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Dinh Thi Khang 조선대학교 국제문화연구원 2009 국제문화연구 Vol.2 No.1
After obtaining the nation’s independence, Vietnam feudal dynasties continued to use Han as the official script. However, to satisfy people’s daily need, Nom was created and became an outstanding accomplishment in Vietnamese literature, which expressed the national esteem, power as well as position of Vietnamese language. Nom script was steadily improved, and Vietnamese people started to use Nom in literature work from XIII century. This was a significant improvement in national esteem and as well as a remarkable development in literature. History of Nom literature spread in seven centuries and was divided into four periods: Period 1 (the X century - the XIV century): Come along with Han, Nom script started to appear in literature since Tran’s dynasties. This is the vital achievement in the period which set up the basis for the development of composing in national language in the following centuries. Period 2 (the XV century -the XVII century): Besides accomplishments in Han compositions, Nom literature with diverse styles was well developed and attained worthy achievements, which set a firm fundamental for the development later on. The success of Tho Nom Duong luat was marked with the existence of massive collections (including hundreds of poems). This time was the outstanding period in the literature history. Period 3 (the XVIII century - the beginning of XIX century): This time was considered as the golden age in the history with a notable development in Nom literature. With traditional literary styles, compositions written in Nom created masterpieces in literary heritages. Period 4 (from the late XIX century): In transformation process of national literature from medieval to modern, Nom compositions continuously played an importance role in create the unique features in this stage. The appearance and development of Nom literature is a must in the Vietnamese literature history in the process of building up our literature, In this process, the compositions written by several famous authors, for example Nguyen Trai, Nguyen Binh Khiem, Doan Thi Diem, Nguyen Gia Thieu, Ho Xuan Huong, Nguyen Du, Nguyen Dinh Chieu, Nguyen Khuyen, Tu Xuong, and etc., have created a series of valued masterpiece; among those, ‘Doan truong tan thanh’ (Truyen Kieu) written by Nguyen Du is consider the number one masterpiece. Hence, Nom literature achievement has claimed an important role of Vietnamese language in literature compositions. The appearance of Nom script and Nom literature are astounding successes of Vietnamese literature in medieval period. With Nom written language, so many traditional literary styles were created and added worthy values into Vietnamese literature. The first achievement was to vietnamize Duong luat style to make up Tho Nom Duong luat - a style of poetry of which all the features of Vietnamese poetry were taken into account. The second success was creating two kinds of whtten compositions named Truyen Nom and Khuc ngam song that luc bat on the basis of folk poetry (six-eight meter and double seven six-eight meter style) In Nom compositions, public language used to be considered informal speech was brought into written work. The process of setting up Nom literature was the development of language selection and usage as well as the improvement in expression abilities and art level of national language. Nom compositions insisted the values, fates, right of existence and aspirations of human, especially those of women. Those were the general topics in our literature which followed humanism. As a result, democracy in content which required nationalized manners of expression in terms of written language, style of poetry and speech became the norm in Vietnamese literature. Vietnam has officially been a member of IRG since 2000. Written Nom has been encoded to add into international symbol system with similar script in the area. As a result, Nom written language created by Vietnamese people has been internationally recognized as a unique contribution to the cultural treasure of humanity.
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A regional approach for health risk assessment of toxicants in plastic food containers
Nguyen Lan Binh Thi,Thanh Truc Nguyen Thi,Nguyen Ngoc Tran Thi,Vu Dinh Khang,Lee Byeong-Kyu 한국독성학회 2023 Toxicological Research Vol.39 No.4
Plastic food containers are being used popularly, generating a waste of about 115 million tons in Vietnam. Such waste is causing environmental and health issues. This study conducted a field survey with 250 local people and selected 59 samples out of 135 plastic food containers collected in Go Vap district, Vietnam. Collected plastic samples identified compositions were PET 13.6%, PP 28.8%, PS 16.9%, and 40.7% undefined plastics. Collected plastic samples were classified based on the plastic type using recycling code and quantitatively analyzed with X-ray fluorescence spectroscopy method to assess concentrations of Cd, Sb, Pb, Hg, Sn, Cr, Br, Cl, and S. Most of these collected plastic samples (91.5%) were found to contain 8/9 hazardous substances and most elements contained in these plastics were below their standard thresholds. These elements in plastic samples could be divided as the result into three hazard groups: (1) high hazard group (Sb, Cl, and S); (2) medium hazard group (Cr, Br and Hg); and (3) low hazard groups (Cd, Pb and Sn). Among substances in the high hazard group, element Sb was assessed for its migration because only Sb is regulated in Vietnam in QCVN 12-1: 2011/BYT. Substances of Cl, S, Cr, Br, and Hg (group 1, 2) do not have regulations related to the method of decontamination. Thus, additional health risks need to be assessed using the USEtox model. Finally, this study proposed a screening process to assess the risk of toxicity of elements contained in plastic food containers through ISO 31000:2018.
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Optimal control of vibration by multiple tuned liquid dampers using Taguchi method
Nguyen Van Khang,Do The Duong,Nguyen Thi Van Huong,Nguyen Duc Thi Thu Dinh,Vu Duc Phuc 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.4
This paper investigates the multiple tuned liquid dampers (MTLD), which consist of a number of MTLD whose first natural frequencies of sloshing are distributed over a certain range around the natural frequency of a structure. The liquid motion in the MTLD as well as the MTLD-structure interaction are numerically simulated using a shallow water-wave theory. An optimal procedure based on Taguchi method is proposed to determine the optimum parameters of MTLD to suppress the vibration amplitude of the considered structure. A number of numerical tests are included to demonstrate and verify the effectiveness of the proposed procedure.
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