bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical investigation of double-diffusive mixed convection in horizontal annulus partially filled with a porous medium
Authors: Moderres Mourad , Abboudi Said , Ihdene Malika , Aberkane Sofiane , Ghezal Abderahmane 
Published: March 2017

Purpose
Double-diffusive convection within a tri-dimensional in a horizontal annulus partially filled with a fluid-saturated porous medium is numerically investigated. The aim of this work is to understand the effects of a source of heat and solute on the fluid flow and heat and mass transfer rates.

Design/methodology/approach
In the formulation of the problem, the Darcy–Brinkman–Forchheimer model is adopted to the fluid flow in the porous annulus. The laminar flow regime is considered under steady state conditions. Moreover, the transport equation for continuity, momentum, energy and mass transfer are solved using the Patankar–Spalding technique.

Findings
Through this investigation, the predicted results for both average Nusselt and Sherwood numbers were correlated in terms of Lewis number, thermal Grashof number and buoyancy ration. A comparison was made with the published results and a good agreement was found.

Originality/value
The paper’s results are validated by favorable comparisons with previously published results. The results of the problem are presented in graphical forms and discussed. This paper aims to study the behavior of the flow structure and heat transfer and mass for different parameters.
Pore scale evaluation of thermal conduction anisotropy in granular porous media using Lattice Boltzmann method
Authors: Askari R. , Ikram M.F. , Hejazi S. H. 
Published: March 2017

Purpose
Thermal conduction anisotropy, which is defined by the dependency of thermal conductivity on direction, is an important parameter in many engineering and research studies such as the design of nuclear waste depositional sites. In this context, the authors aim to investigate the effect of grain shape in thermal conduction anisotropy using pore scale modeling that utilizes real shapes of grains, pores and throats to characterize petrophysical properties of a porous medium.

Design/methodology/approach
The authors generalize the swelling circle approach to generate porous media composed of randomly arranged but regularly oriented elliptical grains at various grain ratios and porosities. Unlike previous studies that use fitting parameters to capture the effect of grain–grain thermal contact resistance, the authors apply roughness to grains’ surface. The authors utilize Lattice Boltzmann method to solve steady state heat conduction through medium.

Findings
Based on the results, when the temperature field is not parallel to either major or minor axes of grains, the overall heat flux vector makes a “deviation angle” with the temperature field. Deviation angle increases by augmenting the ratio of thermal conductivities of solid to fluid and the aspect ratios of grains. In addition, the authors show that porosity and surface roughness can considerably change the anisotropic properties of a porous medium whose grains are elliptical in shape.

Originality/value
The authors developed an algorithm for generation of non-circular-based porous medium with a novel approach to include grain surface roughness. In previous studies, the effect of grain contacts has been simulated using fitting parameters, whereas in this work, the authors impose the roughness based on the its fractal geometry.
A novel blast-mitigation concept for light tactical vehicles
Authors: Grujicic Mica , d’Entremont Brian , Snipes Jennifer , Ramaswami S. 
Published: March 2017

Purpose
A new concept solution for improving blast survivability of the light tactical military vehicles is proposed and critically assessed using computational engineering methods and tools.

Design/methodology/approach
The solution is inspired by the principle of operation of the rocket-engine nozzles, in general and the so called “pulse detonation” rocket engines, in particular, and is an extension of the recently introduced so-called “blast chimney” concept (essentially a vertical channel connecting the bottom and the roof and passing through the cabin of a light tactical vehicle). Relative to the blast-chimney concept, the new solution offers benefits since it does not compromise the cabin space or the ability of the vehicle occupants to scout the environment and, is not expected to, degrade the vehicle’s structural durability/reliability. The proposed concept utilizes side vent channels attached to the V-shaped vehicle underbody whose geometry is optimized with respect to the attainment of the maximum downward thrust on the vehicle. In the course of the channel design optimization, analytical and computational analyses of supersonic flow (analogous to the one often used in the case of the pulse detonation engine) are employed.

Findings
The preliminary results obtained reveal the beneficial effects of the side channels in reducing the blast momentum, although the extent of these effects is quite small (2-4 per cent).

