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MobiCom'09 - Proceedings of the Annual international conference on Mobile computing and networking

MobiCom'09 - Proceedings of the Annual International Confere...

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15th Annual ACM international conference on Mobile computing and networking, MobiCom 2009

ISBN: (纸本)9781605587028

The proceedings contain 30 papers. The topics discussed include: dynamic spectrum access in DTV Whitespaces: design rules, architecture and algorithms;mining spectrum usage data: a large-scale spectrum measurement study;a quorum-based framework for establishing control channels in dynamic spectrum access networks;throughput-efficient sequential channel sensing and probing in cognitive radio networks under sensing errors;SAM: enabling practical spatial multiple access in wireless LAN;order matters: transmission reordering in wireless networks;design, implementation and evaluation of an efficient opportunistic retransmission protocol;Esense: communication through energy sensing;capacity of large-scale CSMA wireless networks;scheduling partition for order optimal capacity in large-scale wireless networks;mobility increases the connectivity of k-hop clustered wireless networks;opportunistic flooding in low-duty-cycle wireless sensor networks with unreliable links;and compressive data gathering for large-scale wireless sensor networks.

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Failure performance study of hierarchical agent based patient health monitoring in wireless body sensor mesh network

Failure performance study of hierarchical agent based patien...

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international conference on advances in computing, control and Telecommunication Technologies, ACT 2009

作者： Benjamin, Norman A. Sankaranarayanan, Suresh Mona Institute of Applied Science Jamaica Intelligent Networking Group Department of Computing University of West Indies Kingston Jamaica

ISBN: (纸本)9780769539157

Wireless (body) sensors are being deployed on patients to continually monitor their physiological health conditions. These body sensors are very tiny devices and when attached to the human patient body would eliminate the need for continuously monitoring by a nurse/doctor. These can be configured to convey the patient's status directly to the assigned doctor/nurse through the personal smart phone, PDA or Palm device. In this situation, Wireless Mesh Networks (WMN) can also be used to transmit vital information arising form the wireless Body sensor Network (WBSN) to the backbone network. The integration of WBSN and WMN technologies, results in Wireless Sensor Mesh Network (WSMN). In this paper we present the results on the performance of such a WSMN used for patient health monitoring application, in terms of parameters like delay, MAC delay and throughput under varying number of patients and varying number of doctors in wards and also the failure performance when the mesh nodes fail, based on simulation study carried out with Opnet modeller 15.0.

关键词： Mesh generation

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An Efficient Approach For Non-Invertible Cryptographic Key Generation From Cancelable Fingerprint Biometrics

An Efficient Approach For Non-Invertible Cryptographic Key G...

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international conference on advances in Recent Technologies in communication and computing

作者： Lalithamani, N. Soman, K. P. AMRITA Vishwa Vidyapeetham Dept Comp Sci & Engn AMRITA Sch Engn Coimbatore Tamil Nadu India AMRITA Vishwa Vidyapeetham Ctr Excellence Computat Engn & Networking Coimbatore Tamil Nadu India

ISBN: (纸本)9781424451043

The principal drawback of the existing cryptographic algorithms is the maintenance of their key's secrecy. Added with, human users have a difficult time remembering strong but lengthy cryptographic keys. As a result, utilizing individual's biometric features in the generation of strong and repeatable cryptographic keys has gained enormous popularity among researchers. The unpredictability of the user's biometric features, incorporated into the generated cryptographic key, makes the key unguessable to an attacker lacking noteworthy knowledge of the user's biometrics. Nevertheless, if a person's biometric is lost once, it will be compromised forever as it is inherently associated with the user. To overcome the above, cancelable biometrics has been proposed as an effective solution for canceling and re-issuing biometric templates. Here, we propose an innovative and efficient approach to generate a non-invertible cryptographic key from cancelable fingerprint templates. Initially, a one-way transformation is applied on the minutiae points extracted from the fingerprints, to attain a set of transformed points. Subsequently, the transformed points are made use of to form cancelable templates. The cancelable fingerprint templates are then utilized to generate a unique non-invertible key. As the cryptographic key generated is non-invertible, it is highly infeasible to acquire the cancelable fingerprint templates or the original fingerprint from the generated key. The effectiveness of the proposed approach is demonstrated by making use of fingerprints accessible from public sources.

关键词： Biometrics Cancelable Biometrics Cryptography Biometric cryptosystems Key generation Non-invertible Key Fingerprint Minutiae Points

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Ticketing solutions for Indian railways using RFID technology

Ticketing solutions for Indian railways using RFID technolog...

