1,721,760 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
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
Macroinfaunal assemblages associated with mussel and clam beds in an estuary of Southern Chile
No full textSamples were collected from September 1990 to February 1992, at three subtidal sites of the middle reaches of the Queule River estuary, southern Chile, to analyze the spatial and temporal variability of the macroinfauna inhabiting substrata with different abundances of bivalves. In addition, water and sediment samples were obtained to study the relationships between the temporal variability in macroinfaunal abundances, physical factors, and chlorophyll a content. Temperature, salinity, and chlorophyll a showed a rather strong seasonal variability but slight between-site differences. Sediment characteristics and bivalve abundances, by contrast, exhibited little temporal variability but large differences between sites. The macroinfauna was primarily represented by polychaetes, Prionospio (Minuspio) patagonica being dominant in the three areas. Most dominant species showed similar trends of temporal variability, with maximum abundances recorded during spring and fall. The appearance of recruits was restricted to the summer with little difference among sites. Multiple regression analyses showed that the temporal variability of macroinfaunal adults and recruits, was primarily associated with variability in salinity and water temperature, respectively. Spatial variability of these organisms was also explained by variations in these factors, together with those of sediment texture and organic matter content. No evidence of interactions (significant relationships) was found between the abundances of bivalves and those of the macroinfauna, nor among macroinfaunal organisms.PT: J; CR: ANDERSSON CA, 1981, ADV CERAM, V3, P184 ANDRE C, 1991, MAR ECOL-PROG SER, V71, P227 BACHELET G, 1986, HYDROBIOLOGIA, V142, P233 BERTRAN CE, 1989, REV CHIL HIST NAT, V62, P19 BEUKEMA JJ, 1986, OPHELIA, V26, P45 BEUKEMA JJ, 1990, EXPECTED EFFECTS CLI, P83 BRAVO A, 1989, THESIS U AUSTR CHILE BUTMAN CA, 1987, OCEANOGR MAR BIOL, V25, P113 DETHIER MN, 1984, ECOL MONOGR, V54, P99 DEVOOYS CGN, 1990, EXPECTED EFFECTS CLI, P83 DITTMANN S, 1990, HELGOLANDER MEERESUN, V44, P335 FOLK RL, 1980, PETROLOGY SEDIMENTAR GRASSLE JF, 1974, J MARINE RE, V32, P253 GRAY JS, 1974, OCEANOGR MAR BIOL AN, V12, P223 HAIR JF, 1979, MULTIVARIATE ANAL HAVEN DS, 1972, GEOL SOC AM MEM, V133, P121 HINES AH, 1989, VELIGER, V32, P109 HOLLAND AF, 1987, ESTUARIES, V10, P227 JARAMILLO E, 1985, STUDIES NEOTROPICAL, V20, P33 JARAMILLO E, 1992, PSZNI MAR ECOL, V13, P317 JARAMILLO E, 1993, MARINE ECOLOGY PROGR, V82, P85 JOHNSON RG, 1977, J MAR RES, V35, P273 LEVIN LA, 1984, ECOLOGY, V65, P1185 LOW A, 1993, THESIS U AUSTR CHILE NICHOLS FH, 1986, SCIENCE, V231, P525 OLAFSSON EB, 1986, J ANIM ECOL, V55, P517 PATERSON DM, 1991, DEV COASTAL ENG, P111 PETERSON CH, 1979, ECOLOGICAL PROCESSES, P233 PETERSON CH, 1987, LIMNOL OCEANOGR, V32, P143 PETHICK J, 1984, INTRO COASTAL GEOMOR PINO M, 1983, REV GEOLOGICA CHILE, V18, P77 POSEY MH, 1987, MAR ECOL-PROG SER, V39, P99 POSEY MH, 1990, REV AQUAT SCI, V2, P343 QUIJON P, 1993, ESTUAR COAST SHELF S, V37, P655 REISE K, 1983, MAR ECOL-PROG SER, V12, P229 REISE K, 1985, TIDAL FLAT ECOLOGY E RHOADS DC, 1970, J MAR RES, V28, P150 RHOADS DC, 1982, ANIMAL SEDIMENT RELA, P3 RISK MJ, 1977, J SEDIMENT PETROL, V47, P1425 ROJAS C, 1984, REV BIOL MARINA VALP, V20, P139 ROMAN MR, 1978, ESTUARINE COASTAL MA, V6, P47 SHA LP, 1991, CLASTIC TIDAL SEDIME, P199 SOKAL RR, 1969, BIOMETRIA SOUZA WP, 1979, ECOLOGY, V60, P1225 STOLINE MR, 1981, AM STAT, V35, P134 STRICKLAND JDH, 1972, B FISH RES BOARD CAN, V167 THISTLE D, 1981, MAR ECOL-PROG SER, V6, P223 TORO JE, 1984, REV BIOL MARINA VALP, V20, P23 VOS PC, 1988, TIDE INFLUENCED SEDI, P511 WILSON WH, 1991, ANNU REV ECOL SYST, V21, P221 WOODIN SA, 1976, J MARKETING RES, V34, P25; NR: 51; TC: 8; J9: ESTUARIES; PG: 13; GA: TU217Source 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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