1,721,138 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
Tektonizmanın aktif olduğu çınarçık çukuru-izmit körfezi geçişindeki karot sedimentlerinin yapısal ve dokusal özellikleri
No full textÇınarcık Çukuru - İzmit Körfezi arasında kalan denizel alanda aktif tektonizmanın etkilerini araştırmak amacı ile hazırlana bu tez çalışması sedimentlerin dokusal ve yapısal özelliklerinin incelenmesini kapsamaktadır. 2003 yılında MTA Sismik 1 Araştırma Gemisi ve TÜBİTAK desteği (Proje YDABÇAG 103Y103) ile gerçekleştirilen bu projede 49–442 m arası su derinliklerinde ve 18 nokta istasyon üzerinde alınan sediment karotlarında petrografik ve jeokimyasal çalışmalar yapılmıştır. Çınarcık Çukuru ve İzmit Körfezi arasında kalan deniz tabanının takriben üst 2-4 metresi % 90’dan fazla karasal kırıntılı silt+kilden oluşan ve çoğunluğu denizel biyojenik kökenli ve düşük karbonatlı (<%15) çamur türü sedimentler ile örtülüdür. Genelde Holosen dönemine ait olan bu sedimentlerde yer yer tespit edilen kaba taneli ve laminalı seviyelerin sismotektonik ve fıtınalı dalga süreçlerine bağlı olabileceği düşünülmektedir. Hernekadar su miktarı, tane yoğunluk parametrelerindeki karot boyu farklılıklar çoğunlukla diyajenetik ve litolojik değişimler ile izah edilse de bilhassa İzmit Körfezi girişine doğru bölgesel değişimler kısmen de olsa sismotektonik süreçlere işaret edebilir. % 1-2 arasında değişen organik karbon miktarlarının kaynağı büyük bir olasılıkla denizel, karasal ve antropojenik olup, karot boyu değişimlerde Holosen’de sapropel oluşum koşulları tartışılabilir
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
Tekirdağ Çukuru'nun (Batı Marmara Denizi) geç kuvaterner sedimantolojisi ve inorganik jeokimyası
No full textTekirdağ Çukuru'nun geç Kuvaterner sedimentlojik ve inorganik jeokimyasal özelliklerinin ve bunları kontrol eden karasal, iklimsel ve denizel faktörleri araştırmak amacı ile MTA-Ankara Üniversitesi ile ortaklaşa yapılan çalışma TÜBİTAK tarafından (Proje YDABAG 101Y071) desteklenmiştir. Bu çerçevede 2001yılında MTA Sismik-1 Araştırma Gemisi ile Tekirdağ Havzası'ndan 11 sediment karotu ve 3 sismik profil alınmıştır. Karot sedimentlerinde tane boyu, su miktarı, karbonat, organik karbon, mineralojik, radyokarbon tarihlendirme, kimyasal multielement ve istatiksel değerlendirme analizleri yapılmıştır. Düşük karbonatlı (< %12 CaCO3) ve silt ve kilce zengin (>%90 çamur) sediment türleri havzada yaygın olup, kuzey şelfteki denizel- bentik karbonatlı sedimentler hariç çoğunlukla karasal kökenlidir. Su miktarları (%10- 46), genelde değişen tane boyu dağılımı ile derinlikle artan gömülme - diyajenetik paketlenme süreçlerine işaret ederken, bazı bölgelerde tektonik sıkışma etkilerini göstermektedir. Organik karbon miktarları, Marmara Denizi'nin organik üretimi, bu denizin kıyıardı girdisi ve Karadeniz'den karışım ile izah edilebilir. Karotların orta ve alt kısımlarındaki nispeten organik karbonca yüksek seviyeler Marmara Denizi üst sapropel oluşumuna benzerlik göstermektedir. İnorganik element miktarları her ne kadar çoğunlukla litojenik- terrijenik kaynaklara işaret etse de, nispeten yüksek Pb, Zn, Cu miktarları antropojenik, Mn diyajenetik, Cr ve Ni mağmatik kaynakların varlığının göstergesidir. Sismik fasiyesler derin düzlükte paralel yansımalı fasiyesler ve yamaçta kümbetimsi kütlesel taban hareketlerine işaret etmektedir. Simektit, illit ve klorit önemli kil mineralleri iken, biyojenik kökenli kalsit ve aragonit ile litojenik kökenli kuvars feldispat, hornblend, dolomit, jips kil olmayan minerallerin başlıcalarıdır. Abstract The Late Quaternary sedimentology and inorganic geochemical properties of