• 한국작물학회지
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• 제20권
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• pp.95-99
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• 1975

해바라기에 있어서 일장반응의 품종간차이를 알고자 1974년 7월부터 10월까지 조중만생종 3개 품종을 폿트에 파종하여 옥내인 온실과 옥외인 자연상태에서 단일 및 장일의 일장처리를 하여 각 품종의 개화반응을 조사한 결과를 요약하면 다음과 같다. 1. 조생종인 Peredovic의 개화기는 8시간 및 12시간구에서 비슷하고 16시간구보다 10일 단축되였으나 각 일장처리구 모두 실내가 옥외보다 11∼15일 빨랐다. 2. 중생종인 Hungary의 개화기는 옥내에서 각 일장처리구가 거의 비슷하였으나 옥외에서는 12시간구가 8시간구 및 16시간구보다 7∼11일 빨랐다. 3. 만생종인 군포종의 개화기는 제일 늦었으나 8시간 및 12시간구에서는 비슷하고 16시간구보다 14일 단축되였으나 옥내가 옥외보다 10∼21일 빨랐다. 4. 조생종인 Peredovic은 옥내외의 적산온도차가 적어 일장보다 온도가 그리고 중만생종인 Hungary와 군포종은 옥내외 적산온도차가 커 온실보다 일장에 더 예민한 것 같다. 5. 해바라기의 개화반응은 숙기의 조만에 거의 관계없이 8∼12시간의 단일하에서 개화일수가 단축되고 16시간구에서 연장되었으며 그 정도는 품종간 차이를 보였다.

• 한국연초학회지
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• 제11권2호
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• pp.127-134
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• 1989

Several growth characteristics of two ornamental tobacco species, Nicotiana sanderae and N. affinis, were investigated in this study. Also effect of temperature and daylength on the flowering of the tobacco plants were evaluated to obtain basic information on breeding and cultivation. 1. The plants were great in high temperature-long day at the early stage and in low temperature-short day at the late stage of plant growth, for both Nicotana species. At the early growth stage the leaf length N. sanderae was great in high temperature-long day, and that of N. affinis was great in high temperature-short day period, while at the late stage of the plant growth the leaf lengths were more significantly effected by the temperature rather than daylength. Leaf width and leaf shape index were less sensitive to the conditions. 2. For both of the species, the total number of tobacco leaves not much influenced by the temperature and daylength. 3. There were no significant differences for budding and flowering period between the two species, both of which were sensitive to temperature and daylength with more influence by daylength than temperature. 4. Number of floral stalks, number of flower and flowering period were not much influenced by temperature and daylength; however, N. affinis had 2 more floral stalks, 31 more flowers, and 6 day longer flowering period than N. sanderae.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.819-821
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• 2005

Since the System Marginal Price (SMP) is a vital factor to the market entities who intend to maximize the their profit, the short-term marginal price forecasting should be performed correctly. In a electricity market, the short-term trading between the market entities can be generally affected a short-term market price. Therefore, the exact forecasting of SMP can influence on the profit of market participants. This paper presents a methodology of day-ahead SMP foretasting using Autoregressive Integrated Moving Average (ARIMA). To show the efficiency and effectiveness of the proposed method, the numerical studies have been performed using historical data of SMP in 2004.

• 천문학논총
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• 제22권4호
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• pp.141-149
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• 2007

Preliminary time-series observations for short-period variability survey (SPVS) were carried out using a 155mm refractor and a $2k{\times}3k$ CCD camera at Bohyunsan Optical Astronomy Observatory. We found 21 new variable stars in the $90'{\times}60'$ test field region : 9 eclipsing binary stars, $5{\delta}$ Scuti type stars, a ${\gamma}$ Doradus type star, and 6 long period variables. The observing field center is R.A. $05^h\;00^m\;00^s$, DEC. $50^{\circ}\;00'\;00"$ (J2000.0). The period and amplitude ranges for the short-period variables, i.e., ${\delta}$ Scuti stars, were 0.052day - 0.107day and 0.012mag - 0.064mag, respectively.

