Archives-March 2012

Current FPGA soft processor systems use dedicated hardware modules or accelerators to speed up data-parallel applications. This work explores an alternative approach of using a soft vector processor as a general-purpose accelerator. Due to the complexity and expense of floating point hardware, these algorithms are usually converted to fixed point operations or implemented using floating-point emulation in software. As the technology advances, more and more homogeneous computational resources and fixed function embedded blocks are added to FPGAs and hence implementation of floating point hardware becomes a feasible option. In this research we have implemented a high performance, autonomous floating point vector co-processor (FPVC) that works independently within an embedded processor system. We have presented a unified approach to vector and scalar computation, using a single register file for both scalar operands and vector elements. The FPVC is completely autonomous from the embedded processor, exploiting parallelism and exhibiting greater speedup than alternative vector processors. The FPVC supports scalar computation so that loops can be executed independently of the main embedded processor.

The problem of identifying approximately duplicate records in databases is an essential step for data cleaning and data integration processes. In the real world, entities have two or more representations in databases. Errors are introduced as the result of transcription errors, incomplete information, lack of standard formats, or any combination of these factors. Most of the existing approach has been depend on the generic or manual intervention is required to calculate the edit distance. None of the existing approach hasn’t focus on how many individual operations required for edit distance calculation, existing relied on total operation. In this paper, we present a thorough analysis of the literature on edit distance for duplicate detection. We cover similarity metrics that are commonly used to detect number of individual operation required to find a duplicate record, which includes the total required edit operation.

Investor protection is one of the essential roles of authorities to make them involved in the financial market. Stock market plays a predominant role in the financial market. Investor protection helps to develop the market so that mobilization of funds can be increased. Increase in market potential is another way to increase growth of the market. Every nation has own legislation frameworks for stock market which is varying from country to country. In India, there is a strong need for an effective regulation for stock market so that the investors’ interest can be safeguarded in a better way. In order to regulate stock market and the participants of stock market there are various legislations are framed. It minimizes the risks and protects the investor. An attempt has been made to review the Indian legislations which are standardizing the Indian stock market and the legal formalities to be carried out by the market players.

Current perspectives on the early childhood curriculum stress the need for a play-based program for children. Although the status of play has been given due to emphasis in the Malaysian Preschool National Curriculum, the implementation of play in the daily practice may not be consistent with the curriculum guidelines. Therefore, this study set out to examine the preschool teachers’ perception on the implementation of play in the private preschools. This study adopts the survey method, involving 105 teachers from 35 private preschools in Tampoi and Skudai, Johor. The questionnaire comprised of 46 items modified based on the CIPP model with the focus on the Input and Process constructs. Data were analyzed using descriptive analysis (mean, rank and standard deviation). Results on input evaluation revealed that although the teachers viewed play positively, they perceived possessing only average pedagogical knowledge about the implementation of play. On the other hand, the respondents believed that parents’ attitude towards the play concept was averagely positive. The overall appropriateness and availability of resources were also rated average. As for the process evaluation, the aspects of play management and the observation of the children’s behaviors were claimed to be average. A few suggestions were highlighted in the end of the study to enhance the effectiveness of the implementation of play in preschool curriculum.

This project aims to design a cluster-based multiprocessor system-on-chip (MPSoC) combines of hybrid interconnection composed of both bus based and network on chip (NOC) architecture. Two or more microprocessors working together to perform one or more related tasks using a shared memory is commonly referred to as a multiprocessor system. NoC is used to form a network to pass the message packets more efficiently between the source and destination and to provide additional communication resources so that multiple paths can be operated simultaneously. High performance is achieved by efficient implementation of hardware and software. It is done by fine tuning MPSoC architecture in the early stage of the design process. This project uses the FPGA device to prototype the cluster-based MPSoC. This paper proposes a hierarchical architecture consisting of SMP clustered nodes, each of which is structured by more than one baseline cores through centrally-shared memory and, some parallel applications with different characteristic of parallelism, functionality and communication pattern are designed and presented in this work. In this work a pure VHDL design, integrated with some intellectual property (IP) blocks. This project accounts for the highest throughput ratio.

