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$(LMS\) an der Universität Freiburg - Lehrstuhl Algorithmen ...$

operator that something must be wrong there. Analysing access and path statistics carefully and inserting appropriate links or restructuring the server accordingly helps a lot to ensure proper quality. 4 Making the Readers' Life Easier Up to now discussion was about how to add as much information as possible to documents. One of the points was to interlink documents to the maximum extent possible by adding inter- and intra-document links as well as glossary hyperlinks and more. Using the tools described above this can be done with minimum effort and stability of hyperlinks is guaranteed by Hyper-G. But there is a negative aspect too: too many hyperlinks also means too many color changes which disturbs the reading flow. As has been discussed earlier Hyper-G supports different kinds of hyperlinks: annotations, glossary links, referential hyperlinks, inline links, texture links and many more. To not have to many disturbing color changes links of different types can be turned off and on seperately when needed. Another possibility that is at the moment only implemented in Harmony is to show different kinds of links in different colors (Harmony is one of the very specialized Hyper-G authoring tools). Utilizing this feature the reader would know about the type of a link before even following it. As has been mentioned before grouping of documents in clusters is one of the basic concepts in Hyper-G. One of the applications of clusters is it to provide multilingual versions of the same document. Naturally it is normally not possible to translate every single document on a server to several different languages. On the other hand it is not too much effort to translate neuralgic and mostly static parts of the data such as glossaries. In reality if there are multilingual glossaries existing it normally does not even help too much to translate the papers as well. Consider an international journal: the language of papers will most likely be English and readers will understand English. The only problem is that some very topic-specific words will be found in the papers, in which case readers can use the glossary to look up unknown words. If the readers are not native English speakers and the glossary also contains a difficult explanation they would be forced to follow some more links between glossary entries until they finally understand the meaning. For this group of readers a translation of the first entry would very likely help a lot. And there is certainly a high number of non native English speakers reading English papers. An all-time-important aspect on the Web is transmission speed. Long distance data transmissions on a slow transmission rate are annoying and in the worst case electronic publications will not be accepted by the reader for the lack of availability. There are two ways out of this dilemma that can be gone simultaneously: providing documents of different size and quality as well as mirroring and caching documents. For providing documents of different size again Hyper-G's cluster concept can be used. A cluster could e.g. hold the same document in HTML format with small inline images for quick browsing, the better version could also be HTML but with high quality images and the professional version could be PostScript with 600 dpi resolution including 600dpi true color images. The reader decides once per session which level of quality to get and the rest is done automatically throughout the whole session. Naturally readers can change their choice on the fly. More than that - consider the case of an HTML document with different sets of inline images - small ones with poor quality and huge professional ones. On standard first generation Web servers two different versions of the HTML document must be provided with different links. On Hyper-G the links are not directly pointing to the images but to the clusters! In this case the HTML document has to be prepared only once and the inline images automatically change according to the readers' choice, even on the fly if desired! The other well known solution to overcome the transmission speed problem is it to cache and mirror documents. Naturally Hyper-G has the standard proxy functionality implemented. Besides that a sophisticated document replication mechanism [see Kappe 95] is implemented in Hyper-G. Document replication in Hyper-G is understood to be a special kind of mirroring with the mirrored documents knowing about the original. This is possible by giving the documents a replica identification that matches the global object Id of the original document. The global object Id of documents in Hyper-G is a world wide unique 64 bit identifier. The effect is that documents can be mirrored to the local site without the users having to know about. If they try to access one of the original documents on the remote server or even one of the documents on another mirror site they automatically get the replicated document from the local site instead of doing a long distance data transfer.
