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Dr. Minh Hieu Nguyen
Faculty of Transport Economics, University of Transport and Communications

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0 GPS
0 Public Transport
0 covid-19
0 telework
0 Active Transport

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covid-19
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Short Biography

Minh Hieu Nguyen is a lecturer at Faculty of Transport Economics under University of Transport and Communications (Vietnam). His current focus is on impacts of COVID-19 on travel behaviours in connection with the increased use of ICTs and the wide adoption of safety measures.

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Journal article
Published: 17 August 2021 in Sustainability
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In response to insufficient understanding of the determinants of change in e-shopping behaviors during the COVID-19 pandemic in developing countries, this paper used the data from 355 respondents, collected in Hanoi during the social distancing period (April 2020), to explore the factors associated with shopping online more frequently (i.e., representing the growth of e-shopping) for five product types (food, medical products, clothing, electronics, and books) in Hanoi, Vietnam. The results showed that nearly 80% of the respondents engaged in e-shopping more frequently than they did before the outbreak of COVID-19. As regards shopping online more frequently in general (i.e., for at least one product type), females were more likely to do so. In-store shopping enjoyment and a decrease in income were a facilitator and a deterrent, respectively. Regarding specific product types, completely working from home had a positive association with more frequent e-purchasing for electronics. Fear of disease encouraged higher frequencies of e-shopping for food and medical products. Notably, the shortage of physical supply was not a determinant of buying any product type online more frequently. As for the implications of our findings, supporting and encouraging low-income shoppers, older persons, and females to engage in e-shopping is necessary to limit the detrimental effects of the pandemic on their lives. The growth of internet purchasing expresses a need to manage the development of urban delivery services, to limit the uncontrolled proliferation of motorcycles. E-shopping requires delivery to complete the online-to-offline process; therefore, protecting the health of delivery drivers to ensure the safety of the whole online shopping process would be necessary.

ACS Style

Minh Hieu Nguyen; Jimmy Armoogum; Binh Nguyen Thi. Factors Affecting the Growth of E-Shopping over the COVID-19 Era in Hanoi, Vietnam. Sustainability 2021, 13, 9205 .

AMA Style

Minh Hieu Nguyen, Jimmy Armoogum, Binh Nguyen Thi. Factors Affecting the Growth of E-Shopping over the COVID-19 Era in Hanoi, Vietnam. Sustainability. 2021; 13 (16):9205.

Chicago/Turabian Style

Minh Hieu Nguyen; Jimmy Armoogum; Binh Nguyen Thi. 2021. "Factors Affecting the Growth of E-Shopping over the COVID-19 Era in Hanoi, Vietnam." Sustainability 13, no. 16: 9205.

Journal article
Published: 14 March 2021 in Sustainability
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The rapid and widespread of COVID-19 has caused severe multifaceted effects on society but differently in women and men, thereby preventing the achievement of gender equality (the 5th sustainable development goal of the United Nations). This study, using data of 355 teleworkers collected in Hanoi (Vietnam) during the first social distancing period, aims at exploring how (dis)similar factors associated with the perception and the preference for more home-based telework (HBT) for male teleworkers versus female peers are. The findings show that 56% of female teleworkers compared to 45% of male counterparts had a positive perception of HBT within the social distancing period and 63% of women desired to telework more in comparison with 39% of men post-COVID-19. Work-related factors were associated with the male perception while family-related factors influenced the female perception. There is a difference in the effects of the same variables (age and children in the household) on the perception and the preference for HBT for females. For women, HBT would be considered a solution post-COVID-19 to solve the burden existing pre-COVID-19 and increasing in COVID-19. Considering gender inequality is necessary for the government and authorities to lessen the adverse effects of COVID-19 on the lives of citizens, especially female ones, in developing countries.

ACS Style

Minh Nguyen; Jimmy Armoogum. Perception and Preference for Home-Based Telework in the COVID-19 Era: A Gender-Based Analysis in Hanoi, Vietnam. Sustainability 2021, 13, 3179 .

AMA Style

Minh Nguyen, Jimmy Armoogum. Perception and Preference for Home-Based Telework in the COVID-19 Era: A Gender-Based Analysis in Hanoi, Vietnam. Sustainability. 2021; 13 (6):3179.

Chicago/Turabian Style

Minh Nguyen; Jimmy Armoogum. 2021. "Perception and Preference for Home-Based Telework in the COVID-19 Era: A Gender-Based Analysis in Hanoi, Vietnam." Sustainability 13, no. 6: 3179.

