• 한국기록관리학회지
• /
• 제17권4호
• /
• pp.177-200
• /
• 2017

빅데이터, 인공지능 등 신기술 환경에서 LOD는 기록정보자원을 내외부의 다양한 데이터들과 연결되도록 할 것이다. 이러한 연결의 중심에는 상호연결(Interlinking) 기술이 존재하며, 상호연결된 LOD는 기록정보 개방을 데이터 개방(Open Data)의 최상위 단계로 실현할 것이다. 지속적으로 증가하는 기록의 양을 감안하면, LOD 구축 시 상호연결 알고리즘을 통한 자동화는 필수적이다. 이에 본 연구는 기록정보가 외부 데이터와 상호연결되는 구조와 상호연결 시 고려해야 할 기록정보의 특성을 분석하였다. 또한 국가기록원 CAMS 데이터의 샘플을 수집하여 기록정보 LOD를 구축한 뒤, 기록물 메타데이터의 인물정보를 DBPedia와 자동으로 상호연결하는 테스트베드를 진행하였다. 이를 통해 상호연결 자동화 프로세스를 확인하고, 자동화 기술의 성능과 정확도를 확인하였다. 그리고 테스트베드를 통해 얻은 시사점을 통해 기록정보 LOD 상호연결 과정의 고려사항을 파악하였다.

• 한국통신학회논문지
• /
• 제34권7A호
• /
• pp.540-547
• /
• 2009

본 논문은 OFDMA 기반 무선 이동통신망에서 이동단말 초기접속 시 레인징 슬롯의 효율적인 사용방안에 대해서 연구하였다. 특히 이동단말의 초기 경쟁접속 시 이용하는 레인징 슬롯의 충돌발생 증가 경우에 이를 감소시키는 방얀을 포함한 자동적응형 알고리즘을 연구하였다. 그 결과로서 초기 접속요청에 있어서 접속요청 단말의 증감에 따른 충돌을 최소화하고 초기접속요청 슬롯의 범위를 자동척이며 다이나믹하게 가변적으로 유지하는 알고리즘을 제안한다. 제안된 알고리즘의 성능평가를 위하여 현재 IEEE802.16e 표준의 고정된 초기접속용 슬롯할당 방식과 충돌 발생횟수 및 슬롯의 사용률에 대하여 제안된 알고리즘과 비교하였다. 성능평가를 위한 시뮬레이터 구현을 위하여 IEEE802.16e 기반 MAC 계층의 프레임구조 및 동작절차를 시뮬레이터로 구현하여 성능분석을 수행하였다. 시뮬레이션 결과로부터, 본 논문에서 제안된 자동적응형 알고리즘은 설치된 기지국의 유지보수 비용절감효과가 크므로 연근해 해상 무선통신을 위한 무인기지국 건설에 매우 큰 기여를 할 것으로 기대한다.

• 한국정보통신학회논문지
• /
• 제22권3호
• /
• pp.548-556
• /
• 2018

NMS(Network Management System)는 네트워크 관리를 목적으로 소규모 또는 대규모 네트워크를 운영하는 곳에서 필수적으로 사용되는 시스템이다. 기존 NMS에서는 네트워크 규모가 커지고 구성정보가 복잡해짐에 따라 네트워크 현황파악이 점점 어려워지고 있으며 네트워크 장비의 장애진단에 시간이 많이 소요된다. 본 논문에서는 NMS의 문제점을 보완하기 위해 JavaScript와 Python, HTML5 기반의 TWaver를 이용하여 자동으로 웹 기반 네트워크 토폴로지를 구현한다. 토폴로지 세부 구현 내용으로는 NMS시스템에 등록된 장비 정보를 기반으로 장비의 연결정보를 자동으로 수집하여 수집정보를 데이터화하고, 웹 기반의 네트워크 토폴로지를 구현하며 구현된 토폴로지에서 원격 장애진단을 수행할 수 있는 기능을 포함한다. 네트워크 토폴로지에서 구성관리, 장애관리, 성능관리 기능을 종합적으로 추가하여 사용자가 네트워크 관리를 함에 있어 체계화된 데이터 관리를 통해 NMS시스템의 품질 향상을 기대할 수 있다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 춘계학술대회 논문집
• /
• pp.1716-1721
• /
• 2011

The Public Address and Passenger Information System of Rolling Stock should be able to perform automatic announcements in connection with TCMS(Train Control and Monitoring System), common announcements and emergency announcements for safe operation and the passengers. CCTV(Closed Circuit Television) System also should be able to watch passenger compartment for safety. Those equipments are very important thing for train service and safety. but the installation of equipment is restricted by space, weight, modulation. therefore, Passenger Information Intergrated System(PIIS) is required to consider economical efficiency, technical trend, expansion and space insufficiency. and system based on IP network has to be considered as new PIIS. so PIIS could meet economical efficiency and expansion. and it could go further and share network with TCMS and others.

