Context-Aware Scenarios : Course on Context-Aware Computing 2003

According to a recent definition by Dey and Abowd context is any information that can be used to characterize the situation of an entity. An entity is a person, place or object that is considered relevant to the interaction between a user and an application, including the user and the application themselves. A system is context-aware if it uses context to provide relevant information and/or services to the user, where relevancy depends on the user's task. The following report contains ten scenarios about how context-aware applications could affect ordinary persons in fifteen years. The scenarios have been written by students participating in a course on context-aware computing in the autumn of 2003.Peer reviewe

Secure Communication in Disaster Scenarios

Während Naturkatastrophen oder terroristischer Anschläge ist die bestehende Kommunikationsinfrastruktur häufig überlastet oder fällt komplett aus. In diesen Situationen können mobile Geräte mithilfe von drahtloser ad-hoc- und unterbrechungstoleranter Vernetzung miteinander verbunden werden, um ein Notfall-Kommunikationssystem für Zivilisten und Rettungsdienste einzurichten. Falls verfügbar, kann eine Verbindung zu Cloud-Diensten im Internet eine wertvolle Hilfe im Krisen- und Katastrophenmanagement sein. Solche Kommunikationssysteme bergen jedoch ernsthafte Sicherheitsrisiken, da Angreifer versuchen könnten, vertrauliche Daten zu stehlen, gefälschte Benachrichtigungen von Notfalldiensten einzuspeisen oder Denial-of-Service (DoS) Angriffe durchzuführen. Diese Dissertation schlägt neue Ansätze zur Kommunikation in Notfallnetzen von mobilen Geräten vor, die von der Kommunikation zwischen Mobilfunkgeräten bis zu Cloud-Diensten auf Servern im Internet reichen. Durch die Nutzung dieser Ansätze werden die Sicherheit der Geräte-zu-Geräte-Kommunikation, die Sicherheit von Notfall-Apps auf mobilen Geräten und die Sicherheit von Server-Systemen für Cloud-Dienste verbessert

Recent Developments in Smart Healthcare

Medicine is undergoing a sector-wide transformation thanks to the advances in computing and networking technologies. Healthcare is changing from reactive and hospital-centered to preventive and personalized, from disease focused to well-being centered. In essence, the healthcare systems, as well as fundamental medicine research, are becoming smarter. We anticipate significant improvements in areas ranging from molecular genomics and proteomics to decision support for healthcare professionals through big data analytics, to support behavior changes through technology-enabled self-management, and social and motivational support. Furthermore, with smart technologies, healthcare delivery could also be made more efficient, higher quality, and lower cost. In this special issue, we received a total 45 submissions and accepted 19 outstanding papers that roughly span across several interesting topics on smart healthcare, including public health, health information technology (Health IT), and smart medicine

Network Coding Applications

Network coding is an elegant and novel technique introduced at the turn of the millennium to improve network throughput and performance. It is expected to be a critical technology for networks of the future. This tutorial deals with wireless and content distribution networks, considered to be the most likely applications of network coding, and it also reviews emerging applications of network coding such as network monitoring and management. Multiple unicasts, security, networks with unreliable links, and quantum networks are also addressed. The preceding companion deals with theoretical foundations of network coding

Adapting To Change in the Swiss German Media Industry: Identifying and Developing Competencies Needed by Journalists and Editors To Cope with Future Market Needs - A Collective Case Study

The global media industry has undergone a tremendous change and massive upheaval during the last two decades. On the one side, media consumption has changed immensely and on the other side, media convergence appeared, a phenomenon which describes the merge of different media production genres (print, TV, radio, digital). Using a qualitative collective case study approach, this study was able to explore and depict competencies needed by journalists for coping with media convergence in the Swiss German media industry. The requirements for convergent work are the following seven competency themes: technical skills, social and emotional skills, cognitive skills, writing and linguistic skills, publishing and production skills, innovation and creativity, and leadership and management. This report also gives an overview of the most effective strategies to develop these competency themes and provides a competency development model. A competency specific mixture of learning methods, according to the blended learning approach, is suggested to lead to the best results in gaining media convergence excellence