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international conference on advances in computing, control and Telecommunication Technologies, ACT 2009

作者： Prasanth, Venugopal Hari Prasad, R. Soman, K.P. IV B.tech EEE Amrita Vishwa Vidyapeetham Coimbatore TamilNadu-641105 India CEN Centre for Excellence in Computational Engineering and Networking Amrita Vishwa Vidyapeetham Coimbatore TamilNadu-641105 India

ISBN: (纸本)9780769539157

Modernization of Indian railways has always been a question in focus for the development of the basic infrastructure of our country. Since the railways represent one of the best modes of transport available to the common people, it would be impossible to just keep increasing the fares to meet costs incurred due to maintenance, the large workforce and the expansion activities. The railways should consider upgrading itself to cutting-edge technologies for better efficiency and cost reduction. One such up gradation is the role of information technology and e-ticketing which is achieved with the help of RFID technology. This RFID technology has been extensively used in the identification process these days with the help of a card and a reader. The idea has evolved from a systematic study of the computerization of railways and the loopholes in the present day system. A simple theoretical model is proposed which when implemented could result in an easier and better management of the tedious ticketing process. © 2009 IEEE.

关键词： Cost reduction

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Daubechies-Lagarias algorithm - A simplified approach

Daubechies-Lagarias algorithm - A simplified approach

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international conference on advances in computing, control and Telecommunication Technologies, ACT 2009

作者： Soman, K.P. Arathi, T. Augustine, Mridula Sara Arunima, S.V. Department of Computational Engineering and Networking Amrita Vishwa Vidyapeetham Coimbatore India

ISBN: (纸本)9780769539157

Daubechies & Lagarias algorithm gave the first proof regarding the convergence of the iterations producing the scaling and wavelet functions. The proof however uses advance concepts from linear algebra. Incidentally, it also uses a concept called joint spectral radius, which was introduced by Strang in 1960. The concept of joint spectral radius remained dormant for a very long time. It was only Daubechies and Lagarias, who understood the importance of the concept and applied it for solving the key equation in wavelet theory, the refinement equation for the scaling function. The concept was developed in two papers consisting of around 70 pages. The mathematics employed is formidable to a mathematically less sophisticated reader. In this paper, we give a simplified and intuitive explanation for the same, with all the required mathematics in one place, so that the material can be used for classroom teaching. Then it is shown how the algorithm is implemented in Microsoft Excel. Also is presented as to how to generalize the same for the M-band case. © 2009 IEEE.

关键词： Matrix algebra

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Isolated Word Recognition using Low Dimensional Features and Kernel based Classification

Isolated Word Recognition using Low Dimensional Features and...

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international conference on advances in Recent Technologies in communication and computing

作者： Nehe, N. S. Holambe, R. S. Pravara Rural Engn Coll Dept Instrumentat & Control Engg Loni Maharashtra India SGGS Inst Engn & Technol Dept Instrumentat Engg Nanded Maharashtra India

ISBN: (纸本)9781424451043

This paper describes polynomial kernel subspace approach to Isolated Word Recognition (IWR) systems. Linear Predictive Coding (LPC) coefficients derived from wavelet sub-bands of speech frame were used as features. This approach represents mapping of speech features (input space) into a feature space via a non-linear mapping onto the principal components called Kernel Linear Discriminant Analysis (KLDA). The non-linear mapping between the input space and the feature space is implicitly performed using the kernel-trick. This nonlinear mapping using KLDA increases the discrimination ability of a pattern classifier. The use of Wavelet sub-band based LPC features (WLPC) provide low dimensional features which reduce the memory requirement and KLDA provides the fast classification and recognition. Experimental results obtained on isolated word database show that the proposed technique is computationally efficient and performs well with less training data.

关键词： Linear Predictive Coding Wavelet Transform Kernel Linear Discriminant Analysis

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"I Heard It on the Grapevine" - Blogging, Facebook, YouTube, and Student Self-organization during a Faculty Strike

"I Heard It on the Grapevine" - Blogging, Facebook, YouTube,...

