Standing waves play a significant role in the appearance of cavitation phenomena. The goal of this study was to investigate the effect that the relation between standing and propagating waves in a focused field has on acoustic bubble cloud formation. Measurements of the cavitation signals were performed on five different configurations of a hemispheric phased array transducer (230 kHz) representing a wide range of relations between propagating and standing waves. The results show that configurations with a larger propagating component induce bubble clouds at lower pressures than configurations with a larger standing component.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ultrasmedbio.2011.08.002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A multidisciplinary pain management program for patients with chronic low back pain: a randomized, single-blind, controlled, feasibility study.
BMC Musculoskelet Disord
January 2025
Pain Medicine Section, Anesthesiology Dept, Hospital Clinic de Barcelona, Barcelona, Spain.
Background: Multidisciplinary programs are the first recommendation for non-specific chronic low-back pain, but implementing this type of program is complicated to get up and running. The primary aim of this study was to assess the feasibility and appropriateness of the PAINDOC multidisciplinary program for subjects with chronic low-back pain. The secondary objectives were to evaluate the decrease in pain intensity, pain-related disability and pain catastrophizing, as well as the improvement in quality of life with this program.
View Article and Find Full Text PDFThe eastern equatorial Atlantic hosts a productive marine ecosystem that depends on upward supply of nitrate, the primary limiting nutrient in this region. The annual productivity peak, indicated by elevated surface chlorophyll levels, occurs in the Northern Hemisphere summer, roughly coinciding with strengthened easterly winds. For enhanced productivity in the equatorial Atlantic, nitrate-rich water must rise into the turbulent layer above the Equatorial Undercurrent.
View Article and Find Full Text PDFDynamically reconfigurable acoustofluidic metasurface for subwavelength particle manipulation and assembly.
Nat Commun
January 2025
Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center at Stanford, Department of Radiology, School of Medicine, Stanford University, California, CA, USA.
Particle manipulation plays a pivotal role in scientific and technological domains such as materials science, physics, and the life sciences. Here, we present a dynamically reconfigurable acoustofluidic metasurface that enables precise trapping and positioning of microscale particles in fluidic environments. By harnessing acoustic-structure interaction in a passive membrane resonator array, we generate localized standing acoustic waves that can be reconfigured in real-time.
View Article and Find Full Text PDFEngineering the acoustic field with a Mie scatterer for microparticle patterning.
Lab Chip
January 2025
Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China.
The utilization of acoustic fields offers a contactless approach for microparticle manipulation in a miniaturized system, and plays a significant role in medicine, biology, chemistry, and engineering. Due to the acoustic radiation force arising from the scattering of the acoustic waves, small particles in the Rayleigh scattering range can be trapped, whilst their impact on the acoustic field is negligible. Manipulating larger particles in the Mie scattering regime is challenging due to the diverse scattering modes, which impacts the local acoustic field.
View Article and Find Full Text PDFSpatio-temporal dynamics and risk cluster analysis of highly pathogenic avian influenza (H5N1) in poultry: Advancing outbreak management through customized regional strategies in Egypt.
Open Vet J
November 2024
Department of Animal Hygiene and Zoonoses, Faculty of Veterinary Medicine, Matrouh University, Matrouh, Egypt.
Article Synopsis
- Highly pathogenic avian influenza (HPAI) H5N1 has persisted in Egypt for nearly 20 years, significantly affecting poultry and public health, with Egypt being a key location for outbreaks in Africa.
- This study aimed to analyze spatiotemporal patterns of HPAI H5N1 to identify high-risk areas at the subdistrict level and develop targeted interventions.
- Results revealed that while Menofia wasn't the outbreak origin, rural areas showed increased risk, with urban areas experiencing lower outbreak densities, suggesting that urban centers could initially spread the virus, necessitating focused public health responses.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!