1,721,921 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
UJI AKTIVITAS ANTIBAKTERI SENYAWA 5,7-DIHIDROKSIFLAVANON DARI EKSTRAK ETHANOL TEMU KUNCI (Boesenbergia pandurata) TERHADAP BAKTERI Escherichia coli ATCC 11229 DAN Staphylococcus epidermidis FNCC 0048 SECARA IN VITRO
Get PDFPenelitian ini bertujuan untuk mengetahui aktivitas antibakteri senyawa 5,7-dihidroksiflavanon dari ekstrak ethanol Temu Kunci (Boesenbergia pandurata) terhadap bakteri Escherichia coli ATCC 11229 dan Staphylococcus epidermidis FNCC 0048 serta untuk mengetahui konsentrasi senyawa 5,7-dihidroksiflavanon yang memiliki aktivitas antibakteri optimum terhadap kedua bakteri. Uji aktivitas antibakteri dilakukan dengan metode difusi agar paper disc (Kirby Bauer). Aktivitas antibakteri dibuktikan dengan adanya zona hambat bening di sekitar paper disc. Konsentrasi senyawa 5,7-dihidroksiflavanon yang digunakan dalam penelitian ini yaitu 0,5 ppm, 5 ppm, 50 ppm, 250 ppm, dan 500 ppm. Kontrol positif menggunakan kloramfenikol dan kontrol negatif menggunakan DMSO. Kekuatan zona hambat senyawa 5,7-dihidroksiflavanon terhadap Escherichia coli ATCC 11229 tergolong kuat sedangkan Staphylococcus epidermidis FNCC 0048 memiliki kekuatan zona hambat sedang sampai dengan kuat. Konsentrasi optimum senyawa 5,7-dihidroksiflavanon untuk E. coli ATCC 11229 pada konsentrasi 500 ppm dan S. epidermidis FNCC 0048 pada konsentrasi 0,5 ppm.Kata kunci : Antibakteri, 5,7-dihidroksiflavanon, temu kunci, Escherichia coli ATCC 11229, Staphylococcus epidermidis FNCC 004
THE ANTIBACTERIAL ACTIVITY OF CURCUMA XANTHORRHIZA EXTRACT AGAINST ESCHERICHIA COLI ATCC 11229 AND STAPHYLOCOCCUS AUREUS ATCC 25923
No full textThe objective of this study were determining the antibacterial activity of Curcuma xanthorrhiza extract with various concentrations of 0,5 ppm, 5 ppm, 50 ppm, 250 ppm, and 500 ppm, and determining the effective concentrations of Curcuma extract antibacterial activity against Escherichia coli ATCC 11229 dan Staphylococcus aureus ATCC 25923. The results showed that the antibacterial activity of Curcuma xanthorrhiza extract with various concentrations of 0,5 ppm, 5 ppm, 50 ppm, 250 ppm, and 500 ppm showed antibacterial activity against Escherichia coli ATCC 11229 and Staphylococcus aureus ATCC 25923. The concentrations of Curcuma xanthorrhiza extract of 500 ppm effective against Escherichia coli ATCC 11229 which the diameter of inhibition by 10,37 mm and Staphylococcus aureus ATCC 25923 by 8,44 mm
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
Educación ambiental para la conciencia ecológica en estudiantes del quinto ciclo institución educativa N° 11229 - Mórrope
Get PDFLa presente investigación surge al evidenciar en los estudiantes de la Institución
Educativa N° 11229 de Mórrope, escasa cultura ecológica, manifestándose en
conductas como: arrojo constante de residuos sólidos en el piso, uso inadecuado
de los servicios higiénicos, escasa cultura para el cuidado del agua, entre otros,
motivos que conllevaron a la ejecución del presente estudio cuyo objetivo general
fue proponer un programa de educación ambiental para fortalecer la conciencia
ecológica en estudiantes del quinto ciclo de la Institución Educativa N° 11229
Mórrope.
La presente investigación se desarrolló bajo el enfoque cuantitativo, con tipo de
estudio descriptivo propositivo, dirigido a una población de 22 estudiantes, a
quienes se les aplicó el cuestionario diagnóstico, cuyos datos sirvieron para la
elaboración de la propuesta, llegando a concluir que los estudiantes del quinto ciclo
de la Institución Educativa N° 11229 Mórrope presentan escasa conciencia
ecológica, lo que permitió diseñar la propuesta del programa de educación
ambiental, fundamentado en la teoría de la persuasión de McGuire y la teoría de la
inteligencia naturalista de Horward Gardner y posteriormente validado mediante
juicio de expertos, quienes con su conocimiento y experiencia revisaron
minuciosamente la propuesta, hicieron los reajustes necesarios y procedieron a
firmar su aprobación
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
UJI AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL TEMU KUNCI (Boesenbergia pandurata) TERHADAP Escherichia coli ATCC 11229 DAN Staphylococcus epidermidis FNCC 0048 SECARA IN VITRO
Get PDFPenelitian ini bertujuan untuk mengetahui aktivitas antibakteri ekstrak etanol temu kunci terhadappertumbuhan bakteri Escherichia coli ATCC 11229 dan Staphylococcus epidermidis FNCC 0048 serta mengetahuikonsentrasi optimum yang menghambat pertumbuhan kedua bakteri uji. Jenis penelitian ini adalah eksperimen.Penelitian dilaksanakan bulan Mei – Juli 2017 di Laboratorium Mikrobiologi FMIPA UNY. Variabel bebaspenelitian adalah variasi konsentrasi ekstrak etanol temu kunci yaitu 0,5 ppm; 5 ppm; 50 ppm; 250 ppm; dan 500ppm. Parameter yang diukur adalah nilai zona hambat. Uji menggunakan metode Kirby Bauer dengan ulangan 3kali. Pengamatan dilakukan 6 jam sekali selama 24 jam waktu inkubasi. Data dianalisis menggunakan two wayANOVA dilanjutkan dengan uji Duncan. Hasil menunjukkan diameter zona hambat ekstrak etanol temu kunci padaseluruh variasi konsentrasi berkisar 8-10 mm untuk bakteri Escherichia coli ATCC 11229 dan Staphylococcusepidermidis FNCC 0048. Hasil analisis menunjukkan konsentasi optimum untuk menghambat pertumbuhan keduabakteri adalah 500 ppm dan 250 ppm.Kata kunci: antibakteri, ekstrak etanol temu kunci, Escherichia coli ATCC 11229, Staphylococcus epidermidisFNCC 004
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
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