http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Duk Woo Park ) (검색결과 592 건)
- 무료
- 기관 내 무료
- 유료
-
Sol-Gel 스핀코팅법을 이용한 접촉연소식 마이크로 가스센서의 제작
박성진,이상문,임준우,이덕동 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
Catalytic gas sensor have been used for a long time due to their excellent sensitivity for gases. However, this type has a problem in power consumption. A new integrated catalytic gas sensor for detecting flammable gases or flammable vapours has been fabricated on silicon with thin film that is silicon nitride(1,500□)/ silicon oxide(3,000□)/ silicon nitride(1,500□) dielectric layer, and silicon micromachining techniques. A microsensor using sol-gel spin coated alumina film was fabricated. For this method, alumina film was improved porosity than other techniques, sputter. By adding catalyst solution in alumina sol, we have simple process and control catalytic quantity. Finally the power consumption of the fabricated device was about 100mW at the operating temperature.
-
김병우,류지근,박우진,박계원,김미정,임지은,백대현,최재덕,최윤호,이가현,이관,김덕수 東國大學校醫學硏究所 2002 東國醫學 Vol.9 No.1
수면, 기억 그리고 학습의 연관성은 실제 매우 복잡하다. 많은 연구에도 불구하고 명확한 연구결과는 아직 없다. 우리는 이 연구에서 평소와는 달리 시험 전날 수면 변화 양상이 집중력에 어느 정도 영향력을 미치는지 알아보고자 하였고, 이를 이용해 효율적인 수면 관리를 할 수 있는 기초자료로 삼고자 하였다. 동국대 의대 본과 1학년생 중 지원자 30명과 본과 2학년생 10명을 대상으로 평상시 상태와 시험 직후 수면이 부족한 상태에서 각각 K-PES TEST를 실시하여 총 8항목에 걸쳐 암기력, 판단력, 단순반응의 변화정도를 검사하였다. 또 설문조사를 병행하여 결과에 영향을 미칠 수 있는 다른 인자들도 파악하였다. 수면량에 대한 부호 숫자 짝짓기(순간 판단력)을 검사한 결과, 인간의 최대 생리학적 기능은 꼭 수면부족에 의해 좌우되는 것은 아니다. 그러나, 수면감소는 피로를 증가시키고, 동기부여를 감소시키나 단, 새로운 사실을 학습하는 데에는 큰 영향을 끼치지 않는다. 즉, 수면부족으로 장시간 깨어있는 것은 정확성과 반응성을 떨어뜨린다. 흡연에 대한 부호 숫자 짝짓기(순간 판단력)을 검사한 결과, 니코틴의 수면에 대한 상호관계는 알려지지 않았고, 인간의 감정이나 의식, 인식에 영향을 주는 것으로 알고있지만, 장기적은 측면에서 흡연이나 알코올은 인식능력과 무관한 것 같다. 카페인에 대한 숫자 외우기(암기력)검사 결과, 카페인은 spacial selective attention에는 특별한 영향을 주지 않지만 지각과정이나 주의 집중에 큰 효과를 주며, 인간의 의식 수행에 긍정적인 효과를 준다. 즉 카페인은 활력, 혼란, 피로상태를 변화시키고 visual analog scales에서 휴식상태에 가까운 양상을 나타낸다. 또 48시간 동안 수면을 취하지 않은 사람에게 카페인은 집중력과 장시간의 좋은 기분을 유지하게 하였다. 그러나 규칙적, 비규칙적으로 먹는 사람간에는 인지수행력의 차이를 보이지 않으며 상용자에서는 상당한 내성이 보인다. 수면패턴에 대한 숫자 더하기(순간 판단력)검사 결과, 집중력은 수면패턴에 의해서도 영향을 받고, 수면패턴이 바뀌게 되면 순간판단력을 저하시킨다. This study was performed to evaluate relationship of sleep and attention, and to control sleep effectively. We conducted a K-PES test of 40 medical students. K-PES contains eight elements, for example, simple response, selective response, color pairing, OddEven discrimination, number addition, number-symbol matching, memory, right-tapping, left tapping. Through these, we tested changes of memory, judgement, simple response. And we conducted a questionnaire survey to exclude bias. Results are as follows. As a results of number-symbol matching test, we know that sleeplessness is not complete responsible for physiologic function for humans. But, decreased sleep increases fatigue and decreases motivation, but no influence on learning new materials. So, long term sleeplessness decreases precision and responsibility. As a results of number-symbol matching test on smoking, a relationship of nicotine and sleep is not certain. A point of view in long term period, smoking and drinking is not related cognition, even if we know that those influence mood, consciousness and cognition. As a results of memory work test on caffeine, caffeine does not influence spacial selective attention, but mainly does perception, attention and consiousness process. Namely caffeine changes energetic activities, chaos, fatigue states and shows resting state in visual analog scales In sleeplessness for 48 hours, caffeine produced attention and good mood for a long time. But, in case of cognitive process no significance shows in regular or irregular diet. Regular diet shows high resistance. As a results of number addition test on sleep patterns, seep patterns influence attention, changes of sleep patterns decrease a moment judgement.
