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Articoli di riviste sul tema "Spatial scattering"

Autore: Grafiati

Pubblicato: 9 novembre 2024

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1

Li, Qingqing, Kyeong Jin Kim, Shengzhen Ruan, Lei Yuan, Ling Yang e Jiliang Zhang. "Polarized Spatial Scattering Modulation". IEEE Communications Letters 23, n. 12 (dicembre 2019): 2252–56. http://dx.doi.org/10.1109/lcomm.2019.2943864.

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2

Li, Cai, Wenxi Cao e Yuezhong Yang. "Optical scattering property: spatial and angle variability in daya bay". Chinese Optics Letters 10, S2 (2012): S20101. http://dx.doi.org/10.3788/col201210.s20101.

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3

Jannson, Joanna, Emil Wolf e Tomasz Jannson. "Spatial coherence discrimination in scattering". Optics Letters 13, n. 12 (1 dicembre 1988): 1060. http://dx.doi.org/10.1364/ol.13.001060.

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4

Eriksson, Ronja, Per Gren, Mikael Sjödahl e Kerstin Ramser. "Investigation of the Spatial Generation of Stimulated Raman Scattering Using Computer Simulation and Experimentation". Applied Spectroscopy 76, n. 11 (24 ottobre 2022): 1307–16. http://dx.doi.org/10.1177/00037028221123593.

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Stimulated Raman scattering is a phenomenon with potential use in providing real-time molecular information in three-dimensions (3D) of a sample using imaging. For precise imaging, the knowledge about the spatial generation of stimulated Raman scattering is essential. To investigate the spatial behavior in an idealized case, computer simulations and experiments were performed. For the computer simulations, diffraction theory was used for the beam propagation complemented with nonlinear phase modulation describing the interaction between the light and matter. For the experiments, a volume of ethanol was illuminated by an expanded light beam and a plane inside the volume was imaged in transmission. For generating stimulated Raman scattering, a pump beam was focused into this volume and led to a beam dump after passing the volume. The pulse duration of the two beams were 6 ns and the pump beam energy ranged from 1 to 27 mJ. The effect of increasing pump power on the spatial distribution of the Raman gain and the spatial growth of the signal at different interaction lengths between the beam and the sample was investigated. The spatial width of the region where the stimulated Raman scattering signal was generated for experiments and simulation was 0.21 and 0.09 mm, respectively. The experimental and simulation results showed that most of the stimulated Raman scattering is generated close to the pump beam focus and the maximum peak of the Stokes intensity spatially comes shortly after the peak of the pump intensity.

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5

Shinohara, Yuya, e Yoshiyuki Amemiya. "Effect of finite spatial coherence length on small-angle scattering". Journal of Applied Crystallography 48, n. 6 (13 ottobre 2015): 1660–64. http://dx.doi.org/10.1107/s160057671501715x.

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This study shows that forward scattering at the origin of reciprocal space contributes to the scattering intensity profiles of ultra-small-angle scattering. The forward scattering corresponds to a Fourier transform of the X-ray coherent volume on a sample. This contribution is usually ignored in the study of small-angle scattering, while it is fully considered in the fields of X-ray imaging, such as coherent X-ray diffraction imaging and X-ray ptychography. This effect is explicitly illustrated in the context of small-angle scattering, and the effect of a finite spatial coherence length on small-angle scattering is discussed.

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6

Bian, Yaoxing, Hongyu Yuan, Junying Zhao, Dahe Liu, Wenping Gong e Zhaona Wang. "External Electric Field Tailored Spatial Coherence of Random Lasing". Crystals 12, n. 8 (18 agosto 2022): 1160. http://dx.doi.org/10.3390/cryst12081160.

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In this study, spatial coherence tunable random lasing is proposed by designing a random laser with separate coupling configuration between the gain medium and the scattering part. By using the polymer dispersion liquid crystal (PDLC) film with tunable scattering coefficient for supplying random scattering feedback and output modification, red, green and blue random lasers are obtained. By applying or removing electric field to manipulate the scattering intensity of the PDLC film, intensity and spatial coherence of these random lasing are then switched between the high or low state. This work demonstrates that controlling the external scattering intensity is an effective method to manipulate the spatial coherence of random lasing.

