INS/TRN 약결합 방식에서의 TRN 입력오차 보상 방안

박병수(ByungSu Park1),성창기(ChangKy Sung),남성호(SungHo Nam),이상우(SangWoo Lee) 한국항공우주학회 2018 한국항공우주학회 학술발표회 논문집 Vol.2018 No.11

Dietary protease improves growth performance, nutrient digestibility, and intestinal morphology of weaned pigs

( Sangwoo Park ),( Jeong Jae Lee ),( Boung Mo Yang ),( Jin Ho Cho ),( Soyun Kim ),( Joowon Kang ),( Sejong Oh ),( Dong-jun Park ),( Rider Perez-maldonado ),( Jee-yeon Cho ),( Il-hun Park ),( Hyeun Bum 한국축산학회 2020 한국축산학회지 Vol.62 No.1

This study was conducted to evaluate effects of dietary protease (PR) on growth performance, nutrient digestibility, and intestinal morphology of weaned pigs. A total of 75 weaned pigs [7.06 ± 0.18 kg of average body weight (BW); 28 day old] were randomly allotted to 3 dietary treatments in a randomized complete block design (blocks = BW and sex): a diet based on corn and soybean meal to meet the requirement of crude protein (CP) as a positive control (PC; CP = 24.49%), a low protein diet as a negative control (NC; CP = 22.51%), and NC + 0.02% PR. The PR used in this study was a commercial product containing 75,000 protease units/g derived from Nocardiopsis prasina produced in Bacillus licheniformis. Pigs were fed the dietary treatments for 6 weeks and the diets containing 0.2% chromic oxide for the last week of this study. Blood, feces, ileal digesta, and ileum samples were collected from randomly selected two pigs in each pen on respective time points. Measurements were growth performance, apparent ileal digestibility (AID) and apparent total tract digestibility (ATTD) of dry matter (DM), CP, and energy, frequency of diarrhea, packed cell volume (PCV), and ileal morphology of weaned pigs. Pigs fed PC and PR had higher (p < 0.05) final BW, average daily gain (ADG), and gain to feed ratio (G:F) during overall experimental period than those fed NC. Pigs fed PC and PR had higher (p < 0.05) AID or ATTD of DM, CP, or energy than those fed NC. Moreover, pigs fed PR had higher ratio between villus height and crypt depth (p < 0.05) and number of goblet cells (p < 0.05) than those fed NC. Addition of PR decreased (p < 0.05) frequency of diarrhea for the first two weeks after weaning compared with PC and NC. In addition, pigs fed PR had lower (p < 0.05) PCV on d 14 after weaning than those fed PC and NC. In conclusion, addition of PR in nursery diets with a low protein level significantly improved growth performance, nutrient digestibility, and intestinal morphology of weaned pigs

Percutaneous Coronary Intervention Versus Coronary Artery Bypass Grafting for Revascularization of Left Main Coronary Artery Disease

Sangwoo Park,Seung-Jung Park,Duk-Woo Park 대한심장학회 2023 Korean Circulation Journal Vol.53 No.3

Owing to a large-jeopardized myocardium, left main coronary artery disease (LMCAD) represents the substantial high-risk anatomical subset of obstructive coronary artery disease. For several decades, coronary artery bypass grafting (CABG) has been the “gold standard” treatment for LMCAD. Along with advances in CABG, percutaneous coronary intervention (PCI) has also dramatically evolved over time in conjunction with advances in the stent or device technology, adjunct pharmacotherapy, accumulated experiences, and practice changes, establishing its position as a safe, reasonable treatment option for such a complex disease. Until recently, several randomized clinical trials, meta-analyses, and observational registries comparing PCI and CABG for LMCAD have shown comparable long-term survival with tradeoffs between early and late risk-benefit of each treatment. Despite this, there are still several unmet issues for revascularization strategy and management for LMCAD. This review article summarized updated knowledge on evolution and clinical evidence on the treatment of LMCAD, with a focus on the comparison of state-of-the-art PCI with CABG.

과학사와 융합인재교육의 적용 실태와 과학사를 활용한 설계 기반의 융합인재교육 수업에 대한 초등교사들의 인식

박상우 ( Sangwoo Park ),정원우 ( Wonwoo Chung ),박영관 ( Youngkwan Park ) 경북대학교 과학교육연구소 2016 科學敎育硏究誌 Vol.40 No.2

