10 - E-Prints Complutense
... hacerme sonreír cada día, también tiene que aportar su granito de arena cada vez que puede, ya sea en el diseño de la portada de mi tesis, en el cartel de las Paces o en ...
... hacerme sonreír cada día, también tiene que aportar su granito de arena cada vez que puede, ya sea en el diseño de la portada de mi tesis, en el cartel de las Paces o en ...
Lecture 45
... same way as the periodic potential in a crystal affects the electron motion by defining allowed and forbidden electronic energy bands. Photonic crystals contain regularly repeating internal regions of high and low dielectric constant. Photons (as waves) propagate through this structure - or not - de ...
... same way as the periodic potential in a crystal affects the electron motion by defining allowed and forbidden electronic energy bands. Photonic crystals contain regularly repeating internal regions of high and low dielectric constant. Photons (as waves) propagate through this structure - or not - de ...
Acoustical properties of air-saturated porous material with
... assumed that Reðkmp Amp Þ 1; Reðkde Ade Þ 1 so that the wave inside the pores is plane. Here, kmp and kde are the wavenumbers in the main pore and in the dead-ends. The period h can be comparable to the wavelength. In this case, the wavenumber q of Bloch waves (i.e., waves that propagate through ...
... assumed that Reðkmp Amp Þ 1; Reðkde Ade Þ 1 so that the wave inside the pores is plane. Here, kmp and kde are the wavenumbers in the main pore and in the dead-ends. The period h can be comparable to the wavelength. In this case, the wavenumber q of Bloch waves (i.e., waves that propagate through ...
Effect of Zn(NO3)2 filler on the dielectric permittivity and electrical
... amorphous interfacial effect.20 Further, it is a transparent thermoplastic polymer that possesses moderate physical properties. Its dielectric constant is relatively high (∼3–4.9) at room temperature. At the same time, its dielectric loss is also very low over wide frequency range.21 It is interesti ...
... amorphous interfacial effect.20 Further, it is a transparent thermoplastic polymer that possesses moderate physical properties. Its dielectric constant is relatively high (∼3–4.9) at room temperature. At the same time, its dielectric loss is also very low over wide frequency range.21 It is interesti ...
Connecting mesoscopic and macroscopic scale lengths for
... energy transmission (pass bands) and with near-zero energy transmission (stop- band with cutoff frequency) e.g. (Nakagawa et al., 2000). Corresponding discrete theory has been developed in 1D situation. Although experimental measurement techniques are becoming ever more accurate and sophisticated, t ...
... energy transmission (pass bands) and with near-zero energy transmission (stop- band with cutoff frequency) e.g. (Nakagawa et al., 2000). Corresponding discrete theory has been developed in 1D situation. Although experimental measurement techniques are becoming ever more accurate and sophisticated, t ...
Ultrasonic Testing
... Surface (or Rayleigh) waves travel at the surface of a relatively thick solid material penetrating to a depth of one wavelength. A surface wave is a combination of both a longitudinal and transverse motion which results in an elliptical motion as shown in the image. The major axis of the ellipse ...
... Surface (or Rayleigh) waves travel at the surface of a relatively thick solid material penetrating to a depth of one wavelength. A surface wave is a combination of both a longitudinal and transverse motion which results in an elliptical motion as shown in the image. The major axis of the ellipse ...
Engineering metal oxide nanostructures for the
... sensing film (Δn = ncore-nfilm) at a coating thickness of 2μm for small film index variations. The above simulation were examined for an operating wavelength of λ = 1.55μm. ...
... sensing film (Δn = ncore-nfilm) at a coating thickness of 2μm for small film index variations. The above simulation were examined for an operating wavelength of λ = 1.55μm. ...
Sound in medicine
... * High –frequency ultrasound (short-wavelength) results in better resolution than the low frequency. * High-frequency ultrasound results in shallow penetration. For this reason, highfrequency transducers, up to 15 MHz, are employed for ultrasonic examination of small superficial structures such as e ...
... * High –frequency ultrasound (short-wavelength) results in better resolution than the low frequency. * High-frequency ultrasound results in shallow penetration. For this reason, highfrequency transducers, up to 15 MHz, are employed for ultrasonic examination of small superficial structures such as e ...
