Thermal and Mechanical Characterizations of W-armoured
... figure 4-a, and it can be observed that the adapted theoretical relation does not fit at all to the experimental results. As a consequence, an adaption of the Hall-Petch relation by fitting the experimental data has been carried out, leading to a reassessment of parameters ‘a’ and ‘b’ at 65.5 and 7 ...
... figure 4-a, and it can be observed that the adapted theoretical relation does not fit at all to the experimental results. As a consequence, an adaption of the Hall-Petch relation by fitting the experimental data has been carried out, leading to a reassessment of parameters ‘a’ and ‘b’ at 65.5 and 7 ...
Observation of preferred instability modes in a mechanically
... fostered any time high mixing efficiency is sought for. More interesting, perhaps, is that initially laminar flows may react differently to disturbances of different frequencies: a given disturbance may be damped or amplified so that turbulence may develop or not, at more or less fast rates. Consequ ...
... fostered any time high mixing efficiency is sought for. More interesting, perhaps, is that initially laminar flows may react differently to disturbances of different frequencies: a given disturbance may be damped or amplified so that turbulence may develop or not, at more or less fast rates. Consequ ...
selection and evaluation of materials for thermoelectric applications
... It is clear that in order to obtain a high figure of merit, a large Seebeck coefficient and high electrical conductivity are required, as well as a low thermal conductivity. Although it is essentially true that the search for better thermoelectric materials amounts to maximizing ZT, there are nevert ...
... It is clear that in order to obtain a high figure of merit, a large Seebeck coefficient and high electrical conductivity are required, as well as a low thermal conductivity. Although it is essentially true that the search for better thermoelectric materials amounts to maximizing ZT, there are nevert ...
A negative permeability material at red light
... resonance of a periodic array of coupled silver strips with sub-wavelength periodicity is always accompanied by an electric anti-resonance; this is the periodicity effect and it does not occur for the case of an isolated strip pair of the same structural dimensions and materials. Recent studies [3,5 ...
... resonance of a periodic array of coupled silver strips with sub-wavelength periodicity is always accompanied by an electric anti-resonance; this is the periodicity effect and it does not occur for the case of an isolated strip pair of the same structural dimensions and materials. Recent studies [3,5 ...
Absorption of low-loss optical materials measured at 1064 nm by a
... The main source of absorption at the Nd:YAG wavelength is the presence of OH ions. We verified the correlation between the absorption coefficient and the OH contamination, using 15 samples from different batches with absorption ranging from 0.4 to 4 ppm兾cm. We used Suprasil 311 and Suprasil 311SV sa ...
... The main source of absorption at the Nd:YAG wavelength is the presence of OH ions. We verified the correlation between the absorption coefficient and the OH contamination, using 15 samples from different batches with absorption ranging from 0.4 to 4 ppm兾cm. We used Suprasil 311 and Suprasil 311SV sa ...
Technical Note LIGO- T030087-00-R x/xx/99
... throughout the Advanced LIGO band. It may be possible to redesign the scanned laser system to avoid this noise coupling, but we have not found one yet that would not be very delicate to design. Therefore, we instead endorse a ‘staring’ laser system, in which the CO2 laser intensity pattern is fixed ...
... throughout the Advanced LIGO band. It may be possible to redesign the scanned laser system to avoid this noise coupling, but we have not found one yet that would not be very delicate to design. Therefore, we instead endorse a ‘staring’ laser system, in which the CO2 laser intensity pattern is fixed ...
PDF
... the noise level of the invariant data is rather high, the observed transition is nonetheless important, since it is clearly indicative of the development of microphase separation at the transition temperature, rather than a redistribution or reorganization of existing microphases. The present experi ...
... the noise level of the invariant data is rather high, the observed transition is nonetheless important, since it is clearly indicative of the development of microphase separation at the transition temperature, rather than a redistribution or reorganization of existing microphases. The present experi ...
Fiberoptic Sample Holder (FOSH): Characteristics and Uses APPLICATION NOTE 1056-201
... The sample-holder section of the FOSH consists of a spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid ...
... The sample-holder section of the FOSH consists of a spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid ...
Two-Photon Excited Fluorescence Microscopy - Spectra
... When fluorophores are excited by either a one- or a twophoton absorption process, they may stop emitting fluorescent light if the intensity of the excitation light is too high or the exposure time is too long. This event, termed photobleaching, is caused by photon-induced chemical damage of the mol ...
... When fluorophores are excited by either a one- or a twophoton absorption process, they may stop emitting fluorescent light if the intensity of the excitation light is too high or the exposure time is too long. This event, termed photobleaching, is caused by photon-induced chemical damage of the mol ...
