Filters








107,919 Hits in 5.1 sec

A hybrid approach to generating and utilizing faceted vocabulary for knowledge discovery on the web

Kiduk Yang, Elin Jacob
2004 Proceedings of the 2004 joint ACM/IEEE conference on Digital libraries - JCDL '04  
Our study investigates a hybrid approach that leverage existing classification hierarchy to construct and utilize a flexible classification scheme, where users can engage in knowledge discovery process  ...  The focus of concept search application is in efficient and effective identification of important concepts and concept relationships that are useful in fulfilling user's information need.  ...  Our study investigates a hybrid approach that leverage existing classification hierarchy to construct and utilize a flexible classification scheme, where users can engage in knowledge discovery process  ... 
doi:10.1145/996350.996461 dblp:conf/jcdl/YangJ04 fatcat:f7gepfclmvajrnwzplx7rx6ixa

Object aggregation and cluster identification: a knowledge discovery approach

X.-H. Hu
1994 Applied Mathematics Letters  
A method for object aggregation and cluster identification has been proposed for knowledge discovery in databases.  ...  Different kinds of knowledge rules, including hierarchical, equivalence and inheritance rules can be discovered efficiently.  ...  labeling plays an important role in knowledge discovery.  ... 
doi:10.1016/0893-9659(94)90006-x fatcat:puwtjtqvlzbqfbuferjt32nqge

Towards efficient induction mechanisms in database systems

Jiawei Han
1994 Theoretical Computer Science  
With the wide availability of huge amounts of data in database systems, the extraction of knowledge in databases by efficient and powerful induction or knowledge discovery mechanisms has become an important  ...  In this article, an attribute-oriented induction method for knowledge discovery in databases is investigated, which provides an efficient, set-oriented induction mechanism for extraction of different kinds  ...  Dynamic refinement of concept hierarchies Our study assumes that there exists relatively strong background knowledge in the form of concept hierarchies for knowledge discovery.  ... 
doi:10.1016/0304-3975(94)90194-5 fatcat:gscfkjxap5ezhaqqgzydyhpvxa

Management of dynamic knowledge

Peter Haase, Johanna Völker, York Sure, John Davies
2005 Journal of Knowledge Management  
Our approach for usage-driven and data-driven change discovery not only assures the consistency of ontologies modeling dynamic knowledge, but also reduces the burden of manual ontology engineering.  ...  Practical implications -The management of dynamic knowledge is crucial for many knowledge management applications.  ...  Let us assume that in the initial hierarchy (developed by using one of abovementioned approaches), the concept X has ten sub-concepts (c1, c2,..., c10), i.e. an ontology engineer has found that these ten  ... 
doi:10.1108/13673270510622483 fatcat:ens6irvcwjaw3aqoti5ywz63du

ODMQL: Object Data Mining Query Language [chapter]

Mohamed G. Elfeky, Amani A. Saad, Souheir A. Fouad
2001 Lecture Notes in Computer Science  
Data mining is the discovery of knowledge and useful information from the large amounts of data stored in databases.  ...  The concepts of such a language for relational databases are discussed in [11] .  ...  Using concept hierarchies, the knowledge mined from the database can be represented in terms of generalized concepts and stated in a simple and explicit form.  ... 
doi:10.1007/3-540-44677-x_9 fatcat:ehyjexbcd5brlgpex3h2ol5xwi

A New Web Usage Mining Approach for Website Recommendations Using Concept Hierarchy and Website Graph

T. Vijaya Kumar, H. S. Guruprasad, Bharath Kumar K. M., Irfan Baig, Kiran Babu S.
2014 International Journal of Computer and Electrical Engineering  
Index Terms-Concept based website graph, concept hierarchy, web mining, web usage mining, website graph.  ...  Along with the server access log file, we incorporate Website knowledge (i.e., Concept hierarchy and Website Graph) into the web usage mining phases. This incorporation can lead to superior patterns.  ...  This hierarchy is collection of domain concepts which are organized using "IS-A" and "HAS-A" relationship. Fig.2. (b) represents the concept hierarchy of enggresources.com.  ... 
doi:10.7763/ijcee.2014.v6.796 fatcat:wnqo7evkgbeqdft7ld3pdcjbpi

A Web-scale system for scientific knowledge exploration

Zhihong Shen, Hao Ma, Kuansan Wang
2018 Proceedings of ACL 2018, System Demonstrations  
both text and graph structure, and (3) build a six-level concept hierarchy with a subsumption-based model.  ...  To enable efficient exploration of Webscale scientific knowledge, it is necessary to organize scientific publications into a hierarchical concept structure.  ...  In this work, we present a Web-scale system with three modules-concept discovery, concept-document tagging, and concept-hierarchy generation-to facilitate scientific knowledge exploration (see Figure  ... 
doi:10.18653/v1/p18-4015 dblp:conf/acl/ShenMW18 fatcat:ptxrpms6rbdjfmalx5a5x7gpim

Contextual Data and Domain Knowledge for Incorporation in Knowledge Discovery Systems [chapter]

