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Welcome to EUSpace, The Institutional Repository of Elizade University. A collection of theses, articles,books, videos, images, lectures, papers, data sets, and all types of digital content originating from Elizade University, Nigeria. This repository is managed by the University Library
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Rainfall trends in Nigeria, 1901–2000
(Elsevier (Journal of Hydrology), 2011-12-09) Oguntunde, Philip G.; Abiodun, Babatunde J.; Lischeid, Gunnar
There is the need to evaluate changes in the spatial and temporal patterns of rainfall in order to improve water management strategies of a given region. In this study, standard tests are used to examine the existence of trend in annual and monthly rainfall of Nigeria over the last century. Rainfall variability index was estimated as standardized rainfall departure while autocorrelation spectral analysis is used to obtain the periodicities inherent therein. Rainfall spatial distribution was highly latitudinal dependent (r2 > 0.90) and had no clearly linear relations with the longitude. Rainfall variability index showed that 1950s was the wettest decade (+0.84) while 1980s was the driest (−1.19), with the two decades between 1970 and 1990 being drier than any other comparable period in the last century. Observed rainfall changes varied between −3.46 and +0.76 mm yr−2. About 90% of the entire landscape exhibited negative trends but only 22% showed significant changes at 5% level. There was a sharp difference between changes in rainfalls in 1931–1960 and 1961–1990 periods. Annual precipitation reduced by 7% between the two periods. While more than 90% of the landscape showed no significant rainfall change in the first period, about 57% of Nigeria showed a significant (P < 0.05) decrease in the second. The dominant peaks can be classified into four distinct rainfall cycles with periods 2–3, 5–7, 10–15 and 30 yr. These cycles may be associated with the stratospheric Quasi-Biennial Oscillation (QBO), the El-Nino Southern Oscillation (ENSO); the sunspot cycles and the Atlantic Multi-Decadal Oscillation (AMO) sea surface temperature, respectively.
Effects of charcoal production on maize yield, chemical properties and texture of soil
(Biology and Fertility of soils (Springer-Verlag), 2004-03) Oguntunde, Philip G.; Fosu, Matthias; Ajayi, Ayodele E.; Van de Giesen, Nick
The effects of charcoal production on soil textural and chemical properties were investigated in Ejura, Ghana. The aim was to study the effects of heating and charcoal residue on maize yield, soil texture and soil chemical properties. Composite samples were taken from the 0–10 cm layer of soil at charcoal-making sites and from adjacent fields (control). Twelve sites were randomly selected for the study across the range of the Kotokosu watershed. Maize was planted in four selected locations on charcoal site soils (CSS) and adjacent field soils (AFS) to assess the impact of charcoal production on crop yield. There was a significant increase in soil pH, base saturation, electrical conductivity, exchangeable Ca, Mg, K, Na and available P in the soil at the kiln sites as compared to the adjacent soils. A relative change of up to 329% was observed in K while organic C and total N decreased by 9.8% and 12.8%, respectively. Organic C and total N were highly correlated ( P <0.01) and both parameters significantly ( P <0.05) depended on clay minerals in the soils. Soil texture was also modified with a significantly higher sand content and lower clay fraction in the CSS. The grain and biomass yield of maize increased by 91% and 44%, respectively, on CSS as compared to AFS. Further research to ascertain the longterm effects of charcoal production on the soil environment and the fertility of tropical soils is needed.
Keywords Charcoal production · Soil heating · Soil fertility · Maize yield · Ghana
ICT Literacy Skills as Correlate of Information Utilisation Among Undergraduate Students of University of Lagos, Lagos State, Nigeria.
(Journal of New Media and Mass Communication, 2018) Yusuf, Felicia; Owolabi, Sola; Idowu, O.; Aregbesola, Ayooluwa
The study surveyed ICT literacy skills as correlate of information utilization among undergraduate students of University of Lagos, Nigeria. It was found that the level of ICT literacy skills among the undergraduate students of the University of Lagos was relatively high. Majority of the students in the University of Lagos indicated that they acquired the ICT literacy skills mostly through self-study (users’ guide), formal education, by trial and error method, as well as assistance from their colleagues. There was no significant relationship between ICT literacy skills and information use by the undergraduate students. Likewise, no significant relationship existed between the acquisition of ICT literacy skills and use of information by the undergraduate students. The study recommended among others that the university should periodically organize ICT literacy programmes to improve on students’ ICT literacy skills for effective accessibility of the available ICT facilities like the internet and e-resources for productive information use. Keywords: ICTs, Information utilization, ICT literacy skills, Information use.
Analysis of Mechanical Engineering Research Activities Using Bibliometric Method: A Case Study of Undergraduate Projects
(Journal of Mechanical Engineering and Technology, 2018) Osueke, Christian O; Idiegbeyan-ose, Jerome; Eyiolorunshe, Toluwani; Aregbesola, Ayooluwa; Owolabi, Sola
This study investigated the citation pattern of Mechanical engineering students in Landmark University, Nigeria. research projects submitted from 2015 to 201 projects were examined one after the other and the different types of cited materials were recorded according to the year. It was discovered that the citations was high and multiple authored projects accounted for the that the citations on the projects increased on yearly basis. It was also revealed that journal articles accounted for the highest number of cited documents, it was also revealed that most of the cited materials ar that the students preferred to cite multiple authored materials, it was also discovered that the degree of collaboration by the students varies. Based on this research, the paper concluded that researchers should research so as to improve the research output of the undergraduate projects.
Digital Library and Distance Learning in Developing Countries: Benefits and Challenges
(IGI Global, 2019) Idiegbeyan-ose, Jerome; Owolabi, Sola Emmanuel; Aregbesola, Ayooluwa; Foluke, Okocha; Toluwani, Eyiolorunshe; Sunday, Oguntayo
This chapter discussed the digital library and distance learning benefits and challenges in developing countries. It started with the general introduction of digital library and distance learning, and went further and discussed the nexus between the digital library and distance learning. The chapter further highlighted the benefits of digital library in distance learning. It also pointed out the challenges of distance learning in developing countries, such as finance, lack of conducive learning environment, poor policies on education, inadequate instructional materials, among others. The chapter further discussed the challenges of digital library in developing countries to include insufficient funding, high cost of instructional materials, insufficient and digital local content, and so on. The paper concluded that there is an urgent need for all stakeholders to take urgent attention in addressing the challenges of digital library in distance learning to create a full opportunity of what digital library provides in distance learning in developing countries.