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Determinism and Stability in Physics
2018This chapter examines the role of stability and determinism in physical theories such as statistical mechanics. In the physical sciences, the notions of stability and instability, no longer camouflaged in the language of necessity and contingency, are often used in a variety of contexts, from chaos theory to quantum mechanics.
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Stability of Physical Activity across the Lifespan
Journal of Health Psychology, 2008Physical activity is associated with various health-relevant psychosocial and physiological processes, but activity stability across extended time periods is inadequately understood. This lifespan longitudinal cohort study examined activity levels of 723 males and 554 females.
Howard S, Friedman +5 more
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Stabilizing Integrators for Real-Time Physics
ACM Transactions on Graphics, 2018We present a new time integration method featuring excellent stability and energy conservation properties, making it particularly suitable for real-time physics. The commonly used backward Euler method is stable but introduces artificial damping. Methods such as implicit midpoint do not suffer from artificial damping but are unstable in many common ...
Dimitar Dinev +2 more
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Physical stability of semisynthetic suppository bases
Journal of Pharmaceutical Sciences, 1980Changes in the melting range of several semisynthetic suppository bases were studied over time. X-ray diffraction studies characterized the changes as amorphous to crystalline transitions, with likely polymorphic effects occurring concurrently. Use of a modified Krowczynski apparatus to test pure base and single-ingredient suppositories showed dramatic
L J, Coben, N G, Lordi
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Physical Stability of the Microcirculation
1971Since 1951, BURTON and his colleagues have discussed physical equilibrium of vascular walls by utilizing the Law of Laplace and proposed the concept of critical closing pressure (1–4). These results have been quoted in several standard textbooks of physiology.
T. Azuma, S. Oka
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Evaluation of the physical stability of two oleogels
International Journal of Pharmaceutics, 2006Oleogels are semisolid systems obtained with an organogelator and a hydrophobic liquid that have been investigated over the past few years and that could play an important role as dermatological bases. Recently, we have developed an oleogel of sorbitan monostearate (19wt.%) and sweet almond oil (SM-SAO) and another one of cholesterol (3.5wt.%) and ...
Isabel F, Almeida, M Fernanda, Bahia
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Physical-chemical limits for the stability of biomolecules
Advances in Space Research, 1986Water is an indispensable prerequisite for the existence of life. Only in an aqueous environment can biomolecules take up their native, tertiary structure and organize themselves into higher aggregates like multienzyme complexes or cell-organelles. In most of these processes interactions between biomolecules and water play an important role.
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The Correct Physical Basis of Protobranching Stabilization
The Journal of Physical Chemistry A, 2012The source of the extra stability of branched hydrocarbons over unbranched (hereafter referred to as protobraching stabilization) has been explained in several different self-consistent ways. Gronert, basing his arguments on well-established properties of organic molecules, namely that geminal atoms strongly repel each other, formulated a model which ...
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Physical Stabilization of Proteins in Aqueous Solution
2002The formulation scientist’s key goal is to achieve long-term stability of a drug compound. In the case of protein drugs, stabilization means not only maintaining the native chemical structure, but the native secondary and higher order structures necessary for biological activity (Cleland et al., 1993; Manning et al., 1989).
Brent S, Kendrick +2 more
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Stability of Physical Performance Test Scores
Research Quarterly. American Association for Health, Physical Education and Recreation, 1969Abstract On each of three days 73 subjects were administered three trials of a standing broad jump test, and 48 subjects were administered five trials of a side-step test. A significant trial-to-trial variability within days was found for the side-step test.
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