• 한국전자파학회논문지
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• 제28권5호
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• pp.426-429
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• 2017

W-대역 원격탐사용 라디오미터 구현을 위하여 direct detection 방식의 구조를 가지는 수신기를 설계하였으며, 통신 또는 레이다 수신기 구조와 다르게 저 잡음이면서 60 dB 이상의 고이득을 가지도록 제작하였다. 라디오미터 수신기는 W-대역에서 동작하는 4단의 고이득 저잡음 증폭기와 대역폭 필터, square law detector로 구성되었으며, 제작된 연구 결과를 제시하였다. 개발된 direct detection 수신기는 94 GHz의 입력 주파수와 약 4 GHz의 대역폭, 그리고 56 dB 이득과 입력신호가 -20 dBm 경우 적분기 출력단에서 4,500 mV/mW의 감도를 보여주고 있다.

• Journal of Mechanical Science and Technology
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• 제17권11호
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• pp.1674-1681
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• 2003

Photoelastic experiment has two significant problems. The first problem is manufacturing a model specimen for complicated shapes of structures. The second problem is residual stress contained in the photoelastic model material. In this paper, the stress optic law that can be effectively used on photoelastic model materials with residual stress is developed. By using the stress optic law as developed in this research, we can obtain good results in photoelastic experiments using model material in which residual stress is contained. It is assured that the stress optic law developed in this research is useful. Therefore, it is suggested that the stress optic law considering residual stress can be applied to the photoelastic experiment for the stress analysis of the composite materials or bi-materials in which the residual stress is easily contained.

• 기술혁신학회지
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• 제17권1호
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• pp.95-123
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• 2014

최근 과학기술의 사회적 역할이 증대되는 한편 창조경제의 실현 등 혁신주도형 과학기술정책으로의 패러다임 전환에 효율적으로 대응하기 위해서는 과학기술 관련 법제들의 체계적인 정비가 필요하다. 특히, 과학기술기본법은 국가과학기술정책 추진에 관한 기본규범이자 총괄규범으로서 이와 같은 시대 및 환경의 변화에 맞도록 그 체계와 내용을 발전적으로 재정비할 필요가 있다. 현행 과학기술기본법은 2001년 1월 제정된 이후 수차례에 걸쳐 개정되어 현재에 이르고 있다. 그러나 그동안의 개정은 정부조직개편 및 과학기술정책 심의조정기구의 운영체계변화 등에 따른 것이 중심이 되었으며, 변화된 환경 및 시대적 요구에 따른 정책사항들을 종합적으로 반영하는 데는 미흡하였다. 이에 본 연구에서는 현행 과학기술기본법이 시대와 환경의 변화에 적합한 정책총괄규범으로서 역할과 기능을 수행하도록 하기 위하여 필요한 개정 방안을 검토 제시하였다. 연구 결과 현행 과학기술기본법은 법체계적인 측면에서 기본법으로서의 위상에 걸맞도록 장 절 체계를 확대 재정비하고, 규율내용적인 측면에서는 규범내용의 포괄성, 규범집행의 실효성, 총괄규범으로서 개별법령과의 연계성 및 기본법으로서의 정합성이 확보되도록 관련 규정을 신설하거나 보강하는 것이 필요한 것으로 분석되었다.

• 대한방사선기술학회지:방사선기술과학
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• 제44권5호
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• pp.545-554
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• 2021

According to the changes of the medical environment of the times, it is necessary to discuss the issues of the doctor's medical guidance and to conduct continuous research so that alternatives can be prepared systematically. Furthermore, in order to enhance the professionalism of radiological technologists and to develop the medical technician system, the new Radiological Technologist Independent Act has been established, which contains the overall contents of the scope of work, professional qualifications, and specialized education of radiological technologists, and provides quality medical services to patients through professional procedures and treatment. In order to increase the level of medical care, the purpose, definition, mission, role, and scope of work specified in the Medical Act, Medical Service Technologists, etc. Act, the Enforcement Decree, and the Enforcement Rules were variously analyzed and new directions were presented. First, the definition of a medical technician should use a generic term so that the factors of conflict and prejudice could be resolved. Second, change the doctor's guide to doctor's prescription; and then legislate the authority to sign and write medical records after examination by radiological technologists, thereby prohibiting unlicensed technicians that seriously endanger patient safety. Third, an accurate definition of radiological technologists' roles should be established; not only selection and management of radiological technologists' work but also procedures and treatment for each radiology field should be specified to suit the current medical system. Fourth, a professional radiological technologists' qualification system and a specialized education system should be established in order to secure human resources that could provide patients trust in procedures and treatment based on professional knowledge and experience in the field of radiology. Fifth, the Education and Evaluation Institute should be operated in Korea education system to educate the professional knowledge and competency for students. In addition, it is necessary to in-depth analysis of foreign cases could be applied to the medical system and education system in Korea; it could strive to nurture systematic human resources.

