• Journal of Korean Academy of Nursing
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• v.45 no.1
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• pp.147-156
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• 2015

Purpose: This study was done to describe the return to work experience of military officers with cancer. Methods: Individual in-depth interviews with 15 participants were conducted between September 2013 and April 2014. Participants were interviewed 1~4 times; interviews continued until the data became saturated. Data were analyzed using Strauss and Corbin's grounded theory. Results: The core category emerged as "living a new life after enduring difficulties". The return to work process consisted of four sequential phases: chaos, positive thought formation, behavior practices, and reformation. Action/interaction strategies used by military officers with cancer to resolve enduring difficulties were controlling emotions, accepting reality, prioritizing health, making efforts to improve relationships, and looking for future jobs. Conclusion: These results will promote understanding of military officers' return to work experience following cancer survival, and will be helpful in developing more effective nursing interventions through enhanced perspectives and insights of practitioners.

• Women's Health Nursing
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• v.24 no.2
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• pp.126-137
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• 2018

Purpose: To evaluate the effectiveness of an experience-focused prenatal program on stress, anxiety, childbirth confidence, and maternal-fetal attachment for women in their first pregnancy. Methods: The participants were 57 pregnant women at 32 weeks or more of a first pregnancy who agreed to participate in this study. The data were analyzed with descriptive statistics, t-test, $x^2$ test, and Fisher's exact test using the SPSS 21.0 program. Results: The experimental group showed significant differences in stress, anxiety, childbirth confidence, and maternal-fetal attachment from the control group. Conclusion: The four-week experience-focused prenatal program can be used for women in their first pregnancy to reduce their stress and anxiety and to increase their childbirth confidence and maternal-fetal attachment.

• Bulletin of the Korean Space Science Society
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• 1992.10a
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• pp.19-22
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• 1992

We have computed the model spectra for the novae that formed dust grains shortly after their explosions. And the results are closely compared with recent infrared observational data. The amorphous carbon grains appear to be the major component for the carbon-rich novae. And the silicate grains which reside in Mira variables are found to be the best candidate material for the oxygen-rich novae. In novae, the winds from the central stars are very strong and fast so the emergent spectra are highly dependent on the time scales of dust formation. We find optically thin dustemission for oxgen-rich novae because they have longer time-scales of dust formation and the dust shells with larger radii.

• Carbon letters
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• v.16 no.3
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• pp.219-221
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• 2015

In order to study the impact of atmosphere during electron beam irradiation (EBI) of polyacrylonitrile (PAN) precursor fibers, the latter were stabilized by EBI in both air and oxygen atmospheres. Gel-fraction determination indicated that EBI-stabilization under an oxygen atmosphere leads to an enhanced cyclization in the PAN fibers. In the Fourier-transform infrared spectroscopy analysis, the PAN fibers stabilized by EBI under an oxygen atmosphere exhibited a greater decrease in the peak intensity at 2244 cm⁻¹ (C≡N vibration) and a greater increase in the peak intensity at 1628 cm⁻¹ (C=N absorption) than the corresponding PAN fibers stabilized under an air atmosphere. From the X-ray diffraction analysis it was found that oxygen uptake in PAN fibers leads to an increase in the amorphous region, produced by cyclization.

• Publications of The Korean Astronomical Society
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• v.7 no.1
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• pp.155-166
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• 1992

We observed a total of 14 Mira variables as well as 4 late type variable stars for their SiO ${\nu}= 1$, J = 2 - 1 maser lines from April 1989 to November 1990 with the 13.7 m radio telescope at Daeduk Radio Astronomy Observatory. The maser intensity variations were the prime objective of the observations which well covered the periods of the variations. The origion of the variations were studied by comparing wi th those previousely measured in optical and infrared(IR) wavelengths and we confirmed that the intensity variations were in good correlation with those in V magnitude and IR intensity as previousely found in former investigators in general. However, for a few sources, we could find the missing maxima. The intensities themselves also were in good correlation with SiO ${\nu}\;=\;1$, J = 1 - 0 maser intensities observed in Yebes as expected. The good correlations indicate that the pumping source of the SiO maser is likely to be the IR emission in the masing regions and the "missing maxima" that are apparent in two particular sources are considered to relate wi th the strength of shocks arising from the eruptive mass-loss from central stars.

• 한국전산유체공학회:학술대회논문집
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• 1998.11a
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• pp.1-6
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• 1998

From surface flow visualization on a MIRA notchback reference model using oil flow technique, the topology of the singular points of the skin friction lines are delineated. Separation and reattachment lines at the front screen, at the A-pillar, at the C-pillar and on the rear side of the car including the trunk have been identified. It is worth to mention that two vortices emerging from the top of the trunk coil in the opposite direction as that vortices starting from the C-pillar edge. The positions of the singular points and the separation and reattachment lines and the foci of the vortices provide a sensitive database for validation of CFD-codes

• Composites Research
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• v.29 no.4
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• pp.186-193
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• 2016

The development of electrospun nanofibers with improved mechanical properties is of great scientific and technological interest because of their wide-range of applications. Reinforcement of carbon nanotubes (CNTs) into the polymer matrix is considered as a promising strategy for substantially enhancing the mechanical properties of resulting CNTs/polymer composite mats on account of extraordinary mechanical properties of CNTs such as ultra-high Young's modulus and tensile strengths. This paper summarizes the recent developments on electrospun CNTs/polymer composite mats with an emphasis on their mechanical properties.

• The Mathematical Education
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• v.44 no.2 s.109
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• pp.201-213
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• 2005

The purpose of this study is to find research areas that were less represented by the researchers of mathematics textbooks and to provide feedback for the research and development of mathematics curriculum and textbooks. In order to complete this study, we analyzed comparative studies of mathematics textbooks published in Korean. This study analyzed 107 comparative studies published until recently based on following aspects: countries studied (North Korea, U.S.A., and Japan), Math curriculum studied (6th and 7th mathematics curriculum), and Math contents studied (probability and statistics) and etc. The result of this study suggests that the content area of creative problem solving was particularly less represented by the studies published and require more concern from the mathematics education researchers

• Journal of Photoscience
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• v.11 no.32
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• pp.47-53
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• 2004

A laser scanning fluorescence microscope system has been fabricated for single molecule detection (SMD). Problems associated with the system set-up have been discussed along with proper suggestions. Based on the SMD results obtained by using the apparatus, a statistical method has been suggested to determine the minimum number of required molecules to form a group of uniform average in a selected error range.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.2
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• pp.69.1-69.1
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• 2010

장주기 Mira 변광성의 외피층에서 발생하는 SiO 메이저에 대해 non-local한 1차원 수치계산 결과를 처음으로 제시한다. 별의 유체역학적인 맥동모델에서 얻은 시간에 따른 별 주위 가스의 속도, 온도, 밀도 분포를 사용하여 계산하였다. 임의의 속도장을 갖는 구형 분자운에서의 복사전달문제를 풀었던 이전 연구에서 개발한 수치계산코드를 이용하였고, 특정 구간에서 급격한 변화를 겪는 물리량을 잘 반영할 수 있도록 수정하였다. 또한 계산에 사용되는 거대희소행렬을 압축희소행렬로 변환하여 메모리를 절약하였고 비선형방정식의 자코비안을 해석적으로 구하여 계산속도를 향상시켰다. v=1, J=1-0, J=2-1과 v=2, J=1-0 SiO 메이저의 공간분포, 상대세기 등에 대해 이전의 LVG 모델을 이용한 연구결과와 정성적으로 비교 논의한다.