Teaching through specifically designed and produced learning materials is a widely used and accepted way of teaching in higher education both nationally and internationally. Although this kind of teaching is used mainly in the field of distance education, it has become increasingly popular at traditional universities in face-to-face methods of education. Developing language-learning materials that meets the needs of English for Specific Purposes learners is a process that requires meticulous planning as English for Specific Purposes courses are aimed at meeting the career needs of the learners. An empirical study was conducted to determine the perceptions and concerns of learners using the ENGL 122 study guide at the North-West University (Potchefstroom Campus). The results of the study indicated that the learners were positive that the study guide enhanced their learning process, but various concerns were also raised by the learners. This study also aimed to create a framework for the writing of English for Specific Purposes (ESP) study guides. In order to achieve this, a literature study was done to provide information about the relevant theories and principles that apply to ESP study guide development. The literature study also included aspects that need to be taken into consideration when designing or planning the development of an ESP study guide. / Thesis (Ph.D. (English))--North-West University, Potchefstroom Campus, 2007.

L'objectif de ces travaux est le développement en technologie intégrée standard d'une topologiede ligne de propagation optimisée en termes de pertes, d'encombrement et de facteur de qualitéaux fréquences millimétriques. Cette topologie nommée S-CPW (Shielded CoPlanarWaveguide) utilise le phénomène d'ondes lentes afin de miniaturiser longitudinalement la ligned'un facteur compris entre 1,3 et 3,2 par rapport à des topologies classiques. Disposantégalement de faibles pertes, les lignes développées présentent un facteur de qualité élevé parfoissupérieur à 40, à 60 GHz. A partir de l'étude du champ électromagnétique dans la structure, unmodèle électrique a été développé. C'est le premier modèle dans la littérature prenant en compteles pertes dans ce type de guide d'onde. Plusieurs dispositifs passifs intégrés réalisés avec deslignes S-CPW dans différentes technologies CMOS ont été caractérisés jusqu'à 110GHz. Lacompacité et les faibles pertes d'insertion obtenues pour la mesure de filtres à stubs et dediviseurs de puissance permettent de réussir l'intégration de circuits passifs compacts entechnologie microélectronique CMOS standard aux fréquences millimétriques.

Efficiency improvement in turbomachines is an important aspect in reducing the use of fossil-based fuel and thereby reducing carbon dioxide emissions in order to achieve a sustainable future. Gas turbines are mainly fossil-based turbomachines powering aviation and land-based power plants. In line with the present situation and the vision for the future, gas turbine engines will retain their central importance in coming decades. Though the world has made significant advancements in gas turbine technology development over past few decades, there are yet many design features remaining unexplored or worth further improvement. These features might have a great potential to increase efficiency. The high pressure turbine (HPT) stage is one of the most important elements of the engine where the increased efficiency has a significant influence on the overall efficiency as downstream losses are substantially affected by the prehistory. The overall objective of the thesis is to contribute to the development of gas turbine efficiency improvements in relation to the HPT stage.   Hence, this study has been incorporated into a research project that investigates leading edge contouring near endwall by fillet and external cooling on a nozzle guide vane with a common goal to contribute to the development of the HPT stage. In the search for HPT stage efficiency gains, leading edge contouring near the endwall is one of the methods found in the published literature that showed a potential to increase the efficiency by decreasing the amount of secondary losses. However, more attention is necessary regarding the realistic use of the leading edge fillet. On the other hand, external cooling has a significant influence on the HPT stage efficiency and more attention is needed regarding the aerodynamic implication of the external cooling. Therefore, the aerodynamic influence of a leading edge fillet and external cooling, here film cooling at profile and endwall as well as TE cooling, on losses and flow field have been investigated in the present work. The keystone of this research project has been an experimental investigation of a modern nozzle guide vane using a transonic annular sector cascade. Detailed investigations of the annular sector cascade have been presented using a geometric replica of a three dimensional gas turbine nozzle guide vane. Results from this investigation have led to a number of new important findings and also confirmed some conclusions established in previous investigations to enhance the understanding of complex turbine flows and associated losses.   