1,721,601 research outputs found
Nematic-isotropic phase coexistence in a Lebwohl-Lasher model binary liquid crystal mixture
No full textMonte Carlo computer simulations were used to investigate the phase behaviour of a Lebwohl-Lasher binary liquid-crystal mixture. A finite-size scaling analysis confirmed the first-order nature of the transition. The calculated nematic-isotopic phase coexistence region and the orientational order parameters for the two species along the phase boundary for a sample system were found to deviate significantly from those predicted by a mean-field theory. Increasing the difference between the isotropic components of the pair-potential of the two species resulted in a broadening of the coexistence region. (C) 1997 Elsevier Science B.V.PT: J; CR: BISCARINI F, 1991, MOL PHYS, V73, P439 CHEN S, 1992, PHYS REV LETT, V69, P1213 CLEAVER DJ, 1991, PHYS REV A, V43, P1918 CORVERA E, 1993, PHYS REV E, V47, P696 FABRI U, 1986, MOL PHYS, V58, P763 FERNANDEZ JF, 1997, PHYS REV E B, V55, P750 FERRENBERG AM, 1988, PHYS REV LETT, V61, P2635 GREEFF CW, 1994, PHYS REV E A, V49, P3225 HASHIM R, 1985, MOL PHYS, V56, P1217 HASHIM R, 1986, LIQ CRYST, V1, P133 HETZEL RE, 1992, PHYS REV LETT, V69, P518 LARADJI M, 1991, PHYS REV A, V44, P8184 LEBWOHL PA, 1973, PHYS REV A, V7, P2222 LEE JY, 1990, PHYS REV LETT, V65, P137 LEE JY, 1991, PHYS REV B, V43, P1268 LEE JY, 1991, PHYS REV B, V43, P3265 LEE JY, 1992, PHYS REV B, V46, P11190 LUCKHURST GR, 1982, CHEM PHYS, V73, P337 LUCKHURST GR, 1982, MOL PHYS, V47, P251 MAIER W, 1959, Z NATURFORSCH A, V14, P882 MAIER W, 1960, Z NATURFORSCH PT A, V15, P287 PALFFYMUHORAY P, 1985, MOL CRYST LIQ CRYST, V127, P301 RISBO J, 1995, J CHEM PHYS, V103, P3643 ZANNONI C, 1986, J CHEM PHYS, V84, P424 ZHANG LH, 1993, PHYTOTHER RES, V7, P217 ZHANG ZP, 1992, PHYS REV A, V45, P7560 ZHANG ZP, 1992, PHYS REV A, V46, P6707 ZHANG ZP, 1992, PHYS REV LETT, V69, P2803 ZHANG ZP, 1993, BIOCHIM BIOPHYS ACTA, V1147, P154 ZHANG ZP, 1993, MOL PHYS, V80, P1195 ZOLLWEG JA, 1992, PHYS REV B, V46, P11186; NR: 31; TC: 10; J9: CHEM PHYS LETT; PG: 5; GA: YP239Source type: Electronic(1
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Autosomal dominant myopathy with proximal weakness and early respiratory muscle involvement maps to chromosome 2q
No full textTwo Swedish families with autosomal dominant myopathy, who also had proximal weakness, early respiratory failure, and characteristic cytoplasmic bodies in the affected muscle biopsies, were screened for linkage by means of the human genome screening set (Cooperative Human Linkage Center Human Screening Set/Weber version 6). Most chromosome regions were completely excluded by linkage analysis (LOD score <-2). Linkage to the chromosomal region 2q24-q31 was established. A maximum combined two-point LOD score of 4.87 at a recombination fraction of 0 was obtained with marker D2S1245. Haplotype analysis indicated that the gene responsible for the disease is likely to be located in the 17-cM region between markers D2S2384 and D2S364. The affected individuals from these two families share an identical haplotype, which suggests a common origin
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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