• 한국화재소방학회:학술대회논문집
• /
• 한국화재소방학회 2008년도 춘계학술논문발표회 논문집
• /
• pp.159-162
• /
• 2008

A standard fire extinguishing tester, with which we could conduct the fire extinguishing ability rating of a water-based fire extinguishing agent such as water and loaded stream, has been developed in this work. It could help us enhancing the efficiency and reliability of the fire extinguishing test of loaded streams, and at last increasing the productivity of fire protection related firms. Furthermore, our country could take the lead in making a new standard for the fire extinguishing test of loaded streams. As a result, it is expected that loaded streams could be improved by using it. In addition the standard fire extinguishing tester could be made moderately in our industry, and supplied at home and worldwide.

• Journal of Information Technology Applications and Management
• /
• 제13권4호
• /
• pp.273-290
• /
• 2006

This study suggests a frequency matrix technique to predict personal credit rate more efficiently using incomplete data sets. At first this study test on multiple discriminant analysis and logistic regression analysis for predicting personal credit rate with incomplete data sets. Missing values are predicted with mean imputation method and regression imputation method here. An artificial neural network and frequency matrix technique are also tested on their performance in predicting personal credit rating. A data set of 8,234 customers in 2004 on personal credit information of Bank A are collected for the test. The performance of frequency matrix technique is compared with that of other methods. The results from the experiments show that the performance of frequency matrix technique is superior to that of all other models such as MDA-mean, Logit-mean, MDA-regression, Logit-regression, and artificial neural networks.

• Communications for Statistical Applications and Methods
• /
• 제15권6호
• /
• pp.1013-1026
• /
• 2008

신용평가모형의 판별력에 대한 적합성 검정방법으로 콜모고로프-스미르노프(K-S) 통계량이 널리 사용되고 있다. K-S 통계량을 통한 모형의 판별력 판단기준으로는 표본수에 의존하는 K-S 검정통계량의 임계값보다 매우 큰 기준인 $0.3{\sim}0.4$의 수준이 일반적으로 적용된다. 본 논문에서는 모의실험을 통해 일반적 판단기준의 타당성을 살펴보았다. 모의실험 결과 국내에서 개발된 대부분의 신용평가모형의 결과를 바탕으로 구한 K-S 통계량은 현재 적용하고 있는 판단기준보다 큰 값을 갖는다는 것을 발견하였다. 따라서 어떠한 신용평가모형 이라도 좋은 판별력을 갖는다고 해석할 수 있다. 본 연구에서는 표본크기와 불량률 그리고 제II종 오류율에 따른 대안적인 임계값을 제안한다.

• 컴퓨터교육학회논문지
• /
• 제19권3호
• /
• pp.55-66
• /
• 2016

본 연구는 온라인대학 학습자들이 강의평가에서 보여주는 평정성향에 대해 알아보고, 그 평정성향이 강의평가 점수에 미치는 영향을 탐색하였다. 이를 위하여 2015년 1학기에 한 온라인대학의 재학생 1,098명으로부터 인구학적 배경, 학습활동, 평정성향, 강의평가 결과에 대한 자료를 수집하였다. 연구의 주요 결과는 다음과 같다. 첫째, 연구대상자들은 강의평가 참여율과 평정일관성 영역에서 자신만의 뚜렷한 평정성향을 보였다. 참여율이 0%와 100% 등 양극단에 몰려 있었으며, 평가문항 간 평정일관성과 전체 수강과목 간 평정일관성은 상호관련성이 매우 높았다. 둘째, 연구대상자들은 인구학적 배경과 학습활동 정도에 따라 강의평가 참여일과 평정일관성, 강의평가 결과 측면에서 차이를 보였다. 셋째, 연구대상자의 인구학적 배경, 학습활동, 평정일관성은 강의평가 결과에 독립적인 영향력을 행사하였다. 본 연구는 학습자들의 평정성향을 세분화하여 드러냈다는 점과, 강의평가 결과 해석 시 학습자의 평정성향을 고려해야 한다는 것을 제안하였다는 점에서 의의가 있다.

