An Introduction to Immigration Laws of Vietnam

Ngo,Huy Cuong 한국입법정책학회 2010 입법정책 Vol.4 No.2

베트남이 통일된 지 36년이 지났다. 통일 당시 해외로 도피했던 교민들이 이제는 해외에서 형성한 부를 모국 베트남의 국가건설 에 투자하면서 자신의 정체성을 찾고자 한다. 2010년 현재 베트남 의 해외교민 4백30만 명 중 약 3백만 명 이상이 북미에 거주하고 있다. 이들은 베트남 전쟁 후 이주한 세대와 그 자손들이 대부분 인데, 베트남 정부는 해외교민을 ‘과거에 집착해서 큰 것을 놓치 면 안 된다’는 철저한 실용주의 원칙으로 대하고 있다. 베트남 부 는 민족이라는 기치아래 국가발전을 위한 베트남인의 대단결을 호소하고 있으며 해외교민의 국내 투자와 국내귀국을 독려하고 있다. 베트남정부는 베트남을 출입국 및 통과하는 외국인들에게 최상 의 환경을 제공하며; 베트남 법률과 베트남이 국제조약에 맺은 규 정에 의하여 베트남에 거주하는 외국인의 생명, 재산, 권리 및 기 타의 이익을 보호하도록 규정하고 있다. 베트남에 출입국, 통과, 거주하는 외국인은 베트남의 전통, 풍습, 습관 및 베트남의 법을 준수하고 존중해야 한다. 베트남의 출입국, 통과, 거주가 법률위반 을 위한 목적으로 이용되는 것을 엄격히 금하고 있으며 외국인 출입국, 통과, 거 주에 관하여 베트남이 국제조약에서 맺은 규정과 이 법령 규정사이에 차이가 있다면 국제협정규정이 우선하도록 하고 있다. 외국인은 신고한 입국목적과 맞게 외국인 왕래금지 구역을 제 외하고 베트남 영토 내에 자유스럽게 다닐 수 있다. 금지구역에 출입하려면 금지구역을 관리하는 정부심사기관의 허가를 받아야 한다. 또한 장기체류 외국인은 공안부 출입국관리기관에서 장기체 류증을 발급 받는다. 이 장기체류증을 소지한 자는 베트남 출입국 시 비자가 면제된다.

The Influence of Organizational Culture on Employees’ Satisfaction and Commitment in SMEs: A Case Study in Vietnam

Thuy Dung PHAM THI1,Anh Tin NGO2,Nam Tien DUONG3,Van Kien PHAM4 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5

The purpose of this study is to evaluate the impact of organizational culture on job satisfaction and organizational commitment among employees in small and medium-sized enterprises in Ho Chi Minh City, Vietnam. The study hypothesized that organizational culture has a significant influence on employees’ satisfaction and that satisfaction also significantly impactsorganizational commitment among employees. The data are collected from a sample of 240 office employees. Structural Equation Modeling is used to determine the influence of organizational culture dimensions,including open working environment, salary, and rewards, empowerment, management style, corporate values, on employees’ satisfaction and organizational commitment. The findings showed that the five dimensions of organizational culture positively impact employees’ satisfaction and that job satisfaction significantly influences organizational commitment. Thus, job satisfaction serves as the bridge between organizational culture and commitment. The current study contributes to providing a practical insight into the relationships between organizational culture, employees’ job satisfaction, and organizational commitment. Based on that, managers can develop suitable personnel policies for their organizations to simultaneously enhance employees’ performance and satisfaction, which makes them stay with the company.

The Role of Non-Governmental Organizations in the Climate Change Response Policies in Ho Chi Minh City, Vietnam

Ngo Hoai Son,김판석 한국외국어대학교 동남아연구소 2023 東南亞硏究 Vol.33 No.2

NGOs play a crucial role in climate change response strategies in Vietnam through their involvement in policymaking. This study reviews the areas of NGO engagement in climate change policies in the context of Ho Chi Minh City, and presents suggestions for improving their participation. Based on the theory of climate services, it employed a content analysis technique using NVivo 11 software to examine the participation of 30 registered NGOs. The results indicate that engagement in climate change response policies is comparable to that reported in other studies on the same topic. NGO participation in the implementation of climate change response policies focuses primarily on policy lobbying, community capacity building, research and consultation, and livelihood development. NGOs have played a crucial role in assisting and supporting the most severely affected communities by helping people consolidate and enhance their capacity to adjust to the effects of climate change through adaptation measures, disaster preparedness, and capacity building.

