정상 반월상 연골의 혈관 분포

김상훈,조홍식,이한영,이기범,민병현,Kim Sang Hoon,Cho Hong Sik,Lee Han Young,Lee Ki-Bum,Min Byung-Hyun 대한관절경학회 2003 대한관절경학회지 Vol.7 No.1

Purpose : To evaluate the morphologic measurement and microvasculature of the normal human meniscus in Korean and to compare the difference of microvasculature according to the age and anatomical location. Materials and methods : Menisci of 21 cadavers divided into 3 groups according to the age. Each meniscus was divided into 10 parts of which the width and area of microvasculature were measured. Results : The average width of the medial and lateral menisci were $10.49{\pm}02.92mm$ and $10.55{\pm}2.05mm$, respectively. The average area of the microvasculature measured $20.29{\pm}8.44\%$ in the medial meniscus and $18.99{\pm}7.03\%$ in the lateral meniscus. The microvasculature of the medial meniscus was most abundant in the anterior horn and least abundant in the posterior horn (p<0.05). The lateral meniscus showed the most vessels in the posterior horn (p<0.05). The microvasculature of popliteal hiatus was not avascular but hypovascular. The area of microvasculature decreased with increasing age in all parts of the medial meniscus and body and posterior horn of the lateral meniscus (p<0.05). Conclusion : Differences in the anatomical distribution of the vessels were noted of both the medial and lateral menisci. The area of microvasculature generally decreased proportionally with increasing age in both medial and lateral meniscus.

슬관절 전치환술에서 후방 안정 임플란트의 오정렬이 경골 기둥에 미치는 영향

김상훈,안옥균,배대경,김윤혁,김경수,이순걸,Kim, Sang-Hoon,Ahn, Ok-Kyun,Bae, Dae-Kyung,Kim, Yoon-Hyuk,Kim, Kyung-Soo,Lee, Soon-Gul 대한의용생체공학회 2007 의공학회지 Vol.28 No.1

Recently, it has been reported that the posterior stabilized implant, which is clinically used for the total knee replacement (TKR), may have failure risk such as wear or fracture by the contact pressure and stress on the tibial post. The purpose of this study is to investigate the influence of the mal alignment of the posterior stabilized implant on the tibial post by estimating the distributions of contact pressure and von-Mises stress on a tibial post and to analyze the failure risk of the tibial post. Finite element models of a knee joint and an implant were developed from 1mm slices of CT images and 3D CAD software, respectively. The contact pressure and the von-Mises stress applying on the implant were analyzed by the finite element analysis in the neutral alignment as well as the 8 malalignment cases (3 and 5 degrees of valgus and varus angulations, and 2 and 4 degrees of anterior and posterior tilts). Loading condition at the 40% of one whole gait cycle such as 2000N of compressive load, 25N of anterior-posterior load, and 6.5Nm of torque was applied to the TKR models. Both the maximum contact pressure and the maximum von-Mises stress were concentrated on the anterior-medial region of the tibial post regardless of the malalignment, and their magnitudes increased as the degree of the malalignment increased. From present result, it is shown that the malalignment of the implant can influence on the failure risk of the tibial post.

2급 치근이개부 치료 시 흡수성 차폐막, 동종골 이식 및 혈소판 농축 혈장의 골 재생 효과에 대한 디지털 공제술의 정량적 분석

김상훈,임성빈,정진형,Kim, Sang-Hoon,Lim, Sung-Bin,Chung, Chin-Hyung 대한치주과학회 2002 Journal of Periodontal & Implant Science Vol.32 No.1

