1,720,960 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
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
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
Rasedustüsistuste riski hindamise ja varase diagnoosimise kliinilised ja biokeemilised markerid
No full textVäitekirja elektrooniline versioon ei sisalda publikatsiooneKuigi enamus rasedustest kulgeb probleemideta, kogeb iga neljas naine raseduse ajal tüsistusi.
Aastatel 2012 - 2018 uurisime preeklampsia (PE) ja gestatsioondiabeedi (GDM) riskitegurite esinemissagedust ning sõeltestide efektiivsust Tartu Ülikooli Kliinikumi naistekliinikus jälgimisel olnud rasedate hulgas.
PE on rasedustüsistus, millele viitab vererõhu tõus raseduse teises pooles ning lisanduvad muude organite kahjustuse sümptomid. Vähemalt üks PE riskile viitav riskitegur (PE varasema raseduse ajal, krooniline hüpertensioon, diabeet, kunstlik viljastamine, mitmikrasedus, esimene oodatav sünnitus, rasvumine ja ema vanus > 40 a) esines 53%-l uuritud rasedatest. Riskiteguri olemasolu suurendas PE tekke riski 7,8 korda. Suurem tõenäosus PE tekkimiseks oli rasedatel, kellel oli diabeet või PE eelneva raseduse ajal. Enamusel riskiteguritega rasedatest PE ei teki.
Raseduse III trimestri PE riski hindamiseks analüüsisime kahe platsentast pärineva biomarkeri (sFlt-1 ja PlGF) taset III trimestril kogutud vereproovidest. Test tuvastas 58% naistest, kellel hiljem diagnoositi PE, valepositiivseid tulemusi oli 10%.
PE juhtude varast avastamist on võimalik parandada uudse multimarker testi abil. Kombineerides biomarkereid (sFlt-1, PlGF, ADAM12, sENG ja leptin) ning kliinilist infot (raseduse kestus ja ema kaal verevõtul) on võimalik tuvastada 100% rasedatest, kelle hiljem diagnoositakse PE. Antud testil oli valepositiivseid juhte 4%.
GDM on üks sagedaseimaid rasedustüsistusi, mis diagnoositakse, kui raseduse ajal teostatud glükoosi tolerantsus testil (GTT) on veresuhkru väärtus normist kõrgem.
Eestis suunatakse GTT-le rasedad, kellel on varasem GDM või suurekaaluline vastsündinu, diabeet lähisugulasel, polütsüstiliste munasarjade sündroom, paastusuhkur >5,1 mmol/L, glükosuuria, ülekaalulisus, liigne rasedusaegne kaaluiive või kahtlus suurele lootele.
Uuringus leiti, et seitsme aasta jooksul on suurenenud GDM riskiteguritega naiste arv, rohkem rasedaid suunatakse GTT-le ning samuti on tõusnud GDM esinemissagedus.
Rasedad, kellel on GDM riskitegurid, isegi kui GTT on normis, on ohustatud suuremast rasedusaegsest kaaluiibest ja sünnitavad suurema sünnikaaluga lapse.Most of the pregnancies proceed without problems, however, complications occur approximately one in four pregnancies.
Between 2012 to 2018 we conducted three studies in Women’s Clinic, Tartu University Hospital to assess risk factors and screening methods for preeclampsia (PE) and gestational diabetes (GDM).
PE is pregnancy complication with new hypertension after 20 pregnancy weeks and additional maternal or fetal health problems. At least one of the risk factors referring to increased risk for PE (chronic hypertension, diabetes, kidney disease, previous PE, obesity, IVF, maternal age > 40 and nulliparity) occurred in 53% of pregnant population. Presence of a risk factor increased individuals’ risk for PE 7.8-fold, especially for women with pre-pregnancy diabetes and/or previous PE. However most women with risk factors will not develop PE.
For early PE detection in the III trimester, two placenta derived markers (sFlt-1 and PlGF), were analyzed from blood samples of pregnant women. The test detected 58% of subsequent PE cases with false positive rate of 10%.
The detection was improved by combining simultaneous measurement of biomarkers (sFlt-1, PlGF, ADAM12, sENG, and leptin) and maternal characteristics (gestational age and maternal weight at the blood draw). This novel test detected 100% of subsequent PE cases with 4% of false positive rate.
GDM, is one of the most common pregnancy complications and is diagnosed when hyperglycemia is detected during oral glycose tolerance test (OGTT) after 20 pregnancy weeks.
In Estonia, referral to OGTT for GDM screening is recommended for women with risk-factors: overweight or obesity, family history of diabetes, previous GDM and/or birth of a large newborn, polycystic ovaries syndrome, fasting glucose >5.1 mmol/L, glycosuria, excessive weight gain or suspicion of macrosomic fetus.
Our study showed increasing numbers of individuals with GDM risk factors, referrals to OGTT and GDM diagnosis within seven years. Pregnant women with GDM risk factors, despite of normal OGTT, were at risk of increased gestational weight gain and large for gestational age newborns.https://www.ester.ee/record=b557563
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
Rasedustüsistused kui kardiovaskulaarhaiguste ja diabeedi riskitegurid
Full text linkArtikli eesmärk on teadvustada rasedustüsistusi, preeklampsiat ja rasedusdiabeeti kui südame-veresoonkonnahaiguste ja diabeedi riskitegureid. Rasedusest tingitud muutused naise organismis võivad paljastada eelsoodumuse mitmetele kroonilistele haigustele. Preeklampsia põdemine suurendab naise riski haigestuda kardiovaskulaarhaigustesse kuni neli korda, gestatsioondiabeeti kuni kaks korda. Diabeeti haigestumise risk nende rasedustüsistuste põdemise järel on suurenenud vastavalt kaks ja seitse korda. Praegu puuduvad avaldatud uuringud preeklampsiat ja gestatsioondiabeeti põdenud naiste kardiovaskulaarse riski hindamise, edasise jälgimise ja profülaktiliste meetmete efektiivsuse kohta. Arvatakse, et abi võiks olla tervisliku eluviisi järgimisest (kehakaalu alandamine, füüsiline aktiivsus). Rasedustüsistuste diagnoosimine ja ravi kuuluvad günekoloogi kompetentsi, kuid teadmine sünnituse järel riskirühma kuuluvast naisest on vajalik ka teiste erialade spetsialistidele, kes naist edasi nõustades võivad mõjutada tema tervist.Eesti Arst 2015; 94(6):347–35
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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