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  • Communications and Radar  (4)
  • Computer Systems  (2)
  • Keywords. Trifluoromethylindolocarbazole; Cyclic N-benzylindole tetramer; N-Benzyltetraindolyltrimethane; X-Ray crystallographic analysis.  (1)
  • Chemistry
  • Fluid Mechanics and Heat Transfer
  • Stress
  • Subduction zone
  • 1995-1999  (7)
  • 1970-1974
  • 1925-1929
  • 1999  (7)
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  • 1995-1999  (7)
  • 1970-1974
  • 1925-1929
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  • 1
    ISSN: 1434-4475
    Schlagwort(e): Keywords. Trifluoromethylindolocarbazole; Cyclic N-benzylindole tetramer; N-Benzyltetraindolyltrimethane; X-Ray crystallographic analysis.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung.  5,11-Dihydro-5,11-dibenzyl-6-trifluormethylindolo[3,2-b]carbazol (6) und das cyclische N-Benzylindoltrimer 4 wurden aus N-Benzylindol-3-methanol (1) und N,N′-Dibenzyl-3,3′-diindolylmethan (2) durch Behandeln mit Trifluoracetanhydrid synthetisiert. Ersteres ergab auch das36-gliedrige cyclische N-Benzylindoltetramer 7, letzteres N-Benzyl-3-trifluoracetylindol (8). Erhitzen von 1 in wässrigem Methanol führte zum Trimer 4– zusammen mit 2, dem N-Benzyltriindolylmethan 3 und dem N-Benzyl-tetraindolyltrimethan 5, für welches Struktur und Konformation imfesten Zustand durch Röntgenstrukturanalyse abgeleitet wurden. Die Resultate werden diskutiert, und plausible Mechanismen für die Reaktionen, die zu den Verbindungen 3–8 führen, werden vorgestellt.
    Notizen: Summary.  5,11-Dihydro-5,11-dibenzyl-6-trifluoromethylindolo[3,2-b]carbazole (6) and the cyclic N-benzylindole trimer 4 were synthesized from both N-benzylindole-3-methanol (1) and N,N′-dibenzyl-3,3′-diindolylmethane (2) by treatment with trifluoroacetic anhydride. The former also gave the 36-membered cyclic N-benzylindole tetramer 7, and the latter furnished N-benzyl-3-trifluoroacetylindole (8). Heating 1 in aqueous methanol also yielded the trimer 4 along with 2, the N-benzylitriindolyldimethane 3, and the N-benzyltetraindolyltrimethane 5 whose structure and solid-state conformation were determined by X-ray crystallographic analysis. The results are discussed and plausible mechanisms of the reactions leading to 3–8 are presented.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2018-06-08
    Beschreibung: The Optical Communications Demonstrator (OCD) is a laboratory based lasercom terminal that was developed to validate several key technologies such as precision beam pointing, high bandwidth beacon tracking and beacon acquisition.
    Schlagwort(e): Communications and Radar
    Materialart: International Society for Optical Engineering (SPIE) - Laser Communications Technologies; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2018-06-08
    Beschreibung: This paper presents an overview of the preliminary design of both the flight and ground systems of the Optical Communication Demonstration and High-Rate Link Facility which will demonstrate optical communication from the International Space Station to ground after its deployment in October 2002.
    Schlagwort(e): Communications and Radar
    Materialart: International Society for Optical Engineering (SPIE), Free-Space Optical Communication; San Jose, CA; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    Unbekannt
    In:  Other Sources
    Publikationsdatum: 2018-06-08
    Schlagwort(e): Communications and Radar
    Materialart: Diode Laser Technology Review; FL; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2018-06-08
    Beschreibung: Introduction to free space optical communications.
    Schlagwort(e): Communications and Radar
    Materialart: DESCANSO Symposium; Pasadena, CA; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Publikationsdatum: 2019-07-13
    Beschreibung: Classical mesh partitioning algorithms were designed for rather static situations, and their straightforward application in a dynamical framework may lead to unsatisfactory results, e.g., excessive data migration among processors. Furthermore, special attention should be paid to their amenability to parallelization. In this paper, a novel parallel method for the dynamic partitioning of adaptive unstructured meshes is described. It is based on a linear representation of the mesh using self-avoiding walks.
    Schlagwort(e): Computer Systems
    Materialart: IPPS''99; Apr 12, 1999 - Apr 16, 1999; San Juan; Puerto Rico
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Publikationsdatum: 2019-07-13
    Beschreibung: The success of parallel computing in solving real-life computationally-intensive problems relies on their efficient mapping and execution on large-scale multiprocessor architectures. Many important applications are both unstructured and dynamic in nature, making their efficient parallel implementation a daunting task. This paper presents the parallelization of a dynamic unstructured mesh adaptation algorithm using three popular programming paradigms on three leading supercomputers. We examine an MPI message-passing implementation on the Cray T3E and the SGI Origin2OOO, a shared-memory implementation using cache coherent nonuniform memory access (CC-NUMA) of the Origin2OOO, and a multi-threaded version on the newly-released Tera Multi-threaded Architecture (MTA). We compare several critical factors of this parallel code development, including runtime, scalability, programmability, and memory overhead. Our overall results demonstrate that multi-threaded systems offer tremendous potential for quickly and efficiently solving some of the most challenging real-life problems on parallel computers.
    Schlagwort(e): Computer Systems
    Materialart: Supercomputing; Nov 13, 1999 - Nov 19, 1999; Portland, OR; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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