• Journal of The Geomorphological Association of Korea
• /
• v.18 no.4
• /
• pp.261-270
• /
• 2011

This study is to describe morphological linear anomalies manifested in the geomorphological landscapes of Woongcheon river-basin, situated in the western ends of Charyong Mountainous Range, and to elucidate their morphotectonic significance. The order of decreasing valley scale in the study area is NE-SW, NNE-SSW, NNW-SSE, N-S, and E-W series. The valleys of NE-SW lineament appear as the largest in the study area, having piedmont slope, terraces, low-relif hills. NNE-SSW lineament cross obliquely the geomorphological elements of the precedent lineament. NNW-SSE, N-S and E-W lineament cut the forms of higher orders showing NE-SW and NNE-SSW lineament. Scale of the linear valleys is not correlated with the order of streams. It is paradoxal that great valleys are not associated with the rivers of highest order. It owes to adaption of regional discharge system along the valleys exploiting the fracture resulted from succeeding tectonic accidents.

• Korean Journal of Optics and Photonics
• /
• v.16 no.1
• /
• pp.7-12
• /
• 2005

We have observed the nonlinear magneto-optic effect(NMOE) based on atomic coherence in $^{87}$ Rb D$_1$-line using the Rb vapor cell containing 50 Torr of Ne. The width of the NMOE signal was measured to be 2$\pi$${\times}$464 Hz, when the peak-to-peak B-field variation was 1 mGauss. The result of this work may be applied to a high-sensitivity magnetometer.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.35 no.8B
• /
• pp.1217-1223
• /
• 2010

Recently a technology paradigm of ship has been changed to digital ship, IT shipbuilding convergenced technology development and Human training is very important, that is important role of making high valued shipbuilding industrial development. In this paper, we introduce IT shipbuilding convergenced education program for training human of special skill. A course of study is made of analyzing a survey of IT shipbuilding convergenced core technology in shipbuilding industry. we surveyed marine wireless communication technology, S/W solution for vessel, and CAN & SAN technology in IT filed, and ship-building design and vessel construction technology in shipbuilding field. we put in industry specialist in our education program because we have a gole of training the person are adapted immediately in shipbuilding industry.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.08a
• /
• pp.291.1-291.1
• /
• 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.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.10
• /
• pp.4462-4470
• /
• 2012

This study aims to examine the effects of process-based integrated Mathematics Science Activities on children's science process skills and scientific attitudes and arrange efficient teaching and learning environment in the field. The subjects of research were 89 three-year and five-year old children attending kindergarten attached to W university in I city, Jeollabuk-do and process-based integrated Mathematics Science activities were conducted with themes. For data analysis, paired t-test was conducted with SPSS for Windows program and as a result of performing process-based integrated Mathematics Science activities, it was found that there were significant differences in sub-factors of science process skills and scientific attitude by age and sex. These results suggested that process-based integrated activities had positive influences on three-year and five-yeard old children.

• Journal of Korean Physical Therapy Science
• /
• v.31 no.2
• /
• pp.75-89
• /
• 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.

• Analytical Science and Technology
• /
• v.8 no.4
• /
• pp.519-527
• /
• 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.

• Korean Journal of Computational Design and Engineering
• /
• v.10 no.4
• /
• pp.293-302
• /
• 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.

• Journal of Fisheries and Marine Sciences Education
• /
• v.27 no.5
• /
• pp.1310-1317
• /
• 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%.

• Publications of The Korean Astronomical Society
• /
• v.22 no.2
• /
• pp.35-41
• /
• 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.