• 수산경영론집
• /
• 제45권3호
• /
• pp.55-69
• /
• 2014

We try to test the pecking order theory of Korean fisheries firm's capital structure using debt capacity. At first, we estimate the debt capacity as the probability of assigning corporate bond rating from credit-rating agencies. We use logit regression model to estimate this probability as a proxy of debt capacity. The major results of this study are as follows. Firstly, we can confirm the fisheries firm's financing behaviour which issues new debt securities for financial deficit. Empirical test of SSM model indicates that the higher probability of assigning corporate bond rating, the higher the coefficient of financial deficit. Especially, high probability group follows this result exactly. Therefore, the pecking order theory of fisheries firm's capital structure applies well for high probability group which means high debt capacity. It also applies for medium and low probability group, but their significances are not good. Secondly, the most of fisheries firms in high probability group issue new debt securities for their financial deficit. Low probability group's fisheries firms also issue new debt securities for their financial deficit within the limit of their debt capacity, but beyond debt capacity they use equity financing for financial deficit. Therefore, the pecking order theory on debt capacity come into existence well in high probability group.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1990년도 하계학술대회 논문집
• /
• pp.304-307
• /
• 1990

Referring to the calculation of the continuous permissible current rating in 22.9kV CN/CV underground distribution power cables, the current and temperature have been fully discussed and analyzed based on their three different values: one is the actually measured value throughout our test and the other two are calculated in connection with different specifications IEC-287 and JCS-168-D respectively. For this purpose, our test has been carried out with real cables which have been under stress either with induced current or with rating voltage. In the former, the calculated current of IEC-287 shows closer value to the measured one than that of JCS-168-D does. In the latter, there has been little difference on the temperature comparing with that measured without voltage application. Therefore, we think that it is preferable to choose the IEC-287 specification for the calculation of the continuous permissible current rating in the commercially power cables.

• 한국실내디자인학회논문집
• /
• 제20권6호
• /
• pp.192-199
• /
• 2011

The purposes of this study are to present the criteria for a sensibility rating scale for measuring the general women's perception of museums' spatial environment, through an empirical analysis; and to clarify the characteristics of the presented rating scale in terms of each rating element and factor. For this study, a survey was conducted during August 19 - September 16, 2010, and a total of 342 museum visitors participated in the survey. A sensibility rating scale used for the survey consisted of a total of 32 adjectives selected from a literature review of previous studies. To specify the dimensions of semantic space using the semantic adjectives, words with opposite meanings were analyzed with the semantic differential technique developed by Osgood et al. Using SPSS, a reliability analysis, factor analysis were conducted on the data obtained from the survey. The results of this study can be summarized as follows: According to the women's perception of museums' spatial environment, six factors were found from the 25 semantic ratings of the Museum. The summarized criteria were: 'aesthetic', 'pleasant', 'valuable', 'function', 'affinity', and 'material.' The derived criteria were verified through an empirical test using emotional adjectives. In the coming years, the results of this study will serve as valuable data for constructing a sensibility rating scale for evaluating spatial environments of museums.

• 품질경영학회지
• /
• 제51권4호
• /
• pp.677-689
• /
• 2023

Purpose: The purpose of this study is to design a x-ray screening rating system to improve X-ray screening ability, which is a core job competency of security screener at Incheon International Airport, and to verify its effectiveness through empirical analysis to suggest ways to improve the level management system. Methods: In this study, the effectiveness of the research model was analyzed using T-test tests for effect analysis based on the empirical analysis results derived through the competency evaluation model, the screening rating system. Results: The results of this study are as follows. The average score for regular education before the implementation of the x-ray screening rating system was 94.1 points, but after the implementation of the x-ray screening rating system, the average score for regular education was 95.5 points, an average of 1.4 points increased. In addition, the proportion of those with 95 or more points classified as high scorers also increased significantly from 51.1% to 69.3%. Conclusion: The X-ray screening rating system of security inspectors will systematically manage the level of screening ability, which is a key job competency, and play a strong role in improving competency, while preventing security accidents through early identification and intensive training of level-lowers.