The purpose of this study was to evaluate effect of platelet rich plasma on the treatment of Grade II furcation involvement, with Demineralized Freeze-Dried Bone(Dembone(R)) and bioabsorable membrane(BioMesh(R)) in humans by digital subtraction radiography. 12 teeth(control group) were treated with Demineralized Freeze-Dried Bone(Dembone(R)) and bioabsorable membrane(BioMesh(R)), and 12 teeth(test group) were treated with Demineralized Freeze-Dried Bone(Dembone(R)), bioabsorable membrane(BioMesh(R)) and Platelet Rich Plasma. The change of bone density was assessed by digital subtraction radiography in this study. The change of mineral content by as much as 5%(vol) could be perceived in the subtracted images. The change of mineral content was assessed in the method that two radiographs are put into computer program to be overlapped and the previous image is subtracted by the later one. Both groups were statistically analyzed by Wilcoxon signed Ranks Test and Mann-whitney Test using SPSS program (5% significance level). The results were as follows: 1. In test group, the radiopacity in 3 months after surgery were significantly increased than 1 month after surgery(p<0.05). However. there were no significant difference between 1 month after surgery and 3 months after surgery in control group(p>0.05). 2. In test and control group, the radiopacity in 6 months after surgery were significantly increased than 1 month after surgery(p<0.05) 3. In test and control group, the radiopacity in 6 months after surgery were significantly increased than 3 months after surgery(p<0.05). 4. There were no significant difference between test group and control group at 1 month, 3 months after surgery, but radiopacity in test group were significantly increased than control group at 6 months after surgery(p<0.05). In conclusion, Platelet Rich Plasma can enhance bone density.

대학생의 흡연 유형 및 흡연과 심리사회적 요인의 관계에 관한 연구

김상훈,조용래,표경식,Kim, Sang-Hoon,Cho, Yong-Rae,Pyo, Kyung-Sik 한국정신신체의학회 1996 정신신체의학 Vol.4 No.2

For the purpose of examining the relationship between smoking, perceived stress and vulnerability factors, and furthermore suggesting interventions to reduce excessive smoking and prevent nicotine dependency effectively, the questionnaires of perceived stress(stressful experiences), ways of stress coping(passive and active copings), smoking motives, social influence, age, amounts of smoking, and nicotine dependency were administered to smokers among medical students in Chosun university(n=186). 1) As a result of classifying smokers by the types of smoking, the most was a type of smokers to reduce negative emotions and the next in order were addictive smokers, smoker for stimulation, smoker for pleasure, etc. 2) The effects of motive, age, and active coping style were significant, but the effects of perceived stress, passive coping style, and social influence were not significant in average amount of daily smoking. 3) The effects of motive, social influence, and age were significant, but the effects of perceived stress, passive and active coping styles were not significant in the degree of nicotine dependency. To summarize, it is concluded that there were a lot of people who smoke to solve negative emotions, but the direct effects of perceived stress and passive coping style on both average amounts of daily smoking and the degree of nicotine dependency were not significant. On the other hand, motive, age, active coping style, and social influence were proved to be more important variables than the others in explaining college students' smoking.

고등학교(高等學校) 재학생(在學生)들의 비합리적(非合理的) 신념(信念)과 정신병리(精神病理)

김상훈,최훈동,김학렬,Kim, Sang-Hoon,Choi, Hoon-Dong,Kim, Hack-Ryul 한국정신신체의학회 1995 정신신체의학 Vol.3 No.1

The purpose of this study is to investigate the relationship between irrational belief and psychopathology. The Korean version of Symptom Check List-90-R and Irrational Belief Test were administered to 621 high school students in group. The author used Pearson correlation coefficiency and multiple regression analysis to seek the regression patterns of the irrational belief. The results were as follows. 1) Most of the subscales of the SCL-90-R and Irrational Belief Test were correlated significantly. 2) In multiple regression analysis, the irrational belief associated with anxious overconcern was the most predictable variable for psychopathology.

JNI를 사용한 혼합형 실행 환경

김상훈,Kim Sang-Hoon 한국정보기술전략혁신학회 2002 情報學硏究 Vol.5 No.4

The tradeoff of Java's portability is the inefficiency of interpretation. Also, the standard Java class library may not support the platform-dependent features needed by your application. Several solutions have been proposed to overcome these problems, such as JNI, JIT, off-line bytecode compilers. In this paper, we present an mixed-mode execution model which Java virtual machine executes together with native code. This execution model and its translator preserves the ability to dynamically load bytecode, and reduce the difficulties of JNI usages. Our system is more efficient than JIT, and helps programmer to write C implementation for the native method without the concept of JNI.

