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Connected Components at Scale via Local Contractions [article]

Jakub Łącki, Vahab Mirrokni, Michał Włodarczyk
2018 arXiv   pre-print
As a fundamental tool in hierarchical graph clustering, computing connected components has been a central problem in large-scale data mining.  ...  In particular, we present a simple algorithm based on contractions and provide a scalable implementation of it in MapReduce.  ...  Related work As a fundamental problem in large-scale data mining, computing connected components has been studied extensively in the literature [FCL + 16, CDSMR13, KLM + 14, LCD + 17, SBF12, SRT18]  ... 
arXiv:1807.10727v1 fatcat:schoy4tv7zapvpkcnaarqpcgea

Derivation of a finite-element model of lingual deformation during swallowing from the mechanics of mesoscale myofiber tracts obtained by MRI

Srboljub M. Mijailovich, Boban Stojanovic, Milos Kojic, Alvin Liang, Van J. Wedeen, Richard J. Gilbert
2010 Journal of applied physiology  
at its inferior-most position; and 3) dominant clockwise rotation related to regional contraction of the genioglossus and contraction of the hyoglossus following anterior displacement.  ...  Material properties of individual elements were depicted in terms of Hill's three-component phenomenological model, assuming that the FE mesh was composed of anisotropic muscle and isotropic connective  ...  In these experiments, we ascertained 3D fiber direction at microscopic scales with microscopy and then correlated these values with mesoscale determinations of fiber direction obtained via DSI.  ... 
doi:10.1152/japplphysiol.00493.2010 pmid:20689096 pmcid:PMC2980378 fatcat:jypiiozzlfaxxjuhqjnd65gbbq

Molecular motors robustly drive active gels to a critically connected state

José Alvarado, Michael Sheinman, Abhinav Sharma, Fred C. MacKintosh, Gijsje H. Koenderink
2013 Nature Physics  
Here we show experimentally that myosin motors contract crosslinked actin polymer networks to clusters with a scale-free size distribution.  ...  There is evidence that network crosslinking is required to allow motors to induce macroscopic contraction. Yet a quantitative understanding of how network connectivity enables contraction is lacking.  ...  In between the two limits of global and local contractions, we find critically connected networks with a scale-free distribution of clusters.  ... 
doi:10.1038/nphys2715 fatcat:ikysnmpplzc4lbdj4gq7inydfm

New concepts in relation to urge and detrusor activity

Bo L. R. A. Coolsaet, Wim A. Van Duyl, Pooran Van Os-Bossagh, Hans V. De Bakker
1993 Neurourology and Urodynamics  
Local contractions can occur without an increase in tension or pressure, because other pans are in antiphase.  ...  Local contractions stretch surrounding tissues, which can stimulate fast stretch receptors. Synchronisation of these micromotion phenomena appears to be possible.  ...  A catheter (8 Fr) was introduced in the bladder via the urethra. The catheter was connected to a pressure transducer via a Y-connector (Fig. 4) .  ... 
doi:10.1002/nau.1930120504 pmid:8252050 fatcat:potzeomvnneqxgrbuuxvvvcydm

Distributed Anomaly Detection and Estimation over Sensor Networks: Observational-Equivalence and Q-Redundant Observer Design [article]

Mohammadreza Doostmohammadian, Themistoklis Charalambous
2022 arXiv   pre-print
In this paper, we study stateless and stateful physics-based anomaly detection scenarios via distributed estimation over sensor networks.  ...  The distributed aspect of the proposed detection algorithm enables local isolation of the faulty sensors with possible recovery solutions by adding redundant observationally-equivalent sensors.  ...  Using graph-theory (structural methods), we first define the set of observationally-equivalent sensors/stateoutputs using strongly-connected-components (SCCs) and contractions in the system digraph.  ... 
arXiv:2204.01549v1 fatcat:67ysdj3qsfh2tiyo3s3c5pjqxe

Improved scaling simulation of the general reconfigurable mesh [chapter]

José Alberto Fernández-Zepeda, Ramachandran Vaidyanathan, Jerry L. Trahan
1999 Lecture Notes in Computer Science  
In this paper, we present a scaling simulation for the general unconstrained R-Mesh.  ...  This simulation has an overhead of log N smaller than the log P log N P overhead of the previous fastest scaling simulation, using a CREW LRN-Mesh a weaker version of the General R-Mesh as the simulating  ...  Trahan and Vaidyanathan 13 have shown that, for certain restrictions of local connections, the RMBM a recon gurable bus-based model has a strong scaling simulation.  ... 
doi:10.1007/bfb0097946 fatcat:r6odxsqiqvfzzjrjeduopu3d5i

Active contractility in actomyosin networks

S. Wang, P. G. Wolynes
2012 Proceedings of the National Academy of Sciences of the United States of America  
Cooperative action of load-resisting motors in a force-percolating structure integrates local contraction/buckling events into a global contractile state via an active coarsening process, in contrast to  ...  Recent experiments on reconstituted actomyosin networks, the major component of the contractile machinery, have shown that active contractility occurs above a threshold motor concentration and within a  ...  This article contains supporting information online at doi:10.1073/pnas.1204205109/-/DCSupplemental. ACKNOWLEDGMENTS.  ... 
doi:10.1073/pnas.1204205109 pmid:22493220 pmcid:PMC3340076 fatcat:7brxp3vzerbynbzqy3sgepzlf4

