• 전기학회논문지
• /
• 제56권7호
• /
• pp.1302-1308
• /
• 2007

In this paper, a real-time collision avoidance algorithm is proposed for experimental Autonomous Vehicle(XAV). To ensure real-time implementation, a virtual potential field is calculated in one dimensional space. The attractive force is generated by the steering command either transmitted in the remote control station or calculated in the Autonomous Navigation System(ANS) of the XAV. The repulsive force is generated by obstacle information obtained from Laser Range Finder(LRF) mounted on the XAV. Using these attractive and repulsive forces, modified steering, velocity and emergency stop commands are created to avoid obstacles and follow a planned path. The suggested algorithm is inserted as one component in the XAV system. Through various real experiments and technical demonstration using the XAV, the usefulness and practicality of the proposed algorithm are verified.

• 한국생활과학회지
• /
• 제11권2호
• /
• pp.197-209
• /
• 2002

The purpose of this research was to develop of measured scales for purchasing motivation of inbound tourists about fashion goods. A self-administrated questionnaire survey method was conducted among foreign tourists visited in Dongdaemun market. Data from 615 of inbound tourists were analysed by using factor analysis. As the results of the survey, 6 factors related purchasing motivation were derived; satisfaction, practicality, fashion, memory of tourism, eonomy and impromptu. The adequate indexes were shown from final models, such as RMR=.047, SMSEA =.043, CFI=.935, GFI=.956, AGFI=.937 and NFI=.888. It means that these values are appropriate to the measured scales for purchasing motivation of inbound tourists for fashion goods.

• 한국방재학회 논문집
• /
• 제10권2호
• /
• pp.1-5
• /
• 2010

유리온실에 효과적으로 적용할 수 있는 보는 최대한 가벼운 중량을 유지하면서, 요구되는 휨모멘트 강도와 좌굴 강도를 만족시켜야 한다. 이 연구에서는 유리온실의 보 및 기둥 부재로 최근에 제안된 트러스웹을 가진 보의 실무적인 적용성을 확립하기 위해서 휨거동과 좌굴거동을 해석적으로 분석하였다. 이 결과를 바탕으로 횡좌굴 및 국부좌굴을 고려한 부재설계 프로세스를 제시하였다. 또한 유한요소 해석결과를 바탕으로 횡좌굴 혹은 국부좌굴을 지연시킴으로서 단면성능을 향상시킬 수 있는 개선안을 제시하였다.

• 대한한의학원전학회지
• /
• 제33권1호
• /
• pp.81-88
• /
• 2020

Objectives : To investigate how 『Duchanggyeongheombang』 has been adopted and edited in practical texts such as 『Gosachwalyo』, 『Sallimgyeongje』, 『Gosasinseo』. Methods : Based on the disassembled verses of a paragraph in the 『Duchanggyeongheombang』, the 「Duchanggyeongheombang」 contents in 『Gosachwalyo』, 『Sallimgyeongje』,『Gosasinseo』 were compared and examined. Results : 『Gosachwalyo』 directly summarized and quoted the contents of 『Duchanggyeongheombang』 written by Park, Jinhee, while the contents in 『Sallimgyeongje』 and 『Gosasinseo』 are mostly similar, summarizing and quoting from 『Gosachwalyo』. Conclusions : In the perspective of text categorization, while the professional and specialized contents of 『Duchanggyeongheombang』 has been excluded, it was edited in ways of increasing practicality. As these texts were widely dispersed to the public, we can conclude that 『Duchanggyeongheombang』 was very influential in the treatment of douchang(痘瘡, smallpox) among the public.

• 지능정보연구
• /
• 제9권2호
• /
• pp.87-100
• /
• 2003

In managing organizational tacit knowledge, recent researches have shown that it is more applicable in many ways to provide expert search mechanisms in KMS to pinpoint experts in the organizations with searched expertise. In this paper, we propose an intelligent expert search framework to provide search capabilities for experts in similar or related fields according to the user′s information needs. In enabling intelligent expert searches, Fuzzy Abstraction Hierarchy (FAH) framework has been adopted, through which finding experts with similar or related expertise is possible according to the subject field hierarchy defined in the system. To improve FAH, a text categorization approach called Vector Space Model is utilized. To test applicability and practicality of the proposed framework, the prototype system, "Knowledge Portal for Researchers in Science and Technology" sponsored by the Ministry of Science and Technology (MOST) of Korea, was developed.

