Results 131 to 140 of about 23,387 (277)

Renormalization techniques for inflation systems and some of their applications

Acta Crystallographica Section A, EarlyView.
In this work, renormalization methods for quantities related to the diffraction of inflation systems are surveyed.Exact renormalization techniques are important and powerful, particularly for inflation‐generated systems. We review recent results in this direction.
Michael Baake, Franz Gähler, Anna Klick, Neil Mañibo, Jan Mazáč   +4 more
wiley   +1 more source

Similarity renormalization group evolution of N N interactions within a subtractive renormalization scheme

EPJ Web of Conferences, 2010
We apply the similarity renormalization group (SRG) approach to evolve a nucleon-nucleon (N N) interaction in leading-order (LO) chiral effective field theory (ChEFT), renormalized within the framework of the subtracted kernel method (SKM).
Durães F.O., Szpigel S., Timóteo V.S.
doaj   +1 more source

Renormalization, invariant tori, and periodic orbits for Hamiltonian flows

, 2001
textConsideration is given to a family of renormalization transformations developed to study the existence of invariant tori in Hamiltonian systems. These transformations are used to construct invariant tori with self–similar frequency vectors, as ...
Abad, Juan José, 1967-
core  

Drought and growing season phenology over 35 years modulates species interactions among domestic and wild herbivores

Journal of Animal Ecology, EarlyView.
Using a unique 35‐year dataset, this study shows that domestic livestock do not facilitate wild large herbivores as predicted by the grazing optimization hypothesis. Instead, competition caused avoidance of cattle by elk which intensified under drought, and highlights how climate change influences interactions among domestic and wild large herbivores ...
Joel Ruprecht, Tavis D. Forrester, Casey L. Brown, Lara F. Mengak, Michael J. Wisdom, Darren A. Clark, Taal Levi   +6 more
wiley   +1 more source

Microcrack connectivity in rocks: a real-space renormalization group approach for 3D anisotropic bond percolation

, 2016
The onset of microcrack conductivity in anisotropic rocks, which is a concern in hydraulic fracturing, was treated as a three-dimensional (3D) bond percolation problem where the bonds in the three orthogonal directions are presented with different ...
Chen JC, 袁泉子, 赵亚溥, Cheng CM, Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.   +4 more
core   +1 more source

Challenging and diagnosing structured population models by testing predictions from stochastic demography

Methods in Ecology and Evolution, EarlyView.
Abstract Structured population models are parameterized to accurately project expected population sizes, stage/state distributions and population growth rates, but they also predict the variation in outcomes among individuals, such as the variance and skewness of lifetime reproductive output (LRO) and lifespan, the probability of never reproducing, and
Stephen P. Ellner, Robin E. Snyder, Daniel T. Blumstein, Dylan Z. Childs, Joshua C. Fowler, Christina M. Hernández, Julien G. A. Martin, María Paniw, Yngvild Vindenes   +8 more
wiley   +1 more source

Organ‐Specific Cancer‐Associated Fibroblast Subtypes Across the Digestive System Linked to Cancer Hallmarks

Cancer Science, EarlyView.
We integrated 14 single‐cell RNA‐seq datasets and 18 bulk cohorts to define eight CAF subtypes in GI cancers. myCAF1 and myCAF2 promoted immunosuppressive, poor‐prognosis niches, whereas iCAF1 was linked to favorable prognosis and antitumor immunity.
Huaitao Wang, Takashi Semba, Atsuko Yonemura, Hiroshi Naito, Lingfeng Fu, Takuya Tajiri, Masaaki Iwatsuki, Takatsugu Ishimoto   +7 more
wiley   +1 more source

Renormalization group methods

, 1975
An especially intractable breed of problems in physics involves those with very many or an infinite number of degrees of freedom and in addition involve “renormalization.” Renormalization is explained as the existence of very many length or energy scales
Wilson, Kenneth G
core   +1 more source

Computing Skinning Weights via Convex Duality

Computer Graphics Forum, EarlyView.
We present an alternate optimization method to compute bounded biharmonic skinning weights. Our method relies on a dual formulation, which can be optimized with a nonnegative linear least squares setup. Abstract We study the problem of optimising for skinning weights through the lens of convex duality.
J. Solomon, O. Stein
wiley   +1 more source

MOMENTUM-SPACE MONTE-CARLO RENORMALIZATION-GROUP PROCEDURE

, 1991
We implement a momentum-space renormalization-group procedure into the Monte Carlo renormalization-group (MCRG) method. Usually the symmetries of the system must be known and incorporated into the renormalization group, but here we let the ...
Münger, Peter,, NOVOTNY, MA,
core   +1 more source