Results 31 to 40 of about 5,935 (237)

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

Set of Oscillation Criteria for Second Order Nonlinear Forced Differential Equations with Damping

Discrete Dynamics in Nature and Society, 2014
By employing a generalized Riccati technique and an integral averaging technique, some new oscillation criteria are established for the second order nonlinear forced differential equation with damping.
Ambarka Abdalla Salhin, Ummul Khair Salma Din, Rokiah Rozita Ahmad, Mohd Salmi Md Noorani   +3 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

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

Influence of the ageing process on the resistive and reactive properties of the respiratory system

Clinics, 2009
INTRODUCTION: In an increasingly old society, the study of the respiratory system changes and new techniques dedicated to older patients are of interest in physiologic studies as well as in the diagnosis of respiratory diseases.
Caio Vinicius Villalón e Tramont, Alvaro Camilo Dias Faria, Agnaldo José Lopes, José Manoel Jansen, Pedro Lopes de Melo   +4 more
doaj   +1 more source

Evaluation of alveolar recruitment maneuver on respiratory resistance during general anesthesia: a prospective observational study

BMC Anesthesiology, 2020
Background Alveolar recruitment maneuvers enable easily reopening nonaerated lung regions via a transient elevation in transpulmonary pressure. To evaluate the effect of these maneuvers on respiratory resistance, we used an oscillatory technique during ...
Junko Nakahira, Shoko Nakano, Toshiaki Minami   +2 more
doaj   +1 more source

Forced oscilation technique and hyperinflation in COPD

Revista Portuguesa de Pneumologia, 2008
AbstractForced oscillation technique (FOT) is a simple method used to measure the mechanical impedance of the respiratory system.It can be a valuable test in poorly cooperative patients (pts) and in severe COPD.Little information exists concerning its value on hyperinflation in COPD pts.The aim of this study was to analyze the correlation (corr ...
A. Borba, G. Naveso, C. Oliveira, E. Magro, C. Rocha, A. Mineiro, J. Cardoso   +6 more
openaire   +2 more sources

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

Advanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch, Maximilian Holland, Klaus Drechsler, Johannes Schilp   +3 more
wiley   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source