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    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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

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    We 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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    ADAPTATION OF PORT WASTE RECEPTION FACILITIES TO BALLAST WATER TREATMENT SYSTEM: TURKISH PORT PERSPECTIVE

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    The introduction of invasive marine species into a new environment by ballast water attached to ship hulls has been identified as one of the four greatest threats to the world's oceans. Ballast water is water carried by ships to ensure stability, trim, and structural integrity. Shipping transports over 80% of the world's commodities, and each year transfers approximately 3 to 5 billion tons of ballast water internationally, which is, absolutely essential to the safe and efficient operation of modern shipping, providing balance and stability to unladen ships. However, it may also pose a serious ecological threat to the marine environment. The transferred species including bacteria, microbes, small invertebrates, eggs, cysts and larvae of various species may survive to establish a reproductive population in the host environment, becoming invasive, out-competing native species, and multiplying into pest proportions. Ballast water treatment is a technology for the treatment of ship ballast water from aquatic invasive species. Port waste reception facility should be modified to include ship ballast water treatment during this transitional phase until 2017. It provides onshore facilities in ports or terminals to transfer ballast water for cleaning or storage. This paper describes ballast water management, in general, and gives perspectives for the Turkish ports, and briefly suggests that the waste reception facilities must be modified for ballast water treatment

    Sediment Wastes from Ship Tanks and Waste Management of Shipyards

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    5th Eurasian Waste Management Symposium (EWMS) -- OCT 26-28, 2020 -- Istanbul, TURKEYSediment is the accumulation of sand and dirt that settles at the bottom of lake or the sea. Sediments are not only transported by water, but also the wind and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Sediment's accumulation can cause some problems (i.e. cost increase in ship operation, tank corrosion, invasive species' transport) in ballast tanks. Ships should deliver dispose of sediments to shipyards and report in their annual or intermediate survey. The International Convention for the Control and Management of Ships' Ballast Water and Sediments (BWM Convention) was adopted in 2004 by consensus at a Diplomatic Conference organized at International Maritime Organization (IMO) Headquarters in London. And then, many guidelines were evolved to facilitate the implementation of BWM convention. For the control and management of ships' ballast water and sediments, BWM convention was split up into an annex and some articles including technical standards and requirements in the regulations. According to the convention, all shipyards must clean or repair ballast tanks, adequately built and safely operate, collect and dispose of sediments. In this study, authors investigate World and Turkish Shipyards which receive sediments from ships, prepare Sediment Management Plan for these shipyards and report about how many shipyards have completed responsibilities of the BWM convention.Yildiz Tech Univ, Environm Engn Dept,ISTAC Inc,Int Waste Working Grp,T C Cevre Sehircili Bakanligi,Turkish Airlines,Istanbul Convent & Visitors Bur,Cevre Norm,Artemis Aritim,Eced Cevre Danismanlik Muhendislik Hizmetleri San Ve Tic Ltd Sti,Ciftligim Gubre,MSB ARGE Cevre Enerji Teknolojileri Muh Egitim Dans Ltd Sti,Tin Muhendislik,Muhendislik Ar Ge Egitim & Danismanlik Ltd Sti,Aktan,GalaksiIstanbul Technical University Scientific Research Office (BAP) [MUA-2018-41105]This study was supported by the project (numbered as MUA-2018-41105 and titled as Turk Tersaneleri icin Sediman Atik Alim Tesisi Modeli Gelistirilmesi) funded by Istanbul Technical University Scientific Research Office (BAP)
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