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류진영 ( Jin-young Ryu ),장승주 ( Seung-ju Jang ),임채덕 ( Chae Duk Lim ),마유승 ( Yu Sung Ma ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
현재 오픈소스인 리눅스를 기초로 많은 프로젝트들이 진행되고 있다. 그러나 하드웨어의 지식과 밀접한 관계를 가지고 있는 리눅스 디바이스 드라이버 개발 분야는 접근이 어려워 개발자들 역시 주의하고 있는 실정이다. 본 논문은 리눅스 디바이스 드라이버의 오류 유형을 토대로 오류 없이 정상적으로 동작하는 리눅스 디바이스 드라이버 개발을 위한 테스트 모듈 개발에 목적을 둔다.
류진영,모용운,김경래,Ryu Jin-Young,Mo Yong-Woon,Kim Kyung-Rai 한국건설관리학회 2000 한국건설관리학회 논문집 Vol.1 No.3
본 논문은 건설 감리 수행시 영향을 미치는 계층적 관리요소를 분석하여 감리사업 평가 모델을 구축함으로써 감리 프로젝트 수행시의 효율을 극대화시키는데 그 목적이 있다. 연구는 현장 실무자에 대한 설문조사를 통해 감리사업의 현황과 영향요소를 산정하였고, 이를 바탕으로 현장 감리자의 운영 및 관리능력을 평가할 수 있는 평가 모델을 구축하였다. 이러한 평가도구를 감리사업의 의사결정 및 평가 프로세스에 반영하여 전반적인 사업관리상의 효율을 증대시킬 수 있다. The purpose of this study is to maximize project efficiencies in construction management by analyzing hierarchical factors that effect in project supervision system, and consequently constructing managerial CSF(Critical Success Factors). For this study, the tools for evaluating operating and management abilities of site engineers are built from analyzing status and issues, deducing influence factors and rating cardinal scales of these factors from survey results. These evaluation tools are reflected to the construction supervision decision making process so that can improve project management effectiveness.
디지털 방사선에서 조사선량과 관전압조절에 의한 원본영상과 처리영상 분석
김보라,류신영,석진영,최준구,Kim, Bo-Ra,Ryu, Sin-Young,Seok, Jin-Young,Choi, Jun-Gu 대한디지털의료영상학회 2011 대한디지털의료영상학회논문지 Vol.13 No.1
Dynamic range on the digital detector can be a representation to the ratio of maximum and minimum of pixel value. Wide dynamic range and post processing ability of the digital detector made difficult to recognize visually to high or low dose images. We were evaluated a change of mean pixel value on the original and processed image, when we controlled the kVp, mA, exposure time on the digital detector. On the kVp of a constant condition, we were acquired an original and processed image by changes of mA, exposure time. According to the thickness of the subject under the same conditions, to determine a relation of pixel value and X-ray intensity, we used an aluminum step wedge. When mA and exposure times were changed under the kVp of a constant condition, the X-ray intensity was decreased by the reduction of the mean pixel value. In addition when kVp was increased in a constant condition of mAs, the mean pixel value was increased according to the increment of the X-ray intensity. Therefore, low kVp, high mA and short exposure time were a way to reduce a patient dose.
석창포(石菖蒲) 전탕액(煎湯液)이 Glucose Oxidase에 의해 손상(損傷)된 대뇌피질(大腦皮質) 신경세포(神經細胞)에 미치는 영향(影響)
최공한,박승택,류도곤,최민호,허진영,강성도,고정수,양상철,성은경,조남수,이춘우,서의석,류영수,Choi, Kong-Han,Park, Seung-Taeck,Ryu, Do-Gon,Choi, Min-Ho,Hea, Jin-Young,Kang, Sung-Do,Go, Jeong-Soo,Yang, Sang-cheal,Sung, Yeun-Kyung,Cho, Nam-Su,L 대한동의생리학회 1999 동의생리학회지 Vol.14 No.2
The purpose of this study is to examine the toxic effects caused by Glucose Oxidase(GO) and the effects of herbal extracts such as Acori Rhizoma(AR) on the treatment of the toxic effects. For this purpose, experiments with the cultured cell from the cerebrums of new born mice were done. The results of these experiments were as follows. 1. GO, a oxygen radical, decreased the survival rate of the cultured cells on NR assay and MTT assay. 2. GO, a oxygen radical, decreased the amount of neurofilaments and total protein. 3. AR have efficacy of increasing the amount of neurofilament. 4. AR have efficacy of increasing the amount of total protein. From the above results, It is concluded that AR has marked efficacy as a treatment for the damages caused in the GO-mediated oxidative process. And AR is thought to have certain pharmacological effects on controlling over aging. Further clinical study of this pharmacological effects of AR should be complemented.
