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The construction industry is unique but with uncertainties. This is because of the operating environment. This intricacy gives rise to several construction risks and is compounded in developing countries’ turbulent times. If not managed, these risks enhanced in turbulent times could negatively impact the Nigerian construction projects’ cost, time, quality, and performance. Hence, this study investigated the perceived encumbrances facing construction risk management techniques and identified measures to promote sustainable-based construction risk management in turbulent times.

The researchers adopted a qualitative approach and achieved saturation with 28 participants. The participants were government policymakers, quantity surveyors in government ministries/agencies/departments, consultant engineers, consultant architects, consultant and contracting quantity surveyors, and construction contractors knowledgeable about construction risk management. The research employed a thematic analysis for the study’s data.

Findings identified turbulent times related to the industry and major techniques for managing construction project risks in the Nigerian construction industry. It revealed lax adoption and implementation of practices. Also, the study identified major encumbrances facing construction risk and proffered initiatives that would promote sustainable-based construction risk management in turbulent times.

This study investigates encumbrances and suggests measures to promote construction project risk management in turbulent times in Nigeria. Also, the study contributes to the literature’s paucity, uncovering perceived encumbrances and evolving organisations’ management styles to imbed sustainable-based risk management practices by qualitative research design method.

The purpose of this study is to develop a model of a starting situation for relationship initiation in turbulent business networks.

The study is designed as an extreme single case study that takes its point of departure in a company’s bankruptcy in the Swedish automotive industry.

This study illustrates how a new business relationship can start from a resource combination previously controlled by one actor (i.e. a single company) in a turbulent business network, thereby bringing nuances to the common understanding that new relationships start in stable business networks where resource combinations are developed between actors in established business relationships.

Previous studies have stated that the development of a mutual orientation between actors leads to the formation of a business relationship. The business relationship then leads to resource adaptations between the two companies. The developed model, however, illustrates that this pattern can be reversed in situations of turbulence. Hence, previously adapted resources might lead to the formations of a business relationship. Based on this observation, the authors argue that there are reasons to question if previous models of business relationship initiation and development in business networks are adequately equipped for analysis in turbulent business networks.

Reynolds-averaged Navier–Stokes (RANS) models often perform poorly in shock/turbulence interaction regions, resulting in excessive wall heat load and incorrect representation of the separation length in shockwave/turbulent boundary layer interactions. The authors suggest that this can be traced back to inadequate numerical treatment of the inviscid fluxes. The purpose of this study is an extension to the well-known Harten, Lax, van Leer, Einfeldt (HLLE) Riemann solver to overcome this issue.

It explicitly takes into account the broadening of waves due to the averaging procedure, which adds numerical dissipation and reduces excessive turbulence production across shocks. The scheme is derived based on the HLLE equations, and it is tested against three numerical experiments.

Sod’s shock tube case shows that the scheme succeeds in reducing turbulence amplification across shocks. A shock-free turbulent flat plate boundary layer indicates that smooth flow at moderate turbulence intensity is largely unaffected by the scheme. A shock/turbulent boundary layer interaction case with higher turbulence intensity shows that the added numerical dissipation can, however, impair the wall heat flux distribution.

The proposed scheme is motivated by implicit large eddy simulations that use numerical dissipation as subgrid-scale model. Introducing physical aspects of turbulence into the numerical treatment for RANS simulations is a novel approach.

The purpose of the study is to examine how small and medium audit practices (SMPs) in emerging economies build and anchor on dynamic auditing capability to operate in a turbulent business environment occasioned by the Covid-19 pandemic.

The study adopts an exploratory qualitative methodology using qualitative data collected with the aid of an open-ended instrument. With the help of a qualitative data analysis software QSR NVivo9, data were analyzed following Gioia's methodology with a four-stage coding process that combines both a deductive and an inductive approach.

