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"Avalanches"
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Avalanches
Describes what avalanches are, how they occur, and how to protect oneself from avalanches.
Book
The science of an avalanche
\"Discusses the science behind avalanches and their effects.\"--Provided by publisher.
Book
High-power-tolerant InAlAs avalanche photodiode for 25 Gbit/s applications
A wide optical-input dynamic range is demonstrated for an inverted p-down InAlAs/InGaAs avalanche photodiode. The 3 dB down bandwidth maintains a value as high as 18 GHz for an input optical power level of up to + 2.5 dBm. Such high-power tolerance meets the requirements of various future optical fibre communications systems such as 100 Gbit/s Ethernet which has a serial baud rate of 25 Gbit/s. [PUBLICATION ABSTRACT]
Journal Article
The science of avalanches
Fact boxes and timelines of real avalanches allow readers to be guided through safety and disaster relief so they'll be able to act if caught out in the cold when the snow starts to fall.
Book
Avalanche freestyle
\"Tony Jay is a rich kid with an attitude. Jack Hewlitt is a poor boy with nothing to lose. When the teens race each other down the mountain, no one knows who will end up winning. But one thing's for certain--the famour Aurora-Z snowboard awaits the winner...\"--Page 4 of cover.
Book
A Novel Structure of Super-junction MOSFET with Improved Avalanche Energy Capability
The UIS characteristic of the device is a key parameter of the super-junction MOSFET, which represents the reliable performance of the device in the face of extreme conditions. The maximum avalanche energy ( E AS ) that the device can withstand under a single pulse of the gate electrode or the maximum avalanche energy ( E AR ) that the device can withstand under multiple pulses of the gate electrode is commonly used in the industry to characterize the UIS characteristic. To solve the avalanche energy problem of super-junction MOSFET, we propose a novel structure of super-junction MOSFET with a P-type diffused region on the top of the N-column drift region.
Journal Article
The world's worst avalanches
\"An earthquake shakes a snow-covered mountain. The fresh snow slides down. It's an avalanche!\"-- Provided by publisher.
Book
Landau–Ginzburg theory of cortex dynamics
Understanding the origin, nature, and functional significance of complex patterns of neural activity, as recorded by diverse electrophysiological and neuroimaging techniques, is a central challenge in neuroscience. Such patterns include collective oscillations emerging out of neural synchronization as well as highly heterogeneous outbursts of activity interspersed by periods of quiescence, called “neuronal avalanches.” Much debate has been generated about the possible scale invariance or criticality of such avalanches and its relevance for brain function. Aimed at shedding light onto this, here we analyze the large-scale collective properties of the cortex by using a mesoscopic approach following the principle of parsimony of Landau–Ginzburg. Our model is similar to that of Wilson–Cowan for neural dynamics but crucially, includes stochasticity and space; synaptic plasticity and inhibition are considered as possible regulatory mechanisms. Detailed analyses uncover a phase diagram including down-state, synchronous, asynchronous, and up-state phases and reveal that empirical findings for neuronal avalanches are consistently reproduced by tuning our model to the edge of synchronization. This reveals that the putative criticality of cortical dynamics does not correspond to a quiescent-to-active phase transition as usually assumed in theoretical approaches but to a synchronization phase transition, at which incipient oscillations and scale-free avalanches coexist. Furthermore, our model also accounts for up and down states as they occur (e.g., during deep sleep). This approach constitutes a framework to rationalize the possible collective phases and phase transitions of cortical networks in simple terms, thus helping to shed light on basic aspects of brain functioning from a very broad perspective.
Journal Article