Alex G. Büchner, John G. Hughes, David A. Bell
1999 Lecture Notes in Computer Science  
The concepts of contextual data and domain knowledge is proposed and incorporated in a generic knowledge discovery architecture. The outlined concepts are supported electronic commerce examples.  ...  Then, the concepts, which are based on previous work, are incorporated in a generic knowledge discovery framework.  ...  Depending on the context from which information is requested, data and domain knowledge is used as input for knowledge discovery.  ... 
doi:10.1007/3-540-48315-2_35 fatcat:n3l5k462t5ekboqqkbkktet2wu

A Web-scale system for scientific knowledge exploration [article]

Zhihong Shen, Hao Ma, Kuansan Wang
2018 arXiv   pre-print
both text and graph structure, and (3) build a six-level concept hierarchy with a subsumption-based model.  ...  To enable efficient exploration of Web-scale scientific knowledge, it is necessary to organize scientific publications into a hierarchical concept structure.  ...  In this work, we present a Web-scale system with three modules-concept discovery, concept-document tagging, and concept-hierarchy generation-to facilitate scientific knowledge exploration (see Figure  ... 
arXiv:1805.12216v1 fatcat:xyme6wg3o5gjxi6wea7f6ovj34

Discovering and Comparing Relational Knowledge, the Example of Pharmacogenomics

Pierre Monnin
2018 International Conference Knowledge Engineering and Knowledge Management  
In this research, we aim at proposing a framework based on Semantic Web technologies and Formal Concept Analysis to discover, represent and compare PGx knowledge units.  ...  State-of-the-art PGx knowledge is available in the biomedical literature as well as in specialized knowledge bases.  ...  Finally, knowledge discovery from EHRs represented as RDF graphs or comparing knowledge in RDF graphs can be achieved using Formal Concept Analysis (FCA) [11] .  ... 
dblp:conf/ekaw/Monnin18 fatcat:vtgfjv3c2fffhb6t37dmxqblje

Combining Faceted Classification and Concept Search: A Pilot Study

Kiduk Yang
2014 Journal of the Korean Society for Library and Information Science  
Classification-based Search and Knowledge Discovery (CSKD) project. 1) In this paper, we describe our explorations of classification-based approach to knowledge discovery that combines information organization  ...  units, but also the utilization of classification data for knowledge discovery.  ... 
doi:10.4275/kslis.2014.48.4.005 fatcat:yv26awp57zbfdnpp4itmgl3jae

Discovery of Multi-Level Security Policies [chapter]

Christina Yip Chung, Michael Gertz, Karl Levitt
2002 IFIP International Federation for Information Processing  
The approach is based on using multiple concept hierarchies that specify properties of objects and data at different levels of abstraction and thus can embed useful domain knowledge.  ...  These approaches, however, are often too fine-grained in that they compute too many rules to be useful for an administrator in implementing appropriate security enforcing mechanisms.  ...  For example, in case of relational database systems, profiles can be converted into either appropriate user roles (with associated profiles) or user/application-specific views on data.  ... 
doi:10.1007/0-306-47008-x_16 fatcat:evman2p3arbyfl6rkfq27olfta

Matching directories and OWL ontologies with AROMA

Jérôme David, Fabrice Guillet, Henri Briand
2006 Proceedings of the 15th ACM international conference on Information and knowledge management - CIKM '06  
By using a well-known Knowledge Discovery in Databases model, such as the association rule paradigm, this method has the originality to be both extensional and asymmetric.  ...  It works at the terminological level (by selecting conceptrelevant terms contained in documents) and permits to discover equivalence and also subsumption relations holding between entities (concepts and  ...  In parallel, knowledge discovery in databases (KDD) [3] widely uses the asymmetric measures, called interestingness measures, for association rule discovery.  ... 
doi:10.1145/1183614.1183752 dblp:conf/cikm/DavidGB06 fatcat:nwdrmzk5uvesngdp5bmho2dpo4

Linked open data-based framework for automatic biomedical ontology generation

Mazen Alobaidi, Khalid Mahmood Malik, Susan Sabra
2018 BMC Bioinformatics  
LOD-ABOG performs concept extraction using knowledge base mainly UMLS and LOD, along with Natural Language Processing (NLP) operations; and applies relation extraction using LOD, Breadth first Search (  ...  Additionally, the comparison with manually constructed baseline Alzheimer ontology shows F-measure of 72.48% in terms of concepts detection, 76.27% in relation extraction, and 83.28% in property extraction  ...  Such challenges include concepts discovery, taxonomic relationships extraction (that define a concept hierarchy), and non-taxonomic relationships.  ... 
doi:10.1186/s12859-018-2339-3 pmid:30200874 pmcid:PMC6131949 fatcat:drrkhq63zbeung3sssq2htltq4

Database summarization using fuzzy ISA hierarchies

Do Heon Lee, Myoung Ho Kim
1997 IEEE Transactions on Systems Man and Cybernetics Part B (Cybernetics)  
In this paper, we propose an interactive top-down summary discovery process which utilizes fuzzy ISA hierarchies as domain knowledge.  ...  discovery is one of the major components of knowledge discovery in databases, which provides the user with comprehensive information for grasping the essence from a large amount of information in a database  ...  Fuzzy ISA hierarchies used as domain knowledge are introduced in Section III. An interactive top-down summary discovery process is proposed in Section IV.  ... 
doi:10.1109/3477.604110 pmid:18255905 fatcat:x73jzchxtzei7pdganwvcz4dre
« Previous Showing results 1 — 15 out of 107,919 results