Results 31 to 40 of about 7,146 (271)

Work-loop techniques for optimising nonlinear forced oscillators

CoRR, 2022
Linear and nonlinear resonant states can be restrictive: they exist at particular discrete states in frequency and/or elasticity, under particular (e.g., simple-harmonic) waveforms. In forced oscillators, this restrictiveness is an obstacle to system design and control modulation: altering the system elasticity, or modulating the response, would both ...
Arion Pons, Tsevi Beatus
openaire   +2 more sources

Respiratory oscillometry and functional analyses in patients with idiopathic scoliosis

Brazilian Journal of Medical and Biological Research, 2023
Scoliosis is a condition that affects the spine and causes chest rotation and trunk distortion. Individuals with severe deformities may experience dyspnea on exertion and develop respiratory failure.
C.M.S. Sousa, A.L.C. Pessoa, L.E. Carelli, C.O. Ribeiro, A.J. Lopes, P.L. Melo   +5 more
doaj   +1 more source

Acute effects of inspiratory pressure threshold loading upon airway resistance in people with asthma [PDF]

, 2009
This is the post-print version of the final paper published in Respiratory Physiology & Neurobiology. The published article is available from the link below.
How, Stephen C, McConnell, Alison K, Romer, LM, McConnell, AK, Romer, Lee M   +4 more
core   +1 more source

Correlations between forced oscillation technique parameters and pulmonary densitovolumetry values in patients with acromegaly [PDF]

Brazilian Journal of Medical and Biological Research, 2015
The aims of this study were to evaluate the forced oscillation technique (FOT) and pulmonary densitovolumetry in acromegalic patients and to examine the correlations between these findings.
G.B. Camilo, A.R.S. Carvalho, D.C. Machado, R. Mogami, L. Kasuki, M.R. Gadelha, P.L. Melo, A.J. Lopes   +7 more
doaj   +3 more sources

Evaluation of the forced oscillation technique for the determination of resistance to breathing [PDF]

Journal of Clinical Investigation, 1968
Total respiratory resistance (R(T)) was measured by the application of a sine wave of airflow to the mouth at the resonant frequency of the respiratory system. The mean respiratory resistance of 42 normal subjects, measured at a mean functional residual capacity of 3.3 liters, was 2.3, SD +/- 0.5, cm H(2)O/liter per sec, and the resonant frequency was ...
A B, Fisher, A B, DuBois, R W, Hyde
openaire   +2 more sources

Interval Oscillation Criteria for Forced Second-Order Nonlinear Delay Dynamic Equations with Damping and Oscillatory Potential on Time Scales

International Journal of Differential Equations, 2016
We are concerned with the interval oscillation of general type of forced second-order nonlinear dynamic equation with oscillatory potential of the form rtg1xt,xΔtΔ+p(t)g2(x(t),xΔ(t))xΔ(t)+q(t)f(x(τ(t)))=e(t), on a time scale T.
Hassan A. Agwa, Ahmed M. M. Khodier, Heba A. Hassan   +2 more
doaj   +1 more source

Técnica de oscilações forçadas na análise da resposta broncodilatadora em voluntários sadios e indivíduos portadores de asma brônquica com resposta positiva Using the forced oscillation technique to evaluate bronchodilator response in healthy volunteers and in asthma patients presenting a verified positive response

Jornal Brasileiro de Pneumologia, 2006
OBJETIVO: Analisar, através da técnica de oscilações forçadas, pacientes asmáticos com resposta broncodilatadora positiva pelo laudo espirométrico e comparar esses resultados com os obtidos em indivíduos sadios.
Juliana Veiga Cavalcanti, Agnaldo José Lopes, José Manoel Jansen, Pedro Lopes de Melo   +3 more
doaj   +1 more source

Survey on forced oscillations in power system

Journal of Modern Power Systems and Clean Energy, 2017
The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system.
Mohammadreza GHORBANIPARVAR
doaj   +1 more source

Reference values of impulse oscillometric lung function indices in adults of advanced age. [PDF]

, 2013
Impulse oscillometry (IOS) is a non-demanding lung function test. Its diagnostic use may be particularly useful in patients of advanced age with physical or mental limitations unable to perform spirometry.
Wichmann, Heinz-Erich, Rudolf A. Jörres, Margit Heier, Rudolf A. Jörres (340115), Behr, Jürgen, Holle, R., H.-Erich Wichmann (72009), H.-Erich Wichmann, Karrasch, S., Huber, R.M., Wichmann, H.-E., Rolf Holle, Rudolf M. Huber (412835), Nowak, Dennis, Peters, Annette, Joachim Heinrich (60421), Stefan Karrasch, Rudolf A Jörres, Rolf Holle (262610), KORA Study Group, Annette Peters (62601), Schulz, H., Holle, Rolf, Heier, M., Karrasch, Stefan, Annette Peters, Jürgen Behr (272687), Nowak, D., Holger Schulz, Dennis Nowak, Schulz, Holger, Peters, A., Huber, Rudolf M., Joachim Heinrich, Claudia Flexeder, Heinrich, Joachim, Rudolf M. Huber, H-Erich Wichmann, Claudia Flexeder (412834), Dennis Nowak (412836), Jürgen Behr, Heinrich, J., Rudolf M Huber, Margit Heier (200535), Watz, Henrik, Flexeder, Claudia, Behr, J., Flexeder, C., Stefan Karrasch (412837), Holger Schulz (13022), Jörres, R.A., Heier, Margit, Jörres, Rudolf A., Wichmann, H.-Erich   +53 more
core   +1 more source

Diagnostic accuracy of respiratory impedance parameters to detect airflow obstruction in adults

Indian Journal of Allergy Asthma and Immunology, 2021
OBJECTIVE: The present study was aimed to evaluate the diagnostic accuracy of impedance parameters to detect airflow obstruction and the severity of airflow obstruction in adults. METHODS: The spirometry parameters (forced expiratory volume in 1 s [FEV1],
Sajal De
doaj   +1 more source