Two sufficient conditions are given for the existence of binary fix-free codes. The results move closer to the Ahlswede-Balkenhol-Khachatrian conjecture that Kraft sums of at most 3=4 suffice for the existence of fix-free codes. For each nonnegative integer n let f0; 1gn denote the set of all binary words of length n, and let f0; 1g denote the set of all finite length binary words, including th...

Bacillus subtilis, locally isolated, produced significant level of xylanase activity in the presence of different carbon sources. However, B. subtilis performed well when grown on pretreated natural substrates such as rice straw, wheat straw, bagasse, wheat bran and kraft pulp at 2% concentration. The organism produced higher level of xylanasse activity when bagasse was used as a carbon source ...

Kraft's inequality [9] is essential for the classical theory of noiseless coding [1, 8]. In algorithmic information theory [5, 7, 2] one needs an extension of Kraft's condition from nite sets to (in nite) recursively enumerable sets. This extension, known as Kraft-Chaitin Theorem, was obtained by Chaitin in his seminal paper [4] (see also, [3, 2]). The aim of this note is to o er a simpler proo...

To assess the feasibility of implementing hemicellulose recovery stages in kraft mills, Eucalyptus globulus wood samples were subjected to aqueous treatments with hot, compressed water (autohydrolysis processing) to achieve partial dissolution of xylan. Autohydrolyzed solids were subjected to kraft pulping under selected conditions to yield a pulp of low kappa number, and to an optimized TCF bl...

The pulp and paper industry is applying new, ecologically sound technology in its manufacturing processes. Many interesting enzymatic applications have been proposed in the literature. Implemented technologies tend to change the existing industrial process as little as possible. Commercial .applications include xylanases in prebleaching kraft pulps and various enzymes in recycling paper. In the...

a Virginia Tech Dept. of Aerospace and Ocean Engineering, 215 Randolph Hall Blacksburg, VA 24061, United States, [email protected] (Corresponding Author) b Virginia Tech Dept. of Aerospace and Ocean Engineering, 215 Randolph Hall Blacksburg, VA 24061, United States, [email protected] c Virginia Tech Dept. of Computer Science, 2202 Kraft Drive Blacksburg, VA 24060, United States, [email protected] ...