Results 41 to 50 of about 11,177,426 (256)

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

The Distribution and Quantiles of the Sample Mean from a Stationary Process

Axioms
Edgeworth–Cornish–Fisher expansions are hugely important, as they give the distribution, density and quantiles of any standard estimate. Here we show that the sample mean of a univariate or multivariate stationary process is a standard estimate, so that ...
Christopher S. Withers
doaj   +1 more source

Maximum Likelihood Drift Estimation for Gaussian Process with Stationary Increments

Austrian Journal of Statistics, 2017
The paper deals with the regression model X_t = \theta t + B_t , t\in[0, T ], where B=\{B_t, t\geq 0\} is a centered Gaussian process with stationary increments.
Yuliya Mishura, Kostiantyn Ralchenko, Sergiy Shklyar   +2 more
doaj   +1 more source

Reconsidering Dogmas about the Growth of Bacterial Populations

Cells, 2023
The growth of bacterial populations has been described as a dynamic process of continuous reproduction and cell death. However, this is far from the reality.
Bettina Ughy, Sarolta Nagyapati, Dezi B. Lajko, Tamas Letoha, Adam Prohaszka, Dima Deeb, Andras Der, Aladar Pettko-Szandtner, Laszlo Szilak   +8 more
doaj   +1 more source

DNA ligase LigE increases bacterial transformation with damaged extracellular DNA

FEBS Letters, EarlyView.
The DNA ligase LigE from the naturally competent Gram‐negative bacterium Neisseria gonorrhoaea increases transformation with cut extracellular DNA. This process is ATP‐dependent and relies on the catalytic activity of LigE; it also requires that LigE contains an intact periplasmic localisation sequence, indicating that ligE functions in the periplasm ...
Jolyn Pan, Avi Singh, Shrawani Weralupe Gamladdalage, Joanna Hicks, Adele Williamson   +4 more
wiley   +1 more source

Countable representation for infinite-dimensional diffusions derived from the two parameter Poisson Dirichlet process [PDF]

, 2009
This paper provides a countable representation for a class of infinite-dimensional diffusions which extends the infinitely-many-neutral-alleles model and is related to the two-parameter Poisson-Dirichlet process. By means of Gibbs sampling procedures, we
Ruggiero, Matteo, Walker, Stephen G., Stephen G. Walker, Matteo Ruggiero   +3 more
core   +1 more source

Use of infinity concept in chemistry and chemical technology

Тонкие химические технологии, 2011
The paper considers a number of mathematical models of chemical and chemical-engineering objects that use the concept of infinity. We allocated almost unrealizable processes, in the simulation of which infinity shows itself as a phantom.
L. A. Serafimov, A. K. Frolkova, L. A. Khakhin   +2 more
doaj  

Recent insights into the molecular mechanism of ubiquinol oxidation by cytochrome bc1

FEBS Open Bio, EarlyView.
The review reflects on the mechanism of the catalytic reaction in cytochrome bc1: the electron bifurcation that involves the separation of two electrons derived from the quinol oxidation to opposite sides of the enzyme across the membrane. This review summarizes the long‐standing effort to understand the mechanism of quinol oxidation catalyzed by ...
Anna Wójcik‐Augustyn, Artur Osyczka, Marcin Sarewicz   +2 more
wiley   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Exact Integration of Stationary Gaussian Process Kernels

IEEE Open Journal of Signal Processing
In applications such as object tracking and financial time series, it is often desirable to model stochastic processes that are the integral of another stationary process, leading potentially to non-stationarity and infinite variance.
Ralph J. McDougall, Tim Hargreaves, Simon J. Godsill   +2 more
doaj   +1 more source