418 research outputs found

    Die schiefe axonometrische Projektion

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    Bei axonometrischen Projektionen wird ein System von drei gleich langen von einem Punkt (Scheitel) ausgehenden auf einander rechtwinklig stehenden Strahlen (Axen) zu Grund gelegt. Nennen wir mit Steiner ein solches System Dreibein, so ergeben sich folgende drei Hauptaufgaben : 1) Aus der Lage des Dreibeins gegen die Projektionsebene und aus der Projektionsrichtung die Projektion des Dreikants zu bestimmen. 2) Aus des Projektion des Dreibeins die Lage desselben gegen die Projektionsebene , seine Grösse und die Projektionsrichtiing zu bestimmen. 3) Zu untersuchen, wie viele reelle Dreibeine einer beliebig angenommenen Projektion entsprechen. Indem wir uns vorsetzen, diese drei Aufgaben zu lösen, behandeln wir zunächst ..

    On asymptotic constants related to products of Bernoulli numbers and factorials

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    We discuss the asymptotic expansions of certain products of Bernoulli numbers and factorials, e.g., ν=1nB2νandν=1n(kν)!νrasn \prod_{\nu=1}^n |B_{2\nu}| \quad \text{and} \quad \prod_{\nu=1}^n (k \nu)!^{\nu^r} \quad \text{as} \quad n \to \infty for integers k1k \geq 1 and r0r \geq 0. Our main interest is to determine exact expressions, in terms of known constants, for the asymptotic constants of these expansions and to show some relations among them.Comment: 22 pages, final revised versio

    Structure and function of RNA Polymerase II-Bye1 complexes

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    A Management Framework for Secure Multiparty Computation in Dynamic Environments

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    Secure multiparty computation (SMC) is a promising technology for privacy-preserving collaborative computation. In the last years several feasibility studies have shown its practical applicability in different fields. However, it is recognized that administration and management overhead of SMC solutions are still a problem. A vital next step is the incorporation of SMC in the emerging fields of the Internet of Things and (smart) dynamic environments. In these settings, the properties of these contexts make utilization of SMC even more challenging since some of its vital premises regarding environmental stability and preliminary configuration are not initially fulfilled. We bridge this gap by providing FlexSMC, a management and orchestration framework for SMC which supports the discovery of nodes, supports a trust establishment between them and realizes robustness of SMC session by handling nodes failures and communication interruptions. The practical evaluation of FlexSMC shows that it enables the application of SMC in dynamic environments with reasonable performance penalties and computation durations allowing soft real-time and interactive use cases
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