5 Current Electronic Publications With Hyper-G Technology The first electronic journal based on Hyper-G was J.UCS - the Journal of Universal Computer Science by Springer Pub. Co. It is a monthly journal covering all knowledge areas of computer science. Additionally to the Web version a yearly CD-ROM and printed version are provided by Springer. Papers in J.UCS appear in two parallel formats: hypertext and hyperlinked PostScript, PDF is planned for 97. See [http://www.iicm.edu/jucs] - the master J.UCS server - for more details and information about mirrors. Academic Press decided to distribute JNCA - the Journal for Network and Computer Applications (former JMCA and JMA) - electronically using Hyper-G starting in January 96. JNCA can be found at [http://www.iicm.edu/jnca], mirrors are in preparation. One of the most reputable journals in physics, FBS - Few Body Systems - also by Springer - started regular electronic service in January 1995 using Hyper-G. Find FBS at [http://www.iicm.edu/fbs] The German bible of Data structures - Datenstrukturen by Ottmann and Widmeyer - is published electronically on a Hyper-G server using hyperlinked PostScript. At the moment the german version is available at [http://www.iicm.edu/datenstrukturen] Since this paper excessively deals with Hyper-G - naturally also the ``Hyper-G bible'' called ``HyperWave - The Next Generation Web Solution'' published by Addison Wesley is available electronically at [http://www.iicm.edu/hgbook] (Note: HyperWave is the product name of the software whereas Hyper-G is the name for the underlying technology). Check out [http://www.iicm.edu/hyperwave] for detailed information about Hyper-G technology and the HyperWave product line. Additionally to the Hyper-G bible Addison Wesley decided to publish some 30 books electronically on the Web using Hyper-G. Some of them are already under preparation. As soon as they are released they can be found in the IICM electronic library [http://www.iicm.edu/electronic_library]. One of the most comprehensive German encyclopedias - Meyer's Lexikon - is electronically available via Hyper-G on an n-user license basis - have a quick look at [http://www.iicm.edu/ref.m10] if there is something you always wanted to know. References [Adobe 90] Adobe Systems Inc.: ``PostScript Language Reference Manual'', 2nd Edition, Addison-Wesley (1990) [Adobe 93] Adobe Systems Inc.: ``Portable Document Format Reference Manual'', Addison-Wesley (1993) [Andrews 95] Andrews K., Kappe F., Maurer H. and Schmaranz K.: ``On Second Generation Network Hypermedia Systems'', Proc. ED-MEDIA '95, (1995), 69-74. [Berners-Lee et al 94] Berners-Lee, T., Cailliau, R., Luotonen, A., Nielsen, H. and Secred, A.: ``The World-Wide Web.'' Communications of the ACM 37,8 (1994), 76-82. [Kappe 91] Kappe F., Maurer H. and Tomek I.: ``Hyper-G - Specification of Requirements'', Proc. Conference on Intelligent Systems (CIS) '91, (1991), 257-272 [Kappe 95] Kappe F.: ``A Scalable Architecture for Maintaining Referential Integrity in Distributed Information Systems'', J.UCS 1,2, (1995), 84-104.
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Proceedings of WebNet 96— WebNet
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FULL PAPERS BRIAN BEVIRT Designing
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THIERRY LEVOIR & REMI BASTIDE SADS:
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MASAYASU AOTANI Distance education
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IAIN LANGDON Education for Changing
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PANELS M J MCALISTER, P COMER & MIS
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Designing Hypertext Navigation Tool
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Organize the Contents of Your Site
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multiple hierarchy charts have to b
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Developing Structured WWW-Sites wit
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Links refer to Templates. From the
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typing tool, which on the one hand
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and implement commercial Web-sites.
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constraints. It is important to rem
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A three-rowed "desktop" was used as
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All assignments were tracked, and s
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Figure 5: Student Information Toolb
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positive values to the course: 1. F
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2. Problem Areas We have identified
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in our system is quite large, and p
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map information for display into th
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- whether these new applications co
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4.3. The Production Phase The produ
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Requests 2500000 2000000 1500000 10
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information systems. Since late 199
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QuestWriter, which will be availabl
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Figure 1: Typical Study Approaches
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Figure 2: Feedback Loop for Questio
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educational Web page design. We hav
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Identifying and Meeting Needs of In
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Two new forms-driven templates, one
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What We Learned About Coaching Web
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Introduction The WWW as a Primary S
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Processing the Order Once users hav
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documentation, report a problem to
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VRML and the Web: A Basis for Multi
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Plate 2: Three users represented by
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Figure 2: Interfae components to ex
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Avatar Distribution Figure 3: Avata
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Introduction Tracking WWW Users: Ex
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etween subsequent requests, and an
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server not to cache that object. Ho
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[Benford et al. 1996] Benford, S.D.
