Ahmed K. Abdelmoety, Taha H.A. Naga and Youssef F. Rashed
This paper aims to develop a new isogeometric boundary element formulation based on non-uniform rational basis splines (NURBS) curves for solving Reissner’s shear-deformable…
Abstract
Purpose
This paper aims to develop a new isogeometric boundary element formulation based on non-uniform rational basis splines (NURBS) curves for solving Reissner’s shear-deformable plates.
Design/methodology/approach
The generalized displacements and tractions along the problem boundary are approximated as NURBS curves having the same rational B-spline basis functions used to describe the geometrical boundary of the problem. The source points positions are determined over the problem boundary by the well-known Greville abscissae definition. The singular integrals are accurately evaluated using the singularity subtraction technique.
Findings
Numerical examples are solved to demonstrate the validity and the accuracy of the developed formulation.
Originality/value
This formulation is considered to preserve the exact geometry of the problem and to reduce or cancel mesh generation time by using NURBS curves employed in computer aided designs as a tool for isogeometric analysis. The present formulation extends such curves to be implemented as a stress analysis tool.
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Tan Vo-Thanh, Huan Minh Nguyen, Triet Minh Nguyen, Danh Cong Pham and Hung Phuc Nguyen
This study aims to examine the relationships among fear of COVID-19, job stress, job commitment and intention to quit. It also investigates the boundary conditions of the impact…
Abstract
Purpose
This study aims to examine the relationships among fear of COVID-19, job stress, job commitment and intention to quit. It also investigates the boundary conditions of the impact of fear of COVID-19 on job stress and intention to quit, a research gap that has not been addressed yet.
Design/methodology/approach
This research focused on full-time frontline hotel employees who have been working in four- and five-star hotels in Ho Chi Minh City, Vietnam. A pilot test was performed before collecting formal data. The survey was conducted face-to-face on site so that any potential confusion could be clarified right away. 487 valid responses were analyzed using SPSS 28 and SmartPLS 4.
Findings
The majority of hypotheses were supported, with the results suggested that supervisor support contributes to reducing the tendency of hotel employees to quit their job and their job stress. Besides, government support is necessary to make staff feel secure during the pandemic.
Practical implications
This study contributes to pointing out central priorities in making decisions by hotel managers when facing crises. Managers need to focus more on measures to help their employees feel secure and should be available for guidance and feedback when nedeed. Additionally, supportive policies from the government, especially financial support, can provide hotel employees with resources they need to maintain a basic level of living in the face of a severe drop in their income. The study provides the hotel industry not only in Vietnam but also in countries with comparable settings with strategies to cope with unexpected events.
Originality/value
Research on intention to quit a job has mainly focused on a complex interplay of internal factors. However, the influence of fear of COVID-19 on intention to quit a job has not been studied in the context of Vietnamese hotel industry yet. During the COVID-19 pandemic, a number of hotels in Vietnam had to close due to a lack of visitors, which had a negative impact on human resources. Accordingly, fear, stress, commitment and intention to quit a job are the issues faced by staff.
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Thu Trang Thi Ngo, Hong Quan Nguyen, Timothy Gorman, Quang Ngo Xuan, Phuong Lan Thi Ngo and Ann Vanreusel
Drought and salinity intrusion aggravated by climate change threaten agricultural livelihoods in Viet Nan's Mekong Delta. In response, authorities have built water management…
Abstract
Purpose
Drought and salinity intrusion aggravated by climate change threaten agricultural livelihoods in Viet Nan's Mekong Delta. In response, authorities have built water management infrastructure for irrigation and salinity protection. This study assessed the impact of one such project, the Ba Lai dam in Ben Tre province, on the livelihoods of aquaculture farmers.
Design/methodology/approach
This study uses the Sustainable Livelihoods Framework to assess the impact of the Ba Lai dam on the livelihood capitals of 18 farming households in four communes, located both upstream and downstream of the dam.
Findings
The authors find that, apart from some positive effects, the dam has also brought negative environmental consequences, such as increased water pollution. The authors also find that farmers have responded to the changes by adapting their livelihood practices.
