Application of covering codes to data embedding improves embedding efficiency and security of steganographic schemes. In this paper, we describe several familes of covering codes constructed using the blockwise direct sum of factorizations. We show that non-linear constructions offer better performance compared to simple linear covering codes currently used by steganographers. Implementation de...

In this paper, we first study the error correction and detection capability of codes for a general transmission system inspired by network error correction. For a given weight measure on the error vectors, we define a corresponding minimum weight decoder. Then we obtain a complete characterization of the capability of a code for 1) error correction; 2) error detection; and 3) joint error correc...

A general-purpose three-dimensional (3D) simulation code IBSIMU for charged particle optics with space charge is under development at JYFL. The code was originally developed for designing a slit-beam plasma extraction and nanosecond scale chopping for pulsed neutron generator, but has been developed further and has been used for many applications. The code features a nonlinear FDM Poisson's equ...

Batched sparse (BATS) code is a promising technology for reliable data transmission in multi-hop wireless networks. As a BATS code consists of an outer code and an inner code that typically is a random linear network code, one main research topic for BATS codes is to design an inner code with good performance in transmission efficiency and complexity. In this paper, this issue is addressed with...

We propose an efficient technique for the detection of errors in cryptographic circuits introduced by strong adversaries. Previously a number of linear and nonlinear error detection schemes were proposed. Linear codes provide protection only against primitive adversaries which no longer represents practice. On the other hand nonlinear codes provide protection against strong adversaries, but at ...

The assessment of seismic performance of existing structures is becoming an important problem in earthquake engineering. Some important ructures are considerably old and, therefore, their strengths and ductilities are less than strength and ductility demands because of changes in codes and design methodologies. Such structures must be strengthened to resist future earthquakes. First, a structur...

High-fidelity modeling of nuclear reactors requires the solution of nonlinear coupled multi-physics stiff problems with widely varying time and length scales that need to be resolved correctly. A numerical method that converges the implicit nonlinear terms to a small tolerance is often referred to as nonlinearly consistent (or tightly coupled). This nonlinear consistency is still lacking in the...

Orthogonal Frequency Division Multiplexing (OFDM) is a very attractive modulation scheme for data transmission in multipath channels. But the high Peak-to-MEan Power Ratio (PMEPR) of the modulated signal is a major drawback and makes the use of some circuits very tricky : for instance, power amplifiers at the emission side could have nonlinear characteristics and a high PMEPR could exhibits int...

Code generation plays an important role in computational science and engineering, and has been used successfully in optimization to compute derivatives from automatic differentiation. The present paper describes a system for code generation that can be used in dynamical parameter estimation problems. The python scripts require text input that describe the model in a few hundred lines of code wh...