불완전 동적 데이터로부터 복합신소재로 보강된 교량의 함수기반 역해석에 의한 성능 평가

이상열,노명현,Lee, Sang-Youl,Noh, Myung-Hyun 한국복합신소재구조학회 2010 복합신소재구조학회논문집 Vol.1 No.2

This work examines the identification of stiffness reduction in damaged reinforced concrete bridges under moving loads, and carries out the performance assessment after repairing using advanced composite materials. In particular, the change of stiffness in each element before and after repairing, based on the Microgenetic algorithm as an advanced inverse analysis, is described and discussed by using a modified bivariate Gaussian distribution function. The proposed method in the study is more feasible than the conventional element-based method from computation efficiency point of view. The validity of the technique is numerically verified using a set of dynamic data obtained from a simulation of the actual bridge modeled with a three-dimensional solid element. The numerical examples show that the proposed technique is a feasible and practical method which can inspect the complex distribution of deteriorated stiffness although there is a difference between actual bridge and numerical model as well as uncertain noise occurred in the measured data. 본 연구는 차량 이동하중을 받는 손상된 콘크리트 슬래브교량의 강성저하를 규명하고, 복합신소재를 사용하여 보강 후 성능평가를 수행한다. 특히 마이크로 유전알고리즘에 의한 역해석에 기반하여 보강 전 후 각 요소에서의 강성변화를 수정된 2차변수 Gaussian 분포함수를 사용하여 정식화하였다. 본 연구에서 제안한 방법은 기존의 요소기반 접근 방식에 비하여 수치해석적인 관점에서 효율성을 갖는다. 개발한 알고리즘은 3차원 솔리드 요소를 사용하여 모델링한 교량의 동적 거동 시뮬레이션으로부터 계측한 데이터를 사전정보로 사용하여 검증하였다. 몇 가지 수치예제는 본 연구에서 개발한 방법이 실제교량과 수치모델간의 차이로 인한 오차 및 노이즈 등으로 인한 동적 계측치 오류 등이 고려되었음에도 강성분포 추정 및 성능 평가를 효율적으로 수행함을 보여준다.

우리나라 의료의 생의학적 모델 어떻게 할 것인가? - 생의학적 모델에서 생물정신사회적 모델로 -

이상열,Lee, Sang-Yeol 한국정신신체의학회 2012 정신신체의학 Vol.20 No.1

질병의 생물정신사회적 이해는 건강의 의미 있는 증진을 위해서 매우 중요한다. 건강의 유지와 증진은 신체적, 정신적, 사회적, 그리고 영적인 안녕감을 통하여 이루어진다. 건강은 단순한 상태와 삶의 목적이 아니며, 일상생활에서의 자원으로, 개인적, 사회적뿐만 아니라 신체적 능력의 긍정적 개념이다. 한편 의료 체계에서 생물정신사회적 모델의 이해 역시 매우 중요하다. Engel은 의사들의 교육 및 진료에서 생의학적 접근을 비판하고, 새로운 모델인 생물정신사회적 모델을 주장하였다. Engel은 인간을 특정한 방법으로 자신의 건강을 위해하거나 증진시킬 수 있는 생물학적, 정신적, 사회적 존재로 보았다. 질병의 생물정신사회적 모델의 중요함에도 불구하고, 우리나라의 의료는 질병의 생의학적 모델에만 중점을 두고 있다. 그 결과 한국의 의료가 기계화 되어가고 있고 비인간화 되어가고 있다. 저자는 한국 정신신체의학회 창립 20주년을 맞이함에 따라 우리나라 의료 체계 및 실제적인 임상 진료에서 질병의 생물정신사회적 모델의 중요성을 강조하고자 하였다. Understanding the biopsychosocial model of illness is crucial for any meaningful advance of health. The maintenance and promotion of health is achieved by different combinations of physical, mental, social and spiritual well-being. Health is not an objective of living. It is not only a state, but also a resource for everyday life. Health is a positive concept that emphasizes personal and social resources, as well as physical capacities. Understanding the biopsychosocial model of health and disease is very important in the medical system. George Engel challenged the medical profession to reconsider a strict biomedical approach to medical education and care, and to embrace a "new medical model," the biopsychosocial model. He argued that humans are at once biological, psychological, and social beings who behave in certain ways that can promote or harm their health. Although understanding the biopsychosocial model of illness is important, Korea's medical system have mainly been focusing on the biomedical model of illness. I would like to highlight the importance of biopsychosocial model of illness for Korea's medical system and real clinical field according to the 20th anniversary of Korean Society of Psychosomatic Medicine.

