1,720,962 research outputs found
Diversity and Composition of Dragonfly (Odonata) at The Punden Sumur Bumi Area, Surabaya, East Java
Full text linkThe Sumur Bumi Punden is a location used for spiritual tourism. The Punden Sumur Bumi area has a stagnant aquatic ecosystem type and a low level of disturbance and pollution. Therefore, the Punden Sumur Bumi area has the potential to be a natural habitat for dragonflies. This study aims to determine the diversity and composition of the dragonfly community in Sumur Bumi Punden. This study uses the visual day-flying observation technique modified by the transect method. The Punden Sumur Bumi area has a moderate diversity index value, with a value of H\u27 = 2.57. In the Sumur Bumi Punden area, 17 species were found with a total of 124 individuals, including the species with the highest relative abundance, namely Brachythemis contaminata. Meanwhile, the species with the lowest relative abundance was Diplacodes trivialis. The composition of dragonflies showed that the swamp location had the highest species richness and abundance values, namely 16 species and a total of 79 individuals. Meanwhile, the grassland location has the lowest species richness, namely only 5 species
Keanekaragaman dan struktur Komunitas Capung (Odonata) pada berbagai tipe habitat di Kecamatan Lakarsantri, Kota Surabaya
Full text linkKecamatan Lakarsantri merupakan salah satu area di Kota Surabaya yang memiliki berbagai tipe habitat perairan sehingga memiliki peran besar bagi keberlangsungan berbagai makhluk hidup terutama capung (Odonata). Capung merupakan serangga terbang yang sebagian besar siklus hidupnya dihabiskan di dalam perairan, sehingga keberadaan ekosistem perairan sangat penting bagi keberlangsungan hidup capung. Keanekaragaman dan struktur komunitas capung memiliki peran penting dalam suatu ekosistem, diantaranya yaitu sebagai bioindikator kualitas lingkungan dan predator serangga hama serta vektor penyakit. Tujuan penelitian ini yaitu untuk mengetahui keanekaragaman jenis dan struktur komunitas capung pada berbagai tipe habitat di Kecamatan Lakarsantri. Metode pengambilan data pada penelitian ini menggunakan metode Visual Encounter Survey (VES), yaitu metode pengamatan dengan menyusuri seluruh lokasi pengamatan yang telah ditentukan dengan mencatat keanekaragaman spesies capung dan menghitung jumlah individu dari setiap spesies capung yang teramati. Penelitian dilakukan pada 6 lokasi pengamatan selama bulan Juli, Agustus dan September 2021. Hasil penelitian ini menunjukkan bahwa terdapat 22 spesies dengan total 1028 individu dari 4 famili. Pada Nilai indeks keanekaragaman menunjukkan bahwa lokasi Kolam Terbuka memiliki nilai keanekaragaman capung tertinggi dengan nilai H’= 2,23 dengan ditemukan 19 spesies capung yang masuk dalam 4 famili dengan total 351 individu. Sedangkan lokasi dengan indeks keanekaragaman capung terendah yaitu pada lokasi Waduk Unesa dengan nilai H’= 0,55 dengan ditemukan 11 spesies capung dengan total 94 individu
Inventory and identification dragonfly Family Libellulidae at Slamet Reservoir, Surabaya, East Java
No full textSlamet Reservoir is an artificial reservoir located in the lowlands of urban areas. The existence of this reservoir with a stagnant water habitat type has great potential to become a natural habitat for various types of dragonflies, especially the Libellulidae family. This study aims to inventory and identify the types of dragonflies in the family Libellulidae in the Slamet Reservoir. In this study, the Visual Encounter Survey (VES) method was modified by using the Belt Transect method. This method is an observation by following a predetermined circular line. Sampling was carried out by catching adult dragonflies using insect nets and then preserving them using 50% acetone. After preservation, the body part of the dragonfly was measured using a caliper. The results showed that in the Slamet Reservoir there were 12 species of dragonflies from the Libellulidae family with a total of 131 individuals. The species with the highest relative abundance value in the Slamet reservoir is Brachythemis contaminata with a value of 51.15%. While the species with the lowest relative abundance values were Acisoma panorpoides, Diplacodes trivialis and Pantala flavescens with a value of 0.76%
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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