• Proceedings of the KSR Conference
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• 2003.10c
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• pp.611-616
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• 2003

The application of the tilting train is one of the most efficient ways to increase curving speed of train on existing tracks or on mountain railway lines with sharp curves. It can increase the running speed and ensure the passenger comfort and safety at the same time. Therefore, the development of tilting train has been paid high attention by many countries in the world. Tilting trains have been operated successfully in many countries such as Italy, Spain, Germany, Sweden, England and so on. The tilting trains possess broad prospects in raising speeds. The distributed EMU tilting train set will be developed according to the Korea railway conditions and will be operated on the Honam line, Janghang line and Jungang line. Because there is high percentage of curves on these lines. these lines are suited to operating tilting trains to raising speed and saving passenger traveling time. In order. to improve the curving performance of the tilling train. the active-control algorithm is utilized for the tilting bogie.

• Proceeding of EDISON Challenge
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• 2016.03a
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• pp.513-515
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• 2016

There are various walking devices based on Theo Jansen mechanism. And these systems controlled by complicate equations. So we decided to optimize the design of walking device with two points of view. The device is required to ensure stability while maintaining the high speed. To simplify the control system, we applied trigonometric ratio with ideal Jansen trajectory. As a result, we were able to draw the connection between height of barrier and Ground Length (GL). Also we could change traveling distance and Ground Angle Coefficient (GAC) by shifting the position of the joints. Through controlling these parameter, we can analyze stability and speed of the device. Ultimately, we develop the device that can walk more efficiently by the optimization process.

• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.1389-1391
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• 1996

In this paper, we applies two methods - Genetic Algorithm(GA) and $A^*$ Algorithm - to find the optimal path in route guidance system. Under the assumption that the traveling costs of each link are given, the task to find the optimal path becomes very complicated problem if the number of nodes or links increase. Two well-known algorithms are modified to resolve the problem and the preliminary demonstration show both optimistic result and needs to improvement.

• Journal of the Korean Society of Hazard Mitigation
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• v.2 no.4 s.7
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• pp.97-116
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• 2002

In this papers, a finite element formulation is proposed for dynamic analysis of vehicle-bridge interaction problems under realistic loading conditions. Although the formulation presented in this paper is based on the consideration of only a single traversing vehicle, it can be extended to include several different bridge configurations. The traversing vehicle and the vibrating bridge superstructure are considered as an integrated system. Hence, although material and geometric nonlinearities are excluded, this introduces nonlinearity into the problem. Various vehicle models, including those with suspension systems, are considered. Traveling speed of the vehicle can be varied. The finite element discretization of the bridge structure permits the inclusion of arbitrary geometrical configurations, and surface and boundary conditions. To obtain accurate solutions, time integration of the equation of vehicle-bridge motion is carried out by using the Newmark method in connection with a predictor-corrector algorithm.

• Magazine of the Korean Society of Agricultural Engineers
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• v.44 no.2
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• pp.127-135
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• 2002

Due to the fact that the design of a reinforced concrete structure changes in accordance with its shape and assigned load, total automation of the design system has not been achieved. For instance, since there is no general rule about setting up reinforcing steel quantity and arrangement location, it is simply not feasible to automatically decide the reinforcing arrangement location. In this study, the ESO(evolutionary structural optimization) technique and its related issues will be discussed. The ESO techniques is determined the reasonable load path which is traveling of load between in-flow and out-flow at a concrete structure using numerical analysis. And the results applied to the steel arrangement in reinforced concrete structures. The optimal algorithm, which determines the terminal criteria during ESO process, has been updated by using the obtained results. And the load path within the member has been determined automatically.

• Journal of Korean Institute of Industrial Engineers
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• v.33 no.3
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• pp.303-311
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• 2007

This study deals with a type of vehicle routing problem faced by manager of some department stores during peak sales periods. The problem is to find a set of traveling paths of vehicles that leave a department store and arrive at a destination specified for each vehicle after visiting customers without violating time and capacity constraints. The mathematical model is formulated with the objective of maximizing the sum of the rewards collected by each vehicle. Since the problem is known to be NP-hard, a heuristic algorithm is developed to find the solution. The performance of the algorithm is compared with the optimum solutions obtained from CPLEX for small size problems and a priority-based Genetic Algorithm for large size problems.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.54.2-54
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• 2001

In this paper two control strategies, command shaping control and optimal control, which aim to the reduction of the residual vibrations of the payload in a container crane system are investigated. Both control methods are open loop control. Due to unmodeled dynamics of the plant and disturbances like initial sway and wind, some residual sway always exists at the end of trolley movement. Command inputs are designed to achieve the control objectives including minimal residual vibration and robustness in the presence of unmodeled dynamics. Simulation results of various command inputs are compared in terms of arrival time, residual sway angle, robustness, and maximum sway distance during the traveling. Command shaping method provides a more competent tool than optimal control.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.297-299
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• 2011

본 논문은 여행지에서 스마트폰을 이용해 맛집을 검색하여 방문하는 앱을 수행해 봄으로써 스마트폰의 활용도를 높였다. 본 앱을 활용하여 처음 방문하는 지역에서 맛집을 검색하여 거리를 측정해 보고 최단코스를 확인한 후 찾아가 보자. 본 앱은 각 지역이 맛집에 대한 DB를 등록해 두고 개인적인 취향을 기록해 두기 위해 평점을 분류해서 입력하도록 배치하였고 본인의 추억을 기록할 입력란을 추가해 두었다. 교통편에 대한 정보 필드도 설계하여 여행의 접근성도 높였으며, 맛집은 물론 유명 관광지, 지인의 집 정보 입력 등으로 DB를 확장해서 활용 가능하다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1698-1700
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• 2010

Zigbee기반 자전거 동호회 주행관리 시스템은 동호회 회원들 사이에서 자신의 위치 파악과 활동 중 생기는 낙오자(체력이 떨어져 뒤처지는 회원 등)들을 관리하여 동호회를 보다 효율적으로 관리하기 위한 시스템이다. 저전력 소모와 소형의 크기, 실시간 네트워크기능을 가진 Zigbee의 기능을 이용하여, 각각의 Zigbee가 서로의 네트워크 신호를 감지한 후, 다른 회원들이 있는지를 디스플레이에 표시한다.

• Korean Security Journal
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• no.2
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• pp.227-258
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• 1999

In a broad sense, ‘After-care SYSTEM’ for discharged prisoners mean legal actions of prisoners who have been released from lawful detention In its narrow sense, mean preventive protection and observation activities under regular guidance and supervision against those released from penal facilities after a certain period of detention Therefore, they should not be viewed as objects of mere concern or social work programs but preventive protection should he provided to them as part of national criminal policy After-care system is in the following two ways, The one is based on individual prisoner's request and consent, which is called 'Voluntary After-care system', The other is the one which is not based in personal request or consent but is based on obligation, which is named 'Compulsory After-care system In Korea, however no Compulsory After-care system is in practice Voluntary After-care system is to be carried out 6 method in the following by existing Probation, Parole Law. (1) offer of board and lodging (2) allowance of Traveling expense (3) allowance of occupation instrument or lending rehabilitation fund (4) training of occupation and vocational guidance (5) self-reliance support for After-care probationer (6) guidance of good deed And then to establish the society without offenders is the ideal of human beings, but criminal acts don't fade away, so in the field of the science of criminology, the importance of correctional system has become greater. The correctional idea has moved from severe punishment to educational rehabilitation for the goal of protecting both offender and security from the threat of crime in to day Some it is required that Compulsory After-care system is most important system in effective measures, and that existing Probation, Parole Law in Korea is renewed into Compulsory After-care system in the future.