• Atmosphere
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• v.31 no.2
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• pp.157-170
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• 2021

To investigate the effect of snowfall on the traffic of general roads in Gangwon-do, case analysis was performed in Gangneung, Pyeongchang, and Chuncheon using ASOS (Automated Synoptic Observing System) snowfall data and VDS (Vehicle Detector System) traffic data. First, we analyzed how much the traffic volume and speed decrease in snowfall cases on regional roads compared to non-snow cases, and the characteristics of monthly reduction due to snowfall were investigated. In addition, Pearson correlation analysis and regression analysis were performed to quantitatively grasp the effect of snowfall on traffic volume and speed, and sensitivity tests for snowfall intensity and cumulative snowfall were performed. The results showed that the amount of snowfall caused decrease both in the traffic volume and speed from usual (non-snowfall) condition. However, the trend was different by region: The decrease rate in traffic volume was in the order of Gangneung (17~22%), Chuncheon (14~17%), and Pyeongchang (11~14%). The decrease rate in traffic speed was in the order of Chuncheon (9~10%), Gangneung (8~9%), Pyeongchang (5~6%). No significant results were found in the monthly decrease rate analysis. In all regions, traffic volume and speed showed a negative correlation with snowfall. It was confirmed that the greater the amount of traffic entering the road, the greater the slope of the trend line indicating the change in snowfall due to the traffic volume. As a result of the sensitivity test for snowfall intensity and cumulative snowfall, the snowfall information at intervals of 6-hours was the most significant.

• The Journal of the Korea Contents Association
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• v.22 no.3
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• pp.560-566
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• 2022

The purpose of this study was to examine the relationship of the changes between leisure and social activities, life satisfaction, and happiness of the disabled according to the time before and after COVID-19, and to examine the moderating effect of living alone. For the analysis, the data of 3,773 persons from the employment panel for the disabled were used for the analysis, and as a result of the analysis, it was confirmed that the decrease in leisure and social activities further reinforced the decrease in life satisfaction, and consequently the decrease in happiness also increased. In addition, it was found that the effect of leisure social activities on life satisfaction increases according to living alone. In other words, the decrease in leisure and social activities of the disabled led to a decrease in life satisfaction and decreased happiness. Through these results, although social distancing is important, support such as online gatherings, participation in cultural and artistic activities, and education is necessary as an intervention in reducing leisure and social activities, which can be an important protective factor in the lives of the disabled. Furthermore, it was suggested that screening for mental health and intervention for persons with disabilities living alone are necessary in case management of persons with disabilities.

• Journal of Medicine and Life Science
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• v.19 no.3
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• pp.103-108
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• 2022

In 2021,the incidence of newly notified tuberculosis in Jeju Province decreased by 23.0% compared to that in the previous year. This was the largest decline among the 18 municipalities studied. This study aimed to examine trends in the incidence of tuberculosis among different age and sex groups in Jeju Province between 2017 and 2021. This study observed the number of new cases in the annual report from 2017 to 2021, published by the Jeju Center for Infectious Diseases Control and Prevention. The average annual percentage change (AAPC; %) was calculated to determine the trend in crude incidence rates over the past 5 years by sex and age. While a P-value of <0.1 was considered marginally significant, aP-value of <0.05 was considered statistically significant. The AAPC of all age groups in Jeju Province had negative values. In men,there was a statistically significant decrease in ages 30-34, 40-44, 45-49, and 50-54 years and a marginally significant decrease in ages 35-59, 55-59, 60-64, 65-69, 75-79, and ≥80 years. In women, a statistically significant decrease was observed among patients aged 30-34, 35-39, and ≥80 years, and a marginally significant decrease was observed among patients aged 45-49, 50-54, 60-64, 65-69, and 75-79 years. A statistically significant decrease in tuberculosis was observed among patients in their 30s and 40s, and elderly patients aged ≥80 years comprised the group vulnerable to tuberculosis. Based on these findings, tuberculosis prevention and screening programs conducted in Jeju Province were effective.

• Journal of Sasang Constitutional Medicine
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• v.17 no.3
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• pp.163-171
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• 2005

1. Objectives The purpose of this study is to evaluate the effectivity of the Korean herbal medicine therapy which is based on the Sasang constitutional medicine for the Soyangin Edema Patient 2. Methods Patient who diagnosed as Soyangin by physical characteristic, posture and symptoms is evaluated with length of patient' Lt. calf, ankle, foot circumference after medication 3. Results After medicine, 1) Length of patient' Lt. calf was on the decrease from 37.2cm to 34.4cm 2) Length of patient' Lt. ankle was on the decrease from 27.8cm to 25.4cm 3) Length of patient' Lt. foot was on the decrease from 28.0cm to 25.7cm Edema of a Soyangin patient responded well to the treatment with Dojeokgangki-tang 4. Conclusions The case study shows an efficient results by using Dojeokgangki-tang in treatment of Soyangin edema patient.

