대학수학능력시험 수험생들의 한의과대학 진학 동기 및 한의의료에 대한 인식 조사

김현석,김휘문,김현호,Kim, Hyun-Seok,Kim, Hwimun,Kim, Hyunho 대한예방한의학회 2019 대한예방한의학회지 Vol.23 No.2

Objectives : The study was aimed to analyze the College Scholastic Ability Test (CSAT) test-takers' favor of entering Korean Medicine college and their perception toward the Korean Medicine. The study will present information that can be used for university administrator and in medical education field. Methods : A questionnaire was developed, comprising categories about the favor of entering Korean Medicine college, the experience and reason of receiving Korean Medicine healthcare treatment, and the perception toward the Korean Medicine. Face validity and content validity of the developed questionnaire were tested before survey. Then the questionnaires were distributed to 168 CSAT test-takers. Results : The most positive reason of entering Korean Medicine college is the characteristic of job, while the negative one is of the characteristic of the discipline. Respondents who answered as positive toward Korean Medicine are more than those who answered as negative. The most positive reason of receiving Korean Medicine healthcare treatment and perceiving Korean Medicine positively is because of its medical effectiveness. The most negative reason is responded as et cetera in both categories. Conclusions : The results of the survey may indicate that by promoting recent research progresses in Korean Medicine and benefits from choosing a career as medical professions, more CSAT test-takers will have positive attitude toward Korean Medicine college entrance. Also by promoting the medical effectiveness of Korean medicine to CSAT test-takers, more CSAT test-takers will receive or have positive attitude toward Korean Medicine healthcare service.

위상 이미지 상관기법을 이용한 시준거울의 자동정렬

김현석,김대석,이형철,김수현,Kim, Hyun-Suk,Tserendolgor, D.,Kim, Dae-Suk,Lee, Hyung-Chul,Kim, Soo-Hyun 한국광학회 2011 한국광학회지 Vol.22 No.1

본 연구에서는 현재 대부분 작업자에 의해 수동으로 이루어지고 있는 단색화장치 내 광학 요소간 광학정렬을 높은 반복도와 고속으로 수행할 수 있는 자동화 방안에 대해 논의하고자 한다. 단색 분광기의 시준거울 자동정렬을 위해 CCD센서를 이용한 위상이미지 상관기법을 핵심기술로 사용하였다. 실험결과 약 10초 내에 시준거울을 정밀하게 자동정렬 할 수 있다. A novel alignment method that can be used for aligning the collimating mirror employed in a monochromator is described. In most of the spectrometer industry, the alignment of optical components such as a focusing mirror, a grating and a collimating mirror has been performed manually so far. In this paper, we use a matchedfilter based image correlation technique for measuring the accurate image position which is used for aligning the collimating mirror. The experimental results show that with the proposed scheme automatic alignment can be completed within 10 seconds.

정형검증을 통한 RFID 보안프로토콜 분석 및 구현

김현석,김주배,한근희,최진영,Kim, Hyun-Seok,Kim, Ju-Bae,Han, Keun-Hee,Choi, Jin-Young 한국정보과학회 2008 정보과학회논문지 : 시스템 및 이론 Vol.35 No.7

Radio Frequency Identification(RFID: 무선주파수식별) 기술은 유비쿼터스 구조 기술의 중요한 한 부분을 이루고 있다. 태그를 이용한 모든 제품들이 이러한 서비스의 대상이 되고 있지만 불행히도 다방면에 이용되는 이면에는 사용자의 사생활과 사용자 및 판매자간의 인증문제를 이용한 서비스 공격의 대상이 되고 있다. 현재 이러한 RFID 시스템의 보안 메커니즘들은 이슈화되고 있으며 본 논문에서는 여러가지 메커니즘들 중 사생활 및 인증문제 해결을 위해 정형검증을 통한 보안프로토콜 분석 및 취약성을 수정한 프로토콜을 제안하고자 한다. 또한 제안된 프로토콜의 실현가능성을 위한 구현가능성을 언급하고자 한다. Radio Frequency Identification (RFID) technology is an important part of infrastructures in ubiquitous computing. Although all products using tags is a target of these services, these products also are a target of attacking on user privacy and services using authentication problem between user and merchant, unfortunately. Presently, it is very important about security mechanism of RFID system and in this paper, we analyze the security protocol among many kinds of mechanisms to solve privacy and authentication problem using formal verification and propose a modified novel protocol. In addition, the possibility of practical implementation for proposed protocol will be discussed.

