• Proceedings of the Korea Society of Design Studies Conference
• /
• 1998.04a
• /
• pp.4-5
• /
• 1998

• Journal of The Korean Astronomical Society
• /
• v.6 no.1
• /
• pp.1-8
• /
• 1973

Presumable explosion time of Cas A has been listed from Dec. 6, 1592 to Mar. 5, 1593 in ancinet Korean observational records. It may have been overlooked, due to other supernova(Cassiopeia Nova) which appeared at that time near its original position of Cas A.

• The Bulletin of The Korean Astronomical Society
• /
• v.27 no.1
• /
• pp.44-44
• /
• 2002

• Publications of The Korean Astronomical Society
• /
• v.30 no.2
• /
• pp.655-657
• /
• 2015

The Australia Telescope National Facility (ATNF) consists of the Parkes and Mopra radio telescopes, and the Australia Telescope Compact Array, with the first elements of the wide-field Australian Square Kilometer Array Pathfinder (ASKAP), currently being commissioned. The capabilities of these facilities are described.

• 월간산업보건
• /
• s.331
• /
• pp.56-64
• /
• 2015

• The Bulletin of The Korean Astronomical Society
• /
• v.25 no.1
• /
• pp.17-17
• /
• 2000

• Journal of The Korean Astronomical Society
• /
• v.29 no.spc1
• /
• pp.1-5
• /
• 1996

Recent discussions of observational constraints on the standard hot big bang model are reviewed and it is argued that now there is room for considering alternative cosmologies. The quasi-steady state cosmology is briefly described. This model seems to explain most of the observed features of the universe, including the m-z relation, radio source count, the light nuclear abundances and the microwave background.

• The Bulletin of The Korean Astronomical Society
• /
• v.40 no.1
• /
• pp.65.2-65.2
• /
• 2015

We developed a three-dimensional magnetohydrodynamic (MHD) code to reproduce the structure of a solar wind, the properties of a coronal mass ejection (CME) and the interaction between them. This MHD code is based on the finite volume method incorporating total variation diminishing (TVD) scheme with an unstructured grid system. In particular, this grid system can avoid the singularity at the north and south poles and relax tight CFL conditions around the poles, both of which would arise in a spherical coordinate system (Tanaka 1994). In this model, we first apply an MHD tomographic method (Hayashi et al. 2003) to interplanetary scintillation (IPS) observational data and derive a solar wind from the physical values obtained at 50 solar radii away from the Sun. By comparing the properties of this solar wind to observational data obtained near the Earth orbit, we confirmed that our model captures the velocity, temperature and density profiles of a solar wind near the Earth orbit. We then insert a spheromak-type CME (Kataoka et al. 2009) into the solar wind to reproduce an actual CME event. This has been done by introducing a time-dependent boundary condition to the inner boundary of our simulation domain. On the basis of a comparison between a simulated CME and observations near the Earth, we discuss the physics involved in an ICME interacting with a solar wind.

• Korean Journal of Child Studies
• /
• v.29 no.6
• /
• pp.225-243
• /
• 2008

본 연구는 아동의 학습 과제 수행 이후에 보이는 부모와 아동의 정서적 반응이 문화에 따라 어떠한 차이를 나타내는지 알아보기 위해 한국계 이민자 가정과 백인가정을 대상으로 실시하였다. 미국 서북부 시애틀 지역의 8에서 9세 사이의 자녀를 둔 31 한국계 가정과 31백인 가정이 연구에 참여하였다. 연구를 위해 각 가정을 방문하였고 각 가정의 부모와 아동의 정서 반응을 비디오로 촬영하여 비교 분석하였다. 컴퓨터를 이용한 초 단위 행동 분석 결과 아동이 과제에 실패했을 때 한국계 어머니들과 아동들의 긴장과 불안 행동이 미국 백인 어머니들과 아동들보다 더 많이 나타났다. 아동의 과제 실패시, 어머니들의 부정적인 정서표현도 한국계 이민자 가정에서 더 많이 표출되었다. 아동들이 과제에 성공했을 때는 미국 백인 어머니들과 아동들이 좀 더 긍정적인 정서 반응을 많이 하였고 특히 백인 어머니들이 적극적 칭찬 등의 긍정적인 피드백을 주었다. 흥미 있게 아동들의 과제 성공 후에도 한국계 이민자 가정의 어머니들이 부정적인 정서 표출이 더 많았다. 자녀의 성에 따른 상호작용의 차이를 알아본 결과, 한국계 이민자 가정에서는 성차가 나타나지 않았고 미국 백인 가정의 부모들이 남자아이들에게 더 긍정적인 정서 표현을 보였다.

• Korean Journal of Biological Psychiatry
• /
• v.19 no.4
• /
• pp.172-178
• /
• 2012

Data from clinical studies are needed for psychiatrists to make quick and scientific decisions based on the best available evidence in clinical settings. Various methods of clinical studies are useful for clinicians to have reliable answers to unmet clinical needs. Although randomized controlled trials may provide high-quality information about major issues, well-designed, naturalistic and observational studies often give us unbiased explanation for real-world phenomena. Adequate selection of clinical variables and appropriate number of participants are key factors of well-designed clinical studies. Statistical methods can add an extra dimension to initial design of clinical studies. Given ethical issues in clinical studies on psychiatric disorders, special regards should be paid to participants' ability to provide informed consents. New strategies of clinical studies need to be developed to meet clinical needs and protect the rights and welfare of study participants.