• Asian-Australasian Journal of Animal Sciences
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• v.6 no.3
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• pp.373-375
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• 1993

Quantitative ${\beta}$-galactosidase estimation in the intestinal mucosal cells of calves with diarrhea under experimental conditions due to rotavirus were undertaken. A quantitative decrease of 40-70% in ${\beta}$-galactosidase activity was observed in proximal and middle segments of the small intestine of the infected calves, more so in the middle segments. The decrease in the distal part of the intestine, however, was lesser (5 to 30%). The decrease in the activity was more marked on the day 2 to 6 post infection indicating the degree of the damage of the villi of the small intestine.

• Advances in Energy Research
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• v.2 no.2
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• pp.73-84
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• 2014

Fuel cells of proton exchange membrane type (PEMFC) working with hydrogen in the anode and ambient air in the cathode ('air breathing') have been prepared and characterized. The cells have been studied with variable thickness of the cathode catalyst layer ($L_{CL}$), maintaining constant the platinum and ionomer loads. Polarization curves and electrochemical active area measurements have been carried out. The polarization curves are analyzed in terms of a model for a flooded passive air breathing cathode. The analysis shows that $L_{CL}$ affects to electrochemical kinetics and mass transport processes inside the electrode, as reflected by two parameters of the polarization curves: the Tafel slope and the internal resistance. The observed decrease in Tafel slope with decreasing $L_{CL}$ shows improvements in the oxygen reduction kinetics which we attribute to changes in the catalyst layer structure. A decrease in the internal resistance with $L_{CL}$ is attributed to lower protonic resistance of thinner catalyst layers, although the observed decrease is lower than expected probably because the electronic conduction starts to be hindered by more hydrophilic character and thicker ionomer film.

• Journal of Industrial Technology
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• v.28 no.A
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• pp.23-26
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• 2008

Ozone/GAC and ozone-GAC processes were introduced for treatment of humic acid, which is representative refractory organic compound. The treatment efficiencies of humic acid in each process were analyzed in pH variation, DOC removal, and $UV_{254}$ decrease. $UV_{254}$ decrease in all processes was comparatively high with efficiency over 92%. $UV_{254}$ decrease in ozone alone process was 85%. DOC removal in Ozone-GAC process was the highest with 75%. Removal by Ozone/GAC, Ozone alone processes were 71% and 33% respectively.

• 한국생물공학회:학술대회논문집
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• 2005.04a
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• pp.360-363
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• 2005

This study was a method that used a hydrolysis for increasing the efficacy of alcohol decrease from Hovenia dulcis extract. The best pH was 2.0 to obtain a maximum activity at fixed reaction temperature and time. At pH 2.0, reaction temperature $80^{\circ}C$ and reaction time 4 hr gave the highest activity which was 124.2% of control. This is very simple and efficient method to increase the efficacy of alcohol decrease from Hovenia dulcis extract. The mechanism that increases the efficiency of alcohol decrease be examined through hydrolysis.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.2 s.173
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• pp.378-385
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• 2000

Fracture resistance (J-R) curves, which are used for elastic-plastic fracture mechanics analyses, decreased under tension-compression loading condition. This phenomenon was proved by several former researches, but the causes have not been clear yet. The objective of this paper is to investigate the cause of this phenomenon. On the basis of fracture resistance curve test results, strain hardening hypothesis, stress redistribution hypothesis and crack opening hypothesis were built. In this study, hardness tests, Automated Ball Indentation(ABI) tests, theoretical stress field analyses, and crack opening analyses were performed to prove the hypotheses. From this study, strain-hardening of material, generation of tensile residual stress at crack tip, and crack opening effects are proved as the causes of the decrease hypothesis.

• Journal of Korean Society of Water and Wastewater
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• v.19 no.1
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• pp.98-105
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• 2005

The effects of chlorination on the elimination of three estrogenic chemicals such as $17{\beta}$-estradiol (E2), nonylphenol (NP) and bis-phenol A (BPA) were investigated using yeast two-hybrid assay (YTA), estrogen receptor competition assay (ER-CA), and high-performance liquid chromatography/mass spectrometer (LC/MS). Results of YTA, ECA and the analysis of LC/MS indicated that the estrogenic activity of above mentioned three endocrine disruptors were significantly reduced as the result of chlorination. The decrease in estrogenic activity paralleled with decrease in estrogenic chemicals under the influence of free chlorine. One common characteristic of estrogenic chemicals is the presence of a phenolic ring. Considering that a phenolic ring is likely to undergo some sort of transformation in aqueous chlorination solution, the above mentioned results may be applied to the rest of the other estrogenic chemicals in natural waters.