SUMMARY In recent years, with the rapid growth of the In-ternet as well as the increasing demand for broadband services, live pay-television broadcasting via the Internet has become a promising business. To get this implemented, it is necessary to protect distributed contents from illegal copying and redistributing after they are accessed. Fingerprinting system is a useful tool for it. This pap...

A Kirkman triple system of order v, whose point set is consecutively numbered, is called smooth, if for each parallel class there is a number d, such that each triple of the parallel class forms an arithmetic progression modulo v with common difference d. It will be shown that smooth Kirkman triple systems of order v exist, if and only if v is a power of 3. 1 Smooth Kirkman triple systems The f...

In recent years, with the rapid growth of the Internet as well as the increasing demand for broadband services, live pay-television broadcasting via internet has become a promising business. To get this implemented, it is necessary to protect distributed contents from illegal copying and redistributing after they are accessed. Fingerprinting system is a useful tool for it. This paper shows that...

We present techniques used in the implementation of an efficient constraint program for the portfolio optimization (PO) problem. This important combinatorial problem in the credit derivatives market arises for example when constructing synthetic collateralized debt obligations (CDOs) squared. A close relationship with the balanced incomplete block design (BIBD) problem exists which we make use ...

Digital fingerprinting is a technique for identifying unauthorized copy and tracing back to its user. The distributor marks each individual copy with a unique fingerprint. The present fingerprinting schemes generally have many difficulties and disadvantages in the case of large-size users. In this paper, we present a new fingerprint scheme which can be used in confidential departments where the...

One of the main shortfall Balanced Incomplete Block Designs is that design not available for all parameter sets. Thus, some sets satisfy necessary conditions BIBD cannot be constructed as such. This means designs possible to with a single association scheme (λ). Given structural difference exist between and PBIBD later do have but rather m schemes, study believed if could associations then mayb...

Incomplete Block Designs were introduced by Yates (1936) with a restriction on the block size that all treatments are not present in blocks k < v, which eliminating heterogeneity to greater extent when number of is large. Several researchers made attempts existence and constructions This paper presents new series construction Balanced Design using Partially incomplete Designs.