• Journal of Korea Water Resources Association
• /
• v.39 no.8 s.169
• /
• pp.691-702
• /
• 2006

This study introduced a method to evaluate the probability of a specific area to be affected by a drought of a given severity and shows Its potential for investigating agricultural drought characteristics. The method was applied to South Korea as a case study. The proposed procedure included Standardized Precipitation Index(SPI) time series, which were linearly transformed by the Empirical Orthogonal Functions(EOF) method. These EOFs were extended temporally with AutoRegressive Moving Average(ARMA) method and spatially with Kriging method. By performing these simulations, long time series of SPI can be simulated for each designed grid cell in whole area. The probability distribution functions of the area covered by a drought and the drought severity are then derived and combined to produce drought severity-area-frequency(SAF) curves.

• Korean Journal of Radiology
• /
• v.21 no.8
• /
• pp.998-1006
• /
• 2020

Objective: To compare the accuracies of quantitative computed tomography (CT) parameters and semiquantitative visual score in evaluating clinical classification of severity of coronavirus disease (COVID-19). Materials and Methods: We retrospectively enrolled 187 patients with COVID-19 treated at Tongji Hospital of Tongji Medical College from February 15, 2020, to February 29, 2020. Demographic data, imaging characteristics, and clinical data were collected, and based on the clinical classification of severity, patients were divided into groups 1 (mild) and 2 (severe/critical). A semiquantitative visual score was used to estimate the lesion extent. A three-dimensional slicer was used to precisely quantify the volume and CT value of the lung and lesions. Correlation coefficients of the quantitative CT parameters, semiquantitative visual score, and clinical classification were calculated using Spearman's correlation. A receiver operating characteristic curve was used to compare the accuracies of quantitative and semi-quantitative methods. Results: There were 59 patients in group 1 and 128 patients in group 2. The mean age and sex distribution of the two groups were not significantly different. The lesions were primarily located in the subpleural area. Compared to group 1, group 2 had larger values for all volume-dependent parameters (p < 0.001). The percentage of lesions had the strongest correlation with disease severity with a correlation coefficient of 0.495. In comparison, the correlation coefficient of semiquantitative score was 0.349. To classify the severity of COVID-19, area under the curve of the percentage of lesions was the highest (0.807; 95% confidence interval, 0.744-0.861: p < 0.001) and that of the quantitative CT parameters was significantly higher than that of the semiquantitative visual score (p = 0.001). Conclusion: The classification accuracy of quantitative CT parameters was significantly superior to that of semiquantitative visual score in terms of evaluating the severity of COVID-19.

• Korean Journal of Plant Resources
• /
• v.35 no.2
• /
• pp.169-182
• /
• 2022

This study was conducted to predict the distribution of rare·endemic plants (Sophora koreensis Nakai) in the border forests where wildfire damage occurred and to quantify the damage. For this purpose, we tried to derive more accurate results through forest area damage (NBR) according to the Burn severity of wildfires, damage by tree species type (Vegetation map), and MaxEnt model. For Burn severity analysis, satellite imagery (Landsat-8) was used to analyze Burn severity (ΔNBR2016-2015) and to derive the extent of damage. To prepare the Vegetation map, the land cover map prepared by the Ministry of Environment, the Vegetation map prepared by the Korea Forest Service, and the vegetation survey conducted by itself were conducted to prepare the clinical map before and after the forest fire. Lastly, for MaxEnt model analysis, the AUC value was derived by using the habitat coordinates of Sophora koreensis Nakai based on the related literature and self-report data. As a result of combining the Maxent model analysis data with the Burn severity data, it was confirmed that 45.9% of the 44,760 m² of habitat (predicted) area of Sophora koreensis Nakai in the wildfire damaged area or 20,552 m², was damaged.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.40 no.1
• /
• pp.25-33
• /
• 2020

