Adama University

About: Adama University is a education organization based out in Nazrēt, Ethiopia. It is known for research contribution in the topics: Population & Adsorption. The organization has 840 authors who have published 1010 publications receiving 5547 citations. The organization is also known as: Adama Science and Technology University & ቴክኖሎጂ ዩኒቨርሲቲ, አዳማ ሳይንስና ቴክኖሎጂ ዩኒቨርሲቲ.

Tuning Thermal Properties of Beeswax Incorporating ZnO, CuO and Soot Particles

Abstract: Phase change materials that have low thermal conductivity take a longer time to store and to discharge the stored thermal energy. The thermal conductivity of phase change materials can be enhanced using different additives. Beeswax is a phase change material with a high thermal capacity and low thermal conductivity. Therefore, the thermal conductivity, melting temperature, latent heat, and heat capacity of beeswax incorporating ZnO, CuO and soot particles with the 0.0, 0.064, 0.326, 1.304, and 3.260 g in the 20 g beeswax have been studied. The thermal conductivity measurement shows that the incorporation of ZnO, CuO and Sootparticles improved the thermal conductivities of the beeswax, i.e., from 0.2502W/mK to 2.89W/mK. Moreover, the differential scanning calorimetry measurements revealed that the melting temperature, latent heat, and heat capacity of the beeswax are decreased because of the incorporation of ZnO, CuO and Soot particles. Therefore, it is possible to tune the thermal properties of the beeswax incorporating metal oxide, soot particles to use beeswax-metal oxide/soot composite as a phase change materials.

Effect of moisture on physical properties of dekoko

Abstract: Dekoko is a cool season legume plant grown in northern Africa. It is a rich source of protein for people in the region. The effect of moisture on some of the physical properties of dekoko seed was studied because it frequently affects some important parameters for the design of mechanical unit operations. The moisture content of dekoko seed was determined according to ASAE standards S352.3 and all other physical properties following standard procedure described elsewhere. The length, width, thickness, geometric mean diameter, thousand seed mass, porosity, true density and angle of repose increased from 5.60 to 6.51 mm, 4.99 to 5.78 mm, 4.60 to 5.44 mm, 5.05 to 5.89 mm, 94.08 to 126.10 g, 39.36 to 48.14%, 1361.66 to 1470.77 kg/m 3 and 29.89 ° to 37.84 ° respectively. The sphericity increased from 90.05% to 91.14% with increase in moisture content from 10.28% to 19.67% and decreased from 90.83% to 90.55% with further increase of moisture content from 24.42% to 28.61%. Whereas, bulk density decreased from 829.89 kg/m 3 at 10.28% to 762.75 kg/m 3 at 28.61% moisture content. In the same moisture range, the lowest value of static coefficient of friction recorded when dekoko seed slide against mild steel (0.35 to 0.48,) and the highest value of static coefficient of friction noticed when dekoko seed slide against plywood (0.42 to 0.54). The static coefficient of friction of for galvanized iron increased from (0.37 to 0.51) as moisture increased from 10.28% to 28.61%. Generally, moisture content directly or indirectly affected the physical properties of dekoko seeds. Keywords: dekoko seed, moisture content, static coefficient of friction, true density, angle of repose

A Critical Discourse Analysis of Reports on “Bring Back our Girls” Campaign in Nigerian Newspapers

Abstract: This paper analyses news reports of “Bring Back Our Girls” campaign in Nigerian newspapers. The “Bring Back Our Girls” advocacy group was formed to pressure the Nigerian government to intensify efforts to rescue the over two hundred school girls abducted by Boko Haram insurgents at Chibok, Borno State, north east Nigeria. The abduction which took place in April 2014 and the subsequent campaign to release the girls received global media attention including many newspapers in the country. The study therefore analyses the schematic directions, discursive strategies and context of the discourse reports of “Bring Back Our Girls” campaigns in Nigerian newspapers using critical discourse analysis. The corpus was purposively selected from three nationally circulating newspapers: Leadership, New Telegraph and Daily Trust published from1st May to 31st July, 2014. Descriptive design was adopted using Fairclough (1995) model of critical discourse analysis. Findings show that narration and criticism constitute the dominant schematic directions of newspaper reports of the campaign; on the discursive strategy, it is found out that rationalization, narrativisation and argumentation account for 80% of the discourse and the context revealed that there is negative use of language because the campaigners and the then government of the day were loggerheads over the issue. The study concludes that due to high prevalence of criticism and rationalization in the corpus, the discourse the text of newspaper report of Bring Back Our Girls campaign largely reflected the narrative and argument of the group against the government which has responsibility to protect and rescue the abducted girls.

Cloud Management Architecture for Private Clouds

Abstract: Operation management for a private cloud infrastructure faces many challenges including efficient resource allocation, load-balancing, and quick response to real-time work- load changes. Traditional manual IT operation management is inadequate for this highly dynamic and complex environment. This work presents a distributed service architecture that is designed to provide an automated, shared, off-site operation management service for private clouds. The service architecture incorporates important concepts such as: Metric Templates for minimizing the network overhead for transmission of cloud metrics; a Cloud Snapshot that provides a global view of the current status of the cloud, supporting optimal decision making; and a Calendar-based Data Storage Model to reduce the storage required for cloud metric data and increase analysis performance. A proactive response to cloud events is generated based on statistical analysis of historical metrics and predicted usage. The architecture, functional components and operation management strategies are described. A prototype implementation of the proposed architecture was deployed as a service on the OpenStack. The effectiveness and usability of the proposed proactive operation management solution has been comprehensively evaluated using a simulated private cloud with dynamic workloads.

Family-Related Determinants and Implications of Low Female Enrolment in Electrical Trade in Adamawa State

Abstract: Purpose: This study examined the perceived family-related determinants and implications of the low enrolment of female students in electrical installation and maintenance works in government science technical colleges of Adamawa State. Approach/Methodology/Design: A descriptive survey research design was adopted for the study. The population of the study consisted of 13 Electrical Installation and Maintenance Work Trade (EIMWT) teachers and 129 parents of National Technical Certificate Two (NTCII) EIMWT students (either father or mother) in three Government Science Technical Colleges of Adamawa State. The sample of the study comprised of the entire population, thus no sampling was done. A 20-item questionnaire was developed by the researcher and used for data collection. The questionnaire was validated by three lecturers from the Department of Electrical Technology Education, Modibbo Adama University, Yola, Adamawa State. A reliability coefficient of 0.87 was obtained for the instrument using Cronbach Alpha. Mean was used to answer the research questions while a t-test was used to test the hypotheses. Findings: The findings of the study revealed low contribution from the female gender to family income in households and increased level of dependency of the female gender on the males in Adamawa State as major perceived family-related implications. Practical Implications: The study presents practical implications for concerned authorities to work on dismantling the negative perceptions about female education. The results suggest working closely with several institutions to raise awareness and enlighten parents and family members on the prospects of EIMWT, especially to the female gender. Originality/value: The study concludes that EIMWT is a way of investing in the education of females in view of breaking cycles of poverty and social vices that the females might be lured into.