가축분뇨 Biochar의 물리·화학적 특성분석을 통한 흡착제 적용성 평가 연구

이영진,오민아,박경주,이재영,Lee, Youngjin,Oh, Minah,Park, Kyoungjoo,Lee, Jai-young 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.2

As livestock husbandry has broadened from family-scale to enterprise-scale, the number of farming families has decreased in contrast to the increase of the number of livestock, and the amount of livestock manure discharged per household has increased. Livestock manure is difficult to handle and its disposal in the ocean is prohibited. Moreover, facilities that compost and liquefy manure are blamed as sources of soil, ground water, and surface water pollution because the amount of manure generated from husbandry farms causes eutrophication. In this study, livestock manure was utilized as a feedstock of hydrothermal carbonization (HTC) process to produce biochar for use as an environmental medium. The biochar was tested for iodine adsorption capability and its performance was compared with other adsorbent materials.

에어셀을 이용한 손목 재활훈련 장치

이영진,정유진,구교인,지영준,Lee, Youngjin,Jeong, Yujin,Koo, Kyo-In,Chee, Youngjoon 대한의용생체공학회 2015 의공학회지 Vol.36 No.2

In this paper, we propose a wrist rehabilitation training device using pneumatic inflation and deflation of air cells. By alternating inflation and deflation of upper and lower air cells, the device makes the flexional and extensional movement for wrist rehabilitation. With the angular displacement sensor, it measures the flexion-extension angle of the wrist during the training and the bending angle is used for the automatic control of the device. Using the sensor output, the regression equation was obtained to measure the bending angle of the wrist from a wrist rehabilitation training device. The measurement error of the device was evaluated by comparing the measurement output with the angle from the photograph. The measurement error of wrist bending angle between the sensor and photo was $3.2^{\circ}$ in average. With additional test and improvement, the pneumatic wrist rehabilitation training device might be used for rehabilitation training.

원통 봉을 적용한 압전 캔틸레버의 성능 향상

이영진,김세기,김영득,Lee, Youngjin,Kim, Seiki,Kim, Young-Deuk 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.5

This paper describes the development of a new piezoelectric unimorph cantilever structure intended to improve electrical output power, compared to a conventional cantilever. The proposed structure employs a cylindrical bar attached to one side of a steel plate, which is a significant factor in forced vibration mode. The feasibility of the proposed methodology was assessed experimentally and theoretically. The influence of three different types of bar material (i.e., stainless steel, silicon rubber, and urethane), and bar position, on the output voltage were examined and compared with those without the bar. The optimal position and material for the bar were identified through experimental and theoretical analyses. It appears that the electrical output power of the proposed cantilever is about 40% higher than that of a conventional unimorph cantilever.

수중 TCE 분해용 압전 초음파 트랜스듀서 개발

이영진,Lee, Youngjin 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.11

This paper describes the development of a piezoelectric flextensional transducer, which aims to effectively degrade the TCE contained in aqueous solution. In order to adjust the 1st flextensional resonant frequency and output displacement of the flextensional transducer, the effect of the geometrical variations on performance was analyzed using the finite element analysis (FEM). The results indicated that the effect of external shell's thickness and curvature were most significant, and experimental fabrication and characterization of a transducer was performed to confirm the results. To prove the capacity to degrade the TCE contained in aqueous solution, 50 and 100 ppm of TCE were prepared in sealed chamber, and investigated the removal rate of TCE through the time and initial concentration.

재난에 대한 인식이 정부신뢰에 미치는 영향

이영진,Lee, Youngjin 한국방재안전학회 2020 한국방재안전학회 논문집 Vol.13 No.4

본 연구는 한국인의 사회재난에 대한 위험인식 수준이 정부에 대한 신뢰에 미치는 영향을 알아보고자 하였다. 이를 위해 사회재난 유형에 따른 재난위험 인식 수준 차이와 사회재난 위험인식 수준이 정부신뢰에 미치는 영향을 분석하였다. 예비조사에서 위험성 정도가 높은 3개 사회재난 유형(조류독감, 미세먼지, 핵발전소)을 추출하였으며, 본 조사는 20세 이상 한국인 성인 남녀 1,109명을 대상으로 실시하였다. 분석결과, 첫째, 사회재난 인식 수준은 사회재난 유형에 따라 차이가 있는 것으로 나타났다. 둘째, 사회재난에 대한 자발성, 개인적 지식, 친숙도, 심각성, 두려움, 회복가능성 위험은 정부신뢰에 영향을 미치지 않는 것으로 나타났다. 셋째, 사회재난에 대한 지연성 위험 인식은 정부신뢰에 긍정적인 영향을 미치는 것으로 나타났다. 넷째, 사회재난에 대한 과학적 지식, 통제가능성, 치명성, 발현시기 위험 인식은 정부신뢰에 부정적인 영향을 미치는 것으로 나타났다. 결론에서는 본 연구의 시사점 및 한계점을 서술하였다. This study aimed to investigate the effects of social disaster risk perception levels of Koreans on government trust. To this end, differences in disaster risk perception levels based on social disaster types and the effects of social disaster risk perception levels on government trust were analyzed. In the preliminary survey, three types of social disasters with high risk levels (bird flu, fine dust, and nuclear power plants) were selected. The survey was conducted on 1,109 Korean men and women aged 20 years and older. First, the analysis results demonstrated that social disaster perception levels differed based on social disaster types. Second, the results showed that, in terms of social disasters, proactivity, personal knowledge, familiarity, severity, fear, and risk associated with chances of recovery did not affect government trust. Third, the perception of delayed social disaster risk had a positive effect on government trust. Fourth, scientific knowledge about social disasters, control capabilities, lethality, and risk perception at the onset time had a negative effect on government trust. In conclusion, the implications and limitations of this study were discussed.

