Results 101 to 110 of about 21,993 (294)

Nonlinear ultrasound scattering by a cloud of microbubbles

Physics Procedia, 2010
AbstractIn this study, we theoretically analyze the interaction of ultrasound waves in a liquid with suspended gas microbubbles confined in region of the liquid. In ultrasound harmonic imaging, gas microbubbles are used to contrast image by accentuating the generation of backscattered second-harmonic waves.
Silva, Glauber T., Belohlavek, Marek, McMahon, Eileen M., Fatemi, Mostafa   +3 more
openaire   +1 more source

Learning‐Based Soft Robotic Grasping: Recent Progress and Remaining Challenges

Advanced Robotics Research, EarlyView.
This review analyzes learning‐based soft robotic grasping from a pipeline‐oriented perspective, encompassing soft gripper design, multimodal sensing, and learning‐based planning and control. It surveys key neural network architectures and benchmark datasets and identifies critical challenges such as sim‐to‐real transfer, generalization, and continual ...
Arnab Majumder, Jelizaveta Konstantinova, Graham Deacon, Kaspar Althoefer   +3 more
wiley   +1 more source

Reclassifying transcranial pulse stimulation as TNUS: Nonlinear mechanics necessitate departure from the ITRUSST framework

Brain Stimulation
Background: Transcranial ultrasound has emerged as a promising non-invasive neuromodulation modality for Alzheimer's disease (AD). However, its clinical translation is hindered by inconsistent biophysical classification between quasi-linear low-intensity
Qinxi Luo, Neng Huang, Dan Li, Xinxin Chen, Zhu Liu, Leihao Sha, Changliang Liu, Yonghong Yang, Shizheng Wu, Lars Wojtecki, Lei Chen, Cheng Huang   +11 more
doaj   +1 more source

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source

Nonlinear ultrasound wave propagation in thermoviscous fluids

, 2004
Traditional ultrasound theory is based on linear theory, however, for strongly focused sound beams, the pressure levels are sufficiently high to generate nonlinear waves.
Sørensen, Mads Peter
core  

Mathematical Models for Nonlinear Ultrasound Contrast Imaging with Microbubbles

SIAM Journal on Applied Mathematics
Ultrasound contrast imaging is a specialized imaging technique that applies microbubble contrast agents to traditional medical sonography, providing real-time visualization of blood flow and vessels. Gas-filled microbubbles are injected into the body, where they undergo compression and rarefaction and interact nonlinearly with the ultrasound waves ...
Vanja Nikolic, Teresa Rauscher
openaire   +5 more sources

Effect of Alkyl Chain Length on the Bandgap, Ferroelectric, and Photoelectric Properties of Lead‐Based Molecular Ferroelectrics

Advanced Science, EarlyView.
This study develops a novel 2D molecular ferroelectric [C6N2H18]PbI4 with polarization enhanced photovoltaics. It systematically investigates the effect of alkylamine spacer cation chain lengths on the band gap, ferroelectric, and photoelectric properties, offering new design strategies.
Ganghua Zhang, Jinrong Wen, Ping Chen, Zhibo Chen, Pingying Tang, Dezeng Li, Jingshan Hou, Yongzheng Fang   +7 more
wiley   +1 more source

Enhancing CAR‐T Cell Efficacy in Solid Tumors by Inhibiting CCL5/VEGF‐Mediated Angiogenesis

Advanced Science, EarlyView.
This study reveals that CAR‐T cells in solid tumors produce CCL5, which paradoxically induces VEGF and angiogenesis to promote tumor growth. Blocking CCL5/VEGF signaling—through gene knockout, or the CCR5 inhibitor maraviroc—significantly enhances the antitumor efficacy of CAR‑T therapy (the diagram was created in Biorender).
Shishuo Sun, Qihong Li, Bixi Wang, Gang Wang, Ying Xue, Yibing Liang, Chenhe Hu, Zhenyu Wang, Xiaoge Gao, Haiheng Xu, Jun Song, Hailong Li, Liantao Li, Xiaoxiao Liu, Patrick Ming‐Kuen Tang, Qing Zhang   +15 more
wiley   +1 more source

Comparison of theories for acoustic wave propagation in gassy marine sediments

, 2014
More than three decades ago, Anderson and Hampton [1, 2] (A&H) presented theories for wave propagation in gassy water, saturated sediments and gassy sediments in their two part review, which has been cited by many researchers in the geoacoustics and ...
Dogan, Hakan, Leighton, T.G., White, P.R.   +2 more
core  

Simulação de não linearidades no campo acústico gerado por corpos com grandes amplitudes de deslocamento [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológio, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2012.Compressores lineares possuem em seu principio de funcionamento molas helicoidais as quais vibram ...
Hattori, Marcos Akira
core