• Journal of Information Science Theory and Practice
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• 제4권3호
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• pp.71-83
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• 2016

Purpose. The purpose of this paper is to analyze and evaluate discovery layer search tools for retrieval of legal information in Indian law libraries. This paper covers current practices in legal information retrieval with special reference to Indian academic law libraries, and analyses its importance in the domain of law.Design/Methodology/Approach. A web survey and observational study method are used to collect the data. Data related to the discovery tools were collected using email and further discussion held with the discovery layer/ tool /product developers and their representatives.Findings. Results show that most of the Indian law libraries are subscribing to bundles of legal information resources such as Hein Online, JSTOR, LexisNexis Academic, Manupatra, Westlaw India, SCC web, AIR Online (CDROM), and so on. International legal and academic resources are compatible with discovery tools because they support various standards related to online publishing and dissemination such as OAI/PMH, Open URL, MARC21, and Z39.50, but Indian legal resources such as Manupatra, Air, and SCC are not compatible with the discovery layers. The central index is one of the important components in a discovery search interface, and discovery layer services/tools could be useful for Indian law libraries also if they can include multiple legal and academic resources in their central index. But present practices and observations reveal that discovery layers are not providing facility to cover legal information resources. Therefore, in the present form, discovery tools are not very useful; they are an incomplete and half solution for Indian libraries because all available Indian legal resources available in the law libraries are not covered.Originality/Value. Very limited research or published literature is available in the area of discovery layers and their compatibility with legal information resources.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2007년도 High Temperature Superconductivity Vol.XVII
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• pp.4-4
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• 2007

• Nuclear Engineering and Technology
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• 제54권12호
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• pp.4759-4775
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• 2022

The RVACS is a versatile and robust safety system driven by two natural circulations: in-vessel coolant and ex-vessel air. To observe interaction between the two natural circulations, SINCRO-IT facility was designed with two different similarity laws simultaneously. Bo' based similarity law was employed for the in-vessel, while Ishii's similarity law for the ex-vessel excluding the radiation. Compared to the prototype, the sodium and air system, SINCRO-IT was designed with Wood's metal and air, having 1:4 of the length reduction, and 1.68:1 of the time scale ratio. For the steady state, RV temperature limit was violated at 0.8% of the decay heat, while the sodium boiling was predicted at 1.3%. It showed good accordance with the system code, TRACE. For an arbitrary re-criticality scenario with RVACS solitary operation, sodium boiling was predicted at 25,100 s after power increase from 1.0 to 2.0%, while the system code showed 30,300. Maximum temperature discrepancy between the experiments and system code was 4.2%. The design and methodology were validated by the system code TRACE in terms of the convection, and simultaneously, the system code was validated against the simulating experiments SINCRO-IT. The validated RVACS model could be imported to further accident analysis.

• KNOM Review
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• 제21권2호
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• pp.18-25
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• 2018

사토시 나타모토에 의해 블록체인 기술이 개발되고 비트코인이 새로운 암호화폐 시장을 개척한 이후 여러 암호 화폐들이 등장하고 그 수와 규모는 나날이 증가하고 있다. 또한 블록체인 기술의 익명성과 여러 취약점을 이용한 범죄들이 발생하고 있으며 이에 취약점 개선과 범죄 예방을 위한 많은 연구들이 진행되고 있으나 범죄를 저지르는 사용자들을 탐지해내기엔 역부족이다. 따라서 네트워크 내 자금 세탁, 자금 탈취 등 이상 행위를 탐지 하는 것은 매우 중요하며 이에 본 논문에서는 비트코인 네트워크의 트랜잭션 및 유저 그래프의 특징들을 수집하고 이로부터 통계정보를 추출한 후 이를 로그 스케일 상에서 플롯으로 나타낸다. 시각화된 플롯을 Densification Power Law와 Power Degree Law에 따라 분석하고 결과적으로 비트코인 네트워크 내 비정상 트랜잭션 및 비정상 유저를 포함하는 이상 탐지에 적절한 특징들을 제시한다.

• 정보관리연구
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• 제42권2호
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• pp.1-21
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• 2011

저작권법은 저작권 소유자의 권리와 이용자의 권리 간에 균형을 유지함으로써 지식정보에 대한 접근을 촉진하는 최선의 법적 도구이다. 이러한 측면에서 도서관을 위한 저작권의 제한 및 예외는 학습과 연구를 지원하고 정보의 흐름을 촉진하며, 대중에게 공정한 정보접근을 제공하고 지적 문화유산을 보존하는 데 중요하다. 이에 본 연구는 국내 저작권법의 도서관관련 권리제한조항을 축조분석하여 도서관 보관자료의 보존 및 제공용 복제, 도서관에서 인터넷 정보의 출력과 송신, 재생수단의 입수가 곤란한 자료 및 정부간행물의 보존용 복제와 제공, 장애인을 위한 도서관의 복제와 공중송신에 대한 개선방안을 제시하고 공정이용을 위한 일반규정의 도입방안을 제안하였다.

• Advances in aircraft and spacecraft science
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• 제9권3호
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• pp.243-261
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• 2022

Broad writing on the examination of sandwich structures mirrors the significance of incorporating thermal loadings during their investigation stage. In the current work, an endeavor has been made to concentrate on sandwich FGM beams' bending behaving under thermal loadings utilizing shear deformation theory. Temperature-dependent material properties are used during the analysis. The formulation includes the transverse displacement field, which helps better predict the behavior of thick FGM beams. Three-different thermal profiles across the thickness of the beam are assumed during the analysis. The study has been carried out on both symmetric and unsymmetric sandwich FGM beams. It has been observed that the bending behavior of sandwich FGM beams is impacted by the temperature profile to which it is subjected. Power-law exponent and thickness of core also affect the behavior of the beam.