• Korean Journal of Agricultural and Forest Meteorology
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• v.12 no.3
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• pp.197-206
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• 2010

To provide baseline information essential for assessing environmental impacts of monsoon rainfalls in a mountainous watershed under mixed land use, we investigated spatiotemporal variations in water quality using a combined approach of seasonal water quality survey and intensive storm samplings. Biannual water sampling at nine locations encompassing major land use types showed generally lower electrical conductivity and Cl- concentrations during the typical wet period compared to the dry period, indicating rainfall-induced dilution of dissolved ions. Total metal concentrations, however, were significantly higher during the monsoon period, probably associated with rainfall-induced increases in suspended sediments. Intensive storm sampling during a small monsoon rainfall event (18 mm) and an extreme event (452 mm) showed rapid changes in both suspended sediments and dissolved solutes in an agricultural stream draining the Haean Basin where arable lands have expanded rapidly over the recent decades. By contrast, a nearby forest stream derived from North Korea showed little responses to the small event compared to larges changes during the extreme event. In the agricultural stream total Pb concentrations showed significant positive relationships with suspended sediments. Although limited sampling frequency and locations require a cautious interpretation, the overall results suggest that expansion of agricultural fields in steep mountainous watersheds can increase the susceptibility of soil erosion and its off-site environmental impacts under increasing rainfall variability and extremes.

• Journal of Chest Surgery
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• v.47 no.4
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• pp.420-422
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• 2014

A 44-year-old pregnant female patient gave stillbirth while being treated for pneumonia. She developed acute respiratory failure, which resulted in mechanical ventilator support. Diagnostic lung biopsy revealed a cryptogenic organizing pneumonia. The patient's condition deteriorated and a venous-venous extracorporeal membrane oxygenation was placed. She was listed for lung transplantation. Because of her worsening condition lung transplantation was performed despite positive cross matching result. She was treated with rituximab, intravenous immunoglobulin, and plasmapheresis and recovered without event. There is no sign of rejection at the time of last follow-up.

• Journal of Astronomy and Space Sciences
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• v.32 no.4
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• pp.297-304
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• 2015

In this study, we documented the midlatitude F2-layer response to five strong geomagnetic storms with minimum Dst < -150 nT that occurred in solar minimum years using hourly values of the F2-layer critical frequency (foF2) from four ionosondes located in different hemispheres. The results were very limited, but they illustrated some peculiarities in the behavior of the F2-layer storm. During equinox, the characteristic ionospheric disturbance patterns over the Japanese station Wakkanai in the Northern Hemisphere and the Australian station Mundaring in the Southern Hemisphere were consistent with the well-known scenario by $Pr{\ddot{o}}lss$ (1993); however, during a December solstice magnetic storm, both stations did not observe any noticeable positive ionospheric disturbances. Over the "near-pole" European ionosonde, clear positive ionospheric storms were not observed during the events, but the "far-from-pole" Southern Hemisphere station Port Stanley showed prominent enhancements in F2-layer peak electron density in all magnetic storms except one. No event produced noticeable nighttime enhancements in foF2 over all four ionosondes.

• Culinary science and hospitality research
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• v.14 no.2
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• pp.99-114
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• 2008

The purpose of this study is to examine the relationships between each type of attitudes toward money and the attributes of choosing family restaurants. A self-administrated questionnaire was completed by 387 students, and data were analysed by frequency, factor, reliability and canonical correlation. Seven factors were obtained from factor analysis of attitudes toward money; Factor 1 "power", Factor 2 "obsession", Factor 3 "retention", Factor 4 "achievement", Factor 5 "anxiety", Factor 6 "distrust", and Factor7 "evaluation". The attributes of family restaurant choice were extracted into six factors: Factor 1 "quality of food", Factor 2 "restaurant event", Factor 3 "interior environment", Factor 4 "value of food", Factor 5 "convenience for approach", and Factor 6 "employees' service". Canonical correlation analysis showed three significant functions. Canonical function 1 showed that the attitudes of considering the power of money, its retention and achievement were indicated to have significantly positive relationships with the quality of food in the attributes of choosing family restaurants. Canonical function 2 showed that significantly negative relationships between distrust and restaurant events and convenience for approach. Canonical function 3 also showed that significantly positive relationships between obsession and anxiety and the interior of restaurants and employees' service, and significantly negative relationships between evaluation and the interior of restaurants and employees' service.

• Journal of Korea Game Society
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• v.21 no.2
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• pp.89-98
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• 2021

This study investigated the link between esports spectators and their tourism intention using value-attitude-behaviour hierachy(VAB) and co-branding. We've conducted a survey on Chinese who had a direct spectator experience on esports. Using a total of 311 samples, this study found that the link between the attitude of esports shows a positive effect on the tourism intention of the venue. Also, esports attributes have a positive relationship with the attitude of the venue.

• The Korean Journal of Physiology and Pharmacology
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• v.23 no.2
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• pp.131-139
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• 2019

Manually reviewing electroencephalograms (EEGs) is labor-intensive and demands automated seizure detection systems. To construct an efficient and robust event detector for experimental seizures from continuous EEG monitoring, we combined spectral analysis and deep neural networks. A deep neural network was trained to discriminate periodograms of 5-sec EEG segments from annotated convulsive seizures and the pre- and post-EEG segments. To use the entire EEG for training, a second network was trained with non-seizure EEGs that were misclassified as seizures by the first network. By sequentially applying the dual deep neural networks and simple pre- and post-processing, our autodetector identified all seizure events in 4,272 h of test EEG traces, with only 6 false positive events, corresponding to 100% sensitivity and 98% positive predictive value. Moreover, with pre-processing to reduce the computational burden, scanning and classifying 8,977 h of training and test EEG datasets took only 2.28 h with a personal computer. These results demonstrate that combining a basic feature extractor with dual deep neural networks and rule-based pre- and post-processing can detect convulsive seizures with great accuracy and low computational burden, highlighting the feasibility of our automated seizure detection algorithm.

