Las carnalidades del frío: exploración poética de la obra de Mª Ángeles Pérez López

¿Cuáles son los entresijos discursivos y las formas de vida que se ponen en juego en los textos poéticos de María Ángeles Pérez López?, ¿qué espacios inaugura la palabra poética?, ¿desde dónde pensar un mundo que se encarna en cuerpo de mujer? Ese es el eje de la lectura que propongo en este texto a través de un recorrido por la obra poética de Pérez López. Tanto el discurso feminista que pone en el centro el lenguaje y sus posibilidades transformadoras de realidad como la palabra poética de muchas mujeres, abren la mirada a la complejidad de lo real dejando ver haz de luz nueva, construcción de espacios de realidad diferente que oculta entre el magma del discurso hegemónico aparece de forma reveladora

Digital marketing actions that achieve a better attraction and loyalty of users: an analytical study

Currently, the digital economy contributes decisively to an increase in competitiveness, especially as a digital transformation involves migrating to new technological models where digital marketing is a key part of growth and user loyalty strategies. Internet and Digital Marketing have become important factors in campaigns, which attract and retain Internet users. This study aims to identify the main ways in which users can be gained and retained by using Digital Marketing. The Delphi method with in-depth interviews was the methodology used in this study. The results of the research show the most important actions for achieving user recruitment and loyalty with Digital Marketing from the opinions of consulted experts. The limitations of this study are those related to the number of experts included in the study, and the number of research papers consulted in the literature review. The literature review and the results of this research are used to propose new solid research with a consolidated critical methodology. This research deals with a new approach that will optimize web technologies for the evolution of user trends, and therefore, will be of academic and professional use for marketing managers and web solution developers. The conclusions of the investigation show the key factors, discarding others that do not affect the optimization of conversions in B2C businesses such as the duration of the session and the rebound percentage. Likewise, the results of the research identify the specific actions that must be carried out to attract and retain users in B2C companies that use the Digital Marketing ecosystem on the Internet. The requirements for companies that wish to implement a model to optimize conversions using the current digital economy are also shown.info:eu-repo/semantics/publishedVersio

Mammals (Tetrapoda: Mammalia) of the Sierra Madre Occidental, Mexico: megadiversity in an area of high environmental complexity

  La Sierra Madre Occidental (SMO) es la cadena montañosa más grande de México (1,400 km), y no obstante una de las regiones menos estudiadas del país. Utilizando registros de ejemplares examinados en colecciones científicas, observaciones directas, fotografías y datos bibliográficos, construimos una base de datos con 4,659 registros únicos de mamíferos. Nuestros objetivos fueron generar una lista de especies, examinar patrones generales de distribución, relacionar estos patrones con ecorregiones y vegetación, y discutir la importancia de la SMO como centro de endemismo y alta diversidad. Se documentaron 171 especies (34.3 % de los mamíferos terrestres mexicanos). Cuarenta y siete son endémicos de México, incluyendo diez endémicos de la SMO. La mayor riqueza de especies se registró en la ecorregión Tropical (125). El mayor número de endemismos se registró en esta misma ecorregión (37), seguida de Madrense Sur (24) y Madrense Tropical (22). Nueve de las diez especies endémicas de la SMO se distribuyen en áreas templadas. Poco o ningún esfuerzo de colecta ha sido llevado a cabo en más de la mitad de la SMO. El recambio de especies refleja la diversidad y complejidad de biomas, más que los gradientes latitudinales que podrían esperarse. Solo 4.8 % de la SMO se encuentra dentro de un área protegida, pero éstas no incluyen biomas vulnerables como el bosque mesófilo. Es urgente la investigación biológica en la SMO, un área donde se desarrollan extensas actividades mineras, forestales, ganaderas, y más recientemente, turísticas y provisión servicios ambientales.The Sierra Madre Occidental (SMO) is the largest mountain range in Mexico (1,400 km long), and yet one of the least studied regions. Using records from museum specimens, direct observations, photographs, and literature data, we built a database with 4,659 unique mammal records. Our aims were to generate a species list, to examine general distribution patterns, to relate these patterns to ecoregions and vegetation, and to discuss the importance of the SMO as a center of endemism and high biological diversity. We recorded 171 species (34.3% of the Mexican terrestrial mammals). Forty-seven are endemic of Mexico, including ten endemics of the SMO. The highest species richness was recorded at the Tropical ecoregion (T, 125 species), followed by Madrean South (MS, 100), and Madrean Xerophylous (MX, 95). The highest number of endemics was recorded in T (37), followed by MS (24), and Madrean tropical (MT, 22). Nine of ten species endemic to the SMO occur in the temperate highlands. Sampling efforts have been scarce or nonexistent for over half the SMO. Species turnover reflects the complexity of the biomes that occur in the Sierra, and not the expected latitudinal patterns of species richness. Only 4.8% of the SMO is within a protected area, and the areas that are protected do not include vulnerable biomes like the cloud forest. Biological research is urgent in the SMO, an area under intensive mining, forestry, cattle ranching, and more recently, tourism and environmental services

