• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.125-128
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• 2010

리눅스 서버는 웹, FTP, SSH등 여러 가지 서비스를 제공한다. 이러한 서비스를 받는 사용자들이 이것을 이용하여 해킹을 시도하고 있다. 그렇기 때문에 서버 보안에 대한 대책이 필요하다. 본 논문에서는 다중의 리눅스 서버의 대한 각 종 서비스 로그를 분석하여 리눅스 기반이 아닌 윈도우즈 기반에서 다중 리눅스 서버 시스템을 모니터링 및 제어할 수 있는 솔루션을 개발하였다.

• 교육시설
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• 제9권2호
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• pp.15-24
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• 2002

This study is performed to understand a trend of preference about classroom for special purposes related with elementary school relocation. It is anayzed based on the questionnaire of teachers at work in the two schools having similar educational environment. The results showed that it is desirable to locate rooms for science or practice in low story and music room in the lowermost or uppermost story. Rooms for art, linguistic education and computer had not limited any place. It is shown that the scale of each preparation room is significantly different with each grade and more large scale is needed in higher grade. These results reflect that the present arrangement of classrooms for special purposes is not adequate and require more reasonable arrangement with the grade in the architectural plans for relocation-needed elementary schools.

• 생물정신의학
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• 제19권1호
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• pp.60-64
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• 2012

Objectives : This study was designed to investigate the association between the dopamine D2 receptor (DRD2) genetic polymorphism [TaqIB (rs17294542) and TaqID (rs1800498)] and patients with schizophrenia. Methods : TaqIB (rs17294542) and TaqID (rs1800498) polymorphism of the DRD2 gene were typed in 100 patients with schizophrenia and 109 normal controls. Results : There were no statistical differences in genotype and allele distribution of TaqIB (rs17294542) and TaqID (rs1800498) genetic polymorphism between patients with schizophrenia and normal controls. Conclusions : These results suggest that the TaqIB (rs17294542) and TaqID (rs1800498) polymorphisms of the DRD2 gene may not be associated with schizophrenia in the Korean population.

• 한국생산제조학회지
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• 제24권3호
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• pp.314-319
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• 2015

Invar is a compound metal of Fe-Ni system contained 36.5% Ni. The characteristic of invar is that the coefficient of thermal expansion is $1.0{\times}10^{-6}cm/^{\circ}C$. It is approximately 10 times smaller than series of steel. Because of this low thermal expansion characteristic of Invar, it is used to shadow mask of display device such as UHDTV or OLED TV. In this study, pulse current from pulse generator instead of DC current is used to overcome the disadvantages of the conventional electrochemical machining. Pulsed current with different duty factor in PECM affect the precise geometry. Pulse electrochemical machining is conducted to machine the micro hole to the invar sheet with different duty factor. The machined shape and overcut of invar sheet with different duty factor is observed by optical microscope and scanning electron microscope (SEM).

• 한국분말재료학회지
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• 제18권3호
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• pp.256-261
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• 2011

In order to make a $Cu_2ZnSnSe_4$ (CZTSe) sputtering target sintered for solar cell application, synthesis of CZTSe compound by solid state reaction of Cu, Zn, Sn and Se mixed powders and effects of ball milling condition on sinterability such as ball size, combination of ball size, ball milling time and sintering temperature, was investigated. As a result of this research, sintering at $500^{\circ}C$ after ball milling using mixed balls of 1 mm and 3 mm for 72 hours was the optimum condition to synthesis near stoichiometric composition of $Cu_2ZnSnSe_4$ and to prepare sintered pellet with high density relatively.

• Bulletin of the Korean Chemical Society
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• 제25권3호
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• pp.377-381
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• 2004

Chiral separation of aryalcohols such as 1-phenyl-propanol, 1-phenyl-2-proanol, and 2-phenyl-1-propanol by capillary electrophoresis has been optimized using the overlapping resolution mapping (ORM) scheme. Three critical parameters of the electrophoretic media, i.e. phosphate concentration, sulfated ${\beta}$-cyclodextrin (CD) concentration and pH, were chosen for optimization. The working ranges were initially presumed by 7 preexperiments. Further optimization was carried out by another seven experiments within the narrow working ranges. From the final overlapping resolution mapping all peak pairs, the area of maximum separations were located. Using the conditions of a point in this area, we found that the target compounds were a baseline separated within 30 min. The maximum separation conditions of arylalcohols were a chiral selector concentration of 5.4%, a phosphate concentration of 28 mM, and a pH of 5.0.

