외부장비에 의한 손상배관의 손상유형 및 잔류강도

김영표,백종현,김철만,김우식,Kim, Young Pyo,Baek, Jong Hyun,Kim, Cheol Man,Kim, Woo Sik 한국압력기기공학회 2009 한국압력기기공학회 논문집 Vol.5 No.2

The dominant incidents category for onshore and offshore natural gas transmission pipelines in the world is associated with outside forces. Incidents in the outside forces category embrace acts of nature, which typically cause widespread structural damage, as well as act of man, whose effects tend to cause dents and/or gouges localized at point of contact that are referred to as mechanical damage. Therefore, these damage types must be better addressed to avoid unnecessary and costly repairs and the possibility of catastrophic events. First of all, the characterizing features of mechanical damage in gas pipelines were evaluated by using of excavator or boring machine. There is no reliable method for evaluating the safe operating pressure of pipeline affected by mechanical damage. It is especially important to evaluate the remaining strength of damaged pipelines due to outside force. Therefore, the full scale burst tests were conducted to evaluate the remaining strength of pipe with mechanical damage that combines a dent and a gouge. This paper is supposed to provide information that will assist in developing a criterion to assess serviceability in pipelines with mechanical damage.

전파정류방식의 고전압발생장치를 이용한 X선 기기의 특성 평가

김영표,김태곤,이호식,박용필,천민우,Kim, Young-Pyo,Kim, Tae-Gon,Lee, Ho-Shik,Park, Yong-Pil,Cheon, Min-Woo 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.6

X-ray system which is usefully used in diagnosis of the patient, being bombed of radioactivity is a big weak point when irradiates a X-ray to the human body so that ICRP restricted the radiation exposure tolerance of the human body. In order to reduce being bombed, the many research and development is now advanced. A lots of diagnostic X-ray machines have currently used due to the increase of occurrence efficiency of X-ray and precisely the output control by using the inverter which is a high speed switching semiconductors. For getting the confidence of the X-ray machine, the same radiation occurrence, same evaluation, and same irradiation condition are necessary when evaluates X-ray irradiation. It is the most important part for the accuracy of the test result and the patient safety. This research has produced the high voltage occurrence system of full-wave rectification method by using the LC resonance inverter, and evaluated the irradiation reproducibility in order to use it in diagnosis of the patient.

인버터방식의 고전압 발생장치를 이용한 의료용 X선 기기의 특성평가

김영표,천민우,박용필,Kim, Young-Pyo,Cheon, Min-Woo,Park, Yong-Pil 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1

Medical X-ray has been brought many changes according to the rapid development of high technology. Especially, for high-voltage generator which is the most important in X-ray generation the traditional way is to use high-voltage electric transformers primarily. However, since it is large and heavy and the ripple rate of DC high-voltage applied to X-ray tube is too big, it has a disadvantage of low X-ray production efficiency. To solve these problems, the studies about high-voltage power supply are now proceeding. At present, the high-voltage generator that generates high-voltage by making high frequency using inverter control circuit consisting of semiconductor device is mainly used. High-voltage generator using inverter has advantages in the diagnosis using X-ray including high performance with short-term use, miniaturization of power supply and ripple reduction. In this study, the X-ray high-voltage device with inverter type using pulse width modulation scheme to the control of tube voltage and tube current was designed and produced. For performance evaluation of produced device, the control signal analysis, irradiation dose change and beam quality depending on the load variation of tube voltage and tube current were evaluated.

