Welcome to Journal of Theoretical and Applied Information Technology

Author:

Source:

Abstract

Mobile handheld device is a popular device that provides secure, private, authentic, and accurate communication and exchange of confidential information. In this paper we propose a technique to solve the authenticity problem in mobile communication. This technique is mainly based on the usage of the Fingerprint to identify both the speaker and the sender. This technique is simple, requires less calculation than other public/private key techniques, assures more authenticity than digital signature, and eliminates the need for a third party. Moreover, when applied to mobile phones, this technique resists any forge imposed by another party.

Author:

Source:

Abstract

This paper presents a novel method of developing an integrated logistics model for an industry / organization using the supply chain management system, thus providing a greater visibility of logistic model for an organization & eliminating the drawbacks of the current integrated logistics models. An algorithm is developed for this integrated logistics model in this research paper. This concept is being implemented by using a suitable example with an automobile, thus showing the effectiveness of the developed method.

Author:

Source:

Abstract

The term fusion means in general an approach to extraction of information acquired in several domains. The goal of image fusion (IF) is to integrate complementary multi sensor, multi temporal and/or multi view information into one new image containing information the quality of which cannot be achieved otherwise. The term “quality”, its meaning and measurement depend on the particular application. In this paper, Fast Discrete Curvelet Transform using Wrapper algorithm based image fusion technique, has been implemented, analyzed and compared with Wavelet based Fusion Technique. Fusion of images taken at different resolutions, intensity and by different techniques helps physicians to extract the features that may not be normally visible in a single image by different modalities. This work aims at fusion of two images containing varied information. Proposed algorithm takes care of registration as well as fusion in a single pass. Attempt has been taken to fuse MRI with CT and MR/MR images of
Preclinical data. In magnetic resonance imaging (MRI), there are three bands of images ("MRI triplet") available, which are T1-, T2- and PD-weighted images. The three images of a MRI triplet provide complementary structure information and therefore it is useful for diagnosis and subsequent analysis to combine three-band images into one. This fused image can significantly benefit medical diagnosis and also the further image processing such as, visualization (colorization), segmentation, classification and computer-aided diagnosis (CAD). This approach is is further optimized utilizing quantitative fusion metrics such as the Entropy, Difference Entropy, and Standard Deviation, image quality index (IQI) and ratio spatial frequency error (rSFe).

Author:

Source:

Abstract

In any radial distribution system, the optimal choice of the size of conductor in each branch of the system, which minimizes the sum of depreciation on capital investment and cost of energy losses, is important. This paper presents the methodology for the selection of optimal conductors, in radial distribution systems. The main objective is to minimize the real and reactive power losses in the system and also to maximize the total saving in cost of conducting material while maintaining the acceptable voltage levels. The optimal selections of conductor sizes are obtained by conventional method and genetic algorithm method. The conductor, which is determined by conventional method will satisfy not only the maximum current carrying capacity and maintain acceptable voltage limits. Apart from this it gives the maximum saving in capital cost of conductor and cost of energy loss in radial distribution system. The number of computations is more in conventional method that is why genetic algorithms are employed for the optimal selections of conductor sizes. The effectiveness of the proposed methods is tested on the feeders of Andhra Pradesh southern power Distribution Company limited.

Author:

Source:

Abstract

The next generation of networks is expected to support real-time multimedia applications with different classes of traffic and diverse bandwidth requirements. The Orthogonal Frequency Division Multiple Access (OFDMA) system with time division duplex mode, employing asymmetric slot allocation between uplink and downlink, is a good solution for mixed realistic traffic. In this paper, we investigate and discuss the effect of slot and subcarrier management strategy in an OFDMA system, in which each cell can adaptively control the resource allocation as per its prevailing traffic load. Considering traffic direction in home and neighbor cell, a total of four cases for interference pattern has been analyzed here. The simulation result shows that a 9dB of Signal to Noise Ratio (SNR) is enough in all four cases to bring the Bit Error Rate (BER) in acceptable limit. We also analyze the effect of change in distance ratio on BER.

Author:

Source:

Abstract

This paper presents a load flow calculation method using Runge-Kutta and IWAMOTO methods for ill conditioned power systems with facts devices like SVC, TCSC, STATCOM, and UPFC. This paper shows that there is formal analogy between Newton’s method and a set of autonomous ordinary differential equations. This analogy suggests that numerical integration method i.e., Runge-Kutta formulae can be used for solving the power flow problem. This paper uses the concept of optimal multiplier for solving the ill conditioned power systems with modification to the normal Newton-Raphson method in Iwamoto’s method. To examine the effectiveness of proposed methods 13 bus ill conditioned system along with the steady state modeling of the devices (SVC,TCSC,STATCOM,UPFC) with their functional capabilities are observed.

