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Polystyrene 입자 수용액에서 프랙탈 차원에 관한 광산란 실험 연구
강명화,김두철,강창희,현동걸 제주대학교 1994 논문집 Vol.39 No.-
Using light scattering technique, we measured intensities of scattered light from aggregation of polystyrene particles of 114nm in a solution of NaCl in the concentration from 0.15 to 2mol/ℓIntensity data give direct information that aggregated cluster are built with fractal structure ; We find that the value for fractal dimension of aggregation in the fast regime 1.25≤c≤2mol/ℓis 1.55 ±0.05 that is nearly consistent with diffusion-limited-aggregation model, whereas in the slow regime (0.3≤c≤0.5mol/ℓ)the value of fractal dimension is 2.12±0.05 agreed with reaction-limited-aggregation model.
강명화,강동식,김두철 濟州大學校 師範大學 科學敎育硏究所 1993 科學敎育 Vol.10 No.1
We have calculated the irradiance distribution function of diffraction for a regularly triangular aperture and obtained the diffraction pattern by the com-puter simulation. Also the diffraction pattern has been observed by the Fraunhofer diffraction experiment. From these results we find that the distribution of diffraction has three symmetric axes and the diffraction pattern in each axes has an alternating bright and dark fringes like the pattern of a single slit.
金允溟,陳年鋼,朴東明 단국대학교 1987 論文集 Vol.21 No.-
This paper represents a graphical design techniques of the symmetrical dielectric waveguide couplers. Ones the phase constants are found by an approximate modal analysis, coupling lengths can be easily calculated for each couplers. This method will be a convenient approach to the designing of dielectric waveguide couplers.
소형 Gun Drill Machine 개발에 관한 연구
오진수,박광훈,남궁재관,우창기,강동명 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-
This compact Gun Drilling Machine was developed to improve productivity and economical efficiency for small and midium enterprise tool makers. To produce specialize tools that gun drilling works should be required prior to making deep holes. Gun drill machines are so expensive and big burden for small tool makers so that works used to execute through outside orders but it was required lot of cost too. Most of gun drill machines are providing for high volume and large capacity enterprises. In order to support for small and medium enterprise purpose that compact gun drill machine was designed and developed. It could be improved products quality, productivity and saving manufacturing cost using this machine.
Kang, Jae Myeong,Lee, Sang-Yoon,Seo, Seongho,Jeong, Hye Jin,Woo, Sung-Ho,Lee, Hyon,Lee, Yeong-Bae,Yeon, Byeong Kil,Shin, Dong Hoon,Park, Kee Hyung,Kang, Hyejin,Okamura, Nobuyuki,Furumoto, Shozo,Yanai, Elsevier 2017 NEUROBIOLOGY OF AGING Vol. No.
<P><B>Abstract</B></P> <P>This study aims to evaluate the clinical validity of [<SUP>18</SUP>F]THK5351 positron emission tomography (PET) for the assessment of disease progression and symptoms in Alzheimer's disease (AD). Fifty-one patients with AD dementia, 30 patients with amnestic mild cognitive impairment (aMCI), and 43 controls with normal cognition (NC) were included. All subjects underwent [<SUP>18</SUP>F]THK5351 PET, 3.0-T magnetic resonance imaging, and detailed neuropsychological tests. Regions of interest and voxel-based statistical analyses were performed. In patients with AD dementia, [<SUP>18</SUP>F]THK5351 retention was greater in most association cortices as well as the limbic area compared to NC or aMCI participants. Patients with aMCI also showed higher THK5351 retention in those areas compared to NC. [<SUP>18</SUP>F]THK5351 retention significantly correlated with neuropsychological test results. Negative correlations between [<SUP>18</SUP>F]THK5351 and [<SUP>18</SUP>F] fluorodeoxyglucose were observed in AD dementia and aMCI groups. Mirror images of [<SUP>18</SUP>F]THK5351 retention and glucose hypometabolism in [<SUP>18</SUP>F] fluorodeoxyglucose were noticeable in the focal variants of AD. [<SUP>18</SUP>F]THK5351 PET reflects disease severity and symptoms in AD. Our results suggest [<SUP>18</SUP>F]THK5351 is reflective of tau-related AD pathology.</P>
Myeong-Gon Kang,Dong-Hyun Han,Sei-Myoung Han,한세명,Eun-Gyeom Jung,Gyeong-Min Kim,이신호,신윤주,Ju-Bin Kang,Dong-Bin Lee,고필옥,조재현,Chung-Kil Won,김충희 한국동물위생학회 2022 韓國家畜衛生學會誌 Vol.45 No.4
Distichiasis is one of the diseases commonly encountered in companion animals, and these abnormal eyelashes cause corneal ulcers, continuous eye irritation, eye pain, glare, epiphora, foreign body sen-sation and can cause corneal opacity and vision loss in severe cases. In this study, an eyelash epilation needle for animals was developed and applied to a real case, and the results were observed. In a case of corneal ulcer caused by distichiasis of a 2-year-old Shih Tzu, a high-frequency surgical instrument for animals was converted into an electric epilation needle to attempt a procedure to destroy the eye-lash hair follicles on the upper eyelid. A epilation needle was developed to have a diameter of 0.1 mm and a length of 4 mm at the end of the handle of DOCTANZ 400, an electrosurgical instrument for animals only. In the procedure, 2~3 mm of an epilation needle was inserted into the hair follicle, and 1 watt of electric power was applied to the hair follicle for about 5 sec. to carry out electrolysis until white bubbles were generated around the meibomian glands thereby destroying the hair follicle. As a result, no eyelashes grew any longer in the treated area indicating that the treatment was successful. It is hoped that the method developed in this study will be applied so that it will be widely used as a treatment method for distichiasis in companion animals that can be frequently seen hereafter.
모어 절삭 후 배출시 고압력 분포의 원활한 흐름을 위한 연구
강동명 ( Dong Myeong Kang ),윤성우 ( Sung Woo Yoon ),박상지 ( Sang Ji Park ),고대웅 ( Dane Woong Go ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.2
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