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International Journal of Research in Computer and Communication Technology

[3 followers] Follow
This is an Open Access Journal

Open Access journal
ISSN (Print) 2320-5156
Published by Suryansh Publications

[1 journal]

Efficient Approach for Privacy Preserving Microdata Publishing using Slicing
- Authors: Vani B|D. Jayanthi
  Abstract: Many agencies and organizations are willing to release the data they collected to other parties for research and the formulation of public policies. Data often contains personally identifiable information and therefore releasing such data may result in privacy breaches. Several anonymization techniques, like generalization and Bucketization are designed for privacy preserving microdata publishing. Generalization loses considerable amount of information especially for high dimensional data. Bucketization does not prevent membership disclosure and does not apply for data that do not have a clear separation between quasi-identifying attributes and sensitive attributes. In this paper we show how slicing can be used for attribute disclosure protection. Slicing preserves better utility than generalization and is more effective than bucketization in workloads involving the sensitive attribute. It also demonstrates that how overlapping slicing is used to prevent membership disclosure.
  PubDate: 2013-05-01
  Issue No: Vol. 2 (2013)
Efficient Collaborative Scientific Workflow Composition using Service Oriented Collaboration Model
- Authors: Sushma K|Manjula T|Lavanya K
  Abstract: Collaboration has become a dominant feature of modern science. Many scientific problems are beyond the realm of individual discipline or scientist to solve and hence require collaborative efforts. Modern scientific data management and analysis usually rely on multiple scientists with diverse expertise. In recent years, such a collaborative effort is often structured and automated by a dataflow-oriented process called scientific workflow. Such workflows may have to be designed and revised among multiple scientists over a long time period. Existing tools are single user-oriented and do not support workflow development in a collaborative fashion. Based on scientific collaboration ontology, we propose a service-oriented collaboration model supported by a set of compos able collaboration primitives and patterns. The collaboration protocols are then applied to support effective concurrency control in the process of collaborative workflow composition. The Design and development of Confucius a service-oriented collaborative scientific workflow composition tool that extends an open-source, single-user environment
  PubDate: 2013-05-01
  Issue No: Vol. 2 (2013)
An effective Quality Speech Enhancement using Particle Filters
- Authors: G. Prem Kumar Raja Durai|A.Helen Jenifer Archana
  Abstract: Speech Enhancement aims to improve speech quality. The objective of enhancement is improvement in intelligibility and overall perceptual quality of degraded speech signal using audio signal processing techniques. The central methods for enhancing speech are the removal of background noise and echo suppression In this paper we use particle filters (PFs) for noise reduction on essentially linear speech production models, and the mounting evidence that the introduction of nonlinearities can lead to a refined speech model. This paper presents a study of PF solutions to the problem of speech enhancement in the context of nonlinear, neural-type speech models. It also decreases the computational cost by allowing us to use less particles. The simulation is done using MATLAB and the performance of PF for various speech signals are computed
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Blind Source Separation of Partial and full Transparency Image using Image separation Algorithm
- Authors: Narayana Murthy D|T Sukumar
  Abstract: The problem of blind separation of multiple source layers from their linear mixtures with unknown mixing coefficients and unknown layer motions. Such mixtures or Full Transparency or Superimposed image can occur when one takes photos through a transparent medium, such as window glass, and the camera or the medium moves between snapshots. Blind Source Separation (BSS) algorithm is to estimate both layer motions and linear mixing coefficients and then recover the all layers. In this method can handle general parameterized motions, including rotations, scaling, translations, and other transformations. Additionally the layers numbers are automatically identified and recovered, in the underdetermined cases where mixtures are fewer than layers. The Blind separation algorithm (BSS) is to handle mixtures with not only unknown mixing coefficients but also unknown parameterized layer motions are extended. This work addresses the separation of images that occurs when a document is scanned or photographed and the back page shows through front page (Ink Bleeding). This effect can be removing in partial paper transparency (show-through) and/or to bleeding of the ink through the paper (bleed-through).
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Will CDMA survive the blitz of GSM in the Indian telecom Ecosystem
- Authors: Mohammad Asif Naqshbandi
  Abstract: It is believed that in India, behind the early boom of CDMA (Code Division multiple access) was the revolutionary marketing strategy of reliance. Technology behind the CDMA makes it favorable for service provider and consumer. But despite being believed as technically improved than GSM, improper administration of the technology has almost lead to its dead end. This year India will be touching 900 million mobile subscribers, however CDMA subscriber base counts to 12 percent (approx.). Figures reveal that the subscriber base of CDMA is consistently decreasing from last few years in India. Decreasing average revenue per unit and subscriber base has lead the service providers of CDMA to start GSM services which is proving fatal for the technology. Furthermore shortage of spectrum has added to the condition
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Cloud Computing Used In Mobile Network
- Authors: Mahesh Vijay Shastri|Girish; V Patil|Manjiri U. Karande
  Abstract: As a new mode of network applications, cloud computing is transforming the Internet computing infrastructure. Also the mobile applications and devices are developing rapidly. Cloud computing is anticipated to bring an innovation in the mobile Internet. In this paper, popular cloud computing is introduced, the concept and core ideas of mobile cloud computing are described, as well as its system architecture; and the existing problems and development of mobile cloud computing are summarized, and some successful applications of mobile cloud computing are discussed.
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Selective jamming Attacks prevention Schemes in Wireless Networks using Combined Cryptographic Primitives
- Authors: Lavanya K|Vamsee Mohan|Sushma K
