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Relevant bibliographies by topics / Extinction spectrum

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Academic literature on the topic 'Extinction spectrum'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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Journal articles on the topic "Extinction spectrum"

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Zenhom, Heba, Ahmed Ghitas, Mohamed M. Abdelwahab, Mohamed S. Alnawawy, Amir H. Hassan, and Ahmed Abulwfa. "Impact of atmospheric extinction coefficient on the solar spectrum at selective wavelengths at Helwan in Egypt." IOP Conference Series: Materials Science and Engineering 1269, no. 1 (2022): 012011. http://dx.doi.org/10.1088/1757-899x/1269/1/012011.

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Solar irradiance alterations due to the various atmospheric conditions have received great scientific concern. These alternations can be investigated by both monochromatic extinction coefficient and atmospheric transparency. In this work, continuous measurements of solar spectral irradiation using the Spectroradiometer for six selective wavelengths (350, 368, 500, 615, 780, and 870 nm) are carried out at the Helwan station, (NRIAG) in Egypt. Twelve clear-sky days of continuous observations have been monitored under different atmospheric conditions. The results have shown that using Langley met

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LI, Chunchun, Jingyao GAO, Xiaoqin WANG, Gongwu WANG, and Jun CAO. "Effects of Different Extinction for Morphine-CPP on Hippocampal EEG Power Spectrum in Mice." Wuhan University Journal of Natural Sciences 27, no. 3 (2022): 265–72. http://dx.doi.org/10.1051/wujns/2022273265.

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The relationship between hippocampal electroencephalogram (EEG) power spectrum and the extinction of addiction memory was investigated. Forty KM mice (Kunming mice) that had successfully established morphine (MOR)-conditioned place preference (CPP) were divided into four groups: saline-training extinction (SAL-TE), SAL-natural extinction (SAL-NE), MOR-TE, MOR-NE, for extinction treatment and EEG recording in the dorsal and ventral hippocampus (DH/VH). Results show that the CPP score of MOR-TE significantly decreased and the total, β and γ bands power spectrum of MOR-TE was suppressed. Notably,

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Melott, Adrian L., and Richard K. Bambach. "Analysis of periodicity of extinction using the 2012 geological timescale." Paleobiology 40, no. 2 (2014): 177–96. http://dx.doi.org/10.1666/13047.

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Analysis of two independent data sets with increased taxonomic resolution (genera rather than families) using the revised 2012 timescale reveals that an extinction periodicity first detected by Raup and Sepkoski (1984) for only the post-Paleozoic actually runs through the entire Phanerozoic. Although there is not a local peak of extinction every 27 Myr, an excess of the fraction of genus extinction by interval follows a 27-Myr timing interval and differs from a random distribution at the p ∼ 0.02 level. A 27-Myr periodicity in the spectrum of interval lengths no longer appears, removing the qu

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Newman, M. E. J., and Gunther J. Eble. "Decline in extinction rates and scale invariance in the fossil record." Paleobiology 25, no. 4 (1999): 434–39. http://dx.doi.org/10.1017/s0094837300020303.

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We show that the decline in the extinction rate during the Phanerozoic can be accurately described by a logarithmic fit to the cumulative total extinction. This implies that extinction intensity is falling off approximately as the reciprocal of time. We demonstrate that this observation alone is sufficient to explain the existence of the proposed power-law forms in the distribution of the sizes of extinction events and in the power spectrum of Phanerozoic extinction, results that previously have been explained by appealing to self-organized critical theories of evolutionary dynamics.

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Shao 邵, Zhenzhen 珍珍, and Biwei 碧沩 Jiang 姜. "Silicate Extinction Profile Based on the Stellar Spectrum by Spitzer/IRS." Astrophysical Journal 963, no. 2 (2024): 120. http://dx.doi.org/10.3847/1538-4357/ad1dd8.

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Abstract The 9.7 and 18 μm interstellar spectral features, arising from the Si–O stretching and O–Si–O bending modes of amorphous silicate dust, are the strongest extinction features in the infrared. Here we use the “pair method” to determine the silicate extinction profile by comparing the Spitzer/IRS spectra of 49 target stars with obvious extinction with those of unreddened stars of the same spectral type. The 9.7 μm extinction profile is determined from all the 49 stars and the 18 μm profile is determined from six stars. It is found that the profile has a peak wavelength at ∼9.2–9.8 and ∼1

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Nordtug, Trond, and Thor Bernt Melø. "Investigation of the Screening Pigment System in the Compound Eye of the Moth Agrotis segetum (fam. Noctuidae) by Visible Reflectometry." Zeitschrift für Naturforschung C 42, no. 1-2 (1987): 152–56. http://dx.doi.org/10.1515/znc-1987-1-225.

