• Title/Summary/Keyword: on-line analysis

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A study on the sheet drawing using the Matrix method (Matrix법을 이용한 판재 인발에 관한 연구)

  • 유홍균;전병희
    • Journal of the korean Society of Automotive Engineers
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    • v.13 no.6
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    • pp.90-100
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    • 1991
  • This paper represents the analysis of the sheet drawing by applying the Matrix method to Hill's slip-line field for small reduction and indirect type slip-line field in case of large reduction. Results of the analysis represent the relation between the reduction ratio and the die wall pressure, mean drawing stress through rough die. The limitation on the use of this slip-line field is described. When the reduction ratio is given, the optimum die angle is analyzed in this paper.

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Crosstalk Analysis on Printed Circuit Board (인쇄뢰로기판의 누화해석)

  • 박경희;김제영;김수중
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.28A no.9
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    • pp.700-707
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    • 1991
  • Transmission line crosstalk of a printed circuit baord terminated with the linear resistive and nonlinear terminal network is analyzed. Based on a quasi-static approximation, crosstalk voltage is computed in frequency domain by applying the modal analysis. A scheme to calculate the maximum crosstalk voltage for a line terminated with the nonlinear digital gate is proposed. And also, crosstalk quantities are numerically obtained for the microstrip and strip line, and compared with the experimental data to validate relevance of this method.

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A Study on the Shape of the Upper Arm and the Armscye Line (상완부 및 진동형태에 관한 연구)

  • 김순분
    • Journal of the Korean Society of Costume
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    • v.30
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    • pp.201-210
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    • 1996
  • The perpose of this study is to compare and to analyze the characters of the shape of up-per arm and armscye line between young and aged women. The subjects were measured with the Mar-tin's anthropometer and with free curve ruler. 10 items in the shape of upper arm were measured and 16 items in the shape of armscye line measured indirectly based on the measured shape taken from the subjects with free curve ruler and both date were analyzed. Mean standard deviation f-test factor analysis were performed for the statistical analysis of the date. The main results were as follows: 1) The shape of the upper arm is long and narrow in youg women compared with aged. 2) The length of the axilla of the aged women were longer than that of young women. 3) There are significant differences young and aged women on the shape of armscye line. THe length of from the front point of axilla to shoulder point width and depth of the shape of the armscye line length of axilla of aged women were longer than that of young. but the length of from the back point of axilla to shoulder point of yyoung women was longer than aged. 4.) The front point of axilla was existed lower than back point of axilla in aged women while front point of axilla was existed higher than the back point in young. 5) Through the factor analysis two factors were obtained from the shape of the upper arm and five factors from the shape on armmscye line in both groups. Factor compornents in the shape of the up per arm were length width and girth of that and in the shape of the armscye line were width and length of upper and lower back and front part of the shape of the armscye line depth of the axilla. he items in the same factor were resemble each other between two groups.

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The Effect of Hospital Web Service Quality on Initial Trust and Off-line Visit Intention: Focusing on Medium and Small Size Hospital (웹서비스품질이 초기신뢰와 오프라인 방문의도에 미치는 영향: 중소병원을 중심으로)

  • Kim, Sang-Han;Cho, Chul-Ho
    • Journal of Korean Society for Quality Management
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    • v.42 no.3
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    • pp.445-458
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    • 2014
  • Purpose: Present study was designed to examine the casual relationships among web service quality, customer satisfaction, initial trust and off-line visit intention in hospital website. Research object was limited to web service quality of general hospital. We applied path analysis model in order to test the hypotheses and research model. Methods: Survey tool, that is, Questionnaire had obtained validity through literature survey, exploratory survey and pretest and sample 320 was selected. For statistical treatment of pretest and main analysis, SPSS18.0 and AMOS18.0 were employed and Structural equation model was employed as analysis method. Results: Result of this study shows as follows. Factors of web service quality have an effect on customer satisfaction and initial trust, both of customer satisfaction and initial trust have an effect on off-line visit intention. Also customer satisfaction affects initial trust. Especially, customer satisfaction and initial trust were empirically confirmed as the important factors preceding off-line vis it intention. Conclusion: Therefore, present study shows that customer satisfaction and initial trust are important factors that medium and small size hospitals have to emphasize to raise performance. However, present study has some limitations to additionally research in the future.

