نتایج جستجو برای: abrupt expansion

تعداد نتایج: 153580  

2006
ABBAS MANSOORI

Using abrupt expansion as an energy dissipater in bottom outlet of dams may have unfavorable effects on dam safety due to cavitation. Domain and intensity of cavitation, depends on magnitude and location of negative pressure. Therefore predicting the extent and intensity of negative pressure plays an important role in detection of cavitation. On the other hand, there is no globally accepted tur...

2017
Jian Huang Jing Li

Climate change has changed numerous species phenologies. Understanding the asynchronous responses between pest insects and host plants to climate change is helpful in improving integrated pest management. It is necessary to use long-term data to analyze the effects of climate change on cotton bollworm and wheat anthesis. Data for cotton bollworm, wheat yield, and wheat anthesis collected since ...

Journal: :Nature Geoscience 2021

Journal: :Forests 2022

Monitoring disturbances in tropical forests is important for assessing disturbance-related greenhouse gas emissions and the ability of to sequester carbon, formulating strategies sustainable forest management. Thanks a long-term observation history, large spatial coverage, support from powerful cloud platforms such as Google Earth Engine (GEE), remote sensing increasingly used detect disturbanc...

Journal: :Perception & psychophysics 1995
J Theeuwes

The present studies investigated whether an isoluminant color change pops out, indicating that it can be detected preattentively in parallel. The results of Experiment 1 show that an abrupt color change presented on an equiluminant background does not pop out. However, when the color change is accompanied by a small luminance change, it does pop out. The results of Experiment 2 show that the po...

2004
Ji Heon Ryu Jae Woo Kim Yung-Eun Sung Seung M. Oh

Si composite negative electrodes for lithium secondary batteries degrade in the dealloying period with an abrupt increase in internal resistance that is caused by a breakdown of conductive network made between Si and carbon particles. This results from a volume contraction of Si particles after expansion in the previous alloying process. Due to the large internal resistance, the dealloying reac...

2000
JONATHAN P. ROTHSTEIN GARETH H. MCKINLEY

We study the creeping flow of a dilute, monodisperse polystyrene/oligomeric styrene Boger fluid through axisymmetric abrupt contraction-expansions of various contraction ratios and over a wide range of Deborah numbers. Measurements of the entry pressure drop for the polystyrene solution increase monotonically with Deborah number and are substantially larger than those observed for a similar New...

1997
Hisakazu Minakata Alan Chodos

The Gross-Neveu model with chemical potential is investigated as a lowenergy effective theory of polyacetylene. In particular, we focus on the abrupt change in the features of electric conductivity such as sharp rise in the Pauli paramagnetism at dopant concentration of about 6%. We will try to explain it by the finite density phase transition in the Gross-Neveu model. The thermodynamic Bethe a...

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