• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.57-61
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• 2011

The bimodal tram was designed to drive on the dedicated track as well as on the public road. The position and speed are automatically controlled on the dedicated track by the onboard computer, whereas they are manually controlled by driver like motor vehicles on the public road. The ride comfort the passengers feel and the effect of the vibration generated during driving on the passenger's health, comfortableness and motion sickness were evaluated with driving the bimodal tram prototype in automatic and manual mode, respectively. The test was done in automatic mode on the test track with various load conditions while it was done in manual mode on the public road with empty load.

• 한국가스학회:학술대회논문집
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• 한국가스학회 1999년도 추계학술발표회 논문집
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• pp.165-174
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• 1999

• 한국인터넷방송통신학회논문지
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• 제16권4호
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• pp.47-52
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• 2016

본 연구에서는 고고도 핵폭발에 기인한 HEMP의 영향으로부터 민간시설의 적합한 보호를 위한 HEMP 보호용 전원선 필터 구현 필요성을 다루기 위해, HEMP 관련 국방 규격 분석 및 바리스터, 관통형 커패시터, 가스방전관, 인덕터 등의 주요 소자들에 대한 분석을 수행하고, 이를 기반으로 단상 220VAC/16A 용량의 HEMP용 전원선 필터를 간이 제작하였다. 또한 배선용 차단기, 서지 보호기, EMI 필터 등과의 MIL-STD-188-125 PCI 규격 기반의 비교 실험을 수행하였다. 결과적으로 HEMP에 의한 전도성 노이즈로부터 시스템을 보호하기 위해서는 HEMP 보호 전용 필터의 개발이 필수조건임을 확인하였다.

• 한국재료학회지
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• 제29권6호
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• pp.363-370
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• 2019

The recent development of information and communication technologies brings new changes to automobile traffic systems. The most typical example is the advancement of dedicated short range communication(DSRC). DSRC mainly consists of an intelligent transportation system(ITS), an electronic toll collection system(ETCS) and an advanced traveler information system(ATIS). These wireless communications often cause unnecessary electromagnetic waves, and these electromagnetic waves, in turn, cause frequent system malfunction. To solve this problem, an absorber of electromagnetic waves is suggested. In this research, various materials, such as powdered metal and iron oxides, are used to test the possibility for an effective absorption of the unnecessary electromagnetic waves. The various metal powders are made into a thin sheet form by compositing through processing. The electromagnetic characteristics(complex permittivity, complex permeability) of the fabricated sheet are measured. As a result, we achieve -6.5 dB at 940 MHz(77.6 % absorption rate) with a 1.0 mm-thickness electromagnet wave absorber, and -9.5 dB at 940 MHz(88.8 % absorption rate) with a 2.0 mm-thickness absorber.

• 전자공학회논문지A
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• 제32A권9호
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• pp.1202-1208
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• 1995

Inter-processor communication is required to manage resources in ATM switching system where processors are distributed. ATM switching system, which was developed in our institute, does't have dedicated communication path for inter-processor communication, but use the ordinary switching network same as user data. Therefore, we should test communication paths and equipments before running various application software programs. In this paper, we propose a method to test communication paths between processors in ATM switching system and describe an implemented program using this method.

• 실천공학교육논문지
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• 제13권3호
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• pp.443-451
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• 2021

대부분의 대학에서 4차산업혁명시대의 융합형 인재양성을 위해 연계전공, 융합전공 등 다학제적 접근을 통한 교육혁신을 시도하고 있다. 본 연구는 연계전공을 이수하는 학생들의 교육요구의 우선순위를 파악하여 연계전공의 효과적인 운영방안을 모색하는 것을 목적으로 한다. 이를 위해 연계전공에 참여한 학생들을 대상으로 포커스 그룹 인터뷰를 실시하여 연계전공 활성화를 위해 필요한 대학 차원의 지원을 탐색하였고, 온라인 조사를 통해 t-test, Borich의 요구도, The Locus for Focus Model을 적용하여 최종 우선순위를 도출하였다. 분석결과 '전담조직 설치 및 운영', '전용 강의실 및 실습실'이 최우선으로 고려해야 할 요인으로 도출되었고, '커리큘럼 특성화', '연계전공 장학금 지원', '연계전공 홍보', '전담조교 배정'이 차우선 고려요인으로 도출되었다. 이러한 연구결과를 바탕으로 대학 연계전공의 교육요구 우선순위에 대한 활성화 방안과 시사점을 제안하였다.