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7

Pierrat, Romain, Rachid Elaloufi, Jean-Jacques Greffet e Rémi Carminati. "Spatial coherence in strongly scattering media". Journal of the Optical Society of America A 22, n. 11 (1 novembre 2005): 2329. http://dx.doi.org/10.1364/josaa.22.002329.

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8

Andreev, Anatolii V., Yu A. Il'inskiĭ e A. S. Mkoyan. "Spatial evolution of cooperative Raman scattering". Soviet Journal of Quantum Electronics 19, n. 4 (30 aprile 1989): 488–90. http://dx.doi.org/10.1070/qe1989v019n04abeh007901.

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9

DONG, GUANGJIONG. "SPATIAL TUNING OF BOSE-EINSTEIN CONDENSATIONS". International Journal of Modern Physics B 21, n. 23n24 (30 settembre 2007): 4265–70. http://dx.doi.org/10.1142/s0217979207045505.

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We briefly review our recent work on spatial tuning of Bose-Einstein condensation (BEC). We first study spatially periodic tuning of the s-wave scattering length for controlling the propagation of a BEC matter wave, and find matter wave limiting processing and bistability. Second, we show that a stable BEC with natural attractive interaction could be formed by tuning the s -wave scattering length with a Gaussian optical field, but the condensed atom number should be less than a critical value. Further, we apply Thomas-Fermi approximation to obtain a formula for this critical value.

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10

Wang, Liang, Gaokun Yu, Minshuai Liang, Yun Ren e Linhui Peng. "Experimental Measurement of Forward Scattering from Very Rough Sand Ripples in a Water Tank". Remote Sensing 14, n. 16 (9 agosto 2022): 3865. http://dx.doi.org/10.3390/rs14163865.

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High order Bragg scattering from sand ripples is investigated by a tank experiment, where the artificially produced sand ripples have a spatial period of 0.2 m and ripple height of 5 cm. Bragg scattering has been measured at three frequencies 22 kHz, 24.57 kHz, and 27 kHz and three incident grazing angles 20∘, 30∘, 40∘ by a method based on the conventional beamforming using two horizontal receiving arrays. It is illustrated that high order Bragg scatterings can be observed, and the corresponding scattered grazing angles agree with the theoretical prediction. Owing to the ripple height being on the order of wavelength, it is found that the distribution of forward scattering amplitude is different from the distribution for sand ripples of small height, i.e., the diffuseness of scattering amplitude is increased with the ripple height.

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11

Ma, Jiaying, e Ying-Sing Li. "Optical-Fiber Raman Probe with Low Background Interference by Spatial Optimization". Applied Spectroscopy 48, n. 12 (dicembre 1994): 1529–31. http://dx.doi.org/10.1366/0003702944027831.

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A Raman probe was set up with optical fibers and a graded refractive index (GRIN) lens. It was found that the Raman background arising from optical fiber was spatially dependent, while normal Raman (NR) scattering, surface-enhanced Raman scattering (SERS), and surface-enhanced resonance Raman scattering (SERRS) were spatially independent. Spatial optimization was carried out to minimize the background interference of the optical fiber Raman probe with the use of benzoic acid as a test sample. The best configuration of the probe could also be applied to both SERS and SERRS. SER spectra of p-nitrophenol (1.0 × 10−3 M) and SERR spectra of methyl red (1.0 × 10−6 M) were obtained with the use of this probe to check its performance.

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12

Batson, P. E., e R. D. Leapman. "Spatial resolution in electron energy loss scattering". Proceedings, annual meeting, Electron Microscopy Society of America 49 (agosto 1991): 474–75. http://dx.doi.org/10.1017/s0424820100086672.

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Limits on the spatial resolution in electron energy loss scattering (EELS) can be classified in several different categories. First, we must consider probe-specimen interactions which are separate from the energy loss event. These produce spreading of the probe in the STEM case and intermixing of beams with different specimen paths in the TEM case. Second, the EELS event itself is dependent on details of the scattering physics. We identify two subcategories for describing this, based roughly on the amount of energy lost -- a) the low energy region including surface and bulk plasmons, and b) core excitations. Third, the statistical quality available for the measurement will degrade the resolution, particularly for core edges.

