File:  [LON-CAPA] / nsdl / harvestsmete / cstc-122.xml
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Thu May 8 16:37:31 2003 UTC (19 years ago) by www
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SMETE side harvest code for LON-CAPA

<?xml version="1.0" encoding="UTF-8"?>

<ListRecords xmlns="http://www.openarchives.org/OAI/1.1/OAI_ListRecords" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/1.1/OAI_ListRecords http://www.openarchives.org/OAI/1.1/OAI_ListRecords.xsd">

<responseDate>2002-05-06T18:38:07-05:00</responseDate>
<requestURL>http://www.cstc.org:80/cgi-bin/OAI/CSTC.pl?verb=ListRecords&amp;metadataPrefix=ims1_2_1</requestURL>

<record>
<header>
<identifier>oai:CSTC:60</identifier>
<datestamp>1999-06-20</datestamp>
</header>
<metadata>
<lom xmlns="http://www.imsglobal.org/xsd/imsmd_v1p2" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsmd_v1p2 http://www.imsglobal.org/xsd/imsmd_v1p2p2.xsd">
   <general>
      <title><langstring xml:lang="en">Number System Conversion Tool</langstring></title>
      <catalogentry>
         <catalog>CSTC</catalog>
         <entry><langstring xml:lang="en">60</langstring></entry>
      </catalogentry>
      <language>English</language>
      <description><langstring xml:lang="en"> This tool uses JavaScript to implement a number system conversion tool that can be used to teach the concepts of different number systems as part of an introductory math or computer science course. Users can convert numbers from decimal to another base, and from other bases to decimal, and the conversion process is explained.
There is also a quiz feature which allows students to test their ability to convert numbers on their own.</langstring></description>
      <keyword>
         <langstring xml:lang="en">
         number system
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         binary
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         decimal
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         hexadecimal
         </langstring>
      </keyword>
   </general>
   <lifecycle>
      <status>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Final</langstring></value>
      </status>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Chaya Gurwitz
N:Gurwitz;Chaya
EMAIL;INTERNET:gurwitz@sci.brooklyn.cuny.edu
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>1999-06-20</datetime>
         </date>
      </contribute>
   </lifecycle>
   <metametadata>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Creator</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Chaya Gurwitz
N:Gurwitz;Chaya
EMAIL;INTERNET:gurwitz@sci.brooklyn.cuny.edu
ORG:Brooklyn College;Computer and Information Science
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>1999-06-20</datetime>
         </date>
      </contribute>
      <language>en</language>
   </metametadata>
   <technical>
      <location type="URI">
      http://www.cstc.org/cgi-bin/show_abstract.pl?type=official&amp;number=60
      </location>
      <requirement>
         <type>
            <source><langstring xml:lang="x-none">CSTC</langstring></source>
            <value><langstring xml:lang="x-none">Platform</langstring></value>
         </type>
         <name>
            <source><langstring xml:lang="x-none">CSTC</langstring></source>
            <value><langstring xml:lang="x-none">HTML Browser</langstring></value>
         </name>
      </requirement>
   </technical>
   <educational>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Learner</langstring></value>
      </intendedenduserrole>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Teacher</langstring></value>
      </intendedenduserrole>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Higher Education</langstring></value>
      </context>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Secondary Education</langstring></value>
      </context>
   </educational>
   <rights>
      <description><langstring xml:lang="en"></langstring></description>
   </rights>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Educational Objective</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computer Science Curriculum</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Numerical and Symbolic Computation</langstring></entry>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The type of class that this resource is best suited for</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">General Literature</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">General</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Hardware</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">General</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
</lom>
</metadata>
</record>
<record>
<header>
<identifier>oai:CSTC:4</identifier>
<datestamp>2001-09-06</datestamp>
</header>
<metadata>
<lom xmlns="http://www.imsglobal.org/xsd/imsmd_v1p2" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsmd_v1p2 http://www.imsglobal.org/xsd/imsmd_v1p2p2.xsd">
   <general>
      <title><langstring xml:lang="en">HSU CIS 492 - Project for a Senior-level Team Database Programming Course (a CIS senior capstone course)</langstring></title>
      <catalogentry>
         <catalog>CSTC</catalog>
         <entry><langstring xml:lang="en">4</langstring></entry>
      </catalogentry>
      <language>English</language>
      <description><langstring xml:lang="en"> This is a senior project for a senior-level Computer Information Systems capstone course. It is a team project, writing a large database project using Oracle.</langstring></description>
      <keyword>
         <langstring xml:lang="en">
         team programming project