Research limitations/implications
The samples were relatively small, encompassing four communes in Ben Tre province. On the other hand, this case study is instructive to the many ongoing infrastructure projects in the Vietnamese Mekong Delta.
Social implications
The project have caused an increase in water-related social conflict.
Originality/value
The case of the Ba Lai dam provides a cautionary example for infrastructure-based water management plans, both in Viet Nam and more broadly. The study suggests the need to strengthen community participation and prioritize impacts of farmers' capital assets when constructing water management infrastructure for climate change adaptation.
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Nguyen Thi Hanh Nguyen and Hung Thanh Dang
The purpose of this paper is to show the adaptation of participatory concept: “from passive to active community” which is the key point to achieve successes of the case study…
Abstract
Purpose
The purpose of this paper is to show the adaptation of participatory concept: “from passive to active community” which is the key point to achieve successes of the case study project – a cultural village in Tam Thanh, Tam Ky, Quang Nam, Vietnam. Its achievements result from the employment of three principal steps including identifying core issues in the community, creating changes in human perceptions and living conditions, and demanding operation and maintenance of the community further. The project can seem to be an outstanding showcase for the applicability and possibility of other community projects around Vietnam.
Design/methodology/approach
The paper uses the previous community projects developed in Vietnam. However, they are less effective for the community in long-term due to ignoring/underestimating the role of local people. The case study is an impoverished residential neighbourhood in Tam Thanh, Quang Nam. The authors along with the colleagues observed and conducted the workshops on site to understand the problems, values and expectations of people and the land. The paper likes as a summary for achievements and lessons extracted from that field study. The comparison to the previous projects shows the efficiency of participatory design with the active involvement of the local community.
Findings
The practical experiences to find successes for the community projects in Vietnam: collaboration of experts, architects, volunteers and local people; classification of roles for groups of participants; the involvement of the local government. engagement of a collaborative relationship with the community under the patience, comprehension and sympathy of all members of the community; and role of the architects involving the projects should be supported for people’s participation to come up with the idea instead of proposing strict ideas.
Practical implications
The appropriate approaches on the right subjects and right time are the key of successes and sufficiency for the community projects, particularly to the impoverished neighbourhoods or places with sensitive issues. The Tam Thanh village is a typical example and its experiences can be disseminated for the other projects. It indicates the active and respectful involvement of like-minded people (experts, volunteers, sponsors, managers and in particular local people) is very important to achieve the final expected destination in the purpose for/by/with the community.
Social implications
The huge effect of community projects is directly on the local people. The approaching and understanding them is challenging. An achievable community project is that the real needs of the people are provided; they are aware of their roles and benefits; and finally, the values are retained and developed sustainably in long term. The community projects are characterised by the participation of many people in many different stages: analysis, design and implementation. Therefore, for the experts, volunteers and managers, they learn to listen to the voice of the local people and to avoid the forced thoughts and underestimation of local people’s involvement.
Originality/value
The value of the study is that the nature of participatory design method is shown through activities and results of the community project in Tam Thanh. The delivery from theoretical features to practical works is not easy and needs observation and understanding of local culture and life. Depending on each specific location, the application of this design theory is flexible and adaptive. An idea for every project is initiation; however, the participation of local people is key to the project’s achievement.
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Ba-Phu Nguyen, Ananta Man Singh Pradhan, Tan Hung Nguyen, Nhat-Phi Doan, Van-Quang Nguyen and Thanh-Canh Huynh
The consolidation behavior of prefabricated vertical drain (PVD)-installed soft deposits mainly depends on the PVD performance. The purpose of this study is to propose a numerical…
Abstract
Purpose
The consolidation behavior of prefabricated vertical drain (PVD)-installed soft deposits mainly depends on the PVD performance. The purpose of this study is to propose a numerical solution for the consolidation of PVD-installed soft soil using the large-strain theory, in which the reduction of discharge capacity of PVD according to depth and time is simultaneously considered.
Design/methodology/approach
The proposed solution also takes into account the general constitute relationship of soft soil. Subsequently, the proposed solution is applied to analyze and compare with the monitoring data of two cases, one is the experimental test and another is the test embankment in Saga airport.
