• 한국지형학회지
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• 제18권4호
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• pp.261-270
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• 2011

연구지역인 웅천천 유역은 차령산지의 남서쪽 말단부에 위치하여 황해와 맞닿아 있다. 본 연구는 지형 규모의 연계성 차원에서 차령산지에 발달한 지형선구조 체계가 국지적 시야의 연구지역 지형경관에 나타나는 바를 확인하여 기술·설명하고자 한다. 연구지역에서 확인되는 주요 지형선구조는 NE-SW, NNE-SSW, NNW-SSE, N-S, E-W 등의 방향이며, 그 중 NNE-SSW, NE-SW방향 선구조가 지형경관에 가장 뚜렷하게 반영되어 인식할 수 있다. 주요 산체와 곡지는 NNE-SSW 방향성을 지니며, NE-SW방향의 선구조 곡지는 비교적 규모가 크고, 저기복 구릉, 산록단구, 하안단구, 범람원 등의 다양한 지형요소가 발달하는 곳이 많다. 반면 NNW-SSE, N-S, E-W 방향 선구조 곡지는 대체로 좁고 깊지 않은 곡지로 나타나지만 선구조는 선명하게 유지하고 있다. 또한 연구지역의 선구조 곡지의 규모와 곡지를 흐르는 하천 차수 간에는 상관성이 없다.

• 한국광학회지
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• 제16권1호
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• pp.7-12
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• 2005

우리는 버퍼 가스가 포함된 Rb 원자 증기셀을 이용하여 $^{87}$ Rb원자 D$_1$전이선에서 원자결맞음에 의한 비선형 광자기 신호를 관측했다. 측정된 가장 좁은 비선형 광자기 신호의 선폭은 2$\pi$${\times}$464 Hz이고, 이 때 비선형 광자기 효과에 의한 미분형 신호의 peak-to-peak 변화에 해당하는 자기장의 변화는 약 1 mGauss로 측정되었다. 이러한 결과는 고감도 자기장 측정을 위한 광자계 연구에 응용될 수 있다.

• 한국통신학회논문지
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• 제35권8B호
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• pp.1217-1223
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• 2010

최근 선박의 기술 패러다임이 신개념 디지털 선박으로 이동하면서 IT기술이 결합된 고부가가치 조선산업을 창출할 수 있는 경쟁력 있는 IT조선 융복합 기술개발과 인력양성은 매우 중요하다. 본 논문에서는 IT조선융복합 전문인력을 양성하기 위한 교육 프로그램을 소개한다. 용복합 교과목 구성은 조선산업체를 대상으로 IT조선기술 수요조사를 실시하여 IT분야는 해상무선통신기술분야, 선박용 S/W솔루션기술분야, CAN and SAN 분야로 나누고 조선분야는 조선설계분야, 선박건조분야로 나누어 교과목을 도출하였다. 융복합 교육 프로그램 운영은 모든 부분에서 산업체 전문가를 투입하여 산업체 현장의 실무능력이 향상되고 바로 산업체에 투입할 수 있는 인력양성을 목표로 추진되었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.291.1-291.1
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• 2013

We examined the temperature-dependent structural and magnetic properties of HgI2 in the temperature range of 300~400 K. HgI2 is a diamagnetic material and can be used for X-ray or γ-ray detectors. DCmagnetization measurements on HgI2 showed that there is a small but distinguishable change in its diamagnetic properties near 375 K. The magnetic property change is not expected because Hg and I are known as nonmagnetic elements. X-ray diffraction (XRD) measurements revealed a structural transition in the temperature of 350~400 K. Temperature-dependent x-ray absorption fine structure (XAFS) demonstrated that the chemical valence states of both Hg and I did not changed in the temperature range of 300~400 K. However, XAFS revealed that the bond-length disorder was slightly increased in the temperature range, particularly, near Hg atoms. The structural changes of HgI2 are likely related to its diamagnetic property change. We will discuss the relation between the diamagnetic properties and local structural properties of HgI2 in detail.

• 한국산학기술학회논문지
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• 제13권10호
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• pp.4462-4470
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• 2012

본 연구는 수 과학의 과정중심 통합 활동이 유아들의 과학적 탐구능력과 태도에 미치는 영향에 대해 알아보고 현장에서의 효율적인 교수학습 및 환경구성을 마련하는데 연구의 목적을 두고 있다. 연구대상은 전라북도 I시에 위치한 W대학 부속 유치원 만3세 만5세 유아 89명을 대상으로 각 연령별 발달을 고려한 주제를 각각 선정하여 수 과학의 과정중심 통합 활동을 실행하였다. 자료 분석은 SPSS for Windows 프로그램을 이용하여 대응표본 t검증을 실시하였고, 결과를 요약하면 다음과 같다. 수 과학의 과정중심 통합 활동을 실시한 결과 과학적 탐구 능력과 과학적 태도를 구성하고 있는 각 하위 요인들이 연령별, 성별로 유의한 차이가 있는 것으로 나타났다. 이러한 결과는 수 과학 과정중심 통합 활동이 만3세 5세 유아들에게 긍정적인 영향을 주는 활동임을 시사하고 있다.

