남한에서 복사 가열율의 계절별 특성

이규태,조희구 연세대학교 자연과학연구소 1994 學術論文集 Vol.27 No.-

대기의 복사 가열율을 계산하기 위하여 MRI(Meteorological Research Institute), GLA(Goddard Laboratory for Atmosphere) 그리고 MDC(Ming-Dah Chou)의 세 모수화 모형을 기준모형과 비교하여 최적 복사모형을 구하였다. 최적 모수화 모형으로 MDC모형을 택하였으며 이 모형에 의하여 오산(37˚ 06' N, 127˚ 02' E), 포항(36˚ 02' N, 129˚ 23' E), 광주(35˚ 07' N, 126˚ 49' E)의 세 지점에서의 고층 관측 자료를 이용하여 계절별, 고도별, 지역별 태양 복사의 가열율과 적외 복사의 냉각율을 각각 계산하여 그 변화의 특징을 밝혔다. 대류권에서 계절, 고도 그리고 지역에 따라 태양 복사의 가열율이 0.50 Kday^-1∼1.5 Kday^-1의 범위로 나타났고 적외 복사의 냉각율은 1 Kday^-1∼2 Kday^-1로서 가열율이 냉각율보다 적게 나타났다. 그러나 상부 성층권에서는 반대로 태양 복사 가열율의 변화 범위가 10 Kday^-1∼20 Kday^-1로 대기 냉각율의 변화 범위, 9 Kday^-1∼10 Kday^-1보다 크게 나타났다. 이들 변화의 특징은 태양 복사량, 수증기량 그리고 기온에 의존하고 있음을 알 수 있다. Three radiative transfer models-MRI, GLA and MDC-have been compared with the exact model to obtain the most optimum model for the calculation of atmospheric heating rates. As a result of this comparison the MDC model was chosen as the most optimum model. Based on the aerological observation data at Osan (37˚06' N, 127˚02' E), Pohang (36˚02' N, 129˚23' E) and Kwangju (35˚ 07' N, 126˚ 49' E) with the use of this MDC model the characteristics of seasonal, altitudinal, and regional changes of solar heating and terrestrial cooling rates have been investigated with the use of this MDC model. In the troposphere, these changes of solar heating rated are in the range pf 0.5 to 1.7 Kday^-1, while these terrestrial cooling rates are in the range of 1 to 2 Kday^-1. Thus, the solar heating is less than the terrestrial cooling rates are in ghe range of 1 to 2 Kday^-1. Thus, the solar heating is less than the terrestrial cooling in the troposhere. In the upper stratosphere, however the range of solar heating rates, 10 to 20 Kday^-1, are larger than the terrestrial cooling rates, 9 to 10 Kday^-1. It has been also found that seasonal, altitudinal and regional changes of radiative heating and cooling rates depend on mainly the intensity of solar radiation, water vapors amount and air temperature.

Laser Interferometer를 이용한 초정밀위치결정 피드백시스템의 컴퓨터 시뮬레이션 및 제어성능 평가

김재열,이규태,곽이구,한재호,김창현 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1

This system is composed of fine and coarse apparatus, measurement system and system. Piezoelectric actuator is designed for find positioning. We make a study of precision apparatus that is used in the various industrial machine. The study was carried out to develope a precision positioning apparatus, consisting of servo motor and piezoelectric actuator Coarse positioning using lead screw is drived by servo motor. Control system output a signal from laser interferometer to amplifier of servo motor and piezoelectric actuator after digital signal processing(DSP). Resolution of this apparatus measure with laser interferometer. In this study, design method and control system with ultra precision position apparatus are researched. As the fist step, we have estimated for control performance and system stability before an actual apparatus is manufactured by MATLAB with SIMULINK including various functions those are composed of pre-design and system modeling.

소아에서 나타난 비구개관낭의 치험례

모정희,정현구,조태식,김효석,박성규,이난영 조선대학교 구강생물학연구소 2002 口腔生物學硏究 Vol.26 No.2

The nasopalatine duct cyst is the most common non-odontogenic cyst in the oral area and is thought to be originated from the epithelial remnants of the nasopalatine duct. The nasopalatine duct cyst have been mentioned to be an overall incidence of 1.7-11.9% of all jaw cyst. More males than females are affected by that. It could occur all around the age, and especially in their 40th and 60th it happens the most and in childhood it is very rare. Proper treatment for nasopalatine duct cyst is enucleation. In the case of very large cysts, it is likely to be a risk of naso-oral or antral-oral fistulas or of devitalization of teeth, marsupialization is indicated. The purpose of case report is that a nasopalatine duct cyst in is very rare in childhood. A 9-year-old boy was referred to the chosun university pedodontics clinic that this child who has anterior palatal swelling is in routine check. The size of the cyst was so big that the marsupialization was committed and obturator was put. This patient is on the continuous observation. we treated the nasopalatine duct cyst with obturator.

