1,720,952 research outputs found
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
Outcome of chromosomally abnormal pregnancies in Lebanon: Obstetricians' roles during and after prenatal diagnosis
No full textObjectives: To better understand obstetrician experiences in Lebanon when disclosing abnormal amniocentesis results. Methods: Structured interviews with 38 obstetricians identified as caregivers from the American University of Beirut Medical Center Cytogenetics Laboratory database of patients with abnormal amniocentesis results between 1999 and 2005. Results: Obstetricians were primarily male, Christian, and with an average of 14 years of experience. They reported doing most pre-amniocentesis counseling, including discussion of risk for common autosomal aneuplodies (95percent), and procedure-related risk (95percent). Obstetricians reported that 80percent of patients at risk for aneuploidy underwent amniocentesis. The study population reported on 143 abnormal test results (124 autosomal abnormalities). When disclosing results, obstetricians reportedly discussed primarily physical and cognitive features of the diagnosis. They varied in levels of directiveness and comfort in providing information. Our records showed that 59percent of pregnancies with sex chromosome abnormalities were terminated compared to 90percent of those with autosomal aneuploidies; various reasons were proposed by obstetricians. Conclusions: This study is among the few to assess prenatal diagnosis practices in the Middle East, with a focus on the role of the obstetrician. Given the influence of culture and social norms on prenatal decision-making, it remains important to understand the various impacts on clinical practice in many nations. Copyright © 2007 John Wiley and Sons, Ltd.Abramsky L, 2001, BRIT MED J, V322, P463, DOI 10.1136-bmj.322.7284.463; *ACOG, 2002, OBSTET GYNECOL S1, V97; Bryar S H, 1997, J Obstet Gynecol Neonatal Nurs, V26, P559, DOI 10.1111-j.1552-6909.1997.tb02159.x; Christian SM, 2000, PRENATAL DIAG, V20, P37; DICKENS BM, 1982, BIRTH DEFECTS-ORIG, V18, P227; Drake H, 1996, CLIN GENET, V49, P134; Evans MI, 2005, SEMIN PERINATOL, V29, P215, DOI 10.1053-j.semperi.2005.06.004; Forrester MB, 2003, AM J MED GENET A, V119A, P305, DOI 10.1002-ajmg.a.20150; Geller G, 1993, Arch Fam Med, V2, P1119, DOI 10.1001-archfami.2.11.1119; Hall S, 2003, PRENATAL DIAG, V23, P535, DOI 10.1002-pd.637; HOLMESSIEDLE M, 1987, PRENATAL DIAG, V7, P239, DOI 10.1002-pd.1970070403; Mansfield C, 1999, PRENATAL DIAG, V19, P808, DOI 10.1002-(SICI)1097-0223(199909)19:9808::AID-PD6373.3.CO;2-2; MARTEAU T, 1994, J MED GENET, V31, P864, DOI 10.1136-jmg.31.11.864; Marteau TM, 2002, PRENATAL DIAG, V22, P562, DOI 10.1002-pd.374; Mezei G, 2004, OBSTET GYNECOL, V104, P94, DOI 10.1097-01.AOG.000128171.14081.eb; Nassar AH, 2004, GYNECOL OBSTET INVES, V58, P100, DOI 10.1159-000078793; NIELSEN J, 1984, CLIN GENET, V26, P422; Perrotin F, 2000, J Gynecol Obstet Biol Reprod (Paris), V29, P668; Preis Krzysztof, 2004, Ginekol Pol, V75, P760; ROBINSON A, 1983, BEHAV GENET, V13, P321, DOI 10.1007-BF01065770; ROBINSON A, 1989, AM J MED GENET, V34, P552, DOI 10.1002-ajmg.1320340420; Sagi M, 2001, PRENATAL DIAG, V21, P461, DOI 10.1002-pd.78; TANNENBAUM H L, 1986, American Journal of Human Genetics, V39, pA183; Tercyak KP, 2001, PATIENT EDUC COUNS, V43, P73, DOI 10.1016-S0738-3991(00)00146-4; VERP MS, 1988, AM J MED GENET, V29, P613, DOI 10.1002-ajmg.1320290320; Zahed L, 2002, PRENATAL DIAG, V22, P880, DOI 10.1002-pd.429; Zahed L, 1999, PRENATAL DIAG, V19, P1109; Zahed L, 1997, PRENATAL DIAG, V17, P423, DOI 10.1002-(SICI)1097-0223(199705)17:5423::AID-PD683.0.CO;2-P69