• 대한물리치료과학회지
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• 제31권2호
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• pp.75-89
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• 2024

Background: The purpose of this study is to examine the mediating effect of life satisfaction and moderating effect of physical activity on the effect of adolescents' perceived positive parenting on depressed. In addition, the present study explores the role of life satisfaction and physical activity in the relationship between adolescents' perceived positive parenting and depressed, which may help in the reduction and control of adolescent depressed. Design: This study utilizes data from the 2021 Korean Children and Youth Panel Survey. Methods: First, positive parenting attitudes have a significant positive effect on life satisfaction. Second, life satisfaction has a significant negative effect on depressed. Third, life satisfaction has a mediating effect on the relationship between positive parenting and depressed. Fourth, physical activity has a significant negative effect on depressed. Fifth, physical activity has a moderating effect on the relationship between life satisfaction and depressed. Finally, this study confirmed the mediating effect of life satisfaction and moderating effect of physical activity on the relationship between positive parenting attitudes and depressed. Conclusion: This study confirmed that life satisfaction and physical activity are positive resources for depressed in adolescents. Therefore, a system that promotes a positive outlook on life and voluntary physical activity is necessary to prevent and overcome depressed. In addition, it shows the need for arts and physical education as well as entrance examination-oriented subjects in the curriculum. The results of this study may provide a basis for the therapeutic approach of mental health physiotherapy in the treatment of adolescent depressed.

• 분석과학
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• 제8권4호
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• pp.519-527
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• 1995

The retention mechanism of Ni(II)-${\alpha}$-isonitroso-${\beta}$-diketone imine chelates in reversed-phase HPLC has been studied by examining the effect of temperature, mobile phase composition in acetonitrile-water mixture, and molecular structure on retention. The empirical retention equation was investigated to evaluate the properties of S (hydrophilic index). The value of the S index of the Ni(II) chelates decrease with the increasing column temperature and a linear relationship between S and log $k{_w}^{\prime}$ has been found. The results showed that the S index is influenced by the interaction between Ni(II) chelates and mobile phase. Molecular properties, van der Waals molar volume, polarizability and dipole moment, of the Ni(II) chelates were calculated by Cerius 2 program and the calculations were performed at Universal Force Field (UFF) model. The S value and log $k{_w}^{\prime}$ increase with decreasing the dipole moment of Ni(II) chelates.

• 한국CDE학회논문집
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• 제10권4호
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• pp.293-302
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• 2005

The research focused quantitative comparisons of protocols occurring in the architectural massing process using two different tools, three-dimensional(3D) modeler and traditional design tools, to aid architectural massing education. Through the protocol analysis from some experiments, the research identified the following conclusions: 1) Usage of traditional tools produced much higher protocol rate in proposing solution, evaluating proposed solution, explicitness of strategies. This result seemed to be from convenience of traditional tools causing faster visual cognitive cycle. 2) Usage of 3D modeler produced much higher protocol rate concerning attempts of making design vocabulary. The result indicated 3D modeler has relatively effective functions for mass generation and orientation, however it still has some weaknesses on display interface which cause designer's lower idea generations compared to traditional design tools.

• 수산해양교육연구
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• 제27권5호
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• pp.1310-1317
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• 2015

Two-phase flow boiling heat transfer in micro-channels was experimently investigated. The test section consisted of 15 rectangular micro-channels with a depth of 0.45mm, width of 0.20mm. The experiments were performed for heat fluxes ranging from 5.6 to 46.1kW/m2 and mass fluxes from 150 to 450kg/m2s using FC-72 as the working fluid. According to the results, at the low heat flux region, heat transfer coefficient strongly depends on the heat flux, while heat transfer coefficient at the high heat flux region was independent on the heat flux. Four correlations were used to predict the heat transfer coefficient. The measured heat transfer coefficient was compared with four correlations. It was found that Kaew-On and Wongwises's correlation well predicted the measured data, within the MAE of 40.3%.

• 천문학논총
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• 제22권2호
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• pp.35-41
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• 2007

We present the result of radial velocity observation of a W UMa type binary star EX Leo. We observed the star on February 16, 2003, using Long-Slit spectrograph of BOAO(Bohyunsan Optical Astronomical Observatory). Since the spectral lines are broad due to its fast rotation, it is difficult to distinguish two radial velocities from cross correlation function. Instead of cross correlation function, we used broadening function to develop our own code which estimate the radial velocity of the broadened line spectra. With our own code, radial velocities of primary and secondary stars are derived simultaneously. From the radial velocity curve fit, we obtained $K_1=50.24{\pm}8.29km/s$ and $K_2=254.05{\pm}20.984km/s$ respectively.