Archives-October 2011

This study examines the problem of MHD mixed convection flow between a horizontal parallel flat wall and a long wavy wall in the presence of thermal radiation, Dufour effect and first order chemical reaction embedded with slip boundary condition. The governing equations include the continuity, linear momentum, energy and mass transfer equations which are solved analytically by using exact solution method. The results of this parametric study on the velocity, temperature and concentration distributions are shown graphically and the physical aspects of the problem are highlighted and discussed. The effect of shear stress, rate of heat and mass transfer coefficients at the channel walls are displayed in tables.

Heart Attack and other cardiac diseases have shooted up the death rate in the world in recent years. So they have to be given more importance. Though the Heart transplantation techniques has originated in 1960’s it gained popularity only in 1980’s, after the invention of Anti Rejection Medicine. Now the advancement is such that, the patient’s old heart ECG can alone be monitored by suppressing the interference arising from the new heart, which ease the job of the surgeon, which can be achieved using Adaptive Noise Cancellation Technique. The algorithms such as LMS and RLS were implemented using MATLAB 6.5 and simulated and synthesized using Modelsim and Leonardo spectrum VLSI tools. In future the design will be fused into a chip and dedicated to mankind.

The aim of the present study was to develop Ropinirole hydrochloride nanoparticle and to study its release profile. Ropinirole hydrochloride alleviates this deficiency by stimulating striatal dopamine receptors. Ropinirole hydrochloride has got complete but variable oral absorption with less bioavailability approximately 50%. Hence, nanoparticles of Ropinirole hydrochloride was developed to improve drug diffusion profile and hence the oral bioavailability. Ropinirole hydrochloride nanosuspension stabilised by poloxamer F-68 was first prepared by milling technique and was lyophilized to obtain nanoparticle using mannitol (1:1 w/v) as cryoprotectant. Developed nanoparticle was characterized for its particle size and size distribution, drug content and % drug entrapment. In vitro dissolution study using dissolution bag (12000 D) and ex vivo study in rat ileum were carried out using 0.1N hydrochloric acid as dissolution medium. Particle size, Zeta potential, % drug content and % drug entrapment of the nanoparticles of the Ropinirole hydrochloride were found to be 282nm±23, 54.9mV±9.36, 98.9±0.86% and 62±0.87% respectively. In vitro, ex vivo permeation study revealed that cumulative percentage drug permeated was found to be 73.7±1.9% and 65.26±1.1% in 24 hrs. From the results it could be considered that the developed ropinirole hydrochloride nanoparticles may be an alternative for the treatment of Parkinsonism.

Mycelial biomass of the selected macro fungi namely Pleurotus florida and Calocybe indica were tested for the dye decolorisation using spectrophotmetry over a period of seven days. Among the two mushrooms selected, Pleurotus florida recorded maximum decolourisation potential with carbon source. The decolorisation efficiency of Pleurotus florida was observed to be 29.70%,50.39% and 64.15% in treatments with 1%,2%,3% carbon source, while Calocybe indica recorded decolourisation of 27.52%,35.44% and 41.38% in 1%,2%,3% carbon source.The study revealed that the macro fungi give scope for decolorisation of dye effluent.

As the world’s population grows, the need for health care increases. This necessity has caused the invasion of engineering methods in medical field. A remote sensor is connected to an amplifier via a length of cable in order to measure the required parameter in the medical field. The amplifier output contains not only the sensor signal, but also a 50- or 60-Hz component due to stray pickup from power mains. Pickup of this type is often associated with sensitive high-impedance sensors like microphones and electrodes. Such hum may prove to be merely bothersome in a high-fidelity sound reproduction system, but it can be overwhelming when attempting to measure very small voltages, such as is found when trying to obtain a patient’s electrocardiogram (ECG). This paper briefs the implementation of Adaptive noise cancellation algorithms such as LMS algorithm and RLS algorithm using MATLAB 6 (R12) suitable for real time implementation, which can be used during measurements, will be developed.