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13

Lavery, Andone C., Christopher Bassett e Scott Loranger. "How prevalent is acoustic scattering from oceanic microstructure?" Journal of the Acoustical Society of America 152, n. 4 (ottobre 2022): A152. http://dx.doi.org/10.1121/10.0015857.

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Any oceanic environment with spatial gradients in sound speed and density can result in acoustic scattering hot spots. These acoustic hotspots can be rapidly evolving and vary in their spatial heterogeneity. Here, we review acoustic scattering models for turbulence and present data collected with a variety of split-beam and multi-beam echosounders illustrating the range of environments and spatial scales associated with scattering from physical microstructure, including shear instabilities in estuarine environments, non-linear internal waves on the continental shelf, strong interface scattering due to double-diffusion, scattering from strong gradients or interfaces, and turbulent microstructure at the New England shelf break front. The theoretical acoustic scattering formulations for different types of physical microstructure are applied to these different environments, and recommendations are made for optimal frequency bands to sample the different types of physical microstructure and the optimal measurements for inference of parameters that describe the physical microstructure. Limitations imposed on detection and quantification of scattering from the physical microstructure due to sources including suspended sediment, bubbles, and biological targets, are also discussed. [Work supported by the ONR.]

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14

Palmieri, Luca, Luca Schenato, Marco Santagiustina e Andrea Galtarossa. "Rayleigh-Based Distributed Optical Fiber Sensing". Sensors 22, n. 18 (8 settembre 2022): 6811. http://dx.doi.org/10.3390/s22186811.

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Distributed optical fiber sensing is a unique technology that offers unprecedented advantages and performance, especially in those experimental fields where requirements such as high spatial resolution, the large spatial extension of the monitored area, and the harshness of the environment limit the applicability of standard sensors. In this paper, we focus on one of the scattering mechanisms, which take place in fibers, upon which distributed sensing may rely, i.e., the Rayleigh scattering. One of the main advantages of Rayleigh scattering is its higher efficiency, which leads to higher SNR in the measurement; this enables measurements on long ranges, higher spatial resolution, and, most importantly, relatively high measurement rates. The first part of the paper describes a comprehensive theoretical model of Rayleigh scattering, accounting for both multimode propagation and double scattering. The second part reviews the main application of this class of sensors.

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15

Zhang, Xuan, Yahong Chen, Fei Wang e Yangjian Cai. "Scattering of Partially Coherent Vector Beams by a Deterministic Medium Having Parity-Time Symmetry". Photonics 9, n. 3 (27 febbraio 2022): 140. http://dx.doi.org/10.3390/photonics9030140.

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We study the scattering properties of the partially coherent vector beams with the deterministic media having the classic symmetric and parity-time (PT) symmetric scattering potential functions. The closed-form expressions for the intensity and polarization matrix of the far-zone scattered field are obtained, under first-order Born approximation, when the partially coherent vector beams are taken to be radially polarized and the deterministic media are assumed as the four-point scatterers. We demonstrate both analytically and numerically that the far-zone scattered field becomes noncentrosymmetric and the directionality appears in the scattering pattern when the scattering potential function is switched from classic symmetry to PT symmetry. We show the effect of spatial coherence of the incident partially coherent vector beam on the directionality in scattering. We find that by turning the symmetry property of the spatial coherence function of the incident beam, i.e., into PT symmetry, the directionality in the far-zone scattering can be suppressed or enhanced, depending on the joint effect from the symmetry of the scattering potential and the symmetry of the spatial coherence. Our findings may be useful in the application of dynamic control of the directionality in light scattering.

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16

Zhu, Xusheng, Lei Yuan, Kyeong Jin Kim, Qingqing Li e Jiliang Zhang. "Reconfigurable Intelligent Surface-Assisted Spatial Scattering Modulation". IEEE Communications Letters 26, n. 1 (gennaio 2022): 192–96. http://dx.doi.org/10.1109/lcomm.2021.3127020.