The experimental investigations of the leading edge contouring by fillet indicate a unique outcome which is that the leading edge fillet has no significant effect on the flow and secondary losses of the investigated nozzle guide vane. The reason why the leading edge fillet does not affect the losses is due to the use of a three-dimensional vane with an existing typical fillet over the full hub and tip profile. Findings also reveal that the complex secondary flow depends heavily on the incoming boundary layer. The investigation of the external cooling indicates that a coolant discharge leads to an increase of profile losses compared to the uncooled case. Discharges on the profile suction side and through the trailing edge slot are most prone to the increase in profile losses. Results also reveal that individual film cooling rows have a weak mutual effect. A superposition principle of these influences is followed in the midspan region. An important finding is that the discharge through the trailing edge leads to an increase in the exit flow angle in line with an increase of losses and a mixture mass flow. Results also indicate that secondary losses can be reduced by the influence of the coolant discharge. In general, the exit flow angle increases considerably in the secondary flow zone compared to the midspan zone in all cases. Regarding the cooling influence, the distinct change in exit flow angle in the area of secondary flows is not noticeable at any cooling configuration compared to the uncooled case. This interesting zone requires an additional, accurate study. The investigation of a cooled vane, using a tracer gas carbon dioxide (CO2), reveals that the upstream platform film coolant is concentrated along the suction surfaces and does not reach the pressure side of the hub surface, leaving it less protected from the hot gas. This indicates a strong interaction of the secondary flow and cooling showing that the influence of the secondary flow cannot be easily influenced.   The overall outcome enhances the understanding of complex turbine flows, loss behaviour of cooled blade, secondary flow and interaction of cooling and secondary flow and provides recommendations to the turbine designers regarding the leading edge contouring and external cooling. Additionally, this study has provided to a number of new significant results and a vast amount of data, especially on profile and secondary losses and exit flow angles, which are believed to be helpful for the gas turbine community and for the validation of analytical and numerical calculations. / Ökad verkningsgrad i turbomaskiner är en viktig del i strävan att minska användningen av fossila bränslen och därmed minska växthuseffekten för att uppnå en hållbar framtid. Gasturbinen är huvudsakligen fossilbränslebaserad, och driver luftfart samt landbaserad kraftproduktion. Enligt rådande läge och framtidsutsikter bibehåller gasturbinen denna centrala roll under kommande decennier. Trots betydande framsteg inom gasturbinteknik under de senaste årtionden finns fortfarande många designaspekter kvar att utforska och vidareutveckla. Dessa designaspekter kan ha stor potential till ökad verkningsgrad. Högtrycksturbinsteget är en av de viktigaste delarna av gasturbinen, där verkningsgraden har betydande inverkan på den totala verkningsgraden eftersom förluster kraftigt påverkas av tidigare förlopp. Huvudsyftet med denna studie är att bidra till verkningsgradsförbättringar i högtrycksturbinsteget.   Studien är del i ett forskningsprojekt som undersöker ledskenans framkantskontur vid ändväggarna samt extern kylning, i jakten på dessa förbättringar. Den aerodynamiska inverkan av en förändrad geometri vid ledskenans ändväggar har i tidigare studier visat potential för ökad verkningsgrad genom minskade sekundärförluster. Ytterligare fokus krävs dock, med användning av en rimlig hålkälsradie. Samtidigt har extern kylning i form av filmkylning stor inverkan på verkningsgraden hos högtrycksturbinsteget och forskning behövs med fokus på den aerodynamiska inverkan. Av denna anledning studeras här inverkan både av ändrad hålkälsradie vid ledskenans framkant samt extern kylning i form av filmkylning av skovel, ändvägg och bakkant på aerodynamiska förluster och strömningsfält. Huvudpelaren i detta forskningsprojekt har varit en experimentell undersökning av en geometrisk replika av en modern tredimensionell gasturbinstator i en transonisk annulärkaskad. Detaljerade undersökningar i annulärkaskaden har gett betydande resultat, och bekräftat vissa tidigare studier. Detta har lett till ökad förståelsen för de komplexa flöden och förluster som karakteriserar gasturbiner.   