1,723,017 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
(41(2):178-186)環氨基丙烷羧酸及益收素對試管內蝴蝶蘭苗之生理影響
No full textPhalaenopsis plantlets in 50.0ml flask received 0, 2, 5, 10, 20 ppm Ethrel and 0.01, 0.1, 1 mM 1-aminocyclopropane-1-carboxylic acid (ACC) to study the physiological influence of Ethrel and ACC through culturese in vitro. Ethylene was produced by either the addition of Ethrel or ACC in flask. The treatment of 5.0, 10.0 ppm Ethrel shortened and swelled the roots and produced vigorous plantlets which took the advantage of survival and less mechanical injury during transplant from flasks. However, 20ppm Ethrel induced overdosage effect. The treatment of 0.1 mM ACC produced good quality plantlets as well as 5.0, 10.0 ppm Ethrel. The addition of 1 mM ACC caused small, curl leaf and shorter roots which presented the deteriorated effect on damage of roots and stunted growth of plantlets. The ACC content in different parts of plantlet was determined. The higher ACC residue was existed in root than in central young leaf and older leaves.
蝴蝶蘭幼苗於50毫升三角瓶內以0，2.5，5，10，20 ppm的益收素（Ethrel）及0.01，0.1，1mM的環丙烷氨基羧酸（1-aminocyclopropane-1-carboxylic acid，ACC）以研究二者對蝴蝶蘭幼苗之生理影響。二者均可產生乙烯。試驗結果顯示以益收素5.0及10.0 ppm可以使根部縮短肥大，植株健旺，有利於瓶苗移植減少操作時機械傷害。但是益收素濃度在20 ppm時則有藥劑過量現象。以0.1mM的環丙烷氨基羧酸亦得到與益收素5.0及10.0ppm處理效果一樣優良瓶苗，處理濃度在1mM時造成葉片變小、捲葉、根短、顯示了有害於根部及阻礙生長的現象。環丙烷氨基羧酸之含量分別於不同部位檢測，根部留存量較高於葉片部分
(27(3):223-227)Studies on the prodution of mung bean sprouts with the plant hormone
No full text本研究之主要之目的為探討使用適當植物荷爾蒙栽培綠豆芽，以提高產量和品質。依外觀觀察，綠豆芽彎鈎部位可作鑑定處理別之檢定關鍵•蛋白質測定以Ethrel (2-chforoethyl phosphonic acid)及2,4-D (2,4-Dichloro phenoxyacetic acid)之處理均可提高蛋白質含量。掃描式電子顯微鏡觀察顯示，Ethrel及2,4-D均可使下胚軸之皮層細胞擴大。本文建議綠豆芽以Ethrel 10 ppm處理具有商業利用價值且無藥劑殘餘量對人體健康可謂無虞。
A study for promoting quality and yield mung bean sprout cultivation with the excellent plant hormone.
Morphological observation showed that the hook of mung bean sprouts is the key to identifying of treatments. It is showed that the key is the method of biological test.
Protein analysis showed that Ethrel and 2,4-D treatments increased the cotent of mung bean sprouts.
Scanning electronic microsopy showed that Ethrel treatment and 2,4-D treatment induced the enlargement of cortex cell of the hypocotyl section.
It is suggested that mung bean sprout treated with 10 ppm of Ethrel should be valliable in the commercial production of mumg bean sprouts, proccided that residue would not be a problem for human health
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
(30(2):141-145)Studies on the colonal propagation of Phalaenopsis by root culture
No full text本研究在探討蝴蝶蘭根組織培養明確之配方。結果摘錄如下：1. 蝴蝶蘭根經B5無機鹽及有機鹽，100 mg / 1 myo-inositol, 309 / l 蔗糖，5 mg / 1 Naphthaleneacetic acid ( NAA ) , 10mg / 16 -furfurylaminopurine ( Kinetin )的培養基（pH 5.5）誘導，得癒合組織及芽球相似物突起。2. 芽球相似物繼代培養於相同配方的固態培養基6個月後形成蝴蝶蘭幼植株。3. 芽球相似物僅能在根尖部位形成。4. 照光與未照光處理對芽球相似物之誘導均未有顯著之影響。This paper describes an efficient method of clonal propagation through Phal aenopsis root cuitued in vitro. The result as summaried as follows:
Calli and protocorm like bodies (PLB) were induced from root tip by using Gam borg’s B5 basal medium with 100mg/l myo-inositol, 30,000mg/l sucrose, 5mg/l NAA and 10mg/l kinetin. The pH was adjusted to 5.5. In similar solid medium, the PLB were then developed into baby phalaenopsis plants in 6 months. The formation ability of PLB was only on root tip. There is no significant variation between light and dark treatment
(31(3):220-224)Studies on Tissue Culture of Cactus (Gymnocal ycium minansvichii Var.)
No full text含有4 mg / 12,4-dichlorophenoxyacetic acid（2,4-D）及1mg / l 6-furfurylamin – opurine（Kinetin）之Gamborg（3）修正配方培養基培養緋牡丹仙人掌（Gymnocalycium minansvichii Var.）的仔球不定芽組識可達到大量繁殖的目的。9,000 lux 之照光有利於Callus 之形成，黑暗下形成之Callus 呈白化現象。將Callus 培養於含有10 mg / 1 Naphthalenecetic acid ( NAA ) 及5 mg / l Kinetin 之Gaoborg 修正配方培養基可誘導器官之分化。
Mass In Vitro propagation of red cactus (Gymnocalycium minansvichii Var. )can be achieved by culturing auxilary bud of plantlets on modified Gamborg medium containing 4 mg/l 2, 4-dichlorophenoxyacetic acid (2, 4-D) and 1 mg/l furfurylaminopurine (Kinetin). Light treatment 9,000 lux in intensity promoted more callus formed. Calli formed in dark showed albinism. Modified Gamborg medium used for organogenesis contains 10mg/l naphthaleneacetic acid (NAA) and 5mg/l kinetin
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