A study for the relationship between drive level and the Activation Energy in Arrhenius accelerated aging model for small size quartz resonators

The failure mechanism of rubber materials under accelerated stress in aging process may be different from that under normal conditions. Therefore, identification of the failure mechanism consistency is necessary for the accelerated aging testing of rubber material. To solve the problem, we study the relationship between the aging velocity of permanent compression set value and aging time. Firstly, according to the relationship, the aging velocity constant is obtained through the least square method. Then, combining with the aging velocity constant, we found that the activation energy is equal to the slope of linear function about Arrhenius model. Based on that failure activation energy keeps same under same failure mechanism, an identification method about failure mechanism consistency is developed. Finally, to demonstrate and validate the proposed method, we take the accelerated aging testing for the nitrile rubber-26 sealing gasket as an example.

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Thymectomy at weaning. An accelerated aging model for the mouse immune system

Mechanisms of Ageing and Development ◽

10.1016/0047-6374(91)90138-p ◽

1991 ◽

Vol 59 (3) ◽

pp. 275-289 ◽

Cited By ~ 9

Author(s):

Patrick Dutartre ◽

Marc Pascal

Keyword(s):

Immune System ◽

Accelerated Aging ◽

Aging Model

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New experiments on the relationship between light-induced defects and photoconductivity degradation

MRS Proceedings ◽

10.1557/proc-664-a12.2 ◽

2001 ◽

Vol 664 ◽

Cited By ~ 2

Author(s):

Stephan Heck ◽

Howard M. Branz

Keyword(s):

Activation Energy ◽

Defect Density ◽

Activation Energies ◽

Dangling Bond ◽

Fast Recovery ◽

Slow Recovery ◽

Degradation Model ◽

Induced Defects ◽

The Relationship ◽

Hydrogenated Amorphous

ABSTRACTWe report experimental results that help settle apparent inconsistencies in earlier work on photoconductivity and light-induced defects in hydrogenated amorphous silicon (a-Si:H) and point toward a new understanding of this subject. After observing that light-induced photoconductivity degradation anneals out at much lower T than the light-induced increase in deep defect density, Han and Fritzsche[1] suggested that two kinds of defects are created during illumination of a-Si:H. In this view, one kind of defect degrades the photoconductivity and the other increases defect sub-bandgap optical absorption. However, the light-induced degradation model of Stutzmann et al.[2] assumes that photoconductivity is inversely proportional to the dangling-bond defect density. We observe two kinds of defects that are distinguished by their annealing activation energies, but because their densities remain in strict linear proportion during their creation, the two kinds of defects cannot be completely independent.In our measurements of photoconductivity and defect absorption (constant photocurrent method) during 25°C light soaking and during a series of isochronal anneals between 25 < T < 190°C, we find that the absorption measured with E ≤1.1 eV, first increases during annealing, then exhibits the usual absorption decrease found for deeper defects. The maximum in this absorption at E ≤1.1eV occurs simultaneously with a transition from fast to slow recovery of photoconductivity. The absorption for E ≤1.1eV shows two distinct annealing activation energies: the signal rises with about 0.87 eV and falls with about 1.15 eV. The 0.87 eV activation energy roughly equals the activation energy for the dominant, fast, recovery of photoconductivity. The 1.15 eV activation energy roughly equals the single activation energy for annealing of the light-induced dangling bond absorption.

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Age-related decrements in cycling and running performance

South African Journal of Sports Medicine ◽

10.17159/2078-516x/2004/v16i2a181 ◽

2004 ◽

Vol 16 (2) ◽

pp. 8 ◽

Cited By ~ 1

Author(s):

A St Clair Gibson ◽

Ni Lambert ◽

TD Noakes

Keyword(s):

Athletic Performance ◽

Sports Medicine ◽

Weight Bearing ◽

Accelerated Aging ◽

Age Related ◽

Endurance Cycling ◽

Order Polynomial ◽

Bearing Stress ◽

Rate Of Decline ◽

The Relationship

Objective. This study examined age-related decrements in athletic performance during running and cycling activities. Design. The age group winning times for males aged between 18 and 70 years competing in the 1999 Argus cycle tour (103 km) and 1999 Comrades running marathon (90 km), South Africa's premier endurance cycling and running events respectively, were examined. Main outcome measures. The relationship between speed (cycling and running respectively) and age was calculated using a 4th order polynomial function. The derivative of each of these functions was determined and then the slope of the function corresponding to each age was calculated. Results. The rate of decline in running speed occurred at an earlier age (~ 32 years) during the running race compared with the cycling tour (~ 55 years). Conclusions. These findings establish a trend that there is ‘accelerated' aging during running which can perhaps be attributed to the increased weight-bearing stress on the muscles during running compared with cycling. SA Sports Medicine Vol.16(2) 2004: 8-11