기후 모형 모수화 과정의 연구

Kyu-Tae Lee,Hi-Ku Cho,Jeong-Woo Kim,Seung-Man Lee,Tae-Young Lee,Kwang-Ho Lee 한국기상학회 1994 Asia-Pacific Journal of Atmospheric Sciences Vol.30 No.3

The Effects of Transplanting Time and Meteorological Change to Variation of Phyllochron of Rice

Ku, Bon-Il,Choi, Min-Kyu,Kang, Shin-Ku,Lee, Kyung-Bo,Park, Hong-Kyu,Park, Tae-Seon,Ko, Jae-Kwon,Lee, Byun-Woo The Korean Society of Crop Science 2010 Korean journal of crop science Vol.55 No.3

This study was performed at Rice and Winter Cereal Crops Department of NICS during 2007 and 2008 to investigate the characteristics of rice leaf emergence and to obtain basic data which can be used for rice growth simulation model by which we can forecast rice growth stage and heading date accurately under different cultivars, transplanting date, and climatic conditions. To confirm leaf emergence rate according to rice maturing ecotype, we surveyed the leaf emergence rate and heading date of Unkwangbyeo, Hwayoungbyeo and Nampyeongbyeo which are early maturing, medium maturing and medium-late maturing cultivars, respectively, according to seedling raising duration and transplanting time. When seedling duration was 15 days, the growth duration between transplanting time and completion of flag leaf emergence on main culm were 51.5~78.3 days in Unkwangbyeo, 55.3~87.9 days in Hwayoungbyeo and 58.4~98.4 days in Nampyeongbyeo, respectively. When seedling duration was 30 days, they were 50.1~75.5 days in Unkwangbyeo, 52.4~84.7 days in Hwayoungbyeo and 56.4~93.8 days in Nampyeongbyeo, respectively. As transplanting time delayed, the emerged leaf number after transplanting decreased in all rice cultivars. The cumulative temperature between transplanting time to completion of flag leaf elongation on main culm were $1,281^{\circ}C{\sim}1,650^{\circ}C$ in Unkwangbyeo, $1,344^{\circ}C{\sim}1,891^{\circ}C$ in Hwayoungbyeo and $1,454^{\circ}C{\sim}2,173^{\circ}C$ in Nampyeongbyeo, respectively. Leaf emergence rate on main culm were precisely represented by equation, y = $y_0$ + a / [1 + exp( - (x - $x_0$) / b)]^c, when we used daily mean temperature as variable.

피부미용이 관광객의 만족도와 재방문에 미치는 영향 -일본인 여성 관광객을 중심으로-

구태규 ( Tae Kyu Ku ),변정우 ( Jeoung Woo Byun ),박안나 ( An Na Park ) 한국미용학회 2010 한국미용학회지 Vol.16 No.3

According to the result of a public-opinion poll, conducted by AC Nielsen, institution for market survey, and intended for men and women of 47 countries, it was indicated that one-third of them spent money, for investing in themselves, on skin care more than on the other things. Skin care, one of the subjects for SIT (Special Interest Tourism), despite one type of higher value-added businesses in developed countries, has missed the possibility of becoming a product for tourism, bound in public health law and interested parties` demands. We hope that resources in Korea could be arranged and utilized, based on abundant andcompetent power of men; we aim at promoting tourists` revisit, by making them satisfied with a Korean new product on skin care, through investigations and researches on how this product affects Korean tourism. This research investigated the difference of tourist`s satisfaction on the use of skin care, targeting Japanese women tourists who visited Korea, by analyzing people who experienced skin care and the others who didn`t, in order to know whether skin care is appropriate as a product for tourism in the internationalized world. It revealed: all facilities and related services on skin care could raise tourists` satisfaction and their intention for revisit; people experiencing a skin treatment in korea wanted to revisit Korean and experience it again. The Korean tourism will have another chance for further development, if skin care is able to be specialized in promoting tourists` satisfaction and their intention for revisit.

망고 잎 생리활성 물질의 항산화 효과

구태규 ( Tae Kyu Ku ),유일수 ( Il Sou Yoo ),박안나 ( An Na Park ) 한국미용학회 2014 한국미용학회지 Vol.20 No.5

In this study was to examine the applicability of mango (MangiferaindicaL.) leaf extract to cosmetics a composition based on its antioxidant activity. Extracted with ethanol and water to obtain a 50% concentration of mango leaf extract (0.4, 2, 10, 50 mg/ml) as mango leaf collected in Jeju Island, Korea. In 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical assay, lower concentrations of mango leaf extract resulted in a dose-dependent increase in antioxidant activity compared to the synthetic antioxidant butylated hydroxytoluene (BHT). Total polyphenol and flavonoid contents were highest in the 50 mg/mL mango leaf extract. Cell viability and cytotoxicity were assessed in RAW 264.7 cells by ROS production, macrophages were exposed to various concentrations (10, 25, and 50 μL) of mango leaf extract. Reduced DCF fluorescence intensities indicating stronger antioxidant activities were observed in a mango leaf extract concentration-dependent manner. Nitrite scavenging activity also increased with higher concentrations of mango leaf extract, thus demonstrating the ability of mango leaf extract to inhibit nitrosamine production. Based on these results, mango leaves have excellent antioxidant activity and are safe to be incorporated and used as a component of cosmetics a composition.

