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We describe CARDIAC, a prototype for an intelligent conversational assistant that provides health monitoring for chronic heart failure patients. CARDIAC supports user initiative through its ability to understand natural language and connect it to intention recognition. The spoken language interface allows patients to interact with CARDIAC without special training. We present speech recognition results...
Autonomic computing is a new technology to solve crisis of software complexity which means to hide the complexity of system management from human users by means of technologies managing technologies, to establish guidable, state-aware, and self-adaptive computer systems. According to the analysis of domestic and foreign representative literature, this paper makes an overview on concept of autonomic...
This paper presents a new automatic system for on-line change detection in structural health monitoring. The system is based on a combination of a Hopfield neural network with an adaptive kernel density estimation method and a test for unimodality. The changes in the process being monitored are detected from a model of that process. A Hopfield neural network is used on-line to adapt the model, tracking...
This paper proposes the inclusion of two traffic forecasting frameworks in traffic sampling paradigm. The proposed frameworks: namely, the pattern forecasting and the attack forecasting, predicts the occurrence of traffic deviation and examines the existence of malicious attack in the traffic deviation, respectively. While the former utilizes the ARAR model to forecast the network traffic, the latter...
Freeway monitoring is one of the key elements in ITS (intelligent transportation system). Moving vehicle extraction is an important preprocessing step in freeway monitoring. It has great influence on the following steps, such as object tracking, classification and behavior analysis. This paper presents an effective method to extract moving objects. Our approach proved to be robust to sudden light...
The size, heterogeneity and dynamism of the execution platforms of scientific applications, like computational grids, make using those platforms complex. Furthermore, today there is no effective and relatively simple solution to the programming of these applications independently of the target architectures. Using the master-worker paradigm in software components can provide a high level abstraction...
Ad hoc network has dynamic topology and large-scale nodes, for the purpose of monitoring and measurement in Ad hoc network, this paper proposes a new frame method of hierarchy model for monitoring, i.e., clusterhead selection mechanism. The mechanism designed a weight formula to handle the comprehensive update considering several factors such as distance, mobile rate, energy during the model establishment...
With the increase in society's dependence on IT communication systems, the need for dependable, trustable, robust and secure adaptive systems becomes ever more acute. Modern autonomic message-oriented middleware platforms have stringent requirements for self-healing, adapting, evolving, fault-tolerance, security and active vulnerability assessment, especially when the internal working model of a system...
Complex service-oriented systems comprise humans and software services spanning multiple organizations. These systems are highly dynamic, because services, processes, and teams are not only diverse but they also constantly evolve. Therefore, these systems introduce a variety of challenges on how to adapt services, processes, and teams to changing situations. We contribute with our approach to address...
Software needs to evolve to ensure it continuously relevant in supporting the needs of an organization. Thus, software evolution is unavoidable for its survival. Due to rapid changes in business environment and advancement of technology, simplifying software evolution becomes more challenging and may involve high cost. Approaches in simplifying software evolution via software adaptation have been...
Context is a significant factor in deciding the set of requirements relevant to a system (i.e., software product construction), the alternatives the system can adopt to satisfy these requirements, and the quality assessment of each alternative. By context we mean the conditions in the operating environment of an system that influences how the system should behave in different situations. However,...
In the context of the DEHEMS project, aimed at analyzing real-time sensor readings related with the energy performance of individual households, the research and development stages of various modules have underlined the need for a fast and scalable means of generating large amounts of high quality sensor data. This paper introduces a multi-purpose sensor simulation system (DS3) that successfully meets...
Various fields of human activity (management, politics, marketing, medicine, etc.) are involved in estimating the current state and predicting the development of some complex system or process with imprecise and unreliable data. In this paper, we introduce an approach that can help deal with such tasks. We describe the approach and demonstrate it by the example of the problem of microelectronic design...
We focus on non-functional requirements for applications offered by service integrators; i.e., software that delivers service by composing services, independently developed, managed, and evolved by other service providers. In particular, we focus on requirements expressed in a probabilistic manner, such as reliability or performance. We illustrate a unified approach-a method and its support tools-which...
Data stream management systems (DSMSs) usually need to satisfy multiple QoS requirements of applications, including timing and precision constraints. This paper focuses on the problem of real-time query model and scheduling in a DSMS to meet multiple performance objectives. At first, a mixed real-time query model is introduced which is composed of periodic, continuous and one-time queries with deadlines...
Unlike the traditional paper-and-pencil tests, computer adaptive testing (CAT) presents the next item based on his or her past responses, which is more appropriate for a particular individual. However, it is rarely seen in a smaller-scale scenario, such as in classrooms or business, because of the complexity of Item Response Theory (IRT) and the possible usages of services may not be known or may...
Quality of individual services is substantial to guarantee high performance and availability of overall composite service oriented systems. This requires the process of diagnosing service quality degradation and responding to it in a timely and non-stopping manner. This paper presents a modeling-based approach to coordinate the process of Web service management, configuring parameters or invoking...
The cost of a large wireless sensor network consisting of hundreds of devices may only be justified if it is deployed for multiple monitoring tasks. Introducing multiple tasks to the system however raises concerns regarding resource contention and quality of service (QoS). For example, rapid response tasks may have strict requirements with regards to data delivery latency, whereas data gathering tasks...
Nowadays, technologies are providing the mobile terminals with much more powerful computational abilities. Such improvement made it possible to run many complex applications on mobile devices. However, many of these new applications are also resources demanding. Lacking sufficient resources would cause performance failures and impact negatively on the users' quality of experience. In order to improve...
Incorporating game with intelligent learning environment has always been a subject for research and development in intelligent tutoring system(ITS). This paper proposes a new design of artificial pet game-based ITS(APGITS) which makes use of the design experiences of both traditional ITS and artificial pet games. The pet module in APGITS are flexibly designed, which does track the learner's activities...
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