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17

Decker, C. D., W. B. Mori, T. Katsouleas e D. E. Hinkel. "Spatial temporal theory of Raman forward scattering". Physics of Plasmas 3, n. 4 (aprile 1996): 1360–72. http://dx.doi.org/10.1063/1.871728.

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18

Inman, C. M., e D. J. Lewis. "Characterising aerosol particles using spatial light scattering." Journal of Aerosol Science 29 (settembre 1998): S407—S408. http://dx.doi.org/10.1016/s0021-8502(98)00576-x.

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19

Lobanov, S. A., e V. G. Bespalov. "Spatial coherence of transient stimulated Raman scattering". Optics Communications 239, n. 1-3 (settembre 2004): 7–13. http://dx.doi.org/10.1016/j.optcom.2004.05.025.

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20

Wang, Yangyundou, Hugo F. Schouten e Taco D. Visser. "Tunable, anomalous Mie scattering using spatial coherence". Optics Letters 40, n. 20 (14 ottobre 2015): 4779. http://dx.doi.org/10.1364/ol.40.004779.

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21

Totir, Felix, e Emanuel Radoi. "Superresolution algorithms for spatial extended scattering centers". Digital Signal Processing 19, n. 5 (settembre 2009): 780–92. http://dx.doi.org/10.1016/j.dsp.2009.04.002.

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22

Lavery, Andone C., Christopher Bassett e Scott Loranger. "How prevalent is acoustic scattering from physical microstructure?" Journal of the Acoustical Society of America 151, n. 4 (aprile 2022): A148—A149. http://dx.doi.org/10.1121/10.0010930.

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Abstract (sommario):

Any oceanic environment with spatial gradients in sound speed and density can result in acoustic scattering hot spots. These acoustic hotspots can be rapidly evolving and vary in their spatial heterogeneity. Here, we present data collected with a variety of split-beam and multi-beam echosounders illustrating the broad array of environments and spatial scales associated with scattering from physical microstructure, including shear instabilities in estuarine environments, non-linear internal waves on the continental shelf, strong interface scattering due to double-diffusion, scattering from strong gradients, or interfaces, and turbulent microstructure at the new England Shelf Break Front. The theoretical acoustic scattering formulations for different types of physical microstructure are applied to these different environments, and recommendations are made for optimal frequency bands to sample the different types of physical microstructure and the optimal measurements for inference of parameters that describe the physical microstructure. The impact of other scattering sources, such as suspended sediments, bubbles, and biological targets, on successful acoustic sampling of physical microstructure is also discussed. [This work was supported by the ONR.]

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23

Xiong, Weizhi, e Chao Peng. "Proton Electric Charge Radius from Lepton Scattering". Universe 9, n. 4 (12 aprile 2023): 182. http://dx.doi.org/10.3390/universe9040182.

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A proton is a bound state of a strong interaction, governed by Quantum Chromodynamics (QCD). The electric charge radius of a proton, denoted by rEp, characterizes the spatial distribution of its electric charge carried by the quarks. It is an important input for bound-state Quantum Electrodynamic (QED) calculations of the hydrogen atomic energy levels. However, physicists have been puzzled by the large discrepancy between rEp measurements from muonic hydrogen spectroscopy and those from ep elastic scattering and ordinary hydrogen spectroscopy for over a decade. Tremendous efforts, both theoretical and experimental, have been dedicated to providing various insights into this puzzle, but certain issues still remain unresolved, particularly in the field of lepton scatterings. This review will focus on lepton-scattering measurements of rEp, recent theoretical and experimental developments in this field, as well as future experiments using this technique.

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Cicerone, Marcus T., e Tak W. Kee. "Broadband CARS Microscopy". Microscopy Today 12, n. 6 (novembre 2004): 38–41. http://dx.doi.org/10.1017/s1551929500065974.

