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Topic: Semantic network


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In the News (Wed 24 Apr 19)

  
  Semantic network - Wikipedia, the free encyclopedia
A semantic network is often used as a form of knowledge representation.
It is possible to represent logical descriptions using semantic networks such as the Existential Graphs of Charles S. Peirce or the related Conceptual Graphs of John F. Sowa.
In the 1960s to 1980s the idea of a semantic link was developed within hypertext systems as the most basic unit, or edge, in an semantic network.
en.wikipedia.org /wiki/Semantic_network   (457 words)

  
 Semantic Research: Semantic Networks
Semantic networking is based on over thirty years of research in artificial intelligence, cognitive psychology, memetics and learning theory, and has been independently proven to be significantly more effective in the transfer of knowledge.
Semantic networks can grow to extraordinary complexity, necessitating a sophisticated approach to knowledge visualization, balancing the need for simplicity with the full expressive power of the network.
Semantic networks may be traversed via concept list views, via their relations, or by retracing the user's history.
www.semanticresearch.com /semantic   (265 words)

  
 Semantic Networks   (Site not responding. Last check: 2007-10-06)
It is a node-link structure, a semantic network in which the nodes represent chapters and the links represent the relationship of which chapters should be read before which other chapters.
Semantic networks as a representation of knowledge have been in use in artificial intelligence (AI) research in a number of different areas.
Semantic networks are used in this project as structures of knowledge that encourage the user to interact with them.
www.duke.edu /~mccann/mwb/15semnet.htm   (3346 words)

  
 Associative Networks - Information Models in Graph Notation
Although such a network may be explanatorily useful for studies of word association, it is obviously a poor instrument for semantics because a mere associative link from one word to another tells one nothing about the intensional relation between the words.
The network is composed of links between two sorts of nodes: type nodes, which represent concepts, and token nodes, which represent instances of concepts by virtue of the links to their respective type nodes.
Third, comprehensive network theories are based on a formalism containing three components: a parser, a semantic memory consisting of a network of links between nodes, and a set of interpretative processes that operate on the network.
web.cs.mun.ca /~ulf/pld/assoc.html   (2102 words)

  
 2005AC Section 3 UMLS SEMANTIC NETWORK
The purpose of the Semantic Network is to provide a consistent categorization of all concepts represented in the UMLS Metathesaurus and to provide a set of useful relationships between these concepts.
The Network provides information about the set of basic semantic types, or categories, which may be assigned to these concepts, and it defines the set of relationships that may hold between the semantic types.
The Semantic Network serves as an authority for the semantic types that are assigned to concepts in the Metathesaurus.
www.nlm.nih.gov /research/umls/meta3.html   (2155 words)

  
 The Marketing Insight Center - Semantic Network   (Site not responding. Last check: 2007-10-06)
The network and the relationships therein are made explicit to the user of the system, thus relying upon the user's intuitive knowledge about markets.
The value added by the system is both this semantic network structure of marketing relationships and the more intangible "feeling" of navigating and exploring an insight hyperspace.
Semantic networks and hypertext are powerful tools for organizing and browsing marketing reports of all types, including reports produced by insight generators.
www.duke.edu /~mccann/mwb/misemant.htm   (608 words)

  
 JXTA Drives Semantic P2P Networks
A private overlay network can also be thought of as a "semantic network," which provides a context for usage and has its own implementations of membership, security, and services that are appropriate for the type of interactions required.
By encompassing the addressability of all devices within a semantic network, organizations can expand their networks to all who need access to them while shrinking the net to a specific mission, geographic region, echelon, and so on.
In the semantic network approach, each of these networks, or individuals as represented by individual nodes within these networks, would have the ability to dynamically form their own ad hoc P2P networks.
www.sun.com /br/government_421/feature_jxta.html   (1795 words)

