전자빔 조사 및 Ag 완충층에 의한 ZnO/Ag 박막의 구조적·광학적·전기적 특성 개선 효과

최진영,엄태영,박윤제,최수현,김대현,조윤주,김대일,Choi, Jin-Young,Eom, Tae-Young,Park, Yun-Je,Choi, Su-Hyun,Kim, Dae-Hyun,Cho, Yun-Ju,Kim, Daeil 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.4

In this work, in order to effectively improve the electrical conductivity and visible light transmittance of ZnO thin films, ZnO single layer and ZnO/Ag bi-layer films were deposited on glass substrates by radio frequency and direct current magnetron sputtering, and then, the effects of an Ag buffer layer and electron beam irradiation on the electrical and optical properties of the films were investigated. The observed results indicate that ZnO 100 nm / Ag 7 nm films show higher opto-electrical performance than the ZnO single layer film. In addition, electron beam irradiation also effectively enhanced the visible transmittance and electrical conductivity of the ZnO/Ag bi-layer films.

알러젠 제거(除去) 옻나무 추출물(抽出物) 투여(投與)로 호전(好轉)된 편도선암(扁桃腺癌) 환자(患者) 1례(例)

최진영,박재우,김경석,최원철,윤성우,Choi, Jin-Young,Park, Jae-Woo,Kim, Kyung-Suk,Choi, Won-Cheol,Yoon, Seong-Woo 대한암한의학회 2007 大韓癌韓醫學會誌 Vol.12 No.1

Tonsil is rich in lymphatics, blood vessels, muscle, nearby nerve fibers and epithelium. All of these are potential sources of malignancy. Malignancy of the tonsils is an uncommon entity that accounts for little more than 0.5% of new malignancies in the United States every year. Approximately, more than 70% of malignancies in this region are squamous cell carcinoma. In this report, I introduce a case of 47 year male patient who has right tonsillar cancer that is squamous cell carcinoma(T4N3M0). After three times chemotherapy, the patient refused to get conventional western medical treatment including chemotherapy and surgical operation. After 8 month of traditional oriental medical treatment using allegen removed Rhus Verniciflua Stokes(ARV), the size of cancer mass decreased and mass showed necrosis at inner portion. The patient improved pain in the neck. More case will be needed in order to determine the effect of ARV on tonsillar cancer.

Implementation of Tile Searching and Indexing Management Algorithms for Mobile GIS Performance Enhancement

최진영,Lee, Kang-Won,Choi, Jin-Young 한국사물인터넷학회 2015 한국사물인터넷학회 논문지 Vol.1 No.1

The mobile and ubiquitous environment is experiencing a rapid development of information and communications technology as it provides an ever increasing flow of information. Particularly, GIS is now widely applied in daily life due to its high accuracy and functionality. GIS information is utilized through the tiling method, which divides and manages large-scale map information. The tiling method manages map information and additional information to allow overlay, so as to facilitate quick access to tiled data. Unlike past studies, this paper proposes a new architecture and algorithms for tile searching and indexing management to optimize map information and additional information for GIS mobile applications. Since this involves the processing of large-scale information and continuous information changes, information is clustered for rapid processing. In addition, data size is minimized to overcome the constrained performance associated with mobile devices. Our system has been implemented in actual services, leading to a twofold increase in performance in terms of processing speed and mobile bandwidth.

약용식물(오크라, 엉컹퀴, 엄나무, 줄풀) 유래 페놀성 물질의 항산화 활성

최진영,조민경,구영미,김현경,신진원,김동영,김혜진,이은호,김나현,조영제,Choi, Jin-Young,Jo, Min-Kyeong,Goo, Young-Mi,Kim, Hyun-Kyung,Shin, Jin-Won,Kim, Dong-Yeong,Kim, Hye-Jin,Lee, Eun-Ho,Kim, Na-Hyun,Cho, Young-Je 경북대학교 농업과학기술연구소 2015 慶北大農學誌 Vol.33 No.2

