Optical code division multiple access (OCDMA) shows limitations in terms of the inefficient bandwidth utilization and low spectral density with one-dimensional (1D) codes. To overcome these limitations, a novel design is presented using two dimensional (2D) spectral/spatial multiwavelength coding scheme. The proposed constructed 1D balanced incomplete block (BIBD) technique. Theoretical analyti...

In this paper, we consider balanced ternary designs, BTDs, in which every block contains one element singly and the rest doubly. We call these packed BTDs, and we investigate three aspects of these designs: existence, nestings and signings. Construction methods generate classes of packed BTDs that are nested with balanced (BIBD) or partially balanced (PBIBD) incomplete block designs. Some of th...

The generation of balanced incomplete block designs (BIBD) is a hard constrained combinatorial problem whose applications are manifold. Although the BIBD problem can be easily formulated as a combinatorial optimization problem, its resolution still constitutes a formidable challenge for solving techniques. In this work we devise a memetic algorithm (MA) for tackling the BIBD problem. This MA fe...

The influence of two yeast strains and the addition copper sulphate on aroma Riesling wines was monitored. Two commercially available strains, Zymaflore VL3 X-Pure, were applied. General composition, volatile thiols, norisoprenoids, free terpenes, fermentation, sulphur compounds content determined, sensory attributes assessed by 22 tasters in a balanced incomplete block design (BIBD). produced ...

We prove three theorems giving extremal bounds on the incidence structures determined by subsets of the points and blocks of a balanced incomplete block design (BIBD). These results generalize and strengthen known bounds on the number of incidences between points and m-flats in affine geometries over finite fields. First, we show an upper bound on the number of incidences between sufficiently l...

Symmetric Balanced Incomplete Block Designs with λ=1 is a common class of BIBDs which are mostly used in incomplete experimental block design set up because their simplicity and also analysis. Over the years since development by Yates year 1939. A number research has been done on to establish properties determine construction methods design. In terms properties, studies have only able necessary...

We present a novel data organization for disk arrays|Segmented Information Dispersal (SID). SID provides protection against disk failures while ensuring that the reconstruction of the missing data requires only relatively small contiguous accesses to the available disks. SID has a number of properties that make it an attractive solution for fault-tolerant video servers. Under fault-free conditi...

We study the group test for DNA library screening based on probabilistic approach. Group test is a method of detecting a few positive items from among a large number of items, and has wide range of applications. In DNA library screening, positive item corresponds to the clone having a specified DNA segment, and it is necessary to identify and isolate the positive clones for compiling the librar...