기능성 상부 위장관 증상을 호소하는 환자의 스트레스, 불안 및 우울

이상열,신성훈,최석채,Lee, Sang-Yeol,Shean, Sung-Hun,Choi, Suk-Chei 한국정신신체의학회 1998 정신신체의학 Vol.6 No.1

Objective : The sensation of dysphagia, heartburn, globus hystericus, and functional dyspepsia are common symptoms of the functional upper gut disorders. This study was designed to investigate quantity of perceived stress, depression, and anxiety in the patients with functional upper gut symptoms whose esopahgeal manometry(EM) and gatroesophageal reflux (GERT) test were normal. Methods : A total of 38 patients who complained of the symptoms had been tested with 24-hour ambulatory EM and conventional GERT in our gastrointestinal clinic. Thirty patients whose tests had been normal(patients group) were assessed with Symptom Checklist-90-Revision(SCL-90-R), Beck Depression Inventory(BDI), and Spielberger Stait-Trait Anxiety Inventory(STAI) and compared with 30 patients(control group) without functional upper gut symtpoms in the hepatobiliary clinic. The two groups were also assessed by quantity of perceived stress during the last year through self-report. Results: 1) These patients tended to be predominently female, older, and possessed a lower education than control group. 79% of 38 patients who had been tested were normal. 2) Compared to the control group, the patients had significantly higher mean scores on four subscales(somatization, depression, anxiety, and positive symptom distress index). 3) The patient group had significantly more perceived stress than the control group. 4) The patients group had significantly higher levels of depression than the control gorup, but there was not any significant difference in the STAI. 5) There were significant positive correlations between the BDI score and the STAI-trait, the STAI-stait and the STAI-trait, the quantity of perceived stress and the STAI-trait. Conlusion : The patients with functional upper gut symptoms displayed more, psychological distress, sornatization, anxiety, and deperssion. Among them, patients had higer depression than control group. Functional upper gut symtoms could be more appropriately viewed as somatic symptoms of depression. These findings suggest that such patients need to have psychiatric intervention and treatment.

The Effects The Type of Canes-Handle Affects in Recovering-Balance of Hemiplegic patients

이상열,이명희,박민철,한진태,권오현,배성수,Lee, Sang-Yeol,Lee, Myoung-Hee,Park, Min-Chull,Han, Jin-Tae,Kweon, Oh-Hyun,Bae, Sung-Soo The Korean Society of Physical Therapy 2008 대한물리치료학회지 Vol.20 No.4

Purpose: We compared T-type and I-type canes on postural balance in 28 hemiplegic patients. Methods: Subjects were allocated randomly into two groups: a T-shape cane group (n=14) and an I-shape cane group (n=14). Before the test, subjects were trained by a physical therapist to walk with a cane for 6 weeks. The Main Outcome Measures were measured as maximal sway velocity, sway path, sway area, and partial weight bearing using a Balance Performance Monitor (BPM) and ambulation velocity using a 'Timed up and go test'. We also measured the maximal ambulation velocity. Results: The distribution of weight bearing on the affected side without the cane was 35% in the I-shape cane group and 36% in the T-shape cane group. After training, weight bearing on the affected side increased by 45% in the I-shape cane group and 40% in the T-shape cane group. With the cane held in the hand, weight bearing on the affected side in the T-shape cane group decreased by 3%. Conclusion: The I-shaped cane increased static standing balance, including hemiplegic side weight bearing. Therefore, I-shape canes can improve the balance of hemiplegic patients.

EGR PREDICTION OF DIESEL ENGINES IN STEADY-STATE CONDITIONS USING DEEP LEARNING METHOD

이상열,Yongjoo Lee,Youngbok Lee,Minjae Kim,신승협,Jihwan Park,Kyoungdoug Min 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.3

Most of the parameters needed to predict Nitrogen Oxides (NOx) emissions, for example, combustion temperature, oxygen concentration and in-cylinder composition ratio, can be predicted by phenomenological 0-D prediction model if accurate EGR rates are provided. However, it is difficult to predict the EGR rate itself accurately by the model, so the EGR rate is predicted by the temperature measurement method. Although this method predicts EGR rates very accurately and quickly, there are some problems such as thermocouple failures and the difficulty in applying to mass production engines, so it is necessary to predict EGR rates by another method. The deep learning method follows an inductive methodology that extracts common characteristics of data based on a lot of data themselves. Therefore, although it requires a lot of experimental data, it has an advantage of high accuracy that can be obtained without any feature engineering. In this study, the EGR rate, which was difficult to predict in the past, was predicted by making various models using the deep learning method. Finally, EGR rate was predicted with a high accuracy of R-square 0.9994 and root mean squared error 0.0692 using a deep learning method at 1500 rpm and bmep 4, 6 and 8 bar. This study can be used as a basic study to predict EGR rates in transient and RDE conditions.

