Acoustical properties of air-saturated porous material with

... the frequencies corresponding to the period. This constitutes the central originality of the present contribution. The deadend pores considered here are simple closed cavities. However, the model can account for more complex geometries including Helmholtz resonators. The aim of this work is to exten ...

... the frequencies corresponding to the period. This constitutes the central originality of the present contribution. The deadend pores considered here are simple closed cavities. However, the model can account for more complex geometries including Helmholtz resonators. The aim of this work is to exten ...

Shock-induced detonation of high explosives by high velocity impact

... understanding the complicated physical processes. Once the numerical solutions are validated with test results, the numerical tool can be used for the safety assessment of real armors. A great number of numerical studies on detonation of high explosives by projectile impact have been reported so far ...

... understanding the complicated physical processes. Once the numerical solutions are validated with test results, the numerical tool can be used for the safety assessment of real armors. A great number of numerical studies on detonation of high explosives by projectile impact have been reported so far ...

Boundless Study Slides

... • photoelectric effects In photoelectric effects, electrons are emitted from matter (metals and non-metallic solids, liquids or gases) as a consequence of their absorption of energy from electromagnetic radiation. • physical pendulum A pendulum where the rod or string is not massless, and may have e ...

... • photoelectric effects In photoelectric effects, electrons are emitted from matter (metals and non-metallic solids, liquids or gases) as a consequence of their absorption of energy from electromagnetic radiation. • physical pendulum A pendulum where the rod or string is not massless, and may have e ...

STUDY OF THZ SURFACE WAVES (TSW)

... 4-16 The theoretical output spectrum and experimental output spectrum ................60 4-17 The comparison of the time domain curves between experiment and theory ..61 ...

... 4-16 The theoretical output spectrum and experimental output spectrum ................60 4-17 The comparison of the time domain curves between experiment and theory ..61 ...

On the use of poroelastic materials for the control of the

... the problem of a plate/cavity system involving a porous material. For instance, a 共u , U兲 formulation was used in Ref. 13. The advantage of using a 共u , p兲 formulation have been discussed in details in Ref. 20. In the case of the initial formulation as proposed in this latter work, the coupling of t ...

... the problem of a plate/cavity system involving a porous material. For instance, a 共u , U兲 formulation was used in Ref. 13. The advantage of using a 共u , p兲 formulation have been discussed in details in Ref. 20. In the case of the initial formulation as proposed in this latter work, the coupling of t ...

Characterization of Acoustic Waves in Multi

... Fourier analysis. An effective way to analyze the dependence of the sensitivity on the liquid viscosity is proposed in [32]. Another approach to analyze surface acoustic waves in multi-layered structures and semiinfinite substrates is based on using orthogonal functions [13]. In particular, Laguerre ...

... Fourier analysis. An effective way to analyze the dependence of the sensitivity on the liquid viscosity is proposed in [32]. Another approach to analyze surface acoustic waves in multi-layered structures and semiinfinite substrates is based on using orthogonal functions [13]. In particular, Laguerre ...

and Amplitude-Dependent Transmission of Stress Waves in Curved

... also propagate linear elastic waves when they are excited by small-magnitude dynamic forces, relative to the static precompression applied to the system [2, 24, 25]. In this case, diatomic granular crystals (i.e., periodic chains with two particles per unit cell) support the formation of a frequency ...

... also propagate linear elastic waves when they are excited by small-magnitude dynamic forces, relative to the static precompression applied to the system [2, 24, 25]. In this case, diatomic granular crystals (i.e., periodic chains with two particles per unit cell) support the formation of a frequency ...

201_problems

... 1. In class we showed that you can solve the differential equation kx mx by “guessing” the solution xt AsinBt C . According to uniqueness and completeness, if this guess solves the equation of motion and has the correct number of adjustable constants (two, in this case), then it is the ...

... 1. In class we showed that you can solve the differential equation kx mx by “guessing” the solution xt AsinBt C . According to uniqueness and completeness, if this guess solves the equation of motion and has the correct number of adjustable constants (two, in this case), then it is the ...

What is the DP Current? - Dynamic Positioning Committee

... The question arises; how to model these two slowly varying unknown forces? Is the best way to best approach just to consider them as totally unknown without any relation to physics? I.e. just an unknown force with three independent components (Fx , Fy , M). Should there be any relationship between t ...

