한국재래산양의 이개근에 대한 해부학적 연구

이창현,이흥식,이인세,Lee, Chang-hyun,Lee, Heungshik S.,Lee, In-se 대한수의학회 1989 大韓獸醫學會誌 Vol.29 No.3

This study was carried out to investigate the origin, insertion, direction of muscle fibers and structure of the ear muscles of the Korean native goat. The description was based on the dissection of fifteen the Korean native goats with embalming fluid. The results were as follows: 1. The ear muscles of the Korean native goat were composed of the M. zygomaticoauricularis, M. scutuloauricularis superficialis, M. scutuloauricularis profundus, M. frontoscutularis, M. interscutularis, M. parietoauricularis, M. cervicoscutularis, M. cervicoauricularis superficialis, M. cervicoauricularis medius, M. cervicoauricularis profundus, M. auricularis profundus posterior and M. parotidoauricularis. 2. The M. frontoscutularis clearly seperated into temporal and frontal parts in 6 cases. 3. The M. scutuloauricularis profundus clearly separated into major and minor parts. 4. The M. zygomaticoauricularis blended with the M. parotidoauricularis near its insertion, but not with the M. scutuloauricularis.

실리콘 제조 공정에서 발생한 실리콘 슬러지를 활용한 용강 SiC계 승온제 제조 연구

이창현,이상로,박만복,구연수,이만승,Lee, Chang-Hyun,Lee, Sang-Ro,Park, Man-Bok,Koo, Yeon-Soo,Lee, Man-Seung 한국자원리싸이클링학회 2017 資源 리싸이클링 Vol.26 No.6

반도체 산업의 실리콘(Si) 제조과정에서 실리콘과 실리콘 카바이드(SiC)를 포함하는 폐 슬러리가 발생하게 된다. 폐 슬러리는 단순히 시멘트로 고형화하여 보관하거나 매립하는 방법이 있지만, 본 연구에서는 제강공정의 부원료인 승온제로 사용하는 방안이 제시되었다. 폐 슬러리를 정제하여 분말을 만들어 SiC계 슬러지 브리켓으로 재활용하였다. SiC계 슬러지 브리켓은 화학적 성분을 분석하고 투입시기와 투입량에 따른 승온제 특성을 관찰하였다. 이 결과 SiC계 슬러지 브리켓은 제강공장에서 저비용과 고효율로 용강온도를 높이는 효과가 있었다. Most Waste slurry is produced in the process of silicon manufacturing for semiconductor industry, containing silicon (Si) and silicon carbide (SiC). Waste slurry is simply stored with solidifying by cement or buried. On the other hand, it was suggested in this study that the waste slurry should be used for heating source as supplementary material in steel making process. The waste slurry was refined and pulverized, which was recycled into SiC-based sludge briquette. Chemical composition for SiC-based sludge briquette was analyzed and the feature of heating source was observed in accordance with the injection time and input amount. As a result, SiC-based sludge briquette in terms of low cost and high efficiency had an effect on increasing liquid steel temperature in steel making plants.

운동에너지 탄에 따른 전투시스템 내의 순간화재발생에 대한 해석적 연구

이승철(Lee Seung-Chul),전우철(Jeon Woo-Chul),이해평(Lee Hae-Pyeong),이헌주(Lee Heon-Joo),이창현(Lee Chang-Hyun) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7

본 연구는 외부 위협탄에 의한 전투시스템의 취약성을 분석하기 위한 선행연구로써, 운동에너지 탄의 종류에 따른 가상의 전투차량 내부에 적재포탄에서 순간화재발생 여부에 대한 전산해석을 수행하였다. 본 해석은 Autodyn 프로그램을 사용하였으며 순간화재발생을 판단하기 위해 Lee-Tarver ignition and growth model을 이용하였다. 본 계산에서 운동에너지 탄은 type A와 type B 두 가지로 설정하였고, 고폭탄은 COMPB, TNT 및 PBX9404를 설정하였다. 전산해석 결과, 고폭탄의 재질이 TNT와 PBX9404가 COMPB 재질보다 순간화재발생 확률이 상당히 높음을 알 수 있고 type B의 운동에너지 탄이 type A 보다 순간화재발생 확률이 다소 높음을 알 수 있었다.