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Abstract The functional properties of the light adaptation system in the superposition eye of the moth Agrotis segetum have been investigated by reflection spectroscopy. The spectrum of the reflected light from the tapetum of dark adapted eyes had a peak at about 580 nm corresponding to a spacing between the reflecting layers in the tapetum of 145 nm. During light adaptation of the eye the observed reflectance changes could be explained by light extinction in one screening pigment. The shape of the extinction spectrum of the screening was constant throughout the adaptation process and after a

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Lutz, D. "3.2. ISO spectroscopy of the Galactic center and starburst nuclei." Symposium - International Astronomical Union 184 (1998): 91–92. http://dx.doi.org/10.1017/s0074180900084151.

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Since its launch in November 1995, the Infrared Space Observatory ISO has converted mid-infrared spectroscopy into a mature tool. Due to its proximity, brightness, and the wealth of complementary information, the center of our Galaxy remains a unique testbed for studies of galactic nuclei. A first analysis of the 2.4-45μm spectrum obtained with ISO-SWS (Fig. 1) has been presented by Lutz et al. (1996a). One of the surprises is a determination of the mid-infrared extinction law from comparison of the Galactic center hydrogen recombination line fluxes and case B expectations: The extinction law

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Zheng, Yuxia, Paerhatijiang Tuersun, Remilai Abulaiti, Dengpan Ma, and Long Cheng. "Retrieval of Size Distribution and Concentration of Au-Ag Alloy Nanospheroids by Spectral Extinction Method." Materials 15, no. 5 (2022): 1778. http://dx.doi.org/10.3390/ma15051778.

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In order to monitor the synthesis processes or characterize nanoparticles for application, a new method that allows in situ determination of the two-dimensional size distribution and concentration of Au-Ag alloy nanospheroids, based on their extinction spectrum, is developed. Non-negative Tikhonov regularization and T-matrix method were used to solve the inverse problem. The effects of the two-dimensional size steps, wavelength range, and measurement errors of extinction spectrum on the retrieval results were analyzed to verify the feasibility and accuracy of the retrieval algorithm. Through c

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Ma Wenying, 马文英, 杨欢 Yang Huan, 刘娟意 Liu Juanyi, 倪祖高 Ni Zugao, 唐东升 Tang Dongsheng, and 姚军 Yao Jun. "Influences of Shape on Extinction Spectrum for Metal Nanoparticles." Acta Optica Sinica 30, no. 9 (2010): 2629–33. http://dx.doi.org/10.3788/aos20103009.2629.

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Yang, Chun-Liang. "Optical extinction ratio monitoring techniques using optical spectrum analysis." Microwave and Optical Technology Letters 51, no. 8 (2009): 1800–1803. http://dx.doi.org/10.1002/mop.24512.

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Dissertations / Theses on the topic "Extinction spectrum"

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Колич, І. І. "Моделювання спектрів екстинкції періодичних наноструктур". Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/27612.

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Peña, Katherine. "A Component Analysis of Response Interruption and Redirection for Vocal Stereotypy in Children with Autism Spectrum Disorder." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7076.

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Response Interruption and Redirection (RIRD) was compared to no-interaction, continuous neutral sound, and contingent neutral sound in order to determine the mechanism by which RIRD functions to suppress vocal stereotypy in children diagnosed with autism spectrum disorder. A neutral sound was determined through the use of a preference assessment of various sounds. Use of a neutral sound did not suppress vocal stereotypy in participants. Manipulating the amount of time with a sound playing did not have an effect on vocal stereotypy either. These results suggest that it is u

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Kharroubi, Hassane. "Étude du pouvoir réflecteur de monocristaux uniaxes et biaxes dans l'infrarouge lointain." Nancy 1, 1994. http://www.theses.fr/1994NAN10108.

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L'étude du pouvoir réflecteur (r) et de la transmission (t) des milieux anisotropes et absorbants dans l'infrarouge lointain nous a conduit a présenter des expressions directement programmables des relations permettant la détermination des constantes optiques, l'indice de réfraction n et l'indice d'absorption k à partir des mesures expérimentales de r et de t. Nous avons établi les expressions des facteurs de réflexion et de transmission pour les deux polarisations possibles de l'onde, en fonction de l'angle d'incidence. L'étude est limitée au cas de la propagation d'une onde plane dans les pl

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Gennaro, Sylvain Damien. "Spectral interferometric microscopy reveals absorption by individual optical antennas from extinction phase." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/32355.

