187,620 research outputs found
A superconducting magnetic lens for solar ray protection in manned interplanetary missions
No full textAbstract—During the interplanetary flights the crewmembers will be exposed to cosmic ray radiation (CR) with great risk for their health. The adsorbed dose due to CR depends on the galactic (GCR) or solar (SCR) origin. GCRs are isotropic and relatively high in energy and deliver a dose nearly constant. The SCRs are usually much less energetic, of the order of few tens of MeV but during some exceptional solar bursts, a great number of particles, mainly protons, are ejected at higher energies. In this case the dose delivered in a few hours by a solar burst inside a spacecraft can easily exceed 1 year cumulated dose by GCRs. The high-energy component of SCRs is quasidirectional so that a shielding system based on a superconducting magnetic lens (a toroid) can reduce the dose rate of SCRs to the level delivered by GCRs. This paper presents the concept, the general aspects and the main technical solutions that are adopted for this magnet. Index Terms—Superconducting coils, superconducting magnets in the space, superconducting toroids. I
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
The novel MAPT mutation K298E:mechanisms of mutant tau toxicity, brain pathology and tau expression in induced fibroblast-derived neurons
No full textFrontotemporal lobar degeneration (FTLD) is the one of the most frequent neurodegenerative disorders characterized by behavioral and executive impairment, language disorders and motor dysfunction. Hereditary forms of FTLD are frequently reported and about 20-30% of cases exhibit an autosomal dominant transmission. Microtubule associate protein tau (MAPT) gene mutations are associated with early onset FTLD. Here we have identified a new MAPT mutation on exon 10 that alters both the protein function and the RNA alternative splicing. Biochemical and neuropathological studies indicate a high pathogenicity of this new MAPT mutation. Moreover induced neurons transdifferentiated from patient skin-derived fibroblasts and carrying the new MAPT mutation express both 3R and 4R tau isoforms differently from those obtained from embryonic fibroblasts which express only 3R tau isoform indicating that they are not mature neurons
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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
Dr. Edward P. Wimberly, ITC, July 2011
No full textThis video is a conversation with Dr. Edward P. Wimberly. Dr. Wimberly talks about his book, "No Shame in Wesley's Gospel: A Twenty-First Century Pastoral Gospel". Brad Ost, AUC Woodruff Library, is the interviewer
Author Rights and Scholarly Publishing
No full textOriginally posted at
http://blog.library.gsu.edu/2014/10/24/author-rights-and-scholarly-publishing/</p
The decay scheme of the rho(1600) meson
No full textThe decay schema of the rho' (1600) meson is discusse
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