Conference Proceedings - 2020
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PublicationNovel Velocity Update Applied for IMU-based Wearable Device to Estimate the Vertical Distance( 2019)The demand for indoor localization that does not rely on the presence of any external infrastructure had been increasing. In general, an indoor localization system was required to be precise, highly accurate and reliable. In this paper, we presented and analyzed an indoor localization wearable device that was capable of positioning people while riding in an elevator. The inertial measurement unit (IMU) was utilized with an embedded system on the device. Current approaches involving IMU mounted on a pedestrian's body generally estimated the displacement on the ground only (in two dimensions). Thinking of a wearable device to estimate the vertical distance for elevator riding and with the fact that there are different levels of height for different buildings, a new algorithm was proposed to estimate distance in vertical direction when people riding in an elevator. The proposed algorithm was based on the double integrating process from global acceleration with gravity removal in which the velocity and distance are updated in periods that the vertical acceleration oscillates around Zero level. Experiments with a wearable device which was designed based on the IMU model MPU9150, Arduino board and wireless Xbee took place for riding in an elevator. Experimental results contained device's attitude, vertical distance and time stamp. They were recorded online wirelessly via Xbee devices into an *txt file. Experiments in this work include riding up and down in an elevator. They were repeated to collect data for evaluation by root mean square error (RMSE) computation based on the ground-truth. The experimental results demonstrated RMSE of 0.77%, 0.88%, 1.66% riding in an elevator through one floor only, riding in an elevator through multiple floors while stopping at each floor, riding in an elevator through 40 floors, respectively.
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PublicationNonlinear Inelastic Analysis for Steel Frames( 2020)The manuscript shows a second-order inelastic analysis procedure for steel framed structures under static and seismic forces. Nonlinear inelastic finite element formulations are established utilized Stability Functions (SF) solved from exact solutions of second-order differential equations of beam-column finite element subjected to moments and axial forces. Stability functions help optimize modeling and computational time because only one element per member is used for beams or columns. Plasticity of steel can be modeled by two approaches: the plastic hinge (PH) and plastic fiber (PF). Generalized Displacement Control (GDC) algorithm is adopted for solving equilibrium equations for static problems, while the Newmark method and Newton-Raphson iterative algorithm are adopted aim for solving dynamic equilibrium equations. A verification example is shown to prove the computational efficiency, accuracy, and prove the convenience of the program for engineering analysis and design.
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PublicationHanoi Old Quarter with Its Historic Tube House Transition in the Vietnam Context( 2020)The Old Quarter is a place combining vestiges of its history and architecture with the traditional urban fabric to make this area more unique in Vietnam. Historically, the area has been definitely a part of Hanoi city since the tenth century and existed until present. The total area is about 82 ha, which contain many individual assets, buildings, tube-houses, other cultural structures and layers. It also faces phenomenon to concretize the buildings and the built heritage environment. This paper aims to share a different view of the heritage environment of Hanoi Old Quarter (HOQ) and its surrounding blocks. Based on research findings, it shows there are three developmental forms, such as: 4 side-directions, 3 side-direction and a single direction, which made unique typology of the blocks at present. Therefore, understanding the local community’s behavior within the blocks is one fundamental condition for managing future change of HOQ’s built heritage effectively and efficiently in the Vietnam context.
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PublicationMotivating Freshmen in Learning Vocabulary with Innovative Interactive Whiteboard Activities( 2020)Vocabulary is one of the most essential factors in English acquisition. Therefore, how to teach vocabulary fascinatingly plays a crucial part in supporting students acquire new words better. Students’ motivation in vocabulary learning can be enhanced by using Interactive Whiteboard (IWB). It has been globally known as a useful tool for teachers to draw students’ attention and boost their motivation by many interactive activities. This paper examines the effect of IWBs on motivating students to learn vocabulary. Mixed methods were used in this investigation. The research data in this thesis were drawn from three main sources: questionnaire, vocabulary motivational scale, and focused group interview. Thirty-five freshmen at Van Lang University, Vietnam participated in this study. The findings show that IWB can be used to motivate freshmen in vocabulary acquisition. The final part of this paper recommends some practical IWB activities for teachers to apply into vocabulary teaching.
