bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulations of two-dimensional steady isothermal and non-isothermal steady flows with slip for a viscoelastic memory-integral fluid
Authors: Chine Adel , Ammar Amine , Clermont J.R. 
Published: October 2015

Purpose
– The purpose of this paper is to compute flow effects of the transition from adherence-to-slip in two-dimensional flows, for a polymer melt obeying a memory-integral viscoelastic equation, in isothermal and non-isothermal cases.

Design/methodology/approach
– Temperature dependence is expressed by Arrhenius and William-Landel-Ferry models. A coupling approach is defined. For the dynamic equations, the Stream-Tube Method (STM) is used with finite differences in a mapped rectangular domain of the real domain, where streamlines are parallel and straight. STM avoids particle-tracking problems and allows simple formulae to evaluate stresses resulting from the constitutive equation. For the temperature field, a finite-element method is carried out to solve the energy equation in the real domain.

Findings
– The approach avoids numerical problems arising with classical formulations and proves to be robust and efficient. Large elasticity levels are attained without convergence and refinement difficulties that may arise close to the “stick-slip” transition section. The method highlights the role of temperature conditions and reveals interesting differences for the ducts considered.

Practical implications
– The results of the study are of interest for polymer processing where slip at the wall can be encountered, in relation with the physical properties of the materials.

Originality/value
– The paper presents a simple approach that limits considerably numerical problems coming from stick-slip boundary conditions and avoids particle-tracking. Results are obtained at flow rates encountered in industrial conditions.
Forced convection heat and mass transfer of MHD nanofluid flow inside a porous microchannel with chemical reaction on the walls
Authors: Moshizi S. A. 
Published: October 2015

Purpose
– The purpose of this paper is to focus on convective heat and mass transfer characteristics of Cu-water nanofluid inside a porous microchannel in the presence of a uniform magnetic field. The walls of the microchannel are subjected to constant asymmetric heat fluxes and also the first order catalytic reaction. To represent the non-equilibrium region near the surfaces, the Navier’s slip condition is considered at the surfaces because of the non-adherence of the fluid-solid interface and the microscopic roughness in microchannels.

Design/methodology/approach
– Employing the Brinkman model for the flow in the porous medium and the “clear fluid compatible” model as a viscous dissipation model, the conservative partial differential equations have been transformed into a system of ordinary ones via the similarity variables. Closed form exact solutions are obtained analytically based on dimensionless parameters of velocity, temperature and species concentration.

Findings
– Results show that the addition of Cu-nanoparticles to the fluid has a significant influence on decreasing concentration, temperature distribution at the both walls and velocity profile along the microchannel. In addition, total heat transfer in microchannel increases as nanoparticles add to the fluid. Slip parameter and Hartmann number have the decreasing effects on concentration and temperature distributions. Slip parameter leads to increase velocity profiles, while Hartmann number has an opposite trend in velocity profiles. These two parameters increase the total heat transfer rate significantly.

Originality/value
– In the present study, a comprehensive analytical solution has been obtained for convective heat and mass transfer characteristics of Cu-water nanofluid inside a porous microchannel in the presence of a uniform magnetic field. Finally, the effects of several parameters such as Darcy number, nanoparticle volume fraction, slip parameter, Hartmann number, Brinkman number, asymmetric heat flux parameter, Soret and Damkohler numbers on total heat transfer rate and fluid flow profiles are studied in more detail. To the best of author’s knowledge, no study has been conducted to this subject and the results are original.
An efficient numerical and experimental system identification approach for a flexible manipulator
Authors: Tarvirdizadeh Bahram , Khanmirza Esmaeel , Ebrahimi Morteza , Kalhor Ahmad , Vakilipour Shidvash 
Published: October 2015

Purpose
– The purpose of this paper is to propose an efficient and straightforward approach for system identification of a rotating single link flexible manipulator (RSLFM). Also, the achieved results are experimentally validated through identification procedure.

Design/methodology/approach
– The proposed system identification approach is applied to a RSLFM with a tip mass. At first, the dynamic model of the system is derived using Lagrange method. Then, an efficient method is developed for identification of such a system. This method facilitates the nonlinear complicated identification problem of the RSLFM to a simplified root finding problem.

