제7차 교육과정에 대응하는 초등학교 학습공간의 공간구조에 관한 연구

김승중,김용승 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2

The change of a society each field influenced in change of a education field. What is called, can assume that introduction of new education method called open education is one of change. And, this causes great effect to the change of educational program that is one of national policy also. In the 6th training courses, accommodate education that classroom space changes too by change of the 7th educational program and is changing for direction that can maximize effect of education. The purpose of this study grasps the characteristic through type classification of classroom space that appear by countermove about change of the 7th educational program and reveal the form of most suitable studying space.

수치해석을 이용한 팬터그래프의 공기역학적 압상력 예측 방법

김승중,권혁빈,안준선 한국철도학회 2022 한국철도학회논문집 Vol.25 No.7

We performed large-eddy simulations to describe the flow around a pantograph facing a high speed flow of 430 km/h. Because pantograph was a linkage structure, both drag and lift forces were considered to accurately predict aerodynamic uplift force. The drag and lift forces exerted on individual structures were employed to derive force and moment equilibrium equations of the pantograph, and thus the aerodynamic uplift force was calculated. To examine the effects of a cover, the same analysis was carried out for a case in which a cover was installed around the lower part of the pantograph. As a result, when the cover was implemented, the total lift force was reduced due to downward lift force on the pantograph, and so aerodynamic uplift force also diminished. However, the cover contributed to a decrease in the standard deviation of the aerodynamic uplift force, leading to increased current collection quality.

수치해석을 이용한 일반형 전동차 내부 공기연령 개선 연구

김승중,송동민,권혁빈,안준선 한국철도학회 2022 한국철도학회논문집 Vol.25 No.11

We performed 3-D steady numerical simulations to describe flows inside an electric multiple unit (EMU), including duct systems at the top. Two cases were considered: a pair of straight-type ducts parallel to the unit and a pair of X-type ducts diverging from the center. The flow distributions were compared, and the age of air was calculated to evaluate the performance of the forced ventilation system according to design changes of the duct system. For the X-type duct system, the deviation of the flow velocity decreased along the distance from the center to the ends, while the lateral flow became active. Therefore, compared to the straight-type duct system, the flow with the X-type duct system became relatively uniform, and the circulated flow was smoothly discharged to the returns. In addition, the X-type duct system was found to reduce the averaged local mean age of air by up to 6.2 % compared to the straight-type duct system, considering the locations of passengers.

Aerodynamic performance of a pantograph cover for high-speed train

김승중,권혁빈,안준선 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.9

Three-dimensional unsteady turbulent flow around Faiveley CX pantograph was described by large-eddy simulations. The aerodynamic force distributions on the structures of the pantograph were explored comparing non-cover and cover cases against the incoming flow velocity of 200, 300, 400 km/h. The averaged drag and lift forces exerted on each component of the pantograph followed the second-order polynomial relations against the incoming flow velocity. The pantograph cover reduced the overall drag forces on the pantograph because the large recirculating zone with the strong negative pressure affected to the lower parts of the pantograph. In addition, when the pantograph cover was employed, the wall-normal direction of the lift force was changed from positive (uplift force) to negative (down force). By using the force and momentum balance considering all components of the pantograph, its aerodynamic uplift force was estimated, which was improved by including the specific forces around the knee joints, where the strong flow directly impinged. The pantograph cover reduced the mean and standard deviation values of the aerodynamic uplift forces as 40~48 % and 5~17 % compared to those for non-cover cases. Although more power was necessary to raise up the panhead to contact the catenary wire, it would help to improve the controller design to maintain the current collection performance by decreasing the uplift force fluctuations.

農村經濟貧困脫皮를 爲한 農業安政問題

김승중 成均館大學校 經濟學會 1963 成均經濟 Vol.10 No.1

제7차 교육과정에 대응하는 초등학교 저학년 학습공간의 이용특성에 관한 연구

김승중,김용승 대한건축학회 2002 대한건축학회논문집 Vol.18 No.12

Educational method is changed because of the change of society in 20th century.<br/> What we called, introduction of a new edecational method that is called open education is one of the change. And, this influenced a educational program greatly that is one of the national policy.<br/> A learning space is changed for a direction that can maximize a effect of education because of the change of educational programs from 6th educational programs to the 7th educational programs.<br/> The purpose of this study is for grasp the characteristics of the learning space through type classification of learning space that appeared by countermove about the change of the 7th educational program and reveal the spatial structure of the most suitable learning space.

