Simulating of Biofuel Production from Rice Husks

In the context of energy crisis and environmental damage due to rapid depletion and overuse of fossil fuel, alternative renewable energy resources such as biomass have been being significantly studied recently. In Southeast Asia countries like Malaysia, one of the abundant biomass feed stocks is rice husk which is a residue from rice production process. Rice husk can be transformed into gasoline through a series of fast pyrolysis and catalytic cracking processes. However, there is limited work on simulating the whole process. The objective of this project is to develop a mathematical simulation for the production of gasoline from rice husk using MATLAB. From the developed model, parametric studies have been conducted to identify the operating conditions which give the highest yield of product. The mathematic model was based on kinetic equations for the two main processes together with basic mass and energy balance for other subprocesses in the flowsheet. As a result, the model has shown that from 1000kg of rice husk, 191 liters of gasoline would be obtained. Within the studied range, the operating conditions at temperature of 783K and residence time of 5s for pyrolysis and at 723K in 1.25h for catalytic cracking are proposed to get the highest gasoline yield. The developed model can be considered as a basis for further research on simulating the production process of biofuel from rice husk

Two-way Acquisition Analysis on Chinese-Vietnamese Appulsive Structure

越南语里到现在还存在着汉语的痕迹，虽然现在越南语不使用汉字了，但是除了汉字之外，语法，特别是词汇都似乎离不开汉语的影响。由此可见汉语和越南语似乎大同小异的。虽然不论中国人学越南语还是越南人学汉语刚开始都有容易掌握的感觉。但实际上却相反，在学一门外语的过程中，他们也同样犯了不少的错误，有的是客观的，有的是主观的，这是不可避免的现象。 越南学生在与汉语有共同之处的越南语的基础下学习汉语的过程中会不自觉地对目的语–汉语偏离，以汉语为标准表现出来的错误或不完善之处，渐渐这些错误成为系统的、有规律的，学生在发生错误之后如果无法进行改正，将对他们的语言能力引起不良的影响。而且，对越南学生来说，汉语语法中...Abstract In the Vietnamese language, now there is still traces of the Chinese language. Although at present the Vietnamese language did not use the Chinese character, besides the Chinese character, the grammar, especially the vocabulary seems to be inseparable from the Chinese influence. Thus Chinese and Vietnamese seem mostly the same except for minor differences. Chinese people who learn Vietn...学位：教育硕士院系专业：海外教育学院_汉语国际教育硕士学号：2652010115439

THE RELATIONSHIP BETWEEN PUBLIC SERVICE MOTIVATION, WORK ENJOYMENT, AND TASK PERFORMANCE: A PRELIMINARY STUDY OF HEALTHCARE WORKERS IN VIETNAM

This study aimed to examine the impact of health workers' public service motivation during their participation in response to the Covid-19 pandemic at a time of the highest number of infections and deaths in Vietnam. This study was conducted through a cross-sectional survey using an intentional sampling technique (n=200). In addition, Structural Equation Modeling (SEM) was applied to illustrate the proposed hypotheses. We found that compassion in the workplace, self-sacrifice, and attraction to policy-making impacted work enjoyment positively and significantly. In particular, there was a positive and significant relationship between work enjoyment and task performance but no evidence of the relationship between Commitment to the public interest and work enjoyment. This study further demonstrates the importance of public service motivation of health workers in pandemic response, as previous studies have found. This finding suggests that the government and policymakers in Vietnam should develop policies to promote health workers' public service motivation during their engagement in response to the health crisis.&nbsp

WILL OF PRESIDENT HO CHI MINH CITY FOR THE LEARNING AND ETHICAL TRAINING OF STUDENTS OF THE NATIONAL ACADEMY OF ADMINISTRATION

Learning the revolutionary ethics of President Ho Chi Minh is learning the struggle and training yourself for noble revolutionaryideals; learning and following the ideology of solidarity; learning the will to fight in the spirit of radical revolution; continuous attack;learning deep sympathy for the people, for each person; learn a burning hatred for wicked, greedy, and selfish people; learn a firmbelief in the power of the masses; learn ideology, spirit, will, motto, method, labor perspective, learn frugality, integrity, impartiality,learn diligence, simplicity, purity and health in life

Simulating of Biofuel Production from Rice Husks

In the context of energy crisis and environmental damage due to rapid depletion and overuse of fossil fuel, alternative renewable energy resources such as biomass have been being significantly studied recently. In Southeast Asia countries like Malaysia, one of the abundant biomass feed stocks is rice husk which is a residue from rice production process. Rice husk can be transformed into gasoline through a series of fast pyrolysis and catalytic cracking processes. However, there is limited work on simulating the whole process. The objective of this project is to develop a mathematical simulation for the production of gasoline from rice husk using MATLAB. From the developed model, parametric studies have been conducted to identify the operating conditions which give the highest yield of product. The mathematic model was based on kinetic equations for the two main processes together with basic mass and energy balance for other subprocesses in the flowsheet. As a result, the model has shown that from 1000kg of rice husk, 191 liters of gasoline would be obtained. Within the studied range, the operating conditions at temperature of 783K and residence time of 5s for pyrolysis and at 723K in 1.25h for catalytic cracking are proposed to get the highest gasoline yield. The developed model can be considered as a basis for further research on simulating the production process of biofuel from rice husk

