http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Thanh Cong HA (검색결과 12 건)
- 무료
- 기관 내 무료
- 유료
-
Ha-Linh Quach,Thai Quang Pham,Ngoc-Anh Hoang,Dinh Cong Phung,Viet-Cuong Nguyen,Son Hong Le,Thanh Cong Le,Dang Hai Le,Anh Duc Dang,Duong Nhu Tran,Nghia Duy Ngu,Florian Vogt,Cong-Khanh Nguyen 대한의료정보학회 2022 Healthcare Informatics Research Vol.28 No.4
Objectives: Online misinformation has reached unprecedented levels during the coronavirus disease 2019 (COVID-19) pandemic. This study analyzed the magnitude and sentiment dynamics of misinformation and unverified information about public health interventions during a COVID-19 outbreak in Da Nang, Vietnam, between July and September 2020. Methods: We analyzed user-generated online information about five public health interventions during the Da Nang outbreak. We compared the volume, source, sentiment polarity, and engagements of online posts before, during, and after the outbreak using negative binomial and logistic regression, and assessed the content validity of the 500 most influential posts. Results: Most of the 54,528 online posts included were generated during the outbreak (n = 46,035; 84.42%) and by online newspapers (n = 32,034; 58.75%). Among the 500 most influential posts, 316 (63.20%) contained genuine information, 10 (2.00%) contained misinformation, 152 (30.40%) were non-factual opinions, and 22 (4.40%) contained unverifiable information. All misinformation posts were made during the outbreak, mostly on social media, and were predominantly negative. Higher levels of engagement were observed for information that was unverifiable (incidence relative risk [IRR] = 2.83; 95% confidence interval [CI], 1.33–0.62), posted during the outbreak (before: IRR = 0.15; 95% CI, 0.07–0.35; after: IRR = 0.46; 95% CI, 0.34-0.63), and with negative sentiment (IRR = 1.84; 95% CI, 1.23–2.75). Negatively toned posts were more likely to be misinformation (odds ratio [OR] = 9.59; 95% CI, 1.20–76.70) or unverified (OR = 5.03; 95% CI, 1.66–15.24). Conclusions: Misinformation and unverified information during the outbreak showed clustering, with social media being particularly affected. This indepth assessment demonstrates the value of analyzing online “infodemics” to inform public health responses.
-
The Role of Institution on FDI and Environmental Pollution Nexus
Thanh Cong HA,Hoang Nam NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.6
The research aim is to empirically study the role of institutions in the relationship between foreign direct investment (FDI) and environmental pollution in 86 developing countries during 2008–2018. This study collects key data from the World Development Indicators (WDI). Institution indicators are collected from the Global Governance Indicators (WGI). To carry out the research objectives, the authors conducted quantitative analysis through System Generalized Method of Moments (S-GMM). The research results indicate that FDI positively impacts on environmental pollution. In particular, governmental efficiency, political stability and non-violence, quality regulations, the rule of law and the voice and accountability play an important role in the FDI-environmental pollution nexus in developing countries. The findings of this study suggest that these countries in question need to consider very carefully welcoming FDI inflows. In other words, host governments should build ‘filter funnel’ to attract FDI for long-term development. Moreover, they also have to manage strictly foreign invested enterprises domestically in order to minimize negative impacts on environment quality. For a stable governance environment, each country must strictly follow international environmental agreements, and people and businesses must comply with environmental regulations and raise awareness of environmental protection as the foundation for economic growth and environmental sustainability.
-
The Effect of Social Capital on Social Entrepreneurial Intention among Vietnamese Students
HA, Ngoc Thang,DOAN, Xuan Hau,VU, Trong Nghia,NGUYEN, Thi Phuong Linh,PHAN, Thanh Hoa,DUONG, Cong Doanh Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.8
This study develops the model to estimate the links between social capital, social entrepreneurial self-efficacy, perceived desirability and social entrepreneurial intention. Besides exploring the direct impacts of social capital, social entrepreneurial self-efficacy, and perceived desirability on social entrepreneurial intention, this study also focus on discovering the mediating roles of perceived desirability and social entrepreneurial self-efficacy on this relationship. Throughout adopting measures from some previous studies, the authors design the questionnaires and distribute to students in Vietnam. The study presents some demographic information of 289 students, who are studying at university and colleges in Vietnam. Then, the validity and reliability of scales are assessed using the value of Cronbach's alpha, Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA). In addition, by utilizing the structural modeling structure (SEM), the authors show that social capital plays the important role in shaping social entrepreneurial self-efficacy, perceived desirability, and social entrepreneurial intention. Interestingly, besides the direct effects on social entrepreneurial intention, perceived desirability and social entrepreneurial self-efficacy also mediate the correlation between social capital and social entrepreneurial intention. Also, with the interesting findings of the study, the authors propose several recommendations for policy-makers, educators and academics to promote the social entrepreneurship and innovation among Vietnamese students.
