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김범수,최승원,김범수,류정선,서정기,이홍복 대한알레르기학회 1998 천식 및 알레르기 Vol.18 No.4
Eosinophilia accompanied by eosinophilic invasion and organ dysfunction may develope idiopathic hypereosinophilic syndrome. Any organ can be involved including bone marrow, lung, skin, heart, gastrointestinal tract and nervous system. Cough, dyspnea, pleural effusion or chest pain are common pulmonary manifestation, and they may be attributed to parenchymal infiltration, pulmonary embolism or heart failure. We report a 43-year-old woman with idiopathic hypereosinophilic syndrome involving bone marrow, skin, and lung. The patient developed acute dyspnea and chest pain. High resolution CT demonstrated multiple wedge-shaped segmental involvement with pleural effusion thought to be a pulmonary infarction or heart failure. Echocardiography could not find any abnormality. Lung biopsy showed interstitial eosinophilic infiltration with increased eosinophils in BAL fluid. She was treated with high dose corticosteroid and hydroxyurea. Within few days, most of her symptoms disappeared and chest radiography nearly cleared up.
벨로우즈 방식의 폐회로를 가진 공압식 심실 보조장치의 최적 작동을 위한 압력 조절 시스템
김범수,이정주,남경원,정기석,안치범,선경,Kim, Bum-Soo,Lee, Jung-Joo,Nam, Kyung-Won,Jeong, Gi-Seok,Ahn, Chi-Bum,Sun, Kyung 대한의용생체공학회 2007 의공학회지 Vol.28 No.4
Ventricular Assist Device(VAD) has switched its goal from a short-tenn use for bridge-to-transplantation to a long-tenn use for destination therapy, With this goal, the importance of long-tenn reliability gets more interests and importances, H-VAD is an portable extracorporeal biventricular assist device, and adopts an electro-pneumatic driving mechanism. The pneumatic pressure to pump out blood is generated with compression of bellows, and is transmitted in a closed pneumatic circuit through a pneumatic line. The existing pneumatic VAD adopts a air compressor which can generate stable pressures but has defects such as a noise and a size problem. Thus, it is not suitable for being used as a portable device, These problems are covered with adopting a closed pneumatic circuit mechanism with a bellows which has a small size and small noise generation, but it has defects that improper pneumatic setting causes a failure of adequate flow generation. In this study, the pneumatic pressure regulation system is developed to cover these defects of a bellows-type pneumatic VAD. The optimal pneumatic pressure conditions according to various afterload conditions for an optimal flow rate were investigated and the afterload estimation algorithm was developed, The final pneumatic regulation system estimates a current afterload and regulate the pneumatic pressure to the optimal point at a given afterload condition. The afterload estimation algorithm showed a sufficient performance that the standard deviation of error is 8.8 mmHg, The pneumatic pressure regulation system showed a sufficient performance that the flow rate was stably governed to various afterload conditions. In a further study, if a additional sensor such as ultrasonic sensor is developed to monitor the direct movement of diaphragm in a blood pump part, the reliability would be greatly increased. Moreover, if the afterload estimation algorithm gets more accuracy, it would be also helpful to monitor the hemodynamic condition of patients.
김범수,김승구,한영오,송형호,김보련 한국전자통신학회 2018 한국전자통신학회 논문지 Vol.13 No.6
We made a smartphone interlocking location tracking streetlight and remote display device to compensate the defect of real time identifiable CCTV streetlights and child safety notification applications. It controls brightness of LED by detecting surrounding brightness and objects with ultrasonic sensor and illuminance senor. CCTV receives the location of smartphone via Bluetooth and takes the target of the location. It realizes a wireless transmission system that the video is upload to the tablet PC via WiFi. 실시간으로 모습이 확인 가능한 CCTV 가로등과 어린이 안심 알리미 어플의 단점을 보완하기 위해 스마트폰 연동 위치추적 가로등과 원격 디스플레이 장치를 구현하였고 초음파 센서, 조도 센서로 주변 밝기와 물체를 감지해 LED의 밝기를 조절하도록 설계하였다. CCTV는 블루투스 통신을 통해 스마트폰의 위치를 전송받아 해당 위치의 대상을 촬영한다. 촬영된 영상은 WiFi를 통해 태블릿 PC로 무선 송출하는 시스템을 구현하였다.
김범수,한현우,박영준 한국농업기계학회 2020 바이오시스템공학 Vol.45 No.4
Purpose Noise and vibration measurement tests have been performed to analyze the source of noise in a utility terrain vehicle (UTV) gearbox to improve its quality. For accurate analysis of gearbox noise source, the effects of other test equipment should be separated from the gearbox noise results. In this study, the noise source of the gearbox was investigated through noise and vibration tests of the gearbox and dynamometer. Methods Noise and vibration were measured during gearbox and dynamometer run-up tests. Dominant noise types were identified through order tracking analysis of the test results. Results Some types of noise were identified in the Campbell diagram. By separating the effect of the inverter and dynamometer noise, it was confirmed that the 6.39th-, 12.78th-, 14th-, and 28th-order components were the sources of noise generated by the gearbox. Conclusions Dominant order components caused by the gearbox were identified. These components are expected to be used as excitation sources for the optimization of noise reduction in electric UTV gearboxes.