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Identifikasi Pencemaran Logam Berat Tanah Permukaan di Sekitar PLTU Teluk Sirih dengan Metode Susceptibilitas Magnetik
Full text linkPenelitian untuk menentukan tingkat pencemaran logam berat pada tanah permukaan di sekitar PLTU Teluk Sirih dengan metode suseptibilitas magnetik telah dilakukan. Pengambilan sampel tanah dilakukan pada 28 titik pada kedalaman 30 cm. Pengukuran kandungan logam berat menggunakan X-Ray Fluorescence (XRF) dilakukan pada 4 sampel. Hasil penelitian menunjukkan bahwa nilai suseptibilitas magnetik berkisar antara 81,4 × 10-8 m3/kg sampai 934,2 × 10-8 m3/kg. Semakin jauh dari PLTU, nilai suseptibilitas magnetik semakin rendah yang mengindikasikan bahwa pencemaran berasal dari emisi hasil pembakaran batu bara di PLTU. Nilai suseptibilitas magnetik menunjukkan bahwa tanah di sekitar PLTU termasuk tercemar tinggi, sedang, dan beberapa titik tercemar rendah. Semakin jauh dari ruas jalan, nilai suseptibilitas magnetik semakin rendah yang menunjukkan bahwa adanya sumber pencemar lainnya yang berasal dari emisi kendaraan pengangkut batu bara yang didukung oleh ditemukannya unsur Pb. Adanya pengaruh vegetasi terhadap tingkat pencemaran tanah yang ditunjukkan dari nilai suseptibilitas magnetik pada zona bervegetasi lebih rendah daripada nilai suseptibilitas magnetik pada zona tidak bervegetasi
IDENTIFIKASI PENCEMARAN LOGAM BERAT TANAH PERMUKAAN DI SEKITAR PLTU TELUK SIRIH DENGAN METODE SUSEPTIBILITAS MAGNETIK
Full text linkMagnetic susceptibility analysis of surface soil around Teluk Sirih Power Plant in Padang city has been conducted. Soil sampling was conducted at 28 points at a depth of 30 cm. The results show that the magnetic susceptibility value of surface soil range from 81.4667×10-8 m3/kg to 934.2133×10-8 m3/kg. The magnetic susceptibility value indicates that the surface soil around the PLTU is moderately to highly polluted, with several points of low pollution. The further from the PLTU, the lower the magnetic susceptibility value, indicating that the pollution comes from emissions from coal combustion at the PLTU. The further from the road, the lower the magnetic susceptibility value, indicating that there are other sources of pollution from vehicle emissions passing through the road. It also found that vegetation affects the level of soil pollution as indicated by the magnetic susceptibility value in the vegetated zone being lower than the magnetic susceptibility value in the non-vegetated zone.Penelitian untuk menentukan tingkat pencemaran logam berat pada tanah permukaan di sekitar PLTU Teluk Sirih dengan metode suseptibilitas magnetik telah dilakukan. Pengambilan sampel tanah dilakukan pada 28 titik pada kedalaman 30 cm. Pengukuran kandungan logam berat menggunakan X-Ray Fluorescence (XRF) dilakukan pada 4 sampel. Hasil penelitian menunjukkan bahwa nilai suseptibilitas magnetik berkisar antara 81,4 × 10-8 m3/kg sampai 934,2 × 10-8 m3/kg. Semakin jauh dari PLTU, nilai suseptibilitas magnetik semakin rendah yang mengindikasikan bahwa pencemaran berasal dari emisi hasil pembakaran batu bara di PLTU. Nilai suseptibilitas magnetik menunjukkan bahwa tanah di sekitar PLTU termasuk tercemar tinggi, sedang, dan beberapa titik tercemar rendah. Semakin jauh dari ruas jalan, nilai suseptibilitas magnetik semakin rendah yang menunjukkan bahwa adanya sumber pencemar lainnya yang berasal dari emisi kendaraan pengangkut batu bara yang didukung oleh ditemukannya unsur Pb. Adanya pengaruh vegetasi terhadap tingkat pencemaran tanah yang ditunjukkan dari nilai suseptibilitas magnetik pada zona bervegetasi lebih rendah daripada nilai suseptibilitas magnetik pada zona tidak bervegetasi
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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