• 대한인간공학회지
• /
• 제36권5호
• /
• pp.569-578
• /
• 2017

Objective: The purposes of this experiment are an analysis of accuracy between target force level and subjective rating for the Target Force Level and an analysis of the patterns of subjective rating depending on target force level when there is no feedback from males for analysis. Background: The study of perceived exertion about the static contraction is processed with using among the matching procedure method between contralateral limbs, Exertion vs. Borg CR-10 scale and Exertion vs. %MVC (Maximum Voluntary Contraction). However, when there is no feedback, there is lack of the study on whether the subject can distinguish the subjective rating of the force depending on the target force levels. Method: Total 30 males, healthy subjects are measured the maximum grip strength, MVC, and then, each subject is measured the subjective rating and the accuracy with the random target force level (10, 20, 30, 40, 50, 60, 70, 80, and 90% MVC). Results: In the MVC study, males exerted 256.87N (${\pm}51.33$). In the subjective rating of grip strength increased for each Target Force Level (9 levels), higher subjective rating evaluated (p<0.05). In accuracy examination between target force level and subjective rating of grip strength by each %MVC, 10, 30, 40, 50, 70, 90% target force levels showed accurate strength (p>0.05). However, at 20% target force level, the subjects evaluated less subjective rating of grip strength than the target force (Underestimation), and at 60% and 80% target force level, the subjects evaluated more subjective rating of grip strength than the target force (Overestimation) (p<0.05). Conclusion: In the experiment, the MVC showed 256.87N (${\pm}51.33$) for the male adults and as the subjective rating value increased for each Target Force Level (9 levels), higher subjective rating evaluated (p<0.05). Moreover, the results of the accuracy test between target forces and subjective rating of the subjects showed that most participants rated a fairly accurate assessment of subjective rating of grip strength for Target Force Level (9 levels), except for 20%, 60%, and 80%MVC. Application: This experimental result would be used for basic data for the subjective rating of grip strength pattern by the target force level when the voluntary muscle is contracted.

• 동의신경정신과학회지
• /
• 제21권4호
• /
• pp.79-97
• /
• 2010

Objectives : The objective of this study is to investigate the effects of Jajun-maum-dom-movement program on the attention and hyperactivity of middle school students, Methods: Jajun-maum-dom-movement program was applied to 14 middle school students for 8 weeks, To measure the improvement of attention and decrease of hyperactivity, these tests were used - ADHD Diagnostic System(hereinafter ADS), Parent's Abbreviated Conners Rating Scale(hereinafter ACRS), Teacher's Korean ADHD Rating Scale(hereinafter K-ARS). For each variable in the 3 test methods, the results of before and after program were measured and then, the results were assessed by paired t-test, Interrelations between the resulted values of 10 variables were analyzed in these three groups: scores before program, scores after program, and change in scores before and after program, Among 10 variables, for variable showing significant difference by t-test, it was assessed by ANCOVA whether change in scores before and after program is affected by the grade and gender. Results: As for the changed score between before-the-program and after-the-program, in the ADS test, it was found that there is a significant effect in the "commission error" which is one of the indices showing the degree of hyperactivity, and "sensitivity(d')" which is one of the indices showing attention, and it was found that there is a significant effect in ACRS and K -ARSC total), Among the correlations of the 4 variables, "ACRS" and "K-ARSC total) ", which show the comprecessive criteria, have the positive correlation of significance in before-the-program, after-the-program and the changed score between before-the-program and after-the-program, However, there was no specific correlations among sub-variables about attention or hyperactivity, and in all of 4 variables, there was no significant degree of change according to grade or gender. Conclusions : As the results of assessment by ADHD Diagnostic System, Parent's Abbreviated Conners Rating Scale, Teacher's Korean ADHD Rating Scale to study the effects of Jajun-maum-dom-movement program on attention and hyperactivity, it is known that the program is helpful for improvement of attention and decrease of hyperactivity for the participated students.