• 천문학회보
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• 제35권2호
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• pp.25-25
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• 2010

With the aim of resolving important physical problems in the chromosphere of the Sun, we developed the Fast Imaging Solar Spectrograph for several years, and at last successfully installed it in the Coude room of the 1.6 meter New Solar Telescope at Big Bear in 2010 May. The instrument is an Echelle spectrograph with imaging capability based on slit scan, and can record two spectral bands (e.g., H alpha band and Ca II 8542 band) simultaneously. The early runs of the instrument produced data of high quality that are suited for the study of quiet Sun, filaments on the disk, prominences outside the limb, active regions and sunspots. We are ready to do good solar sciences using our own instrument, and will be able to do best sciences with the coming improvement of spatial resolution.

• 천문학회지
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• 제54권2호
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• pp.61-70
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• 2021

We investigate 20 post-coronal mass ejection (CME) blobs formed in the post-CME current sheet (CS) that were observed by K-Cor on 2017 September 10. By visual inspection of the trajectories and projected speed variations of each blob, we find that all blobs except one show irregular "zigzag" trajectories resembling transverse oscillatory motions along the CS, and have at least one oscillatory pattern in their instantaneous radial speeds. Their oscillation periods are ranging from 30 to 91 s and their speed amplitudes from 128 to 902 km s-1. Among 19 blobs, 10 blobs have experienced at least two cycles of radial speed oscillations with different speed amplitudes and periods, while 9 blobs undergo one oscillation cycle. To examine whether or not the apparent speed oscillations can be explained by vortex shedding, we estimate the quantitative parameter of vortex shedding, the Strouhal number, by using the observed lateral widths, linear speeds, and oscillation periods of the blobs. We then compare our estimates with theoretical and experimental results from MHD simulations and fluid dynamic experiments. We find that the observed Strouhal numbers range from 0.2 to 2.1, consistent with those (0.15-3.0) from fluid dynamic experiments of bluff spheres, while they are higher than those (0.15-0.25) from MHD simulations of cylindrical shapes. We thus find that blobs formed in a post-CME CS undergo kinematic oscillations caused by fluid dynamic vortex shedding. The vortex shedding is driven by the interaction of the outward-moving blob having a bluff spherical shape with the background plasma in the post-CME CS.

• 대한한방내과학회지
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• 제39권1호
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• pp.22-43
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• 2018

Objective: The purpose of this study is to investigate the effect of Cheonmagudeung-eum (CGE) for essential hypertension by systematic review and meta-analysis. Methods: The period of literature search was until October 30, 2016, and 14 electronic databases were utilized as search engines. The evaluation for the risk of bias (RoB) was conducted by using the Cochrane Risk of Bias Tool. The meta-analysis was performed by synthesizing outcome data, including total effective rate (TER), systolic blood pressure (SBP), diastolic blood pressure (DBP), and the incidence of adverse events. Result: There were a total of 64 RCTs using CGE on adult essential hypertension. In the RoB evaluation, most of the items were unclear, and the qualities of studies were rated low. The concurrent treatment of CGE and antihypertensive drug (AHD) showed a significant hypotensive effect since the risk ratio (RR) of TER was 1.17 times (95% CI 1.14, 1.20, p<0.01) higher than that of AHD alone. In addition, the mean difference (MD) appeared low as 8.73 mm/Hg in SBP (95% CI -11.36, -6.09, p<0.01) and 5.81 mm/Hg in DBP (95% CI -7.50, -4.12, p<0.01). Conclusion: Through this study, it was identified that the combined treatment of CGE and AHD on hypertension would be more effective than that of AHD treatment alone. However, due to the low quality of the selected original articles, the significance of this conclusion is somewhat limited, and we hope that this would be complemented through more rigorous RCTs in the future.

