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Saravana Kumar, S.
- Improvement of TCP Throughput in Wireless Networks with High Delay Round-Trip Time
Abstract Views :154 |
PDF Views:3
Authors
Affiliations
1 Department of IT, Sri Ramkrishna Institute of Technology, Coimbatore 10, Tamilnadu, IN
2 Department of MCA, Sri Ramkrishna Institute of Technology, Coimbatore - 10. Tamilnadu, IN
1 Department of IT, Sri Ramkrishna Institute of Technology, Coimbatore 10, Tamilnadu, IN
2 Department of MCA, Sri Ramkrishna Institute of Technology, Coimbatore - 10. Tamilnadu, IN
Source
Wireless Communication, Vol 2, No 3 (2010), Pagination: 61-65Abstract
Highly variable round-trip times (RTTs) in wireless networks can induce spurious timeouts, thus unnecessarily degrading throughput for the Transmission Control Protocol (TCP). In this paper, we propose and study two effective ways to improve TCP throughput in wireless networks. The first technique is to select a retransmission timeout (RTO) threshold higher than that in the de facto standard. Simulation reveals that the proposed method reduces timeouts and provides a relative throughput gain up to 13.7% based on RTT measurements in a commercial 3G network and in a simulated network environment. The second technique is an appropriate use of selective repeat (SR) and go-back-N (GBN) as retransmission policies upon packet timeout. We find that when RTTs have reasonable temporal correlation and packets can arrive out-of-order at the receiver, GBN can improve throughput over the SR policy. Specifically, based on the RTT measurements in the 3G network, our results show that GBN provides a 12% throughput gain over the SR policy.
Keywords
End-To-End Performance, Split TCP, TCP, Timeout, Throughput, Wireless Networks.
- Video Compression Using Prediction Coding
Abstract Views :153 |
PDF Views:2
Authors
Affiliations
1 J.P. College of Engineering, Ayikudi, IN
1 J.P. College of Engineering, Ayikudi, IN
Source
Digital Image Processing, Vol 4, No 8 (2012), Pagination: 433-439Abstract
To reduce the temporal, spatial and spectral redundancies in video frame sequence for the similarity between the current and the prior image, a new video coding algorithm based on integer wavelet transform with adaptive pixel-based prediction coding. A new scheme is presented which employs adaptive strategy based on Normalized cross correlation and partitioning for motion detection and object tracking in frame sequence. With the algorithm we have realized the real-time compression of video streams with high fidelity.Keywords
Integer Wavelet Transform (IWT), Lossless Video Coding, Pixel Prediction, Normalized Correlation and Partitioning.- A Novel Design of Error-Tolerant Adder for Low-Power High-Speed DSP Applications
Abstract Views :342 |
PDF Views:2
Authors
Affiliations
1 VLSI Design, Anna University of Technology, Coimbatore, IN
2 Department of ECE, Anna University of Technology, Coimbatore, IN
1 VLSI Design, Anna University of Technology, Coimbatore, IN
2 Department of ECE, Anna University of Technology, Coimbatore, IN
Source
Digital Signal Processing, Vol 3, No 5 (2011), Pagination: 255-259Abstract
In this paper a low power structure called Error Tolerant Adder is proposed. By adopting an emerging concept in VLSI design and test, error tolerance (ET), a novel error-tolerant adder (ETA) is proposed. The ETA is able to ease the strict restriction on accuracy, and at the same time achieve tremendous improvements in both the power consumption and speed performance and Area of chip. When compared to its conventional adder, the proposed ETA is able to attain more than 65% improvement in the Power-Delay Product (PDP). One important potential application of the proposed ETA is in digital signal processing systems that can tolerate certain amount of errors.Keywords
Adders, Digital Signal Processing (DSP), Error Tolerance, High-Speed Integrated Circuits, Low-Power Design, VLSI.- An Innovative Proposal for Secure Cloud Authentication using Encrypted Biometric Authentication Scheme
Abstract Views :172 |
PDF Views:0
Authors
Affiliations
1 Information Technology, St. Peter’s University, Chennai – 600054, Tamil Nadu, IN
2 Department of Computer Science Engineering, SVEC, Chennai – 602117, Tamil Nadu, IN
1 Information Technology, St. Peter’s University, Chennai – 600054, Tamil Nadu, IN
2 Department of Computer Science Engineering, SVEC, Chennai – 602117, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 35 (2015), Pagination:Abstract
Background/Objectives: Cloud computing has been emerging technology in recent years. But security is the main concern for the user not to accepting the cloud computing systems. Among them lack of trust and multi tenancy are the major issues, altogether comes under authentication problem Methods/Statistical Analysis: These problems are mainly in third party management model and self managed models as well. In order to overcome such tribulations Biometric is the major concern. Even in biometric research group is very much concentrating on security of biometric templates. For the security of biometric template, The two encryption algorithms such as AES, RSA have been imposed on templates. Findings: The biometric template will be safe in transit and storage as well in both cloud consumer and cloud provider side to improve the reliability of cloud. Applications/Improvements: If such approach has been adopted then confidence regarding the usage of cloud will be greater than before.Keywords
Authentication, Biometric, Cloud, Encryption, Privacy, SecurityFull Text
- Gallant Use of Cloud by a Novel Framework of Encrypted Biometric Authentication and Multi Level Data Protection
Abstract Views :180 |
PDF Views:0
