1,720,964 research outputs found
Mobile Reproductive Labor:Fly-in Fly-out Clinicians, Batched Patients, and Extraction in African Assisted Reproduction
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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
Consanguinity and family clustering of male factor infertility in Lebanon
No full textObjective: To investigate the influence of consanguineous marriage on male factor infertility in Lebanon, where rates of consanguineous marriage remain high (29.6percent among Muslims, 16.5percent among Christians). Design: Clinic-based, case-control study, using reproductive history, risk factor interview, and laboratory-based semen analysis. Setting: Two IVF clinics in Beirut, Lebanon, during an 8-month period (January-August 2003). Patient(s): One hundred twenty infertile male patients and 100 fertile male controls, distinguished by semen analysis and reproductive history. Intervention(s): None. Main Outcome Measure(s): Standard clinical semen analysis. Result(s): The rates of consanguineous marriage were relatively high among the study sample. Patients (46percent) were more likely than controls (37percent) to report first-degree (parental) and second-degree (grandparental) consanguinity. The study demonstrated a clear pattern of family clustering of male factor infertility, with patients significantly more likely than controls to report infertility among close male relatives (odds ratio = 2.58). Men with azoospermia and severe oligospermia showed high rates of both consanguinity (50percent) and family clustering (41percent). Conclusion(s): Consanguineous marriage is a socially supported institution throughout the Muslim world, yet its relationship to infertility is poorly understood. This study demonstrated a significant association between consanguinity and family clustering of male factor infertility cases, suggesting a strong genetic component. © 2009 American Society for Reproductive Medicine.ABBASISHAVAZI MJ, J BIOSOC SC IN PRESS; Al-Abdulkareem AA, 1998, J COMMUN HEALTH, V23, P75, DOI 10.1023-A:1018727005707; AlGazali LI, 1997, J BIOSOC SCI, V29, P491, DOI 10.1017-S0021932097004914; Alkhalaf M, 2002, ANN GENET-PARIS, V45, P147; Baccetti B, 2001, HUM REPROD, V16, P1365, DOI 10.1093-humrep-16.7.1365; Birenbaum-Carmeli Daphna, 2004, COMMUNITY GENET, V279, P1; BITTLES AH, 1991, SCIENCE, V252, P789, DOI 10.1126-science.2028254; Bittles AH, 2002, ANN HUM BIOL, V29, P111, DOI 10.1080-03014460110075657; Chan Peter, 2007, AM SOC REPR MED OCT; ELHAZMI MAF, 1995, J MED GENET, V32, P623, DOI 10.1136-jmg.32.8.623; Gunaid AA, 2004, J BIOSOC SCI, V36, P111, DOI 10.1017-S0021932003006138; Hamamy H, 2005, CLIN GENET, V67, P511, DOI 10.1111-j.1399-0004.2005.00426.x; Hussain R, 2004, J HEALTH POPUL NUTR, V22, P1; Hussain R, 2002, AM J HUM BIOL, V14, P264, DOI 10.1002-ajhb.10034; HUSSAIN R, 1999, AM J HUM BIOL, V14, P449; INBORN MC, 2004, MED ANTHROPOL Q, V18, P162; Inhorn M. C., 2003, LOCAL BABIES GLOBAL; Jabbra NW, 2004, J COMP FAM STUD, V35, P259; Jurdi R, 2003, J BIOSOC SCI, V35, P1, DOI 10.1017-S0021932003000014; Krausz C., 2003, INT J ANDROL, V26, P570; Latini M, 2004, FERTIL STERIL, V81, P1688, DOI 10.1016-j.fertnstert.2003.10.048; Maduro MR, 2002, J UROLOGY, V168, P2197, DOI 10.1016-S0022-5347(05)64355-8; Maduro MR, 2003, J ANDROL, V24, P485; Mohammed F, 2007, ANDROLOGIA, V39, P87, DOI 10.1111-j.1439-0272.2007.00769.x; PANTERBRICK C, 1991, SOC SCI MED, V33, P1295, DOI 10.1016-0277-9536(91)90078-Q; Rajab A, 2000, ANN HUM BIOL, V27, P321; SAAD F, 2004, AM J UROL REV S2, V2, P9; Shah K, 2003, REPRODUCTION, V126, P13; Sueyoshi S, 2003, J BIOSOC SCI, V35, P513, DOI 10.1017-S0021932003005911; TEEBI AS, 1996, GENETIC DISORDERS AR; World Health Organization, 1999, LAB MAN EX HUM SEM S; Zlotogora J, 1997, AM J MED GENET, V68, P472, DOI 10.1002-(SICI)1096-8628(19970211)68:4472::AID-AJMG203.0.CO;2-O76
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
Gender, Religion, and In Vitro Fertilization
Get PDFSince the birth of Louise Brown, the world's first 'testtube baby' in 1978, the new reproductive technologies (NRTs) have spread around the globe, reaching countries far from the technology-producing nations of the West. Perhaps nowhere is this globalization process more evident than in the nearly twenty nations of the Muslim Middle East, where in vitro fertilization (IVF) centres have opened in nations ranging from small, oil-rich Bahrain and Qatar to larger but less prosperous Morocco and Egypt. Egypt provides a particularly fascinating locus for investigation of this global transfer of NRTs because of its ironic position as one of the poor, 'overpopulated' Arab nations
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
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