A.A. Aderogba, M. Chapwanya and J.K. Djoko
For a partial differential equation with a fourth-order derivative such as the Cahn-Hilliard equation, it is always a challenge to design numerical schemes that can handle the…
Abstract
Purpose
For a partial differential equation with a fourth-order derivative such as the Cahn-Hilliard equation, it is always a challenge to design numerical schemes that can handle the restrictive time step introduced by this higher order term. The purpose of this paper is to employ a fractional splitting method to isolate the convective, the nonlinear second-order and the fourth-order differential terms.
Design/methodology/approach
The full equation is then solved by consistent schemes for each differential term independently. In addition to validating the second-order accuracy, the authors will demonstrate the efficiency of the proposed method by validating the dissipation of the Ginzberg-Lindau energy and the coarsening properties of the solution.
Findings
The scheme is second-order accuracy, the authors will demonstrate the efficiency of the proposed method by validating the dissipation of the Ginzberg-Lindau energy and the coarsening properties of the solution.
Originality/value
The authors believe that this is the first time the equation is handled numerically using the fractional step method. Apart from the fact that the fractional step method substantially reduces computational time, it has the advantage of simplifying a complex process efficiently. This method permits the treatment of each segment of the original equation separately and piece them together, in a way that will be explained shortly, without destroying the properties of the equation.
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Godswill Ejeohiolei Esechie, Chukwuka Christian Ohueri, Siti Zanariah Ahmad Ishak and Peter Karubi Nwanesi
The importance of smartphones in enhancing students learning, research and development is well-established in many published studies. Nevertheless, due to numerous challenges…
Abstract
Purpose
The importance of smartphones in enhancing students learning, research and development is well-established in many published studies. Nevertheless, due to numerous challenges, Nigerian students are yet to reap from the benefits of smartphones in terms of accessing vital information for learning and development. Therefore, this study aims to develop a framework that will enhance Nigerian students’ ability to use smartphones for learning.
Design/methodology/approach
The SERVQUAL Theory Framework is adapted to actualize the research aim. Moreover, a qualitative (in-depth interview) research approach was used to interview 60 students from 3 public universities in Nigeria. Purposive sampling technique was used to select the interviewees, and the interview data were analysed using thematic content analysis.
Findings
The findings identified the critical constraints that deter Nigerian students from reaping the full potential of smartphones for learning. The constraints are categorized into three groups which include telecommunication companies’ hiccups, such as high cost of internet, poor network services and coverage; government obstacles, such as high tax policies, insufficient electricity supply and lack of basic infrastructure; and university barriers, such as unavailability of Wi-Fi connection for students, lack of equipped university libraries and poor management.
Originality/value
Thus, a holistic Framework for Enhancing Students Smartphones Learning Ability was established to provide fundamental recommendations to the Nigerian Government, telecommunication companies in Nigeria and Nigerian universities to tackle the pressing issues hindering Nigerian students from using their smartphones for learning. This will enhance the smartphone learning experience of Nigerian students.
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Michael Chapwanya, Robert Dozva and Gift Muchatibaya
This paper aims to design new finite difference schemes for the Lane–Emden type equations. In particular, the authors show that the schemes are stable with respect to the…
Abstract
Purpose
This paper aims to design new finite difference schemes for the Lane–Emden type equations. In particular, the authors show that the schemes are stable with respect to the properties of the equation. The authors prove the uniqueness of the schemes and provide numerical simulations to support the findings.
Design/methodology/approach
The Lane–Emden equation is a well-known highly nonlinear ordinary differential equation in mathematical physics. Exact solutions are known for a few parameter ranges and it is important that any approximation captures the properties of the equation it represent. For this reason, designing schemes requires a careful consideration of these properties. The authors apply the well-known nonstandard finite difference methods.
Findings
Several interesting results are provided in this work. The authors list these as follows. Two new schemes are designed. Mathematical proofs are provided to show the existence and uniqueness of the solution of the discrete schemes. The authors show that the proposed method can be extended to singularly perturbed equations.
Originality/value
The value of this work can be measured as follows. It is the first time such schemes have been designed for the kind of equations.
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Mariama Zakari, Courage Simon Kofi Dogbe and Collins Asante
The study aims to assess the moderating role of celebrity characteristics in the relationship between celebrity endorsement and telecommunication companies’ reputation.
Abstract
Purpose
The study aims to assess the moderating role of celebrity characteristics in the relationship between celebrity endorsement and telecommunication companies’ reputation.