An Autonomic Cross-Platform Operating Environment for On-Demand Internet Computing

The Internet has evolved into a global and ubiquitous communication medium interconnecting powerful application servers, diverse desktop computers and mobile notebooks. Along with recent developments in computer technology, such as the convergence of computing and communication devices, the way how people use computers and the Internet has changed people´s working habits and has led to new application scenarios. On the one hand, pervasive computing, ubiquitous computing and nomadic computing become more and more important since different computing devices like PDAs and notebooks may be used concurrently and alternately, e.g. while the user is on the move. On the other hand, the ubiquitous availability and pervasive interconnection of computing systems have fostered various trends towards the dynamic utilization and spontaneous collaboration of available remote computing resources, which are addressed by approaches like utility computing, grid computing, cloud computing and public computing. From a general point of view, the common objective of this development is the use of Internet applications on demand, i.e. applications that are not installed in advance by a platform administrator but are dynamically deployed and run as they are requested by the application user. The heterogeneous and unmanaged nature of the Internet represents a major challenge for the on demand use of custom Internet applications across heterogeneous hardware platforms, operating systems and network environments. Promising remedies are autonomic computing systems that are supposed to maintain themselves without particular user or application intervention. In this thesis, an Autonomic Cross-Platform Operating Environment (ACOE) is presented that supports On Demand Internet Computing (ODIC), such as dynamic application composition and ad hoc execution migration. The approach is based on an integration middleware called crossware that does not replace existing middleware but operates as a self-managing mediator between diverse application requirements and heterogeneous platform configurations. A Java implementation of the Crossware Development Kit (XDK) is presented, followed by the description of the On Demand Internet Computing System (ODIX). The feasibility of the approach is shown by the implementation of an Internet Application Workbench, an Internet Application Factory and an Internet Peer Federation. They illustrate the use of ODIX to support local, remote and distributed ODIC, respectively. Finally, the suitability of the approach is discussed with respect to the support of ODIC

At a crossroad: the GATS telecom framework and neo-patrimonial states:the politics of telecom reform in Kenya

