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Echo State Networks with Self-Normalizing Activations on the Hyper-Sphere [article]

Pietro Verzelli and Cesare Alippi and Lorenzo Livi
2019 arXiv   pre-print
Among the various architectures of Recurrent Neural Networks, Echo State Networks (ESNs) emerged due to their simplified and inexpensive training procedure.  ...  behaviour in phase space characterised by a large memory of past inputs, comparable to the one of linear networks.  ...  Acknowledgements (not compulsory) We gratefully acknowledge the support of NVIDIA Corporation with the donation of the Titan Xp GPU used for this research.  ... 
arXiv:1903.11691v1 fatcat:ivpomppg4zdvjooprb6msdqlua

Echo State Networks with Self-Normalizing Activations on the Hyper-Sphere

Pietro Verzelli, Cesare Alippi, Lorenzo Livi
2019 Scientific Reports  
Among the various architectures of Recurrent Neural Networks, Echo State Networks (ESNs) emerged due to their simplified and inexpensive training procedure.  ...  behavior in phase space characterized by a large memory of past inputs, comparable to the one of linear networks.  ...  Acknowledgements We gratefully acknowledge the support of NVIDIA Corporation with the donation of the Titan Xp GPU used for this research.  ... 
doi:10.1038/s41598-019-50158-4 pmid:31554855 pmcid:PMC6761167 fatcat:5xow22avvnbwjntdxv5vjhwkkm

Hyper-Connectivity of Subcortical Resting-State Networks in Social Anxiety Disorder

Sheeba Arnold Anteraper, Christina Triantafyllou, Alice T. Sawyer, Stefan G. Hofmann, John D. Gabrieli, Susan Whitfield-Gabrieli
2014 Brain Connectivity  
In addition, with the putamen seed, the patient data exhibited increased connectivity in the frontoparietal regions (Executive Control Network) and subgenual cingulate (Affective Network).  ...  Subcortical resting state networks from structures including the striatum (caudate and putamen), globus pallidus, thalamus, amygdala and periaqueductal gray were compared between the two groups.  ...  Acknowledgments The authors would like to thank the Athinoula A. Martinos Imaging Center at McGovern Institute for Brain Research, Massachusetts Institute of Technology for funding.  ... 
doi:10.1089/brain.2013.0180 pmid:24279709 fatcat:udtwndm3krajhf6u2ugei4bftm

Cerebellar atrophy in Parkinson's disease and its implication for network connectivity

Claire O'Callaghan, Michael Hornberger, Joshua H. Balsters, Glenda M. Halliday, Simon J. G. Lewis, James M. Shine
2016 Brain  
The extent of cerebellar atrophy correlated with decreased resting-state connectivity between the cerebellum and large-scale cortical networks, including the sensorimotor, dorsal attention and default  ...  networks, but with increased connectivity between the cerebellum and frontoparietal networks.  ...  Our data on resting state cerebellar activity in Parkinson's disease are consistent with numerous studies showing its hyper-activation and associated functional gains to achieve performances at the level  ... 
doi:10.1093/brain/awv399 pmid:26794597 fatcat:vct4hkmplvhbtnlvdnqhcslt5u

Altered neural substrates within cognitive networks of postpartum women during working memory process and resting-state

Yunjin Bak, Yoonjin Nah, Sanghoon Han, Seung-Koo Lee, Na-Young Shin
2020 Scientific Reports  
Based on these results, we performed network connectivity analysis using nodes of the TPN and DMN.  ...  Our results suggest that postpartum women might have functional alterations in the DMN, and that hyper-activation in the TPN during a task might be a compensatory mechanism to maintain working memory performance  ...  Acknowledgements This study was supported by the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2014R1A1A2055116).  ... 
doi:10.1038/s41598-020-66058-x pmid:32499565 fatcat:lyhitosjwrfqbllbbvfhw6fmce

A Comparison of Deep Learning Methods for Airborne LiDAR Point Clouds Classification

