• Title, Summary, Keyword: Aging

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Incorporating Station Related Aging Failures in Bulk System Reliability Analysis

  • Billinton Roy;Yang Hua
    • KIEE International Transactions on Power Engineering
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    • v.5A no.4
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    • pp.322-330
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    • 2005
  • This paper proposes methods to incorporate station related aging failures in composite system reliability assessment. Aging failures of station components, such as circuit breakers and bus bars, are a major concern in composite power system planning and operation as an increasing number of station components approach the wear-out phase. This paper presents probabilistic models for circuit breakers involving aging failures and relevant evaluation techniques to examine the effects of station related aging outages. The technique developed to incorporate station related aging failures are illustrated by application to a small composite test system. The paper illustrates the effects of circuit breaker aging outages on bulk system reliability evaluation and examines the relative effects of variations in component age. System sensitivity analysis is illustrated by varying selected component parameters. The results show the implications of including component aging failure considerations in the overall analysis of a composite system.

A study on Aging Knowledge, Attitudes and Awareness about Supporting the Aged in Undergraduate Students (대학생의 노화 지식, 노인에 대한 태도 및 노인 부양 의식)

  • Yang, Ya Ki
    • The Journal of Korean Academic Society of Nursing Education
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    • v.19 no.4
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    • pp.498-507
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    • 2013
  • Purpose: This study was conducted to investigate the relationship of aging knowledge, attitudes and awareness about supporting the aged in undergraduate students. Method: The participants were 385 undergraduate students in H University in G city. Data were collected from March 1 to April 30, 2012, and analyzed using SPSS/WIN 18.0. Results: The mean of the aging knowledge score was 51.40, the mean of aging attitudes score was 3.06, and the mean of awareness about supporting the aged score was 4.11. Awareness about supporting the aged showed a positive correlation with aging knowledge (r=.299, p<.001). Awareness about supporting the aged showed a positive correlation with aging attitudes (r=.244, p<.001). Conclusion: The findings of this study indicate a need to develop programs for undergraduate students to increase correct aging knowledge, to encourage appropriate aging attitudes and awareness about supporting the aged. In addition, the need for further studies to examine effects of programs are needed.

A Study on R&D program for the aging society (고령사회 대응 연구개발 지원방안 연구)

  • Yoo, Jae-Seong
    • Journal of the Korea Safety Management & Science
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    • v.18 no.3
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    • pp.109-116
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    • 2016
  • The purpose of this study is to explore the research and development(R&D) programs for effectively response of population aging. We analyzed of aging-related R&D support status by National Science and Technology Information Services(NTIS) and reviewed of foreign aging-related R&D programs. It was found that the overall lack of support systems, the R&D support status for Korea's aging society is very low performance and the difference appears in the annual support status, etc. It is very important to enhance the effectiveness of R&D programs in order to effectively prepare for aging society. I suggested support measures of the R&D for aging society by survey research. The result of this study will help in planning of the R&D for aging society and contribute to increasing of welfare for the aged.

A Study on Strategies to Galvanize the Anti-aging Industry (항노화산업 활성화 방안에 관한 연구)

  • Jung, Tae-Young;Goh, Young-Gon;Chung, Hae-Joo
    • The Korean Journal of Health Service Management
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    • v.10 no.2
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    • pp.145-154
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    • 2016
  • Objectives : Because people have increasingly more interest in their quality of life, the anti-aging industry has grown worldwide. The purpose of this study is to suggest strategies for galvanizing the anti-aging industry in Korea. Methods : To accomplish this aim, we explored the definition, classification, problem and activating strategies of the anti-aging industry through a systematic review. Results : From the results, the following suggestions are given: planning a national strategy to galvanize the anti-aging industry, establishing an anti-aging research institute, developing a business model, developing an anti-aging cluster, statistics development and an information system related to anti-aging, training personnel, and legislation. Conclusions : The anti-aging industry has the potential to reduce health expenses through early intervention of diseases due to aging and through activation of the national economy by win-win growth of the industry related to aging. Therefore, understanding the anti-aging industry as well as political support is critical.

