1,720,962 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Implementation of an electric vehicle charger with intelligent fault protection and power flow control functions in an interactive grid-to-vehicle and vehicle-to-grid strategy
Get PDFLisansüstü Eğitim Enstitüsü, Elektrik-Elektronik Mühendisliği Ana Bilim DalıFosil yakıtların doğaya olumsuz etkileri, artan akaryakıt fiyatları ve ülkeler arası savaşlar nedeniyle ülkeler alternatif yakıtlı ulaşım araçlarına yönelmişlerdir. Buna en iyi örnek elektrikli araçlardır. Elektrikli araçların kullanımının ve buna bağlı olarak elektrikli araç şarj istasyonlarının hızla yaygınlaşması, elektrik şebekesinde aşırı yüklenmelere ve farklı güç kalitesi problemlerine yol açacaktır. Aşırı yüklenmelerde takviye enerji kaynakları kullanılarak tepe yüklerin traşlanarak enerji talebinin karşılanması gerekir. Araçtan şebekeye (vehicle to grid=V2G) teknolojisi elektrikli araç bataryasındaki enerjiyi şebekeye aktarır. Elektrikli araç (EA) kullanımı, fosil yakıtların kullanımını azaltacak olmasına rağmen elektrik talebini ciddi miktarda artıracaktır. Bu sebeple güç kalitesi problemleri ve şebekedeki aşırı yüklenme sorunları artacaktır. V2G teknolojisi elektrikli araçların şebekeye olumsuz etkilerini azaltarak şebekeye destek verecek bir teknoloji olarak öne çıkmaktadır. Elektrikli araç sahipleri, tepe olmayan saatler süresince, daha düşük enerji fiyatıyla araçlarını V2G teknolojisi ile şarj edebilecektir. Şebeke yükünün en üst seviyeye çıktığı saatlerde de bir evin ihtiyacı olan enerji, elektrikli aracın bataryasından sağlanabilecektir. EA'ların potansiyelini en üst düzeye çıkarmak gelecekte büyük önem taşıyacaktır. EA'ların akıllı şebekeye basit bir geleneksel yük yerine akıllı şarj ve deşarj, yani iki yönlü şebekeden araca (grid to vehicle=G2V) ve araçtan şebekeye V2G çözümleri ile bağlanması bu tez çalışmasında amaçlanmıştır. Çift yönlü güç akışına sahip dönüştürücülerin literatürde çok sayıda ve farklı çalışma örnekleri mevcuttur. Şebekeden aracın bataryasını şarj etmek ve bataryadan şebekeyi besleyebilmek için kullanılan elemanların sayısı ve çeşidi, devrenin ekonomik ve zaman maliyeti ve karmaşıklığı yönünden önemlidir. Bu yüzden kullanılan eleman sayısının az tutulması amacıyla hem şebekeden araca hem de araçtan şebekeye güç akışı aynı devre üzerinden sağlanmaktadır. Devrede kullanılacak anahtarların sayısı arttıkça kontrol devresi ve kontrol yöntemlerinin karmaşıklığı da artacaktır. Bu tezde, çift yönlü enerji akışına sahip tek fazlı bir AA-DA dönüştürücü devresinin tasarımı ve uygulanması incelenmiştir. AA-DA dönüştürücü, bir şarj cihazı prototipi olarak kullanılmıştır. Şarj cihazı, IGBT ve diyotlardan oluşan H-köprüsü ve devamında düşürücü dönüştürücü ile yükseltici dönüştürücü devrelerinin aynı devre üzerinde bağlanması ile yapılmıştır. Uygulama olarak V2G modunda DA tarafında DA kaynağı olarak DA güç kaynağı ve G2V modunda çıkışta DA yük olarak rezistif reosta, G2V modunda AA tarafta da AA kaynak olarak güç şebekesi ve V2G modunda çıkış yüksüz olarak uygulanmıştır. Şarj cihazının şebeke kısmına koruma fonksiyonu olarak harici bir akıllı koruma devresi tasarlanmış ve uygulanmıştır. Yapılan çalışma ile akıllı koruma fonksiyonu olarak akıllı kesici (AKES) ve AA-DA doğrultucu dönüştürücü, düşürücü dönüştürücü, yükseltici dönüştürücü ve DA-AA dönüştürücü devreleri tek hat üzerinde bağlanarak senkronize edilmiş ve iki yönde de enerji akışı sağlanmış olup, kompakt bir yapı oluşturularak mevcut litetürdeki çalışmalara göre avantaj sağlanmıştır. AKES ile giriş hattı üzerinden alınan gerilim ve frekans değerleri ESP8266 WiFi modülü kullanılarak internet ortamına aktarılmıştır. G2V-V2G devresine ilişkin çalışma simülasyonları Matlab-Simulink ortamında gerçekleştirilmiştir. Uygulama aşamasında anahtarlamalar sinyal jeneratörü ve Arduino platformu, akıllı koruma fonksiyonları da Arduino platformu kullanılarak gerçekleştirilmiştir. Tez çalışmasında önerilen yapı ile şebekeden-araca ve araçtan-şebekeye güç aktarabilen ve akıllı koruma fonksiyonlarına sahip, EA şarj istasyonları ve şebeke ile güvenli şekilde bağlanabilecek bir prototip sistem geliştirilmiştir. Önerilen yapının pratikte yüksek akım ve güçlerde geliştirilecek modelleri