코칭 리더십이 인사평가효과성에 미치는 영향: 상사신뢰와 조직신뢰의 매개효과를 중심으로

김승중(Seung Jugn, Kim),탁진국(Jinkook Tak) 강원대학교 사회과학연구원 2021 사회과학연구 Vol.60 No.2

본 연구의 목적은 조직의 성과관리 성공모형을 제시하는데 있다. 성과관리의 효과성을 측정하는 준거변인으로 피평가자인 직원이 인식하는 인사평가효과성을 설정하였다. 인사평가효과성에 영향을 미치는 선행변인으로 상사의 코칭 리더십을 설정하였다. 인사평가 결과는 구성원의 이해관계에 중요한 영향을 미치게 됨으로 평가제도에 대한 구성원의 인식과 태도가 평가제도의 성공적인 운영에 영향을 미칠 것으로 예상하였다. 상사의 코칭 리더십이 어떤 심리적 매커니즘을 거쳐서 인사평가효과성에 영향을 미치는지 분석하고자 직원이 인식하는 상사신뢰와 조직신뢰를 매개변인으로 설정하였다. 본 연구를 위해 국내의 대기업과 중견기업에 종사하고 있는 현직자 중에서 현재 직장에서 3년 이상 근무하고 있는 사람을 대상으로 설문조사를 실시하여 275개의 자료를 수집하였다. 연구의 결과는 코칭리더십이 인사평가효과성에 정적인 영향을 미치는 것으로 나타났다. 코칭 리더십은 상사신뢰에 정적인 영향을 미치는 것으로 나타났으며, 상사신뢰는 조직신뢰에 정적인 영향을 미치는 것으로 나타났다. 조직신뢰는 인사평가효과성에 정적인 영향을 미치는 것으로 나타났다. 상사신뢰와 조직신뢰는 코칭 리더십과 인사평가효과성을 순차적으로 매개하는 것으로 나타났다. 이러한 연구결과를 토대로 연구의 시사점, 제한점 및 향후 연구과제에 대해 논의하였다. The purpose of this study is to present an organization"s performance management success model. As a criterion variable that measures the effectiveness of performance management, the performance evaluation system effectiveness recognized by the employee who is the subject of the evaluation was set. The coaching leadership of the supervisor was set as a leading variable that affects the performance evaluation system effectiveness. As the results of performance apprasial have a significant impact on employees, it is expected that the employees" perceptions and attitudes toward the performance apprasial will affect the successful operation. By setting the boss trust and organizational trust recognized by employees as mediators, we analyzed how the manager"s coaching eadership affects the performance apprasial effectiveness through which psychological mechanism. For this study, 275 data were collected by conducting a questionnaire survey on those who have been working for more than 3 years at the current workplace among incumbent workers in large and medium-sized companies in Korea. The results of the study showed that coaching leadership had a positive effect on the performance evaluation system effectiveness. Coaching leadership was found to have a positive effect on the boss trust, and the boss trust was found to have a positive effect on the organization trust. Organization trust was found to have a positive effect on the performance evaluation system effectiveness. It was found that the boss trust and the organization trust sequentially mediated the effectiveness of coaching leadership and performance evaluation system effectiveness. Based on these findings, the implications, limitations, and future research tasks were discussed.

B2B 기반의 XML 문서 설계 및 보안에 관한 연구

김승중(Seung-Joong Kim),조현훈(Hyun-Hoon Cho),류성열(Sung-Yul Rhew) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1A

“B2B 에서의 XML 보안”에 관해서 현재 많은 연구가 활발히 진행되고 있다. 인터넷상에서 뛰어난 확장성을 가지고 있고, 풍부한 자료구조, 국제적 문자에 대한 탁월한 처리를 가진 XML을 많은 기업들이 B2B(Business to Business)에서 많이 사용하고 있다. 또한 EDI(Electronic data Interchange)에서도 XML을 사용한 문서 교환이 활발하게 이용되고 있다. 하지만 XML 에서는 보안에 관한 많은 취약점을 가지고 있는 것이 사실이다. 본 논문은 XML의 보안상의 취약점, XML의 보안에 대한 기술, 그리고 인터넷에서 XML 디지털 인증에 관해 구현하였다.

