• The Journal of the Acoustical Society of Korea
• /
• v.41 no.5
• /
• pp.570-588
• /
• 2022

We scrutinized the acoustic outputs from the 70 shock wave generators of the 15 product models whose technical documents were available, among the 46 ballistic extracorporeal shock wave therapeutic devices of 11 domestic and 6 foreign manufacturers, approved by the Minster of Food & Drug Safety (Rep. Korea). We found that the acoustic Energy Flux Density (EFD), the most popular exposure parameter, was different by up to 563.64 times among shock wave generators at their minimum output settings and by up to 74.62 times at their maximum settings. In the same product model, the EFD was shown to vary depending on shock wave transmitters by up to 81.82 times at its minimum output setting and by up to 46.15 times at its maximum setting. The lowest EFD 0.013 mJ/mm² at the maximum output settings was much lower (2.1 %) than the maximum value 0.62 mJ/mm² at the minimum settings. The Large acoustic output differences (tens to hundreds of times)from the therapeutic devices approved for the same clinical indications imply that their therapeutic efficacy & safety may not be assured. The findings suggest the regulatory authority to revise her guideline to give clearer criteria for clinical approval and equality in performance, and recommend the authority to initiate a post-approval surveillance as well as a test in conformance between the data in technical documents and the real acoustic outputs clinically used.

• The Journal of the Korea Contents Association
• /
• v.22 no.9
• /
• pp.95-103
• /
• 2022

This study aims to understand a gamer participatory mechanism by comparing Gamer Participation 1.0(Bartz Liberation War) and Gamer Participation 2.0(Truck Demonstration). The process of gamers' political participation is analyzed by applying the communication-mediated O-S-O-R model with the case of gamers' truck protests caused by probability items' issue. This study found out that changes in the social, technological, and discursive layers that constitute the gamer's communication ecology led to diversification of communication channels and changes in the perception of games. Gamers utilized the technological layer of the media environment that presupposes immediate mutual communication, expressed opinions on issues in the mobilization process, and shared the necessity of participation to derive collective mobilization. Through communication, gamers were able to participate in socio-political issues with high participation thresholds. This study is significant in that it discussed the gamers' democratic citizenship and role as issue publics. The study suggests that the need for theoretical and methodological expansion to analyze various participatory cases.

• The Journal of Korean Medicine
• /
• v.42 no.2
• /
• pp.31-49
• /
• 2021

Objectives: The purpose of this study is to statistically analyze the demographic characteristics of patient who visited the department of Acupuncture & Moxibustion, korean medicine hospital(KMH) in Daejeon before and after COVID-19. Methods: This study retrospectively analyzed the medical records of 63,185 patients who received treatment at KMH in Daejeon for 3 years from January 1, 2018 to August 31, 2020. Data were classified by year, month, new/old type, gender, age and Disease group. IBM-SPSS-Statistics ver25.0. was used for the data analysis. Results: 1. According to the analysis by gender, the rate of new patients after COVID-19 outbreak was similar to that of the previous years. The old patients showed an increase in the rate of visits by men and a decrease in the rate of visits by women. 2. According to the analysis by age group, the rate of new patients was similar to that of the previous year. the rate of patients in their 20s and 50s decreased, and the rate of patients over 60 increased. 3. According to the analysis by frequent disease, after the outbreak of COVID-19, the number of patients decreased in 14 disease groups excluding cervical sprains among the 15 frequent disease groups. 4. For inpatients, even after COVID-19 outbreak, the results of all variables were similar to the previous years. Conclusions: After COVID-19, on outpatients, the percentage of female visits, the percentage of patients in their 20s to 50s and Number of patients with frequent disease decreased significantly. On Inpatients, the results of all variables were similar to those before COVID-19.

