bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sustainable leadership in a Thai healthcare services provider
Authors: Kantabutra Sooksan 
Published: December 2010

PurposeRhineland leadership practices contrast sharply with the prevailing Anglo/US business model of short‐term maximization of profitability, and are said to lead to greater corporate sustainability, at least in highly developed economies. However, the applicability of Rhineland leadership to less developed economies has not yet been demonstrated. This paper sets out to compare the business practices of a social enterprise that delivers healthcare services in Thailand and Avery's 19 sustainable leadership practices derived from Rhineland enterprises.Design/methodology/approachAdopting a case study approach, multi‐data collection methods included non‐participant observations made during visits to the enterprise, and reference to internal and published documentation and information. Semi‐structured interview sessions were held with many stakeholders, including top management, staff, patients and a former consultant.FindingsIn the Thai healthcare organization studied, evidence was found for compliance with 15 of Avery's 19 sustainable leadership elements, but to varying degrees. The elements were grouped into six core sets of practices: adopting a long‐term perspective, staff development, organizational culture, innovation, social responsibility, and ethical behavior. One element was found to be not applicable, and no evidence was found for conformity with Rhineland principles on the remaining three sustainable practices. The paper concludes that Avery's 19 Rhineland practices provide a useful framework for evaluating the corporate sustainability of this Thai enterprise.Practical implicationsHealthcare enterprises in Thailand and possibly in other Asian countries that wish to sustain their organizational success could adopt Avery's 19 Sustainable Leadership Grid elements to examine their leadership practices, and adjust them to become more sustainable.Originality/valueThe relevance of Rhineland sustainable leadership principles to enterprises in less developed economies remains to be investigated. This study attempts to uncover this unknown.
What is, could be better
Authors: Sandin‐Bojö Ann‐Kristin , Kvist Linda J. , Berg Marie , Wilde Larsson Bodil 
Published: December 2010

PurposeThe aim of this study is to describe how Swedish women, planned for vaginal birth, perceive the quality of intrapartal care that they receive and the subjective importance they ascribe to their care.Design/methodology/approachThe study was nested within a Swedish national survey of intrapartal care. The women whose care was investigated were invited to participate in the current study by the midwife who attended the birth. A total of 1,173 women agreed to answer a questionnaire about “quality of general care” and “quality of specific intrapartal care” at two months postpartum. The questions were posed in two ways, the perceived reality (PR) of care given and the subjective importance (SI) the women ascribed to this care.FindingsA total of 739 women (63 percent) returned their questionnaires. Scores for PR and SI for “quality of general care“ were in the main high (PR range 2.98‐3.81; SI range 2.85‐3.85, out of a possible 4) and also for “quality of specific intrapartal care” (PR range 3.15‐3.86; SI range 3.23‐3.86, out of a possible 4). A total of 12 items showed statistically significantly higher scores for SI than for PR. Of the women, 81 percent agreed fully or mostly that the birth of their child was a positive experience.Originality/valueThe way in which women answer questions about intrapartal care reflects the way in which the questions are posed. This study therefore has asked not only how care was perceived but also what importance individual women ascribed to different areas of their care. The questionnaire used in this study allows identification of areas where “what is, could be better”.
Numerical simulation of sloshing motion inside a two dimensional rectangular tank by level set method
Authors: Wang Chung‐Yueh , Teng Jyh‐tong , Huang George P.G. 
Published: December 2010

PurposeThe purpose of this paper is to develop the numerical simulated methodology for sloshing motion of fluid inside a two dimension rectangular tank, and parametric studies were performed for three parameters – excitation frequency, excitation amplitude, and liquid depth.Design/methodology/approachA numerically simulated methodology by using the cell‐centered pressure‐based SIMPLE scheme and level set method for the sloshing motion of fluid in a rectangular tank has been developed. The convection term in the Navier‐Stokes equations and the equations used in the level set method were treated by the second‐order upwind scheme. The temporal derivative terms were solved by the three‐level second order scheme. The diffusion term in the Navier‐Stokes equations alone was solved by the central‐difference scheme. All algebraic equations were solved by the point Gauss‐Seidel method. A fully implicit scheme to treat the level set distancing equation, written as the advection equation, was developed. In addition, the level set distancing equation was solved by the iterative procedure to determine the variation of free surface.FindingsFor given excitation amplitude together with a liquid depth, the free surface displacement increases when the excitation frequency is less than the resonance frequency of tank. However, the free surface displacement decreases when the excitation is greater than the resonant frequency of the tank. It is noted that the maximum free surface displacement is generated under the circumstance for which the excitation frequency approaches the resonant frequency. The excitation amplitude and the excitation frequency have a substantial effect on the impact pressure on the wall of the tank being investigated.Originality/valueThe sloshing motion of fluid in a rectangular tank has been studied by researchers and scholars using many numerical methods; however, literature employing the level set method to study the sloshing motion of fluid is limited. In this study, the cell‐centered pressure‐based SIMPLE scheme and level set method can be employed to predict the sloshing motion. The numerical methodology can help the engineer to predict sloshing motion of fluid.
Control of vortex shedding from a circular cylinder using imposed transverse magnetic field
Authors: Singha Sintu , Sinhamahapatra K.P. 
Published: December 2010

