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作者： Rouf, Nirjhor Tahmidur Deep, Ashfaqul Haq Hassan, Rusafa Binte Khan, Sabbir Ahmed Hasan, Mahmudul Mominuzzaman, Sharif Mohammad Control and Applications Research Centre BRAC University Dhaka1212 Bangladesh Department of Electrical and Electronic Engineering BRAC University Dhaka1212 Bangladesh BRACU Robotics Research Lab School of Engineering and Computer Science BRAC University Dhaka1212 Bangladesh Department of Electrical and Electronic Engineering Bangladesh University of Engineering and Technology Dhaka1000 Bangladesh

As a result of this reported research, a simulation model to analyse the behaviour of carbon nanotube field effect transistors (CNTFETs) under non-ballistic conditions is explained and the effect of gate dielectric on the performance of CNTFETs has been explored in detail. For the first time, a thorough study of the combined non-ballistic effect on the performance of CNTFETs has been conducted and the output of the device has been analysed. It has been observed that a gate material with a high dielectric constant leads to higher on-state current and higher on and off state current ratio. In addition, the transconductance, total capacitance, charging energy, subthreshold swing (S), drain-induced barrier lowering (DIBL) and gain with respect to the dielectric constant have been observed and analysed. Transconductance and total capacitance increases by a significant amount, while charging energy and S decrease as the dielectric value increases. The DIBL and gain vary slightly as a higher value dielectric material is used as a gate. Furthermore, the results of this study have been plotted against previously reported ballistic outputs to provide a better perception of the deviation from ideal behaviour. At the same time, the outcomes of this analysis have been compared against some reported experimental values. © The Institution of engineering and Technology 2014.

关键词： Ballistics

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Morphological gradient based approach for text localization in video/scene images

Morphological gradient based approach for text localization ...

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International Conference on Advances in Computing, Communications and Informatics (ICACCI)

作者： B.H. Shekar L. Smitha M. Department of Computer Science Mangalore University Mangalore Karnataka India Department of Master of Computer Applications KVG College of Engineering Sullia Karnataka India

In this work, we present an approach for detecting the text present in videos/scene images based on morphological gradient information. The system detects the gradient information using morphological operations and the obtained results are binarized. The resultant binarized image contains some non-text regions which are then morphologically opened so that the small components with less than 4-pixel connectivity are eliminated producing another binary image. Finally, we employ connected component analysis and morphological dilation operation to determine the text regions and hence to localize text blocks. The experimental results obtained on publicly available standard datasets illustrate that the proposed method accurately detect and localize texts of various sizes, fonts and colors in videos and scene images.

关键词： Standards Videos Navigation Image edge detection Manuals

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An enhanced Least Significant Bit steganography method using midpoint circle approach

An enhanced Least Significant Bit steganography method using...

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International Conference on Communications and Signal Processing

作者： Vikas Verma Poonam Rishma Chawla Department of Computer Science and Engineering Ramgarhia Institute of Engineering and Technology Phagwara affiliated to Punjab Technical University Jalandhar India Department of Computer Science and Applications Kamla Nehru College for Women Phagwara India Department of Computer Science and Engineering Ramgarhia Institute of Engineering and Technology Phagwara India

To increase the security of messages sent over internet steganography is used. Various steganography techniques have been proposed so far. Least Significant Bit steganography is one such technique in which least significant bit of pixels of the image is replaced with data bits. This approach has the advantage that it is simplest one to understand, easy to implement and results in stego-images that contain embedded data as hidden. The disadvantage of Least Significant Bit is that it is vulnerable to steganalysis and is not secure at all. So as to make it more secure, the least significant bit algorithm is modified to work in different way. This proposed approach simply does not pick up least significant bits of pixel in a sequence but is combined with midpoint circle approach to choose which pixels are used to hide message. The goals of this paper are to present theoretic analysis of Least Significant Bit approach and to propose an advanced LSB embedding scheme that exhibits not only the advantages of LSB but also provides additional level of security. The scheme breaks the regular pattern of LSB, resulting in increased difficulty of steganalysis and thereby raising the security level.

关键词： Cryptography Image color analysis Image coding Image resolution Gray-scale

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A novel defense mechanism via Genetic Algorithm for counterfeiting and combating Jelly Fish attack in Mobile Ad-Hoc Networks

A novel defense mechanism via Genetic Algorithm for counterf...