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A major challenge in optical microscopy is to develop techniques with high spatial resolution, sensitivity, and chemical specificity. The latter, chemical specificity, is typically achieved through some form of labeling, which has potential to alter the nature of the sample under investigation. Raman or infrared (IR) microscopy can be utilized to image samples in their natural form using molecular vibrations as a contrast mechanism. IR microscopy suffers from spatial resolution issues, and spontaneous Raman microscopy suffers from low scattering cross-sections, so that high laser power is often required, introducing the possibility of sample photo-damage. Scattering cross-sections for Coherent Anti-Stokes Raman Scattering (CARS) are typically several orders of magnitude greater than those of spontaneous Raman Scattering. This, in addition to the high spatial resolution inherent in nonlinear optical microscopy, has led CARS microscopy to begin emerging as a powerful, noninvasive technique for biological and material imaging.

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25

Zeuner, F., A. Feller, F. A. Iglesias e S. K. Solanki. "Detection of spatially structured scattering polarization of Sr I 4607.3 Å with the Fast Solar Polarimeter". Astronomy & Astrophysics 619 (novembre 2018): A179. http://dx.doi.org/10.1051/0004-6361/201833241.

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Context. Scattering polarization in the Sr I 4607.3 Å line observed with high resolution is an important diagnostic of the Sun’s atmosphere and magnetism at small spatial scales. Investigating the scattering polarization altered by the Hanle effect is key to constraining the role of small-scale magnetic activity in solar atmospheric activity and energy balance. At present, spatially resolved observations of this diagnostic are rare and have not been reported as close to the disk center as for μ = 0.6. Aims. Our aim is to measure the scattering polarization in the Sr I line at μ = 0.6 and to identify the spatial fluctuations with a statistical approach. Methods. Using the Fast Solar Polarimeter (FSP) mounted on the TESOS filtergraph at the German Vacuum Tower Telescope (VTT) in Tenerife, Spain, we measured both the spatially resolved full Stokes parameters of the Sr I line at μ = 0.6 and the center-to-limb variation of the spatially averaged Stokes parameters. Results. We find that the center-to-limb variation of the scattering polarization in the Sr I line measured with FSP is consistent with previous measurements. A statistical analysis of Stokes Q/I (i.e., the linear polarization component parallel to the solar limb), sampled with 0.16″ pixel−1 in the line core of Sr I reveals that the signal strength is inversely correlated with the intensity in the continuum. We find stronger linear polarimetric signals corresponding to dark areas in the Stokes I continuum image (intergranular lanes). In contrast, independent measurements at μ = 0.3 show a positive correlation of Q/I with respect to the continuum intensity. We estimate that the subregion diameter responsible for the excess Q/I signal is on the order of 0.5″–1″. Conclusions. The presented observations and the statistical analysis of Q/I signals at μ = 0.6 complement reported scattering polarization observations as well as simulations. The FSP has proven to be a suitable instrument to measure spatially resolved scattering polarization signals. In the future, a systematic center-to-limb series of observations with subgranular spatial resolution and increased polarimetric sensitivity (<10−3) compared to that in the present study is needed in order to investigate the change in trend with μ that the comparison of our results with the literature suggests.

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Holoubek, Jaroslav, e Josef Baldrian. "Speckle patterns in small angle light scattering: The spatial autocorrelation function". Collection of Czechoslovak Chemical Communications 50, n. 12 (1985): 2873–83. http://dx.doi.org/10.1135/cccc19852873.

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The study deals with the determination of the spatial autocorrelation function of speckle patterns caused by the small-angle light scattering from polymer films. The autocorrelation function determines the shape, size and anisometry of the speckle. The effect of the inner structure and orientation of samples (polypropylene foil, poly(decamethylene terephthalate) and a sample of polypropylene filaments) is discussed; it is shown that under the usual experimental conditions the spatial autocorrelation function of speckle patterns can be determined on the basis of the van Cittert-Zernike theorem of the classical coherence theory. The good agreement between the theoretical and experimental dependences of anisometry, the angular dependence of speckle size and the dependence of speckle size on the sample thickness confirm the suitability of a uniform description based on the classical theory of coherence. From the standpoint of the theory of speckle effect, the results presented in this study allow us to infer that in the light scattering from polymer films under usual conditions the assumptions of the application of the central limit theorem are fulfilled: in the scattering volume there is a sufficient number of scattering units, and path fluctuations due to the scattering foil exceed the wavelength of light.