PurposeThe purpose of this paper is to simulate the flow of a conducting fluid past a circular cylinder placed centrally in a channel subjected to an imposed transverse magnetic field to study the effect of a magnetic field on vortex shedding at different Reynolds numbers varying from 50 to 250.Design/methodology/approachThe two‐dimensional incompressible laminar viscous flow equations are solved using a second‐order implicit unstructured collocated grid finite volume method.FindingsAn imposed transverse magnetic field markedly reduces the unsteady lift amplitude indicating a reduction in the strength of the shed vortices. It is observed that the periodic vortex shedding at the higher Reynolds numbers can be completely suppressed if a sufficiently strong magnetic field is imposed. The required magnetic field strength to suppress shedding increases with Reynolds number. The simulation shows that the separated zone behind the cylinder in a steady flow is reduced as the magnetic field strength is increased.Originality/valueIn this paper, due attention is given to resolve and study the unsteady cylinder wake and its interaction with the shear‐layer on the channel wall in the presence of a magnetic field. A critical value of the Hartmann number for complete suppression of the shedding at a given Reynolds number is found.
Numerical investigation of the influence of a hole imperfection on film cooling effectiveness
Authors: Nemdili Fadéla , Azzi Abbès , Jubran B.A. 
Published: December 2010

PurposeThe purpose of this paper is to report a numerical investigation of jet‐cross‐flow interaction in the presence of imperfection inside the injection hole with application to film cooling of turbine blades.Design/methodology/approachThe work includes the prediction of the thermal and hydrodynamic fields by solving the Reynolds Averaged Navier Stokes and energy equations using the finite volume method with a body‐fitted hexahedral unstructured grid. The turbulence field is resolved by use of the k‐epsilon turbulence model.FindingsThe computational results show a dramatic and rapid decrease of the film cooling effectiveness when the obstruction is superior to 50 per cent. It is found that when the obstruction is close to the exit hole, the thermal protection is significantly reduced.Research limitations/implicationsThe present numerical investigation is simply directed towards a qualitative investigation of hole imperfection effects on film cooling.Practical implicationsThe motivation comes from several industrial applications such as film cooling of gas turbine components and fuel injection. One of the main challenges of using film cooling is the blockage of holes by particles ingested by the engine during landing/take off or due to application of thermal barrier coating or due to combustion particles as well as inaccuracies that result from drilling of holes.Originality/valueThe main goal of the present study is to conduct a numerical parametric investigation rather than reproducing the exact Jovanović's experimentation.
MHD stagnation‐point flow towards a shrinking sheet
Authors: Lok Y.Y. , Ishak A. , Pop I. 
Published: December 2010

PurposeThe purpose of this paper is to theoretically investigate the steady two‐dimensional magnetohydrodynamic (MHD) boundary layer flow over a shrinking sheet. The effects of stretching and shrinking parameter as well as magnetic field parameter near the stagnation point are studied.Design/methodology/approachA similarity transformation is used to reduce the governing partial differential equations to a set of nonlinear ordinary differential equations which are then solved numerically using Keller‐box method.FindingsThe solution is unique for stretching case; however, multiple (dual) solutions exist for small values of magnetic field parameter for shrinking case. The streamlines are non‐aligned and a reverse flow is formed near the surface due to shrinking effect.Practical implicationsThe flow due to a stretching or shrinking sheet is relevant to several practical applications in the field of metallurgy, chemical engineering, etc. For example, in manufacturing industry, polymer sheets and filaments are manufactured by continuous extrusion of the polymer from a die to a windup roller, which is located at a finite distance away. In these cases, the properties of the final product depend to a great extent on the rate of cooling which is governed by the structure of the boundary layer near the stretching surface.Originality/valueThe present results are original and new for the MHD flow near the stagnation‐point on a shrinking sheet. For shrinking case, the velocity on the boundary is towards a fixed point which would cause a velocity away from the sheet. Therefore, this paper is important for scientists and engineers in order to become familiar with the flow behaviour and properties of such MHD flow and the way to predict the properties of this flow for the process equipments.
Design optimisation of a regenerative pump using numerical and experimental techniques
Authors: Quail Francis , Scanlon Thomas , Stickland Matthew 
Published: December 2010

