We present AKIRA, an agent-based hybrid architecture designed for cognitive modeling. We describe some of the underlying ideas motivating its development, such as the possibility of exploiting distributed representati...
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ISBN:
(纸本)354026924X
We present AKIRA, an agent-based hybrid architecture designed for cognitive modeling. We describe some of the underlying ideas motivating its development, such as the possibility of exploiting distributed representations and performing parallel, dynamic and context aware computation. We illustrate its main components and capabilities and compare it with some related cognitive architectures, such as DUAL and Copycat. We present also a sample simulation in the visual search domain, exploiting AKIRA's peculiarities for cognitive modeling.
In light of recent attempts to design context-aware mobile phones, this paper contributes by providing findings from a study of mobile phone talk in context. We argue the benefits of investigating empirically the ways...
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ISBN:
(纸本)354026924X
In light of recent attempts to design context-aware mobile phones, this paper contributes by providing findings from a study of mobile phone talk in context. We argue the benefits of investigating empirically the ways in which a place is interactionally constituted as appropriate, or not, for a mobile phone conversation. Based on a study of naturally occurring mobile phone talk, we show how people handle calls in potentially difficult situations. Availability is negotiated, and it is not always agreed on whether a situation is appropriate. these findings pose challenges to the design of context-aware telephony.
Enterprises develop procedures to address focuses in any case. However, procedures result often in sub-optimal solutions for any specific focus. As a consequence, each actor develops his own practice to address a focu...
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ISBN:
(纸本)354026924X
Enterprises develop procedures to address focuses in any case. However, procedures result often in sub-optimal solutions for any specific focus. As a consequence, each actor develops his own practice to address a focus in a given context, focus and its context being particular and specific. the modeling of practices is not an easy task because there are as many practices as contexts of occurrence. this paper proposes a way to deal practically with practices. Based on our definition of context, we present a context-based representation formalism for modeling task accomplishment by users called contextual graphs and its interest for the tasks of incremental acquisition, learning and explanation. contextual graphs are discussed on a modeling in information retrieval.
We investigate contextual categorizations, i.e., categorizations holding only with respect to a specific context, from a formal semantics perspective. contexts are modeled as sets of description logic models for diffe...
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We investigate contextual categorizations, i.e., categorizations holding only with respect to a specific context, from a formal semantics perspective. contexts are modeled as sets of description logic models for different languages, and operations on contexts are defined which provide a new formal characterization of context interplay and especially of a form of context abstraction which we call focus. the framework is compared with relevant related work and discussed from the viewpoint of contexttheory issues. Finally, a simple scenario is formalized.
In ubiquitous computing, the user will be interrupted in performing a task only if the information is relevant to the task or highly important in the situation to justify the interrupt. the information selection and p...
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ISBN:
(纸本)354026924X
In ubiquitous computing, the user will be interrupted in performing a task only if the information is relevant to the task or highly important in the situation to justify the interrupt. the information selection and presentation therefore should be adapted to the user and his current context of use. Nowadays, uncounted Content-Management Systems provide access to a large amount of information, but without context, information is just data. this paper introduces context-Management as a new approach for the design of contextaware systems in ubiquitous computing. As a proof of concept we illustrate three prototypical implementations of contextualized information systems in different applications domains and decompose the underlying framework into its foundational components.
In this paper, we give an overview of our current work on introducing context as first-class objects in Lucid. It allows us to write programs in Lucx (Lucid enriched withcontext) in a high level of abstraction which ...
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In this paper, we give an overview of our current work on introducing context as first-class objects in Lucid. It allows us to write programs in Lucx (Lucid enriched withcontext) in a high level of abstraction which is closer to the problem domain. We include a discussion on contexttheory, representation of context aggregations, and the syntax and semantic rules of Lucx. the implementation of Lucx in GIPSY, a platform under development for compiling Lucid family of languages, is also discussed.
Multi-context systems can be used to represent contextual information and inter-contextual information flow. We show that the local model semantics of a multi-context system is completely determined by the information...
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ISBN:
(纸本)354026924X
Multi-context systems can be used to represent contextual information and inter-contextual information flow. We show that the local model semantics of a multi-context system is completely determined by the information that is obtained when simulating the information flow specified by the system, in such a way that a minimal amount of information is deduced at each step of the simulation. the multi-context system framework implicitly presupposes that information flow is deterministic. In many natural situations, this is not a valid assumption. We propose an extension of the framework to account for non-determinism and provide an algorithm to efficiently compute the meaning of non-deterministic systems.
Belief, defined as a knowledge structure with a degree of subjective confidence that is gained through interaction with other agents in a community, can play a crucial role in cognitive processes. As paradigmatic appl...
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ISBN:
(纸本)354026924X
Belief, defined as a knowledge structure with a degree of subjective confidence that is gained through interaction with other agents in a community, can play a crucial role in cognitive processes. As paradigmatic applications of our socially supported knowledge-belief system, (a) a utterance understanding parser was designed and implemented in Common Lisp CLOS with a belief management system, and (b) a cognitive model of attachment is proposed based on the analysis of analyzing fan letters sent to a toy company.
context is the only means to identify the sense of a polysemous word, All algorithms for word sense disambiguation make use of information within a context window of the target word. What is the best window size for w...
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ISBN:
(纸本)354026924X
context is the only means to identify the sense of a polysemous word, All algorithms for word sense disambiguation make use of information within a context window of the target word. What is the best window size for word sense disambiguation has been long a problem. Different contexts generally give different results even for a same algorithm. In this paper, we exploit an algorithm which is more robust withthe varying of different context used. this method aims to lower the uncertainty brought by classifiers using different context window sizes and make more robust utilization of context while perform well. Experiments show our approach outperforms some other algorithms on both robustness and performance.
the paper presents a context-based approach to operational decision support. the approach focuses on modelling and solving a problem considering changes in the dynamic environment. the problem is modelled by abstract ...
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ISBN:
(纸本)354026924X
the paper presents a context-based approach to operational decision support. the approach focuses on modelling and solving a problem considering changes in the dynamic environment. the problem is modelled by abstract and operational contexts integrating information provided by information sources and domain knowledge. the approach involves ontology management operations for knowledge integration, context management techniques for information organisation, and object-oriented constraint network mechanisms for problem definition and solving. the approach is tested as an adaptive service for on-the-fly portable hospital configuration.
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