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10 1541-1672/10/$26.00 © 2010 IEEE IEEE INTELLIGENT SYSTEMS Published by the IEEE Computer Society

continually evolving everyday objects for nonexpert users. Smart environments have rapidly emerged as an exciting new paradigm that tends to include different research fi elds such as ubiquitous, pervasive, and grid com-puting. Such environments aim to provide computing and communication services in a far more convenient, seamless, and enjoy-able way. Users will be enjoy-able to easily, conve-niently, and remotely access and control all

information and appliances in their environ-ment, using various services resulting from the integrated cooperation of possibly het-erogeneous communication-enabled objects. However, realizing the services’ advantages will require appropriate middleware support to facilitate context-dependent intelligent agents, thus leveraging cost-effective design and implementation of smart-environment applications.

Hamid R. Arabnia, University of Georgia Wai-Chi Fang, National Chiao Tung University Changhoon Lee, Hanshin University

Yan Zhang, Simula Research Laboratory and University of Oslo

W

elcome to this special issue on the latest research and development in

context-aware middleware and intelligent agents for smart

environ-ments. Smart environments—smart homes, smart offi ces, smart schools, and so

on—represent advanced communication and computing environments featuring

G U E S T E D I T O R S ’ I N T R O D U C T I O N

Context-Aware Middleware

and Intelligent Agents

for Smart Environments

IS-25-02-Gei.indd 10

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MARCH/APRIL 2010 www.computer.org/intelligent 11

The fi ve articles in this special issue focus on recent advances in context-aware middleware, frameworks, and intelligent agents for smart environ-ments. The fi rst article, “Code-Centric RFID System Based on Software Agent Intelligence,” by Min Chen and his col-leagues, discusses a code-centric RFID system based on an agent intelligence scheme that can potentially achieve faster service responses. This system replaces traditional ID numbers with codes indicating the service that the RFID tag bearer needs for improved system response.

In “Adaptive Body Posture Analy-sis for Elderly-Falling Detection with Multisensors,” Chin-Feng Lai and his colleagues explore the detection of body behavior modes and accidental-falling incidents by using collaborative sensors. Sensors distributed over the body detect position and motion in-formation, which is transmitted via ra-dio transmission to a computer. Under gravity, the direction of force on each limb of the body varies, so the authors consider these characteristics in their analysis of collaborative sensor detec-tion. Because everyone has different living habits, manifestations of poses differ as well. Therefore, this system uses an adaptive adjustment model to more accurately detect an elderly per-son’s body posture.

The next article, “Context-Aware Emotion-Based Model for Group Decision Making,” by Goreti Mar-reiros and her colleagues, presents a context-aware model of emotions that can be used to design intelligent agents endowed with emotional capa-bilities for simulating group decision-making processes. Their experiments show that agents endowed with emo-tional awareness achieve agreements more rapidly than those without such awareness.

In “Context-Aware Middleware for Multimedia Services in Heterogeneous

Networks,” Liang Zhou and his colleagues present an effi cient context-aware middleware system for facili-tating diverse multimedia services in heterogeneous-network environ-ments. The authors fi rst present their adaptive service-provisioning middle-ware for handling the heterogeneity of diverse networks and enabling ser-vice provisioning to mobile users and professionals anywhere and anytime. Then, they present a context-aware multimedia middleware framework that supports diverse multimedia ser-vices, including multimedia content fi ltering, recommendation, adaptation, aggregation, learning, reasoning, and delivery.

The last article, “Large-Scale Middleware for Ubiquitous Sensor Networks,” by Young-Sik Jeong and his colleagues, discusses the design and implementation of a server-side middleware system called Lamses (Large-Scale Middleware for Ubiqui-tous Sensor Networks). Using novel functionalities, Lamses collects and

stores large-scale sensor data in a ubiquitous sensor network. Lamses provides most of the basic function-alities of existing USN middleware. But it also analyzes collected data and status information of events, gen-erates lightweight large-scale sensed data, and provides suitable event processing.

W

e hope you enjoy reading the great selection of articles in this special issue!

Acknowledgments

We’d like to express our gratitude to EIC Fei-Yue Wang for his advice and patience regarding this special issue. In addition, we thank the anonymous reviewers for spend-ing so much of their precious time review-ing all the papers submitted. Their timely reviews and comments greatly helped us select the best articles for this special issue. We also thank all the authors who submitted their work for consideration in this issue.

T H E A U T H O R S

Hamid R. Arabnia is a full professor of computer science at the University of Georgia. His research interests include parallel and distributed processing techniques and algorithms, interconnection networks, data mining, and information engineering and applications. He has a PhD in computer science from the University of Kent in Canterbury, England. Contact him at hra@cs.uga.edu.

Wai-Chi Fang is the director of the System-on-Chip Research Center and is the TSMC Distinguished Chair Professor of National Chiao Tung University in Hsinchu, Taiwan. His research interests include intelligent information and communication systems, green biomedical circuits and systems, intelligent electronics, and VLSI and SoC chip imple-mentation. He has a PhD in electrical engineering from the University of Southern Cali-fornia. He is a Fellow of the IEEE. Contact him at dr.wfang@gmail.com.

Changhoon Lee is a professor in the School of Computer Engineering at Hanshin Univer-sity in Korea. His research interests include information security, digital forensics, cryp-tology, ubiquitous and pervasive computing, and context awareness. He has a PhD in information security from Korea University. He is a member of the IEEE, the IEEE Com-puter Society, the IEEE Communications Society, the International Association for Cryp-tologic Research, the Korean Institute of Information Security and Cryptology, and the Korean Information Processing Society. Contact him at changhoonlee08@gmail.com.

Yan Zhang leads the Wireless Networks Research Group at Simula Research Laboratory in Norway, where he is also a part-time associate professor at the University of Oslo. His research interests include resource, mobility, spectrum, energy, and data management in wireless communications and networking. He has a PhD from Nanyang Technological Uni-versity in Singapore. He is a member of IEEE and the ACM. Contact him at yanzhang@ simula.no.

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