119,687 research outputs found
Bianchi type-I universe in f(R, T) modified gravity with quark matter and Λ
No full text32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, we investigate homogeneous and anisotropic Bianchi type I universe in the presence of quark matter source in f (R, T) gravity (Harko et al. in Phys. Rev. D 84:024020, 2011) with cosmological constant A (where R is the Ricci scalar and T is the trace of the energy momentum tensor). For this aim we have used the anisotropy feature of Bianchi type I universe and equation of states (EoS) of quark matter. We explore the exact solution f(R, T)=R + 2f(T) model for Bianchi type I universe model. When t -> infinity, we get very small cosmological constant value, this result agrees with recent observations.Turkish Phys So
Perfect fluid LRS Bianchi type -I-Universe model in F (R, T)
No full text© 2018 Author(s).In this study, the LRS (Local Rotational Symmetric) perfectly fluid Bianchi type -I-cosmological model is considered with the F(R, T) gravity. The particular case of f1(R) = λ1R and f2(T) = λ2T are considered where λ1 and λ2 are real constant. [3]
Processi e pratiche di educazione alla salute e formazione delle donne migranti nel SAI: studio di caso sulle vittime di tratta a Latina1
No full textIl contributo si concentra su un modello di servizio caratterizzato da un’équipe interdisciplinare e multiprofessionale, che progetta e realizza percorsi sia di educazione alla salute e al benessere e di formazione delle donne migranti accolte nel territorio laziale, sia di formazione in servizio delle professioni educative, pedagogiche e di settore. Il lavoro si colloca nel solco della Pedagogia interculturale (Pinto Minerva, 2002; Fiorucci e Catarci, 2015; Fiorucci 2020; Cerrocchi, 2019) e di genere e delle differenze (Roverselli, 2017; Lopez, 2018; hooks, 2020;), mutuando categorie interpretative e concetti dalla prospettiva intersezionale (Bianchi, 2019; 2022). Muovendo dal quadro teorico, viene dato conto di uno studio di caso relativo ai processi e alle pratiche educative e di formazione a vantaggio di donne vittime di tratta inserite nel SAI (Sistema Accoglienza Integrazione) del territorio laziale a partire dal 2019, sino ad oggi. Il ricorso a un impianto di ricerca-azione-formazione coinvolge le figure educative e di coordinamento pedagogico in ogni fase di indagine, intervento e formazione. Alla luce dei nuclei emersi dalla somministrazione e triangolazione degli strumenti – a favore della produzione di materiali, documenti e strategie di intervento – sono prospettati terreni di progettualità educativa nei servizi che ambiscono alla formazione integrale della persona; dall’accesso al Servizio Sanitario, alla presa in carico e cura della popolazione migrante femminile; dalla ricomposizione delle traumaticità alla valorizzazione di stili di vita salutari e sostenibili, in ottica interculturale e postcoloniale
ON SOME AXIOMATIC EXTENSIONS OF THE MONOIDAL T-NORM BASED LOGIC MTL: AN ANALYSIS IN THE PROPOSITIONAL AND IN THE FIRST-ORDER CASE
No full textThe scientific area this thesis belongs to are many-valued logics: in particular, the logic MTL and some of its extensions, in the propositional and in the first-order case (see [8],[9],[6],[7]). The thesis is divided in two parts: in the first one the necessary background about these logics,
with some minor new results, are presented. The second part is devoted to more specific topics: there are five chapters, each one about a different problem. In chapter 6 a temporal semantics for Basic Logic BL is
presented. In chapter 7 we move to first-order logics, by studying the supersoundness property: we have improved some previous works about this theme, by expanding the analysis to many extensions of the first-order version of MTL. Chapter 8 is dedicated to four different families of n-contractive axiomatic extensions of BL, analyzed in the propositional and in the first-order case: completeness, computational and arithmetical complexity, amalgamation and interpolation properties are studied. Finally, chapters 9 and 10 are about Nilpotent Minimum logic (NM, see [8]): in chapter 9 the sets of tautologies of some NM-chains (subalgebras
of [0,1]_NM) are studied, compared and the problems of axiomatization and undecidability are tackled. Chapter 10, instead, concerns some logical and algebraic properties of (propositional) Nilpotent Minimum logic. The results (or an extended version of them) of these last chapters have
been also presented in papers [1, 4, 5, 2, 3]. ---------------------------------References---------------------------------------------
[1] S. Aguzzoli, M. Bianchi, and V. Marra. A temporal semantics for Basic
Logic. Studia Logica, 92(2), 147-162, 2009. doi:10.1007/s11225-009-9192-3.
[2] M. Bianchi. First-order Nilpotent Minimum Logics: first steps. Submitted
for publication,2010.
[3] M. Bianchi. On some logical and algebraic properties of Nilpotent Minimum
logic and its relation with Gödel logic. Submitted for publication, 2010. [4] M. Bianchi and F. Montagna. Supersound many-valued logics and
Dedekind-MacNeille completions. Arch. Math. Log., 48(8), 719-736, 2009.
doi:10.1007/s00153-009-0145-3.
[5] M. Bianchi and F. Montagna. n-contractive BL-logics. Arch. Math. Log.,
2010. doi:10.1007/s00153-010-0213-8.
