<p>The need for AAA protocols in the world are increasing and todays most common protocols RADIUS and TACACS+, cannot cope with the fast advances in fields benefiting from the use of AAA protocols. This is why IETF has developed the protocol Diameter as a next generations AAA protocol. The objective of this thesis is to account for the work conducted with Diameter as well as to determine if it is going to become the major AAA protocol of the next generation. In this thesis, I describe what Diameter is, its close integration with the Mobile IP protocol and its other uses. As Diameter is based on RADIUS an introduction to AAA and RADIUS is given in order to comprehend where we are today and where we are going as well as to why. I also compare today’s protocols (RADIUS, TACACS+, Kerberos and COPS) against the next generations AAA protocol Diameter. From this comparison, the Mobile IP integration capabilities and an analysis of the support of the Diameter protocol I have come to the conclusion that Diameter is going to become the major AAA protocol of the next generation.</p>

La prévision quantitative des précipitations à l'aide des modèles météorologiques reste encore un grand défi posé à la communauté des sciences atmosphériques. En effet, deux problèmes majeurs sont généralement identifiés pour la prévision opérationnelle des précipitations et du climat : les interactions des systèmes précipitants avec le relief et avec la pollution. Cette thèse contribue à l'amélioration des prévisions de pluies. La stratégie adoptée est d'étudier des évènements précipitants en zones montagneuses en décrivant au mieux les interactions aérosol-nuage-précipitation à l'aide du modèle à microphysique mixte détaillée : DEtailed SCAvenging Model (DESCAM, Flossmann et Wobrock (2010)). Ce modèle utilise cinq distributions pour représenter les particules d'aérosol résiduelles et interstitielles ainsi que les gouttes et cristaux de glace. Le modèle a directement été comparé aux observations réalisées au cours de la campagne expérimentale COPS (Convective and Orographically induced Precipitation Study), qui a eu lieu pendant l'été 2007 à la frontière franco-allemande. En particulier, les simulations des pluies ont été comparées avec des observations de différents radars afin d'évaluer les performances du modèle mais aussi d'aider à l'interprétation des réflectivités de la bande brillante. La sensibilité par rapport à la pollution particulaire a été étudiée pour les propriétés des nuages et des précipitations. Pour les cas étudiés, plus le nombre des particules d'aérosol présentes dans l'atmosphère est important et plus leur solubilité est élevée, plus les précipitations au sol sont faibles. Ces comportements globaux peuvent toutefois être localement différents. Il existe donc des interactions plus complexes entre les particules d'aérosol, les nuages et les précipitations qui doivent être encore plus approfondies.

The purpose of this study was to explore the evolution of collaborative practices of PLCs as they emerge when using technology based formative assessment via iFAIT or innovative Formative Assessment with Instruction and Technology developed by the researcher using audience response systems and the online data compiler, Eduphoria!. This study used sequential explanatory mixed methods to address the problems that schools face when implementing technology based formative assessments to improve instruction and student achievement. A survey administered in September 2012 and again in December 2012 provided a measure of teacher use of formative assessments, technology use in formative assessments, and perceptions of teachers using the PLC as a mechanism of support for technology based formative assessment. Training was facilitated by the researcher as PLCs worked together to develop, administer, and interpret formative assessments. Teacher interviews were conducted, and the study ended with the administration of the December 2012 survey and open-response questions for further qualitative analysis. Quantitative data analysis was completed using ANOVAs to determine if there were significant differences of teacher groups (subject taught, grade level taught, and years of teaching experience) use of iFAIT. This data analysis also included measures of frequency and paired sample t tests between the September and December 2012 responses. Qualitative data was analyzed using hand coding, word clouds, and WordSmith Tools. The triangulation of qualitative data in the quantitative data provided a narrative to document what collaborative factors affected the use of iFAIT. For school improvement and implementation of iFAIT, the study revealed that (1) with the right technology infrastructure, on-going professional development must be offered by administrators or sought after by teachers; (2) teachers must have strong beliefs in formative assessment and the technology that supports it; (3) open lines of communication must be supported through the PLC and administration; (4) teachers must see purpose in using revealing student data to drive instruction; and (5) PLCs must have common beliefs and believe that student achievement is connected to school improvement. PLCs should discuss data, share successes, and plan instruction through extended involvement in face-to-face and online venues as communities of practice.