안전한 천연물을 이용한 천연항산화제 개발 연구의 일환으로, 오크라, 엉컹퀴, 엄나무 및 줄풀 등 4종의 천연 약용식물 추출물의 항산화 활성을 측정해보았다. 추출물의 총 phenolic compounds 함량은 오크라와 엉컹퀴는 50% ethanol, 엄나무는 40% ethanol, 줄풀은 60% ethanol에서 최대용출을 나타내었으며, water 추출물에서 2.72~34.15 mg/g, ethanol 추출물에서 2.83~34.23 mg/g의 용출율을 나타내었다. 4종류 약용식물 water과 ethanol 추출물의 DPPH radical 소거능은 $50{\mu}g/mL$의 저농도에서 모두 74% 이상의 높은 소거활성을 나타내었다. ABTS radical cation decolorization을 측정한 결과, 4종의 약용식물 water 추출물과 ethanol 추출물 $100{\mu}g/mL$의 농도에서 모두 88% 이상의 높은 저해율을 나타내었다. 지용성 물질에 대한 항산화 효과를 측정하기 위해 antioxidant protection factor(PF)를 측정한 결과, 엉컹퀴 water과 ethanol 추출물 $50{\ddot{I}}g/mL$의 저 농도에서 각각 1.73과 1.76 PF로 다른 약용식물 보다 높은 항산화효과를 나타내었다. TBARs 생성 억제율을 측정한 결과 오크라를 제외한 3종의 약용식물 추출물 $50{\mu}g/mL$ phenolic 농도에서 80% 이상의 생성억제 효과를 나타내었다. 이러한 결과에 따라 다양한 약용식물 추출물이 항산화 및 기능성 식품 소재로 활용이 가능하다고 판단되었다. In this study, the antioxidant activity of water and ethanol extracts from Hibiscus esculentus, Cirsium japonicum, Zizania latifolia and Kalopanax pictus for functional food source were examined. The optimal conditions for phenolic compounds extraction from medicinal plants were at 50% ethanol with Hibiscus esculentus and Cirsium japonicum var. ussuriense, at 40% ethanol with Kalopanax pictus and at 60% ethanol with Zizania latifolia. The total phenolic contents from the extracts of medical plants were determined to be 2.72~34.15 mg/g in the water extracts and 2.83~34.23 mg/g in the ethanol extracts. The electron-donating abilities (EDA) of the water and ethanol extracts were both above 74% at the low concentration of $50{\mu}g/mL$. The ABTS radical-cation decolorization was above 88% at $100{\mu}g/mL$ concentration in all the extracts of various medicinal plants. The antioxidant protection factor (PF) in the water and ethanol extracts of the Cirsium japonicum var. ussuriense extracts was $1.73{\pm}0.02PF$ and $1.76{\pm}0.01PF$ at $50{\mu}g/mL$ concentration respectively, and was higher than those of the other medicinal-plant extracts. The TBARs inhibition rates of all the medicinal-plant extracts, were above 80% at the $50{\mu}g/mL$ concentration except Hibiscus esculentus. These results confirmed that the various oriental medicinal plants (Hibiscus esculentus, Cirsium japonicum var. ussuriense, Kalopanax pictus and Zizania latifolia) that were included in this study are useful anti-oxidant and functional-food resources.

폐쇄성 수면 무호흡증 환자에 있어서 두부방사선 계측 분석 및 인후 내시경적 연구

최진영,Choi, Jin-Young,Engelke, W. 대한악안면성형재건외과학회 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.2

The pathomechanism of obstructive sleep apnea(OSA) is not clearly elucidated. The possible mechanisms are pathologic reduction of pharyngeal muscular tonus during sleep, abnormal anatomical stenosis of nasopharyx or a combination of the above two mechanisms. It is very important to find the cause(anatomical location or pathologic dynamic change) of OSA in order to treat it. Cephalometric analysis in patients with obstructive sleep apnea is a good method for evaluating anatomical morphologic change but it cannot give any information about the dynamic changes occurring during sleep. On the contrary, nasopharyngeal endoscopy offer 3 dimensional image and information about the dynamic changes. Accordingly, these two diagnostic tools can be utilize in the diagnosis and treatment planning of OSA Cephalometric analysis of craniofacial skeletal and soft tissue morphology in 53 patients with OSA and 43 controls was performed and cephalometric analysis and nasopharygeal endoscopy were performed in 9 patients with OSA in order to come up with individualized therapy plans. Following results were obtained ; Patients with OSA showed 1. body weight gain 2. clockwise mandibular rotation 3. increased anterior lower facial height 4. inferiorly positioned hyoid bone 5. increased length of soft palate 6. decreased sagittal dimension of nasopharyx 7. increased vertical length of inferior collapsable nasopharyx 8. increased length of tongue Through cephalometric analysis and nasopharygeal endoscopy(mutually cooperative in diagnosis), 9. one can find the possible origin of OSA and make a adequate individualized therapy plan and predict accurate prognosis. Cephalometric analysis and nasopharygeal endoscopy are highly recommended as a diagnostic aid in OSA patients

신경회로망을 이용한 다중 전극 와우각 이식 시스템용 음성처리 알고리즘

최진영,조진호,이건일,Choi, Jin-Young,Cho, Jin-Ho,Lee, Kuhn-Il 대한의용생체공학회 1990 의공학회지 Vol.11 No.1

A New speech processing algorithm using neural networks is proposed. We transform input data into frequency domain and process them by neural networks of 22 output neurons which have Bark scale on the ground that the Bark scale is similiar with that of the characteristics of human cochlea. An utilized neural network is multilayer perceptron, and the characteristics of cochlea have it trained by error back propagation learning algorithm. The trained neural networks suffices functions of human cochlea including the effects of automatic gain control, compression and equalization. Simulation results show that the proposed speech processing algorithm has good performance in automatic gain control, compression and equalization.

