Results 11 to 20 of about 1,218,779 (86)
Solution of Ambartsumian Delay Differential Equation in the q-Calculus [PDF]
International Journal of Analysis and Applications, 2020 The Ambartsumian equation in view of the q-calculus is investigated in this paper. This equation is of practical interest in the theory of surface brightness in the Milky Way. Two approaches are applied to obtain the closed form solution.
Abdulaziz M. Alanazi, Abdelhalim Ebaid
doaj +2 more sources
Iterative methods of Ambartsumian equations’ solutions. Part 2
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022 Background. Ambartsumian equation and its generalizations are one of the main integral equations of astrophysics, which have found wide application in many areas of physics and technology.
I.V. Boykov, A.A. Pivkina
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Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models. [PDF]
J Adv Model Earth Syst, 2019 Abstract This paper describes the initial implementation of a new toolbox that seeks to balance accuracy, efficiency, and flexibility in radiation calculations for dynamical models. The toolbox consists of two related code bases: Radiative Transfer for Energetics (RTE), which computes fluxes given a radiative transfer problem defined in terms of ...
Pincus R, Mlawer EJ, Delamere JS.
europepmc +2 more sources
On the generalized Jacobi equation. [PDF]
, 2008 The standard text-book Jacobi equation (equation of geodesic deviation) arises by linearizing the geodesic equation around some chosen geodesic, where the linearization is done with respect to the coordinates and the velocities.
Perlick, Volker
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Iterative methods for solving Ambartsumian’s equations. Part 1
University proceedings. Volga region. Physical and mathematical sciences, 2021 Background. Ambartsumian’s equation and its generalizations are one of the main integral equations of astrophysics, which have found wide application in many areas of physics and technology. An analytical solution to this equation is currently unknown, and the development of approximate methods is urgent.
I.V. Boykov, A.A. Shaldaeva
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Journal of Geophysical Research: Biogeosciences, Volume 128, Issue 6, June 2023., 2023 Abstract To understand surface biogeophysical processes, accurately evaluating the geographical and temporal fluctuations of soil moisture is crucial. It is well known that the surface soil moisture content (SMC) affects soil reflectance at all solar spectrum wavelengths.
Nayma Binte Nur, Charles M. Bachmann
wiley +1 more source
Simulated Lunar Surface Hydration Measurements Using Multispectral Lidar at 3 µm
Earth and Space Science, Volume 9, Issue 8, August 2022., 2022 Abstract Accurately measuring the variability of spectroscopic signatures of hydration (H2O + OH) on the illuminated lunar surface at 3 μm as a function of latitude, lunar time of day, and composition is crucial to determining the generation and destruction mechanisms of OH species and understanding the global water cycle.
D. R. Cremons, C. I. Honniball
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Visible to Mid‐Infrared Optical Constants of Orthopyroxenes
Earth and Space Science, Volume 9, Issue 4, April 2022., 2022 Abstract Radiative transfer models of remotely acquired infrared spectra result in quantitative identification of minerals on planetary surfaces. Optical constants, or the real (n) and imaginary (k) indices of refraction are necessary inputs in such models.
Melinda J. Rucks +5 more
wiley +1 more source
Animal models of pulmonary hypertension: Getting to the heart of the problem
British Journal of Pharmacology, Volume 179, Issue 5, Page 811-837, March 2022., 2022 Despite recent therapeutic advances, pulmonary hypertension (PH) remains a fatal disease due to the development of right ventricular (RV) failure. At present, no treatments targeted at the right ventricle are available, and RV function is not widely considered in the preclinical assessment of new therapeutics.
Joshua P. Dignam +3 more
wiley +1 more source
Unmixing Mineral Abundance and Mg# With Radiative Transfer Theory: Modeling and Applications
Journal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021 Abstract Mineral abundance and Mg# (100× molar Mg/(Mg + Fe)) are significant in understanding the crustal composition and thermal history of the Moon. In this study, we derive a new set of optical constants for olivine, orthopyroxene, and clinopyroxene using radiative transfer equations that include soil porosity and the opposition effect. Based on the
Lingzhi Sun, Paul G. Lucey
wiley +1 more source