1,720,975 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
From body mass index to body composition analysis in diagnostic of childhood obesity
Full text linkBackground: The prevalence of obesity increased worldwide in children and adolescents from 1975 to 2016. The recent increase in childhood obesity has led to an interest in the question of which definitions should be used to distinguish the obese child. Body mass index (BMI) was recommended for use in children to assess body weight status. There are several international (World Health Organization, International Obesity Task Force, Center for Disease Control) and national BMI cut-offs references, and it is a major obstacle in studying global secular trends for younger age groups. Moreover, BMI does not distinguish between increased mass in the form of fat, lean tissue or bone, and hence can lead to significant misclassification. The ideal monitoring tool should directly assess adiposity. All available body composition methods in children are indirect. The gold standard for body composition is the four compartment (4-C) model. Although bioelectrical impedance analysis is most susceptible to imprecision when compared with the 4-C model it is the most logical bedside method to apply in children owing to its low cost, noninvasiveness, lack of radiation exposure and ease of use.
Conclusions: BMI may produce a significant level of misclassification. Population-based cut-off values for body fat determined by body composition reference methods are the best criterion. Bioelectrical impedance is inexpensive, portable, simple and rapid to use. Further studies to elucidate the relationship among BMI, body fatness, fat distribution, and health risks in children should be followed
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
Оценка физического развития подростков
Full text linkUniversitatea de Stat de Medicină şi Farmacie ”Nicolae Testemiţanu”Purpose: assessment of physical development of children during puberty with particularities in overweight children.
Materials and methods. The study included 2700 children, of whom 1397 boys (50.4%) and 1373 girls (49.6%)
aged between 10 and 16 (mean age 12.9 years ± 1.8 years). The research included determining anthropometric indices
(size, body weight, body mass index (BMI), percentage of body fat assessment by bioelectrical impedance, waist circumference, hip circumference, neck circumference and arm circumference). Excess body weight was found at children
with BMI greater than the 85th percentile by age and sex.
Results. The evaluation and analysis of physical development indicators of children showed, that 117 children
(4.2%) were underweight, and 434 children (15.6%) were overweight. 76 children were obese (2.7%), with a predominance of boys and on urban children. We noticed, that 80,4% of overweight children had high percentage of body fat.
Children with increased body mass have higher values of waist circumference (13.2 cm boys and 10,6 cm girls compared with the average per group), hip circumference (11.7 cm boys and 11.4 cm girls), neck circumference ( 2.8 cm boys
and 2.3 am girls) and arm circumference (3.7 cm boys and 4.2 cm girls).
Conclusions. All children with malnutrition and overweight need medical supervision. Such indicators as the waist,
hip, neck and arm circumferences are easily determined and can be used together with BMI to determine overweight
in children.Одним из основных критериев здоровья детей является их физическое развитие, с морфофункциональными
показателями, характеризующими гармоничность процесса роста. Актуальной проблемой, в том числе и для
подростков, является проблема избыточного веса.
Цель: определение антропометрических показателей физического развития детей в подростковом периоде с выявлением особенностей у детей с избыточным весом.
Материалы и методы. Проведено обследование 2700 детей (1397 мальчиков (50,4%) и 1373 девочки (49,6%))
в возрасте 10-16 лет (средний возраст -12,9 ± 1,8 лет). Для решения задачи проводились измерения роста, веса,
определялся процент общей жировой ткани (% ОЖТ) методом биоимпедансного анализа, проведены измерения окружностей талии, бедер, шеи и руки.
Результаты. Согласно ИМТ, у 19,9% детей наблюдаются отклонения в весе со значительным преобладанием детей с избыточным весом (15,6% и 4,2%).У 72 детей констатировано ожирение, преобладают мальчики
и дети из городской среды. Среди детей с избыточным весом 80,4% детей имеют повышенные показатели %
ОЖТ. Также у таких детей повышены показатели окружностей талии, бедер, руки и шеи, которые положительно коррелируют с массой тела и ИМТ.
Выводы: все дети с отклонениями в физическом развитии нуждаются в медицинском наблюдении. Такие
показатели, как окружности талии, бедер, шеи и руки, легко определяются и могут быть использованы совместно с ИМТ для определения избыточного веса
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
Risk factors in the development of overweight in children during puberty: a retrospective, case-control study
Full text linkDepartamenul de pediatrie, Universitatea de Stat de Medicină și Farmacie
„Nicolae Testemiţanu”, Chișinău, Republica Moldova,
Institutul Mamei şi Copilului, Chişinău, Republica MoldovaRezumat
Introducere. Obezitatea a fost atribuită unor factori
diverși, printre care: factorii genetici, de mediu, metabolici, de
comportament, eredo-colaterali, culturali și socioeconomici.
Creșterea alarmantă a numărului de copii obezi, înregistrată
în ultimii ani în ţările în curs de dezvoltare, dictează necesitatea
cercetării aprofundate a naturii acestei stări.Abstract
Introduction. Obesity has been attributed to various factors,
including genetic, environmental, metabolic, behavioral,
heredo-collateral, cultural and socioeconomic factors. The
alarming increase in the number of obese children in recent
years in developing countries dictates the need for in-depth
research into the nature of this condition
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