• Title/Summary/Keyword: electronic equipment

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Studies on Failure Kind Analysis of the Radiologic Medical Equipment in General Hospital (종합병원 진단용방사선장비의 고장유형 분석)

  • Lee, Woo-Cheul;Kim, Jeong-Lae
    • Journal of radiological science and technology
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    • v.22 no.2
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    • pp.33-39
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    • 1999
  • This paper included a data analysis of the unit of medical devices using mainternance recording card that had medical devices of unit failure mode, hospital of failure mode and MTBF. The results of the analysis were as follows : 1. Medical devices of unit failure mode was the highest in QC/PM such A hospital as 33.9%, B hospital 30.9%, C hospital 30.3%, second degree was the Electrical and Electronic failure such A hospital as 23.5%, B hospital 25.3%, C hospital 28%, third degree was mechanical failure such A hospital as 19.5%, B hospital 22.5%, C hospital 25.4%. 2. Hospital of failure mode was the highest in Mobile X-ray device(A hospital 62.5%, B hospital 69.5%, C hospital 37.4%), and was the lowest in Sono devices(A hospital 16.76%, B hospital 8.4%, C hospital 7%). 3. Mean time between failures(MTBT) was the highest in SONO devices and was the lowest in Mobile X-ray devices which have 200 - 400 failure hours. 4. Anverage failure ratio was the highest in Mobile X-ray devices(A hospital 31.3%, B hospital 34.8%, C hospital 18.7%), and was the lowest in Sono(Ultrasound) devices (A hospital 8.4%, B hospital 4.2%, C hospital 3.5%). 5. Failure ratio results of medical devices according to QC/PM part of unit failure mode were as follows ; A hospital was the highest part of QC/PM (50%) in Mamo X-ray device and was the lowest part of QC/PM(26.4%) in Castro X-ray. B hospital was the highest part of QC/PM(56%) in Mobile X-ray device, and the lowest part of QC/PM(12%) in Gastro X-ray. C hospital was the highest part of QC/PM(60%) in R/F X-ray device, and the lowest a part of QC/PM(21%) in Universal X-ray. It was found that the units responsible for most failure decreased by systematic management. We made the preventive maintenance schedule focusing on adjustement of operating and dust removal.

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Design for a Medical Devices Safety Information Reporting System for the Hospitals (의료기기 안전성 정보 원내 보고 시스템 설계)

  • Jang, Hye Jung;Choi, Young Deuk;Kim, Nam Hyun
    • Journal of the Institute of Electronics and Information Engineers
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    • v.52 no.1
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    • pp.140-147
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    • 2015
  • In this study, medical devices safety information reporting system was designed to manage medical devices for the efficient management of in-hospital adverse events. The current management of medical device adverse event reporting regulations and the legal status of the system and procedures for identifying the system were reviewed. MSF/CD(Microsoft Solution Framework/Component Design) was applied to the system design. Through this study, we can understand medical devices management including the notice provisions of the Ministry of Food and Drug Safety for medical devices safety information reporting. We also expect this study will help to improve patient safety and the effective management of medical equipment, and contribute to activating medical devices safety information reporting.

Bicycle Accident Position Tracing and Alarm System (자전거 사고 위치 추적 및 알림 시스템)

  • Kim, Jang-Won
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.14 no.6
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    • pp.93-98
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    • 2014
  • Bicycle accidents increase as the number of people riding bicycles increases following the trend try to enhance health and looking for alternative energy sources in the era of high oil price. In bicycle accident cases, physical risk is higher because the impact of the accident has a direct effect on the body of the rider. Therefore, the bicycle rider in an accident might unable to report the accident by themselves, thus, unable to quickly respond to the accident situation. This study developed a system for informing bicycle accidents upon bicycle accident by reporting and texting the accident location using a smart phone application after identifying the accident location using a GPS equipment based on the signal that senses the accident through the system installed in the bicycle for the purpose to improve bicycle riders' safety. This study confirmed the effectiveness of the system developed to quickly respond to the accident to prevent secondary damage through an experiment.

The danger and vulnerability of eavesdropping by using loud-speakers (스피커를 이용한 도청 위험에 대한 연구)

  • Lee, Seung Joon;Ha, Young Mok;Jo, Hyun Ju;Yoon, Ji Won
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.23 no.6
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    • pp.1157-1167
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    • 2013
  • The development of electronic devices has recently led to many problems such as personal information rape and leakage of business information. Conventional loud-speakers have been generally used to output devices. It can be, however, operated as a micro-phone which was abused as a means for eavesdropping since the speaker and microphone have basically the equivalent structure. Most importantly, the general peoples are not aware of the approaching danger about using speaker as microphone. And, traditional eavesdropping detection equipment does not check the attack. In this paper, we demonstrate that there is a serious danger and vulnerability in using loud-speakers since they can be used as eavesdropping devices.

Coast Evaluation Techniques for Mode Selection in Video Coding (동영상에서 모드 선택을 위한 코스트 평가 방법)

  • Song, Dae-Geon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.6
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    • pp.275-280
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    • 2013
  • Recently, access networking BroadBand the high performance of the video equipment to the Internet via voice, video, multimedia services, such as dealing with the media information dissemination is becoming increasingly attracting attention. More video devices and network environments in the future to keep pace with the high-quality video using the form dealing with an increasingly diversified and shall utilization is expected. Among them, video encoding technology, image compression encoding technology of information technology is one of the central role. Video coding technology that requires a vast amount of information contained in the video signal and the appropriate amount of information to eliminate redundancy as the efficiency of the digital code representing video signal is developed as a technology is going. Therefore, this study applied to video coding mode selection in the cost evaluation methods to examine and to maximize the coding efficiency and the proposed method compared to the conventional method was confirmed excellence.