The need for AAA protocols in the world are increasing and todays most common protocols RADIUS and TACACS+, cannot cope with the fast advances in fields benefiting from the use of AAA protocols. This is why IETF has developed the protocol Diameter as a next generations AAA protocol. The objective of this thesis is to account for the work conducted with Diameter as well as to determine if it is going to become the major AAA protocol of the next generation. In this thesis, I describe what Diameter is, its close integration with the Mobile IP protocol and its other uses. As Diameter is based on RADIUS an introduction to AAA and RADIUS is given in order to comprehend where we are today and where we are going as well as to why. I also compare today’s protocols (RADIUS, TACACS+, Kerberos and COPS) against the next generations AAA protocol Diameter. From this comparison, the Mobile IP integration capabilities and an analysis of the support of the Diameter protocol I have come to the conclusion that Diameter is going to become the major AAA protocol of the next generation.

Das in der Wirtschaftspraxis zunehmend häufig beobachtbare Phänomen der Koopetition, welches die Kooperation zwischen zueinander zugleich im Wettbewerb stehender Unternehmen beschreibt, ist aus wissenschaftlicher Perspektive empirisch und theoretisch weitgehend unzureichend erfasst. Diese Arbeit untersucht daher das strategische Management dieser auf den ersten Blick paradox erscheinenden koopetitiven Interorganisationsbeziehungen am fokalen Beispiel eines Unternehmens der zivilen Flugzeugtriebwerksindustrie, welches im Zuge der Erstellung kollektiver komplexer Produkte (CoPS) durch tiefgreifende Kooperationspartnerschaften eng mit seinen Wettbewerbern verbunden ist. Im Mittelpunkt der Analyse steht zum einen die Frage nach den spezifischen Gründen für das Auftreten und Eingehen von Koopetitionsbeziehungen, zum anderen die konkrete Ausgestaltung strategischen Handelns unter koopetitiven Verhältnissen und die Bewältigung des wettbewerblich-kooperativen Spannungsfelds durch die involvierten Unternehmen. Der bisherige geringe theoretische Kenntnisstand zum Untersuchungsphänomen bedingte ein gegenstandsangemessenes qualitatives Forschungsdesign auf methodologischer Basis der Grounded Theory. Als primäre Datenquelle wurden problemzentrierte Interviews mit Managern koopetitionsrelevanter Unternehmensbereiche geführt, aus denen unter Anwendung eines elaborierten Kodierprozesses empirisch fundierte Konzepte und Kategorien gebildet und in ihren kausalen Zusammenhängen abgebildet wurden. Auf diese Weise entstand eine substantive Theorie mittlerer Reichweite, die das Phänomen erstmalig in derartig empirischer Tiefe und theoretischer Dichte darstellt und dadurch einen wichtigen Beitrag auf dem Gebiet der Koopetitionsforschung leistet. Eine spiegelnde und integrierte Verknüpfung der empirischen Resultate mit dem aktuellen Stand der Forschung gewährleistet die diskursive Anschlussfähigkeit der gewonnenen Erkenntnisse an die Wissenschaftsgemeinschaft. Darüber hinaus eröffnet die Arbeit relevante handlungspraktische Ansätze für das strategische Management von Koopetition. (Autorenref.)

