249 research outputs found
A serologic survey of Helicobacter pylori infection in 3281 Italian patients endoscoped for upper gastrointestinal symptoms. The Italian Helicobacter Pylori Study Group.
No full textAIM: To assess the seroprevalence of Helicobacter pylori infection in a large series of patients with upper gastrointestinal symptoms referred for their first upper gastrointestinal endoscopy, and to evaluate any association with disease.
METHODS: A large survey of 3281 dyspeptic patients undergoing their first endoscopic examination was undertaken, involving 93 centres in Italy. A blood sample was taken from each participant, for measuring IgG antibodies against H. pylori using a commercially available kit, and two biopsies of the antral gastric mucosa were obtained for evaluating a Giemsa-stained specimen.
RESULTS: Endoscopic macroscopic diagnoses included normal mucosa (25.3%), gustroduodenitis (51.6%), gastric and duodenal ulcers (3.7 and 14.9%, respectively) and other conditions, including gastric cancer (0.8%). Overall, the seroprevalence result was 71.3% with a strong positive association with increasing age and male sex and a negative one with educational level. According to endoscopic diagnoses, the association with H. pylori seropositivity was highest for duodenal and gastric ulcer (multivariate odds ratio: 6.1 and 2.2) and lowest for carcinoma. The comparison between the results of serology and the single Giemsa-stained specimen showed good reliability of H. pylori IgG, particularly in a subgroup (n = 2056) for which the interpretation was performed by a single dedicated pathologist: sensitivity and specificity were 92 and 78%, respectively.
CONCLUSION: Commercial IgG serology is a reliable tool for the assessment of H. pylori infection in large-scale multicentre surveys. A very high seroprevalence among dyspeptic patients was confirmed, particularly in the presence of peptic disease. Factors associated with the infection were very similar to those usually reported in the general population, but male patients showed a significantly higher prevalence
On the Calogero-Moser space associated with dihedral groups
No full textInternational audienceUsing the geometry of the associated Calogero-Moser space, R. Rouquier and the author have attached to any finite complex reflection group several notions (Calogero-Moser left, right or two-sided cells, Calogero-Moser cellular characters), completing the notion of Calogero-Moser families defined by Gordon. If moreover is a Coxeter group, they conjectured that these notions coincide with the analogous notions defined using the Hecke algebra by Kazhdan and Lusztig (or Lusztig in the unequal parameters case). In the present paper, we aim to investigate these conjectures whenever is a dihedral group
Computational aspects of Calogero-Moser spaces
No full textInternational audienceWe present a series of algorithms for computing geometric and representationtheoretic invariants of Calogero-Moser spaces and rational Cherednik algebras associated with complex reflection groups. Especially, we are concerned with Calogero-Moser families (which correspond to the -fixed points of the Calogero-Moser space) and cellular characters (a proposed generalization by Rouquier and the first author of Lusztig's constructible characters based on a Galois covering of the Calogero-Moser space). To compute the former, we devised an algorithm for determining generators of the center of the rational Cherednik algebra (this algorithm has several further applications), and to compute the latter we developed an algorithmic approach to the construction of cellular characters via Gaudin operators. We have implemented all our algorithms in the Cherednik Algebra Magma Package (CHAMP) by the second author and used this to confirm open conjectures in several new cases. As an interesting application in birational geometry we are able to determine for many exceptional complex reflection groups the chamber decomposition of the movable cone of a Q-factorial terminalization (and thus the number of non-isomorphic relative minimal models) of the associated symplectic singularity
Computational aspects of Calogero-Moser spaces
No full textWe present a series of algorithms for computing geometric and
representation-theoretic invariants of Calogero-Moser spaces and rational
Cherednik algebras associated to complex reflection groups. Especially, we are
concerned with Calogero-Moser families (which correspond to the
-fixed points of the Calogero-Moser space) and cellular
characters (a proposed generalization by Rouquier and the first author of
Lusztig's constructible characters based on a Galois covering of the
Calogero-Moser space). To compute the former, we devised an algorithm for
determining generators of the center of the rational Cherednik algebra (this
algorithm has several further applications), and to compute the latter we
developed an algorithmic approach to the construction of cellular characters
via Gaudin operators. We have implemented all our algorithms in the Cherednik
