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Using visualization and exploration tools can be of great use for the understanding of a software system when only its source code is available. However, understanding a large software system by visualizing only its lower level artifacts (e.g., classes, methods) and the relations between them does not scale for industrial-size systems. To address the scalability issue, higher level hierarchical abstractions...
A new data acquisition program for personal computers with Windows operating system has been built at Charles University van de Graaff laboratory. It allows fast data acquisition from VME, CAMAC and other PC interface cards using interrupt or polling mode via several types of crate controllers, basic on-line analysis and visualization of acquired data in graphs and histograms. The program is written...
Summary form only given. Stories in narrative or visual forms are more than just a collection of words or images. They can convey lots of information through powerful indirect messages, information that is sometimes unseen by technology. Stories can also form instantaneous collaborations between the story, its teller, and the audience. This collaboration is invisible but could be compelling. The article...
Web applications suffer from software and configuration faults that lower their availability. Recovering from failure is dominated by the time interval between when these faults appear and when they are detected by site operators. We introduce a set of tools that augment the ability of operators to perceive the presence of failure: an automatic anomaly detector scours HTTP access logs to find changes...
To establish improved therapies for patients suffering from severe neurological and psychiatric diseases, a demand controlled and desynchronizing brain-pacemaker has been developed with techniques from statistical physics and nonlinear dynamics. To optimize the novel therapeutic approach, brain activity is investigated with a magnetoencephalography (MEG) system prior to surgery. For this, a realtime...
Classroom interactions involving handheld wireless connectivity can produce great learning gains. However, characterizing interactions as they happen can be difficult. Based on the log files from two months of use in math classrooms, we have built a visualization tool for examining collaborative and individual use. The tool can be used to aid in qualitative analyses such as frequently conducted to...
This paper describes the design and implementation of MoViTo (mobility visualization tool) a generic visualization tool developed mainly to facilitate the observation and the understanding of mobility patterns in wireless networks. As an example, a WiFi environment has been chosen to display the usage of this tool but other context (such as ad-hoc networks) can be studied by adapting its generic entities...
A crucial phase of the KATRIN (Karlsruhe TRItium Neutrino) experiment involves the heating and cooling of both spectrometer vessels to obtain a UHV (ultra-high vacuum). These large vessels are hidden under a thick (~40cm) thermal insulation layer, making non-contact observation of the temperature distribution of the vessel surfaces impossible. Therefore, about 400 temperature sensors are mounted directly...
A middleware named EnGrid for distributed computing has been developed. The EnGrid employs the notion of pure peer-to-peer (P2P) for ease of use, not for sharing computer resources across the world as in conventional P2P. We have also developed three PSE systems on EnGrid for civil engineering applications: parameter sweep system for finite element method (FEM), parameter optimization system for FEM,...
The Stockholm Educational Air Shower Array (SEASA) project is deploying an array of plastic scintillator detector stations on school roofs in the Stockholm area. Signals from GPS satellites are used to time synchronise signals from the widely separated detector stations, allowing cosmic ray air showers to be identified and studied. A low-cost and highly scalable data acquisition system has been produced...
The complexity of the hep detectors for LHC (CMS tracker has more than 50 millions of electronic channels) the large number of people in charge of it (more than 100 people from 10 labs distributed worldwide) and the availability of the grid computing environment require novel ways to visualize data coming from detector for use in online monitoring. We suggest here an approach that takes advantage...
Versatile power supply (VPS) control is a component of a network-based control system and SCADA software with a client/server architecture developed using the data logging server control by National Instruments. Installing OLE for process control (OPC) client in the data server of VPS allows access to every kind of CAEN power supply (SY1527, SY527, etc.) that supports OPC server functionality and...
To best exploit the potential of the grid, it is necessary to "grid-enable" legacy applications that were not originally developed to run on a grid. In this paper, a generic framework to grid-enable legacy applications is presented. In particular, this paper focuses on a general approach to model and represent an application in a way that is supportive of the key properties of the grid-enabling...
Implementation of a real-time image visualization system on a reconfigurable chip (FPGA) is proposed. The system utilizes an innovative stereoscopic image capture, processing and visualization technique. Implementation is done as a two stage process. In the first stage, the stereo pair is captured using two image sensors. The captured images are then synchronized and sent to the second stage for fusion...
The use of computer-mediated communication and collaboration systems has become increasingly widespread over the past decade. These systems have also become the focus of research into online interaction and communication. Such research is facilitated by the use of information visualization, and a sampling of different types of visualization applied to computer-mediated communication and collaboration...
Three graphical data displays of histograms, box plots, and behavior plots are used in existing literature for subjective model validation. In this paper, we present two additional plots that can be used for displaying graphs of data; these are the so-called circle plots and ordinal plots. These plots are easy to generate using model data and system data. Like the existing plot types, no statistical...
We present a description of our ongoing efforts to develop a chemistry grid portal by utilizing core grid technologies for computational chemistry and molecular science applications. The portal aims to provide the Australian computational chemistry and molecular science community a uniform and integrated user interface for scientists to access and execute distributed applications through a conventional...
As the amount of scientific information available to researchers increases, the challenge of sifting through the information to find what is truly important to their work increases, as well. In this paper we describe ScienceSifter, a tool that addresses this challenge by enabling groups of researchers and channel editors to create and customize information feeds. Using ScienceSifter, users can combine...
Server-side visualisation systems comprise of a thin client connected to a rendering service located on the data server. We present a systematic and quantitative method for evaluating server-side visualisation systems. We evaluate the fundamental limitations of such systems in relation to network performance. Using these results we benchmark four common architectures by implementing clients and/or...
Immersive environments are being used to support mission operations at the Jet Propulsion Laboratory. This technology contributed to the Mars Pathfinder Mission in planning sorties for the Sojourner rover and is being used for the Mars Exploration Rover (MER) missions. The stereo imagery captured by the rovers is used to create 3D terrain models, which can be viewed from any angle, to provide a powerful...
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