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A theory of independent mechanisms for extrapolation in generative models [article]

Michel Besserve, Rémy Sun, Dominik Janzing, Bernhard Schölkopf
2021 arXiv   pre-print
We develop a theoretical framework to address this challenging situation by defining a weaker form of identifiability, based on the principle of independence of mechanisms.  ...  An intuitive idea to promote such extrapolation capabilities is to have the architecture of such model reflect a causal graph of the true data generating process, such that one can intervene on each node  ...  A causal model allows the different mechanisms involved in generating the data to be intervened on independently, based on the principle of Independent Causal Mechanisms Lemeire & Janzing, 2012; Peters  ... 
arXiv:2004.00184v2 fatcat:iff22jbatfhc7pt5n62mynolrm

Reconstructing Supersymmetric Theories at the Linear Collider [article]

Grahame A. Blair
2000 arXiv   pre-print
High precision measurements at the linear collider will allow a model- independent reconstruction of nature at high energy scales.  ...  The method of bottom-up extrapolation from the electroweak scale to the GUT scale is explained and both a universal minimal supergravity and a gaugino-mediated model are presented as examples.  ...  For these reasons a model-independent method is adopted where the structure of the theory is extrapolated via the renormalisation group equations (RGEs) from low-energy to high energy, with input to the  ... 
arXiv:hep-ph/0011367v1 fatcat:jdissu7zvrbdvph4wqmhhuhywq

Mechanisms and Laws: Clarifying the Debate [chapter]

Carl F. Craver, Marie I. Kaiser
2013 Mechanism and Causality in Biology and Economics  
In doing so, he enters a long-standing discussion about the relationship between the mechanistic structures evident in the theories of contemporary biology and the laws of nature privileged especially  ...  in traditional empiricist traditions of the philosophy of science (see e.g. ).  ...  for any theory of p-laws has a solution.  ... 
doi:10.1007/978-94-007-2454-9_7 fatcat:r6dmuim4fbeudc2yfwtd5e5o3e

Numerical investigations of Supersymmetric Yang-Mills Quantum Mechanics with 4 supercharges [article]

Zbigniew Ambrozinski, Piotr Korcyl
2014 arXiv   pre-print
It allowed us to calculate for the first time the spectrum of the model with SU(3) symmetry in all fermionic sectors.  ...  We report on our non-perturbative investigations of supersymmetric Yang-Mills quantum mechanics with 4 supercharges. We employ two independent numerical methods.  ...  Acknowledgments P.K. thanks A. Ramos and A. Joseph for many discussions and M. Koreń for valuable discussions and for writting an independent code.  ... 
arXiv:1411.6904v2 fatcat:5hkl3le7djb7rbug4xmswxqhrq

Hβ Stark broadening in cold plasmas with low electron densities calibrated with Thomson scattering

J.M. Palomares, S. Hübner, E.A.D. Carbone, N. de Vries, E.M. van Veldhuizen, A. Sola, A. Gamero, J.J.A.M. van der Mullen
2012 Spectrochimica Acta Part B - Atomic Spectroscopy  
A Stark broadening theory is extrapolated to lower electron density values, below its theoretical validity regime. Thomson scattering measurements are used to calibrate and validate the procedure.  ...  A line fitting procedure is used to separate the effects of the different broadening mechanisms (e.g. Doppler and instrumental broadening) from the Stark broadening.  ...  Acknowledgments This work is supported and financed by the Dutch Technology Foundation STW under the project numbers 10744 and 10497 and the bilateral relation between the University in Eindhoven (the  ... 
doi:10.1016/j.sab.2012.07.005 fatcat:2hgcny6sinhx3fsfe4btqqnh6y

Exploring an Information Framework for Consistency Maintenance in Distributed Interactive Applications

Xin Zhang, Tomás Ward, Séamus Mcloone
2009 2009 13th IEEE/ACM International Symposium on Distributed Simulation and Real Time Applications  
Predictive contract mechanisms are techniques that compensate for the effect of network latency by extrapolating future entity states from historical records.  ...  This paper explores the use of an information metric to analyse the effect of network latency on remote consistency and thus establishes a novel framework to model predictive contract mechanisms as a lossy  ...  ACKNOWLEDGMENT This work is supported by the Irish Research Council for Science, Engineering and Technology (IRCSET): funded by the National Development Plan.  ... 
doi:10.1109/ds-rt.2009.23 dblp:conf/dsrt/ZhangWM09 fatcat:eynhmallp5ghrg4dpvoya2pabm

Motion-based predictive coding is sufficient to solve the aperture problem

Mina A Khoei, Laurent U Perrinet, Guillaume S Masson
2011 BMC Neuroscience  
Then,when presented with an object with a regular translation, the dynamical system grabs itsmotion independently of its shape and exhibits motion extrapolation.  ...  Here, we test this functional model for the aperture problem in the visual and haptic low-level sensory areas.  ...  Then,when presented with an object with a regular translation, the dynamical system grabs itsmotion independently of its shape and exhibits motion extrapolation.  ... 
doi:10.1186/1471-2202-12-s1-p279 pmcid:PMC3240388 fatcat:3ze2duqr6beuhdw2hjkqtme36a

What is learned in sequential learning? An associative model of reward magnitude serial-pattern learning