Nan Li, Olaf Kaehler, Norbert Pfeifer
2021 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
deep learning networks: PointNet++, SparseCNN and KPConv, on two different ALS datasets.  ...  The performances of these three deep learning networks are compared w.r.t. classification accuracy, computation time, generalization ability as well as the sensitivity to the choices of hyper-parameters  ...  ACKNOWLEDGEMENTS The authors thank MA41 for kindly providing the ALS point clouds and agreeing to publish tiles that are used in the paper.  ... 
doi:10.1109/jstars.2021.3091389 fatcat:cj7vngtwijgxljijhy4jknwvr4

Toward a Standard Approach for Echo Chamber Detection: Reddit Case Study

Virginia Morini, Laura Pollacci, Giulio Rossetti
2021 Applied Sciences  
This paper proposes a general framework to identify echo chambers on online social networks built on top of features they commonly share.  ...  Even if users appear strongly polarized with respect to their ideology, most tend not to insulate themselves in echo chambers.  ...  [41] ), have proven that leveraging a bidirectional multi-head self-attention scheme yields state-of-the-art performances when dealing with sentence-level classification.  ... 
doi:10.3390/app11125390 fatcat:f4mehbaxivclfiuk7oqxpk6pcy

Depression, rumination and the default network

Marc G. Berman, Scott Peltier, Derek Evan Nee, Ethan Kross, Patricia J. Deldin, John Jonides
2010 Social Cognitive and Affective Neuroscience  
Major depressive disorder (MDD) has been characterized by excessive default-network activation and connectivity with the subgenual cingulate.  ...  These hyper-connectivities are often interpreted as reflecting rumination, where MDDs perseverate on negative, self-referential thoughts.  ...  These images were then normalized with SPM5 (Wellcome Department of Cognitive Neurology, London), and normalization parameters were calculated from the standard MNI template.  ... 
doi:10.1093/scan/nsq080 pmid:20855296 pmcid:PMC3190207 fatcat:dcvgpd3cbrhhzcvmy5t4nzowvm

Changes in global brain connectivity in LSD-induced altered states of consciousness are attributable to the 5-HT2A receptor [article]

Katrin H. Preller, Joshua B. Burt, Jie Lisa Ji, Charles Schleifer, Brendan Adkinson, Philipp Staempfli, Grega Repovs, John H. Krystal, John D. Murray, Franz X. Vollenweider, Alan Anticevic
2017 bioRxiv   pre-print
Critically, the LSD-induced subjective effects were associated with somatomotor networks GBC changes.  ...  Here we focus on resting-state fMRI, a measure of spontaneous neural fluctuations that can map functional brain connectivity.  ...  This is in line with data on subjective LSD-induced effects which were normalized by the pretreatment with ketanserin (Fig. 1F) .  ... 
doi:10.1101/219956 fatcat:c343nkwtfjapbloj767uag335i

Right Wing Populism in the West: Social Media Discourse and Echo Chambers

Majid Khosravinik
2017 Insight Turkey  
It discusses the British Brexit vote as a quintessential example of strategic misplacement of migration issue as the main problem to disguise the democratic deficit of a hyper-normalized neoliberal economic  ...  It shows how legitimate economic grievances of lower classes have been strategically appropriated by political elites to project xenophobic discourses and how globalist-capitalist parties capitalize on  ...  The hyper-normalization of neoliberal values along with deliberate misinformation, tapping into nationalism, anti-immigration rhetoric of the incumbent governments and the change in traditional class divisions  ... 
doi:10.25253/99.2017193.04 fatcat:vnpbgoudsjd4jluwnwmaaca24u

