Welcome to Journal of Theoretical and Applied Information Technology

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The existence of numerous imaging modalities makes it possible to present different data present in different modalities together thus forming multimodal images. Component images forming multimodal images should be
aligned, or registered so that all the data, coming from the different modalities, are displayed in proper locations.
The term image registration is most commonly used to denote the process of alignment of images , that is of transforming them to the common coordinate system. This is done by optimizing a similarity measure between the two images. A widely used measure is Mutual Information (MI). This method requires estimating joint histogram of the two images. Experiments are presented that demonstrate the approach. The technique is intensity-based rather than feature-based. As a comparative assessment the performance based on normalized mutual information and cross correlation as metrics have also been presented.

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This paper deals with the presentation of a new formulation to solve combined magnetic and electric problems including the motional electromotive force in a rotating electric machine. In this analysis, the boundary element method and finite element method are applied to the brushless synchronous generator. This method takes the effect of the relative motion between the field winding and the armature winding into account, this technique is used in order to analyze the motion induced current in the armature windings. We use this method to predict the dynamic behavior of electric machines that is gaining in popularity because of the availability of high performance microcomputers and the development of new features, such as the integration of the rotor’s motion and the machine’s supply circuitry in the finite element solution.

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Plasma proteins are the most important proteins of human body and include enzymes, regulatory proteins, clotting factors and hormones. They perform diverse functions in the human body and play a cardinal role in its normal functioning. An aberration in structure, function or concentration of even one plasma protein may have fatal consequences. As a result, the study of plasma proteins becomes imperative to gain an insight into the reasons underlying various disorders which may be attributed to an anomaly in structure, function or variation in number of different types of plasma proteins. With the view to acquire information about the various proteins present in the blood plasma and to analyse the functions of all these proteins, a comprehensive analysis of plasma proteins was carried out.

Each protein was analysed individually on various parameters namely - the number of isoforms of that protein, the number of Single Nucleotide Polymorphisms (SNPs) present, the ectopic localization, post translational modifications(PTMs), proteolytic cleavage and expressions. Thus, a detailed and extensive analysis of each protein was carried out and this was followed by comparative analysis of all the plasma proteins. The proteins for which the locus was found to be on X-chromosome were studied for further analysis and studied for the presence of isoforms. SNPs were found in 47% of the X-chromosomal plasma proteins. PTM analysis revealed that only 6% of these proteins showed post translational modifications. No proteolytic cleavages were found. The ectopic localization of 62% of the plasma proteins is still not known, while a considerable percentage of proteins were found to be localized in the nucleus and cytoplasm. Only a small proportion of the proteins were found to be located on the plasma membrane and much lesser on the extracellular surface. The presence of a high percentage of X-chromosomal plasma proteins in nucleus and cytoplasm illustrates explicitly a deviation in the localization of plasma proteins. The data obtained indicates a leakage or malfunctioning of these proteins. Hence, we believe that the region of the X chromosome coding for these plasma proteins fall among the other important disease susceptible regions of the X chromosome.

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A new controller based on artificial neural network (ANN) for induction machines is introduced and implemented. The introduced controller is designed for efficiency maximization. The neural network (ANN) is used for commanding optimum voltage and frequency that maximizes the drive efficiency. To provide the required data to train and test the artificial neural network a simulation program was written to calculate commanded voltage and frequency that would drive the induction machine with maximum efficiency at different load and speed. The controller is able to control the induction machine over a wide speed range from standstill to high speeds in the flux-weakening region. The trained neural networks are employed for the control of an induction machine under different loads. It has been found that the neural network control system is reliable without using a speed sensor. The proposed controller is an appropriate technique for speed sensor-less control of an induction machine to drive an electric vehicle (EV). The performance of this control system has been found to be as good as those controllers, which have been used in the induction machine model. The descriptions of the control system, training procedure of the neural network is also given. Simulation results are shown to validate the scheme.

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As the demand for refrigeration and Air conditioning has been increased during the last decade, the cool storage systems can be used to the economic advantage over conventional cooling plants. Cool storage system using phase change materials can be used for peak load shifting if they are installed in the building. In the case of sensible heat storage system, energy is stored or extracted by heating or cooling a liquid or a solid, which does not change its phase during the process. A variety of substances like water, heat transfer oils and certain inorganic molten salts, and solids like rocks, pebbles, and refractory are used. The choice of the substances used largely depends upon the temperature level of the application. Phase change material (PCM) are one of the latent heat materials having low temperature range and high energy density of melting – solidification compared to the sensible heat storage. The tests on transient heat transmissions across different roof structures were conducted. It was found that when installing PCM in the withering course (WC-mixture of broken bricks and lime mortar) region nearly uniform roof bottom surface temperature was maintained.