현대화를 지향하는 중국의 타이어 산업

김현석,Kim, Hyeon-Seok 대한타이어공업협회 1999 타이어 Vol.199 No.-

레이저 관성항법장치 초기정렬 성능 분석

김현석,김천중,이태규,Kim, Hyun-Seok,Kim, Cheon-Joong,Lee, Tae-Gyoo 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.5

Laser Inertial Navigation System(LINS) consists of Ring Laser Gyroscopes(RLG) and accelerometers. RLG has a lock-in region in which there is zero output for input angular rates less than about 0.1deg/sec. The lock-in region is generated by the imperfect mirrors in RLG. To avoid the lock-in region, a sinusoidal motion called dither motion is applied on RLG. Therefore this dither motion is measured by RLG/accelerometer even if at a stop state. In this situation, the performance on the initial alignment of LINS can be degraded. In this paper, we analyze the performance on the initial alignment of LINS theoretically and experimentally. Analysis results include how dither motion, the pre-filter and the corner frequency in alignment loop affects the performance on the initial alignment of LINS.

방사성요오드 치료전 갑상선유두암 환자의 인지기능

김현석,전진숙,김민수,최영식,오병훈,Kim, Hyun Seuk,Cheon, Jin Sook,Kim, Min Su,Choi, Young Sik,Oh, Byoung Hoon 한국정신신체의학회 2013 정신신체의학 Vol.21 No.2

연구목적 본 연구는 갑상선암 환자에서 인지장애의 발생 빈도와 이에 관계되는 변인을 규명하기 위하여 시행되었다. 방 법 갑상선암으로 진단받고 갑상선전절제술 받은 지 6~12개월 후, 방사성요오드 잔여갑상선제거술을 받기 위해서 입원한 환자 42명을 대상으로 개인력, 병력조사와 우울지수 및 인지기능(Korean Version of the Montreal Cognitive Assessment, 이하 MoCA-K)의 평가를 시행하였다. 결 과 1) 대상 환자 중 MoCA-K 총점이 22점 이하인 환자는 21명(50.0%)이었다. 2) 나이, 교육수준, 방사성 요오드 치료 전 갑상선자극호르몬 농도는 MoCA-K 총점 23점 이상군과 MoCA-K 총점 22점 이하군 간에 통계적으로 유의한 차이가 있었다. 3) MoCA-K 총점과 통계적으로 유의한 연관성이 있는 변인은 나이, 교육수준, 병행질환, 방사성 요오드 치료 전 갑상선자극호르몬 농도, HDRS-17 총점이었다. 결 론 갑상선절제술 후 방사성 요오드 치료를 받기 전 갑상선암 환자에서 인지장애는 50%에서 있었다. 추후, 치료과정의 갑상선암에서 인지장애의 기전을 규명하기 위한 연구가 더 필요하며, 치료 과정의 환자에서 인지장애의 인식과 예방 대책이 요구된다. Objectives: The aims of this study were to know the prevalence of cognitive disorders in patients with thyroid cancer, and identify related variables to them. Methods: Subjects were consisted of fourty-two patients with thyroid cancer, who were admitted for radioiodine ablative therapy at 6-12 months after total thyroidectomy. The data were obtained from interviews about history and assessments of depression and cognitive function(Korean Version of the Montreal Cognitive Assessment, MoCA-K). Results: 1) Among subjects, those with below 22 of total score of the MoCA-K were twenty-one(50.0%). 2) Upon age, education, Pre-radioiodine therapy thyroid stimulating hormone(TSH), there were statistically significant difference between subgroup with above 23 of the total MoCA-K score and those below 22. 3) The total scores of the MoCA-K in subjects had significant correlation with age, education, comorbidity, Pre-radioiodine therapy TSH, total score of the HDRS-17. Conclusions: Cognitive disorders were more prevalent among patients with thyroid cancer before radioiodine therapy. Therefore, further study should be needed to clarify the mechanism for the cognitive disorders in thyroid cancer. Furthermore, physicians should pay attention to the cognitive function and prepare preventative measures for cognitive disorder during management of thyroid cancer.

