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IFIP Wireless Days, WD

作者： Christos Bouras Georgios Diles Vasileios Kokkinos Andreas Papazois Computer Technology Institute and Press “Diophantus” Patras Greece Computer Engineering and Informatics Dept. University of Patras Greece

The use of femtocells has been an attractive solution since it achieves better coverage and capacity and low cost for deployment and maintenance. However, their performance can be compromised by the cross-tier interference with existing macrocell infrastructure or between adjacent femtocells, especially in the case of co-channel deployment. One way to address this, is adjusting the transmit power of every femto base station with respect for overall performance. To this direction, we have implemented a framework that simulates femtocell overlays over LTE-Advanced (LTE-A) macrocellular systems. The framework allows power management over user-defined femtocell deployment, deciding their power levels according to three different power schemes. The resulting throughput is presented for every point of the macrocell in a user-friendly GUI. In this paper, we present the design of this framework and discuss the results.

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QoS-Aware User Cohabitation Coordinator in Cognitive Radio Networks

QoS-Aware User Cohabitation Coordinator in Cognitive Radio N...

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IEEE Global Communications Conference

作者： Berk Canberk Ian F. Akyildiz Sema Oktug Dept. of Computer Engineering Computer and Informatics Faculty Istanbul Technical University Broadband Wireless Networking Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology

ISBN: (纸本)9781467309202

In Cognitive Radio (CR) Networks, the licensed but vacant spectrum bands are shared by the unlicensed users (CR users) in an opportunistic manner. The CR users should operate and cohabit in the licensed bands without causing any interference to the Primary Users (PUs). This CR user cohabitation which is managed by a spectrum Coordinator, enables several design challenges. Therefore, A User Cohabitation Coordinator, UCC, should be designed considering the heterogeneous Quality of Service (QoS) requirements for the CR users and the short-term fluctuations in the available licensed spectrum bands. Moreover, the spectrum coordination among the CR network operators for CR users should also be considered by the UCC for an effective and fair spectrum sharing. Considering these challenges, the main contribution of this paper is to design a QoS-based spectrum coordinator for CR user cohabitation in order to achieve high throughput and fairness. The proposed UCC uses the first-difference filter clustering and correlation based PU modeling to integrate the fluctuations of the PU activities into the spectrum sharing. The UCC characterizes the QoS requirements of CR users by adopting queuing theoretic models. The proposed scheme enables the cohabitation of the CR operators dynamically. The evaluations demonstrate that the proposed UCC provides high throughput while maintaining the fairness in the CR networks.

关键词： Cohabitation chromium ULTRA CLEAN COAL Cognitive radio Coordinator Spectra Consumers Radio networks

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Facilities offered by the Banks and Expectations of IT Savvy Banking Customers

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Procedia - Social and Behavioral Sciences 2012年 40卷 576-583页

作者： Luxmy Vivekanandan Sanath Jayasena Dept of Computing Informatics Institute of Technology Colombo Sri Lanka Dept of Computer Science & Engineering University of Moratuwa Moratuwa Sri Lanka

The banking industry across the globe has witnessed a revolution in the last two decades in its efforts to meet the ever growing customer demands. The advancement of technology has encouraged many organisations to move across markets to position themselves as multinationals and the Sri Lankan banking sector is no different. Continuous analysis of customer demands has driven the banks to rely heavily on technology thereby crowding the markets with many products and services. Sri Lankan banks today are continuing to introduce innovative electronic banking solutions to their customers. The question however is: How much of these electronic banking solutions are actually used by the customers? This study was conducted to identify the consumer response on facilities offered by the bank. A survey was conducted and data collected from 404 banking customers in the Colombo district were analysed. Results of the survey reveal that the topmost facilities demanded from the bank are accurate and secure services. The ATM is ranked as the third and the usage is 80%. The research concludes that customers expect the bank to provide a high level of service more than the electronic-based solutions per se.

关键词： Electronic Banking Retail Banking Customer Banking Habits

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TRAFIL: A tool for enhancing simulation TRAce FILes processing

TRAFIL: A tool for enhancing simulation TRAce FILes processi...

