• 한국항공운항학회지
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• 제26권1호
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• pp.10-24
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• 2018

This paper tried to analyze the response of air traffic controller(ATC) against abnormal situations using survey based on cognitive strategies suggested by Malakis et al.(2010). The survey designed to empirically analyze the effect of the cognitive strategy factors on organizational effectiveness. The main purpose of this research was as follows: First, it was analyzed both the individual-scale and team-scale factors which constructed the cognitive strategy against abnormal situations. Secondly, how seriously impact the ATC's cognitive strategies on their organizational effectiveness. The organizational effectiveness was divided into such two latent variables as job absorption and job satisfaction. According to the a analysis, it was proven that premeditated act of ATC had a positive significant effect on team-scale cognitive strategies such as teamwork, communication and error management. Moreover, it was found out the team-scale cognitive strategies had also a positive significant effect on job absorption. On the other hands, individual-scale cognitive strategies had no or negative effect on job absorption. Job absorption was proven to have a significant effect on job satisfaction of ATC.

• 한국방재학회 논문집
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• 제8권5호
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• pp.93-102
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• 2008

자원봉사자 활동을 분석하여 자원봉사활동체계를 정비하는데 기여코자 하였는데, 주요 정책적 제언은 다음과 같다. 관리체계에서는 민관산학의 통합적 협력체계, 구호품관리체계 개선, 봉사활동 운영 매뉴얼 개발의 필요성 등을 제언하였다. 그리고 교육체계에서는 재난분야별 전문교육, 현장 오리엔테이션교육, 자원봉사자관리자 양성교육 등의 필요성을 설명하였다. 지원체계에 대해서는 국가안전관리정보시스템, 봉사자관리전산프로그램, 봉사자 상해보험, 봉사활동 시간확인서 발급, 봉사활동 행정지원, 비상통신체계 확보 그리고 예방 예산 및 의연금 등에 대한 개선을 제시하였다.

• International Journal of Aeronautical and Space Sciences
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• 제17권1호
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• pp.89-100
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• 2016

Given the unpredictability of the space environment, satellite communications are manually performed by exchanging telecommands and telemetry. Ground support for orbiting satellites is given only during limited periods of ground antenna visibility, which can result in conflicts when multiple satellites are present. This problem can be regarded as a scheduling problem of allocating antenna support (task) to limited visibility (resource). To mitigate unforeseen errors and costs associated with manual scheduling and mission planning, we propose a novel method based on a genetic algorithm to solve the ground support problem of multiple satellites and antennae with visibility conflicts. Numerous scheduling parameters, including user priority, emergency, profit, contact interval, support time, remaining resource, are considered to provide maximum benefit to users and real applications. The modeling and formulae are developed in accordance with the characteristics of satellite communication. To validate the proposed algorithm, 20 satellites and 3 ground antennae in the Korean peninsula are assumed and modeled using the satellite tool kit (STK). The proposed algorithm is applied to two operation modes: (i) telemetry, tracking, and command and (ii) payload. The results of the present study show near-optimal scheduling in both operation modes and demonstrate the applicability of the proposed algorithm to actual mission control systems.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.564-566
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• 2005

The relation between HPA (High Power Amplifier) and COMS (Communication Ocean Meteorological Satellite) multi-carrier is analyzed in this paper. MODAC (Meteorological and Ocean Data Application Center) has a primary mission to transmit processed data, HRIT (High Rate Information Transmission) and LRIT (Low Rate Information Transmission), which is normalized and calibrated by pre-processing. It is also replaced with the SOC (Satellite Operation Center) in emergency case and can transmit the command and ranging tones for operation of COMS. From the result of simulation with modelled HPA, it is found that the multi-carrier in one HPA can give rise to an inter-modulation which makes harmonic and spurious elements increase in-band. Under the environment of these increased parasitic elements, the degradation of multi-carrier's quality is estimated from the ratio of the amount of noise to total output power of HPA.

• 한국컴퓨터산업학회논문지
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• 제2권12호
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• pp.1517-1522
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• 2001

기존의 전력 시스템 보호 장치는 아날로그 방식으로 고성능, 고기능화를 지향하는 전력 설비의 장치로는 동자의 신뢰도를 높일 수 없으며, 또한 배전용 전력 시스템의 중앙감시 및 제어 장치로 표준화시키지 못한 문제점이 있다. 수배전 보호장치와 비상용 발전 설비의 제어장치를 디지털 방식으로 전환시켜 집약적이고, 고성능의 전력 시스템 감시 및 제어 기능을 갖도록 한다. 전력 시스템의 동작 및 상태(전압, 전류, 전력, 위상 및 주파수)를 실시간 디지털 방식으로 계측하고 통신방식을 사용하여 감시하고 제어하는 통합 중앙 감시 및 제어장치 개발을 목적으로 한다. 이러한 전력 감시 설비를 마이컴 방식［1,2］을 채택하여 디지털 제어가 가능하며 집약적이고 고성능의 감시 및 제어기능［3］을 갖도록 하였다.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제11권1호
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• pp.84-88
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• 2008

여러 개의 자석을 삼킨 경우 자석들이 서로 잡아당겨 압력 괴사로 인한 장폐쇄, 장천공, 누공 형성 등의 합병증을 일으킬 수 있다. 따라서 영 유아나 정신과적인 문제가 있는 큰 아이의 경우 자석이나 자석이 포함된 장난감과 같은 물건들을 멀리하고, 자석을 삼킨 경우에는 즉시 확인해 보아야 한다. 저자들은 1년 전부터 주기성 구토를 호소했던 중등도 정신지체를 가진 12세 남아에서 삼킨 장난감 자석 4개로 인해 위-십이지장 누공을 형성하였고 수술 후 호전된 1예를 치험하였기에 보고하는 바이다.

