University, Diss., 2002--Kiel.

Thesis (Ed.D.)--University of West Florida, 2007. / Title from title page of source document. Document formatted into pages; contains 151 pages. Includes bibliographical references.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 128-139). Also available on the Internet.

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (p. 140-150).

Στόχος της παρούσας διπλωματικής εργασίας είναι να γίνει μια μελέτη πάνω στο υπάρχον λογισμικό για τη δημιουργία και υποστήριξη ερωτηματολογίων στον Παγκόσμιο Ιστό. Θα μελετηθούν οι δυνατότητες που προσφέρουν τα διαδικτυακά ερωτηματολόγια όπως επίσης και οι περιορισμοί τους και θα παρουσιαστούν τα κριτήρια που μπορούν να βοηθήσουν έναν ερευνητή να επιλέξει το κατάλληλο για την έρευνά του εργαλείο ανάπτυξης και υποστήριξης online ερωτηματολογίων. Στη συνέχεια θα γίνει μια παρουσίαση κάποιων open source εργαλείων δημιουργίας και υποστήριξης διαδικτυακών ερωτηματολογίων και θα γίνει μία σύγκριση μεταξύ αυτών. Θα παρουσιαστεί μια πιλοτική εφαρμογή, χρησιμοποιώντας το επιλεγμένο ως ισχυρότερο open source εργαλείο από τα παραπάνω και κατά τη δημιουργία του ερωτηματολογίου θα γίνει και παρουσίαση του συγκεκριμένου εργαλείου. / The aim of this paper is to examine the existant software for online surveys.The benefits of the web-based surveys will be examined as well as their limitations and the criteria for choosing the appropriate tool for each research are going to be presented. There will also be presented some open source tools for online surveys and following that, these tools are going to be compared with each other. At the end of this paper with the chosen as the most powerful tool of the above, a survey is going to be created and at the same time the characteristics of this software will be demonstrated.

Η αλματώδης ανάπτυξη του Παγκόσμιου Ιστού και των εφαρμογών του καθιστούν απαραίτητη τη συζήτηση για την ασφάλεια πληροφοριών στα πλαίσιά του. Στην εργασία αυτή παρουσιάζονται τα δομικά κομμάτια που υλοποιούν τον Παγκόσμιο Ιστό, η υποδομή του Διαδικτύου, το περιβάλλον του χρήστη και το περιβάλλον των εξυπηρετητών Ιστού (web browsers). Κάθε ένα από αυτά τα μέρη έχει τις δικές του ευπάθειες ασφάλειας και τις μεθόδους αντιμετώπισης κάθε μιας. Παρουσιάζονται οι κυριότερες απειλές ανά δομικό στοιχείο του Ιστού και κάποιες τεχνικές προφύλαξης από αυτές. Κυρίαρχο ρόλο στις τεχνικές αντιμετώπισης επιθέσεων στον Παγκόσμιο Ιστό παίζουν ο ορθός σχεδιασμός, η ενίσχυση της ασφάλειας των εμπλεκόμενων πρωτοκόλλων, οι τεχνικές κρυπτογράφισης αλλά και η προσωπική ευθύνη κάθε χρήστη του Ιστού. / Rapid growth of World Wide Web leads to a continuous discussion on maintaining information security through it. This essay presents the parts which implement World Wide Web, thus Internet structure, end user environment and web server environment. Each of these parts has different security vulnerabilities and measures of their mitigation. The most important security threats along with mitigation techniques are described. Almost all mitigation techniques come down to use of proper application design, cryptography and personal responsibility of every use and administrator.

Education for Sustainable Living (ESL) requires a whole-system pedagogical shift that changes the discourse from a positivistic worldview into one founded on ecological principles. The emerging environmental and sociopolitical challenges of the 21st century are complex, and schools present an important platform embracing sustainable changes. This participatory action research surveyed staff attitudes and student values from one Manitoban urban high school, to better understand the school culture of sustainability. In addition, a school wide Equity Conference was profiled for contributions to ESL through student exit slips; and a focus group with teachers where survey data was discussed also became part of the data corpus. The intent of this research was to understand on a deeper level how sustainability projects and initiatives are related to a culture of sustainability school wide. From these findings, recommendations to improve a whole-school approach to sustainability are provided. / February 2016

