• Title/Summary/Keyword: Forcing

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Analyzing off-line Noah land surface model spin-up behavior for initialization of global numerical weather prediction model (전지구수치예측모델의 토양수분 초기화를 위한 오프라인 Noah 지면모델 스핀업 특성분석)

  • Jun, Sanghee;Park, Jeong-Hyun;Boo, Kyung-On;Kang, Hyun-Suk
    • Journal of Korea Water Resources Association
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    • v.53 no.3
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    • pp.181-191
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    • 2020
  • In order to produce accurate initial condition of soil moisture for global Numerical Weather Prediction (NWP), spin-up experiment is carried out using Noah Land Surface Model (LSM). The model is run repeatedly through 10 years, under the atmospheric forcing condition of 2008-2017 until climatological land surface state is achieved. Spin-up time for the equilibrium condition of soil moisture exhibited large variability across Koppen-Geiger climate classification zone and soil layer. Top soil layer took the longgest time to equilibrate in polar region. From the second layer to the fourth layer, arid region equilibrated slower (7 years) than other regions. This result means that LSM reached to equilibrium condition within 10 year loop. Also, spin-up time indicated inverse correlation with near surface temperature and precipitation amount. Initialized from the equilibrium state, LSM was spun up to obtain land surface state in 2018. After 6 months from restarted run, LSM simulates soil moisture, skin temperature and evaportranspiration being similar land surface state in 2018. Based on the results, proposed LSM spin-up system could be used to produce proper initial soil moisture condition despite updates of physics or ancillaries for LSM coupled with NWP.

The change of East Asian Monsoon to $CO_2$ increase

  • Kripalani, R.H.;Oh, J.H.;Chaudhari, H.S.
    • The Korean Journal of Quaternary Research
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    • v.20 no.1 s.26
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    • pp.9-27
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    • 2006
  • The East Asian (China, Korea and Japan) summer monsoon precipitation and its variability are examined from the outputs of the 22 coupled climate models performing coordinated experiments leading to the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) following the multi-model ensemble (MME) technique. Results are based on averages of all the available models. The shape of the annual cycle with maximum during the summer monsoon period is simulated by the coupled climate models. However, models fail to simulate the minimum peak in July which is associated with northward shifts of the Meiyu-Changma-Baiu precipitation band. The MME precipitation pattern is able to capture the spatial distribution of rainfall associated with the location of the north Pacific subtropical high and the Meiyu-Changma-Baiu frontal zone. However precipitation over the east coast of China, Korea-Japan peninsular and the adjoining oceanic regions is underestimated. Future projections to the radiative forcing of doubled $CO_2$ scenario are examined. The MME reveals an increase in precipitation varying from 5 to 10 %, with an average of 7.8 % over the East Asian region at the time of $CO_2$ doubling. However the increases are statistically significant only over the Korea-Japan peninsula and the adjoining north China region. The increase in precipitation may be attributed to the projected intensification of the subtropical high, and thus the associated influx of moist air from the Pacific to inland. The projected changes in the amount of precipitation are directly proportional to the changes in the strength of the subtropical high. Further a possible increase in the length of the summer monsoon precipitation period from late spring through early autumn is suggested.

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Climate Change Impact on the Flowering Season of Japanese Cherry (Prunus serrulata var. spontanea) in Korea during 1941-2100 (기후변화에 따른 벚꽃 개화일의 시공간 변이)

