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Continuous Behavior of Using Food Delivery Mobile Applications in Vietnam after Covid-19 Pandemic
Ha Thu LUONG(Ha Thu LUONG ),Nhi Lan DAO(Nhi Lan DAO ),Trang Thu NGUYEN(Trang Thu NGUYEN ),Uyen Thu Thi LA(Uyen Thu Thi LA ),Na Thi Le TRAN(Na Thi Le TRAN ),Hoa Thi DUONG(Hoa Thi DUONG ) 한국유통과학회 2023 유통과학연구 Vol.21 No.3
Purpose: During and after Covid-19 pandemic, technology has emerged as a key factor in supporting the recovery of the economy and the rise of living standards. This study examines seven factors affecting the intention of food delivery apps usage, which include Performance Expectancy, Effort Expectancy, Social Influence, Hedonic Motivation, Price Value, and Habit, and how much influence they have on the customers' behavioral continuance of food delivery apps after Covid-19 Pandemic. Research methodology: This research is a quantitative descriptive research with 473 qualified respondents from 550 respondents collected. Besides using the UTAUT2 model (Venkatesh et al., 2012), Information Quality was added to give a better explanation for the consumers’ intention towards continuance behavior using food delivery apps. The collected data is then processed using SPSS 22.0. Results: Habit factors and Information Quality factors have significant positive effects on promoting food delivery apps usage intention, which in turn influences continuance behavior. In addition, Habit factors and Information Quality factors together have an effect of 48.57% on Behavioral Intention. Conclusion: The result proves that positive habits and food information quality can increase the usage intention towards the behavioral continuance of consumers. Higher usage frequency can be improved by increasing these two factors.
Determinants Influencing Housing-Option Decision of Gen Y: The Case of Vietnam
Ha Thu LUONG(Ha Thu LUONG ),Dung Manh TRAN(Dung Manh TRAN ),Dan Linh Ngoc NGUYEN(Dan Linh Ngoc NGUYEN ),Van Bao NGUYEN(Van Bao NGUYEN ),Anh Thuc LE(Anh Thuc LE ),Hieu Van PHAM(Hieu Van PHAM ) 한국유통과학회 2023 유통과학연구 Vol.21 No.7
Helix Nucleation via Hydrocarbon Cross-link Mimicking N-capping Box
Luong Thuy Nguyen,Huy Xuan Luong,김영우 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.4
The N-capping box is a well-known helix-stabilizing motif with a distinct reciprocal backbone–side chain hydrogen-bonding arrangement at the N-terminus of helices. This unique N-terminal flanking motif consists of a hydrogen-bonded cycle of four amino acid residues in which the backbone amide of the N3 residue forms a hydrogen bond with the side chain of the Ncap residue, and reciprocally, the side chain of the N3 accepts a hydrogen from the Ncap amide. In this study, as a new helix-stabilizing strategy, we examined a metathesis-based cross-linking system that mimics the hydrogen bond between the Ncap amide and the side chain of the N3 at the N-terminus. Using this new system, we prepared two alanine/lysine-based model peptides and analyzed its impact on helix stabilization. We found that a 16-membered macrocycle incorporated by ring-closing metathesis effectively induces and stabilizes helical conformations of the given model sequence.
Two new species of Camellia (Theaceae) from Vietnam
Lieu Thi Nguyen,Ninh Tran,Uematsu CHIYOMI,Katayama HIRONORI,Dung Van Luong,Son Thanh Hoang,Ky Danh NGUYEN,Hung Viet NGUYEN,Toan Canh THAI 한국식물분류학회 2018 식물 분류학회지 Vol.48 No.2
Two new species of Camellia (Theaceae) are described from Vietnam: Camellia vuquangensis Luong, Tran & L. T. Nguyen and Camellia hatinhensis Luong, Tran & L. T. Nguyen. The new taxa were col- lected from Vu Quang National Park in the center of Vietnam. The new finds are morphologically dissimilar to all known Camellia species. Recent Camellia discoveries have increased the number of species recorded in Viet- nam from 50 to 75, making Vietnam a center of diversity and a crucial area for more research into the diversity and distributions of Camellia.