수학적 보드게임이 경도 발달장애 성인의 연산 능력 및 수학적 성향에 미치는 효과

김영표(Kim Young Pyo),강종구(Kang Jong Gu) 한국장애인재활협회 2015 재활복지 Vol.19 No.4

이 연구에서는 장애성인에 대한 평생교육의 일환으로서 수학적 보드게임이 경도발달장애 성인의 연산 능력 및 수학적 성향에 어떠한 영향을 미치는지 알아보고자 하였다. 이를 위해 경도발달장애 성인 5명(지적장애 성인 4명, 자폐성장애 성인 1명)을 대상으로 수학적 보드게임을 사용한활동 프로그램을 실시하였다. 연구 결과는 다음과 같았다. 첫째, 보드게임이 경도발달장애 성인들의 연산 능력에 미치는 영향과 관련하여 참여자들의 연산 능력은 향상되었으며, 이러한 결과는 통계적으로도 유의하게 나타났다. 하지만 이러한 효과의 정도는 장애성인 개개인에 따라 상이하였다. 둘째, 보드게임이 경 도발달장애 성인들의 수학적 성향에 어떠한 영향을 미치는가와 관련하여 연구 참여자들의 수학적 성향이 통계적으로 유의하게 향상되지는 못하였다. 본 연구에서 나타난 결과들은 수학적 보드게임이 장애성인의 직업생활에 필요한 연산능력과 같은 수학적 능력을 향상시켜줄 수 있음을 보여주고 있다. 따라서 발달장애인들의 수학적 능력을 향상시키기 위해 보드게임의 효과 및 활용방안에 관한 후속연구가 요구된다. This study explored how mathematical board games, a kind of lifelong education, effect on computational ability and mathematical disposition of adults with developmental disabilities. For the purpose of this study, activities through mathematical board games were used towards adults with mild developmental disabilities(4 adults with intellectual disabilities and 1 adult with autism spectrum disorders). The result of this study is as follow: First, regarding how board games effect on computational ability on mild developmental disabilities, participants’ computational ability were improved and this result taook meaningful level in statistics. Second, regarding how board games effect on mathematical disposition on adults with mild developmental disabilities, participants’ mathematical disposition did not show meaningful level in statistics. The results of this study show that mathematical board games can improve mathematical abilities necessary for occupational living of adults with disabilities. Therefore, active usage methods of board games need to be prepared in order to improve mathematical abilities of people with developmental disabilities.

실제크기배관 피로시험을 통한 가스배관 손상부의 피로수명 평가

김영표(Young-pyo Kim),김철만(Chol-man Kim),김우식(Woo-sik Kim),고영태(Young-tai Kho) 한국가스학회 2002 한국가스학회 학술대회논문집 Vol.2002 No.5

장애학생의 수학적 문장제 문제해결에 관한 교수방법의 중재 효과: 메타 분석

김영표 ( Young Pyo Kim ),신현기 ( Hyun Ki Shin ) 한국특수교육문제연구소 2008 특수교육저널 : 이론과 실천 Vol.9 No.1

장애학생들의 수학적 문장제 문제해결력 습득과 향상이 매우 중요한 교육목표이므로, 이러한 목표를 이루기 위해 시도된 다양한 교수 방법의 유형을 알아보고 그 중에서 어떤 방법이 가장 효과적인가를 조사하기 위한 연구로서 장애학생들의 문장제 문제해결력 향상을 위해 1990년대 이후 2007년까지 이루어진 학위 논문들(63편)의 교수방법을 종합하고 그 효과를 분석하였다. 그 결과, 문장제 문제해결력 향상을 위해 국내 학위논문에서 사용된 교수방법은 모두 10가지의 하위유형으로 분류되었으며, 그 중에서 집단 실험을 실시한 연구들(20편)을 대상으로 메타분석을 한 결과 모든 교수방법들의 평균효과크기는 1.03이었으며, 이러한 효과 크기는 교수방법에 따라 차이가 있는 것으로 나타났고, 그 중에서도 자기교시 전략 교수가 가장 효과적인 것으로 드러났다. 이러한 연구결과는 문장제 문제해결에 대한 교수방법의 효과를 메타분석한 다른 연구들(Chen, Han-Wei, 2004; Kroesbergen & Van Luit, 2003; Xin & Jitendra, 1999)의 결과와 일치하는 것이다. Because aquisition and strengthening of mathematical word problem solving competence is very important educational objectives to students with disabilities as well as students without disabilities, Instructional methods of 63 theses for a degree(intervention studies) performed in Korea on mathematical word problem solving competence of student with disabilities were synthesized as the groundwork to know which method is most effective among various instructional methods to achieve this goal by meta-analysis. For satisfying this purpose, We got every theses for a degree(intervention studies) performed in Korea on mathematical word problem solving competence of student with disabilities via online search and analyzed their independent variables to know their instructional methods and selected all of group intervention(20) from them. then, We meta-analyzed their effect sizes. As a result, We classfied them ten subtypes[cognitive and metacognitive problem solving strategy instruction studies(20), self-instruction studies(15), representation technique instruction studies(6), Yun-Ok Kim(2001)``s Problem solving strategy instruction studies(6), Polya``s model instruction studies(5), CAI studies(4), SQ3R reading comprehension strategy studies(3), and other three subtypes(4)]. Mean effect size of three instructional methods(cognitive and metacognitive problem solving strategy instruction, self-instruction, and Polya``s problem solving model instruction) was 1.01. and Self-instructional methods are most powerful so as to strengthen mathematical problem solving ability of students with cognitive disorder. Therefore, It is necessary to perform more deeply involved research about how correlated characteristics of instructional methods are and how different their effects are by moderators for performing evidence-based intervention.

