Network-State-Dependent Routing and Route-Dependent Spectrum Assignment for PRMLSA Problem in All-Optical Elastic Networks

2021 ◽  
pp. 100646
Author(s):  
V.A.C. VALE ◽  
R.C. ALMEIDA ◽  
K.D.R. Assis
Keyword(s):  
Spectrum Assignment ◽  
Elastic Networks ◽  
Network State ◽  
State Dependent ◽  
All Optical

scholarly journals Connectivity and network state-dependent recruitment of long-range VIP-GABAergic neurons in the mouse hippocampus

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Ruggiero Francavilla ◽  
Vincent Villette ◽  
Xiao Luo ◽  
Simon Chamberland ◽  
Einer Muñoz-Pino ◽  
...  
Keyword(s):  
Long Range ◽  
Gabaergic Neurons ◽  
Network State ◽  
State Dependent ◽  
Mouse Hippocampus

scholarly journals Network state-dependent inhibition of identified hippocampal CA3 axo-axonic cells in vivo

2013 ◽  
Vol 16 (12) ◽  
pp. 1802-1811 ◽  
Author(s):  
Tim J Viney ◽  
Balint Lasztoczi ◽  
Linda Katona ◽  
Michael G Crump ◽  
John J Tukker ◽  
...  
Keyword(s):  
Network State ◽  
State Dependent ◽  
Dependent Inhibition ◽  
Hippocampal Ca3

scholarly journals All-Optical VCSEL-to-VCSEL Injection Based on Cross Gain Modulation for Routing in Multinode Flexible Spectrum Optimization in Optical Fibre Transmission Links

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
P. P. Dlamini ◽  
G. M. Isoe ◽  
D. Kiboi Boiyo ◽  
A. W. R. Leitch ◽  
T. B. Gibbon
Keyword(s):  
Optical Networks ◽  
Optical Fibre ◽  
Optical Transmission ◽  
Cavity Surface ◽  
Gain Modulation ◽  
Spectrum Assignment ◽  
Cross Gain Modulation ◽  
All Optical ◽  
Routing And Spectrum Assignment ◽  
Optical Fibre Transmission

In this paper, we experimentally present a novel, all-optical spectral efficient vertical-cavity surface-emitting laser- (VCSEL-) based technique for routing and spectrum assignment in optical networks. Exploiting all optical VCSEL-to-VCSEL injection to attain cross gain modulation, the optical transmitter is optimized for optical transmission paths to assure quality of service by overcoming blockage for differentiated bandwidth demands during network congestion incidences. A 10 Gbps directly modulated 1549 nm master VCSEL is optically injected into the 1549 nm side modes of a 1550 nm slave VCSEL. The Shannon limit is considered for higher transmission rates with the problem decomposed into degraded routing and spectrum assignment and chromatic dispersion in the optical transmission link penalties. In this work, the proposed technique achieved a 1.3 dB penalty for transmission over a 25 km G.655 nonzero dispersion-shifted single-mode optical fibre, a value within the transmission media and optical system characteristics of 3 dB as recommended by the International Telecommunication Union-Telecommunication (ITU-T). The number of transceivers, switches, and optical transmission links in the network was reduced, increasing the number of satisfied bandwidth requests, thus optimizing the spectral resource utilization.

scholarly journals Corrigendum: Synaptic Mechanisms Underlying the Network State-Dependent Recruitment of VIP-Expressing Interneurons in the CA1 Hippocampus

2020 ◽  
Vol 30 (5) ◽  
pp. 3437-3437 ◽  
Author(s):  
Xiao Luo ◽  
Alexandre Guet-McCreight ◽  
Vincent Villette ◽  
Ruggiero Francavilla ◽  
Beatrice Marino ◽  
...  
Keyword(s):  
Network State ◽  
State Dependent ◽  
Synaptic Mechanisms

Common excitatory synaptic inputs to electrically connected cortical fast-spiking cell networks

2013 ◽  
Vol 110 (4) ◽  
pp. 795-806 ◽  
Author(s):  
Takeshi Otsuka ◽  
Yasuo Kawaguchi
Keyword(s):  
Pyramidal Cells ◽  
Network Activity ◽  
Dependent Manner ◽  
Inhibitory Effects ◽  
Cell Network ◽  
Network State ◽  
State Dependent ◽  
Fast Spiking ◽  
Chemical Synapses ◽  
Cell Networks