• The Korea Journal of Herbology
• /
• v.37 no.3
• /
• pp.29-39
• /
• 2022

Objective : This study is aimed to evaluate the protective effects of Rehmanniae Radix, Mori Folium, and Liriopie Tuber mixture (RML) on lung injury of Particulate matter less than 10 um in diameter and diesel exhaust particles (PM10D) mice model. Methods : To investigate the anti-inflammatory activity of RML, PM10D was diluted in aluminum hydroxide (Alum) in 7-week-old male mice and induced by Intra-Nazal-Tracheal (INT) injection method. Animal experiments were divided into 5 groups. Nor (normal mice), CTL (PM10D-induced mice with the administration of distilled water), DEXA (PM10D-induced mice with the administration of 3 mg/kg Dexamethasone), RML 100 (PM10D-induced mice treated with RML 100 mg/kg weight), and RML 200 (PM10D-induced mice treated with RML 200 mg/kg body weight). After 11 days administration, mice were sacrificed and inflammation-related immune cells in broncho-alveolar lavage fluid (BALF) were analyzed. Inflammation-related biomarkers were also analyzed in blood and lungs. Lung tissue was observed through histological examination. Results : In the PM10D induced model, the PML showed decreases in CXCL-1 and IL-17A in BALF. Expression of inflammatory cytokines and cough-related mRNA genes was significantly decreased in serum and lung tissue. The mixture treatment of RML significantly improved the immune related cells in the serum. In addition, histological observations showed a tendency to decrease the severity of lung injury. Conclusions : Overall, these results confirmed the respiratory protective effect of the RML mixture in a model of lung injury induced by air pollution (PM10+DEP), suggesting that it is a potential treatment for respiratory damage.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.34 no.1
• /
• pp.145-166
• /
• 2023

This study aims to analyze the research trends of English-language journals in Korean studies published in Korea. Data were collected from four English journals in Korean studies indexed in A&HCI and SCOPUS. A total of 1,840 were selected, including 768 articles of the Korea Journal, 466 articles of The Review of Korean Studies, 285 articles of the Seoul Journal of Korean Studies, and 321 articles of the Acta Koreana, in connection with content analysis, author analysis, author keyword frequency analysis, and topic modeling. In results, the domain research of Korean studies is Humanities, followed by Social Science, and Arts and Kinesiology. These three sectors have grown significantly in publishing numbers since 2000. The subject period of the study is in the order of the modern period, late Joseon, and Japanese colonial period. Authors from domestic affiliations made up 73.34% of the total, but the proportion of authors belonging to foreign institutions continued to increase. As for author keywords, 'Korea'(41), 'Buddhism'(20), 'Koreanwar'(18), and 'Joseon'(18) were derived as top keywords. In topic modeling, six topics were identified; 'Korean culture, cultural transmission,' 'Korean modern political history,' 'Korean social democratization process,' 'Japanese colonial period,' 'Korean religious philosophy,' and 'Korean ancient history.' Through this study, it was possible to identify the interests in and research areas of the recent international academic community of Korean studies.

• Journal of Korean Society of Archives and Records Management
• /
• v.22 no.4
• /
• pp.151-174
• /
• 2022

Archival descriptions are significant in utilizing archives, as they are important tools for archival research and use. Meanwhile, content services are key services in modern society, where the use of archives and the importance of content are increasing. In this study, archival descriptions and content services were not viewed as different areas but as a relationship that could advance complementarily. This is because if archival descriptions are rich and well-prepared, high-quality content can be produced based on them, and archival descriptions can be enriched if well-made content is supplemented or linked to the descriptions again. This study intends to reveal the complementary relationship between archival descriptions and content services and propose an advancement plan based on this relationship. As such, the current status and problems of the archival descriptions and content services of the National Archives of Korea and the Presidential Archives website were analyzed, and the UK's National Archives (TNA), the USA's National Archives and Records Administration (NARA), the Seoul Metropolitan Archives, and the Korea Democracy Foundation's Open Archives were selected as exemplary cases for comparison. Based on the implications of the six analyzed institutions, an advancement plan for archival descriptions and content services, as well as a complementary development plan, was proposed. Through this study, it is expected that archival descriptions and content services will develop in a mutually complementary direction.

• Journal of Korean Elementary Science Education
• /
• v.41 no.4
• /
• pp.593-615
• /
• 2022

This study aimed to analyze the relationship between the observation ability and scientific creativity of elementary students through observation learning of outdoor plants and to identify the factors that influence the two constructs. The study recruited 21 fifth-graders in Seoul. After evaluating observation ability and scientific creativity through observation tasks, qualitative data were obtained through interviews with students about their observation of the plants. Additionally, the study collected various materials, such as the observation records and worksheets of the students to verify the validity of research. The main results of this study are as follows. First, the students were first classified into four groups according to levels of observation ability and scientific creativity. The result demonstrated that the higher the level of observation ability, the higher the level of scientific creativity. Second, observation ability and scientific creativity pointed to a positive correlation. Furthermore, originality, which is one of the components of scientific creativity, indicated a weak positive correlation with observation ability. Third, the factors that influenced observation ability were frequency of plant observation and interest and cooperation in observation learning, and those of scientific creativity were observation ability and the level of plant-related knowledge. Lastly, the study discussed educational methods for improving observation ability and scientific creativity.