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Published on the Web from the WebNe
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current state of knowledge represen
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Figure 1: Textook and Glossary wind
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Part of this work is supported by a
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Database 2. Review of Related Work
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Display Password Screen Check User
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Recently, Java has changed the way
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To meet our requirements, we have o
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Using the WebSM the creation of a q
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store its result in a variable, usi
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Table of Contents Executive Summary
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Chapter One: The Web Marketplace Gr
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4) Advertising Subsidy growing dram
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effectiveness of the ad with any on
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3) Server Performance The Web commu
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Chapter Three: Andromedia’s Aria
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3) Distributed Design Although Obje
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Aria.monitor is comprehensive with
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The Aria.recorder is also capable o
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is being used to create real-time r
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The Reporter user interface provide
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Aria.reporter takes advantage of th
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Introduction Automating Hypermedia
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Figure 3: 2: Add Course Graphic Cre
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Longevity of the HTML Course Creato
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Methodological Issues in Studying a
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4. Complexity of User Interaction:
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automatically, in a reliable and pe
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web users (i.e., scrolling list of
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the NSF EXPRES project. In [Galeghe
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Astronomy and Space Science Relevan
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surface of Pluto - assembled throug
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The Web as Process Tool and Product
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collaboratively produced report abo
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In the AIT course, key satisfaction
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Explorations: the Cornell Theory Ce
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version of Netscape 2.0 (Netscape w
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from video tape) and compromised on
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Designing a Course on the WEB : the
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charge of a training institute, we
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Another way of supporting "point to
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References [Derycke and D’Halluin
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like SGMLS or SP [Clark 95]. The WW
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MRTSpace is based on MRT, a Minimal
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2.3 Geometric and visual ‘continu
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IP Multicast messages do not work o
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came into common use. A number of e
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probably to human culture as a whol
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3D Visualization of WWW Semantic Co
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2.1 Extracting and Organizing WWW S
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mantic space comes from exploring r
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Introduction Interactive Justice Th
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presented by both public prosecutor
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A different communication mode allo
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Convergence to the Information High
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over 9 million at the beginning of
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unreliable electronic components co
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in an integrated model which has th
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Crane, D. (1972). Invisible College
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discourse does not mean that it is
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Figure 2 Communities within the lay
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The major services classified are:-
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Spears, R. and Lea, M. (1994). Pana
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presents relevant items to the user
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ProFusion's main process creates mu
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Managing Interdisciplinary Project
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influencing the study. To ensure th
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ANALYSIS The introduction of new co
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to be combined; this integration ac
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On receiving the information that a
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4.1.4 SPS-SCS delivery system This
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Aster Servers - How to make Aster m
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Another approach we have tested as
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information available on the web. W
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Project Based Learning - Global Vil
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http://www.ncsa.uiuc.edu/SDG/Softwa
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Web. It is tailored to the needs of
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Views of the Solar System - http://
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Gatherers and Brokers. The Gatherer
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(Uniform Resource Locators) are pre
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References Figure 6: Document Displ
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The RealAudio (http://www.realaudio
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For educators, this combination of
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The practical components of this pr
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typologize communication and media
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egistration pattern (in the reverse
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the Internet, in terms of informati
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Fig. 10: 3-dimensional pattern matr
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structure of the courses adheres to
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applications manage chat sessions,
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6. Evaluation Figure 4: Example
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Introduction Windows to the Univers
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Figure 1: The main navigation panel
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Our Planet Interior & Surface Atmos
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I. Introduction What is a browser?
