테마파크의 환경단서 분석과 발전방안에 관한 연구 : 대전동물원(오­월드) 방문객을 중심으로

박종진(Park, Jong-jin),최지혜(Choi, Jie-hye) 한국부동산정책학회 2017 不動産政策硏究 Vol.18 No.3

The purpose of this study is to investigate Daejeon Zoo(O-world), which has been attracting attention as a leisure space of Daejeon citizens, in order to complement the scarce tourism resources in Daejeon area and to improve visitor satisfaction and return visit through more efficient and pre - And to suggest a strategy. Especially, it is an empirical study to present the direction that the Daejeon Zoo should prepare or proceed through the analysis of the environmental cues of the Daejeon Zoo. The purpose of this study is to present practical implications. As a result of the study, the most high level of visitor s problems is the necessity to improve the facilities inside the park. In addition, the cost per person is low compared to other theme parks, and the time required to stay is low. Therefore, most of the visitors are not able to use the annual membership or discount program, In order to overcome these problems, it is essential to install more new facilities in the park and to develop new programs that can operate continuously.

첨단안전장치 장착 버스의 사고사례 분석

박종진,최영수,박정만,Park, Jongjin,Choi, Youngsoo,Park, Jeongman 한국자동차안전학회 2021 자동차안전학회지 Vol.13 No.3

Recently a traffic accident of heavy duty vehicles under the mandatory installation of ADAS (Advanced Driver Assistance System) is often reported in the media. Heavy duty vehicle accidents are normally occurring a high number of passenger's injury. According to report of Insurance Institute for Highway Safety, FCW (Forward Collision Warning) and AEB (Automatic Emergency Braking) were associated with a statistically significant 12% reduction in the rate of police-reportable crashes per vehicle miles traveled, and a significant 41% reduction in the rear-end crash rate of large trucks. Also many countries around the world, including Korea, are studying the effects of ADAS installation on accident reduction. Traffic accident statistics of passenger vehicle for business purpose in TMACS (Traffic safety information Management Complex System in Korea) tends to remarkably reduce the number of deaths due to the accident (2017(211), 2018(170), 2019(139)), but the number of traffic accidents (2017(8,939), 2018(9,181), 2019(10,095)) increases. In this paper, it is introduced a traffic accident case that could lead to high injury traffic accidents by being equipped with AEB in a bus. AEB reduces accidents and damage in general but malfunction of AEB could occur severe accident. Therefore, proper education is required to use AEB system, simply instead of focusing on developing and installing AEB to prevent traffic accidents. Traffic accident of AEB equipped vehicle may arise a new dispute between a driver's fault and vehicle defect. It is highly recommended to regulate an advanced event data recorder system.

베벨기어 페쇄단조의 유한요소해석

박종진,이정환,이영선,Park, Jong-Jin,Lee, Jung-Hwan,Lee, Young-Sun 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.8

The rigid-plastic finite element analysis was performed for analysis of ofhot forging and cold sizing of a bevel gear. Two dimensional analysis was carried out to investigate the defect occurrence on vertical symmetric planes during hot forging and three dimensional analysis was to understand the filling behavior on horizontal planes during cold sizing. The involute curve of a tooth was approximated by a circle for convenience in the present analysis. In order to estimate the elastic deformation of the gear and dies during cold sizing, linear elastic finite element analysis was performed. Results of the analysis can be used to predict grain flows and strength distributions in the forged gear, and to design dies and an appropriate preform for the cold sizing.

유비쿼터스 컴퓨팅을 위한 초음파 위치인식 시스템의 인식영역 확장 기법에 관한 연구

박종진,이동활,김수용,문영성,Park Jong-Jin,Lee Dong-Hwal,Kim Su-Yong,Mun Young-Song 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.7B

This study presents an ultrasonic location awareness system for the ubiquitous computing with absolute position. The flight time of ultrasonic waves is determined by a period detecting technique which is able to extend the sensing range compared with traditional methods. For location awareness, ultrasonic waves are sent successively from each ultrasonic transmitter and synchronized by radio frequency (RF) signal, where the transmitting part is fixed and the receiving part is movable. To expand the recognizing range, cell matching technique and coded ultrasonic technique are introduced. The experimentation for various distances is accomplished to verify the used period detecting technique of U-SAT system. The positioning accuracy by using cell matching is also verified by finding the locations of settled points and the usability of coded ultrasonic technique is verified. As a result, the possibility of ultrasonic location awareness system for the ubiquitous computing can be discussed as a pseudo-satellite system with low cost, a high update rate, and relatively high precision, in the places where GPS is not available. 이 연구는 유비쿼터스 컴퓨팅 환경에서 절대 위치 좌표를 제공할 수 있는 초음파 위치인식 시스템에 관한 것이다. 무선(RF: Radio Frequency) 신호에 의해 동기화된 다수의 고정된 발신기가 순차적으로 초음파를 발신하며, 초음파 신호들을 수신한 수신기에서 TOF를 파악하여 이를 거리로 환산한 다음 위치정보를 계산한다. 초음파의 전파시간(TOF: Time of Flight)은 주기인식 방법을 통해 파악한다. 또한 유비쿼터스 컴퓨팅을 위한 인식 영역의 확장을 위해 셀 매칭 기법과 부호화된 초음파 기법을 제안한다. 초음파 위치인식 시스템인 U-SAT을 사용하여 주기인식 기법의 유용성을 입증하기 위하여 다양한 거리에서 실험을 수행하였다. 또한 셀 매칭 기법에 의한 영역 확장에서도 위치 측정의 정확도를 검증하였으며 부호화된 초음파 기법의 분석으로 그 유용성도 입증하였다. 그 결과로 인해 저가격, 높은 갱신율, 그리고 상대적으로 뛰어난 정밀도의 입장에서 GPS가 적용될 수 없는 환경에서의 유비쿼터스 컴퓨팅의 위치인식 시스템으로서의 가능성을 입증하였다.