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Nedanovska, E., G. Nersisyan, C. L. S. Lewis e D. Riley. "Investigation of magnesium laser ablated plumes with Thomson scattering". Laser and Particle Beams 30, n. 2 (9 marzo 2012): 259–66. http://dx.doi.org/10.1017/s0263034612000018.

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AbstractOptical Thomson scattering has been implemented as a diagnostic of laser ablated plumes generated with second harmonic Nd:YAG laser radiation at 532 nm. Thomson scattering data with both spatial and temporal resolution has been collected, giving both electron density, and temperature distributions within the plume as a function of time. Although the spatial profiles do not match very well for simple models assuming either isothermal or isentropic expansion, consideration of the measured ablated mass indicates an isothermal expansion fits better than an isentropic expansion and indeed, at late time, the spatial profile of temperature is almost consistent with an isothermal approximation.

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Zhao, Ye, Peng-Ju Yang, Xin-Cheng Ren e Xiao-Min Zhu. "Rapid Simulation of Temporal-Spatial Correlated 3D Sea Clutter". International Journal of Antennas and Propagation 2019 (24 dicembre 2019): 1–9. http://dx.doi.org/10.1155/2019/9705406.

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Due to the difficulties in actual measurement of sea clutter and uncertainties of experimental data, the electromagnetic (EM) scattering model becomes a better alternative means to acquire the sea clutter. However, the EM scattering model still faces the problems of huge memory consumption and low-computational efficiency when dealing with the large size of sea surface or the long time case. Thus, this paper presents a statistical model to simulate the temporal-spatial correlated three-dimensional (3D) sea clutter, which is based on the statistical properties obtained from the EM scattering model, such as probability density function and correlation function. The comparisons show that the texture feature, autocorrelation function, and PDF of the sea clutter simulated by the statistical model have a good agreement with the results given by the EM model. Furthermore, the statistical model is with high efficiency and can be used to simulate the large scene or long time temporal-spatial correlated 3D sea clutter.

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Kasumova R. J., Kerimli N. V. e Safarova G. A. "Phase effects at stimulated Brillouin scattering". Optics and Spectroscopy 131, n. 1 (2023): 41. http://dx.doi.org/10.21883/eos.2023.01.55515.3165-22.

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In the study of stimulated Brillouin scattering (SBS) in the constant intensity approximation, the spatial behavior of the intensity of the Stokes scattering wave in a medium was investigated. It was found that as a result of nonlinear interaction of waves, the period of spatial beats changes. The intensity of the Stokes scattering component is considered as a function of the phase mismatch, pump and acoustic wave intensities. It is found that the efficiency of the scattering of the backward Stokes wave is affected by the total length of the nonlinear medium. According to the analytical expressions obtained in this work, the choice of the optimal parameters of the problem makes it possible to implement the regime of efficient generation of the Stokes scattering component in SBS. The process of generation and amplification of the Stokes scattering component is compared with experiment. By varying the pump intensity, one can control and manipulate the intensity of the output radiation of the Stokes component. Keywords: SBS, backward Stokes scattering wave, constant intensity approximation.

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Hoogerheide, David P., Frank Heinrich, Brian B. Maranville e Charles F. Majkrzak. "Accurate background correction in neutron reflectometry studies of soft condensed matter films in contact with fluid reservoirs". Journal of Applied Crystallography 53, n. 1 (1 febbraio 2020): 15–26. http://dx.doi.org/10.1107/s160057671901481x.

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Neutron reflectometry (NR) is a powerful method for looking at the structures of multilayered thin films, including biomolecules on surfaces, particularly proteins at lipid interfaces. The spatial resolution of the film structure obtained through an NR experiment is limited by the maximum wavevector transfer at which the reflectivity can be measured. This maximum is in turn determined primarily by the scattering background, e.g. from incoherent scattering from a liquid reservoir or inelastic scattering from cell materials. Thus, reduction of scattering background is an important part of improving the spatial resolution attainable in NR measurements. Here, the background field generated by scattering from a thin liquid reservoir on a monochromatic reflectometer is measured and calculated. It is shown that background subtraction utilizing the entire background field improves data modeling and reduces experimental uncertainties associated with localized background subtraction.

