• 제목/요약/키워드: well test

검색결과 12,448건 처리시간 0.039초

영적 간호가 말기 암환자의 외로움과 영적 안녕에 미치는 효과 (Effects of Spiritual Nursing Care on Loneliness and Spiritual Well-Being of Terminal Cancer Patients)

  • 윤매옥
    • 가정∙방문간호학회지
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    • 제16권1호
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    • pp.31-39
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    • 2009
  • Purpose: This study utilized a non-equivalent control group pre-post design to assess the effects of spiritual nursing care on loneliness and spiritual well-being of terminal cancer patients. Method: Forty-one terminal cancer patients in a general hospital, were divided into an experimental group of 20 patients and a control group of 21 patients. Those in the experimental group received four weeks of treatment three times a week for about 45 minutes each session. The treatment included nurses' spiritual care involving five instruments of spiritual nursing intervention, each of which was used according to the six types of spiritual need assessment. Data was analyzed with descriptive statistics including real number, percentage, $X^2$-test, t-test, and ANCOVA. Result: There were significant differences between the experimental and control groups in the level of loneliness and spiritual well-being. Conclusion: Spiritual nursing care was verified as an effective program that can lessen the loneliness and improve the spiritual well-being of patients with terminal cancer.

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디지털 방사선 투과영상의 식별도 평가 연구 (The Study on Image Sensitivity Evaluation For Digital Radiography Image)

  • 박상기;이영호
    • 동력기계공학회지
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    • 제12권6호
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    • pp.70-77
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    • 2008
  • The purpose of this study is to compare the quality of digital radiography image with that of classical film images for welded structure in power plants. The CMOS(Complementary Metal Oxide Semiconductor) flat panel detecter and Agfa D5 film are used to image flaw specimens respectively. In the test, CMOS flat panel detector has been determined to have a better image than that of film image. In the IQI(Image Quality Indicator) transmission test, one or two more line can be seen in digital image than in film image. Digital Radiography Test enabled to successfully detect all defects on the weld specimens fabricated with real reheat stem pipe and boiler tube as well. In the specific comparison test, Digital radiography test detected micro flaws in the size of 0.5 mm in length by 0.5 mm in depth. However, film test has limited it to 1.0 mm in length by 1.0 mm in depth. As a result of this study, digital radiography technology is estimated well enough to perform the inspection in the industry with far more cost effective way, compared to the classical film test.

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격자 구조물의 비선형 동적 측면 충격해석 (Nonlinear Dynamic Lateral Buckling Behavior of a Grid Structures)

  • 윤경호;송기남;김홍배
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2000년도 춘계학술대회논문집A
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    • pp.254-260
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    • 2000
  • The spacer grid is one of the main structural components in fuel assembly, which supports the fuel rods, guides cooling water, and protects the fuel assembly from the external impact load such as earthquakes. The nonlinear dynamic impact analysis is conducted by using the finite element code ABAQUS/Explicit. Boundary condition for dynamic analysis is well applied to the test condition. Simulation results also similarly predict the local buckling phenomena. In addition to the buckling parameter, the local buckling cause is examined by both simulation and test method. It is found to correspond well with the test results. Impact tests are also carried out for some specimens of the spacer grid in order to compare the results between the test and the simulation. This test is accomplished by a free fall dummy weight onto the specimen. From this test, only the uppermost and lowermost layers of the multi-cell are buckled, which implies the local buckling at the weakest point of the grid structure.

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강합성교각의 내진성능평가 Part II: 유사동적실험 및 잔류내진성능 평가 (Seismic Performance of Concrete-Filled Steel Piers Part II: Pseudo-Dynamic Test and Residual Seismic Capacity)

  • 조창빈;서진환;장승필
    • 한국지진공학회논문집
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    • 제6권2호
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    • pp.21-28
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    • 2002
  • Ductile behavior and strength of concrete-filled steel(CFS) piers was supported by many quasi-static cyclic loading tests. This test method, however, only estimates the member′s deformation capacity under escalating and repetitive displacement and ignores dynamic and random aspects of an earthquake load. Therefore, to understand complete seismic behavior of the structure against an earthquake, dynamic tests such as shaking table test and pseudo-dynamic tests are required as well as quasi-static tests. In this paper, following "Seismic Performance of Concrete-Filled Steel Piers Part I : Quasi-Static Cyclic Loadint Test", the seismic behavior of CFS and steel piers designed for I-Soo overpass in Seoul in investigated by the pseudo-dynamic test. In addition, the residual strength of both piers after an earthquake is estimated by the quasi-static test. The results show that both piers have satisfactory ductility and strength against well-known EI Centro earthquake although the CFS pier has better strength and energy dissipation than the steel pier.

공시체 구속 상태에서 정하중 시험에 의한 SMA 혼합물의 소성변형 저항성평가 가능성 (Feasibility of Estimating Rut Resistance of SMA Mixture by Static Loading Test Using Confined Specimen)

  • 김성운;최창정;김광우
    • 한국농공학회논문집
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    • 제61권3호
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    • pp.43-53
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    • 2019
  • It is well-known fact that the stone-mastic asphalt (SMA) mixture has shown superior rut resistance, compared with the dense-graded asphalt (DGA) mixture in highway pavements. However, the SMA is measured to be inferior to DGA mixes when tested by well-known high-temperature test methods, such as the wheel tracking (WT), asphalt pavement analyzer, the Marshall Stability and Kim Test. Therefore, this study examined the reasons why it was measured to be inferior, and devised a potential procedure by which the superiority of SMA could be measured at $60^{\circ}C$. The strength against deformation ($S_D$), which was known to show very high correlation with WT results for DGA mixes, was measured by the Kim Test on the specimen confined in the compacted mold. In standard Kim Test, which used the specimen without confinement, the DGA was measured to show higher $S_D$ than the SMA. But by confining specimen, it was found that the $S_D$ of SMA was measured to be higher than that of DGA. Therefore, the confined static test protocol devised in this study was found to be feasible for evaluating rut resistance of SMA mix.

