JUSPN, volume-05 , Issue 2 (2014), PP 21 - 28
Published: 29 Apr 2014
by Valderi R. Q. Leithardt, David Nunes, Anubis G. M. Rossetto, Carlos O. Rolim, Cláudio F. R. Geyer, Jorge Sá Silva from Federal University of Rio Grande do Sul - Institute of Informatics – GPPD - Porto Alegre, RS - Brazil University of Coimbra Department of Informatics Engineering Pólo II, Pinhal de Marrocos, Coimbra - Portugal
Abstract: The identification of users in pervasive and ubiquitous environments can be performed using various devices and techniques, among which the use of wireless sensor networks (WSN), radio frequency identifiers (RFID), Smartphones, Bluetooth, among others. However, it is necessary to implement management techniques and control privacy of these heterogeneous environments. Thus, we performed a study using artificial neural networks in order to perform the processing of information identified only generating an output of information to Percontrol. read more... read less...
Keywords: Pervasive Computing, Routing, Wireless Sensor Networks, Artificial Neural Networks.
A Micro Simulated and Demand Driven Supply Chain Model To Estimate Regional Production and Consumption Relations
JUSPN, volume-05 , Issue 2 (2014), PP 16 - 20
Published: 17 Apr 2014
by Omar Abed, Tom Bellemans, Gerrit K. Janssens, Ansar Yasar, Davy Janssens, Geert Wets from Transportation Research Institute (IMOB),Hasselt University, Wetenschapspark 5 box 6, B-3590 Diepenbeek, Belgium Research group Logistics, Hasselt University, Agoralaan Gebouw D, B-3590 Diepenbeek, Belgium
Abstract: The various operations of production, distribution and consumption of goods make up supply chain networks. The usual pre requisite to model freight flows on between geographical zones, is an understanding of intra zonal production and consumption relations. This is in essence an aggregation of all individual firm to firm interactions taking place in form of production and consumption of goods, as well as transportation firms involved in the goods exchange process. In this paper, a demand driven micro-simulated supply chain model is presented. The presented model is a microsimulation model modeling the main firm types present in a traditional supply chain. It is a demand driven model using quantity of goods requested at the consumer side as a starting point. The different interacting firms use a modified Economic Order Quantity (EOQ) model as the basis of the simulation process. The cost function used includes also transportation and labor costs. The model simulates also shipping and carrying firms and takes into account raw material suppliers able to supply all or some subcomponents needed by production firms. Different initial conditions can be used to mimic real life firm to firm interactions. Firm level and zone level scenarios are simulated and results are shown. read more... read less...
Keywords: supply chain microsimulation, production-consumption tables, optimized location choice
JUSPN, volume-05 , Issue 2 (2014), PP 09 - 15
Published: 17 Apr 2014
by Stéphane Galland, Ansar-Ul-Haque Yasar, Luk Knapen, Nicolas Gaud, Tom Bellemans, Davy Janssens from Multiagent Group, IRTES-SET, UTBM, 90010 Belfort cedex, France Transportation Research Institute (IMOB), Hasselt University, Belgium
Abstract: Carpooling is an emerging alternative transportation mode that is eco-friendly and sustainable as it enables commuters to save time, travel resource, reduce emission and traffic congestion. The procedure of carpooling consists of a number of steps namely; (i) create a motive to carpool, (ii) communicate this motive with other agents, (iii) negotiate a plan with the interested agents, (iv) execute the agreed plans, and (v) provide a feedback to all concerned agents. The state-of-the-art research work on agent-based modeling is limited to a number of technical and empirical studies that are unable to handle the complex agent behavior in terms of coordination, communication and negotiations. In this paper, we present a conceptual design of an agent-based model (ABM) for the carpooling a that serves as a proof of concept. Our model for the carpooling application is a computational model that is used for simulating the interactions of autonomous agents and to analyze the effects of change in factors related to the infrastructure, behavior and cost. In our carpooling application, we use agent profiles and social networks to initiate our agent communication model and then employ a route matching algorithm, and a utility function to trigger the negotiation process between agents. We plan to, as a part of the future work, develop a prototype of our agent-based carpooling application based on the work presented in this paper. Furthermore, we also intend to carry out a validation study of our results with real data. read more... read less...
