bluuebunny/crossref_metadata_2025_split huggingface dataset:
Is Giffen behaviour compatible with residential demand for cooking gas and kerosene?
Authors: Arawomo Damilola Felix 
Published: October 2018

Purpose
This paper aims to examine the compatibility of Giffen behaviour with residential demand for kerosene and cooking gas.

Design/methodology/approach
In total, 600 questionnaires were administered on selected households in Ondo State while 485 were retrieved. Both ordinary least square and instrumental variables (IVs) were estimated, while, the IV estimated result was preferred.

Findings
The result showed that Giffen behaviour is compatible with the demand for kerosene in Ondo State, but not for cooking gas. As regard to other factors, prices of the alternatives to kerosene and cooking gas have positive but insignificant impact on the demand for the respective products. Age of the household has a positive significant impact on the demand for kerosene and cooking gas. Household in which the heads has tertiary education demand for kerosene and cooking gas more than those without any form of education. Larger households consume more of both commodities than smaller households.

Research limitations/implications
Based on these findings, the authors recommend that government should continue to subsidize either the production or consumption of household kerosene.

Practical implications
Consumers should not mind the initial expenditure in purchasing cylinder for cooking gas as subsequent expenditure would be lower than that of kerosene.

Social implications
Regulators should brace to ensure that kerosene and cooking gas be made available at government-regulated prices, particularly by checkmating the activities of the “black-marketers.”

Originality/value
Two outstanding knowledge gaps that this paper filled are in the novelty of this paper regarding the application of Giffen behaviour to kerosene and cooking gas. Second, previous studies did not account for the potential endogeneity problem that is inherent in the joint demand for kerosene and cooking gas. This paper took care of this by estimating the model using IVs.
On hydrodynamic lubrication characteristics of ferrofluid film in a spiral groove mechanical seal
Authors: Zhang Penggao , Gu Boqin , Zhou Jianfeng , Wei Long 
Published: October 2018

Purpose
The purpose of this study is to investigate the hydrodynamic lubrication characteristics of ferrofluid film for spiral groove mechanical seal in external electromagnetic field and to analyze the effects of the volume fraction of ferrofluid, parameters of the electromagnetic field, operating parameters and geometrical parameters of mechanical seal on the characteristics of ferrofluid film.

Design/methodology/approach
The relationship between the ferrofluid viscosity and the intensity of external electromagnetic field was established. Based on the Muijderman narrow groove theory, the pressure distribution was calculated with the trial method by trapezoid formula.

Findings
It was found that pressure, average viscosity, average density and opening force of ferrofluid between end faces increase with the increase in intensity of current, volume fraction of ferrofluid, rotating speed, pressure differential and spiral angle; decrease with the increase in temperature; and increase at first and then decrease with the increase in the ratio of groove width to weir and the groove length. All of them reach the maximum value when the ratio of width of groove to weir is 0.7 and the ratio of groove length is 0.6. Leakage of ferrofluid increases with an increase in intensity of current, volume fraction of ferrofluid, rotating speed, pressure differential, spiral angle and ratio of groove length; decreases with an increase in temperature; and increases at first and then decreases with the increase in the ratio of groove width to weir. The tendencies of characteristics of silicone oil are consistent with those of ferrofluid, and the characteristics of silicone oil are smaller than those of ferrofluid under the same condition.

Originality/value
The volume fraction of ferrofluid, rotating speed, spiral angle, ratio of groove width to weir, groove length and temperature have a significant influence on the characteristics of ferrofluid film; however, intensity of current and the pressure differential have slight influence on the characteristics of ferrofluid film. An analytical method for analyzing hydrodynamic lubrication characteristics of ferrofluid film in a spiral groove mechanical seal was proposed based on the Muijderman narrow groove theory.
Effect of structural parameters of oil groove on hydro-viscous drive torque with variable rotational speed
Authors: Xie Fangwei , Guo Xinjian , Wu Diancheng , Zhang Bing , Zheng Xudong , Wang Dengshuai , Wang Yun 
Published: October 2018

Purpose
In this paper, a kind of an oil groove structure which could improve the transmission torque of an oil film was designed, i.e. the width and depth of oil groove gradually decrease with the increase in the radius.

Design/methodology/approach
Effects of the structural parameters of the oil groove on the hydro-viscous drive (HVD) characteristics with variable rotational speed were investigated by means of numerical calculation.

Findings
Research results show that with the decrease of the width and depth of the oil groove at the outer diameter, transmission torque increases, while the temperature is almost unchanged. Keeping the effective area unchanged, comparing the transmitted torque under the oil groove angle θ2 = 0.5° and θ2 = 4.5°, the former was almost 200 per cent of the latter; the torque transmitted with h2 = 0.05 mm was almost 150 per cent of that with h2 = 0.2 mm.

