13,079 research outputs found
18th Congress of Unione Matematica Italiana (Bari, September 24 – 29, 2007),
No full textLa cerimonia inaugurale del XVIII Congresso Nazionale dell’Unione Matematica Italiana ha avuto luogo lunedì 24 settembre 2007 presso l’Aula Magna del Politecnico di Bari, Campus Universitario.
Sono intervenuti, nell’ordine, il Magnifico Rettore del Politecnicodi Bari, Salvatore Marzano, il Magnifico Rettore dell’Università degli Studi di Bari, Corrado Petrocelli, il Presidente dell’Istituto Nazionale di Alta Matematica (INdAM), Vincenzo Ancona, il Presidente della Conferenza dei Rettori delle Università Italiane (CRUI), Guido Trombetti, il Presidente della Giunta Regionale Pugliese, Nichi Vendola, il Dr. Marco Bronzini in rappresentanza del Sindaco del Comune di Bari, il Presidente del Gruppo di Lavoro Interministeriale per lo Sviluppo della Cultura Scientifica e Tecnologica, Luigi Berlinguer, il Sottosegretario al Ministero dell’Università e della Ricerca, Luciano Modica.
La cerimonia, coordinata da Michele Pertichino, si è aperta con i discorsi del Presidente del Comitato Organizzatore, Francesco Altomare, e del Presidente dell’UMI, Franco Brezzi. Si sono poi succeduti gli interventi dei Presidenti dell’AILA (Associazione Italiana di Logica ed Applicazioni), Carlo Toffalori, dell’AIRO (Associazione Italiana di Ricerca Operativa), Renato De Leone, dell’AMASES (Associazione Matematica Applicata alle Scienze Economiche e Sociali), Flavio Pressacco il cui saluto è stato letto da Lucia Maddalena, della MATHESIS (Società Italiana di Scienze Matematiche e Fisiche), Antonio Laforgia, e della SIMAI (Società Italiana di Matematica Applicata ed Industriale), Mario Primicerio.
La seduta inaugurale si è conclusa con la consegna dei Premi Bartolozzi, Caccioppoli, Fichera e Vinti a valenti matematici italiani che si sono contraddistinti in ambito internazionale per le loro ricerche in vari settori della Matematica
Functional Analysis and Approximation Theory III, Proceedings of the 3rd International Conference on Functional Analysis and Approximation Theory held in Acquafredda di Maratea (Potenza), September 23 - 28, 1996
No full textDuring the week of September 23 - 28, 1996, the Third
International Conference on Functional Analysis and Approximation
Theory was held at Acquafredda di Maratea (Potenza). Earlier meetings
were held on 1989 and 1992 at the same place.
The Conference was organized by the Center for Studies on
Functional Analysis and Approximation Theory of the University of
Basilicata (Potenza), which is directed by Prof. G. Mastroianni, with
the collaboration of the Departments of Mathematics of the Universities
of Basilicata and Bari and the Institute for Applications of
Mathematics (C.N.R.) of Napoli.
The executive organizing committee was made, other than by
Giuseppe Mastroianni, also by Francesco Altomare, Michele Campiti,
Giuliana Criscuolo and Bianca Maria Della Vecchia.
The main aim of the Conference was to promote interactions
between specialists and young researchers from functional analysis and
approximation theory as well as to renew some stimuli in solving
various open problems arising from these fields and in showing
applications to other fields of Mathematics which are closer to the
applied sciences.
The Conference was attended by over 190 mathematicians from 27
countries. The programme included 13 invited lectures and over 140
research talks.
The main topics that were treated include
- Banach spaces, Banach algebras, Fr‚chet spaces, approximation in
normed spaces.
- Function spaces and approximation problems.
- Linear operators on Banach spaces, ergodic theory, positive operators
- Semigroups of operators, Feller semigroups, partial differential
equations.
- Real functions and inequalities. Complex approximation.
- Approximation by positive operators. Rate of convergence.
- Orthogonal polynomials.
- Integral equations.
- Interpolation and quadrature formulas.
- Integral transforms and Fourier series.
- Wawelets.
- Numerical analysis and boundary element methods.
In this volume we collected some invited lectures together with
a selection of the papers corresponding to the research talks and which
have been properly refereed. Our thanks go to the referees for their
collaboration as well as their accurate work.
