1,720,953 research outputs found
Chaos theory in digital twin-based facility management for maintenance and retrofitting
No full textLAUREA MAGISTRALETraendo ispirazione da una teoria matematica ben nota che non è mai stata considerata per l'ambiente costruito in modo olistico e riservata all'uso di altre discipline ingegneristiche, questa ricerca indaga la Teoria del Caos (TC) e il suo potenziale, rimasto trascurato nella gestione degli asset. La Gestione Delle Strutture (FM) è una delle fasi più dinamiche del ciclo di vita di un asset, e con la tecnologia del Gemello digitale (DT) che migliora la raccolta dei dati, emergono nuove opportunità per modellare la dinamica della FM utilizzando la TC. I sistemi FM interagiscono con le fasi pre e post, coinvolgendo numerosi parametri che generano più percorsi di sistema, rendendo difficile il controllo e la previsione. Inoltre, questi processi tollerano spesso imperfezioni, si basano su decisioni umane e coinvolgono più parti interessate con ambiti poco chiari, aumentando la complessità. La TC, catturando la sensibilità alle condizioni iniziali e i comportamenti emergenti, fornisce un quadro per analizzare queste sfide. I DT integrano diverse fonti di dati, mentre il retrofit e la manutenzione fungono da strumenti chiave per regolare i parametri del sistema.
Nel primo capitolo, l'obiettivo è identificare il quadro, i problemi e gli obiettivi unici, e fornire definizioni affrontando domande chiave, considerando l'ambiente costruito come un sistema complesso e dinamico.
Il secondo capitolo è dedicato alla revisione dei principi e delle applicazioni della TC, esplorando la sua rilevanza per i sistemi complessi e l'uso pratico. Esamina quindi la FM basata su DT considerando caratteristiche caotiche, dettagliando i suoi componenti, il quadro e il ruolo nella manutenzione, nel retrofit e nella gestione dei comportamenti caotici nei sistemi FM.
Il terzo capitolo dimostra i parametri del sistema e la loro evoluzione all'interno del modello FM. Utilizzando MATLAB, presenta sia i risultati delle simulazioni numeriche, analizza la dinamica del sistema e esplora come questi risultati possano essere applicati operativamente per migliorare le strategie di FM.
L'ultimo capitolo riassume i risultati chiave e le sfide, fornendo approfondimenti basati sui dati sulle opportunità di questo approccio basato sulla TC. Delinea le connessioni con altre discipline, le potenziali aree di ricerca supportate da esempi sia sulle difficoltà di implementazione che sulle possibilità future.Drawing inspiration from a well-known mathematical theory that was never holistically considered for the built environment and left for use in other engineering disciplines, this research investigates the Chaos Theory (CT) and its potential which remained overlooked in asset management. Facility Management (FM) is one of the most dynamic phases of an asset’s lifecycle, and with Digital Twin (DT) technology enhancing data collection, new opportunities arise to model FM dynamics using CT. FM systems interact with pre and post phases, involving numerous parameters that generate multiple system paths, making control and prediction challenging. Additionally, these processes often tolerate imperfections, rely on human-driven decisions, and involve multiple stakeholders with unclear scopes, adding complexity. CT, by capturing sensitivity to initial conditions and emergent behaviours, provides a framework to analyze these challenges. DT integrates diverse data sources while retrofitting and maintenance act as key tools for adjusting system parameters.
In the first chapter, the aim is to identify the framework, unique problems & objectives, and provide definitions by addressing key questions while considering the built environment as a complex and dynamic system.
The second chapter is for reviewing the principles and applications of CT, exploring its relevance to complex systems and practical use. It then examines DT-based FM considering chaotic features, detailing its components, framework, and role in maintenance, retrofitting, and managing chaotic behaviours in FM systems.
The third chapter demonstrates the system parameters and their evolution within the FM model. Using MATLAB, it presents numerical simulation results, analyzes the system’s dynamics, and explores how these findings can be applied operationally to improve FM strategies.
The last chapter summarizes key findings and challenges while providing data-driven insights into the opportunities of this CT-based approach. It outlines connections with other disciplines, and potential research areas supported by examples on both implementation difficulties and future possibilities
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
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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