Article
Published: 22 January 2021 in Transportation
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During the era of COVID-19 (COronaVIrus Disease of 2019), telework has been adopted extensively in developing countries for the first time. This study analyzes data of 355 teleworkers in Hanoi (Vietnam) during April 2020, the period of social distancing, to examine various factors associated with (1) complete home-based telework (HBT), (2) the perception of HBT, and (3) the attitude toward the combination between HBT and conventional work at workplace post-COVID-19. It finds that the company’s closure policy and the frequency of working from a distance before the social distancing period were the primary determinants of exclusively teleworking. Regarding the perception of HBT, while the fear of COVID-19 was a strong positive factor, difficulties in focusing on work and accessing data were negative factors. Regarding the attitude toward the future development of HBT, attitudinal factors, commute distance, gender, children in household, and the perception of HBT in the social distancing period were the main predictors. The presence of more than one child negatively affected the perception of telework but positively affected the attitude toward establishing the hybrid work mechanism. The findings suggested that HBT has the potential to alleviate traffic congestion in developing countries and it can be promoted by emphasizing its environment-related benefits. The sample used in this research was collected in the initial stage of constrained mobility and it was not well representative; therefore, this study serves as a proof of concept for ongoing wider analyses on HBT post-COVID-19 or in the subsequent lockdown periods.

ACS Style

Minh Hieu Nguyen. Factors influencing home-based telework in Hanoi (Vietnam) during and after the COVID-19 era. Transportation 2021, 1 -32.

AMA Style

Minh Hieu Nguyen. Factors influencing home-based telework in Hanoi (Vietnam) during and after the COVID-19 era. Transportation. 2021; ():1-32.

Chicago/Turabian Style

Minh Hieu Nguyen. 2021. "Factors influencing home-based telework in Hanoi (Vietnam) during and after the COVID-19 era." Transportation , no. : 1-32.

Research article
Published: 31 December 2020 in Transportation Research Record: Journal of the Transportation Research Board
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This paper presents a method for enhancing purpose imputation from global positioning system data without using geographic information system data via relevant feature selection from six groups: (1) activity time; (2) user characteristics; (3) predicted travel modes; (4) actual travel modes; (5) estimated home location; and (6) estimated location of the most frequently visited non-home place (MFVP). Two datasets were collected in 2019 using TRavelVU, a smartphone application. The first one (the Hanoi dataset) comprised 652 days’ worth of data collected from 63 users in Hanoi, Vietnam, whereas the second one (the Donate dataset) comprised 932 days’ worth of information collected from 65 individuals in Denmark, Sweden, and Norway. The hyperparameters of the random forest models were tuned carefully in accordance with selected features, thereby facilitating a thorough evaluation of the improvement in prediction models. The findings of this study revealed that the addition of either actual or predicted modes resulted in improved imputation performance, albeit the former exhibited a stronger positive effect. This demonstrated the potential benefits of integrating mode detection and purpose identification into a continuous process. The newly adopted MFVP feature contributed to enhanced prediction results (around 2%). The proposed purpose-imputation models, which benefited from all features, demonstrated accuracies of the order of 75% and 85% for the Hanoi and Donate datasets, respectively. The imputation of home and work/education activities demonstrated high success, whereas reasonable prediction results with nearly all F-score levels ranging between 50% and 83% were observed for pick-up/drop-off, shopping/eating, visit/leisure, and business activities.

ACS Style

Minh Hieu Nguyen; Jimmy Armoogum; Emeli Adell. Feature Selection for Enhancing Purpose Imputation using Global Positioning System Data without Geographic Information System Data. Transportation Research Record: Journal of the Transportation Research Board 2020, 1 .

AMA Style

Minh Hieu Nguyen, Jimmy Armoogum, Emeli Adell. Feature Selection for Enhancing Purpose Imputation using Global Positioning System Data without Geographic Information System Data. Transportation Research Record: Journal of the Transportation Research Board. 2020; ():1.

Chicago/Turabian Style

Minh Hieu Nguyen; Jimmy Armoogum; Emeli Adell. 2020. "Feature Selection for Enhancing Purpose Imputation using Global Positioning System Data without Geographic Information System Data." Transportation Research Record: Journal of the Transportation Research Board , no. : 1.

