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    Doped Metal Oxide Thin Films for Enhanced Solar Energy Applications
    (Springer, 2021) Eze, C. N.; Obodoa, R. M; Ezugwu, S. C; Ezemaa, F .I.
    Solar energy is energy from the sun and its provision is in abundance without payments. It is renewable and more promising than its counterpart energy source called fossil fuels. Fossil fuels have energy crises ranging from inadequacy to depletion, pollution etc. This solar energy could be technically collected, utilized but there could still be an improved method of collecting the solar energy for more advanced utilization called solar energy. Achieving this by the process of doping metal oxide thin films with impurities like carbon derivatives, organic synthetic dyes etc. will harnesses dopant characteristics for optimal performance. The doped materials help in controlling the composition and structure of dopants, which enhance their performance. The metal oxide semiconductor thin films are synthesized via varieties of processes on working active layer materials with stable interfaces for solar energy conversion and versatile applications in several areas valuable for humankind.
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    Assessment of technical and resource-use efficiency of yam production in Ukum Local Government Area of Benue State, Nigeria.
    (Journal of Agriculture and Rural Development, 2015) Ojo, A. O., Eneji, S. O., Ojo, M. O., Adebayo, C. O., and Ogaji, A.
    This study analyzed the technical and resource-use efficiency of yam production in Ukum Local Government Area of Benue State using Stochastic Frontier Model. Primary data were collected for one year period using structured questionnaire. The result of the summary statistics revealed an average farm size of 3.28 ha/ farmer which was an indication that they were small-scale farmers. The maximum likelihood estimates showed that planting materials, herbicides, capital inputs and fertilizers were the major determinants of the technical efficiency of the farmers in the area. The estimated coefficient of the inefficiency function revealed that sex, level of involvement in farming, membership of cooperative, extension contact and fertilizer usage reduced the technical inefficiency of the farmers. The technical efficiency indices revealed that none of the farmers operated at maximum efficiency frontier level with a mean technical efficiency of 0.638, which implied that the farmers were able to obtain about 64% of yam output from a given mix of production inputs. The result of the resource-use efficiency showed that the farmers were inefficient in the use of their resources. Based on the results, it is therefore recommended that government should organize training programmes to educate the farmers on the technical knowhow of yam production so as to improve their technical efficiency frontier level. In addition, extension agents should be engaged in training the farmers on how they can optimized the use of resources to increase their efficiency level and reduce input wastage.