경동맥 협착을 동반한 Takayasu 혈관염에서 경피적 스텐트 삽입술 : 단기 및 추적관찰 결과 Early and Long-Term Follow-up Results

편육범,윤영섭,박경진,김소영,심원흠 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.5

External validation of risk prediction platform for pancreatic fistula after pancreatoduodenectomy using artificial intelligence

So Jeong YOON,Jin-Young JANG,So Kyung YOON,Ji Hye JUNG,Sang Hyun SHIN,Jin Seok HEO,Yong Chan SHIN,Chang-Sup LIM,In Woong HAN 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.-

Investigation and Comparison of Korean Commercial Waxy Corn Hybrids

So, Yoon Sup · Oh, Tae yeung 忠北大學校 農業科學硏究所 2013 農業科學硏究 Vol.29 No.3

본문참고

Resistance to corn leaf aphid (Rhopalosiphum maidis Fitch) in tropical corn (Zea mays L.)

So, Yoon-Sup,Ji, Hee Chung,Brewbaker, James L. Springer-Verlag 2010 Euphytica Vol.172 No.3

Observational Study on the Recovery from Root Lodging at Flowering Time and Yield Reduction in Maize (Zea mays L.)

( Yoon Sup So ),( Victor O Adetimirin ),( Soon Kwon Kim ) 한국육종학회 2013 Plant Breeding and Biotechnology Vol.1 No.2

On August 2, 1999, the typhoon “Olga” with the maximum wind speed of 19.2 m/s hit the Korean peninsula and caused considerable damage to crops. Regional yield trials were at tasseling stage and were affected by the typhoon. After the storm, almost all the plants were root-lodged. This provided a rare chance to study the relationship between recovery from the lodging and reduction of grain yield in maize. Three check cultivars were examined for angle of lodging, grain yield, yield components, plant height and ear height. Six levels of leaning were classified. Plants leaning less than 10° from the vertical were considered as non-lodged. Average reduction in grain yield across five levels of lodging was 29.2% with the mean of 46.1°. The reductions of three hybrids were 25% for Suwon 19, 39.5% for Pioneer 3525 and 27.4% for DeKalb 689. R 2 values of grain yield on angles of lodging ranged from 0.33 for Suwon 19 to 0.51 for Pioneer 3525. The slope of the regression was lowest for Suwon 19 and highest for Pioneer 3525. Yield reduction from lodging was less severe for the locally bred Suwon 19. Reductions in yield components were also influenced by cultivars with Pioneer 3525 showing the most severe reduction. The yield components most severely affected by root lodging at the flowering time were ear length and number of kernels per row. The high reductions in yield and agronomic traits caused by root lodging justify the lodging resistance as a major breeding objective in Korea.

Case review on corn hybrid commercialization in South Korea

Yoon-Sup So 한국육종학회 2023 한국육종학회 공동학술발표집 Vol.2023 No.-

A new estimation algorithm of physical properties based on a group contribution and support vector machine

En Sup Yoon,이창준,이기백,Won So 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.3

There are two ways to evaluate the properties of unknown chemical compounds. One is by traditional approaches, which measure the desired data from the experiments and the other is by predicting them in the theoretical approaches using a kind of prediction model. The latter are considered to be more effective because they are less time consuming and cost efficient, and there is less risk in conducting the experiments. Besides, it is inconvenient to conduct experiments to obtain experimental data, especially for new materials or high molecular substances. Several methods using regression model and neural network for predicting the physical properties have been suggested so far. However, the existing methods have many problems in terms of accuracy and applicability. Therefore, an improved method for predicting the properties is needed. A new method for predicting the physical property was proposed to predict 15 physical properties for the chemicals which consist of C, H, N, O, S and Halogens. This method was based on the group contribution method that was oriented from the assumption that each fragment of a molecule contributes a certain amount to the value of its physical property. In order to improve the accuracy of the prediction of the physical properties and the applicability, we extended the database, significantly modifying the existing group contribution methods, and then established a new method for predicting the physical properties using support vector machine (SVM) which is a statistical theory that has never been used for predicting the physical properties. The SVM-based approach can develop nonlinear structure property correlations more accurately and easily in comparison with other conventional approaches. The results from the new estimation method are found to be more reliable, accurate and applicable. The newly proposed method can play a crucial role in the estimation of new compounds in terms of the expense and time.