PurposeRegenerative pumps are the subject of increased interest in industry as these pumps are low‐cost, low‐specific speed, compact and able to deliver high heads with stable performance characteristics. However, these pumps have a low efficiency (35‐50 per cent). The complex flow field within the pumps represents a considerable challenge to detailed mathematical modelling. Better understanding of the flow field would result in improvement of the pump efficiency. The purpose of this paper is to consider a numerical and experimental analysis of a regenerative pump to simulate the flow field and math pump performance.Design/methodology/approachThis paper outlines the use of a commercial computational fluid dynamics (CFD) code to simulate the flow field within the regenerative pump and compare the CFD results with new experimental data. A novel rapid manufacturing process is used to consider the effect of impeller geometry changes on the pump efficiency.FindingsThe CFD results demonstrate that it is possible to represent the helical flow field for the pump which has only been witnessed in experimental flow visualisation until now. The CFD performance results also demonstrate reasonable agreement with the experimental tests.Research limitations/implicationsThe design optimisation only considers a number of blade geometry changes. The future work will consider a much broader spectrum of design modifications which have resulted in efficiency improvements in the past.Practical implicationsThe ability to use CFD modelling in conjunction with rapid manufacturing techniques has meant that more complex geometry configurations can now be assessed with better understanding of the flow field effects and resulting efficiency.Originality/valueThis paper presents new flow field visualisation and better correlation to the matched performance than the current limited mathematical models. This paper also presents a novel method for rapid manufacturing of the pump impeller.
Numerical simulations of natural convection heat transfer along a vertical cylinder
Authors: Rafique Muhammad , Ahmad I. , Abdul Basit M. , Begum Romana , Aziz Wajid , Farooq Muhammad , Rasheed Qureshi Kamran 
Published: December 2010

PurposeThe purpose of this paper is to present a numerical solution for the problem of steady laminar flow and heat transfer characteristics of viscous incompressible fluid.Design/methodology/approachFor this purpose a two dimensional code has been developed to simulate the natural convection heat transfer along a vertical cylinder, for four different geometries: from vertical cylinder in infinite medium; from a vertical flat plate in an infinite medium; from an open assembly of a finite vertical cylinder; and from an open rectangular pitch assembly of cylinders.FindingsThe effects of various parameters of interest have been discussed through simulations. The Nusselt numbers of constant wall temperature and constant heat flux cylinders calculated numerically and compared with Lee et al. and Heckel et al., respectively, and are found within reasonable agreement. For large radius, a vertical cylinder has been treated as a vertical flat plate, so that the curvature effects become negligible. For the case of vertical flat plate, Nusselt number has been compared with analytical relation for the local Nusselt number given by Jaluria.Practical implicationsThe natural convection has been studied for four different geometries: the flow regime in all the case studies has been assumed to be Laminar.Originality/valueComputer code developed for current study can be applied to many other geometries to simulate natural convection heat transfer.
Reuse of waste water from ready‐mixed concrete plants
Authors: Tsimas Stamatis , Zervaki Monika 
Published: December 2010

PurposeThe purpose of this study is the examination of the properties of waste water obtained from a ready‐mixed concrete plant and its utilization potential as mixing water for concrete production.Design/methodology/approachSamples of waste water from several points of a water recycling process from a ready‐mixed concrete plant were examined for their chemical properties (Cl‐, SO42‐, alkalies, total solids, pH) and compared with the specifications applied for concrete mixing water. Also samples of dry sludge powder from the water‐recycling process tank were taken and tested for their chemical composition, particle size distribution, mineralogical composition and thermogravimetrical results. The water samples were examined for their behavior in concrete specimens with and without admixtures and also for their effect in water demand and setting times in cement pastes.FindingsAll tests showed that waste water is suitable for concrete mixing water and that it can be used without any treatment or dilution, thus contributing to water saving.Practical implicationsWaste water from ready‐mixed concrete plants is classified as waste hazardous for disposal due to its high pH value (over 11.5). Very few ready‐mixed concrete plants that recycle waste water follow a complicated process through multiple overflows and a stage of neutralization, with HClaq addition.Originality/valueIt is obvious that the results of this investigation contribute to the protection of the environment from hazardous waste water disposal and the ready‐mixed concrete industry from fresh water costs and any additional cost for buying and conserving an unnecessarily complicated water‐recycling system.
Prospects for CO2 capture in European industry
Authors: Rootzén Johan , Kjärstad Jan , Johnsson Filip 
Published: December 2010

