Results 11 to 20 of about 84,020 (286)

Forced oscillation of second order nonlinear dynamic equations on time scales [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2008
By means of the Kartsatos technique and generalized Riccati transformation techniques, we establish some new oscillation criteria for a second order nonlinear dynamic equations with forced term on time scales in terms of the coefficients.
M. Huang, W. Feng
doaj   +2 more sources

Comparison of impedance measured by the forced oscillation technique and pulmonary functions, including static lung compliance, in obstructive and interstitial lung disease [PDF]

open access: yesInternational Journal of COPD, 2019
Naoya Takeichi,1 Haruna Yamazaki,1 Keisaku Fujimoto21Department of Biomedical Laboratory Sciences, Graduate School of Medicine, Shinshu University, Matsumoto, Nagano, Japan; 2Department of Clinical Laboratory Sciences, Shinshu University School of Health
Takeichi N, Yamazaki H, Fujimoto K
doaj   +2 more sources

Regression equations of respiratory impedance of Indian adults measured by forced oscillation technique

open access: yesLung India, 2020
Background: Forced oscillation technique (FOT) is a technique to measure the mechanical properties of the lung. The present study was aimed to develop regression equations of within- and whole-breath respiratory impedance (Zrs) of healthy Indian adults ...
Sajal De   +3 more
doaj   +2 more sources

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

open access: yesBrazilian 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   +7 more
doaj   +4 more sources

Forced oscillation technique for early detection of the effects of smoking and COPD: contribution of fractional-order modeling [PDF]

open access: yesInternational Journal of COPD, 2018
Caroline Oliveira Ribeiro,1 Alvaro Camilo Dias Faria,1 Agnaldo José Lopes,2,3 Pedro Lopes de Melo1 1Biomedical Instrumentation Laboratory, Institute of Biology and Faculty of Engineering, State University of Rio de Janeiro, Rio de Janeiro, Brazil;
Ribeiro CO   +3 more
doaj   +2 more sources

Early Diagnosis of Respiratory Abnormalities in Asbestos-Exposed Workers by the Forced Oscillation Technique. [PDF]

open access: yesPLoS ONE, 2016
BACKGROUND:The current reference test for the detection of respiratory abnormalities in asbestos-exposed workers is spirometry. However, spirometry has several shortcomings that greatly affect the efficacy of current asbestos control programs. The forced
Paula Morisco de Sá   +3 more
doaj   +2 more sources

Accuracy of forced oscillation technique to assess lung function in geriatric COPD population [PDF]

open access: yesInternational Journal of COPD, 2016
Hoi Nam Tse,1 Cee Zhung Steven Tseng,1 King Ying Wong,2 Kwok Sang Yee,2 Lai Yun Ng1 1Medical and Geriatric Department, Respiratory Unit, Kwong Wah Hospital, 2Department of Tuberculosis and Chest Unit, Wong Tai Sin Hospital, Hong Kong, People’s ...
Tse HN, Tseng CZ, Wong KY, Yee KS, Ng LY
doaj   +2 more sources

Oscillation results for a fractional partial differential system with damping and forcing terms

open access: yesAIMS Mathematics, 2023
In this paper, we study the forced oscillation of solutions of a fractional partial differential system with damping terms by using the Riemann-Liouville derivative and integral.
A. Palanisamy   +4 more
doaj   +1 more source

Forced oscillation of impulsive fractional partial differential equations

open access: yesPartial Differential Equations in Applied Mathematics, 2023
In this paper, we investigate the forced oscillation of impulsive fractional partial differential equations. Some sufficient conditions are established which guarantee that the oscillation of the solutions by applying the integral transformation ...
G.E. Chatzarakis, K. Logaarasi
doaj   +1 more source

Wind Tunnel Measurement Systems for Unsteady Aerodynamic Forces on Bluff Bodies: Review and New Perspective

open access: yesSensors, 2020
Wind tunnel tests have become one of the most effective ways to evaluate aerodynamics and aeroelasticity in bluff bodies. This paper has firstly overviewed the development of conventional wind tunnel test techniques, including high frequency base balance
Zengshun Chen   +3 more
doaj   +1 more source

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