The 15^th International Workshop on Conceptual Structures ICCS 2007 brings together numerous discussions between international groups of researchers from the field of Information and Communications Technology (ICT).

Trust in E-systems and the Grid Workshop.- A Contextualised Trust Model for Distributed Open Systems.- Evaluation of Security Mechanisms for Virtual Organizations.- Non-Repudiable and Repudiable Authentications in E-Systems.- Semiotic Models of Trust and Usability for Agent-Managed Grid Services.- Using Trusted Computing in Commercial Grids.- Quantitative Approaches for Knowledge Discovery and Decision Support in the Post-Genomic Era.- A semantic Grid Infrastructure Enabling Integrated Access and Knowledge Discovery from Multilevel Data in Ppost-Genomic Clinical Trials.- Enhancement of Multispectral Chromosome Image Classification Using Vector Median Filtering.- Extending the Interpretation of Gene Profiling Microarray Experiments to Pathway Analysis Through the Use of Gene Ontology Terms.- Gene Expression Analysis for the Identification of Genes Involved in Early Tumour Development.- Multi-Knowledge: Collaborative Environments for the Extraction of New Knowledge from Heterogenous Medical Data Sources.- Pattern Analysis and Decision Support for Cancer through Clinico-Genomic Profiles.- International Workshop on Rough Sets and Data Mining.- Categorization of Musical Instrument Sounds Based on Numerical Parameters.- Evaluating the Utility of Web-Based Consumer Support Tools Using Rough Sets.- Local Table Condensation in Rough Set Approach for Jumping Emerging Pattern Induction.- Rough Monadic Interpretations of Pharmacologic Information.- Rough Set Approach to Analysis of Students Academic Performance in Web-based Learning Support System.- Visual Data Mining of Symbolic Knowledge using Rough Sets, Virtual Reality and Fuzzy Techniques: An Application in Geophysical Prospecting.- International Workshop on Ubiquitous and Collaborative Computing.- A Multi-Stage Negotiation Mechanism with Service-Oriented Implementation.- Activities Distribution Around a Horizontal Interface Supporting Small Group Meetings.- Computational Model for Ethnographically Informed Systems Design.- Developing Ubiquitous Collaborating Services in Grid Environment.- Structuring Community Care using Multi-Agent Systems.- Supporting the Social Dynamics of Meetings Using Peer-to-Peer Architecture.- The Chawton House Project: Co-Designing Situated UbiComp.- Semantic Information Retrieval Workshop.- Association Analysis of Alumni Giving: A Formal Concept Analysis.- Comparison of Automatic Clustering and Manual Categorization of Documents.- Extreme Programming: A Kuhnian Revolution?.- Lossy Text Compression Techniques.- Self-Customization of E-Knowledge Using Color Semantics.- Industry Day 2007.- A Transactions Framework for Effective Enterprise Knowledge Management.- Data Analyzer Prototype Using a K Data Structure Based on the Phaneron of C. S. Peirce.- Mobile Transactional Modelling: From Concepts to Incremental Knowledge.

The 15th International Conference on Conceptual Structures (ICCS 2007) is the latest in a series of annual conferences that have been held in Europe, Australia, and North America since 1993. Some of the world's best minds in information technology, arts, humanities and social science converged to explore novel ways that information and communications technology (ICT) can augment human intelligence, the longstanding objective of research and development efforts dating back to the pioneers Vannevar Bush and Douglas Engelbart.

Topics covered include Formal Concept Analysis, Description Logics, the Semantic Web, the Pragmatic Web, Ontologies, Multi-agent Systems, Concept Mapping, and more. The conceptual structures represent a family of approaches that build on the successes of artificial intelligence, business intelligence, computational linguistics, conceptual modelling, information and web technologies, user modelling, and knowledge management. The workshop proceedings from ICCS 2007 provided a holistic forum for the dissemination of research results within the context of conceptual structures, including key research findings in Ontology Engineering, Grid Services, Knowledge Management, and Knowledge driven Bio-Informatics.

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