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Nesting of dynamic systems and mode-dependent networks [article]

David I. Spivak, Joshua Z. Tan
2015 arXiv   pre-print
This paper provides a formal semantics, using the category-theoretic framework of operads and their algebras, to capture the nesting property and dynamics of mode-dependent networks.  ...  This paper addresses the issue of nesting such mode-dependent networks, in which a local network can be abstracted as a single module in a larger network.  ...  Acknowledgments Thanks go to Eugene Lerman for many useful and interesting discussions, and for pointing out the work of Mike Field on asynchronous networks [11] , which made this paper possible.  ... 
arXiv:1502.07380v3 fatcat:k7tbllinjjedvj5x4gpxnscnfa

Nesting of dynamical systems and mode-dependent networks

David I. Spivak, Joshua Tan
2016 Journal of Complex Networks  
This paper provides a formal semantics, using the category-theoretic framework of operads and their algebras, to capture the nesting property and dynamics of mode-dependent networks.  ...  This paper addresses the issue of nesting such mode-dependent networks, in which a local network can be abstracted as a single module in a larger network.  ...  Not any seemingly-workable de nition of mode-dependent dynamic systems will actually satisfy the nesting property.  ... 
doi:10.1093/comnet/cnw022 fatcat:adfnisdjg5dznbsmzsemgtg6pa

Ecological consequences of colony structure in dynamic ant nest networks

Samuel Ellis, Daniel W. Franks, Elva J. H. Robinson
2017 Ecology and Evolution  
nest system Using ie d data and nove ana y ca approaches combining surviva mode s with dynamic network ana ysis we show that the surviva and budding of nests within a po ydomous co ony are afected by  ...  and of founding new nests Our resu ts high ight how apparent y disparate en es in a bio ogica system can be integrated into a func ona eco ogica unit We a so demonstrate how posi on within a dynamic network  ...  networks this process cou d resu t The network therefore wi be con nua y restructuring resu ng in a dynamic system which is not stab e through me Dynamic processes wi react diferent y to sta c systems  ... 
doi:10.1002/ece3.2749 pmid:28303187 pmcid:PMC5306006 fatcat:dgnazyb73bhmzb7jhq7ncy7bei

The NEST Dry-Run Mode: Efficient Dynamic Analysis of Neuronal Network Simulation Code

Susanne Kunkel, Wolfram Schenck
2017 Frontiers in Neuroinformatics  
NEST is a simulator for spiking neuronal networks that commits to a general purpose approach: It allows for high flexibility in the design of network models, and its applications range from small-scale  ...  Here, we present the NEST dry-run mode, which enables comprehensive dynamic code analysis without requiring access to high-performance computing facilities.  ...  ACKNOWLEDGMENTS The authors would like to thank Alexander Peyser from the SimLab Neuroscience at the Jülich Supercomputing Centre for his work on the NEST Time class, which is presented as one of the use  ... 
doi:10.3389/fninf.2017.00040 pmid:28701946 pmcid:PMC5487483 fatcat:a7z7cyqhtrbunaoggybaimtqwm

Nestedness across biological scales

Mauricio Cantor, Mathias M. Pires, Flavia M. D. Marquitti, Rafael L. G. Raimundo, Esther Sebastián-González, Patricia P. Coltri, S. Ivan Perez, Diego R. Barneche, Débora Y. C. Brandt, Kelly Nunes, Fábio G. Daura-Jorge, Sergio R. Floeter (+2 others)
2017 PLoS ONE  
We primarily explore the implications of a nested structure for each of these studied systems, then theorize on how nested networks are assembled.  ...  Here, we compute nestedness in a diverse collection of one-mode networked systems from six different levels of biological organization depicting gene and protein interactions, complex phenotypes, animal  ...  Wedekin and all researchers and field assistants involved in the collection of data on dolphins and reef fish; and to S.  ... 
doi:10.1371/journal.pone.0171691 pmid:28166284 pmcid:PMC5293200 fatcat:xwjxb2cngfaijlyofd3ayqyjni

Performance Evaluation of Dynamic Speculative Multithreading with the Cascadia Architecture

David A. Zier, Ben Lee
2010 IEEE Transactions on Parallel and Distributed Systems  
In addition, a detailed study is provided on the effects that thread granularity and interthread dependencies have on the entire system.  ...  One promising method of exploiting TLP is Dynamic Speculative Multithreading (D-SpMT), which extracts multiple threads from a sequential program without compiler support or instruction set extensions.  ...  and distributed systems, and wireless networks.  ... 
doi:10.1109/tpds.2009.47 fatcat:67yggflhyzhuliigsax3in274q

Coevolutionary dynamics shape the structure of bacteria‐phage infection networks

Miguel A. Fortuna, Matthew Barbour, Luis Zaman, Alex R. Hall, Angus Buckling, Jordi Bascompte
2019 Evolution  
We found that interactions between coevolving bacteria and phages become less nested over time under fluctuating dynamics, and more nested under arms race dynamics.  ...  Specifically, we look at the tendency of these networks to be organized in a nested pattern by which the more specialist phages tend to infect only a proper subset of those bacteria infected by the most  ...  The change in 283 nestedness over time observed when considering the non-perfectly nested networks 284 depended on coevolutionary dynamics after controlling for network size and con-285 nectance (F 1,9  ... 
doi:10.1111/evo.13731 pmid:30953575 fatcat:7ulme2djuvbl5fnc6n4uskg2ii

