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Introducing agent evictions to improve application placement in wireless distributed systems

Introducing agent evictions to improve application placement...

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41st International Conference on Parallel Processing, ICPP 2012

作者： Tziritas, Nikos Lampsas, Petros Lalis, Spyros Loukopoulos, Thanasis Khan, Samee Ullah Xu, Cheng-Zhong Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518067 China Dept. of Informatics and Computer Technology Technological Educational Institute of Lamia Lamia Greece Computer and Communication Engineering Dept. University of Thessaly Volos Greece Department of Electrical and Computer Engineering North Dakota State University Fargo ND 58108-6050 United States Department of Electrical and Computer Engineering Wayne State University Detroit MI 48202 United States Center for Research and Technology Institute of Thessaly Volos Greece

ISBN: (纸本)9780769547961

With the development of mobile code frameworks for embedded systems, an application can be structured as a set of cooperating components (agents) that are placed on the nodes of the system in a flexible way. Reducing the network traffic caused by the application components is a crucial issue for the increase in the lifetime of wireless embedded systems, since it is widely known that the communication cost plays the most significant role in the energy consumption of embedded devices. To this end, most placement algorithms place or move an agent towards the center of gravity of the communication workload. However, if the target node does not have enough capacity, the attempt is usually aborted. In this paper, we introduce eviction-enabled algorithms that allow nodes to free capacity by forcing a locally hosted agent to move to another node, even at a loss, to accept a new and potentially more beneficial agent. To the best of our knowledge, this is the first time that agents are evicted by local hosts to enable beneficial agent migrations and eventually improve the total network cost. In this paper, we provide algorithms tackling the aforementioned problem in a fully distributed manner. We also present and discuss the results of extensive simulations, showing that eviction-enabled algorithms can outperform their counterparts by up to 300%. © 2012 IEEE.

关键词： Mobile agents

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CP-driven modelling for multi-modal cyclic transport systems

CP-driven modelling for multi-modal cyclic transport systems

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14th IFAC Symposium on Information Control Problems in Manufacturing, INCOM'12

作者： Bocewicz, G. Wójcik, R. Banaszak, Z. Dept. of Computer Science and Management Koszalin University of Technology Sniadeckich 2 75-453 Koszalin Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wybrzeze Wyspiańskiego 27 50-370 Wroclaw Poland Dept. of Business Informatics Warsaw University of Technology Narbutta 85 02-524 Warsaw Poland

ISBN: (纸本)9783902661982

This paper concerns the domain of the multimodal transportation systems composed of buses, trains, trams and subways lines and focuses on the scheduling problems encountered in these systems. Transportation Network Infrastructure (TNI) can be modeled as a network of lines providing cyclic routes for particular kinds of stream-like moving transportation means. Lines are connected by common shared change stations. Depending on TNI timetabling the time of the trip of passengers following different itineraries may dramatically differ, e.g. the same distances along the north-south, and east-west directions may require different travel time. So, the mine question regards of TNI schedulability, e.g. the guarantee the same distances in arbitrarily assumed directions will require approximate traveled time. Considered timetabling problem belongs to NP-hard ones. The declarative model of TNI enabling to formulate cyclic scheduling problem in terms of the constraint satisfaction one is our main contribution. At last, the simulated results manifest the promising properties of the proposed model. © 2012 IFAC.

关键词： Travel time

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Watchman routes for lines and segments

Watchman routes for lines and segments

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13th Scandinavian Symposium and Workshops on Algorithm Theory, SWAT 2012

作者： Dumitrescu, Adrian Mitchell, Joseph S. B. Zyliński, Pawel Dept. of Computer Science Univ. of Wisconsin-Milwaukee United States Dept. of Appl. Math. and Statistics State Univ. of NY at Stony Brook United States Inst. of Informatics University of Gdańsk Poland

ISBN: (纸本)9783642311543

Given a set of non-parallel lines, a watchman route (tour) for is a closed curve contained in the union of the lines in such that every point on any line is visible (along a line) from at least one point of the route;similarly, we define a watchman route (tour) for a connected set of line segments. The watchman route problem for a given set of lines or line segments is to find a shortest watchman route for the input set, and these problems are natural special cases of the watchman route problem in multiply connected polygonal domains. In this paper, we show that the problem of computing a shortest watchman route for a set of n non-parallel lines in the plane is polynomially tractable, while it becomes NP-hard in 3D. Then, we reprove NP-hardness of this problem for line segments in the plane and provide a polynomial-time approximation algorithm with ratio O(log3 n). Additionally, we consider some special cases of the watchman route problem on line segments, for which we provide improved approximation or exact algorithms. © 2012 Springer-Verlag.

