• 대기
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• 제28권3호
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• pp.317-324
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• 2018

In this study, we review the ground-based whole-sky camera (WSC), which is developed to continuously capture day and night cloud images using the illumination data from a precision Lightmeter with a high temporal resolution. The WSC is combined with a precision Lightmeter developed in IYA (International Year of Astronomy) for analysis of an artificial light pollution at night and a DSLR camera equipped with a fish-eye lens widely applied in observational astronomy. The WSC is designed to adjust the shutter speed and ISO of the equipped camera according to illumination data in order to stably capture cloud images. And Raspberry Pi is applied to control automatically the related process of taking cloud and sky images every minute under various conditions depending on illumination data from Lightmeter for 24 hours. In addition, it is utilized to post-process and store the cloud images and to upload the data to web page in real time. Finally, we check the technical possibility of the method to observe the cloud distribution (cover, type, height) quantitatively and objectively by the optical system, through analysis of the captured cloud images from the developed device.

• 천문학회보
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• 제36권2호
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• pp.52.2-52.2
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• 2011

We searched and studied galaxy overdensities at 0.6 < z < 4.5 in the areas of two GOODS fields. These overdensities are identified by running top-hat filters on the two dimensional spatial distribution of two galaxy samples - a K-band limited, photometric redshift sample at 0.6 < z < 4.5, and BVz-color selected sample targeting overdensities at z ~ 3.7 and z ~ 4.0. Here photometric redshifts are derived from multi-wavelength data ranging from U-band through 8 micron band of the Spitzer. We find 52 overdensities with significances of 3.5-7 ${\sigma}$. The derived masses found to be a > $10^{13}\;M_{\odot}$ with the comoving number density of a few ${\times}10^{-6}\;Mpc^{-3}$ at z ~ 3. In order to understand the high number density of massive overdensities at high redshift, we carried out an analysis of galaxy overdensities using the mock galaxy catalog based on Millennium simulation selected in the same way as the analysis of the observational data. In the simulation, we find 650 galaxy overdensities with a 3.5 ${\sigma}$ detection threshold over $2^{{\circ}2}$ sky field. The number density of the very massive overdensities (M > $10^{14}\;M_{\odot}$) in simulation shows a similar trend with the observation. We further discuss implications of our results.

• 대한한의학회지
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• 제36권2호
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• pp.1-7
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• 2015

Objectives: To report on the result of infertility treatment with Korean medicine in clinical settings. Methods: This study was single arm, retrospective observational study. Analysis of the medical records on thirty four infertile women who were treated by acupuncture, moxibustion, herbal medicine(Jokyungjongoktang-gagambang, Sutaehwan-gagambang). Pregnancy rate(PR) and Live birth rate(LBR) were analyzed as the primary outcomes. Changes of AMH, FSH, LH, $E_2$, $P_4$, endometrial thickness, fat mass, and BMI were also analyzed as the secondary outcomes. Results: A total of 34 patients were treated in the traditional Korean medical clinic. Nine patients were dropped, and 25 subjects completed the final examination at the end of this treatment schedule. Five of 25 subjects conceived during treatment, reaching 20% PR and LBR was also 20%. Except for FSH level, the results of the remaining outcome measures, including LFT, showed no significant changes. No serious adverse event has been reported. Conclusion: Although no significant changes in bio-markers were observed, complex treatment using Korean medicine has shown effectiveness on women's infertility. In addition, the safety of the treatment has been verified.

• 한국지구과학회:학술대회논문집
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• 한국지구과학회 2005년도 춘계학술발표회 논문집
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• pp.182-187
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• 2005

호남지방의 집중호우 예측 가능성을 향상시키기 위하여 레이더 자료동화를 이용한 예측가능성 제고, 광주지방의 고층자료를 분석하여 집중호우 발생시의 종관장을 해석하였다. 자료동화 자료로는 진도 S-band 레이더 원시자료를 이용한 고도별 수평 바람장을 산출하여 사용하였다. 또한, PC-cluster를 platform으로 사용하는 호남지방의 고해상도 기상예측시스템을 이용하여, 레이더 수평 바람장 자료의 동화가 집중호우 및 중규모 순환장 예측정확도에 미치는 영향을 살펴보았다.

• 한국치위생학회지
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• 제5권2호
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• pp.185-199
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• 2005

The purpose of this research is to suggest a new desirable direction to a positive educational program for dental hygeine students, through the analysis of the degrees of observation and performance practice and the student satisfaction. This researched 471 senior dental hygien students from 5 separate universities. SPSS 10.0 for Windows was used to transform the results data analysis into statistics. The students' degree of satisfaction and length of observational/performance practice level were measured. For statistical anlysis the Mean and Standard Deviation were computed and the t-test and ANNOVA were carried out. The significant level of these statistics was a=0.05. 1. 12 weeks practice is the highest in the satisfaction of observation practice was the highest in clinical settings, followed by 16 weeks practice, and 8 weeks practice. 2. 12 weeks practice is the highest in the satisfaction of performance practice, followed by 16 weeks practice, and 8 weeks practice. 3. 8 weeks practice is the highest in the satisfaction of performance practice, followed by 12 weeks practice, and 16 weeks practice. 4. According to the frequency of clinical practice and satisfaction 12 week program of observation/performance practice is the most desirable, followed by 16 weeks practice, and 8 weeks practice.

