Fast radiative transfer using monochromatic look-up tables

Fast Computation of Monochromatic Infrared Atmospheric Transmittances Using Compressed Look-Up Tables

We present a new technique for the fast computation of near-monochromatic atmospheric transmittances in the infrared, utilizing compressed lookup tables, that is well suited for nadir viewing satellite and airplane observations. The algorithm is very simple to use in radiative transfer codes and is easily adapted to provide analytic Jacobians of radiances. A Singular Value Decomposition (SVD) i...

Fast multilevel radiative transfer

The vast majority of recent advances in the field of numerical radiative transfer relies on approximate operator methods better known in astrophysics as Accelerated Lambda-Iteration (ALI). A superior class of iterative schemes, in term of rates of convergence, such as Gauss-Seidel and Successive Overrelaxation methods were therefore quite naturally introduced in the field of radiative transfer ...

Digital Look Up Tables and Real Number

Rijndael FPGA Implementations Utilising Look-Up Tables

This paper presents single-chip FPGA Rijndael algorithm implementations of the Advanced Encryption Standard (AES) algorithm, Rijndael. In particular, the designs utilise look-up tables to implement the entire Rijndael Round function. A comparison is provided between these designs and similar existing implementations. Hardware implementations of encryption algorithms prove much faster than equiv...

Higher Order Masking of Look-Up Tables

We describe a new algorithm for masking look-up tables of block-ciphers at any order, as a countermeasure against side-channel attacks. Our technique is a generalization of the classical randomized table countermeasure against first-order attacks. We prove the security of our new algorithm against t-th order attacks in the usual Ishai-Sahai-Wagner model from Crypto 2003; we also improve the bou...