Authors
Affiliations
1 Information Technology, St. Peter’s University, Tonakela Camp Road, Sankar Nagar, Avadi, Chennai - 600054, Tamil Nadu, IN
2 CSE/IT, Karpagam college of Engineering, Coimbatore – 641032, Tamil Nadu, IN
1 Information Technology, St. Peter’s University, Tonakela Camp Road, Sankar Nagar, Avadi, Chennai - 600054, Tamil Nadu, IN
2 CSE/IT, Karpagam college of Engineering, Coimbatore – 641032, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 44 (2016), Pagination:Abstract
Objectives: Nowadays cloud is becoming the major research area because of the security threats against cloud. According to the reports of CSA (cloud security alliance), much more security issues are related to authentication and improper data security etc. Methods/Statistical Analysis: Such problems can be neutralized by adopting biometric authentication mechanism in a novel way by providing protection in every direction since cloud is a medium where much more valuable computational data have been stored and transferred. Findings: In our approach, biometric authentication has been given a new dimension for the different level of security. And the public key and private key encryptions have been used in combination where data needs to be protected. By merging these biometric authentications along with multi-level encryption will give the enhanced security over the cloud and increase the confidentiality to use the cloud among cloud consumers as well as cloud providers. Applications/Improvements: Implementation of such methodology has given tremendous results over the security issues, authentication issues.Keywords
AES, Authentication, Biometric, Cloud Computing, Confidentiality, Data Security, 3DES, Elgamal, RSA.Full Text
- Enlarge Storing Concept in an Efficient Handoff Allocation during Travel by Time Based Algorithm
Abstract Views :142 |
PDF Views:0
Authors
Affiliations
1 St. Peter’s University, Avadi, Chennai - 600 054, Tamil Nadu, IN
2 Department of Computer Applications, St. Peter’s University, Avadi, Chennai - 600 054, Tamil Nadu, IN
3 Department of Computer Science Engineering, Karpagam College of Engineering, Coimbatore - 641032, Tamil Nadu, IN
1 St. Peter’s University, Avadi, Chennai - 600 054, Tamil Nadu, IN
2 Department of Computer Applications, St. Peter’s University, Avadi, Chennai - 600 054, Tamil Nadu, IN
3 Department of Computer Science Engineering, Karpagam College of Engineering, Coimbatore - 641032, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 40 (2016), Pagination:Abstract
Objectives: During travelling mobile hosts move from one cell to another cell, to deliver continuous service, the new cell would have sufficient channels to support the ongoing communication of the mobile hosts that moved into the cell. If channels are statically allocated, a cell may run out of channels when large number of mobile hosts moves to a cell, thus degrading the quality of service. Because allocation of cells statically without knowing the proper information hold most cells so it will decrease the quality of service of cellular network. Methods/Statistical Analysis: To overwhelm this problem, dynamic channel allocation methods have been proposed which allocate channels to cells on request, thus cumulative channel consumption and hence improving the quality of service. This scheme aimed at minimizing the effect of assigned channels on the availability of them in order to use in the interfering cells and reduce their overall reuse distance. Findings: The system shows better performance when the channels are distributed uniformly/non-uniformly with queues using the frequency reuse scheme. In order to support QoS in cellular networks it is a significant issue to allocate the communication channels efficiently because the bandwidth allocated for the cellular communication. The existing system used channel allocation system, based on traffic and priority, but it is not enough. Applications/Improvements: The proposed system is designed based on the time of entering of the cellular node in a new allocated cell and the time period for the particular cell stayed in the previous cell. So it is better for the travelling cellular networks. This research work focus only on a class of applications needing hard QoS guarantee. A more interesting work will address how to allocate.Keywords
Dynamic Channel, Mobile Hosts, Network, Prioritization Schemes, Resource Allocation, QOS.Full Text
- A Conceptual Mathematical Model of High Density Non-Metallic Reaction Wheels for Cube SAT Balancing Systems
Abstract Views :182 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, SRM University, Ramapuram, Chennai, Tamil Nadu, IN
1 Department of Mechanical Engineering, SRM University, Ramapuram, Chennai, Tamil Nadu, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 9 (2016), Pagination: 276-281Abstract
The reaction wheel setup is generally used in micro, mini, cube satellites to achieve balancing and to maintain its coordinates in a three-dimensional plane main, which is the space itself. These reaction wheels are generally designed in such a way that the density and the angular momentum of the total setup is more enough to balance the external forces, but since these wheels are made up of metals to possess high density they are equally attracted towards the earth’s magnetic field which makes a misalignment in its orbit. Hence the major aim of this research work is to design a mathematical model of a reaction wheel setup, that withstands the external forces acting on the cube sat and nullifies the effect of angular displacement of the cube sat by applying counter torque in the opposite direction and also to stay in its orbit irrespective of the earth’s magnetic field.
