Self-Guided Demo

Contents

• DLSI Information
• Demo Notes
• Activities and Extensions Underway
• Self Guided Demo
• Acknowledgments

---

DLSI Information

Thank you for taking a look at our Digital Library Service Integration (DLSI) prototype. This is an initial proof-of-concept prototype that demonstrates DLSI's "lightweight" integration of digital library systems (i.e., integration through linking). DLSI is part of the National Science Digital Library

For more information, please see:

• DLSI Home Page
• Michael Bieber's Publication's Page (PI)
• Il Im's Home Page (Co-PI)
• Yi-Fang Wu's Home Page (Co-PI)

DLSI currently partially integrates the following systems:

• NSSDC: National Space Science Data Center (NASA Goddard Space Flight Center)
• Arizona Document Summarizer (University of Arizona, Nanoport project)
• AskNSDL (Syracuse University)
• Atmospheric Visualization Collection (Argonne National Labs)
• Earth Science Picture of the Day (Universities Space Research Association)
• MapQuest

---

Demo Notes

Please note that this is an early prototype using a combination of frames to display menus and documents, and pop-up windows to display the list of links generated.

• Sometimes the list of links will appear in the left-hand frame of the main window, instead of in a pop-up window.
• Currently most structural link anchors lead only to one external system. (This is not an inherent restraint, rather a consequence of not standardizing element type names.)
• Most of the systems have only been integrated preliminarily, and do not have a large number of generated link anchors or links yet.
• Link anchors found through "structural analysis" are displayed as blue "i" icons. Link anchors found through lexical analysis are displayed with red dots. Each will generate a separate list of links.
• The interface has not be optimized for user friendliness :-(
• If an integrated system is "down" you will see a JAVA exception error message. (Please choose the back button to return to the prior page.)
• If a system has changed its interface without notifying us, DLSI may not work for it until we update the integration.

---

Activities and Extensions Underway

We currently are working on the following activities.

• Developing a new prototype to fix several of the situations above, make the interface more flexible, and to adapt current standards.
• Using a semantic hierarchy to share "element types" so an element will have relevant links to several external systems.
• Integrating the current systems further.
• Evaluating DLSI.
• Integrating collaborative filtering to customize the list of links.

---

Self-Guided Demo

1. Log in to DLSI. URL: http://hynic.njit.edu/
   username: system
2. (the system may not require a password. Try leaving it blank. If that doesn't work, use the password: tester)
   
   
3. Click on the National Space Science Data Center (NSSDC) Master Catalog in the left-hand panel, and choose Spacecraft Query Form. This will lead you to the NSSDC system displayed within the main DLSI frame.
   
   
4. Enter part of the name of any space mission, such as "Ga" as short for "Galileo" as the spacecraft name and click on the submit button. This will issue the query to the NSSDC.
   • you could issue this query directly to the NSSDC (outside DLSI) to compare the results
     
     
5. The NSSDC returns the query results to DLSI. DLSI uses structural analysis to recognize two major types of elements: documents in the first column (listed under "Spacecraft Name") and launch dates in the third column. It marks each of these elements as link anchors with blue "i" icons.
   
   
6. Services for Elements of type "Launch Date"
   1. Click on the blue icon next to one of the launch dates. DLSI will generate a list of links to three services that the NSSDC provides for any launch date element. These are three queries to list all spacecraft launched on that date, launched during that month, and launched during that year.
      • This demonstrates direct access to additional services within a digital library system, without requiring the user to navigate to that service's starting location.
        
        
7. Services for Elements of type "Document"
   1. Click on the blue icon next to any document ("spacecraft name"). DLSI will generate a link that the University of Arizona provides for any document element. This leads to the Arizona Document Summarizer. Choose this link.
      • This demonstrates integration between the NSSDC and the Arizona Document Summarizer
   2. DLSI sends a command to the Arizona Document Summarizer, which summarizes the Apollo document in two sentences. The sentences are shown in the left-hand column. These are color coded to show their location within the original document in the right-hand column.
   3. Close the Summarizer and any list of links pop-up window still open (which may be hidden by the current window).
      