Originality/value
In this paper, the authors analyze the friction surface of the friction plate between the oil groove, oil distribution and oil film transfer torque from the oil groove structure parameters and found methods to improve the transmission torque. For the first time, the influence of the structural parameters of oil groove on the characteristics of HVD was studied under the condition of variable rotational speed, and a better method to improve the transmission torque was proposed.
Corporate social responsibility and financial performance nexus
Authors: Nyeadi Joseph Dery , Ibrahim Muazu , Sare Yakubu Awudu 
Published: October 2018

Purpose
The paper aims to investigate empirically the impact of corporate social responsibility (CSR) on financial performance in South African listed firms.

Design/methodology/approach
The paper uses panel corrected standard errors to estimate the effect of CSR on firm financial performance and thus addresses contemporaneous cross-correlations across the panel cross sections. The study uses a broad base measure of CSR created by the Public Investment Corporation data set and the combination of accounting and economic means of measuring firm financial performance.

Findings
CSR is found to have a strong positive impact on firm financial performance in South Africa. When CSR is decomposed further into its major components, governance performance positively impacts a firm’s financial performance with no evidence of any relationship between social components and firm performance and between environmental components and firm performance. The positive impact of CSR on firm performance is greater in big firms. At the industry level, CSR is noticed to impact positively on financial performance in the extractive industry via good governance and responsible environmental behaviors. It however has no impact on firm performance in the financial sector.

Research limitations/implications
The results should be interpreted with caution and some limitations. Due to the limiting nature of the Public Investment Corporation data set (the survey was carried out on selected firms on the Johannesburg Stock Exchange for three years spanning from 2011 to 2013). This resulted in a sample of 56 firms. It is therefore very problematic to generalize the findings to a larger population over a long period of time. This is more limiting especially on individual sector studies where the sample has further shrunk to a smaller sample. As a result of the smaller sample size, the authors were unable to explore some other sectors which could have given more revealing findings. The authors recommend that future research should explore other data sets or use primary data approach that can allow for more sample size and elongated time period for a more holistic view and for easy generalization of the findings. The authors also identify an important lacuna necessitating further research effort. It would be interesting to empirically examine the threshold point of firms’ size beyond which CSR damages firms’ performance. Knowledge of this will guide managers of firms in their strategic CSR decision.

Practical implications
This study does not only serve as a reference work for subsequent investigations into the impact of CSR on firm performance in sub-Saharan Africa but also serves as a guide to policymakers on the financial impact of CSR adoption.

Originality/value
This study is one of the pioneering works that comprehensively examines the effect of CSR on financial performance amongst South African firms via size and sector and also controls for contemporaneous cross-correlation effects from the firms in the panel set.
The perspective of religious and spiritual tourism research: a systematic mapping study
Authors: Heidari Ali , Yazdani Hamid Reza , Saghafi Fatemeh , Jalilvand Mohammad Reza 
Published: October 2018

PurposeReligious tourism is a form of tourism where people of a particular faith travel to visit places of religious significance in their faith. Previous research into the various aspects of religious and spiritual tourism (RST) has been noticeably extended. The purpose of this study is to perform systematic mapping to provide trends and classification regarding the recent publications in the area of RST.Design/methodology/approachThis study collected 181 papers from five scientific databases, from which 122 were selected to be classified according to six properties: research type, research focus, research method, investigated religion, publication type and time.FindingsThe analysis of these data resulted in a map of the research field, which was presented under three perspectives: the distribution and trends over time of each classification property and the relationship between them. Besides the visual map, the full list of classified papers is available. The results showed that the number of publications is increasing every year, which shows a growing interest in this field. Moreover, the primary research focuses were destination, demand and marketing. Top three journals were found to beInternational Journal of Tourism Research,Tourism Recreation ResearchandJournal of Heritage Tourism. Furthermore, evaluation research, solution proposals and opinion papers were the main research types in the area. In addition, the majority of studies focused on Christianity and Islam. Finally, survey, discussion paper, interview and case study were the predominantly used research methods.Originality/valueThe mapping study delivers the first systematic summary of RST research.
The effects of social capital on knowledge heterogeneity
Authors: Tsai Fu-Sheng , Hsu I-Chieh 
Published: October 2018

