807 research outputs found

    On the Convergence of the Born Series in Optical Tomography with Diffuse Light

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    We provide a simple sufficient condition for convergence of Born series in the forward problem of optical diffusion tomography. The condition does not depend on the shape or spatial extent of the inhomogeneity but only on its amplitude.Comment: 23 pages, 7 figures, submitted to Inverse Problem

    Poverty and the Environment: A Symbiotic Disaster

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    This presentation focuses on the dual impact that poverty and the environment not only has on each other, but the entire planet around them. There are many factors at play in these issues, stretching all the way from pure wealth to the usage of natural land. A discussion of how people must band together to see a significant change will take place, and that it first takes realizing the issues to make a difference. By exploring the different realms of each respective problem, this project aims to broaden the scope of listeners to the truly larger issues surrounding us now.https://stars.library.ucf.edu/hip-2023fall/1087/thumbnail.jp

    Theory of Electron-Phonon Dynamics in Insulating Nanoparticles

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    We discuss the rich vibrational dynamics of nanometer-scale semiconducting and insulating crystals as probed by localized electronic impurity states, with an emphasis on nanoparticles that are only weakly coupled to their environment. Two principal regimes of electron-phonon dynamics are distinguished, and a brief survey of vibrational-mode broadening mechanisms is presented. Recent work on the effects of mechanical interaction with the environment is discussed.Comment: Revte

    Single-Scattering Optical Tomography: Simultaneous Reconstruction of Scattering and Absorption

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    We demonstrate that simultaneous reconstruction of scattering and absorption of a mesoscopic system using angularly-resolved measurements of scattered light intensity is possible. Image reconstruction is realized based on the algebraic inversion of a generalized Radon transform relating the scattering and absorption coefficients of the medium to the measured light intensity and derived using the single-scattering approximation to the radiative transport equation.Comment: This is a sequel to physics/070311
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