Exact beta function from the holographic loop equation of large-N QCD_4

We construct and study a previously defined quantum holographic effective action whose critical equation implies the holographic loop equation of large-N QCD_4 for planar self-avoiding loops in a certain regularization scheme. We extract from the effective action the exact beta function in the given scheme. For the Wilsonean coupling constant the beta function is exacly one loop and the first coefficient agrees with its value in perturbation theory. For the canonical coupling constant the exact beta function has a NSVZ form and the first two coefficients agree with their value in perturbation theory.Comment: 42 pages, latex. The exponent of the Vandermonde determinant in the quantum effective action has been changed, because it has been employed a holomorphic rather than a hermitean resolution of identity in the functional integral. Beta function unchanged. New explanations and references added, typos correcte

Transition in the workplace: The experience of Italian transgender and gender non-conforming people through the lens of the minority stress theory

Transgender and gender non-conforming (TGNC) people are a highly stigmatized population experiencing high rates of minority stress and adverse health outcomes. Notwithstanding that, they are able to use adaptive coping strategies to buffer the effect of stigma on their health. Recently, vocational experiences of TGNC individuals were connected to minority stressors, highlighting the effects that stigma have on vocational outcomes. Through the lens of the minority stress theory, this study aimed at exploring the emotional and psychological implications of the gender transition process in the workplace in two male-to-female and six female-to-male Italian TGNC individuals taking part in the study “Reinterpreting organizations through transgender and gender non-conforming narratives”. Participants sent their narratives to the editorial board of the PuntOorg International Journal (PIJ). Narratives were analyzed through the thematic inductive analysis. Three macrocategories were identified, each containing core themes, as follows: 1) Minority stressors (a. Transphobia and rejection; b. Felt stigma and stigma anticipation; c. Internalized transphobia; d. Passing as an obstacle); 2) Protective factors (a. Passing as a resource; b. Coming out, visibility, and intimacy with colleagues; c. Resilience); 3) Effect of minority stress on health (a. Depression; b. Anger and suicide ideation). Results and organizational implications are discussed

Asymptotic dynamics of nonlinear coupled suspension bridge equations

In this paper we study the long-term dynamics of a doubly nonlinear abstract system which involves a single differential operator to different powers. For a special choice of the nonlinear terms, the system describes the motion of a suspension bridge where the road bed and the main cable are modeled as a nonlinear beam and a vibrating string, respectively, and their coupling is carried out by nonlinear springs. The set of stationary solutions turns out to be nonempty and bounded. As the external loads vanish, the null solution of the system is proved to be exponentially stable provided that the axial load does not exceed some critical value. Finally, we prove the existence of a bounded global attractor of optimal regularity in connection with an arbitrary axial load and quite general nonlinear terms

Steady states analysis and exponential stability of an extensible thermoelastic system

In this work we consider a nonlinear model for the vibrations of a thermoelastic beam with fixed ends resting on an elastic foundation. The behavior of the related dissipative system accounts for both the midplane stretching of the beam and the Fourier heat conduction. The nonlinear term enters the motion equation, only, while the dissipation is entirely contributed by the heat equation. Under stationary axial load and uniform external temperature the problem uncouples and the bending equilibria of the beam satisfy a semilinear equation. For a general axial load $p$, the existence of a finite/infinite set of steady states is proved and buckling occurrence is discussed. Finally, long-term dynamics of solutions and exponential stability of the straight position are scrutinized

On some nonlinear models for suspension bridges

In this paper we discuss some mathematical models describing the nonlinear vibrations of different kinds of single-span simply supported suspension bridges and we summarize some results about the longtime behavior of solutions to the related evolution problems. Finally, in connection with the static counterpart of a general string-beam nonlinear model, we present some original results concerning the existence of multiple buckled solutions

Radon concentration in self-bottled mineral spring waters as a possible public health issue

Since 2013, the Council Directive 2013/51/Euratom has been regulating the content of radioactive substances in water intended for human consumption. However, mineral waters are exempted from this regulation, including self-bottled springs waters, where higher radon concentration are expected. Therefore, a systematic survey has been conducted on all the 33 mineral spring waters of Lazio (a region of Central Italy) in order to assess if such waters, when self-bottled, may be of concern for public health. Waters have been sampled in two different ways to evaluate the impact of bottling on radon concentration. Water sampling was possible for 20 different spring waters, with 6 samples for each one. The results show that 2 (10%) of measured mineral spring waters returned radon concentrations higher than 100 Bq L−1, i.e., the parametric value established by the Council Directive. These results, if confirmed by other surveys involving a higher number of mineral spring waters, would suggest regulating also these waters, especially in countries like Italy for which: (i) mineral water consumption is significant; (ii) mineral concession owners generally allow the consumers to fill bottles and containers, intended for transport and subsequent consumption, directly from public fountains or from fountains within the plant; (iii) the consumers’ habit of drinking self-bottled mineral water is widespread

Towards a lattice calculation of the coefficients of the QCD chiral Lagrangian

We discuss a general strategy to compute the coefficients of QCD chiral Lagrangian by using the lattice regularization of QCD with Wilson fermions. This procedure requires the introduction of an effective Lagrangian for lattice QCD as an intermediate step in the calculation. The continuum QCD chiral Lagrangian can be then obtained by expanding the lattice effective Lagrangian in increasing powers of the external momenta. A suitable renormalization procedure is required to account for the chiral symmetry breaking introduced by the Wilson term in the lattice action. In anticipation of a numerical simulation, the lattice effective Lagrangian is computed analytically and investigated in the strong coupling and large $N$ limitComment: Talk presented at LATTICE96(chirality in qcd) , 3 pages, no figures. Latex file with espcrc2 styl

Lo stigma anti-transgender da una prospettiva ecologico-sociale: Effetti sulla salute psico-fisica e strategie di intervento

The present study offers an overview on stigma against transgender people, analyzing its effects on physical and psychological well-being. We adopted a socio-ecological perspective, according to which antitransgender stigma may manifest at different levels: along the environment-individual spectrum, stigma may occur at the institutional, interpersonal and individual level. All these typologies make transgender people a very vulnerable group, at risk for several health problems. Authors will finally overview some specific psycho-social interventions aimed at reducing stress, by matching each level of stigma with internationally well-established good practices