Originality/value
To the authors’ knowledge, the present work is the first exploration of the side-vent-channels concept for mitigating the effect of buried-mine explosion on a light tactical vehicle.
Flow and heat transfer of couple stress fluid in a vertical channel in the presence of heat source/sink
Authors: Umavathi Jawali , Prathap Kumar Jada , Pop Ioan , Shekar Murudappa 
Published: March 2017

Purpose
The purpose of this paper is to consider the problem of fully developed laminar mixed convection flow of a couple stress fluid in a vertical channel with the third-kind boundary conditions in the presence or absence of heat source/sink effect.

Design/methodology/approach
Through proper choice of dimensionless variables, the governing equations are developed. These governing equations are solved analytically by the differential transform method and numerically by the Runge–Kutta shooting method. Analytical solutions for the velocity and temperature profiles for heat generation and absorption of the problem are reported.

Findings
The mass flow rate and Nusselt numbers at both the left and right channel walls on mixed convection parameter, Brinkman number, couple stress parameter and heat generation/absorption parameter for equal and unequal Biot numbers are presented. Favorable comparisons of special cases with previously published work are obtained. It is found that velocity, temperature, mass flow rate and Nusselt number decrease with couple stress parameter and increase with mixed convection parameter and Brinkman number.

Originality/value
The work done in this paper is not done earlier to the authors’ knowledge. This is the first paper in which the sixth-order differential equation is solved using the semi-numerical method, which is a differential method.
Educational leadership and im/migration: preparation, practice and policy – the Swedish case
Authors: Norberg Katarina 
Published: March 2017

Purpose
Migration to Sweden dramatically increased in 2015 and challenged the reception system at all levels and societal institutions, one of which was the school. As a response to the lack of a comprehensive educational strategy for newly arrived students, new regulations were passed in January 2016, the purpose of which was to guarantee equity and equality in education for all students, irrespective of their background. The regulations make demands on local politicians and the school leaders to adjust the reception, organization and teaching to support the newly arrived students’ learning. The purpose of this paper is to explore school leadership practices in turbulent times.

Design/methodology/approach
The study is situated in the field of post-migration ecology, as newly arrived students move from pre-migration to transmigration to post-migration contexts, the latter for this paper’s interest, when they arrive to their new schools. Seven principals in a transit municipality for migrants were interviewed to obtain a picture of how they are prepared for diversity in leadership and how policy and practice coincide.

Findings
The study reveals how policy and practice coincide due to a lack of intercultural and bilingual competences among the staff. The principal’s responsibility for a school structure and culture that support newly arrived students’ learning raises new demands on how principals are trained for diversity.

Originality/value
The study is a contribution to the little-researched field concerning school leadership and newly arrived students which raises new demands regarding how principals are trained for diversity.
Leading schools with migrant children in Shanghai
Authors: Qian Haiyan , David Walker Allan 
Published: March 2017

Purpose
The purpose of this paper is threefold: to sketch the current policy context that frames the education of migrant children in Shanghai; to explore the work lives of school leaders in the privately owned but government-supported schools; and to understand the socio-cultural and educational factors that shape the leadership practices in these schools.

Design/methodology/approach
This paper drew from publicly accessible policy papers and interview data with four principals leading migrant children’s schools in Shanghai.

Findings
Migrant children’s schools have received increasing policy recognition and attention. Principals of these schools have strived to adopt various leadership strategies to enhance the quality of education as received by migrant children. However, due to the institutional barriers such as hukou, multiple challenges continue to face migrant children and leaders leading migrant schools.

Originality/value
This is one of the first few papers that collected data from principals leading migrant children’s schools. The paper contributes to further understandings about leadership in high-needs school context and about education quality and equity in relation to programme for international student assessment success in Shanghai.
A previous trainee experience: does it matter for retention of young graduates?
Authors: Cesário Francisco , Chambel Maria José 
Published: March 2017

