• 한국인터넷방송통신학회논문지
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• 제19권4호
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• pp.105-111
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• 2019

본 논문에서는 근접전계 시험을 수행하여 Ka 대역 밀리미터파 탐색기용 도파관 광벽 슬롯 배열 안테나의 성능 검증을 수행하였다. 슬롯 배열 안테나의 측정은 원전계, 근접전계 시험을 모두 수행하고 비교하여 밀리미터파 대역의 근접전계 시험의 유효성을 확인하였다. 검증을 수행한 슬롯 배열 안테나의 빔폭 및 부엽 준위를 포함한 빔 패턴 특성이 동일함을 확인하였다. 방위각, 고각 빔패턴의 부엽준위 차이는 1dB 이내로 검증되었다. 추가로 back-projection 기법을 활용하여 근접전계 데이터를 가공한 후 안테나 개구면의 분포를 새롭게 추출하여 배열 안테나 성능 분석을 수행하는 방법에 대하여 소개하였다.

• 무역상무연구
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• 제55권
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• pp.243-264
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• 2012

This study is aimed to analyze problems related to FTA country of origin of goods verification which is increasing from 2006 and thereby to grope for solution of such problems and seek adequate FTA performance administration. It is found, through comparative analysis and statistics of last 8 FTAs so far Korea has concluded that there are major problems such as excessive verification processing due to complicated country of origin regulation etc. This paper suggests following policies of country of origin administration ; (1) Simplification of FTA country of origin rules (2) reciprocal cooperation between each country's Customs Authorities based on trust (3) rational measurement against corresponding country's Customs Authorities' misbehavior (4) enhancement of transparency in relation to processing rule of country of origin verification (5) securing FTA country of origin verification experts. For these improvements, upcoming FTA shall rule country of origin reasonably, simplification and transparency of rule is needed for established FTAs in relation to FTA performance administration with corresponding countries. Also it is necessary to revise FTA preferential tariff law and its related laws, and carry forward policies in accordance with medium and long term plan.

• 한국군사과학기술학회지
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• 제14권1호
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• pp.15-21
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• 2011

In this paper, the results of experimental analysis for the chemical composition and strengh verification of Bailey Panel Bridge have been presented. Some of main sections of bailey bridge colllected from military engineer troops were prepared for the chemical composition and strengh verification. The composition test and strength verification were conducted by using the optical microscope and Scanning Electron Microscope(SEM), Automatic Control Spark Emission Spectrometer(OBLF), X-ray Fluorescence Spectroscopy(XRF) and Instron measurement. The results showed that currently used sections of bailey bridge passed the strength verification and could be operated in drill of troops and battle fields.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.164-167
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• 1997

The treatment setup of patients during irradiation is an important aspect in relation to the success of radiotherapy. Imaging with the treatment beam is a widely used method or verification of the radiation field position relative to the target area, prior to or during irradiation. In this paper, Real time digital radiography system was implemented or verification of local error between simulation plan and radiation therapy machine. Portal image can be acquired by CCD camera, image board and pentium PC after therapy Radiation was converted into light by a metal/fluorescent Screen. The resulting image quality is comparable to film, so the imaging system represents a promising alternative to film as a method of verifying patient positioning in radiotherapy. Edge detection and field size measurement were also implemented and detected automatically for verification of treatment position. Field edge was added to the original image or checking the anatomical treatment verification by therapy technicians. By means of therapy efficiency improvement and decrease of Radiation side effects with these techniques, Exact Radiation treatments are expected.

• Journal of Platform Technology
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• 제9권1호
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• pp.32-39
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• 2021

기존 환경측정기기는 전자파 및 친환경 제품 인증, 내구성 시험 위주이며, 센서 신뢰성 검증 및 측정 데이터에 대한 검증은 형식 승인 및 등록, 인수시험, 초기교정, 주기시험 등을 통해 센서 성능평가 위주로 수행된다. 본 플랫폼은 각 타겟 센서별 성능평가 뿐만 아니라 센서의 데이터 신뢰성에 대한 검증체계 지원 ICT 기반 환경 모니터링 센서 신뢰성 검증 체계를 구축하였다. 환경 정보에 대한 센서 데이터를 수집할 센서보드를 제작하였고 센서 및 데이터 신뢰성 평가 및 검증 서비스 체계를 규격화 하였다. 또한, ICT 기반 센서 데이터 신뢰성 평가 및 검증을 위해 LoRa 통신을 이용한 센서 데이터 플랫폼 모니터링 프로토타입을 제작하였고 이를 스마트 시티 등에 실증 테스트하였다. 해당 시스템을 통해 받은 데이터 분석을 위해 머신러닝을 이용하여 최적화 알고리즘 개발하였다. 이를 통해 신뢰성 검증을 위한 센서 빅데이터 분석시스템을 구축하였고 통합 평가 및 검증 시스템의 기반을 마련하였다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권9호
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• pp.403-406
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• 2005

