• Journal of Trauma and Injury
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• v.34 no.2
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• pp.87-97
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• 2021

Purpose: This study examined emergency medical service (EMS) transportation patterns for adult trauma patients before and after establishing a level 1 regional trauma center (RTC) and to evaluate the transportation approach after prehospital severity screening. Methods: This was a retrospective observational study of trauma patients aged ≥18 years admitted via EMS to the emergency department or a level 1 RTC, 1 year before to 3 years after RTC establishment. Patients with an Injury Severity Score (ISS) in the patient registration system were selected. Analyses were performed to determine transportation pattern changes by comparing patients pre- and post-RTC establishment and by yearly comparisons over the 4-year study period using the Mann-Whitney U test and chi-square test. Results: Overall, 3,587 patients were included. The mean ISS was higher in the post-RTC group (n=2,693; 10.63±8.90, median 9.00) than in the pre-RTC group (n=894; 9.44±8.20, median 8.00; p<0.001). The mean transportation distance (9.84±13.71, median 5.80 vs. 13.12±16.15 km, median 6.00; p<0.001) was longer in the post-RTC group than in the pre-RTC group. Furthermore, proportionally fewer patients were transported from an area in the same city as the RTC after establishment (86.1% vs. 78.3%; p<0.001). Yearly comparisons revealed a gradually increasing trend in the hospital death rate (ptrend=0.031). Conclusions: After establishing a level 1 RTC, the EMS transportation of severe trauma patients increased gradually along with the long-distance transportation of minor trauma patients. Therefore, improved prehospital EMS trauma severity assessments and level 1 RTC involvement in patient classification in the prehospital phase are necessary.

• KIISE Transactions on Computing Practices
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• v.23 no.4
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• pp.238-243
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• 2017

This paper presents a study regarding a systemic structure that forms a link between heterogeneous terminals and the WebRTC (Web real-time communication) based video-conferencing systems. This system consists of a WebRTC-based terminal, a signal server for the relaying of the necessary signals for media negotiations, an MCU provides an interworking interface for the heterogeneous terminal, and the heterogeneous terminals that interwork with the MCU. This technology enables the interoperability between the WebRTC-based video-conferencing solutions and the legacy devices. In addition to reducing the replacement costs regarding new-technology-based solutions, the existing legacy equipment enables the use of multiparty-conference, thereby increasing the use ability of the conferencing systems.

• Journal of Korean Society of Water and Wastewater
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• v.27 no.5
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• pp.649-659
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• 2013

Real time control (RTC) can be broadly defined as a system that dynamically adjusts the operation of facilities in response to online measurements in the field to maintain and meet the operational objectives, both during dry and wet weather conditions. RTC adds a dynamic component that is actively adjusted in real time based on system conditions. In terms of reducing or eliminating sewer flooding, CSOs and/or managing flows, implementation of RTC has various benefits to sewer system operation. It has been emerging as an attractive approach, but related elements (such as framework for the application, its components and equipments, aspects to be considered) towards its application on sewer systems have not been throughly introduced so far. The main goal of this study is to review several applications of RTC and firm guidelines published abroad, and finally to provide a framework for the proper application of RTC on sewer systems.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.209-210
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• 2016

본 논문은 WebRTC를 통해 웹 브라우저 안에서 플러그인의 도움 없이 peer-to-peer로 실시간 화상회의 서비스를 구현하였다. 영상, 음성과 채팅 서비스를 지원하며 WebRTC, Javascript, HTML, Node.js, CSS 기반으로 구현하였다. 시그널링 관련 STUN과 TURN 서버의 사용을 위해서는 ICE 프레임워크를 사용하였다. PC와 스마트폰에서의 일 대 일 화상회의 서비스의 작동 결과를 확인하였다.

• The Journal of Korea Robotics Society
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• v.4 no.1
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• pp.17-24
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• 2009

This work deals with an intuitive method for a planar biped to walk, which is named Relative Trajectory Control (RTC) method. A key feature of the proposed RTC method is that feet of the robot are controlled to track a given trajectory, which is specially designed relative to the base body of the robot. The trajectory of feet is presumed from analysis of the walking motion of a human being. A simple method to maintain a stable posture while the robot is walking is also introduced in RTC method. In this work, the biped is modeled as a free-floating robot, of which dynamic model is obtained in the Cartesian space. Using the obtained dynamic model, the robot is controlled by a model-based feedback control scheme. The author shows a preliminary experimental result to verify that the biped robot with RTC method can walk on the even or uneven surfaces.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.101-103
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• 2022

