과도한 운동으로 발생한 횡문근융해증에 의한 급성신부전증 1예

문철호,류보열,모성환,김태종,기장도,박용관,김용환,정종훈 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Rhabdomyolysis may be defined as a clinical and laboratory syndrome which releases muscle cell contents into the plasma, such as creatine phosphokinase, due to skeletal muscle injuries. It can be the result of many diverse causes including muscle disease, ischemia, genetic disorder, metabolic disorder, infectious disease, drugs, comatose state, trauma or vigorous exercise that can lead to acute renal failure as a complication. Since first reported in 1941, rhabdomyolysis-induced acute renal failure has been documented many times, and the major causes of this disease are carbon monoxide poisoning, snake bites, and etc in Korea Reports of acute renal failure after exercise-related rhabdomyolysis with myoglobinemia are rare. We report a case of acute renal failure caused by exercise-related rhabdomyolysis in a 20 year old man.

Gas分析에 依한 變壓器 內部異常 草期發見에 關한 硏究

柳京燮,蔡萬秉,宋瑋憲,張香東,洪壯厚,沈鶴輔,柳喆模 서울産業大學校 1976 논문집 Vol.9 No.1

For the development of reliability of electric Power supply. It is very important to Predict the internal troubles of the transformer on load as We prevent the accident previously to try the trouble shooting. We have the testing results by gas chromato graph as following Occasion; a) We can predict that H₂CH₄ generated from insulating oil is the symptom of over heated coil produced. b) We can predict that a lot of C₂H₂ and H₂ generated from insulating oil is the symptom of the insulation trouble and pyrolysis of insulating oil by are occured. c) In the case of CO₂ and CO is generated from transformer's insulation oil is the sign of insulation material for example press board and phenol resin over heated.

農村住居環境의 實態와 改善方向에 關한 硏究 : 全北의 郡部를 事例로

柳應敎,鄭喆謨 全北大學校 附設 都市및環境硏究所 1990 都市 및 環境硏究 Vol.5 No.-

This study is focused on the subject of the reestablishment of rural settlement living environment project orientation. As a results of the high rate economic development policy, rural settlement living environment quality was decreased by the rapid urban oriented migration and low investment of government. This trend was accelerated especially by the growth pole strategy during the last two decades. Recently, the Urgury Round being increased the problem on the rural agricultural sector serious. In this context, rural settlement living environment circulated the low development process and the gap of rural/urban living environment level was increased. The fundamental purpose of this study is to devise the direction of comprehensive rural settlement living environment planning to activate the rural settlement living environment project. In conclusion, it is necessary to establish the village comprehensive planning for enhancing the level of living condition of rural area. For this purpose, the rational comprehensive framework of rural settlement living environment, selective rural house supporting system, professional manpower of rural planning, large investment of government to rural sector, legislative and institutional reorganization act are prepared due to the rural situations.

工業廢物에서 非鐵金屬의 溶出에 對하여

柳喆模 서울산업대학교 1977 논문집 Vol.10 No.1

B-ISDN에서 비연결형 서비스 지원을 위한 CLS간 대역폭 재할당 알고리즘

신병철,류원모 충북대학교 컴퓨터 정보통신 연구소 2000 컴퓨터정보통신연구 Vol.8 No.1

본 논문에서는 Broadband Integrated Services Digital Network(B-ISDN)에서 비연결형 서비스를 지원하기 위한 비연결형 서버(Connectionless Server. CLS)간의 대역폭 재할당 알고리즘을 제안하였다. 이 방안에서는 버퍼의 임계치와 타이머를 사용하여 수신 노드와 송신 노드사이의 대역폭 재협상 과정이 일어나게 된다. 송신 노드의 버퍼가 임계치를 초과하면 대역폭 재협상이 시작되고, 대역폭은 수신 노드가 가지고 있는 타이머에 의해 주기적으로 일정분만큼 증가하게 된다. 그러나 충분한 대역폭이 할당되어 버퍼가 비게 되면 송신 노드는 대역폭을 줄이게 되고 이와 관련한 신호를 수신 노드로 보내게 된다. 시뮬레이션 결과에 의하면 제안한 알고리즘은 기존의 대역폭 재협상 알고리즘인 Variable Bandwidth Connection(VBC) 방식에 비해 패킷 손실률과 평균 지연 등의 성능이 더 우수하게 동작할 수 있음을 보여준다. In this paper, we propose a time-dependent dynamic bandwidth management algorithm that allocates the bandwidth between two Connectionless Servers(CLSs). If the queue in the source node exceeds the threshold, the source node starts to renegotiate the bandwidth by sending a bandwidth increment request message. The destination node allows incrementing a fixed amount until the source node sends a bandwidth release message and uses a timer to generate next allowable message. However, if the queue is empty for a fixed duration, the source node decrease the bandwidth by sending a bandwidth release message. Simulation results show the proposed algorithm offers a lower burst loss rate and average delay than those of the existing bandwidth reallocation algorithm. Variable Bandwidth Connection(VBC).