IPS 구축을 위한 Embedded Linux 성능 비교
양중규 ( Seung-ju Jang ),류진영 ( Jin-young Ryu ),남진우 ( Jin-woo Nam ),장승주 ( Joong-kyu Yang ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
본 논문은 IPS 구축에 있어서 핵심적인 역할을 수행하는 운영체제를 위해 최근 각광을 받고 있는 Embedded Linux Kernel 의 성능을 테스트하기 위한 환경을 구축한다. Benchmarking tool 인 UnixBench 프로그램을 사용하여 성능을 테스트 한다. 또한 standard kernel 의 성능 테스트도 같이 포함하여 종합적으로 성능 결과를 비교 분석한다. 이런 실험 결과를 통해서 IPS 시스템에 적합한 임베디드 리눅스 운영체제 결정을 하고자 한다.
우기도,박영구,김석원,진영철,류재화,나종필 ( K . D . Woo,Y . K . Park,K . W . Kim,Y . C . Jin,J . H . Ryu,J . P . Ra ) 한국열처리공학회 1998 熱處理工學會誌 Vol.11 No.2
N/A The graphitization is affected by the addition of small amount of the elements, such as Si, Al, Ni, B, Cr and Mn etc. Boron is well known as the most effective element for the graphitization of cementite in high carbon steels. But a study on quantitative analysis of B effect on the graphitization is few reported. Therefore the effect of boron addition in Fe-0.65%C-1.0%Si-0.5%Mn steels on the graphitization is investigated quantitatively using hardness tester, optical microscope and scanning electron microscope, neutron induced microscopic radiography. The graphitization in high carbon steels is promoted with 0.003∼0.005%B addition. But the graphitization in steels which has no boron takes long holding time at 680∼720℃. The hardness of quenched steel containing 0.003%B is higher than that of 0.005%B added steel due to complete dissolution of fine graphites into the austenite. The 0.003%B added high carbon steel graphitized at 680℃ for 25hr is useful steel for the agricultural implements and automobile parts which needed a good formability and high hardness.
김도명(Domyung Kim),남수현(Suhyun Nam),류시대(Sidae Ryu),장동훈(Donghoon Jang),석진영(Jinyoung Suk),박정주(Jeongjoo Park),김성남(Sungnam Kim),배재성(Jaesung Bae) 항공우주시스템공학회 2018 항공우주시스템공학회 학술대회 발표집 Vol.2018 No.11
고정익 항공기의 날개 변형에 따른 비행특성 변화와 이에 따른 비행제어법칙을 실증하기 위하여 모핑날개 무인항공기 시스템을 제작하였다. 비행시험용으로 제작된 기체는 향후 개발될 모핑 메커니즘이 작동하는 실제 모핑날개 스팬의 최대/최소 변형을 고려한 고정된 시험용 날개를 적용하고 각각의 모핑 상태에 대한 비행성을 확인함을 목적으로 하였다. 비행시험을 위하여 비행제어컴퓨터와 지상제어시스템을 개발하였으며 지상에서 비행제어컴퓨터의 탑재 운용로직 및 제어법칙의 동작을 확인하였으며 지상제어시스템과 연동시험을 통하여 비행시험을 위한 시스템 통합을 완료하였다.
칠복음(七福飮)이 Glucose Oxidase에 의해 손상(損傷)된 대뇌피질(大腦皮質) 신경세포(神經細胞)에 미치는 영향(影響)
최공한,박승택,류도곤,최민호,엄상섭,허진영,강성도,고정수,서의석,성은경,조남수,이춘우,황일택,선성규,류영수,Choi, Kong-Han,Park, Seung-Taeck,Ryu, Do-Gon,Choi, Min-Ho,Um, Sang-Sub,Hea, Jin-Young,Kang, Sung-Do,Go, Jeong-Soo,Sou, Eui-Suk,Sung, Yeun-Ky 대한동의생리학회 1999 동의생리학회지 Vol.14 No.2
As the average life span have been lengthened and the rate of senile population have been raised, chronic degenerative diseases incident to aging has been increased rapidly and become a social problem. With this social background, recently, the facts that oxygen radicals(OR) have toxic effects on Central Nervous System and Peripheral Nervous System and cause neuropathy such as Parkinson's Disease, Alzheimer Disease have been turned out, and accordingly lots of studies on the mechanism of the toxic effects of OR on nerves, the diseases caused by OR and the approaches to curing the diseases have been made. The purpose of this study is to examine the toxic effects caused by Glucose Oxidase(GO) and the effects of herbal extracts such as Chilbokyeum(CBY) on the treatment of the toxic effects. For this purpose, experiments with the cultured cell from the cerebrums of new born mice were done. The results of these experiments were as follows. 1. GO, a oxygen radical, decreased the survival rate of the cultured cells on NR assay and MTT assay 2. GO, a oxygen radical, increased lipid peroxidation and the amount of LDH. 3. CBY have efficacy of decreasing lipid peroxidation. 4. CBY have efficacy of decreasing the amount of LOH. From the above results, It is concluded that Chilbokyeum has marked efficacy as a treatment for the damages caused in the GO-mediated oxidative process. And Chilbokyeum is thought to have certain pharmacological effects on controlling over aging and treating Dementia. Further clinical study of this pharmacological effects of Chilbokyeum should be complemented.