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11th International Conference on Advances in Mob.le Computing and Multimedia, MoMM 2013

作者： Tewari, b.b.l P. Ghosh, Sasthi C. Department of Computer Science and Engineering Bengal College of Engineering and Technology Durgapur 713 212 West Bengal India Advanced Computing and Microelectronics Unit Indian Statistical Institute 203 B. T. Road Kolkata 700 108 India

ISBN: (纸本)9781450321068

Frequency channels are allocated to the access-points (APs) satisfying the co-channel interference in an IEEE 802.11 WLAN. Very few APs can b. activated simultaneously with a conflict-free frequency assignment to them, due to limited numb.r of frequencies. This may lead to a reduced aggregate throughput. We argue that aggregate throughput can significantly b. improved b. allowing some of the selected interfering APs to b. activated with the same frequency b.t to operate in a fairly time-scheduled manner to satisfy the co-channel interference. We introduce the notion of class and cluster and b.sed on it propose a comb.ned frequency assignment, AP scheduling and association algorithm with the ob.ective of maximizing the aggregate throughput. Simulation results show that the proposed algorithm is superior than b.th the algorithms that ignores the co-channel interference altogether b. assuming proper frequency planning and that allows to activate only those APs for which a conflict-free frequency assignment exists. © 2013 ACM.

关键词： Scheduling

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A Novel Approach for Text Steganography: Generating Text Summary Using Reflection Symmetry

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Procedia technology 2013年 10卷 112-120页

作者： Anandaprova Majumder Suvamoy Changder Department of Computer Science &Engineering Dr. B. C. Roy Engineering College Durgapur India Department of Computer Applications National Institute of Technology Durgapur India

Steganography is the art and science of covered or hidden writing. The purpose of steganography is covert communication to hide the existence of a message from the prying eyes. Digital Steganography algorithms have b.en developed b. using texts, images and audio as the cover media. However, using text as the target medium is relatively difficult as compared to the other target media, b.cause of the lack of availab.e redundant information in a text file. This paper presents an approach for text steganography through a technique that uses reflection symmetry of the English alphab.ts. To hide secret data b.ts, the proposed method checks the vertical and horizontal reflection symmetry properties of the characters present in each sentence of the text and, if followed, it selects the sentence to generate a summary of the text, known as cover text or stego- text. Similarly at the extraction end, the receiver checks for the reflection symmetry properties followed b. the characters present in the sentences of the stego- text and places the corresponding b.ts to get the secret message from the summary generated b. the hiding process. The proposed method exhib.ts a satisfactory experimental result with the cover text chosen from different daily newspapers.

关键词： Information Security Text Steganography Reflection Symmetry Property of English Alphab.ts Text Summary

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eLog — Teaching and data management system: Seemless data capture and analysis of education data

eLog — Teaching and data management system: Seemless data c...

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IEEE International Conference in MOOC Innovation and technology in Education (MITE)

作者： C. Imthyaz Sheriff Angelina Geetha Department of Computer Science and Engineering B. S. Abdur Rahman University Chennai India

Graduate and Higher Education sector is witnessing increase proliferation of education\campus management software for handling and management of all the data pertaining to the students, right from admissions to final graduation. Traditionally all these data was maintained using manual record\logs and the same was used as supporting documents for ISO and other quality audits\certifications. This transition from paper b.sed data entry to software enab.ed systems is still in infancy, making the job.a faculty memb.rs cumb.rsome as they have to do the job.twice, enter into manuals records and then replicate the same in education\campus management software. This paper proposes eLog, a technology enab.ed solution to address this gap b. seamless capturing of education data, reducing faculty workload and focusing on considerab.e analysis of data which leads to taking remedial actions to improve performance and attendance.

关键词： Software Tab.et computers Smart phones Educational institutions Economics Servers

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An inventory model for deteriorating items with time-dependent demand and time-varying holding cost under partial b.cklogging

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Journal of Industrial engineering International 2013年第1期9卷 1-5页

作者： Mishra, Vinod Kumar Singh, Lal Sahab.Kumar, Rakesh Department of Computer Science & Engineering B. T. Kumaon Institute of Technology Dwarahat Almora 263653 Uttarakhand India Department of Mathematics & Statistics Dr. Ram Manohar Lohia Avadh University Faizabad 224001 Uttar Pradesh India

In this paper, we considered a deterministic inventory model with time-dependent demand and time-varying holding cost where deterioration is time proportional. The model considered here allows for shortages, and the demand is partially b.cklogged. The model is solved analytically b. minimizing the total inventory cost. The result is illustrated with numerical example for the model. The model can b. applied to optimize the total inventory cost for the b.siness enterprises where b.th the holding cost and deterioration rate are time dependent. © 2013, Mishra et al.;licensee Springer.

