제브라피쉬에서 장신경계에 의한 장운동 조절

이명호,문현이,권영숙,맹학영,김철희 충남대학교 생물공학연구소 2011 생물공학연구지 Vol.17 No.-

EMTP MODELS를 사용한 거리계전기법 구현에 관한 연구

이명희,최해술,서용필,김철환 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2

This paper presents a new distance relay modeling techniques which avoids unnecessary computational procedure. A general-purpose simulation language, called MODELS, has been added to the software ATP(Alternative Transients Program) providing a new option to perform numerical and logical manipulations of variables of an electrical system. This language has been designed to replace the previous option TACS(Transient Analysis of Control Systems) which permits to simulate a control system in conjunction with a large power network. One purpose of this study is to build a structure for modeling of digital distance relays within EMTP MODELS. Contrary to the traditional methods, the new method using MODELS reduce the number of simulation steps in modeling the distance relay.

장기입원환자 관리 방해요인

이경석,윤석만,권희,이호,김혜경,조미자,한규남,김명성 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background: Recently the health insurance review agency tried to cut off the cost of unnecessary hospital stay. It is important to reduce the prolonged occupation of the hospital beds. However, there are some obstacles of the management for the prolonged bed occupation. We report our experiences and the problems of bed-control. Methods: To increase the rate of effective bed-usage, a task force was made. This team was consisted of 4 dctors, 2 nurses and 2 personnel of the administrative department. From December 20th 2001 to May 17th 2002, the task force analysed the rate, number and causes of the prolonged (more than 60 days, regardless of the disease entities) bed occupation. We announced and explained the necessity of bed-control and actively pressed to reduce the prolonged bed occupation. Results: The number of the prolonged bed occupation was 71 at the beginning of the management. It was reduced to 46 at best, then turned back to 65 at the end. It seems to be impossible to reduce the prolonged bed occupation until there are sufficient numbers of long-term care facilities. Aggressive bed control makes the sick patients to move every two or three months, it is never desirable. Conclusion: We cannot expect any Quality Improvements without improvement of the wrong system. Prior to the management for the prolonged bed occupation, it is necessary to build a sufficient number of long-term care facilities.

치과주조용 Ag-Pd-Zn-Sn-In 합금의 시효경화 특성

이재호,김명진,이희경,김형일,설효정 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.1

Cu가 첨가되어 있지 않고, 대신에 상대적으로 많은 양의 Zn 그리고 소량의 Sn과 In이 첨가된 치과주조용 Ag-Pd-Zn-Sn-In 합금의 시효경화 특성을 경도 시험, X선회절 실험, 주사전자현미경 관찰, 전자탐침 미소분석법으로 조사하여, 다음과 같은 결과를 얻었다. 1. 950℃에서 용체화처리된 시편을 500℃와 550℃에서 등온시효처리하면, 시효 초기에 경도가 완만히 상승하여 최고 경도에 도달하였고 최고 경도를 일정 기간 유지하고 나서 서서히 하강하였다. 2. 용체화처리된 시편은 Pd 원자가 고용된 Ag-rich α1상, Pd3Sn인 α2상, Pd2Zn인 α3상의 3상 공존이었고, 등온시효처리함에 따라 Ag-rich α1상에서 Pd-rich 상으로 추정되는 β상이 석출하였다. 3. 시효 초기의 경화는 Ag-rich 기지에서 Pd-rich 상의 석출로 인한 격자변형에 기인하는 것으로 추정된다. 4. 시효처리 시간을 연장함에 따른 과시효 연화는 입계에 Ag-rich α1상과 Pd-rich β상으로 된 층상조직의 석출과 조대화에 기인하였다. 5. Pd3Sn인 α2상과 Pd2Zn인 α3상은 시효경화에 기여하지 않았다. Age-hardening characteristics of a dental casting Ag-Pd-Zn-Sn-In alloy without copper (52.0 wt% Ag - 39.9 wt% Pd - 4.0 wt% Zn - 2.0 wt% Sn - 2.0 wt% In - 0.1 wt% Ir) was investigated by means of hardness test, X-ray diffraction study, scanning electron microscopic observations and electron probe microanalysis. The specimen solution-treated at 950℃ was three phases of the Ag-rich α1 phase containing Pd element, the α2 phase based on Pd3Sn and the α3 phase based on Pd2Zn, and the Pd-rich β phase was precipitated from the Ag-rich α1 phase by the isothermal ageing,. The initial hardening seemed to be attributed to coherency strains which were formed in the Ag-rich matrix by the precipitation of Pd-rich phase. Overageing with softening was due to the formation and coarsening of the lamella precipitates at grain boundaries, which were composed of the Ag-rich α1 and Pd-rich β phases. The α2 phase based on Pd3Sn and the α3 phase based on Pd2Zn did not contribute to the age-hardening of this alloy.

