ranging over an extended period of time, one of these breakdown products might entail damage to the nervous system of humans. "
Tags: virtigo, dizziness, paraffin, neurotoxic, cancer, hydrocarbons, oxidizing, elements
Abstract In this article, the writer studies the character of Josiah Willard Gibbs, a mathematician and physicist. The writer discusses that he managed to achieve great things during his lifetime and lead the world on to greater and better scientific discoveries. The writer points out that Josiah Willard Gibbs has been recognized as one of the greatest American scientists of the nineteenth century. Further the writer notes that it is Gibbs who managed to provide a sound thermodynamic foundation to physical chemistry, to America and to the entire world.
From the Paper "The second work that Gibbons published in the same year was "A Method of Geometrical Representation of the Thermodynamic Properties of Substances by Means of Surfaces". From the years from 1876 to 1878, Gibbs published two memoirs, which were later to be combined into one work, entitled, "On the Equilibrium of Heterogeneous Substances". Added to this, Josiah Willard Gibbs has contributed to various other spheres, like for example, crystallography, the determination of planetary and comet orbits, and also to electromagnetic theory. The most interesting phenomenon that Gibbs managed to achieve was that he made the practical side of science appealing and fascinating. Gibbs was also recognized as a 'theoretical physicist' of international stature, and he received a patent in the year 1866 for an improved type of railroad brake."
Tags: thermodynamics, science, accomplishments, mathematical, field
Abstract This paper attempts to analyze the economic situation of current oil resources, the principles of supply and demand and the need for alternate energy as emphasized by President Bush. The paper discusses how if we want global economic stability, the energy sector requires due attention. The rising demand for oil, its increasing prices and possible depletion of oil resources demand alternative energy sources. The paper contends that other countries should join the US in pushing for economic betterment of their countries and the world in general.
Outline:
Energy Scenario in US and Bush Administration
Economy of Energy Sector
Demand for Energy
Supply of Energy
Demand and Supply Equation
Oil Peak and Search for Alternative Sources
Conclusions
From the Paper "President Bush has started giving more importance to alternate energy sources. In order to emphasize the need for alternate energy sources he toured advanced energy technology companies in Wisconsin and Michigan. He talked about different energy sources and new options like nuclear energy, solar power and a hybrid gas-electric car. "Overall, Bush's 2007 energy plan calls for a 22% increase in clean-energy research at the Department of Energy. It seeks to invest more in low-pollution coal-fired power plants, solar and wind technologies and nuclear energy" (Benedetto, 2006)."
Abstract This paper discusses crystallography, which is the scientific study of crystals. The paper specifically introduces quasicrystals and discusses their discovery in 1982. The paper goes on to analyze the properties, symmetry and application of quasicrystals, looking closely at how they differ from classical crystals. The paper includes many diagrams to illustrate its points.
Table of Contents:
Classical Crystals and Quasicrystals: An Overview
Quasicrystals in Focus
Symmetry of Quasicrystals and the Concept of Higher Dimensional Space
Types of Quasicrystals
Structure Models, Structure Solution Techniques, and Software Modeling
Properties of Quasicrystals
Applications of Quasicrystals and Research Areas in Quasicrystallography
From the Paper Crystallography, the scientific study of crystals, can be traced as far back as the 17th century, when scientists such as Johannes Kepler and "Robert Hooke published works presenting ideas on the microscopic structure of crystals. Numerous studies in this field resulted in the systematized discipline of crystals as it is known today. Following these developments, "crystallography" evolved from "the scientific study of crystals" to "the experimental science of determining the arrangement of atoms in solids." This evolution to cover all possible atomic arrangement was inevitable especially with the discovery of solids that cannot be confined within the conventional definition of a crystal."
Abstract This paper offers a detailed history of Einstein and the effects his works have on the world, including nuclear energy. It discusses his many theories and explains that often times these works were of religious motivation. The paper also discusses Einsteins effect not only in the science arena, but also on art and the development of Modernism and Post-Modernism in particular.
From the Paper "In more theoretical terms, Einstein postulated several theories that challenged the nature of time and suggested both its relative nature depending on how it is measured and the possibility that it is reversible, something that clearly went against the traditional view. Einstein is really the figure around whom the changes in both the sense of time and of space swirl, for his theories challenged both and suggested ways in which both time and space could be changed, bent, twisted, and made into something different than people had once believed."
Abstract This paper discusses the theories of Martin Heidegger which he presented in a book called "Being and Time." The paper describes his theories of nothingness and human "dread" and compares them to Deepak Chopra's similar quantum physics theories. The paper describes the basic meaning of the theories and concludes that had Heidegger possessed Chopra's gift for simplifying language, his concepts of nothingness might have been recognized sooner.
