Workshop on Hadronic Atoms

These are the proceedings of the workshop "HadAtom02", held at the CERN, October 14 - 15, 2002. The main topic of the workshop concerned the physics of hadronic atoms and in this contest recent results from experiments and theory were presented. These proceedings contain the list of participants, the scientific program and a short contribution from each speaker

Hyaluronic Acid Inhibits Polycation Induced Cellular Responses

Positively charged macromolecules cause a variety of pathological events through their electrostatic interaction with anionic sites present on the membrane of target cells. In the present study we have investigated the effect of hyaluronic acid, a negatively charged molecule, on rat paw oedema induced by poly-L-lysine as well as on histamine release from rat mast cells and nitric oxide formation from rabbit aorta, both induced by this polycation. The results indicate that hyaluronic acid is able to suppress these poly-L-lysine induced effects with a mechanism which possibly depends on its negative charges which may balance the effects of positively charged polycations

Is post orthognathic maxillary sinusitis related to sino-nasal anatomical alterations?

Le Fort I osteotomies have been used for more than five decades, but their impact on nasal and paranasal cavities physiology, has not been studied deeply. In this paper we want to analyse the possible correlation between post-orthognathic findings and prevalence of sinusitis which require surgical treatment. A retrospective cohort study was designed in 2017; the study was designed and carried out in the Verona University maxillo-facial department, a referral centre for orthognathic surgery. The study population is made of 64 patients that underwent orthognathic surgery (To treat class II or III malocclusion) between 2010 and 2015. Inclusion criteria were the availability of a Cone Beam Computed Tomography (CBCT) before surgery and one between 12 and 24 months after orthognathic surgery. Exclusion criteria were smoking habit and previous orthognathic procedures. During follow-up time prevalence of sinusitis was 18.5% and some patients required a secondary surgery to treat sinusitis. Surgery induced anatomic alterations were frequent in patients with sinusitis, sings and symptoms of sinusitis show positive correlation with anatomic alterations

All the colours of a film: study of the chromatic variation of movies

In this work, we discuss and present different techniques for film colour summarization together with a preliminary colorimetric study. The aim of this project is to combine the frames of different videos, reducing them to just one image of chromatic significance. This elaboration is made through two different methods: the movie barcodes and long exposure images. Due to their nature, those concise images have not only an artistical aim, but are movies chromatic synthesis that can eventually be used for colour checks and for identification of dominances. At first, we applied those methods on two videos from the Pixar Animation Studios\u2019 short animation movies. Then, as preliminary test, we present an application on the frames of a homemade video altered in different ways together with the relative visual and numerical results

Open issues in the study of human retina

This paper reports a concise survey on some characteristics of the human retina. The goal is to present some of the known parameters together with some open issues that still do not fit in the actual models of human vision. Colour and vision in general are still far from being well known mechanisms

Fidarsi o no del ColorChecker?

Il ColorChecker \ue8 uno strumento usato nel campo della fotografia digitale per eseguire una calibrazione cromatica. Il pannello composto da 24 tasselli a colori viene inserito all\u2019interno di una fotografia digitale per avere una acquisizione di valori di riferimento noti. L\u2019idea \ue8 quella che conoscendo i valori del ColorChecker e correggendo quelli relativi acquisiti si pu\uf2 calibrare cromaticamente tutta l\u2019immagine. L\u2019obiettivo di questo lavoro \ue8 testare i limiti e l\u2019affidabilit\ue0 dell\u2019uso del ColorChecker. A questo scopo sono state acquisite immagini fotografiche digitali a colori contenenti il ColorChecker a diverse condizioni di illuminazione e distanze dall\u2019obiettivo. Dopo aver corretto le immagini rispetto a un punto di bianco ottenuto dall\u2019apposito tassello del ColorChecker, \ue8 stata valutata la variabilit\ue0 dei tasselli colorati rispetto ai dati di fabbrica. Sono stati inoltre misurati il range dinamico relativo del ColorChecker e la linearit\ue0 dei valori di luminanza dei tasselli in scala di grigi rapportati ai valori corrispondenti dei dati di fabbrica

Work memories in super 8: the dawn of paper recycling in Brescia

This paper describes the digital acquisition and restoration of a documentary in Super 8 of the origins of citizen\u2019s awareness on paper recycling in Brescia, a city of Lombardy, northern Italy. This short movie has been shot in 1980 by ASM the public company which used to provide all the city supply (gas, water, electricity, district heating) and city transport. Now this film is part of the Fondazione ASM archive and its acquisition is part of a larger project of preservation of industrial memories in Italy. Here we describe the tools used for the acquisition and the technical choices done, together with the restoration test made. As well, we discuss the problems that one must face in trying to preserve a visual document of this kind from the unavoidable damage of time

First πK\pi K atom lifetime and πK\pi K scattering length measurements

The results of a search for hydrogen-like atoms consisting of $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence for $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic $\pi K$ pairs from their breakup in the same target ($178 \pm 49$) and from Coulomb final state interaction ($653 \pm 42$). Using these results the analysis yields a first value for the $\pi K$ atom lifetime of $\tau=(2.5_{-1.8}^{+3.0})$ fs and a first model-independent measurement of the S-wave isospin-odd $\pi K$ scattering length $\left|a_0^-\right|=\frac{1}{3}\left|a_{1/2}-a_{3/2}\right|= \left(0.11_{-0.04}^{+0.09} \right)M_{\pi}^{-1}$ ($a_I$ for isospin $I$).Comment: 14 pages, 8 figure