Conference paper
Published: 09 October 2020 in Lecture Notes in Civil Engineering
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Walking plays an essential role in both daily mobility and human health. Unfortunately, measuring walking behavior in self-reported surveys is usually subject to lack of accuracy due to the limit of human memory, the habit of not only rounding travel time but also neglecting short and unimportant trip legs. To cope with such a problem, the use of the Global Positioning System (GPS) is promising. This study aimed at developing an inference model to derive travel modes from 406-day GPS data of 90 respondents living in Lyon city and its suburbs (France). Based on mode detection results, aspects of walking (i.e., purposes, length, duration, speed, the relation between walking and home, the relation between walking and other modes) were estimated. For detecting modes well, particularly walking, a fuzzy logic-based algorithm using average speed, the 95th percentile of speed, and the 95th percentile of acceleration were created. Rules of signal loss were proposed to identify metro segments, while respondents’ reports on the frequency of cycling were utilized to address the confusion between walking and cycling better. As for findings, 951 walking stages were found. Because all of the walking patterns, estimated from prediction results of travel modes, were compatible with previous studies’ findings, the mode detection method adopted in this study has performed satisfactorily, particularly concerning imputing walking. The proposed method may enable better use of GPS to conduct further analyses of walking behaviors thanks to deriving walking segments adequately from spatio-temporal data.

ACS Style

Minh Hieu Nguyen; Jimmy Armoogum. Deriving Attributes of Walking Behavior Using GPS-Based Travel Survey and Fuzzy Logic: A Case Study in Lyon, France. Lecture Notes in Civil Engineering 2020, 429 -453.

AMA Style

Minh Hieu Nguyen, Jimmy Armoogum. Deriving Attributes of Walking Behavior Using GPS-Based Travel Survey and Fuzzy Logic: A Case Study in Lyon, France. Lecture Notes in Civil Engineering. 2020; ():429-453.

Chicago/Turabian Style

Minh Hieu Nguyen; Jimmy Armoogum. 2020. "Deriving Attributes of Walking Behavior Using GPS-Based Travel Survey and Fuzzy Logic: A Case Study in Lyon, France." Lecture Notes in Civil Engineering , no. : 429-453.

Conference paper
Published: 09 October 2020 in Lecture Notes in Civil Engineering
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Bus Rapid Transit (BRT) is a concept born in the 1970s and developed successfully in many developing countries because of its advantages (e.g., lower required investment, more flexibility, faster establishment, and much larger capacity) over traditional bus services. However, the first BRT system in Hanoi (Vietnam), which runs between the Kim Ma terminal and the Yen Nghia terminal, is flawed evidence with a daily ridership at approximately 13,500 passengers. This patronage is only comparable with that of the conventional bus route. This study aimed to find underlying factors determining the service quality to propose policy implications for improving the Hanoi BRT. The data used were the responses of 243 BRT passengers gathered in a customer satisfaction survey conducted in March 2017. The method was an adapted version of the well-known SERVQUAL model with the use of Exploratory Factor Analysis. As regards the findings, the four factors found were Quickness and Timeliness (beta = 0.278), Safety and Reliability (beta = 0.249), Access (beta = 0.217), and Comfort (beta = 0.188). They explained 62.5% of the variance of passengers' satisfaction. Among the eight policy solutions proposed to enhance the four factors mentioned above, the three most important and feasible ones were the implementations of the prioritized traffic signal for BRT, busway enforcement, and automatic pre-board ticket collection.

ACS Style

Minh Hieu Nguyen. Evaluating the Service Quality of the First Bus Rapid Transit Corridor in Hanoi City and Policy Implications. Lecture Notes in Civil Engineering 2020, 98 -123.

AMA Style

Minh Hieu Nguyen. Evaluating the Service Quality of the First Bus Rapid Transit Corridor in Hanoi City and Policy Implications. Lecture Notes in Civil Engineering. 2020; ():98-123.

Chicago/Turabian Style

Minh Hieu Nguyen. 2020. "Evaluating the Service Quality of the First Bus Rapid Transit Corridor in Hanoi City and Policy Implications." Lecture Notes in Civil Engineering , no. : 98-123.

Review article
Published: 09 July 2020 in Journal of Traffic and Transportation Engineering (English Edition)
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The global positioning system (GPS) has motivated rapid advances in mobility data collection. A massive amount of spatio-temporal information has made it possible to know where a person was and when, but not how and why (s)he travelled, creating the need for inference models. Compared with mode detection, purpose imputation has been insufficiently studied. However, the relative lack of attention to purpose identification does not mean that this field has not emerged. For this paper, which is the first review dedicated to inferring trip purposes from GPS data, 1162 non-duplicate papers from four databases (Scopus, Web of Science, ScienceDirect and TRID) were screened, and a corpus of 25 publications was selected for examination. Based on these papers, the purpose imputation problem is defined in the contexts of the evolution of GPS-based travel surveys and two research domains, transportation science (TS) and human geography (HG). Subsequently, three steps of the purpose detection process, namely trip end detection, input feature selection and main algorithms and validation, are surveyed. During these procedures, the differences between studies in TS and those in HG are highlighted. Finally, unresolved issues related to data and feature selection, algorithms and assessment are discussed substantially to provide potential research directions. This review may be an informative reference for those newly accessing the GPS-based purpose imputation field and/or intending to develop solutions to this problem.

