1,720,960 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
Alginate-ZnO-Poly(ethylene glycol) Dimethacrylate (PEGDMA) via Interpenetrating Polymer Network as a Functional Material for Wound Dressing
Full text linkAlginate is a biopolymer that has been widely applied as a wound dressing material. To increase the mechanical and antibacterial properties of a wound dressing material, nanoparticles and synthetic polymers are used to modify alginate. One of the materials synthesized into nanoparticles is ZnO, which has potential applications in the medical field because of its good antibacterial properties. On the other hand, PEGDMA has not been widely used in the medical field, opening opportunities to develop research, especially regarding wound dressing materials. However, there has never been a detailed report on the modification of alginate using ZnO and PEGDMA. In this paper, alginate was modified using ZnO and poly(ethylene glycol) dimethacrylate (PEGDMA; alginate–ZnO–PEGDMA, AZP), which was synthesized using the Interpenetrating Polymer Network (IPN) method. AZP can increase a wound dressing material’s mechanical properties by 78% and the antibacterial properties by 94%, which indicates that alginate modification with ZnO and PEGDMA produces high-performance wound dressing materials
Sintesis dan karakterisasi poly (Anthranilic Acid-Co-Formaldehyde) untuk adsorpsi ion Pb(II)
Full text linkSelain memberikan dampak positif, perkembangan industri yang pesat juga dapat memberikan dampak negatif berupa limbah industri penyebab pencemaran lingkungan. Timbal merupakan salah satu ion logam berat yang menjadi indikator primer pencemaran menurut United States Environmental Protection Agency (US EPA). Penentuan konsentrasi timbal secara langsung dalam sampel lingkungan seringkali sulit dilakukan karena terdapat pada konsentrasi renik dengan matriks yang rumit. Oleh karena itu, teknik prakonsentrasi yang dapat menyederhanakan matriks sangat diperlukan. Resin penukar ion, resin pengkhelat, dan ion imprinted polymers banyak digunakan untuk prakonsentrasi unsur renik. Poly (anthranilic acid-co-formaldehyde) merupakan polimer yang disintesis dengan cara mencampurkan asam anthranilat, formaldehida, dan HCl. Karakterisasi poly(anthranilic acid-co-formaldehyde) telah dilakukan menggunakan FTIR dan SEM. Hasil karakterisasi mengindikasikan bahwa reaksi polimerisasi telah terbentuk yang ditunjukkan dengan adanya vibrasi CH2 bridge. Poly (anthranilic acid-co-formaldehyde) memiliki morfologi permukaan yang relatif halus dan berpori. Metode yang digunakan untuk mempelajari kemampuan adsorpsi adalah metode batch. Kapasitas adsorpsi poly (anthranilic acid-co-formaldehyde) terhadap ion Pb(II) adalah 16,37 mg/g pada pH 5 dengan waktu kontak 10 menit
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
Sintesis dan Karakterisasi SiO2@APTES-IIP Sebagai Material Fungsional Penjerap Ion Kadmium(II)
No full textSintesis SiO2@APTES-IIP dan SiO2@APTES-NIP melalui proses sol-gel melibatkan 3-amounium propyl triethoxy silane (APTES) sebagai monomer fungsional, tetraethylorthosilicate (TEOS) sebagai crosslinker, Cd (II) sebagai cetakan dan SiO2 sebagai inti. Karakterisasi SiO2@APTES-IIP dan SiO2@APTES-NIP dilakukan dengan menggunakan FTIR. Hasil karakterisasi dengan FTIR menunjukkan beberapa puncak penting pada bilangan gelombang 2939 cm-1 dan 1411 cm-1 yang berasal dari vibrasi gugus C-H serta pada bilangan gelombang 1564 cm-1 yang berasal dari vibrasi gugus N-H hal tersebut membuktikan bahwa silika gel telah berhasil terfungsionalisasi oleh monomer APTES. Morfologi dan komponen penyusun material SiO2@APTES-IIP dianalisis menggunakan SEM dan EDS. Berdasarkan metode batch SiO2@APTES-IIP memiliki kapasitas retensi sebesar 7,34 mg/g pada kondisi optimum pH 7 dan waktu kontak 90 menit. Hasil analisis menunjukkan bahwa, model isoterm adsorpsi mengikuti model isoterm adsorpsi Langmuir
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
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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