Results 51 to 60 of about 6,931,000 (372)

Reviews of bearing vibration measurement using fast Fourier transform and enhanced fast Fourier transform algorithms

open access: yesAdvances in Mechanical Engineering, 2019
The rolling element bearing is one of the most critical components in a machine. Vibration signals resulting from these bearings imply important bearing defect information related to the machinery faults.
H. Lin, Yu-Chen Ye
semanticscholar   +1 more source

Drill Tools for Earth and space design of a novel longitudinal-torsional ultrasonic transducer [PDF]

open access: yes, 2012
Measurement of complex combinations of different vibration modes operating together at ultrasonic frequencies can be carried out using 3-D laser ...
Al-Budairi, Hassan   +2 more
core  

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

open access: yesFEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Human response to vibration in residential environments, technical report 1 : measurement of vibration exposure [PDF]

open access: yes, 2012
The Technical Report 1 describes the research undertaken to develop a method by which human exposure to vibration in residential environments can be assessed.
Elliott, AS   +7 more
core  

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Application of fiber optic sensors for vibration and ignition monitoring of a belt conveyor system [PDF]

open access: yes, 2019
The belt conveyor serves as the main coal transport equipment in a coal mine and its safe operation is the lifeline of safety in coal mine production.
Grattan, K. T. V.   +7 more
core   +1 more source

Acoustic Measures Capture Speech Dysfunction in Spinocerebellar Ataxia

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Spinocerebellar ataxias (SCA) are hereditary cerebellar degenerative disorders with a common feature of dysarthria, involving impaired phonatory and articulatory control of speech, thereby affecting social communication. In this study, we investigated whether acoustic measures could objectively measure speech dysfunction and identify
Zena Fadel   +5 more
wiley   +1 more source

Finite element analysis and measurement of vibration responses of cryomodule 1.3 GHz superconducting accelerator

open access: yesHe jishu, 2022
BackgroundThe superconducting cryomodule used in Shanghai high repetition rate X-ray freedom-electron laser (XFEL) and extreme light facility (SHINE) requires strict control of the position jitter tolerance which generally does not exceed 10% of the beam
ZHEN Tingting   +4 more
doaj   +1 more source

Emitted vibration measurement device and method [PDF]

open access: yes, 1986
This invention is directed to a method and apparatus for measuring emitted vibrational forces produced by a reaction wheel assembly due to imbalances, misalignment, bearing defects and the like.
Gisler, G. L.
core   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

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