Current Status and Future Prospective of Advanced Radiation Resistant Oxide Dispersion Strengthened Steel (ARROS) Development for Nuclear Reactor System Applications

Kim, Tae Kyu,Noh, Sanghoon,Kang, Suk Hoon,Park, Jin Ju,Jin, Hyun Ju,Lee, Min Ku,Jang, Jinsugn,Rhee, Chang Kyu Korean Nuclear Society 2016 Nuclear Engineering and Technology Vol.48 No.2

As one of the Gen-IV nuclear energy systems, a sodium-cooled fast reactor (SFR) is being developed at the Korea Atomic Energy Research Institute. As a long-term national research project, advanced radiation resistant oxide dispersion strengthened steel (ARROS) is being developed as an in-core fuel cladding tube material for a SFR in the future. In this paper, the current status of ARROS development is reviewed and its future prospective is discussed.

The Effects of Transplanting Time and Meteorological Change to Variation of Phyllochron of Rice

Bon-Il Ku,Min-Kyu Choi,Shin-Ku Kang,Kyung-Bo Lee,Hong-Kyu Park,Tae-Seon Park,Jae-Kwon Ko,Byun-woo Lee 韓國作物學會 2010 한국작물학회지 Vol.55 No.3

This study was performed at Rice and Winter Cereal Crops Department of NICS during 2007 and 2008 to investigate the characteristics of rice leaf emergence and to obtain basic data which can be used for rice growth simulation model by which we can forecast rice growth stage and heading date accurately under different cultivars, transplanting date, and climatic conditions. To confirm leaf emergence rate according to rice maturing ecotype, we surveyed the leaf emergence rate and heading date of Unkwangbyeo, Hwayoungbyeo and Nampyeongbyeo which are early maturing, medium maturing and medium-late maturing cultivars, respectively, according to seedling raising duration and transplanting time. When seedling duration was 15 days, the growth duration between transplanting time and completion of flag leaf emergence on main culm were 51.5~78.3 days in Unkwangbyeo, 55.3~87.9 days in Hwayoungbyeo and 58.4~98.4 days in Nampyeongbyeo, respectively. When seedling duration was 30 days, they were 50.1~75.5 days in Unkwangbyeo, 52.4~84.7 days in Hwayoungbyeo and 56.4~93.8 days in Nampyeongbyeo, respectively. As transplanting time delayed, the emerged leaf number after transplanting decreased in all rice cultivars. The cumulative temperature between transplanting time to completion of flag leaf elongation on main culm were 1,281~circC~1,650~circC in Unkwangbyeo, 1,344~circC~1,891~circC in Hwayoungbyeo and 1,454~circC~2,173~circC in Nampyeongbyeo, respectively. Leaf emergence rate on main culm were precisely represented by equation, y = y0 + a / [1 + exp( - (x - x0 ) / b)]c, when we used daily mean temperature as variable.

벼 2기작 재배를 위한 조기재배 환경에서 벼 생육 및 수량변화

구본일 ( Bon Il Ku ),최민규 ( Min Kyu Choi ),강신구 ( Shin Ku Kang ),박태선 ( Tae Seon Park ),김영두 ( Young Doo Kim ),박홍규 ( Hong Kyu Park ),고재권 ( Jae Kwon Ko ),이변우 ( Byun Woo Lee ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.5

This study was carried out to evaluate the possibility of rice double cropping in Korea by assessing the growth and yield performance of rice cultivars transplanted at the extremely-early date. When the transplanted rice seedling was exposed to low temperature below 0oC, the survival rate decreased drastically. However, short exposure to below 0oC one or two times did not damage transplanted rice seedling so severely. Thus, the earliest transplanting in spring would be possible when minimum temperature rises above 0oC. Compared with the conventional seedling nursery tray (CSNT), seedling rearing with the potted nursery tray was more effective for increasing leaf age and seedling dry weight during nursery period. In the first rice cropping, rice cultivation with seedlings reared in PSNT showed shorter growth duration and cumulative temperature from transplanting to heading than that with seedlings reared in CSNT. The earliest heading date on July 4 in Jinbuolbyeo was earlier by two to three days than that of Dunaebyeo. If rice has not exposed to cold damage, the earliest heading date of Jinbujolbyeo can advance to June 30 or July 1. In this case, rice harvest would be possible on August 5, enabling the rice transplanting of the second rice cropping before August 10. At transplanting time with low temperature damage rice yield were less than 400 kg/10a while rice yield exceeded 400 kg/10a at transplanting time without low temperature damage.