PurposeThe aim of this study is to assess the role of CO2 capture and storage (CCS) technologies in the reduction of CO2 emissions from European industries.Design/methodology/approachA database covering all industrial installations included in the EU ETS has been created. Potential capture sources have been identified and the potential for CO2 capture has been estimated based on branch‐ and plant‐specific conditions. Emphasis is placed here on three branches of industry with promising prospects for CCS: mineral oil refineries, iron and steel, and cement manufacturers.FindingsA relatively small number (∼270) of large installations (>500,000 tCO2/year) dominates emissions from the three branches investigated in this study. Together these installations emit 432 MtCO2/year, 8 percent of EU's total greenhouse gas emissions. If the full potential of emerging CO2 capture technologies was realized, some 270‐330 MtCO2 emissions could be avoided annually. Further, several regions have been singled out as particularly suitable to facilitate integrated CO2 transport networks. The most promising prospects for an early deployment of CCS are found in the regions bordering the North Sea.Research limitations/implicationsReplacement/retrofitting of the existing plant stock will involve large investments and deployment will take time. It is thus important to consider how the current industry structure influences the potential to reduce CO2 in the short‐ medium and long term. It is concluded that the age structure of the existing industry plant stock and its implications for the timing and deployment rate of CO2 capture and other mitigation measures are important and should therefore be further investigated.Practical implicationsCCS has been recognized as a key option for reducing CO2 emissions within the EU. This assessment shows that considerable emission reductions could be achieved by targeting large point sources in some of the most emission‐intensive industries. Yet, a number of challenges need to be resolved in all parts of the CCS chain. Efforts need to be intensified from all stakeholders to gain more experience with the technological, economical and social aspects of CCS.Originality/valueThis study provides a first estimate of the potential role for CO2 capture technologies in lowering CO2 emissions from European heavy industry. By considering wider system aspects as well as plant‐specific conditions the assessment made in this study gives a realistic overview of the prospects and practical limitations of CCS in EU industry.
Analyzing long‐term impacts of carbon tax based on the imputed price, applying the AIM/CGE model
Authors: Matsumoto Ken'ichi , Masui Toshihiko 
Published: December 2010

PurposeThe purpose of this study is to analyze long‐term (up to 2100) impacts of carbon tax based on the imputed price of carbon (ICT) from environmental and economic perspectives.Design/methodology/approachICT is an international tax with tax rates that differ among countries according to their economic levels. It is evaluated by comparing it with an internationally common carbon tax (CCT), applying the AIM/CGE [Global] model, a dynamic computable general equilibrium model. The ICT rates are determined from a certain formula and the CCT rates are set to achieve global GDP changes equal to the case of ICT.FindingsAccording to the results, the world CO2abatement amount is almost the same between the two taxes. However, the economic impact on each country is different. Although the negative influence is smaller in the case of CCT in developed countries, it is smaller in the case of ICT in developing countries. Moreover, ICT narrows economic disparities among developed and developing countries further. In the light of significance of the worldwide introduction of CO2abatement policies and avoidance of excessive economic burdens on developing countries, it is concluded that ICT is a more feasible carbon tax policy than CCT.Originality/valueAlthough the impacts of ICT have been analyzed from static and mid‐term perspectives, understanding the long‐term dynamic impacts is still essential, considering the features of the tax and possible socioeconomic and technological changes, especially in developing countries. This study proposes a new policy method that will contribute to efforts to combat climate change in the long run.
The role of education in protected area sustainable governance
Authors: Orlović‐Lovren Violeta 
Published: December 2010

PurposeGlobal challenges that the world faces today call into question people's understanding of sustainability and the actions to be taken to meet that ideal. The role assigned to education in promoting sustainability by international documents has yet to be applied to national strategies in many countries. This paper aims to promote a strategic approach and to identify techniques for analysis to be used in development of quality education programs, tailored to specific needs in protected areas and to sustainability goals in a particular social context.Design/methodology/approachUsing an adult education approach and social science methodology, a proposal for a research framework is offered, seeking a better understanding of the role of education in improving sustainable protected area governance. Within the framework of sustainable development and lifelong learning concepts, the existing gap in the field is discussed and a brief review of the issues present in Serbia as a country in transition is given.Practical implicationsThis approach may be modified to specific contexts and goals, and applied with this purpose to other similar social environments, especially in countries in transition within the region. It may lead to creating more adequate education programs and increased capacities for managing protected areas.Originality/valueThe paper moves away from a project‐driven, ad hoc and rather scholarly to an integral approach to capacities for sustainable protected area governance, including an institutional, organizational and individual level and a lifelong learning perspective. It also promotes a specific, contextual and participatory definition of sustainability, rather than seeking for a universal one.