Precise measurement of extremely low resistance shunt is important for characterization and calibration of high current instruments. We tested resistance measurement method for extremely high current shunt (up to 140 kA), where resistance is determined by precise measurement of voltage drop at 10 A test current in the frequency range of 40 Hz to 10 kHz. For the extremely low ac voltage to be precisely measured, a verification of the measurement method was also carried, where the inherent noise is systematically evaluated. The measurement uncertainty was estimated to be $1\;\%\;at\;95\;\%$ confidence level (k=2) for about 50 $\mu\Omega$.

• 한국철도학회논문집
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• 제5권3호
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• pp.158-166
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• 2002

In this paper, we introduce the software and hardware of the measurement system for on-line testing and evaluation of high speed railway. The test items focus on the verification of the performance and acquirement of the technical data of the high speed railway system. The software controls the hardware of the measurement system, perform the analysis and calculation of measurement data and acts as interface between users and the system hardware. For this purpose, three programs a measuring program, a monitoring program and post-processing program are developed. The detailed test scenario is in the process of development to closely follow the process of development and design of the system.

• 소성∙가공
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• 제13권7호
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• pp.594-599
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• 2004

In the sheet metal forming operations, the strain measurement of sheet panel is an essential work which provides the formability information needed in die design, process design, and product inspection. To measure efficiently complex geometry strains, the 3-dimensional automative strain measurement system, which theoretically has a high accuracy but practically has about 3～5％ strain error, is often used. For eliminating the strain error resulted in measuring the strains of formed panels using an automated strain measurement system, the position error calibration method is suggested, which computes accurate strains using the grids with accurate nodal coordinates. The accurate nodal coordinates are calculated by adding the nodal coordinates measured by the measurement system and the position error found using the multiple regression method as a function of the main error parameters obtained from the analysis of strain error in a standard cube. For the verification, the strain distributions of square and dome cups obtained from the position error calibration method are compared with those provided by the finite element analysis and ASAME.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 추계종합학술대회 B
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• pp.119-122
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• 2008

사람의 심박동은 심장 상태와 구조, 나이 등의 여러 요소에 의하여 고유한 특성을 갖는다. 본 논문에서는 심박동의 고유 특성을 이용한 개인 인증 방법을 제안하였다. 이 고유 특성은 LD와 PD를 이용, 광전용적맥파(PPG, Photo Plethysmogram)를 측정함으로서 얻었다.

• Nuclear Engineering and Technology
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• 제55권9호
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• pp.3140-3149
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• 2023

In theory, the sharp dose falloff at the distal end of a proton beam allows for high conformal dose to the target. However, conformity has not been fully achieved in practice, primarily due to beam range uncertainty, which is approximately 4% and varies slightly across institutions. To address this issue, we developed a new range verification system prototype: a multi-slit prompt-gamma camera (MSPGC). This system features high prompt-gamma detection sensitivity, an advanced range estimation algorithm, and a precise camera positioning system. We evaluated the range measurement precision of the prototype for single spot beams with varying energies, proton quantities, and positions, as well as for spot-scanning proton beams in a simulated SSPT treatment using a phantom. Our results demonstrated high accuracy (<0.4 mm) in range measurement for the tested beam energies and positions. Measurement precision increased significantly with the number of protons, achieving 1% precision with 5 × 10⁸ protons. For spot-scanning proton beams, the prototype ensured more than 5 × 10⁸ protons per spot with a 7 mm or larger spot aggregation, achieving 1% range measurement precision. Based on these findings, we anticipate that the clinical application of the new prototype will reduce range uncertainty (currently approximately 4%) to 1% or less.