• 대한한방내과학회지
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• 제35권1호
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• pp.12-23
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• 2014

Objectives : The purpose of this study was to report possibility of acupuncture or moxibustion for the treatment of Parkinson's disease (PD) by reviewing literature about its effectiveness. Methods : In this review, PubMed, SCOPUS, Science Direct and CINAHL of EBSCOhost were used to search medical journals, using keywords "Parkinson's disease and acupuncture" and "Parkinson's disease and moxibustion". The search range included randomized controlled trials (RCT) about Parkinson's disease combined with another disease and other treatments with acupuncture or moxibustion. Non-randomized controlled trial (nRCT), case study, animal experiment, human experiment, review, survey, essay, letter, and protocol for review were excluded. Results : From 311 studies, 111 were selected during the title and the screening. Finally, 16 RCTs (15 for acupuncture research and one for moxibustion) were included in this review, after scanning and matching the inclusion and exclusion criteria. The number of patients varied between 5 and 88. A total of 12 studies using electroacupuncture (EA) were classified into acupuncture studies. The body acupuncture studies numbered 4, scalp acupuncture 4, body and scarp acupuncture mixed studies 4, and bee venom, ear and abdomen acupuncture were each one study. In evaluation methods, total effective rate method was used in 9 studies, the Unified Parkinson's Disease Rating Scale (UPDRS) was used in 8, and the Webster score in 2. In addition, the Berg balance scale (BBS), 30 m walking time, steps to walk 30 m, PD motor function score, and Motor Performance Series by Schoppe (MLS) method were used for evaluation. In 15 of the 16 studies, the verum acupuncture group showed significant improvement compared with the control. In 9 studies using total effective rate method, the effective rate was reported as 80.0-97.3% in verum acupuncture groups and 52.6-86.4% in controls. Conclusions : Acupuncture may be a plausible alternative method to care for the long term symptoms and treat movement impairment of Parkinson's disease. However, to confirm this result, high quality studies including randomized, placebo-controlled double-blind trials are warranted.

• 한국육종학회지
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• 제41권4호
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• pp.574-578
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• 2009

"고풍적축면"은 "안동적축면"과 "뚝섬적축면"을 교배하여 육성한 적축면 잎상추 품종이다. 기존의 같은 type의 품종보다 추대가 늦은 중만생 품종이며, 적색발현이 좋아, 안토시안닌 함량이 29.4 mg/100 g으로 "뚝섬적축면"보다 10배이상 많았으며 수확후 $4^{\circ}C$에서 3주간 이상 저장이 가능하였다. 재배 적기는 연중재배가 가능하나 시험재배결과 평난지에서는 봄, 가을에 고랭지에서는 봄, 여름, 가을에 노지 및 비가림하우스 재배가 가능한 품종이다. 수확 가능한 엽수는 52매이며, 주중은 330 g으로 상품수량성은 19.5 ton/ha로 뚝섬적축면 보다 17% 증수되었다.

• 한국육종학회지
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• 제41권4호
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• pp.579-582
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• 2009

"미홍"은 "단홍적축면"과 "뚝섬적축면"을 교배하여 육성한 추대가 늦고, 엽색이 매우진한 적축면 잎상추 품종이다. 기존 같은 type의 품종보다 추대가 늦은 중만생 품종이며, 적색발현이 좋아, 안토시안닌 함량이 28.9 mg/100 g으로 "뚝섬적축면"보다 10배이상 많았으며 수확 후 $4^{\circ}C$에서 3주간 이상 저장이 가능하였다. 재배적기는 연중재배가 가능하나 시험재배 결과 평난지에서는 봄, 가을에 고랭지에서는 여름재배가 가능하며, 노지 및 비가림하우스 등 어느 곳에서나 재배가 가능한 품종이다. 수확 가능한 엽수는 주당 54매이며, 주중은 291 g으로 상품수량성은 17.0 ton/ha로 "뚝섬적축면"보다 2% 증수되었다.

