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- Initial allocation compensation algorithm for redundancy allocation: The scanning heuristic
- 1. Introduction The manufacturing yield and operating reliability of a complex system can be enhanced with three main approaches: i adding redundancies to vulnerable components; ii increasing the robustness of the weak components themselves; and iii simplifying the system configuration (Kuoet al., 2001; Ha and Kuo, 2005). Among the...
- Research articles 2008-07-01
- Improving equipment management using lessons learned from the air force spares management process
- Introduction For the last two years, and under the direction of the Warner Robins Equipment Management Office (542d MSUG/ GBMM), the Air Force has improved its equipment management process, developing automated tools that have improved the equipment requirement methods and execution of logistics decisions, such as buy, repair, distribute,...
- Research articles 2006-06-22
- Montage Version 3.0
- The final version (3.0) of the Montage software has been released. To recapitulate from previous NASA Tech Briefs articles about Montage: This software generates custom, science-grade mosaics of astronomical images on demand from input files that comply with the Flexible Image Transport System FITS standard and contain image data registered...
- Research articles 2006-03-01
- Self-adapting numerical software (SANS) effort
- The challenge for the development of next-generation software is the successful management of the complex computational environment while delivering to the scientist the full power of flexible compositions of the available algorithmic alternatives. Selfadapting numerical software SANS systems are intended to meet this significant challenge. The process of arriving at...
- Research articles 2006-03-01
- Taylor: 'crop prospects not reduced'.
- Iowa State University Extension Climatologist Elwynn Taylor has built a strong reputation of keeping crop stresses in perspective--he rarely adjusts a yield outlook until the time is right. That's why his June 22 update was titled, "Crop prospects not reduced, yet." He...
- Research articles 2005-06-25
- Real-Time Principal-Component Analysis
- A recently written computer program implements dominant-element-based gradient descent and dynamic initial learning rate DOGEDYN, which was described in "Method of Real-Time Principal-Component Analysis" (NPO-40034) NASA Tech Briefs, Vol. 29, No. 1 (January 2005), page 59. To recapitulate: DOGEDYN is a method of sequential principal-component analysis PCA suitable for such...
- Research articles 2005-06-01
- Optical diffraction in close proximity to plane apertures. III. Modified, self-consistent theory
- The classical theory of diffraction at plane apertures illuminated by normally incident light is modified so that diffraction on the source side of the screen is taken into consideration and the energy transport across the aperture plane is described by continuous functions. The modified field expressions involve the sums and...
- Research articles 2004-09-01
- Financial Websites as Financial Advisors
- online resources Comparing Returns on Equity Found on the Internet Return on equity ROE provides a useful indication of how well managers are employing the funds invested by the firm's shareholders to generate returns. Recent research suggests that in the long run the value of a...
- Research articles 2004-02-01
- REG-133791-02 and REG-105606-99
- Notice of Proposed Rulemaking; Notice of Public Hearing; and Withdrawal of Previously Proposed RegulationsCredit for Increasing Research ActivitiesAGENCY: Internal Revenue Service IRS, Treasury.ACTION: Notice of proposed rulemaking; notice of public hearing; and withdrawal of previously proposed regulations.SUMMARY: This document contains proposed regulations relating to the computation and allocation of the...
- Research articles 2003-09-02
- Researchers develop techniques for computing Google-style web rankings up to five times faster; Speed-up may make "topic-sensitive" page rankings feasible.
- M2 PRESSWIRE-13 May 2003-US NSF: Researchers develop techniques for computing Google-style web rankings up to five times faster; Speed-up may make "topic-sensitive" page rankings feasibleC1994-2003 M2 COMMUNICATIONS LTD RDATE:05132003 ARLINGTON, Va. -- Computer science researchers at Stanford University have developed...
- Research articles 2003-05-13
- Accelerating scientific discovery through computation and visualization II
- This is the second in a series of articles describing a wide variety of projects at NIST that synergistically combine physical science and information science. It describes, through examples, how the Scientific Applications and Visualization Group SAVG at NIST has utilized high performance parallel computing, visualization, and machine learning to...
- Research articles 2002-05-01
- EDAP TMS S.A. Reports 2001 Fourth Quarter & Year End Financial Results
- Business Editors/Health & Medical Writers VAULX-EN-VELIN, France--BW HealthWire--March 13, 2002 EDAP TMS S.A. (Nasdaq and Nasdaq Europe: EDAP)-- Net Sales Up 7% Compared to the Prior Year Period and 26% Sequentially Shareholder's Equity Equals EUR 4.90 (USD 4.36) Per Share EDAP TMS S.A. (Nasdaq...
- Research articles 2002-03-13
- Novel computation enables best-yet estimate of ground state of neutral helium - News Briefs - Brief Article
- A NIST scientist, in collaboration with Indiana University, has computed the nonrelativistic energy for the ground [S.sup.1] state of neutral helium to be -2.9037 2437 7034 1195 9829 99 a.u. This represents the highest accuracy computation of this quantity to date. Comparisons with other calculations and an energy extrapolation yield...
- Research articles 2002-01-01
- Modern Mathematical Methods for Physicists and Engineers.(book publishing)(Brief Article)
- Modern Mathematical Methods for Physicists and Engineers. C. D. Cantrell. Cambridge University Press, 40 W. 20th St., New York, NY 10011-4211. 2000. 763 pp. ISBN 0-521-59827-3. $49.95 paperback. The author begins with a review of computation, and then deals with a range of key...
- Research articles 2001-08-01
- Golf, odds and competition
- Next Monday morning the stock market will, in all likelihood, go up. If you've got $11 that you can put at risk to make $10, bet on Tiger this weekend. As most of us know, the United States Open golf championship comes to Oklahoma this week....
- Research articles 2001-06-12
- Report on the Development of the Advanced Encryption Standard - AES
- In 1997, the National Institute of Standards and Technology NIST initiated a process to select a symmetric-key encryption algorithm to be used to protect sensitive unclassified Federal information in furtherance of NIST's statutory responsibilities. In 1998, NIST announced the acceptance of 15 candidate algorithms and requested the assistance of the...
- Research articles 2001-05-01
- Mathematics and measurement
- In this paper we describe the role that mathematics plays in measurement science at NIST. We first survey the history behind NIST's current work in this area, starting with the NBS Math Tables project of the l930s. We then provide examples of more recent efforts in the application of mathematics...
- Research articles 2001-01-01
- Accelerating Scientific Discovery Through Computation and Visualization
- The rate of scientific discovery can be accelerated through computation and visualization. This acceleration results from the synergy of expertise, computing tools, and hardware for enabling high performance computation, information science, and visualization that is provided by a team of computation and visualization scientists collaborating in a peer-to. peer...
- Research articles 2000-11-01
- RUSLE for mining, construction and reclamation lands.(Revised Universal Soil Loss Equation)
- The Revised Universal Soil Loss Equation RUSLE is a practical and increasingly popular choice to provide soil-loss estimates in the preparation of environmental impact assessments, reclamation plans, and post-reclamation site evaluations for land subjected to mining and construction. A factor-by-factor comparison of the Universal Soil Loss Equation USLE and RUSLE...
- Research articles 1999-03-22
- A Quantitative Model-Independent Method for Global Sensitivity Analysis of Model Output.(Statistical Data Included)
- A new method for sensitivity analysis SA of model output is introduced. It is based on the Fourier amplitude sensitivity test FAST and allows the computation of the total contribution of each input factor to the output's variance. The term "total" here means that the factor's...
- Research articles 1999-02-01
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