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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

EpiViewer: An Epidemiological Application For Exploring Time Series Data

Thorve, Swapna 11 1900 (has links)
Visualization plays an important role in epidemic time series analysis and forecasting. Viewing time series data plotted on a graph can help researchers identify anomalies and unexpected trends that could be overlooked if the data were reviewed in tabular form. However,there are challenges in reviewing data sets from multiple data sources (data can be aggregated in different ways and measure different criteria which can make a direct comparison between time series difficult. In the face of an emerging epidemic, the ability to visualize time series from various sources and organizations and to reconcile these datasets based on different criteria could be key in developing accurate forecasts and identifying effective interventions. Many tools have been developed for visualizing temporal data; however, none yet supports all the functionality needed for easy collaborative visualization and analysis of epidemic data. In this thesis, we develop EpiViewer, a time series exploration dashboard where users can upload epidemiological time series data from a variety of sources and compare, organize, and track how data evolves as an epidemic progresses. EpiViewer provides an easy-to-use web interface for visualizing temporal datasets either as line charts or bar charts. The application provides enhanced features for visual analysis, such as hierarchical categorization, zooming, and filtering, to enable detailed inspection and comparison of multiple time series on a single canvas. Finally, EpiViewer provides a built-in statistical Epi-features module to help users interpret the epidemiological curves. / Master of Science / We present EpiViewer, a time series exploration dashboard where users can upload epidemiological time series data from a variety of sources and compare, organize, and track how data evolves as an epidemic progresses. EpiViewer is a single page web application that provides a framework for exploring, comparing, and organizing temporal datasets. It offers a variety of features for convenient filtering and analysis of epicurves based on meta-attribute tagging. EpiViewer also provides a platform for sharing data between groups for better comparison and analysis.
42

La syrinx dans la peinture et la mosaïque du IIe s. av. J.-C. au IVe s. ap. J.-C.

Boisjoly, Richard 07 February 2019 (has links)
La syrinx, flûte champêtre à multiples tuyaux, est surtout connue comme la "flûte de Pan", parce que Pan, ce dieu mi-homme, mi-chèvre, en serait le créateur. Cependant, chez d’autres auteurs anciens il y a des versions différentes. Mais c’est surtout à partir de mosaïques et de peintures comprises entre le IIè s. av. J.-C. et le IVè s. ap. J.-C. que nous prenons conscience que cette flûte est l’attribut d’autres personnages soit: les satyres, les putti, les bergers etc., ce qui a comme conséquence de changer le symbolisme de l’instrument. Nous constatons que la syrinx est spécifiquement rattachée au domaine champêtre comme nous le montrent non pas seulement nos peintures et nos mosaïques analysées, mais aussi d’autres types de support comparatif : sarcophage, statue, monnaie, textile, vase etc. Enfin, toujours à partir de nos monuments, une typologie a été dressée pour ressortir les différents modèles de syrinx, les plus importants et/ou les plus significatifs. / Montréal Trigonix inc. 2018
43

An investigation of the management and maintenance of an online subject directory with particular reference to the South African Literature Online resource

Rakoma, Pamela Portia Thembeka January 2004 (has links)
Thesis (M.Tech.: Library and Information Studies)-Durban Institute of Technology, 2004. viii, 71 leaves / The aim of the study was to investigate management and maintenance procedures that were used by other sites and how these could be used as a basis for formulating management and maintenance procedures for the SALO subject directory.
44

The structure of galaxies : the division of stellar mass by morphological type and structural component

Kelvin, Lee Steven January 2013 (has links)
The mechanisms which cause galaxies to form and evolve each leave behind distinct structural markers in their wake. Dynamically hot processes (e.g., monolithic collapse, hierarchical merging) give rise to pressure-supported spheroidal structures, including elliptical galaxies and classical bulges. By contrast, dynamically cold processes (e.g., gas accretion, AGN splashback) lead to flattened rotationally-supported disk-like structures, often found on their own or as part of a spiral galaxy. If left in isolation for a sufficient length of time, secular evolutionary processes cause the formation of a bar-like structure within the disk, precipitating the genesis of a rotationally-supported pseudo-bulge. Robustly measuring galaxy structure enables us to ascertain the relative importance of these competing evolutionary mechanisms and; in so doing, help broaden our understanding of how the Universe around us came to be. This thesis explores the relation between galaxy structure, morphology and stellar mass. In the first part I present single-Sérsic two-dimensional model fits to 167,600 galaxies modelled independently in the ugrizYJHK bandpasses using reprocessed Sloan Digital Sky Survey Data Release Seven (SDSS DR7) and UKIRT Infrared Deep Sky Survey Large Area Survey (UKIDSS LAS) imaging data available via the Galaxy and Mass Assembly (GAMA) data base. In order to facilitate this study, we developed Structural Investigation of Galaxies via Model Analysis (SIGMA): an automated wrapper around several contemporary astronomy software packages. We confirm that variations in global structural measurements with wavelength arise due to the effects of dust attenuation and stellar population/metallicity gradients within galaxies. In the second part of this thesis we establish a volume-limited sample of 3,845 galaxies in the local Universe and visually classify these galaxies according to their morphological Hubble type. We find that single-Sérsic photometry accurately reproduces the morphology luminosity functions predicted in the literature. We employ multi-component Sérsic profiling to provide bulge-disk decompositions for this sample, allowing for the luminosity and stellar mass to be divided between the key structural components: spheroids and disks. Grouping the stellar mass in these structures by the evolutionary mechanisms that formed them, we find that hot-mode collapse, merger or otherwise turbulent mechanisms account for ~46% of the total stellar mass budget, cold-mode gas accretion and splashback mechanisms account for ~48% of the total stellar mass budget and secular evolutionary processes for ~6.5% of the total stellar mass budget in the local (z<0.06) Universe.
45