종가 제례음식 편(?)에 사용하는 송기(松肌)의 식용 근거와 성분 분석

이창현,김영,강민숙,이영은,Lee, Chang-Hyeon,Kim, Young,Kang, Min-Sook,Lee, Young-Eun 한국식생활문화학회 2017 韓國食生活文化學會誌 Vol.32 No.4

This study examined the traditional edible basis and ingredients of Song-gi used for Pyeon of Jong-ga ancestral ritual food. Through an investigation of references, a case study, and ingredient analysis for traditional edible basis of Song-gi, the nutritional value and availability as food material were reviewed. Among the 4 kinds of pine trees from 4,705 types of edible materials usable as food listed in the ${\ll}$Korea Food Standards Codex${\gg}$, 'Pinus radiata D. Don', in which the husk is acknowledged as an edible food, was applied in this study. This study processed the Song-gi following the method of jong-ga and divided into pine inner bark (PIB) and pine inner bark powder (PIBP) to analyze the general composition and dietary fiber. The main composition of PIB was carbohydrate, in which the content was 88.7% per 100 g. The content of dietary fiber was 73.7% per 100 g and the insoluble dietary fiber reached 92.3% in total dietary fiber. In conclusion, the edibility of Song-gi, which has a considerable amount of insoluble dietary fiber caused constipation because it absorbed the moisture in the intestine due to the lack of nutrients but may be developed as a functional food that helps the digestive activation of the intestine and improve the health of the intestine if taken with balanced nutrition.

A Study on the Introduction Plan of the Places of Refuge in Domestic Areas based on the Analysis of Foreign Cases

이창현,박성현,정중식,Lee, Chang-Hyun,Park, Sung-Hyeon,Jeong, Jung-Sik The Korean Society of Marine Environment and safet 2012 해양환경안전학회지 Vol.18 No.3

해상에서 발생하는 대형 해양사고는 재산상의 손실뿐만 아니라 심각한 해양환경 오염피해를 유발하고 있다. 국제해사기구(IMO)에서는 해양사고 발생으로 인한 2차적인 해양환경오염 피해를 최소화하기 위하여 "원조를 필요로 하는 선박"에 선박 피난처를 제공하도록 결의서 Res. A.949(23)로 채택하였다. 해상교통 환경 요소 등에 의한 데이터를 바탕으로 종합적인 측면에서 잠재적 위험평가를 실시하여 위험도의 레벨이 일정한 크기를 초과하게 되면 피난처로 지정될 필요가 있고, 선박의 통항안전성, 혼잡도 및 위험도의 정량화/표준화된 기술을 기반으로 선박 피난처 지정 시스템 기술개발이 시급하다. 또한, 선박 피난처를 지정하는 문제는 연안국의 자연환경을 보호하기 위한 국가 정책과 밀접한 관련이 있기 때문에 관련 법안을 마련하는 것이 최우선이다. 본 연구에서는 선박 피난처를 지정 운영하고 있는 외국 사례 분석을 통해 효율적인 국내 선박 피난처 도입방안을 마련하고자 하였다. A huge marine accident causes a loss of valuable lives, property and the serious marine environment pollution. IMO adopted resolution A.949(23) to provide Places of Refuge(PoR) to 'Ship in need of assistance', which is to minimize the secondary environmental pollution caused by marine accidents. If the level of risk exceeds a certain range, it is necessary to be designated as Places of Refuge(PoR) after evaluation of potential risk, which is based on the database of several marine environmental factors. Also, it is necessary to develop skills about quantification/standardization of vessel traffic safety, complexity and risk. Because there is the close relation between the problem of designating Places of Refuge(PoR) and the policy of nation for protecting the natural environment of coastal state, it is important to prepare related legislation. In this paper, introduction of Places of Refuge(PoR) in domestic areas have been suggested based on the analysis of several foreign designating cases.

