Marcelo Tallis

YNIMG Journal 2016 Journal Article

SchizConnect: Mediating neuroimaging databases on schizophrenia and related disorders for large-scale integration

• Lei Wang
• Kathryn I. Alpert
• Vince D. Calhoun
• Derin J. Cobia
• David B. Keator
• Margaret D. King
• Alexandr Kogan
• Drew Landis

SchizConnect (www. schizconnect. org) is built to address the issues of multiple data repositories in schizophrenia neuroimaging studies. It includes a level of mediation—translating across data sources—so that the user can place one query, e. g. for diffusion images from male individuals with schizophrenia, and find out from across participating data sources how many datasets there are, as well as downloading the imaging and related data. The current version handles the Data Usage Agreements across different studies, as well as interpreting database-specific terminologies into a common framework. New data repositories can also be mediated to bring immediate access to existing datasets. Compared with centralized, upload data sharing models, SchizConnect is a unique, virtual database with a focus on schizophrenia and related disorders that can mediate live data as information is being updated at each data source. It is our hope that SchizConnect can facilitate testing new hypotheses through aggregated datasets, promoting discovery related to the mechanisms underlying schizophrenic dysfunction.

KER Journal 2007 Journal Article

Adding deductive logic to a COTS spreadsheet

• Marcelo Tallis
• RAND WALTZMAN
• ROBERT BLAZER

Abstract We exploit the spreadsheet metaphor to make deductive problem-solving methods available to the vast population of spreadsheet end-users. In particular, we show how the function-based problem-solving capabilities of spreadsheets can be extended to include logical deductive methods in a way that is consistent with the existing spreadsheet ‘look and feel’. The foundation of our approach is the integration of a standard deductive logic system into a successful Commercial-Off-The-Shelf (COTS) spreadsheet. We have demonstrated this by designing and implementing an extension to Excel that manages the integration of Excel and a deductive logic engine based on the World Wide Web Consortium (W3C) standard ontology language OWL + SWRL.

AAAI Conference 1999 Conference Paper

Designing Scripts to Guide Users in Modifying Knowledge-Based Systems

• Marcelo Tallis
• Yolanda Gil
• University of Southern California

Knowledge Acquisition (KA)Scripts capture typical modificationsequencesthat users follow when they modify knowledgebases. KAtools can use these Scripts to guide users in makingthese modifications, ensuringthat they follow all the ramifications of the changeuntil it is completed. This paper describes our approachto design, develop, and organize a library of KAScripts. Wereport the results of three different analysis to develop this library, including a detailed study of actual modification scenarios in two knowledgebases. In addition to identifying a good numberof KA Scripts, wefounda set of useful attributes to describe and organize the KAScripts. These attributes allowus to analyzethe size of the library and generate newKAScripts in a systematic way. Wehaveimplemented a portion of this library and conducted twodifferent studies to evaluate it. The result of this evaluation showeda 15 to 52 percent time savings in modifying knowledgebases andthat the library included relevant and useful KA Scripts to assist users in realistic settings.

AAAI Conference 1998 Short Paper

A Script-Based Approach to Modifying Knowledge-Based Systems

• Marcelo Tallis

AAAI Conference 1997 Short Paper

Modifying Knowledge Bases Using Scripts

• Marcelo Tallis