1,720,997 research outputs found
Standarisasi Ozon Di Khatulistiwa Sebagai Model Distribusi Ozon Wilayah Tropis Indonesia
No full textHlm. 82-9
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
Analisis Interferensi Frekuensi Radio Untuk Optimalisasi Konfigurasi Frekuensi Spektrometer Callisto
No full textSpektrometer Callisto (Compound Astronomical Low-frequency, Low-cost Instrument for Spectroscopy in Transportable Observatories) dirancang untuk bekerja pada rentang frekuensi yang lebar antara 45-870 MHz, dibagi dalam sejumlah kanal yang diinginkan setiap detiknya dengan menetapkan konfigurasi frekuensi (frequency configuration). Dalam kenyataannya, penetapan konfigurasi frekuensi ini sangat tergantung pada kondisi kepadatatan penggunaan frekuensi radio di lokasi pengamatan, yang dapat diketahui dari pengukuran interferensi frekuensi radio atau Radio Frequency Interference (RFI). Oleh karena itu, perlu dilakukan analisis pengukuran RFI di lokasi pengamatan untuk memperoleh konfigurasi frekuensi Callisto yang optimal dan untuk meningkatkan kualitas penerimaan Callisto sehingga pengamatan emisi radio matahari dapat dilakukan dengan lebih baik. Metoda yang dilakukan adalah melakukan pengukuran penggunaan spektrum frekuensi radio secara teratur pada perioda tahun 2015, mengolah data hasil pengukuran RFI secara statistik, mengidentifikasi interferensi (transmisi) radio yang dominan untuk suatu periode waktu tertentu. Selanjutnya dengan mengeliminir frekuensi radio yang mengalami interferensi kuat pada rentang frekuensi kerja Callisto, dapat ditetapkan konfigurasi frekuensi yang paling optimal pada pengamatan Callisto. Selain itu, interferensi pada pita frekuensi yang sudah dialokasikan untuk penelitian antariksa dan astronomi pada rentang frekuensi tersebut dapat dilaporkan ke otoritas pengelola frekuensi..Hal.26-33 : ilus
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
The use of satellite beacon TEC data from GRBR campaign-based observations for ionosphere tomography over West Java Indonesia
Get PDFThe experiment of ionospheric tomographic reconstruction using satellite beacon TEC data from two or more adjacent GRBR observation stations following equatorial latitude and longitude have been conducted on campaign-based observation in Sumedang, Pameungpeuk and Indramayu West Java on 2016 and 2017. The reconstruction technique utilized is a simple algebraic reconstruction technique (ART). The result obtained is the ionosphere electron density distribution along the longitude of 108 degrees East over the area of West Java and Indonesia. The ionosphere electron density parameters obtained from the IRI-2012 Model were used as the initiation to construct ionospheric tomographic reconstruction. The validation performed by correlating foF2 from the ionospheric tomographic reconstruction with foF2 obtained from ionosonde observation at Sumedang station, one of the GRBR observation sites shows that corresponded to the correlation coefficient value of 0.8665, with a bias frequency of 1.386 MHz, whereas the correlation with the maximum electron density value obtained from the IRI-2016 model gives a correlation coefficient value of 0.8958. a bias frequency of 1.386 MHz, whereas the correlation with the maximum electron density value obtained from the IRI-2016 model gives a correlation coefficient value of 0.8958.Hlm.85-9
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