QOS Monitoring in Middleware

Monitoring the system and services is unavoidable if quality of service (QoS) is to be provided. This paper describes monitoring of middleware components, which express the business logic of e-business applications, and the environment in which they execute. Middleware components have become important because of their prominent role in the EAI (Enterprise Application Integration) and implementation of n-tier web applications. We have developed a framework and a supporting toolkit that enables a QoS specialist/engineer to facilitate monitoring and reporting. Two types of monitored data are collected. The QoS engineer identifies critical activities withing a component so that their delays can be captured. Also collected are data from probing sub-systems forming the environment in which the components execute. We discuss in detail our approach to instrumentation of monitoring probes. Probes habe been successfully instrumented for a number of (sub)systems that form the environment in which the componenets execute, systems that include operating, network, and DB systems

Iphone Book

The iPhone is a line of Internet- and multimedia-enabled smartphones designed and marketed by Apple Inc. The first iPhone was unveiled by Apple CEO Steve Jobs on January 9, 2007, and released on June 29, 2007. An iPhone can function as a video camera (video recording was not a standard feature until the iPhone 3GS was released), a camera phone, can send texts and receive visual voicemail, a portable media player, and an Internet client with email and web browsing capabilities, and both Wi-Fi and 3G connectivity. The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one. Third-party as well as Apple application software is available from the App Store, which launched in mid-2008 and now has over 350,000 "apps" approved by Apple. These apps have diverse functionalities, including games, reference, GPS navigation, social networking, e-booksEscuela Técnica Superior de Ingeniería de TelecomunicaciónUniversidad Politécnica de Cartagen

Iphone Bookshelf

The iPhone is a line of Internet- and multimedia-enabled smartphones designed and marketed by Apple Inc. The first iPhone was unveiled by Apple CEO Steve Jobs on January 9, 2007, and released on June 29, 2007. An iPhone can function as a video camera (video recording was not a standard feature until the iPhone 3GS was released), a camera phone, can send texts and receive visual voicemail, a portable media player, and an Internet client with email and web browsing capabilities, and both Wi-Fi and 3G connectivity. The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one. Third-party as well as Apple application software is available from the App Store, which launched in mid-2008 and now has over 350,000 "apps" approved by Apple. These apps have diverse functionalities, including games, reference, GPS navigation, social networking, e-books... To create applications for this device it’s use the APPLE SDK.Escuela Técnica Superior de Ingeniería de TelecomunicaciónUniversidad Politécnica de Cartagen

Quality of service management for non-guaranteed networks

The increasing dominance of multimedia communication posed new requirements for the underlying systems. Multimedia data, formally called continuous media, has time constraints that impose real time limitations for their transmission. Certain levels of service, called Quality of Service (QoS), need to be considered when handling continuous media. The present work utilizes QoS concepts for networks that do not have inherent QoS support. The thesis aims at verifying the possibility of having QoS-controlled communication on non-guaranteed networks. A basic QoS architecture is designed where already existing QoS concepts are adapted to work with non-guaranteed networks. The architecture provides the facilities of QoS specification, mapping, admission, maintenance, monitoring and notification. In addition, a new concept for predictive QoS admission is introduced. The proposed architecture was verified using a prototype system. The results showed an increased percentage of continuous media that arrive on time to their receivers (good put) with higher network loads. The increased good put was at the expense of high network overhead

System and method for delivering a graphical user interface of remote applications over a thin bandwidth connection

A method and system are disclosed for delivering interactive links for presenting applications and second information at a client computer from remote sources in a network-configured computer processing system. In one embodiment, the method includes retrieving over a first communication connection, in response to a request of a client computer, informational content having computer program code embedded therein, and executing the embedded computer program code for establishing a second communication connection to an application server. The method further includes retrieving over the second communication connection first information including presentational information for presenting the application and the second information. The method also includes presenting the application and the second information based upon the presentational information, and storing on the client computer an interactive link for selectively re-establishing the second communication connection to the application server for retrieving the first information and presenting the application and the second information on an as-needed basis. Preferably, the storing of the interactive link includes downloading a graphical representation of the interactive link and storing a file containing information representing an operating environment of the client computer and a network address of the application server.Published versio

Quality of services adaptation model for distributed multimedia application based on RTP protocol on IP network

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal

Weaving technology in the design of learning experiences in world language teacher education: the development of a cognitive tool, an instructional device and an exploration

This dissertation constitutes a first step toward improving our understanding of how better and more sophisticated uses of technology in the context of world language teacher education (WLTE) can be achieved. This work includes (a) the design and development of a prototype of a cognitive tool intended to support the design of language learning experiences; (b) an article that advocates project-based learning (PBL) as a powerful instructional device to support sophisticated learning experiences in WLTE; and (c) the exploration of conceptual and interactual aspects of said cognitive tool. Chapter 2, Project-based learning: A promising pathway to technology integration in world language teacher education proposes a taxonomy of complex WLTE tasks. This article discusses how some of the possibilities that PBL offers can be operationalized in WLTE and argues that providing preservice language teachers experiences with and exposure to sophisticated pedagogical interventions, such as the ones supported by PBL, can improve the integration of technology into the design of language learning activities. As this article shows, PBL is suitable to take full advantage of the complexity of WLTE to immerse preservice teachers in rich design experiences that integrate technology. However, implementing PBL in WLTE poses many challenges. Technology tools that facilitate the conceptualization, creation and management of projects may help in the implementation of PBL in WLTE. Chapter 3, Postcards from the Mind: Designing language learning experiences with technology, is a design-based research study that explores a prototype of such tool. This research gives us some insights into the cognitive processes involved in the design of language learning experiences. The cognitive processes identified included (a) the activation of composite forms of knowledge, such as pedagogical-content knowledge (PCK) and technological pedagogical content knowledge (TPCK), which have been hypothesized to be a prerequisite for the effective integration of technology into learning experiences; (b) the iterative consideration of general pedagogical guidelines; and (c) the application of a mental model to the design of language learning experiences. Interactual and conceptual aspects of the tool that did or did not support the users\u27 cognitive processes are discussed. Findings from this study have implications for WLTE and interface design

Enhancing Multimodal Interaction and Communicative Competence through Task-Based Language Teaching (TBLT) in Synchronous Computer-Mediated Communication (SCMC)

The number of publications on live online teaching and distance learning has significantly increased over the past two years since the outbreak and worldwide spread of the COVID-19 pandemic, but more research is needed on effective methodologies and their impact on the learning process. This research aimed to analyze student interaction and multimodal communication through Task-Based Language Teaching (TBLT) in a Synchronous Computer-Mediated Communication (SCMC) environment. For this purpose, 90 teacher candidates enrolled in the subject Applied Linguistics at a university were randomly assigned in different teams to create collaboratively digital infographics based on different language teaching methods. Then, all the teams explained their projects online and the classmates completed two multimedia activities based on each method. Finally, the participants discussed the self-perceived benefits (relevance, enjoyment, interest) and limitations (connectivity, distraction) of SCMC in language learning. Quantitative and qualitative data were gathered through pre- and post-tests, class observation and online discussion. The statistical data and research findings revealed a positive attitude towards the integration of TBLT in an SCMC environment and a high level of satisfaction with multimodal communication (written, verbal, visual) and student interaction. However, the language teacher candidates complained about the low quality of the digital materials, the use of technology just for substitution, and the lack of peer-to-peer interaction in their live online classes during the pandemic