Effect of Bisphenol A Exposure on DNA Methylation is Associated with Decrease in Low-Frequency Power of Heart Rate Variability

Bao Dieu Linh Ngo(Bao Dieu Linh Ngo ),Yun-Chul Hong(Yun-Chul Hong),Jin Hee Kim(Jin Hee Kim) 한국환경보건학회 2021 한국환경보건학회 학술대회 자료집 Vol.2021 No.2

Low-temperature NO₂ gas sensor fabricated with NiO and reduced graphene oxide hybrid structure

Ngo, Yen-Linh Thi,Hur, Seung Huyn Elsevier 2016 Materials research bulletin Vol.84 No.-

<P><B>Abstract</B></P> <P>The fabrication of highly sensitive gas sensors that can monitor environmental toxic gases, such as nitrogen dioxide (NO<SUB>2</SUB>), which is one the most harmful gases to human health, attracts considerable attention. In this study, a hybrid structure composed of reduced graphene oxide (rGO) and a p-type NiO hierarchical structure (NiO-rGO) is fabricated using a facile solution process. The morphology and surface properties are analyzed by Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The NO<SUB>2</SUB> sensitivity is enhanced by the high surface to volume ratio of the NiO hierarchical structures as well as the enhanced charge transfer of NiO to rGO. The fabricated sensor with a hierarchical NiO and rGO hybrid structure exhibiting high sensitivity and selectivity at a low temperature (100°C) with a rapid response time.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Low temperature operable and highly sensitive gas sensors were fabricated. </LI> <LI> The rGO plays important roles in effective charge transfer from NiO. </LI> <LI> The well-developed NiO flower structures on the rGO surface enhanced the sensitity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Isolation and Identification of the Antibacterial Metabolite from Aspergillus sp. KRICT-MF24 against Erwinia amylovora

Ngo Thi Men,Jae Woo Han,Ji Hye Choi,Yong Ho Choi,Myoung Soo Park,Hun Kim,Gyung Ja Choi 한국농약과학회 2021 한국농약과학회 학술발표대회 논문집 Vol.2021 No.11

The plant pathogenic bacterium, Erwinia amylovora, causes the devastating disease known as fire blight in Rosaceous plants like apple, pear, quince, raspberry and several ornamentals. The culture filtrate of Aspergillus sp. KRICT-MF24 isolated from marine environment has potential to inhibit the growth of E. amylovora. To isolate and identify the antibacterial compound, the culture filtrates were successively partitioned with ethyl acetate and n-butanol. Through in vitro activity-guided fractionation of ethyl acetate layer, we isolated a pure antibacterial compound. The chemical structure was identified as asperlin by MS and NMR spectral analyses. The inhibitory effect of asperlin on the growth of E. amylovora and other plant pathogenic bacteria was investigated using broth microdilution and agar dilution methods. Asperlin showed the inhibitory activity against E. amylovora and Clavibacter michiganensis subsp. michiganensis with minimum inhibitory concentrations of 250 and 125 μg/ml, respectively. Our results suggested the Aspergillus sp. KRICT-MF24 and asperlin could be useful for the development of new antibacterial agents to control E. amylovora.

A Reliability-Guaranted Routing Protocol on Wireless Sensor Networks

Ngo Hoai Phong,Myung-Kyun Kim 한국통신학회 2010 한국통신학회 학술대회논문집 Vol.2010 No.11

In the distributed control systems, a sensor periodically collects a physical value from the environment and transmits the collected data to an actuator, which performs a control action based on the value received from the sensor. For stable control operation, those messages from sensors to actuators have to be transmitted reliably, and if the packet reception rate of the actuator becomes lower than a certain threshold, the performance of the control system degrades greatly [1]. In this paper, we propose a reliable message routing protocol for periodic messages on a wireless sensor network which guarantees a specified end-to-end target packet reception rate. The performance of the proposed protocol has been analyzed by simulation using QualNet simulator. The simulation result has shown that the proposed protocol outperforms other routing protocols.