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(1) [Baggett, Ehrenfeucht, & Guzdia
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Node display. In addition to enforc
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On-demand Multi-lingual Font Servic
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One of the advantages by using Java
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The directory can be an alias defin
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Real Audiences—Worldwide: A Case
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outstandingly successful authors re
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usually jumps over the keyboard --
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Introduction Web Conceptual Space R
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conceptual knowledge processing, kn
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and the 'Top' view for all applicat
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An Information Broker for Adaptive
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the worst case, we can make a rough
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These simple parameters significant
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[Weider 96] Weider, C. , Fullton, J
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experiments, listen to sound, run l
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The administration and management s
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Educational packages: the current i
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Embedded Interactive Concept Maps i
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eading and understanding informal c
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Every Smart Ideas document has a de
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and used an index into the HTML doc
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Introduction Building Internet-Base
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comments from others or newly assig
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Figure 3: Author profile Conclusion
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The major features are: Figure 1 Me
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Figure 3 FrameMaker requirements do
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5 Conclusions This article has pres
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On-the-Fly Web Pages Minus the HTML
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Scannell, Ted (1996). Steve Jobs In
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originator. Thus, the collaborative
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preferences, circumstances and task
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development concerns the previously
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Abstract: Aspects of Large World Wi
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Structuring data The unstructured a
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say on a LAN with a hypermedia serv
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Halasz, 1988 Halasz, F. (1988). Ref
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One of the CNES' goals is to make s
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Archived Files Start Time 1 End Tim
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HELP-EXCHANGE: An Arbitrated System
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Since the Help-Exchange system is e
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system avoids spamming since the qu
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From a Set of Technical Documents t
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“The machine that would perform t
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In the case of the link with commen
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[Glushko 89] Glushko, R. (1989). De
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• SWOOP [Hunter et al. 95] provid
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also planned for implementing this
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storage structures already establis
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Every S-collection (instance) has a
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do not map S-collections onto a glo
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The operator JOIN is applied to a c
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Internet India Suzanne McMahon Univ
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published in Bombay, includes shopp
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INDIA-E@INDNET.BGSU.EDU Economic Fo
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Instructional Materials The first c
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Reminder Robot For the Q&A section
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[Wusage 1994] Cold Spring Harbor La
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succeed, is also social in origin,
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Other ships may also appear on the
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An Intelligent Tutoring System on t
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Figure 1. Viewer Control Mechanism
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input and clickable map as the ways
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Designing Digital Libraries for Pos
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Layer HOSS allows an open set of st
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Page 409 and 410: [Chartier 1994] Chartier, R. (1994)
Page 411 and 412: much of the value on the Net “wil
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Page 415 and 416: Bundling has been studied extensive
Page 417 and 418: The software industry relies on dif
Page 419 and 420: that is not accepted by society exi
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Page 423 and 424: European Economic Area agreement. S
Page 425 and 426: Figure 2: Components of the learnin
Page 427 and 428: 5. Concluding Remarks Figure 4: The
Page 429 and 430: A Distance Education How-To Manual:
Page 431 and 432: usually required. This can take pla
Page 433 and 434: piece, or of the whole piece. A CD
Page 435 and 436: Indexes, Keys: these tables define
Page 437 and 438: following, we discuss basic types o
Page 439 and 440: long: in the music database, the co
Page 441 and 442: The MARBLE 1 Project: A Collaborati
Page 443 and 444: available, as described above, help
Page 445 and 446: Feedback and Analysis Fig 2: Extrac
Page 447 and 448: Open Net and the Australian On-Line
Page 449 and 450: speeds, download times, changing br
Page 451 and 452: our audience, fall into one of the
Page 453 and 454: server change. When we had our own
Page 455 and 456: Structuring and classification of d
Page 457: would not have the rights to change
Page 461 and 462: WebGrid: Knowledge Elicitation and
Page 463 and 464: annotation form shown in Figure 2 t