A drought event is characterized by duration, severity and affected area. In general, after calculating a drought index using hydro-meteorological time series at a station, a drought event is defined based on the run theory to identify the beginning and end time. However, this one-dimensional analysis has limitations for analyzing the spatio-temporal occurrence characteristics and movement paths of drought. Therefore, this study is to define a three-dimensional drought event using a simple clustering algorithm and to develop a drought map that can be used to understand the drought severity according to the spatio-temporal expansion of drought. As a result, compared with the two-dimensional monitoring information to show spatial distribution of drought index, a proposed drought map is able to show three-dimensional drought characteristics inclusing drought duration, spatial cumulative severity, and centroid of drought. The analysis of drought map indicated that there was a drought event which had the affected area less than 10 % while on occations while there were 11 drought events (44 %) which had the affected area more a than 90 % of the total area. This means that it is important to understand the relationship between spatial variation of drought affected area and severity corresponding to various drought durations. The development of drought map based on three-dimensional drought analysis is useful to analyze the spatio-temporal occurrence characteristics and propagation patterns of regional drought which can be utilized in developing mitigation measures for future extreme droughts.

• Herbal Formula Science
• /
• v.24 no.1
• /
• pp.53-61
• /
• 2016

Objective The object of this case report is to evaluate the possibility of utilizing Osuyu-tang as a new therapy of psoriasis.Method Diagnosis and Psoriasis' progress was evaluated based on the patient's chart and picture. Diagnosis based on Sanghanlun was organized by graph. The severity of psoriasis' progress was evaluated by Psoriasis Area Severity Index(PASI) and visually analyzed through picture.Results On PASI and picture, we could confirm psoriasis’s area was decreased from hairline to middle of forehead and redness, thickness, scale of psoriasis also got better.Conclusion Osuyu-tang is efficient to patient of this case report as a treatment.

• Proceedings of the KSRS Conference
• /
• 2002.10a
• /
• pp.274-274
• /
• 2002

Damage to forest trees, caused by wildfire, changes their spectral reflectance signature. This factor led to the initiation of a research project at the Remote Sensing & GIS Laboratory, Kookmin University, to determine if multispectral data acquired by IKONOS could provide fire scar and bum severity mapping. This paper will present detail mapping of burned areas in the eastern coast of Korea with IKONOS imagery. In addition, a single post-burn Landsat-7 ETM＋ data was used to compare with IKONOS, the study area. Burn severity map based on IKONOS image was found to be affected by strong topographic illumination effects in the mountain forest. But it has better the delineation of the bum-scarred area. In this study the NDVI was analyzed for geometric illumination conditions influenced by topography(slop, aspect and elevation) and shadow(solar elevation and azimuth angle).

• The Journal of Korean Obstetrics and Gynecology
• /
• v.20 no.1
• /
• pp.161-168
• /
• 2007

Purpose : The purpose of this study is to identify the difference of clinical effects of gyejibongnyeong-hwan and acupuncture therapy on primary dysmenorrhea. Methods : We studied with ten patients recruited from April, 2003 to Feburary, 2004. Women with organic disease as uterine myoma, ovarian cysts and pelvic inflammatory disease were excluded from this study. We treated them with gyejibongnyeong-hwan or gyejibongnyeong-hwan combined acupuncture therapy for 8weeks. The severity of dysmenorrhea was measured by VAS(Visual Analog Scale). Results : gyejibongnyeong-hwan significantly decreased the severity of dysmenorrhea. And Gyejibongnyeong-hwan combined Acupuncture therapy significantly decreased the severity of dysmenorrhea. The change of VAS of gyejibongnyeong-hwan group is significantly higher than gyejibongnyeong-hwan combined acupuncture. Both of Gyejibongnyeong-hwan and acupuncture did not show hepatic and renal virulence. Conclusion : This study shows that gyejibongnyeong-hwan has remarkable effects on dysmenorrhea patients. Obviously further researches concerning all these area still necessary.

