• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 추계학술대회 논문집
• /
• pp.325-330
• /
• 2008

LRT System Application Project is performed for the purpose of technical advancement and stabilization of K-AGT system from the viewpoint of practical use and commercialization. For those purpose, the performance test and evaluation procedure for K-AGT signaling system are developed, and the scheme of verifying the performance and function of signaling system under multi-train and driverless control environment is being conducted. For the multi-train operation in K-AGT test track, we applied the regenerative energy storage system in addition to the existing electric facilities. This paper present the design, manufacturing, and testing results of regenerative energy storage system.

• 디지털산업정보학회논문지
• /
• 제17권3호
• /
• pp.17-26
• /
• 2021

Internet of Things is an infrastructure of the interconnected devices. In Internet of Things environment, many smart devices are used in daily life. It requires a new retrieval method using multiple devices. We propose an information retrieval method using both device characteristics and device usage characteristics in multi-device environments. Firstly, information retrieval is performed using a general purpose device. And then, it is performed using dedicated devices. Our method uses both characteristics of the devices and usage characteristics of them. Moreover, it considers queries on the general purpose device. This paper proposes a new retrieval method and describes algorithms. Then, it presents smart home scenarios. Performance evaluation is performed using the scenarios. The evaluation results show higher precision and efficiency than previous researches. The proposed method gets information more accurately and quickly in IOT multiple device environments.

• 항공우주시스템공학회지
• /
• 제15권6호
• /
• pp.72-77
• /
• 2021

This paper proposes a design and development plan for a control program for the MX-10 EO/IR camera. This camera is a piece of mission equipment mounted on the multi-purpose unmanned helicopter (MPUH) system. Operators must be able to control the necessary functions of the camera to perform their assigned tasks. To achieve this, the function to control the camera was analyzed, and a control program was developed. In addition, the control program was linked to a joystick for convenient operation of the camera by the operator.

• 시스템엔지니어링학술지
• /
• 제15권1호
• /
• pp.9-15
• /
• 2019

DIRCM is a device that deception missiles by directing the light source to missile seeker with infra-red laser based turret. The effectiveness of the device is affected by changes of the turret's Field of View (FoV), and also influence of the interference devices determines the effect of the DIRCM's effectiveness. Therefore finding mounting location for DIRCM is critical parameter for the DIRCM's effectiveness. so we applied stiffness review, interference analysis, FoV analysis and simulation analysis method to Multi-purpose helicopter for the find DIRCM location. As a result, in case of 1 DIRCM mounted at helicopters bottom shows 30~40% survivability. case of 2 DIRCM mounted at both side shows 70~80% survivability.

• 한국전자통신학회논문지
• /
• 제16권1호
• /
• pp.145-150
• /
• 2021

최근 드론에 대한 관심이 많아지고 드론의 이용이 급증하면서 드론을 배우려는 사람들이 증가하고 있다. 하지만 드론은 조작이 어려우며 재대로 배우지 않는다면 사고가 발생하기 쉽고 드론이 파손되는 경우도 빈번하게 일어나고 있다. 본 연구에서는 드론을 안전바에 결속하여 안전사고와 드론의 파손을 방지하고 블록을 통해 센서 및 제어기기를 확장할 수 있는 다목적 드론을 구현하였다.

• 드라이브 ㆍ 컨트롤
• /
• 제17권4호
• /
• pp.1-7
• /
• 2020

In orchard or crop-growing environments, pesticides are sprayed using various nozzles to prevent pests and improve productivity. Nozzles currently in use are restricted for use in multi-purpose environments, thus, it is necessary to develop new nozzles. In this study, new two-phase nozzles are proposed to improve the performance of the nozzle (flow rate, spray angle, spray particle size). The performance of the two-phase nozzles are predicted through the CFD analysis and the performance of the nozzles is compared with the experiment. The experimental results showed that the proposed two-phase nozzles are available at relatively low operating pressure condition and are capable of extensive spray particle size control. Thus, the proposed nozzles are expected to be available in various orchard environments.