De experimentella undersökningarna av förändrad framkantsgeometri leder till den unika slutsatsen att den modifierade hålkälsradien inte har någon betydande inverkan på strömningsfältet eller sekundärförluster av den undersökta ledskenan. Anledningen till att förändringen inte påverkar förlusterna är i detta fall den tredimensionella karaktären hos ledskenan med en redan existerande typisk framkantsgeometri. Undersökningarna visar också att de komplexa sekundärströmningarna är kraftigt beroende av det inkommande gränsskiktet. Undersökning av extern kylning visar att kylflödet leder till en ökad profilförlust. Kylflöde på sugsidan samt bakkanten har störst inverkan på profilförlusten. Resultaten visar också att individuella filmkylningsrader har liten påverkan sinsemellan och kan behandlas genom en superpositionsprincip längs mittsnittet. En viktig slutsats är att kylflöde vid bakkanten leder till ökad utloppsvinkel tillsammans med ökade förluster och massflöde. Resultat tuder på att sekundärströmning kan minskas genom ökad kylning. Generellt ökar utloppsvinkeln markant i den sekundära flödeszonen jämfört med mittsnittet för alla undersökta fall. Den kraftiga förändringen i utloppsvinkel är dock inte märkbar i den sekundära flödeszonen i något av kylfallen jämfört med de okylda referensfallet. Denna zon fordrar ytterligare studier. Spårgasundersökning av ledskenan med koldioxid (CO2) visar att plattformskylning uppströms ledskenan koncentreras till skovelns sugsida, och når inte trycksidan som därmed lämnas mer utsatt för het gas. Detta påvisar den kraftiga interaktionen mellan sekundärströmning och kylflöden, och att inverkan från sekundärströmningen ej enkelt kan påverkas. De generella resultaten från undersökningen ökar förståelsen av komplexa turbinflöden, förlustbeteenden för kylda ledskenor, interaktionen mellan sekundärströmning och kylflöden, och ger rekommendationer för turbinkonstruktörer kring förändrad framkantsgeometri i kombination med extern kylning. Dessutom har studien gett betydande resultat och en stor mängd data, särskilt rörande profil- och sekundärförluster och utloppsvinkel, vilket tros kunna vara till stor hjälp för gasturbinssamfundet vid validering av analytiska och numeriska beräkningar. / <p>QC 20140909</p> / Turbopower, Sector rig

G-Net system is being developed by the members of the G-Net research group under the supervision of Dr. K. Jay Bagga. The principle objective of the G-Net system is to provide an integrated tool for dealing with various aspects of graph theory. G-Net system is divided into two parts. GETS (Graph theory Experiments Tool Set) will provide a set of tools to experiment with graph theory, and HYGRES (HYpertext Graph theory Reference Service), the second subcomponent of the G-Net system to aid graph theory study and research. In this research a hypertext application is built to present the graph theory concepts, graph models and the algorithms. In other words, HYGRES (Guide Version) provides the hypertext facilities for organizing a graph theory database in a very natural and interactive way. An hypertext application development tool, called Guide, is used to implement this version of HYGRES. This project integrates the existing version of GETS so that it can also provide important services to HYGRES. The motivation behind this project is to study the initial criterion for developing a hypertext system, which can be used for future development of a stand alone version of the G-Net system. / Department of Computer Science

Complicated Grief is a relatively new concept that is globally debated by psychiatrists and psychologists. The time has come for social workers to join this debate and to develop and implement programmes to address the consequences following complicated grief, specifically which results in impaired social functioning. Complicated Grief, prolonged grief and traumatic grief are all synonyms. The term 'complicated grief is the preferred concept used in this research. Article 1 is a literature overview on factors leading to complicated grief and at the same time attempts to link these factors to the South African circumstances. South African citizens are not exempted from experiencing complicated grief. Cultural beliefs on death and dying, AIDS and cancer-related deaths, crime and sociopolitical deaths are but some of the risk factors. She furthermore highlights complicated grief as a matter to be assessed by social workers. The normality of grief is questioned when the grief experience prohibits the individual to regain a state of social functioning as close as possible to the pre-loss state. Complicated grief is regarded by many researchers as a specific condition in need of specific intervention. The efficacy of bereavement intervention in the case of normal grief is questioned, and it seems that individuals who experience complicated grief benefit more from bereavement intervention. Article 2 attempts to clarify the necessity to screen clients prior to including them in a complicated grief intervention programme by discussing the Inventory of Traumatic Grief as developed by Prigerson and colleagues. The researcher furthermore introduces the Grief Assessment Guide (GASsG) as an assessment tool during the screening process. In article 3 the researchers tabulate some of the most important models/approaches to bereavement and discuss its applicability to Complicated Grief. Specific attention is given to the Dual Process Model (Stroebe & Schut, 1999) and the task-centred approach (a social work approach to therapy) in an attempt to develop a model for Complicated Grief Intervention. This