1,720,963 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
PENENTUAN KOEFISIEN DIFUSI LARUTAN GULA MENGGUNAKAN GRADIEN INDEKS BIAS DENGAN TEKNIK DEFLEKSI LASER DAN PENGOLAHAN CITRA
Full text linkKoefisien difusi larutan gula dapat ditentukan menggunakan gradien indeks bias yang diamati menggunakan defleksi sinar laser (Wiener’s Experiment). Pengukuran kedalaman defleksi berkas sinar laser yang melewati campuran larutan transparan memerlukan waktu pengamatan yang lama jika rentang daerah terjadinya defleksi laser semakin besar. Pengukuran secara manual juga sulit dilakukan jika kedalaman defleksi laser sangat kecil pada daerah tertentu akibat keterbatasan alat ukur dengan ketelitian yang tepat. Pengolahan citra memungkinkan kedalaman defleksi dapat ditentukan secara langsung serta memungkinkan pengukuran kedalaman defleksi yang kecil pada daerah tertentu.
Metode pengolahan citra yang digunakan dalam penelitian ini adalah segmentasi citra. Segmentasi citra terdiri atas pengelompokan citra Red, Green, dan Blue (RGB) dan thresholding. Citra defleksi laser yang terdiri atas tiga warna dasar (merah, hijau dan biru) dipartisi melalui pengelompokkan citra RGB sehingga diperoleh citra dengan warna dasar merah. Langkah selanjutnya melakukan thresholding citra untuk menentukan batas ambang intensitas cahaya citra. Citra dengan ambang batas yang sesuai kemudian didefinisikan posisinya menggunakan software Matlab R2012b.
Hasil yang diperoleh dari pengolahan citra tersebut berupa posisi pixel penyusun citra. Kedalaman defleksi dapat ditentukan dengan mengetahui posisi pixel citra. Kedalaman defleksi citra di setiap titik bervariasi bergantung nilai gradien indeks bias. Hubungan kedalaman defleksi citra dan gradien indeks bias digunakan untuk menentukan koefisien difusi larutan gula menggunakan pendekatan regresi linear. Hasil penelitian ini mendapatkan bahwa koefisien difusi larutan gula dalam air adalah ( ) untuk menit dan ( ) untuk menit. Hasil penelitian ini masih terbatas untuk konsentrasi awal larutan gula yang digunakan, yaitu 23 gram/200 ml dan waktu difusi lebih dari 35 menit. Pengolahan citra dalam penelitian ini dapat meminimalisir waktu pengukuran dengan memungkinkan nilai koefisien difusi yang diperoleh tetap akurat sesuai referensi.
Kata kunci: koefisien difusi, gradien indeks bias, defleksi laser, segmentasi citra, Wiener’s Experimen
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
Developing E-LKPD based on Creative Problem Solving to Enhance Higher Order Thinking Skills and Learner Autonomy in Topics Related to Progressive and Standing Waves
Full text linkThis study aims to produce a valid, practical, and effective E-LKPD utilizing Creative Problem Solving (CPS) approach to enhance both Higher Order Thinking Skills (HOTS) and the independent learning attitude of students in topics related to progressive and standing waves. The research method employed was Research and Development utilizing the 4-D development design model, which includes the phases: Define, Design, Develop, and Disseminate; however, Disseminate phase was not implemented. The validity of the E-LKPD CPS was assessed by material and media validators. Its practicality was evaluated based on the feasibility of implementing the E-LKPD CPS during the learning process as observed. The effectiveness of the E-LKPD CPS was determined through N-gain tests, while user response was gathered via response questionnaire. Data analysis was conducted using quantitative descriptive methods. The E-LKPD CPS was pilot-tested in a limited setting at MAN 2 Yogyakarta, involving 33 MIPA 1 as experimental group and another 33 as control group (MIPA 2). The E-LKPD CPS received validity scores of 97.47% from content experts and 95.48% from media experts, both considered very valid. Its practicality scored at 84.08% (good). The effectiveness of the E-LKPD CPS in enhancing HOTS was demonstrated with experimental group N-gain of 70.69%, compared to the control group's 63.70%, both deemed moderately effective. The effectiveness in fostering independent learning attitudes yielded N-gain of 74.28% for the experimental group and 67.23% for the control group, also rated as moderately effective. Student response was highly favorable at 91.33% (very good). Consequently, the developed E-LKPD CPS is declared valid, practical, and effective for implementation in educational settings
Verifikasi transisi atom argon dan uranium pada rentang panjang gelombang 590,0-610,0 nm menggunakan lampu lucutan katoda berongga U/Ar komersial dengan metode spektroskopi optogalvanik
No full textDispelling 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
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