736 research outputs found

    Aerospace medicine and biology. A continuing bibliography with indexes, supplement 195

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    This bibliography lists 148 reports, articles, and other documents introduced into the NASA scientific and technical information system in June 1979

    Data bases and data base systems related to NASA's aerospace program. A bibliography with indexes

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    This bibliography lists 1778 reports, articles, and other documents introduced into the NASA scientific and technical information system, 1975 through 1980

    Quarterly literature review of the remote sensing of natural resources

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    The Technology Application Center reviewed abstracted literature sources, and selected document data and data gathering techniques which were performed or obtained remotely from space, aircraft or groundbased stations. All of the documentation was related to remote sensing sensors or the remote sensing of the natural resources. Sensors were primarily those operating within the 10 to the minus 8 power to 1 meter wavelength band. Included are NASA Tech Briefs, ARAC Industrial Applications Reports, U.S. Navy Technical Reports, U.S. Patent reports, and other technical articles and reports

    Application of mixed model methodology to the evaluation of performance tested boars

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    Alternative designs applicable to the estimation of breeding values of performance tested boars using mixed model methodology were simulated and evaluated. Designs were based on composite estimates of parameters from the literature and results from a survey of central swine testing station managers in the United States. Of interest were the evaluations for the traits average daily gain and backfat probe. Family size, number of families per test, degree of relationship among animals within and across tests, and strength of genetic ties across tests were varied to determine how changes in one affected the others, as well as how they interacted with each other. The criterion upon which comparisons were based was accuracy, the correlation of true and estimated breeding values (r(,uu) = SQRT.(1 - V(u-u)/(sigma)(,G)(\u272) )). The prediction error variance V(u-u) is obtained from the inverse of the coefficient matrix of the mixed model equations. The single-trait animal model was assumed to be y(,ij) = s(,i) + b(,ij) + e(,ij), where y(,ij) was the observation (average daily gain or backfat) on the j(\u27th) boar in the i(\u27th) station-season, s(,i) was the fixed effect due to the i(\u27th) station-season, b(,ij) was the random effect due to the j(\u27th) boar in the i(\u27th) station-season and e(,ij) was the random residual error associated with the observation on the j(\u27th) boar in the i(\u27th) station-season. Small subclass numbers in conjunction with evaluation of closely related families caused average accuracy to decrease instead of increase because directly tied animals were less accurately evaluated. Designing the relationship matrix by requiring entry of specific relatives would help to correct the problem. Tying station-seasons together through the relationship matrix formed a large set of interdependent equations and improved the average accuracy of predicted breeding values, since the slight decrease in accuracy for directly tied animals was more than offset by the increase for their test mates. Full-sibs across stations provided the strongest genetic tie, while the traditional half-sib (sire) tie was 1/4 as strong as the full-sib tie. Half-cousin ties were the weakest investigated (1/64 as large as full-sib ties), but could allow more genetic progress by increasing the selection differential. Applications of findings to the swine industry were discussed

    Aerospace Medicine and Biology: A continuing bibliography (supplement 160)

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    This bibliography lists 166 reports, articles, and other documents introduced into the NASA scientific and technical information system in October 1976

    Aeronautical Engineering: A special bibliography, supplement 60

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    This bibliography lists 284 reports, articles, and other documents introduced into the NASA scientific and technical information system in July 1975

    Aeronautical engineering: A continuing bibliography with indexes (supplement 322)

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    This bibliography lists 719 reports, articles, and other documents introduced into the NASA scientific and technical information system in Oct. 1995. Subject coverage includes: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment, and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics

    Automated Detection of Electric Energy Consumption Load Profile Patterns

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    [EN] Load profiles of energy consumption from smart meters are becoming more and more available, and the amount of data to analyse is huge. In order to automate this analysis, the application of state-of-the-art data mining techniques for time series analysis is reviewed. In particular, the use of dynamic clustering techniques to obtain and visualise temporal patterns characterising the users of electrical energy is deeply studied. The performed review can be used as a guide for those interested in the automatic analysis and groups of behaviour detection within load profile databases. Additionally, a selection of dynamic clustering algorithms have been implemented and the performances compared using an available electric energy consumption load profile database. The results allow experts to easily evaluate how users consume energy, to assess trends and to predict future scenarios.The data analysed has been facilitated by the Spanish Distributor Iberdrola Electrical Distribution S.A. as part of the research project GAD (Active Management of the Demand), national project by DEVISE 2010 funded by the INGENIIO 2010 program and the CDTI (Centre for Industrial Technology Development), Business Public Entity dependent of the Ministry of Economy and Competitiveness of the Government of Spain.Benítez, I.; Diez, J. (2022). Automated Detection of Electric Energy Consumption Load Profile Patterns. Energies. 15(6):1-26. https://doi.org/10.3390/en1506217612615

    Aeronautical engineering: A continuing bibliography with indexes (supplement 289)

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    This bibliography lists 792 reports, articles, and other documents introduced into the NASA scientific and technical information system in Mar. 1993. Subject coverage includes: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment, and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics

    An extensive English language bibliography on graph theory and its applications

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    Bibliography on graph theory and its application
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