  
 Semantic Networks
A propositional semantic network whose nodes represent concepts and conceptual relations; type labels on the concept nodes make CGs into a typed or sorted version of existential graphs in which the EG ovals are represented by concepts of type Proposition.
A definitional network that used a set of 56 different relation types for representing patterns used to guide a parser for disambiguating sentences in machine translation; it is one of the first semantic networks implemented on a digital computer.
A propositional semantic network that combines relational graphs with oval nodes that may contain other EGs or RGs; when the ovals are used to negate the nested graphs, an EG can represent any proposition in first-order logic, but the ovals can also be used to represent modal and metalevel information about the nested graphs.
www.jfsowa.com /pubs/semnet.htm   (10051 words)

  
 1997 UMLS Semantic Network   (Site not responding. Last check: 2007-10-06)
Hierarchies and definitions for the semantic types and relationships are given, and sample records give the reader an indication of structure and content of each of the files.
The Semantic Network serves as an authority for the semantic types that are assigned to concepts in the Metathesaurus and that are assigned to databases in the Information Sources Map (ISM).
An important aspect of the Semantic Network is that the level of granularity varies across the Network.
www.medinfo.rochester.edu /umls/doc/META3.HTM   (6314 words)

  
 UMLS Semantic Network Workshop   (Site not responding. Last check: 2007-10-06)
The Semantic Network was created in an effort to provide a semantic framework for the UMLS and its constituent vocabularies.
Semantic types from the Semantic Network are linked to Metathesaurus concepts by the categorization link established by the Metathesaurus editors: Each concept is categorized with at least one semantic type from the Semantic Network, independently of its hierarchical position in the source vocabularies.
The goals are: to identify current limitations of the Semantic Network and their impact on applications and maintenance of the network itself and to analyze and discuss suggestions for changing and improving the Semantic Network.
mor.nlm.nih.gov /snw   (814 words)

  
 Ranking Semantic-linked Network
This paper introduces the notion of semantic-linked network consisting of semantic links and semantic components, and proposes an approach for ranking the semantic-linked network, which effectively quantifies the semantic importance of semantic components.
A semantic component is a network consisting of arcs of semantic links and small granularity semantic components.
The network is composed of semantic components and semantic links, and a semantic component can be also a semantic-linked network.
www2003.org /cdrom/papers/poster/p148/P148-Zhuge/P148-Zhuge.htm   (1092 words)

  
 System and method for managing semantic network display - Patent 5905498
The user interface for entry of the semantic network uses a windows environment to enter the nodes and the arcs connecting the nodes.
A semantic network is a knowledge representation paradigm that has been the subject of research in artificial intelligence since the 1960's.
On paper, semantic network are often represented as a number of data-containing nodes as objects, with labeled arcs linking related nodes.
www.freepatentsonline.com /5905498.html   (8435 words)

  
 Society Fresh : Article 'Semantic network'   (Site not responding. Last check: 2007-10-06)
de:Semantisches Netz A semantic network is often used as a form of knowledge representation.
Template:Attention A semantic link is a typed link where the element itself provides meaningful information about the link (semantics).
Such links are the basis of a semantic network.
www.society-fresh.net /DisplayArticle52164.html   (258 words)

  
 Stephen's Web ~ by Stephen Downes ~ full post   (Site not responding. Last check: 2007-10-06)
A social network is a website whereby individuals describe themselves in a personal profile, reveal themselves through participation in communities, and form networks of interactions by declaring one another to be 'friends'.
In a social network, the concept of friendship - and hence of the network - is empty.
Where they are able to form networks of meaningful and rewarding relationships with their peers, with people who share the same interests or hobbies, the same political or religious affiliations - or different interests or affiliations, as the case may be.
www.downes.ca /cgi-bin/website/view.cgi?dbs=Article&key=1076791198   (4758 words)