• Clinical and Experimental Reproductive Medicine
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• 제24권3호
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• pp.361-368
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• 1997

A total of 55 patients with various etiologies of infertility particitated in a study comparing two regimens of controlled ovarian hyperstimulation (COH) with GnRH agonists and gonadotropins. Nineteen patients were given an ultra-short stimulation protocol when the agonist was administered for 3 day from Day 2 of the cycle. The remaining 36 patients were given a long stimulation protocol when the agonist was administered from the mid-luteal phase of the cycle preceding the stimulation cycle. The mean number of gonadotropins used per patient was not different between two groups. No significant differences were found in the mean number of oocytes recovered, fertilization rate and embryo cleavage rate between two groups. Pregnancy and delivery rates were higher in ultra-short protocol than in long protocol, but these were not significant. These results suggest that an ultra-short protocol is as effective as a long protocol in in-vitro fertilization and embryo transfer.

• 한국작물학회지
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• 제21권2호
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• pp.211-217
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• 1976

감광성 수도품종 BPI-76을 공시하여 단일기간의 암기중 광간섭이 출수에 미치는 영향을 검토하여 다음과 같은 결과를 얻었다. 1. 공시품종의 최소단일처리회수인 12일의 단일기간중 간에 실시한 1분정도의 광간섭에 의해서도 단일효과의 집적은 방해를 받았고 10분이상의 광처리를 하면 단일효과가 크게 억제되었다. 2. 12회의 단일기간중 암기중간에 1∼15분간의 광처리를 7일이상 그리고 30분간의 광간섭을 4일이상 계속 받으면 전공시개체가 출수를 하지않아 광간섭의 누적효과를 보여 주었다. 3. 단일기간의 암기중간에 5분 또는 30분간의 광처리를 1회 실시하여서는 2∼10일간 집적된 단일효과를 크게 소거시키지 못했으나 1일1회씩 3일간 계속 광간섭을 하면 2∼8일간 집적된 단일효과를 크게 소거시켰다. 4. 13일간의 단일기간중 4∼8일간의 단일처리후 1회 또는 3회의 광간섭을 받은경우에 출수유제현상이 심하게 나타났다. 5. 13일간의 단일기간중에 실시한 1일간의 장일처이는 2일간의 단일처리효과를 완전히 소거시켰으나 4∼8일간의 단일처리효과는 완전히 소거시키지 못했으며 2일간의 장일처리는 4일간의 단일처리효과를 그리고 2∼4일간의 장일처리는 6∼8일간의 단일처리효과를 크게 소거시켰다. 6. 13일간의 단일기간중 8일간의 단일처리후 장일처리를 받았을 때 출수억제현상이 가장 심하게 나타났다. 7. 10회의 단일처리후 장일상태가 계속되면 분화된 유수는 퇴화되었고 15회의 단일처리를 한경우에도 그후의 장일에 의해서 유수의 발육속도가 늦어져 단일상태가 게속된 경우보다 출수가 지연되었다.

• Journal of Chest Surgery
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• 제18권4호
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• pp.740-745
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• 1985

A retrospective double blind study comparing 7 day with 2 day regimen of antibiotic prophylaxis was conducted among 200 patients undergoing open heart surgery. No case of endocarditis and wound infection occurred. Pneumonia developed in 5 cases of the 7 day and 1 case of the 2 day group. Urinary tract infection without clinical significance developed in 1 case of the 7 day and 3 cases of the 2 day group. Bacteremia developed in 2 cases of the 7 day and 1 case of the 2 day group. We concluded as follows: l. Administration of antibiotics for 2 days appears to be without substantial risk of infection comparing long term 7 day regimen. 2. 7 days of antibiotics may actually increase the risk of serious infection such as nosocomial pneumonia, and predispose to the development of infections with fungi or antibiotic resistant bacteria. 3. 2 days of prophylaxis is more beneficial than long term 7 day regimen for example economically.

• 농업과학연구
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• 제5권2호
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• pp.43-48
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• 1978