Algebra Magma Package (CHAMP) by the second author and used this to confirm
open conjectures in several new cases. As an interesting application in
birational geometry we are able to determine for many exceptional complex
reflection groups the chamber decomposition of the movable cone of a
-factorial terminalization (and thus the number of non-isomorphic
relative minimal models) of the associated symplectic singularity.Comment: 42 page
sj-doc-1-tam-10.1177_17588359231156147 – Supplemental material for Clinical outcomes of volume of disease on patients receiving enzalutamide versus abiraterone acetate plus prednisone as first-line therapy for metastatic castration-resistant prostate cancer
No full textSupplemental material, sj-doc-1-tam-10.1177_17588359231156147 for Clinical outcomes of volume of disease on patients receiving enzalutamide versus abiraterone acetate plus prednisone as first-line therapy for metastatic castration-resistant prostate cancer by Pier Vitale Nuzzo, Francesco Ravera, Calogero Saieva, Elisa Zanardi, Giuseppe Fotia, Andrea Malgeri, Sabrina Rossetti, Loana Bueno Valença, Thiago Martins Oliveira, Charles Vauchier, Ricardo Pereira Mestre, Mikol Modesti, Anna Patrikidou, Sandro Pignata, Giuseppe Procopio, Giuseppe Fornarini, Ugo De Giorgi, Antonio Russo and Edoardo Francini in Therapeutic Advances in Medical Oncology</p
Classical hydrodynamics of Calogero-Sutherland models
No full textThe Calogero Sutherland model is system of particle moving on a line and interacting with long-range
forces. In this thesis we consider the classical case where the particles may or may not possess a spin degree of freedom. We demonstrate the intimate connection between the Calogero-Sutherland system and the Benjamin Ono equation. We then directly obtain a classical hydrodynamical limit of both the spineless and spinful Calogero system. The continuum limit of the spinless system is known to exhibit solition solutions.
We show numerically that the spinful system also exhibits localized solutions with the soliton property. This
is a strong evidence that the continuum spin-Calogero model is exactly integrable.Item withdrawn by Laura Spradlin ([email protected]) on 2014-07-21T22:07:40Z
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University of Illinois Theses & Dissertations (ID: 1)
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The impact of Western beauty ideals on the lives of women and men: A sociocultural perspective
No full textAccording to a recent survey of 3,300 girls and women across 10 countries, 90 per cent of all women aged 15 to 64 worldwide want to change at least one aspect of their physical appearance, with body weight ranking the highest (Etcoff, Orbach, Scott, & D’Agostino, 2004). This finding suggests that women’s anxiety about their appearance is a global phenomenon, observed in every country studied from Saudi Arabia to the United States. Beyond body dissatisfaction, a stunning 67 per cent of all women aged 15 to 64 worldwide reported that they actually withdraw from life-engaging, life-sustaining activities due to feeling badly about their looks. These activities include giving an opinion, meeting friends, exercising, going to work, going to school, dating, and going to the doctor
Two new solvable dynamical systems of goldfish type
No full textTwo new solvable dynamical systems of goldfish type are identified, as well as their isochronous variants. The equilibrium configurations of these isochronous variants are simply related to the zeros of appropriate Laguerre and Jacobi polynomials. © 2010 The Author(s)
Appunti per lo stucco «de marmoro» a Bologna nei primi decenni del Cinquecento (con un'ipotesi su Baldassarre Peruzzi)
No full textThis article examines the diffusion of the technique of stucco made of marble powder in Bologna in the first decades of the sixteenth century through unpublished documents. The author argues that architect Baldassarre Peruzzi played a crucial role in the diffusion of this technique in Northern Italy
Viterbo, the civic museum
No full textThe intervention can be delineated in two distinct, but cleary related stages: the first consist in the restoration of the monument by means of a series of solutions, the second is of an exhibitive character, in which the architectural poetic of the author is expressed, consisting of contemporary insertions. The exhibitive vocation of the objects is highlighted by the creation of supports with a minimal, plastic profile, with a distinct and clear tonality. The new architectural plan was realised with the aid of simple, white, circle-section metal, which envelop and present the paintings. The very chromatic schemata of the finishings of the surfaces, grey and blue, ease the reading of the paintings. Minissi had often proposed the suspended and transparent support, so as to offer the maximum visibility of the oeuvre to be examined while, at the same time, reducing to the bare necessities the supports "planted" on the ground in small environments
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