직교이방성 구형 판의 좌굴 해석 (II) -고정단과 단순지지 단을 갖는 경우-

이상열,정우영,장석윤,Lee, Sang-Youl,Jung, Woo-Young,Chang, Suk-Yoon 한국복합신소재구조학회 2014 복합신소재학회논문집 Vol.5 No.2

$Cd_{1-x}Zn_{x}S$ 박막의 성장과 광전도 특성

이상열,홍광준,유상하,신용진,이관교,서상석,김혜숙,윤은희,김승욱,박향숙,신영진,정태수,신현길,김태성,문종대,이충일,전승룡,Lee, S.Y.,Hong, K.J.,You, S.H.,Shin, Y.J.,Lee, K.K.,Suh, S.S.,Kim, H.S.,Yun, E.H.,Kim, S.U.,Park, H.S.,Shin, Y.J.,Jeong, T.S.,Shin, 한국센서학회 1995 센서학회지 Vol.4 No.3

Chemical bath deposition(C.B.D.)방법으로 다결정 $Cd_{1-x}Zn_{x}S$ 박막을 스라이드 유리(coming-2948) 기판위에 성장시켜 열처리하고 X-선 회절무늬를 측정하여 결정구조를 밝혔다. $550^{\circ}C$로 $N_{2}$ 속에서 열처리한 시료의 X-선 회절무늬로부터 외삽법으로 구한 격자상수는 CdS인 경우 $a_{0}\;=\;4.1364{\AA}$, $c_{0}\;=\;6.7129{\AA}$였으며 ZnS인 경우는 $a_{0}\;=\;3.8062{\AA}$, $c_{0}\;=\;6.2681{\AA}$였다. Van der Pauw 방법으로 Hall 효과를 측정하여 운반자 농도와 이동도의 온도 의존성을 연구하였다. 광전도 셀의 특성으로 스펙트럼응답 감도, 최대허용소비전력 및 응답시간을 측정하였다. Polycrystalline $Cd_{1-x}Zn_{x}S$ thin film were grown on slide glass(corning-2948) substrate using a chemical bath deposition (C.B.D) method. They were annealed at various temperature and X -ray diffraction patterns were measured by X-ray diffractometor in order to study $Cd_{1-x}Zn_{x}S$ polycrystal structure using extrapolation method of X-ray diffraction patterns for the CdS, ZnS sample annealed in $N_{2}$ gas at $550^{\circ}C$. It was found hexagonal structure which had the lattice constant $a_{0}\;=\;4.1364{\AA}$, $c_{0}\;=\;6.7129{\AA}$ in CdS and $a_{0}\;=\;3.8062{\AA}$, $c_{0}\;=\;6.2681{\AA}$ in ZnS, respectively. Hall effect on these sample was measured by Van der Pauw method and then studied on carrier density and mobility depending on temperature. We measured also spectral response, sensitivity maximum allowable power dissipation and response time on these sample.

한국의 동물물리치료 제도의 필요성과 도입 방법 제언

이상열,Lee, Sang-Yeol 대한물리치료과학회 2015 대한물리치료과학회지 Vol.22 No.1

Purpose : The purpose of this study is to introduce the necessity of introduction and to proposal the methods of introduce for animal physical therapy in Korea. Method : This study is a literature study with books, article and the information through every route for introduction of animal physical therapy in Korea. Results : Animal physical therapy should be introduced to Korea with global trend. For this, it should be need academic exchanges of veterinary and physiotherapy. And there is an urgent need for an educational framework and an institutional framework. And physiotherapist requires preparation and understanding of the animal anatomy. Conclusion : There is an urgent need for an animal physical therapy to welfare and medical benefit of Korean animal companion. The physiotherapist should be prepare educational framework, institutional framework and clinical strategy.

보험회사의 방재활동-국제화재해상 보험주식회사

이상열,Lee, Sang-Yeol 한국화재보험협회 1976 防災와 保險 Vol.5 No.-

Boron Nitride 의 유기금속 화학증착에서의 반응속도론

이상열,이중기,남영우,박달근 ( Sang Yeol Lee,Joong Kee Lee,Young Woo Nam,Dal Keun Park ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.2