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Analysis of Imported Cargo Radiation Monitoring System in Korea
Wo Suk Choi,Sung Jun Kim,Jin Ho Son,Hwa Pyoung Kim,Chang Ju Song,Ji Ung Kim,Tae Young Kong 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
After the Fukushima nuclear accident in Japan in March 2011, many Koreans were concerned that products exposed to radioactive materials released from the nuclear power plant would be imported into Korea. Systematic radiation monitoring was required for food and daily necessities imported from the nuclear accident area. The need for a legal system to support systematic radiation monitoring was also demanded. The Act on Protective Action Guidelines against Radiation in the Natural Environment was enacted to resolve concerns regarding environmental radiation in Korea in July 2011. According to this law, radiation monitoring equipment has been installed and operated at major airports and ports nationwide. This paper aims to review the radiation monitoring system of the Korean government comprehensively. The legal system and the legal basis for radiation monitoring of imported cargo conducted by each department were investigated by analyzing the laws and regulations of radiation monitoring for the relevant cargo items. In addition, the current status of radiation monitoring by the government departments was examined to determine how radiation monitoring for imported cargo is performed within the legal system. The investigation of the current radiation monitoring system for imported cargo in Korea confirmed that radiation monitoring is conducted by classifying cargo items under the jurisdiction of each government department for all imported cargo. However, the reduction in efficiency of radiation monitoring of imported cargoes, unclear legal grounds for radiation monitoring of imported cargo by some departments, the occurrence of overlapping inspections by departments, and the difficult process of issuing the radiation test certificate required for customs clearance by the Korea Customs Service were also identified. As a result of the analysis, it was found that the current radiation monitoring system for imported cargo in Korea ought to be improved, taking into account efficiency, overlapping inspection, legal background, and the difficult process of issuing the certificates.
Easy Diagnosis of Asthma: Computer-Assisted, Symptom-Based Diagnosis
Choi, Byoung Whui,Yoo, Kwang-Ha,Jeong, Jae-Won,Yoon, Ho Joo,Kim, Sang-Heon,Park, Yong-Mean,Kim, Wo-Kyung,Oh, Jae-Won,Rha, Yeong-Ho,Pyun, Bok-Yang,Chang, Suk-Il,Moon, Hee-Bom,Kim, You-Young,Cho, Sang-H KOREAN ACADEMY OF MEDICAL SCIENCE 2007 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.22 No.5
<P>Diagnosis of asthma is often challenging in primary-care physicians due to lack of tools measuring airway obstruction and variability. Symptom-based diagnosis of asthma utilizing objective diagnostic parameters and appropriate software would be useful in clinical practice. A total of 302 adult patients with respiratory symptoms responded to a questionnaire regarding asthma symptoms and provoking factors. Questions were asked and recorded by physicians into a computer program. A definite diagnosis of asthma was made based on a positive response to methacholine bronchial provocation or bronchodilator response (BDR) testing. Multivariate logistic regression analysis was used to evaluate the significance of questionnaire responses in terms of discriminating asthmatics. Asthmatic patients showed higher total symptom scores than non-asthmatics (mean 5.93 vs. 4.93; <I>p</I><0.01). Multivariate logistic regression analysis identified that response to questions concerning the following significantly discriminated asthmatics; wheezing with dyspnea, which is aggravated at night, and by exercise, cold air, and upper respiratory infection. Moreover, the presence of these symptoms was found to agree significantly with definite diagnosis of asthma (by kappa statistics). Receiver-operating characteristic curve analysis revealed that the diagnostic accuracy of symptom-based diagnosis was high with an area under the curve of 0.647±0.033. Using a computer-assisted symptom-based diagnosis program, it is possible to increase the accuracy of diagnosing asthma in general practice, when the facilities required to evaluate airway hyperresponsiveness or BDR are unavailable.</P>
최대호,박철우,이순길,오연균,오광수,윤향석,김종덕 圓光大學校 醫科學硏究所 1991 圓光醫科學 Vol.7 No.1-2
We experienced a case of infectious mononucleosis with facial palsy in 14 month-old male, who was admitted with chief complaints of fever, cervical lymphadenopahty and facial deviation with swelling. Peripheral blood showed absolute lymphocytosis with 61% atypical lymphocytes. Although Heterophil antibody test was not significant, EBNA (Epstein-Barr nuclear antigen) antibody test was positive. So, We reported this case and review related literatures briefly.
