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1 – 10 of 489Ngoc Le Chau, Ngoc Thoai Tran and Thanh-Phong Dao
Compliant mechanism has been receiving a great interest in precision engineering. However, analytical methods involving their behavior analysis is still a challenge because there…
Abstract
Purpose
Compliant mechanism has been receiving a great interest in precision engineering. However, analytical methods involving their behavior analysis is still a challenge because there are unclear kinematic behaviors. Especially, design optimization for compliant mechanisms becomes an important task when the problem is more and more complex. Therefore, the purpose of this study is to design a new hybrid computational method. The hybridized method is an integration of statistics, numerical method, computational intelligence and optimization.
Design/methodology/approach
A tensural bistable compliant mechanism is used to clarify the efficiency of the developed method. A pseudo model of the mechanism is designed and simulations are planned to retrieve the data sets. Main contributions of design variables are analyzed by analysis of variance to initialize several new populations. Next, objective functions are transformed into the desirability, which are inputs of the fuzzy inference system (FIS). The FIS modeling is aimed to initialize a single-combined objective function (SCOF). Subsequently, adaptive neuro-fuzzy inference system is developed to modeling a relation of the main geometrical parameters and the SCOF. Finally, the SCOF is maximized by lightning attachment procedure optimization algorithm to yield a global optimality.
Findings
The results prove that the present method is better than a combination of fuzzy logic and Taguchi. The present method is also superior to other algorithms by conducting non-parameter tests. The proposed computational method is a usefully systematic method that can be applied to compliant mechanisms with complex structures and multiple-constrained optimization problems.
Originality/value
The novelty of this work is to make a new approach by combining statistical techniques, numerical method, computational intelligence and metaheuristic algorithm. The feasibility of the method is capable of solving a multi-objective optimization problem for compliant mechanisms with nonlinear complexity.
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Thanh Tiep Le, Thoi Le Quan Chau, Quynh Phan Vo Nhu and João J.M. Ferreira
This research aims to shed light on the linkage between digital platforms and small and medium-sized enterprises (SMEs) performance and consider the moderating effect of…
Abstract
Purpose
This research aims to shed light on the linkage between digital platforms and small and medium-sized enterprises (SMEs) performance and consider the moderating effect of intellectual capital and environmental dynamism.
Design/methodology/approach
This study applies a quantitative approach using a sample of primary data from 508 managers and directors of Vietnamese SMEs, using structural equation modeling (SEM).
Findings
The utilization of digital platforms by managers and directors has a positive impact on enhancing intellectual capital. However, under the influence of external environment changes, this trend may shift towards a negative direction. The ability to utilize digital platforms, whether directly or through information communication, positively affects the performance of businesses. Research has shown that the positive promotion of digital platform capability for intellectual capital factors such as human capital, organizational capital, and relational capital decreases when the external environment changes in the context of uncertain globalization.
Originality/value
This research focuses on SMEs operating in the technology and e-commerce sectors and it evidences that digital platforms are an effective baseline driver for promoting high-performing SMEs. By examining the connection between digital platform’s capability and IC and the significance of intellectual capital for SMEs’ performance, this study adds to the body of literature already available on the destructive regulatory potential of environmental dynamism. This study broadens the dynamic capabilities theory’s outcome audience and adds a new dimension to the impact of the digital platform’s capability (resource utilization) on the performance of SMEs.
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Omotayo Olaleye Feyisetan, Fadi Alkaraan and Chau Le
This paper aims to investigate the influence of environmental, social and governance (ESG) on mergers and acquisitions (M&A) decisions/activities and organisational performance in…
Abstract
Purpose
This paper aims to investigate the influence of environmental, social and governance (ESG) on mergers and acquisitions (M&A) decisions/activities and organisational performance in UK – financial and non-financial firms over the period (2012–2022).
Design/methodology/approach
The theoretical lenses underpinning this study are rooted in stakeholder theory and resource-based theory. The empirical analysis is based on a sample of financial and non-financial firms selected from FTSE ALL-listed companies over the period (2012–2022).
Findings
Findings of this study reveal that ESG score has a statistically significant impact on both financial and non-financial firms. An increase in firm ESG performance significantly increases the likelihood of M&A. The results reveal that the impact of ESG on firm financial performance is negative and significant, but this is not the case for non-financial firms where the impact despite being positive is insignificant.
Research limitations/implications
This research was conducted using data from firms within the UK context. Future research may adopt or adapt the research questions in different context and settings. Future studies may adopt a case study approach or survey-based questionnaires or employ various theoretical lenses.
Practical implications
Findings of this study have managerial and theoretical implications. Integrating ESG into operational and strategic organisational activities enhances attractiveness to potential bidders and contributes to sustainable financial performance because acquiring targets with high ESG performance can have a positive effect on the acquirer’s post-merger market value, thereby strongly confirming the use of ESG as a value-enhancing strategy to promote corporate external growth.