      
8. Lexical Services
   1. Click on the National Space Science Data Center (NSSDC) "Spacecraft Query Form" in the left-hand panel.
   2. Enter "Challenger" as the spacecraft name and click on the submit button. This will issue the query to the NSSDC.
   3. Click on the underlined link for "Apollo 17 Lunar Module/ALSEP" (not DLSI's blue icon). This opens the document in the main frame. DLSI's lexical analysis tool will mark any words recognized from a registered thesaurus or glossary as a link anchor with a red dot.
      • Link anchors from structural analysis are marked with blue "i" icons. Link anchors from lexical analysis are marked with red dots.
   4. Click on "Moon" within the Description paragraph. This will display a list of links for lexical analysis terms.
   5. Click on "Thesauri - See definitions".
   6. This will display the actual glossary/thesaurus entry. In this case it was found in the Medical Subject Headings (MeSH) glossary sponsored by the National Library of Medicine. Note that this entry was also processed by DLSI's lexical analysis.
   7. Close any list of links pop-up window still open (which may be hidden by the current window).
   8. Click on "Geography" in the glossary definition.
   9. Notice in the list of links that an additional link appears the EPOD (Earth Science Picture of the Day) system. Choose this link.
      • Note that the list of links may appear in the original DLSI window's left-hand frame instead of in a pop-up window.
   10. This leads to the EPOD system, which displays Earth Science pictures related to the term "geography".
       • This demonstrates integration between the NSSDC and the EPOD system
         
         
9. Services for Elements of type "Concept"
   1. Return to a DLSI screen with the original menus in the left-hand frame. Choose "Atmospheric Visualization Collection" (AVC) and then "Glossary". This brings you to an independent glossary from the AVC system. This is independent of DLSI's lexical analysis system.
      • You could look at AVC directly without the DLSI interface and links.
   2. DLSI uses structural analysis to mark all elements of type "concept" as link anchors. Choose any blue "i" icon. Choose "Ask an Expert".
   3. This automatically has logged you into the AskNSDL system (using one of DLSI's user IDs), navigated to the question-asking area, and started a question to an expert with the subject heading of term you selected from the AVC glossary.
      • At this point, do not actually continue asking a question, as this will really submit it to an expert to answer!
      • You could log into AskNSDL yourself and enter a question, after getting a NSDL user ID (you will be guided to do this).
      • This demonstrates integration between the AVC and AskNSDL systems
        
        
10. Services for Elements of type "Meteorological Instrument"
    1. To return to AVC, click on "SGP Quicklook Interface" under the Atmospheric Visualization Collection in the DLSI left-hand panel.
    2. Select the blue "i" icon for the weather instrument "mmcr". This displays several AVC services for a weather instrument. You can try any of these.
       • This demonstrates direct access to additional services within a digital library system, without requiring the user to navigate to that service's starting location.
         
         
11. Services for Elements of type "Meteorological Facility"
    1. Returning to any AVC "Quicklook Interface" window, click on the name of any weather instrument (not the DLSI icon). AVC displays a map showing the instrument's locations (marked with an orange dot). Click on one of these orange-dot locations. This displays links to services for a meteorological facility. Select the link "Display facility location on map". This sends the location to MapQuest to map.
       • This demonstrates integration between the AVC and MapQuest systems
         
         
12. Feel free to explore further, realizing that not all links are hooked up yet :-)

---

Acknowledgments

We wish to thank Hsinchun Chen and Byron Marshall at the University of Arizona; Gail Hodge (Information International Associates, Inc.), Janet Ormes and Walt Truszkowski at NASA's Goddard Space Flight Center; Chris Klaus at the Argonne National Labs; Ken Anderson at the University of Colorado at Boulder; Martin Ruzek at the Universities Space Research Association; and Joanne Silverstein, Jeff Rubin and Mark Frantz at the University of Syracuse and Internet Consulting Services, Inc. for their assistance in integrating their systems with DLSI. Anirban Bhaumik of OuterForce Systems helped design and implement the DLSI architecture. We gratefully appreciate partial funding support for this research by the United Parcel Service, NJIT, and the National Science Foundation under grants IIS-0135531 and DUE-0226075.