1,720,959 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
Pengaruh Model Pembelajaran Guided Discovery Learning Terhadap Literasi Kimia Peserta Didik Pada Materi Larutan Penyangga
Full text linkThe purpose of this research was to know the effect of guided discovery learning models on students' chemical literacy in the buffer solution material. This research was conducted at SMAN 53 Jakarta in the even semester of the 2018/2019 academic year. The research method was quasi experiment. The sample in this study was selected through purposive random sampling. The study sample consist of two classes, XI MIPA 4 as the control class and Class XI MIPA 3 as the experimental class. The control class gets learning with discussion methods and the experimental class gets learning with guided discovery learning models. Based on the results of data analysis, the value of tcount is 5.568 and the value of ttable is 2.001 with df = 59 and the significance level is α = 0.05. The results of this study indicate that the tcount is greater than ttable (5.568> 2.001), it can be concluded that there is a positive influence on the application of guided discovery learning learning models to students' chemical literacy in the buffer solution material.
Keywords
Guided Discovery Learning Model, Chemical Literacy, Buffer SolutionPenelitian ini bertujuan untuk memperoleh informasi pengaruh model pembelajaran guided discovery learning terhadap literasi kimia peserta didik pada materi larutan penyangga. Penelitian ini dilakukan di SMAN 53 Jakarta pada semester genap tahun ajaran 2018/2019. Metode penelitian yang digunakan yaitu quasi experiment. Sampel pada penelitian ini dipilih melalui teknik sampling purposive random sampling dan didapatkan kelas XI MIPA 4 sebagai kelas kontrol dan Kelas XI MIPA 3 sebagai kelas eksperimen. Kelas kontrol mendapat pembelajaran dengan metode diskusi dan kelas eksperimen mendapat pembelajaran dengan model pembelajaran guided discovery learning. Berdasarkan hasil analisis data, nilai thitung sebesar 5,568 dan nilai ttabel sebesar 2,001 dengan df= 59 dan taraf signifikansi = 0,05. Hasil penelitian tersebut menunjukkan bahwa nilai thitung lebih besar dari ttabel (5,568 > 2,001), maka dapat disimpulkan bahwa terdapat pengaruh positif pada penerapan model pembelajaran guided discovery learning terhadap literasi kimia peserta didik pada materi larutan penyangga.
Kata kunci
Model Pembelajaran Guided Discovery Learning, Literasi Kimia, Larutan Penyangg
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
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe TAI (Team Assisted Individualization) Terhadap Hasil Belajar Siswa Kelas X MIA pada Pokok Bahasan Larutan Elektrolit dan Non Elektrolit
Full text linkThis research is aiming to discover effect of the application of Team Assisted Individualization type of cooperative learning model towards learning outcomes students of class X MIA in the subject of electrolyte and non-electrolyte solutions. The design research used in this research is posttest-only nonequivalent control group. This research is performed in Class X MIA, 27 Senior High School Jakarta in academic year of 2018/2019. Sampling technique used in this research is purposive sampling, thus Class X MIA 1 defined as experiment class and Class X MIA 2 defined as control class. The learning model used in experiment class is Team Assisted Individualization learning model, while in the control class is using Active Learning. The results show that there’s a difference in student learning outcomes in experimental class and control class (tcount = 1,995; ttable = 1,668, tcount > ttable). It can be concluded that learning activities using Team Assisted Individualization learning models have a positive influence on student learning outcomes on the subject of electrolyte and non-electrolyte solutions.
Keywords:Team Assisted Individualization Learning Model, StudentLearning Outcomes, Electrolyte andNon-electrolyte SolutionsPenelitian ini bertujuan untuk mengetahui pengaruh penerapan model pembelajaran kooperatif tipe Team Assisted Individualization terhadap hasil belajar siswa kelas X MIA pada pokok bahasan larutan elektrolit dan non elektrolit. Desain penelitian yang digunakan adalah posttest-only nonequivalent control group. Penelitian ini dilakukan di kelas X MIA, SMA Negeri 27 Jakarta pada tahun ajaran 2018/2019. Pengambilan sampel dalam penelitian ini menggunakan teknik purposive sampling, sehingga diperoleh kelas X MIA 1 sebagai kelas eksperimen dan kelas X MIA 2 sebagai kelas kontrol. Model pembelajaran yang digunakan pada kelas eksperimen adalah model pembelajaran Team Assisted Individualization, sedangkan pada kelas kontrol adalah Pembelajaran Aktif. Hasil penelitian menunjukkan adanya perbedaan hasil belajar siswa di kelas eksperimen dan kelas kontrol (thitung = 1,995; ttabel = 1,668, thitung > ttabel). Sehingga dapat disimpulkan bahwa kegiatan pembelajaran dengan menggunakan model pembelajaran Team Assisted Individualization memberikan pengaruh positif terhadap hasil belajar siswa pada pokok bahasan larutan elektrolit dan non elektrolit.
Kata kunci: Model Pembelajaran Team Assisted Individualization, Hasil Belajar Siswa, Larutan Elektrolit dan Non Elektroli
Pengaruh Penambahan Biokar Sekam Padi Terhadap Penyerapan Gas CO2 (Carbon Dioxide) Dan Kuat Tekan Pada Plester Dinding
No full textAbstrak
Pada penelitian ini dilakukan pengolahan limbah sekam padi menjadi biokar sebagai zat aditif dalam mortar yang berperan sebagai absorben gas CO2 di dalam mortar. Tujuan penelitian ini selain untuk memanfaatkan limbah sekam, tetapi juga untuk mengetahui pengaruh penambahan biokar sekam padi terhadap penyerapan gas CO2 dan kuat tekan pada plester dinding. Pada penelitian ini biokar yang digunakan adalah biokar yang dipirolisis pada suhu 500ºC selama 8 jam. Penambahan biokar dilakukan dengan presentase 0; 10; 12,5 dan 15% dalam campuran mortar dengan komposisi Portland Cement (PC):Pasir (PS) sebesar 1:4 dan faktor air semen sebesar 0,6. Selanjutnya dilakukan pengujian kuat tekan mortar dilakukan setelah perawatan 7 dan 28 hari dan serapan gas CO2. Hasil dari pengukuran kuat tekan dan serpan gas CO2 menunjukan bahwa semakin banyak penambahan presentase biokar dalam campuran mortar akan menurukan kekuatan plester dinding dan penyerapan gas CO2 pada plester.
Kata kunci: Biokar, karbon dioksida, kuat tekan, mortar.
Abstract
Biochar utilization in various fields of life, where biocar is an additive in mortar that acts as CO2 absorbent in the mortar. This study aims to determine the effect of the addition of biochar rice husk form CO2 absorption and compressive strength on wall plaster. The biochar used was characterized by SEM-EDX and FTIR, while the standard plaster samples, 10% biocar+plaster, and 15% biocar+plaster used SAA. In this study biocar which had been pyrolyzed at 500 °C at a pressure of 10 psi, then added at 0; 10; 12.5 and 15% in mortar mix with the composition of Portland Cement (PC):Sand (PS) was 1:4 and Portland Cement (PC): water (W) of 0.6. Mortar compressive strength testing on 7 and 28 treatment days. From the results of the study, the optimal percentage of biocar addition was 10% with compressive strength of 18.5 MPa and CO2 absorption of 0.14 ppm. More biochar additions to the plaster reduce the strength and absorption of CO2 gasplaster.
Keywords: Biochar, carbon dioxide, compressive strength, morta
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