• 한국응급구조학회지
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• 제24권2호
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• pp.79-88
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• 2020

Purpose: The study aimed to collect the first aid activity log data of patients who were retransferred through paramedics and to analyze the data in the hospital to improve the plan. Methods: We analyzed 434 retransferred patients, out of the 18,197 patients who visited the emergency medical center in the C area in G metropolitan city, from January 2017 through December 2018. The collected data were analyzed using the SPSS software. Results: The patients were retransferred for various reasons: 17.7% (77 cases) due to the absence of specialists, 15.0% (65 cases) required first aid, and 5.3% (23 cases) due to absence of medical department. In addition, the major medical department with the largest number of retransfer was the department of emergency medicine with 38.2% (166 cases). In the prehospital stage, 38.5% (167 cases) were classified as severe, but in the hospital stage, they were classified as mild. In addition, as a result of hospitalization and discharge, 60.4% (262 cases) were discharged. Conclusion: Most of the retransferred patients were non-emergency patients, and were discharged for mild conditions. The overcrowding in the emergency room of a tertiary hospital can be prevented by reducing the retransmission.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(3)
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• pp.97-100
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• 2000

As network resources have become faster and demands for multimedia service through network have increased, the demand for Media server system has increased. These kinds of media server solve their bottle neck problem of internal storage device by using parallel system which takes advantage of fast network resource. Many vendors have suggested each of their media server system to solve these problem radically, but most of them require major modification of infra component and additional drawback has added. For example, storage mechanism for specific media requires new file system which is totally different from traditional one, and algorithm for enhancing performance may not suit for traditional operating system environment. In this paper, we designed a parallel media server based on web interface of traditional system and implemented a program for media server. Implemented server system performs parallel processing through web interface without any modification of traditional system, and controls which is related to merging load by distributed data is charged only to client and control server and consequently load of storage server can be minimized. And also, data transfer protocol for streaming media includes Retransfer algorithm and client Admission control policy relevant to performance of whole system.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제4권4호
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• pp.135-140
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• 2015

WDSS는 네트워크 연동구간을 이용한 DDoS 대피소 시스템에 L7 스위치와 웹캐시서버를 추가 구성하여 웹 응용계층 DDoS 공격에 대한 방어성능을 향상시킨 시스템이다. WDSS는 웹 DDoS 공격 발생 시 백본 네트워크로부터 트래픽을 우회한 뒤 비정상 요청은 DDoS 차단시스템과 L7 스위치에서 차단하고 정상적인 클라이언트의 요청에 대해서만 웹캐시서버가 응답하게 함으로써 소규모 트래픽 기반의 세션 고갈형 DDoS 공격에 대응하고 정상적인 웹서비스를 유지한다. 또한 정상 트래픽을 웹서버로 재전송하기 위한 IP 터널링 설정이 없이도 공격 대응이 가능하다. 본 논문은 WDSS를 국내 ISP 백본 네트워크상에 구축하여 시스템 작동에 대한 유효성과 웹 응용계층 DDoS 공격 방어성능을 검증한 결과를 다룬다. 웹 DDoS 방어성능 평가는 실제 봇넷과 동일한 공격 종류와 패킷수의 공격을 수행할 수 있는 좀비 PC로 구성한 DDoS 모의테스트 시스템을 이용하여 실시하였다. 웹 응용계층 DDoS 공격 종류와 강도를 달리하여 WDSS의 웹 DDoS 방어성능을 분석한 결과 기존의 DDoS 대피소 시스템에서 탐지/방어하지 못한 소규모 트래픽에 기반하며 동일 플로우를 반복적으로 발생하지 않는 웹 DDoS 공격을 탐지/방어할 수 있었다.

• Clinical and Experimental Reproductive Medicine
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• 제43권2호
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• pp.133-138
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• 2016

Objective: To determine the incidence of embryo retention (ER) in the transfer catheter following embryo transfer (ET) in blastocyst transfer and investigate whether retransferring retained embryos has an impact on reproductive outcomes in patients undergoing in vitro fertilization-ET. Methods: We retrospectively analyzed the records of 1,131 blastocyst transfers, which comprised 223 single blastocyst transfer (SBT) and 908 double blastocyst transfer (DBT) cycles. Each SBT and DBT group was classified depending on whether ET was performed without retained embryos in the catheter during the first attempt (without-ER group) or whether any retained embryos were found following ET (ER group) for the purpose of comparing reproductive outcomes in a homogenous population. Results: The overall incidence of finding retained embryos was 2.8% (32/1,131). There were no retained embryos in SBT cycles. In DBT cycles, implantation rates (30.0% vs. 26.6%), positive ${\beta}-hCG$ rates (57.2% vs. 56.2%), clinical pregnancy rates (45.3% vs. 46.9%), and live birth rates (38.9% vs. 43.8%) were not significantly different between the without-ER and ER groups. There were no significant differences in the mean birth weight (g) $2,928.4{\pm}631.8$ vs. $2,948.7{\pm}497.8$ and the mean gestational age at birth ($269.3{\pm}17.2days$ vs. $264.2{\pm}25.7days$). A total of nine cases of congenital birth defects were found in this study population. Eight were observed in the without-ER group and one in the ER group. Conclusion: Our results suggest that retransfer of retained embryos does not have any adverse impact on reproductive outcomes in blastocyst transfer cycles. Furthermore, our results support finding that SBT might be advantageous for decreasing the incidence of retained embryos in catheters.

• 한국재난정보학회 논문집
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• 제18권4호
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• pp.839-846
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• 2022

연구목적:감염병 유행시 감염병 의심 환자의 구급활동을 위해 출동한 소방대원의 안전을 확보하고, 현장에서 수집된 정보를 바탕으로 지역별 감염병 의심환자 발생 현황을 파악하여 현장 통제 및 지원이 가능한 소방 감염병 관리 시스템을 개발하고자 한다. 연구방법: 감염병 의심 환자를 분류할 수 있는 스마트폰 앱을 개발하여 감염병 의심 여부를 확인하고, 감염병 의심 환자로부터 감염을 방지하기 위해 환자 식별용 NFC 태그를 1회용 형태로 개발한다. 현장에서 입력되는 감염병 의심 응급환자 관련 데이터를 수집하고 분석할 수 있는 관리 시스템을 개발하여 해당 업무 관련자에게 제공하여 감염병 의심 응급환자의 이송을 개선하는지 평가한다. 연구결과: 실험결과 스마트폰 앱에 구현된 알고리듬을 통해 감염병 의심 여부를 판단할 수 있었으며, 적정 이송병원으로 이송함으로써 재이송 비율히 현저히 감소되었다. 결론:본 연구를 통해 응급의료 서비스에 ICT 기술을 적용하여 응급의료 서비스를 개선할 수 있는 가능성을 확인하였으며, 특히 감염병 의심환자에 대한 적정병원 이송으로 이송시간 단축 및 응급환자의 소생률 향상과 함께 구급대원의 안전을 적극적으로 확보할 수 있을 것으로 기대된다.