Добірка наукової літератури з теми "Spatial photometry"
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Статті в журналах з теми "Spatial photometry"
Liu, Long, Yun Cui Zhang, and Jun Xiao. "The Influencing Factor Analyses of Narrow Beam LED Luminaire Performance Test." Advanced Materials Research 694-697 (May 2013): 3283–86. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.3283.
Повний текст джерелаTinbergen, J. "Array Polarimetry and Optical-Differencing Photometry." Symposium - International Astronomical Union 167 (1995): 197–205. http://dx.doi.org/10.1017/s0074180900056448.
Повний текст джерелаBezugla, Natalia, Serhii Poluectov, Vladyslav Chornyi, and Mikhail Bezuglyi. "MONTE CARLO SIMULATION OF LIGHT SCATTERING IN HUMAN SKIN LAYERS BY SPATIAL PHOTOMETRY METHODS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 61(1) (June 30, 2021): 91–100. http://dx.doi.org/10.20535/1970.61(1).2021.237112.
Повний текст джерелаXiao, Kai, and Haibo Yuan. "Validation and Improvement of the Pan-STARRS Photometric Calibration with the Stellar Color Regression Method." Astronomical Journal 163, no. 4 (March 22, 2022): 185. http://dx.doi.org/10.3847/1538-3881/ac540a.
Повний текст джерелаThanjavur, Karun, Željko Ivezić, Sahar S. Allam, Douglas L. Tucker, J. Allyn Smith, and Stephen Gwyn. "Photometric cross-calibration of the SDSS Stripe 82 Standard Stars catalogue with Gaia EDR3, and comparison with Pan-STARRS1, DES, CFIS, and GALEX catalogues." Monthly Notices of the Royal Astronomical Society 505, no. 4 (May 22, 2021): 5941–56. http://dx.doi.org/10.1093/mnras/stab1452.
Повний текст джерелаRau, M. M., C. B. Morrison, S. J. Schmidt, S. Wilson, R. Mandelbaum, Y.-Y. Mao, David Alonso, et al. "A composite likelihood approach for inference under photometric redshift uncertainty." Monthly Notices of the Royal Astronomical Society 509, no. 4 (November 12, 2021): 4886–907. http://dx.doi.org/10.1093/mnras/stab3290.
Повний текст джерелаDENIEL, Jean-Marc. "Computing spatial distribution of tube and louvre luminaires efficiency from their description." International Journal of Sustainable Lighting 22, no. 1 (June 15, 2020): 12–27. http://dx.doi.org/10.26607/ijsl.v22i1.94.
Повний текст джерелаCaldwell, John A. R., and C. David Laney. "Cepheids in the Magellanic Clouds." Symposium - International Astronomical Union 148 (1991): 249–57. http://dx.doi.org/10.1017/s0074180900200545.
Повний текст джерелаBezuglyi, Mikhail, and Natalia Bezuglaya. "Raman Spectroscopy Principles for in vivo Diagnostic by Ellipsoidal Reflectors." Electrical, Control and Communication Engineering 15, no. 1 (September 1, 2019): 39–46. http://dx.doi.org/10.2478/ecce-2019-0006.
Повний текст джерелаMimica, P., and K. Pavlovski. "Reconstruction of an Accretion Disk Image in AU Mon from CoRoT Photometry." Proceedings of the International Astronomical Union 7, S282 (July 2011): 63–64. http://dx.doi.org/10.1017/s1743921311026901.
Повний текст джерелаДисертації з теми "Spatial photometry"
Zangari, Amanda Marie. "Investigating spatial variation in the surface and atmosphere of Pluto through stellar occultations and PSF photometry." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82305.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 231-239).
Stellar occultations provide a high-resolution view of a single chord through Pluto's atmosphere. This thesis presents three projects related to stellar occultation observations of Pluto. The first project concerns the ground testing of the High-speed Imaging Photometer for Occultations (HIPO), a camera aboard the Stratospheric Observatory For Infrared Astronomy (SOFIA). Differential photometry was found to be reliable to one part in 104. The second project is a modern determination of the light ratio of Charon and Pluto, essential for predicting future occultations. The final project considers twenty years worth of Pluto stellar occultation results, including new measurements using HIPO, and determines whether temperature asymmetries can be seen in fits for the upper atmosphere. These measurements allow the first Earth-based assessment of Pluto's geographic temperature distribution. Included is a description of the extensive test modeling to determine the boundary selection methods for the upper atmosphere for each differently-shaped light curve. The temperature asymmetries or lack thereof, are considered in the context of time of day, average insolation and surface features in the vicinity of the area near the occultation half-light radius. No clear correlation was found for any of the three metrics, suggesting that Pluto's atmosphere is spatially isothermal.
by Amanda Marie Zangari.
