• Title/Summary/Keyword: physical knowledge

Search Result 1,396, Processing Time 0.028 seconds

Performance-Based Reliability Measures for Gracely Degrading Systems: the Concept (성능이 서서히 저하되는 시스템의 신뢰도 척도)

  • Kim, Yon-Soo;Park, Sang-Min
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.17 no.32
    • /
    • pp.227-232
    • /
    • 1994
  • In the performance domain, physical performance is a measure that represents some degree of system, subsystem, component or device success in a continuous sense, as opposed to a classical binomial sense (success or failure). If applicable sensing and monitoring means exist, physical performance can be observed over time, along with explanatory variables or covariables. Performance-based reliability represents the probability that performance will remain satisfactory over a finite period of time or usage cycles in the future when a performance critical limit (which represents an appropriate definition of failure in terms of performance) is set at a fixed level, based on application requirements. In the case of inadequate knowledge of the failure mechanics, this physical based empirical modeling concept along with performance degradation knowledge can serve as an important analysis tool in reliability work in product and process improvement.

  • PDF

Quantum Sensing Research: A Scientometric Assessment of Global Publications during 1991-2020

  • Gupta, Brij Mohan;Dhawan, Surinder Mohan;Mamdapur, Ghouse Modin
    • International Journal of Knowledge Content Development & Technology
    • /
    • v.12 no.3
    • /
    • pp.31-49
    • /
    • 2022
  • The study presents a global research scenario in the domain of quantum sensing in quantitative and qualitative terms. The study is based on an analysis of 588 global publications in the field, sourced from the Scopus database for the period 1991-2020. The study identified key countries, organizations and authors, network collaborative linkages at national, institutional, and author level. In addition, it identified broad subject areas intersecting quantum sensing research, key journals for research communications, and broad characteristics of highly-cited papers. The study finds that the USA and Germany lead the world ranking in quantum sensing research with a combined share of 50% to the global output. The USA, Germany, and Italy are the home countries to 13 of the top 15 most productive organizations, and also the home countries to 14 of the top 15 most productive authors in the subject. The top journals publishing most research publications are Physical Review A, Physical Review Letters and New Journal of Physics. However, in the most cited journals list in the subject, Agriculture & Forest Meterology, Science and Physical Review A tops the list.

The Study of the use of Cosmetics and Skin Care of Middle-aged Women in Young-nam Province (영남 지역 중년여성의 화장품 사용 및 피부관리 실태 파악 연구)

  • Jeong, Min-Kyeong;Yoo, Wang-Keun
    • Journal of the Korean Society of Fashion and Beauty
    • /
    • v.1 no.1 s.1
    • /
    • pp.49-64
    • /
    • 2003
  • A study on skin care of middle-aged women was conducted to develop proper skin care program. The study was performed from January 25, 2003 through March 24, 2003 by using questionnaires. The subjects were 380 from some area in Youngnam province. All subjects were females from 40 to 59 years. The results of this study are summarized as follows. 1. According to general characteristics of the subjects, 36.8% of them was from 40 to 44years old; 61.3% 'high school graduate' ; 61.1% 'housewife';89.2% 'married' ;76.1% 'middle class' ;55.8% 'living in small or medium sized city'. In the case of physical health conditions, 55.8% of the respondents was in good health and 63.9% answered that their face skins were healthy. Those who don't drink were 54.5%, and those who don't smoking were 92.9%. 2. In case of the knowledge level of skin care, it showed significant difference in the variables of education, occupation, and economic status. According to the knowledge level of skin care by physical health conditions, it was highest in the case of physically healthy respondents(7.77 point). Those who do not smoke marked higher knowledge level of skin care than those who smoke. Those who exercise also marked higher knowledge level of skin care, than those who don't exercise. 3. 86.8% of the subjects experienced the massage at home. It showed significant difference in the variable of education and place of residence. The knowledge and habit of skin care of middle-aged women showed significant difference according to the variable of education, economic status, and place of residence. Therefore, related professionals and organizations relating to the skin care must make efforts to develop education program for effective skin care for middle-aged women in order to enhance the knowledge level of skin care and information about skin health.

  • PDF

The Effect of Feedback on Somesthetic Video Game Training for Improving Balance of Stroke Patients (뇌졸중 환자의 균형 증진을 위한 체감형 전자게임 훈련에 적용되는 되먹임 방식에 따른 효과)

