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In geology the simulation of the sedimention process deposition is very used on different kind of studies. However a great problem is to get the information without destroy the architecture of the deposited material (since now named testimonial). Usually they do slice the real sample and they take pictures of it. However this technique is too aggressive (invasive) and usually cause damage to the testimonial...
ICx Radiation has developed a novel method to determine the direction of radiation with a device containing only two detectors by comparing and analyzing the paired-energy distributions of coincident events. The method does not require complex image reconstruction but rather extracts the directionality from the means and skewness of the two coincidence spectra. All energy data contribute to the energy...
Modeling of gamma spectra is required in various fields. The growth of usage of spectrometric border monitoring methods to combat illicit trafficking of nuclear and other radioactive materials enhances the need for such techniques. With the development of the Gamma Spectrum Generator within the Nucleonica web-portal (www.nucleonica.net) a new ansatz is made, which allows authorized experts to perform...
The calorimeter of KLOE at INFN-LNF is a high-sampling, lead/scintillating-fiber calorimeter primarily designed to detect photons with very high efficiency. During a KLOE study of kaon interactions in the apparatus walls, hints of a high efficiency for low energy neutrons (<; 20MeV) were observed and confirmed by the experiment simulation. A more systematic study, involving exposing the prototype...
We discuss tunability and nonlinear properties of metamaterials operating at microwave and optical frequencies. We also study the fundamental nonlinear effects in metal-dielectric waveguides supporting surface plasmon polaritons, and discuss nanofocusing of a plasmon beam and soliton formation in a tapered waveguide in the presence of losses.
Advancements in real-time surgical simulation techniques have provided the ability to utilize more complex nonlinear constitutive models for biological tissues which result in increased haptic and graphic accuracy. When developing such a model, verification is necessary to determine the accuracy of the force response as well as the magnitude of tissue deformation for tool-tissue interactions. In this...
With the emergence of high resolution scanning and printing devices, copyright protection for printed materials becomes an important problem in digital image research. After analyzing geometric and pixel value distortion of an image scanned from legal and pirated printed materials respectively, we propose in this paper a copyright protection method based on digital image watermarking. Our algorithm...
Using the numerical code Fishbone, developed to study the parasitic oscillations in gyrotron beam tunnels, a parametric study is performed on the effect of the dielectric material as well as of the slot geometry on the growth rate of the excited parasitic modes.
Antennas are very important in communication wireless systems because of the main part, the sending and reception quality of the information depending on them. Dimensions and geometries of antennas depend on kind system (operation frequency), as well as the manufacturing material. In this research, we present an introduction about antennas design for GPS (f0=1.57542 GHz), considering different geometries...
Although spectral images contain large amount of information, compared with color images, the image acquisition is affected by several factors such as shading and specular highlight. Many researchers have introduced color invariant and spectral invariant representations for these factors using the standard dichromatic reflection model of inhomogeneous dielectric materials. However, these representations...
Electrodynamic field simulations in the frequency domain typically require the solution of large linear systems. During the design process it is desirable to vary specified parameters like the frequency, geometry details as well as material parameters. Initializing an individual calculation to consider all parameter changes is not efficient. Model Order Reduction (MOR) techniques offer an approach...
In this paper, we study the problem of decomposing spectra in hyperspectral data into the sum of pure spectra, or endmembers. We propose to jointly extract the endmembers and estimate the corresponding fractions, or abundances. For this purpose, we show that these abundances can be easily computed using volume of simplices, from the same information used in the classical N-Findr algorithm. This results...
Imaging polarimetry has emerged as a powerful tool for application in the field of remote sensing. In this paper, we present a novel technique for estimating the surface normal angle of each of the individual facets of a target object using passive polarimetric data. The passive polarimetric imaging system described here uses multiple measurements of the output Stokes vectors along with the reflection...
We have developed a new biomimetic actuator for micro robots using inchworm-like segmented solenoids. The electromagnetic impulse-driven micro actuator is composed of 4 solenoids, guide and stopper. We have analyzed the locomotive motion theoretically and numerically, resulted from the sequential impulses by the segmented solenoids. Based on the theoretical results, we have optimized the design parameters...
An analytical description of the static characterization of a smart beam with surface-bonded piezoelectric transducers is developed in this paper. The uniform elastic beam is actuated by piezoelectric patches and modeled as an Euler-Bernoulli beam. The static analysis of the intelligent beam is then given in detail based on a transfer matrix method. Furthermore, the actuation mechanism of the piezoelectric...
We introduce a new spectral mixture analysis approach. Unlike most available approaches that only use the spectral information, this approach uses the spectral and spatial information available in the hyperspectral data. Moreover, it does not assume a global convex geometry model that encompasses all the data but rather multiple local convex models. Both the multiple model boundaries and the model's...
The viability of inter-strata low pitch vertical interconnection technologies is mandatory for 3D applications. In order to increase the connection complexity and to reach a 10µm or even smaller interconnection pitch, a new room-temperature insertion technology has been proposed and developed using micro tubes as inserts [1]. In the present work, we study the load required to obtain a full and efficient...
This paper describes a novel approach for the segmentation of complex images to determine candidates for accurate material-type classification. The proposed approach identifies classification candidates based on image quality calculated from viewing distance and angle information. The required viewing distance and angle information is extracted from 3D fused images constructed from laser range data...
The static response of an intelligent beam with surface-bonded piezoelectric patches is investigated in this paper. Timoshenko beam theory is employed to study the properties of beam-like structures bonded with multiple pairs of PZT patches. Here, only one-dimensional axial deformation of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches...
One of the most valuable plasma characteristics that can be obtained from a Langmuir probe is the Electron Energy Distribution Function (EEDF). Due to the integral relationship between the probe VI characteristic and the EEDF, it is also one of the most challenging aspects of Langmuir probe analysis.
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