PurposeThe purpose of this paper is to examine the influences of social capital on knowledge heterogeneity in order to advance the understanding of the effects and to reconcile existing inconsistent findings.Design/methodology/approachSurvey data collected from 105 new product development (NPD) projects were analyzed with regression-based methods.FindingsThe results indicated that trust, centralization and shared vision as the three social capital dimensions generally have negative impacts on the domain and presentation dimensions of knowledge heterogeneity. However, the three dimensions of social capital do not exhibit consistent influences on the tacitness heterogeneity (i.e. an epistemological dimension of knowledge heterogeneity).Research limitations/implicationsMore research is needed to explore the role of social capital dimensions in developing a range of knowledge attributes of NPD teams, among which knowledge heterogeneity is one. The various dimensions of knowledge an NPD team possesses should have performance implications and deserve future investigation.Originality/valueThe study is one of the first documented attempts to demonstrate contingencies in the relationship between social capital and knowledge heterogeneity. The effect of social capital on knowledge heterogeneity should be understood at the level of dimensions of the two respective constructs.
Fenugreek proteins and their hydrolysates prevent hypercholesterolemia and enhance the HDL antioxidant properties in rats
Authors: Allaoui Amine , Barranquero Cristina , Yahia Sanaa , Herrera-Marcos Luis Vicente , Benomar Souhila , Jridi Mourad , Navarro María Ángeles , Rodriguez-Yoldi Maria Jesús , Nasri Moncef , Osada Jesús , Boualga Ahmed 
Published: October 2018

Purpose
This paper aims to investigate the in vivo hypocholesterolemic property of fenugreek proteins (FP), Purafect-fenugreek protein hydrolysate (PFPH) and Esperase-fenugreek protein hydrolysate (EFPH) on high cholesterol (HC)-fed rats.

Design/methodology/approach
Rats were randomized into five groups: four were fed for four weeks a hypercholesterolemic diet and the tested products were given by gavage. The fifth group was taken as control (C) receiving the same diet without cholesterol.

Findings
Results showed that the elevated aspartate aminotransferase activity in HC group plasma was significantly corrected by FP and EFPH administration (−33 per cent; p = 0.0003). HC liver lipids and total cholesterol (TC) contents were not markedly affected by FP and EFPH. However, liver triglycerides (TG) contents trended to decrease in FP rats vs HC (p = 0.07), while, the TG decrease was significant in groups fed the proteins hydrolysates (p = 0.02). On the other hand, serum TC and TG decreased by 53 per cent (p = 0.0003) and 20 per cent (p = 0.04), respectively, in FP treated rats compared to HC group. This decrease was associated with a high fecal cholesterol excretion (2.5-fold higher in FP vs HC; p = 0.0001). Likewise, EFPH-treated rats exhibited lower TC compared to HC rats (p = 0.004). The very low density lipoprotins was the main affected fraction in these two groups, while there were no significant difference in apolipoproteins (Apo) B, A-I and A-IV contents between the different groups, except in FP group, where Apo A-I and A-IV decreased by 26 and 17 per cent, respectively, compared to C rats (p = 0.02). The high density lipoproteins (HDL) of rats treated with proteins hydrolysates showed a better antioxidant property compared to those of HC rats, which was accompanied with an increase in paraoxonase activity when compared to HC group.

Originality/value
Unlike PFPH which had almost no effect, FPs and EFPH could constitute a nutraceutical ingredient in cardiovascular disease management.
Assessment of iodine intake and deficiency in school-age children in Morocco
Authors: Saeid Naima , Rami Anass , Mounach Samir , Hamrani Abdeslam , El Hamdouchi Asmaa , Mouzouni Fatima Zahra , Baddou Issad , Elkari Khalid , Aguenaou Hassan , El Mzibri Mohammed 
Published: October 2018

Purpose
Iodine deficiency has several adverse effects on human growth and development and it is categorized collectively as iodine deficiency disorders (IDDs). Recent estimations showed that 29.8 per cent of school-age children have insufficient iodine intake. Salt iodization is widely accepted as the best method for increasing iodine intake. In 1995, Morocco adopted the universal salt iodization strategy to reduce iodine deficiency and consequently prevent and control IDDs. This study aims to determine the benefit of this strategy on schoolchildren and adolescent by assessing iodine intake and evaluating iodine deficiency.

Design/methodology/approach
This transversal study was conducted on 131 children and adolescents. Iodine intake was assessed using a food frequency questionnaire. Iodine status was evaluated on 24-h urine samples and the creatinine excretion was used to validate completeness of urine collection.