Controlling the Magnetic Properties of the Van der Waals Ferromagnet Fe₃GeTe₂

Hyejin Ryu,Se Young Park,Dong Seob Kim,Yu Liu,Jinwoong Hwang,Younghak Kim,Wondong Kim,Jae-Young Kim,Cedomir Petrovic,Choongyu Hwang,Sung-Kwan Mo,Hyung-jun Kim,Byoung-Chul Min,Hyun Cheol Koo,Joonyeon C 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.1

Identifying material parameters that affect magnetic properties of ferromagnets is key to optimize materials better suited for spintronics applications. Here, we propose an effective hole doping method to modulate the magnetic anisotropy of a van der Waals ferromagnet, and explore the physical origin of this effect. Experimental measurements of the doping and thickness dependent magnetic properties of thin Fe_3-xGeTe₂ show a significant suppression of the magnetic anisotropy with hole doping. From the measured and calculated doping dependent electronic structure, we find that the energy gain by the spin-orbit induced band splitting is reduced by the chemical potential shift associated with hole doping, which in turn reduce the magnetic anisotropy energy. The identified mechanism provides an understanding of the doping induced modulation of magnetic properties in Fe₃GeTe₂ thin films.

Sonographic findings of inguinal endometriosis.

Yang, Dal Mo,Kim, Hyun Cheol,Ryu, Jung Kyu,Lim, Joo Won,Kim, Gyo Young W.B. Saunders 2010 Journal of ultrasound in medicine Vol.29 No.1

<P>OBJECTIVE: The purpose of this series was to describe the sonographic findings of inguinal endometriosis. METHODS: This was a retrospective analysis of 3 cases of inguinal endometriosis. The following gray scale and color Doppler sonographic features were analyzed: size, shape, echogenicity, and blood flow within inguinal endometriosis. RESULTS: The size of inguinal endometriosis ranged from 3.1 to 4.2 cm (mean, 3.7 cm). All 3 cases were cystic lesions. Two of 3 cases were lesions with internal septa. On color Doppler sonography, 1 of the 3 cases showed a few flow signals within the lesion, whereas in 2 of the 3 lesions, no blood flow could be identified within the lesions. CONCLUSIONS: Although the sonographic features of inguinal endometriosis may be variable, endometriosis should be included in the differential diagnosis when unilocular and multilocular cystic masses are seen on sonography.</P>

플래시 메모리를 위한 멀티미디어 파일 시스템의 구조 설계

양학모 ( Hak-mo Yang ),한용철 ( Ryong-cheol Han ),류연승 ( Yeon-seung Ryu ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1

플래시 메모리는 비휘발성 메모리로서 데이터 접근 속도가 빠르고 전력 소비가 적으며 가볍고 충격에 강한 특징을 가지고 있다. 최근 플래시 메모리의 가격이 저렴해지고 용량은 커져가고 있기 때문에 대용량의 멀티미디어 파일의 저장 장치로서 플래시 메모리의 사용이 증가할 것으로 보인다. 본 논문에서는 플래시 메모리를 위한 멀티미디어 파일 시스템의 구조 설계를 기술한다. 주요 특징으로는 i-node를 데이터 블록과 분리된 i-node 영역에 로그 방식으로 기록하고, 삭제 연산이 잦은 i-node 영역을 이동할 수 있게 하여 마모도 평준화를 고려하였다. 파일의 데이터 블록은 멀티미디어 응용 프로그램의 특징을 고려하여 인덱스화된 이중 연결 리스트 구조로 관리한다.

