Le Thi Hong Na and Jin-Ho Park
This paper focuses on the potential applications of eco-features in Vietnamese traditional folk houses to contemporary high-rise housing. One of the main characteristics of…
Abstract
This paper focuses on the potential applications of eco-features in Vietnamese traditional folk houses to contemporary high-rise housing. One of the main characteristics of traditional folk houses is that they are designed with a deep understanding of and respect for nature. This type of housing also expresses the way of life of its users, having evolved over generations while adapting to their needs, culture, and environment. Whereas the traditional Vietnamese houses can be an important source in the creation of a Vietnamese architectural identity, the design-with-nature approach and its unique characteristics are, however, scarcely found in the contemporary high-rise housing in Vietnam.
The objective of this research is to investigate the potential applications of eco-features in Vietnamese traditional folk houses to contemporary high-rise urban housing. Initially, this study examines the unique spatial characteristics of the traditional folk houses typical in northern Vietnam. In particular, four houses at the Duong Lam Village in northern Vietnam are reviewed. Some of the ecological design elements are extracted from the spatial composition of the typical Vietnamese folk houses in relation to the local climate conditions and the Vietnamese lifestyle (vernacular culture). Finally, this paper attempts to develop new housing models in urban Vietnam, employing the ecological elements learned from the preceding assessment.
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Khaled Hallak, Fulbert Baudoin, Virginie Griseri, Florian Bugarin, Stephane Segonds, Severine Le Roy and Gilbert Teyssedre
The purpose of this paper is to optimize and improve a bipolar charge transport (BCT) model used to simulate charge dynamics in insulating polymer materials, specifically…
Abstract
Purpose
The purpose of this paper is to optimize and improve a bipolar charge transport (BCT) model used to simulate charge dynamics in insulating polymer materials, specifically low-density polyethylene (LDPE).
Design/methodology/approach
An optimization algorithm is applied to optimize the BCT model by comparing the model outputs with experimental data obtained using two kinds of measurements: space charge distribution using the pulsed electroacoustic (PEA) method and current measurements in nonstationary conditions.
Findings
The study provides an optimal set of parameters that offers a good correlation between model outputs and several experiments conducted under varying applied fields. The study evaluates the quantity of charges remaining inside the dielectric even after 24 h of short circuit. Moreover, the effects of increasing the electric field on charge trapping and detrapping rates are addressed.
Research limitations/implications
This study only examined experiments with different applied electric fields, and thus the obtained parameters may not suit the experimental outputs if the experimental temperature varies. Further improvement may be achieved by introducing additional experiments or another source of measurements.
Originality/value
This work provides a unique set of optimal parameters that best match both current and charge density measurements for a BCT model in LDPE and demonstrates the use of trust region reflective algorithm for parameter optimization. The study also attempts to evaluate the equations used to describe charge trapping and detrapping phenomena, providing a deeper understanding of the physics behind the model.
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Noel Scott, Brent Moyle, Ana Cláudia Campos, Liubov Skavronskaya and Biqiang Liu
Viet Hoang Le, Hans-Jörg von Mettenheim, Stéphane Goutte and Fei Liu
The purpose of this paper is to analyze the market response of the aerospace and defense industry and the airline industry to the ongoing conflict between Ukraine and Russia based…
Abstract
Purpose
The purpose of this paper is to analyze the market response of the aerospace and defense industry and the airline industry to the ongoing conflict between Ukraine and Russia based on the sentiments from war-related news articles over the period from October 2021 to June 2022.
Design/methodology/approach
The study uses the news article database of Global Database of Events, Languages and Tone (GDELT) to create a new set of variables that reflect the news sentiment regarding war and conflict. By investigating the newly created sentiment variables in combination with traditional event study methodology, the authors seek to find out whether sentiment indicators can be helpful to rationalize the evolution of the different stock markets before and after the conflict.
Findings
The authors' results point out a significant negative impact of the war on the airline market and a positive impact on the defense market. The authors' study also introduces a new set of war-related news-based sentiment variables that is significant to explain the evolution of the two markets before and after the war. The relationships between this study's new set of variables and the performance of the two markets are also proven to be significantly impacted by the invasion.
