Results 91 to 100 of about 136,212 (303)

Forced oscillation of planetary mechanism synchronizer for spindle drive [PDF]

open access: yesE3S Web of Conferences
The article is devoted to the results of a theoretical and experimental study of forced oscillation of the epi-hypocyclic planetary mechanism synchronizer used to drive the spindles of the cotton machine apparatus.
Alimov Bakhtiyar, Kodirova Yelena
doaj   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

open access: yesAdvanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva   +9 more
wiley   +1 more source

Bounded Oscillation of a Forced Nonlinear Neutral Differential Equation

open access: yesAbstract and Applied Analysis, 2012
This paper is concerned with the nth-order forced nonlinear neutral differential equation [x(t)-p(t)x(τ(t))](n)+∑i=1mqi(t)fi(x(σi1(t)),x(σi2(t)),…,x(σiki(t)))=g(t),  t≥t0.
Zeqing Liu   +3 more
doaj   +1 more source

El Hermanito: El Niño's overlooked little brother in the Atlantic [PDF]

open access: yes, 1996
An oscillation with a period of about 30 months has been identified in the equatorial Atlantic by analyzing sea surface temperature (SST) observations for the period 1949-1991.
Frey, H., Groetzner, A., Latif, Mojib
core  

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

open access: yesAdvanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Universal In Situ Isotope Exchange Raman Spectroscopy (IERS) Methodology for Measuring Oxygen Surface Exchange Dynamics Using a Probe Layer

open access: yesAdvanced Functional Materials, EarlyView.
A bespoke multilayer thin film configuration has been designed, which overcomes the material dependency of conventional isotope exchange Raman spectroscopy (IERS). This universal IERS methodology is efficient, non‐destructive and provides additional structural information and time resolution, which can be further extended to various isotopic elements ...
Zonghao Shen   +7 more
wiley   +1 more source

Hyperresponsiveness to inhaled but not intravenous methacholine during acute respiratory syncytial virus infection in mice

open access: yesRespiratory Research, 2005
Background To characterise the acute physiological and inflammatory changes induced by low-dose RSV infection in mice. Methods BALB/c mice were infected as adults (8 wk) or weanlings (3 wk) with 1 × 105 pfu of RSV A2 or vehicle (intranasal, 30 μl ...
Colasurdo Giuseppe N   +6 more
doaj   +1 more source

Synchronization of Coupled Forced Oscillators

open access: yesJournal of Mathematical Analysis and Applications, 1998
The authors consider an array of diffusively coupled Josephine junctions with periodic forcing. By using the theory of attractors and stability theory they are able to prove the phenomena of synchronization when the parameters of the system satisfy certain conditions.
Chan, Whei-Ching C, Chao, Yi-Duo
openaire   +1 more source

Specialized physiological studies in support of manned space flight [PDF]

open access: yes
Research in aerospace medicine is presented. The reports discussed include: circulatory and respiratory transients during and after orthostasis and the effects of beta adrenergic blockade; the determination of total body water by an ethanol dilution ...
Luft, U. C.
core   +1 more source

Guidelines for Computing Longitudinal Dynamic Stability Characteristics of a Subsonic Transport [PDF]

open access: yes, 2010
A systematic study is presented to guide the selection of a numerical solution strategy for URANS computation of a subsonic transport configuration undergoing simulated forced oscillation about its pitch axis.
Frank, Neal T.   +2 more
core   +1 more source

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