PurposeThis paper aims to explore the extent to which participation in a previous graduate recruitment programme affects graduates’ organisational affective commitment and their desire to remain.Design/methodology/approachWith the support of a Portuguese organisation that annually operates a trainee programme to attract the best graduates from top universities, a questionnaire with human resource management (HRM) practices, affective commitment and turnover intention scales was used, with data collected from 168 recent recruited graduates representing two groups: graduates with previous participation in the trainee programme and graduates non-trainees.FindingsDespite the company’s expectation that graduate trainees would present higher levels of affective commitment and lower intentions to voluntarily leave than employees recruited by traditional procedures, thet-test results show no significant differences between groups. However, correlations for both groups show a significant positive association between perceived HRM practices and affective commitment and a negative relation with turnover intention. These results suggest that placing a high value on HR practices leads to reinforcement of employment relations and a decrease in the desire to voluntarily leave.Practical implicationsThe findings suggest the need for organisations to rethink their recruitment strategies and raise an interesting question with regard to organisational strategy: is it useful or fair to create two groups of graduates within the same organisation, because we may be promoting the development of two micro-cultures?Originality/valueThe study with this specific group is needed because of an increased implementation of trainee programmes all over Europe as a means of attracting graduates. The literature is scarce, focusing only on trainees’ attitudes compared to those recruited through traditional procedures.
Do compositions of board and audit committee improve financial disclosures?
Authors: Haldar Arunima , Raithatha Mehul 
Published: March 2017

PurposeThis paper aims to examine the impact of corporate governance practices on the level of financial disclosures made by the Indian firms. This assumes importance in the context of the role of financial disclosures in addressing the agency problem.Design/methodology/approachFinancial disclosure score is computed by considering disclosures provided by the generally accepted accounting principles and is the dependent variable. The independent variable – corporate governance score – is an index comprising internal governance mechanisms. The authors empirically examine the impact of corporate governance practices on financial disclosure using multiple regression model for 200 large listed Indian firms.FindingsThe study suggests that quality of governance practices significantly improves financial disclosure practices of the firm. Particularly, the composition of the audit committee is effective in improving disclosures.Practical implicationsThe finding has implications for policy makers and practitioners. It will help investors, lenders, and other stakeholders to assess firms’ financial disclosure quality. In addition, the findings, suggest the influence of governance practices on disclosure, might help in the formulation of appropriate policies about board structure and audit function. It is also a call to investors to emphasize on governance quality of the investing firms.Originality/valueThe study builds a case for an urgent intervention for improving the existing governance standards to advance the quality of financial disclosure in an emerging market context.
The impact of horizontal conflict on reducing vertical conflict in Japan’s retail organizations
Authors: Seo Eunji , Takashima Katsuyoshi 
Published: March 2017

PurposeThe purpose of this study is to investigate the negative impact of horizontal conflict on vertical conflict in a triadic configuration, which is based on the supposition that buyers who experience horizontal conflict due to competition with other buyers are motivated to limit vertical conflict to better cooperate with store staff.Design/methodology/approachThis study tests the hypotheses with an AMOS-based structure equation model based on survey data of 236 merchandise managers at Japanese retailers.FindingsThe study’s findings demonstrate that process conflict concerning resource and role allocation, negatively affects the task conflict and relationship conflict involved in vertical interactions. The results suggest that conflict between buyers is an accelerative mechanism affecting the construction of cooperative relationships between buyers and store staff.Originality/valuePrevious studies have discussed the possibility of positive effects arising from process conflict. In this study, the authors found that horizontal process conflict tolerates vertical conflict statistically and identified a new positive effect of process conflict.
Job satisfaction as a form of organizational commitment at the military strategic level
Authors: Alvinius Aida , Johansson Eva , Larsson Gerry 
Published: March 2017

PurposeIt has been claimed that job satisfaction is the most important and frequently studied attitude in organizational behaviour research. However, as most studies relate to lower hierarchical levels, the purpose of this paper is to gain a deeper understanding of job satisfaction and organizational commitment among high-level managers – military leaders in this case.Design/methodology/approachA grounded theory approach was used. The empirical material is based on 12 interviews, two of which were with women. The informants had wide experience of a number of leadership positions as well as participation in international operations. Their ranks ranged from Colonel to Brigadier General, and they represented army and naval units, the Armed Forces Headquarters and Swedish Defence University.FindingsThe qualitative analysis resulted in a theoretical model that describes the job satisfaction of military leaders at the strategic level, which concerns establishing and balancing organizational commitment. This means that top level managers develop, manage and recreate a “sense of oneness” between themselves and the organization – a strong identification that is established, challenged, changed and renegotiated in a continuous process. Establishing and balancing organizational commitment is built on two overarching categories: keeping up the organizational image and responding to organizational greediness.Research limitations/implicationsResearch limitations are as follows: small sample, lack of representativeness and lack of elaboration on possible gender-related aspects.Practical implicationsThe suggested model may be valuable in educational settings when evaluating the job satisfaction and organizational commitment of high-level officers. The model may have practical implications when it comes to selection, retention and leader development of high-level military officers.Originality/valueA new integrative, theoretical model of job satisfaction and organizational commitment of high-level officers is developed and discussed.
Reconfiguring the firm’s core technological portfolio through open innovation: focusing on technological M&A
Authors: Shin Seungryul Ryan , Han John , Marhold Klaus , Kang Jina 
Published: March 2017

