Pedagogical and Technological University of Colombia
Tunja, Colombia

La Universidad Pedagógica y Tecnológica de Colombia best known as "La UPTC," is a Colombian public university located primarily in Tunja and it maintains presence in 7 Colombian departments. It is considered to be one of the most important and prestigious universities of the country due to their academic level.It has a headquartera, three sectional branches, six sites for extension programs and 21 regional centers for distance learning in which there are 11 faculties, 52 undergraduate academic programs, 15 undergraduate academic distance programs and 23 postgraduate programs. It is an educational, scientific and technological university, currently ranked number 7 among the best 64 universities in Colombia according to a study by Research Sapiens Group research sapiens that built a ranking, which was titled "U-Sapiens Ranking Colombia" where are cataloged 64 universities of the country. Wikipedia.

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Chiquillo E.,Pedagogical and Technological University of Colombia
Journal of Physics A: Mathematical and Theoretical | Year: 2017

Numerically we investigate the ground state of effective one-dimensional spin-orbit (SO) and Rabi coupled two pseudo-spinor Bose-Einstein condensates (BECs) under the effect of harmonic traps. For both signs of the interaction, density profiles of SO and Rabi coupled BECs in harmonic potentials, which simulate a real experimental situation are obtained. The harmonic trap causes a strong reduction of the multi-peak nature of the condensate and it increases its density. For repulsive interactions, the increase of SO coupling results in an uncompressed less dense condensate and with increased multi-peak nature of the density. The increase of Rabi coupling leads to a density increase with an almost constant number of multi-peaks. For both signs of the interaction and negative values of Rabi coupling, the condensate develops a notch in the central point and it seems to a dark-in-bright soliton. In the case of the attractive nonlinearity, an interesting result is the increase of the collapse threshold under the action of the SO and Rabi couplings. © 2017 IOP Publishing Ltd.

Arias Sosa L.A.,Pedagogical and Technological University of Colombia
Archivos de Cardiologia de Mexico | Year: 2017

Heart failure (HF) is a high impact disease that affects all human populations, demanding the development of new strategies and methods to manage this pathology. That’s why microRNAs, small noncoding RNAs that regulate gene expression, appear as an important option in the diagnosis, prognosis and treatment of this disease. MiRNAs seems to have a future on HF handling, because can be isolated from body fluids such as blood, and changes in its levels can be associated with the presence, stage and specific disease features, which makes them an interesting option as biomarkers. Also, due to the important role of these molecules on regulation of gene expression and cell homeostasis, it has been explored its potential use as a therapeutic method to prevent or treat HF. That is why this review seeks to show the importance of biomedical research involving the use of miRNAs as a method to approach the HF, showing the impact of disease in the world, aspects of miRNAs biology, and their use as biomarkers and as important therapeutic targets. © 2017 Instituto Nacional de Cardiología Ignacio Chávez.

Cruz Rubio S.G.,Pedagogical and Technological University of Colombia
Revista Cubana de Educacion Medica Superior | Year: 2017

The systematization in education emerged in Latin America at the beginning of the eighties, under the methodology of participatory research as a process that “empowers, produces the knowing and knowledge”, later on its application scope is broadened up to reaching processes framed within positivism, such as the health sciences. As a collective construction and analytical reflection, the experience seeks to observe, in a conscious way, the environment in which the practice of observation for students of the fifth semester of Bacteriology and clinical laboratory in the local blood bank is developed, in order to encourage the constant self-assessment of the process, meaningful and collaborative learning, as well as minimizing the boundaries between basic component subjects and the students' clinical practices. © 2017, Editorial Ciencias Medicas. All rights reserved.

Reyes Gomez F.,Pedagogical and Technological University of Colombia | Mejia-Salazar J.R.,Federal University of Alagoas
Optics Letters | Year: 2015

We show the existence of a defect mode within the plasmonpolariton gap in 1D defective photonic superlattices, composed by alternating layers of conventional dielectric (A) and negative refractive (B) material slabs with a dielectric defective layer (D), which, in the nonlinear regime, can be tuned by means of the incident field intensity. Also, we have shown that the self-induced transparency phenomena can be only observed when gap-soliton modes, coupled through the defective layer, are excited in both mirror systems around the defective slab. © 2015 Optical Society of America.

Camarchia V.,Polytechnic University of Turin | Fang J.,Polytechnic University of Turin | Moreno Rubio J.,Pedagogical and Technological University of Colombia | Pirola M.,Polytechnic University of Turin | Quaglia R.,Polytechnic University of Turin
IEEE Microwave and Wireless Components Letters | Year: 2013

Design and characterization of a 7 GHz MMIC GaN Doherty Power Amplifier on TriQuint technology are presented. To the best of the authors' knowledge, the present circuit, suitable for C-band point-to-point backhaul applications, represents the first example of a working MMIC GaN Doherty. Large signal measurements, averaged over 16 MMICs, exhibited power gain of 10 dB, saturated output power in excess of 37 dBm (3 dB gain compression), together with drain efficiency of 47%, at 7 dB of output back-off, and higher than 35% in a 350 MHz band. Two-tone characterization has shown a carrier to 3rd order intermodulation ratio higher than 25 dB in the Doherty region. © 2001-2012 IEEE.

