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1.
The increasing user mobility demands placed upon IT services necessitates an environment that enables users to access optimal
services at any time and in any place. This study presents research conducted to develop a system that is capable of analyzing
user IT service patterns and tendencies and provides the necessary service resources by sharing each user’s context information.
First, each user’s context information is gathered to provide the multi-agent software training data necessary to describe
user operations in a hybrid peer-to-peer (P2P) structured communication environment. Next, the data collected about each user’s
mobile device is analyzed through a Bayesian based neural network system to identify the user’s tendency and extract essential
service information. This information provides a communication configuration allowing the user access to the best communication
service between the user’s mobile device and the local server at any time and in any place, thereby enhancing the ubiquitous
computing environment. 相似文献
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Kristiina Jokinen 《Universal Access in the Information Society》2006,4(4):374-392
This article describes the User Model component of AthosMail, a speech-based interactive e-mail application developed in the context of the EU project DUMAS. The focus is on the system’s adaptive capabilities and user expertise modelling, exemplified through the User Model parameters dealing with initiative and explicitness of the system responses. The purpose of the conducted research was to investigate how the users could interact with a system in a more natural way, and the two aspects that mainly influence the system’s interaction capabilities, and thus the naturalness of the dialogue as a whole, are considered to be the dialogue control and the amount of information provided to the user. The User Model produces recommendations of the system’s appropriate reaction depending on the user’s observed competence level, monitored and computed on the basis of the user’s interaction with the system. The article also discusses methods for the evaluation of adaptive user models and presents results from the AthosMail evaluation.The research was done while the author was affiliated with the University of Art and Design Helsinki as the scientific coordinator of the DUMAS project. 相似文献
4.
What is the difference? A cognitive dissimilarity measure for information retrieval result sets 总被引:2,自引:1,他引:1
Carsten Ke?ler 《Knowledge and Information Systems》2012,30(2):319-340
Result rankings from context-aware information retrieval are inherently dynamic, as the same query can lead to significantly
different outcomes in different contexts. For example, the search term Digital Camera will lead to different—albeit potentially overlapping—results in the contexts customer reviews and shops, respectively. The comparison of such result rankings can provide useful insights into the effects of context changes on
the information retrieval results. In particular, the impact of single aspects of the context in complex applications can
be analyzed to identify the most (and least) influential context parameters. While a multitude of methods exists for assessing
the relevance of a result ranking with respect to a given query, the question how different two result rankings are from a user’s point of view has not been tackled so far. This paper introduces DIR, a cognitively
plausible dissimilarity measure for information retrieval result sets that is based solely on the results and thus applicable
independently of the retrieval method. Unlike statistical correlation measures, this dissimilarity measure reflects how human
users quantify the changes in information retrieval result rankings. The DIR measure supports cognitive engineering tasks
for information retrieval, such as work flow and interface design: using the measure, developers can identify which aspects
of context heavily influence the outcome of the retrieval task and should therefore be in the focus of the user’s interaction
with the system. The cognitive plausibility of DIR has been evaluated in two human participants tests, which demonstrate a
strong correlation with user judgments. 相似文献
5.
MIMOSA: context-aware adaptation for ubiquitous web access 总被引:2,自引:2,他引:0
Delfina Malandrino Francesca Mazzoni Daniele Riboni Claudio Bettini Michele Colajanni Vittorio Scarano 《Personal and Ubiquitous Computing》2010,14(4):301-320
The ubiquitous computing scenario is characterized by heterogeneity of devices used to access services, and by frequent changes
in the user’s context. Hence, adaptation according to the user’s context and the used devices is necessary to allow mobile
users to efficiently exploit Internet-based services. In this paper, we present a distributed framework, named MIMOSA, that
couples a middleware for context-awareness with an intermediary-based architecture for content adaptation. MIMOSA provides
an effective and efficient solution for the adaptation of Internet services on the basis of a comprehensive notion of context,
by means of techniques for aggregating context data from distributed sources, deriving complex contextual situations from
raw sensor data, evaluating adaptation policies, and solving possible conflicts. The middleware allows programmers to modularly
build complex adaptive services starting from simple ones, and includes tools for assisting the user in declaring her preferences,
as well as mechanisms for detecting incorrect system behaviors due to a wrong choice of adaptation policies. The effectiveness
and efficiency of MIMOSA are shown through the development of a prototype adaptive service, and by extensive experimental
evaluations. 相似文献
6.
