Today, user-generated tags are a common way of navigating and organizing collections of resources. However, their value is limited by a lack of explicit semantics and differing use of tags between users. Clustering techniques that find groups of related tags could help to address these problems. In this paper, we show that a Self-Organizing Map (SOM) can be used to cluster tagged bookmarks. We present and test an iterative method for determining the optimal number of clusters. Finally, we show how the SOM can be used to intuitively classify new bookmarks into a set of clusters.
Thursday, October 08, 2009
Tag Clustering with Self Organizing Maps by Marco Luca Sbodio and Edwin Simpson is a recent HP Labs Technical Report.
The next NISO Open Teleconference will be October 13, 2009. Rob Walsh, President of EnvisionWare (Maintenance Agency for NCIP), will be providing an update from the NCIP Standing Committee.
Join NISO on these free conference calls to learn about new projects within NISO as well as to provide the organization with feedback and input on areas where NISO ought to be engaged. NISO teleconferences are held from 3-4 p.m. (eastern) on the second Monday of each month (excepting July--no call--and October, which is held October 13th). To join, simply dial 877-375-2160 and enter the code: 17800743.
Tuesday, October 06, 2009
NLM announces a classification course.
The Cataloging Section of the National Library of Medicine® is pleased to announce the availability of an new e-learning course called Fundamentals of the NLM Classification. It is available as a link from the Cataloging Section homepage, as well as the Distance Education page. The course is a free set of modules and interactive exercises that students may take at their own pace without an instructor.This course covers the principles and applications of the NLM Classification in the cataloging environment. The course is divided into nine modules:
Overview of the NLM ClassificationUsing the Online NLM ClassificationComponents of NLM Call NumbersGeneral PrinciplesTable G (Geographic Notations)Form NumbersBibliographies and Related MaterialsClassification of 19th Century Works and Early Printed BooksContinuing Resources