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A general explanation for the compensation effect: The relationship between $Delta;S? and activation energy

Journal of Catalysis ◽

10.1016/0021-9517(82)90303-7 ◽

1982 ◽

Vol 78 (1) ◽

pp. 238-246 ◽

Cited By ~ 70

Author(s):

W CONNER

Keyword(s):

Activation Energy ◽

Compensation Effect ◽

The Relationship ◽

General Explanation

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Te Induced AlAs/GaAs Superlattice Mixing

MRS Proceedings ◽

10.1557/proc-126-71 ◽

1988 ◽

Vol 126 ◽

Cited By ~ 1

Author(s):

P. Mel ◽

S. A. Schwarz ◽

T. Venkatesan ◽

C. L. Schwartz ◽

E. Colas

Keyword(s):

Mass Spectrometry ◽

Activation Energy ◽

Diffusion Coefficient ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Secondary Ion Mass Spectrometry ◽

Chemical Vapor ◽

Temperature Range ◽

The Relationship ◽

Secondary Ion

ABSTRACTTe enhanced mixing of AlAs/GaAs superlattice has been observed by secondary ion mass spectrometry. The superlattice sample was grown by organometallic chemical vapor deposition and doped with Te at concentrations of 2×1017 to 5×1018 cm−.3 In the temperature range from 700 to 1000 C, a single activation energy for the Al diffusion of 2.9 eV was observed. Furthermore, it has been found that the relationship between the Al diffusion coefficient and Te concentration is linear. Comparisons have been made between Si and Te induced superlattice mixing.

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Study on the Relationship between Accelerated Aging, Color Characterization and Properties of Natural Fibers

Journal of Natural Fibers ◽

10.1080/15440478.2021.2002760 ◽

2021 ◽

pp. 1-11

Author(s):

Hongyu Jiang ◽

Jiaxin Shi ◽

Ning Zhou ◽

Xiaohang Tuo ◽

Yumei Gong ◽

...

Keyword(s):

Natural Fibers ◽

Accelerated Aging ◽

The Relationship ◽

Color Characterization

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Susceptibility to weathering damage and oxidative stress on soybean seeds with different lignin contents in the seed coat

Journal of Seed Science ◽

10.1590/2317-1545v38n4162115 ◽

2016 ◽

Vol 38 (4) ◽

pp. 296-304 ◽

Cited By ~ 4

Author(s):

Caroline Huth ◽

Liliane Marcia Mertz-Henning ◽

Sidnei Jose Lopes ◽

Luciane Almeri Tabaldi ◽

Liana Veronica Rossato ◽

...

Keyword(s):

Oxidative Stress ◽

Seed Coat ◽

Lignin Content ◽

Accelerated Aging ◽

Guaiacol Peroxidase ◽

Soybean Seeds ◽

Soybean Cultivars ◽

Activity Of Enzymes ◽

The Relationship ◽

And Oxidative Stress

Abstract: This study aimed at evaluating the relationship among lignin content in the seed coat of soybean seeds with tolerance to weathering damage and oxidative stress. Four soybean cultivars (CD 208, CD 215, CD 202 and BRS 184), with lignin contents in the seed coat of 4.2, 2.6, 2.0 and 1.7%, respectively, were used. Seeds were subjected to deterioration by moisture, through artificially simulated rains. Pods of all cultivars were subjected to irrigation by constant sprinkling during 4 hours, and then dried in oven, set at 35 °C, for 37 hours; repeating twice such procedure. After these treatments seeds were subjected to tests and then compared to the control. Tests performed were: germination, accelerated aging and tetrazolium test; thereby quantifying the occurrence of damages by weathering damage. The activity of enzymes superoxide dismutase and guaiacol peroxidase was measured; and the lipid peroxidation was assessed. Soybean cultivars CD 208 and CD 215, with higher lignin content in the seed coat, were less susceptible to weathering damage. Seeds of cultivar CD 208 have also presented lower oxidative stress, when subjected to weathering damage stress.

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