1,720,956 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Discontinuous molecular dynamics for semiflexible and rigid bodies
No full textA general framework for performing event-driven simulations of systems with semiflexible or rigid bodies interacting under impulsive forces is outlined. The method consists of specifying a means of computing the free evolution of constrained motion, evaluating the times at which interactions occur, and determining the consequences of interactions on subsequent motion. Algorithms for computing the times of interaction events and carrying out efficient event-driven simulations are discussed. The semiflexible case and the rigid case differ qualitatively in that the free motion of a rigid body can be computed analytically and need not be integrated numerically. (c) 2007 American Institute of Physics.PT: J; CR: ABRAMOWITZ M, 1965, HDB MATH FUNCTIONS F ALDER BJ, 1959, J CHEM PHYS, V31, P459 ALDER BJ, 1960, J CHEM PHYS, V33, P1439 ALLEN MP, 1987, COMPUTER SIMULATION ALLEN MP, 1989, COMPUT PHYS REP, V9, P301 ANDERSEN HC, 1983, J COMPUT PHYS, V52, P24 BARAFF D, 1989, COMPUT GRAPH, V23, P223 BARAFF D, 1992, THESIS CORNELL U BRENT RP, 1973, ALGORITHMS MINIMIZAT CARTER EA, 1989, CHEM PHYS LETT, V156, P472 CHAPELA GA, 1984, MOL PHYS, V53, P139 CHAPELA GA, 1989, CHEM PHYS, V129, P201 CICCOTTI G, 2004, J STAT PHYS, V115, P701 DELAPENA LH, UNPUB DELAPENA LH, 2005, J CHEM PHYS, V126 DEMICHELE C, 2006, J PHYS CHEM B, V110, P8064 DONEV A, 2005, J COMPUT PHYS, V202, P737 DONEV A, 2005, J COMPUT PHYS, V202, P765 ERPENBECK JJ, 1977, STAT MECH B FIXMAN M, 1974, P NATL ACAD SCI USA, V71, P3050 FRENKEL D, 2004, UNDERSTANDING MOL DY GALASSI M, 2005, GNU SCI LIB REFERENC GOLDSTEIN H, CLASSICAL MECH JACOBI CGJ, 1849, J CRELLE, V39, P293 KNOPP K, 1947, THEORY FUNCTIONS 2 LANDAU LD, 1976, MECHANICS LUBACHEVSKY BD, 1991, J COMPUT PHYS, V94, P255 MARIN M, 1993, J COMPUT PHYS, V109, P306 MARIN M, 1995, COMPUT PHYS COMMUN, V92, P214 MARSDEN JE, 2002, INTRO MECH SYMMETRY MASUTANI Y, 1994, P IEEE INT C ROB AUT, V2, P1066 MELCHIONNA S, 2000, PHYS REV E A, V61, P6165 MOSHIER SL, 1989, METHODS PROGRAMS MAT PRESS WH, 1992, NUMERICLA RECIPES FO RAMSHAW JD, 1986, PHYS LETT A, V116, P110 RAPAPORT DC, 1980, J COMPUT PHYS, V34, P184 RAPAPORT DC, 2004, ART MOL DYNAMICS SIM RUEB AS, 1834, THESIS UTRECHT NETHE RYCKAERT JP, 1977, J COMPUT PHYS, V23, P327 TUCKERMAN ME, 1999, EUROPHYS LETT, V45, P149 TUCKERMAN ME, 2001, J CHEM PHYS, V115, P1678 VANZON R, IN PRESS J COMPUT PH VANZON R, 2002, PHYS REV E 1, V65 WHITTAKER ET, 1937, TREATISE ANAL DYMANI; NR: 44; TC: 1; J9: J CHEM PHYS; PG: 13; GA: 138VLSource type: Electronic(1
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Discontinuous molecular dynamics for rigid bodies: Applications
No full textEvent-driven molecular dynamics simulations are carried out on two rigid-body systems which differ in the symmetry of their molecular mass distributions. First, simulations of methane in which the molecules interact via discontinuous potentials are compared with simulations in which the molecules interact through standard continuous Lennard-Jones potentials. It is shown that under similar conditions of temperature and pressure, the rigid discontinuous molecular dynamics method reproduces the essential dynamical and structural features found in continuous-potential simulations at both gas and liquid densities. Moreover, the discontinuous molecular dynamics approach is demonstrated to be between 3 and 100 times more efficient than the standard molecular dynamics method depending on the specific conditions of the simulation. The rigid discontinuous molecular dynamics method is also applied to a discontinuous-potential model of a liquid composed of rigid benzene molecules, and equilibrium and dynamical properties are shown to be in qualitative agreement with more detailed continuous-potential models of benzene. The few qualitative differences in the angular dynamics of the two models are related to the relatively crude treatment of variations in the discontinuous repulsive interactions as one benzene molecule rotates by another. (c) 2007 American Institute of Physics.PT: J; CR: ALDER BJ, 1959, J CHEM PHYS, V31, P459 BELLEMANS A, 1980, MOL PHYS, V39, P781 CACELLI I, 2004, J AM CHEM SOC, V126, P14278 CHAPELA GA, 1984, MOL PHYS, V53, P139 CHAPELA GA, 1989, CHEM PHYS, V129, P201 DELAPENA LH, 2007, J CHEM PHYS, V126 DEMICHELE C, 2006, J PHYS CHEM B, V110, P8064 DING F, 2003, PROTEINS, V53, P220 DUANE S, 1987, PHYS LETT B, V195, P216 DULLWEBER A, 1997, J CHEM PHYS, V107, P5840 FALCONE DR, 1967, J PHYS CHEM-US, V71, P2754 MACKERELL AD, 1998, J PHYS CHEM B, V102, P3586 NGUYEN HD, 2006, J AM CHEM SOC, V128, P1890 PRESS WH, 1992, NUMERICLA RECIPES FO RAPAPORT DC, 1979, J CHEM PHYS, V71, P3299 RAPAPORT DC, 2004, ART MOL DYNAMICS SIM VANZON R, CONDMAT0612404 VANZON R, IN PRESS J COMPUT PH ZACHAROPOULOS N, 2005, J CHEM PHYS, V122 ZHOU YQ, 1999, J MOL BIOL, V293, P917; NR: 20; TC: 0; J9: J CHEM PHYS; PG: 12; GA: 138VLSource type: Electronic(1
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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