-
-
-
이덕희,문종국,배강우,이용환,김진하,박강원 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.3
This study was conducted to evaluate the blood lead levels in 141 pregnant women who were not occupationally exposed to lead and their umbilical cord, and to identify some differences in blood lead levels by living area. The subjects were all delivered at St. Benedict Hospital in Pusan and the blood lead levels were measured by graphite furance atomic absorption spectrophotometer. The summarized results were as follows. 1. The geometric mean lead levels in maternal and cord blood were 8.0±1.8μg/dl, 5.0±0.6μg/dl respectively. 2. Lead levels in maternal(8.7±1.7μg/dl) and cord blood(5.4μ±0.7μg/dl) of industrial area(n=24) were higher than residential area(n=124) which were 7.9±1.7μg/dl and 5.0±0.6μg/dl respectively(p<0.05). 3. Maternal blood lead concentration was significantly correlated to cord blood lead concentration(r=0.6090, p<0.001), but other variables(maternal age, paternal smoking, birth weight, etc) were not correlated.
-
-
공정제어에의 應用을 위한 마이크로 콤퓨터 시스템의 개발
李秀東,禹治水,李泰鎬,朴源深,黃德浩 울산대학교 1978 연구논문집 Vol.9 No.2
마이크로 프로세서를 이용한 디지탈 공정제어 수단이 고찰되었다. 관심의 초점은 분산-종합제어에 적합한 단말제어 프로세서에 두었다. 시험 제작된 프로세서는 8개의 제어 루우프를 운전하는 독립된 제어장치이며 동시에 종합제어를 위하여 상위 전산기와 데이타 교환이 가능하도록 설계 되었다. 주기적 샘플링에 의한 비례-적분-미분(PID)제어방식을 기본으로 하고 있으며 파라메터 값에 의하여 PI,PD등으로 축소될 수 있도록 하였다. 시험 장치에서는 주기를 2초로 하였는데 A/D변환기의 적절한 선정에 의하여 0.2초정도 까지는 쉽게 단축할 수 있다. 조작자용의 프로세서에 대한 고찰은 최소한의 기능을 가진 것에 한정하였으며 이는 실제 적용 현장과 관련하여 기능이 확장되어야 할 것이다. 사용된 마이크로 프로세서는 범용의 것으로 단말용에는 M6800계통을, 조작자용에는 SC/MP계통을 사용하였다. A microprocessor based digital process controller has been studied. The objective was to develope a stand-alone terminal processor for distributed on-line control systems. The prototype terminal proposed in this paper has the capability of handling eight independent control loops under the supervisory control of main computer and/or operator console. The control algorithm follows analog PID action based on periodically sampled data. The control action can also be reduced to PI,PD and so forth through parameter assignment. Availability of A/D converters to the authors limited sampling period to 2 seconds, but it could easily be reduced to 0.2 sec. employing appropriate A/D devices. The number of operational functions of console processor is kept minimum in this study, the expansion of which should be done for particular application. Hardware implementation was done with general purpose microprocessors; M6800 system for terminal and SC/MP system for console.