Originality/value
To the best of the authors' knowledge, this is the first research to use the news sentiment related to the topic of war and conflict to explain the market movement of different industries during the Ukraine invasion.
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Trung Duc Nguyen, Lanh Kim Trieu and Anh Hoang Le
This paper aims to propose a dynamic stochastic general equilibrium (DSGE) model for the State Bank of Vietnam (SBV) to assess the response from the household sector to monetary…
Abstract
Purpose
This paper aims to propose a dynamic stochastic general equilibrium (DSGE) model for the State Bank of Vietnam (SBV) to assess the response from the household sector to monetary policy shocks through the consumption function. Moreover, the transmission from monetary policy to household consumption and income distribution is experimented with through the vector autoregression (VAR) model.
Design/methodology/approach
In this study, the authors used the maximum likelihood estimation to estimate the DSGE and VAR models with the sample from 1996Q1 to the end of 2021Q4 (104 observations).
Findings
The DSGE model’s results show that the response of the household sector is as expected in the theory: a monetary policy shock occurs that increases the policy interest rate by 0.29%, leading to a decrease in consumer spending of about 0.041%, the shock fades after one year. Estimates from the VAR model give similar results: a monetary policy shock narrows income inequality after about 2–3 quarters and this process tends to slow down in the long run.
Research limitations/implications
Based on the research results, the authors propose policy implications for the SBV to achieve the goal of price stability, and stabilizing the macro-economic environment in Vietnam.
Originality/value
The findings of the study have theoretical contributions and empirical scientific evidence showing the effectiveness of the implementation of the SBV’s monetary policy in the context of macro-instability, namely: flexibility, caution and coordination of different measures promptly.
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This chapter provides information on the development of Vietnamese education under the influence of global forces based on the analysis of relevant education research and policies…
Abstract
This chapter provides information on the development of Vietnamese education under the influence of global forces based on the analysis of relevant education research and policies using Wolhuter’s frameworks. In the process of coming up with ways to develop education in the face of different influences of globalization, besides having reactions with patterns commonly found in countries around the world, Vietnam also has responses that reflect its own political, sociocultural and economic characteristics. The state still plays a controlling role in education at all levels and many culture-related features that have existed throughout the country’s history have hardly changed, namely aspects related to teachers, learners and teaching and learning methods. To sustain its education in the globalized era, Vietnam must make more efforts in various aspects such as the link between education and employment, the logic of education objectives, the feasibility and appropriateness of curricula, quality of education, especially of higher education and equality in education for underprivileged groups.
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Le Nhat Hoang Tran, Laurent Gerbaud, Nicolas Retière and Hieu Nguyen Huu
Static converters generate current harmonics in power grids. For numerous studies, analytical frequency modeling is preferred to carry out their harmonic modeling in the context…
Abstract
Purpose
Static converters generate current harmonics in power grids. For numerous studies, analytical frequency modeling is preferred to carry out their harmonic modeling in the context of sizing by optimization. However, a design by optimization has to consider other constraints, e.g. modeling constraints and operating constraints. In this way, this paper aims to focus on applying an analytical frequency modeling on the sizing by optimization of an aircraft electrical power channel.
Design/methodology/approach
The paper aims to size a multiphysical system by optimization. In this way, the sizing of an aircraft electrical power channel by optimization has been carried out. The models of all the channel components are analytical. Specifically, the frequency model of the power electronics is based on Tran et al. (2016) and is made of equalities and inequalities. Due to this modeling choice, the optimization satisfies hundreds of constraints, such as modeling constraints and static converter operating constraints. Furthermore, transient constraints are only verified after optimization.
Findings
The difficulty is the modeling of the system by taking into account nonlinear implicit equations having several solutions. A solution is the addition of inequality constraints to the model to guide the implicit solving. Furthermore, this greatly helps the optimization algorithm to find the good operating mode of the static converter, at steady state. This aspect is indispensable to validate the sizing model.
Research limitations/implications
The number of the configurations per operating period of the static converters is defined a priori and limited.
Originality/value
The analytical model for the sizing is formulated as a constrained optimization problem. Its solving and the sizing by optimization are carried out by the same optimization algorithm.