Negative stiffness and negative Poisson`s ratio in materials which
... freedom beyond those ordinarily anticipated. We consider viscoelastic damping and negative stiffness. Negative stiffness occurs in structures with stored energy, e.g. in some post-buckled elements. Heterogeneous systems containing negative stiffness elements can exhibit extreme values of stiffness o ...
... freedom beyond those ordinarily anticipated. We consider viscoelastic damping and negative stiffness. Negative stiffness occurs in structures with stored energy, e.g. in some post-buckled elements. Heterogeneous systems containing negative stiffness elements can exhibit extreme values of stiffness o ...
A DEVICE, A METHOD AND A SYSTEM FOR DETECTING
... depends on their properties. Thus, quality control in the material science, food industry, bio-sensing can be conducted based on sensing electrical properties of the materials. ...
... depends on their properties. Thus, quality control in the material science, food industry, bio-sensing can be conducted based on sensing electrical properties of the materials. ...
Ultrasound Primer / Basics
... The basic purpose of the transducer wear plate is to protect the transducer element from the testing environment. In the case of contact transducers, the wear plate must be a durable and corrosion resistant material in order to withstand the wear caused by use on materials such as steel. For immersi ...
... The basic purpose of the transducer wear plate is to protect the transducer element from the testing environment. In the case of contact transducers, the wear plate must be a durable and corrosion resistant material in order to withstand the wear caused by use on materials such as steel. For immersi ...
Laboratory experiments for exploring the surface plasmon resonance
... coupling of this electron oscillation with the electromagnetic field is the most straightforward way to detect this wave and the resulting optical wave is the surface plasmon (SP) wave. The mechanical wave (oscillation of charges) and the optical wave (oscillation of the electric field) are inextric ...
... coupling of this electron oscillation with the electromagnetic field is the most straightforward way to detect this wave and the resulting optical wave is the surface plasmon (SP) wave. The mechanical wave (oscillation of charges) and the optical wave (oscillation of the electric field) are inextric ...
Accepted version - Queen Mary University of London
... As described earlier, the structure of BNT-based materials is sensitive to the application of an electric field. According to in-situ TEM studies on 0.91BNT-0.06BT-0.03KNN the reversible appearance of ferroelectric domains can be observed by applying an alternating electric field,23 which is linked ...
... As described earlier, the structure of BNT-based materials is sensitive to the application of an electric field. According to in-situ TEM studies on 0.91BNT-0.06BT-0.03KNN the reversible appearance of ferroelectric domains can be observed by applying an alternating electric field,23 which is linked ...
Document
... the crystals themselves deform and contract a little. If the p.d. applied is alternating then the crystal vibrates at the same frequency and sends out ultrasonic waves. For ultrasound - lead zirconate titanate (PZT) crystals are used. This process also works in reverse. The piezoelectric crystal act ...
... the crystals themselves deform and contract a little. If the p.d. applied is alternating then the crystal vibrates at the same frequency and sends out ultrasonic waves. For ultrasound - lead zirconate titanate (PZT) crystals are used. This process also works in reverse. The piezoelectric crystal act ...
M F L OLDING THE
... same phase along both the forward and backward directions while the odd state decays with opposite phase. When the two tunneling processes are combined—because of the phase difference—the decaying amplitudes cancel along the backward direction of the transmission line. For cancellation to occur, the ...
... same phase along both the forward and backward directions while the odd state decays with opposite phase. When the two tunneling processes are combined—because of the phase difference—the decaying amplitudes cancel along the backward direction of the transmission line. For cancellation to occur, the ...
Dielectric dispersion and microwave dielectric study of marbles in
... 3 Results and Discussion 3.1 Low frequency dielectric dispersion ...
... 3 Results and Discussion 3.1 Low frequency dielectric dispersion ...
FINITE DIFFERENCE TIME DOMAIN MODELING OF LIGHT
... incorporating the vector nature of e.m. fields, have been developed. A largely used technique, which gives results with good agreement with the experimental ones, is the Plane Wave Method (PWM) where an infinite period lattice is assumed. This method is no longer valid when a linear defect or a point ...
... incorporating the vector nature of e.m. fields, have been developed. A largely used technique, which gives results with good agreement with the experimental ones, is the Plane Wave Method (PWM) where an infinite period lattice is assumed. This method is no longer valid when a linear defect or a point ...
