Results 21 to 30 of about 45,208 (290)
Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
core +1 more source
Diagnostics of Corrosion Protection Potential for Electric Water Heaters [PDF]
MATEC Web of Conferences, 2019 The paper represents the mathematical model for diagnostics of the corrosion protection potential for the electric water heaters (EWH). The research objectives are the problem of determining the EWH corrosion protection technical condition during its ...
Martynyuk Valeriy +2 more
doaj +1 more source
, 2011 An investigation has been undertaken into acoustic iridescence, exploring how a device can be constructed which alter sound waves, in a similar way to structures in nature that act on light to produce optical iridescence.
Cox, TJ
core +1 more source
A Test Method for Acoustic Emission Properties of Natural Cellulose Fiber-Reinforced Composites
Applied Sciences, 2021 To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum ...
Fanxizi Liu +5 more
doaj +1 more source
Pulmonary Functions and Inflammatory Biomarkers in Post-Pulmonary Tuberculosis Sequelae [PDF]
Tuberculosis and Respiratory Diseases, 2022 Background Post-tuberculosis (TB) sequelae is a commonly encountered clinical entity, especially in high TB burden countries. This may represent chronic anatomic sequelae of previously treated TB, with frequent symptomatic presentation.
Kumar Shanmugasundaram +3 more
doaj +1 more source
Oscillator phase noise: a tutorial [PDF]
, 2000 Linear time-invariant (LTI) phase noise theories provide important qualitative design insights but are limited in their quantitative predictive power.
Hajimiri, Ali, Lee, Thomas H.
core +1 more source
Investigations on the Performance of Various Horizontal Ground Electrodes
Energies, 2021 Experimental work on grounding systems has shown that the characteristics of grounding systems under high impulse conditions are different than those obtained at steady-state conditions.
Hanis Hamizah Hizamul-Din +4 more
doaj +1 more source
Issues for computer modelling of room acoustics in non-concert hall settings [PDF]
, 2005 The basic principle of common room acoustics computer models is the energy-based geometrical room acoustics theory. The energy-based calculation relies on the averaging effect provided when there are many reflections from many different directions, which
C. I. Chessell +3 more
core +3 more sources
Reference values of respiratory impedance with impulse oscillometry in healthy Chinese adults [PDF]
Journal of Thoracic Disease, 2020 Abstract Background: Impulse oscillometry (IOS) is a non-invasive pulmonary function test for measuring respiratory impedance. Available reference equations of IOS indices for adults are limited. The aim of this study was to develop reference equations of IOS indices for Chinese adults.Methods: In a multicentral, cross-sessional study of ...
Xiaolin Liang +11 more
openaire +2 more sources
Impulse-Regime CRLH Resonator for Tunable Pulse Rate Multiplication [PDF]
, 2009 A novel tunable microwave broadband resonator, inspired from optical laser systems, is presented. In contrast to usual harmonic resonators, the proposed device is based on broadband composite right/left handed metamaterial lines.
Caloz, Christophe +3 more
core +3 more sources