Jin Ho Son,Sung Jun Kim,Wo Suk Choi,Chang Ju Song,Hwa Pyoung Kim,Hee Jin Kim,Se Eun Koo,Tae Young Kong 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
The Kori Unit 1 and Wolsong Units 1, commercial reactors in South Korea, were permanently shut down due to the expiration of their design lifetime. Therefore, nuclear power plants that have been permanently shut down must be dismantled, and the site must be finally released after removing the remaining radionuclides. Domestic regulatory standards for site remediation should not exceed 0.1 mSv per year based on effective dose. In addition, it is necessary to calculate the preliminary Derived Concentration Guideline Levels (DCGL) to prove that the conditions are met. Therefore, in this study, the input factor considering the geological characteristics of the site of Kori Unit 1 was investigated, and the preliminary Derived Concentration Guideline Levels were calculated and compared with the results of previous studies. As a result of comparative analysis, 60Co, 134Cs, and 137Cs, which are gamma-ray emitting radionuclides, had similar values to DCGL of previous studies A and B. However, 63Ni, a beta-rayemitting nuclide, was 5.94×104 Bq·g?1 in this study and 8.47×101 Bq·g?1in previous study B, resulting in a difference of about 700 times. In addition, in the case of 90Sr, this study and previous study A were derived similarly, but this study was 5.34×101 Bq·g?1 and previous study B was 1.18×10?1 Bq·g?1, resulting in a difference of about 450 times. This difference is judged to be because, unlike this study using only the industrial worker scenario, in the case of previous study B, the resident farmer scenario was mixed and used, which considers the internal exposure caused by ingestion of food produced in the contaminated area. In this study, it was confirmed that DCGL according to the change of geological factors of the site did not have a significant effect on gamma-ray-emitting nuclides. However, it was confirmed that considering the intake of food affects the DCGL of beta-ray-emitting nuclides. Therefore, there is a need to conduct future studies applying intake input factors that meet domestic conditions.
RS485 기반 다수 노드 제어용 저속통신망에서의 CSMA/CD 기법 적용 및 성능 개선 방안
김민기(Min Ki Kim),최용우(Yong Wo Choi),박동찬(Dong Chan Park),김석찬(Suk Chan Kim) 한국산업정보학회 2015 한국산업정보학회논문지 Vol.20 No.1
본 논문에서는 저속이지만 다수 노드의 연결이 요구되는 산업용 제어통신망, 홈네트워크 등에서 널리 사용되는 RS485에 적용할 수 있는 CSMA/CD 기법을 제안하고, 기존의 Master-Slave 프로토콜인 Modbus와 성능을 비교하였다. 모의실험을 위해 실제 산업용 제어통신망을 모델링 하였고, 모의실험을 통하여 여러 전송속도에서 평균 전송 지연시간과 처리량이 크게 개선됨을 보였다. In this paper, we suggested a RS485 based CSMA/CD protocol that is available in low speed multi-node networks such as industry control communication network and home network etc. The suggested protocol was compared to widely used Master-Slave protocol, Modbus. We modeled realistic control network and showed that the average delay and throughput performance were significantly improved in the different transmission rates.
Hwa Pyoung Kim,Seong Jun Kim,Jin Ho Son,Chang Ju Song,Wo Suk Choi,Ji Ung Kim,Tae Young Kong 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
As of 2023, there are a total of 24 nuclear power plants (NPPs) in operation in Korea, with 21 pressurized water reactors (PWRs) and three pressurized heavy water reactors (PHWRs). Korean NPPs discharge radioactive effluents into the environment every year. Radioactive effluents from NPPs contain various radionuclides and materials, including 3H, 14C, Noble gas, particulates, and iodine Among the radioactive effluents discharged from Korean NPPs, 14C is a pure beta emitter with a half-life of 5,730 years. The human body can inhale and ingest 14C to cause internal exposure. In addition, the amount of 14C present in the environment is decreasing, but the amount of 14C discharged from NPPs is increasing. 14C discharged to the environment can be inhaled and ingested by the public around NPPs through various pathways. For this reason, it is very important to monitor and manage 14C because it affects the dose of the public around NPPs. Therefore, this study compared and analyzed the average emissions of 14C discharged from PWRs and PHWRs during the recent 10 years (2012-2021). An average of the public dose due to 14C released from NPPs depending on the reactor types from 2012 to 2021 was also compared. It is inevitable to discharge radioactive effluents while operating NPPs. Korea Hydro & Nuclear Power (KHNP) manages and monitors radioactive effluents released into the environment. According to a survey and analysis of 14C discharged from PWRs and PHWRs and the average dose of the public over the recent 10-year (2012-2021) around Korean NPPs, 14C released from PWR accounted for 3.1% of the total discharge but accounted for more than 93.67% of the total public dose. In addition, 14C discharged from PHWRs accounted for 1.12% of the total discharge, but its resulting dose to the public accounted for more than 83.87% of the total public dose. As a result of analyzing the public dose due to 14C from 2012 to 2021, it was gradually increasing every year. Based on these results, monitoring and managing 14C discharge and its resulting doses to the public are important in the future.