All Outputs (654)

Robust feedback linearization control of air-feed system in PEM fuel cell against practical uncertainty (2016)
Journal Article

In this paper robust feedback linearization control approach based on the gap metric analysis is proposed to control a Proton Exchange Membrane Fuel Cell (PEMFC). The oxygen excess ratio ( ) is regulated through adjustment of the air supply to avoid... Read More about Robust feedback linearization control of air-feed system in PEM fuel cell against practical uncertainty.

Preliminary numerical simulations to investigate the kinematics of infant head impact (2016)
Presentation / Conference Contribution

Presented is the development of a simulation that allows for preliminary investigation of impact to a 10 day old infant head. A computer-aided drafting (CAD) model is reconstructed from high resolution computerised tomography (CT) scan images and mes... Read More about Preliminary numerical simulations to investigate the kinematics of infant head impact.

Chattering analysis of second order sliding mode algorithms for linear plants with disturbance (2016)
Presentation / Conference Contribution

An analysis of second-order sliding-mode algorithms, specially of super-twisting and twisting as a filter algorithm is performed in frequency domain with the use of the describing function method, and is shown that periodic motion happens and the par... Read More about Chattering analysis of second order sliding mode algorithms for linear plants with disturbance.

Ductile to brittle failure transition of HSLA-100 steel at high strain rates and subzero temperatures (2016)
Journal Article

Mechanical properties of HSLA-100 steel at room and subzero temperatures of −40 °C, −80 °C and −196 °C were investigated in this work. Dry ice and liquid nitrogen were used to reach the low temperatures. Also, the material response to different strai... Read More about Ductile to brittle failure transition of HSLA-100 steel at high strain rates and subzero temperatures.

Experimental measurement and analytical determination of shot peening residual stresses considering friction and real unloading behavior (2016)
Journal Article

This paper presents an analytical model to predict the residual stress distribution induced by Shot peening. The analytical approach is based on the work of Shen and Atluri (2006) [18] with some modifications. The modifications are related to the ela... Read More about Experimental measurement and analytical determination of shot peening residual stresses considering friction and real unloading behavior.

Power budget analysis of fiber optics communication links along Benin-Asaba route (2016)
Journal Article

With the development of optical fiber communication system most telecommunication companies now prefer to use optical fiber transmission medium for higher information bandwidth. The design of such a system involves many aspects such as the type of so... Read More about Power budget analysis of fiber optics communication links along Benin-Asaba route.

Time-dependent thermo-elastic creep analysis of thick-walled spherical pressure vessels made of functionally graded materials (2015)
Journal Article

Assuming that the thermo-elastic creep response of the material is governed by Norton's law and material properties, except Poisson's ratio, are considered as a function of the radius of the spherical vessel, an analytical solution is presented for c... Read More about Time-dependent thermo-elastic creep analysis of thick-walled spherical pressure vessels made of functionally graded materials.

Fuzzy PID control of a stand-alone system based on PEM fuel cell (2015)
Journal Article

Fuel cell (FC) systems are appropriate candidates as alternative energy sources for use in stand-alone applications. However, the FC generates an unregulated voltage, which is not suitable in stand-alone application usage solely. This paper presents... Read More about Fuzzy PID control of a stand-alone system based on PEM fuel cell.

A comprehensive experimental and numerical study on redistribution of residual stresses by shot peening (2015)
Journal Article

Shot peening is one of the most effective surface strengthening treatment technologies in which compressive residual stresses are induced beneath the specimen surface. Effects of various factors on the distribution of residual stress profile induced... Read More about A comprehensive experimental and numerical study on redistribution of residual stresses by shot peening.

Spherical indentation, part II: Experimental validation for measuring equibiaxial residual stresses (2015)
Journal Article

It is occasionally important or even inevitable to measure residual stresses without harming engineering components. Spherical indentation can be categorized as a nondestructive method to measure residual stresses, as it causes very little damage to... Read More about Spherical indentation, part II: Experimental validation for measuring equibiaxial residual stresses.

