The Internet technology has enabled companies to create a new market space that facilitates electronic interactions among multiple buyers and sellers. It is believed that the perceived benefits of e-commerce have a great impact on e-marketplaces usage. However, research shows that supply chain management (SCM) influenced by ecommerce. The purpose of this study is to investigate the relationship between B2B e-commerce benefits, supply chain management and e-marketplace usage. The proposed model was tested on managers of companies in different Industries in Amman – Jordan. Structural equation modeling technique was employed using AMOS 7.0 to verify the reliability and validity of the multi-item scales and to test the hypothesized relationships. Finding indicates that the perceived benefits of e-commerce are significant in explaining the variation in emarketplace usage. Results also revealed that B2B ecommerce has a strong and positive direct and indirect effect on supply chain management. It has also been found that there is a significant positive impact of E-marketplace usage on supply chain management. The findings contribute to understanding the relationships between B2B e-commerce benefits, supply chain management and e-marketplace usage, provide critical implications for managers; and highlight directions for future research.

The study of refractivity and its effect at the tropospheric region is very important as the parameters help in planning for communication links. This study is aimed at calculating and estimation of refractivity at the tropospheric region with tropospheric parameters of relative humidity, absolute temperature and atmospheric pressure of January and October at Minna, Nigeria. The ITU-R, model and artificial neural network model were used. Validation results are thus, January, absolute temperature = 0.4313 K, relative humidity = 0.9989 %, pressure = 0.0201 (hpa) and October, absolute temperature = -0.3146 K, relative humidity = 0.9597 % and pressure = 0.1962 respectively. The validation of the correlation coefficient results show that all the tropospheric parameters has effects on refractivity, but relative humidity has more effect and is merely on October which was attributed to the large quantity of moisture at the tropospheric region during the rainy season which is between April to October as stated by Adadiji. From Table 1 and 2 and figure 1 to 6, it clear that ANN has the capacity of estimating refractivity since the estimated values has close agreement with the calculated values.

Many practical studies are carried out to investigate factors affecting college students’ performance. The focus of this research is that student performance in intermediate examination is linked with students’ outline consisted of his approach towards communication, learning facilities, proper guidance and family stress. The research is based on student profile developed on the bases of information and data collected through assessment from students of a group of private colleges.

The mosquito repellent activity of phytochemical extracts from Peels of five citrus fruit species, Citrus sinensis, Citrus limonum,Citrus aurantifolia, Citrus reticulata and Citrus vitis, was investigated. The volatile phytochemical extracts were obtained from processed air-dried and powdered citrus fruit peels by Soxchlet extraction using Diethyl Ether as solvent. Five different concentrations, 5%, 10%, 15%, 20% and 25% (volume by volume) were prepared from each extract stock. Topical application of the extract concentrations on human volunteers revealed that 20% and 25% repelled mosquitoes 2 hours and 5 hours, respectively. Short-lived and mild skin itching and sneezing reactions were observed as side effects. This study has shown that phytochemical extracts from species of citrus fruit have good promise for topical repellence against mosquitoes generally.

Component Based Software Engineering (CBSE) approach is based on the idea to develop software systems by selecting appropriate components and then to assemble them with a well-defined software architecture. (CBSE) offers developers the twin benefits of reduced software life cycles, shorter development times , saving cost and less effort as compare to build own component. However the success of the component based paradigm depends on the quality of the commercial off-the-shelf (COTS) components purchased and integrated into the existing software systems. It is need of the time to present a quality model that can be used by software programmer to evaluate the quality of software components before integrating them into legacy systems. The evaluation and selection of the COTS components are the most critical process. These evaluation and selection method cannot be resolved by the IT professionals itself. In this study the author tried to compare the twenty three available systematic methods for best evaluation and selection of COTS components.

The purpose of this study is to assess the prescriptions pattern of penicillin and cephalosporin antibiotics among physicians at Sacred Heart Hospital Lantoro Abeokuta and determine their conformity with standard guidelines and principles of antibiotic use. It was a retrospective study involving data obtained from outpatient case notes that were prescribed with cephalosporin and penicillin antibiotics during the 6 months period of January to June 2010. A total of six hundred and fourteen (614) case notes were randomly selected and used for the study. One hundred and sixty seven (167) (27%) patients were of the age group 0 - 9 years, 31(5%) patients were aged 10 – 19 years and 226 (37%) patients were of age group 20 – 29 years . Four hundred and forty (440) (71.7%) patients were males while 174 (28.3%) patients were females. Among diagnosis studied were upper respiratory tract infection (URTI) 238 (38.8%) and lower respiratory tract infection (LRTI) (21.0%) (p = 0.00393) (p<0.05). There was no definite diagnosis (NDD) made in 37 (6.02%) cases.

The concept of mass production essentially involves the assembly of identical or interchangeable parts of components into the final product at different stages and workstations. The relative advantages and disadvantages of mass or flow production are a matter of concern for any mass production industry. How to design an assembly line starting from the work breakdown structure to the final grouping of tasks at work stations has been discussed in this paper using two commonly used procedures namely the Kilbridge-Wester Heuristic approach and the Helgeson-Birnie Approach. Line Balancing (LB) is a classic, well-researched Operations Research (OR) optimization problem of significant industrial importance. The specific objectives of this paper is to optimize crew size, system utilization, the probability of jobs being completed within a certain time frame and system design costs. These objectives are addressed simultaneously, and the results obtained are compared with those of single-objective approaches.

The aim of this paper is to propose a new control law for induction motor squirrel cage that is deemed by its strength, high torque mass, and its relatively low cost ... etc, meanwhile, it benefited from the support of industry since its invention. Despite these advantages, these actuators are complex dynamic systems that exhibit a strong non-linearity, which makes them difficult to control. So, the variable structure control is a solution for this problem because it is robust control despite the uncertainty on the model, disturbances and parametric variations. In practical applications, the main disadvantage associated with the command is the phenomenon of chattering. In order to minimize the amplitude of oscillations we propose a new technique of variable structure control which is softened several ramps. A simulation results revealed some very interesting features.

The aim of this paper is to evaluate a summation formula based on half argument allied with Hypergeometric function and involving recurrence relation and Gauss summation theorem.

This study was carried out with the aim of determining magnitude of G x E interaction for body weights for Kuchi chicken ecotype of Tanzania reared under intensive (on-station) and extensive (free-range) management systems. Body weight was assessed at 8 (Bwt8), 12(Bwt12), 16(Bwt16), and 20(Bwt20) weeks of age. Results for this study indicated average performance in all body weight measurements was significantly higher under intensive management compared to extensive management (P< 0.001), signifying two diverse environment and hence possibility for G x E interaction. Based on magnitude of genetic correlation for the same trait measured in two environments ( rg ) G x E interaction for all body weight measurements were found to be substantial (i.e. biologically important). Value for rg was 0.745, 0.757, 0.752 and 0.753 for Bwt8, Bwt12, Bwt16 and Bwt20, respectively. Since breeding program for improving performance of the ecotype would be more feasible under intensive management and hence more likely to take place under such environment, based on results of this study, if such breeding program is to be implemented, sensitization of smallholder farmers (beneficiaries of the breeding program) to shift from their current system of management (extensive management) to at least semiintensive system of management is recommended for minimizing the effect of G x E interaction.