• Atmosphere
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• v.32 no.1
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• pp.27-37
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• 2022

The Korean Integrated Model (KIM) forecast system was extended to assimilate Horizontal Line-Of-Sight (HLOS) wind observations from the Atmospheric Laser Doppler Instrument (ALADIN) on board the Atmospheric Dynamic Mission (ADM)-Aeolus satellite. Quality control procedures were developed to assess the HLOS wind data quality, and observation operators added to the KIM three-dimensional variational data assimilation system to support the new observed variables. In a global cycling experiment, assimilation of ALADIN observations led to reductions in average root-mean-square error of 2.1% and 1.3% for the zonal and meridional wind analyses when compared against European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecast System (IFS) analyses. Even though the observable variable is wind, the assimilation of ALADIN observation had an overall positive impact on the analyses of other variables, such as temperature and specific humidity. As a result, the KIM 72-hour wind forecast fields were improved in the Southern Hemisphere poleward of 30 degrees.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.496-498
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• 2022

With the prolonged spread of the new coronavirus infection worldwide and the entry of the super-aged society, smart health care, which combines IT technology for senior health care and the health care industry, is emerging as a solution to the aging problem. The development of non-face-to-face care services using Ai is on a global trend, not in some countries, and the form of care services for the elderly using AI artificial intelligence technology is changing rapidly. The convenience of AI-based care services for the elderly is expected to be highlighted, and the technology and market are expected to develop significantly. As the number of single-person households is increasing, the shortage of welfare workers for the elderly is emerging as a social issue. It is presented as a vision to solve long-term social problems such as the labor shortage of elderly care workers as well as the advantages of convenient care services using IT technology. Therefore, we would like to propose the development direction of care services for the elderly as a case study of care services for the elderly and a countermeasure against the super-aging age.

• Information Systems Review
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• v.22 no.4
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• pp.115-134
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• 2020

Previous studies on willingness to pay for digital content have mainly focused on audience factors and individual level. To complement the limitation of previous research, this study conducts a multilevel analysis to find the factors influence digital content purchases considering two axes: audience/media factors and individual/household levels. Using a sample of 10,172 individuals within 4,313 households, the analysis results show individual media factors including theater-going, experience with cloud services, and multi-screen service usage have the greatest effects on digital content purchases. At the household level, the media ownership factors that the number of laptops, wireless routers, and tablets have a greater influence than audience factors such as household size or household income. Our findings help scholars to enhance the understanding of individuals' media use considering household environmental factors and shed light on the importance of multi-screen service usage, and content providers to improve their digital content sales using multi-screen environment.

• Information Systems Review
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• v.22 no.2
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• pp.1-24
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• 2020

Cloud computing technology is expanding its services to individual consumers through storage and applications. This study aims to compare the predisposing factors that affect the perceived value and the intention to use between users who have used or experienced services and those who have never experienced services from the perspective of benefit and sacrifice based on the value-based acceptance model. The results showed that the sacrifice factor (perceived cost) had a significant effect on perceived value and perceived value had a significant effect on intention to use, but showed a difference in perceived benefit. Perceived usefulness, ubiquity, and network effects had significant impact for experienced users' perceived value, but for inexperienced users, ubiquity did not have significant impact. In addition, usefulness was the most significant factor for experienced users while network effect was the same for inexperienced users. The results of this study suggest that consumers' intention to use personal cloud service is evaluated as a benefit and sacrifice point and a new attempt to re-examine the role of previous experience.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.34 no.1
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• pp.71-82
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• 2016

