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Artykuły w czasopismach na temat „Scattering coefficient”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Zhang, Q. Q., X. J. Wu, C. Wang, et al. "Scattering Coefficients of Mice Organs Categorized Pathologically by Spectral Domain Optical Coherence Tomography." BioMed Research International 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/471082.

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Differences in tissue density cause a variety of scattering coefficients. To quantify optical coherence tomography (OCT) images for diagnosis, the tissue's scattering coefficient is estimated by curve fitting the OCT signals to a confocal single backscattering mode. The results from a group of 30 mice show that the scattering coefficients of bone, skin, liver, brain, testis, and spleen can be categorized into three groups: a scattering coefficient between 1.947 and 2.134 mm−1: bone and skin; a scattering coefficient between 1.303 and 1.461 mm−1: liver and brain; a scattering coefficient betwee

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2

KÖRKKÖ, MIKA, OSSI LAITINEN, ANTTI HAAPALA, ARI ÄMMÄLÄ, and JOUKO NIINIMÄKI. "Scattering properties of recycled pulp at the near infrared region and its effect on the determination of residual ink." June 2011 10, no. 6 (2011): 17–22. http://dx.doi.org/10.32964/tj10.6.17.

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Residual ink in recycled pulp can be determined from a wide variety of pads and sheets using either a constant or measured near infrared (NIR) scattering coefficient. The method is usually chosen on the basis of the opaqueness of the prepared test media. Although both methods are regularly used, it is unclear whether NIR scattering properties of pulp vary due to changing proportions of fibers and fines and whether the changing NIR scattering coefficient affects the residual ink values. We investigated the effect of varying scattering coefficient on residual ink results obtained with unknown (c

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3

Chung, Won Young, Sun Young Kim, and Chang Ho Kang. "Image Dehazing Using LiDAR Generated Grayscale Depth Prior." Sensors 22, no. 3 (2022): 1199. http://dx.doi.org/10.3390/s22031199.

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In this paper, the dehazing algorithm is proposed using a one-channel grayscale depth image generated from a LiDAR point cloud 2D projection image. In depth image-based dehazing, the estimation of the scattering coefficient is the most important. Since scattering coefficients are used to estimate the transmission image for dehazing, the optimal coefficients for effective dehazing must be obtained depending on the level of haze generation. Thus, we estimated the optimal scattering coefficient for 100 synthetic haze images and represented the distribution between the optimal scattering coefficie

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4

Sato, Haruo. "Isotropic scattering coefficient of the solid earth." Geophysical Journal International 218, no. 3 (2019): 2079–88. http://dx.doi.org/10.1093/gji/ggz266.

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SUMMARY The isotropic scattering model is a simple mathematical model of the radiative transfer theory (RTT) for the propagation of the wave energy density in random media. There have been many measurements of the isotropic scattering coefficient of the heterogeneous solid earth medium, where the target region varies from the lower and upper mantle, the crust, sediments, volcanoes, mines, rock samples and also the crust and the upper mantle of the moon. Reported isotropic scattering coefficients increase according to some power of frequency with some scatter. We know that the RTT is well appro

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5

Esmonde-White, Francis W. L., and David H. Burns. "A Portable Multi-Wavelength near Infrared Photon Time-of-flight Instrument for Measuring Light Scattering." Journal of Near Infrared Spectroscopy 17, no. 4 (2009): 167–76. http://dx.doi.org/10.1255/jnirs.847.

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Measured light scattering properties can be used to improve quantitative spectroscopic analyses of turbid samples. Instruments currently used to measure scattering coefficients are not optimised for portability. A hand-held, dual-wavelength instrument was developed and validated for rapid measurement of reduced scattering coefficients in tandem with near infrared spectra. Tissue simulating phantoms composed of Intralipid and dye were used to model clinically relevant optical properties. Time-dependent intensity profiles of diffusely reflected near infrared pulsed laser light were collected fro

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6

Blaney, Giles, Angelo Sassaroli, and Sergio Fantini. "Method for Measuring Absolute Optical Properties of Turbid Samples in a Standard Cuvette." Applied Sciences 12, no. 21 (2022): 10903. http://dx.doi.org/10.3390/app122110903.

