When it comes down to public transport systems, delays are a hot topic. For a quantitative conclusion whether a delay is just an incident or happens on a regular basis, we have to believe in the figures published in the annual reports of public transport companies. However, even if some data is available online, it is quite hard to independently examine these numbers without information technologies. This paper presents an architecture for extracting Web data from a local transport operator through automated Web observations. By exploiting an already existing Web infrastructure, we are not only able to collect vast amounts of transportation data but may also visualise all transportation units (bus or trams) interactively. Moreover, collecting Web data enables us to make suggestions in order to reassess the performance figures of the annual report in terms of accuracy and precision. Monitoring key values help identifying the state of the transportation system.

The orchestration of the Web is a big issue for Web users all around the world. Web users have a high interest in services, which are able to personalise and customise the Web. However, for Web reactivity there exists only a few limited solutions that allow the aggregation of Web resources. This paper takes a look at existing event- based methods that build upon Event-Condition-Action (ECA) Rules and Complex Event Processing (CEP). Moreover, this paper illustrates the architecture of a fully functioning Condition Action System prototype for the creation of reactivity in between Web resources. In a proof of concept, we could detect and determine the change interval of electronic newspaper headlines. With the proposed system, we are able to orchestrate Web resources e.g. Detecting Web Changes. The orchestration of the Web is a big issue for Web users all around the world. Web users have a high interestin services, which are able to personalise and customise the Web. However, for Web reactivity there exists onlya few limited solutions that allow the aggregation of Web resources. This paper takes a look at existing event-based methods that build upon Event-Condition-Action (ECA) Rules and Complex Event Processing (CEP).Moreover, this paper illustrates the architecture of a fully functioning Condition Action System prototype forthe creation of reactivity in between Web resources. In a proof of concept, we could detect and determine thechange interval of electronic newspaper headlines. With the proposed system, we are able to orchestrate Webresources e.g. Detecting Web Changes.

Stencil calculations comprise an important class of kernels in many scientific computing applications ranging from simple PDE solvers to constituent kernels in multigrid methods as well as image processing applications. In such types of solvers, stencil kernels are often the dominant part of the computation, and an efficient parallel implementation of the kernel is therefore crucial in order to reduce the time to solution. However, in the current complex hardware micro architectures, meticulous architecture-specific tuning is required to elicit the machine's full compute power. We present a code generation and auto-tuning framework \textsc{Patus} for stencil computations targeted at multi- and many core processors, such as multicore CPUs and graphics processing units, which makes it possible to generate compute kernels from a specification of the stencil operation and a parallelization and optimization strategy, and leverages the auto tuning methodology to optimize strategy-dependent parameters for the given hardware architecture.

A lot of situations from daily life have found their counterpart in the internet. Buying or selling goods, discovering information or making social connections have been very successful in the virtual world and make the Web the central working place.

Novel micro-architectures including the Cell Broadband Engine Architecture and graphics processing units are attractive platforms for compute-intensive simulations. This paper focuses on stencil computations arising in the context of a biomedical simulation and presents performance benchmarks on both the Cell BE and GPUs and contrasts them with a benchmark on a traditional CPU system. Due to the low arithmetic intensity of stencil computations, typically only a fraction of the peak performance of the compute hardware is reached. An algorithm is presented, which reduces the bandwidth requirements and thereby improves performance by exploiting temporal locality of the data. We report on performance improvements over CPU implementations.

One of the common tools that support collaborative learning is web-based forum. A web forum is a place where students can ask questions, exchange their ideas, learning materials, learning experiences, and so on. As mobile devices can be used to access information from anywhere and at anytime, it would be useful to integrate these devices into such learning activities. However, it is a challenge to adapt web applications to mobile devices because of the limitations of screen size and processing power. In this paper, we introduce a novel application using mobile phones for accessing multimedia contents efficiently. Our system, the Interactive Multimedia Forum for Mobile Users (CoMobile), supports collaborative learning with various devices such as PC, PDA, and mobile phones.

Small handheld devices such as PDAs and smart phones become more and more popular. Thus, we are seeing a growing number of projects using mobile devices for educational purposes. Due to the limitations of screen size, CPU performance, and memory size, software development for mobile devices is challenging. More critical argument is about the lack of pedagogic and didactic concepts on the usage of mobile devices in education. In this paper, we present a system using mobile devices which supports research experiences for students in a laboratory context. The system allows students to efficiently monitor and control their scientific experiments at anytime, from anywhere. We describe several usage scenarios in the area of nanoscience studies, where the remote control of microscopes is mandatory. We present our system architecture and describe the implementation based on open-source software.

The number of applications that use mobile devices in learning activities is increasing. The limitations of mobile devices such as small screen and inconvenient input facilities can be reduced by using multimedia contents. For example, students can submit questions by taking pictures of their notes; field trip experiences can be shared by video taken from mobile phones, and students can access long text information via voice instead of using SMS that allows only 160 characters per message. However, the use of multimedia information poses a new challenge for system developers: how can the students search on multimedia information? In this paper, we introduce a mobile-learning system that addresses this issue by applying several techniques such as automatic speech recognition (ASR), optical character recognition (OCR), and text to speech (TTS). The system is based on the CoMobile framework, our open source software framework for collaborative work using mobile devices

This paper reports on experiences of using public domain software for teaching parallel programming. We describe the three packages used, namely superpascal, pvm, and alwan and assess their specific strengths and weaknesses. We describe our course activities to teach parallel programming and summarize our experiences made.

An integrated programming environment for the M/sup 3/ multiprocessor is discussed. Three tools support the software development cycle of a parallel program, including the programming, configuration, and debugging/performance measurement phases. Programmer support for performance analysis has been a primary motivation for the system. The sources of performance loss are identified and the ways in which this information is gathered and analyzed are described. As a case study, a fast maze router algorithm is used to show the functionality of the different tools. The M/sup 3/ environment is compared with other state-of-the-art projects.>

A family of monitoring facilities is proposed which are used in combination, e.g. a breakpoint monitor used for debugging purposes, a mailbox monitor for analysis of synchronization traffic, and a bus monitor for measurements of bus load. These tools are used in multi-monitor mode, for which both a common programming-language interface and a user interface are provided. Design concepts are presented, along with the overall structure of such an integrated monitoring tool set in a multiprocessor environment. How a combination of hardware and software monitors is embedded into a MODULA-2 multiprocessor environment is outlined, as a case study.>