• Earthquakes and Structures
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• 제17권4호
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• pp.365-372
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• 2019

Post-earthquake crisis management is a key capability for a country to be able to recover after a major seismic event. Instrumental seismic data transmitted and processed in a very short time can contribute to better management of the emergency and can give insights on the earthquake's impact on a specific area. Romania is a country with a high seismic hazard, mostly due to the Vrancea intermediate-depth earthquakes. The elastic acceleration response spectrum of a seismic motion provides important information on the level of maximum acceleration the buildings were subjected to. Based on new data analysis and knowledge advancements, the acceleration elastic response spectrum for horizontal ground components recommended by the Romanian seismic codes has been evolving over the last six decades. This study aims to propose a framework for post-earthquake warning based on code spectrum exceedances. A comprehensive background analysis was undertaken using strong motion data from previous earthquakes corroborated with observational damage, to prove the method's applicability. Moreover, a case-study for two densely populated Romanian cities (Focsani and Bucharest) is presented, using data from a $5.5M_W$ earthquake (October 28, 2018) and considering the evolution of the three generations of code-based spectral levels for the two cities. Data recorded in free-field and in buildings were analyzed and has confirmed that no structural damage occurred within the two cities. For future strong seismic events, this tool can provide useful information on the effect of the earthquake on structures in the most exposed areas.

• 대기
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• 제31권4호
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• pp.405-420
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• 2021

Forest fire happens every year at Yeongdong, Gangwon-do, due to the strong local wind during the spring time and it causes a huge damage. This wind is named "Yangganjipung" or "Yanggangjipung" that blows along Yeongdong. However, the occurrence conditions of the wind have been still unclear. To identify the occurrence mechanism of local strong wind through three-dimensional observation data, Gangwon Regional Meteorological Administration performed Joint Gangwon-Yeongdong 3D Observation Project in 2020. The special observation was carried out for 6 times from March to April. The observation data was analyzed by focusing on the structure of synoptic pressure distribution and inversion layer. The result showed that the strength of wind is different depending on the latitude of low pressure, intensity of inversion layer, and changes on height in the south-high and north-low pressure distribution. As the interval of the upper and lower parts of the inversion layer was narrow, the strength of the wind became stronger, which is one of the observational characteristics of the springtime wind pattern at Yeongdong, Gangwon-do. In future, the clear mechanism of the local wind in the Yeongdong during the spring time is expected to be verified based on the accumulative observation data and close analysis.

• 한국컴퓨터정보학회논문지
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• 제23권11호
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• pp.51-57
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• 2018

In this paper, we studied about the extraction of the parameter and implementation of speechreading system to recognize the Korean 8 vowel. Face features are detected by amplifying, reducing the image value and making a comparison between the image value which is represented for various value in various color space. The eyes position, the nose position, the inner boundary of lip, the outer boundary of upper lip and the outer line of the tooth is found to the feature and using the analysis the area of inner lip, the hight and width of inner lip, the outer line length of the tooth rate about a inner mouth area and the distance between the nose and outer boundary of upper lip are used for the parameter. 2400 data are gathered and analyzed. Based on this analysis, the neural net is constructed and the recognition experiments are performed. In the experiment, 5 normal persons were sampled. The observational error between samples was corrected using normalization method. The experiment show very encouraging result about the usefulness of the parameter.

• 동의생리병리학회지
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• 제33권4호
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• pp.219-225
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• 2019

The objective of this study is to observe the effectiveness of complex Korean Medicine treatments on pain reduction of patients after meniscal surgery. We analyzed 16 patients who have been diagnosed as Meniscal injury on Magnetic Resonance Imaging(MRI) scan and had admitted to Dunsan Korean Medical hospital from January 30, 2014 to April 30, 2019. The analysis was conducted as retrospective study which analyzes patient's medical records. Statistical analysis was performed using the IBM SPSS statistics 25 program. We used Numeric Rating Scale to evaluate pain reduction, Five-point likert scale to asses treatment satisfaction. The result showed that there were statistically significant pain reduction on the postoperative meniscal injury patients treated with complex Korean Medicine treatments. In conclusion, we found that the complex Korean Medicine treatments showed a positive effect on pain reduction of postoperative meniscal injury patients. Further research is required to confirm the effectiveness of Korean Medicine treatment.

• The Korean Journal of Pain
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• 제34권3호
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• pp.346-368
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• 2021

Background: Recalcitrant disc herniation may result in chronic lumbar radiculopathy or sciatica. Fluoroscopically directed epidural injections and other conservative modalities may provide inadequate improvement in some patients. In these cases, percutaneous neurolysis with targeted delivery of medications is often the next step in pain management. Methods: An evidence-based system of methodologic assessment, namely, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) was used. Multiple databases were searched from 1966 to January 2021. Principles of the best evidence synthesis were incorporated into qualitative evidence synthesis. The primary outcome measure was the proportion of patients with significant pain relief and functional improvement (≥ 50%). Duration of relief was categorized as short-term (< 6 months) and long-term (≥ 6 months). Results: This assessment identified one high-quality randomized controlled trial (RCT) and 5 moderate-quality non-randomized studies with an application of percutaneous neurolysis in disc herniation. Overall, the results were positive, with level II evidence. Conclusions: Based on the present systematic review, with one RCT and 5 non-randomized studies, the evidence level is II for percutaneous neurolysis in managing lumbar disc herniation.