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Vuong Tran, Giang Nguyen Hoang Le and Trang Le Thuy
In response to COVID-19 global outbreaks, Canada, and Australia, two favored destinations by international students, as the contexts of this essay, have enacted different…
Abstract
In response to COVID-19 global outbreaks, Canada, and Australia, two favored destinations by international students, as the contexts of this essay, have enacted different international education policies, which will be investigated through the narratives. The authors discuss transnationality and mobility as key terms in the internationalization of higher education (HE) studies through their experiences as three Vietnamese doctoral students in Canada and Australia. Transnationality is attended through a narrative of a Vietnamese returnee struggling with bringing unfamiliar knowledge of gender and sex education from the West into a Vietnamese HE context. Mobility is unpacked through stories of a Vietnamese doctoral student in Canada stuck in Vietnam due to the COVID-19 despite inviting policies from the Canadian government to international students. This experience is connected to another Vietnamese student’s experience in Australia about a controversial act to discourage international students from staying in Australia if they cannot support themselves during the pandemic. The authors’ stories are created and retold personally for introspective and contemplative reflections on what the authors have experienced and offer considerations for how transnationality and mobility in international and comparative education could be understood through education, equity, and inclusion.
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Hang Thi Thuy Le, Huy Viet Hoang and Nga Thi Hang Phan
This study investigates the impact of the COVID-19 pandemic on financial stability in Vietnam, a developing country characterized by a bank-based financial system.
Abstract
Purpose
This study investigates the impact of the COVID-19 pandemic on financial stability in Vietnam, a developing country characterized by a bank-based financial system.
Design/methodology/approach
Using a sample of daily data from January 23, 2020 to June 30, 2022, the VECM and NARDL models are employed to study Vietnam’s financial stability in face of the COVID-19 disaster. Following the literature on COVID-19, the authors measure the impact of the pandemic by the number of daily infected cases and the national lockdown. Given the reliance of the Vietnamese government on the banking system to regulate the economy, the authors evaluate financial stability from the interbank market and stock market perspectives.
Findings
The authors find that the pandemic imposes a destructive effect on financial stability during the early time of the pandemic; however, the analysis with an extended period indicates that this effect gradually fades in the long term. In addition, from the NARDL results, the authors reveal an asymmetric relationship between the financial market and the COVID-19 pandemic in both short term and long term.
Research limitations/implications
An implication drawn from this study is that unprecedented health disasters should be resolved by unprecedented stringent countermeasures when conventional methods are ineffective. Although rigorous remedies may increase short-term liabilities, their implementation quickly ceases disease diffusion and helps an economy enter the recovery stage in a timelier manner.
Originality/value
The study is the first to examine the impact of the COVID-19 pandemic on financial stability, via the interbank market lens, in a developing country that relies on the bank-based financial system.
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Le Van Huy, Hien T.T. Nguyen, Phan Hoang Long, Phan Quyen Phu Thi and Nhat Tan Pham
By anchoring on the ability-motivation-opportunity (AMO) framework, this research aims to examine the effect of tourists' green ability, motivation and opportunity to access green…
Abstract
Purpose
By anchoring on the ability-motivation-opportunity (AMO) framework, this research aims to examine the effect of tourists' green ability, motivation and opportunity to access green information on digital media platforms (green AMO) on their intention to stay at green hotels. The study also tests the moderating role of environmental concern and the mediating role of green attitude in this relationship.
Design/methodology/approach
An online survey was conducted on large Facebook groups and by an international tour operator in March 2022. Through convenience sampling, 600 responses were collected from local and international tourists. Partial least squares structural equation modeling was performed to validate the research model.
Findings
The results reveal that tourists' intention to stay at green hotels is positively affected by their green AMO through indirect and direct channels. Specifically, green AMO indirectly effects tourists' intention to stay at green hotels by raising their green attitude. The results also indicate that the direct effect is moderated by environmental concern.
Research limitations/implications
The findings demonstrate the importance of facilitating tourists' access to environmental information on social media platforms, which enhances green attitude and intention to stay at green hotels. This study also proposes practical solutions that managers of green hotels can employ to target green-oriented customers and conduct environmental campaigns on digital platforms.
Originality/value
The research is the first to investigate the effects of tourists' green AMO on their intention to stay at green hotels. It is also the first to explore the roles of environmental concern and green attitude in this relationship.