1,720,975 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
Isolasi dan Karakterisasi Gen merB pada Bakteri Pseudomonas sp. Sebagai Gen ResistensiMerkuriOrganik
Full text linkPatogenesis penyakit dimana merkuri sebagai agen penyebab akan melewati komponen lingkungan sebagai media transmisi sebelum sampai pada manusia. Terdapat beberapalokasi pertambangan emas rakyat di Sulawesi Utarayang menggunakanmerkuri. Tujuan penelitian ini untuk mengidentifikasi jenis bakteri yanghidup pada sedimentanahtercemar merkuri, mengisolasi dan mengidentifikasi karakter gen merB pada bakteritersebut. Dilakukan uji resistensi pada fenil merkuri, identifikasi Gram dan 16S rRNA, amplifikasi dan sekuensing gen merB, pensejajaran dan pembuatan pohonfilogenetik gen merB pada isolat bakteri resisten fenil merkuri. Terdapat 2 isolat bakteri Pseudomonas sp. yang resisten terhadap fenil merkuri. Gen merB pada bakteri ini mempunyai homologi sebesar 98-100% dibandingkan dengan gen merB pada bakteri yang terdapat pada GenBank. Sisi aktif enzim organomerkuri liase (MerB) yang dikode oleh gen merB pada posisi Cys-96, Cys-159 dan Asp-99 tetap dipertahankan oleh gen merB kedua isolat bakteri hasil penelitian. Terdapat 3 tempat perbedaan nukleotida merB antara keduaisolat hasil penelitian dengan P. aeruginosa galur ARY1. Terjadi mutasi substitusi transisi pada merB posisi Val-124 (GTC?GTT) dan Val-136 (GTT?GTC) maupun Glu-132 (GAG) ?Gly-132 (GGG) dimana isolat 2B.2 dan 4B.2 Pseudomonas sp. sama dengan Klebsiella sp. ND3 tapi berbeda dengan P. aeruginosa galur ARY1 walaupun genus yang sama. Walaupun asam amino glutamat diganti oleh glisin yang berbeda sifatpolaritas tapi tidak berpengaruh pada aktifitas bioremediasi karena tempat tersebut bukan merupakan sisi aktif. Gen merB terdapat pada isolat bakteri lokal, Pseudomonas sp., di Sulawesi Utara. Penelitian ini perlu dilanjutkan untuk menghasilkan kloning enzim MerB(organomerkuri liase) dalam mengatasi masalah pencemaran merkuri. Patogenesis penyakit dimana merkuri sebagai agen penyebab akan melewati komponen lingkungan sebagai media transmisi sebelum sampai pada manusia. Terdapat beberapalokasi pertambangan emas rakyat di Sulawesi Utarayangmenggunakanmerkuri. Tujuan penelitian ini untuk mengidentifikasi jenisbakteri yanghidup pada sedimentanahtercemar merkuri, mengisolasi danmengidentifikasi karakter gen merB pada bakteritersebut.Dilakukan uji resistensi pada fenil merkuri, identifikasi Gram dan 16S rRNA,amplifikasi dan sekuensing gen merB, pensejajaran dan pembuatan pohonfilogenetik gen merB pada isolat bakteri resisten fenil merkuri.Terdapat 2 isolat bakteri Pseudomonas sp. yang resisten terhadap fenil merkuri.Gen merB pada bakteri ini mempunyai homologi sebesar 98-100% dibandingkandengan gen merB pada bakteri yang terdapat pada GenBank. Sisi aktif enzimorganomerkuri liase (MerB) yang dikode oleh gen merB pada posisi Cys-96,Cys-159 dan Asp-99 tetap dipertahankan oleh gen merB kedua isolat bakterihasil penelitian. Terdapat 3 tempat perbedaan nukleotida merB antara keduaisolat hasil penelitian dengan P. aeruginosa galur ARY1.Terjadi mutasi substitusi transisi pada merB posisi Val-124 (GTC?GTT)danVal-136 (GTT?GTC) maupun Glu-132 (GAG) ?Gly-132 (GGG) dimanaisolat 2B.2 dan 4B.2 Pseudomonas sp. sama dengan Klebsiella sp. ND3 tapiberbeda dengan P. aeruginosa galur ARY1 walaupun genus yang sama.Walaupun asam amino glutamat diganti oleh glisin yang berbeda sifatpolaritastapi tidak berpengaruh pada aktifitas bioremediasi karena tempat tersebut bukanmerupakan sisi aktif.Gen merB terdapat pada isolat bakteri lokal, Pseudomonas sp., di SulawesiUtara. Penelitian ini perlu dilanjutkan untuk menghasilkan kloning enzimMerB(organomerkuri liase) dalam mengatasi masalah pencemaran merkuri
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
ANALISIS MUTASI GEN PROTEIN X VIRUS HBV PADA PENDERITA HEPATITIS B AKUT DI MANADO
Full text linkFaktor-faktor yang mempengaruhi perkembangan hepatitis B kronis menjadi kanker hati antara lain mutasi pada gen x. Penelitian ini bertujuan untuk mengidentifikasi gen protein x virus HBV dan menganalisis apakah terjadi mutasi gen yang terkait dengan munculnya tumor ganas sirosis hati (HCC). Penelitian ini menggunakan primer untuk proses nested PCR yang telah dirancang sebelumnya. Proses nested PCR terhadap 10 sampel DNA HBV pasien dilakukan untuk mengamplifikasi fragmen DNA gen x dilanjutkan dengan sekuensing untuk penentuan urutan nukleotida gen x. Urutan nukleotida gen x diterjemahkan menjadi urutan asam amino protein x. Terhadap hasil penentuan urutan asam amino protein x, dianalisis apakah terdapat keberadaan mutasi dikaitkan dengan hepatitis B akut. Identifikasi molekuler menunjukkan bahwa dari 10 sampel DNA HBV pasien yang uji, 5 sampel yang berhasil ditentukan urutan nukleotida gen xnya. Hasil analisis mutasi gen, ditemukan adanya mutasi gen protein x, tapi tidak ada satupun ditemukan adanya mutasi yang terkait dengan HCC.Kata kunci : Virus HBV, mutasi Gen x, Hepatitis B akut, Manad
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