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이태근,채종민,Lee, Tae-Geun,Chae, Jong-Min 대한수사과학회 2006 대한수사과학회지 Vol.1 No.1
The purposes of fire investigation are to identify and analyze the causes of fire and, using the results in promoting fire fighting policies, ultimately to prevent fires caused by similar causes and to protect people's life and properties from fire. However, although the patterns of fire are getting more diverse and complicated with the rapid development of industry, complicated with the rapid development of industry, fire fighting organizations are continuing traditional superficial fire investigation without operating a fire investigation department for the reason of insufficient manpower, equipment and budget, losing public confidence. Thus, the present study purposed to propose plans to improve the technicality of fire investigation and win public confidence in fire investigation. First, the technicality of fire investigation should be improved by operating a department and personnel exclusively for fire investigation. Second, fire investigation should be more scientific and precise using high tech fire investigation equipment. Lastly, responsible fire fighting administration should be realized through statistical analysis of the causes of fire and computerization. The results of this study are expected to contribute to the safety and security of our society.
$Y_2O_3-ZrO_2$를 $Al_2 O_3$ 매트릭스에 분산시 응력 유기 상변태의 효과
이태근,임응극,김환,Lee, Tae-Keun,Lim, Eung-Keuk,Kim, Hwan 한국세라믹학회 1985 한국세라믹학회지 Vol.22 No.1
The effect of stress induced phase transformation on $Al_2 O_3$ matrix dispersed with $ZrO_2-Y_2O_3$ has been studied. In order to determinate the mechanical properties three $Al_2O_3-ZrO_2$ composite series containing 1, 3 and 5 mole% $Y_2O_3$ were prepared. The starting materials were $Al_2O_3$ and $ZrO_2-Y_2O_3$ which was prepared from the aqueous solution of high purity $YCl_3$.$6H_2O$ and $ZrOCl_2$.$8H_2O$. Powder mixtures of $Al_2O_3-ZrO_2$ containing $Y_2O_3$ have been prepared by ball-milling with methanol and the samples were formed by isostatic press and sintered at 150$0^{\circ}C$ for 2hrs. After sintering. the specimens were polished for mechanical determination. The relative density of sintered specimens were also measured. It was found that the addition of 1, 3mole% to {{{{ { ZrO}_{2 } }} allowed full retention of the tetragonal phase in $Al_2O_3-ZrO_2$ but partially stabilized zirconia (PSZ) was produced by additions of 5 mole% $Y_2O_3$.The critical stress-intensity factor KIc of $A_2O_3-ZrO_2$ (containing 1 mole% $Y_2O_3$) composite materials increased with increasing $ZrO_2$ content, The maximum value of KIC=7Mn/$m^3$/2 at 20 mole% $ZrO_2$ exhibited about twice that of the $Al_2 O_3$ The modulus of rupture exhibited a trend similiar to KIC The maximum value of MOR was 580MN/m2. As the amount of Y2O3 increase it was observed that the maximum of KIC and MOR decreased : Additions of 3 mole% $Al_2O_3$ $Y_2O_3$ allowed the maximum of KIC 6MN/$m^3$/2 MOR 540MN/$m^2$ at 15 mole% $ZrO_2$ additions of 5 mole% $Y_2O_3$ allowed the maximum of KIC 5MN/$m^3$/2 MOR 410MN/$m^2$ at 10 mole% $ZrO_2$.
NAS를 위한 신뢰성과 확장성이 있는 저장 장치 시스템
이태근,강용혁,엄영익,Lee, Tae-Keun,Kang, Yong-Hyeog,Eom, Young-Ik 한국정보처리학회 2003 정보처리학회논문지D Vol.10 No.7
대용량, 고속의 멀티미디어 서비스가 일반화됨에 따라 컨텐츠를 저장하는 서버의 저장 장치 또한 대용량화되고 있다. 그러나 서버를 구성하는 다른 하드웨어 구성 요소에 비해 상대적으로 느린 저장 장치의 입출력 속도와 물리적 또는 논리적인 오류는 시스템 전반의 성능을 저하시키는 원인이 되고 있다. 또한 컨텐츠의 지속적인 증가로 인한 유연한 확장성이 필요하게 되었다. 본 논문에서는 이러한 문제점을 해결하기 위해 소프트웨어 RAID 사용하여 저장 장치의 성능을 향상시키고 신뢰성을 높였으며, LVM을 사용하여 저장 장치에 확장성을 부여하였다. 리눅스 커널 2.4.x에서 제공하는 이러한 기능들을 사용하여 신뢰성과 확장성이 있는 저장 장치를 구현하고 성능을 평가하였다. The rapid growth of high speed multimedia services demands the large capacity of the server's storage that maintains the multimedia contents. Among the server's devices, the low I/O speed and physical or logical failure of storage device decrease the total performance of system. The continuous increase of multimedia contents require the flexibility of storage capacity. In order to solve the these problems, we propose the uses of software RAID and LVM techniques that provide the performance improvement and reliability of storage device and the flexibility of storage device respectively. In the LINUX 2.4 kernel, we implemented the reliable and flexible storage device and evaluated the performance of it.
