Results 91 to 100 of about 37,570 (330)

Liquid Crystal‐Driven Chemical Feeding Accelerates Condensation Reactions in Droplet Microreactors

Advanced Science, EarlyView.
This work introduces a liquid crystal (LC)‐based platform for dynamic chemical feeding in droplet microreactors, enabling unprecedented control over reaction kinetics and mass transfer. By leveraging LC phase transition‐mediated release, new pathways are unlocked for enhancing confined reaction environments, advancing the fundamental capabilities of ...
Yang Xu, Alan H. Weible, Meng Zhang, Weichen Deng, Jen‐Chun Fang, Xiaoguang Wang   +5 more
wiley   +1 more source

Non‐Monotonic Ion Conductivity in Lithium‐Aluminum‐Chloride Glass Solid‐State Electrolytes Explained by Cascading Hopping

Advanced Science, EarlyView.
Cascading hopping events of lithium ions are identified as the main ion conduction mechanism in inorganic glass solid‐state electrolytes. Machine learning molecular dynamics simulations and hop function analysis confirm that pairs of lithium ions carry out cascading hopping motions.
Beomgyu Kang, Jina Yu, Shinji Saito, Jihyun Jang, Bong June Sung   +4 more
wiley   +1 more source

Least-Squares Estimators of Drift Parameter for Discretely Observed Fractional Ornstein–Uhlenbeck Processes

Mathematics, 2020
We introduce three new estimators of the drift parameter of a fractional Ornstein–Uhlenbeck process. These estimators are based on modifications of the least-squares procedure utilizing the explicit formula for the process and covariance structure of a ...
Pavel Kříž, Leszek Szała
doaj   +1 more source

Risk preference based option pricing in a fractional Brownian market [PDF]

We focus on a preference based approach when pricing options in a market driven by fractional Brownian motion. Within this framework we derive formulae for fractional European options using the traditional idea of conditional expectation.
Rostek, Stefan, Schöbel, Rainer
core  

Tanaka formula for the fractional Brownian motion

Stochastic Processes and their Applications, 2001
Let \(B=\{B(t),\;t\geq 0\}\) be the fractional Brownian motion with the Hurst parameter \(H\in (0,1)\). The local time \(L^a_t\) is defined as the density of the occupation measure \(\Gamma \to 2H\int _0^t1_{\Gamma }(B_s)s^{2H-1}\,ds\). The local time is shown to exist in \(L^2(\Omega )\) and its Wiener chaos expansions are computed. For \(H>1/3\), the
Laure Coutin, David Nualart, Ciprian A. Tudor   +2 more
openaire   +3 more sources

Robotic Materials With Bioinspired Microstructures for High Sensitivity and Fast Actuation

Advanced Science, EarlyView.
In the review paper, design rationale and approaches for bioinspired sensors and actuators in robotics applications are presented. These bioinspired microstructure strategies implemented in both can improve the performance in several ways. Also, recent ideas and innovations that embed robotic materials with logic and computation with it are part of the
Sakshi Sakshi, Rohit Pratyush Behera, Hongyu Zhou, Yifan Wang, Hortense Le Ferrand   +4 more
wiley   +1 more source

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 ...
Anna Talarczyk, Luis G. Gorostiza, Tomasz Bojdecki   +2 more
core  

Alternative micropulses and fractional Brownian motion

Stochastic Processes and their Applications, 1996
The generation of fractional Brownian motion (FBM) as a fractal sum of micropulses is considered [cf. \textit{B. B. Mandelbrot} and \textit{J. W. Van Ness}, SIAM Rev. 10, 422-437 (1968; Zbl 0179.47801)]). In an earlier paper of the authors [Stochastic Process Appl.
Benoit B. Mandelbrot, Renata Cioczek-Georges   +1 more
openaire   +3 more sources

Integrin‐Piezo1 Axis Drives ECM Remodeling and Invasion of 3D Breast Epithelium

Advanced Science, EarlyView.
Mechanical stiffening of the extracellular matrix around mature mammary acini induces sequential remodeling phases. An early response disrupts the basement membrane and promotes fibronectin secretion, followed by delayed invasion with matrix reorganization and proliferation.
Kabilan Sakthivel, Anna Kotowska, Zhimeng Fan, Ellen Juel Portner, Catherine Merry, Pontus Nordenfelt, Adam Cohen Simonsen, Amanda J. Wright, Vinay S Swaminathan   +8 more
wiley   +1 more source

Fractional Brownian Motion as a Differentiable Generalized Gaussian Process [PDF]

Brownian motion can be characterized as a generalized random process and, as such, has a generalized derivative whose covariance functional is the delta function. In a similar fashion, fractional Brownian motion can be interpreted as a generalized random
Peter C.B. Phillips, Victoria Zinde-Walsh   +1 more
core