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This paper presents a Java-based real-time Internet access estimation tool for Quality of Service (QoS) in Internet accesses for Multimedia applications (JEQoSIM). It is specially aimed for real-time multimedia applications which use the User Datagram Protocol (UDP). The system is capable of estimating access capacity, available bandwidth and delay as the critical end-to-end QoS parameters for this kind of applications. The algorithm used for QoS estimations is one-way, and is based on the packet train technique. Real-time QoS estimation elements are distributed among a central server and the Internet end user. The central server contains a UDP packet bursts server and a web server that hosts the Java applet that implements the UDP packet bursts client. JEQoSIM has been validated using several commercial Internet accesses with different technologies: Asymmetric Digital Subscriber Loop (ADSL), General Packet Radio Service (GPRS) and Universal Mobile Telecommunications System (UMTS).

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Web Services has emerged as a dominant paradigm for constructing and composing distributed business collaborations over the web. The focus of this paper is propose the main challenges for securing Web Services and summarizes emerging standards of web services security mechanisms. Security is one of the major concerns when developing mission critical business applications and this concern motivated the Web Services Security specifications. This paper puts forward a kind of Current Security Mechanisms for Web Services and Security in a Web Services World Proposed Architecture and Roadmap, which includes secure communication protocol, authentication, Signature, Encryption, Authorization, and Transport Security etc. It provides Strong ways to protect information for Browser/Server applications.

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A lot of current research in DNA computing has been directed towards solving hard combinatorial problems. Among them Knapsack problem is one of the most common problems which have been studied intensively in the last decade attracting both theorists and practicians. Fractional Knapsack Problem is easily solvable by greedy strategy, but 0/1 Knapsack Problem is not possible to solve in this method. In this paper we have described a DNA computing model to find the optimal solution of 0/1 Knapsack problem. Here we have used a unique strategy to encode data inside DNA. We have replicated the DNAs and in the later stage took the combination of each and every DNA to form double stranded DNAs in order to find out the optimal solution. This method is a clear evidence for the ability of DNA computing solving hard numerical optimization problems, which is not a very easy work to solve with the help of traditional electronic computers.

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In this paper, the effect of shorting wall length on the circular polarization of shorted microstrip patch antenna is examined. The theoretical analysis is based on the High Frequency Software Simulator (HFSS®). A designed antenna for the GPS application at the civilian GPS frequency (1.575 GHz) has been fabricated and measured. The measured data for the fabricated antenna is taken by 8719 ES vector network analyzer. Results of the designed antenna show good circularly polarized with a reduction in its size by 24.6 % from the conventional rectangular microstrip patch antenna. Simulated and measured results for the proposed antenna are presented.

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Power quality standards (IEEE-519) compel to limit the total harmonic distortion (THD) within acceptable range caused by rapid usage of power electronic equipment. This paper envisages on the simulation of instantaneous active and reactive theory based shunt active filter with MATLAB/ Simulink, as a better solution for reduction of the harmonics.

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E-learners can experience the best learning when the web based material provides interactive communication; and information presented in a different ways with the control over learning. This expectation shifted the E-Learning course delivery from simple presentation of learning content to learning objects with the power of E-Learning standards. The feasibility study is made on the derived Instructional Design Template for further incorporation with the SCORM model. In this research, the usage of SCORM standards which improve the quality of eLearning content is analysed.

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Parallel query processing has attained a lot of attention in the database community because customer applications on databases are growing in size and complexity with an ever increasing demand for performance. The main objective of parallel query processing is to achieve speedup, scaleup and high throughput. Earlier bracket model was used for parallelization. In case of bracket model it is not possible to possible to execute two operators in one process without resorting to some thread or coroutine facility. Also bracket model involves expensive interprocess communication system calls even in the cases when an entire query is evaluated on a single CPU. To overcome all these difficulties of bracket model we have developed a new model in which a single operator is used for parallelization. As compared to bracket model, all issues of control are localized in one operator (parallelizing operator) in this model. Also we can execute a complex query in a single or with a number of processes by using one or more parallelism operators in the query evaluation plan.