  • Ahn, Myung-Hwan;Park, Ki-Dong;You, Young-Youl
    • Journal of the Korean Society of Physical Medicine
    • /
    • v.7 no.4
    • /
    • pp.401-409
    • /
    • 2012
  • PURPOSE: The purpose of this study is to assess the difference in the effect of provision of feedback on knowledge of performance and knowledge of result in the training using somesthetic video game aimed at enhancement of balance of hemiparalysis patients due to stroke. METHODS: 20 stroke patients participated in the study. The participants were randomly divided into 2 groups, namely, the knowledge of performance feedback group (KP group, n=10) and the knowledge of result feedback group (KR group, n=10). Both groups received somesthetic video game training 5 times (30 minutes each) a week for total of 4 weeks. The KP group received feedback on the patterns of movement in execution of somesthetic video game. The KR group received feedback on the scores acquired following execution of somesthetic video game. Verification of the significance of the data was performed through paired t-test and independent t-test. RESULTS: Both groups displayed significant reduction in the movement of center of pressure (COP) and Timed up and Go (TUG), and significant increase in the Berg Balance Scale (BBS) following the training. Although the movement of COP was reduced for the KP group in comparison to the KR group, it was not statistically significant, and there was significant reduction in TUG and significant increase in BBS. CONCLUSION: The above results illustrate that provision of feedback on knowledge of performance is more effective than feedback on knowledge of result in somesthetic video game training for the purpose of enhancement of balance in stroke patients. Therefore, provision of feedback on knowledge of performance is necessary in somesthetic video game training for stroke patients.

A Study on Management and Transfer of Knowledge/Information/Technology for Technopoleis Vitalization (과학기술단지 활성화를 위한 지식/정보/기술 관리 및 전파에 관한 연구)

  • Sung, Tae-Kyung
    • Asia pacific journal of information systems
    • /
    • v.10 no.4
    • /
    • pp.57-75
    • /
    • 2000
  • Most current literature on knowledge and technology transfer(Appropriability Model, Dissemination Model, and Knowledge Utilization Model), describe the process of transfer in details, but has limitation in terms of their application in contemporary high-tech industries since most studies have not provided plausible explanation on levels and factors affecting transfer of knowledge and/or technology. To overcome these limitations, the four levels of knowledge and technology transfer are suggested: Knowledge and Technology Creation(Level I), Sharing(Level II), Implementation(Level III), and Commercialization(Level IV). Comprehensive literature identifies sixteen variables affecting the process and results of knowledge and technology transfer. The survey results show four key factors in knowledge and technology transfer: Communication, Distance, Equivocality, and Motivation, Communication refers to the degree to which a medium is able to efficiently and accurately conveys task-relevant information and media while distance involves both physical and cultural proximity. Equivocality refers to the degree of concreteness of knowledge and technology to be transferred while motivation involves incentives for and the recognition of the importance of knowledge and technology transfer activities. Further analysis shows that there are four distinctive clusters and they show very contrasting characteristics in terms of four key factors. The careful mapping of the four clusters on the four key factors show very informative knowledge and technology transfer patterns, the Knowledge and Technology Transfer Grid. Finally, actions to increase communication interactivity and motivation, and to reduce cultural distance and equivocality are suggested.

  • PDF

Effect of Exercise Prescription Program on Adult's Knowledge Related to Health, Attitudes, Behaviors, and Serum Lipoprotein Values (운동처방 프로그램이 성인들의 건강지식 및 태도, 행동과 혈중 지질에 미치는 효과)

  • 김도희
    • Korean Journal of Health Education and Promotion
    • /
    • v.16 no.1
    • /
    • pp.127-135
    • /
    • 1999
  • The purpose of this study was to verify the effects of the developed exercise prescription program by utilizing PRECEDE(Predisposing, Reinforcing, and Enabling Causes in Educational Diagnosis and Evaluation} model on adult's knowledge related to health, attitudes, behaviors and serum lipoprotein values. This study employed 20 males(40-47 yrs) without any apparent physical defects, who did not experience such physical activities. They were divided into experimental groups and control groups, each group consisted of 10 subjects who performed Jogging. The experimental design of the study utilized “two-way ANOVA Design” conducted by the repeated measurement two time(pre and post-test). As the results of the data, the conclusions were as follows: 1. There were statistically significant effects of the health module exposed to the experimental groups on the higher means of knowledge score in the experimental groups than those in the control groups. 2. There were statistically significant effects of the module exposed to the experimental groups on the positive changes of their attitudes. 3. There were significant changes on the behaviors of the health by doing the health program. Therefore the developed health program formed the improved knowledge about the health and the desirable attitudes and behaviors. 4. There were statistically significant effects of the exercise prescription program exposed to the experimental groups on the reduction of the resting heart rate and systolic blood pressure. 5. There were statistically significant effects of the exercise prescription program exposed to the experimental groups on the positive changes of their plasma TC / HDL-C ratio and triglycerides.