Dynamic Pricing in One-Sided Autonomous Ride-Sourcing Markets

Renos Karamanis, Panagiotis Angeloudis, Aruna Sivakumar, Marc Stettler
2018 2018 21st International Conference on Intelligent Transportation Systems (ITSC)  
Dynamic pricing has been used by Transportation Network Companies (TNCs) to achieve a balance between the volume of ride requests with numbers of available drivers on two-sided TNC markets.  ...  Public transport is considered as an alternative mode of transportation in both scenarios.  ...  The travel and waiting times for each option vary between travellers and depend on network characteristics and vehicle distributions across the network at the time of the request.  ... 
doi:10.1109/itsc.2018.8569227 dblp:conf/itsc/KaramanisASS18 fatcat:ahmh3hlzpbct5isccayg53uyau

Nested Mixture of Experts: Cooperative and Competitive Learning of Hybrid Dynamical System [article]

Junhyeok Ahn, Luis Sentis
2021 arXiv   pre-print
In this paper, we devise a nested mixture of experts (NMOE) for representing and learning hybrid dynamical systems.  ...  Model-based reinforcement learning (MBRL) algorithms can attain significant sample efficiency but require an appropriate network structure to represent system dynamics.  ...  Acknowledgments The authors would like to thank the members of the Human Centered Robotics Laboratory at The University of Texas at Austin for their great help and support.  ... 
arXiv:2011.10605v2 fatcat:izdwytkp3bgn7bt4xnnvnwyw7i

Multiple dynamical time-scales in networks with hierarchically nested modular organization

SITABHRA SINHA, SWARUP PORIA
2011 Pramana (Bangalore)  
This suggests a possible functional role of such mesoscopic organization principle in natural systems, viz., in the dynamical separation of events occurring at different spatial scales.  ...  Investigating the process of synchronization of oscillators in a hierarchical modular network, we show the existence of as many distinct time-scales as there are hierarchical levels in the system.  ...  Pan for his assistance with the simulations and R. E. Amritkar for helpful discussions.  ... 
doi:10.1007/s12043-011-0196-y fatcat:luwgaqnkbbh65ozqdepbex67qe

A general formulation for multi-modal dynamic traffic assignment considering multi-class vehicles, public transit and parking

Xidong Pi, Wei Ma, Zhen (Sean) Qian
2019 Transportation Research Procedia  
Travel behavior of passenger demand on modes and routes choices is encapsulated by a multi-layer nested logit model.  ...  Managing such a complex multi-modal system requires a holistic modeling framework of transportation network flow in terms of both passenger flow and vehicular flow.  ...  Acknowledgements This research is funded in part by NSF award CMMI-1751448 and CNS-1544826, and Carnegie Mellon University's Mobility21, a National University Transportation Center for Mobility sponsored  ... 
doi:10.1016/j.trpro.2019.05.047 fatcat:mo2ntzw7z5gytiyymh6bzgzj5m

Nested-loop neural network vector control of permanent magnet synchronous motors

Shuhui Li, Michael Fairbank, Xingang Fu, Donald C. Wunsch, Eduardo Alonso
2013 The 2013 International Joint Conference on Neural Networks (IJCNN)  
This paper investigates how to mitigate such problems using a nested-loop recurrent neural network architecture to control a PMSM.  ...  Even in a highly dynamic switching environment, the neural vector controller shows strong ability to trace rapidly changing reference commands, tolerate system disturbances, and satisfy control requirements  ...  PERFORMANCE EVALUATION OF NESTED-LOOP NEURAL NETWORK CONTROLLER evaluate the current-and speed-loop neural network controllers, an integrated transient simulation of a complete PMSM system is developed  ... 
doi:10.1109/ijcnn.2013.6707124 dblp:conf/ijcnn/LiFFWA13 fatcat:2hujxozurfhs3jygiztp54kkra

Integrated ridesharing services with chance-constrained dynamic pricing and demand learning [article]

Tai-Yu Ma, Sylvain Klein
2020 arXiv   pre-print
A new constrained dynamic pricing model is proposed to maximize operator profit, taking into account the correlated structure of different modes of transport.  ...  We evaluate the proposed methodology through simulations under different scenarios on a test network by considering the interactions of supply and demand in a multimodal market.  ...  the inclusive value related to nest m, which measures the aggregate attractiveness of that nest, defined as Fig. 3 . 3 Nested structure of choice options for a traveler's mode choice decision , considering  ... 
arXiv:2001.09151v2 fatcat:dxgzsimr6rcn7kvjdggup7b6ge

Perspective: Mechanics of randomly packed filaments – the `bird nest' as meta-material [article]

Nicholas Weiner and Yashraj Bhosale and Mattia Gazzola and Hunter King
2019 arXiv   pre-print
Systems of randomly packed, macroscopic elements, from jammed spherical grains to tangled long filaments, represent a broad class of disordered meta-materials with a wide range of applications and manifestations  ...  All of these randomly packed systems exhibit forms of self assembly, evident through their robust packing statistics, and a common, unusual elastoplastic response to oedometric compression.  ...  This implies that both storage and dissipation of energy from dynamic forcing would be non-trivially dependent on the frequency.  ... 
arXiv:1911.00163v1 fatcat:mb2bgjsc7badfdgr6qtplutexq

Discovering dynamic functional networks in the human neonatal brain with electric source imaging [article]

Steve Mehrkanoon
2020 arXiv   pre-print
These functional networks encompass the default mode, primary sensory-limbic system, thalamo-frontal, thalamo-sensorimotor and visual-limbic system confined in the delta and low-alpha frequency intervals  ...  The temporal dynamics of these networks not only are nested within much slower timescale (<0.1 Hz) but also correlated in a hierarchical leading-following organisation.  ...  As part of the Financial Incentive Agreement between the University of Queensland and the Queensland Government of Australia, this study uses the previously published EEG data by Professor Paul Colditz  ... 
arXiv:1902.03725v2 fatcat:ojnaak4lbrdzfagedjwiactwn4
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