• 한국농촌건축학회논문집
• /
• 제2권1호
• /
• pp.33-46
• /
• 2000

Go-Sul-Sik(高設式) On-Dol(溫突) houses have a combination of high Ma-Ru and high On-Dol structure. This type of house had been developed in the process of combining Ma-Ru with On-Dol. Go-Sul-Sik On-Dol houses give a clue to unveil exchanging process of Korean On-Dol and Ma-Ru. Go-Sul-Sik On-Dol can be understood as an architectural type of introducing On-Dol into the upper classes' Ma-Ru afterwards. Apparently, Go-Sul-Sik On-Dol houses were not a two-story building. But they had a two-story structure because of On-Dol rooms, which implied a symbolic rank and On-Dol's practicality as well as its being high. Go-Sul-Sik On-Dol houses were peculiar architectural type which realized lives of the very individual authority and symbolic representation within the strict Confucian society. It seemed to be derived from an alternative of the upper classes' architectural culture integrating an ideal into reality.

• 대한의용생체공학회:학술대회논문집
• /
• 대한의용생체공학회 1990년도 추계학술대회
• /
• pp.15-18
• /
• 1990

In abdominal NMR imaging the respiratory ordering techniques have been successfully used to remove the ghosting artifacts arising from the respiratory motion. In the existing respiratory ordering schemes, however, it is generally accepted that blurring of the moving parts still remains as in the signal averaging technique. A new optimal respiratory ordering scheme which can correct the blurring as well as the ghosting artifacts is theoretically derived through the analysis of the phase encoding directional motion effects in Fourier imaging. The performance of the optimal respiratory ordering scheme is experimentally confirmed together with a suboptimal ordering scheme which is suggested as a compromise for the practicality.

• 대한전기학회논문지:시스템및제어부문D
• /
• 제51권3호
• /
• pp.89-95
• /
• 2002

This paper describes a new identification method for friction in motion control systems, in which the friction model is not necessarily linear in parameters. The proposed method works well with any measurement data of velocity and input control force, as long as the initial and final velocities are identical. Most importantly, the proposed method does not require the information of acceleration for its implementation, in contrast with the previously known methods. This is due to the orthogonality property between acceleration and a function of velocity. In particular, if the parametric model is linear in parameters, its friction parameters can be identified in closed form without resorting to numerical search methods. To illuminate further the generality and practicality of the proposed friction identification method, we show good performance of the proposed method through some simulation results.

• 대한전기학회논문지:전력기술부문A
• /
• 제53권1호
• /
• pp.43-55
• /
• 2004

This paper presents a study on evaluating the reliability indices considering a transmission system. Because successful operation of electric power under the deregulated electricity market depends on transmission system reliability management, quantity evaluation of transmission system reliability is very important. This paper introduces features and operation modes of the Transmission Reliability Evaluation for Large-Scale Systems(TRELSS) Version 6.0, a commercial program made in EPRI, and TranRel-I V3.2, a educational program made in GSNU(GyeongSang National University) for assessing reliability indices of composite power system. The packages access not only bulk but also bus indices for reliability evaluation of composite powers system. The practicality, effectiveness and future works of this methodology are illustrated by demonstrations of two case studies of modified IEEE 25 buses reliability test system using TRELSS and TranRel-I and a brief case study for the KEPCO size system using TranRel-II made in GSNU.

• Selected Papers of The Society of Naval Architects of Korea
• /
• 제2권1호
• /
• pp.63-78
• /
• 1994

This paper deals with the treatment of the open boundary in two-dimensional free-surface wave problems. Two numerical schemes are investigated for the implementation of the open boundary condition. One is to add the artificial damping term to the dynamic free-surface boundary condition, in which the determination of suitable damping coefficient and the damping zone is the most important. The other is a modified Orlanski's method, which is known to be very useful for the uni-directional waves. Using these two schemes, numerical tests have been conducted for a few typical free-surface wave problems. To obtain the numerical solution of the free-surface boundary value problem, the fundamental source-distribution method is used and the fully nonlinear free-surface boundary conditions are applied. The computed results are presented in comparison with those of others for the proof of practicality of these two schemes.