여수항 묘도수로 개선에 관한 연구

이창현,이홍훈,권유민,Lee, Chang-Hyun,Lee, Hong-Hoon,Kwon, Yu-Min 해양환경안전학회 2021 해양환경안전학회지 Vol.27 No.6

여수항 묘도수도는 위험물 정제품을 운반하는 위험화물운반선의 주요 선박통항로로 이용되고 있다. 현재 묘도수로에서는 단독통항만을 허용하고 있고 통항 속력 또한 8노트로 제한되어 있다. 이로 인하여 위험물 정제품 부두에서의 체선료 또한 증가 추세에 있다. 향후 다수의 위험물 정제품 부두의 개발로 인하여 대상해역의 이용선박은 더욱 대형화되고 선박통항량 또한 증가될 것으로 예상하고 있다. 따라서 묘도수로를 이용하는 선박의 안전성 확보 및 체선료 개선을 위해서 묘도수로의 개선이 시급한 시점이다. 본 연구에서는 묘도수로의 해상환경 분석 및 해역 이용자 의견수렴 과정을 통하여 묘도수로의 개선안을 제시하였으며, 항만설계기준 검토 및 선박조종 시뮬레이션 평가를 통하여 항로 폭을 300m로 확장하고 수심 9.50m로 확보하는 방안을 최종적으로 제시하였다. 또한 해상교통혼잡도 평가 결과 현재 단독통항만이 허용되고 있는 상황에서 피크타임 해상교통혼잡도는 71.01%에서 교행이 허용되는 상황에서도 47.3%로 크게 개선되는 것으로 평가되었다. 제시한 묘도수로 개선방안에 따라 대상해역에서의 선박 통항안전성을 확보할 수 있으며, 체선료 문제 또한 개선될 것으로 판단되었다. The Myodo-Strait at Yeosu Port is normally used as a major vessel passage for dangerous cargo carriers that carry regular products of dangerous goods. Currently, the Myodo-Strait allows only single passage, and the speed of passage is also limited to 8 knots. As a result, demurrage at the wharf of hazardous goods are also on the rise. It is expected that the development of a number of dangerous commodity wharf in the future will increase the volume of vessel traffic and increase the number of vessels used in the project area. Therefore, it is urgent to improve the waterway in order to secure the safety of ships using the waterway and improve the demurrage. This study proposed an improvement plan for the waterway through the analysis of the marine environment of the waterway and the process of collecting opinions from users in the sea area. and it was finally proposed to expend the width of the strait to 300m and secure a depth of 9.50m through Guidelines of Port and Harbor Design review and ship handling simulation evaluation. In addition it was evaluated that the vessel traffic congestions at peak-time in the situation of solo passage was greatly improved from 71.01% to 47.3% even when it was allowed to ship's crossing passage, as a result of vessel traffic congestions evaluation. According to the proposed improvement plan, the safety of ships' passage in the project area can be secured, and the issue of demurrage was also considered to be improved.

흰쥐에서 WGA-HRP와 pseudorabies virus를 이용한 정관의 신경로에 대한 연구

이창현,정옥봉,고병문,이봉희,김수명,김인식,양홍현,Lee, Chang-Hyun,Chung, Ok-Bong,Ko, Byung-Moon,Lee, Bong-Hee,Kim, Soo-Myung,Kim, In-Shik,Yang, Hong-Hyun 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.1