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PublicationImproving pronunciation of freshmen through Moodle based activities( 2020)Good pronunciation enhances both the intelligibility and the effectiveness of speech, so how to teach pronunciation has received great attention from teachers and researchers. Among a wide variety of methods, Moodle has emerged as an efficiently potential tool to assist students in acquiring an intelligible pronunciation. Pronunciation courses can be built on a Moodle site where teachers upload and share the designed materials with their students. Despite various advantages of Moodle courses, not many studies offered empirical evaluation of the effectiveness of Moodle projects on improving students’ pronunciation in Vietnam’s English as Foreign Language (EFL) context. Therefore, this study aimed to find out how using Moodle-based activity can improve freshmen’s pronunciation. The project consisted of 62 Van Lang University freshmen (Vietnam), who were organized into two different groups: the control group and the experimental group. Mixed method was used in combination with various tools for data collection such as pre- and post-test, questionnaire and semi-structured interview. The data collected showed that there was a sharp improvement in the experimental group’s pronunciation. In the hope of bettering students’ pronunciation, some suggestions for optimizing Moodle-based activities are also mentioned at the end of this research paper.
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PublicationConstructive Alignment in Teaching English at Tertiary Level: An Insight into an Aun Designed Course( 2020)In recent years, the issue of improving teaching and learning quality in higher education has received many concerns from the stakeholders. An example of this phenomenon is the trend of registering for different kinds of quality accreditation, such as National Standard Accreditation, and the Asian University Network Quality Assurance. Following up this trend, constructive alignment has arisen as an effective tool as well as a “must” in the process of quality assurance. This study aims at taking a look at a course designed under the format of Asian University Network Quality Assurance – Speaking class for English majors. To address this issue, a small-scale qualitative case study is conducted within 10 weeks in order to answer the question of whether constructive alignment exists in the real classroom situation. A class of 30 students and their lecturer are involved in the study. After analyzing the data from both classroom observations and interviews, the researcher finds that constructive alignment is not fully implemented in the classroom. Specifically, there are some misalignments between intended learning outcomes and teaching and learning activities and assessment tasks, negatively affecting the implementation.
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PublicationEnhancing Pronunciation for Non English Major Students by Employing Hybrid Learning from Students' Perspective.( 2020)Hybrid learning has been well-recognized in language learning and teaching as it brings abundant opportunities for language practice, especially in higher education. At tertiary level, learners still face challenges and anxiety regarding pronunciation. Therefore, the research aimed to explore learner’s perceptions after experiencing hybrid learning in learning and practicing pronunciation. Open-ended questionnaire and semi-structured interview were employed in this research to discover the attitude of 58 students, regarding to their behavioral engagement and emotional engagement. Besides, benefits and challenges emerged in the process of blending learning were also examined. According to the result, a large number of learners expressed a very positive attitude towards blended learning, confirming the gain in their motivation and engagement. Some benefits and challenges of hybrid learning was also discussed through the eyes of learners
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PublicationTHEORETICAL INVESTIGATION OF THE MOLECULAR STRUCTURAL PROPERTIES OF CHLOROQUINE, A DRUG TO TREAT CORONAVIRUS DISEASE 2019 THROUGH QTAIM, NBO, HOMO LUMO ENERGIES AND MOLECULAR DOCKING MODELING STUDIES( 2020)In this work, the molecular structures and vibrational spectra analysis of Chloroquine have been reported by Density Functional Theory calculations at B3LYP/6-311++G(2d,2p) level of theory. Intermolecular interactions were analyzed by AIM and NBO. Moreover, frontier molecular orbitals and molecular electrostatic potential (MEP) have been reported. Finally, using the molecular docking technique, molecular docking study was performed using MOE 2015.10. We report the inhibitory effect of the title compound on the host receptor angiotensin-converting enzyme 2 (ACE2) protein in the human body that leads to a crucial foundation about coronavirus resistance of title compounds on the main protease (PDB6LU7) protein of SARS-CoV-2. Results indicated that molecular docking simulation predicted the docking score (DS) > -10kcal.mol-1 with significant intermolecular interaction at the catalytic triad or dyad (Arg 393, Phe 390, and Phe 40 of ACE2 protein; Cys 145, Phe 140, His 41, and Glu 166 of PDB6LU7 protein) and other essential substrate-binding residues of SARSCoV-2 MPro. Therefore, Chloroquine may be considered to be a potent inhibitor of main protease protein SARSCoV-2 but need to be explored for the further drug development process.