Thesis submitted in accordance with the requirements for the degree of Doctor of Philosophy in the School of Social Science and Policy, University of New South WalesThe liberalisation of domestic telecommunication (telecom) markets has become a worldwide trend. As a result, the General Agreement on Trade in Services (GATS), evolving from deliberations within the World Trade Organisation (WTO), has been heralded as the mechanism with which to effect telecom liberalisation domestically. For countries in Africa, the GATS instruments have been translated as a means to establish the principles required for an effective telecom industry supported by key institutions in policy, regulation and implementation. However, the analysis of relevant literature on telecom in Africa has tended to focus on technological developments based on current observable outcomes. This methodology is inadequate because it fails to account for the context-specific nature of the policy arena and framework shaping telecom outcomes. I argue that we must consider telecom outcomes by understanding the nature of political institutions domestically and their interaction with the international arena. To explicate this intersection of ideas, I draw on two seemingly independent theories, Neopatrimonialism and New Institutional Economics (NIE) with reference to the works of van de Walle (2001) and North (1990) respectively, to shed light on the nature of the Kenyan political context and the value of the GATS as an instrument that facilitates credibility and reduces opportunistic ex-post behaviour. It is contended in this study, that for the Kenyan Government, the value of the GATS accession lies in the legitimising role that it facilitates in accessing funds from the international community. This study thus highlights the inevitable tension that arises when domestic policy-reform goals are juxtaposed with international trade obligations undertaken through treaty accession and informed by a liberalisation agenda. A qualitative approach was used to collect the data and involved interviews and documentary analysis. The findings suggest that Kenya is partially in compliance with its GATS telecom commitments. However, this partial reform results from patrimonial tendencies in Kenya and is exacerbated by the need to attract hard currency through aid packages that dictate the nature of the policy process and the relationship between Kenya and the international community. In conclusion, even with policy reforms, state agents always find ways to maintain or create clientelist practises. Unless such reform is accompanied by political changes that provide checks and balances on institutions and state agents, reform policies on their own will not create an effective telecom sector. To truly evaluate telecom reform therefore, we must appreciate the context-specific nature of policy making.The liberalisation of domestic telecommunication (telecom) markets has become a worldwide trend. As a result, the General Agreement on Trade in Services (GATS), evolving from deliberations within the World Trade Organisation (WTO), has been heralded as the mechanism with which to effect telecom liberalisation domestically. For countries in Africa, the GATS instruments have been translated as a means to establish the principles required for an effective telecom industry supported by key institutions in policy, regulation and implementation. However, the analysis of relevant literature on telecom in Africa has tended to focus on technological developments based on current observable outcomes. This methodology is inadequate because it fails to account for the context-specific nature of the policy arena and framework shaping telecom outcomes. I argue that we must consider telecom outcomes by understanding the nature of political institutions domestically and their interaction with the international arena. To explicate this intersection of ideas, I draw on two seemingly independent theories, Neopatrimonialism and New Institutional Economics (NIE) with reference to the works of van de Walle (2001) and North (1990) respectively, to shed light on the nature of the Kenyan political context and the value of the GATS as an instrument that facilitates credibility and reduces opportunistic ex-post behaviour. It is contended in this study, that for the Kenyan Government, the value of the GATS accession lies in the legitimising role that it facilitates in accessing funds from the international community. This study thus highlights the inevitable tension that arises when domestic policy-reform goals are juxtaposed with international trade obligations undertaken through treaty accession and informed by a liberalisation agenda. A qualitative approach was used to collect the data and involved interviews and documentary analysis. The findings suggest that Kenya is partially in compliance with its GATS telecom commitments. However, this partial reform results from patrimonial tendencies in Kenya and is exacerbated by the need to attract hard currency through aid packages that dictate the nature of the policy process and the relationship between Kenya and the international community. In conclusion, even with policy reforms, state agents always find ways to maintain or create clientelist practises. Unless such reform is accompanied by political changes that provide checks and balances on institutions and state agents, reform policies on their own will not create an effective telecom sector. To truly evaluate telecom reform therefore, we must appreciate the context-specific nature of policy makin

Best Practice Spiritual Formation Models in the Christian Hybrid Church

The purpose of this phenomenological study was to explore best practice spiritual formation models and the perceived effectiveness of spiritual formation in the hybrid church community brick-and-mortar and online church settings for individuals in Christian hybrid churches. The concern was whether the churches effectively implemented best practice models through their traditional brick-and-mortar locations and digital platforms that would cause individuals within the Christian community to experience spiritual formation. Spiritual formation is generally defined as “the holistic work of God in a believer’s life whereby systematic change renders the individual continually closer to the image and actions of Jesus Christ” (Pettit, 2008, p. 19). In the model of social network formation, Centola (2010) suggested, “Many behaviors spread through social contact. As a result, the network structure of who is connected to whom can critically affect the extent to which a behavior diffuses across a population” (para. 1). Interpretative phenomenological analysis was an appropriate qualitative design for collecting data via semistructured interviews, allowing participants to respond to open-ended questions and provide insight in their personal experiences. Nine purposively selected participants provided sufficient data to answer the research questions. The sample comprised Pastors, Elders, Directors of Spiritual Formation and Christian Education, and congregants who had attended the traditional or online church community at least twice weekly for a minimum of 1 year. The video-recorded virtual interviews underwent transcription and upload into Dedoose software for coding and data analysis, including reviewing and examining data from individual interviews. Common themes and patterns emerged from coding. The findings showed that with effective models in place for digital platform interaction, using digital platforms to attend church—including Biblical teachings, engagement opportunities, prayer, and connecting—could encourage spiritual formation in an individual’s life just as in a local physical church setting

