건축물 옥상녹화를 위한 방수기술 개발의 필요성에 관한 검토 : 방수재료 및 공법을 중심으로 Focus on the Waterproofing Materials and the Methods of Construction

권시원,김영삼,곽규성,오상근 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The need for this study must be considerable, as being activate for green roofs research that the organization and construction obtain access to more development technologies. Nevertheless, the green roofs system has begun to apply since 1980' s, the green roofs technology was restricted to develop without verification of technologies such as a load or water leakage. There are limit as urethane waterproofing to almost domestic waterproofing materials and methods of construction for general green roofs. The introduction of materials and methods of construction which are appropriated to property of green roofs could be a decisive factor in a long-range durability and economical maintenance cost, moreover, it support to variety construction system and organization. This present paper describes a necessity of waterproofing and root barrier system is one of the sub-organization based on green roofs construction, which have enormously large impact on the durability.

[논문]영구자석 동기전동기의 새로운 센서리스 속도제어

김영삼,권영안 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-

영구자석 동기전동기는 정확한 속도 및 토크 제어를 위해서 회전자의 속도뿐만 아니라, 회전자의 위치정보가 반드시 요구된다. 그러나 회전자의 위치 및 속도 센서들은 경제적인 문제점과 신뢰성 감소의 문제점을 가진다. 최근에는 이러한 문제점을 극복하기 위하여 속도 및 위치 센서를 사용하지 않는 센서리스 제어에 관한 연구가 많이 이루어지고 었다. 본 논문에서는 영구자석 동기전동기의 새로운 센서리스 제어방식으로서 MRAS(Model Reference Adaptive System) 방식을 제안한다. 본 방식은 MRAS의 기준모텔에서 측정전류를 피이드백하는 상태 관측기로부터 역기전력을 추정하고 비교모텔에서 영구자석 자속에 의한 수식을 이용하여 역기전력을 추정하며, 두 추정기 모텔에서 추정된 역기전력을 상호 비교하고 그 오차를 적웅 메카니즘에 적용하여 회전자 속도를 추정 하는 방식이다. 본 논문에서 제안한 알고리즘의 성능을 검증하기 위하여 시율레이션 및 실험을 수행하였다.

증기상 Beckmann 전이 반응에 대한 Aluminophosphate 분자체의 촉매 특성

윤영삼,박판욱,권성헌,김병주 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

Molecular sieves인 AIPO₄-5, SAPO-5 그리고 SAPO-11을 수열합성하여 제조한 다음 XRD, SEM, NH₃TPD와 IR을 통해 물리화확적 특성을 조사하였다. 증기상에서 cyclohexanone oxime의 Beckmann 전이 반응 결과는 oxime의 전화율과 Lactam의 수율에 있어서 SAPO-11가 반응성이 우수하였고, WHSV의 변화에 있어서는 AIPO₄-5와 SAPO-5 경우 WHSV가 증가할수록 전화율과 선택도는 감소하였지만 SAPO-11는 선택도가 증가함을 보였다. 본 대상 반응계인 Beckmann 전이 반응에서는 촉매의 기공 크기보다는 산성도에 더 큰 영향을 받음을 알수 있었다. AIPO₄-5, SAPO-5 AND SAPO-11 which are molecular sieves were synthesized by hydrothermal crystallization. The crystallinity of the prepared catalysts was confirmed by XRD and SEM, and their acidic properties were examined by TPD of NH₃and IR. Catalytic characteristics of the catalysts were tested by vapor phase Beckmann rearrangement of cyclohexanone oxime to caprolactam. The conversion of lactam and yield of lactam increased with acidity of the catalyst. Among the tested catalysts, SAPO-11 was excellent in Beckmann rearrangement reaction. AIPO₄-5 and SAPO-5 showed that conversion of oxime and selectivity of lactam decreased with the increase of WHSV but SAPO-11 showed different tendency in selectivity of lactam, or selectivity of lactam increased with the increase of WHSV. Beckmann rearrangement reaction was affected by acidity than pore size.