Nonlinear Finite Element Analysis for Mooring Chain Considering OPB/IPB (OPB/IPB를 고려한 계류체인의 비선형 수치해석)

  • Kim, Min-suk;Kim, Yooil
    • Journal of Ocean Engineering and Technology
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    • v.31 no.4
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    • pp.299-307
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    • 2017
  • The design of the mooring line to maintain the position of an offshore structure in rough marine environments is recognized as a very important consideration. Conventional fatigue evaluation of a mooring line was performed by considering the tensile force acting on the mooring line, but the mooring line broke after 238 days in the girassol area even though the expected fatigue life was expected to be longer. The causes of this event are known to be due to OPB/IPB (out-of-plane bending/in-plane bending) caused by chain link friction due to the excessive tensile strength of the mooring line. In this study, three models with different boundary conditions were proposed for fatigue analysis of a mooring line considering OPB/IPB. Interlink stiffness was calculated by nonlinear structure analysis and a stress concentration factor was derived. In addition, the sensitivity of interlink stiffness according to the magnitude of tensile force, large deformation effect, and coefficient of friction was analyzed, and the effect of critical elastic slip and bending moment calculation position on interlink stiffness was confirmed.

A Study on the Success Factors of On-line Collaboration for Manufacturing Innovation Using AHP Analysis (AHP기법을 이용한 제조혁신을 위한 온라인 협업의 성공요인에 관한 연구)

  • Lee, Sang-Kon;Cho, Sung-Bong
    • Journal of Information Technology Services
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    • v.10 no.3
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    • pp.1-19
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    • 2011
  • The purpose of this study lies in enhancing an understanding of on-line collaboration among manufacturing companies for innovation. To meet this purpose, this study adopts Eisenhart(1989)'s case study approach to explore the success factors of on-line collaboration among Korean small-medium-sized manufacturing companies. Firstly, an exhaustive case study is conducted for four collaboration hubs in the Korean injection mold industry. This study identify the success factors through a structured questionnaire survey and in-depth interviews based on experts of K Institute, which performs the overall management of the collaboration hubs, and personnel of the participating businesses and vendors. Secondly, AHP analysis is conducted to identify the priorities among the success factors. Finally, several propositions of on-lin collaboration are derived.

Isolation and Bioactivity Analysis of Salidroside from Acer tegmentosum using On-line Screening HPLC-ABTS+ Assay (On-line Screening HPLC-ABTS+ Assay을 이용한 산청목으로부터 Salidroside의 분리 및 생물활성 분석)

  • Lee, Kwang Jin;Song, Na-Young;Ma, Jin Yeul
    • KSBB Journal
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    • v.29 no.2
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    • pp.124-130
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    • 2014
  • Acer tegmentosum was a traditional Korean herbal medicine showing various pharmacological activities. In this work, A. tegmentosum were extracted with boiling water and then successively partitioned with dichloromethane, ethyl acetate, n-butyl alcohol (n-BuOH), and water. Salidoside, the target compound, was purified in n-BuOH phase using a chromatography method. For the analysis of salidoside, TLC and LC-MS were used as well as on-line screening $HPLC-ABTS^+$ assay with three different wavelength of 254, 280, and 320 nm. An amount of 1.34 g of salidoside were obtained in n-BuOH phase fromAcer tegmentosum was a traditional Korean herbal medicine showing various pharmacological activities. In this work, A. tegmentosum were extracted with boiling water and then successively partitioned with dichloromethane, ethyl acetate, n-butyl alcohol (n-BuOH), and water. Salidoside, the target compound, was purified in n-BuOH phase using a chromatography method. For the analysis of salidoside, TLC and LC-MS were used as well as online screening $HPLC-ABTS^+$ assay with three different wavelength of 254, 280, and 320 nm. An amount of 1.34 g of salidoside were obtained in n-BuOH phase from 3 kg of dry biomass. The on-line screening $HPLC-ABTS^+$ assay is rapid and efficient tool to search bioactivity from A. tegmentosum. 3 kg of dry biomass. The on-line screening $HPLC-ABTS^+$ assay is rapid and efficient tool to search bioactivity from A. tegmentosum.

