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습윤견뢰도가 우수한 벤조디퓨라논계 분산염료의 합성에 관한 연구
양재훈,곽태수 한국섬유공학회 1996 한국섬유공학회지 Vol.33 No.7
The benzodifuranone blue disperse dyes could be synthesized from 5-hydroxy-2-oxo-3-phenyl-2,3-dihydrobenzofuran and di(4-aminophenyl)acetic acid derivatives. The dyeing rate, build-up, and wet-fastness of one benzodifuranone disperse dye, 3-phenyl-7-(4'-amino-3',5'-diethy Ipheny 1)-2,6-dioxo-2,6-dihydrobenzodifuran, were compared with commercially av ailable dyes such as C. 1. Disperse Elue 73 and C. 1. Disperse Blue 79, whose chromophores were an-thraquinone and azobenzene, respectively. It was found that the dyeing rate of the ben-zodifuranone disperse dye was slow and the amount of exhausted dye was low, but the wet-fast-ness was excellent. The most important reason for its unique dyeing properties and high wet-fast-ness might be the big planar region in the benzodifuranone chromogen.
양재훈 인문예술학회 2022 인문과 예술 Vol.- No.13
로컬리티 개념은 근대의 중심지향적 논리와 민족국가의 단일성이라는 전제에 저항하고자 하는 것이었다. 그러나 로컬리티 담론의 유행은 지방의 고유성을 과장함으로써 그것을 근대의 외부에 있는 실체적 대상들로 격상시키고, 그럼으로써 오히려 근대의 중심지향적 논리를 공고히 하는 데로 나아간 바 있다. 본고는 인천의 장소들을 제재로 하는 양진채의 소설을 통해 로컬리티 개념을 새롭게 사유할 가능성을 탐구한다. 양진채의 초기 작품들을 특징짓는 것은 특정불가능한 시공간에 속하는 대상을 찾아나섬으로써 현재의 결여를 채우고자 하는 낭만주의적 경향이었다. 그러나 양진채의 소설은 「패루 위 고래」를 통해 인천의 구체적인 장소에 대한 천착으로 이행한다. 이후 양진채는 인천의 장소들에서 잊히고 왜곡된 기억들을 되살려내고 재활성화하는 글쓰기로 나아간다. 이러한 글쓰기는 이른바 ‘충동의 윤리’라 불리는 원리에 의해 수행된다.
DS-CDMA 셀룰라 이동통신 시스템에서 적응변조방식을 이용한 Truncated Type-II Hybrid ARQ 방식과 최대비 합성 다이버시티 기법에 의한 성능 개선
양재훈,김지웅,강희조 한국정보통신학회 2001 한국정보통신학회논문지 Vol.5 No.4
본 논문에서는 DS-CDMA 셀룰라 이동통신 시스템에서 고속의 전송데이터를 전송할 시스템을 이루기 위해 적응변조 방식을 적용한 Truncated Type-II Hybrid ARQ 방식을 제안했다. 여기서, 나카가미 페이딩 채널 환경으로 적응변조 방식을 해석하였다. 적응변조 시스템은 나카가미 페이딩 지수에 따라서 변조 레벨과 심볼율을 제어할 수 있다. Eb/No가 높거나 나카가미 페이딩 지수 m이 높을 경우 이 시스템은 높은 변조 레벨과 높은 심볼율을 선택하여 전송 효율을 증가시키는데 목적이 있다. 이와 반대로, $E_b/N_0$가 낮을 경우, 전송 성능 감소를 막기 위해 낮은 변조 레벨과 낮은 심볼율을 선택한다. 변조 방법으로는 QPSK 16QAM, 64QAM, 256QAM을 채용하였다. Truncated Type-II Hybrid ARQ 기법에 의한 적응변조 방식은 실시간 (delay-limited)처리 및 고신뢰도가 요구되는 이동 통신 및 무선 데이터 통신 시스템에 적용이 가능하리라 판단된다. This paper proposes a Truncated Type-II Hybrid ARQ scheme using an adaptive modulation system to achieve high throughput data transmission systems for DS-CDMA cellular mobile communication systems. In this paper, the adaptive modulation system analyzed in Nakagami (m-distribution) fading channel environment. The adaptive modulation system controls the modulation level and symbol rate according to the Nakagami fading parameter( m). When the received Eb/No is high or the Nakagami fading parameter m is high, the propose system selects higher modulation level and higher symbol rate to increase throughput. On the other hand, this system selects lower modulation level and lower symbol rate to prevent throughput performance degradation when the received Eb/No is low. The modulation method have been adopted QPSK 16QAM, 64QAM, 256QAM. Therefore, adaptive modulation systems with Truncated Type II Hybrid ARQ Scheme is proper for mobile and radio data communication system that require high reliability and delay-limited applications.