• 천문학회지
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• 제56권2호
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• pp.263-275
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• 2023

The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

• 대한한방부인과학회지
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• 제26권2호
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• pp.138-150
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• 2013

Objectives: To observe randomized controlled trials(RCTs) related to investigating the effects of acupoint treatments on nausea and vomiting in pregnancy to establish the basis of korean medical treatments, and suggest the problems of future clinical research. Methods: After searching for national and international papers published after 2000 and restricting the parameters to 'clinical trial', 'controlled clinical trial', 'randomized controlled trial', then comparing the subjects, methods, research tools, and results to understand the effects and re-comparing the conflicting results to assume the cause. Results: Of the 9 research papers that applied acupressure, four of them used control and experimental groups, and three(75%) research papers indicated significant reduction in vomiting and nausea, and of the seven research papers that utilized the experimental and placebo groups, five(71.4%) reported significant reducing effects. Of the four research papers the used acupuncture treatments, four research papers using control and placebo groups, two showed improvements in symptoms but did not have significant results compared to sham acupuncture groups, and two showed significant reduction of symptoms compared to the control groups. The one research paper that used electrical stimulation showed significant results in the reduction of vomiting and nausea compared to the control group. Conclusions: Acupressure and electrical stimulation showed efficacy reducing the symptoms. Acupuncture treatments did not indicate efficacy some experiments. Therefore it is thought that future acupuncture treatments should use methods that resemble actual clinical medicine to establish efficacy to produce significant results.

• 대한한방부인과학회지
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• 제26권3호
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• pp.73-84
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• 2013

Objectives: This study aims to identify associated factors in female infertility treatment using herbal medicine, acupuncture and moxibustion. Methods: Acupuncture and moxibustion treatments were performed with intake of herbal medicines (Jokyungjongoktanggagam-bang, Sutaehwangagam-bang) for six menstrual cycles in 32 subfertile women. The variables selected for initial analysis were age, duration and type of infertility, frequency of previous In Vitro Fertilization (IVF) and live births, weekly frequency of sexual intercourse, number of treatment cycles, endometrial thickness on MCD15 and hormonal parameter (anti-mullerian hormone, follicle-stimulating hormone, luteinizing hormone, estrone). Results: Six patients became pregnant (18.75%) and seven patients withdrew. Factors influenced pregnancy were age (${\leq}35$ years), a shorter duration of infertility (<6 years), frequency of IVF (${\leq}3$), anti-mullerian hormone level (>1 ng/ml), and number of treatment cycles(${\leq}3$ cycles). Conclusions: Korean medicine is a useful and optimized treatment option for women with younger age, fewer previous IVF cycles, shorter infertile duration and normal anti-mullerian hormone level at first 3 cycles of treatment.

• Korean Journal of Acupuncture
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• 제28권3호
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• pp.1-12
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• 2011

Objectives : The purpose of this study is to review laser acupuncture studies to find possibility for applying high intensity laser to acupuncture and moxibustion treatment. Methods : Searching papers was performed using search engines of five electronic databases, including Pubmed, Thomson ISI, EMBASE, Sciencedirect, and EBSCO, from inception to May 2011 without language limitation. Inclusion criteria were clinical studies with human, randomized controlled trials (RCTs), case-control studies, and case reports. Selecting papers was performed with titles and abstracts in first step, scrutinize full text in second step, and then the extrated data was analyzed by two authors independently. The methodological quality for RCTs was evaluated using Jadad's scale. Results : Total 8 papers, (3 RCTs, 5 controlld studies, and 1 case reports), were finally selected. The study dealt with surgical laser, argon and $CO_2$ laser was one for each, with GaAs laser was two, and with new semiconductor laser, GaN, were four. The output range was from 110 mW to 15 W. The study diseases were alcohol addiction, knee osteoarthritis, bronchopneumonia and asthma for children, and circulation. All studies reported positive effect. The methodological quality in all RCTs was low because of below 3 points and all studies had few subject numbers. Conclusions : We suggest that high intensity laser can be applied to acupuncture and moxibustion. Further rigorous and well-designed study will be needed for various disease. The oriental medical society needs to take active measures to study and clinical application of acupuncture and moxibustion treatment with high intensity laser.