  • Yun Jin-I.
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.8 no.2
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    • pp.68-76
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    • 2006
  • A thermal time-based two-step phenological model was used to project flowering dates of Japanese cherry in South Korea from 1941 to 2100. The model consists of two sequential periods: the rest period described by chilling requirement and the forcing period described by heating requirement. Daily maximum and minimum temperature are used to calculate daily chill units until a pre-determined chilling requirement for rest release is met. After the projected rest release date, daily heat units (growing degree days) are accumulated until a pre-determined heating requirement for flowering is achieved. Model calculations using daily temperature data at 18 synoptic stations during 1955-2004 were compared with the observed blooming dates and resulted in 3.9 days mean absolute error, 5.1 days root mean squared error, and a correlation coefficient of 0.86. Considering that the phonology observation has never been fully standardized in Korea, this result seems reasonable. Gridded data sets of daily maximum and minimum temperature with a 270 m grid spacing were prepared for the climatological years 1941-1970 and 1971-2000 from observations at 56 synoptic stations by using a spatial interpolation scheme for correcting urban heat island effect as well as elevation effect. A 25km-resolution temperature data set covering the Korean Peninsula, prepared by the Meteorological Research Institute of Korea Meteorological Administration under the condition of Inter-governmental Panel on Climate Change-Special Report on Emission Scenarios A2, was converted to 270 m gridded data for the climatological years 2011-2040, 2041-2070 and 2071-2100. The model was run by the gridded daily maximum and minimum temperature data sets, each representing a climatological normal year for 1941-1970, 1971-2000, 2011-2040, 2041-2070, and 2071-2100. According to the model calculation, the spatially averaged flowering date for the 1971-2000 normal is shorter than that for 1941-1970 by 5.2 days. Compared with the current normal (1971-2000), flowering of Japanese cherry is expected to be earlier by 9, 21, and 29 days in the future normal years 2011-2040, 2041-2070, and 2071-2100, respectively. Southern coastal areas might experience springs with incomplete or even no Japanese cherry flowering caused by insufficient chilling for breaking bud dormancy.

Using Balanced Scorecard to Explore Learning Performance of Enterprise Organization

  • Chiu, Chung-Ching;Tsai, Chih-Hung;Chung, Yi-Chan
    • International Journal of Quality Innovation
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    • v.8 no.1
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    • pp.40-75
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    • 2007
  • In the early industrial age which with high intensity of machine and labor, using financial measurement index was good enough to tie in company's mechanization and philosophy of management and been in efficiency. But being comply with "New Economic age," a new economic environment is full of knowledge and information, the enterprise competition had changed from tangible assets, plants to intangible innovation ability of knowledge. As recognizing the new tendency by enterprise, they value gradually the growth and influence from learning. Practice of organization learning not only needs firm structure and be in coordination with both hardware and software, but also needs an affect measurement model to offer enterprise to estimate learning performance. It's a good instrument of financial performance measure mold in the past years, But it's for measuring the past, couldn't formulate enterprise trend to future, hard to estimate investment for future, such as development of products, organization learning, knowledge management etc, as which intangible assets and knowledge ability just the key factors of being win around competition environment in the future. In 1992, Kaplan and Norton brought up Balance Scorecard (BSC) on Harvard Business Review, as an instrument helping enterprise to measure performance, which is being considered to be a most influence management instrument. It added non-financial index such as customer, internal process and learning growth besides traditional financial index, as offering enterprise an index to measure and manage intangible assets and intellectual property. As being aware of organization learning is hard to be ignored in the new economic age, this research is based on learning and growth of BSC, and citing one national material company try to let the most difficult measurement performance of organization learning, to be estimate through BSC, analyze of factor and individual case, to discuss the company how to make the related strategy and vision of organization learning to develop learning and growth of the structure of BSC, subject the matter of out put factors to be discussed, and measure the outcomes as a result of research. The research affect offers (1) the base implement procedure of carrying out BSC; (2) the reference of formulating measurement index while enterprise using BSC to estimate performance of organization learning; (3) the possibility bottleneck maybe forcing while carrying out BSC, to be an improvement or preventive for enterprise.

A Technical Guide to Operational Regional Ocean Forecasting Systems in the Korea Hydrographic and Oceanographic Agency (I): Continuous Operation Strategy, Downloading External Data, and Error Notification (국립해양조사원 해양예측시스템 소개 (I): 현업 운영 전략, 외부 해양·기상 자료 내려 받기 및 오류 알림 기능)

  • BYUN, DO-SEONG;SEO, GWANG-HO;PARK, SE-YOUNG;JEONG, KWANG-YEONG;LEE, JOO YOUNG;CHOI, WON-JIN;SHIN, JAE-AM;CHOI, BYOUNG-JU
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.22 no.3
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    • pp.103-117
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    • 2017
  • This note provides technical guide on three issues associated with establishing and automatically running regional ocean forecasting systems: (1) a strategy for continuous production of hourly-interval three-day ocean forecast data, (2) the daily download of ocean and atmospheric forecasting data (i.e., HYCOM and NOAA/NCEP GFS data), which are provided by outside institutions and used as initial condition, surface forcing, and boundary data for regional ocean models, and (3) error notifications to numerical model managers through the Short Message Service (SMS). Guidance on dealing with these three issues is illustrated via solutions implemented by the Korea Hydrographic and Oceanographic Agency, since in embarking on this project we found that this procedural information was not readily available elsewhere. This technical guide is based on our experiences and lessons learned during the process of establishing and operating regional ocean forecasting systems for the East Sea and the Yellow and East China Seas over the 5 year period of 2012-2016. The fundamental approach and techniques outlined in this guide are of use to anyone wanting to establish an automatic regional and coastal ocean forecasting system.

