1,720,964 research outputs found
Chama aspersa Reeve, 1846 (Bivalvia : Chamidae) another established Lessepsian invader in the Mediterranean Sea
No full textVolume: 8Start Page: 27End Page: 2
Circulus octoliratus (Carpenter, 1856) and Phosinella digera (Laseron, 1956): two new non-indigenous gastropod species for the Mediterranean Sea
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On the discovery of Crithe cossinea T. Cossignani, 1997, a new marine alien species for the Mediterranean Sea, with additions and remarks on 15 unreported molluscan species from Turkey coast
Full text linkThe whole molluscan assemblages along the Turkish coasts of the Aegean Sea and the Levantine Sea (Southern Turkish coasts), were studied from 20 stations at depths ranging from 11 m to 69 m, between August and October 2014. This has resulted in new contribution to Mediterranean marine molluscan fauna. Crithe cossinea is a new lessepsian for the Mediterranean Sea, five Gastropoda (Melanella alba, Mangelia callosa, Mangelia tenuicosta, Clathromangelia loiselieri, Raphitoma bicolor) are new records for Turkish Seas, two Gastropoda (Ondina obliqua, Retusa nitidula) are new records for the Aegean Sea while another two Gastropoda (Alvania hispidula, Vexillum hypatiae) are new records for the Turkish coast of the Aegean Sea and four Gastropoda (Cerithiopsis fayalensis, Bela menkhorsti, Raphitoma aequalis, and the alien species Monotygma fulva) are new records for the Turkish coasts of Levantine Sea. Among Bivalvia species, Thyasira alleni is a new record for both seas and Pitar mediterraneus is a new record for the Turkish coasts of Levantine Sea. The present study contributes to molluscan fauna of Turkish waters by the addition of six more species, increasing their number to 1076.Ministry of Environment and Urbanization/General Directorate of EIA, Permitsand Control/Environmental Reference LaboratoryThis work has been supported by the Ministry of Environment and Urbanization/General Directorate of EIA, Permitsand Control/Environmental Reference Laboratory and coordinated by TUBITAK Marmara Research Centerthrough Integrated Marine Pollution Monitoring (2014-2016) Project. The authors are grateful to the Captains and crew members of the research vessels (TUBITAK MAM and Bilim II). The authors wish to thank Dr. A. Zenetos who provided invaluable advice. The first author's deepest gratitude is to Dr. M.A. Pancucci Papadopoulou for her patient help in preparing the manuscript, enlightening guidance, profound comments and suggestions
Seasonal Variations and Structure of the Molluscan Assemblage in the Canakkale Strait (Turkey)
Full text linkThe molluscan assemblage of the Canakkale Strait (Turkish Strait System) was studied at depths ranging from 10 to 22 m, by means of the van Veen grab seasonally during 2006 and also at 7 stations, that are located in the middle part of the Canakkale Strait, at depths ranging from 40 to 83 m by means of box-core, van Veen grab and dredge during the summer of 2007. A total of 283 species were found in the strait. Krachia cylindrata (Jeffieys, 1885) was newly recorded in the East of the Mediterranean Sea and a total of 5 species [Cerithiopsis scalaris (Locard, 1892), Melanella monterosatoi (Monterosato, 1890), Bela fuscata (Deshayes, 1835), Mangelia melitensis Cachia and Mifsud, 2008 and Cylichnina laevisculpta (Granata-Grillo, 1877)] were newly recorded in the Turkish Seas. Furthermore, 37 mollusc species were newly recorded in the Turkish Strait System and 140 more species were recorded for the first time from the Canakkale Strait. Bittium reticulatum (da Costa, 1778) and Mytilus galloprovincialis Lamarck, 1819, were the most important species, representing 52% of the total 37024 specimens. No seasonal differences were found, while hydrodynamic conditions seem to be the factor controlling Mollusca recruitment in the Canakkale Strait
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
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