• Journal of Welding and Joining
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• 제31권2호
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• pp.49-56
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• 2013

We have investigated traits of clad metals in hot-rolled clad steel plates, sensitization and mechanical properties of STS 316 steel plate and carbon steel(A516). Clad steel plates were butt-weld by SAW+SMAW, and with the time of heat treatment as the variable, heat treatment was conducted at $625^{\circ}C$, for 80, 160, 320, 640, 1280 minutes. As a way to evaluate it, sectioned weldments and external surfaces were investigated to reveal the degree of sensitization by mechanical property, etching and those of EPR test, results were compared with it. In short, the purpose of this study is suggesting some considerations in developing on-site techniques to evaluate the sensitization of stainless steels.

• 복식문화연구
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• 제7권4호
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• pp.155-167
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• 1999

The present study investigated various sales training programs used by apparel companies and compared each other in order to provide an important information for developing effective training programs for professional salesperson. Sixty eight companies were used and grouped into four categories based on brand characteristics : domestic national brand(DNB), casual brand(CB), foreign brand(FB) and domestic designer brand(DDB). Data were collected from the managers in charge or training salesperson by both questionnaires and personal and telephone interviews. Data were collected during July in 1998, and analyzed by using ANOVA, Duncan\`s multiple range test, and Chi-square test. Since the sample size was small, Yates\` correction formula was used to maximize statistical validity in non-parametric procedure of Chi-square test. The main purpose of sales training indicated by the companies were to satisfy customers and to maximize the profit. Significant differences were found among the groups in the importance level of training contents such as knowledge, and customer relation, training methods, place, and duration/frequency of training at training center.

• 간호행정학회지
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• 제18권1호
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• pp.56-66
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• 2012

Purpose: This study was conducted to compare internal marketing, job satisfaction and customer orientation between nurses in small-medium hospitals and nurses in general hospitals. Method: The participants were 470 nurses were working in 8 small-medium hospitals and 5 general hospitals. Data were collected with structured questionnaires in July, 2010, and analyzed using descriptive statistics, ${\chi}^2$-test, MANCOVA, t-test, One-way ANOVA, and Scheffe test with PASW (SPSS) 18.0 program. Results: There was no significant difference between small-medium hospital nurses and general hospital nurses in internal marketing and customer orientation. But nurses in small-medium hospitals had higher levels of job satisfaction than general hospital nurses. Conclusions: These findings demonstrate the necessity of developing programs that will help to improve job satisfaction in nurses.

• Steel and Composite Structures
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• 제7권5호
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• pp.391-404
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• 2007

This paper presents push-out tests of stud shear connectors to examine their fatigue behavior for developing a new composite bridge deck system. The fifteen push-out specimens of D16 mm stud welded on 9 mm steel plate were fabricated according to Eurocode-4, and a series of fatigue endurance test and residual strength test were performed. Additionally, the stiffness and strength variations by cyclic loading were compared. The push-out test, when the stiffness reduction ratio of the specimens was 0.95 under cyclic load, resulted in the failure of the studs. The stiffness variation of the push-out specimens additionally showed that the application of cyclic loads reduced the residual strength. The fatigue strength of the shear connectors were compared with the design values specified in the Eurocode-4, ASSHTO LRFD and JSSC codes. The comparison result showed that the fatigue endurance of the specimens satisfies the design values of these codes.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회B
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• pp.2070-2075
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• 2008

Identification of steady-state is the first step in developing a fault detection and diagnosis (FDD) system. In a complete FDD system, the steady-state detector will be included as a module in a self-learning algorithm which enables the working system's reference model to "tune" itself to its particular installation. In this study, a steady-state detector of a residential air conditioner based on moving windows was designed. Seven representing measurements were selected as key features for steady-state detection. The optimized moving window size and the feature thresholds was suggested through startup transient test and no-fault steady-state test. Performance of the steady-state detector was verified during indoor load change test. From the research, the general methodology to design a moving window steady-state detector was provided for vapor compression applications.

• 한국신뢰성학회지:신뢰성응용연구
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• 제2권1호
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• pp.23-32
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• 2002

As the function of digital products gets diverse and complex, more than 30~40% job of software developing and testing group within its development cycle, concentrates on the software testing[1]. To cope with consumers'quickly changing needs, development cycle time gets short, and the number of model and test items increase steadily This is why automating software basic function and UI(User Interface) verification is needed [4][5][6]. This paper draws many strength and weakness defines Input/Output through integrating mobile phone, DVDP, PDA, and Black-Box (Intrusive (mobile) or Non-Intrusive(DVDP, PDA)) testing systematically, which brought above the 64% average of automation rate, and ensure 80% of test coverage [4][5][6].

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.1184-1187
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• 2017

우주발사체는 각 단별 추진기관 시스템에 대한 검증이 필요하다. 한국형발사체 추진기관 개발을 위한 추진기관시스템 시험설비(PSTC)가 나로우주센터에 구축되었다. 추진기관시스템 시험설비의 유공압 시스템은 시험대상체의 요구조건에 맞게 추진제 및 각종 가스를 공급하는 역할을 한다. 본 논문에서는 구축된 추진기관시스템 시험설비의 산화제 공급시스템을 소개하였다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.1180-1183
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• 2017

한국형발사체 추진기관 개발을 위한 추진기관시스템 시험설비(PSTC)가 나로우주센터에 구축되었다. 한국형발사체는 산화제로 액화산소를 사용하며, 추진기관시스템 시험설비에서는 한국형발사체로 산화제를 공급하기 위한 산화제 공급 알고리즘을 개발하고 있다. 본 논문에서는 개발 중인 산화제 공급 알고리즘에 대해 소개하였다.

• 한국항해학회지
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• 제3권1호
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• pp.1-17
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• 1979

It is very important for both naval architects and ship's officers to know the maneuvering characteristics of their ships. As the abilities of a rudder which controlls a ship can be determined clearly by analyzing the results of Kempf's zig-zag maneuver and directional stability of a ship also known by Dieudonn spiral maneuver, the importance of turning test which takes much time is recently apt to be neglected. But because the test can be executed comparatively more simply than any other maneuvering tests, it gives some informations on the directional stability, and turning characteristics may be expressed simply by the results of the test, it is still often performed. In this paper several assumptions are made to simplify the turning motion of a ship. The equations of initial transient phase, the radius ofsteady turning circle, and the center of the steady turning point are derived by using the hydrodynamic derivatives. And then the approximate method of drawing the turning circle geometrically is suggested.

• 실천공학교육논문지
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• 제6권2호
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• pp.127-134
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• 2014

Analyzing test data of a vehicle for evaluating its emission performance is an essential process in automotive development field, yet it is intricate and tedious task. In addition, clear understanding and care are required when the analysis process is carried out. Computer software solutions significantly reduce the time and the effort for such analysis. Developing a computer routine to analyze the emission data in a vehicle test demands a complete understanding of the emissions analysis and its related details. In this paper, the principals to develop a LabVIEW analysis routine (VI) are introduced helping automotive engineers comprehend the emission analysis process of a vehicle test data and instruct them to develop similar routines for such analysis.