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조재성(Jae sung Cho),이형우(Hyung woo Lee),서강철(Gang cheol Seo) 한국농업정책학회, 한국축산경영학회 2017 농업경영정책연구 Vol.44 No.2
This study develops an economic model for simulating policy effects on Hanwoo market and forecasting the number of raised and slaughtered Hanwoo, the wholesale and farm price of Hanwoo. We analyzed the structure of Hanwoo market and the factors affecting the market supply and demand. The model is composed of supply, demand, and price parts. Individual equations in each part are estimated through Excel’s solver or a statistical software. Forecasting error of each equation is examined using the measure of Mean Absolute Percentage Error (MAPE). The results of prediction accuracy verification reveal high prediction capability of the estimated equations.
조재성 ( Cho Jae-sung ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
구조용집성재(glued laminated timber)는 lamina라고 불리는 element를 섬유방향이 일치되도록 길이, 폭, 두께 방향으로 집성, 접착하여 제조한 목질재료이며, 사용 목적에 따라 다양한 형태와 크기로 제조한 건축 재료다. 수종에 따라 접착 특성에 차가 있으므로 사용하는 접착제에 따라 선정할 필요가 있다. 접착 내구성의 관점으로부터 비중, 강도, 수축팽창률의 차가 큰 수종과의 혼용은 피하는 것이 좋다. 구조용집성재의 품질유지를 위해서는 균, 벌레에 의한 생물 열화와 이 밖의 원인에 의해 발생하는 비생물에 의한 열화를 파악하고 있어야 한다.
조재성 ( Cho Jae-sung ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
구조용집성재(glued laminated timber)는 lamina라고 불리는 element를 섬유방향이 일치되도록 길이, 폭, 두께 방향으로 집성, 접착하여 제조한 목질재료이며, 사용 목적에 따라 다양한 형태와 크기로 제조한 건축 재료다. 수종에 따라 접착 특성에 차가 있으므로 사용하는 접착제에 따라 선정할 필요가 있다. 접착 내구성의 관점으로부터 비중, 강도, 수축팽창률의 차가 큰 수종과의 혼용은 피하는 것이 좋다. 구조용집성재의 품질유지를 위해서는 균, 벌레에 의한 생물 열화와 이 밖의 원인에 의해 발생하는 비생물에 의한 열화를 파악하고 있어야 한다.
조재성 ( Cho Jae-sung ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
구조용집성재(glued laminated timber)는 lamina라고 불리는 element를 섬유방향이 일치되도록 길이, 폭, 두께 방향으로 집성, 접착하여 제조한 목질재료이며, 사용 목적에 따라 다양한 형태와 크기로 제조한 건축 재료다. 수종에 따라 접착 특성에 차가 있으므로 사용하는 접착제에 따라 선정할 필요가 있다. 접착 내구성의 관점으로부터 비중, 강도, 수축팽창률의 차가 큰 수종과의 혼용은 피하는 것이 좋다. 구조용집성재의 품질유지를 위해서는 균, 벌레에 의한 생물 열화와 이 밖의 원인에 의해 발생하는 비생물에 의한 열화를 파악하고 있어야 한다.