지구성훈련이 안정시 , 운동후 및 회복기에 나타나는 스트레스 호르몬 반응

김영표(Kim Young Pyo),윤진환(Yoon Jin Hwan),손흥기(Son Heung Ki) 한국사회체육학회 2000 한국사회체육학회지 Vol.14 No.-

The purpose of this study was to investigate plasma responses of adrenocorticotropin(ACTH), cortisol, epinephrine, and norepinephrine of endurance-trained athletes and untrained male to acute gradual maximal exercise. The subjects for this study were 10 endurance-trained athletes and 8 healthy male university students who participated in this experiment voluntarily. Each subjects performed to exhaustion gradual maximal exercise test on treadmill. Blood samples were collected at rest, immediately following exercise, and 30 min postexercise. The results of this study were as follows' Plasma ACTH, cortisol, epinephrine, and norepinephrine levels increased significantly from rest to immediately following the exercise, and decraesed significantly at 30 min postexencise in the endurance-trained and untrained groups. The cortisol were significantly higher level at immediately following exercise, however significantly lower level were epinephrine at immediately following exercise, and norepinephrine at immediately following exercise and 30 min postexercise in endurance-trained group than untrained group. These data show that acute gradual maximal exercise results in significant increases in plasma hormones. And endurance training may induce changes in hypothalamic-pituitary-adrenal axis (HPAaxis) hormone responses.

극한지 장거리 천연가스 배관의 운전조건 평가

김영표(Young-Pyo Kim),김호연(Ho-Yeon Kim),김우식(Woo-Sik Kim) 한국가스학회 2017 한국가스학회지 Vol.21 No.1

극한지 천연가스 배관의 운전온도 범위는 가스 공급을 최적화하고 운전동안 극한지 환경에 대한 충격을 최소화하기 위해 기본적으로 제어되어야 한다. 배관에 흐르는 가스의 온도는 Joule-Thomson 효과와 배관과 토양의 열전달에 의존한다. 따라서 본 연구에서는 매설 천연가스 배관의 열전달과 Joule-Thomson 효과를 상세히 고려하였다. 토양온도는 0 ~ -20 ℃, 총괄열전달계수는 0 ~ 5.5 W/㎡K로 가정하였다. 토양온도와 총괄열전달계수 변화에 따른 배관 길이방향의 가스온도 변화와 압력손실을 동시에 계산하였다. 또한, 본 연구에서는 HYSYS 프로그램을 사용하여 토양온도와 총괄열전달계수에 따른 상변화와 하이드레이트 생성을 예측하였다. The operating temperature range of the natural gas pipeline in Arctic environment would be controlled primarily to optimize gas throughput and to minimize the environmental impact resulting from operation of such pipelines. The temperature of the gas as it flows through the pipeline is a function of both the Joule-Thomson effect and the pipe to soil heat transfer. Therefore, the heat transfer and Joule-Thomson effect of the buried natural gas pipeline in this study were carefully considered. Soil temperatures and overall heat transfer coefficients were assumed to be 0 ~ -20 ℃ and 0 ~ 5.5 W/㎡K, respectively. The gas temperature and pressure calculations along a pipeline were performed simultaneously at different soil temperatures and overall heat transfer coefficients. Also, this study predicted the phase change and hydrate formation for different soil temperatures and overall heat transfer coefficients using HYSYS simulation package.