article furthermore proposes the Complicated Grief Intervention Model (CGIM) through the integration of the dual process model and the task-centred approach, while drawing on intervention techniques from other therapeutic approaches. Article 4 explains the implementation of the Complicated Grief Intervention Programme (CGIP) with the CGIM as framework for intervention. The researchers briefly discuss some of the intervention techniques, such as desensitization, visualization, client-log, miracle question, metaphors, rituals and humour. These techniques assist the social worker and the client towards achieving the goal. The CGIP is a time-limited interventions programme. It consists of, and is based on, the three steps of the CGIM: assessment, implementation and evaluation/termination. Although the CGIP has not been scientifically tested, it holds the potential to serve as a guided programme for social workers in the field of grief and bereavement. Article 5 is a discussion of the empirical findings of the research. This article describes the implementation of the proposed CGIP in the South African context. This article furthermore aims at evaluating the feasibility of implementing the CGIP rather than testing the effectiveness of the programme. Section C summarizes and evaluates the research and makes recommendations regarding its value and the value of possible future research on complicated grief in the South African context. / Thesis (Ph.D. (Social Work))--North-West University, Potchefstroom Campus, 2009.

Complicated Grief is a relatively new concept that is globally debated by psychiatrists and psychologists. The time has come for social workers to join this debate and to develop and implement programmes to address the consequences following complicated grief, specifically which results in impaired social functioning. Complicated Grief, prolonged grief and traumatic grief are all synonyms. The term 'complicated grief is the preferred concept used in this research. Article 1 is a literature overview on factors leading to complicated grief and at the same time attempts to link these factors to the South African circumstances. South African citizens are not exempted from experiencing complicated grief. Cultural beliefs on death and dying, AIDS and cancer-related deaths, crime and sociopolitical deaths are but some of the risk factors. She furthermore highlights complicated grief as a matter to be assessed by social workers. The normality of grief is questioned when the grief experience prohibits the individual to regain a state of social functioning as close as possible to the pre-loss state. Complicated grief is regarded by many researchers as a specific condition in need of specific intervention. The efficacy of bereavement intervention in the case of normal grief is questioned, and it seems that individuals who experience complicated grief benefit more from bereavement intervention. Article 2 attempts to clarify the necessity to screen clients prior to including them in a complicated grief intervention programme by discussing the Inventory of Traumatic Grief as developed by Prigerson and colleagues. The researcher furthermore introduces the Grief Assessment Guide (GASsG) as an assessment tool during the screening process. In article 3 the researchers tabulate some of the most important models/approaches to bereavement and discuss its applicability to Complicated Grief. Specific attention is given to the Dual Process Model (Stroebe & Schut, 1999) and the task-centred approach (a social work approach to therapy) in an attempt to develop a model for Complicated Grief Intervention. This article furthermore proposes the Complicated Grief Intervention Model (CGIM) through the integration of the dual process model and the task-centred approach, while drawing on intervention techniques from other therapeutic approaches. Article 4 explains the implementation of the Complicated Grief Intervention Programme (CGIP) with the CGIM as framework for intervention. The researchers briefly discuss some of the intervention techniques, such as desensitization, visualization, client-log, miracle question, metaphors, rituals and humour. These techniques assist the social worker and the client towards achieving the goal. The CGIP is a time-limited interventions programme. It consists of, and is based on, the three steps of the CGIM: assessment, implementation and evaluation/termination. Although the CGIP has not been scientifically tested, it holds the potential to serve as a guided programme for social workers in the field of grief and bereavement. Article 5 is a discussion of the empirical findings of the research. This article describes the implementation of the proposed CGIP in the South African context. This article furthermore aims at evaluating the feasibility of implementing the CGIP rather than testing the effectiveness of the programme. Section C summarizes and evaluates the research and makes recommendations regarding its value and the value of possible future research on complicated grief in the South African context. / Thesis (Ph.D. (Social Work))--North-West University, Potchefstroom Campus, 2009.