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         database programming project
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         software engineering
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         senior capstone course project
         </langstring>
      </keyword>
   </general>
   <lifecycle>
      <status>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Final</langstring></value>
      </status>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Sharon Tuttle
N:Tuttle;Sharon
EMAIL;INTERNET:st10@axe.humboldt.edu
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-09-06</datetime>
         </date>
      </contribute>
   </lifecycle>
   <metametadata>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Creator</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Sharon Tuttle
N:Tuttle;Sharon
EMAIL;INTERNET:st10@axe.humboldt.edu
ORG:Humboldt State University;Computing Science
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-09-06</datetime>
         </date>
      </contribute>
      <language>en</language>
   </metametadata>
   <technical>
      <location type="URI">
      http://www.cstc.org/cgi-bin/show_abstract.pl?type=official&amp;number=4
      </location>
   </technical>
   <educational>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Learner</langstring></value>
      </intendedenduserrole>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Teacher</langstring></value>
      </intendedenduserrole>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Higher Education</langstring></value>
      </context>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Secondary Education</langstring></value>
      </context>
   </educational>
   <rights>
      <description><langstring xml:lang="en"></langstring></description>
   </rights>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Educational Objective</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computer Science Curriculum</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Database and Information Retrieval</langstring></entry>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The type of class that this resource is best suited for</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Educational Objective</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computer Science Curriculum</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Software Methodology and Engineering</langstring></entry>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The type of class that this resource is best suited for</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Software</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">Software Engineering</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Software</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">Miscellaneous</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Information Systems</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">Miscellaneous</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
</lom>
</metadata>
</record>
<record>
<header>
<identifier>oai:CSTC:158</identifier>
<datestamp>2001-08-21</datestamp>
</header>
<metadata>
<lom xmlns="http://www.imsglobal.org/xsd/imsmd_v1p2" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsmd_v1p2 http://www.imsglobal.org/xsd/imsmd_v1p2p2.xsd">
   <general>
      <title><langstring xml:lang="en">Reusability and adaptability of interactive resources in web-based educational</langstring></title>
      <catalogentry>
         <catalog>CSTC</catalog>
         <entry><langstring xml:lang="en">158</langstring></entry>
      </catalogentry>
      <language>English</language>
      <description><langstring xml:lang="en"> The production of interactive multimedia content is in most cases an expensive task in terms of time and cost. Hence, optimizing production by exploiting the reusability of interactive multimedia elements is mandatory. Reusability can be triggered by a combination of resuable multimedia components and the appropriate use of metadata to control the components as well as their combination.
In this article, we discuss the reusability aspects of interactive multimedia content in web-based learning systems. In contrast to existing approaches, we extend a component-based architecture to build interactive multimedia visualization units with the use of metadata for reusability and customizability.
In the three-tier model, the lowest layer of the paradigm corresponds to the programmer (code reusability). The user interface of an educational visualization is located at the top layer where the interaction with the end-user (student) takes place. The educator is located between the top and the bottom layers. This medium layer allows adapting interactive multimedia content according to the needs of the user, applying a predefined set of metadata. The teacher can both adjust the level of explanation and the level of interactivity of an animation, and influence the presentation and the results of the algorithms being illustrated (program reusability). After a theoretical overview, we explain our architecture by giving an example of an application.</langstring></description>
      <keyword>
         <langstring xml:lang="en">
         Design
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         Theory
         </langstring>
      </keyword>
   </general>
   <lifecycle>
      <status>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Final</langstring></value>
      </status>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Abdulmotaleb El Saddik
N:El Saddik;Abdulmotaleb
EMAIL;INTERNET:-
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-08-21</datetime>
         </date>