Thesis (MPhil)--University of Stennbosch, 2001.Thesis / ENGLISH ABSTRACT: The Internet connects millions of computers and people from all over the world with each other. A few clicks with a mouse are usually enough to gain access to the computers of almost any university in the world. But it is not only professors and researchers with years of experience who publish on the Internet. Anyone can publish anything for any reason without any editing or verification of the content. The Web is a valuable source of the information needed by science journalists to confirm facts of stories or to gain background information on a subject - if they know that the information is reliable. This web site identifies and discusses criteria to help establish the credibility of a web site. The Internet consists of far more than just the World Wide Web. The World Wide Web is, however, the most talked-about and bestknown part of the Internet, and the criteria discussed on this web site are applicable to the World Wide Web alone. With a little common sense and the necessary adaptations they can, however, be used to determine the credibility of information found on other parts of the Internet. Science journalists, students using the Web for research, and any other Web surfer will benefit from reading this document. Anybody can publish on the Web. Is there a set of rules that can be applied to a web site to measure its credibility? What are these rules? o FjrsUI1~ssion1i Is the layout professional? Is the site user friendly? Is the style appropriate for the type of information? Is the document free of spelling mistakes and grammatical errors? Does it take too long to load? o The_Contel1!Are there flaws in the logic used? Is the writer biased? Is there any verification for this information? Is the information accurate and complete? o A~ When was the web page published? Are there many broken links? o Sourc(?.<,)f theJnt'oxmation Who is the author? Who is the publisher? What do others have to say about this web site? o P1!!]2_O~e/Targ~_lAudiel1W~~ho is the target audience? What does the user want from the web site? What is the purpose of the web site? Who gains what? A summary of the criteria in tabular form is available here. The criteria discussed on this web site are only guidelines. Some criteria are more important than others. The situation will determine the relevance of each of the criteria. The origin of the information, the purpose thereof and the logic used are usually the most important criteria. The most important rule, however, is the use of common sense. Examine more than one source and compare them with one another. An intelligent decision regarding the credibility of the information can only be made when all (or most) sides ofa matter have been examined. / AFRIKAANSE OPSOMMING: Die Internet verbind miljoene rekenaars en mense regoor die aarde met mekaar. Net 'n paar klieke van 'n muis kan toegang verskaftot die rekenaars van amper enige universiteit in die wêreld. Dit is egter nie net professors en navorsers met jare se ervaring in hul veld wat hul bevindinge op die Wêreldwye Web publiseer nie. Enige-iemand kan enige-iets om enige rede publiseer sonder dat dit deur enige-iemand gelees of goedgekeur hoef te word. Die Web is 'n waardevolle bron van die tipe inligting wat wetenskap-joernaliste nodig het om die feite van hul stories te bevestig, of om agtergrondinligting oor 'n onderwerp in te samel - mits hulle seker is dat die inligting vertrou kan word. Hierdie webwerf identifiseer en bespreek verskillende kriteria wat kan help om die gehalte van die inhoud van 'n webwerfte bepaal. Die Wêreldwye Web is die bekendste deel van die Internet. Die riglyne is van toepassing op die Web alleen, maar kan met aanpassings ook op die ander dele van die Web gebruik word. Wetenskapjoernaliste, studente wat die Web gebruik vir navorsing, en enige webgebruiker sal baat vind by hierdie webwerf. Te veel mense kan publiseer. Is daar 'n stel reëls waarvolgens 'n webwerf gemeet kan word wat sal verseker dat die inhoud akkuraat en betroubaar is? Wat is daardie reëls? By die ondersoek na die gehalte van die inhoud van 'n webwerf, kan die volgende in gedagte gehou word: o Eerst_ell1ilnlkke Is die uitleg professioneel? Is die werf gebruikersvriendelik? Pas die skryfstyl by die tipe inligting? Is die dokument vol spel- en taalfoute? Laai die dokument vinnig af? o (_J~loof\yaarciigl1Yidyangi_eJnhQlIC!Is die logika wat gebruik word, logies? Is die skrywer objektief? Is daar enige ondersteuning vir hierdie inligting? Is die inligting akkuraat en volledig? o Ouci~Jd9n}Wanneer is die webbladsy gepubliseer? Is dit vol gebreekte skakels? o Qie o_QGiPJ:Qllg_Ygji1e1i1llligting Wie is die skrywer? Wie is die uitgewer of instansie? Wat het ander oor die webwerf te sê? o Q()elL(_J~h()()I Wie is die teikengehoor? Wat is die gebruiker se doel daarmee? Wat is die webwerf se doel? Waar lê die geld? 'n Opsomming van die kriteria in tabelvorm is hLer beskikbaar Die kriteria wat op hierdie webwerf bespreek word, is slegs riglyne. Sommige kriteria is belangriker as ander. Waardie inligting vandaan kom, wie verantwoordelik is daarvoor en wat die doel is daarmee is dalk die belangrikste vrae. Die belangrikheid van die ouderdom van die inligting hang van die tipe inligting wat ondersoek word, af. Die belangrikste reël by die beoordeling van 'n webwerf blyegter gesonde verstand. Meer as een bron moet ondersoek en met mekaar vergelyk word. Eers as alle (of genoeg) kante van 'n saak ondersoek word, kan 'n ingeligte besluit oor die akkuraatheid van inligting geneem word.