'Asian Flame' an Asiatic Hybrid Lily with Unspotted Red Petals (무반점 적색 아시아틱 나리 '아시안플레임' 육성)

  • Rhee, Hye-Kyung;Cho, Hae-Ryong;Lim, Jin-Hee;Kim, Mi-Seon;Park, Sang-Kun;Shin, Hak-Ki;Joung, Hyang-Young
    • Horticultural Science & Technology
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    • v.28 no.3
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    • pp.519-521
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    • 2010
  • An Asiatic lily cultivar 'Asian Flame' was bred in 2007 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA) of Korea. The crossing was conducted between female parent A94-34 ('Montreux' ${\times}$ 'Anabelle') and male parent 'Fire' by stigmatic pollination at Suwon in 1996. First selection was done and tentatively named as A98-98 in 1998. After in vitro multiplication and bulb production of A98-98 line, growth and flowering characteristic tests has been conducted from 2005 to 2007. The evaluation of characteristics and preference were surveyed at a lily flower show of NIHHS in 2007 in Taean. The new cultivar 'Asian Flame' flowers in middle of June and grows to an average of 122.7 cm in height. Flowers bloom upward-facing, red (RHS 45B) petals. Year-round flowering is possible by storage of the bulb under $-1.5^{\circ}C$ conditions. For forcing culture, it is necessary to add calcium to the fertilizer or remove side scales of large bulb to prevent leaf scorch.

Children's Unbalanced Diet and Parents' Attitudes (유아의 편식실태 및 편식에 대한 학부모의 태도 조사)

  • Oh Yu-Jin;Chang Yu-Kyung
    • Journal of Nutrition and Health
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    • v.39 no.2
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    • pp.184-191
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    • 2006
  • This study investigated parents' attitude about children's unbalanced diet. The subjects were 1,309 parents that their children attended at kindergarten or child care center in Kyoung-Ki province. The order of dislikes in 'vegetables and fruits' was as follows: all kinds of vegetables (56.6%), beans (17.6%), fruits (5.2%). In 'meat, fish, poultry', the order of dislikes was meats (38.2%), fishes (21.8%), milk (16.4%), eggs (10.0%). In 'cerelas', the order of dislikes was rice (31.0%), rice cakes (14.3%), noodles (11.9%). The several rationalizations for dislikes are 'taste' (19.1 %), 'food habit from younger age' (18.4%), 'lack of chances for trying new food' (16.0%) etc. To compared children's rationalizations for dislikes to their age group, the percentage of 'lack of chances for trying new food', 'strange food shape', 'lack of nutrition education' was significantly higher in 'below 5 years old' (<5) group than other groups (<6, <7) and 'sweety food' was significantly higher in 'below 7 years old' (<7) group than other groups (<6, <7)(p <0.05). In parents' attitude about children's unbalanced dietary habit, subjects answered that they try to make children understand to eat dislike food (73.9%), develop new recipe for children (14.0%), neglect children's food habit (6.2%). To compared parents' attitude for children's unbalanced diet by parents age, the percentage of 'try to make children understand to eat dislike food' was significantly higher in 'below 30 years old' (<30) group than other groups ($30{\sim}35,\;35{\sim}39,\;{\geq}40$) and 'developing new recipe' was significantly higher in 'over 40 years old' (${\geq}40$) group than other groups ($<30,\;30{\sim}35,\;35{\sim}39$)(p < 0.05). To compared parents' attitude for children's unbalanced diet by parents' occupation, the percentage of 'neglecting' was higher in employed group and 'developing new recipe' was higher in unemployed group than the other group. According to the results of the survey, it is necessary to make new educational materials for employed parents and young children and develop new recipes to use various kind of foods instead of forcing unpleasant foods on the children for the sake of unbalanced diet.