• Proceedings of the KSRS Conference
• /
• 2004.10a
• /
• pp.537-540
• /
• 2004

Space-borne multi-sensor data could provide fire scar and bum severity mapping. This paper will present detail mapping of burnt areas in Cheongyange Yesan of Korea with ETM+ image. Burn severity map based on ETM+ image was found to be affected by strong topographic illumination effects in mountainous forest area. Topographic effect is a factor which causes errors in classification of high spatial resolution image like IKONOS image. Minnaert constants J( in each band of ETM+ image is derived for reduction of mountainous terrain effects. Finally, this paper computes quantitative analysis of forest fire damage by each forest types.

• The korean journal of orthodontics
• /
• v.23 no.1 s.40
• /
• pp.17-35
• /
• 1993

We tried to evaluate frequencies and severities of malocclusion of various socioeconomic areas according to growth and development. To obtain objective validity, we used Handicapping Labiolingual Deviation (HLD) suggested by Draker, Treatment Priority Index (TPI) by Grainger, Handicapped Malocclusion Assessing Record (HMAR) by American Dental Association and American Association of Orthodontist. Seoul and Kwangju were selected as an urban group, Ahnyang as an middle socioeconomic group and Hwasun near the Kwangju area as an rural group. 140 (male 63, female 73) of 5th grade in 'E' elementary school students in Seoul, 202 (male 101, female 101) of 'S' elementary school students in Kwangju, 207(male 105, female 102) of 'H' elementary school students in Hwasun, and 100(male 49, female 51) of 'M' elementary school students of in Ahnyang of all the same grade were analyzed and we obtained the results as follows; 1. TPI, HLD, and HMAR showed high coincidence and reproducibility between different observer. (p<0.01) 2. In comparison of TPI, HLD, and HMAR according to clinical decision, there was statistically difference between each other. (p<0.01) 3. As the severity of malocclusion increases there was high correlation between TPI and HLD, and between HLD and HMAR (p<0.05) 4. With respect to differences between areas in TPI and HLD, there was statistically difference between Ahnyang and other areas. 5. In Seoul as an urban group there was a high incidence of periodic checkup and history of orthodontic treatment than other area. 6. Mode of feeding and posture during sleeping did not affect the severity of malocclusion. As a conclusion, TPI, HLD and HMAR are so reproducible and coincident that they can be used as a guide on evaluating the frequency and severity of malocclusion and determining the priority of orthodontic treatment to determine the need and supply of orthodontic treatment. Furthermore these indices can provide objectively valid data for establishing public health problem solution.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.14 no.2
• /
• pp.278-285
• /
• 2001

A Reports were done on proriasis which were treated bv medications of Sasang Constitution and Constitution-Acupunture in Dept. surgery, opthalmology & otolaryngology, college of Oriental Medicine, Kyungsan University, Pohang, Korea, from May 30. 2000 to JUN 30 2001. we gave score and checked involvement, plaque, erythematous popules, invasiveness according to psoriasis area and severity index. The results were as follows: 1. Sasang Constitution classification was Soyanggin 11($93.33\%$), Taeumgin 1($6.67\%$) in the 15 cases, Hyungbangsabaeksan is used in 9 cases($60\%$), Yanggeuksanhoatang is used in 3cases($13.11\%$), Geopungchunggisan is used in 3 cases($20\%$), Hyungbangdojucksan is used in 1 case($6.57\%$) 2. In the 9 cases, we checked for over 4 weeks, clinical severity of involvement, plaque, total score(psoriasis area and severity index) was siginificantly decreased(p <0.05), clinical severity of erythematous popules, itching was decreased but It is not siginificant(p>0.05). 3. The mean duration of treatmemt was 73.3 days, result of Excellent or Good improvement was showed on over 120 days. These results indicate that Sasang Constitution and Constitution-Acupuncture treatment is effective on psoriasis and the more study is needed.