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Heberle, Frederick A., Vinicius N. P. Anghel e John Katsaras. "Scattering from phase-separated vesicles. I. An analytical form factor for multiple static domains". Journal of Applied Crystallography 48, n. 5 (18 agosto 2015): 1391–404. http://dx.doi.org/10.1107/s160057671501362x.

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This is the first in a series of papers considering elastic scattering from laterally heterogeneous lipid vesicles containing multiple domains. Unique among biophysical tools, small-angle neutron scattering can in principle give detailed information about the size, shape and spatial arrangement of domains. A general theory for scattering from laterally heterogeneous vesicles is presented, and the analytical form factor for static domains with arbitrary spatial configuration is derived, including a simplification for uniformly sized round domains. The validity of the model, including series truncation effects, is assessed by comparison with simulated data obtained from a Monte Carlo method. Several aspects of the analytical solution for scattering intensity are discussed in the context of small-angle neutron scattering data, including the effect of varying domain size and number, as well as solvent contrast. The analysis indicates that effects of domain formation are most pronounced when the vesicle's average scattering length density matches that of the surrounding solvent.

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Касумова, Р. Дж., Н. В. Керимли e Г. А. Сафарова. "Фазовые эффекты при вынужденном рассеянии Мандельштама-Бриллюэна". Оптика и спектроскопия 131, n. 1 (2023): 43. http://dx.doi.org/10.21883/os.2023.01.54536.3165-22.

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Abstract (sommario):

In the study of stimulated Brillouin scattering (SBS) in the constant intensity approximation, the spatial behavior of the intensity of the Stokes scattering wave in a medium was investigated. It was found that as a result of nonlinear interaction of waves, the period of spatial beats changes. The intensity of the Stokes scattering component is considered as a function of the phase mismatch, pump and acoustic wave intensities. It is found that the efficiency of the scattering of the backward Stokes wave is affected by the total length of the nonlinear medium. According to the analytical expressions obtained in this work, the choice of the optimal parameters of the problem makes it possible to implement the regime of efficient generation of the Stokes scattering component in SBS. The process of generation and amplification of the Stokes scattering component is compared with experiment. By varying the pump intensity, one can control and manipulate the intensity of the output radiation of the Stokes component.

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Szekrényes, Dániel Péter, Szilárd Pothorszky, Dániel Zámbó e András Deák. "Detecting spatial rearrangement of individual gold nanoparticle heterodimers". Physical Chemistry Chemical Physics 21, n. 19 (2019): 10146–51. http://dx.doi.org/10.1039/c9cp01541h.

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Wadood, S. A., H. F. Schouten, D. G. Fischer, T. D. Visser e A. N. Vamivakas. "Anomalous spatial coherence changes in radiation and scattering". Optics Express 29, n. 14 (22 giugno 2021): 21300. http://dx.doi.org/10.1364/oe.428108.

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35

Leith, E. N., D. Dilworth, C. Chen, H. Chen, Y. Chen, J. Lopez e P. C. Sun. "Imaging through scattering media using spatial incoherence techniques". Optics Letters 16, n. 23 (1 dicembre 1991): 1820. http://dx.doi.org/10.1364/ol.16.001820.

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36

Kusters, J. F., Barry J. Rye e Andrew C. Walker. "Spatial weighting in laboratory incoherent light scattering experiments". Applied Optics 28, n. 4 (15 febbraio 1989): 657. http://dx.doi.org/10.1364/ao.28.000657.

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37

Ding, Yacong, Kyeong Jin Kim, Toshiaki Koike-Akino, Milutin Pajovic, Pu Wang e Philip Orlik. "Spatial Scattering Modulation for Uplink Millimeter-Wave Systems". IEEE Communications Letters 21, n. 7 (luglio 2017): 1493–96. http://dx.doi.org/10.1109/lcomm.2017.2684126.

