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2채널 뇌기능 감시 시스템을 위한 뇌파 소프트웨어의 개발
김동준,유선국,김선호,Kim, Dong-Jun,Yu, Seon-Guk,Kim, Seon-Ho 대한의용생체공학회 1999 의공학회지 Vol.20 No.1
본 연구에서는 수술이나 환자 모니터링시 무의식 상태 환자의 뇌혈류량에 대한 정확한 모니터링으로 뇌허혈 현상을 방지하기 위하여 2채널 양극성 아날로그 EEG를 디지털로 처리하여 다양한 뇌파 관련 파라미터를 추출하여 실시간으로 한 화면에 디스플레이하고, 또한 임상의사들이 사용하기 편리한 뇌파 감시 소프트웨어를 개발하고자 하였다. 이를 위하여 EEG-데이터를 FFT 연산 후 CSA 및 DSA의 형태로 표현하며, 기타 다양한 뇌파관련 파라미터를 추출한 후 한 화면에서 실시간으로 디스플레이하고, 사용 편리성도 극대화하도록 프로그램하였다. 프로그램은 개발 도중에 여러 번의 동물실험 및 임상실험을 통하여 개선 보완되었으며, EEG, CSA, DSA 및 알파비, 퍼센트 델타 스펙트럼 모서리 주파수, 전체 파워, 전체 파워의 차 등의 주요 뇌파 파라미터들을 한 화면에서 관찰하게 되어 환자 상태의 종합적인 간찰이 가능하며, 나중에 저장된 EEG 파일을 재검토할 수 있다. 또한 CSA, DSA, 스펙트럼 모서리 주파수 및 전체 파워는 원하는 부분에서 표본을 취해 화면 위쪽에 최대 3개까지 붙여 놓고 동시에 비교할 수 있으므로 환자 상태의 객관적인 비교가 가능하고, 환자상태, 응급처치 등에 대한 기록사항을 입력할 수 있어서 저장된 EEG 파일의 검토시 이들 event로 즉시 찾아가는 기능이 있으며, 그 외에도 앞 뒤 점프 이동 기능, 이득 조절 기능, 윈도우 환경에서의 파일관리 기능 등을 갖추고 있고, 프로그램이 윈도우 환경에서 개발되어 마우스에 의해 대부분의 동작이 이루어진다. 개발된 프로그램을 이용한 대학병원의 임상실험결과, 환자상태의 변화에 매우 민감하게 반응하고, 또한 임상의사들이 이용하기에도 매우 편리하다는 평가를 받았다. This paper describes an EEG(electroencephalogram) software for two-channel cerebral function monitoring system to detect the cerebral ischemia. In the software, two-channel bipolar analog EEG signals are digitized and from the signals various EEG parameters are extracted and displayed on a monitor in real-time. Digitized EEG signal is transformed by FFT(Fast Fourier transform) and represented as CSA(compressed spectral array) and DSA(density spectral array). Additional 5 parameters, such as alpha ratio, percent delta, spectral edge frequency, total power, and difference in total power, are estimated using the FFT spectra. All of these are effectively merged in a monitor and displayed in real-time. Through animal experiments and clinical trials on men, the software is modified and enhanced. Since the software provides raw EEG, CSA, DSA, simultaneously with additional 5 parameters in a monitor, it is possible to observe patients multilaterally. For easy comparison of patient's status, reference patterns of CSA, DSA can be captured and displayed on top of the monitor. And user can mark events of surgical operation and patient's conditions on the software, this allow him jump to the points of events directly, when reviewing the recorded EEG file afterwards. Other functions, such as forward/backward jump, gain control, file management are equipped and these are operated by simple mouse click. Clinical tests in a university hospital show that the software responds accurately according to the conditions of patients and medical doctors can use the software easily.
미기후를 고려한 권역별 철근콘크리트조 리모델링 성능 기준안 연구 -부천시를 중심으로-
김동준,박종일,김태룡,최정만 한국생활환경학회 2022 한국생활환경학회지 Vol.29 No.6
The purpose of this study is to propose remodeling performance considering the microclimate of each region in Bucheon. In order to propose the performance criteria, regional classification of previous microclimate studies was used. The insulation level was analyzed during the remodeling of the reinforced concrete structure using the lowest temperature by region. The appropriate insulation level was suggested as a level at which mold does not occur through 2d heat transfer analysis. In the analysis, different surface transfer resistance values were used to consider the living environment of occupants. As a result of the analysis, different insulation thicknesses were required for each District in Bucheon. This means that regional microclimate considerations are required for economic remodeling. This study proposed an appropriate insulation thickness that escapes the surface temperature defect, but has a limitation in that it did not consider the defect inside the wall.
Perforated Mitral Valve Aneurysm in the Posterior Leaflet without Infective Endocarditis
김동준,조경임,전희재,김유정,송여정,지준형,천민구,김성만,이현국,김태익 한국심초음파학회 2012 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.20 No.2
Aneurysm of the mitral valve, although uncommon, occurs most commonly in association with infective endocarditis of the aortic valve and true mitral valve aneurysm is a rare cause of mitral regurgitation. We report a case with perforated mitral valve aneurysm in the posterior leaflet without concurrent infective endocarditis initially mistaken diagnosis of cystic mass, which was confirmed at operation with successful mitral valve annuloplasty.
특허법상 속지주의: 대법원 2019다222782, 222799 판결의 의미와 과제
김동준 경북대학교 IT와 법연구소 2021 IT와 법 연구 Vol.0 No.22
Since cross-border working of a patented invention is increasing due to the globalization and international networking, it is difficult to determine the country where a patented invention is being worked. The meaning of “makes” in this context was the subject of consideration by the Supreme Court in case No. 2019 Da 222782, 222799 (Merged) (hereinafter the “Decision”). The case concerned the question of whether making all or a substantial portion of the constituent parts of a patented product as a collection so that they may easily be put together to the complete product might amount to direct infringement. The Decision, while recognizing the necessity of flexible interpretation of territoriality, laid down a rather strict test for recognizing domestic manufacture of a patented product. The test should be understood in the context of the case. When applying the test laid down by the Decision to a case in dispute, it should be scrutinized whether there is a similarity between the case in dispute and the case of the Decision. The Decision held that making a kit of parts might amount to making of a complete product under certain circumstances. In other words, the issue considered in the Decision was not an indirect infringement but a direct infringement. However, the Supreme Court in case No. 2014 Da 42110 considered the issue of indirect infringement where an unfinished product was exported for the final processing abroad. Thus, there is no conflict between these two decisions. The two decisions, when read together, state as follows: (1) There is a direct infringement where making a kit of parts could be deemed as making a complete product under the test according to the Decision; or (2) There is neither direct nor indirect infringement where there is only a preparatory act of making an unfinished product that could not be deemed as making a complete product. The flexible application of the territoriality principle in patent law has been recognized by the Supreme Court in the Decision. However, it is necessary to clarify the scope of application of the Decision. Furthermore, the meaning of other acts of working an invention than the act of making should be clarified in the context of territoriality. In addition, it should be considered whether it would be necessary to take legislative actions like the U.S.