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Gargi Roy,Raj Narayan Hajra,Woo Hyeok Kim,Jongwon Lee,Sangwoo Kim,Jeoung Han Kim 한국분말재료학회(구 한국분말야금학회) 2024 한국분말재료학회지 (KPMI) Vol.31 No.1
This study explores the profound impact of varying oxygen content on microstructural and mechanical properties in specimens HO and LO. The higher oxygen concentration in specimen HO is found to significantly influence alpha lath sizes, resulting in a size of 0.5-1 μm, contrasting with the 1-1.5 μm size observed in specimen LO. Pore fraction, governed by oxygen concentration, is high in specimen HO, registering a value of 0.11%, whereas specimen LO exhibits a lower pore fraction (0.02%). Varied pore types in each specimen further underscore the role of oxygen concentration in shaping microstructural morphology. Despite these microstructural variations, the average hardness remains consistent at ~370 HV. This study emphasizes the pivotal role of oxygen content in influencing microstructural features, contributing to a comprehensive understanding of the intricate interplay between elemental composition and material properties.
( Walter Enders ),( Raj Roy ) 세종대학교 경제통합연구소 1991 Journal of Economic Integration Vol.6 No.2
Using a two-country overlapping generations model, we analyze some of the tensions between developed and developing nations regarding international capital movements. The nature of the model is such that optimizing agents in the South have a high rate of time preference. Otherwise, the North and the South are alike in all resepects. The differential rate of time preference means that the South is likely to have a relatively low capital/labor ratio, wage rate, and level of per capita income but a relatively high interest rate in autarkic equilibrium. The introduction of international capital flows (intertemporal trade) will be welfare reducing for the current generation in the South even though it may increase the next generation`s (and steady state) utility. We discuss the international conflicts which arise with international capital movements and the intergenerational conflicts which arise within each nation.
Intertemporal Trade between Developed and Developing Nations : A Model of Host-Donor Tensions
Enders, Walter,Roy, Raj 세종대학교 국제경제연구소 1991 Journal of Economic Integration Vol.6 No.2
Using a two-country overlapping generations model, we analyze some of the tensions between developed and developing nations regarding international capital movements. The nature of the model is such that optimizing agents in the South have a high rate of time preference. Otherwise, the North and the South are alike in all resepects. The differential rate of time preference means that the South is likely to have a relatively low capital/labor ration, wage rate, and level of per capita income but a relatively high interest rate in autarkic equilibrium. The introduction of international capital flows (intertemporal trade) will be welfare reducing for the current generation in the South even though it may increase the next generation's (and steady state) utility. We discuss the international conflicts which arise with international capital movements and the intergenerational conflicts which arise within each nation.
Subhankar Manna,Raj Kumar,Santosh K. Satpati,Saswati B. Roy,Jyeshtharaj B. Joshi 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.3
Uranium metal used for fabrication of fuel for research reactors in India is generally produced by magnesio-thermic reduction of UF4. Performance of magnesio-thermic reaction and recovery and quality of uranium largely depends on properties of UF4. As ammonium diuranate (ADU) is first product in powder form in the process flow-sheet, properties of UF4 depend on properties of ADU. ADU is generally produced from uranyl nitrate solution (UNS) for natural uranium metal production and from uranyl fluoride solution (UFS) for low enriched uranium metal production. In present paper, ADU has been produced via both the routes. Variation of uranium recovery and crystal structure and composition of ADU with progress in precipitation reaction has been studied with special attention on first appearance of the precipitate Further, ADU produced by two routes have been calcined to UO3, then reduced to UO2 and hydroflorinated to UF4. Effect of two different process routes of ADU precipitation on the characteristics of ADU, UO3, UO2 and UF4 were studied here.
Sreshtha Chowdhury,Rifat Ara,Simanta Roy,Syed Md. Sayeem Tanvir,Fahima Nasrin Eva,Tasnova Mehrin Neela,Amena Akter Moonmoon,Shamma Sifat,Bhesh Raj Sharma,Mohammad Delwer Hossain Hawlader 대한백신학회 2022 Clinical and Experimental Vaccine Research Vol.11 No.1
Purpose: Sexually transmitted infections are a major worldwide concern, and human papillomavirus (HPV) is one of the significant risk factors. Many populations suffer from various diseases caused by HPV, and the overall death toll due to cervical carcinoma is remarkable. Despite vaccine availability, perception about vaccine safety and efficacy, its’ preventive outcome is still inferior among the health professionals and vaccine providers. So, this study aims to assess the knowledge, attitude, and practice level of HPV and its’ vaccination among doctors, dentists, and medical students. Materials and Methods: This cross-sectional survey was carried out between April to August 2021, where 626 participants from all types of medical institutions of Bangladesh were interviewed using a validated and structured questionnaire that consists of four extensive areas; socio-demographic characteristics, HPV knowledge, attitude, and practices regarding vaccination. Results: The knowledge and practice standards showed very poor outcomes where 43.29% of the participants showed good knowledge and only 11.82% conveyed good practices. Nevertheless, the attitude towards HPV vaccination was revealed high (75.88%). Female participants showed more positive attitudes than males. Conclusion: Physicians and dentists play vital roles in raising public knowledge about HPV and awareness regarding HPV vaccination programs. The provision of medical education on HPV must be prioritized, and current training techniques must be re-evaluated. Thus, by implementing this strategy, improvement in national vaccination policy can be exp