      </contribute>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Stephan Fischer
N:Fischer;Stephan
EMAIL;INTERNET:-
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-08-21</datetime>
         </date>
      </contribute>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Ralf Steinmetz
N:Steinmetz;Ralf
EMAIL;INTERNET:-
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-08-21</datetime>
         </date>
      </contribute>
   </lifecycle>
   <metametadata>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Creator</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Hussein Suleman
N:Suleman;Hussein
EMAIL;INTERNET:hussein@vt.edu
ORG:;
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-08-21</datetime>
         </date>
      </contribute>
      <language>en</language>
   </metametadata>
   <technical>
      <location type="URI">
      http://www.cstc.org/cgi-bin/show_abstract.pl?type=official&amp;number=158
      </location>
   </technical>
   <educational>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Learner</langstring></value>
      </intendedenduserrole>
      <intendedenduserrole>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Teacher</langstring></value>
      </intendedenduserrole>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Higher Education</langstring></value>
      </context>
      <context>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Secondary Education</langstring></value>
      </context>
   </educational>
   <rights>
      <description><langstring xml:lang="en"></langstring></description>
   </rights>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Educational Objective</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computer Science Curriculum</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Software Methodology and Engineering</langstring></entry>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The type of class that this resource is best suited for</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Information Systems</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">Information Interfaces and Presentation</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
   <classification>
      <purpose>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Discipline</langstring></value>
      </purpose>
      <taxonpath>
         <source><langstring xml:lang="en">ACM Computing Classification System</langstring></source>
         <taxon>
            <entry><langstring xml:lang="en">Computing Milieux</langstring></entry>
            <taxon>
               <entry><langstring xml:lang="en">Computers and Education</langstring></entry>
            </taxon>
         </taxon>
      </taxonpath>
      <description><langstring xml:lang="en">The subject classification that best describes the resource</langstring></description>
   </classification>
</lom>
</metadata>
</record>
<record>
<header>
<identifier>oai:CSTC:103</identifier>
<datestamp>2001-09-06</datestamp>
</header>
<metadata>
<lom xmlns="http://www.imsglobal.org/xsd/imsmd_v1p2" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsmd_v1p2 http://www.imsglobal.org/xsd/imsmd_v1p2p2.xsd">
   <general>
      <title><langstring xml:lang="en">Turing Machine Applet</langstring></title>
      <catalogentry>
         <catalog>CSTC</catalog>
         <entry><langstring xml:lang="en">103</langstring></entry>
      </catalogentry>
      <description><langstring xml:lang="en"> The following Java applet animates a Turing Machine that can add or multiply numbers. The animation shows the flow of events in the calculation (the writing and reading of symbols on an endless tape) and the decision rules used to process each step in the calculation.</langstring></description>
      <keyword>
         <langstring xml:lang="en">
         turing
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         machine
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         addition
         </langstring>
      </keyword>
      <keyword>
         <langstring xml:lang="en">
         multiplication
         </langstring>
      </keyword>
   </general>
   <lifecycle>
      <status>
         <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
         <value><langstring xml:lang="x-none">Final</langstring></value>
      </status>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Alan Sommerer
N:Sommerer;Alan
EMAIL;INTERNET:forrest@warthman.com
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-09-06</datetime>
         </date>
      </contribute>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Author</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Forrest Warthman
N:Warthman;Forrest
EMAIL;INTERNET:forrest@warthman.com
END:vCard
</vcard>
         </centity>
         <date>
            <datetime>2001-09-06</datetime>
         </date>
      </contribute>
   </lifecycle>
   <metametadata>
      <contribute>
         <role>
            <source><langstring xml:lang="x-none">LOMv1.0</langstring></source>
            <value><langstring xml:lang="x-none">Creator</langstring></value>
         </role>
         <centity>
            <vcard>
BEGIN:vCard
FN:Vikram Narula
N:Narula;Vikram
EMAIL;INTERNET:vnarula@vt.edu
ORG:Virginia Tech;CS
END:vCard
</vcard>
         </centity>
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<identifier>oai:CSTC:72</identifier>
<datestamp>1999-09-22</datestamp>
</header>
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      <description><langstring xml:lang="en"> JFLAP is a package of graphical tools which can be used as an aid in learning the basic concepts of Formal Languages and Automata Theory. The 3.1 version of JFLAP is written in Java using JDK 1.2 and JDK 1.1.5 and contains several new features and bug fixes.
