June 2015 Vol 4 No 1

Author (s) :


1). D G. Kamdar
2). T. M. Sadikot

Abstract :


Increase in the number of attacks recorded during electronic exchange of information between the source and intended destination as well as unauthorized usage of stored secret information has indeed called for a more robust method for securing data transfer and storage. Cryptography and steganography are the two popular methods available to provide security. One hides the existence of the message and the other distorts the message itself. In this paper, a data hiding system that is based on image steganography and cryptography is proposed to secure data transfer between the source and destination. Digital Image is used for the steganography and a LSB (Least Significant Bit) algorithm is employed to encode the message inside the image file. Two layers of encryption are applied to secrete data which provides multiple level of robust security recommended for the internet users for secure data transfer. Thus, in order to improve the security, the fusion of the two well known techniques called Crystography and their variation are proposed here.


No of Downloads : 1218

Author (s) :


1). Dr.B.RavindhranathReddy
2). Mr.K.Lenin

Abstract :


Reactive power optimization problem play a major role in operation and control of power system. In this research a new natural inspired algorithm called Enhanced Krill Herd algorithm is utilized to solve the reactive power problem. Krill Herd algorithm is based on herd behavior of Krill individuals. The minimum distance of each individual Krill from food and from utmost concentration of the herd are considered as the main assignment for the Krill movement. The location of every krill in time period is dependent on persuaded movement of other Krill’s, foraging movement and physical dissemination. in this paper krill herd algorithm is enhanced by integrating with chaos theory and the logistic chaotic mapping is used in physical dissemination. Thus the Enhanced Krill Herd algorithm (EKHA) is used to solve the reactive power problem and the validity of the algorithm has been tested in standard IEEE 57 and 118 bus test systems. Simulation study shows the better performance of the proposed algorithm.


No of Downloads : 756

Author (s) :


1). Khushali A. Shah
2). Mihir V. Shah
3). Naresh P. Patel

Abstract :


Scaling in CMOS technology becomes a great challenge to the analog designer, as design complexity increases with increase in shrinking. Digital-to-Analog Converters are one of the crucial modules of analog blocks facing high performance demand. In this paper, Digital-to-Analog Converter is designed with different current steering architectures like, binary weighted, thermometer-coded (unary), segmented. Also, these architectures are implemented and compared with different parameters. The speed of these 6-bit DACs was 300MSPS. The maximum current was set 0.3mA and maximum voltage was set 15mV. So, for 6-bit, LSB current was set as 4.88uA and LSB voltage was set as 0.244mV by connecting 3.3V supply voltage. The load was connected as 50 ohm. Ngspice26 simulations with the 0.18-µm complementary metal-oxide semiconductor technology were used.


No of Downloads : 1394

Author (s) :


1). Monika Sharma

Abstract :


In wireless sensor network, it is desirous to reliably transport the data from the sensors to the sink. The sensor nodes are small, with limited computing resources and processing speed and, they are cheap as compared to conventional sensors. Sensor nodes firstly sense the data, appraise it, and then assemble the information from the environment and according to some local decision process, transmit that sensed data to the user. So it requires reliable transport mechanism for such wireless sensor network. In this paper, we have enhanced the PSFQ protocol, which is a hop by hop downstream transport layer protocol. PSFQ is proposed for reliable retasking/reprogramming in wireless sensor network. PSFQ uses three major functions a PUMP, FETCH and REPORT. PSFQ slowly injects data packets into the network, and whenever packet loss occurs, it aggressively performs hop-by-hop loss recovery. PSFQ has report operation such as a feedback/scrutinizing mechanism. There are some shortcomings of PSFQ protocol such as line by sequence data delivery and pump slowly operation. In our proposed work we have improved PSFQ protocol in terms of average delivery ratio and average latency. We have tested original PSFQ protocol and improved protocol on TinyOS over TOSSIM Simulator and it is found that the proposed protocol is better than PSFQ in terms of average delivery ratio and average latency.


No of Downloads : 46

Author (s) :


1). Dr. Jignasa P. Mehta
2). Virat Dhabalia

Abstract :


Machine vision inspection has become a critical part of the automatic quality monitoring process. Conventional quality monitoring process is now very time consuming and tedious as well as inspection can not be performed with high accuracy and 100% testing is not possible. The best solution for quality inspection is Machine Vision Inspection System (MVIS), which is fully automatic inspection system having great accuracy with 100% testing. This paper approaches toward automatic Liquid Bottle level detection with implementation of Machine vision Inspection System (MVIS) based on MATLAB - Computer interface platform. Main objectives of doing inspection are: Automatic feature extraction with minimum processing time and online capabilities for implementation of MVIS. This MVIS is validated for any liquid transparent bottle level detection in any manufacturing firm of different discipline using MATLAB interface. This paper includes setting of Acceptance / Rejection policy to maintain the quality of liquid bottle level with implementation of Machine Vision Inspection System (MVIS) to quality monitoring inspection of liquid bottle through MATLAB algorithm.


No of Downloads : 64

Author (s) :


1). Dr. D. D. Vyas
2). Dr. D.R.Bhojani
3). Kalpesh J. Kothari

Abstract :


In the proposed super resolution reconstructed scheme the construction of high frequency subband images are done by using Lifting Wavelet Transform of the Luminance component of LR image. To enhance an intermediate stage by using SWT is introduced. In order to decompose luminance component of an input LR image into different subband images LWT is applied. Then the interpolations of high frequency subband images are done by using bicubic interpolation. The modifications in estimated high frequency subband images are being done by using high frequency subband obtained using SWT. Then to preserve the more information sparse representation is applied to Luminance component of LR image. Then sparesed image and modified high frequency subband images are combined to generate a Luminance component of high resolution image by using inverse SWT (ISWT). Then the Cb and Cr component of LR image is interpolated using bicubic interpolation. And at last the YCbCr to RGB conversion is done and High Resolution Colour Image can be generated. The quantitative and visual results are showing the superiority of the proposed technique over the conventional and state-of-art image resolution enhancement techniques.


No of Downloads : 714

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