Carlos Lozano y Lozano: obra escogida

La presente obra se divide en dos secciones. La primera presenta una visión de la vida y la obra de Carlos Lozano y Lozano y en la segunda aparecen algunos de sus escritos más notables, especialmente los que muestran su visión de los terrenos del derecho y de la historia. En la primera parte se mencionan algunos datos sobre la familia de Lozano, tras lo cual se recorre sus estudios en el Colegio del Rosario; donde fue alumno, colegial y secretario. En 1925 se retira del Rosario para viajar al Perú, donde su padre Fabio Lozano Torrijos se desempeñaba como Embajador. Lozano continúa sus estudios en Italia y en Francia y vuelve a Colombia, en postrimerías de la llamada República Conservadora, para ocupar un puesto de vanguardia en las posiciones del Estado colombiano, principalmente del Parlamento, durante el primer gobierno de López Pumarejo, para desempeñar la Legalización de Colombia entre el gobierno de Francia. En el siguiente gobierno, de Eduardo Santos, ocupó el Ministerio de Justicia y la embajada de Colombia ante el gobierno del Brasil, donde alcanzó altísimos reconocimientos tanto en el terreno diplomático como en el cultural

Calidad periodística

Reseña GÓMEZ MOMPART, Josep Lluís; GUTIÉRREZ LOZANO, Juan Francisco y PALAU SAMPIO, Dolors (eds.) (2013). La calidad periodística. Teorías, investigaciones y sugerencias profesionales. València: PUV. Colección Aldea global.Review of: GÓMEZ MOMPART, Josep Lluís; GUTIÉRREZ LOZANO, Juan Francisco y PALAU SAMPIO, Dolors (eds.) (2013). La calidad periodística. Teorías, investigaciones y sugerencias profesionales. València: PUV. Colección Aldea global

S-Duality in Gauge Theories as a Canonical Transformation

We show that S-duality in four dimensional non-supersymmetric abelian gauge theories can be formulated as a canonical transformation in the phase space of the theory. This transformation is the usual interchange between electric and magnetic degrees of freedom. It is shown that in phase space the modular anomaly emerges as the result of integrating out the momenta degrees of freedom. The generalization to d dimensional abelian gauge theories of p forms is also considered. In the case of non-abelian gauge theories a careful analysis of the constraints implied by the canonical transformation shows that it does not relate Yang-Mills theories with inverted couplings. In fact the dual theory is shown to be of Freedman- Townsend's type, also with ${\tilde \tau}=-1/\tau$, $\tau=\frac{\theta}{2\pi}+\frac{4\pi i}{g^2}$.Comment: 13 pages, latex file, important changes in the non-abelian case. Some references adde

Constructing families of moderate-rank elliptic curves over number fields

We generalize a construction of families of moderate rank elliptic curves over $\mathbb{Q}$ to number fields $K/\mathbb{Q}$. The construction, originally due to Steven J. Miller, \'Alvaro Lozano-Robledo and Scott Arms, invokes a theorem of Rosen and Silverman to show that computing the rank of these curves can be done by controlling the average of the traces of Frobenius, the construction for number fields proceeds in essentially the same way. One novelty of this method is that we can construct families of moderate rank without having to explicitly determine points and calculating determinants of height matrices.Comment: Version 1.0, 4 pages, sequel to arXiv:math/040657

Hints of 5d Fixed Point Theories from Non-Abelian T-duality

In this paper we investigate the properties of the putative 5d fixed point theory that should be dual, through the holographic correspondence, to the new supersymmetric AdS(6) solution constructed in Lozano et al. This solution is the result of a non-Abelian T-duality transformation on the known supersymmetric AdS(6) solution of massive Type IIA. The analysis of the charge quantization conditions seems to put constraints on the global properties of the background, which, combined with the information extracted from considering probe branes, suggests a 2-node quiver candidate for the dual CFT.Comment: v2, typos corrected, comments added, to appear in JHE

Duality and Canonical Transformations

We present a brief review on the canonical transformation description of some duality symmetries in string and gauge theories. In particular, we consider abelian and non-abelian T-dualities in closed and open string theories as well as S-duality in abelian and non-abelian non-supersymmetric gauge theories.Comment: 21 pgs, latex file, talk given at the Argonne Duality Institute, June 27-July 12, 1996, to appear in the e-proceeding

Exploring the nature of intimate relationships: A Māori perspective

The 2002 World Report on Violence states that violence occurs in about 70 percent of intimate relationships (Krug, Dahlberg, Mercy, Zwi, & Lozano, 2002). New Zealand research indicates that more than a quarter of relationships have experienced intimate partner violence (IPV), with Māori (Indigenous people of New Zealand) women three times more likely to experience IPV in their lifetime. Utilising Kaupapa Māori (Māori-centred approach) and narrative methodologies, this paper explores the nature of intimate relationships from a Māori perspective, investigating how Māori initiate intimate relationships, attempt to maintain positive intimate relationships and when applicable, exit intimate relationships. The findings from two case studies reveal that intimate relationships involve identity negotiation and an incorporation of cultural values. Communication processes are highlighted as a facilitating factor of intimate relationships