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In this thesis, we aim to understand how individual metallic nano-antennas can mediate the interaction of light with matter at optical frequencies. Firstly, we assess optical antennas in a focussed beam configuration and confirm recent theoretical predictions of extremely strong extinction by a dipole in a focussed beam. Our result reveals the practical limitation of focus - position related distortions in the extinction spectra due to the chromatic aberration of our microscopy system. From this insight, we develop a systematic approach to retrieve the longitudinal chromatic focal shift of our

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Estruch, T. "Extinction extraordinaire par superposition en champ proche de filtres élémentaires nanostructurés." Phd thesis, Université Paris-Diderot - Paris VII, 2013. http://tel.archives-ouvertes.fr/tel-01020030.

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Les objets structurés à l'échelle sub-longueur d'onde sont le siège d'interactions lumièrematière permettant d'obtenir des résonances d'amplitude extraordinaire localisées spectralement. Ils permettent ainsi la réalisation de filtres spectraux dans l'infrarouge. Pour améliorer les performances de ces filtres et ce, notamment en termes d'efficacité de réjection, j'ai étudié au cours de ma thèse la superposition de structures sub-longueur d'onde identiques mettant en jeu des modes évanescents et propagatifs. J'ai ainsi mis en évidence la présence d'une extinction extraordinaire de la transmissio

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Kitchener, Ben Gerald. "Star formation in dwarf galaxies : using the radio continuum as an extinction-free probe." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17207.

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To eliminate uncertainties introduced by extinction by dust in the optical, we examine to what extent the radio continuum (RC) can probe star formation in dwarf galaxies. Star formation (SF) drives galaxy formation and evolution; acquiring accurate measurements of SF thus becomes crucial in order to understand galaxies. As radio technology improves further, RC surveys will probe the fainter, more quiescent regime of the radio sky. Having a robust manner by which to convert RC luminosities to star formation rate (SFR) has the potential to provide millions of independent SFR measurements out to

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Chang, Xiaojun. "Spectral and Physicochemical Characteristics of nC60 in Aqueous Solutions." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77152.

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Despite its extremely low solubility in water, fullerite C₆₀ can form colloidally stable aqueous suspensions containing nanoscale C₆₀ particles (nC₆₀) when it is subject to contact with water. nC₆₀ is the primary fullerene form following its release to the environment. The aim of the present study was to provide fundamental insights into the properties and environmental impacts of nC₆₀. nC₆₀ suspensions containing negatively charged and heterogeneous nanoparticles were produced via extended mixing in the presence and absence of citrate and other carboxylates. These low-molecular weight acids w

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Yeshchenko, O. A., I. S. Bondarchuk, S. Z. Malynych, G. Chumanov, and I. Luzinov. "Laser-Induced Light Absorption in 2D Silver Nanoparticle Array." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42550.

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Nanocomposite comprising planar array of silver nanoparticles in polymer matrix was submitted to Ar laser irradiation at the wavelength of 488 nm. The extinction spectra of the array were measured as a function of the irradiation power density. Two collective surface plasmon modes, namely T and P, associated with particle dipoles parallel and perpendicular to the plane of the layer were identified. The extinction bands of T and P modes exhibit blue spectral shift with the increase of radiation power. P mode band broadens when laser power increases. The observed effects are explained by heatin

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Zou, Siwei. "Using quasar absorption lines to probe cold gas in high redshift galaxies." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS181/document.

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Les raies d'absorption de quasars sont des outils efficaces pour étudier le milieu interstellaire dans les galaxies. Dans ce travail, nous étudions un échantillon de soixante-six systèmes absorbants à z<1.5 sélectionnés pour la présence de raies d'absorption de CI intenses dans leurs spectres SDSS. Ils sont observés par les spectrographes X-shooter et UVES du VLT de l'ESO. Nous étudions en tout 17 systèmes observés par X-shooter. Nous déduisons la métallicité, la déplétion par la poussière, le taux d'extinction par la poussière et le taux d'absorption des raies de MgII, MgI, CaII et NaI déc

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Buton, Clément. "Étalonnage spectro-photométrique du SuperNova Integral Field Spectrograph dans le cadre du projet the Nearby Supernova Factory." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00465853.

