https://hdujs.edu.vn/index.php/js <p>Hong Duc University Journal of Science is the press agency established under the Operating Licence No.14/MIC-OL, dated on January 1st, 2009 and No.125/MIC-OL reissue dated on April 10th, 2014 by the Ministry of Information and Communications. Since 2014, Hong Duc University Journal of Science has been allowed to increase the number periodically to 6 volumes a year in both English and Vietnamese under the International Standard Serial Number: ISSN 1859 - 2759 (for Vietnamesse issue), and ISSN 2588 - 1523 (for English issue) approved by National Agency for Science and Technology Information. Hong Duc University Journal of Science in English is the press reflecting educational and training activities; publishing works, scientific studies of staff, faculties, students, scientists inside and outside the school; propagating and disseminating the policy guidelines and policies of the Party and the State on education and training; introducing, exchanging research results, the application of science and technology in the country and internationally. Editorial Board would like to receive the contribution of numerous faculty members, research scholars, scientists inside and outside the school to Hong Duc University Journal of Science so that we could bring readers the better results, useful information and scientific value.</p> <p>EDITORIAL BOARD</p> Tạp chí Khoa học Trường Đại học Hồng Đức en-US Hong Duc University Journal of Science 3030-4768 https://hdujs.edu.vn/index.php/js/article/view/1013 In this paper, we prove a Massera-type theorem for the asymptotic periodicity of bounded solutions to non-densely defined differential equations with infinite delay, using the circular spectral theory of functions. TS Anh Minh Le Thi Thu Nguyen Thanh Tra Nguyen Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 137 144 10.70117/hdujs.E11.7.2026.1013 https://hdujs.edu.vn/index.php/js/article/view/1127 In this paper, we study Hyers–Ulam stability, well-posedness, and data dependence for mappings satisfying a Fisher-type inequality. Assuming that the mapping has a fixed point , we first show that the Fisher-type inequality implies the unique-preimage property . This structural property yields the global residual estimate , , where is the Fisher parameter. Consequently, Hyers–Ulam stability and well-posedness follow in an arbitrary metric space, without compactness, completeness, or continuity assumptions. Data dependence is treated separately: if a perturbed mapping has a fixed point and satisfies for all , then . Combining these abstract estimates with the fixed point theorems in [10], we obtain existence, uniqueness, convergence, and stability conclusions in boundedly compact and -orbitally compact metric spaces, and in complete metric spaces under an additional asymptotic condition. Finally, we present an example of a discontinuous mapping, together with numerical illustrations. Huu Hoc Nguyen Thi Thu Nguyen Tran Nam Anh Bui Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 39 50 10.70117/hdujs.E11.7.2026.1127 https://hdujs.edu.vn/index.php/js/article/view/1067 This study explores the impact of video length on English language acquisition among 112 English-major students from Tay Nguyen University. Using a mixed-methods design, the research compares short-form TikTok and long-form YouTube videos to determine their effects on learners’ motivation, vocabulary, listening comprehension, and overall engagement. Findings indicate that TikTok videos enhance motivation, short-term engagement, and quick vocabulary recall, while YouTube videos support structured study habits, contextual understanding, and long-term listening comprehension. The results highlight that combining short and long video formats can optimize language exposure, sustain learner motivation, and promote autonomy. The study suggests that educators integrate both video types strategically to balance motivation with depth in English language instruction. Binh An Truong Phuong Thao Nguyen Thi Hong Ngoc Nguyen Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 5 12 10.70117/hdujs.E11.7.2026.1067 https://hdujs.edu.vn/index.php/js/article/view/1087 Arachis hypogaea L. ‘Sen’ is a local peanut cultivar that exhibits desirable agronomic traits to be a promising crop in Nghe An province. The present study aimed to evaluate the antioxidant responses of Sen plants under drought conditions. Drought triggered oxidative stress that was recorded by a burst of superoxide anion radical (O2.-) and hydrogen peroxide (H2O2) in Sen peanut leaves. A progressive enhancement in the activities of antioxidative enzymes, including superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX), was consistently observed throughout the experiment, effectively facilitating the detoxification of excess endogenous O2.