본 논문에서는 오프라인 컨퍼런스의 한계점인 접근성 문제와 온라인 컨퍼런스의 한계점인 참여자간 상호 소통과 네트워킹 문제점을 해결하기 위한 솔루션으로 WebRTC 기반 메타버스 컨퍼런스 시스템을 제안한다. 해당 솔루션은 WebRTC를 활용한 실시간 화상채팅 및 멀티접속을 구현하고 WebVR을 기반으로 하는 A-Frame 프레임워크를 활용하여 메타버스 컨퍼런스 시스템을 구현하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1375-1378
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• 2005

향후 국내에서 개발되는 저궤도 관측위성의 고성능 탑재컴퓨터로 유럽에서 자체적으로 개발하여 위성용으로 활용하고 있는 MCM-ERC32 를 사용할 예정이다. MCM-ERC32 는 크게 32-비트 ERC32SC 프로세서와 프로세서의 기능을 보완하고 추가적인 기능들을 제공하기 위해 제작된 ASIC인 VASI(Very Advanced Sparc Interface), 그리고 메모리(SRAM, DRAM, EEPROM, etc.)로 구성되어 있다. 위성의 탑재소프트웨어를 설계 및 개발하는데 있어서 가장 기본적으로 요구되는 기능이 타이머이다. 탑재소프트웨어는 타이머를 통하여 태스크들의 관리와 스케쥴링 등을 수행하게 된다. 위성과 같이 높은 정확도가 요구되는 실시간 임베디드 시스템에서는 타이머의 구현이 매우 중요하다. ERC32SC 프로세서 자체에서도 RTC, GPT(General Purpose Timer), WDT(Watchdog Timer)와 같은 기본적인 타이머 기능을 제공하지만 VASI 에서도 클락과 사이클이라는 개념을 이용한 RTC 를 제공한다. 어느 타이머를 사용하는가는 전적으로 개발자의 선택이다. ERC32SC 프로세서에서 제공하는 타이머는 상용의 임베디드 시스템에서 제공하는 기능과 동일하다. 본 논문에서는 위성탑재소프트웨어 개발에 필요한 RTC 를 설계하기 위한 MCM-ERC32 에서 제공하는 VASI RTC 의 구조와 기능에 대하여 소개하고자 한다.

• The KIPS Transactions:PartC
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• v.12C no.4 s.100
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• pp.589-596
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• 2005

The objective of this paper lies in the design and implementation of a home gateway supporting live video streaming which flows from the Non-SIP video camera in home to the mobile SIP device outside. We developed the home gateway on the OSGi framework and employed the RTC technology which embeds an SIP stack so that the multimedia session can be established from the home device to the mobile user outside. And also we developed an RTC bundle to manage the session and a virtual capture device driver to read the video stream from the Non-SIP video camera in the home network, and installed them on the home gateway. Finally, we constructed the experimental environment that has the windows messenger as the SIP mobile device and an AXIS 2100 UPnP video camera as a video source, and then tested if the session establishment to the mobile user from the camera and live video streaming work well between them.

• Journal of the Korean Institute of Telematics and Electronics T
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• v.36T no.4
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• pp.115-122
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• 1999

The Y2K bug, what is called "millennium bug" or "2000 year bug", take place because the year after 2000 year is not recognize as the year marking method of the computer designed for take up two-digit number. This takes place because the RTC chip architecture of PC can not change the century information to the operating together with date. In this paper, we make an analysis about Y2K hardware bug of RTC in the IBM compatible PC, and make a Y2K compensation board in order to solve Y2K hardware bug. And the test results by various Y2K diagnosis program is bug before put in Y2K compensation board, but is not bug after put in Y2K compensation board. Therefore, we suggest a solution method for Y2K hardware bug of RTC in the IBM compatible PC.

• Journal of Advanced Navigation Technology
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• v.27 no.1
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• pp.139-145
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• 2023

When a doctor examines a patient in a hospital, the doctor directly checks the patient's condition and conducts a face-to-face diagnosis through dialogue with the patient. However, it is often difficult for doctors to directly treat patients. Recently, several types of telemedicine systems have been developed. However, the systems have lack of capabilities to observe heart disease, neck condition, skin condition, inside ear condition, etc. To solve this problem, in this paper, an interactive telemedicine robot system with autonomous driving in a room capable of visual examination and auscultation of patients is developed. The developed robot can be controlled remotely through the WebRTC platform to move toward the patient and check a patient's condition under the doctor's observation using the multi-joint robot arm. The video information, audio information, patient's heart sound, and other data obtained remotely from patients can be transmitted to a doctor through the web RTC platform. The developed system can be applied to the various places where doctors are not possible to attend.