• Journal of Mechanical Science and Technology
• /
• 제20권4호
• /
• pp.494-504
• /
• 2006

This research proposes a reliability-based topology optimization (RBTO) using the finite element method. RBTO is a topology optimization based on probabilistic (or reliability) constraints. Young's modulus, thickness, and loading are considered as the uncertain variables and RBTO is applied to static and eigenvalue problems. The RBTO problems are formulated and a sensitivity analysis is performed. In order to compute probability constraints, two methods-RIA and PMA-are used. Several examples show the effectiveness of the proposed method by comparing the classical safety factor method.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2008년도 추계 학술발표회
• /
• pp.1175-1180
• /
• 2008

This study explored the compacition characteristics of organic weathered soils. Weathered soils were collected around the Gwangju University in Jinwol-dong, Gwangju city, and coal was used as organic material. Weathered soils were mixed with coal so that the ratio of organic elements against mixed soil can be 0%, 25%, 50%, and 75% respectively. Compaction tests were carried out on these organic mixture soils in different ratios of organic materials. And soap water instead of water in compaction tests was used. Through this study, We knew that the bigger the organic material ratio was, the more the optimum moisture content increased and the less the maximum dry unit weight reduced. In case of using small compaction energy, using soap water instead of water improved the compaction efficiency a little.

• 농촌의학ㆍ지역보건
• /
• 제47권2호
• /
• pp.109-120
• /
• 2022

Objectives: The purpose of this study was to identify the effectiveness of COVID-19 vaccinations on deaths of the COVID-19 cases in some elderly long-term care facilities (LTCF) in Gwangju Metropolitan City. Methods: The study subjects were 659 COVID-19 cases in residents of 7 elderly LTCF, Gwangju, from 21 Dec. 2021 to 28 Jan. 2022. The used variables were confirmed dates for COVID-19, demographic characteristics, co-morbidities, presentation of symptoms, death and vaccination related characteristics including type of vaccine, doses and dates. Vaccination status were classified as not vaccinated, partially and fully vaccinated. The associations of vaccination status and deaths of COVID-19 cases were tested by chi-square test and multiple logistic regression analysis. Results: The rates of not vaccinated, partially vaccinated and fully vaccinated were 19.4%, 10.2% and 70.4%, respectively. The mortality rate of the cases was 6.4%. The death rate by vaccination status was 16.4% in not vaccinated, 15.4% in partially vaccinated and 2.6% in fully vaccinated, showing a statistically significant difference. The adjusted odds ratios (ORs) (95% confidence intervals, CIs) of death compared to fully vaccinated were 7.64 (3.87-16.34) in non-vaccinated, and 6.97 (3.44-14.14) in partially vaccinated. Conclusions: COVID-19 vaccination seems to work effectively in preventing deaths of COVID-19 cases of elderly LTCF residents. This finding support that fully vaccinations in high risk group such as elderly LTCF residents is very important for one of strategies of COVID-19 management.

• 통상정보연구
• /
• 제11권3호
• /
• pp.239-262
• /
• 2009

This study shed light on the status of Korean Kimchi industry in overseas markets and presented methods for promoting Kimchi industry of Gwangju Jeonnam metropolitan city and stimulating the export of Kimchi produced in Gwangju Jeonnam, a city that has come to the fore as the center of Kimchi industry, which aimed to explore the ways of ratcheting up competitiveness of Kimchi industry in the global market as Kimchi has become more likely to be globalized amid the recent "Korea Trend" boom and the growing consumption of fermented food. Therefore, methods for promoting Kimchi industry and stimulating the export of Kimchi should be explored to ensure the promotion of Kimchi industry and the stimulation of the export of Kimchi, ultimately restoring the status of Korea as the home of Kimchi, in consideration of the great spillover effect on the regional economy, through a series of measures such as the clusterization of Kimchi industry, expansion of cultural experience projects related to Kimchi for the globalization and the increased consumption of Kimchi, government support to increase Kimchi companies in size and achieve the modernization of Kimchi companies, introduction of Kimchi KS audit system and quality certification system, development of new product targeting global market and making Kimchi a high-end product, expansion of export, support of export market diversification, assurance of safety and price competitiveness of Kimchi, differentiated production and marketing strategy by means of technological research, and others.

• 한국도서관정보학회지
• /
• 제47권2호
• /
• pp.387-416
• /
• 2016

이 연구는 광주광역시 남구 양림동의 도시기록화를 위한 사례연구이다. 이를 위하여 도시기록화 대상 대한 이론적 고찰과 도시재생 측면에서 양림동에 관련된 기록물들을 수집 조사하여 이를 분석하였다. 이를 기반으로 광주광역시 남구 방림동지역의 역사 문화적 사실을 배경으로 '선교'를 주제로 설정하여 기록화 사례를 제시하였다.

