Past Issue

The presence of large quantities of toxic metals such as mercury, lead, cadmium, zinc or others, poses serious health risks to humans, and this threat puts the scientific community under pressure to develop new methods to detect and eliminate toxic contaminants from wastewaters in efficient and economically viable ways. Industrial and agricultural effluents are a major cause of heavy-metal contamination, thus the removal and recovery of heavy metals from effluent streams is essential to the protection of the environment.

ZnO is a wide band-gap (3.37 eV) II–VI compound semiconductor with hexagonal wurtzite structure. Zinc oxide films were deposited by electrode position, containing very low concentrations of sodium citrate and 30% hydrogen peroxide. Ammonium hydroxide is added to control the reaction. The structural analysis were initially studied with X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS). The average grain size is measured to be 48nm.

Rice husk is a removal waste from its grain that can be used as an absorber in the distillation process using solar energy (sunlight) to convert seawater into clean water. This process will be supported by carrying out necessary study on the material properties to be used as the absorbent which is made of rice husk briquettes. The chemical composition of rice husk obtained after the process comparing to before the process of distillation using SEM. The study using SEM, there is an increase before and after the process distillation.

The aim of this paper, is to apply a new method called Variation Iteration perturbation method ((VIM)) to porous medium equation. This method is a combination of the new integral “Variation Iteration” and the perturbation method. The nonlinear term can be easily handled by perturbation method. The porous medium equations have importance in engineering and sciences and constitute a good model for many systems in various fields. Some cases of the porous medium equation are solved as examples to illustrate ability and reliability of mixture of Variation Iteration and perturbation method.

In this paper we introduce a brief review about Box-Jenkins models. These models provide a very good method to forecast for stationary and non-stationary time series. Box and Jenkins technique is used to find the best model for inflation rates in Sudan. To achieve this objective, a series of inflation rates ranged from 1998 to 2013 were obtained from the annual reports of the Central Bank of Sudan. The estimation concludes that the most proper time series model to forecast the inflation rate in Sudan is the AR (1), MA (3) model.

This paper focuses on education and economic development in Nigeria. One of the essences of education is to produce human resources that are skillful and knowledgeable; positioning man to be a critical resource upon which national economies, especially that of a developing nation like Nigeria hinge upon. In this paper, an attempt was made to correlate Nigeria’s investment in education since independence and economic development so far attained, analyze the issues and  challenges  of economic development, the current state of education in Nigeria and the way forward.

The purpose of the research work is to highlight ways of improving organisational effectiveness in Nigeria public enterprise. specifically, the study aimed to pursue the following objectives : to determine the effect of organisational culture on organisational effectiveness in  Nigeria public enterprise, to ascertain the nature of relationship between corporate ethic and organisational Effectiveness in Nigeria public enterprise, to determine the effect of strategic management on organisational effectiveness  in Nigeria public enterprise.

The article aims to enrich the development of public relations research approach. The development can be conducted by deconstructing the focus of rhetorical study: from classical rhetoric to contemporary rhetoric. Rhetoric is vital to society to exist because rhetoric is the use of symbols, conducted by individuals and organizations, to influence opinions, understanding, and actions.

The material has an important role in an engineering design field. The suitable material selection for a particular product is one of the multiple criteria decision making (MCDM) problem depends on an aggregation representing by closeness to the ideal which is generated by compromise methods.  In order to complete the product requirements, experts need to analyze the performance of various and suitable materials with precise operations. In the competitive market, the material selection process is intricate and time consuming effort.

Fifteen years ago, for a product or a service to be eminent and in vogue, it was word of mouth; now it is word of mobile. E-Commerce is a global phenomenon, which brings people closer to the product. It’s expected that as much as 80-90 per cent of the overall e-commerce traffic in India will start flowing through mobile devices.