1,720,970 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Ragam Dan Potensi Jamur Makro Asal Taman Wisata Mekarsari Jawa Barat
No full textTaman Wisata Mekarsari (TWM) merupakan salah satu daerah penyangga ekosistem dan pusat pelestarian keanekaragaman hayati di Indonesia. Keragaman jamur makro asal serasah dan tanah di TWM belum pernah dilaporkan sebelumnya. Jamur merupakan organisme penting dalam siklus materi karena kemampuannya mendegradasi bahan organik pada ekosistem. Tujuan dari penelitian ini adalah untuk menyediakan informasi mengenai keragaman jamur makro di TWM untuk pemanfaatan potensinya di masa mendatang. Sebanyak 20 jenis dan 16 genus jamur makro berhasil dikoleksi dari TMW pada penelitian ini. Identifikasi jamur dilakukan dengan menggunakan berbagai karakter makroskopik. Pada tulisan ini dijelaskan cara deskripsi karakter makroskopik untuk membantu identifikasi jamur. Jamur yang berhasil diidentifikasi pada penelitian ini adalah Amanita sp.1, Amanita sp.2, Auricularia sp., Collybia sp., Clitocybe sp., Crepidotus sp., Cyathus sp., Ganoderma sp., Lepiota sp.1, Lepiota sp.2, Marasmius sp., Naucoria sp.1, Naucoria sp.2, Omphalina sp., Panaeolus sp., Parasola sp.1, Parasola sp.2, Pluteus sp., Scizophyllum sp., dan Xylaria sp. Beberapa jamur yakni Auricularia, Clitocybe, Ganoderma, dan Scizophyllum yang ditemukan berpotensi sebagai bahan pangan dan obat. Inventarisasi data keragaman yang baik akan membantu upaya pengelolaan dan pelestarian kekayaan sumber daya hayati di Indonesia
Identifikasi Jamur Beracun Clitocybe sp. di Gresik, Indonesia (Studi Kasus)
No full textJamur liar merupakan salah satu bahan pangan yang sering dicari oleh masyarakat Indonesia ketika merambah di hutan ataupun sekitar tempat tinggalnya. Namun, karena morfologi jamur yang bisa dikonsumsi dan jamur beracun seringkali terlihat mirip satu sama lain, maka kasus keracunan jamur menjadi risiko yang tidak terhindarkan. Seorang pemuda mengonsumsi jamur liar yang dikoleksi dari pekarangan rumahnya di Gresik, Jawa Timur. Jamur tersebut tumbuh pada tanah berhumus dengan beberapa tanaman di sekitarnya. Korban salah mengenali jamur tersebut sebagai Termitomyces ataupun Agaricus yang bisa dikonsumsi. Setelah seorang teman juga mengkonfirmasi edibilitas dari jamur tersebut, korban segera memasak dan mengkonsumsi jamur yang ditemukan. Beberapa jam kemudian korban mengalami muntah-muntah, mual, pusing, dan hilang keseimbangan. Korban segera mendapatkan pertolongan pertama berupa air kelapa oleh keluarganya. Setelah 4-5 jam mengalami muntah sebanyak tujuh kali, kondisi korban mulai membaik dan bisa kembali beraktifitas normal. Jamur yang menyebabkan keracunan kemudian didokumentasikan dan dibuatkan pertelaan karakter basidiomata. Hasil identifikasi dengan pendekatan beberapa karakter makroskopik mengkonfirmasi jamur tersebut sebagai Clitocybe sp. Jamur ini sebelumnya telah dilaporkan memiliki kandungan racun muscarine. Tulisan ini merupakan salah satu dari sedikit publikasi keracunan jamur yang dilengkapi dengan informasi jamur lengkap dan dilengkapi deskripsinya di Indonesia. Studi ini mengindikasikan bahwa diperlukan kehati-hatian dan observasi informasi yang lengkap sebelum mengonsumsi jamur liar yang belum diketahui identitasnya
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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