Search results
1 – 5 of 5Niaz B. Khan, Zainah B. Ibrahim, Mian Ashfaq Ali, Mohammed Jameel, Muhammad Ijaz Khan, Ahad Javanmardi and D.O. Oyejobi
Over the past few decades, the flow around circular cylinders has been one of the highly researched topics in the field of offshore engineering and fluid-structure interaction…
Abstract
Purpose
Over the past few decades, the flow around circular cylinders has been one of the highly researched topics in the field of offshore engineering and fluid-structure interaction (FSI). In the current study, numerical simulations for flow around a fixed circular cylinder are performed at Reynolds number (Re) = 3900 with the LES method using the ICEM-CFD and ANSYS Fluent tool for meshing and analysis, respectively. Previously, similar studies have been conducted at the same Reynolds number, but there have been discrepancies in the results, particularly in calculating the recirculation length and angle of separation. In addition, the purpose of this study is to address the impact of time interval averaging to obtain the fully converged solution.
Design/methodology/approach
This study presents the LES method, using the ICEM-CFD and ANSYS fluent tool for meshing and analysis.
Findings
In the current study, turbulence statistics are sampled for 25, 50, 75 and 100 vortex-shedding cycles with the CFL value O (1). The recirculation length, angle of separation, hydrodynamic coefficients and the wake behind the cylinder are investigated up to ten diameters. The drag coefficient and Strouhal number are observed to be less sensitive, whereas the recirculation length appeared to be highly dependent on the average time statistics and the non-dimensional time step. Similarly, the mean streamwise and cross-flow velocity are observed to be sensitive to the average time statistics and non-dimensional time step in the wake region near the cylinder.
Originality/value
In the current investigation, turbulence statistics are sampled for 25, 50, 75 and 100 vortex-shedding cycles with the CFL value O (1), using large eddy simulation method at Re = 3900 around a circular cylinder. The impact of time interval averaging to obtain the fully converged mean flow field is addressed. No such consideration is yet published in the literature.
Details
Keywords
Saznizam Sazmee Sinoh, Faridah Othman and Zainah Ibrahim
This paper aimed to identify critical success factors (CSFs) of building information modeling (BIM) implementation among architectural, engineering and construction (AEC) firms in…
Abstract
Purpose
This paper aimed to identify critical success factors (CSFs) of building information modeling (BIM) implementation among architectural, engineering and construction (AEC) firms in Malaysia using quantitative statistical methods.
Design/methodology/approach
A questionnaire survey was conducted on the population of all AEC firms in Malaysia to rank the relative importance of 15 success factors (SFs) for BIM implementation in the firm on a 5-point Likert scale. The sampling frame consisted of all members registered with the Construction Industry Development Board (CIDB) from which 184 responses were received. The distinction between SFs and CSFs was achieved by a normalized mean cutoff value. Principal component analysis (PCA) was used to determine the relative groupings of the CSFs and structural equation modeling (SEM) were used to examine the underlying relationships between the CSF groupings.
Findings
Results of this study validated 11 previously identified CSFs for successful implementation of BIM among Malaysian AEC firms. Non-technical factors such as management, leadership and coordination were found to have higher relevance compared to technical factors such as software and hardware. Ranking analysis of the CSFs found internal coordination factors to have more importance compared to external coordination factors. PCA revealed 4 principal components (PCs) from the 11 CSFs. Together, these four PCs explain 74.3% of the variance in the data. Also, six hypothesized relationships between these groupings were supported using PLS-SEM.
Research limitations/implications
This study found an interaction between internal and external coordination factors for the implementation of BIM. Future research could explore the dynamics of both intra- and inter-firm coordination, which may create an environment suitable for BIM implementation.
Practical implications
This study provides Malaysian AEC firms with a general strategy on how to approach the implementation of BIM within the firm. In addition, government initiatives should focus on increasing BIM competency of graduates entering the workforce. This can be achieved through the development of a national BIM curriculum. Apart from that, the implementation of BIM requires a radical shift in the traditional building delivery process, not just simply acquiring new software and hardware.