류마티스 관절염에서 발생한 Cerebral Aspergillosis
이태근 ( Tae Kun Lee ),최재훈 ( Jae Hoon Choi ),최철웅 ( Cheul Woong Choi ),이상용 ( Sang Yong Lee ),이준희 ( Jun Hee Lee ),이정욱 ( Joung Wook Lee ),김상수 ( Sang Soo Kim ),김성일 ( Sung Il Kim ) 대한류마티스학회 2003 대한류마티스학회지 Vol.10 No.4
We report a case of aspergillosis of the central nervous system in patient with rheumatoid arthritis (RA). A 46-year-old woman with 20-year history of RA and on treatment with corticosteroid, hydroxychloroquine and methotrexate, was admitted because of drowsiness, dizziness and dysarthria. On admission, physical examination and laboratory data showed, among other findings, disappearance of pupil reflex, positive Babinski and Chaddock reflex. Magnetic resonance imaging (MRI) of brain showed multiple high signal intensity lesion on medulla, pons, midbrain, basal ganglia, internal capsule, thalamus and hypothalmus. Stereotactic brain biopsy was performed and biopsy specimen revealed an invasive Aspergillus.
원발성 폐암 환자의 혈청에서 DAP kinase 유전자의 Methylation 양상
이준희 ( Lee Jun Hui ),이정욱 ( Lee Jeong Ug ),정경식 ( Jeong Gyeong Sig ),김기욱 ( Kim Gi Ug ),이태근 ( Lee Tae Geun ),이경우 ( Lee Gyeong U ),나민아 ( Na Min A ),전두수 ( Jeon Du Su ),최영민 ( Choe Yeong Min ),김윤성 ( Kim Yun S 대한결핵 및 호흡기학회 2003 Tuberculosis and Respiratory Diseases Vol.55 No.4
IPMSM의 Hole에 의한 Rib의 두께 감소와 전자기적 성능 향상
이태근(Tae-Geun Lee),김도진(Do-Jin Kim),홍정표(Jung-Pyo Hong) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Interior permanent magnet synchronous motor [IPMSM] which has high power density is applied to motor for Hybrid electric vehicle[HEV], Electric vehicle[EV], Fuel cell electric vehicle[FCEV] and electric home appliances. In order to improve efficiency performance of IPMSM, this paper presented a study by making a hole around air barrier. Because concentrated rib stress is distributed by suitable hole, the hole can reduce rib thickness of IPM rotor. And it can help decrease PM[Permanent Magnet] leakage flux. Saliency ratio(L<SUB>q</SUB>/L<SUB>d</SUB>) is also increased by magnetic circuit change. For this study, structure analysis of rotor is performed by Ansys program.
재하시험에 의한 댐체 공도교 거동변화 분석 및 안전성 평가
이태근 ( Lee Tae Geun ),최홍석 ( Choi Hong Seok ),이경수 ( Lee Kyeong Su ),최재곤 ( Choi Jae Gon ),오정근 ( Oh Jeong Keun ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
Load test is performed to obtain the data to evaluate load carrying capacity and check static & dynamic characteristics of a structure by estimating the real behavior of bridge due to loading the load. The subject facility in this paper is a bridge located on the spiilway of dam and traffic is relatively less than most brige. Considering the age and operation rules of a dam, however, load test and structure programming analysis were performed to check current conditions for structure under in-depth inspection and the results of that analysis are shown.