소성가공을 위한 연성파괴조건의 재고찰

박종진,이영석,Park, Jong-Jin,Lee, Young-Seok 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7

In metalforming, ductile fracture criteria have been used for the purpose of predicting fracture occurrence in the stage of process design prior to manufacturing. In the present investigation, some of popular criteria are reviewed to find the most suitable one among them. As a result, it is found that the modified Cockroft and Latham criterion is better than others. The reasons are: it agrees with Roy's and McClintock's void growth models, it is more general than Oyane's and Kuhn's criteria, and it predicts fractures in compression as well as in tension well. However, it is also found that the criterion is incapable of predicting fractures in torsion.

Java를 이용한 웹 기반 원격 감시제어시스템 개발

박종진,Park, Jong-Jin 한국컴퓨터산업학회 2007 컴퓨터産業敎育學會論文誌 Vol.8 No.1

In this paper, a example of a development of web-based remote monitoring and control system using Java technology on TCP/IP is proposed. We implemented Client/Server socket programs using Java Socket class, and applied those to a greenhouse made from LEGO blocks and made web-based greenhouse remote monitoring and control system. Implemented System transferred states of greenhouse to client programs, and control signals from client program were transferred to Server. Greenhouse model was controlled well by the system. 본 논문은 Java 기술을 이용하여 TCP/IP 상에서 웹 기반의 원격 감시제어시스템 개발에 대한 예를 제시하였다. Java의 Socket 클래스를 이용한 클라이언트/서버 소켓 프로그램을 구현하였고 이를 레고 블록으로 만든 온실 모델에 적용하여 웹 기반 온실 감시제어시스템을 구축하였다. 구축된 웹 기반 온실 감시제어시스템은 온실의 정보를 클라이언트 프로그램에 잘 전달하여 표시하며 웹 상에서 동작하는 Java Applet 클라이언트에서 보내는 제어 신호를 서버를 통해 온실 모델에 잘 전달하여 동작시키는 것을 볼 수 있었다.

Disciplinary Session 9 / Sport Biomechanics / Skill Analysis in Sport Biomechanics : 축구골 정면에서 좌측 모서리로 인스텝 슛시 임팩트 순간의 운동역학적 분석

박종진,오정환 ( Jong Jin Park,Jeung Whan Oh ) 한국체육학회 1998 국제스포츠과학 학술대회 Vol.1998 No.2

H 형강압연 해석기술의 응용

박종진,김정호 ( Jong Jin Park,Jeong Ho Kim ) 대한금속재료학회 1996 압연기술의 현재와 미래 Vol.- No.-

Digital Modeling of a Time delayed Continuous-Time System

박종진,최규석,박인규,강정진,Park, Jong-Jin,Choi, Gyoo-Seok,Park, In-Ku,Kang, Jeong-Jin The Institute of Internet 2012 한국인터넷방송통신학회 논문지 Vol.12 No.1

Control Theory for continuous-time system has been well developed. Due to the development of computer technology, digital control scheme are employed in many areas. When delays are in control systems, it is hard to control the system efficiently. Delays by controller-to-actuator and sensor-to-controller deteriorate control performance and could possibly destabilize the overall system. In this paper, a new approximated discretization method and digital design for control systems with multiple state, input and output delays and a generalized bilinear transformation method with a tunable parameter are also provided, which can re-transform the integer time-delayed discrete-time model to its continuous-time model. Illustrative example is given to demonstrate the effectiveness of the developed method. 연속시간 시스템의 제어 이론은 잘 개발되어 왔다. 컴퓨터 기술의 발달로 인해 디지털 제어 기법이 여러 분야에 적용되어 왔다. 제어 시스템에 시간 지연이 있는 경우는 시스템을 효율적으로 제어하는 것이 어렵다. 제어기와 액츄에이터 그리고 센서와 제어기 간에 있는 지연은 제어 성능을 떨어뜨리고 전체 시스템을 불안정하게 할 수 있다. 본 논문에서는 다중의 상태, 입력 그리고 출력 지연을 가지는 제어 시스템을 위한 새로운 근사 이산화 방법과 디지털 설계 그리고 조정가능한 계수를 가지는 일반화된 쌍선형 변환 방법을 제안한다. 이 방법은 정수의 시간 지연을 가지는 이산 시간 모델을 동일한 연속 시간 모델로 다시 변환할 수 있다. 실제적인 예제를 통해 제안된 방법의 효율성을 증명한다.

미국 단조산업의 현황과 전망

박종진,Park, Jong-Jin 재료연구소 1992 機械와 材料 Vol.4 No.1