Findings
The medians of urinary iodine excretion and concentration were 77 µg/day and 96 µg/L, respectively. Overall, 72.5 per cent are deficient, so mild and moderate iodine deficiencies were reported in 58 per cent and 14.5 per cent, respectively, and no child exhibited severe deficiency. A significant difference was reported between iodine deficiency and, sex and age; iodine deficiency was more pronounced in boys and children under eight years. In this study, iodine status in deficient children does not change with the consumption pattern of dairy products and eggs, and results showed no significant association (p > 0.05). However, fish consumption was significantly associated to urinary iodine concentration = 100 µg/L (p = 0.044). Average UIC in school-aged children is still inadequate and consumption of foods high in iodine remains very insufficient. Therefore, additional efforts must focus on nutritional education of Moroccan school-aged children.

Originality/value
In the author’s knowledge, this is the first study evaluating schoolchildren iodine status by 24-h iodine collection; the study reported association of iodine deficiency with dietary habit concerning sources of food rich on iodine.
Educating future corporate managers for a sustainable world: recommendations for a paradigm shift in business education
Authors: Üçok Hughes Mine , Upadhyaya Shikha , Houston Rika 
Published: October 2018

Purpose
This paper aims to argue for a need for a paradigm shift in business education that would move the focus of curriculum away from profit maximization at all costs to incorporation of principles of sustainability.

Design/methodology/approach
This is a conceptual paper that argues for a major shift in business education, one that not only incorporates diversity and interdisciplinarity and integrative learning at its core, but also does not superficially conflate sustainability with corporate social responsibility and/or business ethics.

Findings
This paper discusses the broader concepts of diversity, integrative learning and interdisciplinarity related to curriculum design and several approaches for integrating a broadened definition of sustainability through business school curricula and pedagogy.

Research limitations/implications
The paper only discusses a few of the many factors that are needed for the argued need for change in business school curriculum.

Social implications
It is important to educate future managers with consciousness of sustainability not only for the sake of the communities of today and future generations but also for corporations to stay sustainable in the future when some of the natural resources they use today will be much scarcer.

Originality/value
A typical business school in the twenty-first century is not educating future managers and entrepreneurs for the realities of a business life today, let alone getting them ready for the world of tomorrow in which obtaining resources and addressing supply chain and waste management issues will be remarkably different. Therefore, it has become imperative for business schools to start a paradigm shift that moves the focus of business school education away from the historical one of profit-maximization toward one that has sustainability at its core.
Preparation and selective laser sintering of a new nylon elastomer powder
Authors: Shi Yunsong , Zhu Wei , Yan Chunze , Yang Jinsong , Xia Zhidao 
Published: October 2018

Purpose
This study aims to report the preparation, selective laser sintering (SLS) processing and properties of a new nylon elastomer powder. The effects of solvent, dissolution temperature and time and cooling method and speed on the particle size and morphologies of the prepared nylon elastomer powder are investigated.

Design/methodology/approach
The prepared nylon elastomer power possesses the particle size of around 50 mm and is spherical in shape, indicating that this study provides the feasible dissolution-precipitation process, a distillation cooling method and a suitable solvent to prepare nylon elastomer powders.

Findings
Compared to pure nylon 12, the nylon elastomer has a lower part bed temperature and a wider sintering window for the SLS process. The wider sintering window indicates the better SLS processibility. The lower part bed temperature is beneficial to the recycling of material and the decrease in the requirement of SLS equipment.

Originality/value
The nylon elastomer in this study has a lower part bed temperature and a wider sintering window for the SLS process. The wider sintering window indicates better SLS processibility. The lower part bed temperature is beneficial to the recycling of material and the decrease in the requirement of SLS equipment.
Guardians of the hallways? School resource officers and bullying
Authors: Broll Ryan , Lafferty Robin 
Published: October 2018

PurposeSchool resource officers (SROs) have become commonplace in schools across the USA. Although their visibility may allow them to function as capable guardians, little research has examined their impact on less serious but more common forms of school violence, like bullying. The purpose of this paper is to examine the relationship between the presence, quantity and roles of SROs and the frequency of bullying.Design/methodology/approachData come from the nationally representative 2006 School Survey on Crime and Safety. The relationship between SROs and bullying, controlling for other guardians, motivated offenders and school characteristics, was assessed using ordered logistic regression. Separate models were estimated for middle and high schools.FindingsThere was no association between the presence, quantity or role of SROs and bullying in middle or high schools; however, teacher training was associated with less frequent bullying, especially in middle schools, and the presence of motivated offenders was associated with more frequent bullying.Research limitations/implicationsWhether SROs reduce school violence is contested; this study found no association between SROs and bullying, a less serious but more common form of school violence. Future research should consider the roles of SROs in schools and the credibility of capable guardians.Practical implicationsThe results caution against continuing to divert educational and social service resources to law enforcement in schools. Continued training for teachers may provide more effective guardianship against bullying.Originality/valueThis paper contributes to the developing literature on the effect of SROs on less serious but more common forms of school violence, like bullying.