• 천문학회지
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• 제29권spc1호
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• pp.309-311
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• 1996

It is analysed the discrepancy about the coronal magnetic field between solar optic and solar radio using magnetic fibril concept with filling factor and fractal structure model. The magnetic field of $\~$ 100 G considered in solar optics is mean value in a large scale, and that of $\~$1000 G in solar should be the value of fine structures inside 'macro' loop.

• 천문학회지
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• 제29권spc1호
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• pp.323-324
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• 1996

In the present work we introduce a new flare activity indicator, MAD and examine its characteristics by analyzing a set of successive three days' observations of a typical active region, AR2372. The computed MAD is compared with conventional activity indicator such as separator. It is found that. (1) MAD traces very well the separator, (2) it. singles out. local discontinuity of magnetic field lines and (3) it. is a good measure of describing the evolutionary status of active region.

• 천문학회지
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• 제29권spc1호
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• pp.303-305
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• 1996

The evolution of solar magnetic arcades is investigated with the use of MHD simulations imposing resistivity on sheared magnetic fields. It is found that there is a critical amount of shear, over which magnetic reconnection can take place ill an arcade-like field geometry to create a magnetic island. The process leading to reconnect ion cannot. be solely attributed to a tearing instability, but rather to a reactive evolution of the magnetic arcade under resistivity. The natures of the arcade reconnection are governed by the spatial pattern of resistivity. A fast reconnection with a small shock angle can only be achieved when the diffusion region is localized. In this case. a highly collimated reconnect ion outflow can tear the plasmoid into a pair, and most of principal features in solar eruptive processes are reproduced.

• 천문학회지
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• 제29권spc1호
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• pp.317-319
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• 1996

Utilizing a Calcium filter, a large two ribbon flare of an importance 2.5Xj31? was recorded at. King Abdul-Aziz University Solar Observatory (KAAUSO) at the 30th of October 1991. This chromosphenc flare observation, which is of special importance since it is rarely reported, was for a flare that occurred near the south west of the equator at the vicinity of a large sunspot group on an active region known as AR 6891. The observed foot points of this flare had a strange behavior in which the separating motion of the ribbons were not typical of most flares, rather were nearly orthogonal. In this article we present the characteristics of the main sunspot group of this active region and try to investigate its evolution and fragmentation with time. Information regarding magnetic fields and velocity fields are necessary to understand the restructuring of the magnetic field pattern and plasma motion, and hence the changes that could lead to the occurrence of such an interesting flare.

• 천문학회지
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• 제36권spc1호
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• pp.63-73
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• 2003

Solar flares present a number of radiative characteristics indicative of kinetic processes of high energy particles. Proper understanding of the kinetic processes, however, relies on how well we can separate the acceleration from transport characteristics. In this paper, we discuss microwave and hard X-ray bursts as a powerful tool in investigating the acceleration and transport of high energy electrons. After a brief review of the studies devoted to the kinetic process of solar flare particles, we cast them into a simple formulation which allows us to handle the injection, trap, and precipitation of flare electrons self-consistently. The formulation is then taken as a basis for interpreting and analyzing a set of impulsive and gradual bursts occurred on 2001 April 6 observed with the Owens Valley Solar Array, and HXT/WBS onboard Yohkoh satellite. We quantify the acceleration, trap, and precipitation processes during each burst in terms of relevant time scales, and also determine ambient density and magnetic field. Our result suggests that it should be the acceleration property, in particular, electron pitch angle distribution, rather than the trap condition, that is mainly responsible for the distinctive properties of the impulsive and gradual flares.

• 천문학회지
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• 제36권spc1호
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• pp.29-36
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• 2003

Quiescent solar radiation, at microwave spectral regime, is dominated by gyroresonant and thermal Bremsstrahlung radiations from hot electrons residing in solar active region corona. These radiations are known to provide excellent diagnostics on the coronal temperature, density, and magnetic field, provided that spatially resolved spectra are available from observations. In this paper we present an imaging spectroscopy implemented for a bipolar active region, AR 7912, using the multifrequency interferometric data from the Owens Valley Solar Array (OVSA), as processed with a new imaging technique, so-called Spatio-Spectral Maximum Entropy Method (SSMEM). From the microwave maps at 26 frequencies in the range of 1.2-12.4 GHz at both right- and left-circular polarizations, we construct spatially resolved brightness spectra in every reconstructed pixel of about 2 arcsec interval. These spectra allowed us to determine 2-D distribution of electron temperature, magnetic field of coronal base, and emission measure at the coronal base above the active region. We briefly compare the present result with existing studies of the coronal active regions.

