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RISS 인기검색어
- 검색키워드
- 저자 : Emetere, M.E. (검색결과 3 건)
- 무료
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Improving the Transmitting Loop Antenna : An Applied Model to Satellite Technology
Emetere Moses E,Uno E. Uno,Onyechekwa Lawrence,Sanni E. Samuel 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.8
The ab-initio Maxwell's equation was introduced using the Schrödinger equation and the Legendre polynomial. The efficiency, bandwidth and size of the transmitting loop was resolved theoretically to enhance the transmission of successive pulses of radio waves to illuminate objects. The radiation characteristics the resonant loop pattern of the loop antenna have been improved via the introduction of the ground plane. However, the perfect results have not been obtained. Further simulation of a dummy experimentation revealed the possibility of a high efficiency in the transmitting loop antenna via the introduction of angular loop displacement along a well defined axis. The results were confirmed experimentally. When the angular loop displacement is pi/2, we expect to see an improved uplink task under either bad or good weather.
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Investigations on aerosols transport over micro- and macro-scale settings of West Africa
Moses Eterigho Emetere 대한환경공학회 2017 Environmental Engineering Research Vol.22 No.1
The aerosol content dynamics in a virtual system were investigated. The outcome was extended to monitor the mean concentration diffusion of aerosols in a predefined macro and micro scale. The data set used were wind data set from the automatic weather station; satellite data set from Total Ozone Mapping Spectrometer aerosol index and multi-angle imaging spectroradiometer; ground data set from Aerosol robotic network. The maximum speed of the macro scale (West Africa) was less than 4.4 m/s. This low speed enables the pollutants to acquire maximum range of about 15 km. The heterogeneous nature of aerosols layer in the West African atmosphere creates strange transport pattern caused by multiple refractivity. It is believed that the multiple refractive concepts inhibit aerosol optical depth data retrieval. It was also discovered that the build-up of the purported strange transport pattern with time has enormous potential to influence higher degrees of climatic change in the long term. Even when the African Easterly Jet drives the aerosols layer at about 10 m/s, the interacting layers of aerosols are compelled to mitigate its speed to about 4.2 m/s (macro scale level) and boost its speed to 30 m/s on the micro scale level. Mean concentration diffusion of aerosols was higher in the micro scale than the macro scale level. The minimum aerosol content dynamics for non-decaying, logarithmic decay and exponential decay particulates dispersion is given as 4, 1.4 and 0 respectively.
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Optimization of Oil from Moringa oleifera seed using Soxhlet Extraction method
Ojewumi, M.E.,Oyekunle, D.T.,Emetere, M.E.,Olanipekun, O.O. Korea FoodHealth Convergence Association 2019 식품보건융합연구 (KJFHC) Vol.5 No.5
Extraction of oil from Moringa oleifera seed using Response Surface Methodology (RSM) was investigated. Effects of three factors namely: sample mass, particle size and extraction time on the response, Moringa oleifera a volume extracted, were determined. The Box-Behnken design of RSM was employed which resulted in 15 experimental runs. Extraction was carried out in a 250 ml Soxhlet extractor with Hexane and Ethanol as solvent. The Moringa oleifera seed powder was packed inside a muslin cloth placed in a thimble of the Soxhlet extractor. The extraction was carried out at 60℃ using thermostatic heating mantle. The solvent in the extracted oil was evaporated and the resulting oil further dried to constant weight in the oven. This study demonstrates that Moringa oleifera oil can be extracted from its seed using ethanol and acetone as extraction solvent. The optimum process variables for both solvent (ethanol and acetone) was determined at sample weight of 40 g, particle size of 325 ㎛ and extraction time of 8 hours. It can be deduced that using acetone as solvent produces a higher yield of oil at the same optimum variable conditions compared to when ethanol was used.
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