ACS Style

Minh Hieu Nguyen; Jimmy Armoogum; Jean-Loup Madre; Cédric Garcia. Reviewing trip purpose imputation in GPS-based travel surveys. Journal of Traffic and Transportation Engineering (English Edition) 2020, 7, 395 -412.

AMA Style

Minh Hieu Nguyen, Jimmy Armoogum, Jean-Loup Madre, Cédric Garcia. Reviewing trip purpose imputation in GPS-based travel surveys. Journal of Traffic and Transportation Engineering (English Edition). 2020; 7 (4):395-412.

Chicago/Turabian Style

Minh Hieu Nguyen; Jimmy Armoogum; Jean-Loup Madre; Cédric Garcia. 2020. "Reviewing trip purpose imputation in GPS-based travel surveys." Journal of Traffic and Transportation Engineering (English Edition) 7, no. 4: 395-412.

Journal article
Published: 02 July 2020 in Travel Behaviour and Society
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This study presents attempts to impute modes from data collected via smartphones in Hanoi (Vietnam), where the dominant mode of travel is the motorcycle. The inclusion of the motorcycle mode and an imbalance in the modal share of the Hanoi data resulted in ineffective use of supervised-learning models to detect all modes simultaneously. For a high level of accuracy and reasonable interpretability, a hierarchical process was developed. Initially, walk, bicycle, and motorized modes were identified by a fuzzy logic-based algorithm. Subsequently, based on the distribution of bus stops and the operation of buses in practice, rules employing the average distance between stops, which a vehicle passed slowly or stopped at, were introduced to detect bus segments. Finally, a random forest model was built to distinguish the modes of motorcycle and car. The proposed hierarchical process achieved an accuracy of 89.1%. The bus detection, which required only the coordinates of the bus stops, demonstrated a recall of 94.8%. The motorcycle mode of travel was noted to be the main source of misclassification. This mode has contributed to the diversity of the mode detection field, which has previously only focused on walk, bicycles, cars, buses/trams, and trains. The hierarchy was developed and validated using a dataset that did not include travel by metro or train and would be biased toward persons working and studying at a university. These limitations emphasize the need to test the process on a more diverse sample with more travel options.

ACS Style

Minh Hieu Nguyen; Jimmy Armoogum. Hierarchical process of travel mode imputation from GPS data in a motorcycle-dependent area. Travel Behaviour and Society 2020, 21, 109 -120.

AMA Style

Minh Hieu Nguyen, Jimmy Armoogum. Hierarchical process of travel mode imputation from GPS data in a motorcycle-dependent area. Travel Behaviour and Society. 2020; 21 ():109-120.

Chicago/Turabian Style

Minh Hieu Nguyen; Jimmy Armoogum. 2020. "Hierarchical process of travel mode imputation from GPS data in a motorcycle-dependent area." Travel Behaviour and Society 21, no. : 109-120.

Journal article
Published: 05 April 2019 in Journal of Alloys and Compounds
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The fabrication of efficient and durable novel electrocatalysts using a facile and cheap way is a potential approach for real energy conversion technology. In this research, a novel nanohybrid based on iron nickel nanoparticles well attached on nitrogen doped graphene nanosheets (Fe2Ni1 NPs/N-Gr) was synthesized through a simple refluxing strategy followed by a calcination process. It was discovered that the material displayed good catalytic behavior for oxygen reduction reaction (ORR) in alkaline environment. The ORR kinetics of the material primarily occurred through a 4-electron transferred pathway consistent with high diffusion limit current density, excellent onset potential (−0.013 V) as well as half-wave potential (−0.065 V). Furthermore, the material showed good stability and outstanding methanol tolerance as compared to a commercial Pt/C catalyst. The resulting catalytic performance of the material was assumed to the synergistic effect from bimetallic Fe2Ni1 NPs and thin nitrogen doped graphene, which improved electroactive site numbers, promoted charge transfer ability, and adjusted adsorption energy for oxygen molecules. The results imply that such novel materials may be an effective and low-cost catalyst for ORR in energy conversion technology.

ACS Style

D.M. Nguyen; M.H. Nguyen; Q.B. Bui. A novel electrocatalyst based on Fe2Ni1 nanoparticles anchored nitrogen doped graphene nanosheets towards efficient oxygen reduction reaction. Journal of Alloys and Compounds 2019, 780, 734 -742.

