• Title/Summary/Keyword: T-test analysis

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Development of an Educational Program to Prevent Cervical Cancer among Immigrants in Korea

  • Choi, So Young
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.9
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    • pp.5345-5349
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    • 2013
  • Background: This study developed and measured the effects of a cervical cancer prevention program for married women immigrants. Materials and Methods: A nonequivalent control group pre-test/post-test design was used with a group of married women immigrants registered at the multi-cultural center in the city of "J." Data on for 30 participants in the intervention group and 27 participants in the control group (N=57) were used for analysis. The intervention group attended a 4-session cervical cancer prevention program. Results: The knowledge of the intervention and control groups about cervical cancer post-intervention was significantly different (F=12.55, p<0.001). The perceived susceptibility score before and after the experiment, for the intervention group, and 29.4 and 28 for the control group, was significantly different (t=2.063, p=0.043). After the program, cancer prevention behavior was significantly different in the intervention group (t=2.646, p=0.010). Conclusions: The results obtained in this study indicate that the cervical cancer preventive program was effective in increasing cervical cancer knowledge, perceived susceptibility, and cancer prevention behavior.

THE BASIC DESIGN AND ANALYSIS OF UNMANNED VEHICLE FOR TH TELE-OPERATION CONTROL (원격주행을 위한 무인 자동차에 관한 기본설계와 성능분석에 관한 연구)

  • 심재흥;윤득선;김민석;김정하
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.139-139
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    • 2000
  • The subject of this paper is the tole operation for unmanned vehicle. The aim is studied in context of motor control system and algorithms for the mid to low level control of tele operation unmanned vehicle described. Modern, vehicle related researches have been implemented about control, chassis, body and safe쇼 but now is to driving comfort, I.T.S. and human factor, etc. As a result of this fact, unmanned vehicle is main research topic over the world but it is still very expensive and unreasonable. A hierarchical approach is studied in context of motor control system and algorithms for the mid to low level control of tele operation unmanned vehicle described. The real time control and monitoring of longitudinal, lateral, Pitching motion is to be solved by system integration and optimization technique. We show the experimental result about fixed brake range test and acceleration test. And all system is to integrated for driving simulator and unmanned vehicle.

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The Comparison Analysis Between Consumers and Dealers' Willingness to Purchase Environmentally Friendly Agricultural Products (친환경농산물에 대한 소비자와 유통업자의 구매의향 비교 분석)

  • Kim, Chung-Sil;Lee, Sang-Ho
    • Korean Journal of Organic Agriculture
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    • v.17 no.3
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    • pp.291-306
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    • 2009
  • The purpose of this study is to analyze the difference between the consumers' willingness to purchase environmentally friendly agricultural products and the distributers. The main results are as follows; First, it appeared with the fact that the reliability of the consumer against environmentally friendly agricultural products is 50% under. So it is important to fully guarantee the certification of environmentally friendly agricultural products. Second, if the traceability and brand-name system were introduced, the consumers and dealers would more likely to purchase environmentally friendly agricultural products more than they are now. Third, it shows a significant result in certification, developing packing-materials and sale and consuming magnification intention by the t-test between consumers and dealers.

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Optimum PVD installation depth for two-way drainage deposit

  • Chai, J.C.;Miura, N.;Kirekawa, T.;Hino, T.
    • Geomechanics and Engineering
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    • v.1 no.3
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    • pp.179-191
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    • 2009
  • For a two-way drainage deposit under a surcharge load, it is possible to leave a layer adjacent to the bottom drainage boundary without prefabricated vertical drain (PVD) improvement and achieve approximately the same degree of consolidation as a fully penetrated case. This depth is designated as an optimum PVD installation depth. Further, for a two-way drainage deposit under vacuum pressure, if the PVDs are fully penetrated through the deposit, the vacuum pressure will leak through the bottom drainage boundary. In this case, the PVDs have to be partially penetrated, and there is an optimum installation depth. The equations for calculating these optimum installation depths are presented, and the usefulness of the equations is studied by using finite element analysis as well as laboratory model test results.

Study on the Yield Locus of Aluminum alloy sheet Using Biaxial Cruciform Specimens (2축 십자형 시편을 이용한 알루미늄 합금 판재의 항복곡면에 대한 연구)

  • Shin, H.D.;Park, J.G.;Park, C.D.;Ro, H.C.;Youn, K.T.;Lim, H.T.;Kim, Y.S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2009.05a
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    • pp.164-167
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    • 2009
  • The applications of the aluminum alloy sheets to the auto-body panels are dramatically increasing for weight reduction of the automobiles. However, low formability of the aluminum alloy sheet compare to the steel sheet can be obstacles in tool manufacturing process. Therefore, much of yield criteria for the anisotropic material such as the aluminum alloy sheet have been observed. In this study, the biaxial tensile test and FLD test for the aluminum alloy sheet are performed. The results are compared with Hill's 1948 and Hill's 1990 model by means of theoretical predictions. Finite element analysis also performed using the proposed method for the real panel.

