• 보건교육건강증진학회지
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• 제22권1호
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• pp.41-54
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• 2005

Purpose : This study was undertaken in order to find out the actual condition and barriers of health education in elementary school after introduction of 7th curriculum modification. Method: A questionaire was sent by mail on November 1, 2003, and received a total of 230 till November 30, 2003. Among them, 198 were included in fmal analysis. The collected data was analyzed through frequency, percentage, mean and standard deviation. Results : The results of this study were as follows: Among of the school health task, the most time spending task was emergency treatment and medication. The health education content which now being taught was sex education and prevention of drug abuse in the 6th grade, prevention of obesity in the 5th grade, emergency treatment, safety education in the 4th grade and prevention of disease of teeth in the 3rd grade. The most difficult problem in health education was pointed to no subject, no hour about health education by policy. Conclusion : It was necessary to formalize the health education subject, to ensure of health education hour by policy and to establish of extra health education room to improve health education at elementary school.

• 대한전자공학회논문지SD
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• 제46권11호
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• pp.1-7
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• 2009

본 논문에서는 short-channel intrinsic-body SDG SOI MOSFET의 문턱전압 도출을 위한 간단한 해석적 모델을 제시하였다. Intrinsic silicon 채널 영역 및 gate oxide 내에서의 2차원 Laplace 방정식을 반복법(iteration method)으로 풀어 각 영역 내에서의 전위 분포를 채널에 수직한 방향의 좌표에 대해 4차 및 5차 다항식으로 표현하였으며 이로부터 표면전위를 도출하였다. 표면전위의 최소치가 0이 되는 게이트 전압을 문턱전압으로 제안하여 closed-form의 문턱전압 식을 도출하였다. 도출된 문턱전압 표현식을 모의 실험한 결과, 소자의 parameter와 가해진 bias 전압에 대한 정확한 의존성을 확인할 수 있었다.

• 한국태양에너지학회 논문집
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• 제22권1호
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• pp.9-21
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• 2002

To develope chemical heat pump using available energy sources, solar heat and other kinds of waste thermal energy, we have studied the heat transfer rate in cylindrical bed reactor packed with calcined Dolomite. Two dimensional (radial and circumferential) Partial differential equations, concerning heat and mass transfer in packed bed of calcined Dolomite, are solved numerically to describe the characteristics of the reaction of calcined Dolomite and heat transfer. The results obtained by numerical analysis about two dimensional profiles of temperature and conversion of reactant in the packed bed reactor and the amount of exothermic heat released from the reactor are follows. It was found that all of calcined Dolomite packed bed kept the reaction temperature of about 750K throughout the entire part of the bed, immediately after the steam was introduced exothermic reaction of hydration was proceeded from the packed bed inpu to output and from wall side to center. The rate of thermochemical reaction depends on the temperature and concentration and it is also governed by the boundary conditions and heat transfer rate in the particle packed bed.

• 기본간호학회지
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• 제23권3호
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• pp.275-282
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• 2016

Purpose: This study was done to examine the relationship between nursing students' hearing levels and accuracy of blood pressure (BP) measurements. Methods: Participants were 107 students who had finished their fundamental nursing practice and clinical practicum and who used earphones. Data were collected from October 13 to November 30, 2014 and from April 30 to May 19, 2015. Students' hearing thresholds were examined using an audiometer. Students were assigned to take two BP measurements on BP measurement training simulators, but only the second measurement was used for analysis. Results: All nursing students' hearing levels were within normal range, and there was no significant difference found among the settings for diastolic blood pressure. However, there were significant differences between low systolic blood pressure (SBP) (below 120mmHg) and high SBP (over 140mmHg) (z=9.02, p=.011). Measurement error in SBP showed a positive correlation with hearing threshold in the right ear at frequencies of 1000Hz and 500Hz. Conclusion: Findings indicate that BP measurement error is correlated with hearing threshold at some frequencies. To reduce measurement error, nursing students should be provided with health education about hearing and to improve training for students, further studies need to examine other factors influencing BP measurement error.

• 한국직업건강간호학회지
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• 제22권2호
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• pp.149-158
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• 2013

Purpose: The purpose of the study was to identify factors related to turnover intention among Korean visiting nurses. Methods: The data from 192 of 208 nurses working in southern part of Korea were collected for analysis during in-service education in May 19~20, 2011. Descriptive statistics, chi-square tests, ANOVA, and logistic regression analysis were performed using SPSS 19.0 program. Results: Among the general characteristic factors, young, married, university graduation, lower satisfaction with income and longer work experience as a nurse were associated with higher odds of turnover intention. Organizational commitment was associated with low turnover intention. Way of coping was not statistically significantly associated with turnover intension. Conclusion: Stress from the organizational system was found to be the most important variable that explains the turnover intention in this study. Use of sensible communication methods and introduction of effective conflict resolution system is suggested to reduce turnover intention. Further research is recommended to identify the job demands and organizational systems of visiting nurses.

