100,504 research outputs found
La France vue d'Allemagne : Pletsch A., Frankreich
No full textBoyer Jean-Claude. La France vue d'Allemagne : Pletsch A., Frankreich. In: Annales de Géographie, t. 107, n°599, 1998. pp. 105-106
Une géographie de Paris au second degré : Alfred Pletsch (Hrsg.), Paris im Wandel
No full textRiquet Pierre. Une géographie de Paris au second degré : Alfred Pletsch (Hrsg.), Paris im Wandel . In: Annales de Géographie, t. 99, n°556, 1990. p. 734
Une géographie de Paris au second degré : Alfred Pletsch (Hrsg.), Paris im Wandel
No full textRiquet Pierre. Une géographie de Paris au second degré : Alfred Pletsch (Hrsg.), Paris im Wandel . In: Annales de Géographie, t. 99, n°556, 1990. p. 734
Une oasis du Sahara du Nord : A. Pletsch, Structurwandlung in der Oase Dra. Untersuchungen zur Wirtschafts - und Bevölkerungsentwicklung im Oasen gebiet Südmarokkos
No full textMainguet Monique. Une oasis du Sahara du Nord : A. Pletsch, Structurwandlung in der Oase Dra. Untersuchungen zur Wirtschafts - und Bevölkerungsentwicklung im Oasen gebiet Südmarokkos. In: Annales de Géographie, t. 82, n°451, 1973. pp. 367-368
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
Heterogeneous and tissue-specific regulation of effector T cell responses by IFN-gamma during Plasmodium berghei ANKA infection.
No full textIFN-γ and T cells are both required for the development of experimental cerebral malaria during Plasmodium berghei ANKA infection. Surprisingly, however, the role of IFN-γ in shaping the effector CD4(+) and CD8(+) T cell response during this infection has not been examined in detail. To address this, we have compared the effector T cell responses in wild-type and IFN-γ(-/-) mice during P. berghei ANKA infection. The expansion of splenic CD4(+) and CD8(+) T cells during P. berghei ANKA infection was unaffected by the absence of IFN-γ, but the contraction phase of the T cell response was significantly attenuated. Splenic T cell activation and effector function were essentially normal in IFN-γ(-/-) mice; however, the migration to, and accumulation of, effector CD4(+) and CD8(+) T cells in the lung, liver, and brain was altered in IFN-γ(-/-) mice. Interestingly, activation and accumulation of T cells in various nonlymphoid organs was differently affected by lack of IFN-γ, suggesting that IFN-γ influences T cell effector function to varying levels in different anatomical locations. Importantly, control of splenic T cell numbers during P. berghei ANKA infection depended on active IFN-γ-dependent environmental signals--leading to T cell apoptosis--rather than upon intrinsic alterations in T cell programming. To our knowledge, this is the first study to fully investigate the role of IFN-γ in modulating T cell function during P. berghei ANKA infection and reveals that IFN-γ is required for efficient contraction of the pool of activated T cells
Thermal alteration of terrestrial palynomorphs in mid-Cretaceous organic-rich mudstones intruded by igneous sill (Newfoundland Margin, ODP Hole 1276A)
No full textMost approaches used to reconstruct thermal alteration of sediments necessitate advanced, relatively expensive analytical techniques. We have evaluated the fidelity of a less costly, relatively simple approach of visually assessing sporomorph colours to determine thermal alteration. The sporomorph-based thermal alteration estimates were compared to vitrinite reflectance data from the same samples. As study material, we selected a succession of mid-Cretaceous (Albian) organic-rich clay- and siltstones intruded by a diabase sill that was recovered from Ocean Drilling Program (ODP) Hole 1276A, off Newfoundland. Six sporomorph groups (SG), each consisting of morphologically well-defined, easily identifiable constituents with long stratigraphic ranges, were individually evaluated for their thermal alteration signals. These groups are: (1) leiotrilete spores of the genera Biretisporites, Cyathidites, Deltoidospora, Dictyophyllidites, Gleicheniidites, and Leiotriletes (SG-1; subdivided into three subgroups SG-1a, SG-1b and SG-1c with sporoderm thicknesses <1 ?m, 1–1.5 ?m and >1.5 ?m, respectively); (2) trilete, rugulate spores of the genera Camerozonosporites and Lycopodiacidites (SG-2); (3) trilete, striate spores of the genera Appendicisporites, Cicatricosisporites and Plicatella (SG-3); and (4) the gymnosperm-pollen taxon Classopollis torosus (SG-4). Sporomorph colours were determined using Munsell colour standards under reproducible optical conditions. To minimize the potential influence of reworked specimens on the dataset, only the lightest 50% of all counted specimens per sporomorph group were evaluated for their
thermal alteration signals.
The thermal alteration estimates from all sporomorph groups yield an internally consistent picture that is compatible with vitrinite reflectance data from the same samples. They indicate that downhole thermal alteration does not increase until 20 m above the igneous sill. A steep rise occurs only at 4.23 m above the sill, and thermal alteration peaks in the sample closest (2.17 m) to the sill. However, the different sporomorph groups exhibit varying degrees of fidelity with respect to deciphering thermal alteration. Factors influencing the precision of the thermal alteration signal include sporoderm thickness, character of surface ornamentation, resistance to reworking, and abundance in the sample material. Highest correlations with vitrinite reflectance data are observed for the thermal alteration values from SG-1b (R=0.82), SG-3 (R=0.80) and SG-4 (R=0.80). Hence, these groups are best suited for a sporomorph-based approach to reconstructing the thermal history of sediments. The highest correlation coefficient with vitrinite reflectance data is registered for SG-1b, the subgroup with the least variability of sporoderm thickness and the highest abundance in the sample material. This indicates that the study of morphologically similar, highly abundant specimens with strongly constrained sporoderm thickness variations yields the best results for the reconstruction of thermal alteration
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Pelevin’s Trinity in the novel “t”: author – protagonist – reader
No full textThe article attempts to interpret Pelevin's artistic strategy in the novel "T" by exploring its subject organization and addressing the key problems of the author, the protagonist, and the reader as they are seen by the researcher. The article analyzes the peculiarities of constructing the narrative reality in the novel "T", and goes on to discuss Pelevin's philosophic models of the development of the humankind, and the emergence of his new anthropology
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