이 연구는 과학 수업에서 과학사와 융합인재교육의 활용 실태와 과학사를 활용한 설계 기반의 융합인재교육 수업에 대한 초등교사들의 인식을 분석하는 것이다. 따라서 초등학교 과학 수업에서 과학사와 융합인재교육의 활용 실태와 과학사를 활용한 설계 기반의 융합인재교육 수업에 대한 교육적 가치를 알아보기 위해 설문지는 Shin & Han(2011)과 Lee & Shin(2014)의 연구와 Park et al.(2010)의 연구를 바탕으로 연구문제에 맞게 수정하여 총 20문항의 설문지를 개발하였다. 개발한 설문지는 D시와 G시 지역에 재직하고 있는 201명의 초등교사를 대상으로 설문을 실시하여 그 결과를 분석하였다. 이 연구의 결과 초등교사들은 과학 수업에서 과학사를 적극적으로 다루지 않으며, 주로 학생들에게 간단히 소개하면서 스스로 읽어보게 하였다. 초등교사들은 ‘충분하지 않은 시간’을 이유로 융합인재교육을 적극적으로 다루고 있지 않으며, ‘창의적 문제해결력’ 에 지도 중점을 두고 있지만 이 단계를 매우 지도하기 어려워하고 있었다. 또한 초등교사은 과학사를 활용한 설계 기반의 융합인재교육 수업의 교육적 가치에 대해서 매우 긍정적으로 인식하고 있었다. 특히 과학적 원리와 과거 과학자의 문제해결의 사례를 통해 학생들에게 창의적 설계와 문제해결의 아이디어와 실마리를 제공해 줄 수 있다고 인식하였다. 결론적으로 융합인재교육이 초등학교 현장에서 성공적으로 적용되기 위해서는 이와같은 초등교사들의 과학사와 융합인재교육의 활용실태에 대한 인식과 과학사를 활용한 설계 기반의 융합인재교육 수업의 교육적 가치에 대한 긍정적인 인식을 바탕으로 향후 보다 구체적인 과학사를 활용한 설계 기반의 융합인재교육 프로그램을 개발하고 적용하여 학교 현장에 보급할 필요가 있겠다. The purpose of this study was to analyze the utilization of history of science and STEAM and the elementary school teachers’ perceptions about design-based STEAM instruction applying the history of science in science class. To research the utilization of the history of science and STEAM in elementary science class, educational value of design-based STEAM instruction applying the history of science, the questionnaire was revised based on research conducted by Lee & Shin(2014), Park et al.(2010), Shin & Han(2011) and developed questionnaire a total of 20 questions. It was administered to reply the questionnaire to 201 teachers of elementary school in D and G area. The results of this study were as follows: elementary school teachers did not teach actively the history of science, made it read students by simply introducing himself. They did not teach actively STEAM due to not enough time(busy to take a magnitude). They were difficult to teach, but the most focused on the ‘Creative Problem-solving’ process. And elementary school teachers perceived positively about the educational value of design-based STEAM instruction applying the history of science. Especially, they perceived that it can help elementary school students find a hint for solving the problem through examples of cases of scientific principles and a scientist. In conclusion, it implicates that it is need to regard elementary school teachers’ perceptions on application of the history of science and STEAM, and develop specific design-based STEAM program applying the history of science in order to be applied successfully in elementary school for the STEAM settlement.

2009 개정 초등 과학교과서의 과학사 도입 내용과 과학의 본성 분석

박상우 ( Sangwoo Park ),정원우 ( Wonwoo Chung ),박경미 ( Kyungmi Park ) 경북대학교 과학교육연구소 2015 科學敎育硏究誌 Vol.39 No.2

본 연구의 목적은 2009 개정 초등 과학교과서의 과학사 도입 내용과 이에 반영된 과학의 본성 요소를 분석하는 것이다. 분석을 위해 우선 2009 개정초등 과학교과서 8종을 새롭게 도입된 학년군과 내용 영역에 따라 과학사의 도입 자료와 제시형태를 도출하고 보다 체계적이고 심층적인 분석을 위해 과학사와 관련된 내용을 박세기, 이기영, 이면우(2011)가 개발한 3차원 조합 분석틀을 이용하여 과학사의 도입 내용을 분석하고, Leite(2002)가 개발하고 최윤희(2005)와 정고은(2013)이 수정한 분석틀을 보완하여 과학의 본성 요소를 분석하였다. 이연구의 분석 결과는 다음과 같다. 첫째, 2009 개정초등 과학교과서에 제시된 과학사 자료는 총 26개로 학년군 및 내용 영역별로 자료의 분포가 고르지않았다. 둘째, 전체 48개의 3차원 조합 유형 가운데에서 오직 13개 유형만 사용되고 있어 특정 유형에 편중하여 과학사를 도입하고 있었다. 셋째, 과학사 자료에 반영된 과학의 본성 요소가 학년 및 영역별로 고르게 분포되지 않았다. 결론적으로 과학사를 통해 과학의 본성을 이해하고 과학적 소양을 함양하기 위해서는 2009 개정 초등 과학교과서에서의 학년군과 내용 영역을 고려하여 다양한 유형의 과학사 자료를 도입해야 하고, 과학의 본성 요소를 적절히 반영하도록 교과서 도입에 있어 보다 다차원적인 접근이 이루어져야 할 것이다. The purpose of this study was to analyze the introduced contents and the nature of science on the history of science in elementary school science textbooks according to the 2009 revised curriculum. For this purpose, first of all, the frequency of contents of history of science in 8 kinds of science textbooks in elementary school is analyzed by grade cluster and content part. Analysis framework for analyzing the introduced contents on the history of science was characterized with three-dimensional combination of the context, the role and the types(Park, Lee, & Lee, 2011). Analysis framework for the nature of science on the history of science was developed by Leite(2002) and revised by Choi (2005) and Kim(2010) and complemented under one expert in science education. The results of this study are as follows: First, the frequency of contents of history of science in textbook is 26 and it were not equally distributed into science textbooks in elementary school as a result of the analysis by grade cluster and content part. Second, with three-dimensional combination framework only 13 kinds were used in all 48 different types through analyzing the textbooks. It implies that ways of introducing contents of history of science into textbooks were limited to certain types. Third, the nature elements of science were not equally distributed on the history of science in elementary school science textbooks. In conclusion, in order to understand the nature of science through the history of science and to foster scientific literacy ultimately, it implicates that it is need to present various kinds of the history of science for one theme in consideration about the grade cluster and content part. Also more multilateral approach is need to introduce equally distributed into textbooks to reflect the elements of the nature of science.