Bornes dans un ensemble ordonné fini‎ : produit contracté, applications

Trehel, Michel 20 May 1972 (has links) (PDF)
.
46

Ecos tradicionais nos catálogos de heróis abatidos da Ilíada / Traditional echoes in the Iliadic catalogue of fallen heroes

Villa, Danilo de Sousa Tolentino 17 October 2018 (has links)
presente trabalho tem como objetivo compreender as cenas típicas de heróis caídos em sequência na Ilíada, tendo por base as revisões mais recentes da Teoria Oral cuja ênfase é na tradicionalidade dos poemas homéricos e em sua recepção. Em particular, cotejou-se a estrutura dessa cena típica com a dos catálogos épicos, seguindo a análise estabalecida pelo artigo seminal de Beye (1964). Um dos resultados mais influentes de seu artigo é a demonstração de que a estrutura do Catálogo das Naus e da cena típica dos heróis tombados é a mesma, razão pela qual costuma-se falar de um \"catálogo de mortos\" na Ilíada. Porém, uma discussão da noção de catálogo na poesia épica e se é realmente possível classificar todas as sequências de guerreiros derrotados como tal ainda não foi realizada. Para atingir esse objetivo, esta dissertação fez uso dos recentes desenvolvimentos da Teoria Oral, responsáveis por renovar a interpretação dos catálogos homéricos pelo viés da performance e da oralidade através de múltiplas abordagens. Assim, catálogos podem ser considerados grandes feitos de memória que causam admiração no público, ou como recursos que auxiliam o aedo no ato da composição, ou até mesmo como o princípio unificador de toda a poética homérica. Aplicou-se cada uma dessas abordagens com o objetivo de responder em que medida é possível falar de um catálogo de mortos na Ilíada. / The present work aims to understand the typical scene of multiple fallen heroes in the Iliad, having as its basis recent revisions of the Oral Theory whose enphasis is in the traditionality of the Homeric poems and its reception. Particularly, it contrasts the structure of this typical scene with the structure of the epic catalogue, following the analysis established by the seminal article of Beye (1964). One of the most influential results of his article was the demonstration that the structure of the Catalogue of Ships and the typical scene of fallen heroes is the same, which is the reason why it is common to speak of a \"catalogue of the dead\" in the Iliad. However, a discussion of what is a catalogue in epic poetry and if it\'s really possible to classify all the sequences of defeated heroes as such has not happened yet. Seeking to fufill that purpose, this dissertation uses more recent developments of the Oral Theory. They are responsible for renovating the interpretation of the Homeric catalogues by using multiple approaches that centers around performance and orality. A catalogue may be perceived as a great feat of memory that astonishes the audience, a tool that help the singer in the act of composition and even as the unifying principle of the Homeric poetics. Each one of this approaches were used with the objective of answering to what extent it is possible to talk about a catalogue of the dead in the Iliad.
47

Integrating Ad Hoc Electronic Product Catalogues Through Collaborative Maintenance of Semantic Consistency