关键词： Approximation algorithms

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Progressive bacterial algorithm

Progressive bacterial algorithm

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13th IEEE International Symposium on Computational Intelligence and informatics, CINTI 2012

作者： Gal, Laszlo Lovassy, Rita Koczy, Laszlo T. Dept. of Technology Informatics and Economy University of West Hungary Szombathely Hungary Inst. of Microelectronics and Technology Kandó Kálmán Faculty of Electrical Engineering Óbuda University Budapest Budapest Hungary Dept. of Automation Faculty of Engineering Sciences Széchenyi István University Gyor Hungary Dept. of Telecommunications and Media Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781467352062

The purpose of this paper is to present a new version of the Bacterial Algorithms used for fuzzy rule base extraction called Progressive Bacterial Algorithm. In order to explore high quality models with very good speed of convergence towards the optimal rule base, we develop an improved version of the Bacterial Evolutionary and former Bacterial Memetic Algorithms. It is shown, in case of multidimensional reference problems, by comparing with existing methods, that an efficient and fast convergent tool is obtained. © 2012 IEEE.

关键词： Fuzzy inference

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Bagged nonlinear Hebbian learning algorithm for fuzzy cognitive maps working on classification tasks

Bagged nonlinear Hebbian learning algorithm for fuzzy cognit...

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7th Hellenic Conference on Artificial Intelligence, SETN 2012

作者： Papageorgiou, Elpiniki I. Oikonomou, Panagiotis Kannappan, Arthi Technological Educational Institute of Lamia Informatics and Computer Technology Department 3rd km Old National Road Lamia-Arthens 35100 Lamia Greece University of Thessaly Computer and Communication Engineering Dept. 38221 Volos Greece RVS College of Computer Applications Coimbatore-641402 Tamilnadu India

ISBN: (纸本)9783642304477

Learning of fuzzy cognitive maps (FCMs) is one of the most useful characteristics which have a high impact on modeling and inference capabilities of them. The learning approaches for FCMs are concentrated on learning the connection matrix, based either on expert intervention and/or on the available historical data. Most learning approaches for FCMs are Hebbian-based and evolutionary-based algorithms. A new learning algorithm for FCMs is proposed in this research work, inheriting the main aspects of the bagging approach which is an ensemble based learning approach. The FCM nonlinear Hebbian learning (NHL) algorithm enhanced by the bagging technique is investigated contributing to an approach where the model is trained using NHL algorithm as a base learner classifier. This work is inspired from the neural networks ensembles and it is used to learn the FCM ensembles produced by the NHL exploiting better classification accuracies. © 2012 Springer-Verlag .

关键词： Fuzzy Cognitive Maps

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Mining and estimating users' opinion strength in forum texts regarding governmental decisions

Mining and estimating users' opinion strength in forum texts...

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8th International Workshop on Artificial Intelligence Applications and Innovations, AIAI 2012: AIAB, AIeIA, CISE, COPA, IIVC, ISQL, MHDW, and WADTMB

作者： Stylios, George Tsolis, Dimitrios Christodoulakis, Dimitrios Technical Educational Institute of Ionian Islands Dept. of Applications of Information Technology in Administration and Economy 3100 Lefkas Greece University of Patras Computer Engineering and Informatics Dep. 26504 Patras Greece

ISBN: (纸本)9783642334115

Web 2.0 has facilitated interactive information sharing on the WWW, allowing users the opportunity to articulate their opinions on different topics. In this framework, certain practices implement information monitoring systems so as digests, reports on keywords and thematic queries regarding opinions on government decisions to be created. Analysis of rubrics associations, primary semantic and statistical interpretation of the texts is usually carried out. It is, on the other hand, rather difficult to get punctual predicts and estimate sufficiently forum users' opinion strength. In this work we present a methodology which automatically mines and estimates the strength of users' opinions on text forums regarding government decisions. According to our methodology, quantitative features are automatically mined from forum posts and then passed to a Support Vector Machine based classifier where the users' opinion strength is estimated. The proposed methodology has been validated in real data and initial experimental results are presented. © 2012 IFIP International Federation for Information Processing.