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Many applications seek to measure a sample’s absorption coefficient spectrum to retrieve the chemical makeup. Many real-world samples are optically turbid, causing scattering confounds which many commercial spectrometers cannot address. R1C1Using diffusion theory and considering absorption and reduced scattering coefficients on the order of 0.01/mm and 1/mm, respectively, we develop a method which utilizes frequency-domain to measure absolute optical properties of turbid samples in a standard cuvette ( 45x10x10mm). Inspired by the self-calibrating method, which removes instrumental confounds,

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7

Chen, Zezong, Jian Li, Chen Zhao, Fan Ding, and Xi Chen. "The Scattering Coefficient for Shore-to-Air Bistatic High Frequency (HF) Radar Configurations as Applied to Ocean Observations." Remote Sensing 11, no. 24 (2019): 2978. http://dx.doi.org/10.3390/rs11242978.

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To extend the scope of high frequency (HF) radio oceanography, a new HF radar model, named shore-to-air bistatic HF radar, has been proposed for ocean observations. To explore this model, the first-order scattering coefficient and the second-order electromagnetic scattering coefficient for shore-to-air bistatic HF radar are derived using the perturbation method. In conjunction with the contribution of the hydrodynamic component, the second-order scattering coefficient is derived. Based on the derived scattering coefficients, we analyzed the simulated echo Doppler spectra for various scattering

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8

Ye, Shubing, Guobin Feng, Zhejun Feng, Zhenbao Wang, Dahui Wang, and Changqing Cao. "Properties of Scattering Fields from Gaussian Beam Incident on Rough Cylinders." Photonics 10, no. 6 (2023): 699. http://dx.doi.org/10.3390/photonics10060699.

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At present, most researchers focus on plane wave incident on targets, but in practical applications, most of the beams are Gaussian beam. We study the scattering fields of Gaussian beam incident on rough cylinders. Coherent and incoherent scattering coefficients are obtained based on the angular spectrum expansion and physical optics approximation, and the effects of cylinder roughness, beam radius, cylinder radius and angle of incidence on scattering coefficients are analyzed. The results show that, for a constant wavelength, when the root mean square height is greater than or equal to 1/5 of

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9

Dolin, L. S. "On the Influence of Spatial Fluctuations of the Water Inherent Optical Properties on the Energy of a Lidar Echo Signal Coming from a Water." Fundamental and Applied Hydrophysics 16, no. 1 (2023): 35–47. http://dx.doi.org/10.59887/fpg/1gan-g7mu-dk9p.

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Theoretical models of the statistical characteristics of the lidar echo signal have been developed to interpret the results of optical sounding of heavily eutrophicated water bodies. Formulas are obtained for calculating the statistically average value and coefficient of variation of the energy of the elastic backscattering signal coming from the near-surface layer of water with randomly inhomogeneous absorption and scattering coefficients. Examples of the dependence of the indicated signal characteristics on the coefficients of variation of the optical characteristics of water are given. It h

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10

Zhu, Xiangdong, Guoqiang Xu, Jian Kang, Xiaoyan Xue, and Yu Hao. "Influence of Surface Scattering on Auditorium Acoustic Parameters." Buildings 14, no. 6 (2024): 1882. http://dx.doi.org/10.3390/buildings14061882.

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Surface scattering greatly impacts and improves the acoustic quality of an auditorium, affecting properties such as the reverberation time, early decay time, definition, and sound strength. However, this aspect has not been sufficiently investigated to date. In this study, six completed auditoriums are taken as research samples and computer simulations are performed to analyze the variation patterns in the acoustic-quality parameters as functions of increments in the surface scattering coefficients. The results show that the reverberation time and early decay time change marginally (<5%) wh

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11

Heimes, Anne, and Michael Vorlaender. "A new approach for auralization of scattering in urban spaces." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A183. http://dx.doi.org/10.1121/10.0018594.

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Absorption and scattering coefficients of surfaces are crucial for acoustic propagation simulations. The scattering coefficient according to ISO 17497-1, however, is the most uncertain standard metric applied in geometrical acoustics. In outdoor sound propagation simulation, the amount of scattered energy is crucial for the sound immission at the receiver. Standard random-incidence scattering coefficients are in use but with uncertain results. In contrast, specific reflection patterns are neither available nor implemented in simulation algorithms. In this paper, the scattering coefficient conc

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12

Wu, Zheng-Xue, Chao-Yun Long, Jing Wu, Zheng-Wen Long, and Ting Xu. "Scattering in graphene quantum dots under generalized uncertainty principle." International Journal of Modern Physics A 34, no. 31 (2019): 1950212. http://dx.doi.org/10.1142/s0217751x19502129.

