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    Sosialisasi Pemanfaatan Asap Cair Hasil Karbonisasi Tempurung Kelapa di Perkebunan Karet PTPN VII Unit Kedaton

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    Tanaman kelapa merupakan salah satu komoditas sektor perkebunan yang mempunyai peran dan kontribusi penting bagi Kabupaten Lampung Selatan. Umumnya, tempurung kelapa sebagai hasil samping perkebunan hanya digunakan sebagai bahan baku pembuatan arang aktif. Mempertimbangkan potensi limbah tempurung kelapa yang belum dimanfaatkan secara maksimal, tim Pengabdian kepada Masyarakat (PKM) Institut Teknologi Sumatera (ITERA) merancang dan membangun tungku karbonisasi dan alat distilasi di desa Muara Putih, Natar yang menghasilkan produk arang aktif dan asap cair. Asap cair dapat dimanfaatkan sebagai biopestisida dan koagulan alami penggumpal lateks. Kegiatan sosialisasi pemanfaatan asap cair sebagai koagulan alami lateks dilaksanakan di Stasiun Penerimaan Lateks PT. Perkebunan Nusantara VII Unit Kedaton. Dilakukan demonstrasi langsung untuk membandingkan penggumpalan lateks oleh asap cair dan asam formiat sebagai koagulan kimia yang umum digunakan. Asap cair sebagai koagulan alami lateks memberikan waktu koagulasi yang lebih cepat dan menghasilkan lebih banyak koagulum. Sosialisasi ini memberikan informasi tentang nilai lebih pemanfaatan asap cair sebagai koagulan lateks kepada petani karet. Tungku karbonisasi dan unit distilasi yang dibangun oleh tim PKM mengolah limbah tempurung kelapa menjadi asap cair yang dapat digunakan sebagai alternatif koagulan lateks. Kata kunci: Asam formiat, Asap cair, Karet, Koagulan lateks, Tempurung kelap

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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

    BIODEGRADATION OF POLYETHYLENE AND POLYETHYLENE OXO-DEGRADABLE BY BACTERIAL ISOLATE FROM CONTAMINATED LAMPUNG BAY

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    Pandemi COVID-19 mendorong peningkatan kesadaran masyarakat terhadap kebersihan dengan penggunaan material sekali pakai seperti plastik dan masker. Hal ini menimbulkan pencemaran mikroplastik di lingkungan sehingga diperlukan upaya penanggulangan salah satunya melalui proses biodegradasi. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan isolat bakteri dari perairan tercemar Teluk Lampung terhadap degradasi plastik polietilena dan plastik polietilena oxo-degradable. Proses biodegradasi dilakukan menggunakan isolat bakteri terpilih dari Pantai Sukaraja, Lampung yang diinkubasi selama 21 hari. Media Mineral Salt Medium tanpa penambahan sumber karbon digunakan pada tahap penapisan dan proses degradasi. Pada proses degradasi, isolat bakteri terpilih diinkubasi bersama sampel plastik PE dan PE oxo-degradable dengan kontrol tanpa penambahan isolat. Semua sampel hasil degradasi kemudian dianalisis dengan gravimetri yang menunjukan adanya penurunan berat pada setiap variasi sampel yaitu kontrol plastik PE, plastik PE, kontrol plastik PE oxo-degradable, serta plastik PE oxo-degradable masing-masing sebesar 12,3%,  17,31%, 8,9%, dan 10,84%. Penelitian ini menunjukkan penambahan isolat bakteri terpilih dari Teluk Lampung mempengaruhi degradasi plastik PE dan PE oxo-degradable

    Dispelling the Myths Behind First-author Citation Counts

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    We 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

    Author Index

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    koamabayili/VECTRON-author-checklist: VECTRON author checklist

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    We 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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