100,518 research outputs found
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
FIGURE 1 continued. k. A. megalacantha subsp. megalacantha. l. A. pulcherrima. m. A. rivae. n. A. rugosifolia. o. A. schoelleri. p. A. sinana. q. A. steudneri. r. A. tewoldei. s. A. trichosantha subsp. trichosantha. t. A in Atlas of leaf surface micromorphology in Aloe L. (Asphodelaceae) from the Horn of Africa region
No full textFIGURE 1 continued. k. A. megalacantha subsp. megalacantha. l. A. pulcherrima. m. A. rivae. n. A. rugosifolia. o. A. schoelleri. p. A. sinana. q. A. steudneri. r. A. tewoldei. s. A. trichosantha subsp. trichosantha. t. A. trichosantha subsp. longiflora.Published as part of Fentaw, Eshetu, Elliott, Kelda F.V.A., Demissew, Sebsebe, Cutler, David & Grace, Olwen M., 2021, Atlas of leaf surface micromorphology in Aloe L. (Asphodelaceae) from the Horn of Africa region, pp. 261-282 in Phytotaxa 524 (4) on page 267, DOI: 10.11646/phytotaxa.524.4.3, http://zenodo.org/record/567297
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
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
Electrolytes and Interphases in Sodium-Based Rechargeable Batteries: Recent Advances and Perspectives
No full textFor sodium (Na)-rechargeable batteries to compete, and go beyond the currently prevailing Li-ion technologies, mastering the chemistry and accompanying phenomena is of supreme importance. Among the crucial components of the battery system, the electrolyte, which bridges the highly polarized positive and negative electrode materials, is arguably the most critical and indispensable of all. The electrolyte dictates the interfacial chemistry of the battery and the overall performance, having an influence over the practical capacity, rate capability (power), chemical/thermal stress (safety), and lifetime. In-depth knowledge of electrolyte properties provides invaluable information to improve the design, assembly, and operation of the battery. Thus, the full-scale appraisal of both tailored electrolytes and the concomitant interphases generated at the electrodes need to be prioritized. The deployment of large-format Na-based rechargeable batteries also necessitates systematic evaluation and detailed appraisal of the safety-related hazards of Na-based batteries. Hence, this review presents a comprehensive account of the progress, status, and prospect of various Na+-ion electrolytes, including solvents, salts and additives, their interphases and potential hazards
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
Measuring industry-science links through inventor-author relations: A profiling method
No full textIn this pilot study we examine the performance of text-based profiling in recovering a set of validated inventor-author links. In a first step we match patents and publications solely based on their similarity in content. Next, we compare inventor and author names on the highest ranked matches for the occurrence of name matches. Finally, we compare these candidate matches with the names listed in a validated set of inventor-author names. Our text-based profile methodology performs significantly better than a random matching of patents and publications, suggesting that text-based profiling is a valuable complementary tool to the name searches used in previous studies.innovation; industry-science links; text-based profiling;
The Politics of Famine in Ethiopia
No full textIn attempting to explain the causes of famine, the literature on famine points to different factors. This list of causes includes: drought; neo-Malthusian population growth; environmental degradation; limited technology; capitalist development, or the lack of it; the nature of the state, blamed either for lack of intervention or, on the contrary, for too much intervention; and, war.
However, to attempt to determine how causation of famine might be quantitatively apportioned between the different factors listed in the debates on causes of famine is of
limited value, precisely because the different factors that promote famine - drought, environmental degradation, economic decline, war - are inextricably intertwined and
interact with one another. Moreover, famine is not simply predetermined by the factors that the debate on causes itemizes. People's own actions and what people choose to do
also shapes the outcome and future strategies for survival.
The concern of this thesis is with famine in the case study areas, but our concern is not with debating the causes of famine as much as with identifying consequences. We
examine the effects of the array of forces on people's strategies for survival in the research areas during and after the drought and famine of the mid-1980's. We describe
the different strategies pursued by people in the study areas in the circumstances that existed during the drought and famine of the mid-1980's; and then discuss the
consequences of those actions for people's ability to recover and for people's future survival strategies.
The empirical data are based on two case studies carried out over a 6 month period from late October 1991 to end April 1992 in the Kallu area of southern Wollo. Wallo is the
province that was hit hardest by famine during 1984/5 and in 1972/4. In documenting the resource base in which people in the study areas sought to survive, our findings
challenge commonly held assumptions about the effects of the 1975 Land Reform, the nature of Peasant Associations, and the nature of gender relations. The findings on the
consequences of people's responses during the drought and famine of the mid-1980's indicate that we need to reconsider the issue of what is meant by the notion of 'coping', so central to much of the literature on famine survival strategies
Wave turbulence of a rotating array of quantized vortices in the T → 0 temperature limit
No full textThe dynamics of quantized vortices in the zero temperature limit is currently of great interest, particularly in the case of the Fermi superfluid He-B. Here we study wave turbulence, generated by the librating motion of a rotating cylindrical container filled with He-B, in the limit of vanishing viscous forces at temperatures . The polarization of the quantized vortices with respect to the axis of rotation is measured using non-invasive NMR techniques. We observe a decrease of the polarization when the librating motion is started, and a two-stage relaxation process when the modulation of the rotation velocity is stopped. The first relaxation process is associated with the dissipation of large-scale flow stored in inertial waves and the solid body rotation of the vortex array. From the decay of these energy reservoirs we determine the rate of energy dissipation of large-scale flow. The later second process is related to the relaxation of Kelvin waves on individual vortices. This process is monitored by the recovery of the polarization. The existence of a Kelvin wave cascade at the lowest temperatures is currently a central open question. We supply some evidence for the cascade
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