553 research outputs found
Materiales y tecnologías en la Arquitectura Modernista: casos de estudio de decoración de fachadas en Italia, Portugal y Polonia persiguiendo una restauración racional
The results of a diagnostic survey on the materials of representative Art Nouveau buildings in Italy, Portugal and Poland are here presented and compared, as a contribution to their understanding and, hence, to support compatible restoration. In particular, the facade decorations were investigated for the appraisal of their materials and technologies, often neglected in current maintenance/restoration works and so cancelled, leading to a severe loss in architectural image. The ongoing diagnostic campaign, in collaboration among different universities, is aimed to set up a database on materials and technologies of Art Nouveau facade decorations at a European scale, as a technical-scientific background for the highlighting of preservation guidelines
Advanced composite materials in precision machine tools sector - Applications and perspectives
The most recent R&D activities and applications of advanced materials for designing and fabrication of light and damped structures of precision machine tools (MT), are here presented. These new solutions include carbon fibres reinforced polymers (CFRP), hybrid sandwiches and novel multifunctional smart structures
Hybrid Simulation Safety: Limbos and Zero Crossings
Physical systems can be naturally modeled by combining continuous and
discrete models. Such hybrid models may simplify the modeling task of complex
system, as well as increase simulation performance. Moreover, modern simulation
engines can often efficiently generate simulation traces, but how do we know
that the simulation results are correct? If we detect an error, is the error in
the model or in the simulation itself? This paper discusses the problem of
simulation safety, with the focus on hybrid modeling and simulation. In
particular, two key aspects are studied: safe zero-crossing detection and
deterministic hybrid event handling. The problems and solutions are discussed
and partially implemented in Modelica and Ptolemy II
A rare Giant Killian-Jamieson diverticulum in a 97-year-old female. Considerations and multidisciplinary treatments in a symptomatic patient
The purpose of this publication is to describe the clinical and imaging findings of rare symptomatic giant Killian-Jamieson diverticulum (KJD) detected in a 97-year-old female patient and discuss diagnostic and therapeutic protocols to be implemented. The clinical history began implementing anamnesis and physical examination, followed by laryngoscopy, esophagogastroduodenoscopy, sonographic examination and subsequently a double-contrast pharyngoesophagram evaluations, to our symptomatic old patient with results of typically KJD, with maximal dimension of 5 cm. The KJD was successfully treated with a surgical approach, esophagomyotomy in addition to a diverticulopexy; these techniques were used for adequate visualization of the tissue bridge of the diverticulum and protection of the surrounding tissue during dissection of the tissue bridge. Our patient has benefit from the operation immediately, with resolution of the disease. The follow-up (on-going), up to now, showed no recurrence of the pathological and no complications, making sure the authors of the efficacy of the surgical treatment. According to the authors the surgical treatment was the only procedure to cure the patients and, to date, our successful experience suggests that only surgical approach can be a safe and effective method for the treatment of symptomatic giant KJD, due to its close proximity to the recurrent laryngeal nerve and the concern of possible nerve injury
Computing automorphic forms on Shimura curves over fields with arbitrary class number
We extend methods of Greenberg and the author to compute in the cohomology of
a Shimura curve defined over a totally real field with arbitrary class number.
Via the Jacquet-Langlands correspondence, we thereby compute systems of Hecke
eigenvalues associated to Hilbert modular forms of arbitrary level over a
totally real field of odd degree. We conclude with two examples which
illustrate the effectiveness of our algorithms.Comment: 15 pages; final submission to ANTS I
Exhaled nitric oxide in patients with PiZZ Phenotype-related α 1-anti-trypsin deficiency
AbstractThere is no report of exhaled NO (eNO) in subjects with different phenotypes ofα1 -anti-trypsin (AAT) deficiency.Exhaled nitric oxide was evaluated by means of single-breath chemiluminescence analysis (fractional exhaled concentration at the plateau level [plFENO]) in 40 patients with AAT deficiency. Patients were divided according to the protease inhibitor (Pi) phenotype: PiMZ/MS, n=25; PiSZ n=6; PiZZ, n=9. Nineteen healthy subjects served as controls. Levels of eNO in PiZZ patients were also compared with those of subjects, without AAT deficiency (PiMM), matched for diagnosis, sex, age, smoking habit and forced expiratory volume in 1 sec (FEV1). In AAT deficiency subjects airway hyper-responsiveness to methacholine (PD20FEV1) was also assessed.plFENOwas significantly lower in the PiZZ group (4·5±1·4 ppb) than in matched PiMM subjects (8·2±3·8 ppb), in healthy controls (9·3±2·8 ppb) and in patients of other phenotypes. Dynamic lung volumes and DLCOwere significantly lower in PiZZ than in other AAT-deficient patients. Bronchial hyper-responsiveness was not different among AAT phenotypes.These results suggest that eNO may be significantly reduced in PiZZ as compared to healthy control subjects and to AAT subjects with other phenotypes, independent of the level of airway obstruction. Whether, at least potentially, eNO may be considered as an early marker of lung involvement in AAT deficiency must be confirmed with studies on larger number of subjects
Zn-doped titania nanoparticles as building blocks for solid foam filters of water and air via photocatalytic oxidation
Photocatalytic oxidation (PCO) could provide energy-efficient purification of water and air. Its efficacy is constrained mainly by limited photocatalytic activity and active surface. To address both, solid foams with hierarchic porous structures spanning multiple length-scales, stabilized by photocatalytic Zn-doped titania nanoparticles (NP) were synthesized and tested. The NP were characterized by SEM, EDS, DLS, XRD, Raman and UV–Vis spectroscopies. Solid foams were stabilized by NP complexes with cationic surfactants. The foam morphology was characterized and photocatalytic activity was demonstrated in water. The present work paves the way for the development of efficient systems for air and water purification in demanding technological sectors, such as aerospace
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