126,060 research outputs found

    They Don\u27t Understand

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    Drink, my friend, and no longer will you suffer. Drink till you\u27re drunk; drink till you forget you\u27re a, Navy man; drink the Captain\u27s commands away from your mind. Drink! Drink! Drink

    Expert systems for superalloy studies

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    There are many areas in science and engineering which require knowledge of an extremely complex foundation of experimental results in order to design methodologies for developing new materials or products. Superalloys are an area which fit well into this discussion in the sense that they are complex combinations of elements which exhibit certain characteristics. Obviously the use of superalloys in high performance, high temperature systems such as the Space Shuttle Main Engine is of interest to NASA. The superalloy manufacturing process is complex and the implementation of an expert system within the design process requires some thought as to how and where it should be implemented. A major motivation is to develop a methodology to assist metallurgists in the design of superalloy materials using current expert systems technology. Hydrogen embrittlement is disasterous to rocket engines and the heuristics can be very complex. Attacking this problem as one module in the overall design process represents a significant step forward. In order to describe the objectives of the first phase implementation, the expert system was designated Hydrogen Environment Embrittlement Expert System (HEEES)

    Поглинання телекомунікаційною системою автоматизованих інформаційно-пошукових підсистем про транспортні засоби як умова поліпшення якості роботи працівників НЦБ Інтерполу в Україні

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    (uk) У статті з’ясовується необхідність скорочення кількості баз даних по перевірці транспортних засобів та формування відповідного законодавчого підґрунтя. Розмежування баз даних у їх значущості як по горизонталі, так і по вертикалі діючих норм права не тільки позитивно вплине на дослідження діяльності працівника РА НЦБ Інтерполу, спрямованої на протидію злочинам, пов’язаним з транспортними засобами, але й підвищить якість їх роботи.(en) Need o f the reduction amount database opens in article on checking the transport facilities and shaping corresponding to legislative foundation. Distribution database upon their importance as horizontally so and vertically acting rates o f the right will positively influence upon studies of activity workman Interpol in Ukraine, besides perfect quality o f their work directed on reluctance o f criminality connected with transport facility

    Materials surface contamination analysis

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    The original research objective was to demonstrate the ability of optical fiber spectrometry to determine contamination levels on solid rocket motor cases in order to identify surface conditions which may result in poor bonds during production. The capability of using the spectral features to identify contaminants with other sensors which might only indicate a potential contamination level provides a real enhancement to current inspection systems such as Optical Stimulated Electron Emission (OSEE). The optical fiber probe can easily fit into the same scanning fixtures as the OSEE. The initial data obtained using the Guided Wave Model 260 spectrophotometer was primarily focused on determining spectra of potential contaminants such as HD2 grease, silicones, etc. However, once we began taking data and applying multivariate analysis techniques, using a program that can handle very large data sets, i.e., Unscrambler 2, it became apparent that the techniques also might provide a nice scientific tool for determining oxidation and chemisorption rates under controlled conditions. As the ultimate power of the technique became recognized, considering that the chemical system which was most frequently studied in this work is water + D6AC steel, we became very interested in trying the spectroscopic techniques to solve a broad range of problems. The complexity of the observed spectra for the D6AC + water system is due to overlaps between the water peaks, the resulting chemisorbed species, and products of reaction which also contain OH stretching bands. Unscrambling these spectral features, without knowledge of the specific species involved, has proven to be a formidable task

    Laser Welding in Space

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    Solidification type welding process experiments in conditions of microgravity were performed. The role of convection in such phenomena was examined and convective effects in the small volumes obtained in the laser weld zone were observed. Heat transfer within the weld was affected by acceleration level as indicated by the resulting microstructure changes in low gravity. All experiments were performed such that both high and low gravity welds occurred along the same weld beam, allowing the effects of gravity alone to be examined. Results indicate that laser welding in a space environment is feasible and can be safely performed IVA or EVA. Development of the hardware to perform the experiment in a Hitchhiker-g platform is recomended as the next step. This experiment provides NASA with a capable technology for welding needs in space. The resources required to perform this experiment aboard a Shuttle Hitchhiker-pallet are assessed. Over the four year period 1991 to 1994, it is recommended that the task will require 13.6 manyears and $914,900. In addition to demonstrating the technology and ferreting out the problems encountered, it is suggested that NASA will also have a useful laser materials processing facility for working with both the scientific and the engineering aspects of materials processing in space. Several concepts are also included for long-term optimization of available solar power through solar pumping solid state lasers directly for welding power