  
 IIMS 1994: Lindley et al - information retrieval and semantic network processing for hypermedia systems   (Site not responding. Last check: 2007-10-06)
Quillian (1967, 1968) is generally regarded as the originator of the notion of a semantic network.
Semantic similarity is the number of links connecting two nodes, whereas semantic distance is the length of the shortest link between two components.
Here the semantic network is used for query expansion, and the expanded query is passed to similarity based text retrieval routines (also used by Solvberg et al, 1991/1992).
www.aset.org.au /confs/iims/1994/km/lindley.html   (3598 words)

  
 Semantic Networks   (Site not responding. Last check: 2007-10-06)
To grasp what a semantic network is, consider two people, John and Sue, paddling in a canoe.
Our network will include, for example (see figure 3.1), the knowledge (or assumptions) that John is a man, Sue is a woman, John is in the canoe, Sue is in the canoe, the canoe is in water, and so on.
For example, the `isa' relationship, as typically used in semantic nets, appears to hide the important distinction between an individual object or entity (for example, `Sue') and a term specifying a class of objects or entities (for example `woman', or `human').
informatics.susx.ac.uk /books/computers-and-thought/chap3/node7.html   (450 words)

  
 UMLS SEMANTIC NETWORK   (Site not responding. Last check: 2007-10-06)
The purpose of the Semantic Network is to provide a consistent categorization of all concepts represented in the UMLS Metathesaurus and to provide a set of useful relations between these concepts.
The children of this type in the network are 'Pharmacologic Substance', 'Biomedical or Dental Material', 'Biologically Active Substance', 'Indicator or Reagent', and 'Hazardous or Poisonous Substance'.
The children of this type in the network are 'Disease or Syndrome', 'Cell or Molecular Dysfunction', and 'Experimental Model of Disease'.
www.coling.uni-freiburg.de /~mr/umls_net.html   (7037 words)

  
 Description of the "How to Build a City" Semantic Network   (Site not responding. Last check: 2007-10-06)
Designing a city is a very complex problem area with many relationships, several of which can be described with a Semantic Network.
The semantic diagram can only show a small percentage of these connections before it begins to look extremely disorganized and confusing.
To view a diagram of a partial semantic network, choose one of the following links: Network~ 23K or Network~123K.
members.tripod.com /%7EPerkinsG/logic/semdesc.htm   (292 words)

  
 Facilitation Predictions From Bower's (1981) Network Model
The preceding explanation has been used to suggest that not only will the affective valence of stimuli influence a person's mood, but that their perception of a stimulus will be influenced by what emotion nodes are activated at a given time (i.e., their mood; Niedenthal and Setterlund, 1994).
Traditionally, researchers subscribing to Bower's network theory have suggested that because depressed people begin a lexical decision task with activated nodes representing sadness, they begin the task with some residual activation of memory representations corresponding to negative stimuli, and not those corresponding to positive stimuli.
Specifically, it will be suggested that the activation of a memory structure representing negativity activates multiple constructs with negative semantic content in the presence of a negative stimulus, creating interference, and thus slowing on the affective lexical decision task for negative words.
www.sci.sdsu.edu /CAL/greg/thesis/node26.html   (456 words)

  
 A LARGE SEMANTIC NETWORK FOR
AURA is a prototype semantic network of over two million natural language phrases derived from more than a million MEDLINE titles.
The associative semantic network allows users to choose appropriate medical subject headings in response to free form natural language query input.
The network literally processes itself, with "intelligent behavior" emerging from the local interactions that occur concurrently between the numerous network components (Reggia, 1988).
web.simmons.edu /~chen/nit/NIT'92/101-dos.htm   (4428 words)

  
 PRESS RELEASE Network Inference Sponsors International Semantic Web Conference   (Site not responding. Last check: 2007-10-06)
"Network Inference is proud to sponsor the ISWC for the third consecutive year," said John Kelly, CEO of Network Inference.
Network Inference supports a robust research program to ensure that its customers are getting proven technology grounded in solid science and international community standards.
Network Inference enterprise solutions offer Global 2000 organizations short-term payback through lower maintenance costs and project risk, and new integration and application capabilities, while providing a standards-driven pragmatic roadmap towards the model-driven Adaptive Enterprise.
www.marketwire.com /mw/release_html_b1?release_id=75747   (504 words)

