황석영의 제자 김한수가 쓴 ' 황석영 석방이유서 ' : 황석영을 가두지 말고 우리의 미래를 가두라

김한수 사회평론 1996 사회평론 길 Vol.96 No.11

Research Infrastructure Foundation for Core-technology Incubation of Radiation Detection System

김한수,하장호,김영수,차형기 한국방사선산업학회 2012 방사선산업학회지 Vol.6 No.1

The development of radiation detection systems mainly consist of two parts-radiationdetector fabrication including material development, and its appropriate electronics development. For the core-technology incubation of a radiation detection system, radiation fabrication and anevaluation facility are scheduled to be founded at the RFT (Radiation Fusion Technology) Centerat KAERI (Korea Atomic Energy Research Institute) by 2015. This facility is utilized for thedevelopment and incubation of bottleneck-technologies to accelerate the industrialization of aradiation detection system in the industrial, medical, and radiation security fields. This facility isalso utilized for researchers to develop next-generation radiation detection instruments. In thispaper, the establishment of core-technology development is introduced and its technologicalmission is addressed.

Flame Retardant Composite Foam Modified by Silylated Nanocellulose and Tris(2-chloropropyl) Phosphate

김한수,박주혁,민경서,박성열,이두진,윤재륜,송영석 한국섬유공학회 2019 Fibers and polymers Vol.20 No.11

Improving flame retardancy is one of the most crucial issues to use polymeric materials for building construction. Most of the flame retardant materials containing halogen atoms delay fire spread, but produce harmful gases duringcombustion. Hence, we designed and fabricated a composite foam by using a green nanomaterial. Silylated andnanofibrillated cellulose (Si-NFC) was added to polyurethane foam (PUF) containing tris(2-chloropropyl) phosphate (TCPP)in order to reduce the emission of smoke during combustion. Thermal characteristics of the composite foams wereinvestigated through thermogravimetric analysis, limiting oxygen index (LOI), and cone calorimeter tests. The LOI of the Si-NFC embedded composite was increased from 19.3 % to 24.6 %. In addition, the Si-NFC led to an improvement in thethermal stability of the composites by reducing the peak release of heat and smoke. Chemical structure of the residual charwas analyzed by using energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy.

Radiation Damage to a Charge-sensitive Amplifier for Life-span Estimation

김한수,하장호,박세환,이철호 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.58 No.5

Life-span estimates for charge sensitive amplifiers (CSA) for radiation damage effect are essential to obtain the reliability of a radiation detector system in its radiation environments because a CSA and a radiation sensor are exposed to radiation simultaneously. A hybrid-type CSA was fabricated with electronic components, which are easily obtainable from commercial markets, and its performance was tested. To estimate its life-span, we exposed the CSA to high-dose gamma-rays up to 10^6 Gy. Then, the performance degradations of the fabricated CSA were measured by using the equivalent noise charge (ENC) at various irradiation dose rates. In this paper, the feasibility and radiation damage to the CSA are discussed for life-span estimates.

황해 중부 저층냉수대 해역에서 음향 산란층의 시공간 분포 및 Euphausia pacifica 밀도 추정

김한수,강돈혁,김가람,김미라,최동한 한국수산과학회 양식분과 2020 한국수산과학회 양식분과 학술대회 Vol.2020 No.7

아파트 정보화를 위한 시스템 개발 -개발 시스템의 적용-

김한수 한국주거학회 2001 한국주거학회 논문집 Vol.12 No.3

This study was conducted to develop the Apartment Information System. This integrated information system is designed to provide a large number of users with the convenient, economical, and safe life in the apartment complex. The characteristics of this system are as follows; 1) The system was developed by CAD technology using 2D and 3D methods with Web base. 2) This system has 2-Tire structures which are able to embody the geographic information on the Web base without special Spatial Engine. 3) Since the spatial data applied to this system is a vector file format, the speed of electrical transmission is fast and it makes possible to search spatially for the client method. The results of this study may contribute to make use of the information system for apartment complex as follows; 1) This system can be used together by the communities of apartment residence, maintenance company and construction company. 2) Also this system can help residence to communicate sharing information and can support the apartment management with open information and clarity. Expecially, the practical data gathering was made for this study only.