단일조건하(短日條件下)에서의 수도출수기(水稻出穗期)의 유전(遺傳)에 관(關)한 정보(情報)를 얻고자 농백(農白)을 위시한 5개(個) 수도품종(水稻品種)의 전조합(全組合) 이면교배(二面交配)를 실시(實施)하여 얻은 $F_2$를 자연일장(自然日長)과 단일하(短日下)에 각각 재배(栽培)한 후 출수(出穗)까지 일수(日數)를 조사(調査)하여 유전분석(遺傳分析)을 수행(遂行)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 자연일장하(自然日長下)에서는 농백(農白)${\times}$팔굉(八紘) 및 농백(農白)${\times}$만경조합(萬頃組合)을 제외(除外)한 나머지 조합(組合)은 모두 양친(兩親)의 평균출수기(平均出穗期)보다 출수기(出穗期)가 지연(遲延)되었으나 단일하(短日下)에서는 만경(萬頃)${\times}$금남풍조합(金南風組合)의 출수기(出穗期)만 양친(兩親)의 평균출수기(平均出穗期)와 같았고 그 외조합(外組合)의 출수기(出穗期)는 모두 양친(兩親)의 평균출수기(平均出穗期)보다 현저(顯著)히 단축(短縮)되었다. 2. 자연일장하(自然日長下)에서는 비대립유전자(非對立遺傳子) 상호간(相互間)의 상호작용(相互作用)을 인정(認定)할 수 있었으나 단일하(短日下)에서의 출수기유전(出穗期遺傳)에서는 비대립유전자(非對立遺傳子) 상호간(相互間)의 상호작용(相互作用)은 인정(認定)되지 않았으며 상가적(相加的) 효과(效果)가 우성효과(優性效果)보다 큰 부분우성(部分優性)을 나타내었다. 3. 자연일장하(自然日長下)에서는 통일(統一), 금남풍(金南風)이 우성대(優性帶)에 농백(農白)이 열성대(劣性帶)에 위치(位置)하고 있었으나 단일조건하(短日條件下)에서는 농백(農白), 만경(萬頃)이 우성대(優性帶)에 통일(統一)은 열성대(劣性帶)에 위치(位置)하였다. 4. 자연일장하(自然日長下)에서는 우성효과(優性效果)가 상가적(相加的) 효과(效果)에 비(比)해 크게 나타났고 광의(廣義) 및 협의(俠義)의 유전력(遺傳力)은 아주 낮았으나 단일하(短日下)에서는 우성효과(優性效果)에 비9比)해 상가적(相加的) 효과(效果)가 현저(顯著)히 컸으며 광의(廣義) 및 협의(俠義)의 유전력(遺傳力)이 모두 높았다.

• Journal of Electrical Engineering and Technology
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• 제12권1호
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• pp.64-71
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• 2017

Considering the volatility, intermittent and random of photovoltaic (PV) generation systems, accurate forecasting of PV power output is important for the grid scheduling and energy management. In order to improve the accuracy of short-term power forecasting of PV systems, this paper proposes a prediction model based on environmental factors and support vector machine optimized by genetic algorithm (GA-SVM). In order to improve the prediction accuracy of this model, weather conditions are divided into three types, and the gray correlation coefficient algorithm is used to find out a similar day of the predicted day. To avoid parameters optimization into local optima, this paper uses genetic algorithm to optimize SVM parameters. Example verification shows that the prediction accuracy in three types of weather will remain at between 10% -15% and the short-term PV power forecasting model proposed is effective and promising.

• Toxicological Research
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• 제20권2호
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• pp.117-122
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• 2004

The present study was carried out to establish a short-term teratogenicity study for detecting developmental toxic potential induced by gamma radiation in ICR mice. Pregnant mice were exposed at dose levels of 0, 0.5, 1, 2, or 4 Gy on gestational day 8.5. All dams were subjected to caesarean section on gestational day 10.5 and their embryos were examined for growth, differentiation, and morphological abnormalities. An increase in the number of resorption was found at 4 Gy in a dose-dependent manner. Dose-dependent decreases in the developmental score of yolk sac circulation and olfactory system at above 1 Gy, in the number of somite pairs and developmental score of allantois, optic system, and maxillary process at above 2 Gy, and in the all growth and developmental parameters examined at 4 Gy were found. Various types of morphological abnormalities were seen at dose levels of 0.5 Gy or greater. Characteristic malformations induced by gamma radiation were abnormal axial rotation, hematoma, craniofacial hypoplasia, open neuropore, shortened prosencephalon, kinked somites, irregular somites, swelling, hydropericardium, absent branchial bar, and absent limb bud. Morphological alterations such as hematoma, craniofacial hypoplasia, open neuropore, and kinked somites were noted even in the lowest dose (0.5 Gy). These results indicated that the short-term teratogenicity study established in this study can be a useful tool for not only detecting the developmental toxic potential induced by gamma radiation, but also screening radio-protective agents in ICR mice.