  Abstract: The open nature of the wireless average greeneries it susceptible to intended interfering attacks, typically referred to as blocking. This intended interfering with wireless transmissions can be used as a Launch pad for rising Denial-of-Service attacks on wireless networks. Typically, blocking has been addressed under an external threat model. However, adversaries with internal knowledge of protocol specifications and network secrets can launch low-effort blocking attacks that are difficult to detect and counter. In this work, we address the problem of selective blocking attacks in wireless networks. In these attacks, the adversary is active only for a short period of time, selectively directing messages of high importance. We illustrate the advantages of selective blocking in terms of network performance reduction and adversary effort by presenting two case studies; a selective attack on TCP and one on routing. We show that selective blocking attacks can be launched by performing real-time packet classification at the physical layer. To lessen these attacks, we develop three schemes that prevent real-time packet classification by combining cryptographic primitives with physical-layer attributes. We analyze the security of our methods and evaluate their computational and message overhead
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Comparison and statistical analysis of NAM and normal speech Processing using Wavelet Transform
- Authors: Janani P|Devi N
  Abstract: In this, we present statistical approaches to enhance body-conducted unvoiced speech for silent speech communication using wavelet transform. So far Analysis of NAM speech has been made only using HMM (Hidden Markov Model) and GMM (Gaussian Markov Model). In this paper, study of analyzing normal speech and NAM speech will be made by using Wavelet transform. Because, wavelets have the great advantage of being able to separate the fine details in a signal. It allows complex information to be decomposed into elementary forms at different positions and subsequently reconstruct it with high precision. Upon analyzing the Normal speech, NAM speech will also be analyzed using the same wavelet transform. The accuracy of words can be obtained from two methods that will be compared to determine the efficiency of using Wavelet transform in recognizing NAM speech. Wavelet analysis is capable of revealing aspects of data that other speech signal analysis technique such the extracted features are then passed to a classifier for the recognition of isolated words. Keywords: HMM, GMM, NAM, voice conversion, wavelet analysis
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Emotion Recognition From Human Eye Expression.
- Authors: Vinotha SRamaraj|Arun Ravindran|Arun Thirumurugan
  Abstract: Facial expressions play an essential role in communications in social interactions with other human beings which deliver rich information about their emotions. The most crucial feature of human interaction that grants naturalism to the process is our ability to infer the emotional states of others. Our goal is to categorize the various human emotions from their eye expressions. The proposed system presents a human emotion recognition system that analyzes the human eye region from video sequences. From the frames of the video stream the human eyes can be extracted using the well known canny edge operator and classified using a non – linear Support Vector machine (SVM) classifier. Finally, we use standard learning tool, Hidden Markov Model (HMM) for recognizing the emotions from the human eye expressions.
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Scalable Technique to Answer Continuous Aggregation Queries Using Network Of Aggregators Of Dyanmic Data Items
- Authors: Shivaraman S|Shobana .B.T
  Abstract: Continuous aggregation queries are used to monitor the changes in data with time varying for online decision making. For continuous queries, a low-cost and scalable technique using a network of aggregators. Individual node cannot by itself determine its inclusion in the query result for this a different algorithmic challenges from aggregate and selection queries are presented. At specific coherencies each data item can serve for a set of data aggregators. Technique involves disseminating query into sub query and sub queries are executed on the chosen data aggregators. we build a query cost model which can be used to estimate the number of refresh messages which is required to satisfy the client specified incoherency bound. Performance results shows that by our method the query can be executed using less than one third the messages required for existing schemes.
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Latency Equalization as a new network service primitive
- Authors: Kamatchi Saranya|S.Swarna Parvathi
  Abstract: Abstract-- Multiparty interactive applications such as teleconferencing, network gaming, and online trading etc., needs minimized delay difference among multiple clients for a good interactive experience. In multiparty interactive applications the delay difference among clients makes the application not to serve its purpose. To minimize the delay difference among multiple clients, a Latency Equalization Service is proposed. For implementation of the proposed latency equalization service, network support is essential. The latency equalization service uses a few routers in the network as hubs to redirect packets of interactive applications along paths with similar end-to-end delay. Also, a hub selection problem is formulated and a greedy algorithm is provided to solve it. This is also mainly concerned about the security of the data in the network. Now a day the security is main problem in the internet world. The data between clients and servers should be in confidential among the other clients. To provide security for the data, we use some special cryptography algorithms. The algorithm generates the random key which should be known only to the user and the particular server/client of the data.
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)
Qos Oriented Vertical Handoff for WIMAX/WLAN in Adhoc Wireless Network
- Authors: Ramya M|U Poornima
  Abstract: Vertical Handoff (VHO) scheme is designed based on the interworking architecture of WLAN/WIMAX which aims to provide always the best Quality of Service (Qos) for users. The performance of applications and network conditions are considered in the handoff process. The handoff procedures are normally initiated when the stations move across the border of WLANs. As a result, both the fixed station and the mobile stations within overlapped areas cannot benefit from VHOs. VHO could be initiated by two factors: mobility when a station moves out of the coverage of its connected WLAN and QoS when the connected network cannot satisfy the requirements. The whole handoff process is achieved by Vertical Handoff Manager (VHOM), which works on the Medium Access Control (MAC) layers of WiMAX and WLAN. VHOM uses the VHO decision algorithm to control smooth handoff between the WIMAX and WLAN. Moreover, evaluation algorithms to estimate the conditions of both WIMAX and WLAN networks in terms of available bandwidth and throughput. A simulation has demonstrated that schemes can keep stations always being connected.
  PubDate: 2013-04-30
  Issue No: Vol. 2 (2013)