ORCID Profile
0000-0001-7757-6225
Current Organisation
Hue University, College of Economics
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Publisher: Informa UK Limited
Date: 24-04-2023
Publisher: Firenze University Press
Date: 29-06-2023
DOI: 10.36253/JAEID-13966
Abstract: The vulnerability assessment of small-scale households on the central coast of Vietnam has been inadequate despite the apparent impacts of climate change. This knowledge gap presents challenges for identifying at-risk in iduals and communities and could impede effective public policy and resource allocation for adaptation efforts. To address this issue, this study employed the Livelihood Vulnerability Index referencing IPCC definitions (LVI-IPCC) framework to examine livelihood vulnerability and its determinants among 455 small-scale households in the coastal areas of Phu Vang district, Thua Thien Hue province, Vietnam. The LVI-IPCC calculation utilized a database of 11 major and 33 sub-indicators collected through a household survey conducted in 2021. The findings revealed that these households exhibit moderate vulnerability to natural disasters and climate shocks, as reflected by their high sensitivity index scores. Additionally, the study identified a persistent cycle of poverty and livelihood vulnerability among coastal communities, wherein poverty and reliance on nature-based income serve as the root cause of the exposure and a gateway to this loop. This study strongly advocates for a pro-poor approach that places poverty alleviation at the forefront of community development planning and climate change agendas. Under this approach, developing value chain models in agriculture and aquaculture and ersifying livelihoods through activities such as community-based tourism is highly recommended.
Publisher: MDPI AG
Date: 06-09-2022
DOI: 10.3390/SU141811162
Abstract: The objective of this study is to examine the impact of land fragmentation in rice production on household food insecurity in Vietnam. This study provides the first evidence on the effect of land fragmentation on household food insecurity in rice production. This study uses a relatively rich panel dataset of rice farming households across different regions from the Vietnam Access to Resources Household Survey (VARHS) 2012, 2014, and 2016. The research applies the ordered probit model to identify land fragmentation and other factors affecting household food insecurity at different food insecurity levels. Findings indicate that land fragmentation and rice seed types are positively correlated with household food insecurity. Importantly, the odds of an increase of 1% fragmentation land index increase the probability of household food insecurity at a very high level of 4.79% after controlling for unobserved heterogeneity. Other factors such as total cultivated area, access to credit, and household savings help reduce household food insecurity. These findings suggest that the government needs to foster the process of consolidating fragmented rice plots to help households produce efficiently and reduce food insecurity for their families. In addition, other approaches such as increasing farm size for each rice farmer and access to credit can increase the probability of food security for rural households in Vietnam.
Publisher: Springer Science and Business Media LLC
Date: 21-05-2022
Publisher: No publisher found
Date: 2021
Publisher: MDPI AG
Date: 26-10-2023
DOI: 10.3390/SU152115342
Publisher: MDPI AG
Date: 03-01-2023
DOI: 10.3390/ECONOMIES11010010
Abstract: A nationwide survey of 162,738 firms in Vietnam asked firms to report the impact of the COVID-19 pandemic on the health of the business, coping strategies used, and various firm and situational characteristics. More than 80% of firms reported negative impacts from the pandemic with fewer than 4% reporting positive effects 63% of the firms adopted at least one coping strategy. The coping strategies were categorized into seven groups as follows: (1) Non-adoption, (2) promoting e-commerce, (3) transforming key products/services, (4) training employees to improve professional qualifications, (5) finding new markets for input materials, (6) finding markets for products outside of the traditional market, (7) producing new products/services according to market demand during the epidemic period, and (8) other strategies. A multinomial logit regression model showed statistically significant associations between a firm’s selected coping strategy and several independent variables, as follows: (1) Firm size, (2) impact of the pandemic on firm health, firm access to inputs, and firm access to domestic markets, (3) decrease in firm revenue, and (4) receipt of government support. However, many businesses have not implemented coping strategies, leading to concerns regarding their resilience to upcoming threats and uncertainties.
Publisher: Wiley
Date: 19-03-2021
Abstract: Epithelial–mesenchymal transition (EMT) describes an evolutionary conserved morphogenic process defined by loss of epithelial characteristics and acquisition of mesenchymal phenotype, and altered patterns of intercellular communication, leading to functional changes in cell migration and invasion. In this regard, we have previously reported that oncogenic H‐Ras induced EMT in Madin‐Darby Canine Kidney (MDCK) cells (21D1 cells) trigger changes in the protein distribution pattern in cells, exosomes, and soluble protein factors (secretome) which modulate the tumor microenvironment. Here, we report that shed microvesicles (also termed microparticles/ectosomes) secreted from MDCK cells following oncogenic H‐Ras‐induced EMT (21D1‐sMVs) are biochemically distinct from exosomes and parental MDCK‐sMVs. The protein spectra of RNA‐binding proteins and mitochondrial proteins in 21D1‐sMVs differ profoundly compared to those of exosomes, likewise proteins associated with suppression of anoikis. We show that 21D1‐sMVs promote cell migration, confer anchorage‐independent growth, and induce EMT in parental MDCK cells. An unexpected and novel finding was the selective sorting of tissue transglutaminase‐2 (TGM2) into 21D1‐sMVs there was no evidence of TGM2 in MDCK‐sMVs. Prior treatment of 21D1‐sMVs with neutralizing anti‐TGM2 or anti‐FN1 antibodies attenuates the invasive capability of fibroblasts. These finding suggest that microvesicle‐associated TGM2 may play an important contributory role in the EMT process and warrants further investigation.