중성자 수분측정기를 이용한 고속도로 포장의 계절별 함수량 변화 측정에 관한 연구

송관철,이상모,류순호,류관식,박무언 한국농림기상학회 2000 한국농림기상학회지 Vol.2 No.4

This study was carried out to provide the information on seasonal variations of water content under highway asphalt pavements which influence on the dynamic behaviour and durability of pavements, and to assess the correlation between water content and soil or meteorological factors. Total eight sites for water content measurement which included fives sites in Kyungbu, two sites in Honam, and one site in Youngdong Highway were selected considering the variations in geology, topology and meteorology factors over all the country. Water contents under asphalt pavements were measured up to 170cm depth every two week for total 13 months of August 1992 through September 1993 using neutron moisture meter(CPN-503DR). The range of water content (θ_w) at the upper soils of above 50cm depth was 7∼12% and was not quite different regardless of sites, except for Iseo site. However, soil water contents below 60 or 70cm depth were significantly different between the measurement sites, that is, the lowest water content was 5% at Kyungsan site and the highest water content was 20% at Iseo site. For all the sites, seasonal variations in water content during the experimental period were little, their range was within only 1 to 4%. Seasonal variations of water content in original or cutting area, which were 4% more or less, were slightly larger than in bedding areas, which were below 2%. Water contents under asphalt pavements had statistically significant positive correlations with silt and clay content in soil, but there were little correlations between water content and meteorological factors such as precipitation, relative humidity, mean air temperature, and wind velocity.

지방산계 추출제에 의한 이트륨과 유로피움의 분리

방경모 ( Kyung Mo Bang ),류호진 ( Ho Jin Ryu ),최민배 ( Min Bae Choi ),강호철 ( Ho Cheol Kang ) 한국공업화학회 2010 공업화학 Vol.21 No.5

최근 들어 전자산업의 발전과 함께 LED, 삼파장 형광등 등의 폐전기전자 제품들이 증가하고 있고, 이트륨 및 유로피움과 같은 희토류 금속이 이러한 폐전기전자 제품에서 발견되고 있다. 이에 이트륨과 유로피움의 분리회수를 위하여 탄소사슬 길이가 다른 지방산인 versatic acid, dodecanoic acid, tetradecanoic acid 및 hexadecanoic acid를 추출제로 사용하여 추출제의 농도변화 및 수용액의 pH 변화 등의 조건으로 용매추출실험을 행하였다. 실험결과에 의하면 이트륨과 유로피움의 추출 시 농도가 낮을수록 동일 pH에서 추출률이 저하되고 이에 따라 추출성분의 50%가 유기상으로 추출되는 pH (pH0.5)는 높은 pH쪽으로 이동하고 tetradecanoic acid를 추출제로 사용했을 때 이트륨과 유로피움의 분리능이 가장 높았다. tetradecanoic acid에 의한 이트륨과 유로피움의 추출기구는 추출제의 농도에 따라 변하고 있다. 즉 추출제의 농도가 0.1 M 이하일 때는 용매화가 없는 단일화학종 MR3로 추출되고, 0.1 M 이상일 때는 3개의 유기산 단위체가 용매화된 화학종 MR3·3RH로 추출된다. Recently, an amount of waste electronic devices such as LED and trichromatic fluorescent lamp has increased with the development of electronic industry. Reportedly, rare earth metals such as yttrium and europium have been discovered in the waste electronic devices. In order to improve the selectivity of yttrium and europium, the effects of the following factors on recovery experiment have been considered: i) fatty acids with various alkyl chain lengths, ii) the concentration of extractant, and iii) pH. The results show that the extraction efficiencies decrease at the same pH with decreasing the concentration of extractant and so pH0.5 (That value of pH in an aqueous phase at which the distribution ratio is unity at equilibrium: 50% of the solute is extracted (E = 0.5) only when the phase ratio is unity.) moves into higher pH. The highest selectivity of yttrium and europium was obtained with tetradecanoic acid as extractant. The extraction mechanism of yttrium and europium was varied with the change of concentration of the tetradecanoic acid. MR3 single-species was formed from the yttrium and europium ion in the extractant concentration less than 0.1 M. On the other hand, the yttrium or europium ion is solvated with three molecules of tetradecanoic acid monomer like MR3·3RH in the extractant concentration more than 0.1 M.