Ph.D.
Безугла, Наталя Василівна. "Просторова фотометрія біологічних середовищ". Thesis, НТУУ "КПІ", 2016. https://ela.kpi.ua/handle/123456789/15918.
Повний текст джерелаThe thesis is devoted to developing the method of photometric analysis of biological media by expansion the space of definition their optical properties. That made possible the simultaneously consider the characteristics of the optical radiation, reflected and transmitted by biological media, within the full solid angle. In the work the main methods of solution the basic equation of radiative transfer theory in problems of optical biomedical diagnostics, were analyzed. Thus, the main attention focused on optical parameters of biological media: scattering (μs), absorption (μa) coefficients, and the anisotropy factor of single scattering (g), which are responsible for spatial distribution of scattered radiation by normal and pathology tissues or media (first order approximation, diffuse approximation, small angle approximation, flux models, Monte Carlo method). Conditions of use depending the type of biological media are described. The phase functions of single scattering (Mie, Henyey-Greenstein, Gegenbauer kernel, Delta-Eddington, Eddington), which used to describe the propagation the optical radiation in different types of biological media, were considered. Systematized the methods and tools of biophotonics with the possibilities of spatial-oriented analysis of radiation, scattered by sample of biological media, organs and body parts. Goniometric and spherical types of experimental setup are the most appropriated types that can used for spatial photometry. Photometric image of varying thickness samples of biological media by ellipsoidal reflectometry were received. Based on experimental research, the axial asymmetry of anisotropy of scattering by porcine and chicken muscle tissues of varying thickness in vitro at a wavelength of 632.8 nm was found. The influence of anisotropy of scattering on accuracy of determination the optical coefficients of diffuse reflection and total transmission by method Monte Carlo was demonstrated. Study of spatial anisotropy scattering by method of photometry was suggested. On this basis, has developed methods of implementing of the mathematical basis of spatial photometry of biological media by determining the scattering intensity along parallels (circular bands) and meridians (sections). The mechanism of the transition from experimentally determined indicatrix of scattering of thick sample to the anisotropy factor of single scattering by designed methods is proposed. The proposed scheme-technical versions of information-measurement system for spatial photometry along sections with two and eight channel, which were realized in experimental setups of goniometric and spherical type. The features of element synthesis, exploitation and calibration of setups are described. The interfaces and methods of application of developed software for parallel photometric analysis "IMSOB" and "IMSOB-2", to support research the scattering indicatrix along sections in reflected or transmitted light for two- and eight-channel systems respectively are given. The method of sample preparation of biological media and features of experiment for different experimental setups of spatial photometry are given. The methodology of preparation the biological samples used for research in this paper were detail described. The analysis of the indicatrix of laser light scattering by thick samples of muscle tissue at different wavelengths with transverse and longitudinal placement of fibers was made. The data obtained by method of spatial photometry, which realized the principle of analyses of the sections. Experimental studies conducted on goniometric type setup. For phase function of single scattering Henyey-Greenstein, modified by isotropic component in each sections, the transition from indicatrix scattering of thick sample to the single scattering anisotropy factor g was made. Identity of experimentally-determined values of the optical coefficients of diffuse reflection and total transmission and determined by the results of Monte Carlo simulation using the average values by sections of the anisotropy factor of single scattering are approved.
Диссертация посвящена разработке метода фотометрического анализа биологических сред путем расширения пространства определения их оптических свойств, что позволило одновременно учесть характеристики отраженного и пропущенного средой оптического излучения в пределах полного телесного угла. В работе разработаны методики реализации математического базиса пространственной фотометрии биологических сред по принципу определения интенсивности рассеяния по параллелям (кольцевым полосам) и меридианам (сечениям). Предложены схемотехнические решения двух- и восьмиканальной информационно-измерительных систем для пространственной фотометрии по сечениям, реализованные на уровне экспериментальных установок. Разработано программное обеспечение фотометрического параллельного анализа, позволяющее исследовать индикатрисы рассеяния по сечениям. Проведен анализ индикатрис рассеяния лазерного излучения толщинными образцами мышечных тканей на различных длинах волн и с разным размещением волокон. Осуществлен переход от индикатрисы рассеяния толщинных образцов к фактору анизотропии однократного рассеяния. Доказана идентичность экспериментально определенных величин оптических коэффициентов диффузного отражения и полного пропускания и определенных по результатам моделирования Монте-Карло с использованием усредненной по сечениям величины фактора анизотропии однократного рассеяния.