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3rd international conference on Online Communities and Social computing held at the 13th international conference on Human-Computer Interaction

作者： Gould, Emilie W. SUNY Empire State Coll Ctr Distance Learning Saratoga Springs NY 12866 USA

ISBN: (纸本)9783642027734

Before the web, a strike tended to be between two parties and the communication rules for such crises were clear: the employer funneled all messages through a single spokesperson to maintain control of its image while the union focused most of its efforts on maintaining the morale and commitment of its membership. The web enlarges the audiences for a strike and allows stakeholders to build coalitions against both sides. During a faculty strike at Acadia University in 2007, student stakeholders developed their own online channels of communication to respond to faculty and administration actions. While the professors walked the picket line and the administrators remained cloistered in University Hall, a lively discourse was taking place on the web in student blogs, facebook groups, and You-Tube. This reaction to this strike shows how new media can empower outsiders to make sense of events and organize themselves to put pressure on official social structures. In addition, it demonstrates the power of Millennial students to force others to take their views into account.

关键词： social networking blogging Facebook You-Tube rhetoric strike communication crisis communication Internet Crisis Potential Millennial generation

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Key technique study of channel evalution in adaptive frequency hopping systems

Key technique study of channel evalution in adaptive frequen...

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5th international conference on Wireless communications, networking and Mobile computing, WiCOM 2009

作者： Desheng, Zhang Jianping, An Yonghui, Shi Department of Electronic Engineering Beijing Institute of Technology Beijing China

ISBN: (纸本)9781424436934

An adaptive frequency hopping (AFH) scheme can increase the interference rejection capability of the frequency hopping system, which adopt digital signal processing technology, so it is proposed in military communication gradually. An AFH scheme is based on real time channel evaluations, which makes use of them to analyze and to evaluate the frequency status. A straightforward AFH scheme for duplex links is proposed and analyzed. In such a link, link quality measurements are fed back to the transmitter such that known interference (i.e., 'bad' frequencies) may be avoided according to the frequency selecting algorithm. The tradeoff between the amount of feedback information and link throughput as well as the impact of feedback reliability is important. The antijam property of the AFH scheme is very promising. ©2009 IEEE.

关键词： Quality control

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A Loss Differentiation Algorithm Based on ECN and its Emulation in Linux

A Loss Differentiation Algorithm Based on ECN and its Emulat...

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5th international conference on Wireless communications, networking and Mobile computing

作者： Ye, Jin Wang, Jiaxin Yuan, Yinghang Huang, Jiawei Guilin Univ Elect Technol Coll Informat Sci & Engn Guilin Peoples R China Cent S Univ Coll Informat Sci & Engn Changsha Peoples R China Hunan Radio TV Univ Coll Informat & Engn Changsha Peoples R China

ISBN: (纸本)9781424436927

Traditional TCP variants use packet loss as the indicator of congestion and reduce the congestion windows size, which results in degradation of TCP throughput. Subsequently, ECN is widely used to send the congestion feedback to end hosts by couple with A OM on routers. Based on the TCP fluid model under ECN mechanism, an enhancement over wired/wireless hybrid networks, WECN is analyzed. The contribution of this paper is to implement WECN in Linux and combine it with TCP Reno, TCP Westwood in testbed. The results show that WECN can be extended to current TCP variants and can improve TCP throughput in lossy links.

关键词： Congestion control Explicit Congestion Notification Active Queue Management Linux Testbed

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A Water-saving Irrigation System Based on Fuzzy control Technology and Wireless Sensor Network

A Water-saving Irrigation System Based on Fuzzy Control Tech...

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5th international conference on Wireless communications, networking and Mobile computing

作者： Peng Xiaohong Mo Zhi Xiao Laisheng Liu Guodong Guangdong Ocean Univ Coll Informat Technol Zhanjiang Peoples R China Zhanjiang New Zhongmei Chem Ind Co Ltd Dept Technol Zhanjiang Peoples R China China Construct Bank Maoming Branch Maoming Peoples R China

ISBN: (纸本)9781424436927

A scheme is promoted which builds a water-saving irrigation system based on wireless sensor network and fuzzy control technology, we design a wireless sensor network, which consists of sensor node cluster, coordinator node and irrigation controller nodes Here sensor node cluster is responsible for gathering information such as soil moisture and regularly send it to the coordinator node. Fuzzy controller embedded in the coordinator node takes soil moisture error and error change rate as its input and obtained water demand amount of crops under certain soil moisture through fuzzy inference and fuzzy judge and output it to irrigation controller node. Irrigation controller node controls the implementation of automatic watering. In this article, we describe the implementation scheme of sensor network node and fuzzy controller in detail and design communication protocol for sensor nodes. The experimental results show that the system can quickly and accurately calculate water demand amount of crops, which can provide a scientific basis for water-saving irrigation. In this way, we have made an exploratory study in applying wireless sensor networks and fuzzy control technology to fine agriculture project.

关键词： irrigation fuzzy control technology wireless sensor network

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