갈색세포종과 복부 부신경절종의 임상적 특성 분석

김상훈,정승필,이정희,김지영,최민영,이세경,최준호,이정언,김지수,남석진,양정현<SUP>1<.SUP>,김정한,Sang-Hoon Kim,Seung-Pil Jung,Jeong-Hee Lee,Ji-Yeong Kim,Min-Yeong Choi,Se-Kyung Lee,Jun-Ho Choe,Jeong-Eon Lee,Jee Soo Kim,Seok-Jin Nam,Jung- 대한갑상선-내분비외과학회 2011 The Koreran journal of Endocrine Surgery Vol.11 No.4

비 환형 속성 문법을 이용한 코드 생성 시스템

김상훈,Kim, Sang-Hoon 한국정보기술전략혁신학회 2003 情報學硏究 Vol.6 No.4

This paper is the study for code generation using attribute grammar without cycle. For the purpose of this study, we designed metalanguage SDL which describes an attribute grammar and, represented attribute grammar to SDL. This attribute grammar is based on L-attributed grammar without cycle. This system consists of attributed-grammar analyzer and attribute evaluator. Attributed grammar analyzer takes a semantic description language and then generates useful informations that are needed by attribute evaluator. The evaluator calculates an attribute values using these information.

Seismic Performance of Transportation Networks

김상훈,김종인,Kim, Sang-Hoon,Massanobu, Shinozuka,Kim, Jong-In Earthquake Engineering Society of Korea 2004 한국지진공학회논문집 Vol.8 No.3

This paper describes a method of evaluating seismic system performance of highway transportation network in California. The basic element that plays a crucial role in this study is the fragility information of highway bridges in Caltrans' (California Department of Transportation) freeway network. The bridge fragility information is expressed as a function of the ground motion intensity, such as peak ground acceleration (PGA) or peak ground velocity (PGV). Network damage was evaluated under the 1994 Northridge earthquake and scenario earthquakes. A probabilistic model was developed to determine the effect of repair of bridge damage on the improvement of the network performance as days passed after the event. As an example, the system performance degradation measured in terms of an index, “Drivers Delay”, is calculated for the Los Angeles area transportation system, and losses due to Drivers Delay with and without retrofit were estimated.

용접 열영향부 미세조직 및 재질 예측 모델링: V. 저합금강의 초기 오스테나이트 결정립크기 및 냉각 속도의 영향을 고려한 용접 열영향부 상변태 모델

김상훈,문준오,이윤기,정홍철,이창희,Kim, Sang-Hoon,Moon, Joon-Oh,Lee, Yoon-Ki,Jeong, Hong-Chul,Lee, Chang-Hee 대한용접접합학회 2010 대한용접·접합학회지 Vol.28 No.3

In this study, to predict the microstructure in weld HAZ of low alloyed steel, prediction model for the phase transformation considering the influence of prior austenite grain size and cooling rate was developed. For this study, six low alloyed steels were designed and the effect of alloying elements was also investigated. In order to develop the prediction model for ferrite transformation, isothermal ferrite transformation behaviors were analyzed by dilatometer system and 'Avrami equation' which was modified to consider the effect of prior austenite grain size. After that, model for ferrite phase transformation during continuous cooling was proposed based on the isothermal ferrite transformation model through applying the 'Additivity rule'. Also, start temperatures of ferrite transformation were predicted by $A_{r3}$ considering the cooling rate. CCT diagram was calculated through this model, these results were in good agreement with the experimental results. After ferrite transformation, bainite transformation was predicted using Esaka model which corresponded most closely to the experimental results among various models. The start temperatures of bainite transformation were determined using K. J. Lee model. Phase fraction of martensite was obtained according to phase fractions of ferrite and bainite.