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This demo paper presents the Tasklet system - a middleware for distributed computing. The Tasklet system allows developers to offload self-contained units of computation - the so-called Tasklets - to a pool of heterogeneous computing devices. In this demonstration of the Tasklet system, we uncover the otherwise transparent process of computation offloading and scheduling. Further, we show the easy...
In order to properly support patient treatment, e-health systems need to dynamically integrate heterogeneous types of medical sensors and provide access to streams of sensed medical data independent of the patients location or the movement of the respective medical devices. Treatment processes usually include several steps and medical departments, which means that sensors have to be moved between...
Several projects have been proposed to make easier the distance education monitoring and assessment, based on logs and databases. In this paper, we present a data collection framework based on logical and physical sensor network that can track and capture events generated by users and applications in real-time. For that, sensors are deployed in Learning Management Systems (LMS), in user devices and...
In this paper, we present a new mobile platform to support emerging pervasive applications in a Personal Area Network (PAN)-scale dynamic mobile computing environment. The PAN-scale computing environment will constitute an important part of future pervasive-space technology with highly proactive applications, requiring continuous monitoring of users' contexts. The context-aware applications impose...
This paper presents the development of MMIM (Middleware for Monitoring and Information Management): a collection of software that communicates a wireless sensor network (WSN) based on IEEE 802.15.4 standard with a web site. The WSN collects vital signs of patients and sends them to a database located in a web server. On the other end, people who care for the health of these patients, monitor the web...
Recently, message brokering services that are based on publish and subscribe paradigm are widely adopted in many areas such as remote facilities monitoring. Typically, they support a large scale distributed network of exchanging messages between services and clients. In this paper, we introduce a cloud-based message brokering service which allows better scalability and dynamic load balancing between...
Even though trust plays a significant role during decision-making in open collaborative environments, still end-user trust mechanisms have not be deployed in the EGEE grid computing setting. In this paper, we conduct a preliminary investigation on the integration of the trust paradigm in that environment, with a special focus on achieving end-user trust in an intuitive and practical manner.
The execution of applications in dependable system requires a high level of instrumentation for automatic control. We present in this paper a monitoring solution for complex application execution. The monitoring solution is dynamic, offering real-time information about systems and applications. The complex applications are described using workflows. We show that the management process for application...
Information services are one of the most important requirements of the grid system. They include Discovery and Monitoring of the resources. The discovery is the process of finding the computational resource/service. The Monitoring detects and diagnoses problems. Both require the information collection about the resources from the complete grid environment. This paper intends to explore some mechanisms...
Summary form only given. Wireless sensor networks create an innovative technology that enables users to monitor and study the physical world at an extremely high resolution. Query processing in such ad-hoc environments is a challenging task due to the complexities imposed by the inherent energy and communication constraints. To this end, the research community has proposed to take into account user-defined...
This paper describes a benchmarking workload model for business process execution language (BPEL) engines for Web services. The proposed model is based on simulation of real world traffic conditions by defining a set of requirements which best characterize the end-users. The performance characteristics are evaluated on top of collected measurements such as success/fail rate, response times or round-trip...
The UNICORE grid system provides a seamless, secure and intuitive access to distributed grid resources. In recent years, UNICORE 5 is used as a well-tested grid middleware system in production grids (e.g. DEISA, D-Grid) and at many supercomputer centers world-wide. Beyond this production usage, UNICORE serves as a solid basis in many European and International research projects and business scenarios...
Collecting data on user activities is one of the fundamental middleware services in Web-enabled systems. The collected data is analyzed and used by various high-level services, like user profiling, accounting, security auditing, and system health monitoring. In this paper, we present architecture and performance evaluation of usage tracking components for service-oriented middleware systems. Presented...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
This is an introduction to the proceedings of the MWS 2007 workshop held at EDOC 2007. It first explains the motivation for and background of the workshop. Then, it contains a short description of the keynote, each long and short peer-reviewed paper, and the discussion session "impact of various execution environments on middleware for web services". After the closing statements, MWS 2007...
The Open Distributed Processing Reference Model (ODP-RM) provides viewpoints and abstract infrastructure guidelines that can be used for a basis for enterprise architecture, especially for an inter-enterprise architecture. The ODP-RM does not prescribe methodology for modeling itself, but provides common vocabulary and focus for description. This paper performs a brief analysis of the ODP-RM (and...
In this paper we discuss the use cases for monitoring of Web services for compliance with policies and service level agreements. In particular, the quality of service associated with Web service interactions and its monitoring rely on the proper use by both parties of related Web service protocols. This monitoring is best served by an event-centric model and an extensible scripting language, such...
MPSS simulates the behavior of a high traffic transaction processing system. An effective use of MPSS is the analysis of the impact of exclusive control of system resources over multiple processes. MPSS consists of a control process and multiple application processes. The control process is designed to simulate a transaction processing monitor. It initiates and oversees multiple application processes...
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