MOSSE 필터를 이용한 이중 색상 필터 조리개 카메라 영상의 심도 추정 방법

박세인(Sein Park),박진호(Jinho Park),박하실(Hasil Park),박상우(Sangwoo Park),임재승(Jaeseung Lim),백준기(Joonki Paik) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.11

Relative constructability and thermal performance of cast-in-place concrete energy pile: Coil-type GHEX (ground heat exchanger)

Park, Sangwoo,Lee, Dongseop,Choi, Hyun-Jun,Jung, Kyoungsik,Choi, Hangseok Elsevier 2015 ENERGY Vol.81 No.-

<P><B>Abstract</B></P> <P>Energy piles encase heat exchange pipes in a pile foundation to use geothermal energy. This paper evaluates the constructability and thermal performance of energy piles equipped in a large-diameter drilled shaft. Two energy piles were constructed by fabricating coil-type heat exchange pipes in cast-in-place concrete piles. The coil pitch was designed to be 200 mm and 500 mm, respectively. The constructability of each energy pile was evaluated in terms of time and ease for installing. In-situ TRTs were performed to compare the thermal performance of energy piles. The relative heat exchange efficiency for the coil pitch 200 mm is only 1.2 times greater than that of the coil pitch 500 mm energy pile, even though the coil pitch 200 mm energy pile encases the heat exchange pipe 2.4 times as longer as the coil pitch 500 mm. In addition, the result of TRTs was compared with two well-known analytical to estimate thermal properties of ground formation. A thermal performance test was carried out by applying artificial cooling operation to the energy piles, and indicates the heat exchange rate is not directly proportional to the pipe length because the tighter coil pitch configuration may cause thermal interference between the coil loops.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Two large-diameter cast-in-place energy piles set with coil-type heat exchange pipes. </LI> <LI> TRTs and thermal performance tests to study effect of coil pitch configuration. </LI> <LI> The longer heat exchange pipe, the more heat exchange rate. </LI> <LI> Heat exchange rate is not directly proportional to encased pipe length. </LI> <LI> Tighter coil pitch configuration causes thermal interference between coil loops. </LI> </UL> </P>

Study on the Changes in Enzyme and Insulin-like Growth Factor-1 Concentrations in Blood Serum and Growth Characteristics of Velvet Antler during the Antler Growth Period in Sika Deer (Cervus nippon)

Park, Jaehyun,Jeon, Byongtae,Kang, Sungki,Oh, Mirae,Kim, Myonghwa,Jang, Seyoung,Park, Pyojam,Kim, Sangwoo,Moon, Sangho Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.9

This study was conducted to investigate changes in blood enzyme parameters and to evaluate the relationship between insulin-like growth factor-1 (IGF-1), antler growth and body weight during the antler growth of sika deer (Cervus nippon). Serum enzyme activity and IGF-1 concentrations were measured in blood samples collected from the jugular and femoral veins at regular intervals during the antler growth period. Blood samples were taken in the morning from fasted stags (n = 12) which were healthy and showed no clinical signs of disease. Alfalfa was available ad libitum and concentrates were given at 1% of body weight to all stags. The experimental diet was provided at 9 am with water available at all times. There were no significant differences in alkaline phosphatase, aspartate aminotransferase, and alanine aminotransferase during antler growth, but alkaline phosphatase concentrations increased with antler growth progression, and the highest alkaline phosphatase concentration was obtained 55 days after antler casting. Serum IGF-1 concentrations measured from blood samples taken from the jugular vein during antler growth, determined that levels of IGF-1 was associated with body weight and antler growth patterns. Serum IGF-1 concentrations were higher at the antler cutting date than other sampling dates. Antler length increased significantly during antler growth (p<0.001), and there was a similar trend to between right and left beams. Body weight increased with antler growth but was not significant. Consequently it appeared that serum alkaline phosphatase concentration was related to antler growth and both antler growth and body weight were associated positively with IGF-1 concentrations during antler growth.

Partition-based Hybrid Decoding (PHD)

Park Sangwoo(박상우),Zhang Yalei(장얄레이),Song Iickho(송익호),Seong Ro Lee(이성로) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.06

Om3 test of ΛCDM with eBOSS data

Sangwoo Park,Arman Shafieloo,Varun Sahni,Alexei A. Starobinsky 한국천문학회 2023 天文學會報 Vol.48 No.1