• ETRI Journal
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• 제46권4호
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• pp.671-682
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• 2024

Violence can be committed anywhere, even in crowded places. It is hence necessary to monitor human activities for public safety. Surveillance cameras can monitor surrounding activities but require human assistance to continuously monitor every incident. Automatic violence detection is needed for early warning and fast response. However, such automation is still challenging because of low video resolution and blind spots. This paper uses ResNet50v2 and the gated recurrent unit (GRU) algorithm to detect violence in the Movies, Hockey, and Crowd video datasets. Spatial features were extracted from each frame sequence of the video using a pretrained model from ResNet50V2, which was then classified using the optimal trained model on the GRU architecture. The experimental results were then compared with wavelet feature extraction methods and classification models, such as the convolutional neural network and long short-term memory. The results show that the proposed combination of ResNet50V2 and GRU is robust and delivers the best performance in terms of accuracy, recall, precision, and F1-score. The use of ResNet50V2 for feature extraction can improve model performance.

• 한국전자통신학회논문지
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• 제8권8호
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• pp.1143-1148
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• 2013

본 논문에서는 가정용 계량기의 데이터를 PC로 모니터링할 수 있도록, 전력선 통신(PLC : Power Line Communication) 모뎀과 데이터 수집 장치 (DCU : Data Concentrator Unit)를 적용한 시스템을 구현하였다. 전력선 통신 모뎀은 기존의 전력선에 데이터를 실어 보내는 기술로 별도의 신호선 설치에 대한 부담을 개선한다. 본 시스템은 가정용 계량기의 데이터를 수집하여, 각 가정의 전, 현 월 사용 전력량을 서버용 PC로 확인하여 요금 관리, 고장 관리를 편리하도록 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
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• pp.380-382
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• 2007

As the society changes more to the aging society in future, many healthcare product are developed and distributed more on the market. The digital wrist band tye blood pressure device for home use are popular already in the market. It is useful for checking blood pressure level at home and control of hypertension. Especially. It is very essential home device to check the health condition of blood circulation disease. Nowadays many product types are available. But the measurement accuracy of blood pressure is not enough compared to the mechanical type. It needs to be upgraded to assure the precise health data enough to use in the hospital. The structure, feature and output signal of capacitor type pressure sensors are analyzed. An improved design fa capacitor sensor is suggested. It shows more precise health data after use on a wrist band type health unit. They can be applied for remote u-health medical service.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 춘계학술대회
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• pp.353-357
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• 1997

We have developed a prototype of a module-based patient monitor. In this paper, we describe the design methodology and specifications of the developed module-based patient monitors. The monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases, each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and $SpO_2$ with plethysmograph.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.68-73
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• 2002

In standard teletherapy, a treatment plan is generated with the aid of a treatment planning system, but it is common to perform an independent monitor unit verification calculation (MUVC). In exact analogy, we propose and demonstrate that a simple and accurate MUVC in Intensity Modulated Radiotherapy (IMRT) is possible. We introduce a concept of Modified Clarkson Integration (MCI). In MCI, we exploit the rotational symmetry of scattering to simplify the dose calculation. For dose calculation along a central axis (CAX), we first replace the incident IMRT fluence by an azimuthally averaged fluence. Second, the Clarkson Integration is carried over annular sectors instead of over pie sectors. We wrote a computer code, implementing the MCI technique, in order to perform a MUVC for IMRT purposes. We applied the code to IMRT plans generated by CORVUS. The input to the code consists of CORVUS plan data (e.g., DMLC files, jaw settings, MU for each IMRT field, depth to isocenter for each IMRT field), and the output is dose contribution by individual IMRT field to the isocenter. The code uses measured beam data for Sc, Sp, TPR, (D/Mu)$\_$ref/ and includes effects from MLC transmission, and radiation field offset. On a 266 MHZ desktop computer, the code takes less than 15 sec to calculate a dose. The doses calculated with MCI algorithm agreed within +/- 3% with the doses calculated by CORVUS, which uses a 1cm x 1cm pencil beam in dose calculation. In the present version of MCI, skin contour variations and inhomogeneities were neglected.

