1,720,958 research outputs found
Keragaan Karakter Agronomi dan Parameter Genetik Aksesi Ubi Jalar serta Toleransinya terhadap Hama Boleng
Full text linkPlasma nutfah merupakan sumber gen yang digunakan dalam perakitan varietas. Informasi dari aksesi plasma nutfah mengenai keragaan, keragaman, daya pewarisan, dan kemajuan genetik harapan, serta toleransinya terhadap serangan hama dan penyakit perlu tersedia untuk merakit varietas baru. Tujuan penelitian adalah untuk mendapatkan informasi keragaan karakter agronomi dan paramater genetik aksesi ubi jalar (Ipomoea batatas L.) serta toleransinya terhadap hama boleng (Cylas formicarius). Penelitian dilaksanakan di Kebun Percobaan Muneng pada Mei–September 2014. Penelitian menggunakan rancangan acak kelompok dengan tiga ulangan. Bahan yang digunakan adalah 75 aksesi ubi jalar koleksi Balai Penelitian Tanaman Aneka Kacang dan Umbi (Balitkabi) dari berbagai daerah di Indonesia. Hasil analisis ragam menunjukkan perbedaan genotipe yang sangat nyata pada semua karakter yang diamati. Aksesi MLGI 0247 menunjukkan bobot umbi per plot tertinggi, sedangkan aksesi MLGI 0175 menunjukkan nilai terendah. Tujuh puluh lima aksesi yang diuji menunjukkan perbedaan ketahanan terhadap hama boleng yaitu satu aksesi ketahanan tinggi (HR), 19 aksesi ketahanan menengah (MR), 41 aksesi ketahanan rendah (LR), tujuh aksesi rentan (S), dan tujuh aksesi ekstrim rentan (ES). Empat aksesi (MLGI 0257, MLGI 0035, MLGI 0226, MLGI 0281) menunjukkan potensi hasil cukup tinggi dengan ketahanan terhadap hama boleng dengan kategori LR. Karakter diameter sulur, bobot tajuk, bobot umbi/plot, kadar bahan kering umbi, dan intensitas kerusakan umbi memiliki keragaman genetik yang luas, sedangkan panjang sulur, luas daun, indeks panen, jumlah umbi/plot, dan persen umbi boleng memiliki keragaman genetik yang sempit. Indeks panen dan bobot umbi/plot memiliki nilai keragaman genetik luas, heritabilitas, dan kemajuan genetik harapan yang tinggi, sehingga karakter tersebut berguna sebagai kriteria seleksi dan berpotensi memberikan respon positif dalam perbaikan hasil ubi jalar
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
Evaluation of orange-fleshed sweetpotato genotypes for yield and yield contributing parameters in two environments
No full textRahajeng W, Rahayuningsih SA. 2017. Evaluation for yield and yield contributing parameters of orange-fleshed sweetpotato genotypes in two environments. Nusantara Bioscience 9: 275-281. Orange-fleshed sweetpotatoe (OFSP) is one of the most important sources of betacaroten and carbohydrates. OFSP showed varying responses to different environments, depending on the adaptability of the genotypes. The objective of this study was to evaluate the correlation between yield and yield component of OFSP genotypes at two different agroclimatological environments (Mojokerto and Blitar) from May to September 2013. Twenty four OFSP genotypes (twenty two clones and two varieties as the check) were used in this study and arranged in a randomized complete block design with three replications. Results showed that responses of OFSP genotypes to the environments varied and genotypes had highly significantly affected all parameters. Based on the criteria of high yield, amylum content, and dry matter production four clones were selected (MSU 09008-54, MSU 07009-113, MSU 07025-45, and MSU 09025-71) from Blitar and two clones (MSU 07009-113 and MSU 070-64) from Mojokerto. Clone MSU 07009-113 showed good performance in both environments for yield, amylum content, and dry matter production parameters. The result of the correlation analysis reveals that root yield is highly significant and positively correlated with dry matter production, number of roots, diameter of root, and harvest index in two locations (Blitar and Mojokerto). Based on the correlation and path analysis, dry matter production, root diameter, and harvest index can be used as an effective indicators selection for high yield OFSP genotypes.</jats:p
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