منابع مشابه
Influence of Molecular Weight and Degree of Deacetylation of Low Molecular Weight Chitosan on the Bioactivity of Oral Insulin Preparations
The objective of the present study was to prepare and characterize low molecular weight chitosan (LMWC) with different molecular weight and degrees of deacetylation (DDA) and to optimize their use in oral insulin nano delivery systems. Water in oil nanosized systems containing LMWC-insulin polyelectrolyte complexes were constructed and their ability to reduce blood glucose was assessed in vivo ...
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We consider a facility location problem, where the objective is to “disperse” a number of facilities, i.e., select a given number k of locations from a discrete set of n candidates, such that the average distance between selected locations is maximized. In particular, we present algorithmic results for the case where vertices are represented by points in d-dimensional space, and edge weights co...
متن کاملMaximum-weight-basis preconditioners
This paper analyzes a novel method for constructing preconditioners for diagonally-dominant symmetric positivedefinite matrices. The method discussed here is based on a simple idea: we construct M by simply dropping offdiagonal nonzeros from A and modifying the diagonal elements to maintain a certain row-sum property. The preconditioners are extensions of Vaidya’s augmented maximum-spanning-tre...
متن کاملMaximum Weight Spectrum Codes
In the recent work [7], a combinatorial problem concerning linear codes over a finite field Fq was introduced. In that work the authors studied the weight set of an [n, k]q linear code, that is the set of non-zero distinct Hamming weights, showing that its cardinality is upper bounded by q −1 q−1 . They showed that this bound was sharp in the case q = 2, and in the case k = 2. They conjectured ...
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ژورنال
عنوان ژورنال: Nature
سال: 1952
ISSN: 0028-0836,1476-4687
DOI: 10.1038/170210a0