Results 11 to 20 of about 1,314 (144)
Superstability of micrometre jets surrounded by a polymeric shell. [PDF]
J Appl CrystallogrSuperstable micrometre compound jets have been produced for serial femtosecond X‐ray crystallography.We have produced superstable compound liquid microjets with a 3D‐printed coaxial flow‐focusing injector. The aqueous jet core is surrounded by a shell, a few hundred nanometres in thickness, of a low‐concentration aqueous solution of a low‐molecular ...
Rubio A +6 more
europepmc +2 more sources
Conceptual Design of an Unmanned Fixed-Wing Aerial Vehicle Based on Alternative Energy
International Journal of Aerospace Engineering, 2019 This paper focuses on the aerodynamics and design of an unmanned aerial vehicle (UAV) based on solar cells as a main power source. The procedure includes three phases: the conceptual design, preliminary design, and a computational fluid dynamics analysis
Alan G. Escobar-Ruiz +5 more
doaj +1 more source
Wind Energy, 2021 In this paper, we present a mathematical model and control strategy to regulate the yaw of a horizontal axis wind turbine. In order to obtain the dynamic equations of the yaw motion, the mathematical model is developed using the Euler–Lagrange ...
Eduardo Campos‐Mercado +4 more
doaj +1 more source
Modelling in Science Education and Learning, 2023 En los estudios superiores está plenamente integrado el desarrollo y evaluación de competencias transversales. En esta ponencia se muestra la experiencia en el Departamento de Ingeniería Mecánica y de Materiales (DIMM) de la Universitat Politècnica de ...
Josep L. Suñer Martínez +1 more
doaj +1 more source
Frontiers in Robotics and AIDetecting surface discontinuities in welds is essential to ensure the structural integrity of welded elements. This study addresses the limitations of manual visual inspection in shielded metal arc welding by applying convolutional neural networks for ...
Elisa Elizabeth Mendieta +3 more
doaj +1 more source
Reversible Data Hiding with a New Local Contrast Enhancement Approach
Mathematics, 2022 Reversible data hiding schemes hide information into a digital image and simultaneously increase its contrast. The improvements of the different approaches aim to increase the capacity, contrast, and quality of the image.
Eduardo Fragoso-Navarro +3 more
doaj +1 more source
Deep Reinforcement Learning‐Based Control for Real‐Time Hybrid Simulation of Civil Structures
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Real‐time Hybrid Simulation (RTHS) is a cyber‐physical technique that studies the dynamic behavior of a system by combining physical and numerical components that are coupled through a boundary condition enforcer. In structural engineering, the numerical components are subjected to environmental loads that become dynamic displacements of the ...
Andrés Felipe Niño +6 more
wiley +1 more source
A Modular AC-DC Power Converter with Zero Voltage Transition for Electric Vehicles
Energies, 2017 A study of the fundamental of operation of a three-phase AC-DC power converter that uses Zero-Voltage Transition (ZVT) together with Space Vector Pulse Width Modulation (SVPWM) is presented. The converter is basically an active rectifier divided into two
Jazmin Ramirez-Hernandez +2 more
doaj +1 more source
Resilient Biophysical Phenotype of Memory CD4+ T Cells in Long‐Lived Mice
Immunology, EarlyView.Aging is associated with increased stiffness and reduced migratory capacity of memory CD4+ T cells; however, these biophysical declines do not persist in exceptionally long‐lived mice. Instead, long‐lived individuals preserve T cell mechanics, migration and intracellular architecture, supporting mechanical resilience as a hallmark of successful immune ...
Aldo Abarca‐Ortega +6 more
wiley +1 more source
Journal of Applied Polymer Science, Volume 142, Issue 46, December 10, 2025.Schematic overview of the valorization of yerba mate and black tea waste into lignocellulosic nanoparticles (nYM, nBT), incorporated into PLA/PHB films plasticized with maleinized corn oil (MCO). The resulting bionanocomposites exhibited enhanced barrier and mechanical performance, making them suitable for biodegradable food packaging applications ...
Jaume Sempere‐Torregrosa +5 more
wiley +1 more source