- and H2O2. Furthermore, an increased accumulation of proline appeared to be part of the defense mechanism of Arachis hypogaea L. ‘Sen’ against oxidative stress caused by drought. Van Chung Mai MSc student Vongdananthaphanh Minlavanh Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 13 19 10.70117/hdujs.E11.7.2026.1087 https://hdujs.edu.vn/index.php/js/article/view/1133 A novel quinoline derivative, 6-hydroxy-3-sulfoquinoline-7-yloxyacetic acid (Q), was successfully synthesized from eugenol, a major component of basil essential oil. Its corresponding complexes [Mn(C₁₁H₇O₇NS)(H₂O)₂]·H₂O (B1), [Cu(C11H6O7NS)(H2O)2].H2O (B2) were obtained through direct coordination between Mn²⁺, Cu²⁺ and ligand Q. The proposed structure of B1, B2 were elucidated based on a comprehensive analysis of EDX, ESI-MS, IR spectroscopy, and thermal gravimetric data. In these complexes, the ligand Q coordinated to the Mn(II) center via the oxygen of OH phenol group, H2O and O of COO group, resulting in a stable four-coordinate environment. The results of the antimicrobial activity test of the B1and B2omplexes showed that both complexes had high activity against Bacillus subtilis and Lactobacillus fermentum strains, corresponding to low IC50 values ​​ranging from 2.58 to 10.81 μg/mL. TS Thị Ngọc Vinh Nguyễn Th.S Hong Nam Vu Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1167 This study investigates the impact of picture-based writing tasks on improving Grade 5 students’ sentence construction skills in a Vietnamese primary school context. A quasi-experimental design was employed, including pre- and post-writing tests and analysis of students’ written products. Preliminary findings indicate that many students struggle to produce correct and meaningful sentences. To address these challenges, the study proposes the systematic use of picture-based writing tasks to support idea generation and sentence organization. The further findings are expected to provide practical implications for primary English teachers seeking effective strategies to support young learners’ sentence construction skills. Khánh Huyền Bá TS Thi Quyet Nguyen Copyright (c) 2026 Hong Duc University Journal of Science 10.70117/hdujs.E11.7.2026.1167 https://hdujs.edu.vn/index.php/js/article/view/1171 In this paper, we study the Gevrey regularity of solutions to the three-dimensional generalized Navier-Stokes equations with fractional Voigt regularization. Our result improves and extends previous ones. Tran Tinh Le Thi Cuc Pham Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1182 This study investigates EFL learners’ responses to AI-aided listening materials at a private English center in Vietnam. Thirty-five B1-level students participated in a 12-week course integrating AI-supported materials with regular instruction. Data from a questionnaire and interviews revealed generally positive perceptions of the AI-aided materials, which helped reduce listening difficulty and anxiety. AI-assisted videos that combined audio and visual support helped students understand better and feel more confident when they were listening. Overall, the findings suggest that AI-aided listening materials can effectively support EFL instruction when thoughtfully integrated into teacher-guided practice. Thị Nguyên Hồ TS Thi Quyet Nguyen Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1192 This study examines the current state of social interaction skill education for children aged 5–6 with mild intellectual disabilities through STEAM activities in preschools. Employing a mixed-methods research approach involving 125 preschool teachers, the findings reveal a significant discrepancy between perception and practice. While educators demonstrate high awareness of the role of STEAM, their pedagogical efficacy in organizing activities and providing practical support remains limited, particularly regarding the differentiation of tasks for children with disabilities. On the students' side, social interaction skills range from low to near-average levels. While these children perform relatively well in foundational skills such as sharing materials and coordinated actions, they face substantial challenges in proactive communication and conflict resolution. The research highlights a "theory-practice gap" and emphasizes the urgent need for structured interaction scripts and visual supports in inclusive education settings. TS Sy Hung Ho Phuong Thao Nguyen Thi Cam Van Nguyen Thi Ha Vu Thi Thao Ngo Thi Thanh Tam Nguyen Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 60 70 10.70117/hdujs.E11.7.2026.1192 https://hdujs.edu.vn/index.php/js/article/view/1199 The aim of this research is to identify suitable areas for green pepper crop production in Quang Ngoc commune, Thanh Hoa Province. Land suitability evaluation is crucial for local farmers to assess the capacity and constraints of current land conditions in order to support the development of appropriate land-use plans in the future. In this study, the limitation method regarding number and intensity of limitations was used to evaluate the suitability levelsfor green pepper crop. The results indicate that the most significant limiting factors consist of organic matter (OM), soil pH, soil texture, shallow soil depth, and relative topography, occurring either independently or in combination. Furthermore, the findings suggest that