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Il y a près d'une décennie, l'utilisation des supernovae de type Ia comme indicateurs de distances a permis de découvrir l'expansion accélérée de l'univers. Les expériences de seconde génération ont augmenté de manière significative la taille et la qualité des échantillons à grand décalage vers le rouge. Cependant, l'échantillon de référence des supernovae à faible décalage vers le rouge, nécessaire à la cosmologie restait très restreint. The Nearby Supernova Factory a mesuré, à l'aide d'un instrument spectro-photométrique dédié (the Supernova Integral Field Sepctrograph), près de 200 nouvelle

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Books on the topic "Extinction spectrum"

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United States. National Aeronautics and Space Administration., ed. UV extinction and IR emission in diffuse HII regions: Final technical report, August 15, 1991 - August 14, 1994. National Aeronautics and Space Administration, 1994.

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1958-, Hawkins Isabel, and United States. National Aeronautics and Space Administration., eds. Carbon stars with oxygen-rich circumstellar material. University of California, Los Angeles, Dept. of Astronomy, 1992.

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1958-, Hawkins Isabel, and United States. National Aeronautics and Space Administration., eds. Carbon stars with oxygen-rich circumstellar material. University of California, Los Angeles, Dept. of Astronomy, 1992.

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Edward J, Goodwin. 35 Threatened Species and Vulnerable Marine Ecosystems. Oxford University Press, 2015. http://dx.doi.org/10.1093/law/9780198715481.003.0035.

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This chapter examines ‘threatened species’ and ‘vulnerable marine ecosystems’ (VME) in the law of the sea. It teases out the broad-spectrum responses of international law that tackle principal anthropogenic threats, including the want of jurisdiction over marine resources, unsustainable fisheries, pollution, and habitat conservation. It then extracts rules from within environmental treaties designed to catch emergency cases, where individual species are close to extinction or sites are being degraded and disturbed.

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UV extinction and IR emission in diffuse HII regions. National Aeronautics and Space Administration, 1994.

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Book chapters on the topic "Extinction spectrum"

1

Weiss, Mary Jane, and Samantha Russo. "Extinction Procedures." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-6435-8_1137-3.

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Charman, Tony, Susan Hepburn, Moira Lewis, et al. "Escape Extinction." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_100549.

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Charman, Tony, Susan Hepburn, Moira Lewis, et al. "Extinction Procedures." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_1137.

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Weiss, Mary Jane, and Samantha Russo. "Extinction Procedures." In Encyclopedia of Autism Spectrum Disorders. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-91280-6_1137.

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Carnett, Amarie, and Laurie K. McLay. "Behavioral Extinction as a Treatment for Sleep Problems in Children on the Autism Spectrum." In Clinical Handbook of Behavioral Sleep Treatment in Children on the Autism Spectrum. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99134-0_13.

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Schmitt, Mark. "Embracing the Apocalypse: Extinction, Cosmic Pessimism and Ahuman Futures." In Spectres of Pessimism. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-25351-5_5.

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Krełowski, Jacek, Jacek Papaj, and Walter Wegner. "Residual Extinction Effects in Spectra of Newly Formed Stars." In Flare Stars in Star Clusters, Associations and the Solar Vicinity. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0607-5_60.

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Quinten, Michael, and Uwe Kreibig. "Optical Extinction Spectra of Systems of Small Metal Particles with Aggregates." In Optical Particle Sizing. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4757-1983-3_20.

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Jhutti, C. S., T. Jávorfi, M. N. Merzlyak, and K. Razi Naqvi. "Triplet-Triplet Absorption Spectra and Extinction Coefficients of Lutein, Neoxanthin And Violaxanthin." In Photosynthesis: Mechanisms and Effects. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_117.

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Horvath, H., F. J. Olmo, L. Alados Arboledas, et al. "Size Distributions of Particles Obtained by Inversion of Spectral Extinction and Scattering Measurements." In Optics of Cosmic Dust. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0628-6_9.

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Conference papers on the topic "Extinction spectrum"

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Chen, Guolong, Youlin Gu, Yihua Hu, et al. "Influence of activity on extinction characteristics of non-spherical bioparticle aggregates." In Conference on Spectral Technology and Applications (CSTA 2024), edited by Zhe Wang and Hongbin Ding. SPIE, 2024. https://doi.org/10.1117/12.3036986.

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Hwang, Hyeon, Mohamad Reza Nurrahman, Hyungjun Heo, et al. "Multiband electro-optic modulator employing a lithium niobate racetrack resonator integrated with two pulley couplers." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.atu4m.6.

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We present a multiband electro-optic modulator based on a lithium niobate racetrack micro-resonator. Integration with two pulley couplers allows high-extinction modulation over multiple spectral bands of 775, 980, and 1550 nm in a single device.

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Wang, Yutian, Mariusz Klimczak, Katarzyna Krupa, et al. "Nanostructured silica glass for mode locked fiber laser." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jw2a.10.

