Given a formal power series g(x) = b0 +b1x+b2x2 +··· and a nonunit f(x) = a1x+ a2x2+··· , it is well known that the composition of g with f , g(f(x)), is a formal power series. If the formal power series f above is not a nonunit, that is, the constant term of f is not zero, the existence of the composition g(f(x)) has been an open problem for many years. The recent development investigated the ...

The base composition of DNA was determined for individual chromosomes from the dipteran Chironomus tentans and for each one of six different segments of one of the chromosomes. The isolations were carried out by micromanipulation and the DNA purines were first extracted from the isolated components and afterwards separated by means of microelectrophoresis on a cellulose fiber. It was found that...

In this paper, we study the model of stochastic timed automata and we target the definition of adequate composition operators that will allow a compositional approach to the design of stochastic systems with hard real-time constraints. This paper achieves the first step towards that goal. Firstly, we define a parallel composition operator that (we prove) corresponds to the interleaving semantic...

Why these axioms? The symmetries of a given object form a group under composition, and the axioms capture the general properties of such a composition law. Any object has at least one symmetry, namely the identity transformation, which does nothing at all. Any symmetry of a given object can be undone or reversed, whence the existence of inverses. Associativity is the most subtle condition: it s...

in order to improving suitable growing condition for cultured species, knowledge of energy yieldingnutrients, especially information about carbohydrate requirement are of oriental river prawn isessential, since there is not exclusive studies about carbohydrate requirement about this species, hencean nutritional experiments was conduct in order to find out the optimum level of carbohydrate. five...

in this study, the effect of garlic extract on the growth performances ( body weight increase (bwi), specific growth rate (sgr), condition factor (cf), final length (fl) and weight (fw)), feed indices (feed conversion rate (fcr), protein efficiency ratio (per), protein production ratio (ppr)) and body composition (protein, fat, moisture and ash) of mugil cephalus larvae were studied in four tre...

conclusions independent of the training sequence, an 8-week concurrent training program caused positive changes in the body composition and physical fitness of our aged female subjects. however, there was no benefit derived from sequence order training. results the intra-session sequence order did not influence the adaptive response of the waist-to-hip ratio (p = 0.55), body fat percentage (bf ...

Tagetes minuta L. belongs to Asteracea family it is an annual species native of South American, although it has become widespread throughout the world. This species is especially well adapted to disturbed habitats. Tagetes minuta oil found a good market in perfumery and flavour industry. Many studies on Tagetes minuta have reported that the composition of exteracted volatile components varied a...