• 가정∙방문간호학회지
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• 제29권2호
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• pp.165-174
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• 2022

Purpose: This study was a descriptive research design to identify nursing professionalism, communication competence, and working environment factors of dedicated COVID-19 hospital nurses and investigate factors affecting person-centered care. Methods: Participants were 211 nurses working in one tertiary hospital, two general hospitals, and one dedicated COVID-19 hospital in a metropolitan area. Collected data were analyzed using descriptive analysis, an independent t-test, one-way ANOVA, Scheffé test, Pearson correlation coefficient, and multiple regression analysis. Analysis was performed using SPSS 26.0 software. Results: Person-centered care was statistically significant. It positively correlated with nursing professionalism (r=.57, p<.001), communication competence (r=.56, p<.001), and nursing work environment (r=.60, p<.001). As a result, communication competence (𝛽=0.33, p<.001), hospital type (𝛽=0.25, p<.001), nursing professionalism (𝛽=0.23, p=.002), nursing work environment (𝛽=0.18, p=.006) and clinical career (𝛽=-0.11, p=.045) in that order. The regression model was statistically significant (F=30.467, p<.001) and showed an explanatory power of 49.6%. Conclusion: It is necessary for individuals and hospitals to provide opportunities for nurses to participate in various education and programs to improve person-centered care. This may enable them to enhance their nursing professionalism and communication competence.

• 전자공학회논문지B
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• 제32B권8호
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• pp.1064-1073
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• 1995

On a bus-based shared memory multiprocessing system, the system bus monitoring and analysis are crucial for system integration test and performance analysis. In this paper, the design and implementation of a bus monitoring instrument for the TICOM-III system are decribed. The instrument dedicated to TICOM-III, which is called the Bus Information Procssing Unit, analyzes the bus state and measures the bus utilization. It performs many useful functions to help debugging the system, and offers a simple user interface.

• International Journal of Aeronautical and Space Sciences
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• 제1권2호
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• pp.30-42
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• 2000

On-orbit thermal environment test of KOMPSAT was performed in early 1999. An analysis of the test data are addressed in this paper. For the thermal-environmental simulation of spacecraft bus, an artificial heating through the radiator zones and onto some critical heat-dissipating electronic boxes was made by Absorbed-heat Flux Method. Test data obtained in terms of temperature history were reduced into flight heater duty cycles and converted into the total electrical power required for spacecraft thermal control. Verification result of flight heaters dedicated to the bus thermal control is presented. Additionally, an exhaustive heating-control process for maintaining the spacecraft thermally safe and for realistic simulation of the orbital-thermal environment during the test are graphically shown. Qualitative suggestions to post-test model correlation are given in consequency of the analysis.

• 한국정보시스템학회지:정보시스템연구
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• 제31권1호
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• pp.239-269
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• 2022

Purpose This paper attempts to identify items for improving the usage of PLM(Product Lifecycle Management) systems and suggests ways to prioritize improvement items on the basis of importance. It also tries to find out differences in the importance of improvement items due to the company size, the industry, the job, or the PLM solution. Design/methodology/approach Through a survey from participants to a PLM System Conference, data were collected from a sample of 181 users who had the previous experience in using a PLM system. In order to figure out the differences in the importance among user groups, the F-test with the Scheffe test as a post-hoc analysis was used in case of equal variances and the Welch test with the Dunnett T3 test was used in case of unequal variances. Findings This study sorted out 25 improvement ideas according to their importance assessed by the PLM system users. The top five ideas are improving data consistency, error minimization, fast system response time, enhancing user recognition, and business process improvement. The support group puts higher importance than the general user group in data consistency, fast system response time, enhancing user recognition, business process improvement, dedicated team for data consistency, continuous support from management, hardware performance upgrade, output linkage to other systems, and shortening problem solving duration. The largest company group attaches significantly higher weights than the smallest company group to data consistency, error minimization, fast system response time, business process improvement, dedicated team for data consistency, security with proper access management, output linkage to other systems, and better user interface.