Assessment of blasted excavation inaccuracy at tunnel face and influences on tunnelling effectiveness

Blasting has been the most effective solution for tunnel excavation in hard rock. The accuracy of the blasting works is demonstrated by the similarity between the design and the actual excavation boundary. Hence, the overbreak and underbreak of the tunnel boundary are used to evaluate the tunnel excavation. Widely applied for rock tunnelling, New Austrian Tunnelling Method (NATM) has been used for almost all highway tunnels in Vietnam. The assessment of the previous projects is essential since it provides learnt experiences and enriches the knowledge to handle the tunnelling technology. With this aim, the paper studied the case of a 500m NATM tunnel located on the N01 national highway in Central Vietnam. The practical excavation zone was examined, and the overbreak and underbreak of the tunnel boundary during the excavation by explosive was investigated. The dependences of the overbreak and underbreak on the geological and technical conditions were indicated. The tunnelling effectiveness was then assessed through the additional materials and works for the face correction activities

Assessment of blasted excavation inaccuracy at tunnel face and influences on tunnelling effectiveness

Blasting has been the most effective solution for tunnel excavation in hard rock. The accuracy of the blasting works is demonstrated by the similarity between the design and the actual excavation boundary. Hence, the overbreak and underbreak of the tunnel boundary are used to evaluate the tunnel excavation. Widely applied for rock tunnelling, New Austrian Tunnelling Method (NATM) has been used for almost all highway tunnels in Vietnam. The assessment of the previous projects is essential since it provides learnt experiences and enriches the knowledge to handle the tunnelling technology. With this aim, the paper studied the case of a 500m NATM tunnel located on the N01 national highway in Central Vietnam. The practical excavation zone was examined, and the overbreak and underbreak of the tunnel boundary during the excavation by explosive was investigated. The dependences of the overbreak and underbreak on the geological and technical conditions were indicated. The tunnelling effectiveness was then assessed through the additional materials and works for the face correction activities

USING RUBRIC TO ASSESS PRIMARY SCHOOL STUDENTS' COMPETENCE IN TEACHING SCIENCE IN VIETNAM

Vietnam is in the early stages of implementing the reform of the curriculum and textbooks. Vietnam's general education is changing strongly from content-based teaching to competence-building teaching [1]. That change has been implemented by researchers and teachers in all elements of the teaching process, including testing and evaluation. Evaluation of educational outcomes needs to shift from testing memorization to assessing the ability to apply knowledge to solve practical problems, attaching importance to both assessment of learning outcomes and assessment in the learning process. In this situation, testing and assessment in teaching Science in primary schools are also interesting to many teachers, and assessment of scientific competence in teaching this subject is considered an important factor contributing to improving the quality of Science and the quality of subject teaching in the direction of developing students' ability. The article mentions some theoretical foundations and the actual situation of using Rubric in assessing the scientific competence of students in grades 4 and 5 when teachers teach Science, thereby proposing some measures to improve the effectiveness of assessment in teaching this subject.  Article visualizations

Level of Corporate Social Responsibility Disclosure and Financial Performance: A Case Study in Ho Chi Minh City, Vietnam

Research aims: This study examines the influence of firm size, firm age, current ratio, and type of audit company on the corporate social responsibility disclosure level and its impact on the financial performance of listed enterprises in Vietnam.Design/Methodology/Approach: Financial data were collected from the annual reports of 109 enterprises listed on the Ho Chi Minh City Stock Exchange, Vietnam, from 2016 to 2020. This research employed the Random Effects Model (REM), Fixed Effects Model (FEM), and Feasible Generalized Least Squares (FGLS) to deal with the drawbacks of the regression models, as mentioned.Research findings: The findings support the positive influence of firm size, firm age, and the type of auditing firm on the level of CSR information disclosure of listed manufacturing enterprises. Also, the extent of CSR disclosure positively affected financial performance, confirming the positive relationship between CSR disclosure level and financial performance.Theoretical contribution/Originality: This study contributes to governance theory by expanding and combining stakeholder and legitimacy theories with criteria for measuring the level of CSR disclosure in the Vietnamese context. Therefore, the study results are a valuable reference for theorists who tirelessly pursue the CSR topic.Practitioner/Policy implication: This study proposes recommendations for practitioners who should focus on enhancing the level of CSR disclosure to generate more benefits and result in better financial performance. Also, policy implications should be raising the senior managers’ awareness of the level of CSR disclosure, firm size, firm age, and type of audit and establishing a stable legal framework for the level of CSR disclosure in line with international standards and practices.Research limitation/Implication: The sample data were only collected from manufacturing companies listed on Ho Chi Minh Stock Exchange, and the analyzed content and measurement of the level of CSR disclosure primely relied on the enterprises’ annual reports