Non-Formal Education in a World Context

During the past decade the role of non-formal education throughout the world has become an important topic. Educators realize that the formal system cannot solve the diversified and complex problems which face a society today. As a consequence a closer look is now being taken at educational activities outside the established system--especially those non-formal processes which have a relationship to socio-economic development. While many societies have a long tradition of non-formal education, little attempt has been made to utilize this base to provide individuals with a flexible and diversified range of useful learning opportunities. Recently, however, the innate potential of non-formal education is being realized. Today education is being viewed as a life-long process rather than the specified knowledge transmitted in a formal school system. As interest in the field of non-formal education developed, attempts have been made to collect and exchange useful information. Toward this end, the Center for International Education, University of Massachusetts, hosted a World Education Conference and invited educators to share ideas on non-formal education. This booklet contains the papers delivered at that Conference. Some papers are exploratory and some definitive, some are brief overviews, and others are detailed accounts; however, all the papers make a worthwhile contribution to the field. The papers have been organized according to geographical areas

New approaches to data access in large-scale distributed system

Mención Internacional en el título de doctorA great number of scientific projects need supercomputing resources, such as, for example, those carried out in physics, astrophysics, chemistry, pharmacology, etc. Most of them generate, as well, a great amount of data; for example, a some minutes long experiment in a particle accelerator generates several terabytes of data. In the last years, high-performance computing environments have evolved towards large-scale distributed systems such as Grids, Clouds, and Volunteer Computing environments. Managing a great volume of data in these environments means an added huge problem since the data have to travel from one site to another through the internet. In this work a novel generic I/O architecture for large-scale distributed systems used for high-performance and high-throughput computing will be proposed. This solution is based on applying parallel I/O techniques to remote data access. Novel replication and data search schemes will also be proposed; schemes that, combined with the above techniques, will allow to improve the performance of those applications that execute in these environments. In addition, it will be proposed to develop simulation tools that allow to test these and other ideas without needing to use real platforms due to their technical and logistic limitations. An initial prototype of this solution has been evaluated and the results show a noteworthy improvement regarding to data access compared to existing solutions.Un gran número de proyectos científicos necesitan recursos de supercomputación como, por ejemplo, los llevados a cabo en física, astrofísica, química, farmacología, etc. Muchos de ellos generan, además, una gran cantidad de datos; por ejemplo, un experimento de unos minutos de duración en un acelerador de partículas genera varios terabytes de datos. Los entornos de computación de altas prestaciones han evolucionado en los últimos años hacia sistemas distribuidos a gran escala tales como Grids, Clouds y entornos de computación voluntaria. En estos entornos gestionar un gran volumen de datos supone un problema añadido de importantes dimensiones ya que los datos tienen que viajar de un sitio a otro a través de internet. En este trabajo se propondrá una nueva arquitectura de E/S genérica para sistemas distribuidos a gran escala usados para cómputo de altas prestaciones y de alta productividad. Esta solución se basa en la aplicación de técnicas de E/S paralela al acceso remoto a los datos. Así mismo, se estudiarán y propondrán nuevos esquemas de replicación y búsqueda de datos que, en combinación con las técnicas anteriores, permitan mejorar las prestaciones de aquellas aplicaciones que ejecuten en este tipo de entornos. También se propone desarrollar herramientas de simulación que permitan probar estas y otras ideas sin necesidad de recurrir a una plataforma real debido a las limitaciones técnicas y logísticas que ello supone. Se ha evaluado un prototipo inicial de esta solución y los resultados muestran una mejora significativa en el acceso a los datos sobre las soluciones existentes.Programa Oficial de Doctorado en Ciencia y Tecnología InformáticaPresidente: David Expósito Singh.- Secretario: María de los Santos Pérez Hernández.- Vocal: Juan Manuel Tirado Mart