... The question arises; how to model these two slowly varying unknown forces? Is the best way to best approach just to consider them as totally unknown without any relation to physics? I.e. just an unknown force with three independent components (Fx , Fy , M). Should there be any relationship between t ...

A Tale of Two Limits: Fundamental Properties of Photonic-Crystal Fibers

... formally, our key assumption was not so much that the cladding is periodic, but that the inﬁmum of the cladding spectrum at each β is itself an eigenvalue, which is true for periodic claddings where Bloch’s theorem holds, but perhaps also for other cases. Finally, some numerical evidence has been pr ...

... formally, our key assumption was not so much that the cladding is periodic, but that the inﬁmum of the cladding spectrum at each β is itself an eigenvalue, which is true for periodic claddings where Bloch’s theorem holds, but perhaps also for other cases. Finally, some numerical evidence has been pr ...

Sound in medicine

... transducer, which then also receives echoes or reflections from tissue interfaces. This type of ultrasound emission is called pulse-echo technique. A-mode ultrasound employs one or tow transdure. * In a two transducer application, one transducer is used to transmit and the other to receive. For obse ...

... transducer, which then also receives echoes or reflections from tissue interfaces. This type of ultrasound emission is called pulse-echo technique. A-mode ultrasound employs one or tow transdure. * In a two transducer application, one transducer is used to transmit and the other to receive. For obse ...

M F L OLDING THE

... We can cast Maxwell’s equations for the propagation of light in mixed, loss-less dielectric media in a form reminiscent of Schrödinger’s equation. Consequently, we can use techniques for studying electrons in solids to study photon modes in photonic crystals.4,5 The main differences are that electro ...

... We can cast Maxwell’s equations for the propagation of light in mixed, loss-less dielectric media in a form reminiscent of Schrödinger’s equation. Consequently, we can use techniques for studying electrons in solids to study photon modes in photonic crystals.4,5 The main differences are that electro ...

Connecting mesoscopic and macroscopic scale lengths for

... Nevertheless, the existence of numerous theoretical models of brittle micro-cracked material based different choice of damage variables merely showed the missing of consensus in this domain e.g. (Rabier, 1989; He and Curnier, 1995). It has been recently proposed that any stiffness degradation of ela ...

... Nevertheless, the existence of numerous theoretical models of brittle micro-cracked material based different choice of damage variables merely showed the missing of consensus in this domain e.g. (Rabier, 1989; He and Curnier, 1995). It has been recently proposed that any stiffness degradation of ela ...

Laboratory experiments for exploring the surface plasmon resonance

... the boundary conditions imposed by the plane interface (see the appendix for more details). Only waves with their electric field polarized within the plane of incidence (polarization p, see figure 3) are solutions and the electric fields in media 1 and 2 are surface waves characterized by decay leng ...

... the boundary conditions imposed by the plane interface (see the appendix for more details). Only waves with their electric field polarized within the plane of incidence (polarization p, see figure 3) are solutions and the electric fields in media 1 and 2 are surface waves characterized by decay leng ...

Dyadic Green`s functions and guided surface waves for a surface

... graphene residing at the interface between two dielectrics, in which case classical Maxwell’s equations are solved exactly for an arbitrary electrical current. Related phenomena are discussed, such as plane wave reflection and transmission through graphene,11 and surface wave excitation and guidance ...

... graphene residing at the interface between two dielectrics, in which case classical Maxwell’s equations are solved exactly for an arbitrary electrical current. Related phenomena are discussed, such as plane wave reflection and transmission through graphene,11 and surface wave excitation and guidance ...

Chapter 14

... In this equation, k is the spring constant, which depends on the stiffness and other properties of the spring, and x is the distance that the spring is stretched from its equilibrium position. Not all springs obey Hooke’s law, but many do. Those that do are called elastic. Potential energy When a fo ...

... In this equation, k is the spring constant, which depends on the stiffness and other properties of the spring, and x is the distance that the spring is stretched from its equilibrium position. Not all springs obey Hooke’s law, but many do. Those that do are called elastic. Potential energy When a fo ...

Crustal Thickness of the Western U.S. (NEW!!! Brought

... Method stacks observed amplitudes at delay times predicted for each phase, for all earthquakes. ...

