Krzysztof Walczak | Poznan University of Economics (original) (raw)

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Papers by Krzysztof Walczak

Concurrency and Computation: Practice and Experience, 1997

Abstract Web technologies–in particular linked Java servers and clients–allow new dynamic collabo... more Abstract Web technologies–in particular linked Java servers and clients–allow new dynamic collaborative environments linking people and computers. We describe the architecture of a system, TANGOsim, that combines a Java collaborative environment with an executive providing general message filters, and an event-driven simulator. The initial application is to command and control, but we describe how this approach can also be used in other areas, such as health care, scientific visualization and (distance) education.© 1997 John Wiley &amp;amp;amp;amp;amp;amp;amp;amp; ...

IEEE Computer, 2006

Virtual reality (VR) and augmented reality (AR) technologies offer an ideal presentation medium f... more Virtual reality (VR) and augmented reality (AR) technologies offer an ideal presentation medium for museums and other cultural heritage institutions. Virtual exhibitions enable different audiences, including the disabled and students of all ages, as well as the general public to access and interact with vast numbers of objects scattered among various localities in an engaging and informative way.

IEEE Computer, 2003

Market acceptance of new personal computing products and services strongly depends on the quality... more Market acceptance of new personal computing products and services strongly depends on the quality of their user interfaces. Virtual reality is an emerging technology that promises significant advances in this area. The term itself is broad, ranging from simple 3D animation programs with no user interaction to systems with head-mounted displays, 3D manipulators, and other specialized hardware to immerse users in interactive virtual worlds. Originally developed for classic computer systems, VR technology is currently spreading to other platforms, including consumer electronics and interactive television systems. To enable the creation of active VR applications, we developed X-VRML. X-VRML is a high-level XML-based procedural language that adds dynamic modeling capabilities to virtual scene description standards such as VRML/X3D and MPEG-4.

A new method of dynamic generation of virtual scenes for use in Internet virtual reality applicat... more A new method of dynamic generation of virtual scenes for use in Internet virtual reality applications is presented. The virtual scenes are dynamically generated from virtual scene models coded in a high-level XML-based language called X-VRML. The language consists of a set of XML tags introducing new elements to programming of virtual reality. These new elements include object-orientation, access to databases, and programming techniques known from procedural languages like variables, conditions, and loops. The X-VRML language overcomes the main limitations of current virtual reality systems. Use of X-VRML simplifies the code of virtual scene models, allows retrieval of data from databases, selection of virtual scene contents, customization of virtual scenes, and efficient coding of elements that have repetitive structure. Applications of X-VRML include on-line data visualization, geographical information systems, scientific visualization, virtual games, and e-commerce applications such as virtual shops

Information Processing Letters, 2003

A method of modeling virtual worlds in databases is presented. The virtual world model is concept... more A method of modeling virtual worlds in databases is presented. The virtual world model is conceptually divided into several distinct elements, which are separat.

In this paper, we propose a novel approach to modeling and dynamic creation of behavior-rich inte... more In this paper, we propose a novel approach to modeling and dynamic creation of behavior-rich interactive 3D contents. The approach, called Beh-VR, enables dynamic generation of virtual scenes from arbitrarily selected sets of specifically designed reusable virtual objects, called VR-Beans. Behavior of the objects is determined by associated scripts encoded in a high-level language called VR-BML. The method significantly simplifies creation of interactive 3D scenes and can be applied to various application domains. Examples discussed in the paper are related to creation of educational and entertainment contents in the cultural heritage domain.

Increasing capabilities of computer systems enable development of new, better ways of data visual... more Increasing capabilities of computer systems enable development of new, better ways of data visualization and interaction between users and computers. One of the most powerful mechanisms of data visualization and interaction is virtual reality. In this paper the use of virtual reality as a platform for multimedia presentations is proposed. A technique which enables common storage and retrieval of virtual reality and multimedia data in databases is presented. An appropriate modeling method for virtual reality data in databases and dynamic synthesis of their presentations is discussed. A geographic information system is described as an example

Google, Inc. (search). ...

A novel approach to three-dimensional visualization of search results is presented. In the propos... more A novel approach to three-dimensional visualization of search results is presented. In the proposed method a search result is progressively visualized by a sequence of customizable 3D interfaces. The interface applied at each visualization stage is selected with regards to properties of the search result and user interactions. A user may also change mapping of search result properties to visual attributes of the interfaces.

Copyright © 2004 by the Association for Computing Machinery, Inc. Permission to make digital or h... more Copyright © 2004 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for commercial advantage and that copies bear ...

IEEE Computer, 2004

The exponential growth in Web sites is making it increasingly difficult to extract useful informa... more The exponential growth in Web sites is making it increasingly difficult to extract useful information on the Internet using existing search engines. Despite a wide range of sophisticated indexing and data retrieval features, search engines often deliver satisfactory results only when users know precisely what they are looking for. Traditional textual interfaces present results as a list of links to Web pages. Because most users are unwilling to explore an extensive list, search engines arbitrarily reduce the number of links returned, aiming also to provide quick response times. Moreover, their proprietary ranking algorithms often do not reflect individual user preferences. Those who need comprehensive general information about a topic or have vague initial requirements instead want a holistic presentation of data related to their queries. To address this need, we have developed Periscope, a 3D search result visualization system that displays all the Web pages found in a synthetic, yet comprehensible format.

Abstract A new method of building active database-driven virtual reality applications is presente... more Abstract A new method of building active database-driven virtual reality applications is presented. The term&amp;amp;amp;amp;quot; active&amp;amp;amp;amp;quot; is used to describe applications that allow server-side user interaction, dynamic composition of virtual scenes, access to on-line data, continuous visualization, and implementation of persistency. The use the X-VRML language for building active applications of virtual reality is proposed. X-VRML is a high-level XML-based language that overcomes the main limitations of the current virtual reality systems by ...

International Journal on Digital Libraries, 2005

We describe a system which addresses all the processes involved in digitally acquiring, modelling... more We describe a system which addresses all the processes involved in digitally acquiring, modelling, storing, manipulating and creating virtual exhibitions from 3D museum artefacts. More specifically, we examine the significance of metadata in enabling and supporting all of these processes and describe the extensive facilities provided for authoring, maintaining and managing metadata. The development of the system has been heavily influenced by factors relating to interoperability, standards, museum best practice and feedback from two museum pilot sites. Finally, we briefly consider the system in the wider context of applications such as virtual learning environments and distributed repositories of archives.