Originality/value
Our findings add to the extant literature, a recent empirical evidence that, to the best of our knowledge, our this study is among the first to examine the influence of ESG on M&A and firm performance through comparison between the financial and non-financial sectors.
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Wei Wu, Chau Le, Yulu Shi and Fadi Alkaraan
Financial flexibility and investment efficiency are of vital importance in strategic choices at boardrooms, particularly in post-crisis recovery strategies. This study examines…
Abstract
Purpose
Financial flexibility and investment efficiency are of vital importance in strategic choices at boardrooms, particularly in post-crisis recovery strategies. This study examines the moderating effects of investment efficiency and investment scale on the relationship between financial flexibility and firm performance.
Design/methodology/approach
The authors use sample of 10,755 US-listed firms over the period 2010–2021 to examine the relationships between investment scale, investment efficiency, financial flexibility and firm performance. Particular attention is paid to overinvestment and underinvestment.
Findings
Findings of this study reveal that financial flexibility mitigates investment inefficiency through reducing overinvestment. Financial flexibility contributes to boost a firm’s accounting and market performance. Additionally, investment efficiency and investment scale have moderating effects on the relationship between financial flexibility and firm performance. However, the influence of investment efficiency is greater than the influence of investment scale. Finally, the authors find that the direct and indirect effects of financial flexibility are stronger on market performance than accounting performance, implying that market is more sensitive to corporate financial policies.
Research limitations/implications
Findings of this study have implications for scholars, decision-makers policymakers, investors and other stakeholders.
Practical implications
This study has its own limitations due to the sample selection issues, country context and the research model adopted by this study.
Originality/value
The novel contribution to the extant literature is incorporating the influence of investment scale and investment efficiency into the relationship between financial flexibility and firm performance.
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Wei Wu, Fadi Alkaraan and Chau Le
Financial flexibility, investment efficiency and effective corporate governance mechanisms have been issues of concern to stakeholders. Yet, little empirical evidence on the…
Abstract
Purpose
Financial flexibility, investment efficiency and effective corporate governance mechanisms have been issues of concern to stakeholders. Yet, little empirical evidence on the combined moderating effects investment efficiency and corporate governance mechanisms on the nexus between financial flexibility and firm performance. This study aims to address this gap and extend the extant literature by examining the moderating effects of corporate governance and investment efficiency on the nexus between financial flexibility and financial performance.
Design/methodology/approach
The empirical study is based on progression analysis using a sample of 13,865 US listed companies selected from BoardEx (WRDS) for the period (2010–2022) with 89,198 firm-year observations.
Findings
Findings of this study indicate that financial flexibility improves firm value as well as accounting performance. Furthermore, the results reveal that both investment efficiency and corporate governance moderate the effect of financial flexibility on firm performance. The authors complement and extend the literature on the optimal investment strategies domain by showing that the combined impact of corporate governance mechanisms and investment efficiency strengthens the nexus between financial flexibility and firm performance.
Research limitations/implications
Key limitations of this study due to the characteristics of the sample selection: country-specific context and proxies used by this study.
Practical implications
Findings of this study have managerial and theoretical implications for firms’ boardrooms, institutional and individual investors, regulators, academics and other stakeholders regarding behavioural aspects of investment decision-making.
Originality/value
The authors’ novel contribution to the extant literature is articulated by the conceptual framework underlying this study and by the new evidence regarding exploring the combined effect of corporate governance mechanisms on nexus between financial flexibility and companies’ performance.
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Canh Minh Nguyen, Bao Thai Pham and Duyen Thi Le Chau
This paper aims to explore the unintended effect of socially responsible human resource management (SRHRM) on employee task performance via three components of role stress: role…
Abstract
Purpose
This paper aims to explore the unintended effect of socially responsible human resource management (SRHRM) on employee task performance via three components of role stress: role conflict, role ambiguity and role overload.
Design/methodology/approach
Data was collected from 360 employees who were working in companies in the south of Vietnam and the study hypotheses were tested using structural equation modelling (SEM).
Findings
The results indicate that SRHRM increases role conflict, role ambiguity and role overload, which negatively affect employee task performance.
Practical implications
The key practical implication of our study is that SRHRM may decrease employee task performance via role conflict, role ambiguity and role overload. Managers should be aware of these findings and devise a plan to reduce the role stress that results from implementing SRHRM.
Originality/value
This study provides empirical evidence of the destructive consequences of SRHRM and contributes to a more complete perspective of how SRHRM affects employee performance.
