All Outputs (653)

Analysis of Call Setup Success Rate (CSSR) in a well established cellular network (2013)
Journal Article

All GSM operators use key performance indicators (KPIs) to determine their network performance in different cells and evaluate the quality of service (QoS) regarding end users perspective. The Call Setup Success Rate (CSSR) is one of the most importa... Read More about Analysis of Call Setup Success Rate (CSSR) in a well established cellular network.

Performance evaluation of well-established cellular network using drop call probability analysis (2013)
Journal Article

There are various performance determinant applied to cellular networks. One of the most important of these is the drop call probability. With the rapid increase of GSM users in Nigeria, it becomes imperative that Network operators pay close attention... Read More about Performance evaluation of well-established cellular network using drop call probability analysis.

A surface roughness and power consumption analysis when slot milling austenitic stainless steel in a dry cutting environment (2013)
Presentation / Conference Contribution

Engineered components must satisfy the surface texture requirements and traditionally surface roughness (arithmetic average, Ra) has been used as one of the principles methods to assess quality. Surface roughness is a result of the cutting parameters... Read More about A surface roughness and power consumption analysis when slot milling austenitic stainless steel in a dry cutting environment.

Multiobjective optimization for improved management of flood risk (2013)
Journal Article

Effective flood risk management requires consideration of a range of different mitigation measures. Depending on the location, these could include structural or nonstructural measures as well as maintenance regimes for existing levee systems. Risk an... Read More about Multiobjective optimization for improved management of flood risk.

Optimal design of three-phase distribution transformer using fewer constraints (2013)
Journal Article

This paper presents an optimization process where fewer constraints are used in the design of a three phase distribution transformer. The constraints were applied on two optimization techniques-the Geometric Programming (GP) and the Genetic Algorithm... Read More about Optimal design of three-phase distribution transformer using fewer constraints.

A procedure to measure biaxial near yield residual stresses using the deep hole drilling technique (2013)
Journal Article

Deep Hole Drilling (DHD) is a mechanical strain relief technique used to measure residual stresses within engineering components. Such techniques measure strains or displacements when part of the component is machined away and typically assume elasti... Read More about A procedure to measure biaxial near yield residual stresses using the deep hole drilling technique.

Fatigue life of repaired welded tubular joints (2013)
Journal Article

In this study, the effect of repair on fatigue life of tubular joints is investigated. Six cracked specimens precedently subjected to fatigue loading undergone to weld repair. Two of those specimens were shot peened before primary fatigue loading. I... Read More about Fatigue life of repaired welded tubular joints.

Control of PEM fuel cell system via higher order sliding mode control (2012)
Journal Article

This paper presents a multi-input multi-output (MIMO) dynamic model of polymer electrolyte membrane (PEM) fuel cells. A non-linear controller is designed to prolong the stack life of the PEM fuel cell. A moderate deviation between hydrogen and oxygen... Read More about Control of PEM fuel cell system via higher order sliding mode control.

Novel bio-inspired approach for fault-tolerant VLSI systems (2012)
Journal Article

Living organisms are complex systems, and yet they possess extremely high degrees of reliability. Since failures are local, their repair will often be taken on the local (cell) level. Engineers have long sought systems that could offer similar reliab... Read More about Novel bio-inspired approach for fault-tolerant VLSI systems.

Multi-objective optimal design of a three phase induction motor using geometric programming (2012)
Journal Article

This paper presents the use of Geometric Programming optimisation in the optimal design of a three phase induction motor. In order to get the best result we used multi-objective functions with the same constraints. Comparison is made between the inde... Read More about Multi-objective optimal design of a three phase induction motor using geometric programming.

Path loss measurement and model analysis of 1.8GHz wireless network in Benin City, Nigeria (2012)
Journal Article

The frequencies of GSM service in Nigeria are 900 and 1800 MHZ and like all radio frequencies they are susceptible to path loss. In this work, field strength data was collected in Benin City, Nigeria and was used to calculate the path loss suffered b... Read More about Path loss measurement and model analysis of 1.8GHz wireless network in Benin City, Nigeria.

Prolong the stack life of PEM fuel cell system via higher order sliding mode control (2012)
Presentation / Conference Contribution

Fuel cells are electrochemical generators where produce electrical energy from chemical reactants. It is why these are good candidates to provide clean energy generation. This paper presents a multi-input multi-output (MIMO) dynamic model of polymer... Read More about Prolong the stack life of PEM fuel cell system via higher order sliding mode control.

An automated method for costing flood risk mitigation measures for use with flood risk management decision support systems (2012)
Presentation / Conference Contribution

An initial study of the effect of using liquid nitrogen coolant on the surface roughness of inconel 718 nickel-based alloy in CNC milling (2012)
Presentation / Conference Contribution

The most used alloy of nickel, Inconel 718 is known to difficult to machine owing to its superior material and physical properties. This paper presents one of the very first studies on cryogenic CNC end milling of the Inconel 718 nickel based alloy u... Read More about An initial study of the effect of using liquid nitrogen coolant on the surface roughness of inconel 718 nickel-based alloy in CNC milling.

Change risk assessment for Scotland (2012)
Report

The UK Climate Change Risk Assessment (CCRA) for Scotland was one of three devolved administration reports produced by the UK Government as part of the first ever UK Climate Change Risk Assessment (CCRA1).
This report identified specific threats as... Read More about Change risk assessment for Scotland.

The UK’s first climate change risk assessment and the implications for the coast (2012)
Presentation / Conference Contribution

In 2008 the Climate Change Act was passed into law in the UK. This provides a legally binding framework for reducing carbon emissions. Much of the focus of the Act is on reducing emissions and hence on mitigation measures, however, the Act also req... Read More about The UK’s first climate change risk assessment and the implications for the coast.

Free space optical communications (2012)
Presentation / Conference Contribution

Free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to transmit data for telecommunications or computer networking. "Free space" means air, outer space, vacuum, or something similar.... Read More about Free space optical communications.

Analysis of drop call probability in well established cellular networks in Asaba, Delta State, Nigeria (2012)
Journal Article

Technology in Africa has increased over the past decade. The increase in modern cellular networks requires stringent quality of service (QoS). Drop call probability is one of the most important indices of QoS evaluation in a large scale well-establis... Read More about Analysis of drop call probability in well established cellular networks in Asaba, Delta State, Nigeria.

UK climate change risk assessment: Government report 2012 (2012)
Report

Climate change risk assessment for the health sector (2012)
Report

The UK Climate Change Risk Assessment (CCRA) for the Health Sector was one of 12 sector reports published by the Government on 25 January 2012. It was part of the first ever UK Climate Change Risk Assessment (CCRA1), with the key results of this repo... Read More about Climate change risk assessment for the health sector.