Optimizing Phase Change Materials for Volatility Management in Solar-Driven CO2 Methane Dry Reforming

Solar-driven CO2 methane dry reforming (CRM) is a promising technology for integrating solar energy utilization with greenhouse gas reduction. However, the transient nature of solar radiation leads to significant temperature fluctuations, which can adversely affect reactor performance, catalyst stability, and overall system efficiency. This study proposes a passive thermal management approach by integrating phase change materials (PCMs) with structural optimization to mitigate the effects of solar radiation variability. A comprehensive numerical model was developed to simulate the solar-driven CRM process in a porous foam reactor, incorporating solar radiation transport, heat transfer, and thermochemical kinetics. Experimental validation was conducted using a simulated solar concentration system. The results demonstrate that the integration of PCMs reduces temperature fluctuations by 63% and improves the methane conversion rate by 0.4%, ensuring stable reactor performance under fluctuating solar radiation. Furthermore, the use of composite PCMs with enhanced thermal conductivity significantly improves thermal buffering capacity and reaction stability. This study highlights the potential of PCM-based thermal management in advancing solar- driven thermochemical processes, offering a robust solution for improving energy efficiency and system stability in renewable energy applications

Small Bowel Adenocarcinoma Presenting with Refractory Iron Deficiency Anemia – Case Report and Review of Literature

Cancers of the small bowel are relatively rare and account for approximately 1–2% of all gastrointestinal neoplasms. The most common histologic subtype – adenocarcinoma – constitutes 40% of all cases. These cancers generally present with vague abdominal discomfort and are often diagnosed at a late stage and carry a poor prognosis. The treatment of choice of early-stage small bowel adenocarcinoma is surgical resection. No standard treatment protocol has been defined for unresectable or metastatic disease. Here, we report a case of a 56-year-old woman who presented with unexplained iron deficiency anemia. Extensive initial studies with serial CT scans of the abdomen, esophagogastroduodenoscopy, small bowel capsule endoscopy and colonoscopy were noncontributory. She was later found to have a metastatic small bowel adenocarcinoma and treated with palliative chemotherapy. She achieved a modest response to the treatment. Interestingly, in our case, the sole presentation was unexplained iron deficiency anemia. Physician's awareness regarding the possibility of small bowel cancer especially in the setting of iron deficiency and its workup has been emphasized. This enhances the chance of early detection and hence better survival

The impact of the entrepreneurial environment on Vietnamese tourism students' entrepreneurial intention

Purpose: Based on Social and Contextual cognitive theory, this study examines the impact of the entrepreneurial environment on the entrepreneurial intentions of students majoring in tourism in Vietnam. Design/methodology/approach: To standardize the conceptual framework of the study, the author began to use the qualitative research method to build hypotheses, then used the quantitative research method to conduct evaluation and assessment, and calculated the sample of the study with the SPSS software version 25. The study was conducted in the form of online survey research on the sample of 275 undergraduate students of tourism and hospitality management in 7 universities in Vietnam. Findings: The findings show that all six hypotheses of the study are accepted, and they have a positive impact on Vietnamese tourism students' entrepreneurial intention. Among them, the political environment is the most influential. Research limitations/implications: Despite efforts to standardize the conceptual framework, the complexity of the entrepreneurial environment may have led to incomplete consideration of relevant variables. The study primarily examined the impact of the entrepreneurial environment on intentions, not behaviors or outcomes, leaving room for future research to conduct a more comprehensive examination of the entrepreneurial process. These limitations offer opportunities for future research to enhance understanding of the intricate relationship between the entrepreneurial environment and intentions among tourism students in Vietnam. Originality/value: The research contributes to the understanding of entrepreneurial intentions among Vietnamese tourism students and provides practical insights for educators, policymakers, and industry stakeholders. Its focus on the entrepreneurial environment and application of relevant theoretical frameworks position it as a meaningful contribution to the fields of entrepreneurship and tourism education

Cultural contrasts between Chinese and Western flood legends from an intercultural perspective

Flood is a natural disaster that threatens the safety of people's lives and property, and there are myths and legends related to flood disasters in China and abroad. The Noah's Ark is one of the most famous stories in the Bible in the West, and the story of Yu the Great Harnesses the Flood is a well-known story in China. By comparing the story of Noah's Ark and Yu the Great Harnesses the Flood, this paper explores the deep cultural differences between China and the West, so as to understand and tolerate each other in intercultural communication and reduce unnecessary cultural conflicts

Por los senderos de la sombra [microform] /

Master Negative No. 91-0536.Microfilm.Mode of access: Internet