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In this article, the Dirac electron scattering problem on circular barrier of radius [Formula: see text] is studied under the generalized uncertainty principle (GUP). The expressions of scattering coefficients, scattering cross-section and scattering efficiency of massless Dirac particle are obtained by solving the massless Dirac equation under GUP and discussed by numerical methods. It shows that the scattering coefficient, the scattering cross-section, and the scattering efficiency depend explicitly on the GUP parameter [Formula: see text]. For the scattering coefficient [Formula: see text],

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13

Khrystoslavenko, Olga, and Raimondas Grubliauskas. "Experimental Studies of the Sound Scattering Coefficient of the Diffuser in the Reverberation Chamber." Environmental and Climate Technologies 27, no. 1 (2023): 464–75. http://dx.doi.org/10.2478/rtuect-2023-0034.

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Abstract Wood charcoal is a sustainable, renewable, and environmentally friendly material with the use that the acoustic device can produce. Charcoal made of wood waste materials allows for improving indoor acoustical quality. Therefore, this objective of the article is to investigate the sound scattering coefficients of QRD with the perforation ratio of oak wood charcoal elements. Sound scattering coefficient calculated with the measurement of the reverberation time in the reverberation chamber. The calculation results of the scattering coefficient show the growth of scattering in the frequen

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14

Wang, Hai Tao, Xiang Yang Zeng, and Yan Shan Liu. "Calculation of the Scattering Coefficient of Large Scale Periodic Structure." Advanced Materials Research 889-890 (February 2014): 135–39. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.135.

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The periodic structure is common used in engineering to improve the sound diffusion in room acoustics. It usually has large dimensions and it is difficult to calculate the scattering coefficient based on its original scale. In order to represent the scattering coefficients of a large scale periodic structure by those of a smaller one, the relations of the scattering coefficients of the periodic structures with different dimensions are analyzed in this paper. At first, a BMM (Boundary Meshless Method) for calculating the scattering coefficient is derived. The scattering coefficients of the peri

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15

Vorlaender, Michael, and Stefan Feistel. "Show your scattering coefficients." Journal of the Acoustical Society of America 152, no. 4 (2022): A209. http://dx.doi.org/10.1121/10.0016032.

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Absorption and scattering coefficients of surfaces are crucial components of room-acoustic simulations. The random-incidence scattering coefficient is the most uncertain metric applied in geometrical acoustics. Databases of scattering coefficients are rare. Their impact on auditory perception in auralizations, however, is relatively well studied. Research directions in developing improved scattering metrics can focus on their relevance for auditory effects, their influence on the spatial sound energy flow, their characterization in angular decomposition, and their estimation with simple rules

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16

Leskinen, A., A. Arola, M. Komppula, et al. "Seasonal cycle and source analyses of aerosol optical properties in a semi-urban environment at Puijo station in Eastern Finland." Atmospheric Chemistry and Physics 12, no. 12 (2012): 5647–59. http://dx.doi.org/10.5194/acp-12-5647-2012.

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Abstract. We introduce a four-year (in 2006–2010) continuous data set of aerosol optical properties at Puijo in Kuopio, Finland. We study the annual and diurnal variation of the aerosol scattering and absorption coefficients, hemispheric backscattering fraction, scattering Ångström exponent, and single scattering albedo, whose median values over this period were 7.2 Mm−1 (at 550 nm), 1.0 Mm−1 (at 637 nm), 0.15, 1.93 (between 450 and 550 nm), and 0.85, respectively. The scattering coefficient peaked in the spring and autumn, being 2–4 times those in the summer and winter. An exception was the s

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17

Burger, T., J. Kuhn, R. Caps, and J. Fricke. "Quantitative Determination of the Scattering and Absorption Coefficients from Diffuse Reflectance and Transmittance Measurements: Application to Pharmaceutical Powders." Applied Spectroscopy 51, no. 3 (1997): 309–17. http://dx.doi.org/10.1366/0003702971940404.

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A measurement and data evaluation technique for the separate determination of the scattering and absorption properties of loose pharmaceutical powders is described. The equation of radiative transfer for diffuse reflectance and transmittance is analytically solved by using a three-flux approximation. Combined transmittance and reflectance measurements then allow one to derive both the scattering and the absorption coefficients. The scattering and absorption coefficients provide more information about particle size, degree of agglomeration, and chemical composition of the samples in comparison

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18

Basak, Soumen, and Parthasarathi Majumdar. "Reflection coefficient for superresonant scattering." Classical and Quantum Gravity 20, no. 13 (2003): 2929–36. http://dx.doi.org/10.1088/0264-9381/20/13/335.

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19

Ren, Yuhu, Jimo Jian, Wenjiang Tan, Jing Wang, Tao Chen, and Wei Xia. "Transition from the ballistic to the snake regime of a femtosecond laser through a turbid medium via Monte Carlo simulation." Laser Physics Letters 19, no. 5 (2022): 056002. http://dx.doi.org/10.1088/1612-202x/ac5b5c.

