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Yun, II,Chung, In-Kyo,Kang, Jung-Sook 생화학분자생물학회 1993 한국생화학회지 Vol.26 No.5
Intramolecular excimer formation of 1,3-di(1-pyrenyl)propane (Py-3-Py) and fluorescence polarization of 1,6-diphenyl-1,3,5-hexatriene (DPH) were used to evaluate the effects of ethanol on the rate and the range of lateral mobility and the range of rotational mobility of bulk bilayer structures of plasma membrane vesicles (ATCC-PMV) isolated from cultured hybridoma cells (ATCC TIB 216). In a concentration-dependent manner, ethanol increased the excimer to monomer fluorescence intensity ratio (I'/I) of Py-3-Py in the ATCC-PMV and decreased the anisotropy (r), the limiting anisotropy $(r_{\infty})$, and the order parameter (S) of DPH in the ATCC-PMV. This indicates that ethanol increased both the lateral and the rotational diffusion of the probes in the ATCC-PMV. Selective quenching of DPH by trinitro-phenyl groups was used to examine the range of the transbilayer asymmetric rotational diffusion of the ATCC-PMV. The anisotropy (r), the limiting anisotropy $(r_{\infty})$, and the order parameter (S) of DPH in the inner monolayer were 0.024, 0.032, and 0.069, respectively, greater than calculated for the outer monolayer of the ATCC-PMV. Selective quenching of DPH by trinitrophenyl groups was also used to examine the transbilayer asymmetric effects of ethanol on the range of the rotational diffusion of the ATCC-PMV. Ethanol had a greater fluidizing effect on the outer monolayer as compared to the inner monolayer of the ATCC-PMV. It has been proven that ethanol exhibits a selective rather than nonselective fluidizing effect within the transbilayer domains of the ATCC-PMV.
Temporal Variation Due to Tense vs. Lax Consonants in Korean
Yun, II-Sung Korean Society of Speech Sciences 2004 음성과학 Vol.11 No.3
Many languages show reverse durational variation between preceding vowel and following voiced/voiceless (lax/tense) consonants. This study investigated the likely effects of phoneme type (tense vs. lax) on the timing structure (duration of syllable, word, phrase and sentence) of Korean. Three rates of speech (fast, normal, slow) applied to stimuli with the target word /a-Ca/ where /C/ is one of /p, p', $p^h$/. The type (tense/lax) of /C/ caused marked inverse durational variations in the two syllables /a/ and /Ca/ and highly different durational ratios between them. Words with /p', $p^h$/ were significantly longer than that with /p/, which contrasts with many other languages where such pairs of words have a similar duration. The differentials between words remained up to the phrase and sentence level, but in general the higher linguistic units did not statistically differ within each level. Thus, the phrase is suggested as a compensatory unit of phoneme type effects in Korean. Different rates did not affect the general tendency. Distribution of time variations (from normal to fast and slow) to each syllable (/a/ and /Ca/) was also observed.
스테레오 카메라를 이용한 측두하악관절 교정장치(NO SICK)의 성능 평가
윤홍일(Yun, Hong-Ii),박준수(Park, Joon-Su),정구영(Chung, Koo-Yeong),신기영(Shin, Ki-Young),박준기(Park, Joon-Ki) 한국정보전자통신기술학회 2015 한국정보전자통신기술학회논문지 Vol.8 No.5
카이로프래틱 치료에서 측두하악관절(TMJ)는 인체의 균형을 유지하는데 중요한 역할을 하는 관절로서 구강내 교정장치를 통해 인체의 균형을 교정할 수 있게 된다. 현재 이러한 구강내 교정장치의 효과를 스테레오비전을 이용하여 정량적으로 평가할 수 있는 측정 장치가 없었기 때문에 본 연구에서는 이를 측정 할 수 있는 시스템을 개발하였다. 이 시스템은 스테레오 비전과 적외선 조명, 적외선 통과 필터 등으로 구성되어 있으며, 광학식 마커를 피험자의 주요 부위에 부착하여야 한다. 마커의 부착위치는 얼굴의 주요 랜드 마커 중 구강내 교정장치의 착용으로 인해 변화가 나타날 수 있는 8개의 부위를 선택하였다. 개발된 시스템을 이용하여 11명의 피험자를 대상으로 교정장치 착용 전/후 마커의 변화량을 측정하였을 때, 피험자의 얼굴에 부착된 마커의 위치 변화가 정량적으로 측정되었다. TMJ(TemporoMandibular Joint) is considered as the most important articulation in human body for maintaining the balance. Thus it is one of the main treatment areas in Chiropractic. Instead of Chiropractic treatment, NOSICK, a TMJ balancing device, can be used. As there is no such device to quantify the effect of NOSICK, a system was developed to measure the effect of NOSICK. This system is composed of stereo vision, infrared lights, and infrared through filter, etc. It requires optical markers for the measurement. 8 land markers were selected from the face which will show different displacement as NOSICK is applied. 11 test subjects were measured with the system developed with and without NOSICK applied. Quantifiable displacement of markers before and after applying NOSICK was successfully measured with the system developed.