경남지방의 도태우에 불임과 관련된 난소의 형태학적 관찰 1. 난포와 황체의 출현에 대하여
양재훈,표병민,서득록,고필옥,강정부,곽수동,김종섭 한국임상수의학회 2002 한국임상수의학회지 Vol.19 No.2
Ovaries from total 192 slaughtered cows, 154 Korean native cows and 38 dairy cows were collected during the slaughtering process in Kimhae, Changyoung and Yangsan abattoirs in Kyungnam province from January 2001 to January 2002. Rates of pregnant and non-pregnant and ovarian findings were invested. Rates of pregnant cows in 192 slaughtered cows were 12.5% (24 cows) and in difference of cow breeds, 11.0% (17 cows) in 154 Korean native cows and 18.4% (7 cows) in 38 dairy cows from total 192 cows, respectively. Ages of fetuses in pregnant Korean native cows were mostly less than 4 months and ages of fetuses in dairy cows were mostly about 7-8 months. Cows which each diameter of follicles and corpus luteums in same cow was more than 5-6 mm in diameter were 69.8% (134 cows) in total 192 slaughtered cows and in difference of cow breeds, 64.7% (11 cows) in 17 Korean native cows and 57.1% (4 cows) in 7 dairy cows. Mean diameter of foliicles and corpus luteums in Korean native cows are 13.7±5.6×11.2±4.6mm and 17.5±4.6×14.6 ±4.0 mm in non-pregnat cows, and are 11.0±4.8×9.1±2.6mm and 21.2±2.9×18.3±2.7mm in pregnant cows, respectively. Mean diameter of follicles and corpus luteums in dairy cows are 15.8±7.1×14.3±6.0 mm and 20.3±5.9× 16.9±5.8mm in non-pregnant cows, and are 10.1±3.0×9.2±2.3mm and 23.0±1.7×20.1±1.3mm in pregnant cows, respectivley. The above findings indicate that the co-appearance rate of follicles and corpus luteums in same cows are higher in both pregnant and non-pregnant cows. Compared in pregnant and non-pregnant cow ovaries, mean size of follicles are smaller in pregnant cows but size of corpus luteums are more larger in pregnant cows than in non-pregnant cows. Correlation of the follicle size (Y) and corpus luteum size (X) in same cows developed each other in inversive size. Those correlative formulas appeared to be Y=-0.2022X+17.175 in Korean native cows and Y=-0.5754 X+24.153 in dairy cows.
NACA 0012 에어포일의 경계층 거동이 근접 후류에 미치는 영향
양재훈,김동하,장조원,Yang, Jae-Hun,Kim, Dong-Ha,Chang, Jo-Won 한국항공운항학회 2006 한국항공운항학회지 Vol.14 No.4
An experimental study was carried out in order to investigate the influence of boundary layer behavior on the near-wake at low Reynolds numbers. An X-type hot-film probe(55R51) was used to measure the near-wake of an NACA 0012 airfoil at static angles of attack ${\alpha}=0^{\circ}$, $3^{\circ}$, and $6^{\circ}$, and the Reynolds numbers Re=2.3${\times}10^4$, 3.3${\times}10^4$, and 4.8${\times}10^4$. The results of the study show that the characteristics of the boundary layer on the airfoil surface have a close relationship with the mean velocity and turbulence intensity profiles of a near-wake. Therefore, the development of the boundary layer, the position of the separation point, and the existence and non-existence of reattachment on the airfoil surface were represented by the differences in mean velocity and turbulence intensity profiles of the near-wake.