4개 간척 지구에 분포하는 식생과 토양 염류농도

이승헌,지광재,안열,노희명 한국환경농학회 2003 한국환경농학회지 Vol.22 No.2

토양 제염이 토양 화학성 변화와 식물 분포에 미치는 영향을 분석하여 간척농경지의 효율적인 관리방안에 대한 기초자료를 확보하고자 본 연구를 실시하였다. 방조제 체절전후 자연식생이 존재하는 9개 지점에서 식생분포 특징을 조사하고 2개 지점에 대해서는 토양과 식생가의 관계를 검토하였다. 9개 조사지점에서 11목, 14과, 46속, 49종, 8변종, 1품종등 총 58종류의 식생분포가 관찰되었고 자연상태를 잘 유지한 대호 식생보전구와 석문 국가공단 예정 부지에서의 출현종수가 다양하게 분포하였으며 해수를 유통시키고 있는 홍보지구나 만경강, 동진강 하구의 식생은 10 정도로 단순하였다. 9개 조사지점에서 가장 빈도가 높게 출현한 종은 벼과, 명아주과, 국화과에 속하는 나문재(Suaeda asparagoides (Miq.) Maakino), 객개미취(Aster tripolium L.), 갈대(Phragmites australis Trin.), 해홍나물(Suaeda maritima Dum.), 칠면초(Suaeda japonica Dum.), 천일사초(Carex scabrifolia Steud.) 토양에서 염류(Saline)토양으로 그리고 최종적으로 일반 토양으로 변화하였다. 명아주과의 식생은 염도(ECe)가 30 dS/m 전후인 토양에서 출현하여 10 dS/m까지 지속되고, 20dS/m전후에서 객개미취, 산조풀, 사데풀 등이 출현하였으며 10 dS/m 이하에서는 일반육상에서 볼 수 있는 식생종들이 출현하였다. 그러나 토양제염과 동시에 식생의 천이가 일어나는 것은 아니며, 외부에서 종자 등의 식물이 유입될 확률이 있어야하므로, 초기간척지의 식생을 조기에 정착하기 위해서는 토양검정을 통해 적정 염도에서 정착할 수 있는 식생의 인공식재 내지 종자 산파를 통해 촉진시키는 것이 효과적일 것으로 판단된다. This research was conducted to present reference data to be used as newly reclaimed tidal land management. We investigated vegetation succession at 4 reclaimed/reclaiming project areas and discussed relationship with soil and vegetation through investigation and analysis soil chemical characteristics at 2 areas. 14 families 58 kinds were investigated. Vegetation were various at Dea-Ho conservation plot and Seok-Mun National Industrial Area which are maintaining naturally. Vegetation were simple at Hong-Bo and Dongjin and ManKyong river areas which effected sea water. Common species that were investigated at 9 sites were Suaeda asparagoides, Aster tripolium, Phragmites australis, Suaeda maritima, Suaeda japonica, Carex scabrifolia. As soil desalinization progressing, soil classified at first saline-sodic soil, the next saline soil and then normal soil. Chenopodiaceae revealed at about 30 dS/m of soil W e and existed to 10 dS/m of soil ECe. At about 20 dS/m of soil ECe, Aster tripolium, Chlamagotis epigeios, and Sonchus brachyotus revealed and then non halophytes and commom plants at inland revealed at low soil ECe of about 10 dS/m However it was not to progress vegetation succession and soil desalinization at the same time, owing to input of seeds or plants etc from out-ecosystern So for promotion of vegetation at newly reclaimed tidal land, we proposed that it was very effective to plant artificially halophytes or suitable species through soil test.