-
-
-
-
Phan, Thanh-Hoang,Ha, Cong-Tu,Park, Warn-Gyu Elsevier 2018 INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Vol.127 No.1
<P><B>Abstract</B></P> <P>The present study aims at validating a computer simulation code for compressible interface flows with and without mass transfers. The numerical method was based on a dual-time fully compressible multiphase homogeneous mixture flow model. The interfaces with a large jump in density, pressure, velocity, and temperature were captured using a compressive high-resolution interface-capturing scheme. Lee’s boiling model was adopted for implementing the mass and energy transfers via interfaces. The bubble collapse between two parallel walls was first examined. The bubble profile during the collapse process was predicted and compared with experimental images. The numerical results showed good agreement. To evaluate the present model for multiphase flows, including the effects of heat and mass transfers, computations were performed for saturated film boiling on a sphere at atmospheric pressure. The evolution of the wavy liquid–vapor interface around the sphere during the film boiling process was observed. The time-averaged heat fluxes obtained from the numerical simulation were compared with those predicted from numerical data and analytical correlations. The effects of the superheated wall on heat fluxes were also investigated.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The validation of a computer simulation code for multiphase flows is implemented. </LI> <LI> A fully compressible two-phase homogeneous mixture flow model is presented. </LI> <LI> Bubble collapse between two parallel walls and saturated film boiling on a sphere are examined. </LI> <LI> The predicted time-averaged heat fluxes agree well with those in previous studies. </LI> </UL> </P>
-
Thi Nguyet Dung NGUYEN,Thanh Cong HA,Manh Cuong NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5
The purpose of the research is to assess the factors affecting the liquidity of the commercial banks that are conducting mergers and acquisitions activities in Vietnam during the 2008–2018 period. This study employs samples based on 2-component data sets with crosssection and time-series data collected from the annual report of the State Bank and the audited acquisitions financial statements of nine commercial banks engaged in mergers and acquisitions activities. To carry out the research objectives, the authors conducted quantitative analysis through the Pooled OLS, REM, FEM and GMM models. The results shown that: (i) bank liquidity is positively affected by liquidity lagged, the return on equity (ROE) and economic growth; negatively affected by bank size, non-performing loan, short-run loan to deposit ratio; (ii) there is not enough evidence to conclude about the relationship between net profit margin, equity-to-assets ratio and inflation rate to bank liquidity; (iii) notably, we found evidence that, after the mergers and acquisitions, the liquidity of Vietnamese commercial banks decreased. The findings of this study suggest that bank managers take a more comprehensive view of the results of mergers and acquisitions and implications for banks to improve liquidity in the post-merger and acquisitions conditions.
-
APPLICATION OF VOLUME OF FLUID INTERFACE TRACKING METHOD TO SIMULATION OFWATER IMPACT
Van-Tu Nguyen,Duc-Thanh Vu,Cong-Tu Ha,Warn-Gyu Park 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.5
In this paper, numerical simulations of water-entry of bodies are presented. Homogeneous flow model based on unsteady incompressible Reynolds-averaged Navier-Stokes equations was used to solve the flow field. Dual-time pseudo-compressibility method was employed to improve the computational efficiency of the solver. To investigate behavior of the water impact phenomenon, a VOF interface tracking algorithm known as the least squares volume-of-fluid interface reconstruction algorithm (LVIRA) is utilized to track the water-air interface. This approach uses the geometric information from the reconstructed interface and the velocity fields in each physical time step to update the volume fractions by solving the advection equation for water phase. The application to the computations of water impact of a hemisphere, two cones, and a wedge through free fall in one degree of freedom are performed. The free surface deformation, pressure coefficients, impact velocities and vertical accelerations during the impact are compared with available experiments and theoretical results. Good agreements with those results are obtained.
-
Role of Atomic and Molecular Nitrogen in Carbon Nanotube Formation
Dao Quang Duy,김현석,Dang Mo Yoon,Jung Woong Ha,Kang Jea Lee,황용규,Bach Thanh Cong,이충훈 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.4
We have investigated the pretreatment effects of nitrogen on the length and the alignment of carbon nanotubes (CNTs) grown on a Ni catalyst by using dc-plasma enhanced chemical vapor deposition system. The surface of the Ni catalyst was pretreated with a mixture of NH3 and N2, instead of pure NH3 and the length of the CNTs has changed from 1.6 um to 400 nm as the NH3/N2 flow rate ratio was decreased. We showed that the length and the alignment of the CNTs could be controlled by changing the NH3/N2 flow rate ratio. The fabricated CNTs were further evaluated by using their Raman spectra. The nitrogen concentration on the surface of the Ni catalyst after the pre-treatment was analyzed by using X-ray photoelectron spectroscopy and the physical structure of CNTs was analyzed using scanning electron microscopy and high resolution transmission electron microscope. We suggest that the N2 adsorption on the surface of Ni changes the carbon atom diffusion during the CNT growth and that the physical structures of CNTs are drastically changed We have investigated the pretreatment effects of nitrogen on the length and the alignment of carbon nanotubes (CNTs) grown on a Ni catalyst by using dc-plasma enhanced chemical vapor deposition system. The surface of the Ni catalyst was pretreated with a mixture of NH3 and N2, instead of pure NH3 and the length of the CNTs has changed from 1.6 um to 400 nm as the NH3/N2 flow rate ratio was decreased. We showed that the length and the alignment of the CNTs could be controlled by changing the NH3/N2 flow rate ratio. The fabricated CNTs were further evaluated by using their Raman spectra. The nitrogen concentration on the surface of the Ni catalyst after the pre-treatment was analyzed by using X-ray photoelectron spectroscopy and the physical structure of CNTs was analyzed using scanning electron microscopy and high resolution transmission electron microscope. We suggest that the N2 adsorption on the surface of Ni changes the carbon atom diffusion during the CNT growth and that the physical structures of CNTs are drastically changed
스콜라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
