Results 41 to 50 of about 5,935 (237)

Measurement of the direct damping derivative in roll of the two calibration missile models [PDF]

FME Transactions, 2013
Measurement of the direct damping derivative in roll in the T-38 wind tunnel is described in this paper. The T-38 wind tunnel data for the Basic Finner Model and Modified Basic Finner model are shown.
Samardžić Marija, Isaković Jovan, Miloš Marko, Anastasijević Zoran, Nauparac Dragan B.   +4 more
doaj  

Interval Oscillation Criteria for Second-Order Forced Functional Dynamic Equations on Time Scales

Discrete Dynamics in Nature and Society, 2014
This paper is concerned with oscillation of second-order forced functional dynamic equations of the form (r(t)(xΔ(t))γ)Δ+∑i=0n‍qi(t)|x(δi(t))|αisgn  x(δi(t))=e(t) on time scales. By using a generalized Riccati technique and integral averaging techniques,
Shao-Yan Zhang, Qi-Ru Wang
doaj   +1 more source

The volume-dependent Forced Oscillation Technique

IFAC-PapersOnLine, 2018
Abstract This paper describes a novel extension of the Forced Oscillation Technique (FOT), namely the volume-dependent Forced Oscillation Technique (v-FOT). This extension is based on the measurement of the respiratory impedance over the whole lung volume.
Chuong Ngo, Falk Dippel, Sylvia Lehmann, Klaus Tenbrock, Thomas Vollmer, Berno Misgeld, Steffen Leonhardt   +6 more
openaire   +1 more source

Evaluation of impulse oscillation system: comparison with forced oscillation technique and body plethysmography [PDF]

European Respiratory Journal, 2001
The impulse oscillation system (IOS) has been developed recently to measure respiratory system resistance (Rrs) and reactance (Xrs) at different frequencies up to ≥25 Hz. IOS has, however, not been validated against established techniques.This study compared IOS with the classical pseudorandom noise forced oscillation technique (FOT) and body ...
J, Hellinckx, M, Cauberghs, K, De Boeck, M, Demedts   +3 more
openaire   +2 more sources

Superlubricity and Corrosion Inhibition Properties of Solvate Ionic Liquids in Hybrid Carbon Fiber Reinforced Plastic–Steel Interfaces

Advanced Engineering Materials, EarlyView.
Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees, Timothy Harte, Bhagya Dharmasiri, Y. Athulya Wickramasingha, David J. Hayne, Daniel J. Eyckens, Luke C. Henderson   +6 more
wiley   +1 more source

A forced oscillation system for damping derivative measurement in the T-38 trisonic wind tunnel [PDF]

Scientific Technical Review, 2018
A forced oscillation system for the measurement of damping derivative due to an aircraft or missile model oscillatory motion in a wind tunnel test section is described.
Samardžić Marija, Marinkovski Dragan, Ćurčić Dušan   +2 more
doaj  

Generalized Variational Oscillation Principles for Second-Order Differential Equations with Mixed-Nonlinearities

Discrete Dynamics in Nature and Society, 2012
Using generalized variational principle and Riccati technique, new oscillation criteria are established for forced second-order differential equation with mixed nonlinearities, which improve and generalize some recent papers in the literature.
Jing Shao, Fanwei Meng, Xinqin Pang
doaj   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Forced oscillation of second order nonlinear dynamic equations on time scales

Electronic 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   +1 more source

Fully Additive Vertical Organic Electrochemical Transistors on Renewable and Compostable Substrates Enable Ultrasensitive Bioelectronics

Advanced Functional Materials, EarlyView.
Fully additive vertical organic electrochemical transistors (vOECTs) with channel‐length of 226 nm on a 50 µm compostable substrate achieve >106 current modulation and ∼36 mS transconductance. Ion‐selective integration enables 1.1 mA dec−1 sensitivity and 36 µm detection limit, highlighting a scalable platform for sustainable electronics and ...
Giulia Frusconi, Samuele Lavelli, Zsolt M. Kovács‐Vajna, Fabrizio Torricelli   +3 more
wiley   +1 more source