关键词： Deteriorating items Inventory model Shortage Time-dependent demand Time-varying holding cost

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Enhancement of RC6 b.ock cipher algorithm and comparison with RC5 & RC6

Enhancement of RC6 block cipher algorithm and comparison wit...

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IEEE International Advance Computing Conference, IACC

作者： Harsh Kumar Verma Ravindra Kumar Singh Department of Computer Science & Engineering Dr B. R. Ambedkar National Institute of Technology Jalandhar India

ISBN: (纸本)9781467345279

This paper presents an enhanced version of RC6 b.ock Cipher Algorithm (RC6e - RC6 enhanced version), which is a symmetric encryption algorithm [1] designed for 256-b.t plain text b.ock. RC6 uses four (w-b.t) registers for storing plain text and for data-dependent rotations [2, 3], b.t this enhanced version (RC6e) uses eight (w-b.t) register that helps to increase the performance as well as improve security. Its salient feature includes two-variab.e algeb.aic expression modulo 2 w and 2 b.x-Type operations, b.x-Type I & b.x-Type II. Each b.x-Type operation uses two (w-b.t) registers. b.x-Type I works much like two registers (A & b.or C & D) operation in RC6 b.t in b.x-Type II b.twise exclusive-or is swapped b. integer addition modulo 2 w used in b.x-Type I and vice-versa, it improves Diffusion in each round. This enhanced version needs 2r+4 additive round-keys and uses every round-key twice for encrypting the file. This enhanced version performs b.tter with respect to RC5 [4, 5] and RC6 [2, 3] when file size is larger.

关键词： Encryption Registers Ciphers Standards Algorithm design and analysis

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Rapid convergence to optimality through repeated collective learning and flying of swarms

Rapid convergence to optimality through repeated collective ...

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IEEE International Advance Computing Conference, IACC

作者： Hiranmay Samaddar Department of Computer Science and Engineering Dr. B. C. Roy Engineering College Durgapur West Bengal India

ISBN: (纸本)9781467345279

We propose a new hierarchical collective learning (HCL) strategy for particle swarm optimization. The algorithm shows b.tter performance than popular PSOs on standard b.nchmark functions. The algorithm has three components: a) initialization b. create exemplars c) fly under guidance of exemplars created in previous step. The HCL strategy is applied for the first two parts. In collective learning (CL), an exemplar is created b. selecting the b.st comb.nation of values for every dimension from the group memb.rs for the fittest one. In hierarchical part, this process is repeated for some levels, where in every level, the exemplars from the last level act as the memb.r for the next higher level. During flying the initial population flies towards the final exemplar in proportion their fitness. These processes i.e. “create exemplars” and flying is repeated till a stop criterion is met. The process of flying reduces the common prob.ems “oscillation” and “two steps forward one step b.ckward” in PSO.

关键词： Convergence Sociology Statistics Algorithm design and analysis Particle swarm optimization b.nchmark testing Optimization

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Educationally effective teaching of design and analysis of algorithms

Educationally effective teaching of design and analysis of a...

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IEEE International Conference in MOOC Innovation and technology in Education (MITE)

作者： Jayalakshmi G Naragund Vidya S Handur Department of Computer Science and Engineering B V B College of Engg. & Tech Hubli India

Algorithms are the foundation of computer science and engineering, which instruct the computer to do the required task efficiently. Design and Analysis of Algorithms (DAA) course is aimed to develop prob.em solving skills, choose appropriate design strategy and analyze given algorithm for its performance in the student community. In this paper authors propose active learning methodologies like Manifold Prob.em Assignment, Inspection of Algorithms, technique b.sed Learning, Identification and Designing Method and Realization of Algorithm to meet ab.ve mentioned ob.ectives. Since the course is taught along with tutorial, different set of prob.ems are given across the b.tches to develop and analyze an algorithm b. choosing appropriate design technique. Tests are conducted on each design strategy, which helped the students to apply them to the design process. At the end of the semester students are given set of prob.ems, where they are expected to choose suitab.e design strategy like divide and conquer, decrease and conquer and transform and conquer to write and analyze the algorithm. Through this pedagogical activity, the Program Outcomes 3a and 3c of Ab.T 3a-3k are achieved. 70% of learners strongly agreed that their prob.em solving ab.lity is enhanced and 30% of learners agreed that there is an improvement in algorithm design ab.lity.

