Formative Assessment in Teaching and Learning EFL

Formative assessment in EFL in Vietnam has previously been marginalized; however, there is now recognition of its important role for generating fair and reliable characterizations of students’ performances which cannot be solely made by summative assessments. The presenter will therefore draw attendees’ attention to distinctive features of formative assessment

Accurate overbraiding simulations for complex mandrels:On the role of yarn interactions

Overbraiding is a process to manufacture tubular structural components at a high deposition rate. Composite product development using overbraiding and subsequent infusion can be both costly and time-intensive. This procedure often requires multiple iterations to meet design specifications. To reduce the associated expenses and time investments, simulation tools for overbraiding processes prove to be valuable. Various approaches exist, ranging from straightforward analytical models to computationally intensive finite element methods. Earlier developed kinematic models provide fast computations for complex geometries, making them suitable for design purposes. These models neglect yarn interactions, which reduces the computational cost, but also compromises the accuracy of the model predictions.The aim of this thesis is to develop an efficient yarn interaction model to enhance the accuracy of overbraiding simulations for practical design of components with complex mandrel shapes, improving the accuracy but without severely impairing the computational performance of the kinematic model. To this end, the following three problems are addressed:First, a yarn interaction model was developed for biaxial and triaxial braid patterns. The model considers the stick-slip process at the cross-over point between yarns and at the yarn-ring contact. Subsequently, the solution was implemented in a multiple contact points model employing a fast iterative frontal approach to solve force equilibrium for the braid as a whole. Validations of the overbraiding models against experimental data, encompassing axisymmetric and non-axisymmetric cases, demonstrate a substantial improvement in predictions compared to earlier published simulation results.Second, an experimental setup was developed to measure the yarn-to-yarn coefficient of friction as a function of the inter-yarn angle and normal contact force. Friction between carbon and glass contact pairs was investigated under both dry and water-lubricated conditions. A mesoscopic friction model was introduced to capture the measured impact of the inter-yarn angle and normal force on the dynamic friction coefficient. Notably, observations indicate the formation of a water bridge at the contact interface during wet testing. Furthermore, it is argued that the additional contribution of capillary forces results in consistently higher friction coefficients for yarns lubricated with water compared to dry yarns.Finally, overbraiding simulations for both biaxial and triaxial processes were conducted to investigate the impact of process configurations and friction data on the simulation outcomes. The findings revealed effects of the yarn interactions on braid angles during both the steady and unsteady states of the process. This improved accuracy of the models is achieved with increased computational cost, yet remaining within acceptable range for design and optimization purposes

Grassroots environmental activism in an authoritarian context:the trees movement in Vietnam

There are increasing signs that the space for civil society actions is slowly opening up in Vietnam. The existing studies have linked the changes in civil society action to the changing dynamics of state–society relations in one-party-ruled Vietnam. Yet, the majority of this literature has focused on the activities of NGOs. This article fills this gap by highlighting a high-profile case of civil society activism that is not centred on NGO actions. The Trees Movement is a broad-based citizen-led movement established to protest against Hanoi government’s arbitrary decision to cut down thousands of large old trees lining the city’s streets. I use this case study to argue that citizen-led activism, an emerging form of civic engagement, is likely to play a critical role in effecting change and (re)shaping state-society relations in Vietnam. This form of activism, if sustained, will encourage a move toward more deliberative and accountable politics in the same country in the long run. I also argue that environmental activism has opened up a new arena of contestation for civil society activism in Vietnam

k-Nearest Neighbor Search for Large Scale High Dimensional data

Tohoku University徳山

A Comparison between Male and Female Lab Rats in Operant Conditioning

Undergraduate Basi

Building Footprint Extraction in Dense Areas using Super Resolution and Frame Field Learning

Despite notable results on standard aerial datasets, current state-of-the-arts fail to produce accurate building footprints in dense areas due to challenging properties posed by these areas and limited data availability. In this paper, we propose a framework to address such issues in polygonal building extraction. First, super resolution is employed to enhance the spatial resolution of aerial image, allowing for finer details to be captured. This enhanced imagery serves as input to a multitask learning module, which consists of a segmentation head and a frame field learning head to effectively handle the irregular building structures. Our model is supervised by adaptive loss weighting, enabling extraction of sharp edges and fine-grained polygons which is difficult due to overlapping buildings and low data quality. Extensive experiments on a slum area in India that mimics a dense area demonstrate that our proposed approach significantly outperforms the current state-of-the-art methods by a large margin.Comment: Accepted at The 12th International Conference on Awareness Science and Technolog

Grassroots environmental activism in an authoritarian context:the trees movement in Vietnam

There are increasing signs that the space for civil society actions is slowly opening up in Vietnam. The existing studies have linked the changes in civil society action to the changing dynamics of state–society relations in one-party-ruled Vietnam. Yet, the majority of this literature has focused on the activities of NGOs. This article fills this gap by highlighting a high-profile case of civil society activism that is not centred on NGO actions. The Trees Movement is a broad-based citizen-led movement established to protest against Hanoi government’s arbitrary decision to cut down thousands of large old trees lining the city’s streets. I use this case study to argue that citizen-led activism, an emerging form of civic engagement, is likely to play a critical role in effecting change and (re)shaping state-society relations in Vietnam. This form of activism, if sustained, will encourage a move toward more deliberative and accountable politics in the same country in the long run. I also argue that environmental activism has opened up a new arena of contestation for civil society activism in Vietnam

COSMETIC CONSUMPTION TRENDS OF VIETNAMESE YOUNG PEOPLE – A CASE STUDY OF HIGH SCHOOL AND UNIVERSITY STUDENTS IN HANOI

Our beauty demands are significantly increasing with the rapid development of the Global Economy. The use of cosmetic products has become prevalent among Vietnamese youth. In this article, the research team concentrates on collecting and analyzing data on cosmetics consumer trends of Vietnamese teenagers - research of high school and university students in Hanoi. The research yields some important results: Young people are becoming more interested in natural and time-saving trends toward beauty. The top concerns in using cosmetic products are skincare, haircare, and body odor. Make-up is also catching teenagers’ attention, but the number of young people frequently doing makeup is inconsiderable, mainly due to the lack of knowledge, interest, and time for this field. In addition, the use of cosmetic products is mostly influenced by personal preferences, opinions of friends/relatives, and cultural tastes. The purchase of cosmetic products is driven by prices, brand names, and ingredients. Adolescents also tend to use some healthy products, such as cosmeceutical or vegan ones, to overcome the problems of unclear origins or irritating ingredients. Besides, high school and university students have low financial capacities; therefore, their money spent on cosmetic products is not too high, and the number of cosmetic products owned is not too many. Finally, the improvement of technology has led to two trends among teenagers: the convenience of cosmetic-related information searching and the widespread presence of shopping through e-commerce platforms