The Impact of Income Inequality on Economic Growth: Empirical Evidence from Vietnam
Luong Quang HIEN 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.2
Each country’s economic progress creates opportunities for its citizens to raise their income. Meanwhile, the country has secured the people’s social security policies, particularly the protection of income equality, to promote harmonious and sustained economic development. Vietnam has been located in a dynamic economic development area in Southeast Asia since the 1986 economic reforms, with an annual growth rate of around 7%. Meanwhile, having achieved a middle-income status of roughly 3500 USD per person per year, Vietnam is attempting to maintain income equality and access to welfare systems for its inhabitants. As a result, the primary goal of this study is to use an autoregressive distributed lagged model to investigate the effects of income inequality and other economic factors such as foreign direct investment and trade openness on Vietnam’s economic growth from 1992 to 2019. The research focuses attention on literature on income inequality, economic development indicators, and economic development in unique ways in this study. Income inequality slows the rate of change in economic development in the same year, according to our findings. Finally, the study will make policy suggestions to the Vietnamese government.
Conversion of Rain Rate Cumulative Distributions by Multiple Regression Model
Luong Ngoc Thuy Dung,손원 사단법인 한국위성정보통신학회 2014 한국위성정보통신학회논문지 Vol.9 No.4
At frequencies above 10 GHz, rain is a dominant propagation phenomenon on satellite link attenuation. The prediction ofrain attenuation is based on the point rainfall rate for 0.01 % of an average year with one minute integration time. Mostof available rain data have been measured with 60 minutes integration time, and many researchers have been studying onconverting the rainfall rate data from various integration times to one minute integration time. This paper proposes a newMultiple Regression model for the conversion, and the proposed schemes show better performance than the existing schemes.
Regional Powers and the Building of an East Asian Community
( Luong T. H. Dinh ) 한국EU학회 2005 Asia-Pacific Journal of EU Studies Vol.3 No.1
The author aims to contribute her views about the relationship between regional powers and the integration process in East Asia, arguing that the interests of powerful states would determine the nature, dynamics and directions of the East Asian Community-building process. The term ``regional powers`` used in the paper refers to China and Japan, the two Northeast Asian powerful states. The paper consists of three parts. From historical and theoretical perspectives, the paper discusses the concept of regionalism in East Asia and the idea of the East Asian Community that the regionalism-making process in East Asia is gearing to, highlighting the increasing role played by China and Japan. Next, the paper focuses on the analysis of changes in the perceptions held and policies pursued by China and Japan toward the building of the East Asian Community and regional integration at large. Lastly, based on the analysis, the paper envisions the future roles by China and Japan to the building of an East Asian Community.
Luong Thi Oanh,Duong Thanh Tai,Truong Thi Hong Loan,James CL Chow 한국원자력학회 2021 Nuclear Engineering and Technology Vol.53 No.12
The aim of this study is to calculate the JO-IMRT dose distributions based on the AAPM TG-119 usingMonte Carlo (MC) simulation and Prowess Panther treatment planning system (TPS) (Panther, ProwessInc., Chico, CA). JO-IMRT dose distributions of AAPM TG-119 were calculated by the TPS and wererecalculated by MC simulation. The DVHs and 3D gamma index using global methods implemented inthe PTW-VeriSoft with 3%/3 mm were used for evaluation. JO-IMRT dose distributions calculated by TPSand MC were matched the TG-119 goals. The gamma index passing rates with 3%/3 mm were 98.7% formulti-target, 96.0% for mock prostate, 95.4% for mock head-and-neck, and 96.6% for C-shape. The dose inthe planning target volumes (PTV) for TPS was larger than that for the MC. The relative dose differencesin D99 between TPS and MC for multi-target are 1.52%, 0.17% and 1.40%, for the center, superior andinferior, respectively. The differences in D95 are 0.16% for C-shape; and 0.06% for mock prostate. Mockhead-and-neck difference is 0.40% in D99. In contrast, the organ curve for TPS tended to be smaller thanMC values. JO-IMRT dose distributions for the AAPM TG-119 calculated by the TPS agreed well with theMC.
PID based sliding mode controller design for the micro quadrotor
Luong Tuan Long,Sangchul Won 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
In this paper, a PID based sliding mode controller is implemented on a micro quadrotor. The micro quadrotor is a nonlinear, underactuated and interconnected system, thus it should be regulated by an appropriate control technique. The advantages of the proposed controller are to remain the robustness characteristics to disturbances and to solve the chattering phenomenon of the conventional sliding mode control (SMC). Therefore, it can prevent the unexpected instability, decrease the energy consumption and improve the operation of the micro quadrotor. The effectiveness of the proposed controller is demonstrated through simulation results.