1,720,970 research outputs found
Male infertility: Before and after the era of sars-cov-2
No full textIt has been found that men are infected with the coronavirus 1.5 times more often than women, but at the same time 95% of them have mild infection. There are questions that require a scientific explanation: why are men infected more often and more susceptible than women, does the virus cross the blood-testicular barrier, can it be found in the seminal fluid, does SARS-CoV-2 have an effect on the production of androgens, is the testicle affected and what are the consequences of this damage, what is the direct effect of a virus and virus-associated problems (such as social problems, isolation, quarantine, psychological problems, sedentary lifestyle, etc.) primarily on sexual function, sexual behaviour and reproduction in general? The review article examines the SARS-CoV-2 pandemic-associated situation in 2020 and its effect on the men’s health. The article provides data on epidemiology, aspects of pathogenesis, features of new coronavirus infection in men. The authors announced the international reproduction associations (ASRM, ESHRE, RAHR) recommendations for the implementation of assisted reproductive technology (ART) programs in the era of the pandemic. Different points of view on the effect of testosterone on the disease incidence in men are presented. The importance of sperm oxidative stress and antioxidant therapy for male infertility has been shown. The tasks of an international project for the study of SARS-CoV-2 coronavirus infection and its consequences on men’s health are outlined. An invitation to collaboration with domestic and foreign specialists in the field of urology and andrology under the aegis of the National Medical Research Center of Obstetrics, Gynecology and Perinatology named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation has been published. © 2020, Remedium Group Ltd. All rights reserved
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
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
History of investigation and current classification of Coronaviruses (Nidovirales: Coronaviridae) [ИСТОРИЯ ИЗУЧЕНИЯ И СОВРЕМЕННАЯ КЛАССИФИКАЦИЯ КОРОНАВИРУСОВ (NIDOVIRALES: CORONAVIRIDAE)]
No full textAn epidemic of COVID-19 (Coronavirus disease 2019) etiologically associated with the SARS-CoV-2 (Severe acute respiratory syndrome-related coronavirus 2) that occurred at the turn of 2019–2020 firstly in Wuhan (Hubei province of China) and then spread to many countries around the world rose a new wave of interest to coronaviruses. The first coronaviruses – members of the Coronaviridae family belonging to the order Nidovirales — were discovered in the first half of the last century. The first human coronavirus, HCoV-B814, was isolated in 1965 that was not preserved in available virological collections. Over the last time, old-fashioned names and terms have been overlapped. By the beginning of the XXI century coronaviruses posed a serious veterinary problem but it was believed that epidemic coronaviruses were not among highly dangerous viruses. Scientific community had to revise such views first in 2002 when SARS-CoV (Severe acute respiratory syndrome-related coronavirus) was transferred to human population in the Southeast Asia from bats, and then in 2012 when natural foci of the MERS-CoV (Middle East respiratory syndrome-related coronavirus) were found on the territory of the Arabian Peninsula. Due to an increased interest in coronaviruses, a large number of new Coronaviridae members was discovered in the first two decades of the XXI century, which required to revise its taxonomic structure several times. This review is aimed at outlining a history of investigating coronaviruses and their current classification that was shaped in early 2020 in accordance to the last recommendations of the International Committee on Taxonomy of Viruses. © 2020 Saint Petersburg Pasteur Institute. All rights reserved
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
Mobile complexes of the specialized anti-epidemic teams (SAET) of the rospotrebnadzor as an effective tool in the implementation of measures to counter new coronavirus infection COVID-19 [мобильные комплексы спэб роспотребнадзора как действенный инструмент при реализации мероприятий по противодействию новой коронавирусной инфекции COVID-19]
No full textThe mobile complexes of the specialized anti-epidemic teams (SAET) of the Rospotrebnadzor (mounted on the platform of auto chassis) have been actively involved in implementation of operational measures to counter COVID-19 in the Russian Federation, aimed at management and conducting of diagnostic studies. Analysis of the activities of mobile SAET in Moscow and Makhachkala made it possible to formulate the basic principles of organizing their work in the most difficult period of negative development of the situation, increasing incidence and insufficient readiness of laboratory bases for mass research: tactics of advance actions, flexibility in using the potential of SAET mobile complexes, monitoring over the implementation of anti-contamination measures at all stages of PCR analysis and the development of a consultative and methodological (training) aspects of activities of the team specialists. The use of mobile SAETs of the Rospotrebnadzor once again demonstrated their significance as a universal tool to counter epidemics of infectious diseases. © 2020 Russian Research Anti-Plague Institute. All rights reserved
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