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In many real-life situations ranging from financial to volcanic data, growth is described either by a power law – which is linear in log-log scale or by a quadratic dependence in the log-log scale. The purpose of this paper is to explain this empirical fact.

The authors use natural scale invariance requirements.

In this paper, the authors used natural scale invariance requirement to explain the ubiquity of quadratic log-log dependencies. The authors also explain what to do if quadratic log-log models turn out to be insufficiently accurate. In this case, scale-invariance requirements lead to dependencies which in the log-log scale take cubic, 4th order, etc. form.

To the best of authors’ knowledge, this is the first theoretical explanation of the empirical quadratic log-log dependence.

In many real-life situations, we do not know the exact values of the expected gain corresponding to different possible actions, we only have lower and upper bounds on these gains – i.e., in effect, intervals of possible gain values. The purpose of this study is to describe all possible ways to make decisions under such interval uncertainty.

The authors used both natural invariance and additivity requirements.

The authors demonstrated that natural requirements – invariance or additivity – led to a two-parametric family of possible decision-making strategies.

This is a first description of all reasonable strategies for decision-making under interval uncertainty – strategies that satisfy natural requirements of invariance or additivity.

This paper aims mainly at introducing applied statisticians and econometricians to the current research methodology with non-Euclidean data sets. Specifically, it provides the basis and rationale for statistics in Wasserstein space, where the metric on probability measures is taken as a Wasserstein metric arising from optimal transport theory.

The authors spell out the basis and rationale for using Wasserstein metrics on the data space of (random) probability measures.

In elaborating the new statistical analysis of non-Euclidean data sets, the paper illustrates the generalization of traditional aspects of statistical inference following Frechet's program.

Besides the elaboration of research methodology for a new data analysis, the paper discusses the applications of Wasserstein metrics to the robustness of financial risk measures.

This research aims to specialise in the investigation of risk management for service-oriented manufacturing supply chains via two stages, highlighting its differences from manufacturing. The research article is commenced by executing an encyclopedic review of earlier research to ascertain the distinctive traits of service-oriented manufacturing supply chains and identify prevalent risks. Secondly, an empirical study in the construction field, amongst the industry hardest struck in the mist of the COVID-19 epidemic, is conducted to thoroughly inspect the resonant effect of these risks on service-oriented manufacturing supply chain performance.

In this study, to validate the resonant effect mechanism, a thorough assessment is undertaken by juxtaposing theoretical model to a newly constructed comparative model that encompasses the single effects of risks on supply chain performance.

63% variance of service-oriented manufacturing supply chain performance was showcased by the resonant effect model, compared with 46.3% in the comparative model. Moreover, each risk exerts a more glaringly significant impact on supply chain performance, asserting the mechanism of the resonant influence. Another noteworthy result involves the demand risk possessing a low effect on supply chain performance, thus emphasising the superiority of service-oriented manufacturing supply chains.

Future research endeavours should hinge on the optimal “resonant” model explosion, thereby foreseeing and alleviating worst-case scenarios to guarantee the robustness and resilience of supply chain networks.

Indubitably, reducing the intensity of the resonant effect revolves around lowering the coefficient of “a,” thereby restricting/eliminating the link among risks. Therefore, the suggested resonant impact model might thus serve as “a road map”. In light of the aforementioned considerations, it is advisable that supply chain executives employ supply chain management tactics namely avoidance, prediction, and postponement, but only after meticulous consideration the costs and benefits of adopting such strategies.

The service-oriented manufacturing supply chain features and advantages have been analysed and explained throughout the article. The data gathered during the COVID-19 pandemic is a captivating and topical point of this paper.

To delve further into the phenomenon of psychological pressure on single mothers, the purpose of this paper is to explore the factors that affect the psychological state of single mothers in Vietnam.

Interpretative phenomenological analysis (IPA) interviews were conducted and analysed with the aim of understanding the psychological state of single mothers sampled from a social group in Vietnam.

Single mothers lack direct support needed to improve their confidence, job opportunities, income levels and social status. The absence of interventions increases the psychological pressure on single mothers in Vietnam.

A future study can explore the psychological state of single mothers using a more expansive data set.

Understanding the psychosocial and socio-economic risk factors of postpartum psychological pressure in single mothers may have important implications on preventative and support measures, as well as laying the groundwork for social protection interventions and informing welfare policy-making at a national level.

Social constructs in Vietnam compound the effect of postnatal depression on Vietnamese single mothers (in contrast to their counterparts in developed Western nations). This means that researchers and policymakers need to reconstruct stigmas that cause psychological pressures on single motherhood, and in doing so, help to change the view held about single motherhood.

This study is the first to explore psychological state of mothers in Vietnam using IPA.