the proposed methodology for assessing the number and intensity of limitations is applicable and replicable across diverse regions and for various agricultural crops. Huu Hao Nguyen Thi Loan Nguyen Huu Hung Pham Thi Thanh Binh Pham Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 29 38 10.70117/hdujs.E11.7.2026.1199 https://hdujs.edu.vn/index.php/js/article/view/1195 This paper proposes novel sufficient conditions for establishing h-stability and synthesizing con trollers for linear continuous-time singular systems. The analysis is carried out through the Lyapunov Krasovskii functional method, offering a generalized perspective of exponential stability. To demonstrate the effectiveness of the proposed approach, several numerical examples are presented. TS Huy Vu Le Quynh Le Nhu Tinh Le Tran Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1321 This study examines the effects of spaced and massed practice on vocabulary learning and retention among third-year English majors at Hong Duc University. Grounded in the spacing effect, it compares two conditions: intensive single-session practice and distributed practice across sessions. Participants learned 60 target words, evenly divided between conditions. Vocabulary knowledge was measured through immediate and four-week delayed tests, assessing both recognition and recall. Questionnaire data explored learner perceptions. Results show that spaced practice significantly improved long-term retention, whereas massed practice led to greater decline over time. The advantage of spaced learning was consistent across word types and learner preferences, highlighting its pedagogical value in tertiary EFL contexts. Hong Nhung Le MA Thi Ha Nguyen MA Thi Loan Do MA Thi Loan Ngo Bachelor Viet Hoai Nam Le Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1357 Lung nodule detection in CT scans remains a challenging computer vision task due to structural ambiguity and limited annotations. This paper introduces I3DR-Net, a one-stage 3D deep learning framework for joint detection and classification. The model combines a pre-trained I3D backbone for spatio-temporal feature extraction with a modified FPN for enhanced multi-scale representation. Experimental results show competitive performance (≈70–73% accuracy), demonstrating that transfer learning and improved pyramid design effectively enhance detection robustness for computer-aided diagnosis applications. Anh Duc Pham Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 20 28 10.70117/hdujs.E11.7.2026.1357 https://hdujs.edu.vn/index.php/js/article/view/1355 This study investigates the effectiveness of Memrise in improving French vocabulary proficiency among second-year students at the Faculty of Foreign Languages, Hong Duc University. A quasi-experimental design was employed with 80 second-year students, consisting of an experimental group (n = 40) using Memrise and a control group (n = 40) receiving traditional vocabulary instruction. The intervention lasted six weeks. At the end of the intervention, The results of a comprehensive French vocabulary test assessing their vocabulary knowledge and ability to use words in context showed that the experimental group achieved a higher mean score of 82.6, compared with 71.4 for the control group. These results suggest that integrating Memrise into French vocabulary instruction may enhance students’ vocabulary proficiency and contextual use of newly learned words. The findings highlight the potential of technology-assisted learning as a complementary approach to traditional foreign language vocabulary teaching and learning. Cam Xuan Trinh Th.S Truong Thi Minh Trương Th.S Le Thi Ngoc Anh Le Th.S Luc Thi My Binh Luc Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1388 This study explores second-year students’ perceptions of ChatGPT in English speaking practice at the Faculty of Foreign Languages, Hong Duc University. Using a mixed-methods design, the research collected questionnaire data from 100 students and interview data from 12 participants. The study examined five dimensions: ways of applying ChatGPT, perceived usefulness, convenience, limitations, and appropriateness. The findings show that students generally viewed ChatGPT positively, especially for preparation and out-of-class support. They often used it to prepare vocabulary, organize responses, and practise dialogues. However, they also pointed out limitations such as inaccurate answers, unnatural language, and overdependence. The study suggests that ChatGPT can support speaking practice, but should be used as a supplementary tool rather than a replacement for real interaction. Minh Huyen Le Ph.D. Thi Quyet Nguyen Copyright (c) 2026 Hong Duc University Journal of Science 10.70117/hdujs.E11.7.2026.1388 https://hdujs.edu.vn/index.php/js/article/view/1343 This study investigates final year pre-service EFL teachers’ responses to the recent educational reform regarding the introduction of English as a second language in schools in Vietnam. A quantitative survey design was employed. Data were collected from 127 pre-service EFL teachers at Hong