Digital libraries on an iPod: Beyond the client-server model

This paper describes an experimental system that enhanced an iPod with digital library capabilities. Using the open source digital library software Greenstone as a base, this paper more specifically maps out the technical steps necessary to achieve this, along with an account of our subsequent experimentation. This included command-line usage of Greenstone's basic runtime system on the device, augmenting the iPod’s main interactive menu-driven application to include searching and hierarchical browsing of digital library collections stored locally, and a selection of "launcher" applications for target documents such as text files, images and audio. Media rich applications for digital stories and collaging were also developed. We also configured the iPod to run as a web server to provide digital library content to others over a network, effectively turning the traditional mobile client-server upsidedown

Hardware acceleration of reaction-diffusion systems:a guide to optimisation of pattern formation algorithms using OpenACC

Reaction Diffusion Systems (RDS) have widespread applications in computational ecology, biology, computer graphics and the visual arts. For the former applications a major barrier to the development of effective simulation models is their computational complexity - it takes a great deal of processing power to simulate enough replicates such that reliable conclusions can be drawn. Optimizing the computation is thus highly desirable in order to obtain more results with less resources. Existing optimizations of RDS tend to be low-level and GPGPU based. Here we apply the higher-level OpenACC framework to two case studies: a simple RDS to learn the ‘workings’ of OpenACC and a more realistic and complex example. Our results show that simple parallelization directives and minimal data transfer can produce a useful performance improvement. The relative simplicity of porting OpenACC code between heterogeneous hardware is a key benefit to the scientific computing community in terms of speed-up and portability

Interactive visual exploration of a large spatio-temporal dataset: Reflections on a geovisualization mashup

Exploratory visual analysis is useful for the preliminary investigation of large structured, multifaceted spatio-temporal datasets. This process requires the selection and aggregation of records by time, space and attribute, the ability to transform data and the flexibility to apply appropriate visual encodings and interactions. We propose an approach inspired by geographical 'mashups' in which freely-available functionality and data are loosely but flexibly combined using de facto exchange standards. Our case study combines MySQL, PHP and the LandSerf GIS to allow Google Earth to be used for visual synthesis and interaction with encodings described in KML. This approach is applied to the exploration of a log of 1.42 million requests made of a mobile directory service. Novel combinations of interaction and visual encoding are developed including spatial 'tag clouds', 'tag maps', 'data dials' and multi-scale density surfaces. Four aspects of the approach are informally evaluated: the visual encodings employed, their success in the visual exploration of the clataset, the specific tools used and the 'rnashup' approach. Preliminary findings will be beneficial to others considering using mashups for visualization. The specific techniques developed may be more widely applied to offer insights into the structure of multifarious spatio-temporal data of the type explored here

MEPs online: Understanding communication strategies for remote representatives

This article explores the use of the Internet by Members of the European Parliament (MEPs), assessing the adoption of online communication as well as its strategic uses. In particular we analysed the websites, weblogs and social networking site profiles of all MEPs who linked to an online presence from the European parliament homepage, a total of 440 MEPs representing all 27 member nations. Through a thorough analysis of the content using a scheme designed to record the presence and functionality of 103 specific features and tools and recency of updates, we assess how MEPs use the Internet to connect with a range of audiences; from journalists to loyal supporters. We find MEPs embracing a range of features which would be appealing to a wide range of different visitors. There is a minor generational divide among MEPs based both on their age and the length of time their country has been a member of the European Union. However overall we suggest there is an ebb and flow of innovation within the online political communication of these parliamentarians

Spartan Daily, March 10, 1999

Volume 112, Issue 30https://scholarworks.sjsu.edu/spartandaily/9387/thumbnail.jp

THE FORMATIVE EVALUATION OF A WEB-BASED PERFORMANCE SUPPORT SYSTEM DESIGNED TO IMPROVE ACCOMMODATION OF STUDENTS WITH DISABILITIES IN POSTSECONDARY EDUCATION

The numbers of students with disabilities enrolling in postsecondary institutions has increased since the passage of key disability rights legislation. As a result, the need for information about accommodating postsecondary students with disabilities has increased in the last two decades, especially since the passage of the Higher Education Amendments of 1998. This study used Dick and Carey\u27s (1996) model of instructional design to conduct a formative evaluation of a Web-based performance support system (WPSS) designed for academic administrators, instructional employees, and auxiliary service administrators to enhance accommodations for postsecondary students with disabilities. Formative evaluation consisted of expert review, one-to-one, consumer analysis, and field trial phases. During the expert review phase, subject matter experts, instructional design and usability experts, and individuals with disabilities completed surveys to assess the degree to which the WPSS contained current content, included elements of effective design, and was accessible to individuals with disabilities. During the one-to-one, consumer analysis, and field trial phases, academic administrators, instructional personnel, and auxiliary service administrators on the University of Kentucky campus completed a questionnaire using the WPSS to assess the degree to which the WPSS was effective in providing information. In addition, users completed a survey to assess their perceptions of the WPSS. Finally, data were collected to assess difficulties encountered by users. Results from the expert review phase of the evaluation suggest that the WPSS contained current content, included elements of effective design, and was accessible to individuals with disabilities. Analysis of the questionnaire scores from all phases revealed that users obtained a mean accuracy rate of 74% or higher on the in-session questionnaire. In addition, all users required a mean of 3.9 minutes or less per question to locate responses for items on the questionnaire. The perceptions of all users about the WPSS were positive. Results also indicated that users reported a variety of technical difficulties; however, the majority were related to server errors. Revisions made to the WPSS after each phase of evaluation are described. Implications of the investigation for researchers and Web developers, limitations of the investigation, and areas for future research also are discussed

Community building and virtual teamwork in an online learning environment

In the world of OTIS, an online Internet School for occupational therapists, students from four European countries were encouraged to work collaboratively through problem based learning by interacting with each other in a virtual semi-immersive environment. This paper aims to explore the issues that there was little interaction between students from different tutorial groups and virtual teamwork developed in each of the cross cultural tutorial groups. Synchronous data from European students was captured during tutorial sessions and peer booked meetings and evidence suggests that communities of interest were established. It is possible to conclude that collaborative systems can be designed, which encourage students to build trust and teamwork in a cross cultural online learning environment. </p