1,720,988 research outputs found
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
STUDI EKOLOGI TUMBUHAN ASING INVASIF Bellucia pentamera Naudin DI KAWASAN HUTAN BERNILAI KONSERVASI TINGGI PT. KENCANA SAWIT INDONESIA
Full text linkJudul penelitian ini adalah “Studi Ekologi Tumbuhan Asing Invasif Bellucia pentamera Naudin di Kawasan Hutan Bernilai Konservasi Tinggi PT. Kencana Sawit Indonesia”. Hasil penelitian ini disusun oleh Solfiyeni, dibawah bimbingan dan arahan Prof. Dr. Erizal Mukhtar, M.Sc., Prof. Dr. Syamsuardi, M.Sc. dan Prof. Dr. Chairul, MS.
Laju kerusakan hutan akhir-akhir ini berlangsung sangat cepat yang mengakibatkan hilangnya sebagian tutupan hutan. Kondisi ini memberi peluang masuknya jenis tumbuhan asing yang bersifat invasif. Invasi tumbuhan asing invasif di suatu wilayah hutan dapat mengubah komposisi spesies, struktur, dan iklim mikro kawasan hutan yang diinvasi. Bellucia pentamera adalah salah satu tumbuhan asing invasif berupa pohon dengan daya invasinya yang kuat. Dampak buruk dari invasi terhadap vegetasi dan iklim mikro, faktor-faktor yang mempengaruhi sebaran serta potensi invasifnya masih belum dipelajari secara rinci.
Tujuan umum dari penelitian ini adalah untuk menganalisis ekologi dari spesies tumbuhan asing invasif B. pentamera. Tahap Pertama penelitian ini untuk menganalisis pengaruh tingkat dominasi B. pentamera terhadap komposisi jenis, struktur vegetasi dan iklim mikro. Tahap kedua untuk menganalisis faktor yang mempengaruhi sebaran spesies dengan komposisi keberadaan B. pentamera yang berbeda, dengan menggunakan drone dan pengukuran langsung di lapangan.Terakhir, tahap ketiga untuk menganalisis potensi invasi jenis invasif B. pentamera melalui tiga aspek, pertama aspek biologi reproduksi berupa kemampuan individu B. pentamera dalam memproduksi buah, jumlah produksi biji didalam satu unit buah, dan pada kondisi habitat yang bagaimana biji B.pentamera secara optimum berkecambah. Kedua adalahaspek kandungan senyawa alelokimia yang dihasilkan tumbuhan invasif B.pentamera dan ketiga adalah aspek dispersal yang difokuskan pada jenis hewan penyebar dan bagaimana hewan penyebar tersebut berasosiasi dengan B. pentamera.
Pada penelitian tahap pertama, analisis vegetasi dilakukan pada Lokasi 1 dan 2 (didominasi B. pentamera 60% dan 16%) dan Lokasi 3 (tidak ada individu B. pentamera). Pengambilan sampel dilakukan dengan menggunakan metoda nested plot untuk mengumpulkan data vegetasi pohon, pancang dan tumbuhan bawah untuk setiap lokasi. Komposisi tumbuhan menunjukkan perbedaan dari masing-masing lokasi penelitian. Basal area juga berbeda secara signifikan antar lokasi untuk tingkat pohon tetapi tidak untuk tingkat sapling. Lokasi 1 didominasi oleh B. pentamera dengan Indeks Nilai Penting (INP) 130,8%, diikuti oleh Croton argyratus (27,63%), dan Ficus variegata (26,47%). Pada Lokasi 2, B. pentamera mendominasi (33,68%), diikuti oleh Lepisanthes sp. (20,01%) dan Sizygium sp. (14,44%). Lokasi 3 didominasi oleh Palaquium warsurifolium (21,15%) diikuti oleh Croton argyratus (20,02%) dan Macaranga hypoleuca (13,21%). Indeks keanekaragaman (H') untuk tingkat pohon dapat dikategorikan Sedang di Lokasi 1 (H' = 1,78) dan kategori Tinggi di Lokasi 2 dan 3 (H' = 3,48 dan 4,05). Indeks keanekaragaman untuk tingkat sapling dikategorikan Sedang di Lokasi 1 (H'=2,12) dan dikategorikan Tinggi di Lokasi 2 dan 3 (H'= 3.22 dan 3.84). Untuk tumbuhan bawah, indeks keanekaragaman dikategorikan Rendah di Lokasi 1 (H'= 0,82) dan Sedang di Lokasi 2 dan 3 (H'= 1,8 dan 2,86). Lokasi yang diinvasi oleh B. pentamera memiliki kadar air tanah yang lebih rendah dan suhu serta intensitas cahaya yang lebih tinggi, meskipun memiliki kandungan nitrogen dan fosfor yang lebih tinggi. Temuan ini menunjukkan bahwa invasi B. pentamera memiliki dampak negatif pada keanekaragaman hayati tumbuhan dan iklim mikro, namun dampaknya tidak jelas pada tanah.