the Tekirdağ Basin and the aim of investigating the terrestrial, climatic and marine factors controlling them by the collective study of MTA-Ankara University have been supported by TÜBİTAK (Project YDABAG 101 Y 071). In this context, 11 sediment cores and 3 seismic profiles have been collected from the Tekirdağ Basin with the help of MTA Sismik-1 investigation ship in the year 2001. In the sediments of cores, the grain sizes, amount of water, carbonate, organic carbon, mineralogical, radiocarbon dating, chemical multi-element and statistical evaluation analyses have been performed. The sediments with low carbonate (< %12 CaCO3) and those rich with silt (>%90 mud), widespread in the basin, are mostly terrestrial origin except the marine sediments with carbonate in the northern shelf. The amount of water, generally indicating the changing distribution of the grain sizes and the slumps-digenetic packaging processes increasing with depth, presents tectonic jamming effects in some areas. The amount of organic carbon, organic production of the Marmara Sea, can be explained through the inputs of this sea and its admixture with Karadeniz. The relatively high levels of organic carbon in the centre and bottom parts of the cores display similarity in the upper sapropel formation of the Marmara Sea. The amounts of inorganic element, though mostly indicating litogenic- terrigenic sources, are actually the indicators of the existence of relatively high Pb, Zn, and Cu amounts, anthropogenic, Mn diyagenic, Cr and Ni magmatic sources. The seismic facies indicate the parallel reflexive facies in deep flatness and the movements of vaulty massive bases on the slope. While simectite, illite and chlorite are important clay minerals, biogenic origin calcite and aragonite along with lithogenic origin quarts, feldispate, hornblende, dolomite and jips are the main non-clay minerals
Kuşadası Körfezi Pamucak plajlarının (Batı Türkiye) sedimantolojik ve mineralojik özellikleri
No full textThe main purpose of this thesis work is to investigate textural and mineralogical characteristics ofsediments in detail and factors controlling marine hydrodynamic and terrestrial geological effects atPamucak and Davutlar beaches where Küçük Menderes River enters the Aegean Sea. İn this contextsediments were collected at a total of 42 sampling stations from shoreline and backshore areas of thePamucak and Davutlar beaches. Sediment samples were then subjected to grain size, heavy mineral andgeochemical multielement analysis.Fine-to medium-sand is the dominant grain size of beach sediments and differences in mean grain size,sorting, skewness and kurtosis can be explaned by regional varying hydrodynamic and river inputconditons.Heavy mineral contents of sediments were generally high and varied between 0,8 and 75 %. Heavymineral fractions contained 5-20 % opaque minerals. Other minerals with abundances of between 5 and20 were almandine, pyrope, grossular, sillimanite, staurolite, rutile, epidote, zoisite, augite, diopside,hypersthene, tremolite, actinolite, horblende, glaucophane, muscovite, biotite, chlorite, tourmaline,sphene, disthene. Mineral distribution suggests that metamorphic Menderes Masif is the importantterrestrial geological source. Occurrences of high biotite contents along the wawe marks indicate thatgrains are transported not only through rolling but also lateral sliding on waves. The concentrations of Ti(<3.08 %), Fe (<16,45 %) and Mn (< 6346 ppm) when compared with average sandstones are relativelyhigh and this data can be used for ore-mineral exploration on land
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