Computational fluid dynamics and experimental validation of a compact steam methane reformer for hydrogen production from natural gas

Ngo, Son Ich,Lim, Young-Il,Kim, Woohyun,Seo, Dong Joo,Yoon, Wang Lai Elsevier 2019 APPLIED ENERGY Vol.236 No.-

<P><B>Abstract</B></P> <P>A three-dimensional (3D) computational fluid dynamics (CFD) model of an annulus steam methane reforming (SMR) reactor was developed for producing 2.5 Nm<SUP>3</SUP>/h of H<SUB>2</SUB> from natural gas. The feed and combustion gases played a role in a counter-current heat exchange owing to a narrow sleeve equipped between the combustor and catalytic reactor. The momentum, energy, and mass conservation equations were integrated with a realizable <I>k</I>–<I>ε</I> turbulence model, discrete ordinates radiation model, and reversible SMR reaction kinetics. The CFD results such as axial temperature profiles and producer gas compositions were validated against the experimental data measured in this study. The thermal efficiency of the compact SMR reactor was 60%, and the heat flux through the reactor wall was 39 kW/m<SUP>2</SUP>. The overall heat transfer coefficient from the sleeve to the catalytic reactor was 158 W/m<SUP>2</SUP>/K. The sleeve-type SMR reactor flattened the temperature profile along the reactor length.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A CFD model was developed for an annulus steam methane reformer (SMR) with a sleeve. </LI> <LI> Effect of the sleeve between combustor and reactor on heat transfer was investigated. </LI> <LI> The sleeve performing as a counter-current heat exchanger flattened axial temperature. </LI> <LI> The CFD model will provide a tool for improving the design of the compact SMR reactor. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Influence of structure-soil-structure interaction on foundation behavior for two adjacent structures: Geo-centrifuge experiment

Ngo, Van-Linh,Kim, Jae-Min,Lee, Changho Techno-Press 2019 Geomechanics & engineering Vol.19 No.5

This paper illustrates the results of a series of seismic geotechnical centrifuge experiments to explore dynamic structure-soil-structure interaction (SSSI) of two structures (named S1 and S2) installed on ground surface. A dense homogeneous ground is prepared in an equivalent shear beam (ESB) container. Two structural models are designed to elicit soil-foundation-structure interaction (SFSI) with different masses, heights, and dynamic characteristics. Five experimental tests are carried out for: (1) two reference responses of the two structures and (2) the response of two structures closely located at three ranges of distance. It is found that differential settlements of both structures increase and the smaller structure (S2) inversely rotates out of the other (S1) when they interact with each other. S2 structure experiences less settlement and uplift when at a close distance to the S1 structure. Furthermore, the S1 structure, which is larger one, shows a larger rocking and a smaller sliding response due to the SSSI effects, while S2 structure tends to slide more than that in the reference test, which is illustrated by an increase in sliding response and rocking stiffness as well as a decrease in moment-to-shear ratio (M/H·L) of the S2 structure.

Autonomous Offshore Container Crane System Using a Fuzzy-PD Logic Controller

Ngo Phong Nguyen,Trong Nghia Phan,Quang Hieu Ngo 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10

A Fuzzy-PD control strategy for an offshore container crane is investigated in this study. The offshore crane is used to handle containers between a mega container ship (called the “mother ship”) and a smaller ship (called the “mobile harbor”), which is equipped with container crane. The concept of the mobile harbor is a floating form that has the capability of transferring cargo to the local harbor from a large ship that is anchored in a nearby sea, thereby minimizing the port congestion and also eliminating the need of expanding outwards. The control objective during the loading and unloading process is to keep the payload in the desired region in the presence of ship motions. A new control strategy which is a combination of a Fuzzy controller, PD controller and compensation mechanism, is proposed as well. A Fuzzy controller plays a main role in creating the appropriate voltage, based on the dynamics and knowledge of an experienced designer, for guarantees not only prompt suppression of load swing but also accurate control of container crane position. In addition, a classical PD controller is used to tune the value of state variables into suitable range before becoming the inputs of the fuzzification process. This control scheme guarantees the stability of the closed-loop system. Simulation and experimental results are provided to verify the effectiveness of the proposed control system for offshore container cranes.