All Outputs (672)

Assessing the joint probability of sea conditions: A robust approach (2018)
Presentation / Conference Contribution

The design of breakwaters and other coastal structures around the UK requires the assessment of the joint probability of extreme waves and sea levels. There is a standard simplified approach applied within the UK that uses joint exceedance contours o... Read More about Assessing the joint probability of sea conditions: A robust approach.

Time-dependent creep analysis and life assessment of 304 L austenitic stainless steel thick pressurized truncated conical shells (2018)
Journal Article

This paper presents a semi-analytical solution for the creep analysis and life assessment of 304L austenitic stainless steel thick truncated conical shells using multilayered method based on the first order shear deformation theory (FSDT). The cone i... Read More about Time-dependent creep analysis and life assessment of 304 L austenitic stainless steel thick pressurized truncated conical shells.

Failure analysis of bolt connections in fired heater of a petrochemical unit (2018)
Journal Article

The main function of a fired heater in a petrochemical site is to produce supersaturated steam. Due to extremely difficult working conditions and high temperatures, there is a very high probability of failures in different parts of a fired heater. In... Read More about Failure analysis of bolt connections in fired heater of a petrochemical unit.

Robust control design for air breathing proton exchange membrane fuel cell system via variable gain second-order sliding mode (2018)
Journal Article

The nonlinear and time-dependent characteristic and unknown modeling uncertainty of proton exchange membrane fuel cell (PEMFC) such as complex electro-chemical, thermal, and fluid mechanic phenomena make its controller design quite challenging. In th... Read More about Robust control design for air breathing proton exchange membrane fuel cell system via variable gain second-order sliding mode.

Application of three nodded finite eleme (2018)
Journal Article

The convergence of numerical solution based on two nodded beam finite element require considerable number of
iterations and time; and is also plagued with shear locking. To address these deficiencies a three nodded beam element is
proposed in thi... Read More about Application of three nodded finite eleme.

Impacts sociaux et environnementaux dans la gestion des routes: Cas de l'Afrique subsaharienne (2018)
Presentation / Conference Contribution

Analysis of competencies for effective virtual team leadership in building successful organisations (2018)
Journal Article

Purpose: Global competition and advances in technology have enhanced the growing trend of virtual teams in order to execute business strategies. Thus, understanding the competencies needed for virtual leadership effectiveness is essential and vital t... Read More about Analysis of competencies for effective virtual team leadership in building successful organisations.

Thermomechanical creep analysis of FGM thick cylindrical pressure vessels with variable thickness (2018)
Journal Article

In the present study, a theoretical solution for thermomechanical creep analysis of functionally graded (FG) thick cylindrical pressure vessel with variable thickness based on the first-order shear deformation theory (FSDT) and multilayer method (MLM... Read More about Thermomechanical creep analysis of FGM thick cylindrical pressure vessels with variable thickness.

Effect of initial surface treatment on shot peening residual stress field: Analytical approach with experimental verification (2018)
Journal Article

Shot peening is the most common surface treatment employed to enhance the fatigue performance of structural metallic materials and often carried out after other surface treatments. This paper mainly focuses on the effects of initial conditions of sur... Read More about Effect of initial surface treatment on shot peening residual stress field: Analytical approach with experimental verification.

Performance of irrigated maize in a crude-oil polluted soil remediated by three nutrients in Nigeria's Niger Delta (2017)
Journal Article

An in-situ simulated crude-oil polluted soil was remediated for 8 weeks by three different nutrients, and then used to plant maize (Farz 26) with a growth period of 14 weeks, with an irrigation depth of 4mm/day. Remediation consisted of the applicati... Read More about Performance of irrigated maize in a crude-oil polluted soil remediated by three nutrients in Nigeria's Niger Delta.

Generation of a train of ultrashort pulses through the propagation of periodic wave in photonic crystal fibres (2017)
Thesis

This thesis presents a study of nonlinear optical phenomena of ultrashort pulse dynamics in photonic crystal fibre (PCF), using analytical and numerical analyses. For complete description of this process, we consider the technique of pulse compressio... Read More about Generation of a train of ultrashort pulses through the propagation of periodic wave in photonic crystal fibres.

Generation of a train of ultrashort pulses (USP) (2017)
Presentation / Conference Contribution

Increase in the demand for fast-speed communication for several engineering applications.

Design Output Control TLB Converter for DC Drive Applications with photovoltaic power supply (2017)
Journal Article

Using conventional boost converter in photovoltaic system as the interface between the photovoltaic panel and the consumer is widely practiced. In this paper, instead of using conventional boost converter, the three-level boost converter (TLBC) has b... Read More about Design Output Control TLB Converter for DC Drive Applications with photovoltaic power supply.

Time-dependent hygro-thermal creep analysis of pressurized FGM rotating thick cylindrical shells subjected to uniform magnetic field (2017)
Journal Article

Time-dependent creep analysis is presented for the calculation of stresses and displacements of axisymmetric thick-walled cylindrical pressure vessels made of functionally graded material (FGM). For the purpose of time-dependent stress analysis in an... Read More about Time-dependent hygro-thermal creep analysis of pressurized FGM rotating thick cylindrical shells subjected to uniform magnetic field.

Time-dependent thermomechanical creep behavior of FGM thick hollow cylindrical shells under non-uniform internal pressure (2017)
Journal Article

In this paper, a theoretical solution for time-dependent thermo-elastic creep analysis of a functionally graded (FG) thick-walled cylinder based on the first-order shear deformation theory is presented. The cylinder is subjected to the non-uniform in... Read More about Time-dependent thermomechanical creep behavior of FGM thick hollow cylindrical shells under non-uniform internal pressure.

Determination of mechanical properties using sharp macro-indentation method and genetic algorithm (2017)
Journal Article

To determine mechanical properties, instrumented indentation is a non-destructive one where traditional methods (such as tensile test) are not accessible. However, there are several serious challenges when trying to correctly use this technique.

H... Read More about Determination of mechanical properties using sharp macro-indentation method and genetic algorithm.

Design of second order sliding mode and sliding mode algorithms: A practical insight to DC-DC buck converter (2017)
Journal Article

This paper presents a simple and systematic approach to design second order sliding mode controller for buck converters. The second order sliding mode control U+0028 SOSMC U+0029 based on twisting algorithm has been implemented to control buck switch... Read More about Design of second order sliding mode and sliding mode algorithms: A practical insight to DC-DC buck converter.

Effet du vieillissement des chaussées sur le bruit routier (2017)
Journal Article

Generation of a train of ultrashort pulses (USP) through the propagation of periodic wave in a photonic crystal fibers (pcf) (2017)
Presentation / Conference Contribution

The aim of this work is to generate a train of USP with high-repetition-rate.

Twisting control algorithm for the yaw and pitch tracking of a twin rotor UAV (2017)
Journal Article

In this paper, second order sliding mode controller is used to compensate the pitch and yaw angles of multivariable (MIMO) twin rotor system. Twin rotor has six state variables including yaw and pitch angles, yaw and pitch angular velocities, and arm... Read More about Twisting control algorithm for the yaw and pitch tracking of a twin rotor UAV.