• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.628-635
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• 2004

The characteristic of thin film resistor with low TCR( temperature coefficient of resistance ) and high precision are studied. The thin film resistor for 1/4W was fabricated and characteristic of these resistors was investigated. The fabricated device had the thickness of $2.48{\leqq}$ and the resistivity of $0.27{\omega}mm$. The electrical characteristic was evaluated by HP 4339B and 4284A instruments with HP l6339A. The profile of trimmed structure was also measured by non contact interferometer. The change of resistance and TCR increased with increasing roughness and resistance. To reduce the effect of stress annealing treatment was performed in the range of 563 to 623 K after trimming. The characteristic was improved after annealing. It is expected the fabricated device can be useful for high precision and low TCR. Fabricated thin film resistor has average deviation of resistance less than $0.35{\%}$ and TCR within 60.60ppm/K.

• 성인간호학회지
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• 제14권1호
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• pp.102-113
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• 2002

Purpose: This study was designed to identify the relationship between self reported climacteric symptoms, self concept and depression in middle aged women. Method: Data were collected through self-reported questionaires which were constructed to include a climacteric symptoms, self-concept and depression of middle-aged women scale. The subjects for this study were 102 women between 40-59 years of age living in P city. The data were analyzed by descriptive statistics, t-test, ANOVA, Pearson Correlation Coefficient. Results: The results obtained from this study were as follows : 1) The relationship between self reported climacteric symptoms and self concept was statistically significant with a negative correlation (r=-0.4862, P0.001). The relationship between self reported climacteric symptoms and depression had a statistically significant positive correlation (r=0.5393, P<0.001). The Relationship between self-concept and depression had a statistically significant negative correlation (r=-0.3769, P<0.001). 2) General characteristic variables significantly related to self reported climacteric symptoms were age (F=3.13, P<0.05) and frequency of pregnancy (F=3.24, P<0.05). General characteristic variables significantly related to frequency of self-concept were age (F=3.13, P<0.05), education level (F=2.97, P<0.05) and occupation (t=1.84, P<0.05). General characteristic variables significantly related to depression were age (F=3.12, P<0.05) and number of children (t=3.59, P<0.05). 3) The obstetrical characteristic variable significantly related to self-reported climacteric symptoms was the frequency of pregnancy (t=3.24, P<0.05). Conclusion: This study shows possible implications for nursing intervention for middle-aged women's health to prevent and relieve climacteric symptoms.

• 한국대기환경학회지
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• 제13권4호
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• pp.297-305
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• 1997

The experimental study by use of SPCP was fulfilled to remove toluene emitted from various industrial processes. First of all, discharge characteristic was experimented as the change of applied voltage and frequency. Then toluene removal characteristic was tested with the analysis of by-products. As a result, optimum electrical discharge condition was from 20.0 kHz to 25.0 kHz of frequency and from 3.5 kV to 4.0 kV of voltage range. The variation of applied voltage had a more important effect on the removal characteristic of toluene than the frequency variation. The toluene removal efficiency was proportioned to ozone concentration and retention time on discharge plate. It was dropped as increase of toluene concentration, but total treated volume of tolene per power consumption was high. The decomposed toluene was transformed to $CO, CO_2$ and particulates, and the rate of transformation to particulates was higher than CO and $CO_2$ at high toluene concentration. Particulates were increased from 0.017 $\mum$ to 0.3 $\mum$ range of size distribution.

• 한국콘텐츠학회논문지
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• 제16권10호
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• pp.196-205
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• 2016

본 연구의 목적은 2006년부터 2012년까지의 질병관리본부의 퇴원손상심층조사 자료를 바탕으로 결핵환자의 환자 특성과 입원 및 질병관련 특성, 의료기관 특성에 따른 의료이용 현황과 치료결과에 영향을 미치는 요인을 파악하고자 한다. 본 연구는 질병관리본부에서 제공하는 퇴원손상심층조사자료를 활용하였고, 제6차 한국표준질병사인분류(KCD-6)의 중분류상 퇴원시 주진단 코드와 부진단 코드가 결핵(A15.0~A19.9)인 환자를 추출하여 총 8,305건을 최종 분석에 사용하였다. 본 연구에서 수집된 자료는 통계 프로그램 SPSS 20(Statistical Package for the Science)을 이용하여 빈도분석, 교차분석(chi-square test)과 로지스틱 회귀분석을 실시하였다. 연구결과는 먼저, 환자 특성과 치료결과가 호전되었는지의 관련성에 있어서는 연령그룹이 20-39세, 40-64세, 65세 이상과 의료급여의 결핵환자가 호전될 확률이 모두 통계적으로 유의하게 높았다(p<0.000). 그 다음, 입원 및 질병관련 특성과 치료결과와의 관련성 분석에서는 A16, A17, A19(p<0.000)와 A18(p<0.002) 모든 결핵코드와 재원일수가 31-90일(p<0.000)과 91-180일(p<0.041)인 경우에 호전될 확률이 통계적으로 유의하게 높았다. 마지막으로, 의료기관 특성과 치료결과의 관련성 분석에서는 300-499(p<0.008), 500-999(p<0.011), 1,000병상 이상(p<0.015)과 도지역(p<0.041)의 경우 호전될 확률이 통계적으로 유의하게 높았다(p<0.015). 결과적으로 결핵환자 발생시 철저한 접촉자 조사 및 예방치료, 정기적인 검진을 통한 조기 발견 방안 등 정부에서도 성공적인 결핵환자관리 프로그램을 지원하고 이를 적절하게 뒷받침 할 수 있는 단기적 뿐만 아니라 중장기적으로 종합적인 정책을 추진해야 한다.