Through literature review and on-site survey of Gimcheon Bangcho pavilion(芳草亭), the features of garden design(庭園意匠) including geographic conditions, landscape modeling of Nujeong(樓亭) and Jidang(池塘, Pond), and scenic interpretations in Nujeong Jeiyoung poetry(樓亭題詠詩) have been carefully researched and the findings are presented below. Bangcho pavilion is located in a village called Wonteomaeul, which belongs to the feng shui state of golden hairpin and floating lotus. It has long been the cultural hub of communication and social interactions among the villagers. The Head House of Jeongyanggong(靖襄公宗宅), the main house(本第) of the Yeonan Yi Clan(延安李氏), is about 150m away from Bangcho pavilion, an artistic space whose landscape modeling is of the form called Nujeong. The name 'Bangcho' reflects the noble man(君子)'s determination: "I yearn for the place where honey parrots fly and the fragrant grass grow." From the two story structure of the pavilion where there is an additional floor installed to the central ondol room by a four-sided subdivision door, one can detect the aspiration of the men for pursuing an open view. One can also observe the efforts in designing the room to be used for multiple purposes from a private place to an office for periodic publication of a family lineage document called "Garyejunghae(家禮增解)". Bangcho pavilion's main sight of interest is Mrs Choi's Pond(崔氏潭), the one and only garden structure that comprises the twin round island of square pond(方池雙圓島) among the existing Jidangs in Korea. In this special Jidang, there are two coexisting islands that represent a well thought out garden facility for symbolizing conjugal affection and unyielding fidelity between master and servent(主從). In addition, the three inflows and one outflow facing the Ramcheon valley is regarded as an ideal garden design optimized for performing the function of a village bangjuk which is the site for undercurrent creation and ecological reprocessing. At present, Giant pussy willow is the only circular vegetation identified in the area of Bangcho pavilion, although this plant species is about to wither away judging from the signs of decrepitude that seems to persist for two out of three weeks. The old pine tree that appears in the 1872 Jeiyoung poetry of Byeongseon Song(宋秉璿) no longer exists. Anjae(安齋) Jang Yoo(張瑠)'s "Eight Scenary on Bangcho pavilion(芳草亭八詠)" and its expansive reproduction "Ten Scenary on Bangcho pavilion(芳草亭十景)" from Gwagang(守岡) Lee Manyoung(李晩永) depict vividly the pastoric scenery of an idyll(田園景) that stretches throughout the natural and cultural landscape of the province of Gimcheon and Guseong surrounding the Bangcho pavilion. The Bangcho pavilion sutra aims to establish Bangcho pavilion and the village of Wonteomaeul as the centre of microcosmos by dividing and allocating its scenic features according to the four seasons and times(四季四時), the eight courses(八方) and the meteorological phenomena, and it is the incarnation(顯現) of landscape perception upon the Byeol-seo Scenic site of Bangcho pavilion, the cultural hub of the region.

• Korean Journal of Pharmacognosy
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• v.49 no.2
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• pp.132-137
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• 2018

This study was conducted to investigate the effects of dietary Allium hookeri on growth performance, bone strength, and blood biochemical profiles in growing broiler chickens. Twelve hundreds of one-day old Arbor Acres male broilers were divided into 6 treatments with 4 replicates and 50 birds per replicate (n=200 chicks/treatment). Chickens fed basal diet (Control), basal diet with commercial X (Positive control) at 0.05% of diet, or each one of the experimental diets (L3, L5, R3, R5) supplemented with the powder of A. hookeri leaf or root at 0.3 and 0.5% of diet respectively for 5 weeks. At the 5th week of feeding the diets, body weight, tibia strength, and blood biochemical profiles including antibody titers were measured. Dietary A. hookeri (L3, L5, R3, R5) significantly increased final body weight than the control group. And the dietary leaf of A. hookeri effectively increased the growth performance than dietary root of A. hookeri. Interestingly dietary leaf of A. hookeri improved tibia strength than the control group and L3 showed the highest value. The antibody titers against infectious bursal disease (IBD) increased with the addition of dietary leaf of A. hookeri compared with positive control, R3, and R5 groups. But there was no significant difference in serum biochemical parameters such as albumin, globulin, glucose, cholesterol, Ca, P, total protein, total bilirubin, alanine aminotransferase, alkaline phosphatase, and gamma-glutamyl transferase. These results suggest that A. hookeri can be used as a good supplement to improve growth performance and health by increasing bone strength and antibody titer against IBD without any anti-nutritional or toxic effects in growing broilers.

• Korean Journal of Pharmacognosy
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• v.50 no.3
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• pp.219-225
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• 2019

This study was done to examine immunomodulative effects of aged doraji (AD) in the immune-suppressed mice induced by cyclophosphamide. The immune-stimulating effects of ethanol AD extract in in vivo at 75 and 150 mg/kg body weight (BW) for AD and 2AD groups were evaluated and compared to the normal doraji group (2ND, 150 mg/kg BW) treated with a doraji without aging process. After the 10 days of oral supplement, body and immune related organ weights, serum immunoglobulin G (IgG) and cytokines levels, splenocytes proliferation rate, and splenic NK cell activity were measured as immune-related biomarkers. Body weight and serum IgG level increased in the 2AD group. But, the serum Th2 cytokine (IL-6, $TNF-{\alpha}$) levels were lower in the AD and 2AD groups, respectively. Splenic T cell and B cell proliferation and NK cell activity increased in the doraji groups and the significant increases were found only in the 2AD group. Thus, the aged doraji extract may affect body weight, serum IgG level, splenocytes proliferation, and splenic NK cell activity, and normalize the Th2 cytokine levels in the immune-suppressed mice. The results suggest that the aged doraji improves effectively immune system rather than the normal one.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.35 no.1
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• pp.38-47
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• 2022