Femtocell Searching Technique Using Synchronization Signals for Next-Generation Mobile Communication Systems (차세대 이동통신 시스템에서 동기신호를 이용한 펨토셀 탐색 기법)

  • Kim, Yeong Jun;Cho, Yong Soo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38A no.1
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    • pp.44-57
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    • 2013
  • In this paper, we propose a femtocell searching technique which can prevent a macrocell UE(user equipment) from losing synchronism to its serving macrocell near closed access femtocells in co-channel deployment due to the leakage of femtocell signals by using a CS(Common Signal). The CS, commonly transmitted by femtocells in a macrocell at the same time, enables the macrocell UEs to be kept synchronized with their serving macrocells since the CINR(Carrier to Interference and Noise Ratio) of base stations in macrocell can be kept high even near closed access femtocells. Also, the CS is designed in such a way that a macrocell UE can recognize the existence of femtocell by using the metric CSCINR(Common Signal Carrier to Interference and Ratio) measured with CS. In addition, the proposed femtocell searching technique can reduce the frequency of femtocell searching trial by using the metric on mobility of a macrocell UE defined in this paper, and the reduction of the frequency of handover trial can be also expected as a byproduct.

The Study on Development of Plating Technique on Electroless Ni/Au (무전해 니켈/금도금 기술 개발에 관한 연구)

  • Park Soo-Gil;Park Jong-Eun;Jung Seung-Jun;Yum Jae-Suk;Jun Sae-ho;Lee Ju-Seong
    • Journal of the Korean Electrochemical Society
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    • v.2 no.3
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    • pp.138-143
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    • 1999
  • Recently, miniaturization of large scale integrated circuits (LSI) and printed circuit board (PCB) have become essential with the downsizing of electronic devices. Gold electroplating is applied of conductivity wiring or terminals for improvement of conductivity and corrosion resistance. However, electroplating is not applicable since the circuits are becoming finer and denser. Accordingly, electroless plating is recently highly attractive method because of the simplicity of the operation requiring no external source of current and no elaborate equipment. In this work, we tried to develop a plating technique on electroless Ni/Au plating. First, the electroless Ni plating was deposited on the PCB with agitation in the bath at $85^{\circ}C$. Then the Au layer was deposited on the Ni layer surface by same method at $90^{\circ}C$. The bonderability were tested in order to evaluate the stability of the electroless Ni/Au by gold wire or solder ball test.

Implementation of Digital Light Drawing System based on Stereo Vision (스테레오 비전 기반 Light Drawing 시스템 구현)

  • Park, Won-Bae;Park, Chang-Bum;Paik, Doo-Won
    • The Journal of the Korea Contents Association
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    • v.10 no.2
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    • pp.130-137
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    • 2010
  • Light Drawing is a photographic technique which exposures are made at night or in a darkened room usually by moving a hand-held light source[1]. Due to the limitations of equipment and environment, users having difficulty in drawing a picture in 3D space. If user take a light drawing, they need a camera that have function and darkened environment. Alternative solution is that we can make a light drawing picture by using the computer drawing tool as in Photoshop. Nevertheless, this solution will let the User lose their interest in drawing because this solution cannot synchronize between the real action of human hand motion and the electronic input devices such as mouse and keyboard. This paper proposed a digital content that can make light drawing easier. We used a digital content that will facility Light Drawing easier. We can measure the light spot position by using the stereo camera. Based on the measured position of the light spot, we reproduce light drawing in virtual space by using drawing effect method.

Estimation of Dose Distribution on Carbon Ion Therapy Facility using Monte Carlo Simulation (몬테카를로 시뮬레이션을 이용한 중입자 치료실의 선량분포 추정)

  • Song, Yongkeun;Heo, Seunguk;Cho, Gyuseok;Choi, Sanghyun;Han, Moojae;Park, Jikoon
    • Journal of the Korean Society of Radiology
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    • v.11 no.6
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    • pp.437-442
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    • 2017
  • Heavy ion therapy has a high cure rate for cancer cell. So many countries are introducing heavy ion therapy facility. When treating a cancer using heavy ion therapy, neutrons and gamma rays are generated and affect electronic equipment. A budget of about KRW 200 billion is needed to build a heavy ion therapy facility, and it takes more than five years to build it. Therefore it is important to observe the dose distribution in the treatment room using the monte carlo simulation before construction. In this study, we used the FLUKA of monte carlo simulation to investigate the dose distribution in the heavy ion treatment room.

Development of Real-Time Simulator for a Heavy Duty Diesel Engine (건설기계 디젤엔진용 실시간 시뮬레이터 개발)

  • Noh, Young Chang;Park, Kyung Min;Oh, Byoung Gul;Ko, Min Seok;Kim, Nag In
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.39 no.2
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    • pp.203-209
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    • 2015
  • Recently, the portion of electronic control in an engine system has been increasing with the aim of meeting the requirements of emissions and fuel efficiency of the engine system in the construction machinery industry. Correspondingly, the complexity of the engine management system (EMS) has increased. This study developed an engine HiLS system for reducing the cost and time required for function development for the EMS. The engine model for HiLS is composed of air, fuel, torque, and dynamometer models. Further, the mean value method is applied to the developed HiLS engine model. This model is validated by its application to a heavy-duty diesel engine equipped with an exhaust gas recirculation system and a turbocharger. Test results demonstrate that the model has accuracy greater than 90 and also verify the feasibility of the virtual calibration process.