University of Pisa

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    1435 research outputs found

    Architectour.net. Un viaggio nell'architettura contemporanea.

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    RIASSUNTO Il portale Architectour.net, rivista online e database, cerca di mettere a disposizione tutta la conoscenza esistente e tutti gli strumenti della necessaria riflessione critica nel campo dell'architettura moderna e contemporanea, permettendo la "diretta" conoscenza delle opere architettoniche in senso documentario. Il contenuto tematico della rivista online, è collegato con le schede delle opere contenute nel database attraverso i link che consentono di arricchire la ricerca individuale, suggerendo percorsi specifici. Il portale Architectour.net intende essere uno strumento di riferimento per studiosi, studenti e professionisti, ma anche gli appassionati possono trarre beneficio dalla sua consultazione. SUMMARY The portal Architectour.net, online magazine and database, tries to make available the whole existing knowledge and all the instruments of the critical reflection needed in the field of modern and contemporary architecture, allowing "direct" knowledge of the architectural works in a documentary sense. The thematic content of the online magazine, is related with cards of works contained in the database through links that allow to enrich individual research, suggesting specific pathways. The portal Architectour.net intends to be a tool of reference for scholars, students and professionals but also enthusiasts can benefit from its consultation

    Monopole condensation in two-flavour Adjoint QCD

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    SUMMARY In QCD with adjoint fermions (aQCD) the deconfining transition takes place at a lower temperature than the chiral transition. We study the two transitions by use of the Polyakov Loop, the monopole order parameter and the chiral condensate. The deconfining transition is first order, the chiral is a crossover. The order parameters for confinement are not affected by the chiral transition. We conclude that the degrees of freedom relevant to confinement are different from those describing chiral symmetry

    Non-Abelian Vortices without Dynamical Abelianization

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    Vortices carrying truly non-Abelian flux moduli, which do not dynamically reduce to Abelian vortices, are found in the context of softly-broken N=2{\cal N}=2 supersymmetric chromodynamics (SQCD). By tuning the bare quark masses appropriately we identify the vacuum in which the underlying SU(N) gauge group is partially broken to SU(n) \times SU(r) \times U(1)/{\mathbbm Z}_{K}, where KK is the least common multiple of (n,r)(n, r), and with Nfsu(n)=nN_{f}^{su(n)}=n and Nfsu(r)=rN_{f}^{su(r)}=r flavors of light quark multiplets. At much lower energies the gauge group is broken completely by the squark VEVs, and vortices develop which carry non-Abelian flux moduli CPn1×CPr1CP^{n-1}\times CP^{r-1}. For n>rn>r we argue that the SU(n) fluctuations become strongly coupled and Abelianize, while leaving weakly fluctuating SU(r)SU(r) flux moduli. This allows us to recognize the semi-classical origin of the light non-Abelian monopoles found earlier in the fully quantum-mechanical treatment of 4D SQCD

    Analytic continuation in two-color QCD: new results on the critical line

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    We test the method of analytic continuation from imaginary to real chemical potential in two-color QCD, which is free from the sign problem. In particular, we consider the analytic continuation of the critical line to real values of the chemical potential

    Non-Abelian vortices and monopoles in SO(N) theories

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    Non-Abelian BPS vortex solutions are constructed in N=2 theories with gauge groups SO(N)\times U(1). The model has N_f flavors of chiral multiplets in the vector representation of SO(N), and we consider a color-flavor locked vacuum in which the gauge symmetry is completely broken, leaving a global SO(N)_{C+F} diagonal symmetry unbroken. Individual vortices break this symmetry, acquiring continuous non-Abelian orientational moduli. By embedding this model in high-energy theories with a hierarchical symmetry breaking pattern such as SO(N+2) --> SO(N)\times U(1) --> 1, the correspondence between non-Abelian monopoles and vortices can be established through homotopy maps and flux matching, generalizing the known results in SU(N) theories. We find some interesting hints about the dual (non-Abelian) transformation properties among the monopoles

    On the phase diagram of the Higgs SU(2) model

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    SUMMARY The Higgs SU(2) model with fixed Higgs length is usually believed to have two different phases at high gauge coupling (\beta), separated by a line of first order transitions but not distinuguished by any typical symmetry associated with a local order parameter, as first proved by Fradkin and Shenker. We show that in regions of the parameter space where it is usually supposed to be a first order phase transition only a smooth crossover is in fact present

    The roles of System Dynamics in environmental problem solving

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    The presente Technical Report contains a few notes about the roles of System Dynamics for the solution of environmental problems. It is not an introduction to System Dynamics. More about the content in the abstract. Reports of errors and inaccuracies are gratefully appreciated

    Participative methods and consensus theory

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    The present Technical Report contains a concise analysis of some participatory methods and a discussion of the bold;method of consensusas a formal tool for decisionmaking.The treatment is kept at an informal and colloquial level with the aim to be precise and concise.Thei Technical Report relies mainly on classical results, so that it may be considered as a real primer on these topics, but contains also novel materials and results.Reports of errors and inaccuracies are greatefully appreciated

    Automating and visually inspecting product marking (Part Two) / Automazione e controllo visivo della marcatura di prodotti (Parte Seconda)

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    SUMMARY: Critical aspects of marking stone materials with alphanumerical characters. Artificial vision makes it possible to automate code recognition. Classification of the OCR approaches offered in literature. RIASSUNTO: Aspetti critici della marcatura di materiali lapidei con caratteri alfanumerici. La visione artificiale permette l’automazione del riconoscimento dei codici. Classificazione di approcci per l’OCR proposti in letteratura

    Psichiatria, architettura e sacro nella Vienna d'inizio secolo: alcune note su St. Leopold am Steinhof nel suo centenario

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    RIASSUNTO: Il presente articolo sulla chiesa di St. Leopold am Steinhof intende correlare, attraverso la collaborazione di studiosi di diversa estrazione, i vicini ambiti delle scienze mediche e umane per una riflessione su psichiatria, architettura e sacro nella Vienna d’inizio secolo. Questo breve saggio è debitore di vari contributi critici riguardanti il clima culturale viennese dell’epoca, ma intende più specificatamente caratterizzarsi per il focus sulla considerazione della dimensione spirituale nella psichiatria dei primi del Novecento e quindi proprio sull’edificio sacro wagneriano, andando a integrare la scarsa bibliografia in lingua italiana dedicata specificatamente alla suddetta chiesa, della quale nel 2007 ricorreva il centenario del completamento della costruzione. SUMMARY: This interdisciplinary paper about St. Leopold am Steinhof gives the opportunity of a debate regarding architecture, religion and psychiatry in fin-de-siècle Vienna. The essay starts from other critical publications about art, science and culture in Vienna, but has the new aim to focus on a particular matter: the attention devoted from psychiatry to the spiritual dimension of the man at the beginning of the XXth century. The church designed by Otto Wagner and built in 1907 is the main example of a place of worship in a new psychiatric complex

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