• 한국산학기술학회논문지
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• 제21권7호
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• pp.446-452
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• 2020

최근 어린이 통학버스 사용이 증가함에 따라 통학버스 운전자 및 동승 보호자의 과실로 인한 사고도 큰 폭으로 증가하고 있다. 정부에서는 이를 방지하기 위한 다양한 정책들을 내놓고 있다. 이에 우리는 어린이 통학버스 사고 방지 및 안전 관리를 위한 시스템을 제안한다. 이 시스템을 이용하면 버스 운전자는 각 좌석별 어린이의 착석 여부와 안전벨트 사용 여부를 동시에 쉽게 확인할 수 있으므로 운전 중에도 어린이들의 상태에 따라 빠르게 대처 할 수 있다. 카메라로 찍히는 이미지를 실시간 분석하여 얼굴을 인식하는 기능이 있어서, 어린이들은 각자의 키에 맞게 길이가 자동 조절된 안전벨트를 사용할 수 있다. 따라서 교통사고 발생 시 발생 가능한 2차 상해를 방지할 수 있다. 또한 어린이들이 버스에서 내린 것을 확인하기 위한 슬리핑 차일드 체크 시스템과 실시간으로 어린이의 위치를 부모에게 알려주기 위한 문자 서비스도 제공된다. 라즈베리파이를 기반으로 하여 모터, 카메라, 압력센서, 블루투스 모듈 등을 이용하여 구현되었다. 이것을 버스 모형에 부착하여 일련의 기능들이 정확하게 동작함을 확인하였다.

• 대한약침학회지
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• 제19권3호
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• pp.197-206
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• 2016

Introduction: This study aims to investigate the effects of acupuncture stimulation on the radial artery's pressure pulse wave, along with various hemodynamic parameters, and to explore the possible underlying mechanism of pulse diagnosis in healthy participants in their twenties. Methods and analysis: This study is a prospective, single-arm, exploratory clinical study. A total of 25 healthy participants, without regard to gender, in their twenties will be recruited by physicians. Written informed consent will be obtained from all participants. The participants will receive acupuncture once at ST36 on both sides. The radial arterial pulse waves will be measured on the left arm of the subjects by using an applicable pulse tonometric device (KIOM-PAS). On the right arm (appearing twice), electrocardiogram (ECG), photoplethysmogram (PPG), respiration and cardiac output (CO) signals, will be measured using a physiological data acquisition system (Biopac module), while the velocity of blood flow, and the diameter and the depth of the blood vessel will be measured using an ultrasonogram machine on the right arm (appearing twice). All measurements will be conducted before, during, and after acupuncture. The primary outcome will be the spectral energy at high frequencies above 10 Hz ($SE_{10-30Hz}$) calculated from the KIOM-PAS device signal. Secondary outcomes will be various variables obtained from the KIOM-PAS device, ECG, PPG, impedance cardiography modules, and an ultrasonogram machine. Discussion: The results of this trial will provide information regarding the physiological and the hemodynamic mechanisms underlying acupuncture stimulation and clinical evidence for the influence of acupuncture on the pressure pulse wave in the radial artery. Ethics and dissemination: This study was approved by the Institutional Review Board (IRB) of Kyung Hee University's Oriental Medical Center, Seoul, Korea (KOMCIRB-150818-HR-030). The study findings will be published in peer-reviewed journals and presented at national and international conferences. Trial registration number: This trial was registered with the Clinical Research Information Service (CRIS) at the Korea National Institute of Health (NIH), Republic of Korea (KCT0001663), which is a registry in the World Health Organization's (WHO's) Registry Network.

• 천문학회보
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• 제39권2호
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• pp.90-90
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• 2014

The Immersion Grating Infrared Spectrometer (IGRINS) is the first astronomical spectrograph that uses a silicon immersion grating as its dispersive element. IGRINS fully covers the H and K band atmospheric transmission windows in a single exposure. It is a compact high-resolution cross-dispersion spectrometer whose resolving power R is 40,000. An individual volume phase holographic grating serves as a secondary dispersing element for each of the H and K spectrograph arms. On the 2.7m Harlan J. Smith telescope at the McDonald Observatory, the slit size is $1^{{\prime}{\prime}}{\times}15^{{\prime}{\prime}}$. IGRINS has a plate scale of 0.27" pixel-1 on a $2048{\times}2048$ pixel Teledyne Scientific & Imaging HAWAII-2RG detector with a SIDECAR ASIC cryogenic controller. The instrument includes four subsystems; a calibration unit, an input relay optics module, a slit-viewing camera, and nearly identical H and K spectrograph modules. The use of a silicon immersion grating and a compact white pupil design allows the spectrograph collimated beam size to be 25mm, which permits the entire cryogenic system to be contained in a moderately sized ($0.96m{\times}0.6m{\times}0.38m$) rectangular Dewar. The fabrication and assembly of the optical and mechanical components were completed in 2013. From January to July of this year, we completed the system optical alignment and carried out commissioning observations on three runs to improve the efficiency of the instrument software and hardware. We describe the major design characteristics of the instrument including the system requirements and the technical strategy to meet them. We also present the instrumental performance test results derived from the commissioning runs at the McDonald Observatory.