Unsustainable logging and illegal logging for domestic and international trade and trafficking continue to lead to deforestation. It is crucial that Sustainable Development Goal 15 ‘Sustainably manage forests, combat desertification, halt and reverse land degradation, halt biodiversity loss’ is achieved to maintain the livelihoods of people and protect the planet. This is the case in Vietnam as well, where many people, including indigenous groups, rely on the forest for their survival. Drawing on semistructured interviews in Vietnam and a literature review, we investigate how the abuse of forest policies leads to human insecurity. From this, we propose solutions to (1) end unsustainable harvesting and illegal logging (SDG 15.7), (2) integrate the value of forests (culturally and economically) into national and local planning, the development process and poverty elimination strategies (SDG 15.9) and (3) improve the use of forest protection funding provided by international donors.

This study aims to explore the suitability and challenges of implementing fair value accounting (FVA) in Vietnam, an emerging/transitioning economy. While such implementation would enable convergence with International Financial Reporting Standards, standard setters and auditors have raised practical concerns about its adoption.

This qualitative study uses semi-structured interviews with regulators and auditors, together with an analysis of two fraud cases that illustrate the business environment in Vietnam. Public, private and capture theories guide the analysis.

The business and institutional environment in Vietnam creates several impediments to FVA being effectively implemented and transparently applied. Given the major challenges identified regarding the infrastructure necessary for this valuation system, the premature adoption of FVA may become a catalyst for corporate misconduct.

The findings are derived from data aggregated from two fraud cases and interviews, and as such, the results may not be generalisable to other settings. However, these findings may inform future research, particularly after the Ministry of Finance provides further guidance on the use of FVA in Vietnam.

A timely and critical examination of the challenges of implementing FVA in a transitioning economy is provided, and the two fraud cases reveal the complexities of the business environment in Vietnam.

This research gives voice to the tensions that developing countries are confronting as they seek to balance external pressures with internal constraints. The introduction of an assemblage of three theoretical lenses enables insights into contemporary issues associated with applying FVA in such settings.

This study examines the impact of perceived value, materialism and tourist intention on willingness to pay a premium for ecotourism (WTPP).

Data were collected and conducted in Vietnamese National Parks. The dataset consists of 927 valid responses by domestic travelers. Structural equation modeling (SEM) was used to test the proposed relationships among perceived value, materialism, tourist intention and tourists' WTPP.

This study found a significant positive effect of perceived value on both tourist intention and their WTPP. The results also indicated that materialism is revealed to have a totally negative influence on WTPP for ecotourism; its indirect effect is transmitted through tourist intention. These findings highlight that tourists are mainly attracted when they received unique information about eco-destination. Therefore, they tend to participate in ecotourism and decide to pay for ecotourism.

First, the study findings contribute strategies for tourism providers in their marketing activities by segmenting the target market which can be based on tourists with materialistic and nonmaterialistic. Second, ecotourism marketers need to focus on increasing the unique image of ecological sites. These efforts will create a favorable action for tourists. Third, ecotourism providers might increase the prospective customer base among consumers who have materialistic behaviors. Furthermore, they can provide ecotourism promotion materials for targeting customers. Finally, government needs to consider strategies designed to enhance the eco-destination places and environmental intention.

First, the study has not compared the efficacy of two different measures which are affective and cognitive items in perceived value construct. Second, this research does not discuss about the interrelationships among other factors influencing tourists' WTPP. Third, the customers' demographic characteristics in this study did not explore because the difference on gender may be perceived differently in analyzing advertising. Fourth, this study was conducted in Vietnam, not in different countries and other different cultures.

This study investigates the impact of perceived value and materialism on ecotourism intention and tourists' WTPP for ecotourism. This study reveals the understanding of how individuals' concern about the value of ecological sites and influences their intention to actual behavior in engaging ecotourism. Significant practical implications are also provided for ecotourism providers, marketers and government. In general, government needs to consider strategies designed to enhance the eco-destination places and environmental intention. Ecotourism marketers need to focus on increasing the unique image of ecological sites. These efforts will create a favorable action for tourists. Otherwise, ecotourism providers might increase the prospective customer base among consumers who have materialistic behaviors. Furthermore, they can provide ecotourism promotion materials for targeting customers.

The textile industry has consumed large quantities of water and discharged large volumes of wastewater in the dyeing process. The study aims to characterize self-dyed silk with Rhodamine B (RhB) for fashion applications to reduce textile hazards to the environment and increase the added value of silk.

Bombyx mori was fed with RhB-colored mulberry leaves (1500 ppm). The effects of self-dyeing were investigated via color strength K/S, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope, X-ray diffraction, tensile strength, color fastness to washing, rubbing, perspiration and light.

Self-dyed silk possesses effective coloration and impressive color fastness (4–5/5), higher crystalline index (CrI) (73.26 ± 2.28%), less thermal stability and tenacity, slight change in amino acid composition compared with the pristine and no existence of harmful aromatic azo amines and arylamine salts.

The application of self-dyed silk with RhB dye has expanded new technology into fashion industry, contributing partly to economic growth and adding value to silk in the global supply chain. Besides, the self-dyeing will yield practical values in the reduction of dyeing discharge in textile industry.

Self-dyed silk was characterized for textile applications in comparison with pristine silk in terms of color strength and fastness as well as determined its polymeric properties relating to crystallinity, morphology, chemical composition, tensile properties and thermal stability which have not been investigated before.

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.

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.

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.

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.

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.

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

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