http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
신이식 후 호전을 보인 Nephrogenic Fibrosing Dermopathy
김훈수 ( Hoon Soo Kim ),김수한 ( Su Han Kim ),고현창 ( Hyun Chang Ko ),김문범 ( Moon Bum Kim ),송상헌 ( Sang Heon Song ),김정섭 ( Jung Sup Kim ),곽임수 ( Ihm Soo Kwak ) 대한피부과학회 2010 대한피부과학회지 Vol.48 No.2
Nephrogenic fibrosing dermopathy (NFD) is a rare cutaneous fibrosing disorder that primarily affects patients with a history of renal disease. NFD manifests with induration, thickening and hardening of the skin with brawny hyperpigmentation. Lesions are typically symmetrical and usually develop on the limbs and trunk. Flexion contractures of the joints may be a feature of the disease. Histopathological features of NFD include proliferation of dermal fibroblasts and dendritic cells, thickened collagen bundles, increased elastic fibers and focal mucin deposition. Although the pathogenesis remains largely unknown, some of the factors implicated in the pathogenesis include renal dysfunction, circulating fibrocytes, vascular injury, and gadolinium which is a contrast material used in magnetic resonance imaging. Currently, no definitive or uniformly effective therapies are available for the treatment of NFD. We herein describe the case of a 44-year-old female NFD patient who undergoes significant improvement of skin lesions and associated joint contracture after renal transplantation. (Korean J Dermatol 2010;48(2):143∼147)
연구논문 : 한국 생명공학정책의 형성과 과학자집단의 정책 활동: 유전공학육성법 제정에서 "바이오텍 2000" 수립까지
김훈기 ( Hoon Gi Kim ) 한국과학사학회 2010 한국과학사학회지 Vol.32 No.2
Korean government`s support for biotechnology field began in early 1980`s. The main aim was economic growth through the application of biotechnology. Ministry of Science and Technology included genetic engineering as one prominent field in the Development Plan for Economy and Society(1982-1986), and National Assembly established Genetic Engineering Support Act in 1983. Ten years later, the overall ministries started to promote biotechnology in the name of Biotech 2000, and the main aim was still economic growth. But the substantive contents of Biotech 2000 were some distance from the aim of it, and all the more became weak in comparison with the situation in early 1980`s. This article showed that the scientists who were involved in the process of biotechnology policy formation had a decisive effect to the trend of governmental strategy. At first the scientists chose the genetic engineering field intentionally for persuading governmental officials to be worth money. Afterwards they tried to change the name of the field from genetic engineering to biotechnology because they wanted to be supported more broadly. There was some disagreement about the range of support within scientists group when they acted to make the Act. This led the uncommon definition of the field "genetic engineering" through a compromise among scientists. This study would help to understand the characteristics of early biotechnology field in Korea, and suggest the necessity of examining how much the opinion of scientists group has influenced the governmental policy until recently.
김훈학(Hoon-Hak Kim) 한국컴퓨터정보학회 2010 韓國컴퓨터情報學會論文誌 Vol.15 No.5
도립진자 시스템에서 칼만 필터링 최적의 결과를 얻기 위해서는 잡음 공분산 행열 Q, 측정잡음 공분산 행열 R과 초기 에러 공분산 행열 P<sub>0</sub>와 같은 인자가 필요하다. 이러한 인자는 실제 상황에서 근사화된 값을 사용하거나 정확한 값을 알 수 없기 때문에 칼만 필터의 최적화에 영향을 미치지 않거나 이러한 공분산 행열의 스칼라 이득변화에 덜 민감한 경우를 연구의 대상으로 하고 있다. 또한 상태 측정시 에러를 예측하는 방법으로 구해진 에러 공분산 행열은 상태측정 값 보다는 공분산 행열의 이득과 연관성을 가지게 된다. 따라서 3가지 공분산 행열과 칼만 이득 그리고 에러 공분산 행열 간의 상관관계가 잡음인자인 스칼라 이득과의 연관성을 해석하고자 하였다. 본 연구는 3절에서 도립진자 시스템 모델을 간략하게 정리를 하였고 4절에서는 이러한 모델을 기반으로 하여 컴퓨터 시뮬레이션을 위한 도립진자 시스템에 대한 수학적 동적모델을 구성하고 5절에서는 이러한 인자와 스칼라 이득 값을 이용한 다양한 시뮬레이션 결과를 통하여 잡음인자의 연관성을 해석하였다. The Optimal results of Kalman Filtering on the Inverted Pendulum System requires an effective factor such as the noise covariance matrix Q, the measurement noise covariance matrix R and the initial error covariance matrix P<sub>0</sub>. We present a special case where the optimality of the filter is not destroyed and not sensitive to scaling of these covariance matrix because these factors are unknown or are known only approximately in the practical situation. Moreover, the error covariance matrices issued by this method predict errors in the state estimate consistent with the scaled covariance matrices and not the issued state estimates. Various results using the scalar gain δ are derived to described the relations among the three covariance matrices, Kalman Gain and the error covariance matrices. This paper is described as follows: Section III a brief overview of the Inverted Pendulum system. Section IV deals with the mathematical dynamic model of the system used for the computer simulation. Section V presents a various simulation results using the scalar gain.
전기습윤셀 구조를 갖는 플렉서블 디스플레이와 소스 드라이버 설계에 관한 연구
김훈학(Hoon-Hak Kim) 한국컴퓨터정보학회 2012 韓國컴퓨터情報學會論文誌 Vol.17 No.9
본 논문에서는 전기습윤(Electrowetting) 디스플레이의 효율적인 생산을 위해 섬유형식의 전극들을 제안하고, 이러한 방법을 이용한 전기습윤 셀 구동형 플렉서블 디스플레이의 소스 드라이버 설계방법을 제안하였다. 전기습윤 셀 매트릭스는 임프린팅 방법에 의하여 PET 등의 Substrate 위에 구성하고 셀 매트릭스 사이의 간격에는 드라이버섬유, 습윤 전극섬유와 전도성 섬유를 가로와 세로로 배치하고, 교차점에는 전기적 접점을 구성하여 전기습윤 셀매트릭스가 구동되도록 하였다. 기존의 소스 드라이버에서는 각 채널당 R/2R방식의 DAC을 사용하므로 사용되는 소자의 수가 증가하여 집적도가 저하되는 단점이 있다. 따라서 본 논문에서는 채널당 소자의 수를 감소시켜 집적도를 높이고 비용을 절감할 수 있는 저 전력 소스 드라이버 설계방법을 제안하고 VHDL 프로그램을 이용한 시뮬레이션으로 타당성을 검증하였다. The Fabric Electrode was proposed for the effective production of the display based on electrowetting in this paper and designed the source driver of flexible display which could be driven by the electrowetting cell. The electrowetting cell matrix was implemented on the substrate(PET) by imprinting. The driver fabric, wetting electrode fabric and conductive fabric was placed horizontally and vertically in the groove between cell matrix and the electrowetting cell matrix can be driven by the cross-point as electric connection. The integration density of driver module is decreased because using the R/2R DAC module per channel in the conventional method. The proposed method could utilize the effective production process and reduce the production price of a display panel. The source driver which consume lower power and can increase the integration density because of reducing the number of driver device per channel was designed and evaluate the driver operation by the simulation using the VHDL programming in this paper.