Consideration Related to the Aharonov-Bohm Effect

Khang,Jeong-woo,Khang,Dong-shik 제주대학교 1987 논문집 Vol.24 No.-

Aharonov-Bohm 효과를 WKB방법을 사용해서 설명하고, 국소장 이론으로 자연을 서술하는 방법의 타당성에 대해 고찰하였다.

Truyện nôm – hiện tượng văn hoá và Thể loại văn học đặc biệt của thời trung đại ở Việt Nam

Đinh Thị Khang 조선대학교 국제문화연구원 2010 국제문화연구 Vol.3 No.1

The unique genre, Nom Literature and its cultural phenomenon during the medieval period in Vietnam. Dinh Thi Khang Truyen Nom was sin-eight metre written in Nom. The existence and value of Truyen Nom is a unique culture phenomenon in the history of Vietnamese culture. During the medieval period (10th–19th C) in Vietnam, the less popularity of Han prose poem led to a decline in the number of Nom prose composed. Truyen Nom was created based on the need for social and cultural reflection and lasted for four centuries. During four century history, Truyen Nom reached its peak in the 18C until the first half of 19C. With a wide dissemination and strong influence, Truyen Nom became the most prominent compositional style and played the important role in the society in terms of spiritual, cultural and civil reflection. Besides written work, Truyen Nom also existed in spoken compositions about daily life which were popularized in public through folk song, lullaby, tales and folk quizzes. The collection of Truyen Nom now includes about 100 pieces of work and processes a number of great compositions such as Hoa Tien, Phan Tran, Quan Am Thi Kinh, Hoang Truu, Pham Tai Ngoc Hoa and Doan Truong Tan Thanh(also known as Truyen Kieu). Truyen Nom was actually divided into two main different types: academic compositions and conventional work. The diversity of Truyen Nom in terms of contents, characters and literary speech made up great literacy and cultural values. The main content of Truyen Nom related to human values and destiny; some were about the aspiration for the freedom of love beyond feudal morality. Others were written about people’s life and personality who fought against oppressive influence to save the family’s happiness and to maintain social justice. The traditional medieval attitude of art brought into Truyen Nom a range of Orientation’s theoretical value in character creation and problem resolution.

쯔놈과 놈 문학-중대 베트남 문화의 찬란한 성과

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.

Exploring Determinants of Secular Decreases in Childhood Blood Pressure and Hypertension

Khang, Y.-H.,Lynch, J.W. AMERICAN HEART ASSOCIATION INC 2011 CIRCULATION - Vol.124 No.4

The Impact of Investments on Economic Growth: Evidence from Vietnam

Khang The NGUYEN,Hung Thanh NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.8

The impact of investment on economic growth has been studied by many authors around the world with different times and research methods. Therefore, there are conflicting opinions about the impact of investment on economic growth. To contribute empirical evidence, the objective of this study is to assess the impact of investment sources such as public investment, private investment, and foreign direct investment on economic growth in Vietnam in the short-run and long-run. The data used for the study is panel data from 63 Vietnamese provinces between 2000 and 2020. The inquiry method is PMG (Pool Mean Group) regression for economic growth (GDP) after testing the stationarity of the variables that meet the PMG regression condition as suggested by Pesaran et al. (1996) and Hamuda et al. (2013). The results show that: factors such as labor and trade openness have a negative impact on economic growth in the short term. In the long run, public investment has a negative effect on economic growth, while domestic private investment, foreign direct investment, trade openness, and labor have positive effects on economic growth. Labour contributes the most, followed by trade openness, foreign direct investment, and domestic private investment. Finally, the study provides policy implications for the Government of Vietnam.

Burden of Noncommunicable Diseases and National Strategies to Control Them in Korea

Khang, Young-Ho The Korean Society for Preventive Medicine 2013 Journal of Preventive Medicine and Public Health Vol.46 No.4

Noncommunicable diseases (NCDs) are the most important causes of premature mortality and disability-adjusted life years in Korea. NCDs are also the main contributor to socioeconomic inequalities in mortality and life expectancy. Reduction of NCDs and NCD inequalities would result in significant improvement in healthy life expectancy and health equity in Korea. Major NCD risk factors such as dietary risks (including salt intake), alcohol consumption, cigarette smoking, and high blood pressure were found to be the leading modifiable risk factors of disability-adjusted life years in Korea, based on the 2010 Global Burden of Disease Study. Several Korean studies have shown that these risk factors play an important role in creating socioeconomic inequalities in NCD mortality and total mortality. Current international discussions on NCD policies in the United Nations and the World Health Organization would provide better opportunities for developing aggressive population-wide policy measures in Korea. Considering the paucity of population-wide policies to control major NCD risk factors in Korea, rigorous population approaches such as taxation and regulation of unhealthy commodities as well as public education and mass campaigns should be further developed in Korea.

Neurogenesis of bone marrow-derived mesenchymal stem cells onto β-mercaptoethanol-loaded PLGA film.

