scholarly journals Signal analysis and characterization of a micro-electro-mechanical oscillator for the study of quantum fluids

2014 ◽  
Vol 568 (3) ◽  
pp. 032003 ◽  
Author(s):  
C S Barquist ◽  
J Bauer ◽  
T Edmonds ◽  
P Zheng ◽  
W G Jiang ◽  
...  
Keyword(s):  
Signal Analysis ◽  
Quantum Fluids ◽  
Mechanical Oscillator

Signal analysis and characterization of experimental setup for the transient thermoreflectance technique

2006 ◽  
Vol 77 (8) ◽  
pp. 084901 ◽  
Author(s):  
Robert J. Stevens ◽  
Andrew N. Smith ◽  
Pamela M. Norris
Keyword(s):  
Signal Analysis ◽  
Experimental Setup

scholarly journals Crill: A novel technique to characterize nano-ligno-cellulose

2014 ◽  
Vol 29 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Sinke H. Osong ◽  
Sven Norgren ◽  
Per Engstrand ◽  
Mathias Lundberg ◽  
Peter Hansen
Keyword(s):  
Measurement Technique ◽  
Signal Analysis ◽  
Uv Light ◽  
Optical Response ◽  
Mechanical Pulp ◽  
Novel Technique ◽  
Analogue Signal ◽  
Homogenization Time

Abstract The CrillEye is a technique for qualitatively assessing loose slender and fibrillar particles created during pulping. It has also been demonstrated that the crill measurement technique can easily be used to measure the degree of fibrillation of mechanical pulp based nano-ligno-cellulose (NLC). The measurement technique is based on an optical response of a suspension at two wavelengths of light; UV and IR. The UV light contains information on both fibres and crill, while IR only contains information on fibres. The resolution on the CrillEye module is based on optical response of the pulp and on an analogue signal analysis making it concentration independent. Characterization of particlesize distribution of nano-ligno-cellulose is both important and challenging. The objective of the work presented in this paper was to study the crill values of TMP and CTMP based nano-ligno-celluloses as a function of homogenization time. Results showed that the crill value of both TMP-NLC and CTMP-NLC correlated fairly well with the homogenization time.

Signal analysis and weighted polynomial approximation

2006 ◽  
Vol 43 (2) ◽  
pp. 159-169
Author(s):  
Nguyen Xuan Ky
Keyword(s):  
Signal Analysis ◽  
Hermite Polynomials ◽  
Type Theorem ◽  
Hermite Functions ◽  
Bernstein Type ◽  
Time Frequency ◽  
Window Functions ◽  
Bernstein Type Theorem ◽  
Frequency Window

We present applications of Hermite polynomials in signal analysis. Among other result, we give a characterization of the so-called time-frequency window functions in terms of the Hermite--Fourier coefficients, a Bernstein-type theorem for the best approximations of window functions by Hermite-functions, time-frequency approximations. Some analogues for Hankel-transforms will also be considered.

Spin-Polarized Quantum Fluids and Solids

MRS Bulletin ◽  
1993 ◽  
Vol 18 (8) ◽  
pp. 38-43
Author(s):  
Kevin S. Bedell ◽  
Isaac F. Silvera ◽  
Neil S. Sullivan
Keyword(s):  
Magnetic Ordering ◽  
Quantum Fluids ◽  
Einstein Condensation ◽  
Many Body ◽  
Spin Polarized ◽  
Many Body Systems ◽  
The Rich ◽  
Bose Einstein ◽  
Physical Phenomena

The spin-polarized phases of the quantum fluids and solids, liquid 3He, solid 3He, and spin-aligned hydrogen have generated considerable excitement over the past fifteen years. The introduction of high magnetic fields (B ∼ 10–30 T) in conjunction with low temperatures (T ≲ 100 mK) has given rise to opportunities for exploring some of the new phases predicted for these materials. There is a broad range of physical phenomena that can be accessed in this regime of parameter space—unconventional superfluidity, unusual magnetic ordering, Bose-Einstein condensation and Kosterlitz-Thouless transitions, to name a few. This is most surprising since this plethora of complicated states of matter are present in some of the most uncomplicated materials. The rich variety of phases found in these materials are all examples of collective phenomena of quantum many-body systems, and they serve as prototypes for developing an understanding of magnetism and order/disorder processes in other systems, and for the design and characterization of new materials.

scholarly journals Electrostatic force microscopy for the accurate characterization of interphases in nanocomposites

2018 ◽  
Vol 9 ◽  
pp. 2999-3012
Author(s):  
Diana El Khoury ◽  
Richard Arinero ◽  
Jean-Charles Laurentie ◽  
Mikhaël Bechelany ◽  
Michel Ramonda ◽  
...  
Keyword(s):  
Signal Analysis ◽  
Electrostatic Force ◽  
Interface State ◽  
Electrostatic Force Microscopy ◽  
Polystyrene Spheres ◽  
Promising Technique ◽  
Force Microscopy ◽  
Different Types ◽  
Experimental Protocols

The unusual properties of nanocomposites are commonly explained by the structure of their interphase. Therefore, these nanoscale interphase regions need to be precisely characterized; however, the existing high resolution experimental methods have not been reliably adapted to this purpose. Electrostatic force microscopy (EFM) represents a promising technique to fulfill this objective, although no complete and accurate interphase study has been published to date and EFM signal interpretation is not straightforward. The aim of this work was to establish accurate EFM signal analysis methods to investigate interphases in nanodielectrics using three experimental protocols. Samples with well-known, controllable properties were designed and synthesized to electrostatically model nanodielectrics with the aim of “calibrating” the EFM technique for future interphase studies. EFM was demonstrated to be able to discriminate between alumina and silicon dioxide interphase layers of 50 and 100 nm thickness deposited over polystyrene spheres and different types of matrix materials. Consistent permittivity values were also deduced by comparison of experimental data and numerical simulations, as well as the interface state of silicone dioxide layers.

Sign in / Sign up

Export Citation Format

Share Document