조재성(Jae Sung Cho),김재욱(Jae Wook Kim),김세광(Sei Kwang Kim),김석영(Suk Young Kim),김인규(In Kyu Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.3
Objective: The purpose of this study was to evaluate the clinical course of discordant fetal growth and perinatal outcome in relation to dichorionic and monochorionic twin for different degrees of birth weight difference. Methods: Between Jan. 1992 and Dec, 1997, 154 twin pairs were born at Yonsei medical center and there were 36 pairs of twins which had 20% or more birth weight difference. The placental examination were performed routinely on all multiple births and 13 pairs of dichorionic twins and 23 pairs of monochorionic twins were consisted of the study population. These twin pairs were divided into three groups based on birth weight difference: 20-29%(as group A), 30-39%(as group B), and 40% or more(as group C). Gestational age, birth weight, gender and perinatal outcomes were observed for each twin pairs. Results: The perinatal death in the monochorionic twin pairs showed 9(34.6%) as group A, 4(50%) as group B, and 5(41,7%) as group C and in the dichorionic twin paus 1(10.0%) as youp A, 0 as group B and 5(62.5%) as group C. Up to 40% of birth weight difference, dichorionic twin pairs showed good perinatal outcomes compared with monochorionic twin pairs but over 40% or more of birth weight diffaence, however there were no significant difference of perinatal outcomes by chorionicity. In the monochorionic twin pairs, the cause of perinatal death showed 3 cases of prematurity, 2 cases of congenital anomalies and 2 cases of IIOC and 2 cases of cord lesions in group A whenas in the group B and C 3 cases of prematurity and 6 cases of congenital anomalies. In the dichorionic twin pairs, different-sex twin pairs showed no perinatal death in all three groups but in same-sex twin pairs there were 6 perinatal deaths. Conclusion: More recent improved fetal ultrasonographic surveillance such as determination of chorionicity, identification of fetal sex and evaluation of fetal anomalies help to make a clinical decision in growth discordant twin up to 40% of weight difference each other.
조재성 ( Cho Jae-sung ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
구조용집성재(glued laminated timber)는 lamina라고 불리는 element를 섬유방향이 일치되도록 길이, 폭, 두께 방향으로 집성, 접착하여 제조한 목질재료이며, 사용 목적에 따라 다양한 형태와 크기로 제조한 건축 재료다. 수종에 따라 접착 특성에 차가 있으므로 사용하는 접착제에 따라 선정할 필요가 있다. 접착 내구성의 관점으로부터 비중, 강도, 수축팽창률의 차가 큰 수종과의 혼용은 피하는 것이 좋다. 구조용집성재의 품질유지를 위해서는 균, 벌레에 의한 생물 열화와 이 밖의 원인에 의해 발생하는 비생물에 의한 열화를 파악하고 있어야 한다.
임신중기 양수천자 2,000 예에 대한 임상 및 세포유전학적 연구
조재성(Jae Sung Cho),박용원(Yong Won Park),김세광(Sei Kwang Kim),김인규(In Kyu Kim),양영호(Young Ho Yang),권혜경(Hye Kyung Kwon),이윤호(Yoon Ho Lee) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.1
Objective: To systematic analyze the change of indications, age distribution of the patients and chromosomal results according to patient's age and indications in midtrimester genetic amniocentesis Methods: This study reviewed 2,000 genetic amniocentesis cases from 1984 to 1997 which were done at Severance Hospital, after prenatal genetic counseling for the mothers who have high risk for carrying chromosomally abnormal babies. We analized the change of the indication, age distribution and chromosomal results according to maternal age and indications of amniocentesis Results: 1. The incidence of amniocentesis had been in gradual increase since the 1980's, and from the mid 1990's it showed an abrupt increment. 2. Of the 2,000 amniocentesis cases, 31.8% was maternal age 35 to 39 which was most common age group and followed by age 30 to 34 was 28.4% and age 25 to 29 was 27.4. 3. The indications for amniocentesis were advanced maternal age(39.6%), abnormal maternal serum markers(27.8%) and abnormal ultrasonographic findings which implies chromosomal abnormality(6.4%). Recently maternal serum markers and ultrasonography play an important role as an indicator for the amniocentesis. 4. From the 2000cases, 1,950 cases showed normal diploidy and 50 cases abnormal karyotype which consisted 2.5%. In autosomal disorders ll Down syndrome, 7 Edward syndrome, 1 Patau syndrome, 15 Translocation, 3 Mosaicism were diagnosed. In sex chromosomal disorders 3 Klinefelter syndmme, 2 Turner syndrome and other 8 chromosomal abnormalities were diagnosed. No statistic significance was found among different age groups. Those who had abnormal ultrasonographic findings implying chromosomal abnormality were found to have correlation with chromosomal abnormality than other indications Conclusion: Midtrimester genetic amniocentesis is an important diagnostic tool in prenatal diagnosis, of which the annual incidence has been recently increased abruptly. Not only maternal age, but the maternal serum markers and ultrasonograms should be considered in prenatal counseling, The genetic amniocentesis should be well informed to the general population.