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Hai Quynh Tram NGUYEN,Yen Nhi LE,Ly Giau LAM,Thi Yen Nhi LE,Trieu Di NGUYEN,Thi Kim Yen PHAM,Trong Luan NGUYEN 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.5
Many consumers are opting for online booking over traditional booking systems. Customers can actively seek out information about hotels and lodging services, as well as book rooms, at any time and from any location. Customers also feel more supported when they interact with virtual assistants or professionals. Recognizing this issue, several hotels have focused on improving their websites by incorporating aspects that encourage customers to book directly through the hotel’s website. The study’s goal is to discover what factors impact people’s decisions to book a hotel stay through the hotel’s website. Therefore, hotel managers and owners can make decisions to improve the hotel website to attract residents to Can Tho City. The factors are website quality, affective commitment, social presence, and e-trust that affect customers’ decision to book through the hotel website. The study uses quantitative methods to collect data from 180 residents living in Can Tho. Through data analysis on SPSS and Amos software, the research results show that three factors considered, namely website quality, affective commitment, and social presence, positively influence customers’ booking decisions. This finding also suggests that e-trust is less critical to residents in Can Tho City, different from what the study had predicted.
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Colorimetric Determination of Singlet Oxygen Scavengers Using a Protein Photosensitizer
Miso Kim,Eun Hye Kim,Thi Hai Yen Pham,Tuan Anh Hoang Le,Thi Phuong Do,Thi Nga Nguyen,Thi Cuc Nguyen,Ha Phuong Trieu,Thi Thao Do,김영필 한국바이오칩학회 2020 BioChip Journal Vol.14 No.2
Despite the diverse roles of singlet oxygen ( 1 O2) in plants and animals, simple detection of 1 O2 has been limited due to technical difficulties. Here we report a colorimetric method for visualizing the generation and suppression of 1 O2 using a protein photosensitizer, mini singlet oxygen generator (miniSOG). Upon external light irradiation, miniSOG strongly produced 1 O2 and oxidized a universal chromogenic reagent, tetramethylbenzidine, leading to a rapid color change in solution. We used this finding to demonstrate the 1 O2 scavenging effects of well-known antioxidants and of natural compounds extracted from plants. Owing to its high usability and simplicity, our developed assay platform will be useful for screening potential scavengers for reactive oxygen species and will promote the development of various antioxidants.
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유비쿼터스 센서 네트워크를 이용한 실시간 온 · 습도 기록 및 모니터링 시스템 개발
천성심(Seong-Sim Cheon),김정자(Jung-Ja Kim),원용관(Yonggwan Won),Hai Trieu Pham 大韓電子工學會 2011 電子工學會論文誌-CI (Computer and Information) Vol.48 No.2
유비쿼터스 센서 네트워크(USN: Ubiquitos Sensor Network)는 우리 생활 전반적으로 다양하게 적용되고 있는 기술이다. 본 논문은 온도와 습도를 일정하게 유지해야 할 필요가 있는 공간을 효율적으로 관리할 수 있는 USN 기술 기반의 시스템에 대한 설계 및 이의 구현 사례를 소개한다. 본 시스템은 온 · 습도 센서가 내장된 다수의 센서 모듈을 이용하여 대상 공간에 무선 센서 네트워크를 구성하고, 각 모듈의 센서로부터 감지된 온 · 습도 정보를 실시간으로 수집하여 Database에 기록함과 동시에 사용자가 그래픽 인터페이스를 통해 대상 공간의 온 · 습도 현황을 Monitoring 할 수 있는 시스템이다. 또한, 각 온 · 습도 센서 모듈의 관리 대상 공간에 대하여 특정 온 · 습도 값을 지정하고 이 값과 일정 수준 이상의 오차가 발생하면 경고를 발생토록 한다. 본 논문에서 소개하는 시스템은 수동적이었던 기존의 데이터 수집 및 관리 방식을 자동화함으로서 보다 편리하고 효율적으로 대상 공간의 온 · 습도를 관리할 수 있으며, 저장된 데이터를 이용하여 온 · 습도로 인해 발생된 문제점에 대한 사후 분석 및 환경의 개선에 필요한 정보를 얻을 수 있다. Ubiquitos sensor network(USN) is a technology which is widely used in our life. This paper introduces an example of design and implementation for a system which is based on the USN technology and can provide an efficient management tool for a space that should be precisely controlled for a certain range of uniformity in temperature and humidity. This introduced system builds a wireless sensor network using a number of sensor modules that are equipped with temperature and humidity sensors, and collects temperature and humidity information in real-time while simultaneously providing a method for monitoring the status of temperature and humidity by the graphical user interface. Also, the system will give a warning signal if the monitored values are differ from the pre-specified values of temperature and humidity for each sensor module more than a certain amount of tolerance. This temperature and humidity logging and monitoring system can perform better management for the space easily and efficiently by automating the existing manual method for data collection and management. Furthermore, using the stored data, it can make possible to perform post-analysis on the problems caused by temperature and humidity and to obtain information for environmental enhancement for the space.
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인솔 장착형 단하지 보조기의 생체 역학적 분석을 통한 보행 영향성 평가
정지용 ( Ji Yong Jung ),김진호 ( Jin Ho Kim ),김경 ( Kyung Kim ),원용관 ( Yong Gwan Won ),권대규 ( Dae Kyu Kwon ),김정자 ( Jung Ja Kim ),( Pham Hai Trieu ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.4
The purpose of this study was to evaluate the effects of insole-equipped ankle-foot-orthoses (AFO) on gait. 10 healthy males who had no history of injury in the lower extremity participated in this study as the subjects. The foot of each subject was first scanned, and the insole fit to the plantar was made using BDI-PCO(Pedcad Gmbh, Germany). The subject then was made to walk on a treadmill under four experimental conditions: 1) normal walking, 2) walking wearing AFO, 3) walking wearing AFO equipped with the insole, 4) walking wearing pneumatic-ankle-foot-orthosis (pAFO) equipped with the insole. During walking, foot pressure data such as maximum force, contacting area, peak pressure, and mean pressure was collected using Pedar-X system (Novel Gmbh, Germany) and EMG activity of lower limb muscles such as gastrocnemius medial head, gastrocnemius lateral head, and soleus was recorded using MP150 EMG module (BIOPAC System Inc., USA). Collected data was then analyzed using paired t-test in order to investigate the effects of the insole. As a result of the analysis, when insole was equipped, overall contacting area was increased while both the highest peak pressure and the mean pressure were significantly decreased, and EMG activity of the lower limb muscles was decreased. On the contrary, the cases of wearing AFO showed the decreased contacting area and the increased pressures. Therefore, the AFO equipped with a proper insole fit well to the foot can help comfortable walking by spreading the pressure over the entire plantar.
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