The effect of aging on the quality of Semimembranosus muscle from Hanwoo

  • Kim, Sun Hyo;Kim, Hyun Joo;Lee, Hyun Jung;Yong, Hae In;Jo, Cheorun;Nam, Ki Chang;Jung, Samooel
    • Korean Journal of Agricultural Science
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    • v.43 no.1
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    • pp.61-71
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    • 2016
  • The effect of postmortem aging on the quality of Semimembranosus muscle (SM) from Hanwoo was investigated. The quality of SM was compared with that of Longissimus dorsi muscle (LD). SM contained higher moisture, protein, and ash, and lower fat than LD (p<0.05). The $a^*$ and $b^*$ values of SM were significantly decreased after 21 days of aging. SM showed higher $a^*$ values than LD at 1 and 7 day of aging (p<0.05). The cooking loss of SM was not affect by aging. SM had higher cooking loss than that of LD throughout the aging period. Although the shear force of SM was significantly decreased by aging, SM showed high shear force compared to LD during aging period (p<0.05). Aging increased lipid oxidation in both muscles (p<0.05). However, TBARS value of SM was significantly lower than that of LD throughout the aging period (p<0.05). There was no effect of aging on the betaine and L-carnitine contents of SM. SM contained higher betaine and L-carnitine than LD in all aging days (p<0.05). Therefore, we concluded that consumer acceptability of SM could be increased by aging based on the increase of tenderness in addition to its high nutritional properties.

Effects of an Aging Management Program for Middle-aged Women on Resilience and Successful Aging (중년여성의 노화관리 프로그램이 회복탄력성과 성공적 노화에 미치는 영향)

  • Jung, Hyeyun;Sung, Kyung Mi
    • Korean Journal of Women Health Nursing
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    • v.25 no.4
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    • pp.392-408
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    • 2019
  • Purpose: The purpose of this study was to examine the effects of an aging management program on the resilience and successful aging of middle-aged women. Methods: A quasi-experimental study with a non-equivalent control and pre-post test design was used. The participants were 39 middle-aged women living in urban areas in Korea. The experimental group (n=22) received the aging management program for a total of 10 weeks, 90 minutes to 120 minutes per week. The aging management program consisted of strategies to enhance the behavior, promotion conditions, and habits of the program, including various activities for middle-aged women. The data were analyzed using χ2 tests, independent t-tests, and repeated measures analysis of variance with the SPSS/WIN 21.0 program. Results: The resilience score of the experimental group was significantly higher level than the score of the control group in the time-to-group interactions (F=3.70, p=0.029). The successful aging score of the experimental group was significantly higher than the score of the control group in the time-to-group interactions (F=5.86, p=0.004). However, the sub-hypotheses of resilience (self-regulation and interpersonal relationships) and successful aging (physical aging adaptation and psychological age adaptation) were partially accepted. Conclusions: The aging management program for middle-aged women was identified as an effective intervention for promoting resilience and successful aging in middle-aged women. Therefore, this suggests that the aging care program could be a useful intervention program to improve the mental health of middle-aged women living in communities.

Characteristics of Undrained Static Shear Behavior for Sand Due to Aging Effect (Aging 효과에 따른 모래의 비배수 정적전단거동 특성)

  • 김영수;김대만
    • Journal of the Korean Geotechnical Society
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    • v.20 no.6
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    • pp.137-150
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    • 2004
  • Aging effect of sands showed insignificant result in comparison with that of clay, so that it has not been studied so far. But, as penetration resistance increase has been observed with the lapse of time after deposition and disturbance, aging effect of sands has been actively investigated by field tests, and recently many researchers are performing not oかy field tests but also laboratory tests on sands, so aging effects of sands have been also examined by laboratory tests. In this study, to observe the aging effect of undrained static shear behavior for Nak-Dong River sand, undrained static triaxial tests were performed with changing relative density$(D_r)$, consolidation stress ratio$(K_c)$, and consolidation time. These tests showed that modulus within elastic section increased as consolidation time increased, and in addition, phase transformation point strength$(S_{PT})$ and critical stress ratio point strength $(S_{CSR})$ also increased. But pore water pressure ratio$(u/{p_c}')$ decreased as consolidation time increased, so with this various result, aging effect of static shear for sands can be observed as well.