Findings
The results show that the reduction of PVD discharge capacity according to depth and time increased the duration required to achieve a certain degree of consolidation. The consolidation rate is more sensitive to the reduction of PVD discharge capacity according to time than that according to the depth. The effects of the reduction of PVD discharge capacity according to depth are more evident when PVD discharge capacity decreases. The predicted results using the proposed numerical solution were validated well with the monitoring data for both cases in verification.
Research limitations/implications
In this study, the variation of PVD discharge capacity is only considered in one-dimensional consolidation. However, it is challenging to implement a general expression for discharge capacity variation according to time in the two-dimensional numerical solution (two-dimensional plane strain model). This is the motivation for further study.
Practical implications
A geotechnical engineer could use the proposed numerical solution to predict the consolidation behavior of the drainage-improved soft deposit considering the PVD discharge capacity variation.
Originality/value
The large-strain consolidation of PVD-installed soft deposits could be predicted well by using the proposed numerical solution considering the PVD discharge capacity variations according to depth and time.
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Phuoc Hong Nguyen, Long Thanh Nguyen and Linh Tran Cam Nguyen
This study applies the target similarity model to examine the effects of servant leadership on supervisor commitment and supervisor citizenship behavior. The mediating role of…
Abstract
Purpose
This study applies the target similarity model to examine the effects of servant leadership on supervisor commitment and supervisor citizenship behavior. The mediating role of supervisory commitment is explored to determine the relationship between servant leadership and supervisor citizenship behavior. The difference in supervisor gender is examined in the linkage between servant leadership and supervisory commitment.
Design/methodology/approach
The data were collected through a survey of 478 salespeople in the retail industry. Structural equation modeling (SEM) techniques were used to verify the hypotheses of this study.
Findings
The findings showed significant support for the direct and indirect effects of servant leadership on supervisor commitment and supervisor citizenship behavior. Furthermore, the positive relationship between servant leadership and supervisory commitment was stronger among female supervisors than male supervisors.
Originality/value
Due to the scarcity of studies conducted on the linkages of servant leadership, supervisory commitment and supervisory citizenship behavior, this study theoretically and empirically contributes to the leadership literature as it is the first study to investigate these direct and indirect relationships. Similarly, this study examined gender differences in servant leadership to fill the gap in the research field.
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Cuong Thanh Nguyen, Phan Thanh Hai and Huyen Khanh Nguyen
This paper aims to explore the influence of the COVID-19 outbreak and the Government's disease control measures on the stock returns and liquidity of Vietnam-listed companies in…
Abstract
Purpose
This paper aims to explore the influence of the COVID-19 outbreak and the Government's disease control measures on the stock returns and liquidity of Vietnam-listed companies in the financial services sector.
Design/methodology/approach
The authors have conducted a panel data regression analysis using data from 50 banking, insurance and finance companies listed in Vietnam's two biggest stock exchanges (HNX and HOSE) within the period from January 30th, 2020 to May 15th, 2021.
Findings
The regression results indicate that the daily growth in the total number of confirmed cases caused by COVID-19 has significant negative effects on the stock market returns and liquidity. Nevertheless, the Government's imposition of lockdown yields significant and positive outcomes on stock performance. In addition, the study reveals remarkable differences in returns of large-cap and small-cap stocks under the impact of the COVID-19 pandemic.
Research limitations/implications
The study indicates government and regulators should act more actively to limit the outbreak of the virus, improve investor confidence as well to support the financial services industry and deal with the outbreak of the pandemic later.
Originality/value
This is the first study to explore the influence of the COVID-19 outbreak and the Government's disease control measures on the stock returns and liquidity of Vietnam-listed companies in the financial services industry.