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International Conference on Confluence The Next Generation Information Technology Summit (Confluence)

作者： Manjot Kaur Malti Rani Anand Nayyar Dept of Computer Science and Engineering PIT Kapurthala India Department of Computer Applications & IT KCL Institute of Management and Technology Jalandhar Punjab India

The Mobile Ad Hoc Network is a self controlling infrastructure-less wireless network with no unify administration with numerous characteristics like dynamic topology, multi hop routing, distributed routing and many more. MANETS are vulnerable to both active and passive attacks in the network. Jelly Fish attack downgrade the network performance and affects the network parameters like end to end delay, packet delivery ratio, throughput and energy spent. The end to end congestion control mechanism of Transmission Control Protocol is exploited by the Jelly Fish Attack. The main aim of this paper is to propose a novel mechanism for counterfeiting and combating the effect of Jelly Fish attack in the network using genetic algorithm.

关键词： Marine animals Genetic algorithms Mobile computing Delays Throughput Mobile ad hoc networks

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Discriminative DCT-MLP based approach for off-line signature verification

Discriminative DCT-MLP based approach for off-line signature...

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International Conference on Advances in Computing, Communications and Informatics (ICACCI)

作者： R.K. Bharathi B.H. Shekar Department of Master of Computer Applications Sri Jayachamarajendra college of Engineering Mysore Karnataka India Department of Computer Science Mangalore University Mangalore Karnataka India

ISBN: (纸本)9781479930814

In this paper, we propose to explore the possibility of integrating the appearance based paradigm with frequency domain for off-line signature verification. The proposed approach has four major phases : Preprocessing, Feature extraction, Feature reduction and Classification. In the feature extraction phase, Discrete Cosine Transform (DCT) is employed on the signature image to obtain the upper-left corner block of size m × n as a representative feature vector. These features are subjected to Linear Discriminant Analysis (LDA), thus reducing the feature vector to represent the signature with optimal set of features. The merits of DCT that captures the significant information in a small pack of coefficients is fed into discriminant analysis for further compact representation. The proposed approach, DiscriminativeDCT - MLP combines the benefits of two domains, yet does not suffer from their individual limitations. The optimal representative features from all the samples in the dataset form the knowledge base. Further, the Multi-layer perceptrons (MLP), a well known classifier is used for classification and the performance is measured through FAR/FRR metrics. Experiments have been conducted on standard signature datasets namely: CEDAR and GPDS-160, and MUKOS, a regional language (Kannada) dataset. The comparative study is also provided with the well known approaches to exhibit the performance of the proposed approach.

关键词： Discrete cosine transforms Feature extraction Training Forgery Knowledge based systems Vectors Frequency-domain analysis

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Performance analysis of clustering using partitioning and hierarchical clustering techniques

International Journal of Database Theory and Application

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International Journal of Database Theory and Application 2014年第6期7卷 233-240页

作者： Punitha, S.C. Thangaiah, P. Ranjith Jeba Punithavalli, M. Department of Computer Science and Engineering Karunya University Coimbatore India Department of Computer Applications Karunya University Coimbatore India Sri Ramakrishna College of Arts and Science Coimbatore India

Text clustering is the method of combining text or documents which are similar and dissimilar to one another. In several text tasks, this text mining is used such as extraction of information and concept/entity, summarization of documents, modeling of relation with entity, categorization/classification and clustering. This text mining categorizes only digital documents or text and it is a method of data mining. It is the method of combining text document into category and applied in various applications such as retrieval of information, web or corporate information systems. Clustering is also called unsupervised learning because like other document classification, no labeled documents are providing in clustering hence, clustering is also known as unsupervised learning. A new method called Hierarchical Agglomerative Clustering (HAC) which manages clusters as tree like structure that make possible for browsing. In this HAC method, the nodes in the tree can be viewed as parent-child relationship i.e. topic-subtopic relationship in a hierarchy. HAC method starts with each example in its own cluster and iteratively combines them to form larger and larger clusters. The main focus of this work is to present a performance analysis of various techniques available for document clustering.

关键词： Cluster analysis

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Punjabi DeConverter for generating Punjabi from Universal Networking Language

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Journal of Zhejiang University-science C(computers and Electronics) 2013年第3期14卷 179-196页

作者： Parteek KUMAR Rajendra Kumar SHARMA Department of Computer Science & Engineering Thapar University School of Mathematics & Computer Applications Thapar University

DeConverter is core software in a Universal Networking Language(UNL) system.A UNL system has EnConverter and DeConverter as its two major *** is used to convert a natural language sentence into an equivalent UNL expression,and DeConverter is used to generate a natural language sentence from an input UNL *** paper presents design and development of a Punjabi *** describes five phases of the proposed Punjabi DeConverter,i.e.,UNL parser,lexeme selection,morphology generation,function word insertion,and syntactic *** paper also illustrates all these phases of the Punjabi DeConverter with a special focus on syntactic linearization issues of the Punjabi *** linearization is the process of defining arrangements of words in generated *** algorithms and pseudocodes for implementation of syntactic linearization of a simple UNL graph,a UNL graph with scope nodes and a node having un-traversed parents or multiple parents in a UNL graph have been discussed in this *** cases of syntactic linearization with respect to Punjabi language for UNL relations like 'and','or','fmt','cnt',and 'seq' have also been presented in this *** paper also provides implementation results of the proposed Punjabi *** DeConverter has been tested on 1000 UNL expressions by considering a Spanish UNL language server and agricultural domain threads developed by Indian Institute of Technology(IIT),Bombay,India,as *** proposed system generates 89.0% grammatically correct sentences,92.0% faithful sentences to the original sentences,and has a fluency score of 3.61 and an adequacy score of 3.70 on a 4-point *** system is also able to achieve a bilingual evaluation understudy(BLEU) score of 0.72.