Thesis (M. En.)--Miami University, Institute of Environmental Sciences, 2004. / Title from first page of PDF document. Includes bibliographical references (p. 22-26).

Η παρούσα εργασία ασχολείται με τη μελέτη των τεχνολογιών ανάπτυξης εφαρμογών σε περιβάλλον φορητών συσκευών και συγκεκριμένα σε Windows Phone 7.5 (ή Mango) συσκευές. Ιδιαίτερα δόθηκε έμφαση στη δημιουργία πολυμεσικών εφαρμογών πολιτισμικού περιεχομένου, οι οποίες θα είναι όχι μόνο λειτουργικές αλλά θα διαθέτουν επίσης ένα φιλικό περιβάλλον διεπαφής έτσι ώστε να αποτελούν μια ευχάριστη εμπειρία για τον τελικό χρήστη. Με αφορμή αυτό το ερέθισμα, σχεδιάσαμε και αναπτύξαμε το Museum Guide – ένα ολοκληρωμένο περιβάλλον διαχείρισης περιεχομένου που έχει σαν στόχο την ξενάγηση σε ένα χώρο πολιτισμού, όπως για παράδειγμα ένα μουσείο, εκμεταλλευόμενο τις πολλές δυνατότητες που προσφέρει μια Windows Phone 7.5 συσκευή. Έτσι χρησιμοποιώντας το Museum Guide ο επισκέπτης του μουσείου μπορεί να βλέπει τα εκθέματα καθώς και συνοδευτικό υλικό που περιλαμβάνει κείμενο, εικόνες, αρχεία ήχου και βίντεο. Επιπλέον μπορεί να επιλέγει κάποια από αυτά τα εκθέματα ως αγαπημένα και να μοιράζεται τις εμπειρίες του με τα υπόλοιπα μέλη της ομάδας του μέσω άμεσων μηνυμάτων. Για τη λειτουργία των άμεσων μηνυμάτων δημιουργήσαμε έναν ενσωματωμένο messenger που λειτουργεί πάνω από xmpp πρωτόκολλο με τη βοήθεια της βιβλιοθήκης Matrix. Εκτός από τα παραπάνω, το Museum Guide δίνει τη δυνατότητα στον χρήστη να λάβει πληροφορίες για ένα συγκεκριμένο έκθεμα, βγάζοντας απλά μια φωτογραφία τού εν λόγω εκθέματος με την κάμερα του κινητού. Την λειτουργία αυτή την ονομάζουμε on-demand ξενάγηση και δόθηκε ιδιαίτερη έμφαση στον αλγόριθμο με βάση τον οποίο γίνεται η αναγνώριση της φωτογραφίας που βγάζει ο χρήστης. Για το σκοπό αυτό μελετήσαμε και αξιολογήσαμε διάφορους αλγορίθμους αναγνώρισης εικόνας και καταλήξαμε στη χρήση hashing τεχνικών με τη βοήθεια της βιβλιοθήκης pHash. / The current thesis is on study of application development technologies in portable devices environment and namely in Windows Phone 7.5 (or Mango) devices. Especially emphasis was placed on creation of multimedia applications with cultural content which will not only be functional but also have a friendly interface in order to be a pleasant experience for the end user. In response to this stimulus, we designed and developed the Museum Guide – an integrated content management environment which aims at guidance in an area of culture, for example a museum, exploiting the capabilities of a Windows Phone 7.5 device. Thereby the visitor of the museum can use the Museum Guide to see the exhibits as well as accompanying material including text, photos, audios and videos. Additionally the visitor can mark any of these exhibits as favorites and share their experiences with the other members of their group through instant messages. For the operation of instant messaging, we have created an embedded messenger which works over the xmpp protocol using the Matrix library. Besides the above, the Museum Guide gives to the user the opportunity to receive information about a specific exhibit, just taking a photo of this exhibit with phone’s camera. We call this operation on-demand guidance and we emphasized especially on the algorithm of user’s photo recognition. For this purpose we studied and evaluated various image recognition algorithms and came to the conclusion to use hashing techniques with help of pHash library.

