Results 251 to 260 of about 912,479 (304)
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Strengths and weaknesses of long-term bioassays
Regulatory Toxicology and Pharmacology, 1987The long-term bioassay for carcinogenic potential is a valuable tool for assessing human hazard, but suffers from severe limitations. Some of these follow directly from the use of animals as surrogates for man; others are created by study design and interpretations.
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Creep and Long-Term Strength of Structures
2020The issue of evaluating strength and service life is discussed as applied to structures performance of which is characterized by multi-parametric nonstationary thermal-mechanical effects. The major degradation mechanisms of structural materials are considered. In the framework of mechanics of damaged media, a mathematical model describing the processes
Ivan Volkov +2 more
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Subcritical crack growth and long-term strength in rock and cementitious material [PDF]
International Journal of Fracture, 2010 High-strength and ultra low-permeability concrete (HSULPC) is a strong candidate for a radioactive waste package containing transuranic radionuclides (TRU waste) for geological disposal.
Yoshitaka Nara +2 more
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Family strengths in long-term marriages
Lifestyles, 1984Considerable interest exists in identifying the characteristics of families that exhibit a high level of functioning. Since family strengths may be related to family stability, it is logical to examine long-term marriages for characteristics of strong and durable relationships.
Robert F. MacKinnon +2 more
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Long-term flexural strength, of glass ionomer cements
Biomaterials, 1991The flexural strength of five glass ionomers was measured at intervals ranging from 1 h to 3 months after mixing. The pattern of change in flexural strength is material-specific with two water-activated materials having significantly higher long-term flexural strengths than the others. This may be attributable to the different polyacrylic acids used or
G J, Pearson, A S, Atkinson
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Analysis of long-term strength criteria
Soviet Applied Mechanics, 1967The analysis of the durability of structural elements subjected te complex stress is an urgent problem ef modern mechanical engineering. Up to now a unified criterion of long-duration strength, enabling such analyses to be carried out for various temperature and load levels, has not been established.
V. N. Kiselevskii, V. V. Osasyuk
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Enzymatic Adaptations Consequent to Long-Term Strength Training*
International Journal of Sports Medicine, 1987The muscle enzymatic changes subsequent to 6 months of strength training followed by 3 months of detraining were examined in 21 physically active men. They were assigned either to a heavy-resistance (HR) or an explosive strength (EX) training program. Muscle biopsies were obtained from m. vastus lateralis for the assessment of activities of the enzymes
P A, Tesch, P V, Komi, K, Häkkinen
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Long-Term Strength Assessment of Postoperative Diskectomy Patients
Spine, 1989A test battery was used to measure abdominal and back muscle strength and endurance in 20 patients at least 1 year after surgical diskectomy. There were ten men and ten women. Data on isometric and isokinetic performance were compared with previously reported normal values.
N, Kahanovitz, K, Viola, M, Gallagher
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Long-Term Strength and Damage Analysis of Laminated Composites
AIAA Journal, 1997A modified version of the probabilistic model for damage evolution analysis of laminates subjected to random loading is utilized to predict long-term strength of laminates. The model assumes that each ply in a laminate consists of a large number of mesovolumes.
Dzenis, Yuris A., Joshi, Shiv P.
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Long-Term Impact of Strength Training on Muscle Strength Characteristics in Older Adults
Archives of Physical Medicine and Rehabilitation, 2013To evaluate the long-term preventive impact of strength training on muscle performance in older adults.A 7-year follow-up on a 1-year randomized controlled trial comparing the effects of combined resistance training and aerobic training and whole-body vibration training on muscle performance.University training center.Men and women (N=83; control [CON]
Eva, Kennis +5 more
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