关键词： Sentiment analysis

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A cross-layer design for video transmission with TFRC in MANETs

A cross-layer design for video transmission with TFRC in MAN...

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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： Adam, George Bouras, Christos Gkamas, Apostolos Kapoulas, Vaggelis Kioumourtzis, Georgios Computer Technology Institute and Press Diophantus Patras Greece Computer Engineering and Informatics Dept. Univ. of Patras Patras Greece University Ecclesiastical Academy of Vella Ioannina Greece Center for Security Studies P. Kanellopoulou 4 10177 Athens Greece

ISBN: (纸本)9789898565235

Mobile Ad hoc NETworks (MANETs) are becoming more essential to wireless communications due to growing popularity of mobile devices. However, MANETs do not seem to effectively support multimedia applications and especially video transmission. In this work, we propose a cross-layer design that aims to improve the performance of video transmission using TCP Friendly Rate Control (TFRC). Our design provides priority to video packets and exploits information from the MAC layer in order to improve TFRC's performance. The proposed cross-layer mechanism utilizes Signal to Noise Ratio (SNR) measurements along the routing path, in order to make the route reconstruction procedure more efficient. Simulation results show that both the use of traffic categorization and the SNR utilization lead to important improvements of video transmission over the mobile Ad hoc network. More specifically, simulations indicate increased average Peak Signal to Noise Ratio (PSNR) for the received video, increased throughput and packet delivery ration, as well as reduced average end-to-end delay.

关键词： Signal to noise ratio

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Voice enabled Android application for vehicular complaint system: Using GPS and GSM-SMS technology

Voice enabled Android application for vehicular complaint sy...

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World Congress on Information and Communication Technologies (WICT)

作者： Aditi Mhapsekar Priyanka Kulkarni Uma Nagarsekar Dhananjay R. Kalbande Dept. of Computer Engineering Sardar Patel Inst. of Technology University of Mumbai Mumbai India

Commuters in India face a lot of vehicular problems which usually go unreported and thus, unattended. This is because making a location aware complaint is an inconvenient affair. This paper presents the architecture of a Voice Enabled Global Positioning System (GPS) based approach for reporting vehicular complaints on an Android platform. The complaint is registered via the Short Message Service (SMS) over the Global System for Mobile Communications (GSM). GPS tracking enhances the accuracy and competence of the complaint system by mapping the location where the complaint was issued. This will aid the authorities to identify the spot and have the problems resolved responsively. Since the proposed system is voice enabled and Android based on the complainant side, it will serve as a facilitative platform for Indian road commuters to send complaints to the relevant authorities, in addition to the existing channels, so that these issues could be addressed in a timely manner.

关键词： Decision support systems Communications technology

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Genetic optimization for Spectral Efficient multicasting in LTE systems

Genetic optimization for Spectral Efficient multicasting in ...

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Joint IFIP Wireless and Mobile Networking Conference (WMNC)

作者： Konstantinos Asimakis Christos Bouras Vasileios Kokkinos Andreas Papazois Computer Engineering & Informatics Dept. University of Patras Greece Computer Technology Institute & Press “Diophantus” Patras Greece

Past research has proposed the usage of assisting cells with Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN) to increase the the Spectral Efficiency (SE) of LTE. In this paper we propose and investigate a method for optimizing the power consumption of the network while retaining an acceptable SE for most users. We design an algorithm that makes use of genetic optimization and analytical estimation of the SE. The algorithm is implemented in a novel simulation tool that allows experimentation over various user distributions and LTE deployments similar to the real-world ones. This simulation tool estimates the SE of each user and is able to optimize the network deployment by adjusting the individual transmission power levels for each cell.

关键词： Sociology Statistics Optimization Power demand Genetic algorithms Network topology Interference

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Power management over co-channel femtocells in LTE-A systems

Power management over co-channel femtocells in LTE-A systems

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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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