Jet A-2, A Fuel to Meet Canada's Energy Constraints

2009 ◽  
pp. 86-86-11
Author(s):  
DE Salter
Keyword(s):  
Energy Constraints

scholarly journals Energy constraints on brain network formation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kosuke Takagi
Keyword(s):  
Network Formation ◽  
Cost Minimization ◽  
Brain Network ◽  
Network Activity ◽  
Rich Functionality ◽  
Energy Constraints ◽  
Dependent Form ◽  
Statistical Similarity ◽  
Simple Ratio ◽  
The Brain

AbstractEnergy constraints are a fundamental limitation of the brain, which is physically embedded in a restricted space. The collective dynamics of neurons through connections enable the brain to achieve rich functionality, but building connections and maintaining activity come at a high cost. The effects of reducing these costs can be found in the characteristic structures of the brain network. Nevertheless, the mechanism by which energy constraints affect the organization and formation of the neuronal network in the brain is unclear. Here, it is shown that a simple model based on cost minimization can reproduce structures characteristic of the brain network. With reference to the behavior of neurons in real brains, the cost function was introduced in an activity-dependent form correlating the activity cost and the wiring cost as a simple ratio. Cost reduction of this ratio resulted in strengthening connections, especially at highly activated nodes, and induced the formation of large clusters. Regarding these network features, statistical similarity was confirmed by comparison to connectome datasets from various real brains. The findings indicate that these networks share an efficient structure maintained with low costs, both for activity and for wiring. These results imply the crucial role of energy constraints in regulating the network activity and structure of the brain.

Energy Constraints and Ultimate Decisions During Egg-Laying in the Blue Tit

Ecology ◽  
1993 ◽  
Vol 74 (1) ◽  
pp. 244-251 ◽  
Author(s):  
Jan-Ake Nilsson ◽  
Erik Svensson
Keyword(s):  
Egg Laying ◽  
Blue Tit ◽  
Energy Constraints

scholarly journals Time and energy constraints and the relationships between currencies in foraging theory

1994 ◽  
Vol 5 (1) ◽  
pp. 28-34 ◽  
Author(s):  
R. C Ydenberg ◽  
C. V. J. Welham ◽  
R. Schmid-Hempel ◽  
P. Schmid-Hempel ◽  
G. Beauchamp
Keyword(s):  
Foraging Theory ◽  
Energy Constraints ◽  
Time And Energy
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