Cortical fast-spiking (FS) interneurons are electrically interconnected through gap junctions and form dendritic net structures extending over different functional columns. Here we investigated how pyramidal cells regulate FS cell network activity. Using paired recordings and glutamate puff stimulations, we found that FS cell pairs connected by electrical synapses shared common inputs from surrounding pyramidal cells more frequently than those unconnected or connected only by chemical synapses. Experimental and simulation results suggest that activity spread evoked by common inputs to electrically connected FS cells depends on network state. When cells were in the depolarized state, common inputs to electrically connected cells enhanced spike induction and induced inhibitory effects in surrounding FS cells. By contrast, in the hyperpolarized state, either sub- or suprathreshold inputs produced depolarizing potentials in nearby cells. Our results suggest that globally connected FS cell networks are locally regulated by pyramidal cells in an electrical connection- and network state-dependent manner.

scholarly journals Synaptic Mechanisms Underlying the Network State-Dependent Recruitment of VIP-Expressing Interneurons in the CA1 Hippocampus

2020 ◽  
Vol 30 (6) ◽  
pp. 3667-3685 ◽  
Author(s):  
Xiao Luo ◽  
Alexandre Guet-McCreight ◽  
Vincent Villette ◽  
Ruggiero Francavilla ◽  
Beatrice Marino ◽  
...  
Keyword(s):  
Computational Models ◽  
Information Selection ◽  
Two Photon ◽  
Network State ◽  
State Dependent ◽  
Speed Modulation ◽  
Pathway Activation ◽  
Theoretical Predictions ◽  
The Impact ◽  
Synaptic Mechanisms

Abstract Disinhibition is a widespread circuit mechanism for information selection and transfer. In the hippocampus, disinhibition of principal cells is provided by the interneuron-specific interneurons that express the vasoactive intestinal polypeptide (VIP-IS) and innervate selectively inhibitory interneurons. By combining optophysiological experiments with computational models, we determined the impact of synaptic inputs onto the network state-dependent recruitment of VIP-IS cells. We found that VIP-IS cells fire spikes in response to both the Schaffer collateral and the temporoammonic pathway activation. Moreover, by integrating their intrinsic and synaptic properties into computational models, we predicted recruitment of these cells between the rising phase and peak of theta oscillation and during ripples. Two-photon Ca2+-imaging in awake mice supported in part the theoretical predictions, revealing a significant speed modulation of VIP-IS cells and their preferential albeit delayed recruitment during theta-run epochs, with estimated firing at the rising phase and peak of the theta cycle. However, it also uncovered that VIP-IS cells are not activated during ripples. Thus, given the preferential theta-modulated firing of VIP-IS cells in awake hippocampus, we postulate that these cells may be important for information gating during spatial navigation and memory encoding.

Correlation analysis of radiation damage

1978 ◽  
Vol 36 (1) ◽  
pp. 214-215
Author(s):  
R. Hegerl ◽  
A. Feltynowski ◽  
B. Grill
Keyword(s):  
Electron Microscopy ◽  
Independent Random Variables ◽  
Optical Parameters ◽  
Bright Field Image ◽  
Bright Field ◽  
Expectation Value ◽  
All Optical ◽  
Image Element ◽  
Stochastic Series ◽  
The Common

Till now correlation functions have been used in electron microscopy for two purposes: a) to find the common origin of two micrographs representing the same object, b) to check the optical parameters e. g. the focus. There is a third possibility of application, if all optical parameters are constant during a series of exposures. In this case all differences between the micrographs can only be caused by different noise distributions and by modifications of the object induced by radiation.Because of the electron noise, a discrete bright field image can be considered as a stochastic series Pm,where i denotes the number of the image and m (m = 1,.., M) the image element. Assuming a stable object, the expectation value of Pm would be Ηm for all images. The electron noise can be introduced by addition of stationary, mutual independent random variables nm with zero expectation and the variance. It is possible to treat the modifications of the object as a noise, too.

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