Results 141 to 150 of about 257,172 (325)

Fluorescence Lifetime Imaging Microscopy Analysis of Isolated Melanosomes

open access: yesChemPhysChem, EarlyView.
Using fast fluorescence lifetime imaging microscopy, the study tracks isolated bovine and porcine melanosomes during 60 min of 515 nm laser exposure. Two decay components lengthen progressively, while amplitude ratios shift, evidencing rapid photo‐oxidative and structural alterations of melanin.
Mykyta Kizilov   +3 more
wiley   +1 more source

Thermal–Hydraulic Performance of Nanofluids in Turbulent Separated Flow Induced by Double Forward Facing Step With Converging/Diverging Wall

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
Compared to experimental data of thermophysical properties of NFs, semi‐empirical models cannot estimate FOM correctly. For all working fluids, applying a converging channel instead of the canonical case was inefficient. Diverging channel was always favored compared to the canonical case. For less effective NFs, both lowering the reference velocity and
Mahmoud Jourabian, Mehrdad Raeesi
wiley   +1 more source

Roles of nanomagnetic beads on biosensing: From fabrication to application

open access: yesInterdisciplinary Medicine, EarlyView.
Leveraging their intrinsic superparamagnetic properties and rapid magnetic responsiveness, functionalized nanomagnetic beads have emerged as pivotal platforms in advanced biosensing system. Through surface engineering and structural design, these magnetic nanoparticles demonstrate multi‐capabilities, such as sample separation, signal enhancement, and ...
Junjie Li   +11 more
wiley   +1 more source

Extreme value theory for geometric Brownian motion and pricing of short maturity barrier options [PDF]

open access: yesarXiv
We investigate the limiting distribution of geometric Brownian motion conditional on its running maximum taking large values. We show that the conditional distribution of the geometric Brownian motion converges after a suitable normalization to a deterministic exponential curve. We obtain quantitative bounds on the rate of convergence.
arxiv  

Dimension for Martingales [PDF]

open access: yesarXiv, 2012
A martingale \int H.dZ is defined as having Dimension k if H has rank k almost surely, almost all t. Dimension can be used as a geometric invariant to classify and study martingales. We also define general Brownian motions in higher dimensions.
arxiv  

Functional Pulmonary Imaging

open access: yesJournal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT The aging of the world population gave rise to an increased prevalence of many lung diseases, with chronic obstructive pulmonary disease now ranking as the third‐leading cause of death according to the World Health Organization. To diagnose lung disease, a thorough assessment of lung function is essential since it may reveal unique signatures ...
Agilo L. Kern   +4 more
wiley   +1 more source

Analysis of entropy generation and Brownian motion for the pulsatile flow of Herschel–Bulkley fluid in a diseased curved artery

open access: yesAlexandria Engineering Journal, 2023
The influence of Thermophoresis and Brownian motion on the pulsing flow of nano-fluid (blood) through a curved artery with stenosis and post-stenotic dilatation in its interior is investigated numerically.
M. Hussain, M.S. Shabbir
doaj  

Exact solutions for the probability density of various conditioned processes with an entrance boundary [PDF]

open access: yesJ. Math. Phys. 65, 023303 (2024)
The probability density is a fundamental quantity for characterizing diffusion processes. However, it is seldom known except in a few renowned cases, including Brownian motion and the Ornstein-Uhlenbeck process and their bridges, geometric Brownian motion, Brownian excursion, or Bessel processes. In this paper, we utilize Girsanov's theorem, along with
arxiv  

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