We gratefully acknowledge the financial support by
- Universit... della Basilicata.
- Consiglio Nazionale delle Ricerche - Comitato per la Matematica.
- Dipartimento di Matematica dell'Universit... della Basilicata.
- Dipartimento di Matematica dell'Universit... di Bari.
- Gruppo di ricerca "Analisi Funzionale" - M.U.R.S.T. 40 %
- Istituto per Applicazioni della Matematica (C.N.R.) di Napoli.
- Azienda Autonoma Soggiorno e Turismo - Maratea.
We are particularly indebted to Ingrid Carbone, Maria Carmela De
Bonis, Italia De Feis, Sabrina Diomede, Nicola Mastronardi, Donatella
Occorsio, Marco Romito, Maria Grazia Russo and Woula Themistoclakis,
who assisted and helped us to operate the Conference secretariat. To
all of them we express our special thanks.
Finally we would like to thank Professor P. Vetro and the
Editorial Board of the Journal "Rendiconti del Circolo Matematico di
Palermo" for accepting to publish the Proceedings of the Conference in
two supplements of the same Journal.
December 1997 The Organizing Committe
DISPOSITIVO ORTODONTICO PER TRAZIONE EXTRAORALE
No full textDispositivo ortodontico per trazione extraorale, comprendente almeno un corpo centrale (1), una o più porzioni di appoggio (2, 3, 4, 5) sulla testa del paziente ed una o più porzioni di trazione (6), le quali porzioni di trazione (6) si impegnano con un apparecchio intraorale, il quale dispositivo è provvisto di uno o più sensori (7, 8) per la misurazione della forza esercitata dalle porzioni di trazione (6)
Thermal-Oxidative Growth of Sub-Stoichiometric WO3-x Nanowires at Mild Conditions
Full text linkHerein, the growth of substoichiometric tungsten oxide (WO3–x) nanowires (NWs) via thermal oxidation of W films (a few 10 to a few 100 nm thick) deposited by Ar‐plasma sputtering on fluorine‐doped tin oxide (FTO) substrates is reported. A thermal treatment at relatively low temperature (525–550 °C) in Ar at atmospheric pressure leads to the conversion of the W films into W suboxide (WO3–x) NW arrays. Such NWs have a length of ≈500 nm and their diameter ranges from 10 to 40 nm depending on the duration of the annealing process. These growth conditions for the formation of WO3–x NWs are significantly milder and more straightforward than those reported in previous literature. This avoids high temperatures (e.g., above 600 °C), vacuum conditions, or the addition of catalysts. A thermal‐oxidative approach of these sputtered films is suitable to directly form WO3–x NWs on various surfaces, including conductive substrates to fabricate photoelectrodes or large‐scale supports, e.g., for smart windows
MABS validation through repeated execution and data mining analysis
No full textAgent Based Modelling is the most interesting and advanced approach for simulating a complex system: in a social context, the single parts and the whole are often very hard to describe in detail. Besides, there are agent based formalisms which allow to study the emergency of social behaviour with the creation and study of models, known as artificial societies. Thanks to the ever increasing computational power, it's been possible to use such models to create software, based on intelligent agents, which aggregate behaviour is complex and difficult to predict, and can be used in open and distributed systems. Data mining is born in the last decades in order to help users in finding useful knowledge from the otherwise overwhelming amount of data available nowadays from the web and the data collected every day by companies. Data Mining techniques can therefore be the keystone to reveal non-trivial knowledge expressed by the initial assumption used to build the micro-level of the model and the structure of the society of agents that emerged from the simulation
Site-selective Pt dewetting on WO3-coated TiO2nanotube arrays: An electron transfer cascade-based H2evolution photocatalyst
No full textAmong several parameters that affect the yield of a photocatalytic process mediated by a metal oxide semiconductor, key is the efficient separation and transfer of photo-generated charge carriers. To overcome kinetic limitations and enable charge transfer, an effective strategy is to decorate the photocatalyst surface with cocatalytic nanoparticles of either a second semiconductor metal oxide or a noble metal. Nevertheless, classical deposition techniques based on powder technology approaches lead to randomly placed cocatalytic nanoparticles at the photocatalytic surface. The poor control over cocatalyst placement can drastically hamper the photocatalytic efficiencies, and can also prevent a full understanding of the charge carrier dynamics and photocatalytic mechanism. Here we investigate a highly defined charge separation platform