• 한국항공우주학회지
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• 제46권3호
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• pp.269-276
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• 2018

본 논문은 해군 항공의 창시자이자 우리 항공의 개척자이신 조경연 선생님의 업적을 기술하였다. 조경연 선생님은 한국전쟁에 중 버려진 미군 항공기의 부품을 활용하여 다수의 수상 정찰기를 개발하였다. 또한 자신의 주도하에 개발된 항공기들을 바탕으로 해군 항공대를 창설하여 초대 대장으로서 우리 영해의 수호에 헌신하였다. 이로써 우리 해군은 스스로 개발한 항공기를 운용하는 항공부대를 갖게 되었다. 이는 대한민국 해군의 영광스러운 쾌거이자 우리 항공역사의 진정한 시발점이다.

• 한국통신학회논문지
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• 제15권5호
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• pp.374-383
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• 1990

시각조사의 일은 대부분 숙련된 조사자에 의해 이루어지므로 시간이 경과 할수록 조사의 질은 감소한다. 그러므로 조사과정의 자동화가 요구되고 있으며, 실용적인 시각조사시스템을 위해서는 실시간에서의 데이터 처리능력, 다양한 입력물체에 대한 유연성 및 저렴한 시설비가 요구된다. 본 논문에서는 이러한 요구에 적합한 조사방법을 제안한다. 기존의 하드웨어 방식과는 달리 소프트웨어에 의해 조사데이터를 처리함으로써 조사시스템을 유연성 있게 하기 위하여 피라미드 데이터구조를 이용한 divide-and-conquer 기술과 간소화된 패턴 매칭방법을 결합한 시각조사 알고리즘을 제시한다. 이 방법에 의해 비교되는 패턴의 데이터 수를 감소시킬 수 있었고, 그 결과 조사속도를 줄일 수 있었다.

• 한국조경학회지
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• 제27권4호
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• pp.50-58
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• 1999

This study was carried out to investigate the growth characteristics and propagation methods of L. obtusiloba as a woody landscape plant. The results are obtained as follows: L. obtusiloba was dioecious shrub and shaped with bush type. Leaves were ovate, obtuse, cordate, 7.05 cm long, 7.20 cm wide, and petiole 2.0 cm long. Flowers of L. obtusiloba were diclinous. Soil acidity ranged from pH 4.06 to 5.53 with the lowest at the Mt. Soo-Ri. Mt. Soo-Ri located near factory district, which was considered to damaged by environmental deteoration. While soil organic matter was highest at Mt. Soo-Ri, inorganic nutrients were low. L. obtusiloba grows in the area with low soil acidity and low content of inorganic. Therefore it seemed to be tolerant to air pollution. L. Obtusiloba was high seed germination rate in the plug box and its shoots were longer than seeding box and softwood cutting of L. obtusiloba showed the rooting rate of 50% at 5,000ppm on June 23. To develop a mass propagation method of Korean native L. obtusiloba through an axillary bud culture as a woody landscape plant, about 2∼3 cm shoots induced from explant were subcultured to new media contained different growth regulators. Shoots multiplied most effectively on a WPM containing 1.0 mg/l BA, producing 5.5 shoots with a shoot length of 2.5 cm per shoot explant.

• 한국산학기술학회논문지
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• 제14권4호
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• pp.2055-2061
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• 2013

청정대체 에너지로 관심이 고조되고 있는 바이오 에탄올의 경제적 생산은 고유가 시대에 있어 매우 중요하다. 분리공정에서 성공적인 정류탑의 설계에는 정확한 기-액 평형치가 이용된다. 2성분 Ethanol/3-methyl-1-butanol 계에 대하여 정온하 즉 50, 55, 60, 65, 70, 75 및 $80^{\circ}C$에서 2성분 기-액평형측정치를 측정하고, 그 측정치를 이용하여 기액평형치를 추산하는 추산식을 이끌어 내었다. 측정치와 추산치를 비교 검토한 결과 ${\pm}0.0005$, ${\pm}0.0022$의 범위 내에서 잘 일치함을 확인하였다.

• Restorative Dentistry and Endodontics
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• 제14권2호
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• pp.1-4
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• 1989

To determine the thickness of coronal hard structure the minimal distance between pupal surface and outer surface of crown was measured by means of Bowley gauge on extracted first molars. Upper(28 teeth) and lower(24 teeth) were carefully collected from 30-39 years of age and male. The teeth were split mesio-distally through central pit. On the split surface various part which are deeply related in cavity preparation were measured (schematic drawing). The results were as follows: A : Distance from mesio-cervical enamel to pulp chamber surface. upper $2.63{\pm}0.19$(mm) Lower $2.18{\pm}0.27$(um) B : Distance from mesial chamber ceiling to mesial surface upper $2.75{\pm}0.34$ Lower $2.62{\pm}0.31$ C : Distance from mesial chamber ceiling to occlusal surface upper $3.82{\pm}0.51$ Lower $3.49{\pm}0.50$ D : Distance from distal chamber ceiling to occlusal surface upper $4.28{\pm}0.69$ Lower $3.90{\pm}0.52$ E : Distance from distal chamber ceiling to distal surface upper $2.79{\pm}0.45$ Lower $2.41{\pm}0.40$ F : Distance from disto cervical enamel to pulp chamber surface upper $2.49{\pm}0.24$ Lower $2.39{\pm}0.25$.