Grinding is primarily a finishing operation where high temperature at the wheel-work interface adversely affects the physical properties of the ground surface in terms of induced surface and sub surface residual stress, surface roughness, micro cracks and dimensional deviation. Conventional application of cutting fluid often cannot control the high temperature generated especially during high speed grinding. Besides, environmental pollution, effect on human health and higher cost has been a great concern of researchers and industries. One of the possible solutions of such problems is the Minimum Quantity Lubricants (MQL) technique which has both economical and environmental advantages. The present investigation is to evaluate the influence of MQL on chip formation mode and surface roughness in grinding AISI 1045 steel with CBN wheel at different level of process parameters. The result indicated that, MQL enables the reduction in surface roughness and more favorable chip formation mode compared to dry grinding. The whole experiment has been repeated with Alumina wheel under same experimental conditions to assess the performance of CBN wheel. A Response Surface model has been developed to predict the surface roughness while grinding AISI 1045 steel with CBN wheel under MQL technique. The model is then checked and validated by comparing with experimental results and found reasonably accurate.

Dental plaque is one of the etiologic factors in gingival and periodontal disease. Considering the uses of lemongrass oil the aim of the present study was to find out the antiplaque property in vitro. Pooled saliva was put into the tissue culture plates and incubated for 72 hours for plaque. Each of the 4 wells were treated differently with using disclosing agent, lemongrass oil mouthwash( 0.25 % & 0.5%), distilled water, glodent tooth paste slurry and chlorhexidine mouthwash. The results showed that the lemongrass oil mouthwash at both the concentration showed reduction in the plaque better than that of chlorhexidine. The glodent toothpaste slurry reduced the plaue to a lesser extent to that of both lemongrass oil and chlorhexidine mouthwash. The present study concluded that the lemongrass oil mouthwash can be used as an adjunct to the mechanical oral hygiene.

This paper presents an methodology for attaining high availability to the demands of the web clients. In order to improve in response time of web services during peak hours dynamic allocation of host nodes will be used in this research work. As web users are very demanding: they expect web services to be quickly accessible from the world 24*7. Fast response time leads to high availability of web services, while slow response time degrades the performance of web services. With the increasing trend of internet, it becomes a part of life. People use internet to help in their studies, business, shopping and many more things. To achieve this objective LAMP platform is used which are Linux, Apache, My SQL, and PHP. LAMP is used to increase the quality of product by using open source software. The proposed strategy will work as middle layer and provide highly availability to the web clients.

OFDM is one of the most popular modulation techniques that is been widely used in most of the wireless and wired communication links. The OFDM architecture consists of QAM modulator and orthogonal frequency modulator. In this work we propose DMWT based orthogonal frequency modulator for achieving higher BER. The IDMWT architecture is designed considering N=4, thus the preprocessing unit converts the QAM samples of N to 2N and is modulated using DMWT filters. The filtered output is further transmitted and is received at the receiver. During the post processing, N samples are extracted by use of DMWT demodulation technique. The complex architecture of IDMWT and DMWT are reduced for its complexity and speed by the modified architecture. The DMWT architecture is modified for FPGA implementation improving the area, power and speed performances. The modified DMWT architecture is implemented on VirtexII pro FPGA which operates at 300MHz frequency and occupies area of less than 1%, with power consumption less than 28mW. The proposed design is suitable for real time and low power applications.

future Wireless communication requires high performance and high speed integrated data, audio, video and multimedia services. This performance is achieved using discrete wavelet transforms in terms of ISI and bandwidth compatibility over FFT based OFDM. Where FFT based OFDM has very compact spectral utilization which cannot satisfy the future needs. This project proposes implementation of new modified lifting wavelet transform for designing wavelets and performing the transform. By implementing LDWT, it is able to increase the spectral efficiency and also decrease the bit error rate. This paper presents a performance measure of mean squared error by using lifting wavelet transform. This paper shows that DWT-OFDM outperformed FFT-OFDM by approximately 6dB gain in BER, Haar wavelet showed best performance over other wavelets by approximately 2dB. However, computation complexity of DWT restricts use of DWT for OFDM due to its hardware requirements on VLSI platform. In this work, lifting based DWT is modified and a new architecture is derived that can compute DWT in less than 3.429ns, and consumes power of less than 28mW. The modified DWT is realized on Virtex II FPGA and occupies resources less than 114 slices. Thus the proposed DWT architecture is suitable for OFDM application.