Partnerships have the potential to create significant benefits for all participants provided that there is a mutual understanding of and respect for the inputs required and the outputs sought from the arrangements by each party. The aim of this study was to explore the inputs required and the outputs achieved by partners as a function of the level of involvement required within the partnership arrangement. The study has investigated the extent to which the input criteria defined by the DTI and the output criteria defined by Kantar, within three health and safety initiatives involving home worker-employer, employee-employer, and contractor-employer partnerships varied, as a function of the level of partnership defined by Thompson and Sanders. The examination of the partnership arrangements within the three case studies demonstrated that the inputs were very similar whether the arrangements were classified as co-operation, collaboration or coalescence, although the extent of the output criteria was greatest in the case of the coalescence partnership. The results illustrated the level of inputs required within a range of partnership arrangements in the context of health and safety management and the range of outputs that might be anticipated.

The main objective of the present paper is to obtain certain new results in the aspects of Hypergeometric function. The results presented here are presumably new.

We are living in a very congested world where there are more and more vehicles. The noise and interference produced by these vehicles are enormous and their unwanted amplification of noise causes irritation. We aim to present a blind technique, enhancing speech, attenuating any kind of noise, by designing an adaptive filter depending on the nature of noise. The differentiation between speech and noise is made. This characteristic is used to derive a cost functional for speech enhancement. Adaptation is by changing two sets of weights. The simulation and synthesis of the above technique/algorithm is implemented using Verilogger pro and Leonardo spectrum.

E-learning has become an integral component of modern education system. Thus, in order to make teaching-learning effective and result oriented, various e-learning systems and strategies have been developed. In a modern cyber society like ours, updates of knowledge are on full swing. Continuing education and lifelong/social education has accordingly emerged. As a solution to these new education forms and demands, it is proposed to employ a novel e-learning mode, i.e. web-based self-learning, hybrid or blended learning in the existing educational system of all the modern colleges in Saudi Arabia where the infrastructural and other resources are very much accessible. In this research, the paper is intended to assess the relevance of e-learning programs/courses in the department of preparatory year of Jeddah Community College (JCC). While exploring the need and importance of e-learning resources/tools, the following aspects will also be taken into account: feasibilities, types, availability of e-learning tools/resources, and teacher development etc. English language is the main focus for the simple reason that the electronic resources are developed mostly in English and it is the medium of the instruction/examination apart from being the foundation of speciality programs offered at the college. It has been generally found that the modern learners are not much attracted towards the traditional mode of learning. Instead, they would like to choose a learning mode as a fun (such as gaming) which is without any burden and bindings. In this case, distance learning or blended learning mode will be quite useful. Moreover, young Saudi generation is quite friendly with computers, net and sophisticated mode of communication. Therefore, e-leaning is expected to de-burden the 21stentury Saudi learners as the system is easy to access anywhere and anytime.

The study of this paper is to estimate the impact of specific knowledge management resources (i.e. knowledge management enablers and processes) on organizational performance. The purpose of this study uses survey data from 189 managers and structural equation modelling to assess the links between specific knowledge management resources and organizational performance. The solution show that some knowledge resources (e.g. Organizational structure, knowledge application) are directly related to organizational performance, while others (e.g. technology, knowledge conversion), though important preconditions for knowledge management, are not directly related to organizational performance. The survey findings were based on a single dataset, so the same observations may not apply to other settings. The survey also did not provide in-depth insight into the key capabilities of individual firms and the circumstances under which some resources are directly related to organizational performance. The study provides to testify linking particular knowledge resources to organizational performance. Such insights can help firms’ better objective their investments and enhance the success of their knowledge management initiatives. Prior research often utilizes composite measures when examining the knowledge management-organizational performance link. This bundling of the dimensions of knowledge management allows managers and researchers to focus on main effects but leaves little room for understanding how particular resources relate to organizational performance. This study addresses this gap by assessing the links between specific knowledge management resources and organizational performance. The results show that some resources are directly related to organizational performance, while others are not.