[6] P. Cintula, F. Esteva, J. Gispert, L. Godo, F. Montagna, and C. Noguera.
Distinguished algebraic semantics for t-norm based fuzzy logics: methods
and algebraic equivalencies. Ann. Pure Appl. Log., 160(1), 53-81, 2009.
doi:10.1016/j.apal.2009.01.012.
[7] P. Cintula and P. Hájek. Triangular norm predicate fuzzy logics. Fuzzy Sets
Syst., 161(3), 311-346, 2010. doi:10.1016/j.fss.2009.09.006.
[8] F. Esteva and L. Godo. Monoidal t-norm based logic: Towards a
logic for left-continuous t-norms. Fuzzy sets Syst., 124(3), 271-288, 2001.
doi:10.1016/S0165-0114(01)00098-7.
[9] P. Hájek. Metamathematics of Fuzzy Logic, volume 4 of Trends
in Logic. Kluwer Academic Publishers, paperback edition, 1998.
ISBN:9781402003707
A Note on Saturated Models for Many-Valued Logics
No full textIn this short paper we will discuss on saturated and κ-saturated models of many-valued (t-norm based fuzzy) logics. Using these peculiar structures we show a representation theorem à la Di Nola for several classes of algebras including MV, Gödel, product, BL, NM and WNM-algebras. Then, still using (κ)-saturated algebras, we finally show that some relevant subclasses of algebras related to many-valued logics also enjoy the joint embedding property and the amalgamation property
Bianchi Type Cosmological Models in Tele-parallel Gravity
No full textSymmetry assumptions on the geometrical framework have provided successful
mechanisms to develop physically meaningful solutions to many problems. In
tele-parallel gravity, invariance of the frame and spin-connection under a
group of motions defines an affine symmetry group. Here, we assume there exists
a three-dimensional group of affine symmetries acting simply transitively on a
spatial hypersurface and that this group of symmetry actions defines our affine
frame symmetry group. We determine the general form of the co-frame and spin
connection for each spatially homogeneous Bianchi type. We then construct the
corresponding field equations for tele-parallel gravity. We show that if
the symmetry group is of Bianchi type A (, , , , or
) then there exists a co-frame/spin connection pair that is consistent with
the antisymmetric part of the field equations of tele-parallel gravity.
For those geometries having a Bianchi type B symmetry group (, , ,
), we find that in general these geometries are inconsistent with the
antisymmetric part of the tele-parallel gravity field equations unless
the theory reduces to an analog of General Relativity with a cosmological
constant.Comment: 28 page
Bianchi type-I universe in Lyra manifold with quadratic equation of state
No full text32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, we have solved Einstein field equations for Bianchi type I universe model in Lyra manifold with quadratic equation of state (EoS) p = alpha rho(t)(2) - rho(t). Where alpha not equal 0 is an important constant. Cosmic pressure, density and displacement vector (beta(2)) are related with a constant. In this study beta(2) is a decreasing function of time and behaves like a cosmological constant. These solutions agree with the studies of lialford, Pradhan and Singh, Aygun et al., Agarwal et al., Yadav and liaque as well as SN la observations.Turkish Phys So
Rondo // Del Sig.re Maestro Bianchi // Cantato dal Sig.re Rinaldi // et composto in 1782
No full textTitre uniforme : Bianchi, Francesco (1752?-1810). Compositeur. [Castore e Polluce. Sembianze amabili del mio bel'sole. Fa majeur]Au titre le nom de Borghi a été rayé et remplacé par Bianchi. - De plusieurs mains à la p. de t. : "aria", "Sembianze amabili" et "f. 15". - Livret de Carlo Innocenzo Frugoni. - 1ère représentation : Florence, Théâtre della Pergola, 8 septembre 1779. - Version légèrement différente de D. 1102 (6) et D 1098 (5). - Castore e Polluce ne semble pas avoir été représenté en 1782. - Rôle : [Castore] (Ut 1). - Vl 2, b, fl 2, cor 2 (en fa). - Autre titre : I TindaridiPrésentation musicale : [Partition]Incipit : Sembianze amabili del mio bel'soleAppartient à l’ensemble documentaire : RISM1Appartient à l’ensemble documentaire : RISMMssAirs d'opér
Perfect fluid Bianchi cosmological model admitting conformal motions in f(Q, T) gravity
No full textIn this paper, we intend to explore Conformal Vector Fields (CVFs) of the Locally Rotationally Symmetric (LRS) Bianchi type-I cosmological model within the setup of f(Q, T) gravity, where Q denotes the non-metricity scalar and T is the trace of stress energy tensor. We start with a linear form of f(Q, T) gravity to solve equations of motion in the background of a type I LRS Bianchi cosmological model. We then follow a general form of the function f(Q, T) along with some additional constraints to explore exact space-times. With the help of such general form, we construct four types of non-trivial f(Q, T) gravity models. These models are in square root form, power law form, an exponential as well as a logarithmic form. Applying these f(Q, T) gravity models, we explore a variety of cosmological solutions admitting rotational symmetry. For these cosmological solutions, we find the CVFs. We observe that the constructed LRS Bianchi type-I solutions admit CVFs of dimension four, five, six, or fifteen. The physical entities like energy density and pressure associated with each Bianchi cosmological model are also being discussed
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