• 한국정보통신학회논문지
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• 제13권6호
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• pp.1128-1140
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• 2009

본 논문에서는 TMO 실시간 객체 모델을 이용하여 실시간 통신 메시지 서비스를 효과적으로 지원하기 위해 중환자의 실시간 생체정보 전송 시스템을 나타내었다. 또한 분산된 네트워크 시스템에서 TMO 구조를 이용하여 ICU(intensive care unit) 응용 환경에 적용함으로서 실시간 메시지 서비스를 보장하였다. TMO를 이용한 생체정보 파싱 수신 모듈은 ICU의 Central Monitor로부터 수신할 수 있는 Raw Data 형태의 환자의 생체 정보를 생체 정보 웹 뷰어 시스템에서 사용가능한 데이터로 분석할 수 있도록 설계하였다. 실시간 뷰어 시스템은 환자 생체정보에 대한 실시간성과 생체 정보에 대한 데이터의 연속성을 부여하여 베드 사이트의 환자에게서 발생된 모든 생체정보에 의해 환자 관리를 데이터베이스를 이용하여 전산화함으로써 환자의 광범위한 자료 검색이 이루어지므로 원격진료로 활용이 가능하다. TMO 객체 모델을 기반으로 한 실시간 시뮬레이션에서 몇 가지의 TMO 구조의 장점을 가지고 있으며, TMO 객체 모델은 요구 명세서와 설계 사이의 강력한 연관성을 가지고 있다.

• 제어로봇시스템학회논문지
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• 제19권6호
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• pp.520-526
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• 2013

This study presents the unit control of a PC (Personal Computer) program using multiple smartphones based on ad hoc communication. A design of the data packet that multiple smartphones send to a computer, and a framework that manages and controls the unit in a computer after analyzing the data packet, are proposed. As a result, multiple users are able to control their own units using their smartphones while seeing the monitor connected to a computer. In other words, multiple users can share the same game in a computer or control their units embedded in a system using their smartphones. An experimental result shows that a racing game in a PC can be realized by the proposed communication interface, where four iPhones are used to control their units in a computer. Thus, the proposed framework can be effectively used for unit control in a PC using multiple smartphones.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.195-197
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• 2006

In this paper, an interface unit is designed to efficiently monitor transmission data in Controller Area Network(CAN)-based control systems. The CAN uses a serial multi master communication protocol that efficiently supports distributed real-time control with a very high level of data integrity, and communication speeds of up to 1Mbps. The interface unit is composed of a DSP controller which collects data on the CAN bus and transfers data to a personal computer via serial communication to save and display of interesting signals. The experimental system consists of three DSP controllers which represent electronic control units of a vehicle, an interface unit for analysing the data on the bus, and a graphic monitoring program coded on the Windows platform. The validity and the effectiveness of the proposed simple type of CAN interface unit are shown through the experimental results.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2019년도 추계학술발표대회
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• pp.24-27
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• 2019

Meltdown, Spectre 등 하드웨어의 취약점을 이용하는 side-channel 공격이 주목을 받으면서 주요 microarchitecture 구조에 대한 철저한 이해의 필요성이 커지고 있다. 현대 마이크로프로세서에서 branch prediction이 갖는 중요성에도 불구하고 세부적인 사항은 거의 알려지지 않았으며 잠재적 공격에 대비하기 위해서는 반드시 현재 드러난 정보 이상의 detail을 탐구하기 위한 시도가 필요하다. 본 연구에서는 Performance Monitor Counter를 이용해 branch 명령어를 포함한 프로그램이 실행되는 동안 Branch Prediction Unit에 의한 misprediction 이벤트가 발생하는 횟수를 체크하여 인텔 하스웰, 스카이레이크에서 사용되는 branch target buffer의 구조를 파악하기 위한 실험을 수행하였다. 연구를 통해 해당 프로세서의 BTB의 size, number of way를 추정할 수 있었다.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.975-983
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• 2022

This paper presents an innovative way of integrating scheduling and project controls with the environmental impact of a construction project to track, monitor, and manage environmental emissions at the activity level. As a starting point, scheduling and project controls help monitor the status of a project to provide an assessment of the duration and sequence of activities. Additionally, project schedules can also reflect resource allocation and costs associated with various phases of a construction project. Owners, contractors and construction managers closely monitor tasks or activities on the critical path(s) and/or longest path(s) calculated through network based scheduling techniques. However, existing industry practices do not take into account environmental impact associated with each activity during the life cycle of a project. Although the environmental impact of a project may be tracked in various ways, that tracking is not tied to the project schedule and, as such, generally is not updated when schedules are revised. In this research, a Cradle to Gate approach is used to estimate environmental emissions associated with each activity of a sample project schedule. The research group has also investigated the potential determination of scenarios of lowest environmental emissions, just as project managers currently determine scenarios with lowest cost or time. This methodology can be scaled up for future work to develop a library of unit emissions associated with commonly used construction materials and equipment. This will be helpful for project owners, contractors, and construction managers to monitor, manage, and reduce the carbon footprint associated with various projects.