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(2025) Trịnh, Thị Hồng; Nguyễn, Công Hợi

Tài liệu giảng dạy giới thiệu các kiến thức nền tảng về mạch điện, dòng điện xoay chiều một pha – ba pha, linh kiện điện tử, máy điện và an toàn điện dành cho sinh viên khối ngành Công nghệ kỹ thuật hóa học. Nội dung được trình bày thành 7 chương, kết hợp lý thuyết và thực hành, giúp người học hiểu nguyên lý, phương pháp tính toán và ứng dụng các hiện tượng điện từ trong sản xuất và đời sống. Học phần yêu cầu nền tảng từ Vật lý đại cương A1 và A2 và hướng đến việc nâng cao kỹ năng thực hành nghề nghiệp.

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Comparative analysis of E-government development status of ASEAN member states: Accomplishments and challenges

(2025) Tissayakorn, Kittipong

E-government enhances efficiency, transparency, participation, and democracy through technology. Recent decades have seen global advancements in E-government, especially in the Asia-Pacific region. This study assesses E-government development of 10 ASEAN countries and their global standings. It relies on data from the United Nations E-government Survey (2014–2024), and the key performance metrics of E-government progression include the E-Government Development Index (EGDI) and the E-participation Index (EPI). The findings reveal that the EGDI of Brunei, Indonesia, Malaysia, the Philippines, Singapore, Thailand, and Vietnam has significantly improved over the past decade, while Cambodia, Laos, and Myanmar have achieved moderate gains in EGDI. Additionally, Indonesia, Singapore, and Thailand have made significant progress in EPI during the same period, while most ASEAN countries have achieved moderate improvements in citizen engagement. The common E-government challenges facing most countries in the ASEAN bloc are inadequate internet access, low digital literacy, digital divides, and public distrust in digital platforms. Policymakers must prioritize investments in digital infrastructure to expand broadband access and bridge urban-rural divides. Additionally, resources should be allocated for enhancing digital literacy through educational initiatives. Moreover, updated cybersecurity and data protection laws are essential to fostering public trust in digital platforms. This study is the first to comprehensively compare E-government development and performance across all 10 ASEAN countries over the past decade. It provides insights into regional convergence and divergence through a mixed-methods approach.

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Benchmarking Vietnam’s regions: A standardized indicator-based comparison of ecological sustainability

(2025) Phan, Thi Thanh Nhan; Hufnagel, Levente

Ecological sustainability is a pressing challenge, yet its evaluation remains hindered by fragmented indicators, low regional comparability, and limited attention to long-run progress. Addressing these shortcomings requires standardized frameworks that can capture both spatial variation and temporal change. For the purposes of correcting these deficits, this paper develops a standardized indicator-based approach suited to Vietnam, an emerging economy country that is suffering from critical ecological stresses. Eleven indicators are designed based on the ecological dimensions of the SDGs, analyzed with principal component and cluster analysis to examine regional performance from 2012 to 2022. The results reveal ongoing disparities and uneven progress, emphasizing the complexity of sustainability transitions in rapidly growing areas. Beyond Vietnam, the proposed framework illustrates how spatial–temporal benchmarking can bridge global sustainability agendas with local policy needs. By strengthening consistency and comparability, it provides applicable tools that can inform more balanced and context-sensitive sustainability strategies.

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Model for calculating refractive index from energy gap for binary and ternary chalcopyrite semiconductors

(2025-11) Umar, Farooque; Tarique, Rashid; Ajay, Kumar; Shadab, Rabbani; Faiz, Ahmad

Based on the energy gap (Eg) data, a simple model has been proposed for the calculation of refractive index (n) of the binary semiconductors, oxides, halides, insulators, and ternary chalcopyrite semiconductors of AIBIIICIV2 , and AIBIIICIV2 families. The refractive index values of the above-mentioned semiconductor materials have been calculated by utilizing the proposed model. Further, the reported values of the refractive index by different models in the literature for the considered semiconductor materials have also been mentioned for the comparison purpose. Moreover, the values of the average percentage deviations have been calculated for all models. The obtained values of the average percentage deviation for the proposed model is almost lowest compared to that of the reported models. Additionally, most of the reported models have not mentioned the values of refractive index for different semiconductor materials, while the proposed model has been utilized to calculate the values of refractive index for a wide range of semiconductor materials. Thus, it validates the suitability of our proposed model in the estimation of refractive index values of different technologically important materials.

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Assessment of influencing factors and development directions for economic growth through community-based tourism of ethnic minorities: A case study of Dien Bien and Cao Bang, Vietnam

(2025) Ho, XInh Luong; Nguyen, Van Quang

Dien Bien and Cao Bang are two mountainous provinces in the north of Vietnam that have diverse ethnic profiles and great potential for community -based tourism (CBT), which is inherent with been numerous challenges in the association between ethnic minorities and economic development. Thus, this study was to identify key factors affecting the success of CBT and provide recommendations for enhancing sustainability in these regions. Qualitative and quantitative data were collected through other literature from both studies and official documents and field surveys conducted among local residents, tourists, and key stakeholders. The data were then analyzed using regression and thematic analysis to determine the most influential factors. Results indicated that economic factors including income stability and equitable income distribution were the most significant determinants of CBT success. Cultural preservation and quality of life improvements were also as critical as environmental sustainability supported by effective waste management and government policies. Finally, community engagement and development policies were least influential. It was deduced that for the development of CBT in Dien Bien and Cao Bang, the stakeholders should focus on stabilizing income, preserving cultural heritage, and enhancing environmental sustainability through targeted policies and community engagement.

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Vibrations of cracked FGM microbeams based on Modified Coupled Stress Theory

(2025-11) Chu, Thanh Binh; Tran, Van Lien

Free vibrations of cracked microbeams made of Functionally Graded Material (FGM) rested on the Winkler-Pasternak elastic foundation based on the Modified Coupled Stress Theory (MCST) are presented. Material properties of the beam vary throughout the thickness according to the power distribution and the Mori–Tanaka homogenization technique. The Timoshenko beam theory considering the size effect based on the MCST is applied. A sizedependent finite element model with new non-classical shape functions is proposed to obtain the stiffness and mass matrices of the intact FGM Timoshenko microbeam. The stiffness matrix of the cracked beam element obtained by adding an overall additional flexibility matrix to the flexibility matrix of the corresponding intact beam element can give more accurate natural frequencies. The influences of the size-effect, material, geometry, and crack parameters on natural frequencies and mode shapes are then analyzed. It is shown that the study results can be applied to other FGMs as well as more complex microbeam structures.

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