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.

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.

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.

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.

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.

Feasibility of application for fast non local means noise reduction algorithm with X-ray image using human anthropomorphic phantom

Youngjin Lee(이영진),Jina Shim(심지나),Seong-Hyeon Kang(강성현),Hye Ran Choi(최혜란),Eunsoo Seo(서은수),Jeewoo Hwang(황지우),Heekyung Oh(오희경) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6

승용차 디스크 브레이크 패드용 전자시스템의 열 실험

이영진(Youngjin Lee),김정민(Jeongmin Kim),안태창(Taechang An) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

명상을 통한 성욕(性慾)의 극복으로부터 아만(我慢)의 제거까지

이영진(Lee Youngjin) 경북대학교 인문학술원 2021 동서인문 Vol.- No.15

이 논문은 초기 유가행파(瑜伽行派)의 백과사전적 문헌인 『유가사지론』(Yogācārabhūmi)의 성욕을 주제로 한 게송들과 그에 대한 주석을 다룬다. 이 게송들은 본래 잡아함경 등의 초기경전에 있던 내용인데, 『유가사지론』 중 「사소성지」(思所成地)에서는 ‘핵심 주제의 의미를 다루는 게송들의 주석’(Śarīrārthagāthānirdeśa) 부분에서 인용되고 있다. 이 게송들은 요가 수행자가 부정관(不淨觀), 고관(苦觀), 무아관(無我觀), 몸에 대한 혐오감의 반복 수습의 다양한 명상과정을 통하여 성욕을 극복하고, 나아가 ‘나는 ~이다’는 자아관념을 동반한 아만(我慢)을 무상삼매(無相三昧 ānimittasamādhi)를 통해 제거하는 과정을 거쳐, 최종적으로 모든 고통을 종식하는 과정에 대해 노래하고 있다. 그리고 초기유가행파 소속의 학자(들)은 이 게송들에 대하여 짧지만 매우 흥미로운 주석을 가하고 있다. 본 논문은 두 가지 목표를 가지고 쓰여 졌다. 첫 번째는 이 게송들의 주석에 대한 산스크리트 에디션과 그 번역을 학계에 보고하는 것이다. 에노모토 후미오(榎本文雄)가 1989년 ‘핵심 주제의 의미를 다루는 게송들’의 산스크리트 에디션을 출판하였고 몇몇 학자들이 이 편집본에 의거하여 게송들을 연구해왔지만, 게송들의 주석에 대한 연구는 산스크리트 편집본의 부재로 인하여 본격적으로 시작되지 못했다. 본 논문에서 제시하는 산스크리트 편집본의 본문은 이 주석에 대한 본격적인 연구의 시작을 알리는 마중물이 될 것이라고 기대한다. 두 번째는 단지 문헌학적 작업의 소개에만 그치지 않고, 산출된 텍스트에 대해 비판적 방법론을 적용하는 것이다. 본 논문에서는 이러한 방법론 중 ‘강요된 해석’(forced interpretation)을 드러내는 것에 집중하였다. 이는 초기 유가행파에 속한 주석가(들)이 초기경전의 ‘성욕’을 주제로 한 게송들의 본래 의미와 의도를 자신이 속한 학파의 사상과 체계에 맞추어 어떻게 비틀어 해석하여 받아들였는가[變容]를 조사하는 것이다. This paper examines a set of verses about sexual desire (kāmarāga) and early Yogācāra"s commentary on it in the Cintāmayī Bhūmi (Foundation concerning what is derived from reflection) chapter of the Yogācārabhūmi, an encyclopedic work of the early Yogācāra school. In the part of *Śarīrārthagāthānirdeśa (Verses on the meaning of canonical corpus and their commentary) of the Cintāmayī Bhūmi, the set of verses is quoted from early Buddhist scriptures, such as the Saṃyuktāgama. These verses sing of the process by which a yoga practitioner overcomes sexual desire and further eliminates the conceit (māna) by means of meditation, such as the contemplation of the impure, suffering and the non-self, eventually to put an end to all sufferings. There are relatively short but nonetheless interesting commentaries on these verses by an early Yogācāra scholar (or possibly scholars). This paper has two objectives. The first objective is to present the main text of the commentary part, borrowed from my unpublished critical edition of the Śarīrārthagāthānirdeśa, and its Korean translation. Fumio Enomoto had published an edition of the entire verses of the chapter in 1989 and a few scholars have been studying these verses based on Enomoto"s edition. However, there are little studies on their commentaries because of the lack of critical edition on that part. The second objective is to find out ‘forced interpretations’ made by the commentator(s), that is to say, to shed light on the commentator(s)’s distortion of the original meaning and intention of the verses so as to fit their contents to the system of the early Yogācāra school. One of the most noteworthy interpretations in this regard is the interpretation of the compound mānānuśaya, which should be understood as propensity for conceit, as ‘the ‘I am’ conceit and the latent tendency for sexual desire. This forced interpretation is based on the early Yogācāra"s stance that divides afflictions (kleśa) into two modes, namely the latent tendency (anuśaya) and its outburst (paryavasthāna). Consequently, the samādhi of signlessness (ānimittasamādhi), which initially intended to uproot the conceit (māna), comes to relate with the elimination of the latent tendency for sexual desire.