AMA Style

D.M. Nguyen, M.H. Nguyen, Q.B. Bui. A novel electrocatalyst based on Fe2Ni1 nanoparticles anchored nitrogen doped graphene nanosheets towards efficient oxygen reduction reaction. Journal of Alloys and Compounds. 2019; 780 ():734-742.

Chicago/Turabian Style

D.M. Nguyen; M.H. Nguyen; Q.B. Bui. 2019. "A novel electrocatalyst based on Fe2Ni1 nanoparticles anchored nitrogen doped graphene nanosheets towards efficient oxygen reduction reaction." Journal of Alloys and Compounds 780, no. : 734-742.

Journal article
Published: 01 February 2019 in International Journal of Urban Sciences
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ACS Style

Minh Hieu Nguyen; Thanh Tung Ha; Sy Sua Tu; Thanh Chuong Nguyen. Impediments to the bus rapid transit implementation in developing countries – a typical evidence from Hanoi. International Journal of Urban Sciences 2019, 23, 464 -483.

AMA Style

Minh Hieu Nguyen, Thanh Tung Ha, Sy Sua Tu, Thanh Chuong Nguyen. Impediments to the bus rapid transit implementation in developing countries – a typical evidence from Hanoi. International Journal of Urban Sciences. 2019; 23 (4):464-483.

Chicago/Turabian Style

Minh Hieu Nguyen; Thanh Tung Ha; Sy Sua Tu; Thanh Chuong Nguyen. 2019. "Impediments to the bus rapid transit implementation in developing countries – a typical evidence from Hanoi." International Journal of Urban Sciences 23, no. 4: 464-483.

Journal article
Published: 01 December 2018 in Materials Chemistry and Physics
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Small and uniform bimetallic WMoSx nanoparticles well distributed on surface of thin graphene nanosheets (WMoSx-Gr) was prepared and investigated as an effective electrocatalysts for oxygen reduction reaction (ORR) in alkaline electrolyte. This material exhibited highly catalytic activity relative to a commercial Pt/C product. In this context, the material showed a large limit current density, positive onset potential (−0.05 V) as well as half wave potential (−0.13 V). In particularly, the superior durability and methanol tolerance of the as-synthesized material were also pronounced, as compared to Pt/C. The high ORR activity of the WMoSx-Gr material was assumed to the synergistic effect produced from a unique nanostructure of the WMoSx and the high surface area graphene with its excellent conductivity. The obtained results imply that such hybrid material can open a new type of highly efficient non-Pt catalyst for ORR in alkaline environment.

ACS Style

D.M. Nguyen; M.H. Nguyen; Q.B. Bui. Uniform WMoSx nanoparticles attached graphene nanosheets as highly effective electrocatalyst for oxygen reduction reaction in alkaline medium. Materials Chemistry and Physics 2018, 224, 186 -195.

AMA Style

D.M. Nguyen, M.H. Nguyen, Q.B. Bui. Uniform WMoSx nanoparticles attached graphene nanosheets as highly effective electrocatalyst for oxygen reduction reaction in alkaline medium. Materials Chemistry and Physics. 2018; 224 ():186-195.

Chicago/Turabian Style

D.M. Nguyen; M.H. Nguyen; Q.B. Bui. 2018. "Uniform WMoSx nanoparticles attached graphene nanosheets as highly effective electrocatalyst for oxygen reduction reaction in alkaline medium." Materials Chemistry and Physics 224, no. : 186-195.

Book chapter
Published: 01 January 2018 in Advances in Transport Policy and Planning
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More than 165 cities on 6 continents have implemented BRT systems. While most have been successful, some have failed—either to perform at a high level or to expand further. This chapter examines the reasons for failures, which can be as illuminating as the reasons for successes. Five case studies are included: Bangkok, Delhi, Hanoi, Lagos, and Lima. The analysis is structured according to an existing theoretical framework, which considers: (1) institutional and legislative context; (2) political leadership and commitment; (3) management of competing modes; (4) public participation; (5) funding and coordination; (6) physical design; and (7) image promotion.

ACS Style

Minh Hieu Nguyen; Dorina Pojani. Why Do Some BRT Systems in the Global South Fail to Perform or Expand? Advances in Transport Policy and Planning 2018, 35 -61.

AMA Style

Minh Hieu Nguyen, Dorina Pojani. Why Do Some BRT Systems in the Global South Fail to Perform or Expand? Advances in Transport Policy and Planning. 2018; ():35-61.

Chicago/Turabian Style

Minh Hieu Nguyen; Dorina Pojani. 2018. "Why Do Some BRT Systems in the Global South Fail to Perform or Expand?" Advances in Transport Policy and Planning , no. : 35-61.