• 한국동물위생학회지
• /
• 제28권3호
• /
• pp.235-243
• /
• 2005

This surveies were carried out to investigate the residual levels of fluoroquinolones in chicken and quail eggs by bioassay and HPLC method. The eggs of 240 samples collected from market and farm in Gwangju Metropolitan city were examined from May to December in 2003. Residual antibiotic materials were detected from 47 samples of the 240 eggs by bioassay. Of the 240 eggs assayed, ciprofloxacin, danofloxacin, norfloxacin, ofloxacin, orbifloxacin and perfloxacin were not detected but enrofloxacin was detected from 5 samples in 228 chicken eggs and 1 sample in 12 quail eggs using HPLC with fluorescence detector by multi-residue method. 2 sample eggs in 6 sample which were detected by HPLC were not positive with bioassay. The average residual concentration of enrofloxacin was 0.494 mg/kg in 6 positive samples. The highest residual concentration of enrofloxacin was 1.83mg/kg.

• 한국초등과학교육학회지:초등과학교육
• /
• 제24권3호
• /
• pp.242-248
• /
• 2005

The purpose of this study was to survey the actual condition about field learning materials in Gwangju and Jeonnam area. The questionnaire was developed to examine teachers' perceptions and actual condition of a field teaming related science subject at 145 elementary schools in Gwangju city and Jeonnam province. The results of this study were as follows. First, the rate of school in performing field teaming related to 'strata and fossils' in science class was $6.8\%$. Second, the place of dianosaur track fossils in Jeonnam province, which was suitable for field teaming 'strata and fossils: were well known by $75\%$ of teachers. Also $68\%$ of teachers have not visited those places. On the basis of this result, the followings are proposed. First, field teaming materials and place should be developed in each school district. Second, field teaming strategies should be developed in various level. Third, some programs to study how to teach in the field teaming and experience the various field places should be suggested to preservice teachers as well as inservice teachers.

• 한국컴퓨터정보학회논문지
• /
• 제20권12호
• /
• pp.153-161
• /
• 2015

This study is intended to provide a basis for the planning of local governments to, analyzed in Gwangju Metropolitan City area D sixth regional health plans and Tertiary regional social welfare plans, establishing phase, the evaluation phase side. Based on the study results suggest the following implications. First, Specifically, it should be established to systematically planning process. Second, Plan's vision, key challenges, businesses are logical and details should be provided consistently. Third, It should be evaluated focusing on residents of the area change. Fourth, Change of plan indicators, performance indicators, etc. must be presented in detail.

• 한국수의병리학회지
• /
• 제5권2호
• /
• pp.43-48
• /
• 2001

Ducklings collected from three farms, having history of rapid onset and spread of nerve signs including kick spasmodically with legs and opisthotonos, were pathologically, barteriologically, virologically examined. Grossly, multiple petechial to ecchymotic hemorrhages were detected in the swollen liver. Histopathologically, diffuse coagulative necrosis of hepatocytes was characteristic in acute cases. Chronic cases revealed marked bile duct hyperplasia rather than hepatocyte necrosis. Some of these cases exhibited multiple granulomas consisting of macrophages, heterophil, fibrin and necrotic cell debri. Filtered homogenate of livers sampled from ducklings caused embryo death with marked hemorrhage and swollen of liver after inoculation into chorioallantoic membrane. Three strains of Salmonella app.,S montevideo, S hadar, and S give, which were biochemically and serologically identified, weir isolated from ducklings of three farms, respectively. From these results, these ducklings were concurrently infected with duck hepatitis virus and Salmonella spp.

• 한국주거학회논문집
• /
• 제25권4호
• /
• pp.101-110
• /
• 2014

This study is to suggest design types and to identify design characteristics of traditional style public buildings. Since the types of such buildings became very diverse recently, proper classification criteria is essential for future design and evaluation. The demand for such buildings is continuously increasing, but the types of design is very varied; thus it seems important to identify the present design conditions, and to be able to suggest desirable directions for better designs. The research analyzes 31 examples of public buildings in Gwangju Metropolitan City and South Jeolla Province, where there are large number of traditional style public buildings than anywhere else in Korea, and tried to analyzed site plan, elevation, space, details and organizes Design types. This study can help to roughly identify the problems of existing design as well as to suggest improvements in the future design.