작물육종연구 데이터분석에서 표준편차, 표준오차 및 신뢰구간의 선택과 해석

소윤섭(Yoon-Sup So) 한국육종학회 2016 한국육종학회지 Vol.48 No.2

Among agronomists, there appears to be a confusion in selecting among standard deviation (SD), standard error (SE) and confidence interval (CI) in reporting their results as figures and graphs. If there is a confusion in selection among them, there should also be difficulties in interpreting results published in peer-reviewed journals. This review paper aims to help researchers better suited for reporting their results as well as interpreting others by revisiting the definition of SD, SE and CI and explaining in plain words the concepts behind the formula. A variation among observation obtained from an experiment can be explained by the use of SD, a descriptive statistic. If one wants to draw an attention to a variation observed among plant germplasm collected from different regions or countries, SD can be reported along with the mean so that readers can get an idea how much variation exists in the particular set of germplasm. When the purpose of reporting experiment results is about inferring true mean of the population, it is advised to use SE or CI, both inferential statistics. For example, a certain chemical compound is to be quantified from plant materials, estimated mean with SD does not tell the range where the true mean content of the chemical compound would lie. It merely indicates how variable the measured values were from replications. In this case, it would be better to report the mean with SE or CI. The author recommends the use of CI over SE since CI is a sort of adjusted SE. The adjustment comes from t value that considers not only the probability but also n size.

의료환경 변화에 따른 감염성 심내막염의 양상 변화

신소연 ( So Youn Shin ),박윤수 ( Yoon Soo Park ),최준용 ( Jun Yong Choi ),조정호 ( Cheong Ho Cho ),박윤선 ( Yoon Seon Park ),김창오 ( Chang Oh Kim ),윤희정 ( Hee Jung Yoon ),김효열 ( Hyo Yul Kim ),염준섭 ( Jun Sup Yum ),이꽃실 ( K 대한내과학회 2005 대한내과학회지 Vol.68 No.2

목적 : 2000년 7월 국민 건강 증진, 보건 관련 비용의 감소, 약물 오 남용 방지 등의 취지로 의약분업이 시행되었다. 의약분업 이전에는 항생제의 구입에 별 다른 제약이 없었으나, 의약분업 이후 대부분의 항생제가 전문의약품으로 분류되면서 항생제의 구입시 의사의 처방전이 필요하게 되었다. 감염성 심내막염은 비특이적인 초기 임상증상으로 환자들이 내원 전 경구 항생제를 복용하는 경우가 많았다. 혈액배양 음성 감염성 심내막염의 가장 흔한 원인으로 내원 전 Background : In July 2000, there was a dramatic change in Korean health care system with the medical reform, the separation system of pharmacies and prescriptions. Before then, patients could easily get antibiotics without doctors` prescriptions. Since th

Evaluation of GSI(Gemstone Spectral Imaging) Mode for Contrast Reduction in Chest CT

소은섭(Eun-Sup So),심지나(Ji-Na Shim),김홍식(Hong-Sik Kim),윤수정(Soo-Jung Yoon),김윤국(Yoon-Kook Kim),박순규(Soon-Kyu Park) 대한CT영상기술학회 2019 대한CT영상기술학회지 Vol.21 No.2

