253 research outputs found

    The role of verification in international relations: 1945-1993

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    The role of verification in international relations is liked with the urge to verify which is evident throughout human history. This study focused on the evolution of this role in light of political circumstances and technological progress. Several different approaches to verification can be identified – bilateral, regional cooperation, global arrangements, and individual national efforts. Moreover, several themes characterize the existing verification regimes. These issues – namely the sharing of intelligence, managing compliance questions, and the integration of different regimes – present themselves as the negotiating ground for future years. One of the important result of the paper is that it demonstrates how the concept of verification, once a contentious political instrument, is encompassing anew actors, new frameworks, new technologies, and new fields

    Frank Höhler, Thomas Kläber, Jürgen Matschie, Luc Saalfeld - Aus einer anderen Welt: Bilder aus den 80er Jahren - Fotografie : 27. November bis 15. Januar 2014

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    Ausstellung kuratiert von Dr. Hans-Ulrich LehmannDie Ausstellungsbroschüren des „Projektraum am Weißen Hirsch. Galerie Grafikladen“ dokumentieren die Ausstellungstätigkeit eines nicht institutionellen Ausstellungsraumes in Dresden zwischen 2010 und 2016. Die Galerie widmete sich dem Werk zeitgenössischer junger Künstler, vorwiegend Meisterschüler und Absolventen, die in der Regel einen biografischen Bezug zu Dresden haben. Das Ausstellungskonzept war offen für die verschiedensten künstlerischen Ausdrucksformen – von Malerei über Fotografie bis zu performativen Ansätzen. Jährlich fanden vier bis fünf, von wechselnden Kuratoren entwickelte Ausstellungen statt. Im August 2016 eröffnete die vorerst letzte Ausstellung.© bei den Rechteinhabern, Lizenz: Zugang frei – Rechte vorbehalten. Bitte beachten Sie unsere Hinweise zum Urheberrecht

    New fossils from the Paleogene of central Libya illuminate the evolutionary history of endemic African anomaluroid rodents

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    Anomaluroid rodents show interesting biogeographic and macroevolutionary patterns, although their fossil record is meager and knowledge of the natural history of extant members of the clade remains inadequate. Living anomaluroids (Anomaluridae) are confined to equatorial parts of western and central Africa, but the oldest known fossil anomaluroid (Pondaungimys) comes from the late middle Eocene of Myanmar. The first appearance of anomaluroids in the African fossil record coincides with the first appearances of hystricognathous rodents and anthropoid primates there. Both of the latter taxa are widely acknowledged to have originated in Asia, suggesting that anomaluroids may show a concordant biogeographic pattern. Here we describe two new taxa of African Paleogene anomaluroids from sites in the Sirt Basin of central Libya. These include a new Eocene species of the nementchamyid genus Kabirmys, which ranks among the oldest African anomaluroids recovered to date, and a new genus and species of Anomaluridae from the early Oligocene, which appears to be closely related to extant Zenkerella, the only living non-volant anomalurid. Phylogenetic analyses incorporating the new Libyan fossils suggest that anomaluroids are not specially related to Zegdoumyidae, which are the only African rodents known to antedate the first appearance of anomaluroids there. The evolution of gliding locomotion in Anomaluridae appears to conflict with traditional assessments of relationships among living anomalurid taxa. If the historically accepted division of Anomaluridae into Anomalurinae (extant and Miocene Anomalurus and Miocene Paranomalurus) and Zenkerellinae (extant and Miocene Zenkerella and extant Idiurus) is correct, then either gliding locomotion evolved independently in Anomalurinae and Idiurus or non-volant Zenkerella evolved from a gliding ancestor. Anatomical data related to gliding in Anomaluridae are more consistent with a non-traditional systematic arrangement, whereby non-volant Zenkerella is the sister group of a clade including both Anomalurus and Idiurus

    The mammals of Angola

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    Scientific investigations on the mammals of Angola started over 150 years ago, but information remains scarce and scattered, with only one recent published account. Here we provide a synthesis of the mammals of Angola based on a thorough survey of primary and grey literature, as well as recent unpublished records. We present a short history of mammal research, and provide brief information on each species known to occur in the country. Particular attention is given to endemic and near endemic species. We also provide a zoogeographic outline and information on the conservation of Angolan mammals. We found confirmed records for 291 native species, most of which from the orders Rodentia (85), Chiroptera (73), Carnivora (39), and Cetartiodactyla (33). There is a large number of endemic and near endemic species, most of which are rodents or bats. The large diversity of species is favoured by the wide range of habitats with contrasting environmental conditions, while endemism tends to be associated with unique physiographic settings such as the Angolan Escarpment. The mammal fauna of Angola includes 2 Critically Endangered, 2 Endangered, 11 Vulnerable, and 14 Near-Threatened species at the global scale. There are also 12 data deficient species, most of which are endemics or near endemics to the countryinfo:eu-repo/semantics/publishedVersio

    Reconciling Apparent Conflicts between Mitochondrial and Nuclear Phylogenies in African Elephants

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    Conservation strategies for African elephants would be advanced by resolution of conflicting claims that they comprise one, two, three or four taxonomic groups, and by development of genetic markers that establish more incisively the provenance of confiscated ivory. We addressed these related issues by genotyping 555 elephants from across Africa with microsatellite markers, developing a method to identify those loci most effective at geographic assignment of elephants (or their ivory), and conducting novel analyses of continent-wide datasets of mitochondrial DNA. Results showed that nuclear genetic diversity was partitioned into two clusters, corresponding to African forest elephants (99.5% Cluster-1) and African savanna elephants (99.4% Cluster-2). Hybrid individuals were rare. In a comparison of basal forest “F” and savanna “S” mtDNA clade distributions to nuclear DNA partitions, forest elephant nuclear genotypes occurred only in populations in which S clade mtDNA was absent, suggesting that nuclear partitioning corresponds to the presence or absence of S clade mtDNA. We reanalyzed African elephant mtDNA sequences from 81 locales spanning the continent and discovered that S clade mtDNA was completely absent among elephants at all 30 sampled tropical forest locales. The distribution of savanna nuclear DNA and S clade mtDNA corresponded closely to range boundaries traditionally ascribed to the savanna elephant species based on habitat and morphology. Further, a reanalysis of nuclear genetic assignment results suggested that West African elephants do not comprise a distinct third species. Finally, we show that some DNA markers will be more useful than others for determining the geographic origins of illegal ivory. These findings resolve the apparent incongruence between mtDNA and nuclear genetic patterns that has confounded the taxonomy of African elephants, affirm the limitations of using mtDNA patterns to infer elephant systematics or population structure, and strongly support the existence of two elephant species in Africa

    Bericht \ufcber die April-Sitzung 1898 (desgl.)

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    Volume: 46Start Page: 498End Page: 49

    Bericht über die November-Sitzung 1903

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    Bericht über die Januarsitzung 1901

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    Bericht über die Oktober-Sitzung 1905

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    Bericht über die März-Sitzung 1905

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