Quantum Google in a complex network.

We investigate the behaviour of the recently proposed Quantum PageRank algorithm, in large complex networks. We find that the algorithm is able to univocally reveal the underlying topology of the network and to identify and order the most relevant nodes. Furthermore, it is capable to clearly highlight the structure of secondary hubs and to resolve the degeneracy in importance of the low lying part of the list of rankings.

Google in a quantum network.

We introduce the characterization of a class of quantum PageRank algorithms in a scenario in which some kind of quantum network is realizable out of the current classical internet web, but no quantum computer is yet available. This class represents a quantization of the PageRank protocol currently employed to list web pages according to their importance. We have found an instance of this class of quantum protocols that outperforms its classical counterpart and may break the classical hierarchy of web pages depending on the topology of the web.

Helicobacter pylori infection and gastric function in patients with fundic atrophic gastritis.

In the present study we evaluated the relation among histology, H. pylori, IgG to H. pylori, gastric emptying, and acid secretion in 43 patients with fundic atrophic gastritis.

Gastric emptying and dyspeptic symptoms in patients with nonautoimmune fundic atrophic gastritis.

Our aim was to evaluate the relationship between gastric emptying and demographic, clinical, histological, and secretory features in patients with nonautoimmune fundic atrophic gastritis. Only 31% of 45 patients with fundic atrophic gastritis presented with achlorhydria. Scintigraphic gastric emptying of solids was delayed compared to healthy controls.

Reversal of fundic atrophy after eradication of Helicobacter pylori.

Objectives: We sought to evaluate the effect of Helicobacter pylori eradication in patients with fundic atrophic gastritis.

Methods: Acid secretion, gastric emptying, and histology were evaluated in 20 patients with fundic atrophic gastritis and H. pylori infection.