PEFFERKORN, STEPHANE. "Photometrie mesopique, evaluation liee a la structure spatiale des sources de lumiere." Paris, CNAM, 1995. http://www.theses.fr/1995CNAM0223.
Повний текст джерелаPavelka, Adam. "Numerické modelování zdrojů světla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219144.
Повний текст джерелаZong, Weikai. "Amplitude and frequency modulations of oscillation modes in hot B subdwarf and white dwarf stars from Kepler photometry." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30306/document.
Повний текст джерелаNonlinear mode interactions, inducing amplitude and frequency modulations, are difficult to observe from ground-based telescopes as these typical timescales of the modulations are of the order of weeks, months, or even years. The launch of space telescopes such as Kepler (operated by NASA) has tremendously changed the situation by providing new data for this research field. In this thesis, we analyze the Kepler photometric data observed for 24 compact pulsators, including 18 hot B subdwarf (sdB) stars and six white dwarf stars. We find that it is a common phenomenon that oscillation modes in these pulsating stars show amplitude and/or frequency variations. We focus in particular on two stars, KIC 08626021, a DB white dwarf, and KIC 10139564, a short period sdB star. KIC 08626021 and KIC 10139564 have been monitored by Kepler in short-cadence mode for nearly two years and more than three years without interruption, respectively. By analyzing in depth these high-quality photometric data, we find that the modes within triplets induced by rotation clearly reveal different types of behaviors : their frequency and amplitude may exhibit either periodic or irregular modulations, or remain constant. These various behaviors can be linked to those predicted within the amplitude equation formalism in the case of the nonlinear resonant mode coupling mechanism, particularly for the modulation timescales. Furthermore, we find that the triplet resonance modes can also interact with outside modes through other types of resonances such as the three-mode resonance v 0 ~ v 1 + v 2 , which is not considered within the current nonlinear theoretical frameworks. These findings constitute the first clear evidence of nonlinear resonant mode couplings occurring in compact pulsators. This should resonate as a warning to projects aiming at measuring the evolutionary change rate of pulsation periods in compact stars in general. Nonlinear modulations of the frequencies can potentially jeopardize any attempt to measure reliably such rates, unless they can be corrected beforehand. The observed modulations characterized in this thesis provide new insights to "nonlinear asteroseismology" and call for new methods to process the signals of variable modes from the observed light curves. We foresee that increasing attention will focus on these nonlinear phenomena in various types of pulsating stars observed from space in the near future, thus reviving interest in the nonlinear oscillation theory in general
Belgacem, Ines. "Etude photométrique des lunes glacées de Jupiter." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS386/document.
Повний текст джерелаJupiter's icy moons are of great interest in the search for habitability in our Solar System. They probably all harbor liquid water ocean underneath their icy crust. Their surfaces present different stages of evolution – Callisto is heavily cratered and the oldest, Ganymede shows a combination of dark cratered terrain and younger bright plains and Europa’s surface is the youngest with signs of recent and maybe current activity. This work focuses on photometry, i.e. the study of the light scattered by a surface in relation to the illumination and observation geometry. Photometric studies give us insight on the physical state and microtexture of the surface (compaction, internal structure, shape, roughness, transparency…). A good photometric knowledge is also of crucial importance in the correction of datasets for any mapping or spectroscopic study as well as for the future missions of this decade – NASA’s Europa Clipper and ESA’s JUpiter ICy moons Explorer.Two pieces of information are necessary to conduct a photometric study – reflectance data and geometric information (illumination, viewing conditions). For the former, we have used and calibrated images from past space missions – Voyager, New Horizons and Galileo. For the latter, we have developed tools to correct these images metadata (e.g. spacecraft position and orientation) to derive precise geometric information. Moreover, we have developed a Bayesian inversion tool to estimate Hapke’s photometric parameters on regions of Europa, Ganymede and Callisto. We estimate all parameters on our entire dataset at once. Finally, we discuss the possible links between the photometric parameters, the surface microtexture and endogenic/exogenic processes
Pipien, Sarah. "A la recherche de quasars à grand décalage spectral dans le sondage CFHQSIR." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0376/document.