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Ito, Makoto, Masataka Iwasaki, Reiji Otani e Masashi Tomita. "Spatial measure of reaction size in proton scattering". EPJ Web of Conferences 122 (2016): 06004. http://dx.doi.org/10.1051/epjconf/201612206004.

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39

Frassinetti, L., M. N. A. Beurskens, R. Scannell, T. H. Osborne, J. Flanagan, M. Kempenaars, M. Maslov, R. Pasqualotto e M. Walsh. "Spatial resolution of the JET Thomson scattering system". Review of Scientific Instruments 83, n. 1 (gennaio 2012): 013506. http://dx.doi.org/10.1063/1.3673467.

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Camps, Adriano. "Spatial Resolution in GNSS-R Under Coherent Scattering". IEEE Geoscience and Remote Sensing Letters 17, n. 1 (gennaio 2020): 32–36. http://dx.doi.org/10.1109/lgrs.2019.2916164.

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41

Konecky, Soren D. "Imaging scattering orientation with spatial frequency domain imaging". Journal of Biomedical Optics 16, n. 12 (1 dicembre 2011): 126001. http://dx.doi.org/10.1117/1.3657823.

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42

Hirst, E., P. H. Kaye, S. Saunders, D. W. Johnson e M. A. Pickering. "Characterising atmospheric cloud particles using spatial light scattering." Journal of Aerosol Science 29 (settembre 1998): S627—S628. http://dx.doi.org/10.1016/s0021-8502(98)00476-5.

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43

Wu, Zhensen, Daoyong Li e Yanqun Zhang. "Light Scattering and Visibility Condition of Spatial Objects". International Journal of Infrared and Millimeter Waves 25, n. 8 (agosto 2004): 1201–9. http://dx.doi.org/10.1023/b:ijim.0000042752.88208.df.

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44

Tomita, M., M. Iwasaki, R. Otani e M. Ito. "Spatial measure of reaction size in proton scattering". Journal of Physics: Conference Series 569 (8 dicembre 2014): 012022. http://dx.doi.org/10.1088/1742-6596/569/1/012022.

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45

Li, Daoyong, Hongjie Yang e Lili Zhu. "LIGHT SCATTERING AND INFRARED RADIATION OF SPATIAL OBJECTS". International Journal of Infrared and Millimeter Waves 27, n. 12 (8 maggio 2007): 1609–17. http://dx.doi.org/10.1007/s10762-006-9170-z.

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46

Warchall, Henry A. "Scattering of solitary waves in multiple spatial dimensions". Physica D: Nonlinear Phenomena 18, n. 1-3 (gennaio 1986): 315–17. http://dx.doi.org/10.1016/0167-2789(86)90194-6.

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47

Kaye, Paul H., Edwin Hirst, Richard S. Greenaway, Zbigniew Ulanowski, Evelyn Hesse, Paul J. DeMott, Clive Saunders e Paul Connolly. "Classifying atmospheric ice crystals by spatial light scattering". Optics Letters 33, n. 13 (30 giugno 2008): 1545. http://dx.doi.org/10.1364/ol.33.001545.

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Brower, D. L., C. X. Yu, S. J. Zhao, W. A. Peebles, N. C. Luhmann, X. Z. Yang, P. M. Schoch e R. L. Hickok. "Spatial resolution of FIR scattering measurements on TEXT". Review of Scientific Instruments 61, n. 10 (ottobre 1990): 3019–21. http://dx.doi.org/10.1063/1.1141713.

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Eilhard, J., A. Zirkel, W. Tschöp, O. Hahn, K. Kremer, O. Schärpf, D. Richter e U. Buchenau. "Spatial correlations in polycarbonates: Neutron scattering and simulation". Journal of Chemical Physics 110, n. 3 (15 gennaio 1999): 1819–30. http://dx.doi.org/10.1063/1.477889.

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Zarubin, Alexander M. "Determination of scattering structures from spatial coherence measurements". Ultramicroscopy 62, n. 4 (marzo 1996): 229–36. http://dx.doi.org/10.1016/0304-3991(95)00150-6.

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