Findings
– The main advantage of the developed method is to convert a complicated system identification process to a simple nonlinear equation solution. This approach uses small-size input/output data set and requires a short-time interval of data acquisition, which gives important advantages in lower computational load and lower execution time. The investigated approach is studied on experimental system identification of a single link flexible manipulator. To demonstrate this fact, the developed method is successfully applied in identification of two other mechanical systems; the inverted pendulum on a cart and the ball and beam apparatus.

Originality/value
– In this work, the proposed identification approach has been originally applied to a RSLFM and two other mechanical examples. All obtained identification results show the performance and applicability of the developed method clearly. This approach is not restricted in using state space or transfer function. It has significant superiority in comparison with other known approaches including autoregressive with exogenous input (ARX) and Box-Jenkins (BJ).
Variants of an adaptive penalty scheme for steady-state genetic algorithms in engineering optimization
Authors: Lemonge Afonso C.C , Barbosa Helio J.C. , Bernardino Heder S. 
Published: October 2015

Purpose– The purpose of this paper is to propose variants of an adaptive penalty scheme for steady-state genetic algorithms applied to constrained engineering optimization problems.Design/methodology/approach– For each constraint a penalty parameter is adaptively computed along the evolution according to information extracted from the current population such as the existence of feasible individuals and the level of violation of each constraint. The adaptive penalty method (APM), as originally proposed, computes the constraint violations of the initial population, and updates the penalty coefficient of each constraint after a given number of new individuals are inserted in the population. A second variant, called sporadic APM with constraint violation accumulation, works by accumulating the constraint violations during a given insertion of new offspring into the population, updating the penalty coefficients, and fixing the penalty coefficients for the next generations. The APM with monotonic penalty coefficients is the third variation, where the penalty coefficients are calculated as in the original method, but no penalty coefficient is allowed to have its value reduced along the evolutionary process. Finally, the penalty coefficients are defined by using a weighted average between the current value of a coefficient and the new value predicted by the method. This variant is called the APM with damping.Findings– The paper checks new variants of an APM for evolutionary algorithms; variants of an APM, for a steady-state genetic algorithm based on an APM for a generational genetic algorithm, largely used in the literature previously proposed by two co-authors of this manuscript; good performance of the proposed APM in comparison with other techniques found in the literature; innovative and general strategies to handle constraints in the field of evolutionary computation.Research limitations/implications– The proposed algorithm has no limitations and can be applied in a large number of evolutionary algorithms used to solve constrained optimization problems.Practical implications– The proposed algorithm can be used to solve real world problems in engineering as can be viewed in the references, presented in this manuscript, that use the original (APM) strategy. The performance of these variants is examined using benchmark problems of mechanical and structural engineering frequently discussed in the literature.Originality/value– It is the first extended analysis of the variants of the APM submitted for possible publication in the literature, applied to real world engineering optimization problems.
Target acceleration method for analysis of RC structures
Authors: Balic Ivan , Mihanovic Ante , Trogrlic Boris 
Published: October 2015

Purpose– The purpose of this paper is to present a new modification of the multimodal pushover method, named the target acceleration method. The target acceleration is the minimum acceleration of the base that leads to the ultimate limit state of the structure, i.e., the lowest seismic resistance.Design/methodology/approach– A nonlinear numerical model is used to determine the target acceleration, which is achieved using the iterative procedure according to the envelope principle. Validation of the target acceleration method was conducted on the basis of the results obtained by incremental dynamic analysis.Findings– The influence of higher modes is highly significant. The general failure vector corresponding to the target acceleration differs from the first load vector and the form of the load with uniform acceleration according to the height of structure, as contained in the European Standard EN 1998-1. Comparison between the target acceleration, including the equivalent structural damping, and the failure peak ground acceleration obtained from the dynamic response of the structure exhibits notably good agreement. This result implies that the equivalent structural damping as calculated according to the formulation presented in this paper should be greater than that suggested in the literature.Originality/value– The originally developed procedure named multimodal pushover target acceleration method can reasonably estimate the minimum acceleration of the base that leads to the ultimate limit state of the structure, and consequently provides a reliable tool for the assessment of the lowest seismic resistance.
Acoustic analysis using a mass-redistributed smoothed finite element method with quadrilateral mesh
Authors: He Zhicheng , Li Guangyao , Zhang Guiyong , Liu Gui-Rong , Gu Yuantong , Li Eric 
Published: October 2015

Purpose
– In this work, an SFEM is proposed for solving acoustic problems by redistributing the entries in the mass matrix to “tune” the balance between “stiffness” and “mass” of discrete equation systems, aiming to minimize the dispersion error. The paper aims to discuss this issue.