Author:

Source:

Abstract

Breast cancer is one of the major causes of death among women. Small clusters of micro calcifications appearing as collection of white spots on mammograms show an early warning of breast cancer. Primary prevention seems impossible since the causes of this disease is still remain unknown. An improvement of early diagnostic techniques is critical for women’s quality of life. Mammography is the main test used for screening and early diagnosis. Early detection performed on X-ray mammography is the key to improve breast cancer prognosis. In order to increase radiologists diagnostic performance, several computer-aided diagnosis (CAD) schemes have been developed to improve the detection of primary signatures of this disease: masses and micro calcifications. Masses are space-occupying lesions, described by their shapes, margins, and denseness properties. A benign neoplasm is smoothly marginated, whereas a malignancy is characterized by an indistinct border that becomes more speculated with time. Because of the slight differences in X-ray attenuation between masses and benign glandular tissue, they appear with low contrast and often very blurred. Micro calcifications are tiny deposits of calcium that appear as small bright spots in the mammogram. This paper presents a research on mammography images using Morphological operators and Fuzzy c – means clustering for cancer tumor mass segmentation. The first step of the cancer signs detection should be a segmentation procedure able to distinguish masses and micro calcifications from background tissue using Morphological operators and finally fuzzy c- means clustering (FCM) algorithm has been implemented for intensity – based segmentation. The proposed technique shows better results

Author:

Source:

Abstract

Space Vector Pulse Width Modulation (SVPWM) has become the successful techniques to construct three-phase sine wave Voltage Source Inverter (VSI) parallel to control three-phase motor using vector control. In this paper we present the analysis of SVPWM to construct two-phase sine wave VSI for single-phase induction motor. We also describes the modulation technique refer to dq components of main and auxiliary windings of single-phase induction motor. The VSI have four legs for this single-phase induction motor, and the four switching sequences had simulated in MATLAB and SIMULINK. The simulation result shows the feasibility of the proposed modulation techniques to drive single-phase induction motor.

Author:

Source:

Abstract

The calculation of Normalized Difference Vegetation Indices (NDVI) can be very useful in the generation of a land-use/land-cover classification. Calculation of a vegetative index (VI) from remotely sensed data can be used to quantify the amount of vegetation on the Earth's land surface. Numerous VI's exist, however the most commonly used VI is the NDVI. To detect the land- use and land- cover, the long term monitoring by the satellite images is useful as a big heritage. In this paper, the land-use assessment was investigated by using of the satellite images. After processing and exploitation of the data, the relation between bands was estimation and NDVI index were calculated. Then NDVI index with ground-related information was compared. Results showed that satellite images could detect the land-use changes in the local scale and vegetation index was suitable to estimate the land-use classification.

Author:

Source:

Abstract

The growing demand for capacity in wireless communications is the driving force behind improving established networks and the deployment of new worldwide mobile standard. Multiple Access Interference (MAI) and Inter Symbol Interference (ISI) limit the capacity of the system. The conventional approaches for wireless communication may not be good in many ways. Here, a proposal has been given to show that the problems in conventional approaches may be avoided, if the proposed Parallel Interference Cancellation (PIC) multi user detection with feedback (PICF MUD) is adopted in various multiple access schemes. In DS-CDMA system using PIC receiver with four stages, the Eb/No required to achieve a BER performance of 10-3 is 8 dB, whereas the single stage PIC receiver with feedback approach requires only 2 dB to achieve the same BER. The proposed PICF MUD is extended in various multiple access systems to provide better BER performance.

Author:

Source:

Abstract

With the incredible growth of high dimensional data such as microarray gene expression data, the researchers are forced to develop some new techniques rather than using existing techniques to meet their requirements. Microarray is a mechanism of measure the expression level of tens of thousands of genes simultaneously as a result, the data generated is very large. There must be an efficient technique to handle this huge amount of data thereby the researchers can able to do analyze and interpret them. The accuracy of the resultant value perhaps not up to the level of expectation when the dimensions of the dataset is high because we cannot say that the dataset chosen are free from noisy and flawless. So it is required to reduce the dimensionality of the given dataset in order to improve the efficiency and accuracy. Moreover the running time of an algorithm certainly has to be minimized to achieve the desired results. This is being done by apply the same data set to a same clustering technique with and without performed the dimensionality reduction technique principal component analysis on original data. The results of the two approaches are compared and it is proved that the results of clustering using PCA are more accurate, easy to understand and above all the time taken to process the data was substantially reduced.

