• Title/Summary/Keyword: Aging Coefficients

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Effect of Water-Cement Ratio and Aging on the Characteristics of Chloride Ions Diffusion in Concrete (물-시멘트비와 재령이 콘크리트의 염소이온 확산특성에 미치는 영향)

  • 배수호;정영수;김진영;하재담;심은철;임병탁
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.05a
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    • pp.737-742
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    • 2002
  • The chief factors for the penetration and diffusion of chloride ions in concrete are water-cement ratio(w/c), aging, thickness of cover concrete, chloride ions concentration of given environment, wet and dry conditions and etc. In this study, effect of w/c and aging on the characteristics of chloride ions diffusion in concrete were researched when environmental factors for the penetration and diffusion of chloride ions were constant. For this purpose, the voltages passing through the diffusion cell were measured by using accelerated test method using potential difference, and then diffusion coefficients of chloride ions by using Andrade's method were estimated for 44%, 49.5% and 55% of w/c, respectively. As a result, correlation among diffusion coefficients of chloride ions, w/c and aging were concluded through multiple regression model.

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A Study on Diagnosis of Transformers Aging Sate Using Wavelet Transform and Neural Network (이산웨이블렛 변환과 신경망을 이용한 변압기 열화상태 진단에 관한 연구)

  • 박재준;송영철;전병훈
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.14 no.1
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    • pp.84-92
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    • 2001
  • In this papers, we proposed the new method in order to diagnosis aging state of transformers. For wavelet transform, Daubechies filter is used, we can obtain wavelet coefficients which is used to extract feature of statistical parameters (maximum value, average value, dispersion skewness, kurtosis) about each acoustic emission signal. Also, these coefficients are used to identify normal and fault signal of internal partial discharge in transformer. As improved method for classification use neural network. Extracted statistical parameters are input into an back-propagation neural network. The number of neurons of hidden layer are obtained through Result of Cross-Validation. The network, after training, can decide whether the test signal is early aging state, alst aging state or normal state. In quantity analysis, capability of proposed method is superior to compared that of classical method.

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Diagnosis of Transform Aging using Discrete Wavelet Analysis and Neural Network (이산 웨이블렛 분석과 신경망을 이용한 변압기 열화의 전단)

  • 박재준;윤만영;오승헌;김진승;김성홍;백관현;송영철;권동진
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.07a
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    • pp.645-650
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    • 2000
  • The discrete wavelet transform is utilized as processing of neural network(NN) to identifying aging state of internal partial discharge in transformer. The discrete wavelet transform is used to produce wavelet coefficients which are used for classification. The mean values of the wavelet coefficients are input into an back-propagation neural network. The networks, after training, can decide if the test signals is aging early state or aging last state, or normal state.

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A Study on Auto-Classification of Acoustic Emission Signals Using Wavelet Transform and Neural Network (웨이블렛 변환과 신경망을 이용한 음향방출신호의 자동분류에 관한연구)

  • Park, Jae-Jun;Kim, Meyoun-Soo;Oh, Seung-Heon;Kang, Tae-Rim;Kim, Sung-Hong;Beak, Kwan-Hyun;Oh, Il-Duck;Song, Young-Chul;Kwon, Dong-Jin
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.1880-1884
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    • 2000
  • The discrete wavelet transform is utilized as preprocessing of Neural Network(NN) to identify aging state of internal partial discharge in transformer. The discrete traveler transform is used to produce wavelet coefficients which are used for Classification. The statistical parameters (maximum of wavelet coefficients, average value, dispersion, skewness, kurtosis) using the wavelet coefficients are input into an back-propagation neural network. The neurons whose weights have obtained through Result of Cross-Validation. The Neural Network learning stops either when the error rate achieves an appropriate minimum or when the learning time overcomes a constant value. The networks, after training, can decide if the test signal is Early Aging State or Last Aging State or normal state.