신장; 일측성 요로폐쇄 흰쥐 신장에서 암모니아 운반체의 발현

김승중 ( Seung Jung Kim ),김혜영 ( Hye Young Kim ),최재현 ( Jae Hyun Choi ),이동화 ( Dong Hwa Lee ),김경민 ( Kyung Min Kim ),김선문 ( Sun Moon Kim ),권순길 ( Soon Kil Kwon ),신경섭 ( Kyung Sub Shin ),김경숙 ( Kyung Sook Kim ) 대한내과학회 2014 대한내과학회지 Vol.86 No.4

목적: 일측 요로폐쇄는 요중 산배설이 감소하는 질환으로 대부분 요 암모니아 배설의 감소에 의한 것으로 알려져 있다. 본 연구는 일측 요로 폐쇄 흰쥐에서 산배설의 변화와 암모니아 운반체인 Rh C Glycoprotein (Rhcg)의 발현 변화를 확인하여 신세뇨관산증의 병인에 암모니아 운반체의 역할을규명하고자 하였다. 방법: Sprague-Dawley계 웅성 흰쥐를 사용하였으며, 실험군은 24시간 일측 요로폐쇄를 유발시켰다. 대조군과 실험군은 대사케이지에 mineral oil을 처리하여 24시간 동안 요를수집하였다. Rhcg의 면역조직화학염색을 시행하였고 세포크기, 총 Rhcg 발현, 자유세포면의 Rhcg 발현에 대하여 면역조직화학염색법을 정량화 분석하였다. 결과: 일측 요로폐쇄군에서 혈중 tCO2 농도는 대조군 27.5± 2.8 mEq/L에 비하여 실험군은 25.2 ± 1.0 mEq/L로 감소하였다(p < 0.05). 24시간 요 암모니아 배설은 대조군 0.38 ±0.08 mmol에 비하여 실험군에서 0.19 ± 0.03 mmol로 요 암모니아 배설이 감소하였으며(p < 0.05), Urine pH는 양 군 간에차이가 없어 일측성 요로폐쇄에 의해 신세뇨관산증이 유발되었음을 확인하였다. 반정량적 immunoblot 검사에서 Rhcg의 단백 발현은 양군 간에 유의한 차이가 없었다. 면역조직화학염색과 정량화 분석 결과 일측 요로폐쇄군에서 Rhcg의면역반응성은 비폐쇄부위 콩팥에서는 차이가 없었으나 폐쇄부위 콩팥에서는 감소하였다. 결론: 일측 요로폐쇄 흰쥐에서 암모니아 배설 감소와 폐쇄부위 콩팥에서 Rhcg의 면역반응성의 감소가 동반되었다. 따라서 일측 요로폐쇄의 산성화 장애 병인에 암모니아 운반체 Rhcg가 중요한 역할을 할 것으로 생각된다. Background/Aims: Urinary tract obstruction induces a form of renal tubular acidosis with a urinary acidification defect caused by decreasing net acid excretion, which is predominantly due to a decrease in urinary ammonia excretion. The present study examined whether this decrease is associated with changes in the renal expression of an ammonia transporter family member, Rh C glycoprotein (Rhcg), in rats with a unilateral ureteral obstruction. Methods: Male Sprague-Dawley rats underwent a 24-h unilateral ureteral obstruction. Rhcg expression was then evaluated by immunoblotting and immunohistochemistry. Cell height, total cellular expression, expression in the apical 25% of the cell, and % of total expression in the apical region were quantified by immunohistochemistry with quantitative morphometric analysis. Results: After 24 h of unilateral ureteral obstruction, the serum bicarbonate level and total urinary ammonia excretion were decreased. Both light microscopy and immunohistochemistry with quantitative morphometric analysis demonstrated that the total intensity of Rhcg expression was decreased in the obstructed kidneys, whereas Rhcg expression did not change in the cortical collecting duct (CCD) and outer medullary collecting duct (OMCD) of nonobstructed kidneys in rats with a 24-h unilateral ureteralobstruction. Conclusions: The rats with a unilateral ureteral obstruction showed decreased urinary ammonia excretion associated withdecreased Rhcg expression in the CCD and OMCD. These changes suggest that the ammonia transporter Rhcg mediates a urinaryacidification defect associated with unilateral ureteral obstruction. (Korean J Med 2014;86:444-452)

