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Contribution to the criteria and methods for the embankment dams safety evaluation including the integration of monitoring data
No full textОвај рад настоји да пружи допринос формирању доследне методологије за процену сигурности постојећих насутих брана, која се ослања на пробабилистички концепт, узимајући при томе у обзир податке техничког осматрања. Таквим приступом систематски се обухватају бројни елементи варијабилности уткани у природу геотехничких проблема, укључујући и варијабилност самих података осматрања.
Изложена је квази-бајесијанска методологија за процену сигурности постојећих насутих брана која интегрише податке осматрања, уз уважавање њиховог стохастичког карактера, у оквир пробабилистичке Монте-Карло анализе на МКЕ моделу бране, не захтевајући при томе калибрацију статистичких расподела улазних параметара модела. Оваквим приступом добијају се резултати анализе поузданости који боље одражавају стварно понашање конструкције, а истовремено омогућавају доследну процену утицаја варијабилности свих релевантних параметара на ниво сигурности.
Предложена методологија омогућава јединствену синтезу примене различитих нумеричких техника из домена теорије поузданости, напредних тродимензионалних нелинеарних МКЕ анализа и сурогат моделе засноване на машинском учењу. Примена ових техника спроведена је у овом раду у циљу побољшања ефикасности и тачности резултата пробабилистичке анализе, чиме се обезбеђује свеобухватна, поуздана и рачунски ефикасна процена сигурности постојећих насутих брана у складу са савременим инжењерским тенденцијама.
Основне идеје предложене методологије су најпре верификоване на једноставним примерима, након чега је методологија у целости примењена на студију случаја насуте бране Првонек, где је спроведена комплетна пробабилистичка анализа сигурности са интеграцијом расположивих података осматрања.
Кључни иновативни елемент методологије је увођење тежинских коефицијената за сваку симулацију Монте Карло анализе, чиме се изражава различит ниво поверења у исходе на основу њихове сличности са стварно забележеним понашањем бране. У студији случаја на примеру бране Првонек показано је да укључивање података осматрања значајно повећава индекс поузданости у односу на анализу без интеграције података осматрања, при чему расподеле резултата много боље репродукују осмотрено понашање конструкције.
Добијени резултати потврђују делотворност и применљивост предложене методологије за процену сигурности брана. На тај начин, дисертација даје допринос унапређењу теоријског оквира и инжењерске праксе у области сигурности насутих брана, пружајући поузданију основу за процену ризика и доношење одлука у погледу експлоатације и одржавања ових објеката.This study aims to contribute to a coherent methodology for evaluating the safety of existing embankment dams by creating a probabilistic approach that explicitly incorporates monitoring data. The approach systematically captures the full spectrum of uncertainties inherent in geotechnical problems, including the variability within the monitoring records themselves.
The thesis introduces a Bayesian-inspired methodology to directly integrate actual dam monitoring records, with full recognition of their stochastic character, into a Monte Carlo probabilistic safety assessment using a finite element framework, without recalibrating the original input parameters distributions. The resulting reliability estimates more faithfully reflect the actual observed behaviour of the structure while enabling a consistent appraisal of how all relevant sources of variability influence the safety.
The numerical framework established in this thesis unifies advanced reliability techniques, nonlinear 3D finite-element (FE) analyses, and machine-learning-based surrogate modelling. Their combined use improves both the efficiency and accuracy of probabilistic analyses, providing a comprehensive, reliable, and computationally tractable approach that aligns well with a modern engineering practice.
After verification on simple benchmark problems, the complete procedure is applied to a case study of the Prvonek embankment dam, where a full probabilistic safety analysis with monitoring data integration is performed.
A key innovative element of the proposed methodology is the introduction of weighting coefficients for each Monte Carlo simulation, expressing varying degrees of confidence in individual outcomes according to their similarity to the observed dam behaviour. For the Prvonek case study, incorporating monitoring data markedly increases the reliability index relative to an analysis that ignores monitoring data, while the resulting response distributions reproduce the observed behaviour much more closely.
The results demonstrate the effectiveness and practical applicability of the proposed methodology for dam safety evaluation, therefore contributing to the development of the theoretical framework and engineering practice in the field of embankment dam safety assessment. The thesis offers a more robust foundation for risk evaluation and decision-making regarding the operation and maintenance of these critical structures
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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