Penelitian tahap kedua dilakukan pengamatan sebaran dengan foto udara dengan menggunakan Unmanned Aerial Vehicle (UAV) dan pengamatan langsung di lapangan. Tujuan dari penelitian ini adalah untuk mengetahui faktor-faktor yang mempengaruhi sebaran spesies B pentamera di kawasan hutan konservasi dengan komposisi keberadaan yang berbeda, baik secara horizontal maupun vertikal. Pengamatan foto udara menemukan sebanyak 40 pohonB. pentamera dan 32 pohon non-B. pentamera di kawasan hutan dengan tingkat invasi B. pentamera berbeda. Pohon B.pentamera tersebar merata pada celah yang besar dan secara acak pada celah kecil antara tajuk, sedangkan tingkat sapling dan tingkat seedling terdistribusi secara berkelompok, seragam dan acak, sesuai dengan kondisi mikrohabitat di bawah tajuk pohon B. pentamera. Sapling dan seedling B. pentamera terdeteksi lebih banyak di bawah kanopi pohon induk daripada di celah antar kanopi.
Penelitian tahap ketiga dilakukan untuk menganalisis potensi invasi jenis invasif ini dilakukan dengan survey langsung di lapangan untuk menghitung jumlah buah, jumlah biji per unit buah dan melakukan pengamatan hewan penyebar yang dilakukan dengan pemasangan kamera trap. Metoda eksperimen juga dilakukan dengan membuat perlakuan perbedaan intensitas cahaya terhadap perkecambahan serta uji kandungan alelokimia dari organ akar, batang dan daun. Hasil penelitian tahap ini menunjukkan Belluciapentamera memiliki potensi invasi yang besar melalui produksi buah dimana satu individu tingkat pohon berpotensi menghasilkan buah lebih dari 3000 dan jumlah biji rata-rata 4500 biji perbuah. Biji mampu berkecambah pada kondisi cahaya yang beragam dengan potensi perkecambahan berkisar antara 5,7% - 20,71 % dan perkecambahan paling tinggi pada intensitas cahaya 26% - 50%. Ditemukan sebanyak 9 species hewan penyebar buah B. pentamera yang didominasi oleh 2 jenis primate yaitu Macaca nemestrina dan Macaca fascicularis. Akar dan daun B. pentamera memproduksi senyawa alelokimia berupa fenol, plavonoid dan triterpenoid. Hasil analisis risiko menunjukkan aspek risiko tumbuhan invasif ini tergolong rendah dan fisibilitas pengelolaan tergolong tinggi. Rekomendasi prioritas pengelolaan B.pentamera dilokasi penelitian adalah ‘monitor’. Monitor dilakukan untuk mendeteksi perubahan nyata risiko spesies tumbuhan invasif B. pentamera, penyebaran dan review perubahan yang ada dalam keinvasifan species tumbuhan tersebut.
Berdasarkan hasil penelitian ini dapat disimpulkan bahwa invasi B. pentamera pada suatu kawasan hutan terganggu berdampak pada perubahan komposisi jenis dan penurunan keanekaragaman jenis. Strategi invasi B. pentamera mengisi celah kanopi dengan sebaran, tinggi dan luas kanopi yang berbeda-beda menyesuaikan kondisi mikrohabitat. B. pentamera memiliki potensi invasi yang besar dengan biologi reproduksi yang superior, mampu memproduksi buah dan biji yang banyak, serta dapat berkecambah pada intensitas cahaya rendah, sedang dan tinggi. B. pentamera juga mengandung senyawa alelokimia berupa fenol dan plavonoid
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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