ile prototip sistemin yüksek batarya kapasitesine sahip EA'lar için de uygulanabileceği düşünülmektedir.Due to the negative effects of fossil fuels on nature, increasing fuel prices, and wars between countries, countries have turned to alternative fuel vehicles. The best example of this is electric vehicles. The rapid spread of the use of electric vehicles and accordingly the electric vehicle charging stations will cause overloads in the electricity grid and different power quality problems. In overloads, the energy demand must be met by shaving the peak loads by using supplemental energy sources. V2G technology transfers the energy from the electric vehicle battery to the grid. The use of electric vehicles (EVs) will significantly increase the electricity demand, although the use of fossil fuels will decrease. For this reason, power quality problems and network overload problems will increase. V2G technology stands out as a technology that will support the grid by reducing the negative effects of electric vehicles on the grid. During off-peak hours, electric vehicle owners can charge their vehicles at a lower energy price. Even when the grid load is at its peak, the energy needed by a house can be supplied from the battery of the electric vehicle. Maximizing the potential of electric vehicles will be of paramount importance in the future. This thesis, it is aimed that EVs to provide smart charging and discharging, that is, bidirectional G2V-V2G solutions to the smart grid instead of a simple traditional load. There are many different studies in the literature on a converter with bidirectional power flow. The number and type of elements used to charge the vehicle's battery from the network and to feed the network from the battery are important in terms of the economic, time cost, and complexity of the circuit. Therefore, to keep the number of elements used low, power flow from the network to the vehicle and from the vehicle to the network is provided over the same circuit. As the number of switches to be used in the circuit increases, the complexity of the control circuit and control methods will also increase. In this thesis, the design and implementation of an AC-DC converter circuit with bidirectional energy flow with a single phase are investigated. The AC-DC converter was used as a charger prototype. The charger is made by connecting the H-bridge consisting of IGBT and diodes, followed by the step-down converter and the boost converter circuits on the same circuit. As an application, in V2G mode, the DC power source is applied as the DC source on the DC side and the resistive load is applied as DC load at the output in G2V mode, the power network is applied as the AC source on AC side in G2V mode and output is no load in V2G mode. An external intelligent protection circuit is designed and implemented as a protection function on the mains part of the charger. With the study, smart breaker (AKES) and AC-DC rectifier converter, step-down converter, step-up converter, and DC-AC converter circuits as a smart protection function was connected on a single line and synchronized and energy flow was provided in both directions, creating a compact structure. It has superiority over studies in the literature. The voltage and frequency values obtained from the input line with AKES were transferred to the internet using the ESP8266 WiFi module. Working simulations of the G2V-V2G circuit were carried out in a Matlab-Simulink environment. In the application phase, the switchings were made using the signal generator and the Arduino platform, and the smart protection function was made using the Arduino platform. With the proposed structure in the thesis study, a prototype system has been developed that can transfer power from the grid to the vehicle and from the vehicle to the grid, has smart protection functions, and can be securely connected to the EV charging stations and the grid. It is thought that the prototype system can also be applied to EVs with high battery capacity, with models to be developed in practice at high currents and powers of the proposed structure
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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