Khang, Gilson,Kim, Hye Lin,Hong, Minsung,Lee, Dongwon Springer 2012 Cell and tissue research Vol.347 No.3

<P>Bone marrow-derived mesenchymal stem cells (BMSCs) are of particular interest in the field of tissue engineering because of their potential to differentiate into osteoblasts, chondrocytes, and neuronal cells. In order to promote the differentiation of BMSCs into specific cell types, appropriate scaffold biomaterials and bioactive molecules that can support the differentiation of BMSCs into specific cell types are needed. We hypothesized that β-mercaptoethanol (BME), which has been reported to induce the differentiation of BMSCs into neural-like cells, promotes BMSCs to differentiate into neural-like cells when BME is added to polymeric scaffolds containing the BMSCs. We fabricated biocompatible film shaped scaffolds composed of poly(lacti-co-glycolic) acid (PLGA) and various concentrations of BME to confirm that BME-promoted differentiation of BMSCs is concentration-dependent. Cell proliferation increased as the BME concentration in the films increased at the early stage, and the proliferation rate remained similar on the PLGA films for 3?weeks following the BMSC seeding. The expression of neuronal markers in differentiated BMSCs was assessed by RT-PCR. At 2- and 3-week time-points, mRNA expression of neurofilament and neuron specific enolase was significantly increased in PLGA/BME films containing 400?μM BME compared to PLGA films. Thus, we have identified BMSC-seeded PLGA/BME films with 200?μM and 400?μM BME as potentially useful candidates for neural tissue engineering applications by promoting BMSC proliferation and differentiation towards neural-like cells.</P>

Exploring influential social cognitive determinants of social media use

Khang, H.,Han, E.K.,Ki, E.J. Pergamon 2014 Computers in Human Behavior Vol.36 No.-

This study explored relationships between social cognitive determinants and examined their associations with social media usage. Overall, the model exhibits a goodness-of-fit and secures generalizability. In examining the social cognitive determinants of social media usage, habit strength was found, with statistical significance, to be the sole and immediate antecedent of social media use. Discussion and implications are further offered.

Expression of epithin in mouse preimplantation development: Its functional role in compaction

Khang, Inkoo,Sonn, Seongkeun,Park, June-Hee,Rhee, Kunsoo,Park, Dongeun,Kim, Kyungjin Elsevier 2005 Developmental biology Vol.281 No.1

<P><B>Abstract</B></P><P>The preimplantation development of mammalian embryo after fertilization encompasses a series of events including cleavage, compaction, and differentiation into blastocyst. These events are likely to be associated with substantial changes in embryonic gene expression. In the present study, we explored the expression patterns and function of epithin, a mouse type II transmembrane serine protease, during preimplantation embryo development. RT-PCR analysis showed that epithin mRNAs were detectable during the cleavage stages from a 1-cell zygote to the blastocyst. Immunocytochemical studies revealed that epithin protein was expressed at blastomere contacts of the compacted 8-cell and later embryonic stages. Epithin colocalized with E-cadherin at the membrane contacts of the compacted morula-stage embryo as revealed by double-staining immunocytochemistry and confocal microscopy, respectively. Post-transcriptional epithin gene silencing by RNA interference (RNAi) resulted in the blockade of 8-cell in vitro-stage embryo compaction and subsequent embryonic deaths after several rounds of cell division. These results strongly suggest that epithin plays an important role in the compaction processes that elicit the signal for the differentiation into trophectoderm and inner cell mass.</P>

Microwave Power Transfer With Optimal Number of Rectenna Arrays for Midrange Applications

Khang, Seung-Tae,Lee, Dong-Jin,Hwang, In-Jun,Yeo, Tae-Dong,Yu, Jong-Won IEEE 2018 IEEE antennas and wireless propagation letters Vol.17 No.-

<P>In this letter, the microwave power transfer (MPT) system with the optimal number of rectenna arrays for midrange applications is proposed, theoretically analyzed, and verified. A retrodirective power transmitter is designed to overcome the degradation by the near-field effect and enhance the power transfer efficiency. The implemented transmitter is composed of 16 <TEX>$\times$</TEX> 1 patch antennas with a <TEX>$\lambda /2$</TEX> spacing, and each of the antennas has a circuit for simultaneously detecting and shifting the phase, and operates at a frequency of 2.45 GHz. To further improve the power transfer efficiency, the parallel dc combining rectenna array is designed since the conventional RF combining rectenna has several problems in the case of midrange. The fabricated rectenna array consists of 8 <TEX>$\times$</TEX> 1 rectennas with a <TEX>$\lambda /2$</TEX> spacing and a dc power management circuit. In addition, the optimal number of rectenna arrays is proposed, considering the size of the receiver. In the experiments, the optimal number of rectennas is 3 when the transfer distance is 1 m. The achieved power transfer efficiency from three-arrayed rectennas is 4.47%, while the efficiency of 5.01% is achieved from eight-arrayed rectennas. Experimental results from the implemented MPT system show good agreement with the proposed theory.</P>