Design/methodology/approach
Analysis of results was based on 700 customers in the telecommunication sector. Confirmatory factor analysis was conducted to check for validity and reliability of the observed items. A hierarchical regression model was estimated to test the various hypotheses set for the study.
Findings
The study finds that celebrity endorsement in itself had no significant effect on the reputation of telecommunication companies. Celebrity attractiveness, likeability and trustworthiness had a direct effect (positive) on the reputation of telecommunication companies and positively moderated the effect of celebrity endorsement on telecommunication company reputation. Celebrity expertise had no direct effect on telecommunication company reputation but positively moderated the effect of celebrity endorsement and telecommunication company reputation.
Research limitations/implications
This study was purely quantitative. Future study could consider a mixed approach and include senior management members of the telecom firms for an in-depth interview.
Practical implications
In signing on celebrities as brand ambassadors, management must pay particular attention to celebrity attractiveness, likeability and trustworthiness. This would be more rewarding to the firms.
Originality/value
The study adds to the little empirical knowledge available on celebrity endorsement in sub-Saharan Africa and telecommunication sector in particular.
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Stephen Ayodele Odewale, Jacob Ademola Sonibare and Lukuman Adekilekun Jimoda
Recent developments in the electricity generation sector of Nigeria necessitated the re-assessment of its contribution to air emission level in the country as information provided…
Abstract
Purpose
Recent developments in the electricity generation sector of Nigeria necessitated the re-assessment of its contribution to air emission level in the country as information provided by previous inventory is nearly out-of-date. The purpose of this paper is to quantify the carbon dioxide (CO2) emissions generated from existing thermal power plants in the country.
Design/methodology/approach
Thermal power plants in Nigeria and their installed capacities were identified, and estimation of CO2 emission from each of the plants was carried out using the emission factor method. In addition to the direct emissions generated through the combustion operation of the power plants, indirect emissions resulting from upstream activities such as extraction, production, and transportation of fuels consumed by the thermal power plant was determined using the same method.
Findings
In total, 40 thermal power plants are currently operational in Nigeria. Additional 18 thermal plants are at different stages of completion. The operational thermal plants have average generation output of 40 percent of their installed capacity and produce 87.3 million metric tonne (mmt)/annum CO2 emissions. In total, 66.9 percent of the estimated emissions are direct emissions, i.e. fuel combustion emissions; the rest are indirect emissions. Additional 67.9 mmt was estimated as expected overall emissions from the thermal power plants under construction. Considering the global warming potential of CO2, proactive measures must be taken to regulate its emissions from the country’s thermal power plants.
Originality/value
This paper bridged the information gap existing in the emission inventory from the Nigeria electricity sector by providing up-to-date data on the contribution of the sector to greenhouse gas emission level in the country.
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Naod Mekonnen Anega and Bamlaku Alemu
This study empirically examines the impact of rural roads on consumption of households in Ethiopia.
Abstract
Purpose
This study empirically examines the impact of rural roads on consumption of households in Ethiopia.
Design/methodology/approach
Both descriptive statistics and econometric techniques are used to address the aforementioned objective. Specifically, quantile regression, fixed- and random-effect models are used to understand the impact of rural road quality on welfare.
Findings
The econometric analysis revealed that improving the quality of rural roads and/or creating access to all-weather roads raises households' average real consumption per capita by as much as 10%. The other transport indicator – mode of transport – also has a positive effect on real consumption per capita. The result indicated that real consumption per capita for households using the traditional mode of transport would increase by as much as 7% compared to those using foot as a major mode of transport. However, the fixed quantile estimation result revealed that rural road access has a positive and significant effect on consumption per capita only for the 0.8th and 0.9th percentiles, indicating that the access to roads is not pro-poor.
Research limitations/implications
Improving rural roads to a level of all-weather road standards and provision of agricultural transport facilities should be strategic priorities.
Originality/value
This study provides empirical evidence pertinent to the effect rural mobility has on the consumption of households as well as the pro-poorness of such investments in rural settings.
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Zelda Anne Elum and Mieke Snijder
There is an increasing need for greater awareness and understanding of the risks climate change poses to farming communities so as to inform appropriate adaptive responses. The…
Abstract
Purpose
There is an increasing need for greater awareness and understanding of the risks climate change poses to farming communities so as to inform appropriate adaptive responses. The purpose of this study is to investigate farmers’ climate change impacts, awareness, risk perception and current adaptation strategies adopted to deal with the impacts of climate change on their livelihood.