Page 465 and 466: Figure 4 WebGrid form for rating el
Page 467 and 468: Figure 7 Main status screen of WebG
Page 469 and 470: As a final element, the realtor has
Page 471 and 472: WebGrid provides many additional fa
Page 473 and 474: Media, Multimedia and Meaningful La
Page 475 and 476: One question which arises in a disc
Page 477 and 478: about the medium. In studies in whi
Page 479 and 480: Schwerin advocates mediation as “
Page 481 and 482: The wider implications of this perc
Page 483 and 484: Internet, that quality may be seen
Page 485 and 486: The most frequently discussed probl
Page 487 and 488: 3.2 Developer viewpoint A MicroWeb
Page 489 and 490: We anticipate that the complete Mic
Page 491 and 492: Database for employment information
Page 493 and 494: Figure 1 System Structure Figure 2
Page 495 and 496: Figure 5(b) Results of Searching
Page 497 and 498: ClassNet is a CGI-Script running un
Page 499 and 500: Current Uses Dr. Doug Yarger at Iow
Page 501 and 502: Introduction Modelling Alter Egos i
Page 503 and 504: Let us further suppose that the cyb
Page 505 and 506: • NEC to indicate that the action
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[vdRiet 95] R.P. van de Riet, A. Ju
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or "anchors." The anchors are stori
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Figure 1: Excerpt from SMART WWWeb
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there is less dissolved oxygen in t
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CS20 will provide students with new
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EPIC : Building a Structured Learni
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expects. The EPIC exercises are emb
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interactive courses around Scotland
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This paper begins by briefly survey
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must supply such information, the s
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Building the collection The lowest
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size is bounded by the size of a st
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the choice should be. It may be tha
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Introduction Supporting Provision a
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A visual resource base comprises a
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• Web browser: It performs the se
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POSTER / DEMONSTRATION
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integration of presentations create
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Science Technology Entry Program: I
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ID Comm: Building a Virtual Communi
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Preservice Teacher Education and th
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Un Meurtre a Cinet (Un homicidio en
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The Human Brain: A Frames-based Ima
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Collaborative Learning/Teaching on
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SHORT PAPERS
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system look for email from the mail
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Converting a Large Introductory Cou
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Bringing Instructional Design Princ
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Watermarking for the HyperWave Hype
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Impact of the Introduction of Web-B
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Owen, J.M. (1993). Program Evaluati
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(d) Low cost to students (e) Easier
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Introduction Robots And The Web: An
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Figure 2. BargainBot Search Results
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Conclusions and Future Work Figure
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Introduction Active Messaging in Ja
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Acknowledgments The authors would l
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The effective development of web-ba
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telecollaboration. This work aims t
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Introduction Internet for Teachers:
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Creating Educational Webmasters: Cy
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Acknowledgments I would like to tha
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The College of Human Ecology, which
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The screen dumps below show a large
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can also open and close levels of t
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Venice and Vienna, iconographic col
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Introduction: Cyberschool - Singapo
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1. Overview US Information Superhig
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Collaborative Design: A Cognitive A
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A Web Based Decision Support System
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addition to participating in teache
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communication between students, bet
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• Exploring Libraries introduces
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Design for Web-Based Learning Phili
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The effin factor concerns the appea
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Introduction The Web is not a Distr
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WEB-EDD: Electronic Document Delive
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Walker, G. L. & Thoma, G. R. (1995)
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3. Evaluation of Link Annotation fo
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Based on the needs addressed above,
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The Presentational use of the inter
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named-thing2(thing-type (parameters
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Integrating the use of the Web into
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linking within the web page is also
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Providing Medical Education Resourc
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logons by PPP/home access, Informat
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indeed create considerable turbulen
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Introduction Homeland: An Integrate
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[Frega and Volpentesta 94] Frega N.
