1,721,014 research outputs found
Current Occurrence and Control of Liriomyza Leafminers in Taiwan
No full text非洲菊斑潛蠅 (Liriomyza trifolii (Burgess))、番茄斑潛蠅 (L. bryoniae (Kaltenbach)) 及蔬菜斑潛蠅 (L. sativae (Blanchard)) 為世界上重要之檢疫害蟲。台灣地區自 1984～1995 年間雖曾陸續發生上述三種斑潛蠅等之危害，但經研究人員之努力，目前三種斑潛蠅之發生已受控制。為加強海峽兩岸對害蟲防治方法之交流，本文報導台灣地區三種斑潛蠅之分類、寄生蜂相研究、生物性與生態觀察、蟲源與猖獗危害原因探討及防治等，藉供斑潛蠅防治之參考。
The polyphagous leafminers, Liriomyza trifolii (Burgess), L. bryoniae (Kaltenbach) and L. sativae (Blanchard) are important quarantine insect pests throughout the world. Although these leafminers seriously damaged ornamentals and vegetables during 1984 to 1995 in Taiwan, however, they have been under controlled. In order to fortify the exchange between the strait on the pest control methods, the current situation with regard to the classification and the parasitoids of Liriomyza in Taiwan are reported in this paper. The biology, ecology, the source, the outbreak and the control of L. trifolii, L. bryoniae and L. sativae are reviewed
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
Biological Control of Citrus Psyllid, Diaphorina citri in Taiwan.
No full textCitrus psyllid, Diaphorina citri Kuwayama, a vector of citrus greening disease, is an insect pest of citrus. From 1983 to 1990 the Taiwan Agricultural Research Institute introduced Tamarixia radiate (Waterston) from Reunion and evaluated its efficiency against D. citri based on its controlling ability, synchronization with host, competition or synergism with Diaphorencyrtus diaphorinae (Lin and Tao), and parasitism by hyperparasitoids. The influence of a disturbed habitat on fluctuations in the population of D. citri and its parasitoids was interpreted, using biological data such as longevity, oviposition behavior and reproduction type. The use of parasitoids in the IPM for D. citri and greening disease is discussed
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
Utilization of Natural Enemies to Control of Pysllid Vectors Transmitting Citrus Greening
No full textSince most insect vectors cause indirect injury to crops, the utilization of natural enemies for their control is considered as a promising. A case study was done on an Eulophid parasitoid Tamarixia radiata introduced in Taiwan to control Diaphorina citri, the insect vector of the citrus greening disease. The biological data of T. radiata were collected in the laboratory. Results showed that T. radiata preferred the 5th istar D. citri nymphs as its host. High percentage of parasitism was found on Jasmine orange hedges which had relatively high host density. Pruning hedges adversely affected the parasitism by T. radiata
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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