Повний текст джерелаMy PhD work is focused on the search for high-redshift quasars in the Canada France High-z Quasar Survey in the Near Infrared (CFHQSIR). The main scientific objective of this CFHT Large Program is to search for quasars at redshift z $\sim$ 7 with near-infrared images of the CFHTLS Wide fields acquired with the CFHT WIRCam camera. Firstly, I carried out the photometric calibration of the CFHQSIR images. I performed a detailed analysis of the CFHQSIR data by studying their quality, as well as their noise properties and their depths.Secondly, I computed the number of high-redshift quasars that could be detected with CFHQSIR and the corresponding constraints which could be put on the z $\sim$ 7 quasar luminosity function. Then, I proceeded to the identification of quasar candidates among the many thousands of sources in the 130 square degrees covered by CFHQSIR. Photometric follow-up observations of the candidates revealed about fifty objects, of which fifteen were chosen to be spectroscopically observed with the Very Large Telescope (VLT). Given that this spectroscopic follow-up is not yet completed, the exact nature of these sources will only be known in the coming months. To finish, I applied Bayesian model comparison to my sample in order to complete and consolidate my selection procedure. My candidates were finally classified according to their probability to be a high-redshift quasar. I verified that the majority of the most likely candidates were selected for spectroscopic observations
Jasinghege, Don Prasanna Deshapriya. "Spectrophotometric properties of the nucleus of the comet 67P/Churyumov-Gerasimenko observed by the ROSETTA spacecraft." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC007/document.
Повний текст джерелаThis thesis is based on the spectrophotometric properties of the comet 67P/Churyumov-Gerasimenko, using the OSIRIS instrument of Rosetta space mission. Composed of two scientific cameras to observe the nucleus and the coma of the comet, OSIRIS images are acquired with multiple filters, that span the near-UV to near-IR wavelength range. They were used to study the spectrophotometric curves of the exposed bright features that appeared on the surface of the cometary nucleus, leading to a comparative study, that was carried out in collaboration with the VIRTIS spectro-imager aboard Rosetta, that demonstrated, that these exposures are related to H2O ice, using its absorption band located at 2 microns. The thesis further details a spectrophotometric study of the Khonsu region in the southern latitudes of the comet, where the seasonal variation of the spectral slope of different types of terrains is explored. Finally, the results of an extended survey of exposed bright features are presented. More than 50 individual features are presented under four morphologies along with an albedo calculation, suggesting that different activity sources are responsible for their appearance on the nucleus
Radonjić, Ana. "Spatial and photometric factors modulating the effect of depth on lightness." 2009. http://hdl.rutgers.edu/1782.2/rucore10002600001.ETD.000051313.
Повний текст джерелаJetté, Pomerleau Vincent. "Étude électrophysiologique de l’impact de la couleur dans le déploiement attentionnel." Thèse, 2014. http://hdl.handle.net/1866/10726.
Повний текст джерелаWe investigated how target color affected behavioral and electrophysiological results in a visual search task. Perceptual and attentional mechanisms were tracked using the N2pc component of the event-related potential and other lateralized components. Four colors (red, green, blue, or yellow) were calibrated for each participant for luminance through heterochromatic flicker photometry and equated to the luminance of grey distractors. Each visual display contained 10 circles, 1 colored and 9 grey, each of which contained an oriented line segment. The task required deploying attention to the colored circle, which was either in the left or right visual hemifield. Three lateralized ERP components relative to the side of the lateral colored circle were examined: a posterior contralateral positivity (Ppc) prior to N2pc, the N2pc, reflecting the deployment of visual spatial attention, and a temporal and contralateral positivity (Ptc) following N2pc. Red or blue stimuli, as compared to green or yellow, had an earlier N2pc. Both the Ppc and Ptc had higher amplitudes to red stimuli, suggesting particular selectivity for red. The results suggest that attention may be deployed to red and blue more quickly than to other colors and suggests special caution when designing ERP experiments involving stimuli in different colors, even when all colors are equiluminant.
Книги з теми "Spatial photometry"
Spehar, Branka, and Colin W. G. Clifford. The Wedding Cake Illusion. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0059.
Повний текст джерелаЧастини книг з теми "Spatial photometry"
Gruneisen, Rachel. "High Precision Photometry from Space with COROT: Effect of the Spatial Image Jitter on the Photometric Performances of CCDs." In Optical Detectors for Astronomy, 217–22. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5262-4_33.
