Results 31 to 40 of about 634,594 (289)

Nonlinear dynamics of a rotating shaft with a breathing crack [PDF]

, 2011
In this paper, the effects of a breathing crack on the vibratory characteris- tics of a rotating shaft are investigated. A new, simple and robust model composed of two rigid bars connected with a nonlinear flexural spring is proposed.
Saber El Arem, EL AREM, Saber, NGUYEN, Quoc Son, Quoc Son Nguyen   +3 more
core   +1 more source

Analytical soliton solutions of the perturbed fractional nonlinear Schrödinger equation with space–time beta derivative by some techniques

Results in Physics, 2023
Nonlinear fractional-order evolution equations are fundamental strategies for simulating nonlinear phenomena on a large scale in technology, science, and engineering.
M. Ali Akbar, Farah Aini Abdullah, Md. Morshedul Haque   +2 more
doaj   +1 more source

Practice recommendations for the role of physiotherapy in the management of sleep disorders: the 2022 Brazilian Sleep Association Guidelines [PDF]

Sleep Science, 2022
This clinical guideline supported by the Brazilian Sleep Association comprises a brief history of the development of Brazilian sleep physiotherapy, outlines the role of the physiotherapist as part of a sleep health team, and describes the clinical ...
Cristina Frange, Aline Marques Franco, Evelyn Brasil, Raquel Pastrello Hirata, Juliana Arcanjo Lino, Daiana Moreira Mortari, Daisy Satomi Ykeda, Mario André Leocádio-Miguel, Carolina Vicaria Rodrigues D’Aurea, Luciana Oliveira e Silva, Susana Cristina Lerosa Telles, Sofia Fontanello Furlan, Bruno Búrigo Peruchi, Camila Ferreira Leite, Fabiana Tokie Yagihara, Leticia Dominguez Campos, Melissa Araújo Ulhôa, Moara Gomes da Rocha Cruz, Ricardo Beidacki, Ronaldo Batista Santos, Sandra Souza de Queiroz, Simone Barreto, Vivien Schmeling Piccin, Fernando Morgadinho Santos Coelho, Luciana Studart, Marcia Assis, Luciano F. Drager   +26 more
doaj   +1 more source

Sleep-related breathing disorders in patients with heart failure: classification, epidemiology and pathophysiology. Part I

Российский кардиологический журнал, 2021
The problem of heart failure (HF) is one of the central problems in modern cardiology due to its high prevalence among the population and high mortality.
K. S. Krupichka, M. V. Agaltsov, R. P. Myasnikov, O. M. Drapkina   +3 more
doaj   +1 more source

Pulmonary Compliance in Patients with Periodic Breathing [PDF]

Circulation, 1958
A study of pulmonary compliance in patients with periodic breathing was made. The elastic properties of the lung were found to be normal in some patients and grossly decreased in others. Two types of periodic breathing mechanics were found: in one there are similar variations of tidal volumes and unchanged pulmonary compliance; in the other a constant ...
H A, LYONS, F, BURNO, R W, STONE
openaire   +2 more sources

Periodic Breathing and Apnea in Preterm Infants [PDF]

Pediatric Research, 1990
The relationship between periodic breathing and idiopathic apnea of prematurity was investigated. We recorded respiratory impedance, heart rate, pulse oximetry and end-tidal CO2 from 68 untreated infants of less than or equal to 34 wk gestation with a diagnosis of idiopathic apnea of prematurity.
K J, Barrington, N N, Finer
openaire   +2 more sources

Bed Rest and Hypoxic Exposure Affect Sleep Architecture and Breathing Stability

Frontiers in Physiology, 2017
Objective: Despite over 50 years of research on the physiological effects of sustained bed rest, data characterizing its effects on sleep macrostructure and breathing stability in humans are scarce.
Shawnda A. Morrison, Shawnda A. Morrison, Shawnda A. Morrison, Dani Mirnik, Spela Korsic, Ola Eiken, Igor B. Mekjavic, Igor B. Mekjavic, Leja Dolenc-Groselj   +8 more
doaj   +1 more source

Non-Contact Monitoring and Classification of Breathing Pattern for the Supervision of People Infected by COVID-19

Sensors, 2021
During the pandemic of coronavirus disease-2019 (COVID-19), medical practitioners need non-contact devices to reduce the risk of spreading the virus. People with COVID-19 usually experience fever and have difficulty breathing.
Ariana Tulus Purnomo, Ding-Bing Lin, Tjahjo Adiprabowo, Willy Fitra Hendria   +3 more
doaj   +1 more source

Periodic solutions of a hysteresis model for breathing

, 2020
We propose to model the lungs as a viscoelastic deformable porous medium with a hysteretic pressure–volume relationship described by the Preisach operator.
Krejci, Pavel, Jana Kopfová, Eleuteri, Michela, Ipocoana, Erica, Michela Eleuteri, Erica Ipocoana, Kopfova, Jana, Pavel Krejčí   +7 more
core   +1 more source

Non-Contact Breathing Monitoring Using Sleep Breathing Detection Algorithm (SBDA) Based on UWB Radar Sensors

Sensors, 2022
Ultra-wideband radar application for sleep breathing monitoring is hampered by the difficulty of obtaining breathing signals for non-stationary subjects.
Muhammad Husaini, Latifah Munirah Kamarudin, Ammar Zakaria, Intan Kartika Kamarudin, Muhammad Amin Ibrahim, Hiromitsu Nishizaki, Masahiro Toyoura, Xiaoyang Mao   +7 more
doaj   +1 more source