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Summary: Our culture often thinks o
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Implementing Engineering Education
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Reorganised by the Web: Bringing th
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content providers--collaborative te
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Table 1: Sample items from the BEM
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Health Care Information on the Web:
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Abstract Shame and War Revisited Ad
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left to do? Style sheets don't let
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In this case, the Los Alamos Nation
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Differing Cultures: Bringing Minds
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Web of Thought: Ways to Make the Wo
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On Teaching and Collaborative Devel
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I.- History Distance Education on D
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But there is much more to this pict
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in Treemaps. In contrast, the Docuv
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Figure 2: Webview The Webview is us
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Figure 3: Intradocument View showin
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Using a WWW Server to Access and Ma
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W3Client Figure 1 : The Co-Learn WW
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Avoiding Vendor Lock-in: An Open Ap
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Web Courses for Northern B.C.: Virt
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Harvesting the Internet: Creating a
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School Participation in the Co-Deve
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a basic framework for adopting tech
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COMMUNITY WEB PROJECTS TO SUPPORT H
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Overview: Automatically Generated W
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Introduction Computer Aided Informa
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[Bloomfield 1994] Bloomfield, H. (1
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A Generic Learning Platform: From t
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etween Moscow and Western Europe, S
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Creating A Presence On The World Wi
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References [Hill 1993] Hill, Terry
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many of the students likewise had f
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DeRose, Steven and Durand, David, M
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{1} http://www.gfz-potsdam.de/drz/g
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significantly different. Analysis f
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3. The Web Based Solution Most CBT
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A Virtual Campus on the World Wide
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A unified NBCC-wide (and hopefully
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Start Your Search Engines! Authenti
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Observations on Web-Based Course De
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espond to at least four other discu
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examples of the many good discussio
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instructor intervention (to prevent
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Using the World Wide Web To Creativ
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In summary, the goals of the PTK ar
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like SGMLS or SP [Clark 95]. The WW
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All relevant information and links
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Introducation A Virtual Classroom i
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Introduction Put Your Experience on
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Domeshek, E.A. & Kolodner, J.L. 199
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• provide IP address • provide
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Incorporating World Wide Web techno
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1 Introduction Non-Invasive Improve
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The first author acknowledges CNPq
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order to make the students feel tha
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World Band: K-12 Music Education on
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PITS (Populated Information Terrain
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The big central landmark VRML Some
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SEEWeb - An Internet Solution Steve
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Archive.edu: A Storehouse of Classr
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[O’Haver 1995] O’Haver, M. (199
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Module Three The third module explo
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The development of a new journal ne
Page 777 and 778:
Implementation The tool is a Web-ba
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Providing Real Time Instruction on
Page 781 and 782:
first was a single free text field
Page 783 and 784:
the project as contributors of stud
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knowledge-acquisition have to be ac
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instead of contributing a lengthy r
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1. Introduction WWW3D: A 3D Multi-U
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6. Summary In this paper we have de
Page 793 and 794:
collaborative programs. At the same
Page 795 and 796:
and continued challenges of the pas
Page 797 and 798:
In order to cater for the this latt
Page 799 and 800:
Some lectures have pre-lecture assi
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Some Issues. T. of Japanese Society
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MENTOR: Internet Search Advisor and
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acquisition to be followed.- Repres
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Web in order to supplement the main
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When installed at the user end, stu
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These and other lessons learned hav
Page 813 and 814:
some other details about the enviro
Page 815 and 816:
Interactive Teaching Material for t
Page 817 and 818:
The applet is organised around two
Page 819 and 820:
esult, the new search queries not o
Page 821 and 822:
Introduction Distant Education Mate
Page 823 and 824:
Information. The Internet resources
Page 825 and 826:
1 Introduction The Virtual Universi
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on-line, an audio and/or video conn
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Finally, if you are preparing lesso
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The user accessing the database (at
Page 833 and 834:
Figure 2: The HTML page of Esther,
Page 835 and 836:
PANEL
Page 837 and 838:
TUTORIALS
Page 839 and 840:
Table of Contents 1 INTRODUCTION 1
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specifications like the Initial Gra
Page 843 and 844:
Low end digital cameras do not at a
Page 845 and 846:
To display images correctly the gam
Page 847 and 848:
• PCD: Photo Compact Disc. Kodak.
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3.1 Database Types There are differ
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There are a lot of (hierarchical) k
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the user. The drawback of dynamic c
Page 855 and 856:
types. These are used to restrict t
Page 857 and 858:
-18-
Page 859 and 860:
If you would like to modify the app
Page 861 and 862:
4.4 Database versus Information Ret
Page 863 and 864:
HARVEST [29,30] is a more complicat
Page 865 and 866:
• Access speed: 10% with 9,6 Kbit
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17. Proceedings of the 3rd Internat
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50. Poynton CA. Frequently Asked Qu
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