발달장애아동의 언어행동에 대한 국내 중재 연구의 양적 종합

김영표 ( Kim Young-pyo ),강종구 ( Kang Jong-gu ) 한국지적장애교육학회(구 한국정신지체아교육학회) 2021 지적장애연구 Vol.23 No.1

이 연구에서는 발달장애아동의 언어능력을 향상시키기 위한 언어행동 중재에 대한 연구현황을 양적으로 종합하고, 이러한 연구에 나타난 언어행동 중재의 전반적인 효과를 알아보고자 하였다. 이 연구의 목적을 위해 발달장애아동의 언어행동의 중재와 관련하여 18편의 국내발표 논문들을 분석하였다. 논문들에 대한 분석은 언어행동과 관련된 연구현황 및 중재 효과 크기(PND)에 대하여 다음과 같은 결과를 보여주었다. 첫째, 언어행동 중재에 대한 연구는 많지는 않지만 꾸준히 발표되어져 오고 있었으며, 연구대상에 있어서는 대체로 자폐성장애가 있는 남자 유아를 대상으로 중재가 가장 많이 이루어졌다. 또한 연구설계의 경우 중다기초선 설계를 중심으로 이루어지고 있었다. 검토대상 연구의 대부분은 신뢰도를 제시하였지만, 중재충실도 및 사회적 타당도에 대한 제시는 다소 부족하였다. 둘째, 중재의 PND와 관련하여 4가지 언어행동(종속변인) 가운데 맨드에 대한 교수방법이 가장 높은 PND를 나타내었으며, 그 다음으로 에코익, 인트라버벌, 택트의 순으로 효과를 나타내었다. 이러한 연구 결과는 언어행동 중재 연구가 보다 다양한 연령대의 다양한 유형의 장애아동을 대상으로 여러 언어 기능의 중재 효과가 연구되어야 하며 서로 다른 교수방법의 효과를 명확히 알 수 있도록 질 높은 연구가 이루어질 필요가 있음을 시사한다. In this study, we attempted to review quantitatively research of verbal behavioral intervention for improving the verbal expression ability of children with developmental disabilities. For the purpose of this study, 18 articles related to verbal behavior intervention on children with developmental disabilities were analyzed. The analysis of articles showed the following results on research status and effect size of intervention related to verbal behavior. First, regarding research status, the number of studies on verbal behavioral intervention was constantly being presented despite of the small number of publication, and As for the study subjects, the most frequent intervention was for male infants with autism spectrum disorders. In addition, regarding research design were mainly conducted by multi-baseline design. Most studies on the review presented reliability, but intervention fidelity and social validity were somewhat insufficient. Second, Regarding the PND of intervention, the teaching method for the Mand showed the highest PND among the four verbal behaviors (dependent variables), followed by the effects of Echoic, Intraverbal, and Tact. The results of these studies suggest that verbal behavior intervention studies should be performed about the intervention effects of various verbal behavior functions for various types of disabilities in various age groups, and more high-quality studies should be conducted to clearly understand the effects of different teaching methods.

육성용접을 사용한 가스배관 보수용접시 허용용접입열 예측 및 기계적특성 평가

김영표(Young-Pyo Kim),백종현(Jong-Hyun Baek),김우식(Woo-Sik Kim) 한국가스학회 1999 한국가스학회 학술대회논문집 Vol.1999 No.9