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The Impact of Aging Anxiety and Successful Aging on the Personality Traits of Elderly (노인의 성격특성이 노화불안과 성공적 노화에 미치는 영향)

  • Yang, Nam Young
    • Journal of Korean Academic Society of Home Health Care Nursing
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    • v.23 no.2
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    • pp.177-185
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    • 2016
  • Purpose: In this study, we sought to identify the impact of aging anxiety and successful aging on the personality traits of elderly. Method: Subjects were 108 elderly persons aged more than 65 years. Data collected from June to November 2015 were analyzed using descriptive statistics, t-tests, ANOVA, Pearson's correlation coefficients, and stepwise multiple regression. Results: With regard to the mean scores of personality traits, conscientiousness yielded the highest score, and neuroticism the lowest. The mean score on aging anxiety was below average, and that on successful aging was above average. Aging anxiety differed significantly according to age, present job, economic status, and health status. Successful aging differed significantly according to having a spouse, economic status, and health status. Significant correlations were found between anxiety and conscientiousness, extraversion, and neuroticism, and between successful aging and conscientiousness, agreeableness, extraversion, openness, and neuroticism. Conscientiousness and neuroticism had an effect on aging anxiety (23.2%), whereas conscientiousness, agreeableness, extraversion, openness, and neuroticism affected aging anxiety (45.3%). Conclusion: These findings indicate that personality traits reduce aging anxiety and lead to successful aging among elderly.

Aging Effects on Sorption and Desorption of Atrazine in Soils (Atrazine의 토양 흡착 및 탈착에 미치는 접촉시간의 영향)

  • Park Jeong-Hun
    • Journal of Soil and Groundwater Environment
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    • v.10 no.1
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    • pp.26-34
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    • 2005
  • The effects of soil-chemical contact time (aging) on sorption and desorption of atrazine were studied in soil slurries because aging is an important determinant affecting on the sorption and desorption characteristics of organic contaminants in the environment. Sorption isotherm and desorption kinetic experiments were performed, and soilwater distribution coefficients and desorption rate parameters were evaluated using linear and non-linear sorption equations and a three-site desorption model, respectively. Aging time for sorption of atrazine in sterilized soil slurries ranged from 2 days to 8 months. Atrazine sorption isotherms were nearly linear $(r^2\;>\;0.97)$ and sorption coefficients were strongly correlated to soil organic carbon content. Sorption distribution coefficients $(K_d)$ increased with increasing aging in all soils studied. Sorption non-linearity did not increase with increased aging except for the Houghton muck soil. Desorption profiles were well described by the three-site desorption model. The equilibrium site fraction $(f_{eq})$ decreased and the non-desorbable site fraction $(f_{nd})$ increased as a function of aging time in all soils. In all soils studied, it was found that when normalized to soil organic matter content the concentration of atrazine in desorbable sites was comparatively constant, whereas that in non-desorbable site increased as aging increased.

Aging Anxiety and Related Factors of Middle-Aged Adults (중년기 성인의 노화불안과 영향요인)

  • Suh, Soon-Rim;Choi, Hee-Jung
    • Korean Journal of Adult Nursing
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    • v.25 no.4
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    • pp.464-472
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    • 2013
  • Purpose: The purpose of this study was to identify aging anxiety and influencing factors of middle-aged adults. Methods: Descriptive correlation design was used. Three hundred and three middle-aged adults participated in the study and completed the questionnaires in the period from September 11 to October 15 of 2011. The data was analyzed using independent t-test, one-way ANOVA, Scheff$\acute{e}$ test, Pearson correlation coefficients, and hierarchial multiple regression analysis. Results: Aging anxiety of middle-aged adults was higher than a moderate level. Socio-demographic variables such as age, religion, education, economic level, perceived health status and experience of living with older adults influenced significantly on aging anxiety. In contrast, general self-efficacy, aging knowledge and attitude toward older adults were negatively correlated with aging anxiety. Hierarchial multiple regression analysis incorporating these variables showed an explanation rate of aging anxiety at 21%. And religion, perceived health status, attitude toward older adults, and general self-efficacy were statistically significant among variables that influence on aging anxiety. Conclusion: The findings of this study suggest that senior preparation programs that can enhance self-efficacy, induce positive attitude on older adults and promote health should be implemented to reduce aging anxiety of middle-aged adults.

