1,721,449 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
KAJI SIFAT FISIK DAN MEKANIK BIOKOMPOSIT PLA DAN CaO DARI KERANG LOKAN DENGAN MEDIA PELELEHAN VCO
No full textPenambahan serbuk CaO diharapkan dapat membantu proses pengobatan
pada tulang sehingga tidak memerlukan tindakan oprasi ke dua untuk pengangkatan
implan. Penelitian ini bertujuan untuk menganalisa pengaruh variasi penambahan
CaO ke dalam PLA dengan media pelelehan VCO dan menganalisa pengaruh waktu
natural aging terhadap kekuatan mekanik dan fisik.
Bahan penelitian terdiri dari PLA, VCO dan CaO yang bersifat degradable,
tetapi sebagaimana polimer, dalam Poly Lactic Acid (PLA) tergantung pada tingkat
atau jumlah molekul. PLA dan serbuk CaO dicampur, dengan VCO sebagai pelarut.
serbuk CaO 100 mesh dibuat dari cangkang kerang lokan yang dikalsinasi selama
6 jam pada suhu 900°C. VCO dipanaskan pada 150°C, PLA leleh dengan 10 menit.
CaO dengan komposisi 0%, 5%, 10% dan 15% diaduk hingga merata, dituangkan
ke dalam cetakan dengan penekanan 50 kg. Kemudian dilakukan natural aging
selama 7 dan 15 hari, pengujian tarik, kekerasan, densitas dan daya serap air
diberikan pada sampel-sampel setelahnya.
Hasil penelitian menjelaskan bahwa semakin banyak penambahan serbuk
CaO dapat mengurangi nilai kekuatan tarik komposit tetapi, diperoleh hasil yang
berbeda dari pada nilai kekerasan, densitas dan daya serap air yang mengalami
peningkatan seiring dengan bertambahnya campuran serbuk CaO dan semakin lama
waktu natural aging maka sifat mekanik dan fisik komposit semakin baik. kekuatan
tarik yang tertinggi 6.11 MPa pada komposisi PLA 95% dan CaO 5% setelah
natural aging 15 hari, kekuatan tarik terendah 1.64 MPa pada komposisi PLA 85%
dan CaO 15% setelah natural aging 7 hari. Kekerasan tertinggi yaitu pada
komposisi PLA 85% dan CaO 15% sebesar 94 SHA setelah natural aging 15 hari,
kekerasan terendah pada komposisi PLA 95% dan CaO 5% 92.2 SHA setelah
natural aging 7 hari. Densitas tertinggi pada komposisi PLA 85% dan CaO 15%
sebesar 1.45 g/cm3
setelah natural aging selama 7 hari, dan densitas terendah pada
komposisi CaO 0% sebesar 0.9 g/cm3
setelah natural aging 7 hari. Daya serap air
tertinggi 20.42 % pada komposisi PLA 85% dan CaO 15% setelah natural aging
selama 7 hari, dan daya serap terendah 0% komposisi 0% CaO.
Kata kunci: Implan, PLA, CaO, VCO, Komposi
PENGARUH SiO2 DARI FLY ASH DAN CaO DARI CANGKANG KERANG TERHADAP DENSITAS DAN DAYA SERAP AIR BATAKO
Get PDFBatako merupakan bahan bangunan yang terdiri dari campuran semen dan agregat. Semen mempunyai dampak buruk terhadap lingkungan yaitu sebagai salah satu penyumbang emisi CO2 terbesar. Sebaliknya pembakaran batu bara di PLTU menghasilkan limbah fly ash. Penelitian ini bertujuan untuk membuat batu bata dari campuran fly ash dan CaO. Batako dibuat dengan penambahan SiO2 sebesar 7,5; 10; 12,5 dan 15% dan CaO sebesar 2,68; 3,35; 4,02 dan 4,69%. Dengan penambahan 15% SiO2 dan 2,68% CaO diperoleh nilai massa jenis batako sebesar 1,64 g/cm2. Dengan penambahan 15% fly ash dan 7% CaO diperoleh nilai berat jenis batako sebesar 1,69 g/cm2. Semakin banyak fly ash yang ditambahkan maka nilai densitas pada bahan penambah akan semakin rendah, sedangkan penambahan CaO lebih banyak dapat meningkatkan densitas batu bata. Pada uji serapan air dan porositas, penambahan SiO2 10% dan CaO 4,02% sudah optimal. SiO2 dan CaO bereaksi membentuk kalsium silikat hidrat yang dapat mengecilkan pori-pori batu bata sehingga daya serap air menjadi rendah
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
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
- …
