1,720,969 research outputs found
Penyusunan Model Pendugaan Pola Produktivitas Bulanan Kelapa Sawit Berdasarkan Jeluk Dan hari Hujan
No full textUntuk produktivitas optimal, kelapa sawit memerlukan curah hujan yang terdistribusi merata sepanjang tahun. Penelitian ini bertujuan untuk menduga pola produktivitas bulanan kelapa sawit berdasarkan data jeluk dan hari hujan bulanan. Penelitian dilakukan di Sumatra Utara, yaitu pada kelapa sawit tahun umur 12 tahun di 15 kebun kelapa sawit di lahan mineral. Data yang digunakan adalah data jeluk hujan (CH) dan hari hujan (HH) bulanan antara tahun 2012-2016, data produktivitas bulanan tahun 2016 sebagai basis data, serta data produktivitas bulanan tahun 2017 sebagai data pembanding. Data dianalisis menggunakan analisis korelasi linear dan non-linear antara jeluk hujan dengan produktivitas serta hari hujan dengan produktivitas pada lag (jeda waktu) 0, 6, 12, 18, 24, 30, 36, 42, dan 48 bulan. Hasil analisis korelasi digunakan untuk membangun model pendugaan pola produktivitas bulanan. Nilai Root Mean Square Error(RMSE), Mean Absolute Bias Error (MABE), dan Mean Absolute Percentage Error (MAPE) antara hasil pendugaan dengan capaian aktual produktivitas bulanan tahun 2017 menunjukkan bahwa model pendugaan menggunakan data hari hujan lebih akurat dibandingkan jika menggunakan data jeluk hujan. Nilai rata-rata RMSE; MABE; dan MAPE model pendugaan berdasarkan hari hujan adalah 0,337; 0,275; dan 15,482%; sementara jika menggunakan data jeluk hujan nilainya berturut-turut sebesar 0,367; 0,296; dan 16,594%
Distribusi perakaran kelapa sawit dan sifat fisik tanah pada ukuran lubang tanam dan aplikasi tandan kosong sawit yang berbeda
No full textPenelitian ini dilakukan untuk mengetahui distribusi perakaran dan faktor fisik tanah pada ukuran lubang tanam standar (0.6 m x 0.6 m x 0.6 m), sedang (1 m x 1 m x 0.6 m) dengan aplikasi tandan kosong sawit (TKS) sebanyak 400 kg/lubang tanam dan 740 g urea/lubang tanam. Penelitian ini merupakan penelitian demonstrasi plot menggunakan desain penelitian rancangan acak kelompok (RAK) non faktorial dengan tiga perlakuan ukuran libang tanam yaitu lubang tanam standar, sedang dan besar dengan tiga kali ulangan
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
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
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