Cross River University of Technology

About: Cross River University of Technology is a education organization based out in Calabar, Nigeria. It is known for research contribution in the topics: Population & Exergy. The organization has 465 authors who have published 507 publications receiving 2705 citations.

Performance evaluation of aeroderivative gas turbine models derived from a high bypass turbofan for industrial power generation

Abstract: The paper presents the evaluation of the performance of various aeroderivative gas turbine models (AGTM) derived from a high bypass turbofan engine (HBTE). The objective of the study is to determin...

Antifungal Effects of Combined Extracts of Euphorbia abyssinica and Coleus Species

Abstract: Although, different plant extracts have frequently been used singly and in combinations in folklore treatment of different ailments, the hidden truth behind their activity and efficacy is still to be fully scientifically established. Aim: To evaluate the effects of combined 50% methanol extracts of Euphorbia abyssinica (Desert Candle), and Coleus sp. on Candida albicans, Trichophyton mentagrophytes, Microsporum gypseum and Epidermophyton floccossum. Study Design: The completely randomised block design, two-way analysis of variance was used to analyse the data and Duncan’s New Multiple Range Test, for mean separation. Place and Duration of Study: The research was carried out in the Department of Microbiology, University of Nigeria Nsukka, Enugu State, Nigeria, between April 2011 and August 2012. Methodology: All the fungal strains used in the research were collected from the University of Nigeria Teaching Hospital Enugu, Nigeria. Susceptibility testing was done using a pour-plate method, while the checkerboard and Time-kill assays were employed to evaluate the efficacy of the different combinations of the two plant extracts. Results: The individual plant extracts inhibited all the fungal strains tested at different concentrations; but Coleus sp. extracts were observed to be more active than Euphorbia abyssinica extracts. The extract combinations inhibited the test fungi for more than two weeks. In the Time Kill assay, the combinations showed synergy on E. Floccossum only. It showed additive or antagonistic activity on the rest of the fungi tested. The Checkerboard combinations showed synergy on T. mentagrophytes, M. gypseum, and E. foccossum. Epidermophyton foccosum was the most susceptible among the fungi tested while C. albicans was the least susceptible. The control drug voriconazole also inhibited all the fungi tested. Significant antifungal activity (P=0.05) was observed in the checkerboard assay more than in the Time Kill assay. Conclusion: These findings simply authenticate some of the folklore claims that these plants have a wide range of curative uses, suggesting that they can be used as alternative sources of agents for the treatment of resistant fungal infections.

Evaluating the effectiveness of a smartphone speed limit advisory application: An on-road study in Port-Harcourt, Nigeria

Abstract: The development of mobile phone applications that provide speed limit advice and warnings offers opportunities for use of the technology in the improvement of driver safety. This paper looks at the effect of an advisory Intelligent Speed Assistance (ISA) application on driver speeding behaviour. Twenty participants (all males within the age range of 35–60 years) completed a within-group experimental design. Participants drove in real traffic on a 46 km test route which incorporated three-speed limits zones (50 km/h, 60 km/h, and 80 km/h speed limits) and aggregated into 10 different segments. Compared with baseline levels, possible impacts of ISA system functionalities on driver behaviour were studied through appropriate metrics including cumulative speed distribution, mean speed, speed deviation, 85th percentile speed, percentage distanced travelled above the speed limit, and safety benefit estimation. Results indicated the use of the ISA application led to significant improvement in speed limit compliance particularly in the 60 km/h and 80 km/h zones where speeding was eliminated. There were no observed negative effects on driver speeding behaviour from the use of the system. In general, the findings suggest the use of the ISA system, resulted in the adoption of vehicle speeds that are likely to improve road safety.

Lumber recovery efficiency in the Artisanal sector in Cross River State, Nigeria

Abstract: A study on lumber recovery efficiency was carried out to quantify wood wastage during lumbering process in the artisanal sector. The study was carried out in randomly selected felling areas of Agoi-Ekpo, Bateriko, Kanyanban, Onyen-Ekpon and Oban all in Cross River State between October 2003 and October 2004.Five commercial timber species selected for the study were milicia excelsa , Pterocarpus osun , Nauclea diderichii , Terminalia ivorensis and Gosswellondedron spp. The study showed that log conversion in the artisanal sector result in a high degree (57%) of wastage of total tree volume while the mean recovery ratio for the species are 0.40, 0.46, 0.47, 0.42 and 0.39 for Milicia excelsa , plerocarpus osun , Nauclea diderichii , Terminalia Ivorensis and Gosswellondendron spp respectively. It is recommended that gradual phasing out of stump site wood conversion and proper saw maintenance through training among others be initiated to improve the low wood recovery observed in stump site wood conversion. Keywords: lumber, artisinal sector, recovery efficiency Journal of Agriculture, Forestry and the Social Sciences Vol 3(1) 2005: 41-50

Evaluating the Effectiveness of Deterrence Theory in Information Security Compliance: New Insights From a Developing Country.

Abstract: There is a long-held belief that deterrence mechanisms are more useful in developing countries. Evidence on this belief is anecdotal rather than empirical. In this chapter, individual compliance to information system security policy (ISSP) is examined through the lenses of deterrence theory. The effects of certainty of detection and severity of punishment on attitude towards compliance and also ISSP compliance behaviour are investigated. A survey questionnaire was distributed to gather responses from 432 individuals who are staff of a public university in Ghana. The data was analysed using partial least square structural equation modelling (PLS-SEM). The results indicate that severity of punishment has a positive effect on attitude towards compliance and ISSP compliance behaviour. However, certainty of detection neither affected attitude towards compliance nor ISSP compliance behaviour. It is recommended that organizations enhance the severity of sanctions imposed on those who violate ISSPs. Future studies should explore how users apply neutralization techniques to evade sanctions.