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NGO, Chi Thanh,NGUYEN, Thi Ngoc Mai,NGUYEN, Duy Dat,LE, Hoang Ba Huyen,LE, Van Cuong,LE, Thi Binh Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.9
The study aims to investigate factors affecting enterprise's satisfaction and loyalty toward the Social Security's online public services, looking at the case of Thanh Hoa province, Vietnam. This study employs samples with 216 enterprises that use online public system of Thanh Hoa province's Social Security. The research model is closely linked to the SERVQUAL model developed by Parasuraman, Zeithaml and Berry (1988). We propose 23 scales that constitute the quality of service, three scales that constitute Customer Satisfaction and three components that constitute Customer Loyalty. This study use the tool of Exploratory Factor Analysis (EFA), Cronbach's Alpha test, Confirm Factor Analysis (CFA) and Structural Equation Modeling (SEM) in order to address the question of satisfaction and loyalty. The result shows that the factor with the most impact is Reliability, next is Capacity of staffs, Tangibles, Attitude of staffs, and the least impacting factor is Empathy; moreover, the results also show that Satisfaction has a strong impact on Customer Loyalty. The findings of this study suggest that Thanh Hoa province's Social Security should: (i) strengthen the reliability of online service system; (ii) build capacity for staffs; (iii) develop the responsiveness of electronic transactions systems; and (iv) improve the empathy of staffs.
Spectrum of Lysosomal Storage Disease Targeted for Newborn Screening in Vietnam
Dung, Vu Chi,Ngoc, Can Thi Bich,Khanh, Nguyen Ngoc,Mai, Do Thi Thanh,Thao, Bui Phuong,Mai, Tran Thi Chi,Ha, Nguyen Thu,Huong, Nguyen Thi Mai,Nam, Nguyen Hoang,Hai, Le Thanh,Tomatsu, Shunji,Yoo, Han-Wo Association for Research of MPS and Rare Diseases 2017 Journal of mucopolysaccharidosis and rare disease Vol.3 No.1
Nguyen Thu Hang,Nguyen Mai Chi,Nguyen Hoang Trung,Thi Y Van Tran,Vu Ngoc Trung,Thu Hang Bui,Duc Trinh Chu,Bui Tung Thanh,Jen Chun-Ping,Quang Loc Do 한국농업기계학회 2024 바이오시스템공학 Vol.49 No.1
Purpose Circulating tumor cell separation and analysis have played a critical role in cancer diagnosis, prognosis, and treatment. In this work, we aim to design and investigate a novel biochip that integrates dielectrophoresis, microfl uidic technology to separate circulating tumor cells from blood cells. To create a dielectrophoresis-induced non-uniform electric fi eld, a facing-electrode design was proposed and utilized, in which a slanted electrode array and a simple rectangular ground electrode are placed parallel on the top and bottom parts of the microfl uidic channel, respectively. This design can reduce the particle position dependence in the microchannel and the complexity of the microfabrication process. Methods The separation process, effi ciency, and optimization of the proposed device were numerically investigated using the fi nite element method. Parametric research was conducted to comprehensively examine the impact of various operating and design factors on the cell movement and trajectories in the microfl uidic device. Results The results indicated the potential of the proposed biochip to ensure cancer cell separation from blood cells with high effi ciency, high purity in a label-free, non-invasive, easy integration, and low-cost manner. Under the optimal conditions, the separation effi ciency reached 92%, 88%, and 96% for human colon cancer cells (HT-29), red blood cells, and white blood cells, respectively. Conclusions In this study, a novel DEP-based microfl uidic chip was proposed to separate HT-29 tumor cells from blood cells and numerically investigated to verify the performance of the biochip design. Our fi ndings could provide a foundation for further theoretical and practical investigations. The proposed system can separate cancer cells from red blood cells and white blood cells as well as off ers numerous advantages, such as compact size, low voltage, high effi ciency, non-invasiveness, and label-free nature. The tumor cell enrichment platform has the potential for application in cancer detection, analysis, and assessment.
