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RISS 인기검색어
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- 저자 : Anh V. Truong (검색결과 5 건)
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Numerical investigations of solidification around a circular cylinder under forced convection
Truong V. Vu,Anh V. Truong,Ngoc T. B. Hoang,Duong K. Tran 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.11
We present numerical investigations of solidification around a cooled circular cylinder in the presence of forced convection. The numerical method is based on the front-tracking/finite difference and interpolation techniques. The solidification interface is represented by connected elements that move on a fixed, rectangular grid. The no-slip and Dirichlet temperature boundary conditions are imposed by the linear interpolation. The interpolation method was first validated through comparisons of the present results with some other numerical results for flow in an annulus, flow in an enclose with a conduction solid body and flow over a heated cylinder. We then used the method to investigate the solidification process around a cold cylinder by varying various parameters such as the Reynolds number Re, the Prandtl number Pr, the Stefan number, the thermal conductivity ratio k sl , the non-dimensional temperature of the introduced liquid q 0 , and the solid-to-liquid density ratio r sl . Numerical results indicate that an increase in any of Re, Pr and q 0 results in a decrease in the area of the solidification region around the cylinder. In contrast, increasing k sl increases the region of the solid phase. Investigation on St and r slreveals that the solidification rate increases with an increase in St or a decrease in r sl . However, St and r sl have a minor effect on the final product of the solidification process.
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V Vien Lee,Ni Yin Lau,David J Y Xi,Anh T L Truong,Agata Blasiak,Kewin T H Siah,Dean Ho 대한소화기 기능성질환·운동학회 2022 Journal of Neurogastroenterology and Motility (JNM Vol.28 No.3
Background/AimsConstipation can be a chronic condition that impacts daily functioning and quality of life (QoL). To aid healthcare providers in accurately assessing patient symptoms and treatment outcomes, patient-related outcome measures (PROMs) have been increasingly adopted in clinical settings. This review aims to (1) evaluate the methodological quality and measurement properties of constipation-related PROMs, using the COnsensus-based Standards for the selection of health Measurement INtruments (COSMIN) criteria; and (2) assess the modes of digital dissemination of constipation-related PROMs. MethodsPubMed, Embase, and PsycINFO databases were searched and 11 011 records ranging from 1989 to 2020 were screened by 2 independent reviewers. A total of 26 studies (23 PROMs; 18 measuring symptom-related items and 5 measuring constipation-related QoL items) were identified for the review and assessed. ResultsThere were multiple variations between PROMs, including subtypes of constipation, methods of administration, length of PROM and recall period. While no PROM met all the COSMIN quality standards for development and measurement properties, 5 constipation-related PROMs received at least 4 (out of 7) sufficient ratings. Only 2 PROMs were developed in Asia. Five PROMs were administered through digital methods during the validation process but methods of adapting the PROMs into digital formats were not reported. ConclusionsThe constipation-related PROMs identified in this review present varying quality of development and validation, with an overall need for improvement. Further considerations should be given towards more consistent methodology and reporting of PROM development, increase in culturally-specific PROMs, and better reporting of protocol for the digitisation of PROMs.
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A Metadata-enabled Approach for Scalable Video Streaming in Heterogeneous Networks
Thang, Truong Cong,Le, Hung T.,Nguyen, Duc V.,Pham, Anh T. Korea Multimedia Society 2015 The journal of multimedia information system Vol.2 No.1
In today's pervasive computing environments, multimedia content should be adapted to meet various conditions of network connections, terminals, and user characteristics. Scalable Video Coding (SVC) is a key solution for video communication over heterogeneous networks, where user terminals have different capabilities. This paper presents a standard-compliant approach that adapts an SVC bitstream to support multiple users. The adaptation problem is formulated as an optimization problem, focusing on the tradeoff between qualities of different spatial layers of an SVC video. Then the adaptation process is represented by standard metadata of MPEG-21, which can be solved by universal processing to enable interoperable and automatic operation. Our approach provides the users with optimal quality, a wide flexibility, and seamless adaptation. To the best of our knowledge, this is the first study that shows the adaptation tradeoff between spatial layers of a conforming SVC bitstream.
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Ba-Anh-Tu Truong,Vi V. Tran Korean Academic Society For Public Relations 2023 Asian Journal of Public Relations Vol.6 No.1
Corporate Social Responsibility (CSR) has consistently received the attention of scholars and practitioners in various academic disciplines, including economics, politics, society, and public relations. In this context, the nature of CSR in developing countries becomes an emerging question because of the business expansion of multinational corporations (MNCs) in these countries. Vietnam is a country with a unique political, economic, and sociocultural context, experiencing rapid economic growth despite the COVID-19 pandemic. Therefore, this paper explores the CSR approaches, government cooperation, and CSR activities of “big-six” enterprises from different industries between 2018 to 2022 using a content analysis to capture and analyze the CSR initiatives. Our research is the first to highlight some theoretical frameworks in the Vietnamese context that contribute to developing global CSR debates.
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( Ba-anh-tu Truong ),( Vi V. Tran ) 한국PR학회 2023 AJPR Vol.6 No.1
Corporate Social Responsibility (CSR) has consistently received the attention of scholars and practitioners in various academic disciplines, including economics, politics, society, and public relations. In this context, the nature of CSR in developing countries becomes an emerging question because of the business expansion of multinational corporations (MNCs) in these countries. Vietnam is a country with a unique political, economic, and sociocultural context, experiencing rapid economic growth despite the COVID-19 pandemic. Therefore, this paper explores the CSR approaches, government cooperation, and CSR activities of “big-six” enterprises from different industries between 2018 to 2022 using a content analysis to capture and analyze the CSR initiatives. Our research is the first to highlight some theoretical frameworks in the Vietnamese context that contribute to developing global CSR debates.
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