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Article
Publication date: 1 August 2016

David O. Obada, David Dodoo-Arhin, Muhammad Dauda, Fatai O. Anafi, Abdulkarim S. Ahmed, Olusegun A. Ajayi and Ibraheem A. Samotu

This work aims to analyze the effect of mechanical activation on structural disordering (amorphization) in an alumina-silica ceramics system and formation of mullite most…

Abstract

Purpose

This work aims to analyze the effect of mechanical activation on structural disordering (amorphization) in an alumina-silica ceramics system and formation of mullite most notably at a lower temperature using X-ray diffraction (XRD). Also, an objective of this work is to focus on a low-temperature fabrication route for the production of mullite powders.

Design/methodology/approach

A batch composition of kaolin, alumina and silica was manually pre-milled and then mechanically activated in a ball mill for 30 and 60 min. The activated samples were sintered at 1,150°C for a soaking period of 2 h. Mullite formation was characterized by XRD and scanning electron microscopy (SEM).

Findings

It was determined that the mechanical activation increased the quantity of the mullite phase. SEM results revealed that short milling times only helped in mixing of the precursor powders and caused partial agglomeration, while longer milling times, however, resulted in greater agglomeration.

Originality/value

It is noted that, a manual pre-milling of approximately 20 min and a ball milling approach of 60 min milling time can be suggested as the optimum milling time for the temperature decrease succeeded for the production of mullite from the specific stoichiometric batch formed.

Details

World Journal of Engineering, vol. 13 no. 4
Type: Research Article
ISSN: 1708-5284

Keywords

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Article
Publication date: 5 December 2016

David O. Obada, Muhammad Dauda, Fatai O. Anafi, Abdulkarim S. Ahmed and Olusegun A. Ajayi

A structural and textural characterization study has been performed to investigate the adherence of zeolite-based catalyst washcoated onto honey-comb-type cordierite…

Abstract

Purpose

A structural and textural characterization study has been performed to investigate the adherence of zeolite-based catalyst washcoated onto honey-comb-type cordierite monoliths. The supports were characterized by the scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) techniques.

Design/methodology/approach

SEM/EDS provided quantitative estimate of the washcoated monolith as the elemental composition of catalyst coating. The XRD pattern deduced that the zeolite-based catalysts were successfully mounted on the cordierite support, showing the characteristic peaks of zeolites (Zeolite Socony Mobil–5; ZSM-5) at Braggs angles of 7.88°, 8.76°, 23.04°, 23.88° and 24.36°, whereas the characteristic peak of cordierite is seen at a Braggs angle of 10.44°.

Findings

The BET results proved that a monolayer of zeolite may serve the need for surface area and porosity. This was evident in the increase of surface area of washcoated support as against the bare support. The obtained isotherms were of Type IV, illustrating the presence of mesopores. The adsorption and desorption isotherm branches coincided over the interval 0 < P/P0 < 0.50 and 0 < P/P0 < 0.45, showing N2 reversible adsorption for the two samples, respectively.

Originality/value

It was concluded that the composite materials which are ZSM-5 (Si/Al = 25) and precursors of the transition salts of copper, zinc and ceria powders were deposited on the catalyst supports, establishing the success of the coating procedure relative to the adherence of the catalyst compositions on the ceramic support.

Details

World Journal of Engineering, vol. 13 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

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Article
Publication date: 18 June 2018

Chioma Oluwaseun Abere, Olusegun Adebayo Ogunba and Terzungwe Timothy Dugeri

Studies on the maturity status of Sub-Saharan African property markets are scanty. The absence of such studies appear to have made African property markets – such as the…

Abstract

Purpose

Studies on the maturity status of Sub-Saharan African property markets are scanty. The absence of such studies appear to have made African property markets – such as the Nigerian market – unattractive to foreign investors who require market information to assess the viability of proposed investments. The purpose of this paper is to explore the maturity status of selected city property markets in Southwestern Nigeria (i.e. markets in the capital cities of Lagos, Ibadan and Osogbo), with a view to providing information for enhanced property investment in Africa.

Design/methodology/approach

The study adopted and expanded on property market maturity paradigms suggested by Keogh and D’Arcy (1994), Akinbogun et al. (2014) and Jones Lang LaSalle (2014) to measure the maturity status of the property markets in the Nigerian cities. The study investigated the maturity of three markets in Nigeria by scoring the stated views of a range of stakeholders (estate surveyors and valuers, public land administrators and financiers represented by commercial banks) across a range of ten indicators. The responses were classified by means of a five-point classification scale which expanded on the initial four-point scale developed by Dugeri (2011).

Findings

The three property markets were found to exhibit varying maturity characteristics (with weighted mean scores of 3.07, 2.71 and 2.51, respectively), representing emerging and immature stages of evolution on the maturity path. These results suggest that there is a correlation between the tier of the market and the level of property market maturity.