Este trabalho descreve a produção e a caracterização de redes de período longo (LPG) e redes de Bragg corroídas como elemento sensor. Tanto a produção quanto às caracterizações das redes de período longo foram realizadas no Laboratório de Laser da UTFPR e a produção e caracterização das redes de Bragg corroídas foram realizadas no Laboratório de Óptica Coerente da Universidade de Aveiro, Portugal. São abordados aspectos referentes aos princípios de produção e funcionamento do dispositivo. São apresentados os resultados obtidos na produção e na caracterização das redes, bem como os sistemas experimentais desenvolvidos para estes fins. O método empregado para a escrita das redes de período longo foi o da aplicação ponto-a-ponto de um arco elétrico, sendo produzidas redes com períodos de 598 e 600 μm operando na terceira janela de transmissão em torno de 1,55 μm. As redes de período longo e as redes de Bragg corroídas foram caracterizadas quanto as suas sensibilidades ao índice de refração, temperatura e deformações longitudinais (esta última caracterização foi realizada apenas para as redes de período longo), assim com a sensibilidade cruzada a estes parâmetros. A resposta das redes de período longo em função da variação do índice de refração do meio externo em duas diferentes situações, uma na presença de gasolina em ambiente hídrico e outra na presença de vapores de hidrocarbonetos ambiente atmosférico, indica a possibilidade da utilização deste dispositivo na detecção de vazamentos de hidrocarbonetos em refinarias ou postos de abastecimentos. Estas redes também foram caracterizadas para monitorar a concentração de cromo (III e VI) em soluções aquosas, os resultados indicam a possibilidades de monitorar em tempo real os processos de tratamento destes produtos, e assim otimizar este processo. As redes de Bragg foram utilizadas para a caracterização de propriedades ópticas de materiais, o resultado obtido para o etanol mostrou boa concordância com os valores apresentados na literatura, indicando que esta é uma técnica adequada para este fim. / This work describes the production and characterization of long period gratings (LPG) and etched fiber Bragg gratings as sensors. Both the production and characterization were carried out at the Laser Laboratory of UTFPR and the production and characterization of etched fiber Bragg gratings were carried out at Coherent Optics Laboratory of University of Aveiro, Portugal. Aspects concerning to the production and operation principles are shown. The results obtained from the grating production and characterization, as well as the experimental set-up developed to these goals are presented. The method used to write the gratings was the application of point-to-point electrical arch discharge, resulting in grating periods of 598 and 600 μm operating at the third window transmission around 1.55 μm. The long period gratings and the etched fiber Bragg gratings were characterized as a function of modification on the refractive index of the external surrounding environment, of temperature changes and strain (this last parameter was carried out only for long period gratings), the cross sensitivity also was characterized. The refractive index response of long period grating at two different conditions, one of them for presence of gasoline blend in water environment and another one for vapors of some hydrocarbon in closed container, points to the use of this device for hydrocarbon leakage detection at refineries and gas stations. Long period gratings e results obtained for ethanol agrees with the data find in literature, showing that this is a good technique for this goal.

Nontyphoidal Salmonella (NTS) causes invasive, and frequently fatal, disease in African children. The burden of disease secondary to NTS reflects inadequacy of Salmonella-control strategies in Africa, with expanding antibiotic resistance, and no licensed anti-NTS vaccine. The delivery of improved interventions to prevent, diagnose, and treat invasive NTS (iNTS) infection, will be facilitated by an improved understanding of the biological determinants of susceptibility to iNTS, including host genetic factors. To identify host genetic determinants of iNTS disease, we performed a GWAS and replication analysis of NTS bacteraemia in African children. This analysis identified and validated a common genetic variant in STAT4 associated with increased iNTS risk. To characterise the function of the NTS-associated STAT4 variant, we utilised a genotype-selectable bioresource of healthy European adults and samples from African children with iNTS disease. In these experiments, the risk genotype at STAT4 is associated with reduced STAT4 RNA expression in stimulated leukocytes, and reduced IFN&gamma; production in both ex vivo stimulated natural killer cells and in the serum of African children with acute NTS bacteraemia. To validate genetic variation suggestively associated with NTS bacteraemia in the GWAS, NTS-associated loci with evidence of regulatory function were prioritised for functional characterisation. Using in vitro models of intracellular Salmonella infection and RNA interference, I characterise the role of a candidate NTS-susceptibility determinant, EVI5L, in Salmonella infections. Finally, applying a pathway enrichment analysis to the NTS bacteraemia GWAS demonstrated that NTS-associated genetic variation in African children is enriched for methionine salvage enzymes. I further investigate the potential for host-pathogen interaction in this pathway, generating and characterising Salmonella mutants deficient in methionine metabolism. Taken together, these data represent the first unbiased assessment of genetic susceptibility to iNTS disease in unselected populations. These results have important implications for the design of Salmonella-control strategies for use in Africa.