• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.540-543
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• 1986

In this article, recent trends of technology in design of CNC system for machine tools which has increased in number and applications by needs for FA(Factory Automation), save of labor in various industries, are described. These technology improvements in CNC system take place especially in the field of performance, reliability, compactness, price, etc. From these technology improvements, the theme of "performance improvements of CNC system" are selected and mostly described in this article. Also, the major features of a CNC system product of our company and its characteristics in system design are briefly described.described.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.705-709
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• 2007

This paper introduced the system characteristics of advanced EMU to be applied in urban transit system after 2010. The system characteristics are improvements of vehicle efficiency, implementation of lightweight vehicle body, improvements of passenger's convenience, facilities for handicapped people, improvements of system reliability, strengthening national competitiveness.

• International Journal of Railway
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• 제6권2호
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• pp.64-68
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• 2013

In recent years, the speed of a train has been recognized as one of the important factors to determine the competitiveness as a mean of transportation. In line with this, infrastructure improvements and enhancements are being made with increases in the speed of train. Accordingly, there is a need to establish plans for infrastructure improvements through a comprehensive analysis of signals, track/civil engineering, catenary and environment, etc. to improve the speed of a train of high-speed train service sections in Korea. This study proposes improvement plans for catenary systems by investigating the possibility of improvements through performance analysis of catenary equipment by speed increase based on the analysis on catenary systems in Gyeongbu high-speed line, and analysis the applicability of catenary improvements and economic feasibility.

• 대한교통학회지
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• 제3권1호
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• pp.76-85
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• 1985

The significant role of transportation system for economic development process has been recognized, but the argument that transportation improvements stimulate economic development has brought sometimes no resonance in lacking of a plausible theory on the conditions and process of economic development by transportation investment. This paper reviews the theory on regional differentiation of transportation system and shows why and how the installation of a new transportation system or the improvements of the old transportation quality differentiate the spatial order of economic activities. It presents the interaction between the change of transportation quality with introducing of definition "transportation value" as tool of its determination and economic activities following the regional differentiation process, which result means regional defferentiation of niveau of economic development.

• 무역상무연구
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• 제44권
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• pp.213-238
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• 2009

This thesis examines the problems faced in the clearance procedures of Korea's e-customs system for which improvements are necessary, and suggests various ways of overcoming those problems. Practical implications regarding the advancement of Korea's e-customs system are as follows. First, the substructure of the e-customs clearance system, which is the basis for the establishment of a global single window, should be developed into a more modern and advanced system. Second, additional improvements in the law are required to render the broad array of Internet-based export and import documents legally binding. Third, customized services should be provided in order to improve the operating efficiency of the e-customs clearance system. Fourth, the reputation of Korea's e-customs clearance system should be raised via the strengthening of a cooperative system between concerned parties, including exporters and importers. This innovative approach to systematic improvements will come about when we can simplify current customs clearance procedures and establish a fairer customs inspection administration regime. Additionally, when we review the methods intrinsic to our customs system, we must emphasize the urgency of proper completion of related systems and arrangements in the trade business and similar fields.

• 대한안전경영과학회지
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• 제17권1호
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• pp.13-19
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• 2015

Continued efforts to build up Safety Management System(SMS) and to improve its efficiency in airports, to which customers have direct access, are taken for granted due to continuous development of the aviation industry in both quantity and quality and rapid growth of air transportation market. This thesis proposed efficient operation methods of SMS for domestic airport organizations including Incheon International Airport(IIA), the largest airport in South Korea, aiming at strengthening aviation safety from the perspective of airport operators who play a pivotal role in service provider SMS. Those are consolidation of the existing safety management organizations and various improvements to promote voluntary incident reporting system. To draw a proposal for the improvements, conducted a research on domestic safety management status, carried out an analysis on operating conditions and did a research on ICAO regulations, domestic legal system as well as statistics data. Relevant studies and researches were also gathered and analyzed. A search for further improvements can also help increase operational efficiency and promoting a higher-level of safety awareness among operators can establish mature safety culture at airports.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 가을 학술발표회 논문집
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• pp.135-137
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• 2002

NATM has been generalized as a tunnelling method since the early of 1980's in Korea. But the concrete lining as the secondary supporting system based on the NATM concept has not been treated in tunnelling construction. The Purpose of this paper is to study the improvements and the problems of concrete lining in the rock tunnel

• International Journal of Aerospace System Engineering
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• 제3권2호
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• pp.1-8
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• 2016

The improvements in high performance and agility of modern fighter aircraft have led to improvements in survivability as well. Related to these performance increases are rapid response and adequate deflection of the control surfaces. Most control surface failures result from the failure of the actuator. Therefore, the failure and behavior of the actuators are essential to both combat aircraft survivability and maneuverability. In this study, we investigate the effects of flaperon actuator failure on flight maneuvers of a supersonic aircraft. The flight maneuvers were analyzed using six degrees of freedom (6DOF) simulations. This research will contribute to improvements in the reconfiguration of control surfaces and control allocation in flight control algorithms. This paper compares the results of these 6DOF simulations with the horizontal tail actuator failures analyzed previously.

• 대한공간정보학회지
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• 제8권1호
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• pp.27-42
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• 2000

본 연구에서는 사회기반시설의 정비효과계측을 위한 GIS지원시스템을 구축하였다. 정비효과를 계측하기 위한 평가수법으로써는 간이헤도닉접근법과 로젠의 2단계접근법을 동시에 적용함으로써 평가결과의 객관성을 확보하고자 하였다. 두 접근법에 필요한 각종의 토지속성데이타는 GIS지원환경속에서 보다 효율적으로 수집 또는 자동생성할 수 있었다. 또한 GIS를 이용함으로써 보다 객관적이고 정확한 데이타를 제공할 수 있었으며, 사회기반시설의 정비에 따른 편익을 실제위치상에서 계측할 수 있었다. 본 연구에서 개발한 시스템을 활용하여 동경도시권내에 현재 계획중인 죠반신선(瀏晨竊猜)의 정비효과계측에 적용함으로써, 본 시스템의 실용성을 확인할 수 있었다. 사회기반시설의 편익계측작업을 GIS와 통합시킴으로써 본 개발시스템은 사회기반시설계획등의 평가에 유용한 툴(tool)이 될 수 있을 것이다.

• 한국도서관정보학회지
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• 제43권3호
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• pp.101-120
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• 2012

이 연구는 의류학 분야의 학문적 특성과 분류체계를 비교 분석함으로써, 의류학 분야의 분류특성과 문제점을 분석하고 이를 토대로 KDC 제5판 의류학 분야의 분류체계 수정 전개 방안을 제시하였다. 연구결과를 요약하면 아래와 같다. 첫째, 의류학 분야의 학문적 연구영역이 연구분류체계와 문헌분류체계에서는 대부분 민속학(복식), 화학공학(세탁, 염색공학), 제조업(피혁 및 모피공업, 직물 및 섬유공업, 의류제조), 생활과학(의복), 공예 및 장식미술(염직물공예) 등의 세목으로 분산 배치되어 있다. 둘째, 국립중앙도서관의 의류학 분야 KDC 유별 자료현황을 조사하여 특정 분류항목에 지나치게 자료가 집중되고 있는 KDC 문제점을 분석하고 이를 중심으로 개선방안을 제시하였다. 셋째, 분류항목의 수정 전개는 원칙적으로 의류학 분야의 학문체계에 따르되 기존의 KDC 분류체계를 가능한 한 그대로 유지하도록 하였으며, 항목간의 이동은 최소화하였다.