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Abstract We study the transition from the ballistic to the snake regime of a femtosecond laser through a turbid medium via Monte Carlo simulation. The results show that the transition depth of the ballistic to the snake regime of a femtosecond laser through a turbid medium is close to the surface of the scattering volume. The transition process depends on the scattering coefficient of the turbid medium. Unlike the decay of the intensities of the ballistic photons governed by Beer–Lambert law, the intensities of the snake photons first increase with an increase of the thickness of the turbid me

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20

Zhang, L., X. Cao, J. Bao, et al. "A case study of dust aerosol radiative properties over Lanzhou, China." Atmospheric Chemistry and Physics 10, no. 9 (2010): 4283–93. http://dx.doi.org/10.5194/acp-10-4283-2010.

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Abstract. The vertical distribution of dust aerosol and its radiative properties are analysed using the data measured by the micropulse lidar, profiling microwave radiometer, sunphotometer, particulate monitor, and nephelometer at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) during a dust storm from 27 March to 29 March 2007. The analysis shows that the dust aerosol mainly exists below 2 km in height, and the dust aerosol extinction coefficient decreases with height. The temporal evolution of aerosol optical depth (AOD) during the dust storm is characterized

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21

Zhang, L., X. Cao, J. Bao, et al. "A case study of dust aerosol radiative properties over Lanzhou, China." Atmospheric Chemistry and Physics Discussions 10, no. 2 (2010): 2889–914. http://dx.doi.org/10.5194/acpd-10-2889-2010.

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Abstract. The vertical distribution of dust aerosol and its radiative properties are analysed using the data measured by the micropulse lidar, profiling microwave radiometer, sunphotometer, particulate monitor, and nephelometer at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) during a dust storm from 27 March to 29 March 2007. The analysis shows that the dust aerosol mainly exists below 2 km in height, and the dust aerosol extinction coefficient decreases with height. The temporal evolution of aerosol optical depth (AOD) during the dust storm is characterized

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22

Wan, Xiao Xia, Zhen Liu, and Qiang Liu. "The Ray Scattering Spectral Reflectance Model for Coloring Images." Advanced Materials Research 174 (December 2010): 24–27. http://dx.doi.org/10.4028/www.scientific.net/amr.174.24.

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we proposed a model for reflectance of a medium in ink layer. And the scattering coefficient is more complicated than the refractive index and absorption coefficient due to its complicated scattering laws and multi-direction, and the multi-direction makes different scatting coefficients in different situation. The goal of the work proposed in this dissertation is to develop a new method to analysis the scattering situation using random walk. By analysis the probability of the scattering of the particle, we obtain the reflectance factors of the diffusing medium with the observation geometry. Th

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23

Haddadi, Ataollah, Guillaume Hans, Brigitte Leblon, et al. "Determination of Optical Parameters and Moisture Content of Wood with Visible–Near Infrared Spectroscopy." Journal of Near Infrared Spectroscopy 24, no. 6 (2016): 571–85. http://dx.doi.org/10.1255/jnirs.1174.

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We used the Kubelka-Munk theory equations for calculating the absorption coefficient (Kλ), the scattering coefficient ( Sλ), the transport absorption (σλa), the reduced scattering coefficient [σλs(1 – g)] and the penetration depth (δλ) from visible-near infrared reflectance spectra acquired over thin samples of quaking aspen and black spruce conditioned at three different moisture levels. The computed absorption and scattering coefficients varied from 0.1 mm−1 to 4.0 mm−1 and from 5.5 mm−1 to 10.0 mm−1, respectively. The absorption coefficients varied according to the absorption band, but the

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24

Беликов, А. В., А. М. Загорулько, С. Н. Смирнов, А. Н. Сергеев, А. А. Михайлова та А. А. Шимко. "Оптические свойства in vitro катарактальных хрусталиков глаза человека в видимом и ближнем ИК диапазонах-=SUP=-*-=/SUP=-". Журнал технической физики 126, № 5 (2019): 656. http://dx.doi.org/10.21883/os.2019.05.47667.16-19.

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Spectral dependences of absorption coefficient, scattering coefficient, anisotropy factor and reduced scattering coefficient for in vitro human eye lenses of different cataract type are investigated. The spectra of absorption coefficient and reduced scattering coefficient were obtained for the spectral range 400-2300 nm, and the spectra of scattering coefficient and scattering anisotropy factor - for the spectral range 400-1800 nm. The regions of wavelengths within which the spectra of the studied optical characteristics of the human eye lens are not statistically significantly different for s

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25

Hoitmetov, U. A., and T. G. Khasanov. "Integration of the Korteweg-de Vries equation with time-dependent coefficients in the case of moving eigenvalues of the Sturm–Liouville operator." Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika, no. 5 (May 29, 2024): 63–78. http://dx.doi.org/10.26907/0021-3446-2024-5-63-78.