Publisher: Wiley
Date: 22-11-2022
Abstract: Metasurfaces supporting optical bound states in the continuum (BICs) are emerging as simple and compact optical cavities to realize polarization-vortex lasers. The winding of the polarization around the singularity defines topological charges which are generally set by the cavity design and cannot be altered without changing geometrical parameters. Here, a subwavelength-thin phase-change halide perovskite BIC metasurface functioning as a tunable polarization vortex microlaser is demonstrated. Upon the perovskite structural phase transitions, both its refractive index and gain vary substantially, inducing reversible and bistable switching between distinct polarization vortexes underpinned by opposite topological charges. Dynamic tuning and switching of the resulting vector beams may find use in microscopy imaging, particle trapping and manipulation, and optical data storage.
Publisher: World Scientific Pub Co Pte Ltd
Date: 22-08-2023
DOI: 10.1142/S2382624X23500066
Abstract: This study utilized the contingent valuation method to estimate the value of water-related ecosystem services (ES) in Vietnam, focusing on provisioning and regulating services for addressing water scarcity (WS) in rice farming. By incorporating gender and climate change perceptions, it expanded the existing literature on valuing river ecosystem services. The findings showed a significant number of households experiencing severe water scarcity in the past five years, with over 70% facing occasional or regular WS in the last 12 months. Rice farmers were willing to adopt coping measures and preventive practices to preserve water-related ES, recognizing their importance for sustaining rice cultivation. Farmers demonstrated willingness to contribute financially to restore and maintain water-related ES in rivers and canals. The median willingness to pay for restoration was VND188,300/ha, with estimated values of US$2,898,133 for a 10% affected area and US$23,185,068 for an 80% affected area over five years. Perception of WS severity and associated risk positively influenced households’ decisions to contribute financially. These findings have policy implications and provide insights for effective coping strategies against WS, enhancing water-resilient agriculture in the Lower Mekong Basin.
Publisher: Wiley
Date: 23-01-2023
Abstract: Farmers have a long history of adjusting their production practices in response to changing production conditions. Using a multinomial endogenous treatment effects model that accounts for observable and unobservable heterogeneity, this study investigates the adoption and welfare impacts of climate‐resilient practices on Vietnamese rice‐cultivating households. We found evidence of clear and positive welfare impacts from the adoption of canal irrigation (CI) and the joint adoption of agricultural conservation practices (CP) and CI as the main adaptation strategies to increase water stress. More importantly, although farmers with access to CI systems obtained the highest returns, the joint adoption of multiple practices still had substantially high adoption rates and significantly positive effects on rice yield, rice revenue and household income. Our findings indicate that farms' and farmers' characteristics, market information and climatic conditions are generally the main factors driving rice farmers' decisions to adopt climate‐resilient technologies, both in idually and jointly. Follow‐up policy interventions should focus on improving CI systems and promoting the joint adoption of climate‐resilient technologies to improve rice farmers' well‐being and enhance their resilience capacity to cope with incoming climatic uncertainty.
Publisher: Asian Economic and Social Society
Date: 15-03-2022
Abstract: Shrimp farmers in Vietnam respond passively to market risks, such as input and output price shocks. This study provides a better understanding of market risks, risk management strategies adopted by shrimp farmers, the factors driving their choice of strategies, and how such strategies affect farm performance. Random s ling was used to collect information from a s le of 246 shrimp farmers. Several analytical methods were combined, including descriptive analysis, coefficient of variance estimation for market risks, and a logistic regression model to uncover factors behind farmers’ decisions to adopt risk management strategies. To cope with market risks, shrimp farmers frequently adopt two risk management strategies: changes in farming technology and practices, and agricultural input contracts. Overall, 54.9% of shrimp farmers only used a single strategy, whereas the others used combined risk management strategies. Age, farm size, membership in a farmers association, participation in training, gender, price of output, price of seed, price of fertilizer, distance from farm to the market center, and shrimp type were identified as factors driving the probability of using combined risk management strategies.
Publisher: Horizon Research Publishing Co., Ltd.
Date: 12-2022
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.JENVMAN.2018.10.011
Abstract: Systemic changes in environmental conditions, such as climate, can have a significant impact on both natural and human systems. This paper provides an improved understanding of the spatio-temporal variations in underlying climate processes, and the potential effects climate change may have on Vietnam's agricultural sector. Statistical methods were combined with geostatistical techniques to test the statistical significance of long-term trends in the climatic variables, graphically representing the distribution of climate patterns, identifying variations and trends of changes over time and their likely effects on agricultural production. By using records of monthly precipitation and temperature for a relatively long-term period (1975-2014) over a high density of 112 meteorological stations across the country, robust statistical and visual evidence of climatic change throughout Vietnam are provided. The Mann-Kendall trend test confirms the statistically significant long-term trends of rainfall and temperature in many regions across the country. The visual analysis shows remarkable changes in the spatio-temporal distribution patterns of those variables and most of the 'hotspot' areas identified by geostatistical mapping are in areas with confirmed long-term trends. The long-term significant trends are also concentrated in areas with very high proportion of agricultural land, particularly land used for rice production in the Red River and Mekong River deltas. The findings deliver a better understanding of underlying climate processes and impacts across regions of Vietnam and provide a basis to develop effective climate-related policies for agricultural production in response to changing climatic conditions.
No related grants have been discovered for Kien Nguyen-Duc.