Prevalence of factor V Leiden, prothrombin and methylene tetrahydrofolate reductase mutations in women with adverse pregnancy outcomes in Lebanon
No full textObjective: The purpose of this study was to determine the prevalence of factor V Leiden, prothrombin, and methylene tetrahydrofolate reductase gene mutations in women with adverse pregnancy outcome compared with women who had uneventful pregnancies. Study design: Between 2003 and 2005, pregnant women with ≥1 unexplained second trimester abortion, ≥1 intrauterine fetal death, severe preeclampsia, or severe intrauterine growth restriction (study subjects) were compared with control subjects (uneventful pregnancy) for the frequency of the mutations. Results: The cases of 91 patients in each arm were analyzed. Obstetric complications were second trimester abortions (16.5percent), intrauterine fetal death (53.8percent), preeclampsia (8.8percent), and severe intrauterine growth restriction (20.9percent). Study subjects were more likely to be older and multiparous compared with control subjects. The 2 groups showed no difference in the incidence of smoking or family history of thrombosis, but study subjects were more likely to have a positive family history of obstetric complications. The prevalence of factor V Leiden (12.1percent vs 18.7percent; P = .304), prothrombin (7.7percent vs 5.5percent; P = .765), methylene tetrahydrofolate reductase gene mutations (53.8percent vs 65.9percent; P = .130), and 1 mutation (11.0percent vs 17.6percent; P = .290) was not significantly different between study subjects and control subjects. Conclusion: Factor V Leiden, prothrombin, and methylene tetrahydrofolate reductase gene mutations did not seem to play a significant role in adverse pregnancy outcome in our population. © 2006 Mosby, Inc. All rights reserved.Almawi WY, 2004, AM J HEMATOL, V76, P85, DOI 10.1002-ajh.20047; Alonso A, 2002, AM J OBSTET GYNECOL, V187, P1337, DOI 10.1067-mob.2002.126849; [Anonymous], 2002, PRACT B; Dizon-Townson D, 2005, OBSTET GYNECOL, V106, P517, DOI 10.1097-01.AOG.0000173986.32528.ca; Finan RR, 2002, AM J HEMATOL, V71, P300, DOI 10.1002-ajh.10223; FROSST P, 1995, NAT GENET, V10, P111, DOI 10.1038-ng0595-111; Gerhardt A, 2005, THROMB HAEMOSTASIS, V93, P124, DOI 10.1160-TH04-07-04-1; Gonen R, 2005, AM J OBSTET GYNECOL, V192, P742, DOI 10.1016-j.ajog.2004.12.050; Grandone E, 1997, THROMB HAEMOSTASIS, V77, P822; Howley HEA, 2005, AM J OBSTET GYNECOL, V192, P694, DOI 10.1016-j.ajog.2004.09.011; Irani-Hakime N, 2000, AM J HEMATOL, V65, P45, DOI 10.1002-1096-8652(200009)65:145::AID-AJH83.0.CO;2-V; Kobashi G, 2005, SEMIN THROMB HEMOST, V31, P266, DOI 10.1055-s-2005-872430; Kujovich JL, 2004, AM J OBSTET GYNECOL, V191, P412, DOI 10.1016-j.ajog.2004.03.001; Kupferminc MJ, 1999, NEW ENGL J MED, V340, P9, DOI 10.1056-NEJM199901073400102; Lin J, 2005, OBSTET GYNECOL, V105, P182, DOI 10.1097-01.AOG.0000146250.85561.e9; Lockwood CJ, 2002, OBSTET GYNECOL, V99, P333, DOI 10.1016-S0029-7844(01)01760-4; MILLER SA, 1988, NUCLEIC ACIDS RES, V16, P1215, DOI 10.1093-nar-16.3.1215; Rey E, 2003, LANCET, V361, P901, DOI 10.1016-S0140-6736(03)12771-7; Robertson L, 2006, BRIT J HAEMATOL, V132, P171, DOI 10.1111-j.1365-2141.2005.05847.x; Salomon O, 2004, AM J OBSTET GYNECOL, V191, P2002, DOI 10.1016-j.ajog.2004.07.053; Stanley-Christian H, 2005, J SOC GYNECOL INVEST, V12, P198, DOI 10.1016-j.jsgi.2004.11.001; Taher A, 2003, THROMB HAEMOSTASIS, V89, P945; Tranquilli AL, 2004, EUR J OBSTET GYN R B, V117, P144, DOI 10.1016-j.ejogrb.2004.01.04416161
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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