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3rd International Conference on Data Communication Networking, DCNET 2012, 7th International Conference on e-Business, ICE-B 2012 and 3rd International Conference on Optical Communication Systems, OPTICS 2012

作者： Bouras, Christos Charalambides, Savvas Kioumourtzis, Georgios Stamos, Kostas Computer Technology Institute and Press University Campus N. Kazantzaki Str. 26504 Rio Greece Computer Engineering and Informatics Dept. University of Patras Patras Greece Technological Educational Institute of Patras Patras Greece Center for Security Studies P. Kanellopoulou 4 10177 Athens Greece

ISBN: (纸本)9789898565235

NS-2 (Network Simulator) is one of the most popular discrete event simulators used for network simulation. Trace files produced by NS-2 provide very useful information for post simulation analysis. This paper presents the architecture and development considerations for a TRAce FILe analysis tool, which intends to simplify the management of trace files generated during network simulations. The tool is focused on NS-2 trace files, but can be extended to handle a variety of simulation trace files formats. Its purpose is to make the execution of a large number of network simulations faster, and the extraction of results from a large amount of data more flexible and productive. TRAFIL introduces a novel way of interpreting, parsing, reading and eventually utilizing NS-2 trace files by using "metafiles" and "sub-metafiles" during the trace file recognition and process procedures, making the overall operations more abstract, substantially efficient and faster than alternative approaches. Furthermore, TRAFIL facilitates the whole trace file analysis task, offering the opportunity to store each trace file as well as every measurement produced for each trace file. The tool aims to aid the analysis of simulation results offering features that other tools in this area have been missing.

关键词： Trace analysis

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Associative information processing in parahippocampal place area (PPA): An fMRI study

Associative information processing in parahippocampal place ...

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2012 International Conference on Brain informatics, BI 2012

作者： Li, Mi Han, Dongning Lu, Shengfu Liu, Zheng Zhong, Ning School of Computer and Communication Engineering Liaoning ShiHua University Liaoning 113001 China International WIC Institute Beijing University of Technology Beijing 100024 China College of Optical and Electronical Information Changchun University of Science and Technology Jilin 130022 China Dept. of Biomedical Engineering Tianjing University Tianjing 300072 China Dept. of Life Science and Informatics Maebashi Institute of Technology Maebashi-City 371-0816 Japan Beijing Key Laboratory of MRI and Brain Informatics China

ISBN: (纸本)9783642351389

The function of the parahippocampal place area (PPA) is a matter of debate. We investigated this issue in fMRI experiment by 36 normal subjects using two types of tasks: figure and text. Furthermore, the figure tasks contain two kinds of contextual associations: one is among items;the other is among items and their locations which refers to the spatial contextual associations. In contrast, the text tasks contain only item contextual associations - they do not have any spatial information. The results showed that the right PPA located at anterior lingual gyrus and left anterior parahippocampal gyrus nearby amygdala were significantly activated during both figure and text tasks, which indicate that the PPA is more involved in associative information processing. © 2012 Springer-Verlag.

关键词： Associative processing

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Robust face recognition using wavelet and dct based lighting normalization, and shifting-mean lda

Robust face recognition using wavelet and dct based lighting...

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1st International Conference on Pattern Recognition Applications and Methods, ICPRAM 2012

作者： Gede Pasek Suta Wijaya, I. Uchimura, Keiichi Koutaki, Gou Zhang, Cuicui Electrical Engineering and Computer Science Dept. Kumamoto University Kurokami 2-39-1 Kumamoto Shi Japan Electrical Engineering Dept. Mataram University Jl. Majapahit 62 Mataram Indonesia Department of Intelligence Science and Technology Graduate School of Informatics Kyoto University Kyoto Japan

ISBN: (纸本)9789898425980

This paper presents an integration of Wavelet and Discrete Cosine Transform (DCT) based lighting normalization, and shifting-mean Linear Discriminant Analysis (LDA) based face classifiers for face recognition. The aims are to provide robust recognition rate against large face variability due to lighting variations and to avoid retraining problem of the classical LDA for incremental data. In addition, the compact holistic features is employed for dimensional reduction of the raw face image. From the experimental results, the proposed method gives sufficient and robust achievement in terms of recognition rate and requires short computational time.

关键词： Lighting

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Articulated motion segmentation of point clouds by group-valued regularization

Articulated motion segmentation of point clouds by group-val...

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5th Eurographics Workshop on 3D Object Retrieval, EG 3DOR 2012

作者： Rosman, G. Bronstein, A.M. Bronstein, M.M. Kimmel, R. Dept. of Computer Science Technion - Israel Institute of Technology Haifa 32000 Israel School of Electrical Engineering Faculty of Engineering Tel Aviv University Ramat Aviv 69978 Israel Institute of Computational Science Faculty of Informatics Universitá della Svizzera italiana CH - 6904 Lugano Switzerland

ISBN: (纸本)9783905674361

Motion segmentation for articulated objects is an important topic of research. Yet such a segmentation should be as free as possible from underlying assumptions so as to fit general scenes and objects. In this paper we demonstrate an algorithm for articulated motion segmentation of 3D point clouds, free of any assumptions on the underlying model and yet firmly set in a well-defined variational framework. Results on scanned images show the generality of the proposed technique and its robustness to scanning artifacts and noise. © The Eurographics Association 2012.