Douglas G. Wallace, Stephen B. Fountain
2002 Journal of Experimental Psychology Animal Behavior Processes  
A computational model of sequence learning is described that is based on pairwise associations and generalization.  ...  In 2 other studies, the model also simulated behavioral "rule generalization," "extrapolation," and associative transfer data motivated by both rulelearning and associative perspectives.  ...  Given SPAM's success in our earlier studies, one might imagine that SPAM would be a particularly good candidate model for accounting for extrapolation behavior if a sufficient associative mechanism actually  ... 
doi:10.1037/0097-7403.28.1.43 pmid:11868234 fatcat:7yufaud5kne4fici5dmitcg4p4

What is learned in sequential learning? An associative model of reward magnitude serial-pattern learning

Douglas G. Wallace, Stephen B. Fountain
2002 Journal of Experimental Psychology Animal Behavior Processes  
A computational model of sequence learning is described that is based on pairwise associations and generalization.  ...  In 2 other studies, the model also simulated behavioral "rule generalization," "extrapolation," and associative transfer data motivated by both rulelearning and associative perspectives.  ...  Given SPAM's success in our earlier studies, one might imagine that SPAM would be a particularly good candidate model for accounting for extrapolation behavior if a sufficient associative mechanism actually  ... 
doi:10.1037//0097-7403.28.1.43 pmid:11868234 fatcat:r3st5tbetjbfjeo745sq7pc5wy

Can Test-Tube Evolution Explain Biodiversity?

Tadeusz J. Kawecki
2015 Trends in Ecology & Evolution  
Experimental Evolution and the Nature of Biodiversity, by Rees Kassen, Roberts and Company, 2014, [price] ISBN 978-1-936221-46-2 Trends in Ecology and Evolution 30: 568-569.  ...  Thus, a general theory of diversification called for in the last chapter will require a synthesis of ecology and genetics of adaptation (and, for sexual organisms, of reproductive isolation [8] ).  ...  The focus on general models of adaptation leaves out some more specific topics, such as the evolution of parasite virulence, on which there is both rich theory and substantial body of data from microbial  ... 
doi:10.1016/j.tree.2015.07.011 fatcat:4i2ilipcijandlsnvriiko4wci

Dynamical Chiral Symmetry Breaking in Strongly Coupled Gauge Theories with Scalars

W. Franzki, C. Frick, J. Jersák, X. Q. Luo
1996 Progress of Theoretical Physics Supplement  
We study the chiral symmetry breaking in the strongly coupled compact U(1) gauge theory with charged fermions and scalars.  ...  The scalar field induces a symmetry restoring second order phase transition and shields the confining forces, so that a heavy non-confined fermion exists in the spectrum.  ...  This "shielded gauge mechanism" of fermion mass generation 6 > is also of general interest for quantum field theory, as it addresses the question of existence of 4D field theories strongly coupled at short  ... 
doi:10.1143/ptps.122.171 fatcat:kkaqr5r5evdoxgjbzepeqkjvle

MODELS AND THEORY FOR UREA METABOLISM

PA CHARLWOOD
1965 Biochemical Journal  
The basic model used in the present study (Scheme 1) envisages an overall steady state, i.e. total mass (Me) of urea in any compartment i is independent of time (except, of course, in this instance for  ...  The broken line represents the urine curve for a frontal delay mechanism.  ... 
doi:10.1042/bj0950533 pmid:14340104 pmcid:PMC1214353 fatcat:sjrztl4exjfr7appek6c2cy6na

A review of DEB theory in assessing toxic effects of mixtures

Jan Baas, Tjalling Jager, Bas Kooijman
2010 Science of the Total Environment  
In contrast to the more classical way of interpreting effects of mixtures with concentration addition or effect addition models, DEB theory offers a single consistent framework to understand effects of  ...  In this manuscript we review the use of mechanistic models to interpret effects of mixtures of compounds within the framework of the Dynamic Energy Budget (DEB) theory.  ...  So different compounds can have largely independent toxicokinetics, but an effect on body size of one of the constituents in a mixture influences toxicokinetics for all components in a mixture in the same  ... 
doi:10.1016/j.scitotenv.2009.09.037 pmid:19850324 fatcat:iq5ljuqsozdxlcwpjlxofqwzza

Evidence amalgamation in the sciences: an introduction

Samuel C. Fletcher, Jürgen Landes, Roland Poellinger
2018 Synthese  
for evidence amalgamation, its bearing on questions of extrapolation and external validity of experiments, its connection with theory development, and its interface with causal inference, especially regarding  ...  causal theories of cancer.  ...  All guest editors would like to thank Barbara Osimani for her role in brining about this SI as an initial member of the team.  ... 
doi:10.1007/s11229-018-1840-6 fatcat:a4wbsuw3wjcqlboz3eob34qcha

Page 7386 of Mathematical Reviews Vol. , Issue 98K [page]

1998 Mathematical Reviews  
. (1-IASP; Princeton, NJ) Generalized Green-Schwarz mechanism in F theory.  ...  This point of view provides a uniform derivation of the matrix model for M-theory compactified on a transverse torus 7” for p=0,---,5 and clarifies the difficulties for larger values of p.” 98k:81242 81730  ... 
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