Krejci.I_Electrochemical Cell Constant Determination
... (electrolytes) requires determination of the resistive cell (sensor) constant and its frequency characteristic. The methodology of the measurement and instrumentation used are described. The results, that have been achieved, are shown and discussed. 1.1. Electrical impedance Electrical impedance des ...
... (electrolytes) requires determination of the resistive cell (sensor) constant and its frequency characteristic. The methodology of the measurement and instrumentation used are described. The results, that have been achieved, are shown and discussed. 1.1. Electrical impedance Electrical impedance des ...
The Microstrip Ring Resonator for Characterising Microwave Materials
... properties, which can be used to infer information about the dielectric. The radiation behaviour is also found to be important, as this has implications on the loss in a ring resonator. To use the ring for microstrip measurements, an annular ring is constructed into which microwaves are injected. Wh ...
... properties, which can be used to infer information about the dielectric. The radiation behaviour is also found to be important, as this has implications on the loss in a ring resonator. To use the ring for microstrip measurements, an annular ring is constructed into which microwaves are injected. Wh ...
BN paperMRS.WEB
... raw material is subjected to a high uniaxial compressive force at an elevated temperature. This results in an orderly arrangement of the boron and nitrogen atoms (a structure similar to that of graphite, see Figure 1). Boron nitride has previously been studied in the ultraviolet, optical, infrared, ...
... raw material is subjected to a high uniaxial compressive force at an elevated temperature. This results in an orderly arrangement of the boron and nitrogen atoms (a structure similar to that of graphite, see Figure 1). Boron nitride has previously been studied in the ultraviolet, optical, infrared, ...
Material Analysis and Application for Radio Frequency
... Our environment is full of radio frequency (RF) electromagnetic radiation due to rapid progress of wireless communication technologies, which have many applications, such as base stations of mobile communication networks and wireless internet antennas. In the context of Electromagnetic Compatibility ...
... Our environment is full of radio frequency (RF) electromagnetic radiation due to rapid progress of wireless communication technologies, which have many applications, such as base stations of mobile communication networks and wireless internet antennas. In the context of Electromagnetic Compatibility ...
INSTRUCTIUNI DE REDACTARE
... eight solvents, five of them polar (distilled water, ethanol, 3% acetic acid, isopropylic alcohol, acetone) and three nonpolar (hexane, benzene, petroleum ether). Our purpose was to establish the optimal microwave extraction parameters and to compare the results with the classical method of extracti ...
... eight solvents, five of them polar (distilled water, ethanol, 3% acetic acid, isopropylic alcohol, acetone) and three nonpolar (hexane, benzene, petroleum ether). Our purpose was to establish the optimal microwave extraction parameters and to compare the results with the classical method of extracti ...
Microstrip, Stripline, and CPW Design
... Stripline Design Stripline requires three layers of conductors where the internal conductor is commonly called the “hot conductor,” while the other two, always connected at signal ground, are called “cold” or “ground” conductors. The hot conductor is embedded in a homogeneous and isotropic dielectri ...
... Stripline Design Stripline requires three layers of conductors where the internal conductor is commonly called the “hot conductor,” while the other two, always connected at signal ground, are called “cold” or “ground” conductors. The hot conductor is embedded in a homogeneous and isotropic dielectri ...
Metamaterial antenna
Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized (electrically small) antenna systems. Their purpose, as with any electromagnetic antenna, is to launch energy into free space. However, this class of antenna incorporates metamaterials, which are materials engineered with novel, often microscopic, structures to produce unusual physical properties. Antenna designs incorporating metamaterials can step-up the antenna's radiated power.Conventional antennas that are very small compared to the wavelength reflect most of the signal back to the source. A metamaterial antenna behaves as if it were much larger than its actual size, because its novel structure stores and re-radiates energy. Established lithography techniques can be used to print metamaterial elements on a PC board.These novel antennas aid applications such as portable interaction with satellites, wide angle beam steering, emergency communications devices, micro-sensors and portable ground-penetrating radars to search for geophysical features.Some applications for metamaterial antennas are wireless communication, space communications, GPS, satellites, space vehicle navigation and airplanes.