This experimental studies was to investigate the location of PNS and CNS labeled neurons following injection of 2% WGA-HRP and pseudorabies virus (PRY), Bartha strain, into the ductus deferens of rats. After survival times 4-5 days following injection of 2% WGA-HRP and PRV, the rats were perfused, and their brain, spinal cord, sympathetic ganglia and spinal ganglia were frozen sectioned ($30{\mu}m$). These sections were stained by HRP histochemical and PRY inummohistochemical staining methods, and observed with light microscope. The results were as follows ; 1. The location of sympathetic ganglia projecting to the ductus deferens were observed in pelvic ganglion, inferior mesenteric ganglion and L1-6 lwnbar sympathetic ganglia. 2. The location of spinal ganglia projecting to the ductus deferens were observed in T13-L6 spinal ganglia. 3. The PRY labeled neurons projecting to the ductus deferens were observed in lateral spinal nucleus, lamina I, II and X of cervical segments. In thoracic segments, PRY labeled neurons were observed in dorsomedial part of lamina I, II and III, and dorsolateral part of lamina IV and V. Densely labeled neurons were observed in intermediolateral nucleus. In first lumbar segment, labeled neurons were observed in intermediolateral nucleus and dorsal commisural nucleus. In sixth lumbar segment and sacral segments, dense labeled neurons were observed in sacral parasympathetic nuc., lamina IX and X. 4. In the medulla oblongata, PRV labeled neurons projecting to the ductus deferens were observed in the trigeminal spinal nuc., A1 noradrenalin cells/C1 adrenalin cells/caudoventrolateral reticular nuc., rostroventrolateral reticular nuc., area postrema, nuc. tractus solitarius, raphe obscurus nuc., raphe pallidus nuc., raphe magnus nuc., parapyramidal nuc., lateral reticular nuc., gigantocellular reticular nuc.. 5. In the pons, PRV labeled neurons projecting to the ductus deferens were ohserved in parabrachial nuc., Kolliker-Fuse nuc., locus cooruleus, subcooruleus nuc. and AS noradrenalin cells. 6. In midbrain, PRV labeled neurons projecting to the ductus deferens were observed in periaqueductal gray substance, substantia nigra and dorsal raphe nuc.. 7. In the diencephalon, PRV labeled neurons projecting to the ductus deferens were observed in paraventricular hypahalamic nuc., lateral hypothalamic nuc., retrochiasmatic nuc. and ventromedial hypothalamic nuc.. 8. In cerebrum, PRV labeled neurons projecting to the ductus deferens were observed in area 1 of parietal cortex. These results suggest that WGA-HRP labeled neurons of the spinal cord projecting to the rat ductus deferens might be the first-order neurons related to the viscero-somatic sensory and sympathetic postganglionic neurons, and PRV labeled neurons of the brain and spinal cord may be the second and third-order neurons response to the movement of smooth muscles in ductus deferens. These PRV labeled neurons may be central autonomic center related to the integration and modulation of reflex control linked to the sensory and motor system monitaing the internal environment. These observations provide evidence for previously unknown projections from ductus deferens to spinal cord and brain which may be play an important neuroanatornical basic evidence in the regulation of ductus deferens function.

플라즈마 에칭공정에 따른 산화물 박막의 광촉매 표면 특성

이창현,서성보,오지용,진익현,손선영,김화민,Lee, Chang-Hyun,Seo, Sung-Bo,Oh, Ji-Yong,Jin, Ik-Hyeon,Sohn, Sun-Young,Kim, Hwa-Min 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.5

$WO_3$, $SiO_2$, and $TiO_2$ films with hydrophilic property are deposited by rf-magnetron sputtering. Their wettability is strongly depends on the presence or absence of the oxygen plasma etching on the glass substrates. The $TiO_2$ film of 50 nm-thick on the plasma etched glass shows a water contact angle (WCA) below $5^{\circ}$ which means a super-hydrophilic surface. However, WCA values are gradually degraded when the films are exposed under atmosphere, especially $WO_3$. In order to improve hydrophilic property, the degraded films can be again recovered by UV illumination for 10 sec using UV-light and the $TiO_2$ film shows a super-hydrophilic surface about $3^{\circ}$.

수환경 화학사고 발생시 GPS 전자부자 표준실험법 적용을 통한 수질-수리 측정에 대한 연구

이창현,남수한,김영도,Lee, Chang Hyun,Nam, Su Han,Kim, Young Do 한국수자원학회 2023 한국수자원학회논문집 Vol.56 No.12

최근 화학사고 증가와 함께 사고로 인한 재해에 대한 건수가 2012년부터 계속적으로 증가하고 있으며 국내 화학물질 사고 대표 사례인 구미 불산 사고를 보았을 때, 사고현장에 적용 가능한 기술이 미흡하여 피해가 확산되었다는 결과가 발생하였다. 따라서 본 논문에서 수질오염사고 대응체계를 위치기반에 맞춰 화학사고 발생 시 수환경에서 실시간 대응을 위한 위치기반의 지표측정방식의 GPS전자부자를 이용한 대체지표 추적에 대한 측정방법과 그에 대한 연구결과를 소개하고자 한다. 연구대상지는 불산사고가 발생했었던 지역인 구미시를 대상으로 김천시와 구미시 등 2개 시 로 이루어진 감천을 선정하였고 해당 대상지에 수질-수리 측정을 통해 GPS전자부자를 이용한 대체추적물질 추적에 대한 실험을 진행하였다. 이를 통해 GPS전자부자를 이용한 추적자실험에 있어 수질-수리 측정이 동시에 가능하며, 특히 해당 연구결과를 통해 GPS 전자부자를 활용한다면 하천 분야에서의 유출사고에 대한 재난대응체계에 상당히 도움이 될 것으로 사료된다. Recently, along with the increase in chemical accidents, the number of accidents-related disasters has been increasing continuously since 2012, and when looking at the hydrogen fluoride incident which is a representative example of domestic chemical incidents, there is insufficient technology applicable to the incident site. The result was that the damage spread. Therefore, in this paper, we will adapt the water pollution accident response system to a location-based approach, and introduce a measurement method for alternative index tracking using a GPS electronic floater of a location-based index measurement method for real-time response in the water environment when a chemical incident occurs. The research target area is Gumi City, which is the area where the hydrogen fluoride incident occurred, and Gamcheon is selected, and alternative tracking using GPS electronic floater is conducted in the corresponding target area through water quality and flow measurement. As a result, it is possible to measure water quality and flow at the same time in tracker experiments using GPS electronic floater based on the research results, it is believed that using GPS electronic floater will be of great help in disaster response systems for spill incidents in the river.

