• 제목/요약/키워드: experimental evaluation

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자율실습교육에서 스마트폰 동영상을 활용한 자가평가 학습법이 간호술기 수행능력, 자율실습만족도, 학습동기에 미치는 효과: 유치도뇨를 중심으로 (Effects of Self-evaluation using Smartphone Recording on Nursing Students' Competency in Nursing Skills, Satisfaction, and Learning Motivations: Focusing on Foley Catheterization)

  • 장은화;박수현
    • 기본간호학회지
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    • 제24권2호
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    • pp.118-127
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    • 2017
  • Purpose: The purpose of this study was to identify effects of self-evaluation using smartphone recording on competency in nursing skills, satisfaction and learning motivations in nursing students'. The setting was the open laboratory hours. Methods: A quasi-experimental pre/post-test design was conducted in September 2015. The participants were 82 sophomore nursing students from one University. The experimental group did self-evaluation by watching recorded video clips of their performance. The control group did not have any self-evaluation. The primary outcomes were scores from the foley catheterization checklist, scores from a student satisfaction tool, and scores from a learning motivation tool. Data were analyzed using ${\chi}^2$ test, Fisher's exact test, independent t-test, and paired t-test. Results: There was a significant higher mean score in levels of satisfaction by students in the experimental group compared to the control group (t=2.26, p=.027). In addition, improvement in communication skills by the experimental group was significantly higher than improvement in the control group (t=3.96, p<.001). Conclusion: Findings show that self-evaluation using smartphone recordings has positive effects on increasing both communication skills and satisfaction with practice during open laboratory hours. These results indicate that, self-evaluation using smartphone recording is useful as a supplement to traditional open laboratory education.

High Throughput 프로세스에서 품질혁신의 성능평가를 위한 Z-Factor의 적용방안 (Implementation of Z-Factor Statistics for Performance Evaluation of Quality Innovation in the High Throughput Process)

  • 최성운
    • 대한안전경영과학회지
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    • 제15권1호
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    • pp.293-301
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    • 2013
  • The purpose of this study is to introduce the limit of previously used six sigma quality process evaluation metrics, $Z_{st}$ and $P_{pk}$, and a solution to overcome this drawback by using a metric based on performance evaluation of Z-factor quality innovation. Case analysis on projects from national six sigma contest from 2011 to 2012 is performed and literature review on new drug development HTS (High Throughput Screening) is used to propose innovative performance evaluation metrics. This research shows that experimental study on six sigma evaluation metric, $Z_{st}$ and $P_{pk}$, have no significance difference between industrial type (Manufacturing, Semi-Public Institute, Public Institute) and CTQ type (Product Technology Type CTQ, Process Technology Type CTQ). Following discovery characterize this quality improvement as fixed target type project. As newly developed moving target type of quality innovation performance metric Z-Factor is used for evaluating experimental study, hypothetical analysis suggests that $Z_{st}$ and $P_{pk}$ share different relationship or even show reciprocal relationship. Constraints of the study are relatively small sample size of only 37 projects from past 2 years and conflict on having interview and communication with six sigma quality practitioner for qualitative experimental study. Both moving target type six sigma innovation project and fixed target type improvement project or quality circle enables efficient ways for a better understanding and quality practitioner use by applying quality innovation performance metric. Downside of fixed target type quality performance evaluation metric, $Z_{st}$ and $P_{pk}$, is presented through experimental study. In contrast, advantage of this study is that high throughput requiring product technology, process technology and quantum leap typed innovation effect is evaluated based on precision and accuracy and Z-Factor that enables relative comparison between enterprises is proposed and implemented.

간질 아동의 자기효능 증진 프로그램의 개발 및 평가 (Development and Evaluation of the Empowering A Self-Efficacy (EASE) Program for Children with Epilepsy)

  • 유하나;김희순
    • 대한간호학회지
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    • 제45권1호
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    • pp.54-63
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    • 2015
  • Purpose: The purpose of this study was to verify effects of the Empowering A Self-Efficacy (EASE) program on self-efficacy, self-management, and child attitude toward illness in children with epilepsy. Methods: This was a quasi-experimental study with a non-equivalent control group pre-post test design. Participants were 10 to 15 year old children with epilepsy (11 in the experimental group and 10 in the control group) who were registered at one hospital in S city. The experimental group received the EASE program for 3 weeks. In the first week, a group meeting lasting 570 minutes was conducted on a single day. Over the next two weeks, telephone counselling was conducted twice a week. Data were analyzed using SPSS 18.0. Results: There was a significant difference of pre-post evaluation of the epilepsy self-management scores in the experimental group. However, differences between the experimental group and the control group for seizure self-efficacy and child attitude toward illness were not significant. Conclusion: This is the first study in Korea to develop and evaluate an intervention program for children with epilepsy. Further studies are needed to confirm the effects of the EASE program.

