20,204 research outputs found
Application-Oriented Context Pre-fetch Method for Improving Inference Performance in Ontology-based Context Management
No full textNon-reversible Metastable Diffusions with Gibbs Invariant Measure II: Markov Chain Convergence
No full textThis article considers a class of metastable non-reversible diffusion
processes whose invariant measure is a Gibbs measure associated with a Morse
potential. In a companion paper [32], we proved the Eyring-Kramers formula for
the corresponding class of metastable diffusion processes. In this article, we
further develop this result by proving that a suitably time-rescaled metastable
diffusion process converges to a Markov chain on the deepest metastable
valleys. This article is also an extension of [45], which considered the same
problem for metastable reversible diffusion processes. Our proof is based on
the recently developed resolvent approach to metastability.Comment: 39 pages, 4 figures (the article is significantly revised at
2022-07-20; the resolvent approach is used to simplify the argument
A Dynamic Context-Conflict Resolution Scheme for Group-aware Ubiquitous Computing Environments
No full textIn this paper, we propose a context-conflict management scheme for group-aware ubiquitous computing environments that allows context-aware applications to serve multiple users without distracting and sacrificing each other. The proposed scheme can detect semantic conflicts without explicit descriptions of the conflicts between different applications. Conflicts are resolved by a dynamically generated adaptation policy based on the weight value of user preference on each service. Individual context-aware applications can be reused without modification since middleware components for the context-conflict management take charge of detecting and resolving conflicts. Thus, the complicated context-conflict situation becomes more transparent to application programmers
A dynamic context-conflict management scheme for group-aware ubiquitous computing environments
No full textIn this paper, we propose a context-conflict management scheme for group-aware ubiquitous computing environments that allows context-aware applications to serve multiple users without distracting and sacrificing each other. The proposed scheme can detect semantic conflicts without explicit descriptions of the conflicts between different applications. Conflicts are resolved by a dynamically generated adaptation policy based on the weight value of user preference on each service. Individual context-aware applications can be reused without modification since middleware components for the context-conflict management take charge of detecting and resolving conflicts. Thus, the complicated context-conflict situation becomes more transparent to application programmers
Context-conflict management for context-aware applications in a shared pervasive computing environment
No full textMiRE4OWL: Mobile Rule Engine for OWL
No full textMobile user devices, such as smart phones have become the most popular high-end mobile devices far beyond just cellular communication devices. They will continue evolving toward being palm-top computers with the rapid development of wireless communications and platform technologies. This paper introduces our development of a semantic reasoner called MiRE4OWL to be installed onto the resource-limited mobile user devices to accommodate context-aware ubiquitous computing services. It is a data-log and rule-based inference engine which performs semantic reasoning operations over the application semantics represented in OWL-DL. The mobile rule engine that underlies MiRE4OWL achieves light-weight design to meet the resource constraints of the mobile devices and yet achieves better expressiveness than existing engines. The performance evaluation showed that the intended functionality and resource efficiency have been fulfilled
Dynamic activity lifecycle management in ubiquitous computing environments
No full textIt is inherently allowed that a user engages in more than one activity at the same time. The interweave of multiple activities makes an activity have more than two states, i.e. the paused state in addition to active and inactive states and move from one state to another. In this paper, we propose an activity lifecycle management scheme that enables a system to adapt the services which help a user to do an activity to the state transitions of the activity. The proposed scheme detects the interruption between activities in terms of perceivable effects of their associated services. The state transitions of an activity driven by the interruption are handled by Event-Condition-State-Action (ECSA) policy, which is extended from ECA policy. It specifies how the services should be adapted to the interruption degree - how much the interrupting activity interferes the current activity as well as the state transition of an activity
A Group-Aware Middleware for Ubiquitous Computing Environments
No full textIn this paper, we present, Active Surroundings, a groupaware middleware infrastructure for ubiquitous computing environments. Our system focuses on two key issues: group-awareness and transparent application reconfiguration. To achieve these goals, Active Surroundings is composed of four key component: environment sensing for abstraction of environment status and changes and tracing movements of a group of users, context management for collection, identification, and representation of user intention and resolution of group context conflict, context-aware service discovery for finding appropriate service based on context information, and dynamic reconfiguration support for
dynamic reconfiguration of service objects with minimal overhead
Who Was Edmund Lee?
No full textLocal author Peggy Donoho discusses her pioneer ancestor, Edmund Lee, and her work to preserve their family cemetery
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