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The inverse scattering method is used to integrate the Korteweg-de Vries equation with time-dependent coefficients. We derive the evolution of the scattering data of the Sturm–Liouville operator whose coefficient is a solution of the Korteweg-de Vries equation with time-dependent coefficients. An algorithm for constructing exact solutions of the Korteweg-de Vries equation with time-dependent coefficients is also proposed; we reduce it to the inverse problem of scattering theory for the Sturm–Liouville operator. Examples illustrating the stated algorithm are given.

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26

Wang, Chen, Qinqin Zhang, Xiaojing Wu, et al. "Quantitative Diagnosis of Colorectal Polyps by Spectral Domain Optical Coherence Tomography." BioMed Research International 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/570629.

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The principal aim of this study is to investigate the scattering coefficient of colorectal polyp tissues using an optical coherence tomography (OCT) technique. It combines the existing scattering coefficient model and spectral domain OCT to achieve method of early diagnosis of colorectal polyp in hospitals. Seventeen patients were studied, and a total of 1456 data points were extracted by curve-fitting the OCT signals into a confocal single-backscattering model. The results show that the mean scattering coefficient value for colorectal polyps is 1.91 mm−1(std: ±0.54 mm−1), which is between the

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27

Stocker, Sabrina, Florian Foschum, Philipp Krauter, et al. "Broadband Optical Properties of Milk." Applied Spectroscopy 71, no. 5 (2016): 951–62. http://dx.doi.org/10.1177/0003702816666289.

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Dairy products play an important role in our daily nutrition. As a turbid scattering medium with different kinds of particles and droplets, each alteration of these components changes the scattering properties of milk. The goal of this work is the determination of the amount of main scattering components, the fat droplets and the casein micelles, by understanding the light propagation in homogenized milk and in raw milk. To provide the absolute impact of these milk components, the geometrical and optical properties such as the size distribution and the refractive index (RI) of the components h

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28

Pereira, S. N., F. Wagner, and A. M. Silva. "Continuous measurements of near surface aerosols in the south-western European (Portugal) region in 2006–2008." Advances in Science and Research 3, no. 1 (2009): 1–4. http://dx.doi.org/10.5194/asr-3-1-2009.

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Abstract. Scattering and absorption coefficients near the ground were measured in Évora, Portugal, in the period of 2006 to 2008. The average scattering coefficient, at the wavelength of 550 nm, for the whole period of measurements was found to be 40.3 Mm−1 and the absorption coefficient, at the wavelength of 670 nm, 8.6 Mm−1. These values are comparable to those measured in rural or background locations and reflect the small size of the city and relatively low magnitude of anthropogenic production at the site. A marked seasonal variation was found for the absorption coefficient, with a signif

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29

Gorobets, Yu N. "Scattering coefficient of circular-aperture antenna." Telecommunications and Radio Engineering 57, no. 6-7 (2002): 7. http://dx.doi.org/10.1615/telecomradeng.v57.i6-7.40.

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Hohmann, Martin, Benjamin Lengenfelder, Daniel Muhr, et al. "Direct measurement of the scattering coefficient." Biomedical Optics Express 12, no. 1 (2020): 320. http://dx.doi.org/10.1364/boe.410248.

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Atkinson, D., and J. Geschiere. "Inverse scattering: an illicit reflection coefficient." Inverse Problems 2, no. 4 (1986): L51—L53. http://dx.doi.org/10.1088/0266-5611/2/4/003.

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Lanting, Peter J. H., Peter C. F. Borsboom, Gerard J. te Meerman, and Leo P. ten Kate. "Decreased scattering coefficient of blue sclerae." Clinical Genetics 27, no. 2 (2008): 187–90. http://dx.doi.org/10.1111/j.1399-0004.1985.tb00209.x.

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Richter, Scott J., and Robert H. Stavn. "Determining Functional Relations in Multivariate Oceanographic Systems: Model II Multiple Linear Regression." Journal of Atmospheric and Oceanic Technology 31, no. 7 (2014): 1663–72. http://dx.doi.org/10.1175/jtech-d-13-00210.1.