Using JFLAP, one should be able to design and simulate several variations of finite automata (FA), pushdown automata (PDA), one-tape Turing machines (TM) and two-tape Turing machines (TTM). The user draws the transition diagram of the desired automaton and, once the picture is complete, the user enters an input string and then "runs" the automaton, being able to view all the generated configurations. In addition, JFLAP can handle grammars(GRM) and regular expressions(REX).</langstring></description>
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<record>
<header>
<identifier>oai:CSTC:76</identifier>
<datestamp>2001-09-06</datestamp>
</header>
<metadata>
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         testing
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         student work
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<record>
<header>
<identifier>oai:CSTC:94</identifier>
<datestamp>2000-09-26</datestamp>
</header>
<metadata>
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      <title><langstring xml:lang="en">Simulation of the 1-Dimensional Discrete Cosine and Fourier Transforms</langstring></title>
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      <description><langstring xml:lang="en"> This applet belongs to the context of Multimedia or Signal Procesing. It simulates the one dimensional discrete cosine transform and the one dimensional discrete Fourier transform. Both transforms are a basis for modern signal processing algorithms like the JPEG image compression standard. When confronted with the mathematical formulas, most students show difficulties in understanding the notion of "time domain" and "frequency domain", or of "superposition of different frequencies". The applet simulates the transformation of a 1 dimensional signal. The amplitudes of the different frequency components can be modified, and the effect on the signal will get clearer. The user interface of the applet has been built to stimulate the user to play around with the tool. The applet is highly interactive and very flexible. One can choose between a number of given input signals or the user can build a signal by himself. Of course, a solution for every input is provided.</langstring></description>
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for video (Motion JPEG, H.261, H.263) are based on the Discrete Cosine Transform (DCT) which splits an image up into blocks of 8x8 pixels. Our applet tries to clear out the problems with the 2 dimensional DCT by invoking the "play instinct" of students: The user can chose discrete 8x8 (2-D) input values in the range 0 to 255 for the grey value of the pixels. In the
frequency domain, rulers allow to adjust the amplitudes of the different frequencies. A backward transform plots the resulting grey values from the chosen ampitudes over the initial input values. The task is to find the "correct" amplitudes in the frequency domain to recover the initial signal. Of course, we have included a solution to the problem...</langstring></description>
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<record>
<header>
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<datestamp>2001-09-06</datestamp>
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The Edsac simulator is a faithful software evocation of the EDSAC computer as it existed in 1949-51. The user interface has all the controls and displays of the original machine, and the system includes a library of original programs, subroutines, and debugging software. The simulator is intended for use in teaching the history of computing; as a tutorial introduction to the classic "von Neumann" computer; or as an historical experience for current computer practitioners.</langstring></description>
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         2001 ACM International Student Research Contest
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         first Place Undergraduate
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         1st Place Undergraduate
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      <description><langstring xml:lang="en"> Computer networks and distribute systems are characterized by highly dynamic, concurrent, and complex processes. Thus, training in this area requires great effort from both teachers and learners.
Teachers are disatisfied with available methods for presentation, explanation, and exercises, and they
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We have developed and architecture called Highly interactive simulation of algorithms and Protocols (HiSAP), consisting of a framework to build simulations and generate applets from formally specified algorithms or protocols. By modifying this specification and observing the resulting behavior, teaching and learning in a constructive manner is enabled. The framework is open to plug-in tools to show various aspects of HiSAP's behavior.
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      <description><langstring xml:lang="en"> Authors: Prakash Ojha Abigail Walker Jennifer Wanner
Hope College Xavier University
Computer Science Mathematics and Computer Science
Holland MI 49423 Cincinnati OH 45207-4441
ojha@cs.hope.edu awalker@cerebro.xu.edu wanner@cerebro.xu.edu
Research advisor: Gary Lewandowski, Xavier University,
lewandow@cerebro.xu.edu
Poster Title: Empirical Study of Course Scheduling Methods
Category: Undergraduate
Extended Abstract:
Problem and Motivation
Course scheduling involves building a timetable for courses such that
the students who want to take courses can successfully take every
course they would like. There are many variations to this problem,
including inclusion of faculty constraints, room constraints, and
multiple sections. The problem is known to be NP-Complete, thus many
researchers have worked on approximation solutions to the problem.
Researchers have generally focused on one solution method, one
unique version of the problem definition, and one set of data based on
local needs. This localization of the problem has resulted in many
studies but no general consensus of the best method available.
In this study, we explore several methods from the literature on a single
definition of the problem, and on a common set of data. Our goals are
two-fold. First, we provide a problem statement, data, and a random
data generator to facilitate easy benchmarking of methods and techniques.
Second, we explore the best method for those who may be non-experts
and need to schedule courses.
Background and Related Work
While a great deal of research has been done on scheduling methods,
our study concentrates on two of the most promising efforts:
iterative improvement and linear programming. Iterative improvement
methods for scheduling including faculty constraints have been studied
in particular by Glover [3], and Chahal and DeWerra [1]. Hertz's use
of Tabu search considers many different constraints [4]; we have
adopted many of these constraints in our benchmark formulation of the
problem. Our modification to the problem and our new data provides a
different testbed for this algorithm and allows it to be compared
against other methods. Linear programming allows one to formulate an
equation for the optimal solution to the problem; practical solutions
involving this method are infrequent [2], and do not consider many of
the constraints we consider.