-
마우스의 BCG감염이 R.tsutsugamushi의 증식에 미치는 영향
김인재,전창덕,홍영권,정현택,이복수,장우현,김익상,박석돈 대한감염학회 1993 감염 Vol.25 No.2
It has recently been reported that gamma-inteferon(INF-r) and tumor necrosis factor(TNF) or lipopplysaccharide(LPS) activate macrophages to kill intracellular parasites by means of nitrc oxide (NO). It is now generally accepted that NO is the endothelium-derived relaxing factor, and that it also paticipates in the regulation of the nervous and immune systems. Activated macrophages form NO?? and NO?? from the terminal guanidino nitrogen atoms of L-arginine by the process now known to proceed via the formation of NO. This pathway is inhibited by the L-arginine analog(N?? monomethyl-L-arginine; N??MMA), forms L-citrulline as a co-product and is responsible for the cytotoxic action of macrophages. In this study, the authors found that INF-r and/or LPS induced murine macrophages to kill Rickettsiae tsutsugamushi in vitro and macrophages from BCG-infected mice got the host resistance against R.tsutsugamushi in vitro as well as in vivo. The rickettsicidal effect induced by the combination of INF-r and/or LPS induced mice got the host resistance against R.tsutsugamushi in vitro as well as in vivo. The rickettsicidal effect induced by the combination of INF-r and/or LPS can also be completely inhibited by N??MMA, leading to a dose-dependent inhibition of NO production. These datademonstrate that INF-r and/or LPS as well as BCG-activated macrophages mediate host resistance aganist R.tsutsugamushi infection through NO, which is necessary for the intracellular parasite.
-
-
Park, Gyung-Min,Kim, Seon Ha,Jo, Min-Woo,Her, Sung Ho,Han, Seungbong,Ahn, Jung-Min,Park, Duk-Woo,Kang, Soo-Jin,Lee, Seung-Whan,Kim, Young-Hak,Lee, Cheol Whan,Kim, Beom-Jun,Koh, Jung-Min,Kim, Hong-Kyu Williams & Wilkins Co 2015 Medicine Vol.94 No.21
<P><B>Abstract</B></P><P>It is not clear whether screening by coronary computed tomographic angiography (CCTA) and/or exercise electrocardiogram (ECG) can improve clinical outcomes and reduce costs in individuals without known cardiovascular disease (CVD).</P><P>In total, 71,811 consecutive individuals without known CVD who underwent general health examinations were enrolled. Using propensity-score matching according to screening tests, 1-year clinical outcomes and 6-month total and coronary artery disease–related medical costs were analyzed in separate groups: group 1 (CCTA [n = 2578] vs no screening [n = 5146]), group 2 (exercise ECG [n = 2898] vs no screening [n = 5796]), and group 3 (CCTA and exercise ECG [n = 2003] vs no screening [n = 4006]).</P><P>There were no significant differences in the composite outcome of death, myocardial infarction, and stroke in each matched group: group 1 (0.35% vs 0.45%, <I>P</I> = 0.501), group 2 (0.14% vs 0.28%, <I>P</I> = 0.157), and group 3 (0.25% vs 0.27%, <I>P</I> = 0.858). However, revascularization was more frequent in the CCTA screening groups: group 1 (2.02% vs 0.45%, <I>P</I> < 0.001) and group 3 (1.40% vs 0.45%, <I>P</I> < 0.001). Matched screening groups had higher 6-month total and coronary artery disease–related medical costs: group 1 ($777 vs $603, <I>P</I> < 0.001 and $177 vs $39, <I>P</I> < 0.001), group 2 ($544 vs $492, <I>P</I> = 0.045 and $12 vs $15, <I>P</I> = 0.611), and group 3 ($705 vs $627, <I>P</I> = 0.090 and $135 vs $35, <I>P</I> < 0.001).</P><P>In individuals without known CVD, CCTA screening with or without exercise ECG led to more frequent revascularization at the expense of higher medical costs, but did not decrease the 1-year risk of death, myocardial infarction, and stroke.</P>
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