Objectives : The purpose of this study is to analyze the characteristics of tinnitus patients according to the presence of headache. Methods : The medical records of 110 tinnitus patients who visited oo Korean Medicine Clinic from June 2019 to June 2021 were retrospectively reviewed. Clinical characteristics including gender, age, onset, cause, tinnitus site, severity of tinnitus and accompanied symptoms were analyzed. Results : Among all patients, 40s and 50s and chronic tinnitus over 1 year was the most frequent group. After an average of 2 months of treatment, 61 patients(55.5%) showed improvement, and there were prescribed more frequently 50s and 60s and with tinnitus grade mild to moderate group. The proportions of female(65%, p=0.012) and herbal dialectics which 'tonify and replenish' and 'tranquilize'(32.5%, p=0.043) were prescribed more frequently in patients with headache than those without headache. Dizziness, ear pain, heart symptoms, fatigue, and neck stiffness were more frequent in patients with headache(p<0.05). In patients with improvement in tinnitus, tinnitus grade improved significantly in patients with improvement in headache compared to those with no improvement in headache(1.83±0.79 vs 0.80±0.84, p=0.018). Conclusions : In tinnitus patients treated with Korean medicine, there was no significant difference in the improvement of tinnitus according to the presence or improvement of headache, but the patients with improvement of both tinnitus and headache showed significantly more degree of improvement in tinnitus severity than patients with only tinnitus improved. Based on these findings, further study is needed regarding the correlation headache and tinnitus in clinical setting.

• Microbiology and Biotechnology Letters
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• v.43 no.2
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• pp.142-149
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• 2015

Bioaerosols are comprised of particles 0.02-100 μm in size that originate in natural and artificial environments, and as a result of human activities. They consist of microorganisms including viruses, bacteria, fungi, and protozoa; fungal spores; microbial toxins; pollen; plant or animal material; expectorated liquid from humans; and glucans (peptidoglycan and β-glucan). Bioaerosols can cause respiratory and other diseases in humans and animals. In this study, bioaerosol samples acquired from agricultural sources, livestock, a sewage treatment plant, a beach, and a pristine area were analyzed to identify and phylogenetically characterize culturable microorganisms. The isolated bacteria exhibited regional differences, with different species dominating. However, Bacillus cereus was isolated in all samples, with a total of 31 strains isolated from all areas, and Acinetobacter baumannii was isolated from an indoor poultry farm. In addition, bacteria determined to be of novel genus or species of the genera Domibacillus, Chryceobacterium, Nocardioides and family Comamonadaceae were isolated from the agricultural, livestock and beach environments.

• Korean Journal of Veterinary Research
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• v.57 no.4
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• pp.215-222
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• 2017

Temporal and subcellular distributions of hyaluronic acid (HA) as a degradable nanoparticle (NP) in animals were investigated to determine if HA-NP could be utilized as an appropriate drug delivery system. After mice were intravenously injected with 5 mg/kg of Cy5.5-labeled HA-NP sized 350-400 nm or larger HA-polymers, the fluorescence intensity was measured in all homogenized organs from 0.5 h to 28 days. HA-NP was greatly detected in spleen, liver and kidney until day 28, while it was maintained at low levels in other organs. HA-polymer was observed at low levels in all organs. HA-NP quantities in spleen and liver were reduced until day 3, but increased sharply between days 3 and 7, then decreased again, while their HA-polymers were maintained at low levels until day 28. In kidneys, both HA-NP and HA-polymer showed high levels after 0.5 h of administration, but steadily decreased until day 28. According to ultrastructural analyses, HA-NP was engulfed in Kupffer cells of liver and macrophages of spleen and kidney at day 1 and was accumulated in the cytoplasm of kidney tubular cells at day 7. Overall, these findings suggest that HA-NP could be considered a desirable drug carrier in the liver, kidney, or spleen.