This study deals with the extent to which the South African education and training system reflects in principle, perception and practice, the ideal of an integrated national qualifications framework. It examines the uses and meaning of ‘integration’ through a number of lenses. These lenses include policy symbolism and a guiding philosophy for the emerging system; pragmatic and technical considerations; communities of practice; the complementarity of education and training; and curricular integration. In relation to the first two lenses, it is evident that an integrated framework is a powerful symbol of the break from a past system characterised by inequality, unfairness and deliberate mediocrity, to the extent that ‘integration’ has become the underpinning guiding philosophy for a new education and training system. However, such socio-political aspirations tend to place unreasonable demands on the system. The second set of lenses indicate that the ‘comprehensiveness’ of the system could work against the notion of integration, and in South Africa, has led to acute paralysis of the system. The strongest evidence of integration emerges from the last set of lenses namely, the grounded, meaningful practice through principled partnerships, as reflected in the development of sub-frameworks and communities of practice and the necessary collaboration needed for curricular integration and education and training delivery. Thus, it seems, to make integration meaningful, the persuasive logic of innovative, grounded practice, could be enabled and facilitated by less, not more, regulation and could be enhanced by structures that reflect the grounded practice. Copyright 2006, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. Please cite as follows: Blom, JP 2006, The ideal of an integrated national qualifications framework, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-06192007-123414 / > / Thesis (PhD (Education Management and Policy Studies))--University of Pretoria, 2007. / Education Management and Policy Studies / unrestricted

After years of proposals for a Loss and Damage fund meant to deliver climate justice for developing states being blocked, such a fund was established at the 27th Conference of the Parties (COP) in Sharm el-Sheikh, Egypt on November 20, 2022. Based on constructivist theories of norm diffusion and persuasion, complemented by theories on strategic negotiating and normative discussions of justice, this thesis conducts a directed content analysis to examine the discourses used by the Alliance of Small Island States (AOSIS) and the EU in negotiations for the Loss and Damage fund. The results show that AOSIS has shifted from using multiple discourses to mainly justice-based arguments sometimes used strategically and was aided by a process favorable to discussing Loss and Damage at COP27. The EU, which represents itself as a leader in COPs, opposed creating new mechanisms to address loss and damage until COP27. Afterward, it positioned itself as an important contributor to the outcome. To evaluate the outcome, while the fund is aimed at distributive justice and climate justice is recognized in the COP27 text, justice discourse is absent from the Loss and Damage section. It remains to be seen whether the fund will advance climate justice.

Οι οικονομικές και τεχνολογικές εξελίξεις των τελευταίων ετών, η απελευθέρωση της αγοράς, οι ισχυρές κατά απαίτηση πολυμεσικές υπηρεσίες καθώς και ο αυξημένος αριθμός χρηστών των κινητών δικτύων υποδεικνύουν την αναγκαιότητα της σύγκλισης των δύο δικτυακών τεχνολογιών (κινητή τηλεφωνία και internet) με στόχο την παροχή υπηρεσιών Internet στο περιβάλλον των κινητών επικοινωνιών. Η παραπάνω απαίτηση οδήγησε στην δημιουργία του δικτύου επόμενης γενιάς NGN. Η διπλωματική αυτή εργασία ασχολείται με την μελέτη της αρχιτεκτονικής του επιπέδου υπηρεσιών και την υποστήριξη Ποιότητας Υπηρεσίας (QoS) σε δίκτυα Νέας Γενιάς. Συγκεκριμένα δίνεται έμφαση στις λειτουργίες ελέγχου, σηματοδοσίας και λειτουργιών αρχιτεκτονικής του QoS σε επίπεδο υπηρεσιών. Αρχικά, ορίζουμε την έννοια “QoS” όσον αφορά την οπτική του δικτύου και το χρήστη. Περιγράφονται η αρχιτεκτονική του στρώματος υπηρεσιών του δικτύου καθώς και οι λειτουργίες ελέγχου πόρου και αποδοχής των κλήσεων, που αποτελούν σημαντικό μέρος της αρχιτεκτονικής του NGN. Στη συνέχεια παρουσιάζονται αρχιτεκτονικές που προορίζονται για την παροχή του QoS (IntServ, DiffServ), στη Συμφωνία Στάθμης Παρεχόμενης Υπηρεσίας (SLA), το πρωτόκολλο σηματοδοσίας COPS. Επίσης, δίνουμε έμφαση σε ορισμένες πτυχές (χρονοδρομολόγηση, διαχείριση ουρών) μίας QoS αρχιτεκτονικής, οι οποίες είναι ζωτικής σημασίας όσον αφορά την αποδοτική παροχή Ποιότητας Υπηρεσίας. Στη συνέχεια, με τη χρήση του εργαλείου προσομοίωσης OPNET, διεξάγουμε μια σειρά προσομοιώσεων σε ένα ATM και σε ένα NGN δίκτυο. Τέλος, παραθέτουμε και αναλύουμε τα αποτελέσματα των προαναφερθέντων πειραμάτων. / The concept of an NGN (Next Generation Network) has been introduced to take into consideration the new realities in the telecommunications industry, characterized by factors such as: competition among operators due to ongoing deregulation of markets, explosion of digital traffic, e.g.,increasing use of "the Internet", increasing demand for new multimedia services, increasing demand for a general mobility, convergence of networks and services, etc. This thesis has as subject the architecture of service stratum and presents an overview of standards functions defining the Quality of Service (QoS) in Next Generation Networks (NGNs). Several standards bodies define the QoS control architectures based on their scope of work. Specifically, emphasis is given to control functions, signalling and functional architecture of QoS in service stratum. Firstly, we define the meaning of QoS according to the view of the operator’s network and terminal users. The functional architecture of service stratum and especially the part of resource and admission control functions are described in the main body. Furthermore, architectures as IntServ and DiffServ, SLAs and COPS protocol are used as providers of the QoS. Scheduling and queuing management are necessary to optimize the QoS in NGN networks. In this project, we use OPNET simulator in two scenarios to determine construct and control ATM and NGN networks. Finally, collect the results of the experiments and analyze them.