Magnetostriction of GdAg2, PrFe4As12, and GdVO3 measured with
... To determine the thermal expansion coefficient, two physical quantities (displacement and temperature) must be measured on a sample that is undergoing a thermal cycle. Three of the main techniques used for CTE measurement are dilatometry, interferometry, and thermo mechanical analysis. Optical imagi ...
... To determine the thermal expansion coefficient, two physical quantities (displacement and temperature) must be measured on a sample that is undergoing a thermal cycle. Three of the main techniques used for CTE measurement are dilatometry, interferometry, and thermo mechanical analysis. Optical imagi ...
Confocal Live Cell Microscopy
... per pixel. Line scanners address this problem by illuminating one line at a time, and using a CCD line detector to acquire a whole row of pixels at once, thus speeding up the acquisition step. Z-stack: A set of confocal images taken from the specimen so that the image area along the x- and y-axes re ...
... per pixel. Line scanners address this problem by illuminating one line at a time, and using a CCD line detector to acquire a whole row of pixels at once, thus speeding up the acquisition step. Z-stack: A set of confocal images taken from the specimen so that the image area along the x- and y-axes re ...
Faraday Rotation - Northeastern University
... β=dφ/dρ, which relates the FR angle φ to the measured polarization ρ. First, note that the angle of the linear polarizer POL-1 is rotated by the micrometer. The angle of the polarizer φ is a function of the micrometer setting D. The calcite polarizer is installed in a rotating mount which has two mo ...
... β=dφ/dρ, which relates the FR angle φ to the measured polarization ρ. First, note that the angle of the linear polarizer POL-1 is rotated by the micrometer. The angle of the polarizer φ is a function of the micrometer setting D. The calcite polarizer is installed in a rotating mount which has two mo ...
External Reflection from Omnidirectional Dielectric Mirror Fibers
... is the speed of light in a vacuum, and n0 is the refractive index of the ambient medium), and the modes between the 35° lines correspond Table 1. Calculated and experimental photonic band gap positions for fibers drawn to a 400-m OD. Calculated values were obtained with the normalized frequency val ...
... is the speed of light in a vacuum, and n0 is the refractive index of the ambient medium), and the modes between the 35° lines correspond Table 1. Calculated and experimental photonic band gap positions for fibers drawn to a 400-m OD. Calculated values were obtained with the normalized frequency val ...
IMAGING WITH THZ PULSES TX 7725
... multiple reflections arising from the time-domain FabryPerot effect are used to extract the thickness of the material as an independent measurement. A gradient search minimizes the difference between the model and the measured signals, over a range of thicknesses. Our model includes the first transm ...
... multiple reflections arising from the time-domain FabryPerot effect are used to extract the thickness of the material as an independent measurement. A gradient search minimizes the difference between the model and the measured signals, over a range of thicknesses. Our model includes the first transm ...
12. CONFOCAL MICROSCOPY • Confocal microscopy can render
... rejecting much of the out of focus light via a pinhole. The image is reconstructed serially, i.e. point by point, using a single photodetector, rather than in parallel (in bright field, phase contrast, etc.), where a 2D image is recorded via a detector array, such as a camera. The illumination l ...
... rejecting much of the out of focus light via a pinhole. The image is reconstructed serially, i.e. point by point, using a single photodetector, rather than in parallel (in bright field, phase contrast, etc.), where a 2D image is recorded via a detector array, such as a camera. The illumination l ...
Induced nanoscale deformations in polymers using atomic
... simulation of the problem indicates that the screening factor value k ⬇ 0.9 produces an electric field inside a polymer film of the order of 108 – 109 V m−1,17 well below the electric breakdown threshold. Equation (9) presents an averaged field instead of Ein共r兲 or Eout共r兲 excluding self-action.13 T ...
... simulation of the problem indicates that the screening factor value k ⬇ 0.9 produces an electric field inside a polymer film of the order of 108 – 109 V m−1,17 well below the electric breakdown threshold. Equation (9) presents an averaged field instead of Ein共r兲 or Eout共r兲 excluding self-action.13 T ...
Molecular beam epitaxy of periodic BaF2 /PbEuSe layers on Si„111…
... have similar lattice constants and thermal expansion coefficients, they are lattice and thermal mismatched with Si. For example, at room temperature the lattice mismatch between Si and BaF2 is about 14.2%, while the thermal expansion coefficient of Si is about seven times lower than that of BaF2. Ho ...
... have similar lattice constants and thermal expansion coefficients, they are lattice and thermal mismatched with Si. For example, at room temperature the lattice mismatch between Si and BaF2 is about 14.2%, while the thermal expansion coefficient of Si is about seven times lower than that of BaF2. Ho ...
12. confocal microscopy.