Broadband and Wireless are the most common adoption in the communication market during the past ten years. Users want to be able to access to multimedia applications, data and voice while still using wireless mobility. To do so a high data rate is required. Moreover, multicasting is a tool used in networking which allows a selected group of users to receive the same information, and it is particularly useful for multimedia traffic. Obviously the research on the possible techniques to obtain such connection is a challenging topic in the field of mobile communication.The technological advances in wireless communications have enabled the realization of various systems which enable us to optimally use various multimedia applications. It is envisioned that many of the future wireless systems will incorporate considerable signal processing intelligence in order to provide advanced services such as multimedia transmission and detection. In general, wireless channels are hostile media to communicate, due to substantial physical impediments, primary radio frequency interference and time varying nature of the channel. The need of providing universal wireless access at high data- rate (which is the aim of many emerging wireless applications) presents a major technological challenge, and meeting this challenge necessities the development of advanced signal processing techniques for multiple- access communications in non- stationary interference rich environments. In this paper we present advanced signal processing methodologies for Multiple Access Interference (MAI) suppression in multiuser communication environment, while considering the transmission over Rayleigh fading channel. We also considered the effect of Doppler shift. A new model for realization of Rayleigh fading channel has been proposed. The statistical tests performed on the proposed channel were found satisfactory.

In this work, the vibrational spectral analysis is carried out using FTIR and FT Raman spectroscopy in the range 400-4000cm-1 and 50-3500 cm-1, respectively, for the molecule 2-6-dichlorobenzyl chloride. The molecular structure, fundamental vibrational frequencies and intensity of the vibrational bands are interpreted with the aid of structure optimizations and normal coordinate force field calculations based on HF and DFT methods with 3-21 + G basis set. The complete vibrational assignment for different normal modes of the molecule is done. Mulliken population analysis, charge distributions, thermodynamic properties and HOMO-LUMO are also discussed. With the help of specific scaling procedure, an excellent agreement between observed and calculated frequencies has been made.

This work proposes a methodology for QoS improvement in MANET based on Medium Access Control (MAC) protocol that takes the above requirements into consideration. This protocol is based on IEEE 802.11 standard, and thus can be easily integrated into existing systems without much difficulty. Here 802.11 and 802.11e with different TCP mechanisms are used to analyze the QoS parameters for MANETs. The proposed system is designed to evaluate the performance of QoS and interaction between Transport layer and the MAC layer protocol operating in a mobile ad hoc network. The system will makes use of IEEE 802.11e MAC mechanism, to improve quality of service in MAC layer, which will improve the quality of service in Transport layer and to suggest a suitable mechanism for improving the quality of service in MANETs.

The present paper discusses the development of a Markov model for performance evaluation of water circulation system of a thermal power plant using probabilistic approach. A water circulation system ensures a proper supply of water for smooth working of a thermal power plant. For regular and economical generation of steam, it is necessary to maintain each sub- system of this system to ensure an optimum level of availability. In present paper, the water circulation system consists of five subsystems with three possible states i.e. working, reduced and failed state. Failure and repair rates of subsystems are taken to be constant. After drawing transition diagram, differential equations have been generated. After that, steady state probabilities are determined. The system of equations is solved for steady state availability of the system using Laplace transformation technique. Besides, some decision matrices are also developed, which provide various performance levels for different combinations of failure and repair rates of all subsystems. Based upon various performance values obtained in decision matrices and plots of failure rates/ repair rates of various subsystems, performance of each subsystem is analysed and then maintenance decisions are made for all subsystems. The developed model helps in comparative evaluation of alternative maintenance strategies.

Twenty one (21) rock samples were systematically collected during geological mapping of the study area, while 10 representative samples were selected for geochemical and petrography studies. Six lithologies including Quartzite, Quartz-biotite schist, Banded gneiss, pegmatite, biotite gneiss and biotite schist with well defined boundaries were recognized and mapped in the study area. Thin sections were prepared from the rock, and were studied under the research Petrological Microscope. The results of the petrographic analysis of the thin sections revealed that minerals such as quartz, biotite, muscovite and feldspar (plagioclase, orthoclase and microcline) of variable composition were present in the slides. The presence of these minerals could be as a result of the type and nature of magma responsible for the emplacement of these rocks. However, quartz is the most resistant and dominant mineral in all the slides analyzed. Geochemical analysis was also carried out on the rock samples to determine the trace and rare earth elements in them. The results of the trace elements detected in (ppm) includes; Ba (338), Cd (0.054), Ce (42.19), Rb (129.99), S (0.036), Sr (42.7), Th (4.94), Y (4.97), Zn (29.39), Co (39.18), Cs (1.97), Cu (3.86), Li (5.02) Ni (18.05) and W (179.05). The rare earth elements include; Dy (1.68), Eu (0.58), Ga (9.89), Gd (2.70), Hf(1.07), La (20.69), Nd (18.05), Pr (4.92) and Sm (3.40). The results above revealed that Ba, W, Rb, Ce are extremely high in the rocks of the study area which indicate that the rocks are highly radioactive in nature. The concentration of radioactive elements such as Ba, Rb, Ce are useful in energy provision and modern warfare business. Nevertheless, radioactive elements may produce X-ray which can affect the skin and causes skin cancer and other related diseases. Therefore, detailed exploration program to discover hidden natural resources is hereby recommended for the study area.