• Analytical Science and Technology
• /
• v.35 no.6
• /
• pp.267-273
• /
• 2022

In this study, a quality evaluation was conducted to change the sell-by date of fish cakes to the use-by date. For product quality evaluation, storage conditions were set at 5, 10, and 15 ℃, and five tests of pH, acid value, volatile basic nitrogen, bacterial count, and coliform group were performed. As a result of the experiment, the quality safety limit period of fish cakes stored at 5 ℃ was 43 days, that of fish cakes stored at 10 ℃ were 30 days, and that of fish cakes stored at 15 ℃ was 7 days. Among the five test items used for quality evaluation, the quality-limit indicators were acid value, number of bacteria, and coliform groups. The index that determined the quality safety-limit period under the three storage conditions was the bacterial count. The sell-by date of the fish cake used in this experiment was 10 days. However, through quality evaluation, the use-by date at 10 ℃ was 28.5 days, which was calculated by multiplying the 30 days; the quality limit period, by a safety factor of 0.95. However, this study conducted a quality study on one item of fish cakes from a single company, and it was difficult to use the quality safety-limit period and use-by date set in this study universally. To change the sell-by date to the use-by date, extensive quality research on various products will be required. If this system is well established, it can help reduce food waste through proper consumption of food, and consumers will be able to consume food with confidence.

• The Korea Journal of Herbology
• /
• v.34 no.4
• /
• pp.27-35
• /
• 2019

Objectives : Osteoarthritis is characterized by degeneration of articular cartilage, which is characterized by chronic pain, stiffness and decrease range of motion. The present study was designed to compare the therapeutic effect of Dioscoreae Rhizoma water extract (DRW) and Dioscoreae Rhizoma 30% ethanol extract (DRE) on the monosodium iodoacetate (MIA)-induced osteoarthritis rats. Methods : Osteoarthritis was induced by injection of MIA ($50{\mu}{\ell}$ with $80mg/m{\ell}$) into the knee joint cavity of rats. After adaptation period for seven days, rats were divided by 5 groups (n=10/group): normal group, control group, positive control (indomethacin 5 mg/kg), DRW 200 mg/kg treated group, DRE 200 mg/kg treated group (n=10/group). The hind paw weight distribution was measured with the changes of reactive oxygen species (ROS), peroxynitrite ($ONOO^-$) in articulation tissue. Also, the cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), tumor necrosis factoralpha ($TNF{\alpha}$), interleukin-6 (IL-6), matrix metalloproteinase-1 (MMP-1), and tissue inhibitor of metalloproteinases-1 (TIMP-1) were investigated by western blot analysis. Results : The administration of DRW and DRE significantly decreased the hind paw weight distribution. The ROS and $ONOO^-$ levels of cartilaginous tissue were significantly decreased in DRW and DRE compared to control group. The results showed that DRE decreased inflammatory cytokines such as iNOS and $TNF{\alpha}$. Also DRE decreased MMP-1 and increased TIMP-1. Conclusions : Based on the above results, Dioscoreae Rhizoma extract seems to have the therapeutic effect on osteoarthritis via suppression of inflammation.

• The Korea Journal of Herbology
• /
• v.33 no.4
• /
• pp.101-108
• /
• 2018

Objectives : This study aimed to effects antioxidant activity of citrus peel extract (CPE) and effect on its glucose metabolism in L6 rat skeletal muscle cells. Methods : Antioxidative activities were evaluated by using 10 kinds of natural materials, and total polyphenol and flavonoid contents were examined. The L6 muscle cells toxicity of CPE was examined by MTT assay. Expression of glucose-related genes in L6 muscle cells by CPE treatment was analyzed by real-time PCR and western blotting. Results : The $IC_{50}$ values of DPPH and ABTS free radical scavenging activity of CPE were ($15.47{\pm}0.26{\mu}g/m{\ell}$ and $12.07{\pm}1.23{\mu}g/m{\ell}$, respectively), effectively clearing DPPH and ABTS. CPE showed total polyphenol and flavonoid contents ($20.30{\pm}0.38$ and $64.20{\pm}0.52$, respectively). The selected CPE were used in experiments using an effective concentration that is not toxic in L6 muscle cells. We investigated insulin receptor substrate-1 (IRS-1), phosphatidylinositol 3-kinase regulatory (PI3KR), Akt, and glucose transporter 4 (GLUT4). mRNA analysis by realtime PCR showed no significant difference, but CPE-treated cells showed a tendency to increase in concentration-dependent manner. However, analysis of protein expression of Akt and GLUT4 by western blotting showed that CPE treatment significantly increased concentration dependent (p<0.001). Conclusions : As a result, citrus peel extract with high antioxidant activity regulates glucose metabolism in L6 muscle cells. Therefore, CPE can be a potential treatment for the treatment of diabetes.