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A highly sensitive and label-free amperometric immunosensor has been developed for the detection of carcinoembryonic antigen (CEA) based on layer-by-layer (LBL) assembly of gold nanoparticles (GNPs), multi-walled carbon nanotubes-thionine (MWNTs-THI) and chitosan (CHIT) on 3-mercaptopropanesulfonic, sodium salt (MPS)-modified gold electrode surface by(More)
In next generation network, various heterogeneous wireless access networks are expected to integrate to support user's seamless connection. In this system, efficient and reliable network selection schemes are required for users to choose a suitable network among all the available networks. In this paper, an adaptive network selection algorithm based on user(More)
Different kinds of wireless access systems will be integrated in next generation network. To support seamless mobility between these heterogeneous wireless access networks, efficient and reliable vertical handoff schemes are required. In this paper, a survey on vertical handoff decision algorithms is given and the algorithms are described, analyzed and(More)
Proactive handoff is expected to be one of the distinct feature of 4G heterogeneous wireless systems, which is obviously different from the passive handoff commonly existed in traditional cellular systems. Users with multi-network interface terminals can actively and easily handoff to access network for better QoS satisfaction at a minimum expense, on the(More)
Nano-Au and methylene blue (MB) were assembled layer-by-layer (LBL) into films on the glassy carbon electrode modified by thiourea for detection of human chorionic gonadotrophin (HCG). The electrode modification process was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron micrograph (SEM). The(More)
Wireless Body Area Networks (WBANs) are made up of tiny physiological sensors implanted in/on the human body that communicate with a coordinator. The specific characteristics of WBANs propose challenges and difficulties on resource allocation, coordinator deployment and service Quality of Service (QoS) guarantee, etc. In this paper, jointly considering the(More)
Next generation wireless network (NGWN) is expected to integrate different access technologies, including cellular network, WLAN and mobile Ad Hoc network, etc. In NGWN, the heterogeneity and the diversity of access networks, and various user applications with different QoS requirements pose new challenging on multi-mode mobile terminal (MT), particularly,(More)
In next generation wireless network (NGWN), mobile users are capable of connecting to the core network through various heterogeneous wireless access networks, such as cellular network, wireless metropolitan area network (WMAN), wireless local area network (WLAN), and ad hoc network. NGWN is expected to provide high-bandwidth connectivity with guaranteed(More)
In recent years, vehicular ad-hoc network (VANET) has received considerable attention. In VANET, safety application and user Internet accessing related application are expected to be supported. However, the characteristics of VANET, including high-speed mobility, channel fading property, channel competition mechanism, and various quality of service (QoS) of(More)