Practical implications

The study concluded that first- and second-tier city property markets have emerged sufficiently to the point where they may safely attract foreign direct and indirect investment from courageous foreign investors. However, the state governments and real estate professional regulatory bodies in the second and third markets need to undertake substantial remodeling of market structures to make them attractive to international investors.

Originality/value

The value of the paper is in providing much needed information for enhanced property investment in Africa.

Details

Property Management, vol. 36 no. 3
Type: Research Article
ISSN: 0263-7472

Keywords

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Article
Publication date: 4 April 2016

Oluseyi Joshua Adegoke

In the absence of continuously traded, deep and securitised markets, commercial property valuations perform a vital function in the property market by acting as a

Abstract

Purpose

In the absence of continuously traded, deep and securitised markets, commercial property valuations perform a vital function in the property market by acting as a surrogate for transaction prices. The ability of valuers to make effective estimation of value is therefore a vital issue in commercial property market. The purpose of this paper is to examine the effects of valuation variance and inaccuracy on Nigerian commercial property market.

Design/methodology/approach

Questionnaires were used in collecting data from 163 randomly selected estate surveying and valuation firms in Lagos Metropolis with a record of over 60 per cent of the total population of estate surveying and valuation firms in Nigeria. Both descriptive and inferential statistics were used to analyse the data collected.

Findings

The results revealed that valuation variance and inaccuracy causes fluctuation in the price of property, sending wrong signal to the market participants and jeopardising the future of commercial property market. It also, exposed valuers to negligence liability, loss of valuers’ credibility and reduction of valuers’ integrity.

Practical implications

The paper concluded that quality data bank system is needed to obtain accurate comparables which are the cornerstone of market valuation. Also, surveyors in the academia should revisit the techniques they have developed with a view to replacing or modifying them into a format that are easy to use by practitioners. The findings of the study will be of importance to estate surveyors and valuers, estate surveying and valuation firms, government agencies in charge of property taxes as well as investors in commercial properties.

Originality/value

The paper is one of the few attempts at examining valuation variance and accuracy in Nigeria. This paper examined the effect of valuation variance and accuracy on Nigerian commercial property market.

Details

Journal of Property Investment & Finance, vol. 34 no. 3
Type: Research Article
ISSN: 1463-578X

Keywords

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Article
Publication date: 10 July 2009

Yewande Adewunmi, Cyril Ajayi and Olusegun Ogunba

The paper examined the factors influencing the role of estate surveyors in facilities management (FM).

Abstract

Purpose

The paper examined the factors influencing the role of estate surveyors in facilities management (FM).

Design/methodology/approach

The study administered questionnaires on 247 practicing estate surveyors within Lagos metropolis, Nigeria in 2006. These were selected through alphabetic systematic sampling of estate surveyors from the list of financial members with designations (2004/2005) of the Lagos state branch of Nigerian Institution of Estate Surveyors and Valuers. The survey achieved a total response rate of 85 percent. Statistical tools employed in analyzing data were relative importance indices and factor analysis.

Findings

The findings suggest that training in FM and type of business of the organisation managed by the estate surveyor were significant factors that influence surveyors' participation in areas of core competence in FM.

Research limitations/implications

Owing to time constraints, authors have only studied one location. No urban area can be representative of all cities in the country. Nevertheless, the results of the study should at least apply to the majority because most of the estate surveyors in Nigeria are based in Lagos.

Originality/value

The paper introduces an empirical approach to the discussion on role of estate surveyors in FM in Nigeria.

Details

Journal of Facilities Management, vol. 7 no. 3
Type: Research Article
ISSN: 1472-5967

Keywords

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Article
Publication date: 13 November 2017

Yetunde Aderonke Adeyemi, Oluseye Olusegun Onabanjo, Silifat Ajoke Sanni, Regina Ngozi Ugbaja, David Olaulowa Afolabi and Catherine Adebukola Oladoyinbo

There is a global increase in the prevalence of metabolic syndrome (MetS) with relative paucity of data on the burden of this syndrome in developing countries like…

Abstract

Purpose

There is a global increase in the prevalence of metabolic syndrome (MetS) with relative paucity of data on the burden of this syndrome in developing countries like Nigeria. This study evaluated the prevalence of MetS among apparently healthy subjects in Nigeria.

Design/methodology/approach

A population-based cross-sectional study was conducted with 550 (249 men, 301 women) healthy subjects recruited using multi-stage technique. Anthropometric measurements were taken using standard procedures and instruments. Systolic and diastolic blood pressure was measured in all the subjects. Blood samples were collected from selected subjects and analyzed for hematological variables.

Findings

The prevalence of MetS was 36.8 per cent using the IDF criteria and 34.6 per cent using the NCEP-ATP III criteria. In all, 1.64 per cent (9) of respondents were underweight, 22.55 per cent (124) were of normal body mass index, 49.64 per cent (273) were overweight and 26.17 per cent (144) were obese. The mean waist circumference and waist to hip ratio for male and female were 83.27 ± 2.6 cm and 0.84 ± 0.1 and 86.22 ± 13.9 cm and 0.84 ± 0.1, respectively. Total cholesterol was elevated in 16.04 per cent of the respondents, low high-density lipoprotein cholesterol was observed in 41.83 per cent of the respondents. High values of triglycerides were observed in 5.79 per cent of respondents. Elevated low-density lipoprotein cholesterol was observed in 40.85 per cent of the respondents. This study showed that a huge burden of MetS exists among the study population.

