• Journal of Information Technology Applications and Management
• /
• 제11권1호
• /
• pp.117-135
• /
• 2004

Since human decision making behavior is likely to follow nonlinear strategy, it is conjectured that the human decision making behavior can be modeled better by nonlinear models than by linear models. All that linear models can do is to approximate rather than model the decision behavior. This study attempts to test this conjecture by analyzing human decision making behavior and combining the results of the analysis with predictive performance of both linear models and nonlinear models. In this way, this study can examine the relationship between the predictive performance of models and the existence of valid nonlinear strategy in decision making behavior. This study finds that the existence of nonlinear strategy in decision making behavior is highly correlated with the validity of the decision (or the human experts). The second finding concerns the significant correlations between the model performance and the existence of valid nonlinear strategy which is detected by Lens Model. The third finding is that as stronger the valid nonlinear strategy becomes, the better nonlinear models predict significantly than linear models. The results of this study bring an important concept, validity of nonlinear strategy, to modeling human experts. The inclusion of the concept indicates that the prior analysis of human judgement may lead to the selection of proper modeling algorithm. In addition, lens Model Analysis is proved to be useful in examining the valid nonlinearity in human decision behavior.

• Nuclear Engineering and Technology
• /
• 제52권1호
• /
• pp.87-100
• /
• 2020

Performance shaping factors (PSFs) in a human reliability analysis (HRA) are one that may influence human performance in a task. Most currently applicable HRA methods for nuclear power plants (NPPs) use PSFs to highlight human error contributors and to adjust basic human error probabilities (HEPs) that assume nominal conditions of NPPs. Thus far, the effects of PSFs have been treated independently. However, many studies in the fields of psychology and human factors revealed that there may be relationships between PSFs. Therefore, the inter-relationships between PSFs need to be studied to better reflect their effects on operator errors. This study investigates these inter-relationships using two data sources and also suggests a context-based approach to treat the inter-relationships between PSFs. Correlation and factor analyses are performed to investigate the relationship between PSFs. The data sources are event reports of unexpected reactor trips in Korea and an experiment conducted in a simulator featuring a digital control room. Thereafter, context-based approaches based on the result of factor analysis are suggested and the feasibility of the grouped PSFs being treated as a new factor to estimate HEPs is examined using the experimental data.

• 운동영양학회지
• /
• 제25권1호
• /
• pp.7-15
• /
• 2021

[Purpose] Sodium bicarbonate shows ergogenic potential in physical exercise and sports activities, although there is no strong evidence which performance markers show the greatest benefit from this supplement. This study evaluated the effects of sodium bicarbonate supplementation on time trial performance and time to exhaustion in athletes and sports practitioners. [Methods] A systematic review was conducted using three databases, including 17 clinical trials. Among these clinical trials, 11 were considered eligible for the meta-analysis according to the criteria for the assessment of methodological quality using the PEDro Scale. Time to exhaustion was assessed in six studies, while time trial performance was evaluated in five studies. [Results] A significant beneficial effect of supplementation on time to exhaustion was found in a random effects model (1.48; 95% confidence interval [CI], 0.49 to 2.48). There was no significant effect of supplementation on time trial performance in a fixed effects model (slope = -0.75; 95% CI, -2.04 to 0.55) relative to a placebo group. [Conclusion] Sodium bicarbonate has the potential to improve sports performance in general, especially in terms of time to exhaustion.

• 대한안전경영과학회지
• /
• 제9권4호
• /
• pp.49-56
• /
• 2007

It is known that human factors account for 80 percent of all railway accidents. To reduce human errors must be the most efficient shortcut to railway safety. For public transportation employees like railway, the more delicate safety management should be executed in individual level. However, there are rarely efforts to improve safety performance of workers who are the subject operating the railway system. This paper develops a hierarchy model to evaluate the human safety performance in railway industry. To evaluate the model, AHP (Analytic Hierarchy Process) methodology is adopted. The hierarchy model is composed of four levels which are objective, two criteria, specific factors of criteria, and rating scales. In addition, since employees for evaluation are over 10, the pairwise comparisons for rating scales are carried out by the absolute measurement. We explore the applicability of AHP to the performance evaluation of railway safety workers by an example and also investigate the changes of alternatives that are railway employees according to the changes of human characteristic which is one of criteria.