    AN EXAMINATION OF A DEVELOPMENT RIGHTS PURCHASE PROGRAM FOR ALASKA AGRICULTURAL LANDS

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    A report submitted to the Department of Natural Resources, State of Alaska, in accordance with terms of research contract OCTO 1142.Many Alaskans are concerned about the conversion of highly productive agricultural lands to nonagricultural uses now occurring in the state. Land on the urban fringes of Anchorage and Fairbanks that once produced vegetables and grains or supported dairy farms appears most vulnerable to this conversion. As major population centers grow, residential, shopping center and industrial land uses displace agriculture because they render greater returns. This displacement is viewed by some as not being in society's best interest. Those concerned about the loss of agricultural lands argue that these lands are some of the best agricultural lands in the state and are vital to maintaining the agricultural economy of the state. In addition, it is suggested that their preservation will help to maintain a much desired way of life and to provide needed open space. The state and municipal governments in Alaska have made attempts to intervene in the land market to slow down or stop agricultural land conversion. Methods employed to date include tax incentives and the sale of only the agricultural rights on state or municipal lands. This report discusses the feasibility of an alternative means of preserving agricultural lands, namely, the public purchase of development rights from private landowners. Under this voluntary arrangement, private agricultural landowners would be compensated for giving up their option to develop their land for nonagricultural purposes.Introduction: Overview, Plan of Report -- Market Failure and the Allocation of Agricultural Land Resources -- Agricultural Land Conversion in Alaska -- Present and Potential Agricultural Development in Alaska: Introduction, Present Agricultural Situation, Agricultural Lands for Future Development, Future Agricultural Development in Alaska -- Purchase of Development Rights: Suffolk County: History, Maryland, New Jersey, Massachusetts and Connecticut, Definition of Development Rights, Strengths and Weaknesses of Development Rights Purchases -- Applicability of a Development Rights Program in Alaska: Introduction, Development Rights Survey in Alaska: Response, Farm Size of Respondents, Interest in Selling Development Rights, Market Values of Cleared and Uncleared Agricultural Lands, Value of Development Rights, Distance from a Population Center, Interest in Selling Development Rights, and Perceived Value of Development Rights -- Economic Size Agricultural Operations -- Potential Costs of a Purchase of Development Rights Program: Other Costs -- Benefits of Development Rights Acquisition: Maintenance of the Local Agricultural Economy, Locally Produced Food, Open Space and Other Public Good Amenities, Removal of Uncertainty -- Other Agricultural Land Control Tools: Comparison of Agricultural Land Preservation Tools -- Summary and Conclusions -- References -- Appendix A: Operation of of Purchase of Development Rights Programs -- Appendix B: Alaska Agricultural Lands Survey -- Appendix C: Additional Comments from Respondents -- Appendix D: Alternative Agricultural Land Control Technique

    Profiles of electrostatic potential across the water-vapor, ice-vapor and ice-water interfaces

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    Ice-water, water-vapor interfaces and ice surface are studied by molecular dynamics simulations with the SPC/E model of water molecules having the purpose to estimate the profiles of electrostatic potential across the interfaces. We have proposed a methodology for calculating the profiles of electrostatic potential based on a trial particle, which showed good agreement for the case of electrostatic potential profile of the water-vapor interface of TIP4P model calculated in another way. The measured profile of electrostatic potential for the pure ice-water interface decreases towards the liquid bulk region, which is in agreement with simulations of preferential direction of motion of Li+^{+} and F^{-} solute ions at the liquid side of the ice-water interface. These results are discussed in connection with the Workman-Reynolds effect.Comment: 7 pages, 5 figure

    Not Guilty

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    Second Place, Short Story Division, 1945 Butler Literary Contest The courtroom was lighted with a bright, blinding flash. The twelve selected ministers of the jury, representing all religious denominations, stared solemnly at the defendant who sat in the seat of judgment. With flrm straight lips but in a manner not Unkind, the foreman arose, and said the jury was ready to hear the evidence. The defendant, a sailor with an oil-soaked uniform that showed spots of blood on his shoulders and chest, stood and faced the jury

    Поглинання телекомунікаційною системою автоматизованих інформаційно-пошукових підсистем про транспортні засоби як умова поліпшення якості роботи працівників НЦБ Інтерполу в Україні

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    (uk) У статті з’ясовується необхідність скорочення кількості баз даних по перевірці транспортних засобів та формування відповідного законодавчого підґрунтя. Розмежування баз даних у їх значущості як по горизонталі, так і по вертикалі діючих норм права не тільки позитивно вплине на дослідження діяльності працівника РА НЦБ Інтерполу, спрямованої на протидію злочинам, пов’язаним з транспортними засобами, але й підвищить якість їх роботи.(en) Need o f the reduction amount database opens in article on checking the transport facilities and shaping corresponding to legislative foundation. Distribution database upon their importance as horizontally so and vertically acting rates o f the right will positively influence upon studies of activity workman Interpol in Ukraine, besides perfect quality o f their work directed on reluctance o f criminality connected with transport facility
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