Raketen, Russland, Rücksichtnahmen: Russland-Apologetik als Leitlinie deutscher Sicherheitspolitik?

"Kürzlich erschien im Rahmen der DGAPstandpunkte der Beitrag von Frank Elbe und Ulrich Weisser über den 'Raketenstreit', der vornehmlich zwischen Russland und den USA ausgetragen wird, aber auch zu Unfrieden zwischen den europäischen NATO-Verbündeten führt. Die dort geäußerten Auffassungen unterzieht der Autor, Senior Political Advisor in der Politischen Planungseinheit des NATO-Generalsekretärs, im Folgenden einer kritischen Prüfung." (Autorenreferat

Applying a linked data compliant model: The usage of the Europeana Data Model by the Deutsche Digitale Bibliothek

In 2013/14 the Deutsche Digitale Bibliothek (DDB) switched its data model from the CIDOC conceptual reference model to the Europeana Data Model (EDM). This decision was taken on the background of two major mandates the DDB has to fulfill: The DDB is as a portal and a platform providing access to digital objects from German cultural heritage and research institutions. On the other hand the DDB aims to become the German aggregator for Europeana. Using EDM as the internal DDB data model was approved as the most reasonable solution to meet these challenges. The DDB uses the model for all portal functions that require semantic links between metadata (search facets, hierarchies, links between authority files and digital objects). The application of EDM for the DDB portal raised some difficulties since not all necessary classes and properties were entirely implemented in Europeana-EDM at that time. Therefore, a DDB-EDM application profile was developed. The DDB publishes metadata under the CC0 Public Domain Dedication license in EDM-RDF/XML via an OAI-PMH interface to serve Europeana and also via an Application Programming Interface (API) for external users to develop new applications on the basis of metadata harmonized by the DDB

Implementing MPI with Optimized Algorithms for Metacomputing

This paper presents an implementation of the Message Passing Interface called PACX-MPI. The major goal of the library is to support heterogeneous metacomputing for MPI applications by clustering MPP's and PVP's. The key concept of the library is a daemon-concept. We will focus in this paper on two aspects of this library. First we will show the importance of the usage of optimized algorithms for the global operations in such a metacomputing environment. And second we want to discuss whether we introduce a bottleneck by using daemon-nodes for the external communication. Keywords--- MPI, Metacomputing, Global Operations I. Why another MPI - Implementation ? In the last couple of years a large number of tools and libraries have been developed to enable the coupling of computational resources, which may be distributed all over the world [5], [6], [8], [9], [12],[13]. The goal of such projects is usually to solve problems on a cluster of machines which cannot be solved by using a single M..

Effective substrate potentials with quasicrystalline symmetry depend on the size of the adsorbed particles

We explore the effective potential landscapes that extended particles experience when adsorbed on the surface of quasicrystals. Commonly, these are solids with long-ranged order but no translational symmetry. The effective potentials significantly depend on the size of the adsorbed particles. We show how changing the particle radius changes the so-called local isomorphism class of the effective quasicrystalline pattern. This means effective potentials for different particle sizes cannot directly be mapped onto each other. Our theoretical predictions are confirmed by Monte Carlo simulations. The results are important for colloidal particles with different sizes that are subjected to laser fields with quasicrystalline symmetry as well as for systems where extended molecules are deposited onto the surface of metallic quasicrystals