Approach and Uniqueness
We address the problem of comparing results from the literature in two
ways. First, we define one statement of the course scheduling problem,
involving faculty, students, and multiple sections, and adapt several of
the approaches from the literature to this problem. Thus, any comparison
of the approaches will start from the same problem definition. Second,
we provide a random data generator that generates student course
requests in such a way that an optimal solution must exist. Finally, we
have studied five methods for course scheduling in our study: A greedy
algorithm that simply schedules courses to the first available time
(results from this simple method give some idea as to the usefulness
of more complex methods), iterative improvement algorithms following a
hill-climbing philosophy and following a "random improvement" philosophy
in which a solution with a poorer evaluation may be used to continue the
search for an improved solution, linear programming, and an algorithm that
creates a bipartite matching problem for scheduling each student based on
the times available for each course requested.
Our formulation of the course scheduling problem used is as follows:
We are given information about the courses (number of sections,
faculty members teaching the course, times at which the course can be
taught), lists of desired student courses, and the number of timeslots
in which to schedule the courses. Courses are grouped into departments
and for each department we have information on how many courses from
that department may be scheduled concurrently (representing room
availability constraints). The goal of the problem is to build a
timetable and schedule for students' courses minimizing student
conflicts while satisfying constraints on faculty and room availability.
This study provides a repeatable and expandable comparison of scheduling
methods. The algorithms were tested on random data and on data from a
DIMACS benchmark for graph coloring that involves course scheduling.
The generator and benchmark data are publically available, thus other
methods can be tested on the same or very similar data.
Results and Contributions
We have developed a data generator that generates student course requests
given the description of a timetable (the number of courses in the table,
and the number of sections of each course), the section bound for each
course, and the number of schedules desired. The generator builds a random
timetable, and then generates student course requests using a backtracking
technique that ensures the student can get each course requested. Information
on which section the student would attend and the time of each course is
stripped from the data so the data appears real to the algorithms.
We conducted a study of the methods described above on thirteen sets
of randomly generated data. Each method was run five times and we used
the median to compare how close each method comes to scheduling courses
optimally. (The Linear Programming method could not be tested because
our formulation resulted in so many variables that our machines ran out
of memory.)
We have drawn the following conclusions from our empirical study. First,
the greedy algorithm is not competitive with other approximation methods,
meaning the time spent developing and using these methods is worthwhile.
Second, iterative improvement is currently the best practical method for
course scheduling when the courses have only a single section each. Third,
when courses have multiple sections each, bipartite matching is very
competitive with the iterative improvement algorithms while running much
faster.
References
[1] N. Chahal and D. deWerra. An interactive system for constructing
timetables on a PC, European Journal of Operations Research, 40, 1989, 32-37.
[2] T. Franklin, E. Jenkins, and K. Woodson. A case study in scheduling
courses, UMAP Journal, 15, no. 2, 1995, 115-122.
[3] F. Glover, Tabu Search, part 1, ORSA Journal on Computing,1,1989, 190-206.