A Study on Basic Characteristics of a Coplanar-type Transmission Line Employing Periodic Structure on Si RFIC (Si RFIC상에서 주기적 구조를 이용한 코프레너형 전송선로의 기본특성연구)

  • Joh, Han-Nah;Park, Young-Bae;Yun, Young
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.6
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    • pp.964-973
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    • 2008
  • In this study, a short-wavelength coplanar-type transmission line employing periodic ground structure (PGS) was developed for application to miniaturized on-chip passive component on Si Radio Frequency Integrated Circuit (RFIC). The transmission line employing PGS showed shorter wavelength and lower characteristic impedance than conventional coplanar-type transmission line. The wavelength of the transmission line employing PGS structure was 57 % of the conventional coplanar-type transmission line on Si substrate. Using the theoretical analysis. basic characteristics of the transmission line employing PGS (e.g., bandwidth. loss, impedance, and resonance characteristics) were also investigated in order to evaluate its suitability for application to a development of miniaturized passive on-chip components on silicon RFIC. According to the results. the bandwidth of the transmission line employing PGS was more than 895 GHz as long as T is less than 20${\mu}m$, and the resonance characteristic was observed in 1239 GHz, which indicates that the PPGM structure is a promising candidate for application to a development of miniaturized on-chip passive components on Si RFIC.

Load capacity of high-strength reinforced concrete slabs by yield line theory

  • Gorkem, Selcuk Emre;Husem, Metin
    • Computers and Concrete
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    • v.12 no.6
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    • pp.819-829
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    • 2013
  • The objective of this study is to determine whether or not the yield line theory, an effective method widely used for slabs made of ordinary concrete, can be used also for the reinforced concrete slabs made of high-strength concrete. Flexural behavior of simply supported slabs in three different sizes were investigated under concentrated load at mid-span. Additionally, behavior of high strength reinforced concrete slabs with 50 mm and 150 mm reinforcement spacings also studied. Failure loads, deflections, experimental and theoretical failure mechanisms were evaluated. The difference between the moments based on yield line theory and experimental moments varied between 1% to 3%. Experimental and analysis results revealed that yield line analysis could conveniently be employed in the analysis of high strength reinforced concrete slabs.

Material Handling System Improvement Analysis Applying Simulation Technique (시뮬레이션 기법(技法)을 이용한 물류(物流) 시스템 개선(改善)에 관한 연구(硏究))

  • Shin, Hyeon-Pio;Park, Sung-Yeon;Lee, Hwa-Ki
    • IE interfaces
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    • v.5 no.1
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    • pp.35-46
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    • 1992
  • This paper deals with analysis of material handling system efficiency of a heat-exchanger manufacturing line. This line is a typical flow shop type assembly line which consists of 10 steps of assembly stations. Each station have one or two workers who assemble and move components for the job, and no special transporters for component's movement. Therfore, all the workers are involoved in unnecessary moving activities which decrease overall production efficiencies of the line. To improve productivities, production outputs and worker's job performances for this assembly line, the several alternatives are considered such as installing new conveyor lines and automatic guided vehicle(AGV) system. Analyzing economic feasibilities and responses of the system alternatives, an experimental simulation model is built suing SIMAN Ver. 3. 5 simulation language with CINEMA package for animation of the process flow. Through this animation process a vivid picturial analysis could performed on the process flow.

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