Stress variations effect on the accuracy of slitting method for measuring residual stresses (2015)
Journal Article

To maintain the structural integrity of the engineering components, having an exact knowledge of residual stresses is important. Among all mechanical strain relief techniques to measure residual stresses, slitting is one of the youngest. This techniq... Read More about Stress variations effect on the accuracy of slitting method for measuring residual stresses.

Influence of asymmetrical cuts in measuring residual stresses using contour method (2015)
Journal Article

Experimental methods to determine residual stresses are mainly divided into destructive and non-destructive categories. Contour method is a destructive technique that offers a two dimensional map of normal component of residual stresses. The conventi... Read More about Influence of asymmetrical cuts in measuring residual stresses using contour method.

Generation of train of ultrashort pulses (USP) through the propagation of periodic wave through dispersion decreasing photonic crystal fibers (pcf) (2015)
Presentation / Conference Contribution

The aim of this work is to generate a train of USP with a high repetition rate. High-repetition-rate USPs are widely used in optical communication, optical imaging, medicine, and modern instrumentation.

Soil strength properties of some contaminated land in Rivers State, Nigeria (2015)
Presentation / Conference Contribution

This study was carried out to investigate the soil strength properties of some contaminated land in Rivers State. Soil samples were collected from three different sites in the state, namely: Idama in Akuku-Toru Local Government Area, Bodo in Gokana L... Read More about Soil strength properties of some contaminated land in Rivers State, Nigeria.

Managing project knowledge in delivering sustainable retrofitted buildings: A decision support framework (2015)
Presentation / Conference Contribution

This paper highlights the significance of knowledge management in construction activities, focusing particularly in the case of sustainable retrofitted building projects. It has been acknowledged that the industry has a poor attitude to project learn... Read More about Managing project knowledge in delivering sustainable retrofitted buildings: A decision support framework.

Novel hybrid adaptive controller for manipulation in complex perturbation environments (2015)
Journal Article

© 2015 Smith et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cred... Read More about Novel hybrid adaptive controller for manipulation in complex perturbation environments.

The use of exploratory research in addressing knowledge issues in delivering sustainable retrofitted building projects (2015)
Presentation / Conference Contribution

This paper describes a proposed strategy of exploring the role of knowledge management (KM) in delivering retrofitted building projects. This is based on an on-going PhD project whose primary objective is to develop a decision support system (DSS) fo... Read More about The use of exploratory research in addressing knowledge issues in delivering sustainable retrofitted building projects.

The use of knowledge management approach in delivering sustainable retrofitted building projects: A conceptual decision support system for key stakeholders (2015)
Presentation / Conference Contribution

The growing interest and awareness of sustainable development in the last decade has been remarkable. The construction industry has taken the centre stage in driving sustainable development through sustainable construction due to its impacts in the s... Read More about The use of knowledge management approach in delivering sustainable retrofitted building projects: A conceptual decision support system for key stakeholders.

Generation of train of ultrashort pulses (USP) through the propagation of periodic wave through dispersion decreasing pcf (2015)
Presentation / Conference Contribution

A model for the generation of train of ultrashort pulses is shown. This class of complex Ginzburg-Landau (CGL) equations with variable coefficients is solved directly by means of the theta function identities and Hirota bilinear method and exact peri... Read More about Generation of train of ultrashort pulses (USP) through the propagation of periodic wave through dispersion decreasing pcf.

Control of oxygen excess ratio in a PEM fuel cell system using high-order sliding-mode controller and observer (2015)
Journal Article

The main objective of this manuscript is to design a high-order sliding-mode observer to provide finite time estimation of unmeasurable states (x4 : oxygen mass, x5 : nitrogen mass) together with the oxygen excess ratio (ratio of the input oxygen ow... Read More about Control of oxygen excess ratio in a PEM fuel cell system using high-order sliding-mode controller and observer.