• 동의신경정신과학회지
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• 제24권spc1호
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• pp.89-100
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• 2013

Objectives : The purpose of this study is to investigate the researches about regarding Emotional Freedom Technique (EFT) and to understand the trends of Meridian-based Psychotherapy. Methods : Every article relevant to EFT was obtained from 'Pubmed' and Korean journal databases. Keywords used for searching included 'EFT' and 'Emotional freedom technique'. Results : 1) 5 reviews, 11 randomized controlled trials, 3 controlled trials, 1 single group comparative study and 4 case studies were searched. 2) Anxiety disorders were most frequently studied with EFT. Other studies included insomnia, depression and pain symptoms. EFT interventions were attempted in many different protocols and assessed with various tools. 3) Review articles indicated that meridian-based psychotherapies, such as EFT, are based on the meridian theory of oriental medicine. They evaluate EFT positively for its effectiveness on psychiatric diseases. Conclusions : EFT is increasingly studied and used in clinical practice of various fields. Objective evaluation tools and standardized intervention protocols are needed for the development of a new guideline for EFT.

• Ocean and Polar Research
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• 제25권spc3호
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• pp.393-397
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• 2003

The seawater exchange breakwaters can be effectively employed to conserve or enhance the water quality inside harbors by transmitting the exterior water into the harbor. In the present study, three shapes of the breakwater, that is, the flow conduit embedded type, the wave chamber type and the oscillating water channel type are compared far their water exchanging capability through regular wave experiments. The results show that the net influx of water appears differently depending on wave period for each breakwater type. The net influx of the wave chamber type is much greater than that of the flow conduit embedded type. It is also ascertained that the influx of the oscillating water channel type can be greatly enhanced by attaining the resonance condition inside the channel at the wave periods frequently occurring at the fields where the breakwaters are to be installed.

• Applied Biological Chemistry
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• 제48권1호
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• pp.82-88
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• 2005

새로운 2-alkoxyphenyl-3-phenylthioisoindoline-1-one 유도체(A & B)들의 치환기 변화에 따른 저항성(RPC; 95CC7303)과 감수성(SPC; 95CC7105) 고추역병 균주(Phyto pthora capsici)들의 살균활성에 대한 3차원적인 정량적 구조-활성관계(3D-QSAR)를 비교 분자장 분석(CoMFA) 방법으로 연구하였다. 정렬방법에 따라 field fit(FF) 보다는 atom based fit(AF) 정렬시에 양호한(AF>FF) 모델, A3 및 A7을 얻을 수 있었다. AF 정렬시, 부가적 설명인자로서 HOMO 및 LUMO 분자 궤도장이 추가된 H-bond와 standard field에서 유도된 균주별 두 모델의 cross-validated $r^2\;_{cv.}$값$(q^2=0.625{\sim}0.834)$과 non cross-validated 값$(r^2_{ncv.}=0.894{\sim}0.915)$에 근거하여 SPC 균주의 살균활성에 대한 모델, A7이 RPC 균주의 살균활성에 대한 모델, A3보다 양호한 예측성(q2)을 나타내었다. 두 균주에 대한 살균활성은 분자의 입체장$(66.8{\sim}82.8%)$, 정전기장$(10.3{\sim}4.6%)$ 그리고 분자 궤도장(SPC: HOMO, 12.6% 및 RPC: LUMO, 22.9%)이 영향을 미치는 중요한 요소이었다. 두 균주에 대한 선택성은 N-phenyl 고리상 ortho, meta-위치의 양하전과 S-phenyl 고리상 치환기의 친수성의 크기에 의존적이었다.

• 산업공학
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• 제17권spc호
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• pp.52-61
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• 2004

During the past decades automated storage/retrieval (AS/R) systems have been dominantly implemented in most industrial fields due to their handling efficiency and high utilization of storage space. Such AS/R systems consist of several modules each of which contains two racks and a S/R machine. This paper proposes a design of the hybrid AS/R module which can be adopted without too much initial expenditure by most of small-and-medium sized companies. The hybrid module consists of an AS/R module on the upper floor and a traditional warehouse module on the lower floor. For the AS/R module, analytical expressions of the expected travel times for the S/R machine and the elevator per operation are derived. The expected travel times represent the performance of the module and thus can be used for its economic design.