In this paper we study polycyclic codes of length p1 × · · · × pn over Fpa generated by a single monomial. These codes form a special class of abelian codes. We show that these codes arise from the product of certain single variable codes and we determine their minimum Hamming distance. Finally we extend the results of Massey et. al. in [10] on the weight retaining property of monomials in one ...

We present a methodology of an on-line variable-length binary encoding of a set of integers. The basic principle of this methodology is to maintain the preex property amongst the codes assigned on-line to a set of integers growing dynamically. The preex property enables unique decoding of a string of elements from this set. To show the utility of this on-line variable length binary encoding, we...

Speech is time variable stochastic process. But the HMM model is stationary and time-independent. We present a new model as Hidden Dynamic HMM model to describe the dynamic property of speech. A hidden layer of dynamic property is interpolated between the observation and state. Estimated Dynamic Property and Predicted Dynamic Property is introduced to describe the hidden dynamic property. The r...

A natural framework for real-time specification is monadic first-order logic over the structure (R, <,+1)—the ordered real line with unary +1 function. Our main result is that (R, <,+1) has the 3-variable property: every monadic first-order formula with at most 3 free variables is equivalent over this structure to one that uses 3 variables in total. As a corollary we obtain also the 3-variable ...

Acyclic directed mixed graphs, also known as semi-Markov models represent the conditional independence structure induced on an observed margin by a DAG model with latent variables. In this paper we present a factorization criterion for these models that is equivalent to the global Markov property given by (the natural extension of) dseparation.

This study investigates the firm level determinants of profitability of Indian drug and pharmaceutical industry. The study uses inflation adjusted panel data for a period 2000-2013 and applies OLS regression model with Driscoll-Kraay standard errors. It has been found that export intensity, A&M intensity, firm’s market power and stronger patent regime dummy have exercised positive influence on ...

Directed acyclic graph (DAG) models may be characterized in four different ways: via a factorization, the dseparation criterion, the moralization criterion, and the local Markov property. As pointed out by Robins [2, 1], Verma and Pearl [6], and Tian and Pearl [5], marginals of DAG models also imply equality constraints that are not conditional independences. The well-known ‘Verma constraint’ i...