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.

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.

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.

Engineering EGF Growth Factor/Receptor Binding and Trafficking Processes

Khang, Yong-Ho 한국산업미생물학회 1992 생물산업 Vol.5 No.2

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>

Preparation and Characterization of Small Intestine Submucosa Powder Impregnated Poly(L-lactide) Scaffolds: The Application for Tissue Engineered Bone and Cartilage

Khang, Gilson,Rhee, John M.,Shin, Philkyung,Kim, In Young,Lee, Bong,Lee, Sang Jin,Lee, Young Moo,Lee, Hai Bang,Lee, Ilwoo The Polymer Society of Korea 2002 Macromolecular Research Vol.10 No.3

In order to endow with new bioactive functionality from small intestine submucosa (SIS) powder as natural source to poly (L-lactide) (PLA) and poly (lactide-co-glycolide) (PLGA) synthetic biodegradable polymer, porous SIS/PLA and SIS/PLGA as natural/synthetic composite scaffolds were prepared by means of the solvent casting/salt leaching methods for the possibility of the application of tissue engineered bone and cartilage. A uniform distribution of good interconnected pores from the surface to core region was observed the pore size of 40~500 ${\mu}{\textrm}{m}$ independent with SIS amount using the solvent casting/salt leaching method. Porosities, specific pore areas as well as pore size distribution also were almost same. After the fabrication of SIS/PLA hybrid scaffolds, the wetting properties was greatly enhanced resulting in more uniform cell seeding and distribution. Five groups as PGA non-woven mesh without glutaraldehyde (GA) treatment, PLA scaffold without or with GA treatment, and SIS/PLA (Code No.3 ; 1 : 12 of salt content, (0.4 : 1 of SIS content, and 144 ${\mu}{\textrm}{m}$ of median pore size) without or with GA treatment were implanted into the back of nude mouse to observe the effect of SIS on the induction of cells proliferation by hematoxylin and eosin, and von Kossa staining for 8 weeks. It was observed that the effect of SIS/PLA scaffolds with GA treatment on bone induction are stronger than PLA scaffolds, that is to say, in the order of PLA/SIS scaffolds with GA treatment > PLA/SIS scaffolds without GA treatment > PGA nonwoven > PLA scaffolds only with GA treatment = PLA scaffolds only without GA treatment for the osteoinduction activity. The possible explanations are (1) many kinds of secreted, circulating, and extracellular matrix-bound growth factors from SIS to significantly affect critical processes of tissue development and differentiation, (2) the exposure of SIS to GA resulted in significantly calcification, and (3) peri-implant fibrosis due to covalent bonding between collagen molecule by crosslinking reaction. In conclusion, it seems that SIS plays an important role for bone induction in SIS/PLA scaffolds for the application of tissue engineering area.

Biological evaluation of intervertebral disc cells in different formulations of gellan gum-based hydrogels

Khang, G.,Lee, S.K.,Kim, H.N.,Silva-Correia, J.,Gomes, M.E.,Viegas, C.A.A.,Dias, I.R.,Oliveira, J.M.,Reis, R.L. WILEY 2015 JOURNAL OF TISSUE ENGINEERING AND REGENERATIVE MED Vol.9 No.3

DIFFERENTIAL SAVING RATES , TAX BURDENS , AND WELFARE

KHANG, CHULSOON 한국국제경제학회 1996 International Economic Journal Vol.10 No.2

Effects of Cassava Leaf Meal on the Rumen Environment of Local Yellow Cattle Fed Urea-Treated Paddy Straw

Khang, D.N.,Wiktorsson, H. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.8

An experiment was conducted as a Latin square design with four rumen fistulated local yellow cattle with a mean live weight of 230 kg. The treatments were: $(CLM_0)$ urea-treated rice straw ad libitum plus 1 kg cassava root meal (basal diet), $(CLM_{500})$ basal diet plus 500 g cassava leaf meal, $(CLM_{1000})$ basal diet plus 1,000 g cassava leaf meal, and $(CLM_{1500})$ basal diet plus 1,500 g cassava leaf meal. The results showed that there were differences in dry matter intake of urea-treated rice straw between treatments (p<0.05). The highest total dry matter intake was observed for treatment $CLM_{1500}$, with 2.62 kg DM/100 kg LWt/day, followed by treatments $CLM_{1000}$, $CLM_{500}$ and $CLM_0$, with 2.42, 2.00 and 1.86 kg DM/100 kg LWt/day, respectively. The ruminal ammonia concentration on treatment $CLM_{1500}$ was greater than on treatments $CLM_{1000}$, $CLM_{500}$ and $CLM_0$. There were non-significant differences in the ruminal pH among the treatments. The in sacco degradability of cassava leaf meal and cassava root meal was high, and on average 75 and 85% respectively of the DM had disappeared after 24 h of incubation. Degradation rate of urea treated rice straw was 64% after 72 h of incubation.

LINDELÖFICATION OF FRAMES

Khang, Mee Kyung The Kangwon-Kyungki Mathematical Society 2007 한국수학논문집 Vol.15 No.2

We introduce a concept of countably strong inclusions ${\triangleleft}$ and that of ${\triangleleft}-{\sigma}$-ideals and prove that the subframe $S({\triangleleft})$ of the frame ${\sigma}IdL$ of ${\sigma}$-ideals is a Lindel$\ddot{o}$fication of a frame L. We also deal with conditions for which the converse holds. We show that any countably approximating regular $D({\aleph}_1)$ frame has the smallest countably strong inclusion and any frame which has the smallest $D({\aleph}_1)$ Lindel$\ddot{o}$fication is countably approximating regular $D({\aleph}_1)$.