Повний текст джерелаSanto, Hiroaki, Michael Waechter, and Yasuyuki Matsushita. "Deep Near-Light Photometric Stereo for Spatially Varying Reflectances." In Computer Vision – ECCV 2020, 137–52. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58598-3_9.
Повний текст джерелаQuéau, Yvain, François Lauze, and Jean-Denis Durou. "A $$L^1$$ -TV Algorithm for Robust Perspective Photometric Stereo with Spatially-Varying Lightings." In Lecture Notes in Computer Science, 498–510. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18461-6_40.
Повний текст джерелаFukunishi, H., Y. Watanabe, A. Uchida, and Y. Takahashi. "Spatial and temporal structures of sprites and elves observed by array photometers." In Space Weather Study Using Multipoint Techniques, Proceedings of the COSPAR Colloquium, 283–88. Elsevier, 2002. http://dx.doi.org/10.1016/s0964-2749(02)80230-x.
Повний текст джерелаТези доповідей конференцій з теми "Spatial photometry"
Magunov, Alexander N., and A. Y. Gasilov. "Spatial scanning microspectrophotometer." In Photometry: Selected Papers from the 8th and 9th CIS Conferences, edited by Leonid S. Ushakov. SPIE, 1993. http://dx.doi.org/10.1117/12.166355.
Повний текст джерелаBezuglaya, N. V., and M. A. Bezuglyi. "Spatial photometry of scattered radiation by biological objects." In 1st International Conference "Biophotonics Riga 2013", edited by Janis Spigulis and Ilona Kuzmina. SPIE, 2013. http://dx.doi.org/10.1117/12.2044609.
Повний текст джерелаGaneev, Rashid A. "Express photometric method for determination spatial characteristics of laser radiation." In Photometry: Selected Papers from the 8th and 9th CIS Conferences, edited by Leonid S. Ushakov. SPIE, 1993. http://dx.doi.org/10.1117/12.166356.
Повний текст джерелаAndreeva, L. I., V. A. Belokon, F. A. Ermalitski, and V. A. Shevtsov. "Spatial and spectral variations on zone characteristics of fast-response one-quantum photomultiplier 28ELUF-15." In Photometry: Selected Papers from the 8th and 9th CIS Conferences, edited by Leonid S. Ushakov. SPIE, 1993. http://dx.doi.org/10.1117/12.166364.
Повний текст джерелаMontinaro, Cinzia, Barbara Spagnolo, Marco Pisanello, Filippo Pisano, Antonio Balena, Marco Bianco, Virgilio Brunetti, et al. "Estimating the Spatial Behavior of Fiber Photometry Across Different Brain Regions." In Optics and the Brain. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/brain.2021.btu1b.3.
Повний текст джерелаGontcharov, G., A. Mosenkov, V. Il’in, A. Marchuk, S. Savchenko, A. Smirnov, and P. Usachev. "Interstellar extinction at high Galactic latitudes across the whole dust layer in the Galaxy." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.181.
Повний текст джерелаMansy, May M., Hongjae Kim, and Karim G. Oweiss. "Spatial detection characteristics of a single photon fiber photometry system for imaging neural ensembles*." In 2019 9th International IEEE/EMBS Conference on Neural Engineering (NER). IEEE, 2019. http://dx.doi.org/10.1109/ner.2019.8717005.
Повний текст джерелаBezuglyi, M., N. Bezuglaya, and A. Viruchenko. "On the possibility of ellipsoidal photometry and Monte Carlo simulation to spatial analysis of biological media." In 2017 IEEE 37th International Conference on Electronics and Nanotechnology (ELNANO). IEEE, 2017. http://dx.doi.org/10.1109/elnano.2017.7939771.
Повний текст джерелаKling, Kerstin, and Dieter Mewes. "Visualization of Micro- and Macromixing in Liquid Mixtures of Reacting Components (Keynote Paper)." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45216.
Повний текст джерелаHonzatko, David, Engin Turetken, Pascal Fua, and L. Andrea Dunbar. "Leveraging Spatial and Photometric Context for Calibrated Non-Lambertian Photometric Stereo." In 2021 International Conference on 3D Vision (3DV). IEEE, 2021. http://dx.doi.org/10.1109/3dv53792.2021.00049.
Повний текст джерела