Results 71 to 80 of about 4,481,103 (333)

Fast detection of venous air embolism in Doppler heart sound using the wavelet transform [PDF]

, 1997
The introduction of air bubbles into the systemic circulation can result in significant morbidity. Real-time monitoring of continuous heart sound in patients detected by precordial Doppler ultrasound is, thus, vital for early detection of venous air ...
Chan, BCB, Chan, FHY, Lam, FK, Lui, PW, Poon, PWF   +4 more
core   +1 more source

Flexible Multiscale Pore Hybrid Self-Powered Sensor for Heart Sound Detection

Italian National Conference on Sensors, 2021
This research introduces an idea of producing both nanoscale and microscale pores in piezoelectric material, and combining the properties of the molecular β-phase dipoles in ferroelectric material and the space charge dipoles in order to increase the ...
Boyan Liu, Liuyang Han, Lyuming Pan, Hongzheng Li, Jingjing Zhao, Ying Dong, Xiaohao Wang   +6 more
semanticscholar   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Reintroducing Heart Sounds for Early Detection of Acute Myocardial Ischemia in a Porcine Model – Correlation of Acoustic Cardiography With Gold Standard of Pressure-Volume Analysis

Frontiers in Physiology, 2019
BackgroundAcoustic cardiography is a hybrid technique that couples heart sounds recording with ECG providing insights into electrical-mechanical activity of the heart in an unsupervised, non-invasive and inexpensive manner.
Marco Luciani, Matteo Saccocci, Shingo Kuwata, Nikola Cesarovic, Miriam Lipiski, Patricia Arand, Peter Bauer, Andrea Guidotti, Evelyn Regar, Paul Erne, Michel Zuber, Francesco Maisano   +11 more
doaj   +1 more source

Optimal Heart Sound Segmentation Algorithm Based on K-Mean Clustering and Wavelet Transform

Applied Sciences, 2023
The accurate localization of S1 and S2 is essential for heart sound segmentation and classification. However, current direct heart sound segmentation algorithms have poor noise immunity and low accuracy. Therefore, this paper proposes a new optimal heart
Xingchen Xu, Xingguang Geng, Zhixing Gao, Hao Yang, Zhiwei Dai, Haiying Zhang   +5 more
doaj   +1 more source

Post-exercise contractility, diastolic function, and pressure: Operator-independent sensor-based intelligent monitoring for heart failure telemedicine [PDF]

, 2009
Background New sensors for intelligent remote monitoring of the heart should be developed. Recently, a cutaneous force-frequency relation recording system has been validated based on heart sound amplitude and timing variations at increasing heart rates ...
Tonino Bombardini, Vincenzo Gemignani, Elisabetta Bianchini, Emilio Pasanisi, Lorenza Pratali, Mascia Pianelli, Francesco Faita, Massimo Giannoni, Giorgio Arpesella, Rosa Sicari, Eugenio Picano   +10 more
core   +3 more sources

Selection Strategies for Flexible Pressure Sensor Electrode Materials Toward Ultrafast Response

Advanced Functional Materials, EarlyView.
This study reveals, for the first time, how the electrode–organic interface governs the temporal performance of flexible pressure sensors. By pairing high‐conductivity CVD PEDOT with commonly used metal electrodes, the authors demonstrate that interfacial energy alignment dictates microsecond‐scale response, providing a straightforward design strategy ...
Jinwook Baek, Yuxuan Zhang, Hyeondong Yang, Minyoung Kim, Pavlos P. Vlachos, Jeongok Choe, Bo‐Gyu Bok, Kejie Zhao, Han‐Wook Song, Min‐Seok Kim, Martin Byung‐Guk Jun, Sunghwan Lee   +11 more
wiley   +1 more source

Multivariable Fuzzy Measure Entropy Analysis for Heart Rate Variability and Heart Sound Amplitude Variability

Entropy, 2016
Simultaneously analyzing multivariate time series provides an insight into underlying interaction mechanisms of cardiovascular system and has recently become an increasing focus of interest.
Lina Zhao, Shoushui Wei, Hong Tang, Chengyu Liu   +3 more
doaj   +1 more source

Deep Neural Networks for the Recognition and Classification of Heart Murmurs Using Neuromorphic Auditory Sensors [PDF]

, 2017
Auscultation is one of the most used techniques for detecting cardiovascular diseases, which is one of the main causes of death in the world. Heart murmurs are the most common abnormal finding when a patient visits the physician for auscultation ...
Domínguez Morales, Juan Pedro, Domínguez Morales, Manuel Jesús, Jiménez Fernández, Ángel Francisco, Jiménez Moreno, Gabriel   +3 more
core  

Thermally Activated Delayed Fluorescence in Phase‐Separated Nanostructures

Advanced Functional Materials, EarlyView.
A supramolecular, phase‐separation driven strategy yields charge transfer (CT) complexes from alternating electron‐deficient pyromellitic diimide and electron‐rich 4,5‐dibromoveratrole. The resulting CT complexes self‐assemble into lamellar nanosheets with nanometer‐sized domains that exhibit thermally activated delayed fluorescence (TADF) at room ...
Bart W.L. van den Bersselaar, Giovanni M. Beneventi, Philip M. Greißel, Lukas A. Mai, Stefan J. D. Maessen, Bas F.M. de Waal, E.W. Meijer, Dirk M. Guldi, Ghislaine Vantomme   +8 more
wiley   +1 more source