1,720,954 research outputs found
KOMPOSISI DAN STRUKTUR KOMUNITAS FITOPLANKTON DI SUNGAI MASANG KECIL YANG MENERIMA ALIRAN LIMBAH CAIR PABRIK MINYAK KELAPA SAWIT DI KINALI, PASAMAN BARAT
Full text linkABSTRAK
Penelitian tentang Komposisi dan Struktur Komunitas Fitoplankton di Sungai
Masang Kecil yang Menerima Aliran Limbah Cair Pabrik Minyak Kelapa Sawit di
Kinali, Pasaman Barat dengan tujuan untuk mengetahui komposisi, struktur
komunitas fitoplankton dan mengetahui kondisi fisika kimia Sungai Masang Kecil,
Kinali Pasaman Barat. Penelitian ini dilaksanakan bulan November 2017 hingga
September 2018 dengan metode purposive sampling berdasarkan perbedaan rona
lingkungan. Hasil penelitian menunjukkan terdapat 7 kelas fitoplankton dengan
kepadatan tertinggi pada stasiun 2 (116,63 Ind./l). Indeks keanekaragaman
menunjukkan bahwa keempat stasiun termasuk kedalam kategori sedang dengan
equitabilitas cukup merata dan tidak adanya spesies yang mendominansi. Indeks
similaritas pada keempat stasiun >50%. Kondisi fisika kimia di Sungai Masang
Kecil, Kinali, Pasaman Barat termasuk stabil dan normal diantaranya suhu air (24°C-
30°C), pH (6-7), oksigen terlarut (5,24 ppm -7,05 ppm), fosfat (0,02-0,04 mg/l),
BOD (1,81-4,98 ppm), dan TSS (100-300 mg/l).
Kata Kunci : fitoplankton, komposisi, limbah cair sawit, struktur komunitas, Sungai
Masang Keci
SEBARAN SPASIAL DINOFLAGELLATA DAN KARAKTERISTIK FISIKA KIMIA AIR DI KAWASAN PERAIRAN PULAU-PULAU KECIL BUNGUS TELUK KABUNG, KOTA PADANG
Full text linkPenelitian ini telah dilaksanakan pada bulan Desember 2020 hingga Juli 2021 di Kawasan Perairan Pulau-Pulau Kecil Bungus Teluk Kabung, Kota Padang. Penelitian bertujuan untuk menganalisis sebaran spasial Dinoflagellata dan karakteristik fisika kimia air di kawasan perairan pulau-pulau kecil Bungus Teluk Kabung, Kota Padang. Penelitian ini menggunakan metode survei dan pengambilan sampel ditetapkan secara purposive random sampling. Berdasarkan penelitian ini didapatkan 58 spesies Dinoflagellata (2,9% dari spesies yang telah teridentifikasi) dengan 15 famili dan 2 kelas. Indeks diversitas Dinoflagellata pada kawasan perairan pulau-pulau kecil Bungus Teluk Kabung termasuk kedalam kategori sedang dengan penyebaran cukup merata pada seluruh lokasi. Distribusi jumlah spesies Dinoflagellata yang didapatkan pada penelitian ditemukan paling banyak pada lokasi Pulau Pasumpahan (32 spesies) dengan spesies yang mondominasi adalah Scrippsiella acuminata dan paling sedikit pada Pulau Sikuai (15 spesies). Spesies Dinoflagellata yang berpotensi menyebabkan blooming alga ditemukan sebanyak 13 spesies. Karakteristik fisika kimia air laut di lokasi penelitian masih sesuai dengan baku mutu air laut dan secara umum mendukung untuk pertumbuhan Dinoflagellata.
Kata kunci : blooming alga, Dinoflagellata, pulau-pulau kecil, sebaran spasia
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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