Design/methodology/approach
– This is done by simply shifting the four integration points’ locations when computing the entries of the mass matrix in the scheme of SFEM, while ensuring the mass conservation. The proposed method is devised for bilinear quadratic elements.

Findings
– The balance between “stiffness” and “mass” of discrete equation systems is critically important in simulating wave propagation problems such as acoustics. A formula is also derived for possibly the best mass redistribution in terms of minimizing dispersion error reduction. Both theoretical and numerical examples demonstrate that the present method possesses distinct advantages compared with the conventional SFEM using the same quadrilateral mesh.

Originality/value
– After introducing the mass-redistribution technique, the magnitude of the leading relative dispersion error (the quadratic term) of MR-SFEM is bounded by (5/8), which is much smaller than that of original SFEM models with traditional mass matrix (13/4) and consistence mass matrix (2). Owing to properly turning the balancing between stiffness and mass, the MR-SFEM achieves higher accuracy and much better natural eigenfrequencies prediction than the original SFEM does.
Enacting a developmental niche for researchers
Authors: Dash D. P. 
Published: October 2015

Purpose– The purpose of this paper is to offer a provisional framework for researcher development in contexts where postgraduate research education is developing.Design/methodology/approach– This is a reflective essay. The author draws out lessons from his research education initiatives in India and Malaysia spread over a decade (2003-2013). The lessons are based on favourable and unfavourable processes which affected those initiatives. The processes are then synthesised in two stages, to arrive at a provisional framework.Findings– The framework is presented as a cyclical process blending five focal themes: identity, connections, network, skills and roles. Implementing such a process would require sustained institutional collaboration and a supportive policy environment.Research limitations/implications– Given the limited experiential basis of this reflective exercise, the framework should be considered provisional in nature. There is a need to discuss and assess the framework in other contexts.Social implications– Countries such as India and Malaysia have set ambitious targets for doctoral completion. Well-endowed scholarships have been put in place. However, doctoral programmes are still not yet widely popular. A need exists to direct policy debates towards the kinds of researchers needed and how to develop those kinds of researchers.Originality/value– The paper presents a first-hand reflective account of the opportunities and constraints of research education in India and Malaysia. The exercise has produced a provisional framework for researcher development that could be adapted and assessed in other contexts.
Destination development and transformation: 50 years of tourism after independence in Singapore
Authors: Henderson Joan C. 
Published: October 2015

Purpose– The purpose of this paper is to present a case study of the evolution of Singapore as a destination for international tourists, comparing contemporary circumstances with those existing 50 years ago when full independence was attained.Design/methodology/approach– A case study methodology is adopted and findings are derived from the analysis of materials in the public domain.Findings– Function as a tourist destination cannot be understood without an appreciation of a place’s history and evolving general economic, political and socio-cultural conditions. These determine opportunities and constraints and thus the character and image of the destination from a tourism industry perspective. Singapore is shown to have undergone transformation as a country and consequently as a tourist centre under the leadership of a strong government which has brought prosperity to the now highly urbanised and industrialised city state. Achievements are considerable, although the future is one of some uncertainty as the wider context continues to change in ways which pose new challenges.Research limitations/implications– The paper’s core argument is that performance as a destination cannot be separated from broader circumstances demonstrated by comparisons of Singapore’s tourism in 1965 and 2015 and the political, economic, socio-cultural and environmental contexts of the two periods.Originality/value– While possessing many unique attributes related to its defining characteristics, the republic’s experiences afford valuable insights into the dynamics of destination development and especially in nations which are young, small and rapidly modernising.
Tourism destination image development: a lesson from Macau
Authors: Kong Weng Hang , du Cros Hilary , Ong Chin-Ee 
Published: October 2015

Purpose– Drawing upon an analysis of resident and visitor survey data and Macau Government Tourist Office (MGTO) press releases in 2012, the purpose of this paper is to understand the tourism destination image for this tourist historic city produced by these three key stakeholder groups in Macau.Design/methodology/approach– This is achieved using a new stakeholder analysis tool, developed from previous studies, which compares the perspective of the MGTO, the city’s destination marketing organization, with that of its residents and visitors. This study examines the perceptions that residents and visitors have about the general images projected and generated in Macau.Findings– This research highlights the multiplicity of images and producers of images in Macau.Originality/value– The lesson from this case study is that public sector agencies need to acknowledge more clearly the tourism planning role of the host community in particular. The possibility of detecting disconnections and misalignments of shared destination imagery by residents and visitors has implications for the public sector in Macau and other destinations in relation to managing and developing a destination and contributes to a greater understanding of stakeholders and sustainable tourism development overall.
Dark destinations – visitor reflections from a holocaust memorial site
Authors: Liyanage Sherry , Coca-Stefaniak J. Andres , Powell Raymond 
Published: October 2015