Jingzhi, Guo, n/a January 2005 (has links)
Existing electronic markets are fragmented in the sense that each is an information island. The interoperation of product information between them is difficult especially in semantics communication. This prevents the formation of global electronic markets and the lowering distribution cost through market globalisation. The traditional and contemporary ap-proaches of product standardisation and ontology mediation could solve the problem only if all markets could adopt the same product standards, or mediation systems could mediate all heterogeneous standards and markets without semantic conflicts. However, problems generally exist in adopting a universal standard or mediating all markets through existing mediation systems. A reflection of the issue is that there are millions of ad hoc electronic product catalogues (EPCs) situated in small and medium sized enterprises (SMEs), where each EPC is a semantic community, often not aware of standards and mediation systems due to its ad hoc nature. This thesis focuses on the semantic integration of autonomous ad hoc EPCs, which are semantically inconsistent with each other. Firstly, a novel Collaborative Concept Exchange (CONEX) approach is developed for the se-mantic integration of ad hoc EPCs. Using this approach, a PRODUCT MAP is first built based on the theories of semiotic analysis and market segmentation. It functions as an analytical framework to articulate ad hoc EPCs, and answers the questions: what are the general char-acteristics of ad hoc EPCs, what are their heterogeneous relations, and how they are unevenly distributed in fragmented electronic markets. Within this framework, an abstract representa-tion of ad hoc EPCs is proposed using the articulated elements that are simple and manipu-lable. Major contributions of this framework include: the models of the abstract representa-tion of ad hoc EPCs on their structures, concepts and contexts; the semantic integration conditions of heterogeneous ad hoc EPCs; and a ConexNet of market network topology that captures the characteristics of ad hoc EPCs that are unevenly distributed in fragmented elec-tronic markets. Secondly, a three-layer CONEX information model is proposed to integrate ad hoc EPCs based on the PRODUCT MAP, which provides a trichotomy of systems, designers and users. The strategy behind the model is the separation of structure from concept and context, and hence they can be independently managed to resolve semantic conflicts between ad hoc EPCs. The major contributions of this model include the CONEX framework, collaboration mechanism and context transformation. The CONEX framework presents a formal characteri-sation and reconstruction of the structures of ad hoc EPCs based on a CONEX structure model and a CONEX grammar. It provides a formal specification for representing ad hoc EPCs including concept structure, classifier structure and mapping structure. The semantic conflicts in designing the concepts of ad hoc EPCs are resolved by a collaboration mecha-nism based on a semantic consistency model. The collaboration mechanism includes three key procedures: replicating unique concept identifiers and translating concept definitions be-tween common concepts of common EPCs; localising common concepts to local EPCs; and globalising local concepts to common EPCs. Users in the CONEX information model are not involved in any integration activities. They are provided with automatic and accurate concept exchange services through a mechanism of context transformation, which is designed based on an algorithm called Heterogeneous Concept Transformation. The separate integration of structures, concepts and contexts of ad hoc EPCs guarantees that the requirements of flexi-bility, evolvability and exactness of semantic integration have been met. Thirdly, the feasibility and features of the Collaborative Concept Exchange approach have been demonstrated in a prototype implementation that provides the services of collaborative concept design for semantic conflict resolution, and heterogeneous concept transformation for accurate and automatic concept exchange between ad hoc EPCs. A key contribution in the implementation level is the independent representation of the CONEX framework called XML PRODUCT MAP (XPM). XPM provides a feature of platform independence by con-forming to the standards of W3C XML, Simple Object Access Protocol and Web Services Description Language in both document specification and document transport. It is also a demonstration that the generic CONEX structure model and CONEX grammar can be imple-mented in any specific language such as XML for the particular scenarios of semantic integra-tion. With the aid of a collection of XPM document templates, two components called Con-cept Collaborator and Concept Transformer of the CONEX prototype are implemented to demonstrate how concepts are collaboratively designed to resolve semantic conflicts and how concepts are automatically and accurately exchanged between autonomous, heterogeneous and distributed ad hoc EPCs.
48

Users and an online catalogue : an evaluation of the OPAC at the Dixson Library, University of New England

Barret, Beverley, n/a January 1989 (has links)
This thesis reports on a study undertaken at the Dixson Library, University of New England. The purpose of the study was to develop an understanding of users of online public access catalogues (OPACs). The understanding gained from the study will assist in the development of improvements to the Library's OPAC, and increase user ability to access information from the OPAC. The study replicated the user questionnaire of the Online Patron Access Project, sponsored by the Council on Library Resources (CLR) in 1981/83. The questionnaire was modified slightly to suit conditions at the Dixson Library. The study addressed nine research questions relating to the users, their reactions, attitudes, experiences and problems. The user task and their suggestions for improvement were also addressed. The study formally tested three propositions between the variables user task, success and attitudes in relation to OPAC users. The findings show the analysis of the responses for the population as a whole, and, where relevant, for eight groups of student respondents based on their academic affiliation. The student population was of particular importance because of the preponderance of external students at the University of New England. The differences in the findings between the groups of students were discussed, and where possible, explained. The three formal propositions were tested by carrying out Chi square tests for the values of each variable. Nine significant relationships were found. Comparisons were made between the Dixson Library findings and those of the CLR study. Recommendations and conclusions were drawn from the study, including areas for further research.
49

Projet de catalogue collectif virtuel accessible par le client Z39.50 du SCD de l'Université Lyon 3

Guilleray, Pierre Emmanuel January 2003 (has links) (PDF)
Mémoire d'étude diplôme de conservateur des bibliothèques : Bibliothéconomie : Villeurbanne, ENSSIB : 2003.
50

L'avenir des catalogues formats, données, outils, usages /

Wenz, Romain Lupovici, Christian. January 2009 (has links)
Mémoire d'étude diplôme de conservateur des bibliothèques : bibliothéconomie : Villeurbanne, ENSSIB : 2009. / Texte intégral. Résumé en français et en anglais. Bibliogr. f. 93-102.

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