The findings of the study show that to manage operations during the Covid-19 pandemic, SMPs developed and anchored on dynamic auditing capabilities. Specifically, the findings show that this required transformation of existing operational capabilities, shiftiness, flexibility and innovativeness of the SMPs as well as leveraging networking and adaptive sub-capabilities.

The study produces a pioneer result of how to develop and anchor on the dynamic auditing capability by the SMP subsector of the audit industry to continue operations in a turbulent business environment the magnitude of the Covid-19 pandemic.

The purpose of the paper is to predict the aerodynamic performance of a complete scale model H-Darrieus vertical axis wind turbine (VAWT) with end plates at different operating conditions. This paper aims at understanding the flow physics around a model VAWT for three different tip speed ratios corresponding to three different flow regimes.

This study achieves a first three-dimensional hybrid lattice Boltzmann method/very large eddy simulation (LBM-VLES) model for a complete scaled model VAWT with end plates and mast using the solver PowerFLOW. The power curve predicted from the numerical simulations is compared with the experimental data collected at Erlangen University. This study highlights the complexity of the turbulent flow features that are seen at three different operational regimes of the turbine using instantaneous flow structures, mean velocity, pressure iso-contours, blade loading and skin friction plots.

The power curve predicted using the LBM-VLES approach and setup provides a good overall match with the experimental power curve, with the peak and drop after the operational point being captured. Variable turbulent flow structures are seen over the azimuthal revolution that depends on the tip speed ratio (TSR). Significant dynamic stall structures are seen in the upwind phase and at the end of the downwind phase of rotation in the deep stall regime. Strong blade wake interactions and turbulent flow structures are seen inside the rotor at higher TSRs.

The computational cost and time for such high-fidelity simulations using the LBM-VLES remains expensive. Each simulation requires around a week using supercomputing facilities. Further studies need to be performed to improve analytical VAWT models using inputs/calibration from high fidelity simulation databases. As a future work, the impact of turbulent and nonuniform inflow conditions that are more representative of a typical urban environment also needs to be investigated.

The LBM methodology is shown to be a reliable approach for VAWT power prediction. Dynamic stall and blade wake interactions reduce the aerodynamic performance of a VAWT. An ideal operation close to the peak of the power curve should be favored based on the local wind resource, as this point exhibits a smoother variation of forces improving operational performance. The 3D flow features also exhibit a significant wake asymmetry that could impact the optimal layout of VAWT clusters to increase their power density. The present work also highlights the importance of 3D simulations of the complete model including the support structures such as end plates and mast.

Accurate predictions of power performance for Darrieus VAWTs could help in better siting of wind turbines thus improving return of investment and reducing levelized cost of energy. It could promote the development of onsite electricity generation, especially for industrial sites/urban areas and renew interest for VAWT wind farms.

A first high-fidelity simulation of a complete VAWT with end plates and supporting structures has been performed using the LBM approach and compared with experimental data. The 3D flow physics has been analyzed at different operating regimes of the turbine. These physical insights and prediction capabilities of this approach could be useful for commercial VAWT manufacturers.

More than at any other period in human history, humankind is currently at the crossroads of war or peace, growth or decline, progress or regress, life or death, and hell or heaven. We cannot leave these opposite polarities and possibilities to politicians and bureaucrats, to chance and expediency. These are expressions of turbulent markets. We must design and invent, plan and predict, and monitor and control our future and that of our posterity. In this regard, the concept of human personhood cum human dignity and responsibility is a fundamental part of this new self-understanding and undertaking. Ethics and morality are critical components on this creative journey to destiny. Corporate ethics, in particular, requires the development of a clear understanding of the existential situation of turbulent markets – that is, the relationship between executive autonomy and freedom, between human creativity and innovation, and between human culture and corporate social responsibility. Other critical concepts such as accountability and moral responsibility, the ethics of rights and duties, the executive virtue of moral and ethical reasoning, the building of trusting and caring relationships, and the like will be discussed in subsequent chapters.