목적: 조영증강 CT 검사는 CT의 발전과 함께 증가하고 있는 추세이다. 그러나 조영증강 CT 검사에서 조영제 사용으로 인한 조영제 부작용이 발생하고 있으며, 부작용을 최소화 하기 위한 다양한 연구도 계속되고 있다. 이에 조영제 사용량을 줄이기 위하여, dual energy CT를 이용한 GSI 모드의 영상을 활용하여 각 에너지 영역대에서 조영제가 영상에서 나타나는 특성에 대해 알아보고, 이를 통해 조영제를 감소시킬 수 있는 방법에 대하여 알아보고자 한다. 대상 및 방법: 이 연구는 phantom study와 patient study로 구분하였다. Phantom study에서는, 조영제와 생리식염수를 1:5로 희석하여 자체 제작한 phantom을 이용하여 dual energy 검사인 GSI(Gemstone spectral imaging) 모드를 이용하여 각 에너지 영역의 monochromatic 영상을 획득하였고, 또한 동일한 CTDIvol 값을 가지는 조건으로 single source를 이용한 polychromatic 영상을 얻은 후 각 영상의 HU, SNR, CNR 값을 비교하였다. Patient study에서는 본원에서 GSI모드로 Chest CT를 검사한 BMI 정상 군에 속해있는 환자 30명을 대상으로 각 에너지 영역의 monochromatic 영상에서 6부위의 HU값을 비교하였다. 결과: Phantom study에서 저에너지 영역으로 갈수록 높은 HU 값을 나타내었고, 50keV monochromatic 영상에서 SNR, CNR이 가장 높았으며 single source 영상의 값보다 각각 1.71배, 1.40배 높았다. 또한 그때 HU값은 1.92배 높았다. Patient study에서 뼈를 제외한 주변 조직이나 장기의 HU 값은 40~140 keV monochromatic 영상에서 에너지의 변화에 따른 HU값의 변화가 나타나지 않았으며, 조영제의 HU값은 40~70 keV monochromatic 영상에서 큰 변화를 보인다. 결론: 조영제를 주입한 Chest CT에서 GSI 모드를 통해 50 keV로 재구성함으로써, 현재 single source 영상과 비슷한 영상의 퀄리티를 가지고 공기를 포함하고 있는 폐 실질이나 기관지, 그리고 근육과 같은 조직은 HU 값을 유지하면서 조영제의 HU 값은 증가한 영상을 얻을 수 있다. 따라서 GSI 모드를 통한 chest CT는 조영제 투여량을 감소시킬 수 있으며 이는 조영제 부작용을 감소하는데 큰 기여를 할 것으로 사료된다. PURPOSE: Contrast-enhanced CT is on the increase with the development of CT. However, the use of contrast has caused side effects, and various studies have been conducted to minimize side effects. In order to reduce the amount of contrasts used in dual energy CT, we investigated the characteristics of the contrast in each energy region using GSI mode image, and the ways to minimize the use of contrast. MATERIAL AND METHODS: We performed both phantom and patient study. In the phantom study, monochromatic images of each energy region were obtained by GSI (gemstone spectral imaging) mode in a dual energy CT using phantom which consist of contrast and normal saline in a ratio of 1:5. In addition, the polychromatic images using a single source under the same CTDIvol were obtained and compared with HU, SNR, and CNR values of images in GSI mode. In the patient study, we compared the HU values at six-ROI in monochromatic images of each energy region. The subject of patient study was 30 patients in normal BMI group who underwent chest CT in GSI mode at Yonsei medical center. RESULT: In phantom study, high HU value was observed in the low energy region. The SNR and CNR of 50 keV monochromatic images were higher than those of single source images by 1.71 times and 1.40 times, respectively. At that time, the HU value of GSI mode was higher than single source by 1.92 times. In the patient study, the HU values of peripheral tissues or organs except for bones were not changed by 40 ~ 140 keV monochromatic images, and the HU values of the contrast showed large changes in 40 ~ 70keV monochromatic images. CONCLUSIONS: The quality of reconstructed image with GSI mode in 50 keV was similar to that of single source image. In addition, HU values of contrast increased while keeping HU values of muscles, bronchi, and lung parenchyma which contain air. Therefore, chest CT using GSI mode can decrease the dose of contrast so it might contribute to the reduction of contrast side effects.