Based on the review of three perspectives of language development, this paper is aimed to focus on interactionalist’s position and provides insights into the influences of it on English as a foreign language teaching (EFLT).

The prevalence of parasitic eggs and parasite cysts on computer mouse and keyboard in School of Science and Computer Studies, Federal Polytechnic, Ado-Ekiti, Nigeria was investigated. The total number of samples examined was one hundred and eighty (180) of which twenty nine (29) were positive. The result showed that the samples collected during the first, second, and third weeks had 13, 10, and 6 numbers of cysts and ova respectively. The highest incidence was observed during the first week. Some bacteria such as Staphylococcus aureus, Streptococcus pyogenes, Pseudomonas aureginosa and Enterococcus faecalis were also isolated from the sample with the highest incidence found in Staphylococcus aureus. It was concluded that the mouse and keyboards could be a source of disease transmission and should be disinfected appropriately and often.

Rapidly expanding computing domain has forced educational institutions to up-grade existing curricula of computing degree programs. Recently, a joint task force of Association for Computing Machinery and IEEE-Computer Society has published the Strawman Draft of Computer Science Curricula 2013. The Draft has introduced some new ideas to keep computing curricula modern and relevant. The recommended curricula have designed in the light of 6% response rate of the conducted survey. This paper has pointed out some important aspects which need attention to meet the challenges of the 21st century. These aspects include an Ad-hoc approach towards the core body of knowledge, incomplete curriculum guidelines, over-ambitious contents and learning outcomes. Some other missing aspects include computing dispositions, global education, 21st century skills, guideline for inclusion and the hidden curriculum. It is believed the recommendations of this paper may generate some thought provoking ideas to make the computing curricula more robust and effective.

Nowadays, along with air pollution and water pollution, noise pollution also hits the public life and creates problems to normal the life. Noise pollution around the educational institutes of Nagaon town of Assam, India produces multi problems to the teaching-learning process and negatively affects the performance of both teachers and students. The noise level should be in the range of 40 dB (A) to 50 dB (A) in and around an educational institute. But it exceeds in all cases. A study of this problem was carried out in some educational institutes of Nagaon town, Assam, India by taking measurement on noise level in dB (A) with the help of Noise Level Meter and by questionnaire supplied to students, teachers and officials. The analyzed result clearly shows that the rate of noise level in all the institutes (in and out) is very high and not suitable for teaching-learning process. Therefore Acts and regulations concerning noise pollution should be strictly adopted.

The main objective of the study is to identify the impact of Systematic risk management on Profitability, during 2007 to 2011 (05 years). In the present study, Systematic Risk Management [i.e., Degree of Financial leverage (DFL) and Degree of Operating leverage (DOL) as independent variable and Profitability (i.e., Net Profit, Return on Capital Employed (ROCE) and Return on Equity (ROE)] as the dependent variable are considered. In order to select the sample, convenience sampling techniques method is used. The study suitably used both secondary data. Operational hypotheses are formulated, results revealed that systematic risk management has a positive association(r= 0.755, p<0.05) with Profitability. Further, Systematic risk management is enhanced by DFL and DOL in the selected financial institutions where the beneficial impacts are observed on profitability. Therefore, they have to pay more attention for tuning systematic risk management techniques. This study would hopefully benefit the academicians, researchers, policy-makers and practitioners of Sri Lanka and other similar countries through exploring the impact of systematic risk management on profitability, and pursuing policy to improve the current status of it.