1,720,989 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
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
ANALISIS KERAGAMAN GENETIK SAPI BALI DI SULAWESI SELATAN BERDASARKAN PERBEDAAN PERFORMANS DAN TOFOGRAFI MENGGUNAKAN RAPD-PCR
No full textPengetahuan mengenai breed hewan dengan ciri yang dapat diukur merupakan hal yang penting, karena dalam seleksi sangat menentukan dalam kelangsungan hidup generasi hewan tersebut. Secara alami respon hubungan fenotif dan genotif adalah tergantung pada tanda dan arah yang ditunjukkan dengan ciri tersebut.\ud
Dengan melihat kondisi dan penempilan sapi Bali di Sulawesi Selatan saat ini maka oleh beberapa peneliti telah mensinyalir terjadinya penurunan mutu sapi Bali di Sulawesi Selatan baik dari segi mutu genetik maupun produktivitasnya. Penurunan mutu genetik dan produkrivitas ternak salah satunya mungkin disebabkan karena peternak tidak memperhatikan faktor bibit, yaitu pejantan yang digunakan sebagai pemacek mempunyai kualitas genetik yang rendah. Oleh karena itu perlu dilakukan penelitian analisis keragaman genetik sapi Bali pada berbagai lokasi pemeliharaan yang berbeda dengan membandingkan ciri-ciri adanya perubahan performans sapi Bali asli dengan analisis DNA.\ud
Tujuan penelitian adalah untuk mendapatkan informasi tentang keragaman genetik sapi Bali dengan menggunakan analisis DNA dengan metode Polymerase Chain Reaction-random Amplified Polimorphic DNA (PCR-RAPD) di Sulawesi Selatan khususnya pada peternak plasma pembibitan/pemurnian sapi Bali.\ud
Metode RAPD-PCR ini mampu menganalisa variasi genom suatu spesies dengan cepat dan efisien yang dapat diterapkan pada tanaman, serangga, unggas maupun hewan besar. Penelitian diawali dengan pengambilan sampel darah dari vena jugularis dari sapi Bali yang dipelihara di daerah kabupaten Bone dan Barru. Sampel darah kemudian diekstraksi DNA-nya, kemudian dilakukan amplifikasi dengan metode PCR-RAPD menggunakan 2 primer. Hasil PCR divisualisssssssssasi dengan elektroforesis. Kesamaan dan perbedaan genetik dianalisis statistik berdasarkan nilai Band Sharing Frequency (BSF).\ud
Elektroforesis hasil PCR-RAPD dengan primer 14 menghasilkan 9 pita dengan ukuran fragmen berkisar antara 200 ??? 1400 basepair, dengan pita polimorfik 7 pada sapi Bali di daerah/wilayah Sulawesi Selatan bagian Timur (Kabupaten Bone), sedangkan pada daerah bagian barat (Kabupaten Barru) sebanyak 6. Pada primer 17 hanya memperlihatkan 3 pita dengan ukuran fragmen berkisar antara 700 ??? 1100 basepair, dengan pita polimorfik masing-masing 1 pada sapi Bali di daerah Kabupaten Bone dan Barru. Jumlah pita yang bersifat polimorfik sapi-sapi Bali pada daerah Kabupaten Bone, dari 12 pita yang terbentuk 8 (66,7%) pita yang merupakan pita polimorfik. \ud
Ada indikasi bahwa keragaman sapi Bali di Sulawesi Selatan relatif rendah, hal ini ditunjukkan nilai BSF yang berkisar 0,7524. Namun demikian juga didapati beberapa individu dalam populasi di Kabupaten Bone secara genetik keragaman masih tinggi yang ditandai benyaknya pita-pita spesifik yang muncul pada individu ternak sapi tersebut. Keragaman geneti antara populasi sapi Bali di Kabupaten Bone dan Barru relatif kecil. Hal ini ditunjukkan dengan nilai BSF 0,9812
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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