Experiment Model and Multi Sensor Fusion Methods for Contact Force Control
Chi-Thanh Nguyen,Soon-Yong Yang 한국자동차공학회 2015 한국자동차공학회 지부 학술대회 논문집 Vol.2015 No.11
This paper is to essentially introduce to fusion method of multi sensor including of force, position and acceleration sensors to improve the grinding or deburring engineering. The sensor fusion method reflects the tool working on work-piece while maintaining a desired contact force by using Intelligent Deburring Control (IDC) device. The force sensor measures actual force, the position sensor observes the operation of pneumatic cylinders of IDC device for triggering and halting the air supply, and the acceleration sensor estimated inertial force of end-effector. The system with combination of these sensors is validated by experiments following on compliant linear module in LabVIEW/Real time environment with NI cRIO 9012 and FPGA interface module. The compliant movement of linear module is driven by using a variable speed and direction step motor.
Nguyen, Hien Thi Dieu,Nguyen, Chung Van,Pham, Chung,Nguyen, Phong Thanh,Le, Cuong Chi Hung,Pham, Nhung Thi,Tran, Nguyet Thi Anh World Association for Triple Helix and Future Stra 2022 Journal of Contemporary Eastern Asia Vol.21 No.1
The world has witnessed the outbreak of the Covid-19 epidemic. Mainstream and social media are playing an important role in Covid-19 pandemic prevention. This research explores awareness, communication channels and effectiveness of communication in the Covid-19 pandemic in rural areas of Thua Thien Hue province, Central Vietnam. Primary information was collected from 181 respondents, who are farmers, non-farmers and students. Secondary information was collected from reports and statistical data. Television, word of mouth and local loudspeakers are the main channels of mainstream media while social media mentions the role of Facebook and Zalo to transfer Covid-19 pandemic information. Mainstream media is still the main channel of farmers and old people while non-farmers and young people tend to access information through social media. Communication has significantly contributed to improving awareness and action of rural people in the Covid-19 epidemic prevention.
Chi-Thanh Nguyen,Soon-Yong Yang 유공압건설기계학회 2015 유공압건설기계학회 학술대회논문집 Vol.2015 No.10
This paper is to study on fusion method of multi sensor including of force, position and acceleration sensors to improve the grinding or deburring engineering. The sensor fusion reflects the tool working on workpiece while maintaining a desired contact force by using Intelligent Deburring Control (IDC) device. The force sensor measures real contact force, the position sensor observes the operation of built-in pneumatic cylinders of IDC device and the acceleration sensor estimated inertial force of end-effector. The system with combination of these sensors is validated by experiments following on compliant linear module in LabVIEW/Real time module environment.
Nguyen, Chi Thanh,Hoang, Phan Huy,Perumal, Jayakumar,Kim, Dong-Pyo Royal Society of Chemistry 2011 Chemical communications Vol.47 No.12
<P>A high resolution negative-tone-type of inorganic–organic diblock copolymer photoresist was synthesized as a novel precursor for simple and direct fabrication of SiCN ceramic mesoporous patterns with ordered nanoscale pores by using a “top-down” photolithographic technique and the subsequent sacrificial processes of a “bottom-up” self-assembled nanostructure.</P> <P>Graphic Abstract</P><P>An inorganic–organic diblock copolymer photoresist was synthesized as a novel precursor for simple and direct fabrication of SiCN ceramic mesoporous patterns with ordered nanoscale pores <I>via</I> a photolithographic technique. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cc05836j'> </P>
Study on Turn-over Stability for Field Robot with Swinging Manipulator
Chi Thanh Nguyen(웬치탄),Y. H. Lee(이영현),S. Y. Yang(양순용) 유공압건설기계학회 2013 유공압건설기계학회 학술대회논문집 Vol.2013 No.6
The Field Robot is a kind of heavy machinery used in various applications worldwide, such as in agriculture, demolition, forestry, general construction, industry, mining and more. However, they pose a great danger to users and the surroundings when they turn over. In this paper, the motivation is the investigation of the stability of such machine without turning over. Therefore, when the manipulator rotates a circle, we compute the needed energy that is big enough to make such machine turning over. This energy, is interacted between external forces and moments and gravitational forces, is computed basing on concept of energy stability level. Similarly, this concept takes into consideration the instantaneous change of machine’s center of gravity position while the manipulator swings with a constant velocity. Moreover, inertial and manipulation effects usually appear in the motion of such vehicles when that are used for services or industrial applications. From the characteristics of stability are described in simulation results, we set necessary limits on swing velocity, operating zone … to ensure the safe of machine.