GC-TSQ CI 분석법을 이용한 제32차 OPCW 숙련도 시험 시료 분석 연구

김현석,정창희,이용한,Kim, Hyunsuk,Jung, Changhee,Lee, Yonghan 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.6

GC-TSQ CI technique was applied for analysis of samples for the $32^{nd}$ OPCW proficiency test. Eight chemical weapon convention(CWC) related chemicals were identified by product ion mode analysis with GC-TSQ in the samples. Choice of specific precursor ion made it possible to supply selective total ion chromatograms(TICs) of target molecule. GC-TSQ CI anaylsis technique was useful method for chemical warfare agent verification because analysis selectivity was improved by choice of mother molecule as precursor ion and gave mass spectra.

신뢰성 기반 최적설계를 이용한 130m급 고정식 해양구조물 최적설계 개발

김현석,김현성,박병재,이강수,Kim, Hyun-Seok,Kim, Hyun-Sung,Park, Byoungjae,Lee, Kangsu 한국전산구조공학회 2021 한국전산구조공학회논문집 Vol.34 No.5

본 연구에서는 환경, 재료 물성 및 제작 등에서의 불확실성을 고려하여 130m급 고정식 해양구조물의 신뢰성 기반 최적설계를 수행하였다. 구조물의 구조건전성을 엄밀하게 반영하기 위해 작용 및 허용 응력의 비인 UC 값을 신뢰성 해석 및 신뢰성 기반 최적설계의 제약조건으로 고려하였다. 해양구조물의 제작비용을 저감하기 위해 자켓형 지지구조물의 중량을 최소화하였다. 불확실성의 통계적 특성은 문헌 등을 참고하여 관측되거나 측정된 데이터를 기반으로 정의하였다. 자켓형 해양구조물의 신뢰성 해석과 신뢰 기반 최적설계는 부재 수가 많아 계산 부담이 큼으로 문제의 차원을 축소하기 위해 응답의 중요성을 기준으로 설계변수를 선별할 수 있는 방법을 제안한다. 또한 효율적인 계산을 위해 신뢰성 기반 최적설계를 수행하기 전 결정론적 최적설계를 먼저 수행하였다. 마지막으로, 도출된 최적설계(안)을 기존 각 급 규정 기반 설계와 안전성 및 경제성 측면에서 비교 분석하였다. In this study, a reliability-based design optimization of a 130-m class fixed-type offshore platform, to be installed in the North Sea, was carried out, while considering environmental, material, and manufacturing uncertainties to enhance its structural safety and economic aspects. For the reliability analysis, and reliability-based design optimization of the structural integrity, unity check values (defined as the ratio between working and allowable stress, for axial, bending, and shear stresses), of the members of the offshore platform were considered as constraints. Weight of the supporting jacket structure was minimized to reduce the manufacturing cost of the offshore platform. Statistical characteristics of uncertainties were defined based on observed and measured data references. Reliability analysis and reliability-based design optimization of a jacket-type offshore structure were computationally burdensome due to the large number of members; therefore, we suggested a method for variable screening, based on the importance of their output responses, to reduce the dimension of the problem. Furthermore, a deterministic design optimization was carried out prior to the reliability-based design optimization, to improve overall computational efficiency. Finally, the optimal design obtained was compared with the conventional rule-based offshore platform design in terms of safety and cost.

선박해양플랜트연구소 친환경연료추진연구본부

김현석,Kim, Hyeon-Seok 한국전산구조공학회 2022 전산구조공학 Vol.35 No.3

중국의 타이어 산업

김현석,Kim, Hyeon-Seok 대한타이어공업협회 2000 타이어 Vol.205 No.-