Ho Chi Minh City Open University Journal of Science
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Influence of Heat Treatment Temperature on Phase Transformation Behavior and Mechanical Performance of Ti50Ni39Zr10Nb1 SMA
No full textThe effect of COPD stage on self-care management in COPD Patients: The mediating role of illness perception
No full textBackground: Determining the stage of COPD is essential for disease prognosis and management. Self-care management is among the basic elements of non-pharmacological treatment in COPD patients and is associated with illness perception. Objective: The current study aimed to investigate the mediating role of illness perception in the relationship between COPD stage and self-care management. Methods: The research was conducted in the chest diseases outpatient clinic of a hospital located in the eastern Mediterranean region between July 2024 and January 2025. The cross-sectional and predictive correlational research was completed with 145 patients. The patient descriptive form, the Brief Illness Perception Questionnaire, and the Self-Care Management Processes-Guarding Scale were used to collect data. Descriptive statistics were used in the data analysis, and SPSS Process Macro Model 4 was utilized to test the mediating role. Results: A positive and moderately significant relationship was identified between COPD stage and illness perception. A negative and moderate relationship was found between COPD stage and self-care management. Furthermore, a negative and highly significant relationship was determined between illness perception and self-care management. It was observed that COPD stage and illness perception were significant predictors of self-care management. Since the indirect effect of COPD stage on self-care management was significant, it was revealed that illness perception mediated COPD stage and self-care management. Conclusion: It is essential to assess COPD stage and illness perception when evaluating self-care management in COPD patients and in patient care
First report of cherry virus A (Capillovirus alphavii) from sweet cherry (Prunus avium) inTurkiye
No full textTác động của đổi mới sáng tạo tới bất bình đẳng thu nhập ở Việt Nam: Phân tích cấp địa phương
No full textThis paper assesses the impact of innovation on income inequality in Vietnam, by specifying and testing econometric models using cross-sectional socio-economic data at the provincial level in 2023. The research results provide quantitative evidence for the role of innovation in reducing income inequality, represented by the Gini coefficient, and offer further evidence on the impact of other factors on income inequality. This is a pioneering study in applying the Provincial Innovation Index (PII) published by the Ministry of Science and Technology since 2023; and provides valuable quantitative information for policymakers in the new Vietnam’s development landscape.
Bài viết đánh giá ảnh hưởng của đổi mới sáng tạo đến bất bình đẳng thu nhập ở Việt Nam, thông qua xây dựng và kiểm định các mô hình kinh tế lượng sử dụng dữ liệu cắt ngang về kinh tế - xã hội năm 2023 ở cấp địa phương. Kết quả nghiên cứu cho thấy bằng chứng định lượng về vai trò của đổi mới sáng tạo trong việc giảm bất bình đẳng thu nhập, được đại diện bởi hệ số Gini; và cung cấp thêm bằng chứng về tác động của các yếu tố khác đến bất bình đẳng thu nhập. Đây là nghiên cứu tiên phong trong ứng dụng bộ chỉ số đổi mới sáng tạo cấp địa phương (PII) được Bộ Khoa học và Công nghệ công bố từ năm 2023; đồng thời cung cấp nhiều thông tin tham khảo định lượng cho các nhà hoạch định chính sách trong bối cảnh phát triển mới ở Việt Nam
Expression patterns of growth differentiation factor 8 protein in ovarian follicles and the corpus luteum of domestic cats
No full textThe Growth Differentiation Factor 8 is a member of the Transforming Growth Factor Beta family and plays a vital role in ovarian dynamics. The present study investigated: i) the expression patterns of Growth Differentiation Factor 8 protein in feline ovarian follicles and corpus luteum, and ii) the effect of reproductive cycle stages on ovarian GDF8 expression in domestic cats. Ovaries were collected from 28 healthy domestic female cats undergoing elective ovariohysterectomy and classified into follicular (n = 15) and luteal (n = 13) phase groups. Growth Differentiation Factor 8 protein expression was assessed via enzyme-linked immunosorbent assay (ELISA) and immunohistochemistry. In primordial follicles, Growth Differentiation Factor 8 immunoreactivity was restricted to the oocyte. In primary and secondary follicles, both oocytes and granulosa cells exhibited Growth Differentiation Factor 8 staining, while thecal cells remained negative. In antral follicles, Growth Differentiation Factor 8 was present in oocytes, granulosa cells, and follicular fluid, but absent in thecal cells. In the corpus luteum, Growth Differentiation Factor 8 immunoreactivity varied by developmental stage. Mild staining was observed in luteal cells during early development and maintenance. Severe immunoreactivity appeared in late developmental and maintenance stages, while moderate staining was present during regression. Non-steroidogenic cells showed no reactivity. No significant differences in ovarian Growth Differentiation Factor 8 expression were found between follicular and luteal phases, nor between maintenance and regression stages of the corpus luteum. Growth Differentiation Factor 8 may significantly regulate folliculogenesis and corpus luteum development in the feline ovary
The Effects of Digital Games on English for Specific Purposes (ESP) Vocabulary Retention