방과 후 지역아동센터 이용 아동·청소년의 자아탄력성, 사회적 지지, 주관적 안녕감이 심리적 안녕감에 미치는 영향 (The Effects of Ego-resilience, Social Support and Subjective Well-being on Psychological Well-being of the Children and Adolescents Who Attend a Community Child Center after School)

  • 김정이;박영미;이지현;조은주;장선녀
    • 한국학교보건학회지
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    • 제29권3호
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    • pp.235-244
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    • 2016
  • Purpose: The purpose of this study was to investigate factors effecting the psychological well-being of adolescents who attend a community child center. Methods: The survey was conducted on 143 children attending a community child center in P city with a structured self-report questionnaire from August 20 to September 20, 2016. Data were analyzed through descriptive statistics, t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation coefficient, and stepwise multiple regression, using SPSS/WIN version 18.0. Results: There were significant differences in psychological well-being according to grade, one of the general characteristics of the subjects. There was a significant positive correlation between ego-resilience, social support, subjective well-being, and psychological well-being. From the multiple regression analysis, the most significant factors affecting psychological well-being were subjective well-being (${\beta}=.56$) and grade division (${\beta}=.19$). These variables explained 38.0% of the total variance in psychological well-being. Conclusion: Considering the results of this study, it is desirable to develop measures to increase adolescents' subjective well-being and provide support according to grade in order to improve the psychological well-being of the adolescents attending community children centers.

경량항공기 선형 비행운동모델 변수 추정에 관한 연구 (Study on the Parameter Estimation for Flight Dynamic Linear Model of Light Sport Aircraft)

  • 김응태;성기정
    • 한국항공운항학회지
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    • 제18권4호
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    • pp.21-29
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    • 2010
  • The main purpose of this study is to obtain linear models for the design of automatic flight controller in order to operate the Light Sport Aircraft as unmanned air vehicle. Flight test equipments installed on the aircraft to acquire flight test data are described and maneuvers for practical speed calibration are introduced. Parameters for the linear models of lateral and longitudinal motion are estimated by the Output error method as well as trim data analysis using the flight test data. Simulated data using the estimated parameters is shown to agree well with the measurement data. Estimated parameters obtained for several flight conditions can be used to improve the aerodynamic database of the simulation program.

WCR을 이용한 노상토 함수량의 측정 및 밀도 영향 평가 (Effect of Density on WCR Measurement of Water Content in Subgrade Soils)

  • 이치헌;박성완;정진훈;권순민
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2005년도 춘계 학술발표회 논문집
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    • pp.1199-1204
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    • 2005
  • The purpose of field monitoring system in KHC-Test Road located at Joongbu-Inland Highway, is to provide the performance data for traffic and environmental loadings from pavement surface. Among them, water content reflectometers(WCR) are used to measure the volumetric water content of subgrades soils used in test roads. However, most of the WCRs are not well-calibrated based on the field conditions. In this study, the laboratory based test is performed at various density conditions to evaluate the volumetric water content in subgrade Soils with a WCR. Based on the laboratory testings, the effect of density on WCR measurement are well evaluated for predicting the volumeric water content.of subgrades soils in KHC-Test road.

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자동차 제어기의 내구수명 평가방안 연구 (A Study on the Evaluation Method for Durability Life of Vehicle,s ECU)

  • 김병우;최범진;조현덕;이도희
    • 전기학회논문지
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    • 제57권2호
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    • pp.208-213
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    • 2008
  • In order to assess the reliability of the electronics control unit for vehicles, accelerated life test model and procedure are developed. By using this method, failure mechanism and life distribution are analyzed. The main results are as follows : i) the main failure mechanism is degradation failure that is, junction destruction of a semiconductor resin by high temperature. ii) the life distribution of the electronics control unit for vehicles is fitted well to Weibull life distribution and the accelerated life model of that is fitted well to Arrhenius model. iii) at the result of the life distribution, accelerated life test method is developed, and test time for life assessment will be shortened by 5,000 hours by this test method.

Kullback-Leibler Information of the Equilibrium Distribution Function and its Application to Goodness of Fit Test

  • Park, Sangun;Choi, Dongseok;Jung, Sangah
    • Communications for Statistical Applications and Methods
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    • 제21권2호
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    • pp.125-134
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    • 2014
  • Kullback-Leibler (KL) information is a measure of discrepancy between two probability density functions. However, several nonparametric density function estimators have been considered in estimating KL information because KL information is not well-defined on the empirical distribution function. In this paper, we consider the KL information of the equilibrium distribution function, which is well defined on the empirical distribution function (EDF), and propose an EDF-based goodness of fit test statistic. We evaluate the performance of the proposed test statistic for an exponential distribution with Monte Carlo simulation. We also extend the discussion to the censored case.