1,721,056 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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 TINGKAT DAN FREKUENSI PEMBERIAN PAKAN TERHADAP KINERJA PERTUMBUHAN DAN PEMANFAATAN PAKAN PADA PEMELIHARAAN BENIH IKAN GURAMI (Osphronemus gouramy)
No full textPakan komersial menyumbang hingga 85% dari biaya produksi dalam pembenihan ikan gurami, dengan kenaikan harga yang berdampak pada efisiensi produksi. Optimalisasi feeding rate (FR) dan feeding frequency (FF) sangat penting dalam pengelolaan pakan. Penelitian ini menganalisis pengaruh kombinasi FR dan FF terhadap kinerja pertumbuhan dan pemanfaatan pakan pada benih ikan gurami. Rancangan acak lengkap faktorial digunakan dengan dua tingkat FR (3% dan 6%) serta tiga tingkat FF (1, 2, dan 3 kali per hari), menghasilkan enam kombinasi perlakuan dengan tiga ulangan. Ikan gurami (0,81 ± 0,02 g; 3,79 ± 0,17 cm) dipelihara selama 60 hari dalam unit dengan volume 20 L dengan kepadatan 1 ekor L⁻¹ dan pergantian air yang seragam. Hasil penelitian menunjukkan bahwa kombinasi FR 6% dengan FF tiga kali per hari menghasilkan kinerja pertumbuhan terbaik, dengan bobot akhir (5,74 g), laju pertumbuhan spesifik (3,25% hari⁻¹), pertambahan bobot harian (82,17 mg hari⁻¹), koefisien pertumbuhan termal (4,74), dan faktor kondisi (1,91). Kombinasi FR 6% dengan FF dua kali per hari menghasilkan panjang akhir (6,96 cm), biomassa akhir (113,75 g), hasil bersih (4,87 g L⁻¹), total konsumsi pakan (120,07 g), dan tingkat kelangsungan hidup (100%) tertinggi. Rasio konversi pakan terbaik (0,83) dan efisiensi pakan tertinggi (82,46%) ditemukan pada FR 3% dengan FF tiga kali per hari, meskipun tidak meningkatkan pertumbuhan. Secara keseluruhan, FR 6% dengan FF tiga kali per hari merupakan kombinasi paling efektif untuk mengoptimalkan pertumbuhan dan pemanfaatan pakan (rasio konversi pakan 1,05; efisiensi pakan 81,87%) dan direkomendasikan dalam manajemen pembenihan ikan gurami.Commercial feed accounts for up to 85% of production costs in giant gourami hatcheries, with rising prices impacting production efficiency. Optimizing feeding rate (FR) and feeding frequency (FF) is crucial for managing feed use. This study analyzed effects of different FR and FF combinations on growth performance and feed utilization in giant gourami fry. A factorial completely randomized design was used with two FR (3% and 6%) and three FF levels (1, 2, and 3 times per day), totaling six treatment combinations with three replicates. Giant gourami (0.81 ± 0.02 g, 3.79 ± 0.17 cm) were reared for 60 days in 20 L units at a density of 1 fish L-1, with uniform water exchange. Results showed that FR 6% with FF three times per day yielded the best growth performance, with final weight (5.74 g), specific growth rate (3.25% day-1), daily weight gain (82.17 mg day-1), thermal growth coefficient (4.74), and condition factor (1.91). The FR 6% with FF twice per day combination resulted in the highest final length (6.96 cm), biomass (113.75 g), net yield (4.87 g L-1), total feed consumption (120.07 g), and survival rate (100%). The best feed conversion ratio (0.83) and feed efficiency (82.46%) were observed in FR 3% with FF three times per day, though it did not enhance growth. Overall, FR 6% with FF three times per day was the most effective for optimizing growth and feed utilization (feed conversion ratio 1.05; feed efficiency 81.87%) and is recommended for giant gourami hatchery management
Integral-derivative (I-D) and modulation-index-curve prediction control techniques for three-phase AC-DC buck-type converter with simplified voltage-based SPWM /Azrita Alias
No full textThis thesis presents the design of a three-phase AC-DC buck-type converter with bidirectional capability using simplified voltage-based sinusoidal pulse-width-modulation (SPWM) switching technique. With its four diodes connected to the switch enable bidirectional power flow in each switch. The proposed topology is an extension of the conventional 6-switch three-phase AC-DC buck-type converter whereas the proposed switching technique is a simplification of conventional modified SPWM technique. It uses one reference signals (0-60° sine wave) and one type carrier signal, instead of two reference signals and two types of carrier signals to generate PWM signals. The proposed circuit configuration produces sinusoidal AC current with low THD at near unity power factor using simplified voltage-based SPWM. Voltage feedback control allows high dynamic performance of the DC output voltage in the step-changing of reference and disturbance. Two digital feedback voltage controls, Integral-Derivative (I-D) and modulation-index-curve prediction techniques, are suggested to equalize the output voltage to the reference voltage with high dynamic performance and simpler implementation. The algorithm of the modulation-index-curve prediction technique is obtained through I-D control model by determining closed-loop dominant poles. By assuming zero system loss, a small steady-state error is still present (absent in the I-D controller). Modulation-index-curve-prediction technique is still advantageous because it reduces dependence on feedback-sensor reading and simplifies the I-D algorithms. The converter’s validity, PWM switching strategy, and feedback control strategy have been verified by simulation using MATLAB/Simulink. The hardware prototype has been implemented in a TMS320F28335 Digital Signal Processor (DSP) and the results are validated
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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