1,720,978 research outputs found
IDENTIFIKASI SAMPEL CORING ASPAL DENGAN METODE PEMBORAN DI PIT WINTO PADA WILAYAH TAMBANG PT. WIKA BITUMEN IUP KABUNGKA
No full textThis research was conductied in the mining area of PT. Wika Bitumen Pit Winto Banabungi Village, Pasarwajo Buton, Southeast Sulawesi Province which aims to determine the asphalt exploration process in the PT. Wika Bitumen Pit Winto mining area, to determine the stages in drilling and to determine the physical characteristics of asphalt samples obtained from drilling results. The research method consisted of the initial survey, mapping outcrops, and drilling results. The results showed that at the KF-21-039 point, most asphalt was found at a depth of 1.00 m – 7.80 m with a dark black asphalt color accompanied by a pungent odor that was not sticky. Meanwhile, at a depth of 7.80 m – 23.60 m, siltstone was found with a bluish-gray color, odorless, and not sticky. At a depth of 23.60 m – 25.20 m, another type of asphalt was found with black color, black spout, massive, pungent smell, and not sticky. From a depth of 25.20 m – 39.80 m, no asphalt was found, but siltstone.Penelitian ini dilakukan di wilayah tambang PT. Wika Bitumen Pit Winto desa Banabungi, Pasarwajo Buton, provinsi Sulawesi Tenggara yang bertujuan untuk mengetahui proses eksplorasi aspal pada wilayah tambang PT Wika Bitumen Pit Winto, dan karakteristik fisik sampel aspal yang diperoleh dari hasil pengeboran. Metode penelitiannya dilakukan terdiri dari tahapan survey awal, pemetaan singkapan, dan pengeboran. Hasil penelitiannya diperoleh bahwa di titik KF-21-039 kebanyakan aspal ditemukan pada kedalaman 1,00 m – 7,80 m dengan warna aspal yang hitam pekat disertai bau menyengat yang tidak lengket. Sedangkan pada kedalaman 7,80 m – 23,60 m ditemukan jenis batuan siltstone (batu lanau) dengan warna abu-abu kebiruan, tidak berbau, dan tidak lengket. Pada kedalaman 23,60 m – 25,20 m ditemukan lagi jenis aspal dengan warna hitam, cerat hitam, masif, bau menyengat, dan tidak lengket. Dari kedalaman 25,20 m – 39,80 m tidak lagi ditemukan adanya aspal melainkan batu lanau
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
Analysis of Water Quality in the Winto River, Buton, Southeast Sulawesi
No full textThis study assessed the water quality of the Winto River in Buton Regency, Southeast Sulawesi, at upstream and downstream points adjacent to asphalt mining activities. Sampling was carried out in accordance with SNI 8995:2021, and the results were evaluated by comparing the physical, chemical, heavy metal, and biological parameters against river water quality standards for classes 1 to 4 as stipulated in Government Regulation No. 22 of 2021. Findings revealed that physical, chemical, and biological parameters generally remained within safe limits. The measurement results show that the water temperature is maintained at a constant 28 °C and is still within the permissible deviation. TDS and TSS values were low, pH was neutral, and both BOD and COD indicated minimal organic loads. Nutrients and heavy metals were well below permissible thresholds, while total coliform counts complied with Class 1 standards. These results suggest that the Winto River has not yet experienced significant water quality degradation despite its proximity to asphalt mining. The novelty of this research lies in providing empirical evidence from a rarely studied context in Indonesia, serving as an essential baseline for long-term monitoring. Practically, the findings highlight the need for continuous monitoring and for evidence-based policies by local authorities to ensure sustainable water resource management in mining-affected region
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
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
Menguji Kadar Aspal Buton (Asbuton) dengan Ekstraksi Menggunakan Metode Sokhlet di PT. Wika Bitum Sulawesi Tenggara.
No full textHasil penelitian yang telah diperoleh dari ekstraksi kadar air adalah dari pengujian I sampel dari Winto sebesar 3 %, Lawele 3,4 %, Tambang C 6,9 %
dan Kabungka 9,6 % sedangkan pada pengujian II sampel dari Winto sebesar 3 %,
Lawele 2 %, Tambang C 7,7 % dan Kabungka 2,1 %, dengan kadar aspal Buton
yang diperoleh pada pengujian I sampel dari Winto sebesar 23,39 %, Lawele 24,79
%, Tambang C 24,41 % dan dari Kabungka 22,79 % sedangkan pada pengujian II
dari Winto sebesar 21,54 %, Lawele 33,32 %, Tambang C 25,03 % dan Kabungka
24,69 %. Penurunan massa tiap sampel pada pengujian I sampel dari Winto sebesar
0,25 %, Lawele 0,27 %, Tambang C 0,29 % dan Kabungka sebesar 0,3 % sedangkan
pada pengujian II dari Winto sebesar 0,23 %, Lawele sebesar 0,34 %, Tambang C
sebesar 0,3 % dan Kabungka sebesar 0,26 %
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
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