Dynamics of ovarian follicles in Tupinambis merianae lizards

Follicular dynamics of Tupinambis merianae lizards was analyzed by means of ultrasound examination and radio frequency identification, during three consecutive reproductive periods, both in reproduction and in sexual isolation. Series of follicular development which ended in ovulation, and series of follicular development without ovulation, followed by a regression process, were observed, as well as a combination of both. Ovulation was found to be strongly dependent on mating consummation. In 34% of the cases in which follicular development ended with ovulation, and hence oviposition, follicles showed a steady and uniform growth up to the periovulatory period, also acquiring a mild echogenicity. In the absence of ovulation (66% of cases), follicular development showed two patterns: a short and a long-term anovulatory follicular cycle. In the first pattern, follicles showed limited growth and a non-echoic aspect, which suggests a previtellogenic condition. In the second pattern, follicles exhibited a growth and echogenicity similar to periovulatory ones, presumably attaining a vitellogenic stage. In addition, follicular development in reproducing females was superior to that of sexually isolated females. Follicular development, ovulation, and follicular regression appeared to constitute generalized events affecting most, if not all, of the recruited follicles

Análisis crítico de las sociedades financieras de objeto múltiple y las sociedades financieras populares.

El presente proyecto de investigación tiene como propósito describir a las SOFOMES y las SOFIPOS por medio del análisis crítico de investigaciones y publicaciones periódicas. En este sentido el presente trabajo se plantea como una investigación de enfoque cualitativo de tipo investigación documental. Es un estudio de caso ya que explora y explica los problemas de este tipo de organizaciones, así como los factores de riesgo para los ahorradores e inversionistas

Agentes inteligentes para sistemas tolerantes a fallos para control industrial, una nueva perspectiva de control

El advenimiento de los agentes a dado lugar a mucha discusión de que son tales agentes, y de la diferencian de programas en general. aquí se menciona una nueva forma de tratar los Sistemas Tolerantes a Fallos en el entorno industrial, introduciendo en paradigma de Agentes Inteligentes, dicho paradigma nos ayudara a tratar los Fallos de una manera autónoma y eficiente, se proponen 3 tipos de agentes que tratar el sistemas en forma jerárquica, y generar un protitipo que ayude a los programadores a tratar estos fallos.Eje: Inteligencia artificialRed de Universidades con Carreras en Informática (RedUNCI

Agentes inteligentes para sistemas tolerantes a fallos para control industrial, una nueva perspectiva de control

El advenimiento de los agentes a dado lugar a mucha discusión de que son tales agentes, y de la diferencian de programas en general. aquí se menciona una nueva forma de tratar los Sistemas Tolerantes a Fallos en el entorno industrial, introduciendo en paradigma de Agentes Inteligentes, dicho paradigma nos ayudara a tratar los Fallos de una manera autónoma y eficiente, se proponen 3 tipos de agentes que tratar el sistemas en forma jerárquica, y generar un protitipo que ayude a los programadores a tratar estos fallos.Eje: Inteligencia artificialRed de Universidades con Carreras en Informática (RedUNCI

Las ciencias sociales en el noreste de México.

Texto colectivo que incluye seis ensayos donde se reflexiona sobre el estado que guardan las ciencias sociales en el noreste de México: antropología, comunicación, economía, geografía, historia y sociología.Redactado por miembros del Grupo Gente (Grupo de Estudios sobre el Noreste de México y Texas) bajo la coordinación de César Morado y Lucila Hinojosa

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV