• 기본간호학회지
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• 제19권4호
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• pp.434-443
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• 2012

Purpose: This study was conducted to investigate sleep patterns in nursing students as measured by an automated wireless sleep tracker and self-reported sleep scales. Methods: Data were collected from October, 2011 to May, 2012. ZQ (a symbolic number that measures the quality and quantity of sleep) was calculated from the automated wireless sleep tracker. Pittsburgh Sleep Quality Index-Korean version, Sleep scale A, and sleep satisfaction were used as self-report sleep scales. Female nursing college students (n=37) were recruited by convenience sampling. Before going to bed, they were asked to put on a head-band type sleeping sensor and to move it the next morning. Every student slept 2~4 nights with the sleep tracker. Data were collected for 86 (91.4%) of 94 nights' sleep. The students were also requested to fill in the PSQI-K, sleep scale A, and sleep satisfaction. Results: The only statistically significant correlation was between ZQ and sleep satisfaction (r=.869, p=.026). The biggest obstacle in using this device was putting on the head-band type sensor. Conclusion: Validity of the wireless sleep tracker was verified in part. The usefulness of this device in nursing research and practice was identified. Further evaluation need to be conducted with various populations.

• 한국표면공학회지
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• 제34권4호
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• pp.321-326
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• 2001

The TiCrN Coatings haying three kinds of Compositions of $Ti_{36}$ $Cr_{26}$ $N_{38}$ , $Ti_{31}$ $Cr_{35}$ $N_{34}$ / and $Ti_{14}$ $Cr_{52}$ $N_{34}$ were deposited on STD 61 steel substrate by arc ion plating and were oxidized between 700 and 100$0^{\circ}C$ to identify the oxide scales formed on the coatings. The oxide scales were then analyzed using EPMA, XRD and GAXRD. During oxidation, the coatings consisting of TiN and CrN phases were reduced to TiO2 and $Cr_2$$O_3$, respectively. Titania tended to form at the outer oxide layer, whereas chromia tended to form at the inner oxide layer, owing to the different oxygen affinity. The substrate elements as well as coating elements diffused outwardly toward the oxide layer due to the concentration gradient. The growth of oxide from the TiCrN coatings was schematically expressed on the basis of thickness measurement of the reacted and unreacted coatings. The Cr element showed its stronger role to keep the TiCrN coatings from oxidation, when compared with Ni.

• Wind and Structures
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• 제36권6호
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• pp.367-377
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• 2023

This study proposes a few-shot learning model for extrapolating the wind pressure of scaled experiments to full-scale measurements. The proposed ML model can use scaled experimental data and a few full-scale tests to accurately predict the remaining full-scale data points (for new specimens). This model focuses on extrapolating the prediction to different scales while existing approaches are not capable of accurately extrapolating from scaled data to full-scale data in the wind engineering domain. Also, the scaling issue observed in wind tunnel tests can be partially resolved via the proposed approach. The proposed model obtained a low mean-squared error and a high coefficient of determination for the mean and standard deviation wind pressure coefficients of the full-scale dataset. A parametric study is carried out to investigate the influence of the number of selected shots. This technique is the first of its kind as it is the first time an ML model has been used in the wind engineering field to deal with extrapolation in wind performance prediction. With the advantages of the few-shot learning model, physical wind tunnel experiments can be reduced to a great extent. The few-shot learning model yields a robust, efficient, and accurate alternative to extrapolating the prediction performance of structures from various model scales to full-scale.

• 동국한의학연구소논문집
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• 제8권2호
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• pp.25-46
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• 2000

통증은 환자들로 하여금 내원하게 하는 주된 증상중의 하나로, 치료방법의 선택 및 효과 판정을 위해서는 적절한 평가가 필요하다. 통증은 실험적인 방법과 임상적인 방법에 의해 측정될 수 있는데, 통증의 주관적인 성격상 임상적인 방법이 일반적으로 사용된다. 통증의 임상적측정법은 일차원적측정법과 다차원적측정법으로 대별할 수 있는데, 일차원적 측정법으로는 시각적상사척도(Visual Analogue Scale), 구술적평정척도(Verbal Rating Scale), 수치평정척도(Numerical Rating Scale), 통증표정척도(Pain Faces Scale), 그리고 포커칩 도구(Poker Chip Tool)등이 있고, 다차원적 측정법으로는 McGill 동통질문서(McGill Pain Questionnaire), 다면적인성검사(MMPI), 통증행동척도(Pain Behavior Scale), 통증장애지표(Pain Disability Index), 그리고 통증평정척도(Pain Raing Scale)등이 있다. 일차원적 측정법은 주로 환자의 자가통증평가법에 기초하여 통증의 강도를 측정하는데, 측정방법의 단순함과 신속성으로 인해 급성통증을 평가하는데 주로 사용된다. 다차원적인 측정법은 통증의 주관적, 정신적 그리고 행동적인 면을 측정하는데, 측정방법이 포괄적이고 신뢰성이 있어서 만성통증을 측정하는데 사용된다. 환자의 언어와 인지능력은 정확한 통증을 평가하는데 장애가 되는 주된 요인이다. 통증에 따른 행동반응이나 생체반응은 환자의 통증을 완전히 대변하지 못하지만 이러한 상황에 있어 유용한 통증평가지표가 될 수 있다. 통증평가법을 결정할 때에는 먼저 측정하려고 하는 통증의 성격을 고려하여 어떠한 면을 측정할 것인가를 결정해야하며 아울러 환자의 언어와 인지능력을 고려해야 한다. 적절한 평가법의 선택은 환자의 진단과 치료에 있어 유효한 결론에 이르게 하는 중요한 과정이다.

• 음성과학
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• 제7권2호
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• pp.71-81
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• 2000

The present study was performed to find efficient and useful length of voice sample for MDVP analysis, by investigating the correlation between perceptual GRBAS scales and objective MDVP measurements, with the five different lengths of voices of 20 patients with vocal polyp: 0.5, 1.0, 1.5, 2.0, 2.5 seconds. The results are following: (1) 1.5-second sample of MDVP showed the highest correlation between the perceptual judgement and objective measurement, and 1.0-second sample showed the lowest. The difference between the two samples was found in the number of the statistically significant correlated pairs of MDVP parameter-GRBAS scale. (2) The two extreme edges of the lengths, 0.5-second and 2.5 second showed no statistically significant difference.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2006년도 제32회 KOSCO SYMPOSIUM 논문집
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• pp.128-134
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• 2006

A characterization of turbulent reacting flows has proved difficult owing to the complex interaction between turbulence, mixing, and combustion chemistry. There are many types of time scales in turbulent flame which can determine flame structure. This counter jet type premixed burner produces high intensity turbulence. The goal is to gain better insights into the flame structures at high turbulence. 6 propane/air flames gave been studied with high velocity fluctuation in bundle type nozzle and in one hole type nozzle. By measuring velocity fluctuation, turbulent intensity and integral length scale are obtained. And sets of OH LIF images were processed to see flame structure of the mean flame curvatures and flame lengths for comparison with turbulence intensity and turbulent length scales. The results show that the decrease in nozzle size generates smaller flow eddy and mean curvatures of the flame fronts, and a decrease in Damkohler number estimated from flow time scale measurement.

• 대한기계학회논문집B
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• 제22권9호
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• pp.1307-1316
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• 1998

Engine turbulences obtained by LDV measurement near the compression TDC was analyzed by the classic turbulence theory. Turbulences were quantified by a cycle resolved analysis and processed to reveal integral time scale and length scale. Three different definitions were applied to obtain the turbulence time scales and then compared each others. The classic turbulence theory with the several assumptions for engine application proven to be very efficient for understanding engine turbulence in this study. It was found that the integral length scale is strongly affected and increased by tumble flow.

• 대한가정학회지
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• 제45권5호
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• pp.1-13
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• 2007

The purpose of this study was to explore the well-being attitude and use the expectation-disconfirmation model to assess consumer satisfaction with well-being products. The consumer expectations, performance and disconfirmation scales were composed of 7 items of 5-likert scales. Consumer satisfaction with well-being products was measured with one-item-measurement scale. The results of this study are as follows. 1. The well-being attitude consists of 4 factors. : consumption of the well-being products, pursuit of mental well-being, criticism of commercial fashion, and pursuit of harmony with natural life. 2. Well-being attitude influences the consumers' expectation, performance, and satisfaction with well-being products. 3. Consumer expectation for well-being products has no influence on satisfaction, but performance and disconfirmation have a high degree of influence on satisfaction.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.189-199
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• 2008

It is good to use DEA method as it can measure the efficiency without depending on a specific function like cost function. The method also finds out the most efficient group among the sample groups and gives us a specific number. For example, it shows what kind of factor of inefficient group gives how much input and produces how much output. Originally DEA, which was developed by Charnes, Cooper and Rhodes, allows us not only to measure the relative efficiency of Decision Making Units(DMUs) of non-profit organizations whose success cannot be measured by a single bottom-line figure such as profit but also to integrate several variables, which have different measuring scale, into a single model. Therefore we can use physical scales and financial scales simultaneously in the same model without any transformation process. In this study, price and measurable performance indexes of vehicles are used as input and outputs respectively. The purpose of this study is to propose an effective approach for evaluating the relative efficiency of vehicles and to determine the vehicles have high performance efficiency compared to product cost.

• 유통과학연구
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• 제16권4호
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• pp.57-65
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• 2018

Purpose - As society continues to develop and the economy grows, consumer participation in sports activities and consumption of sports-related goods are steadily increasing. Nowadays, Spyder, the sporting goods company has achieved great success in the Korean market. In the launching, Spyder tried to communicate the sport authentic brand value to consumers as successful sporting goods brands did. The purpose of this study is to identify the key factors influencing the successful branding strategies of sporting goods retailers. In the process of value trading to the consumer, the concept of authenticity which includes 'originality', 'truth' and 'genuine' is considered as one of the most important factor for branding. This study tries to define the brand authenticity in sporting goods retailer and to develop measurement scale. This study suggests a new paradigm for sports brand research and implications for management of domestic sporting goods retailer that is losing the direction to develop brand value. Research design, data, and methodology - This research consists of two parts of study. The first study is a qualitative research to define sport brand authenticity and measuring items through expert interviews. The second study is the development of scales to the authenticity. And reliability and validity of the scales are verified by quantitative methods. A total of 500 respondents were surveyed and the statistical tests were conducted by dividing two groups. Results - This study defines the authenticity of sports brand which is divided into four dimensions; behavioral authenticity, performance authenticity, spiritual authenticity and virtuous authenticity. And this newly defined four dimensions measurement tool is proved statistically in this study in terms of reliability and validity. Conclusions - For the success of sporting goods retailers, it is important to understand the value of sport and to communicate it with customers effectively. This study suggests a tool for sport brand authenticity and also significant implications for brand strategies. In addition, every entity which is related with sport can apply the measurement scale of this study to understand their position and find direction in terms of authentic sport value.