아파트 단지의 녹지조성에 대한 주민의식과 가상평가법 적용에 관한 연구

김한수,김재홍 한국주거학회 2002 한국주거학회 논문집 Vol.13 No.5

This study is designed to derive a cost estimation method for the management of green areas in apartment housing blocks. For this purpose, quantity of green areas, their usages, management techniques were analyzed through a survey of residents. In this process, contingent valuation method(CVM) is utilized to evaluate the cost of green areas. The survey was conducted for about two weeks in June of 2002. The amount of willingness to pay(WTP) for green area management is calculated by the CVM program. The findings are as follows; First, the residents want more green areas in their apartment blocks, as well as in the surrounding urban areas, due to the shortage of green areas in their living environments. Second, the residents' opinion on green area is summarized as that of natural environment protectionist - it helps living environment to be more amenable and contributes the preservation of urban and global environments. This fact can be interpreted as the peoples profound recognition toward green areas. Third, the contingent valuation method(CVM) is suitable to evaluate WTP for management costs of green areas. Fourth, more than half of the residents(61.6%) agreed upon the costs of green area supply and management. calculated by the CVM. Estimated WTP is ￦ 1,900~2,400 per month per household.

Effect of Temperature on Silicon PIN Photodiode Radiation Detectors

김한수,정만희,김영수,하장호,조승연 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.5

One of the noise sources of a semiconductor radiation detector is thermal noise, which degradesthe performance, such as the energy resolution and unexpected random pulse signals. In this study,PIN photodiode radiation detectors, with different active areas were designed and fabricated for anexperimental comparison of the energy resolutions for different temperatures and capacitances byusing a Ba-133 calibration gamma-ray source. The experimental temperature was approximately inthe range from -7 to 24 C and was controlled by using a peltier device. The design considerationsand the electrical characteristics, such as the I-V and the C-V characteristics, are also addressed.

차량검지기 이력자료 이용자서비스 도입을 위한 기초연구

김한수,남궁성,박동주,백승걸,신승진 한국ITS학회 2007 한국ITS학회논문지 Vol.6 No.2

우리나라는 주로 교통관리 및 교통정보 제공목적으로 다양한 종류의 차량검지기와 CCTV로부터 실시간 교통자료를 수집하고 있다. 실시간 교통자료는 가공과정을 거친 후 반복/비반복 정체관리, 돌발상황관리, 경로안내 서비스 등에 활용되고 있다. 그러나 이와 같은 실시간 활용 이외에는 활용분야가 매우 제한적인 실정이다. 실시간 교통자료는 그 자료를 축적하여 이력자료를 구축하고 이력자료 가공을 통해 정보를 추출한다면 활용분야를 넓힐 수 있다. 최근 미국에서는 실시간 수집자료를 축적하여 이력자료를 구축하고 이용자가 이용할 수 있도록 하는 이력자료 이용자서비스(ADUS; Archived Data User Service)를 도입하였다. 우리나라도 ITS 수집자료의 활용성을 증가시키기 위해 이력자료 이용자 서비스를 도입해야 할 필요가 있다.본 연구에서는 이력자료 이용자서비스 도입을 위해 필요한 서비스 아이템 도출을 연구목적으로 하고 있다. 서비스 아이템 도출을 위해 고속도로를 중심으로 관련연구 및 활용사례를 분석하고 차량검지기 자료의 활용현황을 조사하였다. 이들 분석과 조사결과를 토대로 이력자료 이용자서비스에서 제공할 이력자료 아이템을 선정하였다. 이력자료 수요조사를 통해 이들 아이템의 활용목적 및 용도와 필요건수를 조사함으로써 아이템의 중요도를 파악할 수 있었다. The purpose of this research is to investigate service item to develop archived VDS(Vehicle Detecting System) data user services. Through the review of related studies and literature and investigation of the current application status of the vehicle detector data, the service item from the historical detector data were identified. The relative importance of the identified service item was measured based on the application purpose, usage and frequency of application.

철근에 의한 구속 효과를 고려한 고층건물 콘크리트 슬래브의 건조수축응력 해석

김한수 대한건축학회 2006 大韓建築學會論文集 : 構造系 Vol.22 No.4

Shrinkage strains of concrete slab in multi-story building are restrained internally by reinforcement bar as well as externally by supporting members such as columns or walls. These strains can induce tensile stresses in concrete members and lead to cracks due to excessive shrinkage stress. In this study, a practical method of shrinkage stress analysis on concrete slab in multi-story building is proposed, which considers both internal restraint and external restraint variation resulting from construction sequence. The shrinkage stress due to external restraint is obtained by multiplying relaxation coefficient to elastic shrinkage stress. The additional shrinkage stress due to internal restraint is obtained by residual strain of the elastic analysis. A verification example was analyzed and compared by the proposed method and commercial analysis program that is capable of time-dependent analysis of concrete. The results of 10-story example building show that the internal restraint of reinforcement increases the shrinkage stress considerably at the slabs under loose external restraint.