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Abstract A method for estimating multivariate functional relationships between sets of measured oceanographic, meteorological, and other field data is presented. Model II regression is well known for describing functional relationships between two variables. However, there is little accessible guidance for the researcher wishing to apply model II methods to a multivariate system consisting of three or more variables. This paper describes a straightforward method to extend model II regression to the case of three or more variables. The multiple model II procedure is applied to an analysis of th

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D'Errico, Raffaele, and Alain Sibille. "Single and Multiple Scattering in UWB Bicone Arrays." International Journal of Antennas and Propagation 2008 (2008): 1–12. http://dx.doi.org/10.1155/2008/129584.

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An analysis of interactions between radiators in a UWB biconical array, drawing attention to single and multiple scatterings, is carried out. The complementarity between electrical coupling and radiation scattering is argued. The point source approximation is discussed and shown to be insufficient. An approximation of radiation scattering based on angular averaging of the scattering coefficient is proposed. This approach yields a reduction of the problem complexity, which is especially interesting in UWB multiple antenna systems, because of the large bandwidth. Multiple scattering between radi

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35

GAO, WANRONG, PENG LEE, and XIANLING ZHANG. "CHARACTERIZATION OF VITILIGO BY IN VIVO SCATTERING COEFFICIENT OF HUMAN SKIN." Journal of Innovative Optical Health Sciences 04, no. 01 (2011): 67–72. http://dx.doi.org/10.1142/s1793545811001216.

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Scattering coefficients of human skin in vivo with and without vitiligo were measured with optical coherence tomography (OCT). The experimental results show that there exist significant difference between the scattering coefficient of the epidermis of in vivo human skin with and without vitiligo disease. The results may be helpful for quantitatively diagnosing or evaluating the treatment of the disease.

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Vornovskikh, Polina, Andrei Sushchenko, and Igor Prokhorov. "Reconstruction of volume scattering coefficient with considering seabottom scattering layer." Journal of the Acoustical Society of America 146, no. 4 (2019): 2929. http://dx.doi.org/10.1121/1.5137172.

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Akpootu, D. O., G. Bello, S. R. Alaiyemola, et al. "The Scattering and Absorption Coefficients of Atmospheric Soot in the Hygroscopicity of Urban Aerosols." Dutse Journal of Pure and Applied Sciences 9, no. 2b (2023): 86–97. http://dx.doi.org/10.4314/dujopas.v9i2b.10.

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Aerosols are microscopic solid or liquid particles suspended in the atmosphere that have an impact on the Earth's radiative balance. This paper modeled and investigates the effect of scattering and absorption coefficients along with their respective hygroscopicity of atmospheric soot using extracted data from Optical Properties of Aerosols and Clouds (OPAC) incorporated with Fortran at spectral range of 0.25 to 1.00 m for eight different relative humidities (RHs) (0, 50, 70, 80, 90, 95, 98 and 99%). The fine – mode and coarse – mode aerosol size distribution were also investigated. The partic

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Kaewkhao, Jakrapong, P. Lofimkitjaroenporn, S. Tuscharoen, T. Kittiauchawal, W. Chewpraditkul, and Pichet Limsuwan. "Measurement of Mass Attenuation Coefficients of Blue Sapphire at Different Photon Energy by Compton Scattering Technique." Applied Mechanics and Materials 103 (September 2011): 71–75. http://dx.doi.org/10.4028/www.scientific.net/amm.103.71.

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The mass attenuation coefficients of blue sapphire were measured at the different energy of γ-rays using the Compton scattering technique. There are in good agreement of scattered gamma rays energies between theoretical value and experimental value, reflecting the validation of Compton scattering system setup. The results show that, the experimental values of mass attenuation coefficient are in good agreement with the theoretical values. The mass attenuation coefficients increase with the decrease in gamma rays energies. This may be attributed to the higher photon interaction probability of bl

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Nishidate, Izumi, Tomohiro Ishizuka, Afrina Mustari, et al. "Evaluation of Cerebral Hemodynamics and Tissue Morphology of In Vivo Rat Brain Using Spectral Diffuse Reflectance Imaging." Applied Spectroscopy 71, no. 5 (2016): 866–78. http://dx.doi.org/10.1177/0003702816657569.

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We investigated a quantitative imaging of reduced scattering coefficients μs’( λ) and the absorption coefficients μa( λ) of in vivo cortical tissues in the range from visible to near-infrared (NIR) wavelengths based on diffuse reflectance spectral imaging technique. In this method, diffuse reflectance images of in vivo cortical tissue are acquired at nine wavelengths (500, 520, 540, 560, 570, 580, 600, 730, and 760 nm). A multiple regression analysis aided by the Monte Carlo simulation for the absorbance spectra is then utilized to estimate the optical coefficients of cortical tissue. This ana

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Hassanabadi, Hassan, Hadi Sobhani, and Won Sang Chung. "Scattering Study of Fermions due to Double Dirac Delta Potential in Quaternionic Relativistic Quantum Mechanics." Advances in High Energy Physics 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/8124073.

