Potential benefits from the adoption of new groundnut varieties in northern Vietnam: An ex ante assessment

Enabled by land reforms and fuelled by technological change, agricultural production in Vietnam grew tremendously after the mid-1980s. Focusing on groundnut, an export-oriented cash and food crop, this paper provides estimates of potential benefits from the adoption of improved varieties in northern Vietnam. At farm level, switching over to improved varieties generates additional revenue of VND1.8 to 3.9 million per hectare (US$1 is equivalent to about VND15,969). The aggregate benefits for northern Vietnam are huge. With the groundnut area remaining unchanged, the annual value of benefits from the adoption of improved varieties in 80$35.8 million) at a real discount rate of 5%. These benefits will be 14% larger if the groundnut area continues to expand at the rate achieved in the recent past

Rainfall variability and internal migration: the importance of agriculture linkage and gender inequality

This paper investigates the extent to which exposure to climate volatility can in-fluence individual migration decisions in Vietnam, based on the historical rainfall data from 70 weather stations in Vietnam and the Vietnam Access to Resources House-hold Survey. Utilizing the exogenous variation in the rainfall deviation from the local norms within an individual fixed-effects framework, we uncover the negative associa-tion between rainfall and the probability of individual migration. Individual migration probability drops by 7.5 percentage points when the amount of rainfall relative to the long-run local average doubles. This reduction could potentially be driven by individ-uals who work in the agricultural sector and are less likely to migrate as more rainfall could increase their agricultural incomes. Furthermore, our heterogeneity analyses sug-gest that rainfall shocks could perpetuate gender inequality in Vietnam since women cannot cope with climatic shocks through migration. Policy-makers could shift their focus on flood control and water management in affected areas, where people’s liveli-hoods depend on agriculture, to efficiently address issues related to climate-induced internal migration

Rainfall variability and internal migration: the importance of agriculture linkage and gender inequality

This paper investigates the extent to which individual migration decisions in Vietnam can be driven by climate change, based on the historical rainfall data from 70 weather stations in Vietnam and the Vietnam Access to Resources Household Survey. Utilizing the exogenous variation in the rainfall deviation from the local norms within an individual fixed-effects framework, we uncover the negative association between rainfall and the probability of individual’s decision to migrate. We find that doubling the amount of precipitation relative to the long-run local average reduces the probability of migration by 7.5 percent. This result could potentially be driven by individuals who work in the agriculture sector and could have experienced an increase in income as high precipitation could lead to high yield. Furthermore, our heterogeneity analyses suggest rainfall shocks could perpetuate gender inequality in Vietnam as women are less likely to migrate when being affected by climate change. Policymakers could shift their focus to flood control and water management in affected areas, where people’s livelihoods depend on agriculture, to efficiently address issues related to climate-induced internal migration

Expérimentation en vraie grandeur de buses métalliques sous haut remblai

Le comportement des buses métalliques enterrées sous recouvrement important dépend de l’Interaction mécanique entre la structure flexible et le sol environnant sous les conditions de charge subies au cours de leur construction et aussi lorsqu'elles sont en service.Une expérimentation en vraie grandeur a été effectuée sur trois buses circulaires de 2,50 m de diamètre ; l’une est de conception classique, les deux autres comportent soit un, soit deux dispositifs contractables devant permettre de reporter dans le sol environnant une partie des contraintes normalement supportées par l'ouvrage

Stable methods for ill-posed problems and application to reconstruction of atmospheric temperature profile

SIGLEITItal

Removal of Congo red and malachite green from aqueous solution using heterogeneous Ag/ZnCo-ZIF catalyst in the presence of hydrogen peroxide

The bimetallic Zn/Co zeolitic imidazole frameworks (ZnCo-ZIFs) were successfully synthesized by a simple solvothermal method at room temperature. Silver elements were afterward doped onto the bimetallic frameworks to form Ag/ZnCo-ZIFs via a facile impregnation method in acetone solvent. The as-synthesized material was used as a heterogeneous catalyst for the removal reaction of Congo red (CR) and malachite green (MG) in the presence of hydrogen peroxide (H2O2). Effects of catalyst dosage, H2O2 concentration, initial concentration of the contaminants, reaction temperature, and reaction time were conducted in this work. The results showed that more than 94% and 98% removal of CR and MG were, respectively, achieved within 45 and 30 min. The presence of Ag also enhanced the removal efficiency of CR and MG. The main mechanism of removal reaction of the organic contaminants could be oxidation via hydroxyl radicals. Moreover, the catalytic activity of the material remained over 90% after four recycling cycles. Due to the efficient reactivity as well as high stability, Ag/ZnCo-ZIFs can be a potential heterogeneous catalyst to remove hazardous dyes from aqueous solution

Synthesis and cytotoxicity of novel γ-piperidone-containing dibenzo-1,7-diaza-14-crown-4 ethers

For the development of new antitumor agents, novel dibenzo-1,7-diaza-14-crown-4 ethers containing γ-piperidone moiety were synthesized by a domino condensation of new podands, ketones and ammonium acetate. The crystal structure of one Ts of them was studied by X-ray diffraction. Four crown compounds were evaluated in vitro for cytotoxic activity against 5 human cancer cell lines. © 201