Results 71 to 80 of about 7,625,136 (322)

Perturbation theory for Markov chains via Wasserstein distance [PDF]

Bernoulli, 2015
Perturbation theory for Markov chains addresses the question how small differences in the transitions of Markov chains are reflected in differences between their distributions.
Daniel Rudolf, Nikolaus Schweizer
semanticscholar   +1 more source

Nonlinearized Perturbation Theories

Journal of Nonlinear Mathematical Physics, 1996
A brief review is presented of two recent perturbation algorithms. Their common idea lies in a not quite usual treatment of linear Schrödinger equations via nonlinear mathematical tools. The first approach (it is called a quasi-exact perturbation theory, QEPT) tries to get the very zero-order approximations already ``almost exact'', at a cost of ...
openaire   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Low-Shear QCD Plasma from Perturbation Theory

Proceedings, 2019
We argue that the inferred ratio of shear viscosity to entropy density of the quark-gluon plasma, h/s < 0.5 near the deconfinement temperature Tc, can be understood from perturbative QCD.
Greg Jackson, Andre Peshier
doaj   +1 more source

Large scale structure of the universe and cosmological perturbation theory [PDF]

, 2001
We review the formalism and applications of non-linear perturbation theory (PT) to understanding the large-scale structure of the Universe. We first discuss the dynamics of gravitational instability, from the linear to the non-linear regime.
F. Bernardeau, S. Colombi, E. Gaztañaga, R. Scoccimarro, R. Scoccimarro   +4 more
semanticscholar   +1 more source

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

Form factor π0γ*γ in lightcone sum rules combined with renormalization-group summation vs experimental data. [PDF]

EPJ Web of Conferences, 2019
We consider the lightcone sum-rule (LCSR) description of the pionphoton transition form factor in combination with the renormalization group of QCD.
Ayala C., Mikhailov S. V., Pimikov A. V., Stefanis N. G.   +3 more
doaj   +1 more source

Projected Quasi-particle Perturbation theory

, 2012
The BCS and/or HFB theories are extended by treating the effect of four quasi-particle states perturbatively. The approach is tested on the pairing hamiltonian, showing that it combines the advantage of standard perturbation theory valid at low pairing ...
A. Anzalone, A. Chbihi, A. Grzeszczuk, A. Pagano, A. Pop, A. Trifirò, B. Borderie, C. Maiolino, E. De Filippo, E. De Filippo, E. Galichet, E. Geraci, E. La Guidara, E. Piasecki, E. Rosato, F. Amorini, F. Porto, F. Rizzo, G. Cardella, G. Lanzalone, G. Lanzanò, G. Politi, G. Verde, I. Berceanu, I. Lombardo, I. Skwira-Chalot, J. Frankland, J. P. Wieleczko, J. Wilczyński, K. Schmidt, K. Siwek-Wilczyńska, L. Auditore, L. Zetta, M. B. Chatterjee, M. Bruno, M. Colonna, M. D'Agostino, M. Di Toro, M. F. Rivet, M. Papa, M. Trimarchi, M. Vigilante, N. Le Neindre, P. Guazzoni, P. Russotto, P. Russotto, R. Bougault, R. Dayras, R. Płaneta, S. Cavallaro, S. Kowalski, S. Pirrone, T. Cap, V. Baran, W. Gawlikowicz, W. Zipper   +55 more
core   +6 more sources

In vitro models of cancer‐associated fibroblast heterogeneity uncover subtype‐specific effects of CRISPR perturbations

Molecular Oncology, EarlyView.
Development of therapies targeting cancer‐associated fibroblasts (CAFs) necessitates preclinical model systems that faithfully represent CAF–tumor biology. We established an in vitro coculture system of patient‐derived pancreatic CAFs and tumor cell lines and demonstrated its recapitulation of primary CAF–tumor biology with single‐cell transcriptomics ...
Elysia Saputra, Shamsudheen Karuthedath Vellarikkal, Lixia Li, Hong Sun, Khoa Nguyen, Amber Montano, Suchitra Natarajan, Federica Piccioni, Alex Michael Tamburino, Xin Yu, Aleksandra Katarzyna Olow   +10 more
wiley   +1 more source

Transcriptional network analysis of PTEN‐protein‐deficient prostate tumors reveals robust stromal reprogramming and signs of senescent paracrine communication

Molecular Oncology, EarlyView.
Combining PTEN protein assessment and transcriptomic profiling of prostate tumors, we uncovered a network enriched in senescence and extracellular matrix (ECM) programs associated with PTEN loss and conserved in a mouse model. We show that PTEN‐deficient cells trigger paracrine remodeling of the surrounding stroma and this information could help ...
Ivana Rondon‐Lorefice, Jose I. Lopez, Aitziber Ugalde‐Olano, Maite Zufiaurre, Ianire Astobiza, Natalia Martin‐Martin, Laura Bozal‐Basterra, Saioa Garcia‐Longarte, Amaia Zabala‐Letona, Sofia Rey, Aida Santos‐Martin, Miguel Unda, Ana Loizaga‐Iriarte, Mariona Graupera, Paolo Nuciforo, Arkaitz Carracedo, Isabel Mendizabal   +16 more
wiley   +1 more source