... The principle of confocal microscopy was described prior to the invention of lasers [Ref Minsky Patent 1957]. However, today most confocal systems use lasers for illumination. The confocal imaging system can operate either in transmission or reflection, as shown in Fig. 1. In both cases, the out of ...
... The principle of confocal microscopy was described prior to the invention of lasers [Ref Minsky Patent 1957]. However, today most confocal systems use lasers for illumination. The confocal imaging system can operate either in transmission or reflection, as shown in Fig. 1. In both cases, the out of ...
NONDESTRUCTIVE EVALUATION OF PLEXIGLAS MATERIALS USING R. Montanini
... thermography lies on the available range of frequencies for the heat flux modulation, which may be not sufficiently low to detect deeper defects in materials of very low thermal diffusivity and/or large thickness. Another approach is pulse thermography, which can be obtained by stimulating the part ...
... thermography lies on the available range of frequencies for the heat flux modulation, which may be not sufficiently low to detect deeper defects in materials of very low thermal diffusivity and/or large thickness. Another approach is pulse thermography, which can be obtained by stimulating the part ...
High temperature measurement and characterisation of
... This technique measures the expansion (or contraction) resulting from the application of an electric field to the piezoelectric material. This lends itself to assessment of the actuating capabilities of a material at high electric field, but values for piezoelectric coefficient in the low field limi ...
... This technique measures the expansion (or contraction) resulting from the application of an electric field to the piezoelectric material. This lends itself to assessment of the actuating capabilities of a material at high electric field, but values for piezoelectric coefficient in the low field limi ...
Effective Thermophysical Properties of Thermal Interface Materials
... before test using ASTM D 374 - Method C. The single material layer or stacked layers are subjected to 3 M P a pressure so that the thermal contact resistance is reduced to an insignificant level. The insulating material is placed around the calorimeter sections and the joint temperature is maintained ...
... before test using ASTM D 374 - Method C. The single material layer or stacked layers are subjected to 3 M P a pressure so that the thermal contact resistance is reduced to an insignificant level. The insulating material is placed around the calorimeter sections and the joint temperature is maintained ...
Thin film patterning by surface-plasmon-induced
... periodic in-plane temperature profiles are generated in the PMMA due to the nonradiative damping of SPP interference patterns. Computer simulations on the temperature-gradient-driven mass transport confirm that thermocapillarity is the dominating mechanism of the observed surface patterning. © 2007 Am ...
... periodic in-plane temperature profiles are generated in the PMMA due to the nonradiative damping of SPP interference patterns. Computer simulations on the temperature-gradient-driven mass transport confirm that thermocapillarity is the dominating mechanism of the observed surface patterning. © 2007 Am ...
A Guide for Atomic Force Microscopy Analysis of Soft
... Concerning to handling details, one of the most important factors come from the tip. In fact, both tip geometry and composition are known to influence the image quality. The major effects with regards to tip geometry are those leading surface feature broadening as a result of tip curvature’s radius ...
... Concerning to handling details, one of the most important factors come from the tip. In fact, both tip geometry and composition are known to influence the image quality. The major effects with regards to tip geometry are those leading surface feature broadening as a result of tip curvature’s radius ...
Temperature Profiling of VCSELs by Thermoreflectance Microscopy
... power (measured with respect to the threshold), for the oxide-confined SM VCSEL is measured to be 0.173 and 0.112 nm/mW, respectively. By fixing the injected current at 4 mA and increasing the heat sink temperature, the red-shift of 0.063 nm C and, 0.055 nm C are rates of measured for the - and the ...
... power (measured with respect to the threshold), for the oxide-confined SM VCSEL is measured to be 0.173 and 0.112 nm/mW, respectively. By fixing the injected current at 4 mA and increasing the heat sink temperature, the red-shift of 0.063 nm C and, 0.055 nm C are rates of measured for the - and the ...
From near-field optics to optical antennas
... molecules was then collected through a distant lens. Such imaging has been applied to a variety of systems, including conjugated polymers and membrane proteins. Indeed, recent work from the groups of María García-Parajo and Christiane Höppener demonstrated that it is possible to image and identify s ...
... molecules was then collected through a distant lens. Such imaging has been applied to a variety of systems, including conjugated polymers and membrane proteins. Indeed, recent work from the groups of María García-Parajo and Christiane Höppener demonstrated that it is possible to image and identify s ...
Scanning joule expansion microscopy
Scanning Joule Expansion Microscopy is a form of scanning probe microscopy heavily based on atomic force microscopy that maps the temperature distribution along a surface. Resolutions down to 10 nm have been achieved and 1 nm resolution is theoretically possible. Thermal measurements at the nanometer scale are of both academic and industrial interest, particularly in regards to nanomaterials and modern integrated circuits.