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[논문]병렬 유전 알고리즘을 이용한 발전기 기동정지계획
김형수,문경준,박준호 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-
본 논문에서는 병렬 유전 알고리즘을 이용한 발전기 기동정지계획을 제안한다. 최소 기동 및 정지 시간 등과 같은 다양한 발전기의 제약조건을 만족시키면서 발전기 기동정지계획을 수립하는 문제는 비선형적이며 많은 국부해가 존재하므로 최적해를 탐색하는데 많은 시간이 소요된다. 이러한 문제점을 해결하기 위해 16개 의 프로세서를 가진 병렬 시스템과 이를 이용한 병렬 유전 알고리즘을 제안하였으며, 제안한 방법의 효용성을 검토하기위해 10기 및 26기의 전력계통에 적용하여 시율레이션을 시행하였다. 시율레이션 결과 기존의 방법에 비해 탐색속도를 개선하였고 우수한 해를 구할 수 있었다.
( Kyeong Ho Kim ),( Jun Ki Ahn ),( Young Bok Ryu ),( Jae Ho Baek ),( Su Kyoung Kim ),( Min A Bae ),( Man Sig Lee ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2015 No.-
Reuse, recycling and recovery (3R) of industrial wastes are common and encouraging in Korea. Industrial symbiosis is one of typical methods for implementing 3R and has been defined as engaging “traditionally separate industries in a collective approach to competitive advantage involving physical exchange of materials, energy, water, and by-products”. The keys to industrial symbiosis are collaboration and the synergistic possibilities offered by geographic proximity. Recently, several countries in East Asia such as Taiwan, South Korea, Japan and China are promoting ‘designed’ symbiosis networks in various industrial complexes based on their national Eco-industrial Park (EIP) demonstration programs. Despite the recently promoted EIP initiatives worldwide, only very few studies furnish the operational and functional details of ‘designed’ industrial symbiosis networks, starting from the planning to implementation stage. The production of terephthalic acid (TPA) in Korea is 6.5 million ton based on 2011. The production of waste generated in the process of TPA is about 15,000 ton/yr and included useful materials like residue TPA as well as isophthalic acid (iPA), benzoic acid (BA) and p-toluic acid (p-TL). Until now, TPA waste was incinerated due to high caloric value. This study was conducted for recovery of valuable materials from industrial waste and utilization of recovered material as an example of Korean EIP. In this study, the experiment was performed to separate above four materials from the waste by solvent (methanol and water) extraction. The solubility of TPA (0.1g/100g) for methanol is relatively low compared to other materials. Also the solubility of BA (68g/L at 95℃) and p-TL (11.6g/L at 98℃) for water is relatively high in comparison with other materials. Finally, BA was separated from p-TL by molecular distillation system. The purity of recovered materials was analyzed by ultra-high performance liquid chromatography (Waters Xevo TQ system). The recovery rate and purity of BA is 90% and 93%. The recovered BA could be recycled the companies which are produced plastic plasticizer and paints.
Ahnak gene deficiency promotes type II pneumocyte hyperplasia and lung tumor development in mice
Jun Won Park,Il Yong Kim,Dong Su Kyeong,Ji Won Choi,Hee Jung Lim,Jae Hoon Shin,Yo Na Kim,Seo Hyun Lee,Yeri Son,Mira Sohn,Jong Kyu Woo,Joseph H. Jeong,Cheolju Lee,Yun Soo Bae,Je Kyung Seong 한국실험동물학회 2018 한국실험동물학회 학술발표대회 논문집 Vol.2018 No.7
Study on the Distribution of Carbapenem-Resistant Enterobacteriaceae (CRE) in Busan, 2022
Kyeong-A Kim,Hye-sook Heo,Hye-jun Kim,Su-Jin Shin,Young-Ran Na 대한미생물학회 2023 Journal of Bacteriology and Virology Vol.53 No.2
This study was conducted on the incidence of as carbapenemase-resistant Entero-bacteriaceae (CRE) infection and carbapenemase-producing Enterobacteriaceae(CPE) gene distribution in Busan to prepare basic data for preventing the spreadof CRE infection by confirming the regional characteristics of CRE infection. Thetotal of 2,429 strains from 92 clinics were obtained from rectal swab, sputum,stool, urine, blood, wound, bile, transtracheal aspiration, pus, ascetic fluid, bronchialwashing, catheter tip, genital, skin, sore, tissue, from January to December 2022. The CRE infection was tested by the method tested by the Korea Disease Controland Prevention Agency (KDCA). Species identification was confirmed by VITEK 2. Klebsiella pneumoniae which was detected in 1,698 (70.2%), was the mostcommon isolated CRE, followed by Escherichia coli in 430 (17.8%), Enterobactercloacae 90 (3.7%) and Citrobacter freundii 44 (1.8%). Among the identifiedCREs, 2,029 (83.5%) strains were identified as CPE. More than half of the detectedCPE types were 1,680 (69.2%) of KPC-2 (Klebsiella pneumonia carbapenases-2),followed by 166 (6.8%) of NDM-1 (New Delhi metallo-β-lactamase-1), 58 (2.4%)of KPC-3, and 51 (2.4%) of NDM-5. These findings provide good basic data forcomprehensive surveillance of CREs, suggesting that KPC and NDM are widespreadin Busan. In the analyzed CRE samples, Ertapenem resistance was the most com-mon at 99.5%, imipenem resistance 72.3%, meropenem resistance 67.9%, anddoripenem resistance 48.7%. It is expected that this study can be used as basicdata for preparing suitable countermeasures against CRE infection in the com-munity in the future.
