Results 51 to 60 of about 330,519 (320)

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Comparison of Refractive Outcomes Between Small Lenticule Extraction Using a 500 KHz and a 2 MHz Femtosecond Laser

Diagnostics
Background/Objectives: The aim of this study was to compare the efficacy of correcting myopia and myopic astigmatism between small incision lenticule extraction (SMILE) surgery performed using VisuMax 500 and that using VisuMax 800. Methods: Patients who
Jung Wan Kim, Youngsub Eom, Dong Hyun Kim, Ji Won Jeong, Seh Kwang Park, Jong Suk Song   +5 more
doaj   +1 more source

Geometric Optimization and Mechanical Performance Enhancement of Auxetic Structures for High‐Impact Applications Through Fused Deposition Modeling

Advanced Engineering Materials, EarlyView.
This study explores the mechanical performance of three auxetic structures, identifying a re‐entrant‐star hybrid as the most effective for impact absorption. Finite element simulations and experiments demonstrate significant gains in energy absorption and flexural strength after geometric optimization. This study investigates the mechanical performance
Malik Hassan, Manjusri Misra, Alexander Bardelcik, Stefano Gregori, Amar K. Mohanty   +4 more
wiley   +1 more source

Impact of a Turbulent Ocean Surface on Laser Beam Propagation

Sensors, 2022
The roughness of the ocean surface significantly impacts air-to-sea imaging, oceanographic monitoring, and optical communication. Most current and previous methods for addressing this roughness and its impact on optical propagation are either entirely ...
Omar Alharbi, Tim Kane, Diane Henderson
doaj   +1 more source

Refraction of dispersive shock waves [PDF]

, 2012
We study a dispersive counterpart of the classical gas dynamics problem of the interaction of a shock wave with a counter-propagating simple rarefaction wave often referred to as the shock wave refraction.
A.M. Leszczyszyn, Ablowitz, Abramowitz, Amo, Arsenin, Assanto, Biondini, Chang, Christodoulides, Courant, El, El, El, El, El, El, El, Engels, Forest, G.A. El, Gatz, Ghofraniha, Grava, Grava, Gurevich, Gurevich, Gurevich, Gurevich, Hasimoto, Hoefer, Hoefer, Hoefer, Hoefer, Hoefer, Jin, Kamchatnov, Kamchatnov, Kamchatnov, Kivshar, Kodama, Kodama, Kudashev, Landau, Lax, Moses, Ovsyannikov, Pavlov, Pitaevskii, Rosciszewski, Rozhdestvenskii, Sasaki, Tian, Tian, Tricomi, Tsarev, V.V. Khodorovskii, Wan, Wan, Weideman, Whitham   +59 more
core   +5 more sources

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

Advanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim, Antônio Rogério de Souza, Tatiana Bendo, Aloisio Nelmo Klein, Rodrigo Perito Cardoso   +4 more
wiley   +1 more source

Topography-Guided Trans-Epithelial No-Touch Photorefractive Keratectomy for High Irregular Astigmatism After Penetrating Keratoplasty: A Prospective 12-Months Follow-Up

Therapeutics and Clinical Risk Management, 2021
Leopoldo Spadea, Giacomo Visioli, Davide Mastromarino, Shehani Alexander, Santino Pistella Eye Clinic, Policlinico Umberto 1, “Sapienza” University of Rome, Rome, ItalyCorrespondence: Leopoldo SpadeaHead Eye Clinic, Policlinico Umberto 1, “Sapienza ...
Spadea L, Visioli G, Mastromarino D, Alexander S, Pistella S   +4 more
doaj  

A Characteristics Set Computation Model for Internal Wavenumber Spectra and Its Validation with MODIS Retrieved Parameters in the Sulu Sea and Celebes Sea

Remote Sensing, 2022
The quasi-linear or nonlinear interactions among different ocean motions dominate the system internal structure and appearance feature presented in spatial and temporal evolution.
Yongzeng Yang, Meng Sun, Lina Sun, Changshui Xia, Yong Teng, Xinmei Cui   +5 more
doaj   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Refraction Correction for Spectrally Derived Bathymetry Using UAS Imagery

Remote Sensing, 2023
Spectrally derived bathymetry (SDB) algorithms are rapidly gaining in acceptance and widespread use for nearshore bathymetric mapping. In the past, refraction correction could generally be ignored in SDB, due to the relatively small fields of view (FOVs)
Selina E. Lambert, Christopher E. Parrish   +1 more
doaj   +1 more source