• 시스템엔지니어링학술지
• /
• 제18권1호
• /
• pp.14-32
• /
• 2022

In this paper, we report the results of a conceptual study to develop of a multi-purpose medium-sized UAV that can safely perform missions in harsh maritime environments. In this study, we focused on developing UAVs capable of performing three maritime missions that urgently require the application of medium-sized UAVs: marine ecosystem management, ocean surveillance system, and response to marine accidents. Furthermore improvement points for the above three naval missions using medium-sized UAVs were derived in preparation for the problems of the existing mission performance. Finally, by developing and analyzing the utilization scenario of the medium-class UAV, the required performance suitable for each mission was defined and assigned to the related mission equipment, A new maritime management plan was proposed using the medium-class UAV system equipped with replaceable mission equipment.

• 한국정보전자통신기술학회논문지
• /
• 제9권2호
• /
• pp.213-222
• /
• 2016

본 연구는 정책의제형성이 외부집단에 의해 형성된 정책이라기 보다는 정치의 흐름중에서 정부와 여당의 역할이 크게 기여했다는 점과 국내외의 국민을 대표하는 상징적인 정책이라는 점이다. 특히 이주노동자와 결혼이주여성 정책은 글로벌 시대에 해결해야할 중요한 정책이라는 점과 정부가 추진하는 '결혼이주여성 정책'의 결정과정을 살펴봄으로써 정책에 결정적으로 영향을 미친 요인을 확인하기 위한 좋은 사례이기 때문이다. 이러한 연구목적을 달성하기 위한 구체적인 방안은 다음과 같다. 한국 다문화정책에 대한 이론적 논의를 진행하고, 다문화 정책이 형성되는 과정을 논의한다. 진행 단계에서는 다문화담론의 형성과정과 다문화담론이 다양하게 이루어지는 분화과정, 그리고 부문별로 이루어지던 다문화담론의 정책화되는 과정이다.

• 정보교육학회논문지
• /
• 제15권3호
• /
• pp.355-363
• /
• 2011

다문화가정 아동들은 학습 부진 및 학습 결손의 누적으로 이미 심각한 교육격차 문제를 안고 있다. 다문화가정 아동을 위해 수준별 교육이 반드시 필요하지만, 교육현장에서는 다문화가정 아동만을 위해 역량을 집중하기 어려운 현실이다. 이를 위해 수준별 개별 학습에 적합한 교육용 콘텐츠를 다문화가정 아동지도에 필요하나, 다문화가정 아동을 위한 교육용 콘텐츠를 새로 개발하면 예산과 시간이 많이 필요하게 되므로 기존의 교육용 콘텐츠를 다문화 가정 아동도 활용할 수 있도록 개선이 필요하다. 그러므로 본 논문에서는 교육용 콘텐츠 평가도구를 기반으로 다문화가정 아동을 위한 교육용 콘텐츠 적절성 평가도구를 개발하여, 사이버가정학습 4~6학년 국어 콘텐츠를 평가해보고 개선방안을 제시하고자 한다.

• 한국조경학회지
• /
• 제30권1호
• /
• pp.1-10
• /
• 2002

The purpose of this article is to examine land use change in the fringe area of a metropolitan city through multi-temporal data analysis. Change detection has been regarded as one of the most important applications for utilization of remotely sensed imageries. Conventionally, two images were used for change detection, and Arithmetic calculators were generally used on the process. Meanwhile, multi-temporal change detection for a large number of images has been carried out. In this paper, a digital land-use map and three Landsat TM data were utilized for the multi-temporal change detection Each urban area map was extracted as a base map on the process of multi-temporal change detection. Each urban area map was converted to bit image by using boolean logic. Various urban change types could be obtained by stacking the urban area maps derived from the multi-temporal data using Geographic Information System(GIS). Urban change type map was created by using the process of piling up the bit images. Then the urban change type map was compared with each land cover map for the change detection. Dalseo-gu of Daegu city and Hwawon-eup of Dalsung-gun, the fringe area of Daegu Metropolitan city, were selected for the test area of this multi-temporal change detection method. The districts are adjacent to each other. Dalseo-gu has been developed for 30 yeais and so a large area of paddy land has been changed into a built-up area. Hwawon-eup, near by Dalseo-gu, has been influenced by the urbanization of Dalseo-gu. From 1972 to 1999, 3,507.9ha of agricultural area has been changed into other land uses, while 72.7ha of forest area has been altered. This agricultural area was designated as a 'Semi-agricultural area'by the National landuse Management Law. And it was easy for the preserved area to be changed into a built-up area once it would be included as urban area. Finally, the method of treatment and management of the preserved area needs to be changed to prevent the destruction of paddy land by urban sprawl on the urban fringe.