1,721,059 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
Markerii stresului oxidativ în insuficienţa cardiacă pediatric secundară cardiopatiilor congenitale asociate cu hipertensiune pulmonară
Full text linkStudiul dat a cuprins 94 de copii cu ICC secundară cardiopatiilor congenitale, la care s-au determinat nivele serice ale unor indici ai stresului oxidativ în serul sangvin:
hidroperoxizii lipidici (HPL) timpurii, intermediari şi tardivi, dialdehida malonică (DAM) şi activitatea antioxidantă totală (AAT). Lotul I, de bază, l-au constituit 75 de bolnavi cu ICC şi HTPA de diferit grad, şi lotul II, de comparaţie – 19 pacienţi cu ICC, dar fără HTPA. Rezultatele obţinute au fost comparate cu lotul de sănătoşi – 20 de
copii cu vârste similare. S-au depistat valori serice crescute ale HPL, DAM la pacienţii cu ICC secundară şunturilor congenitale complicate cu HTPA, faţă de lotul-martor, dar
mai pergnant la cei cu HTPA severă, depăşind nivelul copiilor cu HTPA moderată (
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
Notă de referinţă asupra monografiei „Hipertensiunea arterială esenţială la copii” autorul monografiei: Nelea Mătrăgună, doctor în medicină, conferenţiar, Şef Laborator Cardiologie Pediatrică
Full text linkСиндром сердечной недостаточности у детей (стандартизированный клинический протокол для отделений неотложной помощи)
Full text linkIMSP Institutul Mamei şi Copilului, Universitatea de Stat de Medicină şi Farmacie “Nicolae Testemiţanu”,
Departamentul PediatrieIntroduction: Heart failure (HF) syndrome is defined by the heart’s inability to produce cardiac output systemic or
pulmonary for tissue needs or to support it under increased filling pressures.
Aim: Studying Heart Failure Syndrome management in Children.
Materials and Methods: The article is based on medical publications from international literature and online
material.
Results: HR causes are divided into cardiac and extracardiac. The cardiac causes are structural abnormalities -
cardiac overload, left-right shunt, pressure overload, valvular insufficiency, but may also be “normal” in the regular
heart - primary and secondary cardiomyopathy. Typical clinical manifestations in children may be tachypnea, alimentation
problems (reflux, vomiting, loss of appetite), diaphoresis, and palpitations. The paraclinical evaluation includes
routine analyzes and NT-proBNP, BNP, CK, MB fractions, cardiac troponins, C-reactive protein, and functional and
interventional tests (ECG standard 12 derivates, thoracic radiography + ICT, Echocardiography, Doppler-EcoCG).
Treatment of acute HF includes diuretics, inotropic therapy - milrinone, dobutamine, epinephrine, digoxin, systemic
vasodilators. Chronic HF therapy includes IECA (captopril, enalapril, ramipril, perindopril), angiotensin II receptor
antagonists - losartan, beta-blockers, aldosterone antagonists.
Conclusion: The key to achieving therapeutic success and implicitly the survival of the pediatric patient is the appreciation
and treatment of the HF cause and gradual introduction of drug therapy according to the severity of clinical
and paraclinical data.Введение. Синдром сердечной недостаточности (СН) определяется неспособностью сердца обеспечить
системный или легочной систолический объем крови в соответствии с тканевыми потребностями, а также
поддерживания этого объема при повышенном давлении наполнения.
Цель. Изучение принципов неотложной помощи при синдроме сердечной недостаточности у детей.
Материалы и методы. Статья основана на современных данных опубликованных в медицинских изданиях,
международной литературе и онлайн-материалах.
Результаты. Причины СН делятся на сердечные и внесердечные. Сердечные причины это структурные
аномалии развития – пороки сердца которые приводят к сердечной перегрузке объемом, с лево-правым направлением сброса, с перегрузкой давлением, клапанная недостаточность, но также могут быть при нормально
развитом сердце – первичные и вторичные кардиомиопатии. Типичными клиническими проявлениями у ново-
рожденных и детей грудного возраста могут быть учащенное дыхание, проблемы с питанием (срыгивания,
рвота, потеря аппетита), потоотделение, бледность. Параклиническое обследование включает в себя рутинные анализы, а также фракции NT-proBNP, BNP, CK, фракция MB, сердечные тропонины, C-реактивный белок
и функциональные и интервенционные тесты (стандартное ЭКГ, рентгенография органы грудной клетки +
измерение КТИ, эхокардиография, ЭХО-КГ сердца с допплерометрией). Лечение острой СН включает петле-
вые диуретики, инотропную терапию (недостаточно доказательств), милринон, добутамин, адреналин, дигоксин, системные вазодилататоры. Лечение хронической СН включает ингибиторы АПФ (каптоприл, эналаприл, рамиприл, периндоприл), антагонисты рецепторов ангиотензина II - лозартан, бета-блокаторы (метопролол, бисопролол, карведилол), антагонисты альдостерона.
Вывод. Ключевым фактором достижения терапевтического успеха и увеличения продолжительности
жизни больного ребёнка является выявление и лечение причины сердечной недостаточности, а также поэтапное введение лекарственной терапии в зависимости от тяжести клинических и параклинических данных
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
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