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Context-aware applications have the ability to sense the context of the user and use the sensed context information to make adaptation decision in response to changes in the user's context. Hence, besides the functional requirements, context-awareness is an important requirement of such applications. Although, the use case diagram of the Unified Modeling Language (UML) is considered as the industr...Show More
With the rapid growth of various applications on the Internet, recommender systems become fundamental for helping users alleviate the problem of information overload. Since contextual information is a significant factor in modeling the user behavior, various context-aware recommendation methods have been proposed recently. The state-of-the-art context modeling methods usually treat contexts as cer...Show More
Any of our living environments can form a smart space that provides services and applications for the users according to their situations, the computing and communication facilities of the environment and the surroundings of the user. The ability to take into account the context of the user, and the digital and physical environment makes a space smart. This paper introduces a set of new capabiliti...Show More
Context-awareness is one of the major research areas of pervasive computing. Context plays an important role in such systems. In most existing work, researchers view context as all elements in the environment of an application and use it just as passive data. This kind of context is unfavorable to the quality of context-aware applications. During the development of applications, it is difficult fo...Show More
Context helps to understand the meaning of a word and allows the disambiguation of polysemic terms. Many researches took advantage of this notion in information retrieval. For concept-based video indexing and retrieval, this idea seems a priori valid. One of the major problems is then to provide a definition of the context and to choose the most appropriate methods for using it. Two kinds of conte...Show More
The aim of this research was to study the structure of the most satisfying and unsatisfying user experiences in terms of experienced emotions, psychological needs, and contextual factors. 45 university students wrote descriptions of their most satisfying and unsatisfying recent user experiences and analyzed those experiences using the Positive and Negative Affect Schedule (PANAS) method for experi...Show More
This paper presents a social and personal context modeling method on mobile device. It infers userpsilas contexts, such as amity with others and emotional state, from uncertain logs stored in mobile devices using Bayesian networks. Proper services are then provided to the user based on the semantic compatibility between current and past contexts. Here, the contexts are hierarchically matched after...Show More
The content granularity and context information are two important factors to the efficiency and reusability of learning objects. The context information is necessary to facilitate the discovery and reuse of learning objects stored in global and/or local repositories. However, traditional learning objects are generally not conceived to incorporate with enough context information. Users have to do s...Show More
By RFID (Radio Frequency Identification Technology) technology and internet, IOV (Internet of Vehicles) can extract and use kinds of static or dynamic information from all the vehicles. In addition, it can manage vehicles as well as supporting comprehensive services according to different application demands. Nowadays, IOV needs more composite information including not only basic RFID info but als...Show More
We observe two of the recent trends in information technology. Cloud Computing (CC) is widely accepted as an effective reuse paradigm. Mobile Computing with Mobile Internet Device (MID) such as iPhones and Android devices becomes a convenient alternative to personal computers by integrating mobility, communication, software functionality, and entertainment. Due to the resource limitations of MIDs,...Show More
This paper proposes a service automaton to proactively provide services to users in a context aware pervasive system. First, a context space (CSP) model is proposed based on conceptual space theory, and this model deals with context, situation, services and user preferences in a unified way. In CSP, situation is used to depict the specific scene faced by a user; user preferences can be deemed as a...Show More
Elderly health-monitoring systems provide various proactive services according to context. Context plays an essential role in semantic understanding of human activities from sensor data. We present a novel event-driven context model for elderly health-monitoring application, which supports a distributed system with multimodal sensors. The context model is a dynamic hierarchical structure modeling ...Show More
In this era of information explosion, providing the right information to the right person within reasonable time duration to support humans in accomplishing their tasks is the main task of knowledge recommendation systems. Context plays an important role in the process of improving the effectiveness and precision in knowledge recommendation system. While extant researches of knowledge recommendati...Show More
As urban distribution activities becoming frequently, the urban distribution enterprise has accumulated a mass of distribution case knowledge service. How to quickly identify and agilely reuse these massive distribution knowledge, to support the urban distribution activities well, has become a focus of reach of scholars. Based on defining the concept of urban distribution tasks context and case co...Show More
The purpose of this paper is to present systemic cognitive pragmatics relations between product symbol and user for product symbol innovation. According to the theories of cognitive pragmatics, the cognitive pragmatics theory in product design was established. Combining with elements of semiotics, the work presented in this paper analyzed cognitive process with `denotation-connotation-function¿ an...Show More
Context-aware mobile computing belongs to the field of ubiquitous computing. It aims to enable device to provide better service for people through applying available context information. In this paper, context-aware mobile computing was elaborated. Firstly, the history of definition of context was summarized, and then the new classification of human-centric context was proposed. The acquiring and ...Show More
In this paper, we propose an online evolutionary context-aware classifier ensemble framework for object recognition systems which are adaptive to various environments. The starting point utilizes a context recognizer, a context knowledge base and a classifier ensemble generator to provide optimal solutions for classifier ensemble. Even though our framework is quite general and could be applied to ...Show More
Semantic similarity measurement gained attention over the last years as a non-standard inference service for various kinds of knowledge representations including description logics. Most existing similarity measures compute an undirected overall similarity, i.e., they do not take the context of the similarity query into account. If they do, the notion of context is usually reduced to the selection...Show More
The rapid evolution of information and communication technology opens a wide spectrum of opportunities to change our surroundings into an Ambient Intelligent (AmI) world. AmI is a vision of future information society, where people are surrounded by a digital environment that is sensitive to their needs, personalized to their requirements, anticipatory of their behavior, and responsive to their pre...Show More
Several learning technologies have been developed over the years in order to help distance learning process. However, those technologies are still not enough to give the proper interaction between their users and the technologies themselves. It is caused by the absence of the technologies ability to give context based on their users conditions. When human interacts with each other, they understand...Show More
Context-based service is the trend of next generation service especially under the wireless pervasive computing environment. In order to provide the always best experience (ABE) under heterogeneous communication system, it's very important for applications to get support from distributed context information. So, the context aware system should have the ability of collecting, processing and providi...Show More
This paper presents a model, which combines visual topics and regional contexts to automatic image annotation. Regional contexts model the relationship between the regions, whereas visual topics provide the global distribution of topics over an image. Previous image annotation methods neglected the relationship between the regions in an image, while these regions are exactly explanation of the ima...Show More
With the rapid development of pervasive computing, more and more sensors based applications have been implemented. And many problems occur in the process of providing stable basis for the normal working of these systems. One of them is how to continuously monitor/capture and interpret the environment related information efficiently to assure high context awareness. Many attentions have been paid t...Show More
With the rapid development of the information technology, it is inevitable that the distributed mobile computing will evolve to the pervasive computing gradually whose final goal is fusing the information space composed of computers with the physical space in which the people are working and living in. Therefore, pervasive applications need a middleware that can detect and act upon any context cha...Show More
ISyRAmI (Intelligent Systems Research for Ambient Intelligence) proposed by IST is an Artificial Intelligence oriented methodology and architecture for the development of Ambient Intelligence (AmI) systems. The ISyRAmI architecture considers the following four modules: Data/Information/Knowledge acquisition; Data/Information/Knowledge storage, conversion, and handling; Intelligent Reasoning; and D...Show More