1,529 research outputs found
Thai Quang Trung. Collective Leadership and Factionalism. An Essay on Ho Chi Minh's Legacy
No full textBui Xuan Quang. Thai Quang Trung. Collective Leadership and Factionalism. An Essay on Ho Chi Minh's Legacy. In: Politique étrangère, n°3 - 1985 - 50ᵉannée. p. 802
Agricultural_land_consolidation
No full textThis repository contains benchmark datasets for two problems: the Bin Packing Problem with Relaxed Capacity Constraint (BPP) and the Soft-Rectangle Packing Problem with Guillotine Constraint (SRPP). These problems are part of a two-stage decomposition approach used in Agricultural Land Consolidation in Vietna
Assessing the impact of traffic climate and risk-taking attitude on the risky riding behaviour of young motorcyclists in Vietnam
No full textThis research investigates the interrelationships between traffic climate perceptions, risk-taking attitudes, and motorcyclists' riding behaviours in Vietnam using the Driver Behaviour Questionnaire (DBQ) and Traffic Climate Scale (TCS). The study, conducted among young motorcyclists aged 18-24, explores how perceptions of traffic climate, characterised by functionality, external affective demands, and internal requirements, influence risk-taking attitudes and subsequent riding behaviours. The analysis reveals that external affective demands positively correlate with higher risk-taking attitudes, whereas internal requirements are inversely related. Increased risk- taking attitudes predict frequent riding errors, violations, and lapses. These findings underscore the complexity of factors contributing to hazardous riding behaviours and highlight the need for targeted interventions that address both individual attitudes and perceived traffic conditions to improve road safety. The study emphasises the critical role of traffic climate in shaping riding behaviours, providing essential insights for developing effective road safety strategies in developing countries.We express our sincere gratitude to the anonymous reviewers and the editors for their insightful and constructive feedback, which has significantly improved the quality of this research. This work was supported by a grant obtained from Wallonie-Bruxelles International (WBI) for the project 2.17 (Renforcement des compétences en matière de recherche, d’enseignement et de consultance dans le domaine de la logistique) and by the FNRS (National Fund for Scientic Research) in Belgium. We also acknowledge the ethical approval of the study by the University of Danang, by decision 3542/QD-DHDN
sj-docx-1-npx-10.1177_1934578X231174993 - Supplemental material for Hepatoprotective and Antioxidant Activities of Phenolic Compounds from <i>Heliciopsis terminalis</i>
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X231174993 for Hepatoprotective and Antioxidant Activities of Phenolic Compounds from Heliciopsis terminalis by Bui V. Trung, Duong H. Anh, Pham H. Viet and Phan Van Kiem in Natural Product Communications</p
Understanding the Growing Role of Driving Anger in the Risk of Traffic Incidents involving Vietnamese Motorcyclists
No full textpeer reviewedObjective
This study validates the Vietnamese versions of the Driving Anger Scale and Driving Anger Expression Inventory, two prominent instruments for determining driving anger proneness and expression. Using these scales, the authors investigate the relationships between driving anger and motorcyclists' on-road risks in Vietnam.
Methods
Factor analyses are conducted to explore the dimensional constructs of the two scales with a dataset of 960 Vietnamese motorcyclists. The t-tests were applied to assess the differences in driving anger levels between motorcyclists' subgroups. Negative binomial regression is used to predict the probability of motorcyclists' traffic incidents based on driving anger factors and individual differences.
Results
The Vietnamese Driving Anger Scale has three factors, including Hostile gestures (α=.78), Unpleasant conditions (α=.80), and Traffic violations (α=.74). Hostile gestures elicit the most driving anger among Vietnamese motorcyclists. Besides, females report higher propensities for driving anger than males over three anger-provoking factors. The Driving Anger Expression Inventory has a two-factor structure, including Aggressive expressions (α=.83) and Adaptive expressions (α=.74). Vietnamese motorcyclists are more prone to have adaptive expressions than aggressive expressions when angry on-road. The regression results reveal the significant effects of gender and two factors of the Driving Anger Expression Inventory on the probability of traffic incidences. Females have considerably fewer traffic accidents and offenses than males. Besides, the number of minor crashes and violations grows by 1.54 and 1.93 times with each unit rise of the Aggressive expressions factor. Increasing adaptive expression level is associated with a decrease in the numbers of major crashes and offenses (40% and 19% less, respectively).
