51 research outputs found

    10481 Abstracts Collection -- Computational Counting

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    From November 28 to December 3 2010, the Dagstuhl Seminar 10481 ``Computational Counting\u27\u27 was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

    NASA Tech Briefs Index, 1976

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    Abstracts of new technology derived from the research and development activities of the National Aeronautics and Space Administration are presented. Emphasis is placed on information considered likely to be transferrable across industrial, regional, or disciplinary lines. Subject matter covered includes: electronic components and circuits; electronic systems; physical sciences; materials; life sciences; mechanics; machinery; fabrication technology; and mathematics and information sciences

    Definition of a near real time microbiological monitor for space vehicles

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    Efforts to identify the ideal candidate to serve as the biological monitor on the space station Freedom are discussed. The literature review, the evaluation scheme, descriptions of candidate monitors, experimental studies, test beds, and culture techniques are discussed. Particular attention is given to descriptions of five candidate monitors or monitoring techniques: laser light scattering, primary fluorescence, secondary fluorescence, the volatile product detector, and the surface acoustic wave detector

    Aeronautical engineering, a continuing bibliography with indexes (supplement 197)

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    This bibliography lists 488 reports, articles and other documents introduced into the NASA scientific and technical information system in January 1986

    Cumulative index to NASA Tech Briefs, 1986-1990, volumes 10-14

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    Tech Briefs are short announcements of new technology derived from the R&D activities of the National Aeronautics and Space Administration. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This cumulative index of Tech Briefs contains abstracts and four indexes (subject, personal author, originating center, and Tech Brief number) and covers the period 1986 to 1990. The abstract section is organized by the following subject categories: electronic components and circuits, electronic systems, physical sciences, materials, computer programs, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences

    Index to 1985 NASA Tech Briefs, volume 10, numbers 1-4

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    Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This index for 1985 Tech Briefs contains abstracts and four indexes: subject, personal author, originating center, and Tech Brief Number. The following areas are covered: electronic components and circuits, electronic systems, physical sciences, materials, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences

    Metal-Organic Frameworks and Covalent Organic Frameworks as single site catalysts for organic transformations

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    Els Metal-Organic frameworks (MOFs) i Covalent Organic Frameworks (COFs) són nous tipus de materials porosos que han atret una gran atenció a causa de la seva combinació única de propietats: alta porositat, bona estabilitat química, estructures ben ordenades i gran capacitat d'ajustament estructural. Entre les seves aplicacions possibles, la catàlisi és una de les més prometedores a causa del potencial dels MOFs i COFs per formar catalitzadors de centre únic que estan ben definits i romanen accessibles en estat sòlid. En aquesta línia de recerca, aquesta tesi té com a objectiu desenvolupar i estudiar nous catalitzadors basats en MOFs i COFs per a transformacions orgàniques. El treball presentat en aquesta tesi mostra un mètode simple per immobilitzar lligands de perilè fotocatalíticament actius dins de MOF-520, cosa que permet estudiar els lligands com a unitats aïllades i emprar els MOF com a fotocatalitzadors heterogenis per a l'acoblament reductiu d'enllaços C=O i C =N. Aquesta tesi també descriu la síntesi i caracterització d'una sèrie de COFs que porten lligands donadors de N a la seva estructura. La incorporació de Co a aquestes estructures va donar com a resultat MCOFs, que es van emprar com a catalitzadors d'hidroboració i borilació. Finalment, es van fer estudis per explorar la naturalesa de centre únic dels centres catalítics. Aquest treball mostra el potencial de MOF i COF com a catalitzadors heterogenis eficients i reciclables per a transformacions orgàniques i aplana el camí per al desenvolupament de nous sistemes catalítics de centre únic.Los Metal-Organic frameworks (MOFs) y Covalent Organic Frameworks (COFs) son nuevos tipos de materiales porosos que han atraído una gran atención debido a su combinación única de propiedades: alta porosidad, buena estabilidad química, estructuras bien ordenadas y gran capacidad de ajuste estructural. Entre sus muchas aplicaciones posibles, la catálisis es una de las más prometedoras debido al potencial de MOFs y COFs para formar catalizadores de centro único que estén bien definidos y permanezcan accesibles en estado sólido. En esta línea de investigación, la presente tesis tiene como objetivo desarrollar y estudiar nuevos catalizadores basados en MOFs y COFs para transformaciones orgánicas. El trabajo presentado en esta tesis muestra un método simple para inmovilizar ligandos de perileno fotocatalíticamente activos dentro de MOF-520, lo que permite estudiar los ligandos como unidades aisladas y emplear los MOF como fotocatalizadores heterogéneos para el acoplamiento reductivo de enlaces C=O y C=N. Esta tesis también describe la síntesis y caracterización de una serie de COFs que portan ligandos donantes de N en su estructura. La incorporación de Co en estas estructuras dio como resultado MCOFs, que se emplearon como catalizadores de hidroboración y borilación. Finalmente, se realizaron estudios para explorar la naturaleza de centro único de los centros catalíticos. Este trabajo muestra el potencial de MOF y COF como catalizadores heterogéneos eficientes y reciclables para transformaciones orgánicas y allana el camino para el desarrollo de nuevos sistemas catalíticos de centro único.Metal-organic frameworks (MOFs) and Covalent Organic Frameworks (COFs) are new types of porous materials that have attracted great attention due to their unique combination of properties: high porosity, good chemical stability, well-ordered structures and great structural tuneability. Among their many possible applications, catalysis is one of the most promising due to the potential of MOFs and COFs to form single-site catalysts that are well defined and remain accessible in the solid state. In this line of research, the current thesis aims to develop and study new MOF and COF-based catalysts for organic transformations. The work presented in this thesis shows a simple method to immobilize photocatalytically active perylene ligands inside MOF-520, allowing this way to study the ligands as isolated units, and to employ the MOFs as heterogeneous photocatalysts for the reductive coupling of C=O and C=N bonds. This thesis also describes the synthesis and characterization of a series of COFs bearing N-donor ligands in their structure. Incorporation of Co into these structures resulted in MCOFs, which were employed as hydroboration and borylation catalysts. Finally, studies were performed to explore the single-site nature of the catalytic centers. This work showcases the potential of MOFs and COFs as efficient and recyclable heterogeneous catalysts for organic transformations, and paves the way for the development of new single-site catalytic systems

    Aeronautical enginnering: A cumulative index to a continuing bibliography (supplement 312)

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    This is a cumulative index to the abstracts contained in NASA SP-7037 (301) through NASA SP-7073 (311) of Aeronautical Engineering: A Continuing Bibliography. NASA SP-7037 and its supplements have been compiled by the Center for AeroSpace Information of the National Aeronautics and Space Administration (NASA). This cumulative index includes subject, personal author, corporate source, foreign technology, contract number, report number, and accession number indexes

    Quantum and stochastic processes

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