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Keywords
Cong Doanh Duong, Thanh Hieu Nguyen, Thi Viet Nga Ngo, Tung Dao Thanh and Nhat Minh Tran
While the application of blockchain technology in the organic food supply chain has been increasingly recognized, the extant knowledge of how blockchain-driven traceability…
Abstract
Purpose
While the application of blockchain technology in the organic food supply chain has been increasingly recognized, the extant knowledge of how blockchain-driven traceability influences consumer perceptions and purchase intentions remains underexplored. Grounded in the stimulus-organism-response theory, this study aims to construct a moderated mediation model to examine blockchain-enabled traceability’s direct and indirect impacts on organic food purchase intention through perceived blockchain-related information transparency, considering the moderating role of blockchain-based trust.
Design/methodology/approach
A purposive sample of 5,326 Vietnamese consumers was surveyed using the PROCESS macro to test the proposed hypotheses.
Findings
The findings indicate that blockchain-enabled traceability significantly enhances perceived blockchain-related information transparency, which positively influences organic food purchase intention. Furthermore, blockchain-based trust was found to positively moderate both the direct effect of transparency on purchase intention and the indirect impact of traceability on purchase intention through transparency.
Practical implications
Practical and managerial insights for stakeholders in the organic food sector are also discussed.
Originality/value
These results contribute to the literature by extending the stimulus-organism-response model to the context of blockchain technology in supply chains and highlighting the critical role of trust in moderating the effectiveness of technological innovations.
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Tan Hai Dang Nguyen, Nicholas Chileshe, Raufdeen Rameezdeen and Anthony Wood
The purpose of this paper is twofold: first, to investigate strategies that external stakeholders can employ to affect construction project outcomes and, second, to identify…
Abstract
Purpose
The purpose of this paper is twofold: first, to investigate strategies that external stakeholders can employ to affect construction project outcomes and, second, to identify essential requirements for utilising each strategy.
Design/methodology/approach
A new theoretical framework of stakeholder influence strategies was proposed and applied. The research design is a multi-case study, comprising four cases in the construction industry in Vietnam.
Findings
Seven specific strategies were found, including inputs withholding, inputs compromising, communication, direct action, coalition building, conflict escalation and credibility building. When possessing project inputs, stakeholders can affect a project directly via a withholding or compromising strategy. Communication is available to those who have basic communicating skills; however, direct action is only employed by groups that include a large number of members. Objectors must have common interests or goals with their potential allies for using coalition building. Conflict escalation is restricted to communities having distinctive characteristics which can be used to create new problems sensibly, while credibility building is used by parties possessing adequate resources and expertise.
Research limitations/implications
This study’s generalisability may be limited by the main source of data and the types of projects in the selected cases.
Practical implications
This study provides directions for project managers to predict stakeholder influence by taking project inputs and utilisation requirements of the strategies into consideration.
Originality/value
This study is one of the first investigations on stakeholder-attributes-related requirements for utilising influence strategies in projects.
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Tien Dung Luu, Lan Anh Trinh, Thanh Phuong Binh Nguyen, Ngoc Linh Chi Ngo, Nguyen Phuong Nhi Le and Nhat Vi Vu
This study aims to analyse the impact of the degree of internationalisation (DOI) on firm performance (FP), with the moderating role of organisational slack resources, namely…
Abstract
Purpose
This study aims to analyse the impact of the degree of internationalisation (DOI) on firm performance (FP), with the moderating role of organisational slack resources, namely, absorbed slack human resources, absorbed financial slack resources and unabsorbed slack resources, in the context of Asian emerging markets.
Design/methodology/approach
Data includes 45 companies and 225 observations in 2014–2018. The authors adopted the generalised least squares method to test their hypotheses.
Findings
DOI negatively influences FP, indicating that the link between DOI and FP is not U-shaped but relatively linear. Absorbed human resources and absorbed slack financial resources significantly enhance FP, absorbing resources associated with DOI and FP. Unabsorbed slack resources play a minor role in mitigating the deleterious impact of DOIs on FP.
Practical implications
Firms in an emerging market should begin exploring and expanding into overseas markets with characteristics similar to the domestic market. The firm should optimise the benefits of slack resources by appropriately allocating resources to strategic operations.
Originality/value
This study reveals the beneficial effect of organisational slack resources on the DOI-FP relationship via the lens of the resource-based view.