1,720,984 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
Frugivorous Flies on Bitter Gourd Fruit in Parigi Moutong Regency
Full text linkIn Indonesia, many people eat pariah as a vegetable. This plant can not only be consumed as a vegetable, but can also be used for medical purposes. Sample collection was carried out using purposive sampling technique. Samples taken were pariah fruits suspected of being infested by frugivorous fly pests. Sampling was done once in four different fields for each commodity. There were five types of frugivorous flies found on peria fruit, namely Z. cucurbitae, Z. calumniatus, Z. tau, A. Orientalis, and flies of the family Lonchaeidae species Silba sp. The highest proportion of flies found from peria fruit was Z. cucurbitae. The highest single percentage infestation of flies on peria fruit was A. orientalis. A. orientalis has the potential to infest fruit singly on peria fruit because it has the highest percentage of single infestation compared to other frugivorous flies. Parasitoids found were Psyttalia sp. and Fopius arisanus. Further research needs to be done on the single infestation of A. orientalis and Lonchaeidae, especially on peria fruit by inserting the flies into caged fruit at different maturity levels and varieties, so that it can be proven whether A. orientalis and Lonchaeidae can infest fruit singly on peria fruit and cucumber and how to control them so that the population level can be suppressed
DISTRIBUSI DAN HABITAT PERKEMBANGBIAKAN NYAMUK Aedes aegypti DI LINGKUNGAN KAMPUS UNIVERSITAS TADULAKO
Full text linkNyamuk merupakan salah satu vektor penyebab penyebaran penyakit di daerah tropis. Spesies nyamuk yang berpotensi tinggi menyebarkan penyakit salah satunya adalah Aedes aegypti. Ae. aegypti merupakan vektor utama dari penyakit Demam Dengue. Nyamuk ini ditemukan di daerah tropis dan subtropis. Nyamuk Ae. aegypti memiliki ciri khusus ditandai dengan pita atau garis-garis putih keperakan di atas dasar hitam, ukuran nyamuk Ae. aegypti berkisar sekitar 3-4 mm dengan ring putih pada bagian kakinya. Ae. aegypti menyukai air bersih sebagai tempat peletakan telur dan tempat perkembang biakannya. Faktor-faktor yang mempengaruhi nyamuk betina memilih tempat untuk bertelur adalah temperatur, pH, kadar ammonia, nitrat, sulfat serta kelembapan dan tidak terpapar matahari secara langsung. Penelitian ini bertujuan mengetahui keberadaan nyamuk Ae. aegypti dan memetakan habitat perkembangbiakan yang potensial nyamuk tersebut di lingkungan kampus Universitas Tadulako. Koleksi telur dilakukan dengan pemasangan ovitrap dan koleksi larva dilakukan dengan pengamatan visual. Berdasaran hasil koleksi ovitrap, ditemukan telur nyamuk lebih banyak pada ovitrap outdoor dibandingkan dengan ovitrap indoor. Hasil koleksi larva diperoleh paling banyak dari pot tanaman dengan genangan air. Hasil penelitian ini diharapkan dapat memberikan informasi baik kepada civitas akademik Universitas Tadulako maupun lingkungan di sekitar kampus terkait keberadaan vektor DD di lingkungan kampus dan habitat potensialnya
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
Eksplorasi Jenis-Jenis Ikan di Perairan Danau Lindu Provinsi Sulawesi Tengah
Full text linkAbstract: Fish are defined as vertebrates that live in water with characteristics of gills that function to take dissolve oxygen from water and fins used for swimming. This research aims to determine the species of fish that exist in Lindu Lake, Central Sulawesi Province. The method used is purposive sampling by using fishing gear net, fishing line and seser. Base on the result of this research was found 10 species of fish consisting of 9 Ordo and 6 Family, namely Oreochromis mossabicus, Oreochromis niloticus, Cyprinus caprio, Anabas testudineus, Osphroneus gourami, Anguilla marmorate, Aplocheilus panchax, Clarias batrachus, Channa striata and Puntius gonionatus. Abstrak: Ikan merupakan hewan bertulang belakang yang hidup di air dengan karakteristik memiliki insang yang berfungsi untuk mengambil oksigen terlarut dari air dan sirip yang digunakan untuk berenang. Penelitian ini bertujuan untuk mengetahui jenis ikan yang terdapat di Perairan Danau Lindu Provinsi Sulawesi Tengah. Metode yang digunakan adalah purposive sampling dengan menggunakan alat tangkap, pancing, dan seser. Berdasarkan hasil penelitian ditemukan 10 jenis ikan yang terdiri dari 9 ordo dan 6 family. Spesies ikan yang di peroeleh yaitu Oreochromis mossambicus, Oreochromis niloticus, Cyprinus carpio, Anabas testudineus, Osphronemus gourami, Anguilla marmorat, Aplocheilus panchax, Clarias batrachus, Channa striata dan Puntius gonionatus
Molecular Phylogeny of Stingless Bees in the Special Region of Yogyakarta Revealed Using Partial 16S rRNA Mitochondrial Gene
Full text linkSystematics of bees has developed rapidly. Several studies have attempted to infer the kinship between each group of bee. One way is the use of phylogenetic analysis using molecular data. This study explains the phylogenetic relationship of stingless bees in the Special Region of Yogyakarta, Indonesia based on the 16S rRNA gene. The research has been carried out in five districts and cities in the region from June to September 2019. In the study, the stages implemented include; place determination of stingless bees sampling, sampling, and molecular identification (DNA extraction, DNA amplification, and sequencing), followed by the data analysis using NCBI database and MEGA X software. The result of this study indicated that among seven morphospecies from Yogyakarta, there are six species of stingless bees that have a closest genetic relationship with the same species data from Genbank, namely Tetragonula laeviceps, T. iridipennis, T. sapiens, T. sarawakensis, Lepidotrigona terminata, and Heterotrigona itama. Since the genetic distances of T. laeviceps, T. iridipennis, T. sapiens, are wider than 3,5%, the data indicate that there is a possibility that the three morphospecies are actually belong to a different species with a similar morphology. Meanwhile, for the morphospecies T. biroi, the closest hit is on T. pagdeni 16S rRNA DNA because the T. biroi 16S rRNA DNA data is not available on the database. This study is expected to contribute to the preservation and utilization of one of Indonesia's important biodiversity resources
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
Morphometrics Variations of Carpenter Bees Xylocopa confusa Latreille and Xylocopa latipes Drury from Different Habitats in Central Sulawesi
Full text linkHabitat is a place for living things to grow and develop. Differences in physical characteristics of habitats within an area can affect the morphometry of an organism. This study aims to provide information related to the morphometric variation of the carpenter bees Xylocopa confusa Latreille and Xylocopa latipes Drury in different habitats in Central Sulawesi. The research was conducted in four types of habitat, namely primary forest, secondary forest, rural areas, and urban areas in January 2019. The collection of carpenter bees useds a sweep net by swinging it around the sampling location. The carpenter bees obtained were then killed in a killing jar for five minutes. The carpenter bees samples were put into a sample bottle based on the type of habitat. Furthermore, the pinning process was carried out using insect needles. The results showed that the physical characteristics of the different habitats could affect the morphometric variations of the carpenter bees Xylocopa confusa and Xylocopa latipes. The size of the body morphometry of carpenter bees is larger in primary forest habitats, while the smallest size of bees is found in urban areas. This research is useful as preliminary data before carrying out the cultivation and conservation process of wood bees considering that their role in nature is very important
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
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