关键词： DeConverter EnConverter Machine translation Universal Networking Language(UNL) Syntactic linearization

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An extended approach to Non-Replicated dynamic fragment allocation in distributed database systems

An extended approach to Non-Replicated dynamic fragment allo...

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International Conference on Issues and Challenges in Intelligent Computing Techniques (ICICT)

作者： Raju Kumar Neena Gupta Department of Computer Applications Krishna Institute of Engineering & Technology Ghaziabad India Department of Computer Science Dehradun (Second Campus of Gurukul Kangri Vishwavidyalaya Haridwar) India

The trends and necessity of running business organizations from multi-locations and multi-nations caused huge demand for distributed databases. The performance of any distributed database is highly depends on th e fragmentation of global relations and allocation of those fragments at different sites of the network. The data or fragment allocation ma y be performed either by static or dynamic ways. By efficiently allocating fragments in a dynamic way, performance of the distributed business organizations can be enhanced. This paper proposed an extended approach to dynamic fragment allocation in Non-Replicated distributed database systems which additionally include distance factor besides already existing factors like access threshold, access time constraints, and volume of data transmission. This ext ended fragment allocation approach will enhance fragment allocation in broader sense and also improves the overall performance of the system.

关键词： Silicon Heuristic algorithms RNA Dynamic scheduling computers Random access memory Equations

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Engagement vs performance: Using electronic portfolios to predict first semester engineering student retention 14

Engagement vs performance: Using electronic portfolios to pr...

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4th International Conference on Learning Analytics and Knowledge, LAK 2014

作者： Aguiar, Everaldo Chawla, Nitesh V. Brockman, Jay Ambrose, G. Alex Goodrich, Victoria Department of Computer Science and Engineering University of Notre Dame Notre Dame IN 46556 United States Interdisciplinary Center for Network Science and Applications University of Notre Dame Notre Dame IN 46556 United States College of Engineering University of Notre Dame Notre Dame IN 46556 United States University of Notre Dame Notre Dame IN 46556 United States

ISBN: (纸本)1595930361

As providers of higher education begin to harness the power of big data analytics, one very fitting application for these new techniques is that of predicting student attrition. The ability to pinpoint students who might soon decide to drop out1 of a given academic program allows those in charge to not only understand the causes for this undesired outcome, but it also provides room for the development of early intervention systems. While making such inferences based on academic performance data alone is certainly possible, we claim that in many cases there is no substantial correlation between how well a student performs and his or her decision to withdraw. This is specially true when the overall set of students has a relatively similar academic performance. To address this issue, we derive measurements of engagement from students' electronic portfolios and show how these features can be effectively used to augment the quality of predictions. Copyright © 2014 by the Association for Computing Machinery, Inc.

关键词： Students

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New call and handoff call management scheme for reuse partitioning based cellular systems

New call and handoff call management scheme for reuse partit...

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Recent Advances and Innovations in engineering (ICRAIE)

作者： Abhijit Sharma Suvendu Konai Uma Bhattacharya Department of Computer Applications National Institute of Technology Durgapur West Bengal India Department of Computer Science and Technology Indian Institute of Engineering Science and Technology Shibpur Howrah West Bengal India

In cellular networks, blocking occurs when a Base Station has no free channel to allocate to a mobile user. There are two kinds of blocking. New call blocking refers to blocking of newly originated calls and the handoff dropping refers to blocking of ongoing calls due to the mobility of the users. From the user's point of view, the service of a handoff request is more important, as the forced termination of an ongoing call is more annoying than the blocking of new calls. In this paper, an adaptive guard channel based call admission control scheme is proposed which also deals with the problem of non-uniform traffic demand in different cells of the cellular network. A common set of channels are determined dynamically which can be used simultaneously in all the cells. Cell tiers with different radii are used to cope with the interference introduced by using same set of channels simultaneously in all cells. The adaptive guard channels alleviate the considerable amount of increase in the new call blocking probability due to guard channels while it can still protect handoff calls. The performance of the proposed scheme is presented in terms of call blocking probability, call dropping probability and channel utilization. Simulation results show that the proposed scheme can reduce the call blocking as well as call dropping significantly in highly congested cell.

关键词： Handover Resource management

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