Purpose– Dark tourism and, more specifically, visitor experiences at Nazi concentration camp memorials are emerging fields of research in tourism studies and destination management. The purpose of this paper is to build on this growing body of knowledge and it aims to focus on the Second World War Nazi concentration camp at Dachau in Germany to explore the psychological impact of the site on its visitors as well as critical self-reflection processes triggered by this experience.Design/methodology/approach– This micro-netnography resulted in 15 online semi-structured interviews carried out with people who visited Dachau between 2003 and 2015. The interviews involved participants from 11 different nationalities and a range of age groups.Findings– This study has shown that emotions that surface during a tourist’s visit to a concentration camp destination can linger well after they have left the site. In fact, feelings of sadness, depression, anger and existential questions can haunt visitors for a considerable amount of time after their visit. Further reflections by visitors also included a more critical appreciation of world affairs. This is of particular significance when considering the behaviour of tourists in an urban setting.Originality/value– This research builds on previous dark tourism studies related to the on-site emotions experienced by visitors to concentration camp memorial sites and their travel motivation but takes this knowledge further by exploring the hitherto uncharted longer-term post-experience impacts of these sites on their visitors. Recommendations for dark tourism destination practitioners and academics are also provided based in a critical discussion of the research.
Incumbent audit firm pricing: a response to entry of the Big Four accounting firms in India
Authors: Litt Barri , Desai Vikram , Desai Renu 
Published: October 2015

Purpose– The purpose of this paper is to explore the audit price reactions of local accounting firms to the entry of the Big Four accounting firms into the Indian audit market, providing unique insight into emerging market dynamics.Design/methodology/approach– Using financial data from Indian audit clients for a ten-year period from 1996 to 2005, the authors conduct a multivariate regression analysis based on extant audit fee literature.Findings– This study finds evidence of a price-cutting strategy on behalf of the local incumbent accounting firms in response to the entry of the Big Four firms. It also shows small-sized incumbent firms to cut prices more drastically relative to medium-sized incumbent firms.Originality/value– This study provides empirical insight into the pricing dynamics of professional services in an emerging market setting. Such insight is increasingly important in our evermore globalized economy where emerging markets are frequently the targets of expansion.
The influence of family and government-controlled firms on goodwill impairment
Authors: Omar Noraini binti , Mohd-Saleh Norman , Md Salleh Mohd Fairuz , Ahmed Kamran 
Published: October 2015

Purpose
– The purpose of this paper is to examine the effect of ownership structure on the goodwill impairment policy of Malaysian listed firms. In particular, the authors test whether the direction and magnitude of goodwill impairment are related to whether firms are government or family controlled firms. Given the highly concentrated ownership of firms in Malaysia, the authors suggest that the “entrenchment effect” will take precedence over the “alignment effect”, which will be reflected in the accounting policy on goodwill valuation and impairment.

Design/methodology/approach
– This study utilizes logistic and Tobit regressions to test the prediction, controlling for a range of factors that might affect the goodwill impairment decision. The data were manually collected through 579 firm-year observations from the financial reports of companies listed on the Bursa Malaysia web site for the period 2003-2009.

Findings
– The authors find that family controlled firms are more likely to record goodwill impairment than non-family controlled firms. The results are, however, not significant in government-controlled firms. Similar evidence in prior studies finds that Malaysian firms are more likely to recognize and record higher goodwill impairment loss in their first year of adoption than in the subsequent years. Interestingly, in contrast to prior studies, longer chief executive officer (CEO) tenure is found to be positively associated with the likelihood to recognize and record higher impairment of goodwill.

Originality/value
– This paper is one of few studies that examine the role of ownership structure on goodwill accounting policy choice where ownership structure is highly concentrated and government owned firms play a significant role in the economy. The paper also examines goodwill policy choice before, during the transition and subsequent to the adoption of the goodwill standard in Malaysia, which has not been addressed before.