... Method stacks observed amplitudes at delay times predicted for each phase, for all earthquakes. ...

the Ubiquitous Science Teacher Guide

... The formula for determining the distance something will fall is d = ½ a t2, where “d” is the displacement it falls, “a” is acceleration, which on Earth is 9.8 m/s2, and “t” is time. Everything accelerates at the same rate if we can neglect air resistance. Things that affect air resistance include th ...

... The formula for determining the distance something will fall is d = ½ a t2, where “d” is the displacement it falls, “a” is acceleration, which on Earth is 9.8 m/s2, and “t” is time. Everything accelerates at the same rate if we can neglect air resistance. Things that affect air resistance include th ...

Oscillatory Motion and Waves

... The oscillations of a system in which the net force can be described by Hooke’s law are of special importance, because they are very common. They are also the simplest oscillatory systems. Simple Harmonic Motion (SHM) is the name given to oscillatory motion for a system where the net force can be de ...

... The oscillations of a system in which the net force can be described by Hooke’s law are of special importance, because they are very common. They are also the simplest oscillatory systems. Simple Harmonic Motion (SHM) is the name given to oscillatory motion for a system where the net force can be de ...

Fault kinematics in northern Central America and coupling along the

... Salvador (e.g. Alvarado et al., 2011). - In any case low coupling at subduction would not favor stress transmissions from the subducting plate to the upper plate - LaFemina et al. (2011) suggest a mechanism: collision of Cocos Ridge DeMets, 2001 ...

... Salvador (e.g. Alvarado et al., 2011). - In any case low coupling at subduction would not favor stress transmissions from the subducting plate to the upper plate - LaFemina et al. (2011) suggest a mechanism: collision of Cocos Ridge DeMets, 2001 ...

Techniques : Chromatography

... placed in an adjacent position. With a plate 3 to 4 cm wide, it is possible to place samples in as many as five or six "lanes". If identical compounds are present in two or more lanes, they should appear at the same height after the plate has been developed with solvent. The position of the spot rel ...

... placed in an adjacent position. With a plate 3 to 4 cm wide, it is possible to place samples in as many as five or six "lanes". If identical compounds are present in two or more lanes, they should appear at the same height after the plate has been developed with solvent. The position of the spot rel ...

No Slide Title - DCC

... State 4 : The remaining ETM is controlled and the carrier resonates in both arms and the recycling cavity. State 5 : The power in the IFO has stabilized at its operating level. This is the ending point for lock acquisition. Elba 2002 - Gravitational Wave Adv. Detector Workshop ...

... State 4 : The remaining ETM is controlled and the carrier resonates in both arms and the recycling cavity. State 5 : The power in the IFO has stabilized at its operating level. This is the ending point for lock acquisition. Elba 2002 - Gravitational Wave Adv. Detector Workshop ...

Levers Information

... There are no units for velocity ratio it is just a number. Velocity While speed of a moving body is important in technology there is another word that is even more important and it is velocity. To describe velocity you have to give the speed and the direction in which the body is moving. ...

... There are no units for velocity ratio it is just a number. Velocity While speed of a moving body is important in technology there is another word that is even more important and it is velocity. To describe velocity you have to give the speed and the direction in which the body is moving. ...

Content - Sedgefield Community College

... Explain how colour of light is related to absorption at surfaces and filters. Describe refraction of light in converging and diverging lenses. Explain the difference between real and virtual images. Relate the power of a lens to its shape. Recall what type of wave electromagnetic waves are and how t ...

... Explain how colour of light is related to absorption at surfaces and filters. Describe refraction of light in converging and diverging lenses. Explain the difference between real and virtual images. Relate the power of a lens to its shape. Recall what type of wave electromagnetic waves are and how t ...

Applied Electronics

... If the control grid is made slightly positive (say 1v) with respect to cathode, the helping electrostatic fields of plate and grid will accelerate the electrons towards the plate therefore the plate current is increased and at the same time some of the electrons are attracted to the grid to constitu ...

... If the control grid is made slightly positive (say 1v) with respect to cathode, the helping electrostatic fields of plate and grid will accelerate the electrons towards the plate therefore the plate current is increased and at the same time some of the electrons are attracted to the grid to constitu ...