Results 51 to 60 of about 3,460,573 (292)

A framework for automatic heart sound analysis without segmentation

BioMedical Engineering OnLine, 2011
Background A new framework for heart sound analysis is proposed. One of the most difficult processes in heart sound analysis is segmentation, due to interference form murmurs.
Tungpimolrut Kanokvate, Kongprawechnon Waree, Nishihara Akinori, Yuenyong Sumeth   +3 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

The Assessment of Stent Effectiveness Using a Wearable Beamforming MEMS Microphone Array System

IEEE Journal of Translational Engineering in Health and Medicine, 2016
Studies involving turbulent flow have been carried out in many parts of the cardiovascular system, and it has been widely reported that turbulence related to stenosis (narrowing) of arteries creates audible sounds, which may be analyzed to yield ...
Metin Akay, Andrei Dragomir, Yasemin M. Akay, Feihua Chen, Allison Post, Hani Jneid, David Paniagua, Ali Denktas, Biykem Bozkurt   +8 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

A Non‐Reciprocal Architected Porous Medium

Advanced Functional Materials, EarlyView.
ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies, Pablo Zavattieri, Nicolás Silin   +2 more
wiley   +1 more source

An algorithm of feature extraction for heart sounds based on lifting Wavelet transforms

工程科学与技术, 2013
:In order to extract the pathological information of heart sounds accurately, an improved method of feature extraction based on lifting wavelet transform analysis was proposed to analyze the first and second heart sounds and recognition different heart ...
Wang Mei-Jie, Li Zhi
doaj  

REDUPLICATION OF HEART SOUNDS. [PDF]

JAMA: The Journal of the American Medical Association, 1906
Reduplication means doubling; that is, the sounds still strike the ear, not as a single tone, but as a double tone. Both the first and the second sounds may be reduplicated. The appearance of extra beats is a totally distinct phenomenon. This subject has received scanty attention. Potain, in a study of 500 hearts, makes the first mention in literature.
openaire   +1 more source

Contrastive learning of heart and lung sounds for label-efficient diagnosis

Patterns, 2021
Summary Data labeling is often the limiting step in machine learning because it requires time from trained experts. To address the limitation on labeled data, contrastive learning, among other unsupervised learning methods, leverages unlabeled data to ...
Pratham N. Soni, Siyu Shi, Pranav Sriram, A. Ng, P. Rajpurkar   +4 more
semanticscholar   +1 more source

A Systematic Study of GelMA‐Carbopol Bioinks for High‐Fidelity Extrusion 3D Bioprinting at Physiological Temperatures

Advanced Healthcare Materials, EarlyView.
Gonzalez Martinez and collaborators develop a strategy to formulate high performance GelMA‐based bioinks with low solids contents. The resulting bioinks enable 3D bioprinting at 37 °C of high‐fidelity structures with tunable mechanical properties that support high cell viability and function.
David A. González‐Martínez, Aidee V. Arizpe Tafoya, Eduardo González‐Martínez, Mabel Barreiro Carpio, Laura Daniela Serrano Andrade, Christopher T. N. Chow, Mohammadhossein Dabaghi, Jeremy A. Hirota, Jose M. Moran‐Mirabal   +8 more
wiley   +1 more source

Preliminary Study on Real-Time Phonocardiogram Signal Acquisition and Analysis Using Machine Learning and IoMT for Digital Stethoscope

IEEE Access
Cardiovascular diseases currently pose the greatest threat to human health and future predicament is uncertain. Since most heart-related problems are reflected by the small variations in the heart’s sounds, quality research into heart rhythm will ...
M. Kalimuthu, C. Hemanth
doaj   +1 more source