Robust Stability eEaluation of Multi-loop Control Systems Based on Experimental Data of Frequency Response

  • Chen, Hong;Okuyama, Yoshifumi;Takemori, Fumiaki
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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    • pp.360-363
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    • 1995
  • In this paper, we describe the composition of frequency response bands based on experimental data of plants (controlled systems) with uncertainty and nonlinearity, and the robust stability evaluation of feedback control systems. Analysis and design of control systems using the upper and lower bounds of such experimental data would be effective as a practicable method which is not heavily dependent upon mathematical models such as the transfer function. First, we present a method to composite gain characteristic bands of frequency response of cascade connected plants with uncertainty and a recurrent inequality for the composition. Next, evaluation methods of the robust stability of multi-loop control systems obtained through feedback from the output terminals and multi-loop control systems obtained through feedback into the input terminals are described. In actual control systems, experimental data of frequency responses often depends on the amplitude of input. Therefore, we present the evaluation method of the nominal value and the width of the frequency response band in such a case, and finally give numerical examples based on virtual experimental data.

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연속누출을 가지는 액체 풀 확산 모델의 실험적 평가 (Experimentally Evaluation of a Liquid Pool Spreading Model with Continuous Release)

  • 김태훈;도규형;김명배;한용식;최병일
    • 한국수소및신에너지학회논문집
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    • 제26권6호
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    • pp.659-665
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    • 2015
  • In this study, an experimental investigation is performed for evaluation of a liquid pool spreading model with continuous release. The model considered in this study was developed based on a concept which means that the liquid pool spreading is governed by a balance between an inertia force from gravity and a frictional force from friction with the ground under the whole base of the liquid pool. For evaluation of the model, experimental study is performed. Experimental apparatus is setup for measuring release rate, spreading velocity, and evaporation rate from a liquid pool. The experimental results are compared with results from the model. By applying release and evaporation rates obtained from experiments to solving the model, liquid pool radius variation according to time can be obtained. For evaluation of an effect of friction force in the spreading model, results obtained from the models with and without the friction force are compared with those obtained from the experiments. As a result, it is shown that there exists a large deviation between the results obtained from the model without the friction force and the experimental results. On the other hand, the tendency of liquid pool radius variation according to time is similar between the results obtained from the model without the friction force and the experimental results.

AHP와 Conjoint Analysis간의 통합에 의한 인터페이스 사용성 평가 방법 개발 (Development of the Interface Usability Evaluation Technique Using Integration of AHP and Conjoint Analysis)

  • 문형돈;박범
    • 대한인간공학회:학술대회논문집
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    • 대한인간공학회 1998년도 춘계학술대회논문집
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    • pp.93-98
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    • 1998
  • Recently, consumers are tend to purchase the user-centered designed product using interface enginnering and human factors techniques. Therefore, it is important that the designer's requirements should be analyzed focused on the human machine interface. This paper described the interface usability evaluation technique(suvjective evaluation) for the interface between user and product. This methodology is the integrated interface usbility evaluation method AHP and Conjoint Analysis. AHP(Analytic Hierarchy Process) is a multicriteria decision model to give priority after expressing hierarchically for decision making problem. Conjoint Analysis enduavors to unravel the value, or partworths, that consumers place on the product or service's attributes from experimental subjects' evluation of profiles based on hypothetical products or services. A new usability test methodology proposed by this paper includes techniques jointed both consistency test by AHP and experimental subjective evaluation of profiles by Conjoint Analysis for evaluating the user's emotion and impression.

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Analysis of decimation techniques to improve computational efficiency of a frequency-domain evaluation approach for real-time hybrid simulation

  • Guo, Tong;Xu, Weijie;Chen, Cheng
    • Smart Structures and Systems
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    • 제14권6호
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    • pp.1197-1220
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    • 2014
  • Accurate actuator tracking is critical to achieve reliable real-time hybrid simulation results for earthquake engineering research. The frequency-domain evaluation approach provides an innovative way for more quantitative post-simulation evaluation of actuator tracking errors compared with existing time domain based techniques. Utilizing the Fast Fourier Transform the approach analyzes the actuator error in terms of amplitude and phrase errors. Existing application of the approach requires using the complete length of the experimental data. To improve the computational efficiency, two techniques including data decimation and frequency decimation are analyzed to reduce the amount of data involved in the frequency-domain evaluation. The presented study aims to enhance the computational efficiency of the approach in order to utilize it for future on-line actuator tracking evaluation. Both computational simulation and laboratory experimental results are analyzed and recommendations on the two decimation factors are provided based on the findings from this study.