Conclusions
This study provides insights into driving anger in Vietnam, a motorcycle-dominant country. The findings corroborate the Vietnamese versions of the Driving Anger Scale and Driving Anger Expression Inventory, which contributes to understanding the formation and expression of driving anger and its roles in predicting driving outcomes. Furthermore, the higher on-road risks of males and motorcyclists with more aggressive expressions are highlighted. Generally, enhancing the risk perception about driving anger and promoting the advantages of on-road adaptive expressions may significantly reduce traffic issues in Vietnam
Defective Nb2O5-supported Pt catalysts for CO oxidation: Promoting catalytic activity via oxygen vacancy engineering
No full textWe introduced oxygen vacancies into Nb2O5 via thermal treatment at 700 degrees C under oxygen-deficient conditions for different lengths of time. Niobia-supported Pt catalysts were subsequently synthesized using the wet impregnation method with the fabricated Nb2O5. The catalytic activity of the synthesized catalysts for CO oxidation exhibited a significant increase from that obtained for a counterpart having the Nb2O5 support treated under saturated oxygen conditions (i.e., in air). Moreover, increasing the number of oxygen vacancies was found to increase the catalytic activity. At 150 degrees C, the TOF calculated for the catalyst with the most oxygen vacancies was 0.36 s(-1), which was much higher than that obtained from the catalyst possessing the fewest oxygen vacancies (0.05 s(-1)). Systematic characterization of the synthesized catalysts revealed the crucial impact of oxygen vacancies and active lattice oxygen on the enhancement of catalytic activity. (C) 2019 Elsevier Inc. All rights reserved.
sj-docx-1-npx-10.1177_1934578X221096173 - Supplemental material for Strychnovanosides A - C, Three New Lignan Glycosides from <i>Strychnos vanprukii</i>
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X221096173 for Strychnovanosides A - C, Three New Lignan Glycosides from Strychnos vanprukii by Nguyen Chi Mai, Ninh Khac Ban, Truong Quang Trung, Dinh Thien Hoang, Bui Van Thanh, Do Thi Trang, Bui Huu Tai and Phan Van Kiem in Natural Product Communications</p
Defective Nb2O5-supported Pt catalysts for CO oxidation: Promoting catalytic activity via oxygen vacancy engineering
No full text© 2019 Elsevier Inc.We introduced oxygen vacancies into Nb2O5 via thermal treatment at 700 °C under oxygen-deficient conditions for different lengths of time. Niobia-supported Pt catalysts were subsequently synthesized using the wet impregnation method with the fabricated Nb2O5. The catalytic activity of the synthesized catalysts for CO oxidation exhibited a significant increase from that obtained for a counterpart having the Nb2O5 support treated under saturated oxygen conditions (i.e., in air). Moreover, increasing the number of oxygen vacancies was found to increase the catalytic activity. At 150 °C, the TOF calculated for the catalyst with the most oxygen vacancies was 0.36 s−1, which was much higher than that obtained from the catalyst possessing the fewest oxygen vacancies (0.05 s−1). Systematic characterization of the synthesized catalysts revealed the crucial impact of oxygen vacancies and active lattice oxygen on the enhancement of catalytic activit
Size-controlled model Ni catalysts on Ga2O3 for CO2 hydrogenation to methanol
No full text© 2019 Elsevier Inc.The effect of particle size for Ni nanoparticles supported on β-Ga2O3 was investigated for CO2 hydrogenation to methanol at 0.5 MPa. Model Ni nanoparticles ranging from 3.3 to 10.2 nm were synthesized using the hot injection method by controlling the reaction temperature and time. The smallest Ni nanoparticles (3.3 nm) showed the highest catalytic activity across the entire temperature range and the largest Ni nanoparticles (10.2 nm) showed the highest methanol selectivity. The apparent activation energies for methanol with Ni nanoparticles increased from 6.0 to 18.4 kcal mol−1 as the nanoparticle size increased. Furthermore, it was found that the smallest Ni nanoparticles favor the reverse water gas shift reaction. In situ DRIFT analysis revealed that the gallium oxide itself could produce an intermediate species and the addition of Ni on the oxide support increases the hydrogenation rate. The Ni supported catalysts showed a CO peak, but the smallest Ni nanoparticles showed a larger CO peak than that for the largest Ni nanoparticles, which clearly supports that the smaller nanoparticles favor the reverse water gas shift reactio
LinkMind: Link Optimization in Swarming Mobile Sensor Networks
No full textA swarming mobile sensor network is comprised of a swarm of wirelessly connected mobile robots equipped with various sensors. Such a network can be applied in an uncertain environment for services such as cooperative navigation and exploration, object identification and information gathering. One of the most advantageous properties of the swarming wireless sensor network is that mobile nodes can work cooperatively to organize an ad-hoc network and optimize the network link capacity to maximize the transmission of gathered data from a source to a target. This paper describes a new method of link optimization of swarming mobile sensor networks. The new method is based on combination of the artificial potential force guaranteeing connectivities of the mobile sensor nodes and the max-flow min-cut theorem of graph theory ensuring optimization of the network link capacity. The developed algorithm is demonstrated and evaluated in simulation
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