[4] A. Hertz. Finding a feasible course schedule using tabu search,
Discrete Applied Mathematics, 35, 1992, 255-270.</langstring></description>
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      <description><langstring xml:lang="en"> &lt;p&gt;In the last few years the (semi-) automatic sequencing of course material has become an important research issue, particularly the standardization of metadata for educational resources. Sequencing can help to generate hypermedia documents which, at their best match the learner's needs. To perform (semi-) automatic course sequencing, a knowledge library as well as modular resources can be used. Both must be described by metadata.&lt;/p&gt;
&lt;p&gt;First, metadata standards (IEEE Learning Objects Metadata, Instructional Mangement Systems Global Learning Consortium, Dublin Core) are analyzed with regard to course sequencing. As an application example, Multibook, an adaptive hypermedia system used to teach multimedia technology, is described. Multibook uses metadata to create course sequences semi-automatically. In this article we explain how a knowledge library can be used to create exercises automatically. We give an example of how courses can be sequenced in general by analyzing the creation of exercises. An evaluation of our system shows the advantages and drawbacks of the automatic sequencing approach.&lt;/p&gt;</langstring></description>
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<identifier>oai:CSTC:160</identifier>
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      <title><langstring xml:lang="en">Using a theoretical multimedia taxonomy framework</langstring></title>
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      <description><langstring xml:lang="en"> &lt;P&gt;Multimedia (MM) is a polysemous term, a term with many definitions, and in this case, many roots. In this paper, multimedia is defined as the seamless integration of two or more media. Each ancestor brings another requirement, muddying the field and making it difficult to work through. A multimedia taxonomy based on a previous media taxonomy is proposed to help organize the discipline. The taxonomy helps to classify the space called multimedia and to draw attention to difficult issues. The paper outlines the forms contributing to multimedia--text, sound, graphics, and motion--and aligns them with probable formats--elaboration, representation, and abstraction-- and sets them within a context--audience, discipline, interactivity, quality, usefulness, and aesthetics. The contexts are more clearly defined in two areas: interactivity and the information basis for a discipline. Examples are presented describing the use of the taxonomy in the design and evaluation of student projects in a computer science-based multimedia course.&lt;p&gt;</langstring></description>
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         computer uses in education
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<header>
<identifier>oai:CSTC:161</identifier>
<datestamp>2002-02-22</datestamp>
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      <title><langstring xml:lang="en">L3--towards an open learning environment</langstring></title>
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      <language>English</language>
      <description><langstring xml:lang="en"> &lt;P&gt;This article describe the use of dedicated ontology for teaching in the context of the &lt;I&gt;L&lt;/i&gt;&lt;SUP&gt;3&lt;/sup&gt; project, a national joint project for deploying further vocational education in Germany. The requirements for the open &lt;I&gt;L&lt;/i&gt;&lt;SUP&gt;3&lt;/sup&gt; learning infrastructure are presented in order to motivate our approach to metamodeling learning resources and services by using dedicated ontolgies of pedagogics and didactics. The basic concepts and parts of the pedagogical ontology are outlined, and the practical implications for several of today's problems such as authoring and design, retrieval and adaptive of training resources are illustrated. An overview of the &lt;I&gt;L&lt;/i&gt;&lt;SUP&gt;3&lt;/sup&gt; runtime architecture shows how the didactical ontology is used to deliver adaptive learning.&lt;/p&gt;</langstring></description>
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         adaptive courses delivery
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         authoring
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         reuse of learning resources
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         human factors
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      <description><langstring xml:lang="en"> &lt;P&gt;We used our Original Interactive Remote Instruction (IRI) system to teach scores of university classes over the past years at sites up to 300 km apart. While this system is a prototype, its use in real classes allows us to deal with crucial issues in distributed education instruction systems. We describe our motivation and vision for a reimplementation of IRI that supports synchronous and asynchronous distance education. This new version, called IRI-h (h for hetergeneous), is coded in Java and executes on several different platforms. IRI-h extends IRI both to multiple platforms and heterogeneous network experiences with the developing prototype, including preliminary performance evaluation, and also unresolved issues still to be addressed.&lt;/P&gt;</langstring></description>
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      <description><langstring xml:lang="en"> &lt;P&gt;Many educational resources and objects have been developed as Java applets or applications, which can accessed by simply downloading them from various repositories. It is often necessary to share these resources in real time, for instance when an instructor teaches remote students how to use a certain resource explains the theory behind it. We have developed some tools for this purpose that emulate a virtual classroom, and are primarily designed for synchronous sharing of resources. They enable participants to share Java objects in real time and also allow the instructor to dynamically manage the telebearing session.&lt;/P&gt;</langstring></description>
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<identifier>oai:CSTC:180</identifier>
<datestamp>2001-10-30</datestamp>
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      <description><langstring xml:lang="en"> This work describes the design and implementation of a simulation
environment for an open-source embedded kernel and an intuitive
user interface to complement it. The study stresses the suitability of
POSIX Threads (Pthreads) to resemble kernel operations in the
simulation environment. It specifies the prerequisites for using
Pthreads as a means to resemble embedded task execution and suggests an
I/O-based representation of device information. The experience gained
with a sample implementation stresses the importance of a proper match
between a Pthreads implementation and an embedded kernel. It
also shows the adequacy of both the simulation environment and a
graphical user interface to aid program development and
debugging. Furthermore, the separation of the simulation component
from the user interface provides opportunities to utilize each
component separately or even combine them with other components.
The simulation environment is publically available with further
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         Embedded Systems
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EMAIL;INTERNET:davereed@creighton.edu
ORG:;
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