1,721,467 research outputs found
Hydrodynamic coefficients for a 3-dimensional uniform flexible barge using weakly compressible smoothed particle hydrodynamics (WCSPH)
No full textThe numerical modelling of the interactions between water waves and floating structures is significant for different areas of the marine sector, especially seakeeping and prediction of wave-induced loads. Seakeeping analysis involving severe flow fluctuations is still quite challenging even for the conventional RANS method. Particle method has been viewed as alternative for such analysis especially those involving deformable boundary, wave breaking and fluid fragmentation around hull shapes. In this paper, the Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH), a fully Lagrangian particle method, is applied to simulate the symmetric radiation problem for a stationary barge treated as a flexible body. This is carried out by imposing prescribed forced simple harmonic oscillations in heave, pitch and the 2- and 3-node distortion modes. The resultant, radiation force predictions, namely added mass and fluid damping coefficients, are compared with results from 3-D potential flow boundary element method and 3-D RANS CFD predictions, in order to verify the adopted modelling techniques for WCSPH. WCSPH were found to be in agreement with most results and could predict the fluid actions equally well in most cases
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
Uji Efektivitas Hayati Terhadap Pengendalian Jamur Ganoderma Pada Generasi Tiga Kelapa Sawit Di Kelas Kesesuaian Lahan Tiga PTPN IV Unit Air Batu
No full textPenelitian ini dilakukan pada bulan November 2016 sampai bulan Maret
2017 di jalan Piasa Hulu PT Perkebunan Nusantara IV Unit Air Batu Kecamatan
Tinggi Raja Kabupaten Asahan. Rancangan yang digunakan adalah Rancangan
Acak Kelompok (RAK) non faktorial dengan 3 ulangan dan terdiri dari 1 faktor
yang diteliti, yaitu : Pemberian Agen Hayati dengan 7 taraf, yaitu : MO1 = 50
liter/pohon/aplikasi pemberian Gano T2 pada media LCKS, MO2 = 50
liter/pohon/aplikasi pemberian Gano T2 pada media tankos, MO3 = 50
liter/pohon/aplikasi pemberian Decopalma pada media LCKS, MO4 = 50
liter/pohon/aplikasi pemberian Decopalma pada media tankos, MO5 = 50
liter/pohon/aplikasi pemberian Gano4 pada media LCKS, MO6 = 50
liter/pohon/aplikasi pemberian Gano4 pada media tankos dan MO0 = tanpa
perlakuan (kontrol). Data hasil pengamatan dilanjutkan dengan uji beda rataan
menurut Duncan (DMRT).
Hasil penelitian menunjukkan bahwa pemberian agen hayati menurunkan
tingkat serangan Ganoderma. Hal ini dapat dilihat adanya jamur yang mati akibat
aplikasi agen hayati. Aplikasi pemberian beberapa jenis agen hayati memberikan
pengaruh yang nyata pada peubah pengamatan jumlah tandan yang dipanen, berat
tandan, berat rata-rata tandan, jamur yang mati dan akar yang baru muncul pada
pengamatan (umur 2, 4, 6 dan 8 MSP)
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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