• International Journal of Computer Science & Network Security
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• v.23 no.2
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• pp.13-30
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• 2023

Since the COVID-19 vaccine became available, people have been sharing their opinions on social media about getting vaccinated, causing discussions of the vaccine to trend on Twitter alongside certain events, making the website a rich data source. This paper explores people's perceptions regarding the COVID-19 vaccine during certain events and how these events influenced public opinion about the vaccine. The data consisted of tweets sent during seven important events that were gathered within 14 days of the first announcement of each event. These data represent people's reactions to these events without including irrelevant tweets. The study targeted tweets sent in Arabic from users located in Saudi Arabia. The data were classified as positive, negative, or neutral in tone. Four classifiers were used-support vector machine (SVM), naïve Bayes (NB), logistic regression (LOGR), and random forest (RF)-in addition to a deep learning model using BiLSTM. The results showed that the SVM achieved the highest accuracy, at 91%. Overall perceptions about the COVID-19 vaccine were 54% negative, 36% neutral, and 10% positive.

• Korean Journal of Clinical Laboratory Science
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• v.39 no.2
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• pp.104-112
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• 2007

The purpose of this study was to evaluate the general features of allergic patients in northwestern Chungcheongnamdo who visited Soonchunhyang University Cheonan Hospital. The subjects in this study were 1692 suspected allergic patients. After their allergic symptoms were checked and a MAST-CLA test was conducted, the following results were obtained: 1. The mean age of the subjects was 23.1 years old. The male patients represented 56.2% and the female patients accounted for 43.8%. 1387 (82.0%) patients of those investigated suffered from allergic disease. 2. Among the 1387 patients, 1022 (73.7%) patients showed an increased total IgE level. The positive rate of those who were in their 40s (87.0%) was the highest, but their age made no difference to their positive rate of total IgE. 3. Concerning the positive rate for allergen specific antibody by age, those who were in their teens (73.5%) topped the list and similar in all age group except in their 40s. By gender, the positive rate of the male and female were 56.3% and 43.9% respectively. Regarding the positive rates by allergic disease, those who suffered from allergic rhinitis (60.4%) were most vulnerable, followed by the patients with allergic dermatitis (47.4%), with bronchial asthma (47.2%) and with urticaria (39.4%). 4. As for seasonal positive rates, they were most susceptible in April (77.2%) and May (71.1%). We discovered a significant difference according to seasons; Spring (60.1%), Winter (45.4%) and Summer (39.2%). 5. In case of Korean inhalent panel, the most dominant allergen-specific antibodies were "Cockroach mix" (31.1%), followed by "D. pteronyssius" (23.8%) and "Dog" (14.3%). In the event of food panel, the most popular allergen-specific antibodies were "D. farinae" (25.0%), followed by "D. pteronyssinus" (19.8%) and "Hose dust" (12.0%). 6. The residential type made no difference to the positive rates of "House dust", "Cockroach mix" and "Dog" as major antigen but compared with others, positive rates for "Tick" were somewhat higher in apartment buildings.

• Journal of the Korean Institute of Landscape Architecture
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• v.23 no.4
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• pp.1-11
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• 1996

The purpose of this study was to suggest the more efficient system for management in urban park through the investigation of the managemental condition. Research sites for managemental condition were 9 municipal park managemental offices in Seoul, Pusan and Taegu. The degree of the managemental state in these parks was generally passive and low. So, each of them had to consider the ways how to buy private-owned sites, to standardize facility maintenance, to characterize the managemental objects, to enlarge managemental personnels and systems, to apply entrusting management, to plan user-service strategies and to shorten expenditures. Particularly the positive managemental improvement in user control was demanded to cope with the changing social needs. In long term, they had to develop basic elements for the reasonable park management, clear park maps, area of facilities, the event, citizen participation, budgets and etc., and had to prepare the middle-long term management plan and the precise analysis to the managemental criteria.

• Progress in Superconductivity and Cryogenics
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• v.5 no.1
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• pp.56-59
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• 2003

As electric power systems grow to supply the increasing electric power demand short-circuit current tends to increase and impose a severe burden on circuit breakers and power system apparatuses. Thus, all electric equipment in a power system has to he designed to withstand the mechanical and thermal stresses of potential short-circuit currents. Among current limiting devices, Fault Current Limiter (FCL) is expected to reduce the short-circuit current. Especially, Superconducting Fault Current Limiters (SFCL) offer ideal performance: in normal operation the SFCL is in its superconducting state and has negligible impedance, in the event of a fault, the transition into the normal conducting state passively limits the current. The SFCL using high-temperature superconductors offers a positive resolution to controlling fault-current levels on utility distribution and transmission networks. This study contributes to the EMTDC based modeling and simulation method of DC Reactor type SFCL. Single and three phase faults in the utility system with DC reactor type SFCLs have been simulated using EMTDC in order to coordinate with other equipments, and the results are discussed in detail.