This paper deals with new infinite families of small dense sets in desarguesian projective planes PG(2, q). A general construction of dense sets of size about 3q2/3 is presented. Better results are obtained for specific values of q. In several cases, an improvement on the best known upper bound on the size of the smallest dense set in PG(2, q) is obtained.

A theorem of Green, Tao, and Ziegler can be stated (roughly) as follows: ifR is a pseudorandom set, andD is a dense subset of R, then D may be modeled by a set M that is dense in the entire domain such that D and M are indistinguishable. (The precise statement refers to“measures” or distributions rather than sets.) The proof of this theorem is very general, and it applies to notions of pseudora...

La innovación de procesos administrativos responde a uno los retos las empresas turismo comunitario para la conciliación entre organización comunitaria y el funcionamiento empresarial. El objetivo este estudio es analizar proceso implementación un sistema gestión calidad (SGC) en Ecotur Yahuiche S. P. R. I. desde enfoque gobernanza e interculturalidad. Se empleó metodología investigación acción...

A random dense countable set is characterized (in distribution) by independence and stationarity. Two examples are Brownian local minima and unordered infinite sample. They are identically distributed; the former ad hoc proof of this fact is now superseded by a general result. Introduction Random dense countable sets arise naturally from various probabilistic models. Their examination is impede...

The purpose of this paper is to introduce the concept and some fundamental properties of dense sets on bigeneralized topological spaces.

We show that all sufficiently nice λ-sets are countable dense homogeneous (CDH). From this fact we conclude that for every uncountable cardinal κ ≤ b there is a countable dense homogeneous metric space of size κ. Moreover, the existence of a meager in itself countable dense homogeneous metric space of size κ is equivalent to the existence of a λ-set of size κ. On the other hand, it is consisten...

The spread of a finite set of points is the ratio between the longest and shortest pairwise distances. We prove that the Delaunay triangulation of any set of n points in R3 with spread ∆ has complexity O(∆3). This bound is tight in the worst case for all ∆ = O( √ n). In particular, the Delaunay triangulation of any dense point set has linear complexity. We also generalize this upper bound to re...

Soluble guanylyl cyclase (sGC) is a cytosolic enzyme producing the intracellular messenger cyclic guanosine monophosphate (cGMP) on activation with nitric oxide (NO). sGC is an obligatory heterodimer composed of alpha and beta subunits. We investigated human beta1 sGC transcriptional regulation in BE2 human neuroblastoma cells. The 5' upstream region of the beta1 sGC gene was isolated and analy...

Nitric oxide (NO) has an important role in modulating the pulmonary vascular tone. NO acts, in part, by stimulating soluble guanylate cyclase (sGC) to synthesize the intracellular second messenger cyclic GMP. In vascular smooth muscle cells, sGC is a heterodimer composed of alpha1 and beta1 subunits. The objective of this study was to test whether oxygen concentration regulates sGC expression i...

Fungi have a plethora of chitinases, which can be phylogenetically divided into three subgroups (A, B and C). Subgroup C (sgC) chitinases are especially interesting due to their multiple carbohydrate-binding modules, but they have not been investigated in detail yet. In this study, we analyzed sgC chitinases in the mycoparasites Trichoderma atroviride and Trichoderma virens. The expression of s...