Browsing School of Engineering and Technology by Issue Date
Now showing items 21-40 of 115
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Combined Economic and Emission Dispatch Solution Using ABC_PSO Hybrid Algorithm with Valve Point Loading Effect
(International Journal of Scientific and Research Publications, 2012)The problem of power system optimization has become a deciding factor in current power system engineering practice with emphasis on cost and emission reduction. The economic and emission dispatch problem has been addressed ... -
Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer
(Springer, 2012)Misaligned edge-to-edge dimers are the common products during the preparation of Ag nanoprism dimers using self-assembly method. However, in the self-assembly method, Ag nanoprisms are easily truncated because they are easy ... -
Modelling of an Optical Fibre Raman Amplifier
(2012)The transmission of signals in long-haul optical fibre systems requires signal amplification. Raman amplification is based on SRS and it requires a frequency shift of 13.2 THz provided by signal and pump wavelengths of ... -
Evaluation of Solar-Energy Dryer Systems on Drying Behaviour and Quality Attributes of Amaranth Grains
(Science and Engineering Publishing Company, 2012)This work aimed at evaluating the thin layer drying behaviour of amaranth grains (Amaranthus cruentus) and comparing the quality of the grains dried under solar-energy tent dryer systems and the open sun. The dryers were ... -
Effect of harvest age and thermal processing on poly-γ-glutamate folates and minerals in African cowpea leaves (Vigna unguiculata)
(Elsevier, 2012-03)Cowpea leaves (Vigna unguiculata) are highly consumed in Africa because the plant is easy to cultivate and highly disease/drought tolerant. The vegetables are harvested between 4 and 9 weeks of maturity. The objectives of ... -
Effects of Distributed Generation penetration on system power losses and voltage profiles
(International Journal of Scientific and Research Publication, 2013)In present times, the use of DG systems in large amounts in different power distribution systems has become very popular and is growing on with fast speed. Although it is considered that DG reduces losses and improves ... -
Alternative Diesel Engine Fuel from Kenyan Pishori Rice Bran
(International Journal of Engineering Science Invention, 2013)Rice bran used as biomass material was acquired from small scale rice millers in Wang’uruMwea, Kirinyaga County, Kenya. The oil was extracted from the rice bran using petroleum ether which was preferred due to its high ... -
A combined sensitivity factor based GA-IPSO approach for system loss reduction and voltage profile enhancement
(International Journal of Innovative Research in Engineering & Science, 2013)Though several algorithms for optimizing DG location and size in a network with the aim of reducing system power losses and enhancing better voltage profile have already been proposed, they still suffer from several ... -
Invasive species in east Africa: current status for informed policy decisions and management
(E. Africa: Status and policy in biological invasions, 2013)Invasive alien species are the second leading cause of biodiversity loss in the world today. A number of hypotheses have been advanced to explain the proliferation of invasive species. These hypotheses include deficiency ... -
Power Loss Reduction in the Active Distribution Network by Doubly Fed Induction Generator (DFIG) Placement and Sizing Using Ordinary Particle Swarm Optimization (PSO) and an hybrid of Genetic Algorithm (GA) and PSO (HGAPSO)
(2013)Due to the increased importance of DFIGs in optimization of real and reactive power losses and the maintenance of voltage profile, the general methods of DG placement and sizing in the existing literature cannot be ... -
Comparative analysis of on-farm timber conversion systems in Kenya
(Journal of Horticulture and Forestry, 2013)Exploitation of trees on private farms in Kenya is mainly by chain, bench and pit sawing systems, whose efficiency has not been well established. The sawing systems were evaluated for their performance using three species: ... -
A GA/IPSO based Approach for System Loss Reduction and Voltage Profile Improvement Employing Arithmetic Crossover and Mutation
(International Journal of Engineering Science and Technology, 2013)Reduction of system losses and improvement of voltage profile is one of the key aspects in power system operation. Though many methods are used to achieve this aspect, Distributed Generation (DG) has found increased usage ... -
The contribution of Framed Chainsaw System to Improvement of Sawn Timber Quality
(International Journal of Current Research, 2013)In this study, the effect of framed chain sawing system with optimized chain on timber size uniformity and surface roughness was analyzed and compared with the freehand chainsaw system and band saw as control. The surface ... -
Effects of mildly heated, slightly acidic electrolyzed water on the disinfection and physicochemical properties of sliced carrot
(Elsevier, 2013)The efficacy of mildly heated, slightly acidic electrolyzed water (mildly heated SlAEW) at 45 °C for disinfection and maintenance of sliced carrot quality was studied. Mildly heated SlAEW (23 mg/L available chlorine, pH ... -
General Circulation Models (GCMs) Downscaling Techniques and Uncertainty Modeling for Climate Change Impact Assessment
(Proceedings of 2013 Mechanical Engineering Conference on Sustainable Research and Innovation, 2013)Scientific literature on the assessment and projection of climate change impacts suggests that the rapidly changing climate conditions are causing far-reaching consequences on natural resources and agricultural production. ... -
Short Term Load Forecasting Using Artificial Neural Networks
(Proceedings of 2013 Mechanical Engineering Conference on Sustainable Research and Innovation, 2013)Load forecasting refers to the prediction of future load conditions based on present or historical data. This is important especially for transmission planning and economic dispatch. In this paper, an Artificial Neural ... -
Comparison of PMF and LEAF as Optical Fibre Stress and Temperature Sensing Elements
(2013)We experimentally investigate the sensitivity of PMF and LEAF fibre. The design of a stress sensor gave the best sensitivity of 0.051 kg -1 while that of a temperature sensor, gave the best sensitivity of 0.181 0C1 -
Properties of Prosopis juliflora and its potential uses in ASAL areas of Kenya
(2013)A study was done to determine the potential for processing and using prosopis juliflora for commercial purpose. The effects of the plant on the soil were evaluated as a measure of determining its influence on the environment. ... -
Performance Characteristics of Blended Rice Bran Biodiesel In aDiesel Engine
(2013)Rice bran is a by-product of the rice milling process and contains 10–25% oil depending on rice variety, milling procedure, and other agro-climatic factors. To supplement the dwindling fossil ... -
An experimental prototype for low head small hydro power generation using hydram
(2013)The global rise in energy demand has resulted to the over exploitation of both renewable and non renewable energy sources. Most feasible hydroelectric power (HEP) plants sites have been exploited and the current ...