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Browsing Sustainable Research and Innovation Proceedings by Issue Date

Browsing Sustainable Research and Innovation Proceedings by Issue Date

Now showing items 1-20 of 83

Combustion and Emission Characteristics of a Low Emission and Highly Efficient PCCI Diesel Engine

Yokobe, Sumito; Kawahara, Nobuyuki; Tomita, Eiji; Kiplimo, Robert (COETEC, 2017-04-06)

The combustion and emission characteristics of a low emission and highly efficient premixed charge compression ignition diesel engine operated with moderate amount of exhaust gas recirculation was investigated in a single ...
A Practical Approach To Combustion Process Optimization Using An Improved Immune Optimizer

Wojdan, K.; Swirski, K.; Warchol, M.; Milewski, J.; Miller, A. (COETEC, JKUAT, 2017-04-06)

An improved version of the immune inspired optimizer SILO is presented in this paper. The new model identification method allows for utilization of model gains constraints. Moreover the operation of a new Transition ...
A Practical Approach To Combustion Process Optimization Using An Improved Immune Optimizer

Miller, A.; Milewski, J.; Warchol, M.; Swirski, K.; Wojdan, K. (COETEC, 2017-04-06)

An improved version of the immune inspired optimizer SILO is presented in this paper. The new model identification method allows for utilization of model gains constraints. Moreover the operation of a new Transition State ...
An Insight into the Sources of the Bentonite used in the Local Drilling Industry

. Ikua, B. W; Maranga, S. M.; Mutisya, Peter K. (COETEC, 2017-04-06)

Bentonite is a type of clay mineral that is used in a variety of applications such as drilling, sand casting, pelletizing iron ores, in insecticides, pet-litter, pharmaceuticals and cosmetics. In this paper, the findings ...
Climate Change Mitigation through Standards and Labels

Maina, Karuga (COETEC, 2017-04-06)

The Standards and Labeling Programme in Kenya is a 5year Government of Kenya initiative being implemented under the Ministry of Industrialization. This Climate Change Mitigation Programme jointly funded by the United Nation ...
Analysis of Harmonic order levels at Power Lines to Improve the Power Quality

Ngoo, Livingstone; Nderu, J. N.; Ndungu, C.M. (COETEC, 2017-04-06)

This work aims at analysis and establishing harmonic levels at various points of KPLC power lines. It involved collection of harmonic order levels from generation, distribution and point of common coupling (PCC). The data ...
Dynamic Analysis of Multi-Body Mechanical Systems with Imperfect Kinematic Joints: A Literature Survey and Review

Ikua, Bernard; Kihiu, John; Muvengei, Onesmus (COETEC, 2017-04-06)

In traditional dynamic modeling of multi-body mechanical systems, the kinematic joints are assumed to be ideal or perfect, i.e., the clearance, friction, wear, and lubrication effects at the joints are neglected in order ...
Effect of Laser Parameters on PMMA during Laser Micromachining: A FEMLAB Simulation

Ndeda, R.; Kioni, P. N.; Keraita, J. N. (JKUAT, 2017-04-11)

Laser micromachining has been widely applied in the fabrication, production and manufacturing of Micro Electro Mechanical Systems (MEMS). It uses photo thermal melting or ablation to abricate a microstructure. The use of ...
A Laboratory Scale Investigation of Dry Coal Benefeciation in an Air Fluidized Bed: Effects of Particle Size, Shape and Density

Makokha, Augustine (JKUAT, 2017-04-11)

Coal is a fossil fuel that forms under the earth by natural processes. The Potential markets for coal include power generation, export, domestic, metallurgical, liquefaction and cement processing industries. In Kenya, coal ...
A survey of Ultrasonic Waves in Powder Transportation

Murimi, E.; Kihiu, J.; Nyakoe, G.; Mutuli, S. (JKUAT, 2017-04-11)