• 품질경영학회지
• /
• 제41권4호
• /
• pp.513-525
• /
• 2013

Purpose: The purpose of this paper are to propose a strategic map for hotel industry through analyzing the relationship between service resource, operational capabilities, and performance. Methods: A phone survey was conducted among Korean hotels, and 102 data sets were collected. Measurement items are assessed using both cognitive and objective scales. Results: As results, 'superior group', which is superior in both physical resources and human resources, is excellent in all capabilities and also in room occupancy rate. On the other hands, 'inferior group', which is inferior in both physical resources and human resources, shows lower achievements is in most areas except speed. In addition, physical superior group is better than human superior group in most capabilities except speed, but human superior group shows better results than physical superior group in both room occupancy rate and customer satisfaction. Conclusions: Through the empirical analysis, the conclusions attained are as follows; First, human resources affect customer satisfaction more directly that physical resources. Second, the balancing between physical resources and human resources has an importance to improve operational capabilities.

• 제어로봇시스템학회논문지
• /
• 제20권3호
• /
• pp.364-371
• /
• 2014

The purpose of this paper is to review recent developments in lower limb exoskeletons. The exoskeleton system is a human-robot cooperation system that enhances the performance of the wearer in various environments while the human operator is in charge of the position control, contextual perception, and motion signal generation through the robot's artificial intelligence. This system is in the form of a mechanical structure that is combined to the exterior of a human body to improve the muscular power of the wearer. This paper is followed by an overview of the development history of exoskeleton systems and their three main applications in military/industrial field, medical/rehabilitation field and social welfare field. Besides the key technologies in exoskeleton systems, the research is presented from several viewpoints of the exoskeleton mechanism, human-robot interface and human-robot cooperation control.

• 간호행정학회지
• /
• 제6권1호
• /
• pp.31-54
• /
• 2000

This study was aimed for effective nursing performance of the nurse to be able dedicate to the development of professional nursing work by understanding correlation between the leadership style of head nurse and the nursing performance of the nurse. The materials have been collected through structured questionnaires for 18 days from Feb. 2, 1999 to Feb. 20 from 234 nurses presently working at 4 hospitals Circumstances aptitude theory of Fleishman (1973) were used as the device of measuring leadership style, and staff nurses nursing performance were done by head nurses utilizing questionnaire adopted from Park. Data was analyzed by frequency, mean, ANOVA, ANCOVA, and Pearson's correlation coefficiency by using SPSS program. The results are as follows ; 1. Head nurse leadership was classified in the following manner : duty and human relationships oriented style of head nurse leadership(3.76), human relationship oriented style(3.30), duty leadership oriented style(3.12), and non-interference leadership style(2.77). Duty and human relationships showed highest score in this category. 2. The mean of nursing performance was 3.66, dependent nursing duty was 3.88, interpersonal relationship 3.78, and independent nursing was 3.34. 3. An education course of nursing performance by general characteristics was statistically significant. Job satisfaction, for seen working periods, and motivation for choosing a nursing job of nursing job characteristics was statistically siginficant. 4. As the degree of independence nursing performance increases, the degree and of dependance and interpersonal relationship of nursing performance increases. 5. The relationship between nurse leadership style and nursing performance were statistically different. The degree of duty and human relationship style of the head nurse were highest in dependent and independent nursing performance. Therefore, it is desirable that the head nurse should demonstrate the leadership style high in the duty and human relationships for effective nursing performance.