폴리머 콘크리트 복합체를 이용한 교통안전 시설물 개발

이명호,이재철,이승우,서장일,박세희 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

폴리머 콘크리트 복합체를 이용하여 악천후에도 시인성이 좋고 주위의 경관과 어울리는 자동점멸 표지병을 개발하였다. 아날로그 회로에 비해 설계상의 난해한 점이 있으나 상대적으로 간편한 디지털 회로를 사용하여 자동점멸 회로를 구성하였으며, 작업의 능률을 높이고 개발비를 줄이기 위하여 OrCAD를 사용한 Simulation을 실시후 회로를 구성하였다. 표지병의 시공시와 같은 환경에서의 실험에서는 디지털회로의 작은 전류와 표지병간의 거리, 전선의 저항으로 인하여 클럭 및 클리어 신호에 전압강하와 상승/하강 시간의 증가가 나타났다. 표지병은 전자회로와 함께 설치되어야 하므로 방수성을 고려하여 표지병과 전자회로를 일체형으로 설계하였다. 실제 시공시의 환경에서 시행한 실험에서 나타난 문제점을 검토하였으며, 향후 연구방향에 관하여 고찰하였다. Using polymer concrete composite, the automatic-on/off road marker that is well distinguished in a bad weather condition of rainy or foggy day and is well harmonized with. Digital circuit that is hard to design but simpler than an analog circuit is used in designing the automatic-on/off circuit, and it order to raise the working efficiency and lower the development cost, OrCAD, a simulation tool of electric circuit, was used in simulating the circuit. In an experiment conducted under the circumstance of practical application, voltage drop and raising/lowering time increment in the clock and the clear signals are occurred because of small current of digital circuit and resistance of electrical line. Because that the road marker is assembled with the digital circuit, it is designed as one assembled unit by considering water proof. Some problems occurred in the experiment and the future work are discussed.

Micro-cavity형 광섬유 Fabry-Perot 간섭계의 형성 및 고감도 압력센서에의 응용

김명규,박동수,김창원,김진섭,이정희,손병기 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1

Because micro-cavity type optical fiber Fabry-Perot interferometric pressure sensor itself play a signal processing role, it has electrical safty and is immune to EMI(electro-magnetic interference). And it also has high sensitivity in the measured range and low sensitivity dependence on the thickness of diaphragm. Therefore it has many advantages, so it will be applicable to accelerate sensor, flow sensor, and microphone, etc.. In this paper, using silicon anisotropic etching technique and fiber optic sensing technique, micro-cavity type optical fiber Fabry-Perot interferometer was formed and a highly sensitive pressure sensor was fabricated. The fabricated micro-cavity type optical fiber Fabry -Perot interferometric pressure sensor showed repeatedly good output characteristics.

水熱合成에 의한 Pb(Mn_(⅓)Sb_(⅔))_(0.08)Ti_(0.495)Zr_(0.425)O₃계의 제조와 그 유전특성

洪昌熹,李明敎 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1

Formation of power and dielectric characteristics of the system Pb(Mn_(⅓) Sb_(⅔) _(0.08)Ti_(0.495) Zr_(0.425)O₃ by hydrothermal synthesis method are descrided. This ceramics by hydrothermal synthesis were formed above 160℃, reaction temperature. The grain size of powders were increased with the rising of hydrothermal reaction temperature and holding time. Sintering density and dielectric constant of sample was maximum nearby 220℃~240℃, reaction temperature.

부산 금정산일대 용천수, 지하수 및 지열수의 지화학적 특성

조명희,함세영,한석종,성익환,이병대,조병욱 부산대학교 환경문제연구소 1999 環境硏究報 Vol.17 No.1

Spring, groundwater and thermal water from the area and the vicinity of Mt. Geumjeong and Mt. Baekyang, Pusan city, has been sampled and analyzed for major and minor elements. According to the Piper diagram, spring water belongs to Ca^2^+-HCO_3^- and Na^+-HCO_3^- types, groundwater to Ca^2^+-HCO_3^- type, and thermal water to Na^+-CI^- type. Based on the phase stability diagrams of [Ca^2^+I/[H^+]^2, [Mg^2^^+I/[H^+]^2, and [Na^+I/[H^+] vs. [H_4SiO_4], spring water, groundwater and thermal water are mostly in equilibrium with kaolinite. The result of factor analysis shows three factors (factor 1,2 and factor 3) for the spring water, the groundwater and the thermal water which are represented by the influence of the dissolution of feldspar, calcite, anthropogenic sources (domestic and industrial wastes) and salt water.

都市主婦의 結婚 適應度에 關한 硏究

金惠貞,李蓮淑,任春淑,鄭明姬,曺鏞旬,黃智暎 효성여자대학교 가정대학 학도호국단 1984 家政大論集 Vol.3 No.-

We measured general marital adjustment of the housewives who ilve in Daegu. We analysed marital affectional expression, cohesion, consensus and satisfaction and also analysed marital adjustment according to the level of education or length or marriage. The results are as follows; 1. The level of general marital adjustment of the urban housewives was medium. 2. According to factor analysis, the level of marital affectional expression was medium, the level of marital satisfaction and consensus was high, and the level of cohesion was low. 3. The more educated, the higher the degree of marital adjustment in general. 4. The marital adjustment was lowest in housewives whose length of marriage was 9-11 years. The second lowest were 3-5 years and 21-23 years. The highest was 15-17 years.