Results 151 to 160 of about 5,264,500 (305)

Deterministic scale-invariant dynamics in a logistic Game-of-Life model

Communications Physics
Scale invariance is a hallmark of criticality in complex dynamical systems. While random external inputs or tunable stochastic interactions are typically required to produce critical behavior, it remains unclear whether scale-invariant dynamics can ...
Hakan Akgün, Xianquan Yan, Tamer Taşkıran, Muhamet Ibrahimi, Ching Hua Lee, Seymur Jahangirov   +5 more
doaj   +1 more source

Redistributive land reforms, agricultural productivity, and structural change: New cross‐national evidence

American Journal of Agricultural Economics, EarlyView.
Abstract Large‐scale land reforms constitute a substantial redistribution of wealth and reallocation of agricultural land, which is a major form of asset and production input in developing countries. While land redistribution (from the rich to the poor) remains a highly controversial issue, extensive evidence on its effect is limited.
Devashish Mitra, Abdulaziz B. Shifa, Lan Anh Tong, Mehmet A. Ulubasoglu   +3 more
wiley   +1 more source

R-AFPN: a residual asymptotic feature pyramid network for UAV aerial photography of small targets

Scientific Reports
This study proposes an improved Residual Asymptotic Feature Pyramid Network (R-AFPN) to address challenges in small target detection from the Unmanned Aerial Vehicle (UAV) perspectives, such as scale imbalance, feature extraction difficulty, occlusion ...
Zuowen Chen, Yahong Ma, Zi’an Gong, Minghao Cao, Yuyao Yang, Zhiyuan Wang, Tengjie Wang, Jing Li, Yuxi Liu   +8 more
doaj   +1 more source

The role of venture‐financed startups in innovation for US agriculture

American Journal of Agricultural Economics, EarlyView.
Abstract To evaluate the role played by startup companies in the innovation ecosystem of US agriculture, we compile a unique dataset of 6024 new entrants founded 1987–2019 that details their financing lifecycles, annual economic performance, and patenting activities.
Gregory D. Graff, Charles A. W. de Grazia, Nicholas E. Rada   +2 more
wiley   +1 more source

"Fourier Transform Method with an Asymptotic Expansion Approach: an Application to Currency Options" [PDF]

This paper develops a Fourier transform method with an asymptotic expansion approach for option pricing. The method is applied to European currency options with a libor market model of interest rates and jump-diffusion stochastic volatility models of ...
Kohta Takehara, Akihiko Takahashi
core  

Association Between Genetic Ancestry and Multiple Sclerosis Severity

Annals of Neurology, EarlyView.
Objective The objective of this study was to determine whether genetic ancestry is associated with differences in the clinical course of multiple sclerosis (MS). Methods Participants with MS living in the United Kingdom >18 years old were recruited from 2021 to 2025 and genotyped from saliva using a commercial array. Genetic ancestry was inferred using
Benjamin M. Jacobs, Emily Tregaskis‐Daniels, Luisa Schalk, Jakub Nagrodski, ADAMS investigators, Michelle Peter, Rashmi Kaimal, Roxanne Murray, Sadid Hoque, Terri‐Louise Brown, Ghaniah Hassan‐Smith, Helen L. Ford, Bruno Gran, Karim L. Kreft, Cord Spilker, Outi Quinn, David Rog, Miriam Mattoscio, Elisa Visentin, Ramya Shamji, Grace Fawehinmi, Katila George, Maria Papachatzaki, Katharine Harding, Rod Middleton, Tarunya Arun, Waqar Rashid, Adil Harroud, Huw R. Morris, Eli Silber, Gavin Giovannoni, Alastair J. Noyce, Ruth Dobson   +32 more
wiley   +1 more source

On the DGKT brane dual and its decoupling

Journal of High Energy Physics
It is not understood whether scale-separated AdS vacua in string theory admit a holographic dual. A well-known class of such vacua is provided by the DGKT solutions of massive type IIA string theory, where scale separation arises from large fluxes.
Fien Apers
doaj   +1 more source

Hybrid Inertial–Centrifugal Gas–Liquid Separator: CFD‐Driven Optimization Using Coupled Discrete Phase and Wall‐Film Modeling With Response Surface Methodology

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Efficient removal of liquid aerosols from compressed gas streams is essential in chemical and energy processes. Conventional separators relying on a single mechanism (inertial or centrifugal) struggle to capture both fine and coarse droplets simultaneously.
Son Ung Kang, Phyong Jon Thak, Kyong Jun Ri, Chung Hyok Choe   +3 more
wiley   +1 more source

"On the Asymptotic Optimality of the LIML Estimator with Possibly Many Instruments" [PDF]

We consider the estimation of the coefficients of a linear structural equation in a simultaneous equation system when there are many instrumental variables.
Naoto Kunitomo, T. W. Anderson, Yukitoshi Matsushita   +2 more
core  

Residual Strength Prediction of Chemically Reactive Two‐Phase Nanofluid Flow in a Bingham–Papanastasiou Rheological Theory Using a Morlet‐Based Wavelet Neural Network Approach

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The behavior of nanofluid flow involving a zero‐mass flux condition has received considerable interest because of a realistic scenario. In reality, this condition confines the optimistic accumulation or disappearance of nanoparticles past a sheet, constructing a more physically realistic demonstration through several applications, such as heat
Umair Khan, Hamza Rauf, Aurang Zaib, J. K. Madhukesh   +3 more
wiley   +1 more source