No full textVocabulary is a basic element of learning English for Specific Purposes (ESP). However, mastering ESP vocabulary is more challenging than general English due to its distinctive features, particularly in the military context. Military students usually struggle to acquire the form and meaning of military English vocabulary. Meanwhile, traditional teaching methods make students feel bored and do not have many benefits in learning military English vocabulary. A new, effective, and engaging teaching method is essential to address this problem. Thus, this study conducted a quasi-experimental study with 100 senior students in four intact classes at Nguyen Hue University to investigate the effects of digital games on students’ military English vocabulary retention. All participants were divided into two groups, including a control and an experimental group. The control group was practiced learned military English vocabulary through traditional teaching methods, whereas the experimental group was practiced by playing digital games. The data was collected after the 8-week intervention and analyzed by comparing the pre-test and post-test scores from the two groups, as well as an attitude questionnaire given to students in the experimental group. The findings revealed that digital games have effectiveness on vocabulary long-term retention of students, and they also express their positive attitude toward the use of digital games in learning military English vocabulary. This study also points out several suggestions for not only teachers, students, but also couse managers in teaching and learning military English vocabulary via playing digital games, some limitations, and recommendations for future research
İletişim Çalışmaları Alanında Uluslararası Araştırmalar-VII (International Research in the Field of Communication Studies)
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Reverse mentoring: intergenerational communication and its perceived contributions to organizational life
No full textReverse mentoring, in contrast to traditional mentoring models, enables younger employees to guide senior leaders by sharing technological competencies, contemporary insights, and generational perspectives. This study aims to examine how reverse mentoring is experienced and interpreted by senior executives across various industries, including international companies operating in Türkiye. The study adopts a qualitative methodology based on in-depth interviews with 16 senior executives from diverse organizational settings. Rather than offering an objective assessment of program outcomes, the research focuses on the perceived effectiveness of reverse mentoring from the perspective of senior leaders. Thematic analysis indicates that senior leaders perceive reverse mentoring as more effective when mutual trust, psychological safety, open communication, and reciprocal engagement are present. Participants associated reverse mentoring with enhanced intergenerational communication, stronger organizational belonging, leadership development, digital adaptation, and innovation. Beyond facilitating knowledge exchange on digital tools, executives reported that reverse mentoring fosters broader interactions involving decision-making, strategic thinking, and organizational learning. The findings suggest that reverse mentoring functions not only as a knowledge-transfer mechanism but also as a relational and cultural practice that may support inclusive leadership and organizational adaptability. The study offers practical insights for organizations seeking to integrate reverse mentoring into leadership development and talent management strategies.Reverse mentoring, in contrast to traditional mentoring models, enables younger employees to guide senior leaders by sharing technological competencies, contemporary insights, and generational perspectives. This study aims to examine how reverse mentoring is experienced and interpreted by senior executives across various industries, including international companies operating in Türkiye. The study adopts a qualitative methodology based on in-depth interviews with 16 senior executives from diverse organizational settings. Rather than offering an objective assessment of program outcomes, the research focuses on the perceived effectiveness of reverse mentoring from the perspective of senior leaders. Thematic analysis indicates that senior leaders perceive reverse mentoring as more effective when mutual trust, psychological safety, open communication, and reciprocal engagement are present. Participants associated reverse mentoring with enhanced intergenerational communication, stronger organizational belonging, leadership development, digital adaptation, and innovation. Beyond facilitating knowledge exchange on digital tools, executives reported that reverse mentoring fosters broader interactions involving decision-making, strategic thinking, and organizational learning. The findings suggest that reverse mentoring functions not only as a knowledge-transfer mechanism but also as a relational and cultural practice that may support inclusive leadership and organizational adaptability. The study offers practical insights for organizations seeking to integrate reverse mentoring into leadership development and talent management strategies.</div
Relationship Between Intraocular Pressure and Carbonic Anhydrase Enzyme Activity in Cattle: Implications for Veterinary Ophthalmology
No full textThis study evaluated the relationship between intraocular pressure (IOP) and carbonic anhydrase (CA) activity in healthy pregnant and non-pregnant Brown Swiss cows. Fourteen cows (seven pregnant, seven non-pregnant; average age 4.5 +/- 0.3 years; body weight 500 +/- 50 kg) were included. After clinical and ophthalmologic examinations, IOP was measured in both eyes using a rebound tonometer on 10 consecutive mornings (9-12 AM). Blood samples were collected for the determination of plasma CA activity. Data were analysed with parametric and non-parametric tests, and right-left eye agreement was assessed via Bland-Altman analysis. Pregnant cows showed significantly lower mean IOP (22.19 +/- 1.43 mmHg) than non-pregnant cows (24.50 +/- 1.60 mmHg; p < 0.001), with no significant difference between the eye sides. Plasma CA activity did not differ between groups, but IOP changes correlated positively with CA level changes in pregnant (R-2 = 0.31; p < 0.001) and non-pregnant cows (R-2 = 0.38; p = 0.001). Pregnancy significantly reduces IOP in cattle, and CA activity is associated with IOP changes, suggesting that hormonal and hemodynamic alterations during pregnancy may influence intraocular fluid dynamics. The similarity between eyes facilitates clinical evaluation. The findings may inform further studies on the role of CA in ocular physiology during pregnancy