1,720,953 research outputs found
A whole-canopy gas exchange system and field managements effects on strawberry whole-canopy photosynthesis
No full text調查田間的植物生理表現，可協助研究者判定田間環境，如光照強度或溫度，與栽培管理對於作物生長與產量之影響。測量草莓(Fragaria ×ananassa Duch.)之全樹冠氣體交換率為本研究目的之一，故設計出一擁有透明樹冠葉箱之可攜式全樹冠氣體交換系統。透明樹冠葉箱使得穿透之日光強度下降17%，而藉由調整系統內空氣流速，使得氣流有足夠時間與草莓植株進行氣體交換，並帶走累積於樹冠葉箱之多餘熱能，此一設備可獲得草莓植株生長量與¬二氧化碳及水氣交換率之良好相關性。本研究並調查於北台灣盛行之塑膠棚栽培系統，對於草莓生長與全株氣體交換之影響。塑膠棚栽培系統使得日照強度下降30%，造成 ‘豐香’草莓全樹冠光合作用率減少30%。於產季後半季時，植株葉面積減少35%，並由於日照強度不足使得草莓植株乾物重下降60%。此研究另調查蟎類藥劑fenpyroximate對於草莓生長與葉片氣體交換之影響，以水溶液濃度為0、1及2 ml‧l-1之5%fenpyroxmate噴施於‘豐香’草莓葉片進行試驗。草莓葉片淨光合作用會於蟎類藥劑fenpyroximate噴施一日後暫時上升,但fenpyroximate對於草莓葉片生長與花朵數量無顯著性影響。這些結果指出，於塑膠棚之日照強度降低，可能導致草莓產量下降。而於非有機生產之草莓園，蟎類藥劑fenpyroximate於正常使用濃度下，因不會對植株造成永久性傷害，仍為有效之蟎類控制方法。Investigation of plant physiology performances in fields could assist researchers to evaluate the effects of environment condition and cultural practices on crop growth and yield. To measure whole canopy gas exchange of strawberry (Fragaria ×ananassa Duch.) plants, we designed a portable whole canopy gas exchange system with clear canopy chambers. The clear canopy chambers allow sun light penetration with 17% decrease of light intensity. Air flow was adjusted to maintain a good retention time for gas exchange while minimizing heat accumulation in the chamber. Good correlations among plant size, CO2, and H2O exchange were obtained. We also investigated strawberry growth and whole plant photosynthesis under the plastic tunnel system which is popular in Northern Taiwan. The plastic tunnel system caused 30% declination of light intensity and resulted in 30% reduction of whole canopy photosynthesis in ‘Toyonoka’ strawberries. Consequently, plants under plastic tunnels had 35% less total leaf area and 60% less dry weight then the control. In the third part of this research, we assessed the effects of miticide fenpyroximate on growth and leaf gas exchange in strawberries. 5% fenpyroximate at the concentrations 0, 1, or 2 ml‧l-1 were applied to ‘Toyonoka’ strawberry leaves. The leaf net photosynthesis would increase temporarily one day after fenpyroximate application, but there was no significant influence of fenpyroximate on leaf and flower growth. These results showed that insufficient of light intensity may cause strawberry yield loss, but fenpyroximate is still a good method in non-organic production systems for strawberries protection in the proper application rate which did not injury crops permanently
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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