1,720,991 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
Desain dan Uji Kinerja Modifikasi Pipa Absorber untuk Kolektor Surya Tipe CPC (Compound Parabolic Collector).
No full textPenelitian ini bertujuan untuk meningkatkan efektivitas perpindahan panas
pada kolektor surya tipe CPC menggunakan wire coil dan wiremesh pada sisi dalam
pipa absorber. Perbandingan antara rasio pitch dengan diameter dalam pipa (p/d)
dan nilai rasio diameter wire dengan diameter dalam pipa (e/d) merupakan aspek
penting dalam proses perancangan wire coil. Kedua nilai tersebut adalah 1 dan
0.125. Pada perancangan pipa absorber dengan wiremesh, ukuran pori dan
porositas merupakan aspek penting yang diperhatikan. Adapun wiremesh yang
digunakan mempunyai ukuran 50 pori/inci2 dengan porositas 0.963. Pengujian
dilakukan pada pipa absorber standar, pipa absorber dengan wire coil, dan pipa
absorber dengan wiremesh. Ketiga pipa tersebut dirangkai pada kolektor surya tipe
CPC. Variasi dari debit fluida yang diuji adalah 1 L/menit hingga 6 L/menit. Hasil
pengujian menunjukkan bahwa rata–rata kenaikan suhu tertinggi adalah 1.06 oC
untuk pipa absorber dengan wire coil. Nilai rata – rata kenaikan suhu tertinggi
untuk pipa absorber dengan wiremesh adalah 0.95 oC. Berdasarkan uji anasilis
ragam (ANOVA) dan uji lanjut (post-hoc test) dengan metode uji Tukey, jenis pipa
terbaik adalah pipa absorber dengan wire coil yang ditunjukkan dengan
perbandingan nilai rataan, yaitu 37.20%
Desain dan Uji Kinerja Portable Mini Chiller
No full textMini chiller yang terdapat dipasaran umumnya masih memerlukan ruang yang
cukup besar sehingga terdapat kesulitan dalam pemindahan mini chiller dengan kapasitas
pendinginan yang belum dapat disesuaikan sesuai dengan kebutuhan dan masih
menggunakan energi yang besar serta kurang ramah terhadap lingkungan. Untuk itu,
perlu dilakukan perancangan dan uji kinerja portable mini chiller yang dapat dipindahpindahkan
dengan kapasitas pendingin yang dapat disesuaikan sesuai kebutuhan, dan
lebih hemat energi serta ramah terhadap lingkungan. Portable mini chiller dirancang
menggunakan empat komponen utama siklus kompresi uap yaitu kompresor, kondensor,
katup ekspansi (needle valve), dan evaporator serta komponen pendukung lain seperti oil
separator, dryer filter, accumulator, pipa tembaga, penghubung pipa tembaga (elbow dan
nepel), dan pressure gauge. Hasil pengujian menunjukkan portable mini chiller yang
telah dirancang memiliki ukuran 1.18 m x 1 m x 0.95 m sehingga memudahkan dalam
hal pemindahannya dengan kapasitas pendinginan yang dapat disesuaikan sesuai
kebutuhan, lebih hemat energi dan lebih ramah terhadap lingkungan karena menggunakan
refrigerant yang tidak merusak lapisan ozon atau Ozone Depleting Potential (ODP = 0)
dan tidak menimbulkan efek pemanasan global atau Global Warming Potential (GWP
kecil). Waktu yang dibutuhkan mini chiller untuk mendinginkan beban pendinginan
dengan variasi tekanan 1 bar, 1.5 bar, dan 2 bar berturut-turut sekitar 575 detik, 531 detik,
dan 547 detik. Delta suhu air panas saat bersirkulasi pada PHE dengan laju aliran air 3
l/menit pada variasi tekanan 1 bar, 1.5 bar, dan 2 bar berturut-turut sebesar 4.74 ̊C, 4.88 ̊C,
dan 6.08 ̊C. Pengukuran rata-rata daya kerja kompresor dengan variasi tekanan 1 bar, 1.5
bar, dan 2 bar berturut-turut sebesar 550 Watt, 560 Watt, dan 600 Watt. NTU (Number
Transfer Units) yang dihasilkan dengan variasi tekanan 1 bar, 1.5 bar, dan 2 bar berturutturut
sebesar 6.58, 6.45, dan 7.72. COP (Coefficient of Performance) rata-rata yang
dihasilkan dengan variasi tekanan 1 bar, 1.5 bar, dan 2 bar berturut-turut sebesar 2.47,
2.53, dan 3.13. Sedangkan batas minimum COP dari refrigeran-134a adalah sebesar 2.5
sehingga dapat diketahui bahwa pada tekanan 1.5 bar dan 2 bar bisa dapat
direkomendasikan dalam pengunaan portable mini chiller
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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