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Journal of Mobile Multimedia

Editor-in-Chief: Kwang-Cheng Chen, University of South Florida, USA


ISSN: 1550-4646 (Print Version),

ISSN: 1550-4654 (Online Version)
Vol: 6   Issue: 1

Published In:   March 2010

Publication Frequency: Quarterly


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Ubiquitous Information Transfer across Different Platforms by QR Codes


Yo-Ping Huang1, Yueh-Tsun Chang2 and Fronde Eika Sandnes3

1Department of Electrical Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan
2Department of Computer Science and Engineering, Tatung University, Taipei, 10451 Taiwan
3Faculty of Engineering, Oslo University College, Oslo, Norway

Abstract: [+]    |    Download File [ 950KB ]

Abstract: Since the notion of ambient intelligence was proposed in the 90s, many researchers and companies have developed devices, applications and systems based on the idea of an intelligence environment. Despite the obvious benefits of ambient intelligent environments there are few examples of real-world realizations. One reason is that systems are developed in isolation according to their particular purpose. In fact, there are many systems that serve similar and overlapping functions in different situations, but these systems cannot easily be merged into one intelligent system. For example, a museum guiding system allows tourists through handheld devices to browse exhibition contents including text, pictures, audio, video, etc. However, often tourists cannot easily share information with each other when they come across interesting items. In order to help simplify sharing, we present five information encoding types based on Quick Response Codes (QR Code) that facilitate the connection of independent systems implemented on different platform such as smart phones or Java phones. Two case studies illustrating the use of these encoding types are presented. The first system is a travel assistant system where the traveler can share information through QR Codes and a “Schedule Code” which provides references to specific sites. The second system, the Mobile Bird Information Searching System allows discovered multimedia to be shared across smart phones to Java phones via QR Codes.

Keywords: User Interface, QR Code, Ubiquitous Computation

Activity Inference for RFID-based Assisted Living Applications


Judith Symonds, Boon-Chong Seet and Jingwen Xiong

Faculty of Design and Creative Technologies, Auckland University of Technology City Campus, Auckland 1010, New Zealand

Abstract: [+]    |    Download File [ 162KB ]

Abstract: Technology assisted living is a practical solution to the increasing demands for access to healthcare services in an era of aging populations and dwindling supply of professional healthcare workers. Radio Frequency Identification (RFID) technology with complementary sensors is widely considered as a very promising approach to realizing the vision of technology assisted living. At the core of any assisted living systems is the important function of human activity inference, which is what enables such systems to be intelligently perceptive and responsive to the humans under their care. In this paper, we review the current state-of-the-art in activity inference for RFID-based assisted living applications, and present our ongoing work on an assisted living prototype for ‘goal training’ or brain rehabilitation of patients with cognitive impairment in their home environments, with a discussion on the potential design issues involved

Keywords: Activity Inference, Radio Frequency Identification, Assisted Living, Goal Training

Ubiquitous Web for Ubiquitous Environments: The Role of Embedded Semantics


Ahmet Soylu1, Patrick De Causmaecker1, and Fridolin Wild2

1K.U. Leuven, Interdisciplinary Research on Technology Education and Communication (iTec), Kortrijk, Belgium
2The Open University, Knowledge Media Institute (KMI), Milton Keynes, United Kingdom

Abstract: [+]    |    Download File [ 191KB ]

Abstract: Pervasive Computing enlarged the traditional computing setting into the human layer of the earth. Different devices in pervasive environments are seamlessly integrated in various ways. Examples are wired and wireless networks, infrared connections, Bluetooth etc. Apart from these local ties, pervasive computing environments are mostly connected with the World Wide Web environment as the simple most important digital information layer. In this paper we propose an approach, a conceptual upper context model and a service oriented framework for exploiting the vast amount of valuable information contained by the World Wide Web for the benefit of context-aware pervasive computing environments. Machine understandability of the web information is the key challenge for our purpose since a typical pervasive setting covers a variety of devices with different characteristics. We base our approach and models on semantic web activities, particularly on Embedded Semantics, which are of crucial importance for bringing structure into the World Wide Web. We first propose a conceptual upper context model, and then based on this model we propose a web harvesting approach and a service oriented application framework. Finally we demonstrate and evaluate our approach and models through examples which are based on specific scenarios, each representing a different perspective, and we partially realize our approach and the framework for the e-Learning domain.