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We have studied the scattering problem of relativistic fermions from a quaternionic double Dirac delta potential. We have used Dirac equation in the presence of the scalar and vector potentials in the quaternionic formalism of relativistic quantum mechanics to study the problem. The wave functions of different regions have been derived. Then, using the reflection coefficient, transmission coefficient, and the continuity equation, the scattering problem has been investigated in detail. It has been shown that we have faced some fluctuations in the reflection and transmission coefficients.

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Ismailov, M. I., and Cihan Sabaz. "Uniqueness criteria for inverse scattering problem in terms of transmission matrix in boundary condition for a first order system of ordinary differential equations." Baku Mathematical Journal 3, no. 2 (2024): 214–19. http://dx.doi.org/10.32010/j.bmj.2024.18.

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The inverse scattering problem (ISP) involves the recovery of the matrix coefficient of a first-order system on the half-line from its scattering matrix. Specifically, when the matrix coefficient exhibits a triangular structure, the system possesses a Volterra-type integral transformation operator at infinity. This transformation operator facilitates the determination of the scattering matrix on the half-line through matrix Riemann-Hilbert factorization. Solving the ISP on the half-line entails reducing it to an ISP on the whole line for the considered system. This reduction involves extending

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Yan, Qingyun, and Weimin Huang. "GNSS-R Delay-Doppler Map Simulation Based on the 2004 Sumatra-Andaman Tsunami Event." Journal of Sensors 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/2750862.

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A new method for simulating Global Navigation Satellite System-Reflectometry (GNSS-R) delay-Doppler maps (DDMs) of a tsunami-dominant sea surface is presented. In this method, the bistatic scattering Z-V model, the sea surface mean square slope model of Cox and Munk, and the tsunami-induced wind perturbation model are employed. The feasibility of the Cox and Munk model under a tsunami scenario is examined by comparing the Cox and Munk model based scattering coefficient with the Jason-1 measurement. A good consistency between these two results is obtained with a correlation coefficient of 0.93.

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Sefkow, A., M. Bree, and M. A. MyCek. "Method for Measuring Cellular Optical Absorption and Scattering Evaluated Using Dilute Cell Suspension Phantoms." Applied Spectroscopy 55, no. 11 (2001): 1495–501. http://dx.doi.org/10.1366/0003702011953711.

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The opal glass method (OGM) is a standard technique used by the ocean optics community to measure the spectral absorption coefficients of algal suspensions. We present and evaluate this method for its potential application to measurements of the inherent optical properties (optical absorption and scattering coefficients) of dilute mammalian cell suspensions, as an alternative to the integrating sphere method. In a series of controlled experiments on absorbing and scattering phantoms (Evans blue dye and polystyrene spheres 1–20 μm in diameter), separation of absorption and scattering was possib

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Chauchard, F., J. M. Roger, V. Bellon-Maurel, C. Abrahamsson, S. Andersson-Engels, and S. Svanberg. "MADSTRESS: A Linear Approach for Evaluating Scattering and Absorption Coefficients of Samples Measured Using Time-Resolved Spectroscopy in Reflection." Applied Spectroscopy 59, no. 10 (2005): 1229–35. http://dx.doi.org/10.1366/000370205774430828.

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Time-resolved spectroscopy is a powerful technique permitting the separation of the scattering properties from the chemical absorption properties of a sample. The reduced scattering coefficient and the absorption coefficient are usually obtained by fitting diffusion or Monte Carlo models to the measured data using numerical optimization techniques. However, these methods do not take the spectral dimension of the data into account during the evaluation procedure, but evaluate each wavelength separately. A procedure involving multivariate methods may seem more appealing for people used to handli

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Leskinen, A., A. Arola, M. Komppula, et al. "Seasonal cycle and source analyses of aerosol optical properties in a semi-urban environment at Puijo station in Eastern Finland." Atmospheric Chemistry and Physics Discussions 12, no. 2 (2012): 4719–54. http://dx.doi.org/10.5194/acpd-12-4719-2012.