Keywords: Carpooling Problem, Multi-agent simulation, Organizational Model, Janus Platform
JUSPN, volume-05 , Issue 1 (2014), PP 25 - 31
Published: 01 Jan 2014
by Christina Strohrmann, Julia Seiter, and Gerhard Tröster from Wearable Computing Lab., ETH Zurich, Zurich, Switzerland
Abstract: Most runners run by themselves and do not have access to a trainer for feedback on their running form. We thus investigated the use of a standard smartphone for feedback provision while running, which is available to almost everyone. We investigated the use of body-worn sensors for assessing running technique on the example of arm carriage. In a pre-study with 10 runners, we found that arm carriage can be monitored by a single sensor on the upper arm. We developed an Android application to monitor arm carriage in real time. The application was validated in a user study with 23 participants. Results from questionnaires revealed high user acceptance read more... read less...
Keywords: Wearable Technology, Running, Feedback, Signal Processing
JUSPN, volume-05 , Issue 1 (2014), PP 17 - 24
Published: 31 Dec 2013
by S.M.F.D Syed Mustapha, Hui Na Chua from Faculty of Information and Technology, Universiti Tun Abdul Razak, Malaysia Faculty of Science and Technology Science, Sunway University, Malaysia
Abstract: As communication networks have evolved towards IP (Internet Protocol) networks, telecommunication operators has expanded its reach to internet multimedia web content services while operating circuit-switch networks in parallel. With the adoption of SOA (Service Oriented Architecture) that enables service capability interfaces to be published and integrated with other service capabilities into new composite service, service composition allows telecommunication providers to accelerate more new services provisioning. From the perspective of telecommunication providers to deliver integrated composite service from different providers and different network protocols, this paper is aimed to present the current service composition based on middleware approaches; discuss the requirements of meeting the challenges; and compare the approaches. read more... read less...
Keywords: Service Composition Converged Services, Middleware.
JUSPN, volume-05 , Issue 1 (2014), PP 09 - 16
Published: 31 Dec 2013
by Navid Rezaei, Deyasini Majumdar, Bruce Cockburn, Christian Schlegel from Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada, T6G 2V4 Department of Electrical and Computer Engineering, Dalhousie University, Halifax, Canada,
Abstract: The wireless transfer of energy through living tissues for the purpose of data communications is investigated. After considering the best frequency band for communications in biological tissues, both the uplink and downlink near-field coupled energy transfer options are analyzed. The possibility of wireless powering using the same frequency band is also studied. The nominal power consumption of the implantable baseband communications circuitry was estimated for smaller technology nodes using the Synopsys CAD tools. The effect of using the ultra-low power subthreshold operation in different technology nodes was also analyzed using predictive technology models. By introducing an analysis flow and the corresponding implementation code, we were also able to predict the subthreshold power consumption of the circuitry in different technology nodes and importantly at the gate level. read more... read less...
Keywords: near-field, link budget, implant, wireless communications, ultra-low power, subthreshold
Detecting Primary User Emulation Attacks in Cognitive Radio Networks via Physical Layer Network Coding
JUSPN, volume-05 , Issue 1 (2014), PP 01 - 08
Published: 31 Dec 2013
by Xiongwei Xie, Weichao Wang from Department of SIS, UNC Charlotte, Charlotte, NC, 28223, USA
Abstract: Primary user emulation (PUE) attacks on cognitive radio networks pose a serious threat to the deployment of this technique. Previous approaches usually depend on individual or combined received signal strength (RSS) measurements to detect emulators. In this paper, we propose a new mechanism based on physical layer network coding to detect the emulators. When two signal sequences interfere at the receiver, the starting point of collision is determined by the distances among the receiver and the senders. Using the signal interference results at multiple receivers and the positions of reference senders, we can determine the position of the ‘claimed’ primary user. We can then compare this localization result with the known position of the primary user to detect the PUE attack. We design a PUE detection mechanism for wireless networks with trustworthy reference senders. We analyze the overhead of the proposed approach and study its detection accuracy through simulation. read more... read less...
Keywords: Cognitive Radio Networks, Primary User Emulation, Physical Layer Network Coding.