Multimapper: Data Density Sensitive Topological Visualization

Bishal Deb, Ankita Sarkar, Nupur Kumari, Akash Rupela, Piyush Gupta, Balaji Krishnamurthy
2018 2018 IEEE International Conference on Data Mining Workshops (ICDMW)  
To achieve this, we replace global scale selection of cover with a scale selection scheme sensitive to local density of data points.  ...  We also propose a method to detect some deviations in Mapper from Reeb space via computation of persistence features on the Mapper graph.  ...  ) (18) Since β 0 is the number of connected components, persistence on Mapper via Multiscale Mapper gives us a clusterindependent way to compute the number of connected components in the data.  ... 
doi:10.1109/icdmw.2018.00153 dblp:conf/icdm/DebSKRGK18 fatcat:qqceeyasyvdt3eiio4tnp37y54

Fast Approximations for Rooted Connectivity in Weighted Directed Graphs [article]

Kent Quanrud
2021 arXiv   pre-print
Additionally, moduling scaling, the sink component of an -cut in with capacity at most and at most vertices in the sink component is preserved in 0 , and the corresponding cut in 0 has weight at most an  ...  These algorithms are based on local algorithms for vertex connectivity and influence the local algorithms that appear in this work.  ... 
arXiv:2104.06933v1 fatcat:75komo6ua5a5bf5gao43idyouu

Review: How dynamic prestress governs the shape of living systems, from the subcellular to tissue scale [article]

Alexander Erlich, Jocelyn Étienne, Jonathan Fouchard, Tom Wyatt
2022 arXiv   pre-print
We suggest that in addition to growth and contraction, a third type of prestress -- topological prestress -- can result from active processes altering the microstructure of tissue.  ...  Despite the diversity of scale and organisation, we demonstrate that these phenomena stem from a limited number of spatial distributions of prestress, which can be categorised as heterogeneous, anisotropic  ...  (active contraction or growth) occurs at time scales much larger than elastodynamics.  ... 
arXiv:2209.01440v2 fatcat:fm54wsyolffkfaop43osexi7cq

RAIDER: Responsive architecture for inter-domain economics and routing

Nirmala Shenoy, Murat Yuksel, Aparna Gupta, Koushik Kar, Victor Perotti, Manish Karir
2010 2010 IEEE Globecom Workshops  
ISP C is at tier 2 and connected to ISP A (via CloudAddr 2.1:1) and ISP B (CloudAddr 2.2:1) simultaneously, where the CloudAddr format is TierValue.ParentCloudID:MyCloudID.  ...  In general, contracting at the lower tiers (i.e. higher tier values) of the FCT network cloud will involve shorter time-scales and durations than those at upper tiers (i.e. lower tier values).  ... 
doi:10.1109/glocomw.2010.5700334 fatcat:dnhtscl2nrcr5hwacpukb6tcu4

Multi-scale lung modeling

Merryn H. Tawhai, Jason H. T. Bates
2011 Journal of applied physiology  
insights gained from understanding how collections of system components at one level of scale conspire to produce qualitatively different behavior at higher levels.  ...  events to accurately describe the contraction dynamics of a cell, nor is it necessary to invoke all phenomena observable at the level of the cell to account for the changes in overall lung function that  ...  These "large scale" components couple to the "microscale" at each precapillary artery and vein via elastic recoil and blood pressures.  ... 
doi:10.1152/japplphysiol.01289.2010 pmid:21292842 pmcid:PMC3098667 fatcat:an5gckauebdldab7iyek4fmbcq

Evaluation of connected-component labeling algorithms for distributed-memory systems

J. Iverson, C. Kamath, G. Karypis
2015 Parallel Computing  
Under weak scaling and for certain classes of graphs, the graph contraction algorithm scales consistently better than the four other algorithms.  ...  There have been several distributed-memory connected component algorithms described in literature; however, little has been done regarding their scalability analysis.  ...  Lucy Nowell, program manager, ASCR), and the Digital Technology Center at the University of Minnesota.  ... 
doi:10.1016/j.parco.2015.02.005 fatcat:krzo3cgvy5hvbm7tolyh23jjlq

Design and Fabrication of a Responsive Carrier Component Envelope

Teng-Wen Chang, Hsin-Yi Huang, Sambit Datta
2019 Buildings  
at the Shenzhen MakerFaire Exhibition.  ...  We test the kinetic responsiveness of the RCCE with material constraints and simulate responses by connecting the adaptive components with programmable input and behavior.  ...  A few 3D-printed components were used to connect assembly at key intersections with unique angles.  ... 
doi:10.3390/buildings9040084 fatcat:qswvnhhiuzgyjmn6lu5o6x3cku

Synchronization of spontaneous contraction activity in smooth muscle of urinary bladder

W. A. Van Duyl, A. A. M. Van Der Hoeven, J. V. De Bakker
1990 Neurourology and Urodynamics  
a small scale as we did in vitro, in which situation we found tissue never at rest and furthermore that local motions do not necessarily result in detectable variations in the overall force.  ...  by these spontaneous contractions via afferent stimuli.  ... 
doi:10.1002/nau.1930090511 fatcat:2av4go5et5fgjboy5kg4otmahi
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