نتایج جستجو برای: thermal variations
تعداد نتایج: 399619 فیلتر نتایج به سال:
Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. ...
The designer's preoccupation to reduce the energy needs and get a better thermal quality of ambiances helped in the development of several packages simulating the dynamic behaviour of buildings. This paper shows the adaptation of a method of thermal analysis, the nodal analysis, linked to the case of building's thermal behaviour. We take successively an interest in the case of conduction into a...
Background and Aims Knowledge of thermal acclimation of physiological processes of boreal tree species is necessary to determine their ability to adapt to predicted global warming and reduce the uncertainty around the anticipated feedbacks of forest ecosystems and global carbon cycle to climate change. The objective of this work was to examine the extent of thermal acclimation of net photosynth...
In the field of acoustic echo cancellation, it is well known that the amount of cancellation that can be obtained in real-world systems is limited. Euphemistically this has been referred to in the acoustic echo cancellation community as ”the 20 dB rule” [?]. This rule was formed from many real-world observations that one can typically obtain only about 20-30 dB of cancellation. The acoustic ech...
We have identified three possible ways in which future XMM-Newton observations can provide significant constraints on the equation of state of neutron stars. First, using a long observation of the neutron star X-ray transient Cen X–4 in quiescence one can use the RGS spectrum to constrain the interstellar extinction to the source. This removes this parameter from the X-ray spectral fitting of t...
Temperature plays a key role in outdoor industrial cultivation of microalgae. Improving the thermal tolerance of microalgae to both daily and seasonal temperature fluctuations can thus contribute to increase their annual productivity. A long term selection experiment was carried out to increase the thermal niche (temperature range for which the growth is possible) of a neutral lipid overproduci...
To estimate the potential outcomes of food processing on the fate of foodborne pathogens. variations in microbial parameters such as growth rate, survival time, thermal inactivation time, and toxin production must be known. Previous microbial studies using single strains or cocktails provide error estimates for the uncertainty of the experimental and statistical procedures, but not for variatio...
233 All material systems are dynamic. From subatomic particles, through atoms, to molecules and biochemicals, processes express and create complex patterns of vibrations (cycles) over time. Living systems, as conventionally defined by biology, express complex dynamic patterns of vibration over large ranges of frequencies. The human body emits dynamic patterns of thermal radiation as well as ele...
We analyze a sample of optical light curves for 100 quasars, 70 of which have black hole mass estimates. Our sample is the largest and broadest used yet for modeling quasar variability. The sources in our sample have z < 2.8, 10 . λLλ(5100Å) . 10 , and 10 . MBH/M⊙ . 10 . We model the light curves as a continuous time stochastic process, providing a natural means of estimating the characteristic...
Increasing the number of cores in order to the demand of more computing power has led to increasing the processor temperature of a multi-core system. One of the main approaches for reducing temperature is the dynamic thermal management techniques. These methods divided into two classes, reactive and proactive. Proactive methods manage the processor temperature, by forecasting the temperature be...
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