关键词： Motion analysis

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A declarative approach for AGVs modeling and cyclic scheduling

Frontiers in Artificial Intelligence and Applications

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Frontiers in Artificial Intelligence and Applications 2012年 243卷 1942-1952页

作者： Grzegorz, Bocewicz Zbigniew, Banaszak Pawel, Pawlewski Koszalin University of Technology Dept. of Electronics and Computer Science Koszalin Poland Warsaw University of Technology Dept. of Business Informatics Warsaw Poland Poznań University of Technology Faculty of Engineering Management Poznań Poland

ISBN: (纸本)9781614991045

In this paper, we deal with the cyclic scheduling problem usually observed in the FMS producing multi-type parts where the AGVS plays a role of a material handling system. Finding the conditions guaranteeing the AGVs dead-lock-free and collision-free movement policy is the aim of this work. The AGVs co-sharing the common parts of the transportation route while executing repetitive processes, i.e. being assigned to AGVs passing along machines in a cyclic way, can be modeled in terms of Cyclic Concurrent Process Systems (CCPS). Schedulability analysis for a given CCPS answers the question whether a cyclic schedule exists or not. The paper suggests a novel approach for schedulability analysis employing the declarative modeling. The sufficient conditions guaranteeing CCPS schedulability are discussed and the recursive approach to their designing is proposed. © 2012 The authors and IOS Press. All rights reserved.

关键词： Constraint satisfaction problems

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Ontology-guided approach to retrieving disease manifestation images for health image base construction

Ontology-guided approach to retrieving disease manifestation...

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2012 IEEE 2nd Conference on Healthcare informatics, Imaging and Systems Biology, HISB 2012

作者： Chen, Yang Ren, Xiaofeng Zhang, Guo-Qiang Xu, Rong Dept. of Electrical Engineering and Computer Engineering Case Western Reserve University Cleveland OH 44106-7071 United States Intel Science and Technology Center on Pervasive Computing Seattle WA 98195 United States Division of Medical Informatics Case Western Reserve University Cleveland OH 44106-7291 United States

ISBN: (纸本)9780769549217

Building a comprehensive medical image database, in the spirit of the UMLS, can be beneficial for assisting diagnosis, patient education and self-care. However, a highly curated, comprehensive image database is difficult to collect as well as to annotate. We present an approach to combine visual object detection technologies with medical ontology to automatically mine web photos and retrieve a large number of disease manifestation images with minimal manual labeling. Comparing to a supervised approach, our ontology-guided approach reduces manual labeling effort to 1/10 on a variety of eye/ear/mouth diseases and improves the precision of retrieval by over 10% in many cases. © 2012 IEEE.

关键词： Ontology

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Ethologically inspired human-robot communication for monitoring support system in intelligent space

Ethologically inspired human-robot communication for monitor...

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10th IFAC Symposium on Robot Control, SYROCO 2012

作者： Ichikawa, Takuya Beppu, Wataru Kovács, Szilveszter Korondi, Peter Hashimoto, Hideki Niitsuma, Mihoko Dept. of Precision Mechanics Chuo University Tokyo Japan Department of Automation University of Miskolc Miskolc Hungary Computer and Automation Research Institute of the Hungarian Academy of Sciences Dept. of Mechatronics Optics and Applied Informatics Budapest University of Technology and Economics Budapest Hungary Dept. of Electrical Electronic and Communication Engineering Chuo University Tokyo Japan

ISBN: (纸本)9783902823113

This paper presents human-robot communication for a monitoring support system in an Intelligent Space. An Intelligent Space (iSpace) is a space in which many intelligent devices are installed to observe the user's environment. In this paper, we apply the iSpace observation function to a monitoring system used for maintaining the safety of elderly persons receiving home-care support. In addition, we use a mobile robot as a tool to deliver monitoring results to care assistants. We focus on an ethological approach for designing robot behaviors for human-robot communication. The implementation of these robot behaviors based on an ethological approach, and the results of an experiment conducted to evaluate these behaviors, are then presented. © 2012 IFAC.

关键词： Monitoring

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