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Article
Publication date: 3 May 2013

Nguyen Xuan Quyen, Vu Van Yem, Thang Manh Hoang and Kyandoghere Kyamakya

This paper presents and investigates a method named M×N‐ary chaotic pulse‐width‐position modulation (CPWPM) which is based on the combination of M‐ary chaotic pulse‐position…

Abstract

Purpose

This paper presents and investigates a method named M×N‐ary chaotic pulse‐width‐position modulation (CPWPM) which is based on the combination of M‐ary chaotic pulse‐position modulation (CPPM) and N‐ary chaotic pulse‐width modulation (CPWM) in order to provide a better performance in noise‐affected environments as well as improve significantly bit rate.

Design/methodology/approach

Analysis of schemes for modulator and demodulator are presented in detail through describing the schemes of the individual methods and their combination. Theoretical evaluation of bit‐error rate (BER) performance in presence of additive white Gaussian noise (AWGN) is provided. Chaotic behavior with tent map in variation of modulation parameters is also investigated. In order to verify the theoretical analyses, numerical simulations are carried out and their results are reported.

Findings

Both evaluation and simulation results show that when the number of symbols increases, the bit rate is improved significantly but the BER performance is just slightly worse. This makes M×N‐ary CPWPM become an effective method for chaos‐based digital communication.

Originality/value

Although CPPM, CPWM and M‐ary modulation methods have been described in the literature separately, their combination is presented and investigated for the first time in this paper.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 32 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 18 October 2021

Dang Manh Vu, Ngoc Thang Ha, Thi Viet Nga Ngo, Huong Thao Pham and Cong Doanh Duong

This study aims to integrate the perspective of consumer social responsibility with the theory of planned behavior to explore the impact of environmental corporate social…

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Abstract

Purpose

This study aims to integrate the perspective of consumer social responsibility with the theory of planned behavior to explore the impact of environmental corporate social responsibility (ECSR) initiatives on intention to buy environmentally friendly products among Vietnamese consumers. Also, the moderating role of gender on the associations of antecedents and green purchase intention is tested in this study.

Design/methodology/approach

The data of 823 consumers using the tool of the mall-intercept survey recruited from several big cities in Vietnam. Cronbach’s alpha and confirmatory factor analysis has been used to test the reliability and validity of scales; then, structural equation modeling and PROCESS approach was used to test the fitness of the research model, formulated hypotheses and the indirect associations.

Findings

This study presented that ECSR initiatives were strongly and positively correlated with attitude towards green products, subjective norms, perceived behavioral and green purchase intention. Perceived behavioral control was found to be a partial mediator in the link between ECSR initiatives and intention to engage in pro-environmental consumption while the meditating roles of attitude towards green products and subjective norms in this linkage were not statistically significant. Additionally, this study illustrated that the impacts of subjective norms, perceived behavioral control and ECSR initiatives on green purchase intention were stronger for females than males.

Practical implications

This study provides several useful insights for policymakers and administrators to foster pro-environmental behavior of consumers as well as to inspire corporate social responsibility (CSR) activities of firms.

Originality/value

Even though there is a growing interest in investigating the impacts of CSR activities on consumers’ purchase behaviors, there is a lack of studies considering the aspect of consumer social responsibility on their sustainable consumption behavior. There is a need to enrich one’s knowledge about the effect of ECSR initiatives on consumer’ green purchase intention.

Details

Social Responsibility Journal, vol. 18 no. 8
Type: Research Article
ISSN: 1747-1117

Keywords

Article
Publication date: 17 September 2019

Hai Hong Dinh

The purpose of this paper is to trace the way in which a popular ritual became one of Vietnam’s most important festivals, elevated as a celebration of national heroism and charts…

Abstract

Purpose

The purpose of this paper is to trace the way in which a popular ritual became one of Vietnam’s most important festivals, elevated as a celebration of national heroism and charts its gradual transformation in modern society.

Design/methodology/approach

This research focuses on the combination of a fertility rite and narratives of St Gióng based on nationalism or heroism created a special festival reflecting many traditional cultural characteristics of Vietnam and the Việt people and the transformation of St Gióng from a mythological to a national symbol of heroism in anti-invader history was recorded in texts.

Findings

The paper casts light on the mythologization and historicization of St Gióng in Vietnam’s particular historical context by decoding the Gióng symbol as a core element of the folktales and myths about St Gióng to understand the formation and development of St Gióng in the cultural history of Vietnam.

Research limitations/implications

The paper is not exploring the Gióng symbol within a larger cultural context of nationalism and ethnosymbolic approach in a comparison of national symbolism and heroism.

Practical implications

The paper includes implications for advised scholars to conduct further exploration of the symbol and myth of not only St Gióng in Vietnam but also Kubera in India and Vaisravana in China to connect Kubera, Vaisravana and St Gióng under the connection of literal myth and heroic symbol.

Social implications

The paper shows how processes of historicizing myth and mythologizing history are important features of Vietnamese socio-historical research.

Originality/value

The paper shows how a fertility rite became a historical festival and the figure of St Gióng became a symbol of patriotic heroism.

Details

Asian Education and Development Studies, vol. 9 no. 1
Type: Research Article
ISSN: 2046-3162

Keywords

Article
Publication date: 2 November 2021

Nguyen Thi Ngoc Ha, Eva Dakich and Susan Grieshaber

This article explores factors influencing the participation of industry professionals in Work-Integrated Learning (WIL) in three Vietnamese public universities. The impact of the…

Abstract

Purpose

This article explores factors influencing the participation of industry professionals in Work-Integrated Learning (WIL) in three Vietnamese public universities. The impact of the unique socio-cultural background of Vietnam on WIL is also addressed.

Design/methodology/approach

A qualitative approach that included three focus groups and 15 individual in-depth interviews was applied. In total, 30 key university and industry WIL stakeholders were involved. Thematic analysis was employed to identify enablers and inhibitors to the participation of industry professionals in WIL in Vietnamese universities.

Findings

Industry professionals faced more challenges than support when involved in WIL in three Vietnamese public universities. Four enablers of their participation in WIL stemmed from industry and nine inhibitors emerged from a variety of sources. The overwhelming number of inhibiting factors indicated difficulties associated with implementing WIL.

Originality/value

The rationale behind limited industry involvement in Vietnamese universities has not been explored previously. A holistic understanding of all key WIL stakeholders’ perceptions of factors influencing industry participation in a non-Western tertiary context may provide leads for higher education policy in Vietnam and add to the international literature.

Details

Higher Education, Skills and Work-Based Learning, vol. 12 no. 3
Type: Research Article
ISSN: 2042-3896

Keywords

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