Increasingly, application developers are looking for ways to provide users with higher levels of personalization that capture different elements of a user’s operating context, such as her location, the task that she is currently engaged in, who her colleagues are, etc. While there are many sources of contextual information, they tend to vary from one user to another and also over time. Different users may rely on different location tracking functionality provided by different cell phone operators; they may use different calendar systems, etc. In this article, we describe work on a Semantic e-Wallet aimed at supporting automated identification and access of personal resources, each represented as a Semantic Web Service. A key objective is to provide a Semantic Web environment for open access to a user’s contextual resources, thereby reducing the costs associated with the development and maintenance of context-aware applications. A second objective is, through Semantic Web technologies, to empower users to selectively control who has access to their contextual information and under which conditions. This work has been carried out in the context of myCampus, a context-aware environment aimed at enhancing everyday campus life. Empirical results obtained on Carnegie Mellon’s campus are discussed. 相似文献
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On context-aware distributed event dissemination 总被引:1,自引:1,他引:0
Chen Lin Beihong Jin Zhenyue Long Haibiao Chen 《Personal and Ubiquitous Computing》2011,15(3):305-314
In pervasive environments, the Pub/Sub paradigm is regarded as an important means of information sharing and event dissemination.
In this paper, we first analyze different context in Pub/Sub systems that has remarkable impacts upon user’s satisfaction
to event dissemination and then give corresponding strategies by exploiting time context and event-preference context so as
to provide personalized event dissemination. That is, by leveraging time context, we provide the extended matching against
long-standing events, and by leveraging event-preference context, we present the recommendation algorithm which is based on
hidden Markov process. Performance analysis and experiment evaluation show that both strategies can improve user’s experiences
of event dissemination. 相似文献
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A. G. Buddhika P. Jayasekara Keigo Watanabe Kazuo Kiguchi Kiyotaka Izumi 《Artificial Life and Robotics》2010,15(1):5-9
This article proposes a method for adapting a robot’s perception of fuzzy linguistic information by evaluating vocal cues.
The robot’s perception of fuzzy linguistic information such as “very little” depends on the environmental arrangements and
the user’s expectations. Therefore, the robot’s perception of the corresponding environment is modified by acquiring the user’s
perception through vocal cues. Fuzzy linguistic information related to primitive movements is evaluated by a behavior evaluation
network (BEN). A vocal cue evaluation system (VCES) is used to evaluate the vocal cues for modifying the BEN. The user’s satisfactory
level for the robot’s movements and the user’s willingness to change the robot’s perception are identified based on a series
of vocal cues to improve the adaptation process. A situation of cooperative rearrangement of the user’s working space is used
to illustrate the proposed system by a PA-10 robot manipulator. 相似文献
10.
Information systems are the glue between people and computers. Both the social and business environments are in a continual,
some might say chaotic, state of change while computer hardware continues to double its performance about every 18 months.
This presents a major challenge for information system developers. The term user-friendly is an old one, but one which has come to take on a multitude of meanings. However, in today’s context we might well take
a user-friendly system to be one where the technology fits the user’s cognitive models of the activity in hand. This article
looks at the relationship between information systems and the changing demands of their users as the underlying theme for
the current issue of Cognition, Technology and Work. People, both as individuals and organisations, change. The functionalist viewpoint, which attempts to freeze and inhibit
such change, has failed systems developers on numerous occasions. Responding to, and building on, change in the social environment
is still a significant research issue for information systems specialists who need to be able to create living information
systems. 相似文献