Target Proteins Involved in Aging Mechanism as an Aging Molecular Marker (노화 분자마커로서 노화기전에 관여하는 타켓 단백질)

  • Kim, Moon-Moo
    • Journal of Life Science
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    • v.26 no.8
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    • pp.983-989
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    • 2016
  • All cells composing of our body undergo their destiny such as proliferation, differentiation, necrosis, apoptosis and senescence depending on their circumstance with time. The errors occurring in these processes develop several aberrations in phenotypes including cancer, inflammation, aging and diseases. New strategy and approach are required to screen anti-aging compounds derived from natural products. Therefore, here we explain the target proteins to play a key role in aging mechanism. In the first place, matrix metalloproteinases (MMPs) are involved in metastasis, chronic inflammation and skin aging as an aging marker. In particular, histone deacetylases (HDACs) give a great attention to aging researchers who try to extend the life span of animal model. In addition, we describe the signaling pathway related to senescence which p53, IGF-1 and SIRT1 play an important role in. Furthermore, autophagy is involved in the signaling pathway associated with aging. Several new compounds modulating the signaling pathway of senescence are introduced in this review. Here, we try to provide a new insight in the molecular basis for the aging mechanism and development of aging marker. In addition, the compounds introduced here could be available for pharmaceutical applications for the prevention and the treatment of diseases related to aging.

Dry aging of beef; Review

  • Dashdorj, Dashmaa;Tripathi, Vinay Kumar;Cho, Soohyun;Kim, Younghoon;Hwang, Inho
    • Journal of Animal Science and Technology
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    • v.58 no.5
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    • pp.20.1-20.11
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    • 2016
  • The present review has mainly focused on the specific parameters including aging (aging days, temperature, relative humidity, and air flow), eating quality (flavor, tenderness and juiciness), microbiological quality and economic (shrinkage, retail yields and cost) involved beef dry aging process. Dry aging is the process where beef carcasses or primal cuts are hanged and aged for 28 to 55 d under controlling environment conditions in a refrigerated room with $0^{\circ}$ to $4^{\circ}C$ and with relative humidity of 75 to 80 %. However there are various opinions on dry aging procedures and purveyors of such products are passionate about their programs. Recently, there has been an increased interest in dry aging process by a wider array of purveyors and retailers in the many countries. Dry aging process is very costly because of high aging shrinkage (6 to 15 %), trims loss (3 to 24 %), risk of contamination and the requirement of highest grades meat with. The packaging in highly moisture-permeable bag may positively impact on safety, quality and shelf stability of dry aged beef. The key effect of dry aging is the concentration of the flavor that can only be described as "dry-aged beef". But the contribution of flavor compounds of proteolysis and lipolysis to the cooked dry aged beef flavor is not fully known. Also there are limited scientific studies of aging parameters on the quality and palatability of dry aged beef.

Electric Field Induced Super-cooling System for Long Term Dry-aged Beef Loin

  • Park, Sin-Young;Kim, Hack-Youn
    • Food Science of Animal Resources
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    • v.40 no.2
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    • pp.286-296
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    • 2020
  • This study investigates the utilization of an electric-field-induced super cooling system in long-term dry aging of beef loin. Analyzed quality properties of dry-aged beef loin applied with electric field refrigeration (EFR) versus commercial refrigeration (CR). Quality properties was including aging loss, pH, water holding capacity (WHC), cooking loss, color, warner-bractzler shear force (WBSF), total plate count (TPC), and thiobarbituric acid reactive substances (TBARS). Aging loss of wk 1 EFR was significantly lower than CR (p<0.05). pH of EFR was slow change tendency compared CR. WHC of both aging methods were higher with increase in aging duration. Cooking loss of wk 1, 2, 4, and 10 EFR were significantly lower than CR (p<0.05). Lightness and redness of EFR was slow change tendency compared CR. However, yellowness of EFR was increased until wk 2, 3, and significantly decreased at wk 10 (p<0.05), but yellowness of CR was decreased until wk 3 and significantly increased with an increasing aging weeks (p<0.05). Both aging methods of WBSF was decreased with increase in aging weeks; however, wk 10 of CR was significantly lower than EFR (p<0.05). TPC after wk 3 EFR groups were significantly lower than CR groups (p<0.05), and TBARS of EFR groups were significantly lower than CR (p<0.05). The present results show that application of the EFR system for dry aging beef loin can extends its shelf life and induce changes of several aging properties in similar to commercial aging.