Author:

Source:

Abstract

In the past decades, electricity markets have significantly restructured in developing countries. The electricity nodal pricing has emerged as an efficient tool under it. Recently, the incorporation of High Voltage Direct Current (HVDC) link in AC network brought significant techno-commercial changes in the electricity markets in developing countries. This paper aims at (1) the motivation and need to study electricity nodal pricing, (2) optimal nodal price formulation with incorporation of HVDC link in a AC transmission system, (3) testing of the methodology on IEEE 30-bus system and computation of nodal prices for real transmission network of India and (4) to assess the combined impact of transmission investment, incorporation of DC link, generation addition on electricity nodal prices. Paper concludes that the nodal prices are reduced with the incorporation of DC link and generation addition is one of the requirements to encourage competition in the wholesale electricity market.

Author:

Source:

Abstract

Image retrieval is analogous to conventional text-based querying of databases except that both the query and the retrieved data are in the form of images. For example, a query image of a mountain must retrieve images of mountains from a database of images. Such matches are done using features easily extracted from images such as colour, texture, shape and geometry. The major challenge facing the researchers is that humans measure similarities between images based on the objects found therein whereas a computer based system uses “low-level” features listed above. Humans, looking at an image of an elephant, would retrieve images of elephants from a database while a computer-based system would “look for” images containing gray regions of certain size and shape. The result is a serious mismatch between human expectation and the system performance and is called the “semantic gap” in literature

Author:

Source:

Abstract

The paper aims to discuss the Information Integrity issues in the wake of increasing business integration. It goes further to suggest an analytical solution and illustrate the same by applying it to Supply Chain Management
Design/ Methodology/Approach – In order to do the above the paper defines information integrity and suggests a model of Information Base Management System with an acquisition and utilization cycle attached. The model rests on an Information Topology Plane. The model also suggests a mechanism to originate the information in the acquisition and utilization cycle with a view to preserve information integrity.
Findings-Business integration is on the rise on account of increased usage of information technology systems. In wake of this situation the key issue is no more information manipulation, it is to ensure the accuracy, consistency and reliability i.e. information integrity. In order to achieve this Information Base Management System may be used, which encompasses an acquisition cycle, utilization cycle, Information Topology Plane and a method to originate information with a view to achieve information integrity.
Research Limitations- The research needs to be carried out further to crystallize the information integrity computation mechanisms. This paper goes up to identifying the method of generating Information Base Management System. The IBMS may further be used to compute an information integrity standard for each decision in a business process. This can be done using the error information base, which identifies the gap between the information base in the system and the environment as a basis for information integrity analysis.
Originality/Value- The paper adds authentic value as it suggests the need for information integrity in the wake of uncertainties arising in industrial management systems on account of increased automation and information technology usage. In order to do this it suggests a unique Information Base Management System and information origination mechanism for the same. An illustration of implementation of the model is shown using a lucid example of Supply Chain Management.

Author:

Source:

Abstract

In the current internet community, secure data transfer is limited due to its attack made on data communication. So more robust methods are chosen so that they ensure secured data transfer. One of the solutions which came to the rescue is the audio Steganography. But existing audio steganographic systems have poor interface, very low level implementation, difficult to understand and valid only for certain audio formats with restricted message size.
Enhanced Audio Steganography (EAS) is one proposed system which is based on audio Steganography and cryptography, ensures secure data transfer between the source and destination. EAS uses most powerful encryption algorithm in the first level of security, which is very complex to break. In the second level it uses a more powerful modified LSB (Least Significant Bit) Algorithm to encode the message into audio. It performs bit level manipulation to encode the message.
The basic idea behind this paper is to provide a good, efficient method for hiding the data from hackers and sent to the destination in a safer manner. Though it is well modulated software it has been limited to certain restrictions. The quality of sound depends on the size of the audio which the user selects and length of the message. Though it shows bit level deviations in the frequency chart, as a whole the change in the audio cannot be determined.

Author:

Source:

Abstract

This paper presents an assessment of stresses produced in an induction motor when the motor is allowed to run under open-circuit and short-circuit conditions. A generalized dynamic model of a three-phase squirrel cage induction motor has been developed using d and q variables in a synchronously rotating reference frame. This model can predict performance of the motor during open-circuit and short-circuit conditions. The simulation results are obtained from two squirrel cage induction motors, sized 3 hp and 2250 hp.