Functional connectivity in mild traumatic brain injury

Andrew R. Mayer, Maggie V. Mannell, Josef Ling, Charles Gasparovic, Ronald A. Yeo
2011 Human Brain Mapping  
Results: Significant differences in self-reported cognitive, emotional, and somatic complaints were observed (all P < 0.05), despite normal clinical (T1 and T2) imaging and neuropsychological testing results  ...  Mild TBI patients demonstrated decreased functional connectivity within the DMN and hyper-connectivity between the DMN and lateral prefrontal cortex.  ...  ACKNOWLEDGMENTS Special thanks to Diana South and Cathy Smith for assistance with data collection, to Reyaad Hayek, M.D. for review of anatomical images, and to Gayle Pohl and her students for generous  ... 
doi:10.1002/hbm.21151 pmid:21259381 pmcid:PMC3204375 fatcat:xivlgtkfxbbptldfnuz3m2etry

Vaccine Selfie. The double face of self-representation in Covid-19 era

Anna Chiara Sabatino
2021 Aisthesis  
stage of social networks, but it acquires the power to act on the social body.  ...  The Selfie, therefore, can be characterized as an iconic two-faced act with contradictory and ambiguous intentions and outcomes.  ...  The Selfies posted on social networks are in fact echoes of the identity of those who produce them, heuristic outcomes of a relational and dialogical practice of self-design or self-branding through a  ... 
doi:10.36253/aisthesis-12812 fatcat:j4hvno4s3veilb7y6arc2bsoxm

Altered intrinsic functional brain architecture in female patients with bulimia nervosa

Li Wang, Qing-Mei Kong, Ke Li, Xue-Ni Li, Ya-Wei Zeng, Chao Chen, Ying Qian, Shi-Jie Feng, Ji-Tao Li, Yun'Ai Su, Christoph U. Correll, Philip B. Mitchell (+3 others)
2017 Journal of Psychiatry & Neuroscience  
Data preprocessing The resting state fMRI images were preprocessed using Data Processing Assistant for Resting-State fMRI (DPARSF; http://rfmri.org/DPARSF), which is based on Statistical  ...  with illness state.  ...  The size of the spheres indicates the number of increased or decreased connectiv ities with a node.  ... 
doi:10.1503/jpn.160183 pmid:28949286 pmcid:PMC5662463 fatcat:wrugayxrrrbw3l7rf7fqhmcaga

Neural Correlates of Dream Lucidity Obtained from Contrasting Lucid versus Non-Lucid REM Sleep: A Combined EEG/fMRI Case Study

Martin Dresler, Renate Wehrle, Victor I. Spoormaker, Stefan P. Koch, Florian Holsboer, Axel Steiger, Hellmuth Obrig, Philipp G. Sämann, Michael Czisch
2012 Sleep  
Conclusions: In line with recent EEG data, lucid dreaming was associated with a reactivation of areas which are normally deactivated during REM sleep.  ...  During lucid dreaming the bilateral precuneus, cuneus, parietal lobules, and prefrontal and occipito-temporal cortices activated strongly as compared with non-lucid REM sleep.  ...  particular, the right dorsolateral prefrontal cortex was associated with self-focused metacognitive evaluation. 10 While in normal dreams, working memory is strongly impaired, 2 activation in the dorsolateral  ... 
doi:10.5665/sleep.1974 pmid:22754049 pmcid:PMC3369221 fatcat:cmlunlr7mbf4tmsgmbgnhbdkdi

Changes in global and thalamic brain connectivity in LSD-induced altered states of consciousness are attributable to the 5-HT2A receptor

Katrin H Preller, Joshua B Burt, Jie Lisa Ji, Charles H Schleifer, Brendan D Adkinson, Philipp Stämpfli, Erich Seifritz, Grega Repovs, John H Krystal, John D Murray, Franz X Vollenweider, Alan Anticevic
2018 eLife  
Background:Lysergic acid diethylamide (LSD) has agonist activity at various serotonin (5-HT) and dopamine receptors.  ...  We quantified resting-state functional connectivity via a data-driven global brain connectivity method and compared it to cortical gene expression maps.  ...  Additional information Competing interests Grega Repovs, John D Murray, Alan Anticevic: consults for and holds equity with Blackthorn Therapeutics.  ... 
doi:10.7554/elife.35082 pmid:30355445 pmcid:PMC6202055 fatcat:zyh4m2spsjghjnwnb724ui4pre
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