for photocatalytic H2evolution based on a Pt-WO3-TiO2“stacked” structure constructed on anodically grown TiO2nanotube arrays. Key is the formation of a site-selective and sequential W and Pt metal sputter-decoration only at the mouth of highly-ordered TiO2nanotubes. After placing the W-Pt bilayer at the nanotubes mouth, a suitable thermal treatment forms a WO3layer atop the nanotubes while the Pt film undergoes solid state dewetting into 2–6 nm-sized Pt nanoparticles. These structures show strongly improved photocatalytic H2evolution efficiency compared to any other single-cocatalyst system (Pt-TiO2and WO3-TiO2) and pristine TiO2nanotubes. The photocatalytic activity improvement is ascribed to an enhanced charge carrier separation mechanism enabled by the well-defined TiO2-WO3-Pt architecture that provides swift electron transfer through WO3and towards Pt for H2evolution
Sujeto, lenguaje y orden social en el Leviatán de Hobbes
Full text linkFil: Altomare, Marcelo. Universidad Nacional de Quilmes; Argentina.La crítica dirigida a las concepciones esencialistas de la teoría social condujeron, en las últimas décadas, a destacar, desde una perspectiva teórica novedosa, por un lado, el carácter contingente y discursivo del orden social y, por otro, la relevancia del sujeto en la producción y reproducción de la sociedad. Sin embargo, en el marco de esta perspectiva teórica consideramos que la argumentación realizada por Hobbes en su Leviatán representa, quizás, el primer intento del pensamiento social orientado a reflexionar sobre la relación entre contingencia, discursividad, subjetividad y orden social. Allí la creación y mantenimiento del orden social es, finalmente, el fruto de la invención de un sujeto, cuya autonomía le convierte en el hacedor o gran definidor del significado de todos aquellos significantes fundamentales para la coordinación del conjunto de las acciones de los actores sociales
Optimal marker placement in hadrontherapy: Intelligent optimization strategies with augmented Lagrangian pattern search
No full textAbstractPurposeIn high precision photon radiotherapy and in hadrontherapy, it is crucial to minimize the occurrence of geometrical deviations with respect to the treatment plan in each treatment session. To this end, point-based infrared (IR) optical tracking for patient set-up quality assessment is performed. Such tracking depends on external fiducial points placement. The main purpose of our work is to propose a new algorithm based on simulated annealing and augmented Lagrangian pattern search (SAPS), which is able to take into account prior knowledge, such as spatial constraints, during the optimization process.Material and methodsThe SAPS algorithm was tested on data related to head and neck and pelvic cancer patients, and that were fitted with external surface markers for IR optical tracking applied for patient set-up preliminary correction. The integrated algorithm was tested considering optimality measures obtained with Computed Tomography (CT) images (i.e. the ratio between the so-called target registration error and fiducial registration error, TRE/FRE) and assessing the marker spatial distribution. Comparison has been performed with randomly selected marker configuration and with the GETS algorithm (Genetic Evolutionary Taboo Search), also taking into account the presence of organs at risk.ResultsThe results obtained with SAPS highlight improvements with respect to the other approaches: (i) TRE/FRE ratio decreases; (ii) marker distribution satisfies both marker visibility and spatial constraints. We have also investigated how the TRE/FRE ratio is influenced by the number of markers, obtaining significant TRE/FRE reduction with respect to the random configurations, when a high number of markers is used.ConclusionsThe SAPS algorithm is a valuable strategy for fiducial configuration optimization in IR optical tracking applied for patient set-up error detection and correction in radiation therapy, showing that taking into account prior knowledge is valuable in this optimization process. Further work will be focused on the computational optimization of the SAPS algorithm toward fast point-of-care applications
Template-Dewetted Au Nanoparticles on TiO2 Nanocavities for Photocatalytic Reduction and Scavenging of Hg(II)
No full textFacades of the Libreria di San Marco in Venice, The: An Interpretation of the Design Process
No full text"A new work in which I propose an interpretation of the design process Sansovino used to create the magnificent facades of the Libreria di San Marco in Venice, a masterpiece of Renaissance architecture." Sent to Marquand librarian by author Dec. 202
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