The effect of aircraft noise on sleep disturbance among the residents near a civilian airport
Kyeong Min Kwak,Young-Su Ju,Young-Jun Kwon,Yun Kyung Chung,Bong Kyu Kim,Hyunjoo Kim,Kanwoo Youn 대한직업환경의학회 2016 대한직업환경의학회지 Vol.28 No.-
Background: Aircraft noise is a major environmental noise problem. This study was conducted in order to investigate the relationship between sleep disturbance and exposure to aircraft noise on the residents who are living near an airport. Methods: There were 3308 residents (1403 in the high exposure group, 1428 in the low exposure group, and 477 in the non-exposure group) selected as the subjects for this study. The Insomnia severity Index (ISI) and Epworth Sleepiness Scale (ESS) questionnaires were used to evaluate sleep disturbance. Results: The mean ISI and ESS scores were 6.9 ± 6.4 and 5.5 ± 3.7, respectively, and the average scores were significantly greater in the aircraft noise exposure group, as compared to the non-exposure group. The percentage of the abnormal subjects, which were classified according to the results of the ISI and ESS, was also significantly greater in the noise exposure group, as compared to the control group. The odd ratios for insomnia and daytime hypersomnia were approximately 3 times higher in the noise exposure group, as compared to the control group. Conclusions: The prevalence of insomnia and daytime hypersomnia was higher in the aircraft noise exposure group, as compared to the control group. Further study is deemed necessary in order to clarify the causal relationship.
Cancer risk in patients with Peutz-Jeghers syndrome in Korea: a retrospective multi-center study
( Su Hwan Kim ),( Eun Ran Kim ),( Jae Jun Park ),( Eun Sun Kim ),( Hyeon Jeong Goong ),( Kyeong Ok Kim ),( Ji Hyung Nam ),( Yehyun Park ),( Sang Pyo Lee ),( Hyun Joo Jang ) 대한내과학회 2023 The Korean Journal of Internal Medicine Vol.38 No.2
Background/Aims: There have been little research on the cancer risks of patients with Peutz-Jeghers syndrome (PJS) in Korea. We aimed to investigate the clinical features of PJS patients and their cancer incidence rate. Methods: Patients with PJS from nine medical centers were enrolled. In those patients diagnosed with cancer, data obtained included the date of cancer diagnosis, the tumor location, and the cancer stage. The cumulative risks of gastrointestinal cancers and extra-gastrointestinal cancers were calculated using the Kaplan-Meier method. Results: A total of 96 PJS patients were included. The median age at diagnosis of PJS was 23.4 years. Cancer developed in 21 of the 96 patients (21.9%). The age of PJS diagnosis was widely distributed (0.9 to 72.4 years). The most common cancers were gastrointestinal cancer (n = 12) followed by breast cancer (n = 6). The cumulative lifetime cancer risk was calculated to be 62.1% at age 60. The cumulative lifetime gastrointestinal cancer risk was 47.1% at age 70. The cumulative lifetime extra- gastrointestinal cancer risk was 40.3% at age 60. Conclusions: PJS onset may occur at any age and the risks of gastrointestinal and extra-gastrointestinal cancer are high. Thorough surveillance of PJS patients for malignancies is vital.