• 한국환경교육학회지:환경교육
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• 제21권1호
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• pp.31-44
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• 2008

This study was aimed at developing and providing textbook writers with information and materials required to introduce forest education ideas and paradigm into primary, middle, and high school students, responding to establishment of the new national curriculum. Research methods included interview with school teachers, literature review on forest education and policy, analysis of writings and drawings of elementary school students. As a primary result, the study produced a framework that can be applied to analyze and understand how people think of and put a value on forest, consisting of 1) Resource-Economic Perspective, 2) Environmental-Ecological Perspective, 3) Cultural-Educational Perspective, and 4) Existential-Ethical Perspective. To test its validity, the developed framework was applied to the processes of reorganizing and interpreting the outcomes of teacher interview and writings and drawings of elementary school students. The results of applications showed that current school education mostly focused on ecological-environmental (about 50%) and cultural-educational (about 30%) perspectives on forest. To improve the quality of current forest education in schools, five main directions including integration, balance, interrelatedness, identity, and systematic approaches were suggested.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2014년도 제50차 하계학술대회논문집 22권2호
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• pp.181-182
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• 2014

본 논문에서는 현시대의 핵심이슈인 신속성과 유용성에 맞춘 갤러리 카테고라이징 어플리케이션(이하 앱)을 제안한다. 해당 앱은 기존에 모바일 기기에 내재된 갤러리 시스템의 여러 가지 단점들을 파악하여 사용자에게 방대한 양의 사진 파일들을 보다 효율적으로 관리할 수 있는 환경을 제공한다. 또한 외부의 서버를 개인 메모리 공간처럼 사용하는 일종의 클라우드 컴퓨팅 기술을 사용하여 모바일 사진 파일을 동기화한다. 이를 통해 비디오, 음악 등 모바일에서 다루는 고용량의 파일들과 수많은 응용프로그램으로부터 요구되는 메모리 공간으로 인한 모바일 기기의 용량 부족 현상을 완화하고, 모바일 기기의 한정적인 메모리 공간을 보완한다. 시뮬레이션을 통하여 제안하는 갤러리 카테고라이징 기법이 기존의 사용하는 갤러리 시스템에 비해 사진 탐색시간의 효율 면에서 우수함을 확인하였다.

• 사상체질의학회지
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• 제30권3호
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• pp.40-47
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• 2018

Objectives The purpose of this study is to analyze the factors contributing to the classification of Sasang Constitution using Sasang Constitutional Analysis Tool 2. Methods A total of 99 subjects were assessed for the classification of Sasang Constitution using four measurement factors (face, voice, body shape, and questionnaire information) of Sasang Constitutional Analysis Tool 2. Results Taeeumin had significantly higher body weight and BMI. In the result of the agreement between the judgment of the four measurement factors and the final judgment of Sasang Constitution, the agreement degree of Soeumin was the highest value of 2.6. Taeeumin, Soeumin, and Soyangin showed the highest agreement with the individual judgment of face, body shape and questionnaire, and body shape, respectively. Conclusions It is difficult to conclude that any individual factor contributes significantly to the classification of Sasang Constitution. Further study on Sasang Constitutional Analysis Tool 2 involving more peoples is needed in order to determine the factors contributing to the classification of Sasang Constitution.

• 센서학회지
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• 제14권5호
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• pp.337-342
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• 2005

A silicon-based micro-reactor to amplify small amount of deoxyribonucleic acid (DNA) has been fabricated using micro-electro-mechanical systems (MEMS) technology. Polymerase chain reaction (PCR) of DNA requires a precise and rapid temperature control. A Pt sensor is integrated directly in the chamber for real-time temperature measurement and an infrared lamp is used as external heating source for non-contact and rapid heating. In addition to the real-time temperature sensing, PCR needs a rapid thermocycling for effective PCR. For a fast thermal response, the thermal mass of the reactor chamber is minimized by removal of bulk silicon volume around the reactor using double-side KOH etching. The transparent optical property of silicon in the infrared wavelength range provides an efficient absorption of thermal energy into the reacting sample without being absorbed by silicon reactor chamber. It is confirmed that the fabricated micro-reactor could be heated up in less than 30 sec to the denaturation temperature by the external infrared lamp and cooled down in 30 sec to the annealing temperature by passive cooling.