NMOS 트랜지스터와 싸이리스터 보호용 소자를 이용하는 입력 ESD 보호방식의 비교 연구

최진영,Choi, Jin-Young 한국전기전자학회 2009 전기전자학회논문지 Vol.13 No.1

보호용 NMOS 소자 또는 lvtr_thyristor 소자를 사용하는 고주파 CMOS IC용 입력 ESD 보호회로 방식을 대상으로, 2차원 소자 시뮬레이터를 이용하는 DC 해석, 혼합모드 과도해석 및 AC 해석을 통해 보호용 소자내 격자온도 상승 및 입력버퍼단의 게이트 산화막 인가전압 측면에서의 HBM ESD 보호강도에 대한 심도 있는 비교 분석을 시도한다. 이를 위해, 입력 ESD 보호회로가 장착된 CMOS 칩의 입력 HBM 테스트 상황에 대한 등가회로 모델링 방법을 제시하고, 5가지 HBM 테스트 모드에 대해 최대 4개의 보호용 소자를 포함하는 혼합모드 과도 시뮬레이션을 시행하고 그 결과를 분석함으로써 실제 HBM 테스트에서 발생할 수 있는 문제점들에 대한 상세한 분석을 시도한다. 이러한 과정을 통해 고주파용 입력 보호회로로서의 두 가지 보호방식의 장단점에 대해 설명하는 한편, 각 보호용 소자의 설계와 관련되는 기준을 제시한다. For two input ESD protection schemes utilizing the NMOS protection device or the lvtr_thyristor protection device, which is suitable for high-frequency CMOS ICs, we attempt an in-depth comparison study on the HBM ESD protection level in terms of lattice heating inside the protection devices and the peak voltage applied to the gate oxides in the input buffer through DC, mixed-mode transient, and AC analyses utilizing the 2-dimensional device simulator. For this purpose, we suggest a method for the equivalent circuit modeling of the input HBM test environment for the CMOS chip equipped with the input ESD protection circuit. And by executing mixed-mode simulations including up to four protection devices and analyzing the results for five different test modes, we attempt a detailed analysis on the problems which can be occurred in a real HBM test. In this procedure, we explain about the strength and weakness of the two protection schemes as an input protection circuit for high-frequency ICs, and suggest guidelines relating to the design of the protection devices.

정전기 보호용 소자의 AC 모델링에 관한 연구

최진영,Choi, Jin-Young 한국전기전자학회 2004 전기전자학회논문지 Vol.8 No.1

2차원 소자 시뮬레이터를 이용한 AC 해석 결과를 토대로 ESD 보호용 소자의 AC 등가회로 모델링을 시도한다. NMOS 보호용 트랜지스터의 AC 등가회로는 다소 복잡한 형태로 모델링되며, 이를 간단히 RC 직렬회로로 모델링할 경우 주파수 영역에 따라 오차가 크게 발생할 수 있음을 설명한다. 또한 싸이리스터형 pnpn 보호용 소자의 등가회로는 간단히 RC 직렬회로로 모델링될 수 있음을 보인다. 추출한 등가회로를 이용한 회로 시뮬레이션에 근거하여, 주요 RF 회로의 하나인 LNA에 ESD 보호용 소자를 장착할 경우 보호용 소자의 기생성분이 LNA의 특성에 미치는 영향에 대해 조사해 본다. NMOS 보호용 트랜지스터를 단순히 커패시터 하나만으로 모델링할 경우 회로특성의 예측에 큰 오류가 발생할 수 있음을 설명한다. 또한 제시한 pnpn 보호용 소자를 사용할 경우 보호용 소자의 장착에 의한 LNA 회로의 특성 열화가 크게 감소될 수 있음을 확인한다. From the AC analysis results utilizing a two dimensional device simulator, the ac equivalent-circuit modeling of the ESD protection devices is executed. It is explained that the ac equivalent circuit of the NMOS protection transistor is modeled by a rather complicated form and that, depending on the frequency range, the error can be large if it is modeled by a simple RC serial circuit. It is also shown that the ac equivalent circuit of the thyristor-type pnpn protection device can be modeled by a simple RC serial circuit. Based on the circuit simulations utilizing the extracted equivalent circuits, the effects of the parasitics in the protection device on the characteristics of LNA are examined when the LNA, which is one of the important RF circuits, is equipped with the protection device. It is explained that a large error can result in estimating the circuit characteristics if the NMOS protection transistor is modeled by a simple capacitor. It is also confirmed that the degradation of the LNA characteristics by incorporating the ESD protection device can be reduced a lot by adopting the suggested pnpn device.

