Current Journal of Applied Science and Technology <p style="text-align: justify;"><strong>Current Journal of Applied Science and Technology (ISSN:&nbsp;2457-1024)</strong>&nbsp;is dedicated to publish research papers, reviews, case studies and short communications from all disciplines of science and technology. By not excluding papers on the basis of subject area, CJAST facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated. Subject areas cover, but not limited to, medicine, physics, chemistry, biology, environmental sciences, geology, engineering, agriculture, biotechnology, nanotechnology, arts, education, sociology and psychology, business and economics, finance, mathematics and statistics, computer science, social sciences, linguistics, architecture, industrial and all other science and engineering disciplines. By not excluding papers based on novelty, this journal facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open-access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Current Journal of Applied Science and Technology 2457-1024 Urban Consumers' Educative Value Attached on Quality and Safety of Milk from Different Media Channels in Nairobi Kenya <p>Agricultural advisory services inform urban consumers about milk safety and quality information through diverse media channels. Communication about milk is vital in educating consumers to make informed, healthy food choices. However, knowledge gaps exist on whether the dominant message theme by media targets educating consumers. This study sought to fill these knowledge gap. Thematic content analysis of newspaper articles was used (n=215) and researcher-administered questionnaires (n=131) was used in Nairobi city. The respondents involved in the study were 131.The frequencies of text data were determined, and the dominant message themes were identified using Chi-square test statistics. The respondents rated media sources for educative value, on a Likert scale (1 to 5). Results revealed that the dominant print media message themes were innovations for enhancing good quality milk (36.7%), causes of poor-quality milk (43.7%), benefits of quality milk (10.7%), and risks of poor-quality milk (8.8%). The relative consumer trust for information disseminated by agricultural advisors through different media channels was in the order of television (20.2%), radio (19.5%), product advertisement (16.7%), social media (13.5%), newspapers (12.4%), public extension (7.5%), research by university (6.8%), and lastly extension magazines (3.4%). Consumers placed greater trust on messages disseminated through television, which in their perception was of greater educative value to them.</p> Charity Khanyeleli Justus Ombati Bockline Omedo Bebe ##submission.copyrightStatement## 2023-01-07 2023-01-07 8 15 10.9734/cjast/2023/v42i14042 Sex Determination by Metric Analysis of Coronoid and Mental Breadth of the Mandible – Nigerian Study <p><strong>Aim:</strong> This research aimed at investigating the applicability of linear measurements of Bicoronoid (BRB) and Bimental Breadth (BMB) of mandible in sex determination in four geo-political zones in Nigerian.</p> <p><strong>Study Design: </strong>A cross-sectional descriptive study was adopted for this research.</p> <p><strong>Place and Duration of Study:</strong> Anthropometric data were obtained from adult mandibles from selected medical schools across four geo-political zones in Nigeria from January to June 2021.</p> <p><strong>Methodology: </strong>52 males and 30 females mandibles were used for this study. Bicoronoid Breadth (BRB) and Bimental Breadth (BMB) were measured using vernier caliper and data analyzed using SPSS IBM version 23.0.</p> <p><strong>Results:</strong> Descriptive analysis of BRB and BMB showed higher mean values for males 98.25mm and 45.79mm than females 90.99mm and 44.03mm respectively. Independent t-test analysis of the parameters showed significant sexual difference at 95% confident interval. The discriminant function analysis sufficiently discriminated sex and after cross-validation, BRB accurately predicted 82.7% males and 53.3% females while BMB accurately predicted 84.6% males and 26.7% females.</p> <p><strong>Conclusion: </strong>Bicoronoid and Bimental breadth measurements of mandible are recommended for sex determination in forensic investigation due to its role in sexual dimorphism.</p> Iboro E. Edet E. J. Olotu E. I. Edibamode ##submission.copyrightStatement## 2023-01-24 2023-01-24 16 23 10.9734/cjast/2023/v42i14044 Modelling and Simulation of the Earth-to-Air Heat Exchanger in Laminar Air Flow Regime for the Passive Cooling of Buildings <p>The earth-to-air heat exchanger is a very energy efficient system for preheating and cooling premises, which consists of circulating air through a tube buried at a certain depth in the ground. The temperature of the ground is less variable than that of the outside air, so that the air leaving the exchanger is more temperate. In the warm periods of the year, the air is cooled while it is warmed during the cold periods. The present work is devoted to the modelling and numerical simulation of the mixed convection earth-to-air heat exchanger in laminar regime. The mixed convection equations governing the heat transfers in the earth-to-air heat exchanger and in the building as well as the boundary and initial conditions have been presented and discretized using the finite difference method with an Alternate Direction Implicit (ADI) scheme. The linear algebraic equations obtained are solved using the Thomas algorithm combined with an iterative Gauss-Seidel procedure. The results show that the flow is dominated by forced convection. The analysis of the effect of Reynolds number indicated that the temperature, average Nusselt number and earth-to-air heat exchanger efficiency increase with Reynolds number.</p> Yendouban Kolani Kokou N’wuitcha Yawovi Nougbléga Magolmèèna Banna Belkacem Zeghmati ##submission.copyrightStatement## 2023-01-27 2023-01-27 24 49 10.9734/cjast/2023/v42i14045 About Animals, Numbers and Teaching: Linking Mathematics and Biology in Evolution <p>The implications of Charles Darwin’s studies on evolution reach many areas of knowledge. The influence on researchers as Sewall Wright, John Haldane and Ronald Fisher among others, were very important for the selection on husbandry animals. Therefore, the aim of this text is to demonstrate the importance of the relationship between Biology and Mathematics in the construction of new pathways that afford a theoretical framework and the resulting practical applications of these subjects on education.</p> Rossano André Dal-Farra ##submission.copyrightStatement## 2023-01-02 2023-01-02 1 7 10.9734/cjast/2023/v42i14041