  • PDF

Understanding Geographic Variation in Sales Performance through Offline and Online Channels (지역 특수성에 따른 오프라인·온라인 채널 성과의 이해)

  • Kim, Jeeyeon;Choi, Jeonghye;Chung, Yerim
    • Knowledge Management Research
    • /
    • v.17 no.3
    • /
    • pp.45-64
    • /
    • 2016
  • As the digital retail environement becomes prevalent, consumers are given greater opportunities to make purchases across physical and digital boundaries. Prior research emphasizes that the attractiveness of the digital or online channel is relatively determined by spatial specifics of physical locations. The overall market trend combined with prior research suggests that understanding spatial specifics becomes a key to managing both offline and online sales performance together. In this study, we focus on geographic variation in sales performance through offline and online channels and aim to investigate the channel-level sales difference between central and subsidiary areas. To this end, we obtain sales data of skincare and makeup products from a leading cosmetic company. Next, we examine spatial autocorrelations in data and then employ the spatial error models to study the effects of spatial specifics. The empirical findings are as follows. First, there are significant differences in category-specific and channel-level sales between central and subsidiary areas. Second, Moran's I statistics demonstrate the spatial autocorrelations of each variable. Third, spatial error models outperform simple regression models with lower AIC values. Finally, spatial specifics play a greater role in understanding online sales in subsidiary areas whereas they exert greater influence on offline sales in central areas. We believe our study advances the related theory and knowledge of multi-channel retailing and also contributes practically to location-dependent multi-channel strategies and sales data analytics.

The Effects of Obese Program on the BMI, Body Composition, Physical Fitness, Knowledge, Eating Behaviors in Obese Elementary School (비만관리프로그램이 초등학교 비만아동의 비만도, 신체조성, 체력, 지식 및 식행동에 미치는 효과)

  • Kim Young-Hae;Park Nam-Hee;Lee Sun-Mi
    • Child Health Nursing Research
    • /
    • v.10 no.1
    • /
    • pp.14-21
    • /
    • 2004
  • Purpose: The purpose of this study was to identify the effects of the obese program on BMI, body composition, physical fitness, knowledge, eating behaviors among the elementary school obese children. Method: They ranged from the third to sixth grades with over 30% body fat ratio. The subjects consisted of 31 obese children who participated in the obese program and 34 obese who did not participate in the program. The contents of the programs for nine weeks from contained obese education, counseling and exercises once a week. The program lasted from Oct. 8 to Dec. 22, 2001. The Data were analyzed using SPSS program. Result: Flexibility was significantly higher for the program participants than the nonparticipants at the post-test. Agility was significantly higher for the program participants than the nonparticipants at the post-test. Knowledge were significantly higher for the program participants than the nonparticipants at the post-test. Conclusion: This study provides evidence that obese program is effective in changing the flexibility, agility, knowledge in obese elementary children over 9 weeks.

  • PDF

A Path Analysis on Factors Influencing Second Primary Cancer Screening Practices in Stomach, Colon, and Breast Cancer Survivors (암 생존자의 이차암 검진 영향요인에 대한 경로분석: 위암, 대장암, 유방암 생존자 대상으로)

  • Yang, Young Hee
    • Journal of Korean Academy of Nursing
    • /
    • v.44 no.2
    • /
    • pp.139-148
    • /
    • 2014
  • Purpose: This study was conducted to identify the factors influencing second primary cancer (SPC) screening practice by examining the relationships of physical symptoms, knowledge and attitudes regarding SPC screening, perceived risk, primary cancer type, and demographic factors of cancer survivors. Methods: Participants were 308 survivors of stomach, colon, or breast cancer recruited from 2 university hospitals in Korea. Data were collected using a questionnaire and analyzed using IBM SPSS 21.0 and AMOS 18.0. Results: The proportion of participants taking all cancer screenings according to national guidelines was 40%. They had moderate knowledge and a relatively positive attitude regarding SPC screening and high cancer risk perception. The participants had taken fewer SPC screenings after than before cancer diagnosis. The factors influencing cancer risk perception were age, physical symptoms, knowledge regarding SPC and primary cancer type (stomach). The factors influencing SPC screening practice were age, gender, economic status, knowledge regarding SPC screening, and primary cancer types (colon). Conclusion: It is important for clinical professionals to recognize that survivors of cancer are susceptible to another cancer. Education on SPC screening for these survivors should focus on communicating with and encouraging them to have regular cancer screenings.

Everyday Physical Reasoning by Qualitative Reasoning (정성적 추론을 이용한 일상의 자연 현상에 대한 추론)

  • Kim, Hyeon-Kyeong
    • Korean Journal of Cognitive Science
    • /
    • v.16 no.3
    • /
    • pp.213-224
    • /
    • 2005
  • To develop a cognitive system with the flexibility and breadth of human reasoning, it's very important to construct a large scale knowledge base which includes commonsense knowledge as well as expert knowledge. This paper introduces a cognitive system which provides a commonsense reasoning for everyday physical phenomena using qualitative reasoning. It is difficult to apply previous qualitative reasoning to commonsense reasoning since it provides reasoning based on abstract concepts which are apart from everyday real world concepts. Our research provides commonsense reasoning based on sketches and real world concepts by integrating qualitative reasoning and general large scale Cyc knowledge base. Our system has been implemented and tested on various examples.

  • PDF