1,720,963 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
Efektivitas Larutan Ekstrak Belimbing Wuluh (Averrhoa bilimbi L.) terhadap Penghilangan Stain Ekstrinsik Gigi Pasca Ekstraksi (kajian ex vivo).
Get PDFSubstansi warna atau kromogen dari makanan dan minuman seperti kopi dapat melekat pada permukaan gigi melalui pelikel dan membentuk deposit yaitu stain ekstrinsik pada permukaan gigi. Stain ekstrinsik ini menjadi masalah estetik dan predisposisi terjadinya penyakit periodontal. Buah Belimbing Wuluh (Averrhoa bilimbi L.) memiliki kandungan asam oksalat yang berpotensi untuk menghilangkan stain esktrinsik gigi melalui mekanisme oksidasi. Penelitian ini bertujuan untuk mengetahui efektivitas larutan ekstrak belimbing wuluh (Averrhoa bilimbi L.) terhadap penghilangan stain ekstrinsik pada permukaan gigi pasca ekstraksi melalui kajian ex vivo. Desain penelitian adalah true experimental dengan pre test-post test with control group design. Dua puluh empat sampel gigi premolar pasca ekstraksi yang terbagi dalam 4 kelompok direndam dalam kopi untuk membentuk stain ekstrinsik selama 14 hari. Kelompok kontrol dengan saliva buatan, dan perlakuan dengan ekstrak belimbing wuluh konsentrasi 50%, 75%, dan 100% selama 28 jam. Pengambilan foto menggunakan kamera HP Samsung Galaxy S10 pengaturan manual, ISO 50, aperture F2.4, focal length 4.32 mm, shutter speed 8, jarak objek 20 cm di dalam mini studio dilakukan setelah terbentuk stain ekstrinsik dan setelah perlakuan. Adobe Photoshop CC 2018 digunakan untuk mengetahui selisih intensitas warna (ΔE) dalam sistem CieLAB. Hasil analisis one way ANOVA menunjukan perbedaan nilai intensitas warna (ΔE) yang signifikan (p<0,05) antar kelompok. Hasil analisis Post Hoc menunjukan perbedaaan nilai intensitas warna (ΔE) yang signifikan (p<0,05) antara masing-masing kelompok dengan nilai terbesar pada kelompok konsentrasi 100%. Hasil uji korelasi pearson menunjukan bahwa terdapat korelasi positif yang signifikan antara konsentrasi ekstrak dengan selisih intensitas warna (ΔE). Kesimpulan penelitian ini adalah larutan ekstrak belimbing wuluh efektif terhadap penghilangan stain ekstrinsik gigi pasca ekstraksi (kajien ex vivo
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
Identifikasi dan Kloning Gen CalBsyn ke dalam Plasmid pJ912-AGα-RFP di Escherichia coli
No full textSistem tampilan permukaan khamir telah menjadi teknik yang semakin
popular untuk rekayasa protein dan pembuatan pustaka protein. Protein heterolog
yang ditampilkan pada permukaan sel khamir diekspresikan dalam bentuk fusi
dengan suatu protein penahan atau protein permukaan. Protein CALB (Candida
antratica Lipase B) yang disandikan oleh gen sintetik CalBsyn dapat ditingkatkan
efektivitasnya melalui ekspresi pada permukaan sel khamir. Plasmid pJ912-AGα-
RFP mengandung gen penyandi protein permukaan, AGα (Agglutinin-α) dan gen
penyandi protein penanda ekspresi, RFP (Red fluorescent protein). Penelitian ini
bertujuan untuk memperoleh konstruksi vektor pJ912-AGα-RFP-CalBsyn untuk
ekspresi protein CALB rekombinan pada permukaan sel khamir Pichia pastoris
melalui kloning gen CalBsyn ke dalam plasmid pJ912-AGα-RFP pada Escherichia
coli. Gen CalBsyn tanpa sinyal sekresi natifnya diperoleh dari plasmid pJ912-
CALB melalui amplifikasi PCR menggunakan pasangan primer mCalB-Sal-F dan
mCalB-His-Sal-R. Gen mCalBsyn yang diperoleh berukuran panjang 1004 bp. Baik
gen mCalBsyn maupun plasmid pJ912-AGα-RFP dipotong dengan enzim restriksi
SalI, kemudian diligasi dan ditransformasi ke dalam E. coli dengan metode kejut
panas. Transformasi menghasilkan 11 koloni transforman putatif yang selanjutnya
dipurifikasi menjadi koloni-koloni tunggal. Analisis PCR dengan primer AOX1-F
dan mCalB-His-Sal-R menunjukkan adanya 34 koloni tunggal dari klon yang
dianalisis terindikasi positif membawa plasmid rekombinan pJ912-AGα-RFPCalBsyn
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
- …