PurposeThe purpose of this study is to investigate the effects of open innovation, especially focusing on technological M&A, on subsequent innovation and changes to the firm’s core technological portfolio.Design/methodology/approachThe study suggests three types of core technological areas, based on prior focus and experience in technological categories. These are 1) the existing core area, in which the acquirer firm retains its knowledge and expertise, 2) the enhanced core area, where knowledge and expertise in the acquirer firm’s insufficient areas are strengthened, and 3) the new core area, i.e. new knowledge fields in which the acquirer firm ventures into. The study then analyzes the effects of two key knowledge characteristics of the target firm, similarity and complementarity, on post-M&A innovation outcomes in each of the three core technological areas.FindingsThe results confirm that while none of the investigated knowledge characteristics of the target firm is advantageous for post-M&A innovation outcomes in existing core areas, similarity of the target firm does facilitate post-M&A innovation outcomes in enhanced core areas. Moreover, the results confirm that complementarity of the target firm is beneficial for post-M&A innovation outcomes in new core areas.Originality/valueThe study explains the reconfiguration mechanism of a firm’s core technological portfolio. It also suggests an extended framework to analyze innovation outcomes in more detail. Moreover, the study helps to explain why most M&As result in failure.
Teams and lead creators in cultural and creative industries: evidence from the Italian haute cuisine
Authors: Savino Tommaso , Messeni Petruzzelli Antonio , Albino Vito 
Published: March 2017

PurposeInto cultural and creative industries, the innovation is increasingly realized by a lead creator which is supported by a specific team. Hence, this paper aims to understand the composition of this particular team.Design/methodology/approachThe authors conducted an in-depth case study of “Dal Pescatore”. This is the Italian restaurant keeping the highest award previewed by Michelin Guide from the longer period. The main figures of the restaurant are the head chefs (Nadia and Giovanni Santini) who are continually supported by a dedicated teamFindingsThe analysis underlines the necessity to create a team which combines aged people linked to firms’ tradition with a low percentage of young foreign apprentices. If the old-timer member assures a deep understanding of the firm’s knowledge base, the young foreign apprentice can show an high learning attitude through which he/she more easily shares their different knowledge.Research limitations/implicationsThis study discussed organizational efforts to foster innovation capacities of the main individuals into a firm. However, the present research suffers from some limitations which limits the generalizability of the results beyond the company studied: a single case study on a small and family firm with consolidated organizational routines. In addition, this research does not solutions about the mechanisms of interaction among these different team members.Originality/valueRecent studies observed how a number of cultural and creative firms innovate through a particular team that develops the ideas of a lead creator. Nevertheless, despite the increasing importance of these teams, their composition remains unclear.
On the path towards open innovation: assessing the role of knowledge management capability and environmental dynamism in SMEs
Authors: Martinez-Conesa Isabel , Soto-Acosta Pedro , Carayannis Elias George 
Published: March 2017

PurposeThis study aims to shed light on the internal and external antecedents of open innovation (OI) in the context of small- and medium-sized enterprises (SMEs), with a special focus on the role of knowledge management (KM) capability. The paper develops and tests an integrative research model which assesses the effect of internal factors on KM capability; the impact of organizational and external factors, namely, KM capability and environmental dynamism, on OI; and whether environmental dynamism moderates the relationship between KM capability and OI.Design/methodology/approachDrawing on the knowledge-based view and the social exchange and the contingency theories, this paper develops an integrative research model which analyzes several relations between organizational antecedents of KM capability and its effect on OI by using covariance-based structural equation modeling on a data set of Spanish SMEs.FindingsResults confirm that information technology-supported operations and commitment-based human resource practices have a positive and significant influence on KM capability. In contrast, results do not find support for the relationship between interdepartmental connectedness and KM capability, whereas both KM capability and environmental dynamism have a direct influence on OI.Originality/valueThis paper adds to existing research on OI, as it is the first study that addresses the critical role of KM capability for the implementation of OI.