Research limitations/implications

The cross-sectional design of this study limits inference regarding causality and effects. Also, there was no controlled case in the study.

Practical implications

There is the need for accurate knowledge of the MetS of the population to inform public health policy for mitigation.

Social implications

MetS has been described as a global time bomb, with a quarter of the world’s adults estimated to be having the condition. It will place a burden on social services if a lot of working population are forced to retire early due to MetS.

Originality/value

The findings are pointers to the probable magnitude of the co-morbid factors of cardiovascular diseases as encapsulated in the MetS in our environment.

Details

Nutrition & Food Science, vol. 47 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

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Article
Publication date: 8 March 2011

Olusegun Ogunba

The paper aims to address concerns that valuers' choice of depreciation models in their cost approach to value is not sustainable (is incapable of preserving patronage in…

Abstract

Purpose

The paper aims to address concerns that valuers' choice of depreciation models in their cost approach to value is not sustainable (is incapable of preserving patronage in present and future generations).

Design/methodology/approach

The paper draws up conceptual expectations regarding how seven UK and US depreciation models pass or fail four identified sustainability indicators: reliability, consistency, usability and separate treatment of depreciation components. Valuation surveyors in Nigeria were offered as a case study of how valuers in one country respond to such conceptual investigations.

Findings

The study found that cross‐sectional models, the breakdown model and hedonic modeling are the depreciation models perceived as most sustainable. However, popular model use follows easiest models rather than most sustainable models.

Practical implications

The paper suggests that the pursuit of sustainability in valuation modeling should involve provision of institutionalized best practice guidance beyond that currently provided so as to assist valuers/appraisers in more sustainable choices.

Originality/value

The paper is probably the first to address both UK and US depreciation models and to assess each using defined sustainability criteria.

Details

Journal of Property Investment & Finance, vol. 29 no. 2
Type: Research Article
ISSN: 1463-578X

Keywords

Content available
Article
Publication date: 1 March 2010

Olalekan U. Asikhia

This article seeks to identify the mediating role of marketing resources and capabilities in small and medium enterprises (SMEs)‐poverty alleviation relationship. A

Abstract

This article seeks to identify the mediating role of marketing resources and capabilities in small and medium enterprises (SMEs)‐poverty alleviation relationship. A qualitative approach of conceptualization of the interconnectedness of the major variables of the study is undertaken. Despite several development programs of SMEs and poverty alleviation, the poverty level of Nigerian SMEs has dragged with incidence of high SMEs failure. Marketing resources and capabilities are suggested as probable missing links between SMEs and profitable exchanges that lead to wealth creation, thus alleviating and eradicating poverty. While empirical study in this direction is vital, the current conceptual model shows that SMEs operators would help in the elimination of poverty by acquisition of necessary marketing knowledge, skills, and capabilities to identify the customersʼ needs, establish vital relationships with them through requisite ego drive, empathy, and capability to change, and thus keep them sold. Prior research concerning SMEs and poverty alleviation in Nigeria has been limited to finance. The findings of the present research have implications for the role of marketing as the ultimate source of profitable growth through exchanges and wealth creation that will help in eradicating poverty.

Details

New England Journal of Entrepreneurship, vol. 13 no. 2
Type: Research Article
ISSN: 2574-8904

Keywords

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Article
Publication date: 1 July 2014

Ade Thompson Ojo and Olusegun Felix Ayadi

The purpose of this paper is to investigate if the prevalence of corruption and other unwholesome financial practices in Nigeria contributed substantially to the stunted…

Abstract

Purpose

The purpose of this paper is to investigate if the prevalence of corruption and other unwholesome financial practices in Nigeria contributed substantially to the stunted growth of the capital market in general, and the stock market in particular.

Design/methodology/approach

The paper employed Gregory–Hansen cointegration approach to test the long-run equilibrium relationship between the occurrence of predatory banking practices and stock market capitalization in Nigeria.

Findings

There exists a long-run equilibrium relationship between bank fraud and stock market capitalization but with a structural break in 2005.

Practical implications

There is an urgent need to overhaul and re-assess from time to time the existing systems of internal checks and controls in banks, as well as other financial institutions in Nigeria.

Originality/value

This paper is the first to empirically test the long-run equilibrium relationship between bank fraud and stock market capitalization in Nigeria.

Details

Journal of Financial Crime, vol. 21 no. 3
Type: Research Article
ISSN: 1359-0790

Keywords

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Book part
Publication date: 24 October 2018

Shola Abidemi Olabode

Abstract

Details

Digital Activism and Cyberconflicts in Nigeria
Type: Book
ISBN: 978-1-78756-014-7

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