Results 41 to 50 of about 556,588 (202)

Surface magnetic canting in a nonuniform film

, 2004
The zero temperature equilibrium configuration of a nonuniform system made of a ferromagnetic (FM) monolayer on top of a semi-infinite FM film is calculated using a nonlinear mapping formulation of mean-field theory, where the surface is taken into ...
M. G. Pini, A. V. Anisimov, A. Rettori, D. P. Pappas, A. P. Popov   +4 more
core   +1 more source

Context‐Dependent Effects of Beavers (Castor spp.) on Freshwater Pearl Mussels (Margaritifera margaritifera) in European Rivers 河狸对欧洲河流中的淡水珍珠贝 (Margaritifera margaritifera) 存在情境依赖性影响

Wildlife Letters, EarlyView.
The study explores how beavers (Castor spp.) affect endangered freshwater pearl mussels (Margaritifera margaritifera) in European rivers. Beaver dams can harm small, fragmented mussel populations by reducing flow, increasing sediment, and potentially limiting host fish movement, while larger populations may benefit from improved bed stability and ...
Louise Lavictoire, Ian Convery, Ben Strachan   +2 more
wiley   +1 more source

Systematic investigation of the diffraction efficiency of sub‐15 nm resolution soft X‐ray zone plates via simulation and measurement

Journal of Synchrotron Radiation, EarlyView.
This study presents systematic measurements and rigorous coupled‐wave analysis of relative and absolute diffraction efficiencies for sub‐15 nm soft X‐ray Fresnel zone plates. By decoupling intrinsic optical performance from practical beamline transmission losses, this work establishes a highly reliable metrology framework to support the development of ...
Qingyuan Mao, Yuchen Jiao, Liang Liu, Jingyuan Zhu, Li Jiang, Xiangzhi Zhang, Zhanshan Wang   +6 more
wiley   +1 more source

A revisited Popov criterion for nonlinear Lur'e systems with sector-restrictions

, 1997
This paper revisits a well-known Popov criterion for absolute stability analysis of multiple sector-restricted nonlinear time-invariant (NTI) Lur'e systems. Extending the Brockett and Willems (1965) frequency-domain Popov criterion for a SISO system
Park, P, Poogyeon Park
core   +1 more source

Towards data‐driven predictive maintenance for vacuum ion pumps at European XFEL

Journal of Synchrotron Radiation, EarlyView.
This paper presents a machine‐learning‐based approach for early fault detection in vacuum ion pumps at the European XFEL by analyzing pressure data to detect fault precursors. The developed method enables predictive maintenance, reducing unplanned downtime and improving operational reliability.Large‐scale scientific facilities, such as the European ...
Amna Majid, Michaela Petrich, Martin Dommach, Steve Aplin, Walid Maalej, Luca Gelisio, Danilo Ferreira de Lima   +6 more
wiley   +1 more source

From analytical to data‐driven: multi‐method optimization of a bendable mirror system for dynamic focusing

Journal of Synchrotron Radiation, EarlyView.
A small‐radius‐of‐curvature bendable mirror system is developed for dynamic focusing in X‐ray free‐electron laser and synchrotron radiation beamlines, and a transfer‐learning neural‐network and differential‐evolution framework is used for force‐to‐shape modeling and inverse optimization.
Baoning Sun, Zhixiang Wen, Qinghao Zhu, Jun Luo, Tairong Xu, Lingfeng Zhu, Yaxiang Liang, Jitao Sun, Zhuo Li, Shun Xia, Zhongmin Xu, Meiyi Wu, Qinming Li, Weiqing Zhang, Xueming Yang   +14 more
wiley   +1 more source

Frequency and Severity of Allergic Reactions to Non‐Mandatory Labelled Allergenic Foods—Data From Two Large European Cohorts

Allergy, EarlyView.
In two large European cohorts, 589 reactions to non‐mandatory labelled plant‐based foods were identified with sunflower seed, pine nut, pea and lentil as the most frequent triggers. Reaction severity was not different between mandatory and non‐mandatory labelled allergenic foods. Their frequency and rising trends (e.g., fenugreek, pumpkin seed) support
Sabine Dölle‐Bierke, Alejandro Gonzalo‐Fernández, Dominique Sabouraud‐Leclerc, Laura Barreales‐Tolosa, Barbara Ballmer‐Weber, Simona Belohlavkova, Maria B. Bilò, Ruta Dubakiene, Karin Hartmann, Monika Jedrzejczak‐Czechowicz, Thuy‐My Le, Lars Lange, Nikolaos G. Papadopoulos, Guillaume Pouessel, Isabel Reig, Athanasios Sinaniotis, E. N. Clare Mills, Margitta Worm, Montserrat Fernández‐Rivas   +18 more
wiley   +1 more source

Robust stability of non linear time varying systems [PDF]

, 1999
summary:Systems with time-varying non-linearity confined to a given sector (Luré type) and a linear part with uncertainty formulated by an interval transfer function, are considered.
Zeheb, Ezra
core   +1 more source

On Control Synthesis of Hydraulic Servomechanisms in Flight Controls Applications

Actuators
This paper presents some of the most significant findings in the design of a hydraulic servomechanism for flight controls, which were primarily achieved by the first author during his activity in an aviation institute. These results are grouped into four
Ioan Ursu, Daniela Enciu, Adrian Toader
doaj   +1 more source

Comparative review of entanglement risk assessments for cetacean conservation and management

Conservation Biology, EarlyView.
Abstract Cetacean entanglement in fishing gear remains a major global threat that exposes persistent gaps in how fisheries management frameworks manage risk to nontarget species. Ecological risk assessment (ERA) offers a structured way to link exposure and consequences to an explicit statement of risk, but entanglement risk assessments vary widely in ...
Laura Joan Feyrer, Clair Evers, Hilary Moors‐Murphy   +2 more
wiley   +1 more source