1,720,961 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
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
Fabrikasi dan Optimasi Sifat Fisis Film Nanokomposit NiFe2O4- Multiwalled Nanotube/PVA
No full textFabrication and characterization of NiFe2O4-MWNT/PVA nanocomposite film has been conducted. NiFe2O4-MWNT as a filler of nanocomposite film were gained using simple mixing method from solution containing Fe(NO3)3.9H2O, Ni(NO3) 2.6H2O and MWNT. The filler was mixed with Polyvinyl Alcohol (PVA) with some various concentrations and dried in room temperature for 24 hours. X-Ray Diffraction (XRD) analysis were used to determine the presence and the crystal size of NiFe2O4, LCR meter were used to determine the conductivity of each sample while VSM characterization were used to determine the magnetic properties of each samples. Analyses of XRD showed that the phase of NiFe2O4 were begin to formed especially in sample D (2.5 ml filler and 2.5 ml PVA). Based on electrical propeties using LCR meter, as increasing the consentration of the filler in nanocomposite film will also increase the conductivity of all sample, sample D has the biggest conductivity (1.92 x 10-6 S/cm) whereas based on M-H hysterisis graph from VSM characterization known that the addition of the filler can change the magnetic properties of each samples became paramagnetics
Hubungan Ekstrakurikuler Pramuka dan Mata Pelajaran Pendidikan Kewarganegaraan dengan Penumbuhan Karakter (Studi Persepsi Guru Kelas V Terhadap Siswa SDN di Kota Bogor)
Get PDFTujuan penelitian ini adalah 1) Untuk mendeskripsikan hubungan ekstrakurikuler pramuka dengan penumbuhan karakter siswa kelas V SD Negeri di Kota Bogor. 2) Untuk mendeskripsikan hubungan mata pelajaran PKn dengan penumbuhan karakter siswa kelas V SD Negeri di Kota Bogor. 3) Untuk mendeskripsikan hubungan ektrakurikuler pramuka dan mata pelajaran PKn dengan penumbuhan karakter siswa kelas V SD Negeri di Kota Bogor. Metode penelitian yang digunakan pada penelitian ini adalah metode survei. Hasil penelitian ini adalah: 1) Terdapat hubungan positif dan sangat signifikan antara Ekstrakurikuler Pramuka dengan Penumbuhan Karakter. Kekuatan hubungan antara Ekstrakurikuler Pramuka (X1) dengan Penumbuhan Karakter (Y) dengan koefisien korelasi ry1 = 0,736 dan koefisien determinasi r2y1 = 0,542. 2) Terdapat hubungan positif dan sangat signifikan antara Mata Pelajaran PKn dengan Penumbuhan Karakter. Kekuatan hubungan antara Mata Pelajaran PKn (X2) dengan Penumbuhan Karakter (Y) dengan koefisien korelasi ry2 = 0,646 dan koefisien determinasi r2y2 = 0,417, dan 3) Terdapat hubungan positif dan sangat signifikan antara Ekstrakurikuler Pramuka (X1) dan Mata Pelajaran PKn (X2) secara bersama-sama dengan Penumbuhan Karakter (Y). Kadar hubungan keduanya ditunjukkan dengan koefisien korelasi ry.12 = 0, 790 dan koefisien determinasi r2y.12 = 0,625 dengan demikian Ekstrakurikuler Pramuka dan Mata Pelajaran PKn secara bersama-sama mempunyai kontribusi sebesar 62,5% terhadap Penumbuhan Karakter
PENGARUH HIPOKSIA TERHADAP KADAR MALONDIALDEHID ORGAN GINJAL DAN DARAH TIKUS SPRAGUE-DAWLEY YANG DIBERI EKSTRAK DAUN RASPBERRY (Rubus idaeus L)
No full textStres oksidatif memiliki peran besar dalam patogenesis penyakit ginjal yang dapat
menyebabkan nekrosis pada jaringan ginjal. Stres oksidatif terjadi karena
peningkatan Reactive Oxygen Species (ROS). Hal ini akan menyebabkan
kerusakan pada polyunsaturated fatty acid (PUFA). Malondialdehyde (MDA)
merupakan hasil peroksidasi lipid, dan dapat digunakan sebagai biomarker untuk
mengetahui adanya kerusakan pada tubuh. Tanaman raspberry dapat menjadi
sumber antioksidan. Tujuan dari penelitian ini adalah untuk mengetahui efek
pemberian ekstrak daun raspberry terhadap kadar MDA darah dan ginjal tikus
Sprague-Dawley. Pada pemeriksaan in-vitro yaitu uji fitokimia, uji kapasitas
antioksidan dengan metode DPPH, total fenolik konten, total alkaloid konten, uji
tokisisitas menggunakan Brine Shrimp Lethality Test (BSLT), pemeriksaan secara
in-vivo yaitu pemeriksaan kadar MDA (Wills. E.D); tikus dibagi 2 kelompok,
yaitu kelompok yang dicekok ekstrak daun raspberry dan yang tidak dicekok
ekstrak daun raspberry, akan diberi perlakuan normoksia, hipoksia 1 hari, 7 hari
dan 14 hari. Dilakukan pemeriksaan histopatologi ginjal tikus Sprague-Dawley.
Hasil penelitian menunjukkan ekstrak daun raspberry memiliki kandungan
alkaloid, fenolik, antosianin, betasianin, glikosida, kardioglikosida, kumarin,
flavonoid, kuinon, steroid, terpenoid, tannin. Kapasitas total antioksidan IC50 yaitu
96,28 µg/mL, total fenolik konten 811,23 µg/mL, total alkaloid konten 72,24
µg/mL. Kadar toksik ekstrak daun raspberry 147,91 µg/mL, sehingga memiliki
potensi anti-kanker. Kadar MDA mengalami peningkatan dari kelompok
normoksia hingga hipoksia 14 hari. Kadar MDA pada kelompok yang dicekok
ekstrak daun raspberry lebih rendah dari kelompok yang tidak dicekok ekstrak
daun raspberry. Pemeriksaan histopatologi didapatkan nekrosis tubulus
proksimalis pada jaringan ginjal yang diberi perlakuan hipoksia baik yang dicekok
ekstrak daun raspberry maupun yang tidak dicekok ekstrak daun raspberry. Dapat
disimpulkan hipoksia menyebabkan kerusakan pada organ ginjal dan ekstrak
daun raspberry dapat menurunkan kadar MDA
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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