• Korean Journal of Veterinary Service
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• v.16 no.1
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• pp.51-56
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• 1993

Feces were collected from pigs of various ages on slaughter house and swinery in the southern area of the kangwon-do. Treponema hyodysenteriae were isolated from the feces by the method of Jenkinson. and the effects of temperature on the survival of these organism were investigated. The results abtained are summerized as follows ; 1. T. hyodysenteriae were isolated from 22 fecal samples of 1, 296 samples, and showed higher incidence at 4-8week age groups than other age groups. 2. The organisms were isolated from 17 samples of 329 diarrhea samples and 5 samples of 967 non-diarrhea samples. 3. T hyodysenteriae survived long at $0-10^{\circ}C$ but survived short at $37^{\circ}C$ or above.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1996.10a
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• pp.175-181
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• 1996

The magnetic levitation system is utilized in the magnetic bearing of high-speed rotor because of little friction, no lubrication, no noise and so on. The magnetic levitation system need the feedback controller for the stabilization of system, and gap sensors are usually used to measure the gap. The use of sensor is troublesome such as sensor trouble, discord between the measurement point and the control point etc. This paper presents the design of robust stabilizing controller by H$_{\infty}$ control theory using the sensorless method proposed already by authors in the magnetic levitation system. And we investigated both the validity of the designed controller and the usefulness of the sensorless method proposed by authors of magnetic levitation system through results of actual experiment..

• Proceedings of the Korean Society of Grassland Science Conference
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• 2005.06a
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• pp.188-189
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• 2005

• Proceedings of the Korean Society of Grassland Science Conference
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• 2005.06a
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• pp.152-153
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• 2005

• The Korean Journal of Emergency Medical Services
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• v.22 no.3
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• pp.55-66
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• 2018

Purpose: This study was conducted to investigate the disaster response competencies of 119 emergency medical technicians (EMTs). Methods: The subjects of this study were 226 119 EMT's at the fire station located in G province. The questionnaire consisted of 5 sub-factors and 29 items for measuring disaster response competencies and the collected data were analyzed using SPSS program. Results: Disaster response competency comprising immediate response, patient triage, patient treatment, patient transport, and collaboration support were 3.48, 3.64, 3.52, 3.64, and 3.16, respectively. Advanced EMTs scored significantly higher in patient triage (p<.001), treatment (p<.001), and transport (p=.022) competency than basic EMTs. Conclusion: In order to improve disaster response competency, it is necessary not only to enhance individual ability but also to continue disaster management training with related organizations.

• 중국학논총
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• no.70
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• pp.139-167
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• 2021

The aspect of consciousness of drifting people expressed in Wang Shizhen's works accurately reflects the trajectory of his life. Living in the environment of the people, he had to play a dual role in caring for and managing the people's society while serving as a manager of Qing dynasty in the home of the people during his youth. In the middle age, when Qing Dynasty was already stabilizing, the consciousness of drifting people gradually disappeared as the wounds and pains of the past were gradually diluted, showing a tendency to take care of life and return to their hometowns.

• Journal of the Korean Society for Precision Engineering
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• v.13 no.7
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• pp.115-121
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• 1996

Multi-axes driving system is more suitable for FMS(Flexible Manufacturing System) compared with a conventional single-azis driving system. It has some merits such as flexibility in operation, improvement of net working rate, maintenance free because of no gear train, etc. However, studies on position synchronous control for high precision in the multi-axes driving system are not enough. In this paper, a new method of position synchronous control is suggested in order to apply to the multi- axes driving system. The proposed method is structured very simply using speed and position controller based on PID control law. Especially, the position controller is designed to keep position error to minimize by controlling either speed of two motors. The effectiveness of the proposed method is successfully confirmed through several experiments.

• Journal of Digestive Cancer Research
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• v.10 no.2
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• pp.99-106
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• 2022

Clinical research ultimately aimed to promptly diagnose and prevent diseases through precise biomarker development. Finding the optimal cut-off point of a regularly measured biomarker can help its interpretation and ultimately help in disease investigation and diagnosis, more specifically in determining the presence of diseases. Therefore, this study aimed to use the characteristics of outcome variables in clinical research to explain how to determine the optimal cutoff point. The outcome variables can be divided into dichotomous, ordinal, and survival types. The optimal cut-off point can be determined by finding points that maximize the Youden index, extended Youden index, and log-rank statistics. This study will enable clinical researchers to accurately determine the optimal cut-off points for regularly measured biomarkers, thereby enabling prompt disease diagnosis for effective treatment.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.2A
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• pp.243-247
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• 2008

An analytical approach to calculate time-dependent stresses and strains in initially cracked reinforced concrete section with biaxial bending was proposed. The method utilized the aging coefficient approach of Bazant and the linear creep theory. The position of neutral axis and strain and stress distributions of cracked section after creep and shrinkage were determined from the requirements of strain compatibility and equilibrium of a section. With this proposed algorithm, examples were given for rectangular section and a comparative analysis for stress and strain was also made.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.441-444
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• 2008

효과적인 조종사의 임무수행을 지원하는 소프트웨어인 비행임무지원체계가 현대 항공작전의 필수 요소로 주목 받고 있다. 첨단 항공기를 위한 비행임무지원체계의 개발을 위해서는 많은 시간과 비용이 소요되며 높은 개발수준을 요구하고 있으나, 국내 실정은 기본 프레임워크 조차 없는 단일 응용 프로그램 개발 수준에 불과하다. 따라서 차기 항공기를 지원하는 향상된 한국형 비행임무지원 체계를 개발함에 있어, 재사용이 가능하며 품질을 향상시켜줄 수 있는 프레임워크의 개발은 매우 중요한 과제이다. 이에 본 논문에서는 한국형 비행임무지원체계의 개발에 적합한 개발 프로세스를 제시하고, 이에 따른 비행임무지원체계의 프레임워크의 설계 및 개발 방향을 제시하고자 한다.