1,720,953 research outputs found
Numerical Parametric Study of Ventilated Shading Plates Energy Performance in Summer
No full text近年來通風遮陽板或遮陽牆系統於增強建築立面外牆夏季隔熱能力的應用逐漸增多，但文獻中對於此種通風遮陽牆的隔熱效益探討多為案例討論，缺乏各種參數與遮陽牆隔熱能力的關係式，在比較各種不同參數組合下的遮陽牆隔熱能力時會產生困難。文獻也缺乏探討流道壁面的輻射放射率的影響。本研究旨在以數值模擬分析影響遮陽板隔熱能力的變數，最終發展出包含多項參數之泛用通風遮陽板隔熱能力關係式，此關係式可使得比較各種不同參數條件下的遮陽板隔熱能力更容易。本研究使用商用計算流體力學(CFD)軟體FLUENT作為二維數值模擬分析的工具，模擬結果與文獻實驗以及實際設施的量測結果進行比較驗證。研究結果顯示壁面放射率的降低對遮陽板隔熱性能有顯著的提升；入熱量在流道寬度增大到一定程度後即不會有太大變化。本研究也分析了天氣環境變數對等效熱阻的影響，並運用熱電路節點觀念，可得到誤差更小的遮陽板等效熱阻關係式。以此為基礎拓展其適用範圍加入更多變數，最終得到了泛用的遮陽板隔熱能力關係式，只要是流道高為3m，流道寬在0.1m以上的通風遮陽板，均可利用本研究得到的泛用等效熱阻或入熱量關係式進行通風遮陽板隔熱能力的快速估算。泛用關係式的參數包括了太陽輻射量Ia、室內外溫差ΔT、等效流道壁面放射率ε_eff以及外牆體熱阻Rw。依入熱量對Ia和ΔT的敏感度分析，在太陽輻射量相對較強的地區，加入成本考量，選擇降低等效流道壁面放射率ε_eff是較合適的隔熱策略；而在室外溫度相對較高的地區，選擇提高外牆體熱阻Rw是較合適的隔熱策略。利用泛用等效熱阻進行動態模擬可在不同的天氣條件、不同的Rw、ε_eff設置下，與實際以流道進行的模擬結果比較有著不錯得一致性，因此泛用等效熱阻關係式可應用於減少動態模擬的計算時間。The use of Ventilated Shading Plates or Ventilated wall systems to improve the thermal insulation of vertical walls in buildings has increased in recent years. However, most research on the energy performance of such Ventilated wall has been case studies. Due to the lack of literature reporting the energy performance correlations as functions of numerous parameters, it is difficult to compare the energy performance of Ventilated wall under different sets of parameters. There has been also relatively little research about the influence of radiation emssivity of flow channel surface. The purpose of this study was to investigate the parameters affecting the energy performance of Ventilated Shading Plates by numerical simulation and to provide a general energy performance correlations as functions of numerous parameters. These correlations permit a simple way to compare the energy performance of Ventilated Shading Plate. The simulations were conducted using commercial CFD code, FLUENT. Simulation results were compared with experimental data to validate the simulation model. Results of this study showed that thermal insulaton of Ventilated Shading Plate is increased sensibly as the radiation emssivity of flow channel surface decreased. The heat gain will not change much as the flow channel width increased to a certain extent. The influence of climatic condition on the equivalent thermal resistance of Ventilated Shading Plate was also investigated. We proposed a equivalent thermal resistance correlation with smaller error by the aid of thermal resistance network concept. Then general correlations was proposed by adding more parameters. The presented equivalent thermal resistance correlation and heat gain correlation can be used to estimate the thermal energy performance of Ventilated Shading Plate whose height and width are 3m and greater than 0.1m respectively. The general correlations are functions of absorpted solar radiation Ia, temperature difference between indoor and outdoor ΔT, effective emissivity of flow channel surface ε_eff, and thermal resistance of vertical wall Rw. The sensitivity analysis of heat gain against Ia and ΔT showed that decreasing effective emissivity of flow channel surface ε_eff is a more appropriate strategy in areas with relatively strong solar radiation. It also showed that increasing thermal resistance of vertical wall Rw is a more appropriate strategy in areas with relatively high outdoor temperature. The dynamic simulation results applying equivalent thermal resistance were in good agreement with the results from direct CFD simulations for different climate conditions and different Rw, ε_eff. Therefore, the general equivalent thermal resistance correlation can be used to reduce the computation time of dynamic simulations
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
- …