• 대한의용생체공학회:의공학회지
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• 제26권5호
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• pp.331-335
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• 2005

The fusion technology of small sensor and wireless communication was followed by various application examples of the embedded system, where the social infrastructural facilities and ecological environment were wirelessly monitored. In addition, this technology represents the primary application area being extended into the healthcare field. In this study, a body area network for ubiquitous healthcare is presented. More specifically this represents a wireless biomedical signal acquisition device characterized by small size, low power consumption, pre-processing and archiving capability. Using this device, a new method for monitoring vital signs and activity is created. A PDA-based wireless sensor network enables patients to be monitored during their daily living, without any constraints. Therefore, the proposed method can be used to develop Activities of Daily Living (ADL) monitoring devices for the elderly or movement impaired people. A medical center would be able to remotely monitor the current state of elderly people and support first-aid in emergency cases. In addition, this method will reduce medical costs in society, where the average life expectancy is increasing.

• 제어로봇시스템학회논문지
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• 제14권7호
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• pp.720-725
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• 2008

This paper proposes a system architecture for USN with a service robot to provide more active assisted living services for elderly persons by monitoring their mental and physical well-being with USN environments at home, hospital, or silver town. Sensors embedded in USN are used to detect preventive measures for chronic disease. Logged data are transferred to main controller of a service robot via wireless channel in which the analysis of data is performed. For the purpose of handling emergency situations, it needs real-time processing on gathering variety sensor data, routing algorithms for sensor nodes to a moving sink node and processing of logged data. This paper realized multi-hop sensor network to detect user movements with biometric data transmission and performed algorithms on Xenomai, a real-time embedded Linux. To leverage active sensing, a mobile robot is used of which task was implemented with a priority to process urgent data came from the sink-node. This software architecture is anticipated to integrate sensing, communication and computing with real-time manner. In order to verify the usefulness of a proposed system, the performance of data transferring and processing on a real-time OS with non real-time OS is also evaluated.

• 전자공학회논문지 IE
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• 제49권2호
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• pp.82-88
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• 2012

본 논문에서는 안드로이드 기반의 모바일 플랫폼을 이용한 통합형 유헬스케어 시스템 설계하여 개인의 건강관리 서비스를 위한 시스템을 제안하였다. 통합형 생체 계측 시스템은 심전도, 산소포화도, 혈압, 호흡, 체온 등 모듈을 통하여 생체 신호를 계측하고 신호처리된 생체 정보를 무선 통신모듈을 이용하여 안드로이드 기반의 모바일 플랫폼 게이트웨이로 전송한다. 전송된 생체 데이터는 모바일 시스템에서 건강상태를 감시하거나 유헬스케어 서버로 전송하도로 설계하였다. 생체신호 감시 시스템을 구현함으로서 측정되어진 생체 데이터를 모니터링하여 현재의 건강상태를 확인할 수 있었으며 보호자의 이동성을 보장할 수 있는 장점을 보였다. 이와 같은 시스템은 개인 건강관리 및 응급환자 감시 시스템을 위한 유헬스케어 시스템 발전에 도움이 되리라 본다.

• Journal of Preventive Medicine and Public Health
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• 제48권6호
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• pp.265-270
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• 2015

The recent Middle East respiratory syndrome coronavirus (MERS-CoV) outbreak has originated from a failure in the national quarantine system in the Republic of Korea as most basic role of protecting the safety and lives of its citizens. Furthermore, a number of the Korean healthcare system's weaknesses seem to have been completely exposed. The MERS-CoV outbreak can be considered a typical public health crisis in that the public was not only greatly terrorized by the actual fear of the disease, but also experienced a great impact to their daily lives, all in a short period of time. Preparedness for and an appropriate response to a public health crisis require comprehensive systematic public healthcare measures to address risks comprehensively with an all-hazards approach. Consequently, discussion regarding establishment of post-MERS-CoV improvement measures must focus on the total reform of the national quarantine system and strengthening of the public health infrastructure. In addition, the Korea Centers for Disease Control and Prevention must implement specific strategies of action including taking on the role of "control tower" in a public health emergency, training of Field Epidemic Intelligence Service officers, establishment of collaborative governance between central and local governments for infection prevention and control, strengthening the roles and capabilities of community-based public hospitals, and development of nationwide crisis communication methods.