Mapping Knowledge Domains (2004) / Chapter Skim
Currently Skimming:
User-controlled mapping of significant literatures
User-controlled mapping of significant literatures
Pages 115-120
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 115... ...
Given a single input term from a user, a medical subject heading, a cocited author, or a cocited journal, PNAStINK rapidly displays views in which that term and the other 24 terms that most frequently co-occur with it in a bibliographic database are interrelated in ways suggesting fruitful combinations for document retrieval. The interrelationships are produced by two algorithms, pathfinder networks and Kohonen-style self-organizing maps.
|
From page 116... ...
Contrasting styles of literature mapping Global Localized . Designer initiated Full matrix mapped Map created before inquiry Creation time: hours Labeling Reemphasized Explore by relocating on map User initiated Small subset of matrix mapped Map created by inquiry Creation time: seconds Labeling emphasized Explore by generating new map Surface objects not manipulable Surface objects manipulable User is visitor User is wielder Wh ite et a/.
|
From page 117... ...
That is, if a user supplies the name of a seed journal, such as Gut or Cell, PNASLINK maps the top 24 journals cocited with it in PNAS. Journal maps are most likely to be of interest to professional literature managers, such as serials librarians, whereas maps of MeSH and cocited authors are intended more for users in general.
|
From page 118... ...
They are a softer-focus kind of mapping than PFNETs, but they, too, suggest specific combinations of terms on which the user might want to base retrievals. The PNASLINK algorithm extracts the proximity relations of data in 25 dimensions, one for each of the input terms paired with all others, and seeks to preserve them as closely as possible in 2D.
|
From page 119... ...
mapping will be neither beginners nor subject experts, but "in-between" persons, such as librarians, subject indexers, science writers, journal editors, and teachers as they browse the many research areas to which they come as outsiders. Slatkin found his own cocited author maps readily interpretable.
|
From page 120... ...
(1995) A Relational Metric, Its Application to Domain Analysis, and an Example Analysis and Model of a Remote Sensing Domain, National Aeronautics and Space Administration Technical Memorandum 119358 (Ames Research Center, Moffett Field, CA)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.