Investigation to design of ultra-high-resolution parallel-hole collimator with CdTe photon counting detector

Youngjin Lee(이영진),Hee-Joung Kim(김희중),Yong-Gu Lee(이용구),Haenghwa Lee(이행화),Sunghoon Choi(최성훈),Byungdu Jo(조병두),Jong Seok Kim(김종석),Se Young Bae(배세영),Mi Hee Lee(이미희),Se Hee Han(한세희) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6

간 초음파 영상에서의 스페클 노이즈 제거를 위한 필터들의 비교 평가

김하진(Hajin Kim),이영진(Youngjin Lee) 대한방사선과학회(구 대한방사선기술학회) 2023 방사선기술과학 Vol.46 No.6

This study aimed to compare filters for reducing speckle noise in ultrasound images using clinical liver images. We acquired the clinical liver ultrasound images, and noisy images were obtained by adding 0.01, 0.05, 0.10, and 0.50 intensity levels of speckle noise to the liver images. The Wiener filter, median modified Wiener filter, gamma filter, and Lee filter were designed for the noisy images by setting window sizes at 3×3, 5×5, and 7×7. The coefficient of variation (COV) and contrast to noise ratio (CNR) were calculated to evaluate noise reduction and various filters. Moreover, the fil- ter with the highest image quality was selected and quantitatively compared to a noisy image. As a result, COV and CNR showed the noise improved result when the Lee filter was applied. Furthermore, the Lee filter image with a window size of 7×7 was noted to possess approximately a minimum of 1.28 to a maximum of 3.38 times better COV and a minimum of 2.18 to a maximum of 5.50 times better CNR than the noisy image. In conclusion, we confirmed that the Lee filter was effective in reducing speckle noise and proved that an appropriate window size needs to be set considering blurring.

폭설 시 차량 고립 분석을 위한 오르막 정보 추출 방법 연구

이영진(Youngjin Lee),이상원(Sangwon Lee),황수연(Suyeon Hwang),김수빈(Subin Kim),최진무(Jinmu Choi) 대한공간정보학회 2022 한국지형공간정보학회 학술대회 Vol.2022 No.5

진단 의료 복부 X-선 영상 시스템 기반 Total Variation (TV) 노이즈 감소 알고리즘 적용

이영진(Youngjin Lee),강성현(Seong-Hyeon Kang),이용구(Yong-Gu Lee),원영진(Young Jin Won) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6

디지털 컬러 의류의 구현 방안에 관한 연구

이영진(Lee youngjin),이주현(Lee joohyeon) 한국색채학회 2011 한국색채학회 논문집 Vol.25 No.3

디지털 컨버젼스 환경이 급속히 발달하면서 관련 기술을 사용하여 인간의 삶을 보다 편리하게 하면서 감성적인 만족을 추구하는 경향이 의식주 분야 전반에 걸쳐 나타나고 있다. 이러한 흐름의 예로 의류 분야에서는 디지털 기능을 의복에 포함시킨 스마트 의류의 발달을 들 수 있다. 스마트의류는 디지털 환경과 소통하면서 인간에게 편의를 제공하는 신 기능성 의류로 선진국을 중심으로 다양한 애플리케이션의 의류들이 개발되고 있다. 스마트 의류의 다양한 애플리케이션 중 디지털 컬러 의류는 인간의 즐거움에 관한 감성을 충족시키며 동시에 패션 제품의 심미성을 높여 착용자의 만족도를 높을 수 있는 새로운 표현의 장르이다. 또한, 의류가 가지는 패션성의 속성과 가장 합치하므로 디지털 컬러 의류의 발전 가능성은 충분하다고 볼 수 있을 것이다. 따라서 패션과 디지털 컬러 의류에 관한 구현 방법과 접목은 매우 필요하다고 하겠다. 본 연구에서는 디지털 컬러 의류를 정의하고 디지털 컬러 의류의 연구 동향과 디자인 프로세스 모형 및 프로토타입을 제시하고 관련 섬유 기술 및 전자 패키징 기술을 고찰하여 상용화를 위한 기반이 되고자 하였다. 본 연구에서는 디지털 컬러 의류의 현재까지 개발된 프로토타입을 제시하고 앞으로의 발전 방향에 대하여 논하고자 한다. 현재 디지털 컬러 의류는 독자적인 응용 프로토타입부터 다양한 어플리케이션에 부분적인 적용에 이르기까지 그 영역이 점차 넓어지고 있으며 그에 수반한 다양한 기술이 개발되고 있어 그에 따른 적용방안과 제반 연구가 요구되어진다. As the rapid development of digital convergence environment, throughout our lives, the lives of human-related technology easier to use and tend to seek emotional satisfaction, are appearing. An example of this trend, the digital features clothing apparel sector was included in the development of smart clothing can be. Smart clothing with the digital environment to provide convenience to humans when communicating new functional clothing, and a variety of applications in developed countries, mainly garments are being developed. Of various applications of smart clothing clothing digital color is the new genre. Because of the enjoyment of human emotion meets the aesthetic of fashion products at the same time increase the wearer’s satisfaction, because the increase. In addition, the kinds of clothing and fashion, because of the properties and the most consistent growth potential of digital color clothing will be considered sufficient. Therefore, the digital color clothes on fashion and how to implement and apply its will be very necessary. In this study, the definition digital color garment and its trends, and design process models and prototypes were presented. And, related to study textile technology and electronics packaging technologies has become the foundation for the commercialization. In this paper, digital color clothing so far developed a prototype of the proposed future direction of development will be discussed. Current digital color clothing from their own application prototype for a variety of applications ranging from partial effect gradually widen the area and it entailed a variety of techniques have been developed and applied accordingly, and various research methods is needed.