66 research outputs found
Agglomeration Economies and Location Choices by Foreign Firms in Vietnam
This paper studies the effects of agglomeration economies on the location choices by foreign firms in Vietnam. By using a large dataset that provides detailed information about individual firms, the study examines the location choices by 568 newly created foreign firms in 2005 in about 150 different 4-digit industries. This is one of the few studies of agglomeration effects on the location choices by foreign investments in transition economies in general and in Vietnam in particular. The estimates of the negative binomial regression model and the conditional logit model show that agglomeration benefits motivate foreign firms in the same industries and from the same countries of origin to locate near each other. However, the empirical results also indicate that there is competition among provinces in Vietnam in attracting foreign investors, and the locations of Vietnamese firms have no effects on the location decisions by foreign firms in the same industry.Agglomeration, Location choice, Foreign direct investment
Multifactorial Evolutionary Algorithm For Clustered Minimum Routing Cost Problem
Minimum Routing Cost Clustered Tree Problem (CluMRCT) is applied in various
fields in both theory and application. Because the CluMRCT is NP-Hard, the
approximate approaches are suitable to find the solution for this problem.
Recently, Multifactorial Evolutionary Algorithm (MFEA) has emerged as one of
the most efficient approximation algorithms to deal with many different kinds
of problems. Therefore, this paper studies to apply MFEA for solving CluMRCT
problems. In the proposed MFEA, we focus on crossover and mutation operators
which create a valid solution of CluMRCT problem in two levels: first level
constructs spanning trees for graphs in clusters while the second level builds
a spanning tree for connecting among clusters. To reduce the consuming
resources, we will also introduce a new method of calculating the cost of
CluMRCT solution. The proposed algorithm is experimented on numerous types of
datasets. The experimental results demonstrate the effectiveness of the
proposed algorithm, partially on large instance
1M parameters are enough? A lightweight CNN-based model for medical image segmentation
Convolutional neural networks (CNNs) and Transformer-based models are being
widely applied in medical image segmentation thanks to their ability to extract
high-level features and capture important aspects of the image. However, there
is often a trade-off between the need for high accuracy and the desire for low
computational cost. A model with higher parameters can theoretically achieve
better performance but also result in more computational complexity and higher
memory usage, and thus is not practical to implement. In this paper, we look
for a lightweight U-Net-based model which can remain the same or even achieve
better performance, namely U-Lite. We design U-Lite based on the principle of
Depthwise Separable Convolution so that the model can both leverage the
strength of CNNs and reduce a remarkable number of computing parameters.
Specifically, we propose Axial Depthwise Convolutions with kernels 7x7 in both
the encoder and decoder to enlarge the model receptive field. To further
improve the performance, we use several Axial Dilated Depthwise Convolutions
with filters 3x3 for the bottleneck as one of our branches. Overall, U-Lite
contains only 878K parameters, 35 times less than the traditional U-Net, and
much more times less than other modern Transformer-based models. The proposed
model cuts down a large amount of computational complexity while attaining an
impressive performance on medical segmentation tasks compared to other
state-of-the-art architectures. The code will be available at:
https://github.com/duong-db/U-Lite.Comment: 6 pages, 7 figure
Ho Chi Minh's Thoughts On Control Of The State's Power And Lessons For Vietnam
In Vietnam, the Stateâs power is unified, agencies shall assign, coordinate and control each other in the
exercises of the legislative, executive, and judicial powers. This is necessary to prevent abuse of power
and ensure the stateâs power. The Constitution 1946 was written by Ho Chi Minh (1890 -1969) and
created a mechanism and foundation to control the stateâs power in Vietnam. Nearly, in the
Constitution 2013, the issue of controlling state power is recorded. The assignment and control are
reflected in the assignment of the scope of power to each state agency. From the approach of
philosophical, social philosophy, and political philosophy, through research and analysis documents
in Ho Chi Minh Complete Collection; of previous researchers and policies, legal of Vietnamâs
Government on control of the state's power and lessons for Vietnam today. The result shows that Ho
Chi Minhâs thought on controlling power has shown the basic contents related to asserting that the
power owner belongs to the people and focusing on supervision; use the Constitution to limit state
power. The article also gives experiences when studying Ho Chi Minh's thoughts on state power
control over Vietnam today
Anomalous Magnetic Moment of Muon in Economical 3-3-1 Model
We investigate in detail contribution of new particles to the muon anomalous magnetic moment in the framework of the economical 3-3-1 model. The main contributions to the anomalous magnetic moment come from new neutral gauge boson , bilepton singly charged vector boson . The contributions of new neutral/charged scalars are small and can be neglected. The result is extended to other versions of 3-3-1 models.Comparing the anomalous magnetic moment value in this model with experimental value we set the extension requirement for the model
STRESS AND COPING STRATEGIES OF SECONDARY SCHOOL TEACHERS IN TRA CU DISTRICT, TRA VINH PROVINCE, VIETNAM
By using a cross-sectional study, this study aimed to determine the ratio of occupational stress, stress levels and the relationship between stress status and social characteristics of the sample, factors at work, as well as how
secondary school teachers respond to stress in Tra Cu District, Tra Vinh Province. The study conducted a survey to investigate 466 teachers currently teaching at 14 secondary schools in Tra Cu District, Tra Vinh Province, from May 2020 to June 2020. Research results showed that the percentage of teachers who suffered mild stress
and severe stress was 18.9% and 8.1%, respectively. The signs of stress in teachers correlated with several factors such as job demand, work control and ways of coping at work. When the average score of the assessment âjob demandâ or âwork controlâ increased by one point, the rate of stress on teachers was reduced by 23% (95% CI: 0.73 â 0.81) and 12% (95% CI: 0.84 â 0.93) respectively. By contrast, the average score of âconfrontationâ increased by one point leading to 3.21 times higher (95% CI: 2.61 â 3.96) possibility of causing stress. As well as the average score of "avoidance" increased by one point, the possibility of causing stress in teachers increased 3.03 times (95% CI: 2.45 â 3.74). The findings showed that mental health problems in
teachers at secondary schools, in general and in Tra Cu District, Tra Vinh Province in particular, had not received sufficient attention. Therefore, the problems should be taken seriously not only by teachers school administration
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