Duc University through a structured questionnaire. The findings show that the participants had a high level of awareness; however, their attitudes were somewhat mixed. Their professional readiness was only moderate. The open-ended responses further revealed that students were particularly concerned about the lack of practical teaching experience, unclear reform requirements, and the challenges of implementing English-rich classroom practices. Thi Ngoc Nguyen MA Thi Mai Du MA Thi Thanh Huyen Do MA Ha Trang Thieu Huyen Trang Nghiem Copyright (c) 2026 Hong Duc University Journal of Science 10.70117/hdujs.E11.7.2026.1343 https://hdujs.edu.vn/index.php/js/article/view/1390 This study proposes a novel bilayer ZnS-8-16 porous nanosheet and investigates its transition between cage-like (ZnS-8-16-C) and planar (ZnS-8-16-P) configurations. Using the DFTB+ method, phonon dispersion calculations reveal that the planar phase is dynamically stable, while the cage-like form exhibits vibrational instability. Under in-plane tensile loading, a structural transition from the cage-like to the planar configuration is observed. This geometric reconfiguration significantly modifies the electronic band structure, driving an indirect-to-direct gap transition. Our findings highlight the role of vibrational stability in strain-induced transitions, providing a route for tuning the electronic properties of 2D porous ZnS systems. Thảo Nguyễn TS Dung Nguyen PGS.TS Hai Tran Ths Ngoc Thi Nguyen Copyright (c) 2026 Hong Duc University Journal of Science https://hdujs.edu.vn/index.php/js/article/view/1338 This study investigates the impact of the Parroto mobile application on students’ listening comprehension and their experiences with AI-supported dictation. A total of 106 first-year non-English majors were divided into experimental and control groups. Data were collected through pre-tests, post-tests, questionnaires, and interviews using a mixed-methods design. Results show that the experimental group improved more in listening performance than the control group. Dictation activities helped learners focus better on spoken input and improve sound and word recognition. Students reported positive experiences, especially regarding usability, structure, and immediate feedback. Th.S Thi Huong Le Thi Thuy Ngan Nguyen Thi Thanh Huong Le Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 71 78 10.70117/hdujs.E11.7.2026.1338 https://hdujs.edu.vn/index.php/js/article/view/1372 This paper introduces the Flying Sidekick Traveling Salesman Problem with JetSuite (FSTSP-JS), a heterogeneous last-mile delivery problem involving a truck, a standard drone, and a human-piloted JetSuite. The drone can perform flexible launch-and-recovery sorties, whereas the JetSuite performs stationary loop sorties that require the truck to wait at the launch node. We propose a compact three-index stage-based mixed-integer linear programming formulation to minimize the route makespan. Computational results on 180 instances with 10 customers show that FSTSP-JS reduces the average makespan by 21.3% and requires less average solution time than the classical truck-drone FSTSP baseline. ThS Le Thi Hong Le SV Dat Nguyen Tran Quoc TS Cong Nguyen Dinh TS Minh Vu Duc Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 51 59 10.70117/hdujs.E11.7.2026.1372 https://hdujs.edu.vn/index.php/js/article/view/1395 Microchannel heat sinks have attracted significant attention for advanced thermal management of high–heat-flux devices, where enhancement of heat transfer performance remains a critical challenge. In this study, a detailed thermal analysis of nanofluid flow and heat transfer in asymmetric spider-web microchannel heat sinks is presented using a three-dimensional numerical framework. The effects of microchannel geometric asymmetry and nanofluid properties on convective heat transfer characteristics are systematically investigated. The governing continuity, momentum, and energy equations are solved to evaluate key thermal performance indicators, including the Nusselt number, temperature distribution, and thermal resistance, over a range of Reynolds numbers and nanoparticle volume fractions. Numerical validation is achieved through grid independence analysis and comparison with established heat transfer correlations reported in the literature. The results demonstrate that the asymmetric spider-web configuration promotes enhanced thermal mixing and temperature uniformity, leading to improved heat transfer performance compared to conventional microchannel designs. The use of nanofluids further intensifies convective heat transfer, although at the expense of increased pressure drop. The present study provides physical insight into the coupled effects of geometry-induced flow redistribution and nanofluid-enhanced thermal transport, offering useful guidance for the thermal design of micro-scale heat dissipation systems. Sy Ky Vu Phuong Hao Le Thi Tham Nguyen Thi Ha Pham Dinh Thi Luu Viet Anh Le Copyright (c) 2026 Hong Duc University Journal of Science 2026-07-30 2026-07-30 97 106 10.70117/hdujs.E11.7.2026.1395