Results 31 to 40 of about 1,071,685 (317)

The Life Orientation Test: A Confirmatory Factor Analysis Across Three Age Groups [PDF]

Innovation in Aging, 2020
Abstract The Life Orientation Test (LOT; Scheier & Carver, 1985) was developed as a measure of dispositional optimism. Optimism has been linked to positive life outcomes and is associated with psychological (Carver & Gaines, 1987; Scheier & Carver, 1985) and physical (Scheier & Carver, 1987; Scheier et al.
Intrieri, Robert, Goodwin, Paige
openaire   +1 more source

Effects of Mechanical Stress on the Life and Insulation Performance of DC-Link Capacitors

Energies
Mechanical stress is a crucial factor affecting the life and insulation performance of DC-link capacitors (DCLCs). However, at present, there is a lack of long-term experimental observations on the effects of mechanical stress on the life and insulation ...
Xiaowu Sun, Ying Qiao, Yinda Li, Xiangming Guo, Chongfeng Cao   +4 more
doaj   +1 more source

The Effect of Air Humidity on the Performance of DC Link Capacitor Components

Energies
DC link capacitors (DCLCs) are key devices in converters. The relative humidity affects the performance of the elements of a DCLC. Currently, there are relatively few studies on the effect of relative humidity on the electrical characteristics of the ...
Xiaowu Sun, Ying Qiao, Yinda Li, Chongfeng Cao, Jian Zhang, Cheng Yu   +5 more
doaj   +1 more source

Preparation of cleaning and repairing agent and its double cleaning effect on surface contamination of silicone rubber external insulation

Materials Research Express, 2021
Due to the long-term operation of power grid and the interference of external uneven electric field environment, silicone rubber insulators are prone to aging and scaling, and their hydrophobicity and external insulation performance are easily affected ...
Yueju Zhao, Xiwei Xie, Jinbiao Shi, Huaping Shan, Min Liu, Jie Liu, Jianhui Wang, Boyan Jia, Yongli Zheng, Qiang Chen, Chunfeng Zhao, Jilin Teng, Wenhua Miao   +12 more
doaj   +1 more source

Goal Content for the practice of physical activity and the impact on subjective well-being in older adults [PDF]

, 2018
The main goal of this study consisted in an analysis of the impact that the goal content that leads to the practice of physical activity in the elderly population can play on the variables that constitute subjective well-being, as well as to analyze the ...
Antunes, Raul, Cid, Luis, Couto, Nuno, Marinho, Daniel, Monteiro, Diogo, Moutão, João   +5 more
core   +1 more source

Young and old genetically heterogeneous HET3 mice on a rapamycin diet are glucose intolerant but insulin sensitive [PDF]

, 2013
Rapamycin, an inhibitor of the mechanistic target of rapamycin (mTOR) signaling pathway, extends the life span of yeast, worms, flies, and mice. Interventions that promote longevity are often correlated with increased insulin sensitivity, and it ...
Astle, Clinton M., Baur, Joseph A., Harrison, David E., Lamming, Dudley W., Sabatini, David, Ye, Lan   +5 more
core   +1 more source

Aging Intensity for Step-Stress Accelerated Life Testing Experiments

Entropy
The aging intensity (AI), defined as the ratio of the instantaneous hazard rate and a baseline hazard rate, is a useful tool for the describing reliability properties of a random variable corresponding to a lifetime. In this work, the concept of AI is introduced in step-stress accelerated life testing (SSALT) experiments, providing new insights to the ...
Francesco Buono, Maria Kateri
openaire   +5 more sources

Testing brnbu ageing class of life-time distribution based on moment inequality

Journal of Computational Mathematica, 2021
In this paper, new moment inequality is derived for Bivariate Renewal New Better than Used (BRNBU) ageing class of life-time distribution. This inequality demonstrates that if the mean life is finite, then all higher order moments exist. Based on the Moment inequality, new testing procedures for testing bivariate exponentiality against BRNBU ageing ...
Touseef Ahmed, Rizwan U
openaire   +2 more sources

Reversal of age-related learning deficiency by the vertebrate PACAP and IGF-1 in a novel invertebrate model of aging: the pond snail (Lymnaea Stagnalis) [PDF]

, 2014
With the increase of life span, nonpathological age-related memory decline is affecting an increasing number of people. However, there is evidence that age-associated memory impairment only suspends, rather than irreversibly extinguishes, the intrinsic ...
Alexander, Audesirk, Chaudhury, D. Regl di, Delcourt, Du, G. Kemenes, Hattiangady, Hermann, Hernadi, I. Kemenes, J  zsa, Kemenes, Kemenes, Lee, Markowska, Otto, Otto, Patel, Patel, Pavlopoulos, Pirger, Pirger, Pirger, Roberto, S. Naskar, Sacchetti, Shioda, Silhol, Tamas, Telegdy, Vaudry, Watson, Watson, Yang, Yeoman, Z. Laszlo, Z. Pirger, Zhang   +38 more
core   +2 more sources

A Lifetime Prediction Method of Pressured Gas Polyethylene Pipes by Strain-Hardening Modulus and Tensile Test

Applied Sciences, 2023
In recent years, polyethylene (PE) pipes have been widely utilized for urban natural gas transmission. However, as the use of high-density polyethylene (HDPE) pipes increases, their service life and long-term performance assessment have become one of the
Wen-Shen Ran, Li Niu, Yang Wang, Nan Lin, Guo-Wei Feng, Hui-Qing Lan   +5 more
doaj   +1 more source