Design/methodology/approach
This research was undertaken with 67 farmers in Bayelsa State, Nigeria. This study used a combination of focus group discussion and quantitative survey to obtain data. Surveyed farmers were invited to an initial workshop and asked to take photos of climate change impacts on their land and the adaptation strategies being adopted. The photos were analysed and discussed with the farmers in a second workshop. Then, in a third workshop, farmers and other stakeholders came together to rank the most important consequences of climate change and shared knowledge on adaptation strategies. The survey and photovoice data were analysed using descriptive and inferential statistics.
Findings
The results of this study showed that a majority of the farmers were knowledgeable of climate change, mostly got climate information through media. Floods and high temperatures were perceived as the most occurring climate change-related disaster risks. Majority of the farmers perceived climate change as high risk and have taken up multiple adaptation strategies in response to it, including changing planting times, mulching their land and digging irrigation pits. Farmers’ responses indicated that they want to do more but are restricted by financial resources.
Practical implications
This study outcomes provide evidence for a need to consider stakeholders’ participation in planning climate change responses to effectively address the challenges posed by climate change, particularly in coastal agricultural communities. Government and relevant agencies as recommended need to support farmers to undertake needed adaptive strategies to adapt with future flooding, high temperature and drought, providing them with necessary facilities to enhance their adaptive capacities.
Originality/value
To the best of the authors’ knowledge, this was one of the first studies to use photovoice to investigate climate change awareness, impacts and adaptations strategies with majority female farmers in west Africa. This study highlights the importance of participatory approaches to capture grassroots climate adaptation approaches.
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This paper aims to examine the trend of resource development at the University of Calabar Library, using gift items received from 2005 to 2009.
Abstract
Purpose
This paper aims to examine the trend of resource development at the University of Calabar Library, using gift items received from 2005 to 2009.
Design/methodology/approach
The study adopts a descriptive research design based on survey. Relevant documents, including gift and donation files, acquisition records and library accession registers, were examined and analysed to provide answers to questions relating to study objectives.
Findings
The usefulness of gifts to university library resource development is underscored by the quality and currency of the 2,462 volumes of materials received during the study period. Furthermore, the impact that collaborative donor efforts could make towards supporting university library resource development in the information age is highlighted. Associated problems included deficiency in subject coverage, foreign language materials, irregular giving patterns as well as an increasing tendency towards electronic resources acquisition where manual procedures are available.
Practical implications
Acquisition librarians should intensify efforts at soliciting for and directing corporate giving endeavours towards providing for infrastructural support required for university library development in Nigeria. The deficiency in subject coverage highlighted in the study can be addressed if donor agencies are encouraged to adopt relevant library profiles or assign grants to core areas of university academic programs. There is also need for the inclusion or revision of gift statements in collection development policies.
Originality/value
The paper highlights strategies for tackling the challenges of resource acquisition.
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From the heaps of garbage in street corners and highways, to blocked drains and obstructed waterways, Nigerian cities continue to bear marks of environmental degradation…
Abstract
From the heaps of garbage in street corners and highways, to blocked drains and obstructed waterways, Nigerian cities continue to bear marks of environmental degradation occasioned by the business activities of manufacturers. Globally, the picture is no less different as landfills, oceans and beaches bear indubitable testimonies of plastic pollution. While the manufacturers smile to the bank, governments and municipal authorities struggle with their meagre resources to combat the colossal burden of plastic pollution they generated in the course of creating wealth. The use of non-biodegradable materials such as polythene in product packaging is the primary driver of manufacturing-induced environmental degradation in Nigerian cities and other cities of the world. Recent developments in commerce in Nigeria, such as the emergence of the mobile supermarket, are responsible for the geometric increase in street filthiness in the country. Developing strategic alliances amongst Nigerian manufacturers or between manufacturers and municipal authorities is key in ensuring a healthy environment while doing business. However, such alliances must take a clue from the Traditional Ecological Knowledge (TEK) embodied in the environmental consciousness practised in local markets in Nigeria, hereafter referred to as the ‘market-place model’ for environmental stewardship. This model, when replicated in other economies across the globe, would significantly reduce the global burden of plastic wastes and the hazards they pose in the environment. Conscience repayment, provision of refuse collection points, recycling and green packaging are part of ways of operationalising this model in everyday business. Adopting the market-place model in building strategic alliances for environmental stewardship would afford Nigerian manufacturers, and indeed global manufacturers, financial and non-financial business benefits such as cost savings through eco-efficiency, enlightened self-interest and good corporate image.