Results 81 to 90 of about 9,859,885 (301)

Sub-fractional Brownian motion and its relation to occupation times [PDF]

We study a long-range dependence Gaussian process which we call “sub-fractional Brownian motion” (sub-fBm), because it is intermediate between Brownian motion (Bm) and fractional Brownian motion (fBm) in the sense that it has properties analogous to ...
Luis G. Gorostiza, Anna Talarczyk, Tomasz Bojdecki   +2 more
core  

Particle swarm optimization: dynamical analysis through fractional calculus [PDF]

, 2009
This chapter considers the particle swarm optimization algorithm as a system, whose dynamics is studied from the point of view of fractional calculus. In this study some initial swarm particles are randomly changed, for the system stimulation, and its ...
P. B. de Moura Oliveir, Oliveira, P. B. Moura, E. J. Solteiro Pires, Pires, E. J. Solteiro, J. A. Tenreiro Machado, Machado, J. A. Tenreiro   +5 more
core   +1 more source

Ground-state properties of anyons in a one-dimensional lattice

New Journal of Physics, 2015
Using the Anyon–Hubbard Hamiltonian, we analyze the ground-state properties of anyons in a one-dimensional lattice. To this end we map the hopping dynamics of correlated anyons to an occupation-dependent hopping Bose–Hubbard model using the fractional ...
Guixin Tang, Sebastian Eggert, Axel Pelster   +2 more
doaj   +1 more source

Aerosol particle number concentration, ultrafine particle number fraction, and new particle formation measurements near the international airports in Berlin, Germany – First results from the BEAR study

Environment International
Studies revealed airports as a prominent source of ultrafine particles (UFP), which can disperse downwind to residential areas, raising health concerns. To expand our understanding of how air traffic-related emissions influence total particle number concentration (PNC) in the airport's surrounding areas, we conduct long-term assessment of airborne ...
Kecorius, S., Sues, S., Madueno, L., Wiedensohler, A., Winkler, U., Held, A., Lüchtrath, S., Beddows, D.C., Harrison, R.M., Lovrić, M., Soppa, V., Hoffmann, B., Wiese-Posselt, M., Kerschbaumer, A., Cyrys, J.   +14 more
openaire   +6 more sources

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Effect of Mach number and volume fraction in air-shock interacting with a bed of randomly distributed spherical particles

Physical Review Fluids, 2019
Shock interaction with a bed of randomly distributed particles leads to large variation in the drag forces, highlighting the impact of neighboring particles, and indicating a need for point-particle force models that account for this drag variation.
Y. Mehta, K. Salari, T. L. Jackson, S. Balachandar   +3 more
openaire   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source

Density Functional Theory for Fractional Particle Number: Derivative Discontinuity of the Energy at the Maximum Number of Bound Electrons

, 2011
The derivative discontinuity in the exact exchange-correlation potential of ensemble Density Functional Theory (DFT) is investigated at the specific integer number that corresponds to the maximum number of bound electrons, $J_{max}$. A recently developed complex-scaled analog of DFT is extended to fractional particle numbers and used to study ensembles
Whitenack, Daniel L., Zhang, Yu, Wasserman, Adam   +2 more
openaire   +2 more sources

Directed evolution of enzymes at the crossroads of tradition and innovation

FEBS Open Bio, EarlyView.
An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova, Andrej Mirossay, Erik Sedlak   +2 more
wiley   +1 more source

Functional Limit Theorems for Occupation Time Fluctuations of Branching Systems in the Case of Long-Range Dependence [PDF]

Functional central limit theorem; Occupation time uctuation; Branching particle system; Distribution-valued Gaussian process; Fractional Brownian motion; Sub-fractional Brownian motion; Long-range ...
Luis G. Gorostiza, A. Talarczyk, T. Bojdecki   +2 more
core