• Advances in aircraft and spacecraft science
• /
• 제3권4호
• /
• pp.399-425
• /
• 2016

The dynamical requirements are obtained for airplanes to travel on inclined circular trajectories. Formulas are provided for determining the load factor, the bank angle, the lift coefficient and the thrust or power required for the motion. The dynamical properties of the airplane are taken into account, for both, airplanes with internal combustion engines and propellers, and airplanes with jet engines. A procedure is presented for the construction of tables from which the flyability of trajectories at a given angle of inclination can be read, together with the corresponding minimum and maximum radii allowed. Sample calculations are shown for the Cessna 182, a Silver Fox like unmanned aerial vehicle, and a F-16 jet airplane.

• 전기학회논문지P
• /
• 제55권3호
• /
• pp.128-132
• /
• 2006

The previous MCCs(Motor Control Centers) have the demerits of high cost and much manhour for rework because it is impossible for us to standardize the previous MCCs and they have many manual connections. The customers require the products which can operate with the SCADA system by digitalizing the functions of the current MCCs and the systematized products with capability of remote control. To solve these disadvantages and requirements, we developed the Intelligent Motor Control Center. This system has the various functions such as protection, measuring, and communication. Using these functions, we can monitor motor status through communication with the upper system and define the circuit for lowering connection costs according tn starting type and shortening the manufactural period by the graphic editor. The development of this system results in establishment of the competitive structure with domestic area and Perfect automatic monitoring through linkage with the SCADA system.

• 한국실내디자인학회논문집
• /
• 제11호
• /
• pp.38-44
• /
• 1997

According to office building design in Korea, building exterior and office automatic systems through introducing IB system have been improved. However, the lower floors of a building are functionally easy to transfer but actually functions as an enterance. Although at takes a large investment by the owner or enterprise, mainly the tenants and neighbors are in a broad sense the actual users. In this point of view, the lobby of an office bulidling which is the connection between the exterior as a public space and the interior as a private area, does not only have the function of an enterance but also has to be an image of the enterprise or the building itself. Therefor the lobby must contain various functions of space.

• 대한산업공학회지
• /
• 제20권1호
• /
• pp.99-112
• /
• 1994

This paper describe the development of a systematic method of slicing solid parts based on a data structure called Sliced Profile Data Structure(SPDS). SPDS is an augmented polygon data structure that allows multiple layers of sliced profiles to be connected together. The method consists of five steps: (1) Selection of slicing directions, (2) Determination of slicing levels, (3) Creation of sliced profiles, (4) Connection of sliced profiles, and (5) Refinement. The presented method is aimed at enhancing the applicability of CSG for manufacturing by overcoming the problem of non-uniqueness and global nature. The SPDS-based method of feature extraction is suitable for recognizing broad scope of features with detailed information. The method is also suitable for identifying the global relationships among features and is capable of incorporating the context dependency of feature extraction.

• 전자통신동향분석
• /
• 제33권4호
• /
• pp.70-80
• /
• 2018

Drones are now widely used in civilian applications such as filming, leisure, agricultural control, monitoring, and the generation of 3D-spatial information, deviating only from military drones. In the field of logistics, prototypes are emerging in the area of logistics transportation, and to develop a future transportation service under the name of a drone tax, each country is introducing its first flight results using its own unique drones. In this paper, we review the domestic and overseas trends of drone delivery service technology, which requires various capabilities such as automatic flight, and review the related core technologies. We then propose the flight capability and road map of a drone delivery service according to the detailed conditions such as the flight area, visibility, and flight method. Additionally, in connection with the postal processing of the Korea Post Office, which would be a main demand for this type of service, we describe a method for realizing a drone delivery service based on the structure, scenario, and deployment of the drone delivery system.

• Journal of Electrical Engineering and information Science
• /
• 제3권1호
• /
• pp.1-7
• /
• 1998

High-Level synthesis of digital circuits calls for automatic translation of a behavioral description to a structural design entity represented in terms of components and connection. One of the critical steps in high-level synthesis is to determine a particular scheduling algorithm that will assign behavioral operations to control states. A new scheduling algorithm called Data Availability Scheduling (DAS) for high-level synthesis is presented. It can determine an appropriate scheduling algorithm and minimize the number of states required using data availability and dependency conditions extracted from the behavioral code, taking into account of states required using data availability and dependency conditions extracted from the behavioral code, taking into account resource constraint in each control state. The DAS algorithm is efficient because data availability conditions, and conditional and wait statements break the behavioral code into manageable pieces which are analyzed independently. The output is the number of states in a finite state machine and shows better results than those of previous algorithms.