Ultrasound technology has become an important aspect in material handling and machining. This paper describes the application of standing and traveling ultrasonic waves in powder transportation and how their usefulness ...
Adapting Information Technology as a Contrivance to Enhance Sustainable Entrepreneurship through Handy Banking Habits

Achieng, Maureen (JKUAT, 2017-04-11)

This article reports the work done after exploring the challenges faced by both the Small and Medium Enterprises (SMEs) and the banking industry in the management of finances; especially the payment of utility bills and ...
Optimal Control Strategy of NG Piston Engine as a DG Unit Obtained by an Utilization of Artificial Neural Network

Milewski, Jaroslaw (JKUAT, 2017-04-12)

The paper presents a control strategy concept of a piston engine fueled by Natural Gas as a DG unit obtained by using an Artificial Neural Network. The control strategy is based on several factors and directs the operation ...
Fabrication of Zn4Sb3 Bulk Thermoelectric Materials Reinforced with SiC Nanosized Particles by Hot Extrusion Process

Akao, Takahiro; Uya, Kenji; Onda, Tetsuhiko; Chen, Zhong-Chun (2017-04-12)

Zinc antimonide, Zn4Sb3, has been found as a promising thermoelectric material utilized in a temperature range of 200 ~ 500˚C, in which there exist vast waste-heat resources exhausted from many factories and vehicles. ...
Factors affecting dual pump fiber optical parametric amplification gain

Rotich, E.; Waswa, D. (JKUAT, 2017-04-12)

The fiber nonlinear effects on the gain of fiber optical parametric amplifier (FOPA) are theoretically studied using MATLAB and optism. The results show that different channels interact giving varied degrees ...
Radio Frequency (RF) Safety and Esthetic Concerns

Omae, O.; Ndungu, E.; Kibet, P.; Tarus, H. (JKUAT, 2017-04-12)

Recent years has witnessed a rapid proliferation of wireless systems use in all walks of life. This proliferation has caused some concerns about safety and esthetics due to unprecedented increase of human exposure to EMF ...
Heterogeneous Basic Catalysts for Transesterification of Vegetable Oils: A Review

Kumar, A (JKUAT, 2017-04-12)

Biodiesels are biofuels made from renewable sources such as vegetable oils originating from plants and animal fats. Transesterification reaction is carried out by reacting triglycerides in oil/fat with an alcohol in presence ...
Mechanical stirring and synergistic effect of Pr3+/Pr4+ and Ce4+ in improving the low-temperature reducibility of Pr-doped ceria nanoparticles

Mutinda, Samuel; Wang, Ruigang (JKUAT, 2017-04-12)

We report that shape/size-controlled high surface area CeO2 and Pr-doped CeO2 solid solution nanoparticles were synthesized using a facile hydrothermal method. The effect of mechanical stirring during the initial stage of ...
Developments in Silicon Wafer Micromachining

Mulembo, T.; Ikua, B.; Keraita, J.; Niyibizi, A.; Wangui, E. (JKUAT, 2017-05-24)

Most electronic components are based on monocrystalline silicon, with only a small percentage of them made of polycrystalline and amorphous silicon. Micromechanical components such as acceleration sensors in car safety ...
An Evaluation of Maintenance Practices in Kenya: Some preliminary results

Muchiri, A.K.; Ikua, B.W.; Nyakoe G. N; Kabini S. K; Makenzi M. M (JKUAT, 2017-05-24)

Over time, the definition of maintenance has evolved from activities meant to keep equipment in an operable condition, to a set of activities required to keep the means of production in the desired operating conditions ...
Effect of Capacitance on Electrical Discharge Machining Using an RC type Pulse Generation Circuit

Kabini S. K.; Bojer S. K.; Ikua B. W.; Kihiu J. M.; Nyakoe G. N.; Mwangi J. W. (JKUAT, 2017-05-24)

The Electrical Discharge Machining (EDM) Process is complex in nature partly due to the mechanism of material removal, and, partly due to the presence of many machining parameters. This complexity of the EDM process has ...

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