It is shown that good linear ~n ,k ,d] codes over a finite field GF (q) can be constructed by concatenating the generator matrices of Reed-Solomon codes. For the first interesting case of k = 3, it is shown that many of the codes obtained via projective geometry tecqniques can readily be obtained via the proposed algebraic approach. ) 0 T ec hn io n C om pu te r Sc ie nc e D ep ar tm en t T eh ...

Methods We performed a population-based study of ED visits for COPD using state-wide surveillance data from NC DETECT[4], including all ED visits made by NC residents aged ≥45 years in 2008-2009. Visits were considered COPD-related if the firstor second-listed discharge diagnoses contained one of the following ICD-9-CM codes: 491.*, 492.*, 493.2*, 494.*, or 496.*. Hospital admissions were captu...

Over the last 50 years, conventional programming of the numerical controlled (NC) machine tools has been based on a data model stipulated by ISO 6983, or otherwise known as G-codes. It was designed to sequentially pass instructions to the controls of machine tools with little, if any, intelligence. It has been realized that this standard has led to serious impediments for the fulfilment of tota...

We explore the connection between public-coin interactive proof systems with logspace veriiers and NC using two diierent approaches. In the rst approach, we describe an interactive proof system for accepting any language in NC after a logspace reduction, where the veriier is logspace-bounded and the protocol requires polylog time. These results are proved by describing NC computations as comput...

As a high-quality building material exhibiting excellent toughness and durability, ultrahigh-performance concrete (UHPC) is increasingly being used in the construction industry as reinforcement. During reinforcement of existing structures with UHPC, their interface weakest part structure. Interface bonding ensures operation two types materials together. However, studies rarely report UHPC–norma...

Network coding (NC) is a novel coding technology that can be seen as a generalization of classic point-to-point coding. As with classic coding, both information theoretical and algebraic views bring different and complementary insights of NC benefits and corresponding tradeoffs. However, the multiuser nature of NC and its inherent applicability across all layers of the protocol stack, call for ...

| For practical communications which transmit nite blocks of source data over noisy channels, we question the common practice to compress (C) the source and then to add redundancy for error control. Rather we exploit the redundancy of the non-compressed source (NC) at the channel decoder by source-controlled channel decoding. For a simple binary Markov source and a Rayleigh fading channel we si...

The Fermilab photoinjector produces electron bunches of 1–12 nC charge with an energy of 16–18 MeV. Detailed measurements and optimization of the transverse emittance have been carried out for a number of beam line optics conditions, and at a number of beam line locations. The length of the bunches has also been measured, first for an uncompressed beam (as a function of the charge) and then for...