Originality/value
This study revealed that the interactions between different firms at the industry level can influence successful implementation of BIM at the firm level. CSFs for BIM implementation at the firm level have been extensively studied. However, few studies exist which explore the inter-firm collaborations at the industry level that facilitate successful BIM implementation.
Details
Keywords
Here, we examine the challenges to democratization in Bahrain, with a particular focus on how the recent 2011 Uprising has resulted in a deepening of authoritarianism. It is…
Abstract
Here, we examine the challenges to democratization in Bahrain, with a particular focus on how the recent 2011 Uprising has resulted in a deepening of authoritarianism. It is argued that the recent unrest has brought into sharp relief the absence of “quality” democracy in Bahrain, and that any form of democratic transition is dependent on the will of a conservative Al Khalifa-Saudi nexus. While the pro-democracy movement may have prompted minor concessions on the part of the government, the extent of the popular mobilization triggered the Al Khalifa regime’s authoritarian reflex, and they have reacted to throttle the Uprising by putting in place legislative, ideological, and political barriers to reform, which points not only to a current de-democratization, but also a lack of future democratization. In addition to arguing for the post-2011 undoing of democracy in Bahrain, this paper also points to two major barriers to future democratization; (1) a conservative, post-Independence Al Khalifa-Saudi coalition assisted by large military resources (2) protracted communal tension brought about by the government’s instrumentalization of sectarianism.
Details
Keywords
Indera Syahrul Mat Radzuan, Song Inho and Yahaya Ahmad
The purpose of this paper is to address the overarching question, which was whether the incentives programmes formulated for the community have been found to be suitable to the…
Abstract
Purpose
The purpose of this paper is to address the overarching question, which was whether the incentives programmes formulated for the community have been found to be suitable to the aspirations and needs of the local residents.
Design/methodology/approach
This study has resulted from the authors’ experience through conducting a survey with the local residents in three locations, namely the Bukchon Hanok Village located at Seoul metropolitan city; the Hahoe Village, Angdong and the Yangdong Village, Gyeongju; both the latter are located towards the west of the Korean peninsula in the Gyeongbuk-do Province. This study has hopefully tried to analyse the residents’ perception of the effectiveness of the current incentives policy by using the Bennett’s programme evaluation method.
Findings
Results show that there was a divergent direction between the current incentives policy and the local aspirations between sites. In most cases, the cultural heritage conservation has been found to be a catalyst to fulfil a heritage tourism advantage rather than to cater to the local community needs.
Originality/value
The paper is the first insightful study of the historic villages which attempts to draw out the importance of the effectiveness of the incentives programme in guiding the conservation efforts for the local economic development.
Details
Keywords
This study aims to provide a review of antecedents of destructive deviance and classify them into three levels, namely, personal, interpersonal and organizational level in the…
Abstract
Purpose
This study aims to provide a review of antecedents of destructive deviance and classify them into three levels, namely, personal, interpersonal and organizational level in the proposed integrated conceptual framework. Furthermore, it proposes three levels of interventions to prevent or modify destructive deviance.
Design/methodology/approach
Systematic literature review of the past 23 years was carried out for the current study to identify the antecedents of destructive deviance.
Findings
This study proposes an integrated conceptual framework incorporating three levels of antecedents and interventions for overcoming destructive deviance. Findings classified the antecedents of destructive deviance into three categories, namely, personal, interpersonal and organizational level variables. Similarly, the proposed interventions were classified into three levels, namely, individual (employee resilience, mindfulness), interpersonal (mentoring, peer support) and organizational-level interventions (talent management, internal corporate communication) that organizations should concentrate on to reduce destructive deviance and facilitate health and well-being of employees.
Practical implications
This study posits three-level interventions to reduce or transform negative characteristics and overcome the negative impact of interpersonal and organizational level antecedents on destructive deviance among employees. The suggested three-level interventions not only reduce the negative characteristics and transform negative behaviors but also lay a significant pavement for fostering positive emotions among employees.
Originality/value
This study classifies the antecedents of destructive deviance into three categories, namely, personal, interpersonal and organizational-level antecedents. Further, this study offers three-level interventions for overcoming destructive deviance among employees.
Details