1,720,956 research outputs found
PENGARUH MEDIA PhET SIMULATIONS TERHADAP PEMAHAMAN KONSEP MODEL MOLEKULSISWA SMA NEGERI 1 MAWASANGKA
Get PDFPenelitian ini bertujuan untuk meningkatkan pemahaman konsep pada topik model molekul dengan menggunakan media PhET Simulation. Jenis penelitian ini adalah quasi eksperimen. Metode penelitian yang digunakan adalah pretest and posttest control group desain.Teknik pengambilan sampel menggunakan purposive random sampling. Penelitian ini melibatkan dua kelasyaitukelas eksperimen dan kelas kontrol. Teknik pengambilan data menggunakan tes pemahaman konsep model molekul. Uji hipotesis ini menggunakan uji t sampel independen (Independent Sample t Test) dengan menggunakan asumsi bahwa data berdistribusi normal dan homogen. Hasil analisis menunjukan bahwa ada pengaruh penggunaan media PhET Simulationterhadap pemahaman konsep model molekulsiswa di SMA Negeri 1 Mawasangka, yaitu dibuktikan dengan taraf signifikasi 0.025 < 0.05 sehingga Ho ditolak.Kata Kunci: Media Pembelajaran, Smulasi Interaktive PhET, Pemahaman Konsep, Model Molekul
DETEKSI MOLEKULER BAKTERI Escherichia coli SEBAGAI PENYEBAB PENYAKIT DIARE DENGAN MENGGUNAKAN TEHNIK PCR
Get PDFPenelitian ini dilakukan untuk mendeteksi secara molekuler bakteri Escherichia coli sebagai penyebab penyakit diare dengan menggunakan tehnik PCR. DNA genomik Escherichia coli diekstraksi menggunakan metode boiling, kemudian diamplifikasi menggunakan primer 16E1 dan 16E2. Hasil PCR positif Escherichia coli ditunjukkan dengan adanya pita fragmen DNA pada ukuran sekitar 584 pasang basa pada gel elektroforesis. Dalam penelitian ini sampel yang digunakan adalah sebanyak delapan titik dengan distribusi empat titik dari sampel air sumur bor dan empat dari air sumur galian. Dari delapan titik sampel, ada satu sampel yang terdeteksi secara molekuler yaitu mengandung Escherichia coli yaitu dengan kode sampel ASB 3yang dibuktikan dengan adanya pita DNA. Hasil penelitian menunjukkan bahwa metode PCR dapat mendeteksi Escherichia coli secara spesifik dan lebih cepat.
Kata Kunci : Air, Bakteri Escherichia coli, Isolasi DNA, Tehnik PCR
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
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
The Effectiveness of The Use of Diorama Teaching Aids on Students Interest and Learning
Get PDFTeaching aids are considered an important tool because they are used by educators in the delivery of education. The problem of facilities and infrastructure is considered an important issue in education, therefore it is necessary to update the existing facilities and infrastructure starting from updating school buildings to learning facilities. This research to determine the effectiveness of using teaching aids on the interest and learning outcomes of science in class VII students at Junior high school 9 Kendari. The type of research used is Quasi-Experimental Design research in the form of Non-Equivalent Control Class Design. Data collection methods are carried out through questionnaires and tests The population of this study was all seventh grade students of Junior high school 9 Kendari which amounted to 11 study class, with the research sample being class VII 10 which amounted to 27 students as the control class and class VII 8 which amounted to 30 students as the experimental class. Data analysis techniques used are descriptive and inferential data analysis techniques. From the research conducted related to the effectiveness of the use of diorama teaching aids obtained research results that in learning, there are differences in interest and learning outcomes between the control class that does not use teaching aids with experimental classes that use teaching aids. In addition, based on the N-gain test, the use of diorama teaching aids proved to be effective with the category of medium effectiveness level. Keywords: Effectiveness, Teaching Aids, Interest in Learning, Learning Outcomes, N-Gai
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