  
 On the Semantics of a Semantic Network (ResearchIndex)   (Site not responding. Last check: 2007-10-06)
Abstract: We elaborate on the semantics of an enhanced object-oriented semantic network, where multiple instantiation, multiple specialization, and meta-classes are supported for both kinds of objects: entities and properties.
By semantics of a semantic network, we mean the information (both explicit and derived) that the semantic network carries.
17 Unraveling the Semantics of Conceptual Schemas (context) - Papazoglou - 1995
citeseer.ist.psu.edu /13408.html   (698 words)

  
 UMLS ® Semantic Network Fact Sheet
The UMLS Semantic Network is one of three UMLS Knowledge Sources developed by the National Library of Medicine as part of the Unified Medical Language System® project.
The scope of the UMLS Semantic Network is broad, allowing for the semantic categorization of a wide range of terminology in multiple domains.
The 'isa' link establishes the hierarchy of types within the Network and is used for deciding on the most specific semantic type available for assignment to a Metathesaurus concept.
www.nlm.nih.gov /pubs/factsheets/umlssemn.html   (394 words)

  
 George's semantic network of photo tags on Flickr - Photo Sharing!
Semantic network connecting the tags present in George's photostream.
Semantic network connecting the tags present in George's photostream.
I'm not much of a photo-taking person but it'd be interesting to see a network of my del.icio.us tags if you ever get around to playing with that.
www.flickr.com /photos/ciro/4904655   (135 words)

  
 Social Network Analysis
Social network analysis involves the mapping and measuring of these normally invisible relationships between people, providing an organizational X-ray for use by HR managers and consultants.
They can also be used to analyze computer networks (to optimize topology) and information systems (imagine a visual representation of Google's link analysis).
The concepts of network analysis and socially translucent systems are applicable far beyond the confines of text-based chat.
semanticstudios.com /publications/semantics/000006.php   (866 words)

  
 O'Reilly Network: The Semantic Web: It's Whom You Know
This means, for instance, that if you started a Web search with the goal of simplifying your process of computer programming, you would be directed to various design concepts such as real-world modeling, and thence to specific techniques such as inheritance and subclassing.
In short, I think semantic tagging and Web services are useful for certain business applications and other areas where interactions can be formalized, but they aren't going to create a completely new way of using digital information.
All trademarks and registered trademarks appearing on the O'Reilly Network are the property of their respective owners.
www.oreillynet.com /pub/a/network/2002/04/19/platform.html   (1821 words)

  
 elearnspace: The Semantic Social Network   (Site not responding. Last check: 2007-10-06)
The Semantic Social Network: "Two types of technologies are about to merge.
The technologies are content syndication, used by blogging websites around the world, and social networking, employed by sites such as Friendster [http://www.friendster.com] and Orkut [http://www.orkut.com].
They will merge to create a new type of internet, a network within a network, and in so doing reshape the internet as we know it." Comment: This article is written ahead of its time.
www.elearnspace.org /blog/archives/001515.html   (116 words)

  
 Bootstrapping Methods for Knowledge Structuring
Assume that we have a mental model in the form of a semantic network, which, for example, has been elicited from an individual or group of users.
The bootstrapping techniques assume that the model is organized as a network of nodes, representing concepts and instances, connected by a variety of semantic links, representing if-then rules and IS_A hierarchies.
For example, if two nodes A and B are identified, two nodes C and D that previously were distinguished by their links to respectively A and B will now point to the same node A-B. Therefore, C and D may themselves need to be identified, differentiated or integrated.
pespmc1.vub.ac.be /KNOWSTRUC.html   (592 words)

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