Effects of Supplier's Competence on Customer-Supplier Long-term Relationships : with emphasis on the cosmetics industry (공급업자 역량이 공급업자와 구매업자의 장기지향적 거래관계에 미치는 영향: K화장품 기업을 중심으로)

  • Lee, Yong-Hak;Han, Sang-Lin;Na, June-Hee;Yoon, Dong-Han
    • Journal of Distribution Research
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    • v.13 no.4
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    • pp.71-95
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    • 2008
  • Transaction between industrial suppliers and their buyers in business markets increasingly take place in the form of long-tenn business relationships. These relationships are governed through formal or informal agreements. Dynamic business markets are also forcing B2B marketers to create flexibility in their firms. However, buyers are bound in their rationality and find it impossible to contemplate all possible future contingencies. The more formal and detailed the contracts they conclude, the likelier it becomes that at least one buyer is going to perceive a need to adjust the initial agreement as environmental events unfold. In this case, the actor relies upon industrial supplier's competence. Our study purpose is to examine the consequences of supplier's competence on the industrial customer-supplier long-tenn relationship. Antecedent variables of supplier competence include R&D, flexibility, brand asset, market sensing, and customer support service. We presented a comprehensive constructive model consisting of components of supplier's competence and the antecedent factors. Research hypotheses were developed and data were gathered from respondents who work in the cosmetics industry. The results discussed here represent a first step towards a better understanding of the role of supplier competence in the B-to-B cosmetics industry. Managerial implications and the limitations of this research were also discussed.

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Studies on the Juvenile Grafts with Plastic Tubes for Forcing Stock Growth in Juglans sinensis (호도나무 대목촉성재(臺木促成材) Plastic원통(圓筒)을 이용(利用)한 유경녹기(幼莖綠技) 접목(接木)에 관(關)한 연구(硏究))

  • Youn, Ki Sik;Goo, Gwan Hyo;Jo, Chung Suk
    • Journal of Korean Society of Forest Science
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    • v.78 no.2
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    • pp.189-197
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    • 1989
  • This study was carried out to produce the grafts of Juglans sinensis by juvenile grafting method which epicotyl of newly germinated seeds were used as stocks and juvenile fresh shoots were used as scion. The results obtained were as follows ; 1. When plastic tube installed covering up seed with soil up to 6cm height for diameter increment of epicotyl, the epicotyl can be grown up to thickness of 10mm. 2. When the soft fruit branches and the soft water sprout with the terminal bud 8cm to 12cm long were used as scions, the survival rates showed 90 Percent. 3. The optimum date for making juvenile grafts was around the 20th of May, and the survival rates of grafted seedlings showed 86 percent in average. 4. The grafted seedlings showed first sprouting the 15th of June, that is 25 days after making graft, and the sprouting rate was 72 percent. 5. The height-growth of grafted seedlings finished at the end of July, and diameter growth lasted into the end of October. 6. There was positive correlation between the height of grafted seedlings and the diameter at root collar. 7. In general, it takes two years to make plantable graft seedlings from hardwood scion and stock, but the juvenile graft seedlings can be easily obtained in a year and so it seems to be economic.

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'Glory Pink' a FA Intersectional Lily with Unspotted Pink Petals (연한 분홍색 FAA 아속간 교잡나리 'Glory Pink' 육성)

  • Rhee, Hye Kyung;Cho, Hae Ryong;Lim, Jin Hee;Kim, Mi Seon;Park, Sang Kun;Joung, Hyang Young;Shin, Hak Ki
    • FLOWER RESEARCH JOURNAL
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    • v.17 no.1
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    • pp.40-43
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    • 2009
  • 'Glory Pink' an interspecific lily cultivar was released in 2007 at National Horticultural Research Institute (NHRI), Rural Development Administration (RDA), Suwon, Korea. The cross and ovule culture was made between FA interspecific hybrid 'FA97-30' (L. formolongi 'Raizan' ${\times}$ Asiatic lily 'A61'), a red colored cultivar, and Asiatic lily 'Sanzio', light red colored cultivar in 2001. Multiplication and bulbing, and characteristic tests were conducted from 2005 to 2006. Flowering time is around the first of July and the plant height is 131.7 cm. Flowers are upward-facing and red-pink (RHS 63C), with size of 11.3 cm. Petal length and width is 9.1 cm and 4.1 cm, respectively. Leaves are 13.8 cm long, 1.4 cm wide. The throat is dark green, and the stigma is light yellow and pollen is light brown. The weight and size of bulb is 51.1 g and 13.2 cm, respectively. For long-term storage, bulbs can be stored under -1 to -2 for year-round forcing.