• Journal of applied mathematics & informatics
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• 제37권3_4호
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• pp.251-257
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• 2019

We study the orbit behaviours of recurrent, uniformly recurrent and Poisson stable points. we give conditons that a point is to be recurrent or uniformly recurrent by analyzing the behaviours of their orbits. Also, we study dynamical properties of equicontinuous points and points of characteristic $0^+$.

• 한국안전학회지
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• 제20권2호
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• pp.98-104
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• 2005

Saw dust concrete f3r finding out insulation characteristic was tested using test plate $30cm{\times}30cm{\times}5cm$. basically, molds f3r the test of compressive, tensile, normal without sawdust, $0.05\%,\;0.1\%,\;0.2\%,\; 0.4\%,\;0.6\%,\;0.8\%,\;1.0\%,\;1.2\%,\;1.4\%,\;1.6\%,\;1.5\%,\;2.0\%$, mixing proportion. heat conductivity of the saw dust concrete mixed with the above proportion was taken in this study. Thermal conduction of normal concrete depends on mixing proportion strength aggregate character, water content. all these items are specified here in fables. $1.8\%\~2.0\%$ saw-dust mising concrete shows as the faction as normal insulation material has its function. and the higher saw-dust mixing rate becomes, the thermal conduction becomes the less Then, the conclusions are that saw-dust using concrete has better insulation function than normal concrete.

• 한국군사과학기술학회지
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• 제3권1호
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• pp.207-217
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• 2000

A fire fighting characteristic by a single evaporating droplet in the case of a fire of military enclosure space was studied experimentally. Transient cooling of solid surface by water droplet evaporation has been investigated through controlled experiments using a heated brass cylinder. Quantitative predictions of droplet evaporation time and in-depth transient temperature distribution in solid have been made. The particular interest was in the removal of thermal energy from the heated cylinder by evaporative cooling. A $10{\mu}1$ single droplet is deposited on a horizontal brass surface with initial temperatures in the range of $90^{\circ}C{\sim}130^{\circ}C.$ The results can be summarized as follows; Evaporating droplet was divided into three different configuration. Evaporation time was predicted as a function of initial surface temperature ($t_c=492.62-6.89T_{s0}+0.0248T_{s0}^2).$ The contact temperature was predicted as a function of initial surface temperature( $T_{i}$=0.94 $T_{s0}$+1.4), The parameter ${\beta}_o$ was predicted as a function of initial surface temperature( ${\beta}_0$ : 0.O0312 $T_{s0}+0.932$)>)>)

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1789-1791
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• 1999

In consideration of piezoelectric characteristic and Temperature stability, 3-element system dopped with NiO, $Cr_2O_3$ well-known as Hardner and Stabilizer whose primary element is PZT was eximanated its structure, piezoelectric characteristics, dopping with Nio, $Cr_2O_3$. We think that piezoelectric Characteristic is developed, remenent polarization and $E_c$ can developed in specimens by dopping with NiO, $Cr_2O_3$ additive. also, electromechanical quality factor largely showed tendency of decrement. According to dopping NiO, $Cr_2O_3$ more.

• 한국임상보건과학회지
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• 제3권2호
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• pp.320-327
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• 2015

Purpose. This study was conducted to provide basic data for decrease campus life stress investigated survey on the socio-demographic characteristic and campus life stress of the dental hygiene students. Methods. The research subjects are the total 220 and it was analyzed with structured questionnaires. The collected data was analyzed by IBM SPSS ver. 20.0, a statistical program (IBM Co., Armonk, NY, USA) for the frequency and percentage, ANOVA, Regression. The result is as following Results. The campus life stress was statistically significant differences by in case of poor family reason (${\beta}$=0.287), the fourth grader(${\beta}$=0.151), pocket money a month(${\beta}$=-0.136). Conclusions. As the results of the reasearch, it is necessary support and expansion plan with systemized cooperation between the government and school to state scholarship, living expenses and worker's scholarship for decrease the campus life stress.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전기물성,응용부문
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• pp.220-222
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• 2004

The piezoelectric ceramics for a step-up piezoelectric transformer are desired large electromechanical coupling factor, high mechanical quality factor and good characteristic resonance frequency. In this study, the empirical formula of specimens is used $0.9Pb(Zr_xTi_{1-x})O_3-0.1Pb(Mn_{1/3}Nb_{1/3}Sb_{1/3})O_3$ (PZT-PMNS). The piezoelectric and dielectric characteristic are investigated by sintering temperature and value of x as functions of $Ti^{2+}$, $Zi^{2+}$ mol rate. MPB(morphotropic phase boundary) is defined in the x=0.522. Because it is appeared to the best piezoelectric and dielectric characteristic in the x=0.522, it can be application of step-up transformer.