关键词： Algorithm design and analysis Heuristic algorithms Education Tutorials Data structures Software algorithms Prob.em-solving

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Analysis of HWMP-ETX Routing in Wireless Mesh Networks

Analysis of HWMP-ETX Routing in Wireless Mesh Networks

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International Conference on Advanced Computing, Networking and Security (ADCONS)

作者： Jayalakshmi G. Naragund R.M. b.nakar Department of Computer Science and Engineering B V B College of Engg. & Tech. Hubli India

Wireless Mesh Network is one of the b.dding technologies in wireless networks. Routing in WMN is complicated and unpredictab.e than wired network, due to unstab.e link states and interference b.tween neighb.r routers. Since WMN is supporting hyb.id architecture, a primitive metric like hop count is not efficient to route the information in the network. The Expected Transmission count (ETX) is radio b.sed metric and it reveals the link conditions in the form of delay, loss of packets and b.ndwidth etc. It uses cross layer approach to direct the data b. considering asymmetric nature of wireless links in WMN and captures the link state through the numb.r of retransmissions. Thus ETX forwards the data b.sed on link quality (or state) and provides effective communication b.tween routers. Hyb.id Wireless Mesh Protocol (HWMP) is b.sed on IEEE 802.11s and it is prominent protocol for hyb.id WMN. The authors aspire to provide effective communication in WMN using link state b.sed metric ETX. This paper discusses ab.ut the HWMP with ETX (HWMP-ETX) and analyses the performance of WMN using end-to-end delay and good put parameters. The results show that considerab.e improvement exists in all the ab.ve mentioned parameters b. using HWMP-ETX than HWMP with hop count.

关键词： Routing Prob.s Routing protocols Delays Cross layer design

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Faculty recruitment in engineering organization through fuzzy multi-criteria group decision making methods

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International Journal of u- and e- Service, science and technology 2013年第4期6卷 139-154页

作者： b.nerjee, Ruchika Ghosh, Dipendra Nath Department of Information Technology Dr. B. C Roy Engineering College Durgapur-713206 West Bengal India Department of Computer Science and Engineering Dr B. C Roy Engineering College Durgapur-713206 West Bengal India

Faculty selection procedure in any educational organization is a multi-criteria decision making (MCDM) prob.em. Faculty memb.rs play an important role while judging the quality of an educational institute. Thus, educational organizations are interested to recruit the b.st faculty in order to provide a quality education to their students. As, this MCDM prob.em requires multiple criteria and a finite set of candidate alternatives, an amalgamation of various MCDM methods can b. used to solve such prob.em. In this paper a study has b.en made on ranking five alternatives with the help of three step methodology comb.ning FAHP with PROMETHEE-2 and TOPSIS, comparing the results and finally determining the rank using group decision making method. This proposed model yields the ranking of the five candidates in a faculty interview considering several experts' opinion.

关键词： Metals

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Radiation damage in GaN-b.sed materials and devices

Radiation damage in GaN-based materials and devices

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8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8

作者： Patrick, Erin Law, Mark E. Pearton, S.J. Deist, Richard Ren, Fan Liu, Lu Polyakov, A.Y. Kim, Jihyun Department of Electrical and Computer Engineering University of Florida Gainesville FL 32606 United States Department of Materials Science and Engineering University of Florida Gainesville FL 32606 United States Department of Chemical Engineering University of Florida Gainesville FL 32606 United States Institute of Rare Metals B. Tolmachevsky 5 Moscow 119017 Russia Department of Chemical and Biological Engineering Korea University Anam-dong Sungbuk-gu Seoul Korea Republic of

ISBN: (纸本)9781632660008

A review of the effects of proton, neutron, γ-ray and electron irradiation on GaN materials and devices is presented. Neutron irradiation tends to create disordered regions in the GaN, while the damage from the other forms of radiation is more typically point defects. In all cases, the damaged region contains carrier traps that reduce the mob.lity and conductivity of the GaN and at high enough doses, a significant degradation of device performance. GaN is several orders of magnitude more resistant to radiation damage than GaAs of similar doping concentrations. In terms of heterostructures, preliminary data suggests that the radiation hardness decreases in the order AlN/GaN >AlGaN/GaN > InAlN/GaN, consistent with the average b.nd strengths in the Al-b.sed materials. The radiation damage can alter electric field profiles and drain current due to trapped negative charge and lead to increased b.eakdown voltages and apparent reliab.lity. Simulations of this effect show good agreement with experiments. We also discuss the literature on effects of different radiation types on the performance of GaN-b.sed high electron mob.lity transistors.

关键词： Gallium nitride

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