Governments around the world have pursued ICT based initiatives including the provision of infrastructure to assist regional areas to develop economically (Beckinsale et al. 2006). There has been considerable interest in exploiting ICT to develop high technology clusters and support innovative networks (Lawson & Lorenz 1999). However, these initiatives have met with mixed success. It is clear that such development depends on more than providing appropriate technology Attention to social and organisational factors is crucial if regional areas are to realise the potential of ICT as a tool for regional development (Gengatharen & Standing 2005). It is important to understand the nature of business networking as well as the perspective of those participating in such networks if successful initiatives are to be established. The aim of this research is to identify how ICT can be used for knowledge sharing among businesses in regional areas and how the online networks through which knowledge is shared can contribute to the development of the region. This research investigates the question of what value small businesses in those regions derive from knowledge sharing networks using ICT. It also seeks to identify the value creation potential of those networks for their region. Previous research has shown that large organisations have achieved significant value from virtual communities of practice (VCoPs) as a structure for sharing knowledge and supporting innovation (Wenger 2004). The concept of Communities of Practice and Virtual Communities of Practice provided a useful point of departure for this research. The investigation comprised interpretive case studies of two Australian regional areas and their local business networks which incorporated SMEs in a variety of industries. Each case study was conducted in three stages. First, semi-structured interviews were conducted with regional economic development leaders. Second, 192 small and medium business owners were surveyed about their business activities and their participation in local business networks. Third, in-depth interviews were conducted with 23 small business owners to gain a richer understanding of their participation in knowledge-sharing networks and the value they realised or anticipated from various knowledge-sharing activities. A combined analysis of the two cases was conducted as well as the individual analyses. The research adopted a modified Structured Case method (Carroll & Swatman 2000). The analysis of the two case studies revealed: a.) There was a significant difference between the majority of SMEs who traded within the region and those trading largely beyond the region. The latter’s more proactive online sharing knowledge and seeking of business opportunities would enable them to access most value from VCoEs. b.) The participating SMEs operated in a number of industries and what they had in common was an interest in improving their enterprises. Consequently they used their regional networks which were not aligned to any one industry to make connections and share knowledge. They did not necessarily seek to access specific information. c.) A necessary prerequisite of VCoEs is having vibrant CoEs where face-to-face interaction enhances the development of trust and social capital. This appeared as an important factor facilitating the move to incorporate online knowledge sharing. d.) Younger businesses appeared to gain the most value from knowledge sharing in CoEs as they were using their networks to determine how to grow their firm. e.) The value of VCoEs to the SME participants is primarily in their general connection to other businesses in the region. Since the participants operate in a number of industries, what they have in common is an interest in their enterprises. The main value appears to come from the potential of the VCoEs to add to this connection and to social capital. This study found that successful management of VCoEs must: i) Ensure the network website is actively used by members before attempting to incorporate online knowledge sharing. ii) Monitor and stimulate online forum interaction rather than rely on interaction to occur naturally. iii) Not rely on email as a mechanism for stimulating knowledge sharing. Email is seen as more appropriate for formal documentation than for candid exchange of views. The concept of virtual communities of practice was found to be somewhat inappropriate for the diverse SMEs in the regional networks. Because of their diversity, they do not necessarily see value in sharing knowledge about practice but they do see value in sharing more general information and in providing support, connection and ideas that facilitate the strategic direction of their business. To address this issue, the concept of virtual communities of enterprise (VCoEs) is proposed as recognition of what the participating SMEs had in common: an interest in their individual businesses as part of the region. The original contribution of this research consists of its identification of the issues in linking SMEs across industries. It provides new insights on the business practices of regional SMEs and developed the concepts of Community of Enterprise (CoE) and Virtual Community of Enterprise (VCoE) to capture the special nature of knowledge sharing in regional multi-industry business networks. New perspectives are revealed on the ways that value could be derived from knowledge sharing by these regionally networked SMEs, as such it adds to the body of knowledge in an area where there has been little systematic investigation. This research reinforces the importance of social capital as an essential pre-requisite for accessing the value of intellectual capital in regions. Social capital emerges as vital when establishing and maintaining face-to-face knowledge sharing in regional networks and a necessary pre-condition for successfully establishing online knowledge sharing. Trust is a key factor and this research extends understanding of the role of social capital and the importance of trust in regional networks and online interaction. Its findings have significant implications for the development and management of CoEs and VCoEs as it outlines the key elements that need to be addressed when establishing and maintaining them, the appropriate applications for this context and the issues involved in management of the networking and online contexts. These findings not only increase our understanding of the management dynamics of online networks, they can also provide guidance to those seeking to establish successful VCoEs.