Keywords
High Density Reaction Wheels, Nonmetallic Reaction Wheels, Satellite Balancing Systems.Full Text
- Sensorless Operation of Brushless DC Motor Drive using Back EMF Technique
Abstract Views :91 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, S.A. Engineering College, Chennai, Tamilnadu, IN
1 Department of EEE, S.A. Engineering College, Chennai, Tamilnadu, IN
Source
International Journal of Engineering Research, Vol 3, No 4 (2014), Pagination: 255-257Abstract
The Brushless Direct Current (BLDC) motors are one of the motor types that is gaining rapid popularity. Its major appliances include refrigerators, washing machines, vacuum cleaners, freezers, etc. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. This paper proposes a new optimized technique for the Sensorless operation of permanent magnet brushless direct current (BLDC) motor, which is based on back Electro Motive Force (back EMF), Zero Crossing Detection (ZCD). This proposed commutation technique of BLDC motor significantly reduces sensing circuits and cost of motor drive.Keywords
Back Electromotive Force (EMF), Brushless DC (BLDC) Motor, Sensorless Control, Zero Crossing Detection.Full Text
- Dose Dependent Effect of Bacopa monnieri on Stress included Neural Degeneration in CA-1 and CA-3 Hippocampus Region of rat
Abstract Views :148 |
PDF Views:0
Authors
Affiliations
1 Saveetha Dental College, Saveetha University, Saveetha Institute of Medical and Technical Sciences, Chennai, IN
2 SEGi University, MY
1 Saveetha Dental College, Saveetha University, Saveetha Institute of Medical and Technical Sciences, Chennai, IN
2 SEGi University, MY
Source
Research Journal of Pharmacy and Technology, Vol 12, No 5 (2019), Pagination: 2353-2355Abstract
Aim: To evaluate the effect of Bacopa monnieri on CA-1 and CA-2 region of rats. Materials and Methods: Healthy adult male albino rats of Wistar strain weighing approximately 200-250 g were selected for the experiment. Group 1: This group consists of 6 rats housed in the laboratory for 4 weeks and was not exposed to any stress or drug except for daily handling and weighing. Group 2: This group consists of 6 rats, where each rat was given a cold stress for about 10 minutes in ice cold water with temperature around 15- 10° C. This procedure was done for the period of 4 weeks and no other drugs were induced. Group 3: This group consists of 6 rats, where they are given a cold stress for about 10 minutes in ice cold water of temperature 15- 10°C. This procedure was done for the period of 4weeks. Later each rat was given the drug Bacopa monnieri of 40mg/ kg with the required concentration for a period of 4 weeks. Group 4: This group consists of 6 rats, where they are given a cold stress for about 10 minutes in ice cold water of temperature 15- 10°C. This procedure was done for the period of 4 weeks. Later each rat was given the drug Bacopa monnieri of 80mg/ kg with the required concentration for a period of 4 weeks. Results: The present study reveals the protective and regenerative effect of Bacopa monnieri against cold-stress induced behavioural and biochemical anomalies in Wistar strain albino rats. The integrity of CA-3 hippocampal neurons, finding that Bacopa monnieri protected against age-related structural alterations. Histomorphometric study reveals an increase in the density of neuronal cells in CA-1 region. Conclusion: In our present study, the herb Bacopa monnieri is an effective drug in repairing the after effects of stress induced hippocampus of Wistar albino rats. As stress affects most of the neurons in CA region of hippocampus, the herb Bacopa monnieri can be used for improving memory in future after adequate amount of standard analysis.Keywords
Bacopa monnieri, Wistar Rats, Cornus ammonis, Hippocampus, Stress.References
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