• 한국콘텐츠학회논문지
• /
• 제16권11호
• /
• pp.271-280
• /
• 2016

본 연구는 장애인거주시설 인권의 중요도 인식과 현재 실행도와의 차이를 비교하여 이러한 차이를 극복할 수 있는 실천전략을 탐색하기 위한 것이다. 이를 위해 경기, 경북, 전남지역 시설장 114명을 대상으로 장애인거주시설 인권의 인식 수준과 실행수준은 어느 정도인지, 중요도 인식과 현재 실행도 간의 차이가 존재하는지에 대한 경험적 연구를 수행하였다. 연구결과 첫째, 거주시설 인권이 중요하다는 인식을 공유하고 있다는 것으로 나타났다. 둘째, 거주시설 인권영역의 중요도와 실행도 수준의 차이분석에서 통계적으로 유의미한 차이가 있는 것으로 나타났다. 셋째, 중요도와 실행도의 차이를 극복할 수 있는 실천전략을 수립하고자 IPA matrix 분석결과를 제시하였다. 이러한 결과를 바탕으로 실천적 함의와 향후 과제를 제시하였다.

• 문화기술의 융합
• /
• 제8권2호
• /
• pp.23-28
• /
• 2022

본 논문은 우리나라 기업들의 성과에 대한 기업들의 고용, 인적자원개발, 노사관행의 시행이 미치는 영향력에 대하여 분석하였다. 분석을 위한 자료는 한국노동연구원(KLI)의 2017년 7회차 사업체패널 조사로 수집된 2,868개 기업에 대한 자료를 활용하였다. 기업의 성과는 전년도 영업이익을 대상으로 하였다. 고용은 신입사원의 공개채용여부, NCS직무능력에 대한 평가여부, 핵심인력 확보 프로그램 실행여부를 포함하였다. 인적자원개발은 재직자 훈련 실시여부, 직무능력향상도 평가여부, 저성과자 관리프로그램 시행 여부, 근로자 경력계획 여부, HRD에 직무분석 활용여부로 구성하였다. 노사관행에는 육아휴직 보장, 출산휴가에 대한 보장과 보육시설 지원 여부를 포함하였다. 분석방법은 영업이익의 흑자 및 적자 기업의 두 집단에 대한 이항 로지스틱 회귀분석을 사용하였다. 분석결과 기업의 성과에 대해 고용, 인적자원개발, 노사관행의 영향력을 확인할 수 있었으며, 기업 차원에서 성과를 높이기 위한 고용 및 인적자원 개발, 노사관행 관리의 시사점을 논의하였다.

• 한국생활과학회지
• /
• 제12권5호
• /
• pp.595-604
• /
• 2003

This study was designed to investigate the difference in the autonomous supervision and role performance according to the socio-demographic factors of the teachers. Also, the relation of the autonomous supervision and the role performance was examined. This research was conducted using the questionnaire to 394 teachers of national, public, and private kindergarten in Chung-buk province. Data were analyzed with the SPSSWIN program by the frequency, percentage, t-test, ANOVA, Scheffe post-hoc test and Pearson's correlation analysis. The results were summarized as follows: First, levels of autonomous supervision of kindergarten teachers were high in general and there were significant differences according to the institution, age, scholastic ability, and the career. The accomplishment in the public kindergarten was higher than that in the private one. Moreover, the higher the teacher's age, career, and scholastic ability, the higher the accomplishment. Second, levels of role performance of the kindergarten teachers were excellent, but the levels of role performance were higher in the public kindergarten than in the private one because the public teachers who did not transfer much had more chances of continuous education and higher responsibility. The role performance of teachers was found to be relatively higher in the kindergarten in countries than in cities because there were more public kindergartens than private ones in countries. Third, there were significant correlations between the lower factors of autonomous supervision and the role performance of the kindergarten teachers. Because the various types of the autonomous supervision can help the teacher's role performance, various types of the autonomous supervision which fit the developmental stages of the teachers will be desirable.