The diploma thesis is called ?A travel book as a practical tool for teaching regional Geography in secondary school (for example teaching of South-western Asia).? It consists of two parts. The first part is focused on the analysis of literature and the materials that refer to the topic of my diploma thesis (textbooks of Geography, travelogue and popularly educational literature). The next theme of this thesis is a travel book as a term, and possibilities of the usage of literature connected with travelling as a tool of teaching practice in secondary school. The main part of the thesis applies to the process of teaching text as a teaching guide that uses elements of a travel book for teaching regional geography of states in South-western Asia in secondary school. The teaching text is divided into two parts ? travel and teaching that introduces basic geographic signs of the whole region of South-western Asia. Each chapter is finished with summary, questions and tasks. The readers are progressively taken to Iran as a chosen representative of the region in each part of travel story.

Le couplage de guides d'ondes nanoscopiques et d'atomes froids a récemment ouvert de nouvelles voies de recherche. Le guide d'onde dans notre cas est une nanofibre qui confine la lumière transversalement à une échelle inférieure à la longueur d'onde. La lumière guidée présente un fort champ évanescent permettant une interaction atome-photon exaltée au voisinage de la nanofibre. Dans notre expérience, un nuage atomique froid est d'abord superposé à une nanofibre optique. Puis, en utilisant un piège dipolaire via le champ évanescent de la nanofibre, les atomes froids sont piégés à proximité de sa surface. Avec cette plateforme, nous avons obtenu des épaisseurs optiques élevées OD ~ 100 et de longues durées de vie ~ 25 ms en utilisant un schéma de piégeage qui préserve les propriétés internes des atomes. Une direction intéressante est alors d'explorer les effets collectifs résultant de l'ordre spatial des atomes. Lorsque la période du réseau est proche de la longueur d'onde de résonance, une réflexion de Bragg aussi élevée que 75% est observée. Cette réflexion dépend de la polarisation de la sonde par rapport aux réseaux atomiques - une signature de la chiralité dans les systèmes à guide d'ondes nanoscopiques. La possibilité de contrôler le transport de photons dans les guides d'ondes couplés à des systèmes de spin permettrait de nouvelles fonctionnalités pour les réseaux quantiques et l'étude d'effets collectifs résultant d'interactions à longue distance. / The coupling of cold atoms to 1D nanoscale waveguides have opened new avenues of research. The waveguide in our case is a nanofiber, which confines light transversally to a subwavelength scale. The guided light exhibits a strong evanescent field allowing enhanced atom-photon interaction in the vicinity of nanofiber. In our experiment, a cold atomic cloud is first interfaced with an optical nanofiber. By using an optical lattice in the evanescent field, the atoms are then trapped in 1D atomic arrays close to the nanofiber. In this platform, we reach high optical depth OD ~ 100 and long lifetimes ~ 25 ms by using a dual-color compensated trapping scheme that preserves the internal properties of atoms. In this thesis, we explore collective effects emerging from the spatial ordering of atoms. When the period of the lattice is made close to commensurate with the resonant wavelength, Bragg reflection, as high as 75%, is observed. The reflection shows dependency on orientation of the probe polarization relative to the atomic arrays - a chiral signature in nanoscale waveguide-QED systems. The ability to control photon transport in 1D waveguides coupled to spin systems would enable novel quantum networking capabilities and the study of many-body effects arising from long-range interactions.