Computational evaluation of wind loads on buildings: a review

  • Dagnew, Agerneh K.;Bitsuamlak, Girma T.
    • Wind and Structures
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    • 제16권6호
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    • pp.629-660
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    • 2013
  • This paper reviews the current state-of-the-art in the numerical evaluation of wind loads on buildings. Important aspects of numerical modeling including (i) turbulence modeling, (ii) inflow boundary conditions, (iii) ground surface roughness, (iv) near wall treatments, and (vi) quantification of wind loads using the techniques of computational fluid dynamics (CFD) are summarized. Relative advantages of Large Eddy Simulation (LES) over Reynolds Averaged Navier-Stokes (RANS) and hybrid RANS-LES over LES are discussed based on physical realism and ease of application for wind load evaluation. Overall LES based simulations seem suitable for wind load evaluation. A need for computational wind load validations in comparison with experimental or field data is emphasized. A comparative study among numerical and experimental wind load evaluation on buildings demonstrated generally good agreements on the mean values, but more work is imperative for accurate peak design wind load evaluations. Particularly more research is needed on transient inlet boundaries and near wall modeling related issues.

국가 관련 감정이 소비자들의 구매의도에 미치는 영향: 해외진입방식의 조절효과를 중심으로 (The Effects of Country-Related Affect on Consumers' Purchase Intention: Focusing on the Moderating Roles of Market Entry Modes)

  • 리웨이;오한모
    • 아태비즈니스연구
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    • 제7권1호
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    • pp.59-69
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    • 2016
  • An extensive body of research on the effects of country-of-origin has emerged in the international marketing and business literature streams. Nonetheless, extant studies do not satisfactorily demonstrate whether and how a foreign firm's choice of market entry mode influences consumers' purchase intentions of its product in country-related affect contexts. Using a survey and an experimental design, we aimed to provide evidence of the effects of the choice on consumers' evaluation and attitude of its product in an animosity context and in a national image context. Through the survey, we collected data regarding consumer animosity, national image, product evaluation, and product attitude from 185 university students and tested the hypotheses that consumer animosity and national image have effects on foreign product evaluation and attitude. The results of the survey research show that personal animosity has a negative effect on consumers' evaluation of foreign products and that a country's image regarding economics has positive effects on consumers' attitude toward foreign products as well as consumers' evaluation of foreign products. In the experimental design, we divided subjects into four groups and exposed them to several descriptions of hypothetical purchase situations. Conducting a 2 (market entry modes)${\times}2$ (country-of-origin) ANOVA, we tested the hypothesis that a market entry mode influences foreign product evaluation and attitude. The results of the experimental study reveal that in a high country-related product association (Germany), market entry modes have insignificant effects on foreign product evaluation and attitude. In addition, in a low country-related product association (China), international partnership has more positive effects on foreign product evaluation and attitude than does exporting.

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고속 금형가공센터 구조물의 강성평가에 관한 연구 (A Study on the Static and Dynamic Stiffness Evaluation of a High Speed Mold/Die Machining Center Structure)

  • 최영휴;강영진;차상민;김태형;박보선;최원선
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2003년도 춘계학술대회 논문집
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    • pp.102-106
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    • 2003
  • An experimental modal analysis and dynamic stiffness evaluation of a moving body structure of a high speed machining center are presented in this paper. The natural frequencies and corresponding modes, and dynamic compliance of a moving body structure of high speed machining center are investigated by using F.E.M., hydraulic exciter test, and impulse hammer test. The lowest three natural frequencies were found to be 56.6 Hz, 112.7 Hz, and 142.7 Hz by FEA respectively, while those were 55 Hz, 112 Hz, 131 Hz by experimental analysis. Furthermore, both computed and measured absolute dynamic compliances of the moving body structure in iso-direction showed good agreement especially at the first two mode frequencies. With our experimental data, the dynamic characteristics of the machining center can be exploited to get a new development of structural dynamic design and modification.

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