The paper refers to the framework of ambidexterity to explain the strategic paths of manufacturing SMEs in turbulent times, by investigating SMEs' strategic reaction to the COVID-19 pandemic.

The authors adopted an inductive approach methodology. Using a qualitative research method, Italian manufacturing SMEs in different industries were interviewed to outline how they have faced the negative effects of the COVID-19 by considering the strategies implemented during the pandemic.

The study identifies three ambidextrous strategies for manufacturing SMEs to positively overcome the COVID-19 crisis: (1) playing different roles within the same market (business-to-business and business-to-consumer) simultaneously, (2) simultaneous entrance and management of multiple markets and (3) exploiting manufacturing knowledge for exploring product and business model innovation (simultaneous learning processes).

Results enrich the theoretical discussion on ambidexterity and SMEs, by stressing the strategic dimension of ambidexterity and including a more fine-grained analysis of the different firm’ strategic paths in times of crisis.

The paper provides practical suggestions for manufacturing SMEs on how they can react during turbulent times and crises by implementing ambidextrous strategies also thanks to the use of digital technologies.

This paper contributes to outlining the conditions for SMEs' resilience in the international competitive context by highlighting the perspective of ambidexterity based on the analysis of multiple case studies from manufacturing industries.

The purpose of this paper is to present a fast and bare bones implementation of a numerical method for quickly simulating turbulent thermal flows on GPUs. The work also validates earlier research showing that the lattice Boltzmann method (LBM) method is suitable for complex thermal flows.

A dual lattice hydrodynamic (D3Q27) thermal (D3Q7) multiple-relaxation time LBM model capable of thermal DNS calculations is implemented in CUDA.

The model has the same computational performance compared to earlier publications of similar LBM solvers. The solver is validated against three benchmark cases for turbulent thermal flow with available data and is shown to be in excellent agreement.

The combination of a D3Q27 and D3Q7 stencil for a multiple relaxation time -LBM has, to the authors’ knowledge, not been used for simulations of thermal flows. The code is made available in a public repository under a free license.

The aim of this study is to study the relationship between halal certification and small and medium entreprise (SME) performance in a turbulent environment such as the Palestinian environment.

In this study quantitative cross-sectional research design using questionnaires distributed over 51 certified SME’s used, and analysis was performed using partial least squares-structural equational modeling.

The current study revealed that there is a positive relationship between certification and business performance of SME’s in terms of financial and operational performance, and operational performance can mediate the effect between certification and financial performance. It is recommended to conduct further research with larger sample sizes and conduct research using different research designs, such as the longitudinal research design.

Certification of Halal also has a positive relationship with performance, even in a turbulent environment like Palestine. Accordingly, Palestinian food manufacturing firms are called to implement food safety standards like the Halal certificate to gain beside the good gained image the good financial performance.

This study was conducted in one of the most turbulent environments, as well as in developing countries, enriching the literature with results from emerging/turbulence and developing countries.

Small- and medium-sized enterprises (SMEs) often operate in environments marked by high levels of turbulence. Such firms adopt digital technologies and platforms that provide access to external real-time information and establish digital connectivity between firms to remain competitive. This study aims to focus on SMEs’ downstream and upstream platform-based digital connectivity (PDC).

This study examines the effects of PDC on SMEs’ operational performance under conditions of environmental turbulence. The data was gathered from 192 SMEs operating in the manufacturing arena.

The results show that the adoption of PDC does not directly affect an SME’s operational performance. However, in highly turbulent environments, PDC can improve operational performance. The results indicate that the performance effects of PDC vary according to the level and type of environmental turbulence.

This research offers insights into the relationship between PDC among SMEs and operational performance and encourages future research examining other possible conditional effects that could explain the contradictory results found in previous research.

This study contributes to the knowledge of supply-chain digitalization among SMEs and its performance effects in varying environmental conditions. Further, this study contributes to the prior research by focusing on the interorganizational aspects of digitalization in SMEs.