Due to turbulence and tracking errors, free-space optical channels involving mobile transceivers are characterized by a signal's partial loss or complete erasure. This work presents an error-correction protocol capable of protecting signal passing through such encoding it with ancillary entangled bipartite state. Beyond its ability offer protection under realistic channel conditions, our has th...

Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose new shaper architecture decrease EDI of transmitted and thus, increase signal-to-noise ratio (SNR). We call list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM con...

In this paper, we mainly establish a congruence for sum involving Apéry numbers, which was conjectured by Z.-W. Sun. Namely, any prime p &gt; 3 <mml:annotation encoding="applicat...

Ordet »symbol« har rod i det græske symballein, hvor sym betyder »sammen« og ballein »kaste« eller »føje« altså »sammenføje«. 1 Herudfra kan ordet tillægges en videre betydning, som skal tages op denne artikel: At føje adskilte sammen, så fuldt ud virkelige bliver nærværende et udtryk. livsverdenen vil der ofte mangle intenst ægte virkelighedsnærvær. Tingene, menneskene, andre levende væsener; ...

Today, more and more DNA sequences are becoming available. The information about DNA sequences are stored in molecular biology databases. The size and importance of these databases will be bigger and bigger in the future, therefore this information must be stored or communicated efficiently. Furthermore, sequence compression can be used to define similarities between biological sequences. The s...