시뮬레이티드 어닐링 기반 m-RUN 교착 회피 정책 생성 알고리즘 설계

최진영,Choi, Jin-Young 한국시뮬레이션학회 2011 한국시뮬레이션학회 논문지 Vol.20 No.4

This work presents an algorithm for generating multi-RUN (m-RUN) deadlock avoidance policy based on simulated annealing algorithm. The basic idea of this method is to gradually improve the current m-RUN DAP after constructing an initial m-DAP by using simple m RUN DAPs. The search for a neighbor of the current m-RUN DAP is done by selecting and changing only one component of the current m-RUN, while accepting some unimproved solutions with some probability. It is examined for its performance by generating some sample system configurations. 본 연구에서는 시뮬레이티드 어닐링 알고리즘에 기반한 다중 RUN(multi-RUN: m-RUN) 교착 제어 정책 생성 알고리즘 설계에 대해 제안하였다. 이 방법은 단순한 RUN DAP를 m개 생성한 후 이들의 합성에 의해 초기 m-RUN DAP를 정의하고 이를 점차적으로 개선시켜 나가는 것이다. 이 때 이웃(Neighbor) m-RUN은 현재 m-RUN에서 오직 한 개의 성분 RUN만을 랜덤하게 수정하여 생성하는 지역 탐색 기법을 적용하여 선택하였다. 또한 몇 가지 기본적인 시스템 구성을 가정하고 수치 실험을 적용하여 제안된 교착 제어 정책 성능의 우수성을 평가하였다.

활엽수 분재의 선충 조사

최진영,정영학,이동운,추호렬,박정규,Choi, Jin Young,Jung, Young Hack,Lee, Dong Woon,Choo, Ho Yul,Park, Chung Gyoo 한국응용곤충학회 2018 한국응용곤충학회지 Vol.57 No.4

Bonsai is part of export forest products in Korea. Demand for bonsai exports to other countries is growing but the need for quarantine hazards must be eliminated in other to export. Plant parasitic nematode is also an important factor in quarantine. The nematodes were surveyed from bonsai farms in 6 areas of Korea. The surveyed deciduous bonsai plants were Acer palmatum, Zinnia elegans, Ligustrum obtusiflium, Carpinus turcaninowii, and Malus sieboldii. Three plant parasitic nematodes (Hemicyliophora koreana, Rotylenchus blothrotylus and Xiphinema americanum) and three non-parasitic nematodes (Aporclaimellus donghwaens, Egtitus andhricus, and Mesodorylaimus usitatus) were isolated from bonsai. Non-parasitic nematode, Mesodorylaimus usitatus was isolated from all surveyed bonsai trees. Only two species of quarantine nematodes (Hemcylicopora koreana and Xiphinema americanum) were found from bonsai. A. donghwaens and M. usitatus were isolated from root of bonsai tree. However other nematodes were isolated from soil in bonsai trees. 분재는 우리나라의 주요 수출 임산물이다. 외국으로의 분재수출 요구도는 증가하고 있지만 수출을 위해서는 검역적 위해 요소가 제거 되어야 하는데 식물기생선충도 검역의 중요 대상이다. 우리나라 6개 분재원에서 활엽수 분재[단풍나무(Acer palmatum), 백일홍(Zinnia elegans), 쥐똥나무(Ligustrum obtusiflium), 소사나무(Carpinus turcaninowii), 애기사과(Malus sieboldii)]를 대상으로 발생하는 선충을 조사하였다. 세 종의 식물기생선충[미국검선충(Xiphinema americanum), 둥근꼬리붙이나선선충(Rotylenchus blothrotylus), 한국껍질선충(Hemicycliophora koreana)]과 세 종의 비기생 선충 [등화육각창선충(Aporclaimellus donghwaens), 둥근꼬리붙이나선선충(Egtitus andhricus), 계룡중간창선충(Mesodorylaimus usitatus)]들이 분재로부터 분리되었다. 비기생선충인 계룡중간창선충은 모든 조사 수종에서 검출되었고, 미국 과 EU연합 검역대상 선충으로는 한국껍질선충과 미국검선충의 두 종만 발견되었다. 등화육각창선충과 계룡중간창선충은 분재목 뿌리에서 분리되었고, 나머지 선충들은 토양에서 분리되었다.