Results 41 to 50 of about 3,434 (176)

Influence of cutting frequency and height on phytoestrogen levels in red clover and white clover

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Phytoestrogens are a class of secondary compounds naturally produced by some forage legumes, including red clover (Trifolium pratense L.) and white clover (Trifolium repens L.). Previous research showed that phytoestrogens can have beneficial and negative effects on animal health and reproductive function.
Palash Mandal, Marta R. M. Lima, Nicholas D. Warren, André F. Brito, Richard G. Smith   +4 more
wiley   +1 more source

Discordancy of two common methods of measuring feather hydrophobicity

Journal of Avian Biology, Volume 2025, Issue 3, May 2025.
Feather structure contributes greatly to a birds' ability to repel water, which is essential for thermoregulation and energy use. Water repellency of feathers has traditionally been inferred by measuring a structural index based on the distance between the feather radii and vane.
Sarah C. Deckel, Chad L. Seewagen
wiley   +1 more source

Adaptive Vibration Control of the Moving Cage in the 4 ×$\times$ 4 Hyperbolic PDE‐ODE Model of the Dual‐Cable Mining Elevator

IET Control Theory &Applications, Volume 19, Issue 1, January/December 2025.
This paper proposes an observer‐based adaptive output‐feedback boundary control to stabilize the vibrations of the moving cage of a dual‐cable mining elevator. This system is comprised of two mechanically jointed winding drums that drive the two cables through the floating sheaves to lift the cage.
Elham Aarabi, Mohammadali Ghadiri‐Modarres, Mohsen Mojiri   +2 more
wiley   +1 more source

Research on Suppression of Vibration Caused by Combustion Pressure Pulsation in Aircraft Engines

Shock and Vibration, Volume 2024, Issue 1, 2024.
Abnormal high‐energy narrowband signals appeared in the aircraft engine test. By analyzing the characteristics of the vibration signals and the pressure pulsation signals in the measurement point data of the engine, it can be speculated that the abnormal vibration energy of the engine is not related to the operation of rotating parts, which upends a ...
Liang Hong, Chao-Ping Zang, He-Jiong Ji, Qiu-Xia Yu, Yun-Fan Jiang, Lian Shen, Cong Gao   +6 more
wiley   +1 more source

Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]

, 2012
The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Gicquel, Laurent Y.M., Müller, Jens-Dominik, Poinsot, Thierry, Staffelbach, Gabriel, Wolf, Pierre   +4 more
core   +4 more sources

Investigation on the stability of the Rijke-type thermoacoustic system with an axially distributed heat source

Journal of Low Frequency Noise, Vibration and Active Control
Due to the incurred damages to the combustors, large-amplitude self-sustained thermoacoustic oscillations are unwanted in many propulsion systems, such as liquid/solid rocket motors and aero-engines.
Kai Pang, Yuanhao Wang, Xinyan Li, Hongquan Sun, Chenzhen Ji   +4 more
doaj   +1 more source

Nonlinear analytical flame models with amplitude-dependent time-lag distributions [PDF]

, 2017
In the present work, we formulate a new method to represent a given Flame Describing Function by analytical expressions. The underlying idea is motivated by the observation that different types of perturbations in a burner travel with different speeds ...
Bigongiari, A, Gopinathan, S, Heckl, MA, Iurashev, D   +3 more
core   +1 more source

Weakly nonlinear thermoacoustics for stacks with slowly varying pore cross-sections [PDF]

A general theory of thermoacoustics is derived for arbitrary stack pores. Previous theoretical treatments of porous media are extended by considering arbitrarily shaped pores with the only restriction that the pore cross-sections vary slowly in the ...
Molenaar, J., Panhuis, P.H.M.W., in 't, Rienstra, S.W., Slot, J.J.M.   +3 more
core   +2 more sources

NUMERICAL MODELLING OF THERMOACOUSTIC PHENOMENON AS CONTRIBUTION TO THERMOACOUSTIC ENGINE MODEL

TASK Quarterly, 2010
The presented paper shows our first step into the numerical modelling of the thermoacoustic phenomenon. The thermoacoustic effect has a great application potential, for instance, in thermoacoustic engines or thermoacoustic mixture separation.
LESZEK REMIORZ, SŁAWOMIR DYKAS, SEBASTIAN RULIK   +2 more
doaj  

Enhancement effect of self-excited thermoacoustic oscillating airflow on hot air drying process of white radish slices

Shipin yu jixie
ObjectiveTo investigate the enhancement effect of self-excited thermoacoustic oscillation on the drying process of solid foods.MethodsA pulsating hot air drying device based on a Rijke tube resonator structure is designed.
ZHANG Han, ZHANG Minyu, ZHAO Huachao, LI Bing, WU Zhonghua   +4 more
doaj   +1 more source