언어적 창의력 프로그램 개발 연구

이삼형,유영희,권순각 국어교육학회 2004 國語敎育學硏究 Vol.19 No.-

국어과 창의력은 언어적 창의력으로 구체화될 수 있으며, 언어적 창의력은 표현과 이해의 과정 전반에 걸쳐 두루 나타나고 있음을 알 수 있다. 언어적 창의력을 기르기 위해서는 일반적인(범교과적인) 창의적 프로그램에서 채택하고 있는 단순한 창의력 기법의 연습보다는 구체적인 과제를 해결해 나가는 실제적인 언어 활동을 통해서 하는 것이 바람직하다. 실제의 언어 활동에서 발현되는 창의력은 이해와 표현 모두 발상-구조화-언어화의 단계를 거쳐 결과가 나타난다. 창의력 프로그램은 발상, 구조화, 언어화, 메타화 등의 단계로 구성된다. 발상 단계에서는 느끼기와 깨닫기, 구조화 단계에서는 구체화하기, 관계짓기, 뒤집어보기, 미루어두기, 언어화 단계에서는 경험화하기, 감각화하기, 의미화하기, 개별화하기의 활동을 통해서, 메타화 단계에서는 선택하기, 배열하기, 평가하기 등의 활동을 통해서 학생들의 창의적인 능력을 신장시킬 수 있다. 본 연구의 활용 방안은 다음과 같다. 첫째, 언어적 창의력이 표현과 이해의 언어 활동과 별개로 존재하는 것이 아니므로 교과서의 학습 활동을 구체화하여 국어과 수업에서 창의적인 활동이 활발하게 이루어질 수 있도록 한다. 둘째, 발상 단계, 구조화 단계, 언어화 단계, 메타적 단계 등 각 단계에 적합한 활동들을 실제 수업에 활용할 수 있도록 구체화하고 나아가 학교장 재량활동 시간에 활용할 수 있도록 한다. The creativity which is essential ability in our own day is embodied by verbal creativity in Korean language education. The verbal creativity is realized in the all process of comprehension and expression. In this view it is more effective to develope verbal creativity through practical verbal activity than training creative technique. The creativity in the process of both comprehension and expression is similar. The creativity in the process of comprehension has to be embodied in text, it in the process of expression is based on new understanding about object. So that, the process of verbal creativity consists of the stage of idea that is starting point of new understanding, the stage of construction that organizes the new idea, the stage of language that embodies text. The program of verbal creativity consists of the stage of idea, construction. language and meta-cognition.

인터넷 중독 고위험 청소년의 성별에 따른 임상적, 정신병리적 특성

이지윤(Ji Yoon Lee),권준근(Jun-Gun Kwon),이준영(Jun-Young Lee),정희연(Hee Yeon Jung),손보경(Bo Kyung Sohn),최삼욱(Sam Wook Choi),김대진(Dai Jin Kim),최정석(Jung-Seok Choi) 한국중독정신의학회 2016 중독정신의학 Vol.20 No.1

Objectives : Most previous studies of Internet addiction (IA) have been performed on males, and little is known about gen-der differences in IA. We examined gender differences in the clinical and psychopathological features related to high-risk for IA among adolescents. Methods : 714 (male : N=389 ; fe-male : N=325) have reported questionnaires as follows ; 1) clinical and psychopathological features (depression, anxiety, Attention Deficit Hyperactivity Disorder (ADHD) symptoms, Smartphone addiction, impulsivity, behavioral inhibition and approach systems, state-trait anger, aggression, beliefs about aggression, and resilience) 2) Internet and Smartphone usage patterns. In 691 who completed the Young’s Internet Addiction Test (YIAT), A total of 487 adolescents were classified into the normal Internet use group, with YIAT scores of 20-39 (male :N=232 ; female : N=255) and 204 adolescents were classified into high-risk for IA group (male : N=144 ; female : N=60). Results : Most factors described above predicted high-risk for IA in male and female adolescents. Especially, the present study found that psychological resilience had negative association with possibility of IA in female, while cognitive impulsivity and hostile aggression were associated with possibility of IA in male adolescents. Conclusion : This study found gender-re-lated features in adolescents at high-risk for IA. Thus, gender-specific strategies are needed to maximize prevention and treatment effectiveness of IA.

급성 심근경색증을 동반한 혈전성 혈소판 감소성 자반증 1예

이태희,김진혁,김완중,박지영,강흥선,조정휘,김권삼,송정상,배종화 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.11

Multiscale Analysis in the Compressible Rotating and Heat Conducting Fluids

Kwon, Young-Sam,Maltese, David,Novotný,, Antoní,n Springer-Verlag 2018 Journal of mathematical fluid mechanics Vol.20 No.2

Clogging theory-based real time grouting management system applicable in soil conditions

Kwon, Young-Sam,Kim, Jinchun,Lee, In-Mo Techno-Press 2018 Geomechanics & engineering Vol.16 No.2

In this study, a real-time grouting management system based on the clogging theory was established to manage injection procedure in real time. This system is capable of estimating hydraulic permeability with the passage of time as the grout permeates through the ground, and therefore, capable of estimating real time injection distance and flow rate. By adopting the Controlled Injection Pressure (CoIP) model, it was feasible to predict the grout permeation status with the elapse of time by consecutively updating the hydraulic gradient and flow rate estimated from a clogging-induced alteration of pore volume. Moreover, a method to estimate the volume of the fractured gap according to the reduction in injection pressure was proposed. The validity of the proposed system was successfully established by comparing the estimated values with the measured field data.

Delay-dependent Guaranteed Cost Control for Uncertain State-delayed Systems

Young Sam Lee,Oh-Kyu Kwon,Wook Hyun Kwon 대한전기학회 2005 International Journal of Control, Automation, and Vol.3 No.4

LARGE TIME BEHAVIOR FOR THE DEGENERATE COMPRESSIBLE NAVIER-STOKES EQUATIONS WITH DAMPING

Kwon, Young-Sam Korean Mathematical Society 2019 대한수학회보 Vol.56 No.3

In this paper we consider degenerate compressible Navier-Stokes equations giving rise to a variety of mathematical problems in many areas. We study the long time behavior for the degenerate compressible Navier-Stokes equations with damping.