The police activity presents various possibilities of interpretation and a variety of points of view is therefore necessary to develop a series of research that contributes to your understanding as a sociological category. Thus, this research sought to focus its analysis on how police car police Battalion of the Military Police of Alagoas understand the fundamental concepts of force and violence seeking to notice if they are able to differentiate these concepts considering the possibility that the police are developing an action of violence applying to this an understanding of action guided by the force. Likewise , for those who sought to understand the police action is being directed and how they build their social representations based on the stigma of the enemy that must be fought and how effective is the relationship of these stigmas with the application of the label of deviant to a stigmatized subject . The subjective construction of police comprising the "Mala" as the executioner and the periphery of its territory as belonging promoted the understanding police strategies and ways to combat and hunting of this supposed enemy. To that end, we developed a relationship between the theoretical foundations of Howard Becker and Erving Golfman. / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / A atividade policial apresenta diversas possibilidades de interpretação e uma variedade de pontos de vista sendo, portanto, necessário o desenvolvimento de uma série de pesquisas que contribuam para sua compreensão como categoria sociológica. Desta forma, esta pesquisa procurou focar sua análise na forma como os policiais do Batalhão de Radiopatrulha da Policia Militar de Alagoas compreendem os conceitos fundamentais de força e violência procurando perceber se eles são capazes de diferenciar esses conceitos considerando a possibilidade dos policiais estarem desenvolvendo uma ação de violência aplicando a esta uma compreensão de ação pautada na força. Da mesma forma, procurou compreender para quem a ação policial está sendo direcionada e como eles constroem suas representações sociais fundadas nos estigmas do inimigo que precisa ser combatido e como se efetiva a relação desses estigmas com a aplicação do rotulo de desviante ao sujeito estigmatizado. A construção subjetiva do policial compreendendo o "Mala" como o algoz e a periferia como seu território de pertencimento possibilitaram entender as estratégias da policia e as formas de combate e caça a este suposto inimigo. Para tanto, foi elaborado uma relação entre os fundamentos teóricos de Erving Golfman e Howard Becker.