From the Paper "Heidegger's theory of human "dread" is interestingly at the core of what he believes to be our deep-seated awareness of "nothing." The fact that humans are deeply aware that we will perish into nothing is what gives defineable value to our human experience. In other words, while we know consciously that everything in our human world will change and die, we also know that this concept does not apply to a world of nothing. Heidegger evidently had no faith in the possibility of an afterlife that might include any thing relative to our human existence. In his view, the inescapable loss of somethingness is at the bottom of the human "angst." (Philosophypages)."
Abstract This paper examines how quantum cryptography is a fast growing form of encryption that is not based upon the difficulty of mathematical algorithms and instead employs quantum physics to encrypt information on the physical level. It emphasizes the need for an innovative cipher as well as the need to inform the IT community regarding the commercial application of quantum cryptography. It also provides a broad overview of the quantum cryptographic protocol and operation using fiber optic media.
From the Paper "The integrity of information between sender and receiver relies upon secure channels and more importantly the ability to protect the information from unauthorized recipients. The transmission of information can be compromised when a third party listens in on the transmission media measuring the physical object. Consequently, the eavesdropper can effectively intercept the contents of a communication. Certain types of classical cryptography have proven vulnerable to the interception of data and the incident can remain undetected during the entire transmission. This idea of a man-in-the-middle attack on communication media using quantum cryptography is not possible due to the laws of quantum mechanics. Quantum superposition's and quantum entanglement are two properties of quantum physics used to detect eavesdropping. "
Abstract This paper discusses one of the most significant scientific discoveries of the twentieth century, the discovery of the helical structure of deoxyribonucleic acid (DNA). According to the paper, Watson revealed this discovery in his book, 'The Double Helix: A Personal Account of the Discovery of the Structure of DNA'. This paper reviews Watson's book and the fact that DNA was not discovered by a single person, nor by a group of scientists. The DNA discovery was the result of a complex series of advancements, discoveries and inspirations by many independent groups.
From the Paper "Watson next goes on a series of European excursions and vacations; including being able to finally listed to Pauling. When he returns to Cambridge in the fall, Watson exhibits less preoccupation with DNA, and hears of the discovery by some bacteriologists that some bacteria actually reproduce sexually. This causes Watson to muse that the microbial genetics of them could be understood within a few years after DNA's structure is discovered. In the meantime, Watson writes that Franklin's X-Ray data "were getting prettier and prettier," (Watson 148). Furthermore, he credits her with obtaining the data indicating that the sugar-phosphate backbone of DNA was actually on the outside of the molecule; still, "She gave no sign . . . of liking helices any better," (Watson 148). Watson continues to explain his faith-based understanding of DNA when he writes, "The idea of the genes' being immortal smelled right," (Watson 153). After this leap of inference, however, Watson learns that Pauling is about to unveil another discovery regarding DNA; this worries most everyone at Cambridge. "
Abstract This paper discusses the energy trade in the United States. It discusses the increasing need for energy compared to the consumers' decreasing knowledge about where energy is coming from. The paper then discusses President Bush's State of the Union Address for 2006, in which he outlined his new advanced energy initiative, with the overall goal of reducing dependence upon Middle Eastern oil. It then addresses this goal to further advance the use and technology of solar and wind energy resources.
From the Paper "Renewable energy has been used in various, yet mostly private applications for many years, with ah classic example of the farmer using a solitary windmill to provide energy to a pump that provides water to his fields or livestock or the application of several solar cells on the roofs of homes, either in remote locations where other sources of power are to expensive to obtain or in the city where the novice environmentalist wishes to "get off the grid." Yet, these applications are very limited and the much larger possible applications and the technology that drives them can be rather expensive, in comparison to other forms of energy attainment, especially with regard to initial investment. One of President Bushes stated goals is to reduce the cost of these investments through the development of less costly technologies. Though is a relatively simplistic look at the actual numbers, wind energy, on its own has increased in capacity significantly in the last few years and the same can be said of solar renewable resources."
Abstract This paper discusses John von Neumann's contributions to the fields of quantum physics, functional analysis, set theory, economics, computer science, numerical analysis, hydrodynamics, statistics and other mathematical fields. The paper also discusses his contribution to the creation of the hydrogen bomb. It goes on to describe some of his most influential achievements.
From the Paper "John Von Neumann inarguably contributed a wealth of knowledge to the development of computers, and without his contributions the face of technology today would be primitively underdeveloped. However, Neumann may have canceled out the "good" he did in an act of self-fulfilling equivalent exchange with his work in the realms of math and science with the contributions he made to warfare and massive weaponry. The name Von Neumann is associated as much with the Atomic Bomb as it is with computer programs (Wilson), and Neumann may have had even more devastating projects on the horizon at the time of his unexpected death from cancer. During the Second World War, von Neumann worked as a consulted to both armed forces and civilian agencies that were involved in wartime projects. Neumann's genius was in high demand, and he was able to design an implosion method for bringing nuclear fuel to explosion, as well as playing an integral part in the development of the hydrogen bomb. (Cabrera) According to one of Neumann's biographers, "It has been stated that von Neumann's electronic computer hastened the hydrogen bomb explosion on November 1, 1952." (Bochner)"