Influence of Ego Resilience and Family Resilience on the Perception of Successful Aging in Nursing Students (간호대학생의 자아탄력성 및 가족탄력성이 성공적 노화 인식에 미치는 영향)

  • Yang, Nam Young;Song, Min Sun
    • Journal of Korean Academic Society of Home Health Care Nursing
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    • v.26 no.3
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    • pp.278-287
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    • 2019
  • Purpose: This study aims to examine the relationship between ego resilience, family resilience, and the perception of successful aging in nursing students; additionally, specific factors relating to the perception of successful aging were identified. Methods: The participants comprised 154 nursing students. Data were collected through the administration of self-reported questionnaires. Data analysis was then performed utilizing a t-test, an ANOVA, Pearson's correlation coefficients, and a multiple regression analysis. Results: Family resilience differed significantly based on the type of residence (p=.020) (i.e., living with grandparents (p=.048)). Perception of successful aging differed significantly based on grade (p<.001). The perception of successful aging showed a positive correlation relative to mode of communication and organizational pattern. The mode of communication accounted for 4.7% of perception of successful aging. Conclusion: The significance of the study on the importance of mode of communication was confirmed by identifying the effects of the perception of successful aging. Nursing students may actively cope with crises through communication; thus, successfully recognizing aging in order to lead a healthy life. Furthermore, having a high perception of successful aging while treating an increasing number of elderly patients at the clinical practice is believed to have a positive effect on patient care.

A Study on the Sociocultural Psychological factors influencing on the Successful Aging of the elderly (노인의 성공적 노화에 영향을 미치는 사회문화·심리적 요인)

  • Cho, Young-Mun;Kang, Seung-Lang
    • Journal of Digital Convergence
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    • v.17 no.10
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    • pp.339-348
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    • 2019
  • This study was conducted to predict sociocultural psychological variables affecting successful aging of the elderly. The participants were 187 elderly people aged at least sixty who used 16 elderly welfare centers in G metropolitan city and J and S city from december 2018 to january 2019. Data analysis was done by using SPSS WIN 23.0 program, for one-way ANOVA, independent t-test, pearson correlation coefficients and multiple regression. This study showed a positive correlation between successful aging and basic psychological need, ego-integrity, cultural competence. The ego-integrity(${\beta}=.372$, p<.001), cultural competence(${\beta}=.410$, p<.001), relationship(${\beta}=.168$, p=.003) have a 71.1% explanatory power for the successful aging of the elderly. It is necessary to develop sociocultural psychological programs to promote self-integration, cultural competence, and relationship for successful aging of the elderly.

The Relationship of Life Satisfaction, Health Behaviors and Successful Aging in the Elderly (지역사회 노인의 생활만족도, 건강행위와 성공적 노후간의 관계)

  • Lee, Seon-Hye;Moon, Myeong-Ja
    • Journal of Korean Public Health Nursing
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    • v.26 no.2
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    • pp.204-214
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    • 2012
  • Purpose: This study was conducted in order to the relationship between life satisfaction, health behaviors, and successful aging and factors associated with successful aging. Methods: Participants in this study included 159 elders living in one city. Data on life satisfaction (Choi's Life Satisfaction Scale for Korean elderly, 1984), health behaviors (Choi & Kim's Health Behaviors Scale for Korean elderly, 1997), and successful aging (Kim & Shin's Successful Aging Scale for Korean elderly, 2005) were collected by trained interviewers. For analysis of collected data, the PASW 18.0 program was used, which included descriptive analysis, t-test, ANOVA, Scheffe test, Pearson correlation coefficients, and Multiple regression. Results: Results showed a positive correlation between life satisfaction, health behaviors, and successful aging. Life satisfaction, self-perceived health status, and health behavior explained 60.8% of successful aging. Conclusion: There is a need to help improve health behavior and self-perceived health status of elders. We should also understand life satisfaction over their life span and establish a program that encourages healthy behavior in the community. Accordingly, these efforts will allow for achievement of a more successful aging process for the elderly.