Keywords: Pervasive Computing, Ubiquitous Computing, context awareness, Semantic Web, ontologies, Embedded Semantics, Microformats, RDFa, eRDF, e-Learning

Extendible Context-Aware Service System For Mobile Computing


Been-Chian Chien, Shiang-Yi He, Hsin-Chan Tsai, and Yuen-Kuei Hsueh

Department of Computer Science and Information Engineering National University of Tainan, Tainan, Taiwan, R. O. C.

Abstract: [+]    |    Download File [ 331KB ]

Abstract: Context-aware computing is one of the research fields in pervasive computing and mobile computing. Context-aware systems can react to the user’s preference according to the circumstances called context including location, time and other environment conditions. Many context-aware computing paradigms were developed in recent year; however, it is difficult for the present systems to extend the application domains and interoperate with other service systems due to the problem of heterogeneity among systems. In this paper, an extendible context-aware service system importing the concept of context independence is proposed and designed. The main idea of context independence includes the physical context independence and the logical context independence. The approaches of constructing context independence are also provided for the proposed system architecture. The context-aware system thus can easily integrate different service domains and diverse devices into a unifying environment.

Keywords: Context-aware, mobile computing, ambient intelligence, context independent

Motion Extraction via Human Motion Analysis


Joseph C. Tsai1, Hui-Huang Hsu2, Shin-Ming Chang2, Ying-Hong Wang2, Chia Cheng Chao4 and Timothy K. Shih5

1Department of Computer Sci. and Information Engineering, Tamkang University, Taiwan
2Department of Computer Sci. and Information Engineering, Tamkang University, Taiwan
3Information Science department of National Taipei University of Education
4Department of Computer Science and Information Engineering, Asia University, Taiwan

Abstract: [+]    |    Download File [ 1305KB ]

Abstract: We propose a novel motion analysis algorithm by using the mean-shift segmentation and motion estimation technique. Mean shift algorithm is frequently used to extract objects from video according to its efficiency and robustness of non-rigid object tracking. For diminishing the computational complexity in searching process, an efficient block matching algorithm: cross-diamond-hexagonal search algorithm was used. In the motion analysis procedure, the stick figure of object obtained by thinning process is treated as guidance to gather the statistics of motion information. The experimental results show that the proposed method can provide precise description of the behavior of object in several video sequences and extrapolate human motion seamlessly by combining different motion clips obtained from other video sequences.

Keywords: Motion analysis, Object tracking, Object segmentation, Motion extrapolation

G2G: Location-aware Mobile Social Networking with Applications in Personalized Recommender Systems


Ioannis T. Christou and Sotiris Michalakos

Athens Information Technology, Athens, Greece

Abstract: [+]    |    Download File [ 697KB ]

Abstract: We present G2G, a proximity-aware social networking platform for Mobile Information Device (MID) users and its applications in personalized travel assistance via location-aware recommender systems. User proximity to a friend or a place or event is determined via GSM cell information and enhanced via GPS information if the mobile device has such capability. GSM cell information alone is greatly enhanced through the concept of user-defined “hotspots” which is the means that allows the system to expand the notion of proximity to include not only users covered by the same GSM cell but also users and/or hotspots covered by geographically neighboring cells. The system can be thought of as a Selective Dissemination of Information platform where users subscribe to it and are willing to receive selectively information coming from their own personal network of friends and acquaintances, and if they opt for, from other system users as well, in the form of location-aware notes about nearby places. G2G continuously and actively disseminates to users information relevant to their current location within a user-defined radius. This information is published into the system by the users themselves who can recommend a place or event. To bootstrap the system with sufficient content however that makes the use of the system appealing to users, we have developed Web Information Extraction methods that extract relevant data from web pages that contain recommendations about public places and/or events that can be geo-located using publicly available GIS services such as Google Earth APIs. Regarding its Social Networking aspects, the system allows users to see nearby friends and chat with them, as well as block selected friends from seeing them. The system also acts as a personalized tourist guide providing visitors of outdoors cultural heritage sites multimedia presentations about the site on the spot.

Keywords: Wireless computing, Mobile Social Networking, Location-based Services

River Publishers: Journal of Mobile Multimedia