반도체 광증폭기를 이용한 전계흡수 광변조기 비선형성 보상

이창현,손성일,한상국,Lee, Chang-Hyeon,Son, Seong-Il,Han, Sang-Guk 대한전자공학회 2000 電子工學會論文誌-SD (Semiconductor and devices) Vol.37 No.5

지수함수형태의 전달함수를 갖는 전계흡수 광변조기(electroabsorption modulator: EAM)의 비선형성 보상을 위해 로그함수형태의 전달함수를 갖는 반도체 광증폭기(semiconductor optical amplifier : SOA)를 이용한다. 우선 SOA의 전달함수는 EAM의 전달함수와 역함수 관계를 갖기 때문에 EAM의 상호변조왜곡 (intermodulation distortion: IMD)을 보상한다. 더불어 SOA가 제공하는 이득에 의해 변조신호는 증폭되어진다. 이 두 가지에 의해 EAM의 SFDR(spurious free dynamic range)은 증가한다. 이때 SOA는 EAM 뒷단에 직렬로 연결되어 이득포화영역에서 동작되어진다. EAM의 IMD 보상을 향상시키기 위해서는 SOA의 이득을 증가시켜 이득포화영역 기울기를 증가시켜야 한다. 하지만 SOA의 이득 증가에 따라 ASE 잡음도 증가하여 시스템의 잡음레벨을 높여 EAM의 SFDR은 감소한다. 즉 SOA의 이득포화영역 기울기와 ASE 잡음은 이득에 대해 trade-off를 가지게 되고 모의실험 결과 이득이 약 8㏈일 때 최적화 된다. 이 지점에서 EAM의 SFDR 향상은 약 9㏈였다. SOA를 사용한 EAM 선형성 향상 방법은 구성이 간편하고 3개의 소자를 집적할 경우 낮은 삽입손실, 낮은 편광의존성, 낮은 처핑 등 효율적인 아날로그 광변조기로 이용될 수 있다. To compensate the nonlinearity of electroabsorption modulator(EAM) resulting from its near exponential transfer function, a semiconductor optical amplifier(SOA) that has a log transfer function is used. Since the transfer function of SOA is inverse to that of EAM, the intermodulation distortion(IMD) of EAM can be reduced by cascading SOA to EAM. Also, the RF gain can be increased by the optical gain of SOA. For these reasons, spurious free dynamic range(SFDR) of EAM is enhanced by connecting SOA to EAM in series and operating in gain salutation region. To improve the nonlinearity compensation of EAM, the increased gain of SOA is required and the slope of gain saturation, the ratio of gain to input SOA power, needs to be steep. However, signal spontaneous beat noise that is the dominant system noise increases in proportion to the gain such that the SFDR of EAM is reduced. The higher the gain of SOA is, the more ASE is increased. Thus the noise level of system is increased and the following SFDR of EAM is decreased. The slope of gain saturation region and ASE of have trade-off relation and the optimization is achieved at 8㏈ optical gain. 9㏈ enhancement of SFDR of EAM is obtained. This scheme is easy to embody the linear EAM and the integration with three components (DFB-LD, EAM and SOA) offers many merits, such as low insertion loss, low chirping and low polarization sensitivity.