1,720,960 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Analisis Harmonisa Pengaruh Rekonfigurasi Sistem Distribusi AC Menjadi DC Pada Kapal Tanker Berbasis Simulasi
Get PDFRekonfigurasi sistem distribusi AC menjadi DC merupakan cara untuk meningkatkan effisiensi penggunaan bahan bakar pada diesel generator kapal. Dengan merekonfigurasi sistem distribusi maka rugi-rugi yang dihasilkan pengaruh impedansi pada arus AC dapat dihilangkan. Namun, dalam merekonfigurasi sistem distribusi terdapat komponen tambahan yang dapat meningkatkan distorsi harmonisa dan total harmonic distortion (THD) pada sistem kelistrikan kapal, yaitu konverter. Peningkatan harmonisa ini memengaruhi kualitas daya yang dialirkan pada sistem karena bentuk gelombang mengalami perubahan tidak sinusoidal sempurna, sehingga peralatan listrik kapal dapat mengalami overheating yang dapat menurunkan performa dari peralatan listrik kapal. Pada penelitian ini dilakukan investigasi untuk mengetahui besaran harmonisa yang terjadi ketika kapal menggunakan sistem distribusi listrik DC. Gangguan harmonisa disimulasikan menggunakan software komputer, dengan memperhatikan empat kondisi operasional kapal. Dari hasil simulasi distribusi DC, distrorsi harmonisa yang terjadi pada bus generator panel sebesar, 11,23% THD pada kondisi sailing, 11,23% THD pada kondisi leaving/arriving, 11,23% THD pada kondisi loading-unloading, dan 11,23% THD pada kondisi at port. Berdasarkan dari standar IEEE 519-2014 batas dari distorsi harmonisa sebesar 8% THD, sehingga hasil simulasi distrorsi harmonisa pada sistem distribusi DC melebihi batas dan perlu dicari solusi untuk mengurangi distorsi harmonisa yang terjadi. Solusi untuk mengurangi distorsi harmonisa dalam penelitian ini adalah dengan cara pemasangan filter harmonisa, yaitu filter pasif single-tuned pada bus-bus yang melebihi batas standar. Setelah melakukan pemasangan filter harmonisa distorsi harmonisa yang terjadi pada bus generator panel mengalami penurunan menjadi, 0,53% THD pada kondisi sailing, 0,53% THD pada kondisi leaving/arriving, 0,53% THD pada kondisi loading-unloading dan 0,53% THD pada kondisi at port, sehingga distorsi harmonisa pada sistem distribusi DC sudah tidak melebihi batas standar IEEE 519-2014.
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The reconfiguration of the AC distribution system to DC is a way to increase the efficiency of fuel use in the ship's diesel generator. By reconfiguring the distribution system, the losses generated by the impedance effect on the AC current can be eliminated. In reconfiguring the distribution system, there are additional components that can increase harmonic distortion and total harmonic distortion (THD) in the ship's electrical system, namely the converter. This increase in harmonics affects the quality of the power delivered to the system because the waveform changes that are not perfectly sinusoidal, resulting in overheating of the electrical equipment which can reduce the performance of the ship's electrical equipment. The problem of harmonic distortion in the reconfiguration of the AC to DC distribution system needs to be solved. In this study, harmonic distortion is simulated using computer software, based on four-ship operating conditions. From the DC distribution simulation results, the harmonic distortion that occurs in the bus generator panel is 11.23% THD in sailing conditions, 11.23% THD in leaving/arriving conditions, 11.23% THD in loading-unloading conditions, and 11. 23% THD on at port condition. Based on the IEEE 519-2014 standard, the limit of harmonic distortion is 8% THD, so the simulation results of harmonic distortion in a DC distribution system exceed the limit and it is necessary to find a solution to reduce the harmonic distortion that occurs. The solution to reducing harmonic distortion in this research is by installing a harmonic filter on buses that exceed the standard limit with a filter type, namely a single-tuned passive filter. After installing the harmonic filter, the harmonic distortion that occurs on the bus generator panel has decreased to 0.53% THD in sailing conditions, 0.53% THD in leaving/arriving conditions, 0.53% THD in loading-unloading conditions, and 0, 53% THD in at port condition, so that the harmonic distortion in the DC distribution system does not exceed the IEEE 519-2014 standard limit
Book Review, Immigrant Japan: Mobility and Belonging in an Ethno-nationalist Society, by Gracia Liu-Farrer
Get PDFGracia Liu-Farrer’s Immigrant Japan: Mobility and Belonging in an Ethno-Nationalist Society is an intellectually stimulating invitation to rethink the traditional definition of immigrant country in an age of global mobility. The book provides the readers with rich narratives to understand how the immigration takes place in an immigrant society that emerged out of an ethno-nationalist one. Through the analysis of narratives of belonging and mobility, Liu-Farrer has shown how international migration occurs in non-traditional receiving countries, challenged the traditional definition of an immigrant country, and offered a promise of future Japan as an immigrant country. The book presents an essential addition to the literature on Japanese studies, area studies, and international migration and mobilities in Japan and beyond. It shows that micro-level individual narratives on mobility could pave the way to understanding transnationalism and connectivity at a larger scale as well as socio-cultural change taking place in a particular area. The book, finally, contributes to broadening the concept of an immigrant country, especially in the age of global mobility
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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
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