1,720,955 research outputs found
TOP SOIL USAGE EFFICIENCY UP TO 73% WITH THE IMPLEMENTATION OF GROOVE SYSTEM AT LIMESTONE MINE RECLAMATION AREA PT SEMEN INDONESIA (PERSERO) TBK
No full textBased on Law Number 3/2020, Good Mining Practice’s criteria are mining safety provisions, environmental management, and monitoring, including reclamation and post-mining activity, conservation of minerals and coal, and management of mine waste before being released into the environment. Directorate General of Mineral and Coal state's Strategic plan reclamation target for 2021 is 7.025 hectares and 7.050 hectares in 2022. PT Semen Indonesia, as one of the mining companies, is committed to supporting the reclamation target as stated in their Yearly Land Reclamation Plan. Mine floor reclamation on limestone quarry was generally performed using top soil spreading which cost up to 3,000 m3 of top soil per hectare area. Whereas top soil availability on site is limited. As a result, the existing top soil reserve could not fulfill the needs of reclamation to cover entire mining floor. The practice of Spreading Method depletes reserved top soil, causes excessive planting media preparation and revegetation cost. This challenging condition encourages PT. Semen Indonesia to innovate to suppress reclamation cost without reducing the success rate. The company concluded that Groove Planting System could reduce both top soil transport cost and revegetation cost, even increase the survival rate of the trees. This method reduced up to 2,200 m3 of top soil usage per hectare area, reduced top soil hauling cost, reduced tree planting and treatment, even increased the success rate of reclamation. With this innovation, company could suppress reclamation cost without sacrificing reclamation quality. Benefits emerging from Groove System Implementation include; Reduced top soil volume usage for reclamation up to 73%; Reduced revegetation cost up to 49% or IDR 66,794,354/ha; Cost efficiency of planting media preparation up to IDR 168,000,000/ha; Increased tree survival rate up to 100%; Regulation mandate compliance of Post Mining Reclamation; Best practice pioneer of Post Mining Reclamation using Groove System
TOP SOIL USAGE EFFICIENCY UP TO 73% WITH THE IMPLEMENTATION OF GROOVE SYSTEM AT LIMESTONE MINE RECLAMATION AREA PT SEMEN INDONESIA (PERSERO) TBK
No full textBased on Law Number 3/2020, Good Mining Practice’s criteria are mining safety provisions, environmental management, and monitoring, including reclamation and post-mining activity, conservation of minerals and coal, and management of mine waste before being released into the environment. Directorate General of Mineral and Coal state's Strategic plan reclamation target for 2021 is 7.025 hectares and 7.050 hectares in 2022. PT Semen Indonesia, as one of the mining companies, is committed to supporting the reclamation target as stated in their Yearly Land Reclamation Plan. Mine floor reclamation on limestone quarry was generally performed using top soil spreading which cost up to 3,000 m3 of top soil per hectare area. Whereas top soil availability on site is limited. As a result, the existing top soil reserve could not fulfill the needs of reclamation to cover entire mining floor. The practice of Spreading Method depletes reserved top soil, causes excessive planting media preparation and revegetation cost. This challenging condition encourages PT. Semen Indonesia to innovate to suppress reclamation cost without reducing the success rate. The company concluded that Groove Planting System could reduce both top soil transport cost and revegetation cost, even increase the survival rate of the trees. This method reduced up to 2,200 m3 of top soil usage per hectare area, reduced top soil hauling cost, reduced tree planting and treatment, even increased the success rate of reclamation. With this innovation, company could suppress reclamation cost without sacrificing reclamation quality. Benefits emerging from Groove System Implementation include; Reduced top soil volume usage for reclamation up to 73%; Reduced revegetation cost up to 49% or IDR 66,794,354/ha; Cost efficiency of planting media preparation up to IDR 168,000,000/ha; Increased tree survival rate up to 100%; Regulation mandate compliance of Post Mining Reclamation; Best practice pioneer of Post Mining Reclamation using Groove System
KERANGKA REGULASI KEGIATAN PASCATAMBANG BENDUNGAN TAILING DI INDONESIA
No full textSelama 50 tahun terakhir, 63 kegagalan struktur bendungan tailing terjadi di seluruh dunia dan menunjukkan tren jumlah dan keparahan yang terus meningkat sejak tahun 1990. Di Indonesia, kegiatan pertambangan mineral logam menghasilkan ratusan juta ton tailing setiap tahun dan sebagian tailing tersebut ditempatkan pada bendungan tailing. Saat ini, terdapat 11 perusahaan yang mengoperasikan bendungan tailing termasuk satu perusahaan yang telah memasuki tahap Pascatambang. Secara umum, tujuan Pacatambang bendungan tailing adalah meminimalkan risiko kegagalan struktur jangka panjang yang dapat berdampak pada lingkungan dan masyarakat dengan tetap mempertimbangkan aspek teknis dan ekonomi. Tantangan terbesar dalam penutupan bendungan tailing di Indonesia adalah belum tersedianya regulasi yang memberikan kejelasan tentang tanggung jawab perawatan dan pemantauan bendungan tailing setelah kegiatan operasi produksi berakhir.Kegiatan Pascatambang bendungan tailing di Indonesia mengikuti regulasi di Kementerian Energi dan Sumber Daya Mineral (ESDM), Kementerian Perkerjaan Umum dan Perumahan Rakyat (PUPR), serta Kementerian Lingkungan Hidup dan Kehutanan (LHK). Regulasi sektor ESDM mengatur kegiatan pertambangan secara umum, sektor PUPR mengatur perencanaan, pembangunan, pengoperasian, dan penghapusan fungsi bendungan sedangkan sektor LHK mengatur penempatan tailing yang dikategorikan sebagai limbah bahan berbahaya dan beracun (B3).Sesuai regulasi di sektor ESDM, program dan jangka waktu Pascatambang dituangkan dalam dokumen rencana Pascatambang yang disusun sebelum perusahaan memasuki tahap operasi produksi. Izin Usaha Pertambangan (IUP) untuk operasi produksi dapat diberikan paling lama selama 20 tahun dengan dua kali masa perpanjangan masing-masing selama 10 tahun. Sedangkan sektor PUPR mewajibkan pengelolaan pasca penghapusan fungsi bendungan dengan jangka waktu yang tidak terbatas. Selain itu, sektor LHK mewajibkan pemantauan lingkungan hidup selama 30 tahun setelah penghentian kegiatan penimbunan tailing. Oleh karena itu, untuk memberikan kepastian hukum untuk investasi pertambangan mineral dan batubara di Indonesia diperlukan sinkronisasi kebijakan antar sektor sehingga dapat disusun regulasi bersama yang memberikan kejelasan kriteria keberhasilan Pascatambang untuk bendungan tailing dengan tetap memperhatikan aspek keselamatan dan perlindungan lingkungan
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
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