Archives-December  

The purpose of this study was to examine Biology students’ weaknesses as far as graph work is concerned. The target population was SHS 3 students offering biology as an elective science subject in Senior High Schools in the Cape Coast Metropolis during the 2009/2010 academic year. However, the accessible population was elective biology students from six schools in the Cape Coast Metropolis. At each school an intact class was randomly selected and used. In all a sample size of 230 students was used. The study revealed that elective biology students have difficulty with providing headings, an appropriate scale, and labeling the axes of graphs.

The study was carried out to investigate the bacteriological status of freshly sliced water melon in mile III market Port Harcourt. A total of 20 sliced water melons was collected while one whole water melon collected was used as control in this study. The control sample was properly washed with sterile water and sliced aseptically. A sterile knife was used to cut 1.0g from each water melon sample and homogenized on a sterile mortar and pestle. The resultant homogenate was pipette (1.0ml) into 9.0ml of distilled water and serially diluted. The 104 dilution was plated out on Nutrient and MacConkey agar plates respectively using spread plate technique. The plates were incubated at 370c for 24 hours. The cultured plates were examined for colony growth and identification of isolates. The result showed that bacteria isolated from the sliced water melon were Staphylococcus aureus, Escherichia coli , Bacillus spp and Proteus with percentage bacterial count of 414 (45.8%). 324 (35.5%), 144 (15.8%), and 30 (3.3%.) respectively. The control sample showed a scanty growth of staphylococcus aurus. In conclusion, since the control had only a colony of staphylococcus on culture plate after it has been hygienically processed, contamination of the sliced water melon maybe due to poor sanitary condition employed by the vendors during processing and packaging. This is of public health concern as these organisms are known causes of food born diseases and food poisoning.

In this study an attempt has been made to describe the analysis of epidemiological study by Bayesian methods and apply this methodology to district level child mortality of Uttar Pradesh to assign rank to each district for rural and urban separately. The specific objectives of this study are to analysis of epidemiological study by use of fixed effect modeling and random effect modeling in Bayesian setup. To assign rank to each district by this suggest applying strategies to reduce child mortality in those district for those ranks are poor in Uttar Pradesh. The modified retrospective cohort study design used here. For fixed effect modeling beta-binomial modeling approach is used and for random effect modeling logit link function is used. The posterior estimates came in both cases under squared error loss function.

Equalization techniques compensate for the time dispersion introduced by communication channels and combat the resulting inter-symbol interference (ISI) effect. The purpose of an adaptive equalizer is to operate on the channel output such that the cascade connection of the channel and the equalizer provides an approximation to an ideal transmission medium. This paper compares existing adaptive algorithm for channel equalisation for both DFT and DCT based OFDM system. Simulations results show that performance of Transform Domain Variable stepsize Griffith LMS(TVGLMS) algorithm in channel equalization performs with better convergence speed and better error misadjustment than the LMS algorithm. Further simulation results shows that DCT based OFDM system outperforms DFT –OFDM in terms of BER and PAPR .

In metalworking, rolling is a metal forming process in which metal stock is passed through a pair of rolls. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, and cold rolling processes the most tonnage out of all cold working processes. This article describes the use of advanced tubing inspection NDT methods for boiler and heat exchanger equipment in the petrochemical industry to supplement major turnaround inspections. The methods presented include remote field eddy current, magnetic flux leakage, internal rotary inspection system and eddy current.

In this paper we derive new formulas for the number of spanning trees, of some product graphs such as cartesian product, tensor product, composition product, normal product, and strong sum using linear algebra, Chebyshev polynomials and matrix theory techniques.

An algorithm for computing a discrete generalized Hankel-Clifford transform is presented in this paper. In the solution of certain types of differential equations this algorithm can provide a major improvement in speed and accuracy over previously described methods. An application to a particular form of the transport equation relevant to a class of problems in electron scattering is given.

The present research intends to study any relation between organizational culture and suggestions system. It is an explanatory one from among different types of applicable researches and from method viewpoint. Therefore two separated questionnaires were applied for this purpose. The first one is related to organizational culture with 23 closed questions. The second one is related to measuring any cooperation through suggestions system. Upon ensuring about narration and survival of measuring tools, both questionnaires were distributed among members of a sample consisting of 30 persons of a statistical population including headquarter personnel of quarter areas of Education Department. According to the findings, there is a meaningful relation between organizational culture parameters and suggestions system. Finally there are some proposals for betterment and upgrading all cultural dimensions in order to have more promotion of suggestions system in mentioned organization.

The problem with AES, most extensively used encryption, is that it uses many multivariate equations which are linear in nature . Thus it can be broken using algebraic cryptanalysis. This provides a serious threat as AES was considered to be unbreakable and thus it was used in many encryption systems. The DES predecessor of AES has problem of multivariate linear equation and speed. By exploiting the key steps and vulnerabilities in these algorithms it is possible to break through AES and DES secured data.

We are very happy to announce that from 29th December 2011, Dr. J. Thomas Joseph Prakash has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Crystal growth and Thin films. J. Thomas Joseph Prakash is currently working at Department of Physics, H. H. The. Rajah's College (Autonomous), Pudukkottai - 622 001, Tamilnadu, India. The appointment of J. Thomas Joseph Prakash as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to chiefeditor@elixirjournal.org. Sincerely Editor-in-Chief