Results 61 to 70 of about 1,196,383 (294)
Perturbation determinants for singular perturbations
Russian Journal of Mathematical Physics, 2014 For proper extensions of a densely defined closed symmetric operator with trace class resolvent difference the perturbation determinant is studied in the framework of boundary triplet approach to extension theory.
Malamud, Mark M., Neidhardt, Hagen
openaire +4 more sources
Perturbation Theory for Parent Hamiltonians of Matrix Product States
, 2015 This article investigates the stability of the ground state subspace of a canonical parent Hamiltonian of a Matrix product state against local perturbations.
Szehr, Oleg, Wolf, Michael M.
core +1 more source
Post-Wick theorems for symbolic manipulation of second-quantized expressions in atomic many-body perturbation theory [PDF]
, 2009 Manipulating expressions in many-body perturbation theory becomes unwieldily with increasing order of the perturbation theory. Here I derive a set of theorems for efficient simplification of such expressions.
Andrei Derevianko +5 more
core +1 more source
FEBS Letters, EarlyView.This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva +5 more
wiley +1 more source
The Effect of the 2015 Earthquake on the Bacterial Community Compositions in Water in Nepal
Frontiers in Microbiology, 2017 We conducted a study to examine the effect of seasonal variations and the disruptive effects of the 2015 Nepal earthquake on microbial communities associated with drinking water sources.
Sital Uprety +8 more
doaj +1 more source
An Efficient Chicken Search Optimization Algorithm for the Optimal Design of Fuzzy Controllers
Axioms, 2021 A proposed architecture to design the optimal parameters of Membership Functions (MFs) of Type-1 Fuzzy Logic Systems (T1FLSs) using the Chicken Search Optimization (CSO) is applied to three Fuzzy Logic Controllers (FLCs) in this paper.
Leticia Amador-Angulo +3 more
doaj +1 more source
Adiabatic Spectra During Slowly Evolving
, 2011 In general, for single field, the scale invariant spectrum of curvature perturbation can be given by either its constant mode or its increasing mode. We show that during slowly expanding or contracting, the spectrum of curvature perturbation given by its
Albrecht +51 more
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Cell wall target fragment discovery using a low‐cost, minimal fragment library
FEBS Letters, EarlyView.LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan +5 more
wiley +1 more source
Position and Attitude Tracking of MAV Quadrotor Using SMC-Based Adaptive PID Controller
Drones, 2022 A micro air vehicle (MAV) is physically lightweight, such that even a slight perturbation could affect its attitude and position tracking. To attain better autonomous flight system performance, MAVs require good control strategies to maintain their ...
Aminurrashid Noordin +2 more
doaj +1 more source
Rayleigh-Schroedinger-Goldstone variational perturbation theory for many fermion systems
, 2004 We present a Rayleigh-Schroedinger-Goldstone perturbation formalism for many fermion systems. Based on this formalism, variational perturbation scheme which goes beyond the Gaussian approximation is developed.
Chul Koo Kim +23 more
core +2 more sources