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Tony de Souza-Daw, Robert Ross, Truong Duy Nhan, Le Anh Hung, Nguyen Duc Quoc Trung, Le Hai Chau, Hoang Minh Phuong, Le Hoang Ngoc and Mathews Nkhoma
The purpose of this paper is to present a low-cost, highly mobile system for performing street-level imaging. Street-level imaging and geo-location-based services are rapidly…
Abstract
Purpose
The purpose of this paper is to present a low-cost, highly mobile system for performing street-level imaging. Street-level imaging and geo-location-based services are rapidly growing in both popularity and coverage. Google Street View and Bing StreetSide are two of the free, online services which allow users to search location-based information on interactive maps. In addition, these services also provide software developers and researchers a rich source of street-level images for different purposes – from identifying traffic routes to augmented reality applications. Currently, coverage for Street View and StreetSide is limited to more affluent Western countries with sparse coverage throughout south-east Asia and Africa. In this paper, we present a low-cost system to perform street-level imaging targeted towards the congested, motorcycle-dominant south-east Asian countries. The proposed system uses a catadioptric imaging system to capture 360-degree panoramic images which are geo-located using an on-board GPS. The system is mounted on the back of a motorcycle to provide maximum mobility and access to narrow roads. An innovative backwards remapping technique for flattening the images is discussed along with some results from the first 150 km which have been captured from Southern Vietnam.
Design/methodology/approach
The design was a low-cost prototype design using low-cost off-the-shelf hardware with custom software and assembly to facilitate functionality.
Findings
The system was shown to work well as a low-cost omnidirectional mapping solution targeted toward sea-of-motorbike road conditions.
Research limitations/implications
Some of the pictures returned by the system were unclear. These could be improved by having artificial lighting (currently only ambient light is used), a gyroscope-stabilised imaging platform and a higher resolution camera.
Originality/value
This paper discusses a design which facilitates low-cost, street-level imaging for a sea-of-motorcycle environment. The system uses a catadioptric imaging approach to give a wide field of view without excessive image storage requirements using dozens of cameras.
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Artur Paździor, Wiesława Caputa and Izabela Krawczyk-Sokołowska
The Covid-19 pandemic and the war in Ukraine are a real example of how uncertainty can trigger radical changes in the socio-economic system on a macro and micro scale. The…
Abstract
Research background
The Covid-19 pandemic and the war in Ukraine are a real example of how uncertainty can trigger radical changes in the socio-economic system on a macro and micro scale. The indicated events contributed to the increase in the level of uncertainty, and its effects appeared in the real conditions of the functioning of international communities.
Purpose of the Chapter
The purpose of the chapter is to determine the impact of the Covid-19 pandemic and the war in Ukraine on the situation of Polish consumers and the resulting behaviour in the context of business–consumer relations.
Methodology
This goal was achieved through literature studies, analysis of changes in selected indicators of the economic situation and analysis of basic variables determining the relationships between consumers and suppliers.
Findings
The presented research results allow us to conclude that both the pandemic and war had an impact not only on the economic indicators but also the financial standing of households. We are seeing an increase in the differences between the nominal and real value of these incomes. Inflation is on the rise, forcing households to change their spending structure and look for savings. Of course, there have been and will be companies that do not have to be significantly affected by the effects of these events. In this group, companies related to the provision of IT infrastructure and specialising in establishing multidimensional relationships in the digital space should be pointed out.
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Even though austenitic stainless steels have been extensively used in industries, owing to some of the characteristics of the material, its performance in machining is difficult…
Abstract
Purpose
Even though austenitic stainless steels have been extensively used in industries, owing to some of the characteristics of the material, its performance in machining is difficult to understand, in particular at high cutting speeds. There is no availability of dependable and in-depth studies pertinent to this matter. In this work, performance of AISI 304 austenitic stainless steel was studied in terms of surface roughness (Ra) and material removal rate (MRR) at high cutting speeds. Subsequently, parametric optimization and prediction for responses were carried out.
Design/methodology/approach
Turning operations were conducted using L9 orthogonal array and the outcomes were analyzed to attain optimal set of machining parameters for the responses using signal-to-noise (S/N) ratio and Pareto analysis of variance (ANOVA). In the present work, the cutting speed values were considered beyond the recommended range as designated by tool manufacturers. Finally, multiple regression models were developed to predict responses.
Findings
From the results, 350 m/min was found to be a significant speed. The investigation reveals that even though the speeds are taken beyond the recommended values, the results are favorable. The optimal machining parameters values for surface quality obtained were cutting speed of 350 m/min, feed of 0.15 mm/rev and depth of cut of 2.0 mm. In case of MRR, the optimal values were: cutting speed of 400 m/min, feed of 0.25 mm/rev and depth of cut of 2.0 mm. It was found out that there was an improvement in Ra and MRR (around 15 and 4%) due to optimization. The results indicate that Pareto ANOVA is easier than S/N ratio. This revealed that the feed rate and depth of cut were mostly affected parameters for Ra and MRR. The developed models are capable of predicting the responses accurately.
Practical implications
The outcome of the work reveals that even though the speeds were taken beyond the recommended value, the results are favorable for manufacturing industries when the tool cost is considered insignificant.
Originality/value
No work was reported on machining of the chosen material beyond the recommended cutting speed. Moreover, it was observed from the past works that cutting speeds were limited to 100–300 m/min.
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