신장 ; 아밀로라이드 유발 신세뇨관산증 흰쥐 신장에서 암모니아 운반체의 발현

김승중 ( Seung Jung Kim ),김혜영 ( Hye Young Kim ),최재현 ( Jae Hyun Choi ),김정태 ( Jung Tae Kim ),김정은 ( Jeong Eun Kim ),연명호 ( Myeong Ho Yeon ),김선문 ( Sun Moon Kim ),권순길 ( Soon Kil Kwon ),신경섭 ( Kyung Sub Shin ) 대한내과학회 2011 대한내과학회지 Vol.80 No.6

목적: 신세뇨관산증은 요중 산 배설이 감소하는 질환으로, 대부분 요 암모니아 배설의 감소에 의한 것이다. 본 연구는 아밀로라이드로 유발된 신세뇨관산증 흰쥐에서 산 배설의 변화와 암모니아 운반체인 Rh B Glycoprotein (Rhbg)와 Rh C Glycoprotein (Rhcg)의 발현 변화를 확인하여 신세뇨관산증의 병인에 암모니아 운반체의 역할을 규명하고자 하였다. 방법: Sprague-Dawley계 웅성 흰쥐를 사용하였으며, 실험군에는 amiloride (3 mg/kg/day)를 6일간 복강 내 주입하였다. 7일째 대사케이지에 mineral oil을 처리하여 24시간 동안 요를 수집하였다. Rhbg와 Rhcg의 단백 발현을 평가하기 위하여 immunoblot와 면역조직화학염색을 시행하였고, 면역조직화학염색법을 정량화 분석하였다. 결과: 아밀로라이드 투여군에서 혈중 tCO2 농도는 대조군 25.6±1.5 mEq/L에 비하여 23.0±1.5 mEq/L로 감소하였으며 (p<0.05), 혈중 K+농도는 대조군 3.84±0.34 mmol/L에 비하여 4.50±0.46 mmol/L로 약간 높았다(p<0.05). 아밀로라이드 투여군에서 24시간 요 암모니아 배설은 대조군 0.52±0.07 mmol에 비하여 0.30±0.03 mmol으로 요 암모니아 배설이 감소하였으며(p<0.05), Urine pH는 양 군 간에 차이가없어 아밀라이드 투여에 의해 신세뇨관산증이 유발되었음을 확인하였다. 반정량적 immunoblot 검사에서 Rhbg와 Rhcg의 단백 발현은 양 군 간에 유의한 차이가 없었다. 면역조직화학염색과 정량화 분석 결과 아밀로라이드 유발 신세뇨관산증군에서 Rhcg의 면역반응성은 감소하였으나, Rhbg의 면역반응성은 유의한 차이가 없었다. 결론: 아밀로라이드 투여 흰쥐에서 암모니아 배설 감소와 Rhcg의 면역반응성의 감소가 동반되었다. 따라서 아밀로라이드 유발 신세뇨관 산증의 병인에 암모니아 운반체 Rhcg가 중요한 역할을 할 것으로 생각한다. Background/Aims: Renal tubular acidosis (RTA) decreases the net acid excretion, predominantly due to a decrease in urinary ammonia excretion. This study examined whether this decrement is associated with changes in the renal expression of the ammonia transporter family members, Rh B glycoprotein (Rhbg) and Rh C glycoprotein (Rhcg), in rats with amiloride-induced RTA. Methods: Male Sprague-Dawley rats were treated intraperitoneally with amiloride (3 mg/kg/day) for 6 days. Rhbg and Rhcg expression was evaluated by immunoblotting and immunohistochemistry. Cell height, total cellular expression, expression in the apical 25% of the cell, and apical expression as a percentage of total expression were quantified using immunohistochemistry with quantitative morphometric analysis. Results: After amiloride treatment for 6 days, the serum bicarbonate level was decreased, and serum potassium was increased. The total urinary ammonia excretion and potassium excretion were decreased. The total Rhbg and Rhcg protein expression levels were not changed in the cortex or outer medulla of the kidney. Light microscopy and immunohistochemistry with quantitative morphometric analysis demonstrated that total Rhcg expression was decreased in the cortical collecting duct (CCD) and outer medullary collecting duct (OMCD) in amiloride-induced RTA, whereas Rhbg immunoreactivity was unchanged. Conclusions: Rats with amiloride-induced RTA have decreased urinary ammonia excretion associated with decreased Rhcg expression in the CCD and OMCD, suggesting that the ammonia transporter Rhcg plays an important role in the pathogenesis of amiloride-induced RTA. (Korean J Med 2011;80:687-696)