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Mode-locking operation is demonstrated in all-fiber laser incorporating a nanostructured Yb+Er co-doped silica SMF. The femtosecond pulses with 6nm bandwidth, 850fs pulse-width and high RF spectral purity of 80dB extinction ratio have been obtained.

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Tremblay, Gregoire. "Multispectral lidar data acquisition at 28 wavelengths on two types of aerosol cloud: getting relative spectral extinction efficiency and backscattering-to-extinction ratio." In Laser Radar Technology and Applications XXX, edited by Monte D. Turner, Gary W. Kamerman, and Lori A. Magruder. SPIE, 2025. https://doi.org/10.1117/12.3052777.

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Rosen, David L., and James B. Gillespie. "Atmospheric extinction effect on remote chemical sensing." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tuu8.

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Laser-induced fluorescence (LIF) is sometimes used for lidar because of the sensitivity of LIF spectra to chemical composition. Because of aerosols, background fluorescence, and quenching associated with the boundary layer, most LIF lidar studies have been restricted to simple gases above the troposphere. We performed a computer simulation to show the feasibility of applying UV fluorescence lidar to the chemical analysis of aerosols and hard targets in the troposphere. We applied factor analysisrank annihilation (FARA) techniques to a numerically generated excitation-emission matrix (EEM) of a

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Pallas-Quintela, Lara, Ángel Regueiro, Carlos Dafonte, Minia Manteiga, Raúl Santoveña, and Daniel Garabato. "Removing Reddening to Enhance Gaia's XP Spectra Clustering." In VII Congreso XoveTIC: impulsando el talento científico. Servizo de Publicacións. Universidade da Coruña, 2024. https://doi.org/10.17979/spudc.9788497498913.19.

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Reddening, or extinction, distorts stellar spectra due to dust between the source and the observer, in this case, the Gaia satellite. It shifts energy from the blue to the red part of a spectrum, potentially confusing hot, reddened stars with cooler ones, since the cooler the star, the higher the SED at the red part. Gaia currently provides 2D extinction values, which can lead to errors for nearby stars, where a 3D model would be ideal. Our research group clusters Gaia sources using SOM maps, taking into account only their XP spectra. To improve our results, we are developing AI methods to rem

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Eloranta, E. W., and P. Piironen. "High Spectral Resolution Lidar Measurements of Extinction and Particle Size in Clouds." In Optical Remote Sensing of the Atmosphere. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/orsa.1995.wa1.

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The spectral width of light backscattered from molecules is increased due to Doppler shifts caused by the thermal motion of the molecules. The thermal motion of aerosol and cloud particles is much slower and the backscatter spectrum is nearly unchanged. The University of Wisconsin High Spectral Resolution Lidar (HSRL) measures optical properties of the atmosphere by separating the Doppler-broadened molecular backscatter return from the unbroadened aerosol return1. The molecular backscatter cross section can be calculated from the molecular density profile. Thus, observing the magnitude of the

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Zhu, Qunzhi, Yongguang Li, Lijuan Mu, and Yun Cui. "Theoretical Investigation of Radiative Transport and Heat Transfer of Nanofluids in a Direct Solar Absorption Collector." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22554.

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Conversion of solar energy into heat is a common way to explore the clean and renewable energy source. Generally, a spectrally selective coating should be deposited to the solar-absorbing surface of the solar collector in order to reduce thermal loss emitted away from the surface in the form of thermal radiation. Nanofluids can be filled into a flat plate solar collector to absorb the solar radiation directly. The absorbance of the nanofluid in the solar spectrum may be tuned by various nanoparticles of different materials, sizes and mass fractions. In this paper, a theoretical investigation i

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Li, Yun, Xiaoyi Bao, Jeffrey Snoddy, and Liang Chen. "Brillouin spectrum narrowing in high extinction ratio nanosecond pulse from phase locked DFB lasers." In Photonics North 2009, edited by Réal Vallée. SPIE, 2009. http://dx.doi.org/10.1117/12.839204.

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XiHuang, Yu Zhang, YinZhang, Dexiu Huang, and xinliang Zhang. "Extinction ratio enhanced 80-Gbit/s wavelength conversion based on optimization of spectrum filtering." In 2009 14th OptoElectronics and Communications Conference (OECC). IEEE, 2009. http://dx.doi.org/10.1109/oecc.2009.5214430.

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Reports on the topic "Extinction spectrum"

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Gurton, Kristan P., David Ligon, and Rachid Dahmani. In Situ Measurement of the Infrared Spectral Extinction for Various Chemical, Biological, and Background Aerosols. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada419908.

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