Chondrogenesis of Adipose Stem Cells in a Porous Polymer Scaffold: Influence of the Pore Size
Im, Gun-Ii,Ko, Ji-Yun,Lee, Jin Ho SAGE Publications 2012 CELL TRANSPLANTATION Vol.21 No.11
<P>This study examined how the difference in pore size of porous scaffolds affected the in vitro chondrogenic differentiation of seeded adipose stem cells (ASCs) and the in vivo cartilage repair of ASC/scaffold construct. ASCs were isolated from 18 rabbits and seeded in a porous poly (ε-caprolactone) (PCL) scaffold with different pore sizes (100, 200, 400 μm). The ASCs underwent in vitro chondrogenic induction under TGF-β2 and BMP-7 for 21 days before analysis. The ASC/scaffold construct was also implanted on the osteochondral defect created on the distal femur of the same rabbits, and the quality of cartilage regeneration was analyzed after 8 weeks. At day 21, the ASCs proliferated and spread on the surface of the scaffolds with a pore size 100 and 200 μm, whereas there were many lumps of conglomerated ASCs on those with a pore size of 400 μm. The DNA content was significantly lower in the scaffold with a pore size of 400 μm than in that with a pore size of 100 or 200 μm. Proteoglycan production was significantly greater in the scaffold with a pore size of 400 and 200 μm than in that with a pore size of 100 μm. The chondrogenic marker gene expression including SOX9 and COL2A1 was greatest in the scaffold with a pore size of 400 μm followed by 200 μm. Immunofluorescent imaging showed that, while SOX9 was localized to nucleus, type II collagen was observed on the cytoplasm and secreted matrix around the cells most abundantly in the scaffold with a pore size of 400 μm followed by 200 μm. The gross and histological findings from the osteochondral defects showed that the cartilage repair was better in the scaffold with a pore size of 400 and 200 μm than in that with a pore size of 100 μm.</P>
( Je Jung Yun ),( Young Ii Jeong ),( Soon Do Yun ),( Ung Il Kang ),( Eun Mi Han ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.4
Polymers; advanced materials, have useful optoelectric properties as semiconducting devices, electromagnetic shielding materials, polymer light emitting diodes, especially bio-materials. Our group synthesized amphiphilic block copolymer with solvophobic or solvophilic behavior, and characterized as a function of photovoltaic cell. This block copolymer (abbreviated GE) have been studied the core shell type of nano-particles as a drug delivery system. We attempt to application as an organic solar cell using this counter properties; hydrophilic and hydrophobic. Polymers are relatively well soluble in organic solvent, tetrahydrofuran (THF), dichloride ethane, chloroform, dimethyl sulfoxide (DMSO), acetone, etc. But water-soluble buffer layer had some interfacial spin coating problems of poly (3,4-ethylene dioxy-thiophene): poly(styrene sulfonate) (PEDT:PSS) with water-soluble materials, or CuPc with the hydrophobic compound, respectively. The device structure was ITOIPEDT:PSS or CuPc/GE/LiF/AI (150 nm).
2011 대구세계육상선수권대회 여자 포환던지기 결선경기의 운동학적 분석
이경일 ( Kyung Ii Lee ),홍완기 ( Wan Ki Hong ),윤충걸 ( Chung Gul Yun ),윤희나 ( Hee Na Yun ),최문영 ( Monn Young Choi ),김자은 ( Ja Eun Kim ) 한국운동역학회 2011 한국운동역학회지 Vol.21 No.5
The purpose of this study was to provide quantified data on the throwing skills of world-class athletes and to analyze the kinematic variables for women shot-putters at the IAAF World Championships Daegu 2011. Three-dimensional motion analyses of the eight players who qualified for the final round were carried out to obtain the data. The Kwon3D XP program was used for image analysis of the kinematic data, which included the configurations of each joint. The following conclusions were arrived at. The throwing distance increased with an increase in the release speed, and a significant correlation (p <. 01) was observed between the throwing distance and release speed. It was also shown that players using the spin technique increased their release speed with a fast shoulder-rotation-angle speed. The release height varied with their height and showed a significant difference with the record. This showed that the release angle did not greatly influence the record for the game, but varied with their technical and physical characteristics. Therefore, an increase in release speed is required to improve the record.