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Abstract. We introduce a four-year (2006–2010) continuous data set of aerosol optical properties at Puijo in Kuopio, Finland. We study the annual and diurnal variation of the aerosol scattering and absorption coefficients, hemispheric backscattering fraction, scattering Ångström exponent, and single scattering albedo, whose averages over this period were 11.1 Mm−1 (at 550 nm), 1.5 Mm−1 (at 670 nm), 0.13, 1.9, and 0.83, respectively. The scattering coefficient peaked in the spring and autumn, being 2–4 times those in the summer and winter. An exception was the summer of 2010, when the the scatt

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Marshall, Julia, Ulrike Lohmann, W. Richard Leaitch, et al. "Optical Properties of Aerosol Particles over the Northeast Pacific." Journal of Applied Meteorology 44, no. 8 (2005): 1206–20. http://dx.doi.org/10.1175/jam2267.1.

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Abstract In July 2002, atmospheric aerosol measurements were conducted over the northeast Pacific Ocean as part of the Subarctic Ecosystem Response to Iron Enhancement Study (SERIES). The following aerosol quantities were measured: particle number size distribution, particle scattering and backscattering coefficients at three wavelengths, particle absorption coefficient at one wavelength, and size-segregated particle chemical composition. Using Mie theory to calculate the aerosol particle scattering and absorption coefficients from the size distribution and chemical measurements, closure with

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Zhao, W., X. Xu, M. Dong, et al. "Development of a cavity enhanced aerosol albedometer." Atmospheric Measurement Techniques Discussions 7, no. 3 (2014): 2981–3019. http://dx.doi.org/10.5194/amtd-7-2981-2014.

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Abstract. We report on the development of a cavity enhanced aerosol single scattering albedometer incorporating incoherent broad-band cavity-enhanced spectroscopy (IBBCEAS) approach and an integrating sphere (IS) for simultaneous in situ measurements of aerosol scattering and extinction coefficients in the exact same sample volume. The cavity enhanced albedometer employed a blue light-emitting diode (LED) based IBBCEAS approach for the measurement of wavelength-resolved aerosol optical extinction over the spectral range of 445–480 nm. An integrating sphere nephelometer coupled to the IBBCEAS s

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Sopinskyy, M. V., K. P. Grytsenko, C. Villringer, Yu V. Kolomzarov, and S. Schrader. "Determination of scattering and Urbach absorption contributions to the light extinction in PTFE films by using graphical representation technique and numerical solution of the inverse problem." Semiconductor Physics, Quantum Electronics and Optoelectronics 26, no. 3 (2023): 303–14. http://dx.doi.org/10.15407/spqeo26.03.303.

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Ellipsometrically obtained spectral dependences of ordinary αxy and extra-ordinary αz extinction/attenuation coefficients within the spectral range λ = 300…980 nm of uniaxially anisotropic polytetrafluoroethylene (PTFE) films were analyzed. We considered the capabilities and specific features of the graphical representation technique for determining the contribution of Rayleigh scattering and Urbach absorption to light attenuation in the spectral range beyond fundamental absorption. It has been shown that the graphical approach enables to estimate these contributions qualitatively, semi-quanti

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Edström, Per, Magnus Neuman, and Ludovic G. Coppel. "A partial explanation of the dependence between light scattering and light absorption in the Kubelka-Munk model." Nordic Pulp & Paper Research Journal 27, no. 2 (2012): 426–30. http://dx.doi.org/10.3183/npprj-2012-27-02-p426-430.

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Abstract The Kubelka-Munk scattering and absorption coefficients of a set of paper samples are assessed using reflectance measurements in d/0 geometry. The coefficients display the widely studied dependence between light scattering and light absorption, since the light scattering coefficient decreases in regions of high absorption. It is shown using general radiative transfer theory that part of this dependence can be explained and eliminated by taking into account the geometry of the d/0 instrument and the single scattering anisotropy, thus capturing the angular variations of the light reflec

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Lacombe, C., J. L. Steinberg, C. C. Harvey, D. Hubert, A. Mangeney, and M. Moncuquet. "Density fluctuations measured by ISEE 1-2 in the Earth's magnetosheath and the resultant scattering of radio waves." Annales Geophysicae 15, no. 4 (1997): 387–96. http://dx.doi.org/10.1007/s00585-997-0387-5.

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Abstract. Radio waves undergo angular scattering when they propagate through a plasma with fluctuating density. We show how the angular scattering coefficient can be calculated as a function of the frequency spectrum of the local density fluctuations. In the Earth's magnetosheath, the ISEE 1-2 propagation experiment measured the spectral power of the density fluctuations for periods in the range 300 to 1 s, which produce most of the scattering. The resultant local angular scattering coefficient can then be calculated for the first time with realistic density fluctuation spectra, which are neit

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