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The Study on Axisymmetric Deformation of Thin Orthotropic Composite Pressure Vessel (직교이방성 복합재료로 만든 두께가 얇은 압력용기의 변형에 관한 연구)

  • 김형원;최용규
    • Journal of the Korean Society of Propulsion Engineers
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    • v.7 no.2
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    • pp.36-43
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    • 2003
  • The analytic solution of radial displacements of thin cylindrical pressure vessel with carbon fiber T700/Epoxy orthotropic composites was obtained using equilibrium equations of the orthogonal curvilinear coordinate system. The governing equations with the simplified strain versus displacement relation of 3-dimensional curvilinear coordinate system were derived from the variational principle and the virtual work principle. Some theoretical analyses were presented and compared with the results of hydraulic tests for the pressure vessels with some various thicknesses. The results of the theoretical analysis and the hydraulic test were reasonably matched.

Experimental Research on Basic design and protection of High-$T_c$ Heater Triggered Switch in Liquid Helium

  • Kim, Young-Jae;Yang, Seong-Eun;Park, Dong-Keun;Chang, Ki-Sung;Na, Jin-Bae;Yoon, Yong-Soo;Ko, Tae-Kuk
    • Progress in Superconductivity and Cryogenics
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    • v.10 no.4
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    • pp.13-17
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    • 2008
  • This paper presents experimental and characteristic analysis of hgh-$T_c$ eater-triggered witch using coated conductor (CC) in liquid and gas helium. The high temperature superconducting insert coil which can be installed in a low temperature superconducting (LTS) magnet has been proposed and researched to generate higher magnetic field for MR. Since CC could be an attractive option for HTS insert, it is important to research he characteristics of heater-triggered switch employing CC. We performed the heater test and constructed simulation model using finite element method (FEM.) We performed a protection test and observed normal zone propagation (NZP) signals to evaluate the witch with protection of magnet.

Wind loads on T-shaped and inclined free-standing walls

  • Geurts, Chris;van Bentum, Carine
    • Wind and Structures
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    • v.13 no.1
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    • pp.83-94
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    • 2010
  • Wind tunnel measurements on T-shaped free-standing walls and inclined free-standing walls have been carried out. Mean net pressure coefficients have been derived and compared with previous research. It was observed that the high loads at the free ends are differently distributed than those derived from the pressure coefficients for free-standing walls in EN 1991-1-4. In addition net pressure coefficients based on extreme value analysis have been obtained. The lack of correlation of the wind induced pressures at windward and leeward side result in lower values for the net pressure coefficients when based on extreme value analysis. The results of this wind tunnel study have been included in Dutch guidelines for noise barriers.

Application of Failure Criteria in Aluminum Sheet Forming Analysis (알루미늄 판재 성형해석 시 파단 모델 적용)

  • Kim, Ki-Jung;Nguyen, Ngoc-Trung;Kim, Dae-Young;Kim, Heon-Young
    • Transactions of Materials Processing
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    • v.20 no.2
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    • pp.167-172
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    • 2011
  • The numerical simulation of the Forming Limit Diagram(FLD) test was carried out to calculate the limiting dome height(LDH: ISO12004-2) for aluminum alloy sheet Al6061-T6. The finite element analysis was used as an effective method for evaluating formability and diagnosing possible production problems in sheet stamping operations. To predict fracture during the stamping process, several failure models such as Cockcroft-Latham, Rice-Tracey, Brozzo and ESI-Wilkins-Kamoulakos(EWK) criteria were applied. The predicted results were discussed and compared with the experiments for Al6061-T6.

Analysis of RC girder bridges using orthotropic plate elements (직교이방성판요소를 사용한 철근콘크리트거더교량의 해석)

  • Oh Byung Hwan;Park Jong Bum;Kim Se Hoon;Kim Ji Sang
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.05a
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    • pp.552-555
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    • 2004
  • For the estimation of the load effects of the slab-an-girder type structures, the applicability of FEM analysis for RC T-type girder bridges using orthotropic plate elements has been studied in the present study. The present study indicates that the analysis by orthotropic plate elements for RC T-type girder bridges gives reasonable results for sectional force, including moments and shear. The results from the present method gives the values in between full composite and non-composite cases, which are reasonable when compared with actual test results.

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