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.

Rice Husk Ash Pozzolan as Valuable Supplement in Concrete for Industrial and Domestic Applications

Abstract: Controlled burning of rice husks at<700°C produced rice husk ash (RHA) which is predominantly amorphous silica (SiO2). RHA was used as a substitute for laterite and cement in proportions of 5%, 10%, 15%, 20%, 25% and 30% of concrete. The concrete was cured for 7 days, 14 days, 21 days, and 28 days respectively. It was observed that 20% of RHA provides the optimum strength. The effects of different particle sizes of 75, 150, 212, 300, 425 and 600 microns (µm) were tested using a compression test machine. A graph of average strength against particle size indicates 2.9 Nm-2 as the optimum strength at 75 µm and 1.2 Nm-2 as the minimum at 150 µm. From the ash size distribution, the presence of grains of several different sizes was observed. The grains were weighed using a weighing machine and a graph of particle size against percentage plotted to determine the particle size distribution. This showed that rice husk ash (RHA) is coarse grain material.

System hardening architecture for safer access to critical business data

Abstract: This paper affirms that the total cost of cybercrime to society is significant, and the threat is growing faster than the potential victims can deal with. One of the factors fueling this rapid growth is the confining of the security of a system to a specific security function. The paper therefore, presents a system hardening architecture to guide system administrators towards implementing multi-layers of in-depth protective mechanisms around stored data. System hardening is a defence strategy, where several different security measures are applied at various layers, all of which must be defeated before a module can be compromised. The protective mechanisms in this architecture are applied to the host, application, operating system, user, and the physical layers. This architecture is proposed on the premise that organisations implementing system hardening security approaches experience safer access to data, as well as decrease in the number of security breaches. http://dx.doi.org/10.4314/njt.v34i4.17

Interaction of alcohol and kola nut on brain sodium pump activity in Wistar rats.

Abstract: The effect of interaction of alcohol and kola nut on sodium pump activity was studied in Wistar rats Thirty Wistar rats were divided into six groups of five rats per group Control received a placebo (4 mL of distilled water) Groups 2–6 were treated for a period of 21 days with 10% (v/v) alcohol, 50 mg caffeine/kg, 50 mg kola nut/kg, or a combination of 10% (v/v) alcohol + 50 mg kola nut/kg, or 10% (v/v) alcohol + 50 mg caffeine/kg, respectively One day after the final exposure, brains were harvested and several biochemical parameters examined including activities of total ATPase, ouabain-insensitive ATPase, ouabain sensitive ATPase (Na+–K+-ATPase) and levels of nonenzymatic breakdown of ATP and inorganic phosphate (Pi) released Results showed that the essential enzyme of the brain responsible for neuronal function, Na+–K+-ATPase, was inhibited by alcohol–kola nut co-administration relative to control, resulting in a decreased ATP production, ion transport and action potential, leading to loss of neur

The effect of concentrated feed supplementation regimes on the nutrients digestibility of grasscutters (Thryonomys swinderianus) fed Pennisetum purpureum as basal feed.

Abstract: The study was designed to determine the effect of concentrate d feed regimes on nutrients digestibility of grasscutters ( Thryonomys swinderianus ) fed Pennisetum purpureum as basal feed. A total of fifty grower grasscutters were randomly assigned to 5 treatment groups of 10 grasscutters each with 5 replicates, two animals serving as a replicate. Treatment was 1, 2, 3, 4 , and 5 for 1, 3, 5, 7 , and 9 % , respectively, of concentrated feed served at their weekly live weight. Parameters measured included apparent coefficient of digestibility and percentage digestible nutrients. The results obtained showed that the c oefficient of digestibility showed a significant difference in all the nutrients evaluated. Percentage digestible nutrients and total digestible nutrients were also significantly affected. The high coefficient of digestibility of the various nutrients and total digestible nutrients are indications that adequate nutrients were available for growth and maintenance of the grasscutters . The findings of this study suggested that supplementation of forage with formulated concentrate can be an aid in the digestion of nutrients by grasscutters for their growth performance while in captivity. The digestibility of nutrients when concentrate supplement and elephant grass were combined , particularly 5% concentrate supplement was not affected. Based on the results, it was , therefore , recommended that it should be used in improving the growth performance of grasscutters .