Gallego D.,Pedagogical and Technological University of Colombia
Nuclear and Particle Physics Proceedings | Year: 2015

After reviewing several mechanisms proposed to get a dS/Minkowski vacuum in moduli stabilization scenarios of type-IIB superstring orientifold compactifications we propose a criterium for characterizing those that may effectively lead to a positive small cosmological constant. We suggest that the variation in the expectation value of a good uplifting term, due to the shift in the minimum of the potential after uplifting, is much smaller than the original cosmological constant. This is studied with some detail in Large volume scenarios where the dependency on the volume direction is rather generic and easy to spot. Here we find that an uplifting term in the potential, with generic form Vup~1/Vγ, should be restricted to the one satisfying γ. ≪. 12. Such a bound might explain why in models previously studied no uplifting has been achieved, and gives motivations to study a novel proposal of dilaton dependent uplifting mechanism for which no numerical studies has been performed before. We find that in this case it is actually possible to get a dS vacuum, but still leave open the question of a more precise discrimination feature the good uplifting mechanisms should satisfy. © 2015 Elsevier B.V.

Gallego D.,Pedagogical and Technological University of Colombia
International Journal of Modern Physics A | Year: 2014

We revisit the integration of fields in N= 1 Supergravity with the requirement that the effective theory has a reliable two-derivative supersymmetric description. In particular, we study, in a supersymmetric manifest way, the situation where the fields that are mapped out have masses comparable to the Supersymmetry breaking scale and masses of the remaining fields. We find that as long as one stands in regions of the field configuration space where the analytic continuation to superspace of the F-flatness conditions be reliable equations of motion for the fields that are being mapped out, and provided their solutions are stable regardless the dynamics of the remaining fields, such a two-derivative description is a reliable truncation of the full effective theory. The study is mainly focused to models with two chiral sectors, H and L, described by a Kähler invariant function with schematic dependencies of the form G = GH(H,H¯)+GL(L,L¯), which leads to a nearly decoupled theory that allows the previous requirements to be easily satisfied in a consistent way. Interestingly, enough for the matters of our study, this kind of models present a scenario that is as safe as the one presented in sequestered models. It is also possible to allow gauge symmetries as long as these appear also factorized in hidden and visible sectors. Then, the integration of the hidden vector superfields is compulsory and proceeds reliably through the D-flatness condition analytically continued to superspace. © 2015 World Scientific Publishing Company.

Chiquillo E.,Pedagogical and Technological University of Colombia
Journal of Physics A: Mathematical and Theoretical | Year: 2015

We investigate the one-dimensional (1D) and two-dimensional (2D) reduction of a quantum field theory starting from the three-dimensional (3D) many-body Hamiltonian of interacting bosons with spin-orbit (SO) and Rabi couplings. We obtain the effective time-dependent 1D and 2D nonpolynomial Heisenberg equations for both the repulsive and attractive signs of the inter-atomic interaction. Our findings show that in the case in which the many-body state coincides with the Glauber coherent state, the 1D and 2D Heisenberg equations become 1D and 2D nonpolynomial Schrödinger equations (NPSEs). These models were derived in a mean-field approximation from 3D Gross-Pitaevskii equation (GPE), describing a Bose-Einstein condensate (BEC) with SO and Rabi couplings. In the present work self-repulsive and self-attractive localized solutions of the 1D NPSE and the 1D GPE are obtained in a numerical form. The combined action of SO and Rabi couplings produces conspicuous sidelobes on the density profile, for both signs of the interaction. In the case of the attractive nonlinearity, an essential result is the possibility of getting an unstable condensate by the increasing of SO coupling. © 2015 IOP Publishing Ltd.

Gallego D.,Pedagogical and Technological University of Colombia
Journal of High Energy Physics | Year: 2011

We study the reliability of the Two-Step moduli stabilization in the type- IIB Large Volume Scenarios with matter and gauge interactions. The general analysis is based on a family of N = 1 Supergravity models with a factorizable Kähler invariant function, where the decoupling between two sets of fields without a mass hierarchy is easily understood. For the Large Volume Scenario particular analyses are performed for explicit models, one of such developed for the first time here, finding that the simplified version, where the Dilaton and Complex structure moduli are regarded as frozen by a previous stabilization, is a reliable supersymmetric description whenever the neglected fields stand at their leading F-flatness conditions and be neutral. The terms missed by the simplified approach are either suppressed by powers of the Calabi-Yau volume, or are higher order operators in the matter fields, and then irrelevant for the moduli stabilization procedure. Although the power of the volume suppressing such corrections depends on the particular model, up to the mass level it is independent of the modular weight for the matter fields. This at least for the models studied here but we give arguments to expect the same in general. These claims are checked through numerical examples. We discuss how the factorizable models present a context where despite the lack of a hierarchy with the supersymmetry breaking scale, the effective theory still has a supersymmetric description. This can be understood from the fact that it is possible to find vanishing solution for the auxiliary components of the fields being integrated out, independently of the remaining dynamics. Our results settle down the question on the reliability of the way the Dilaton and Complex structure are treated in type-IIB compactifications with large compact manifold volumina. © SISSA 2011.

Rey-Anacona C.A.,Pedagogical and Technological University of Colombia
Terapia Psicologica | Year: 2013

General and sex-differences in prevalence were examined with regard to physical, psychological, emotional, sexual, economical, and negligent dating violence behaviors, in 902 adolescents and youths Colombian single adults, 417 males and 485 women, 15-35 years years-old. 85.6% informed to have been object, at least once, of some abusive behavior. Not statistical differences by sex were found in this general prevalence. The more frequent maltreatment type was the psychological, continued by physical, emotional, sexual, economical, and negligent. Males informed more frequently some emotional, sexual, economical, and negligent abusive behavior than women. Not statistical differences by sex were found with regard to the physical and psychological abuse. © 2013 by Sociedad Chilena de Psicología Clínica.

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