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PublicationUsing Quizlet to Enhance Vocabulary Acquisition of Non English Major Freshmen( 2020)Among numerous applications which have been developed to help students improve their vocabulary, Quizlet is a useful tool which students can use on their laptops or download freely on their phones. As many researches have found significant improvement in students who use Quizlet for their vocabulary training, this paper aims to find out whether Quizlet can also enhance the vocabulary acquisition of Vietnamese non-English major freshmen at Van Lang university, and what their attitudes towards this tool are. The study involved 60 students which were selected according to a Two-group Quasi-Experimental Design: experimental and control groups. A regular teaching approach was applied to both groups for the first 5 weeks, then Quizlet was presented to the experimental group while no change of teaching method was given to those in the control group for the next 5 weeks. A pretest and post-test were conducted to compare the students’ performance in two groups before and after using Quizlet. At the end of the course, a survey was carried out to experimental students to learn their views of Quizlet. Some pedagogical recommendations for teaching vocabulary with Quizlet were also provided. After analyzing the results, it was found out that the students in the experimental groups made significantly more progress than those in the control group. Additionally, the survey also showed that the students were willing to use Quizlet to improve their vocabulary in the future.
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PublicationKhoảng cách kỳ vọng trên báo cáo kiểm toán: trường hợp nghiên cứu tại Tp.Hồ Chí Minh( 2020)Nghiên cứu này nhằm mục đích kiểm tra xem có sự khác biệt trong cách hiểu giữa các kiểm toán viên (KTV) và hai nhóm người sử dụng về những thông điệp được truyền tải trên báo cáo kiểm toán (BCKT) và từ đó có thể đưa ra các kiến nghị cần thiết giúp loại bỏ hoặc thu hẹp khoảng cách này nhằm mục địch nâng caao vai trò và giấ trị của BCKT đối với người sử dụng.
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PublicationInfluence of executive supervision, asses risks and control activities on internal control of Vietnamese commercial Banks( 2020)The internal control system of commercial banks has become increasingly meaningful in the stable and sustainable development of the national financial system over the past time. In order to evaluate of internal control systems in the practical application of Vietnamese commercial banks, the authors conducted empirical research with 382 experts of most commercial banks in Vietnam. The results show that the internal control system of commercial banks has certain effects but still some shortcomings in each component. Thereby, the authors proposed a number of policy suggestions to develop internal control system of Vietnamese commercial banks to ensure efficiency to meet regional and international integration trends.
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PublicationIntegrated reporting Necessity of Vietnamese Enterprises in the context of International Economic Integration( 2020)The international integration context requires the enterprises to comply with the regulations in the presentation of information in financial statements. One of the trends in information integration to help users get useful is integration reporting. The article is based on surveying the managers of enterprises to analyze and evaluate to get an overview of issues related to integrated reporting. The paper supports Vietnamese enterprises to look more comprehensively about the quality of information to have careful preparations for implementation. This also contributes to improving the quality of accounting information for Vietnamese enterprises in the international economic integration.