Immediately restored dental implants for partial-arch applications : a literature update

This article carries out a literature update on immediately restored dental implants in partially edentulous patients. A search was made in Medline of all articles published between the year 2000 and February 2007, including all articles published in both English and Spanish, in which immediate restoration of implants was made of partially edentulous areas with a minimum of 12 implants and six months follow-up. Certain decisive factors exist for the success of this technique in partially edentulous patients, such as primary stability, a roughened implant surface, and the absence of parafunctional habits in patients acceptable for this type of treatment. Following the analysis of these studies of immediate restoration of teeth in partially edentulous areas, a weighted mean survival of 95.39% was observed. In spite of the high success rate, major controversy still exists on this subject resulting in few studies and short follow-up periods, making the routine use of this technique questionable

Autonomous fault emulation: a new FPGA-based acceleration system for hardness evaluation

The appearance of nanometer technologies has produced a significant increase of integrated circuit sensitivity to radiation, making the occurrence of soft errors much more frequent, not only in applications working in harsh environments, like aerospace circuits, but also for applications working at the earth surface. Therefore, hardened circuits are currently demanded in many applications where fault tolerance was not a concern in the very near past. To this purpose, efficient hardness evaluation solutions are required to deal with the increasing size and complexity of modern VLSI circuits. In this paper, a very fast and cost effective solution for SEU sensitivity evaluation is presented. The proposed approach uses FPGA emulation in an autonomous manner to fully exploit the FPGA emulation speed. Three different techniques to implement it are proposed and analyzed. Experimental results show that the proposed Autonomous Emulation approach can reach execution rates higher than one million faults per second, providing a performance improvement of two orders of magnitude with respect to previous approaches. These rates give way to consider very large fault injection campaigns that were not possible in the past.This work was supported by the Directorate of Research of Madrid Community Government, Spain (Code 07/0052/2003 2) and by the European Commission and Spanish Government under MEDEA+ Project (PARACHUTE-2A701) and PROFIT Project (CIRCE-FIT-330100-2005-60)

Extensive SEU impact analysis of a PIC microprocessor for selective hardening

In order to increase the robustness of a circuit against SEUs, fault injection is commonly used to locate weak areas. autonomous emulation is a very powerful tool to locate these areas by executing huge fault injection campaigns. In this work, fault injection has been extensively applied to a PIC18 microprocessor, while executing three different workloads. A 80 million fault campaign has been performed, and results show that a failure rate lower than 1% can be obtained by hardening a 24% of the circuit flip-flops, for the given applications

Periodic Trajectories Obtained With an Active Tractor Beam Using Azimuthal Polarization: Design of Particle Exchanger

We analytically calculate the forces generated on the near field by a focused azimuthally polarized Hermite-Gauss beam after passing a complex mask formed by two annular pupils. The resultant optical tractor beam shows two transport channels that move trapped objects upstream or downstream along the conveyor. From the analysis of the phase diagrams, we theoretically demonstrate that, depending on illumination intensity, the 3-D behavior of nanoparticles in this conveyor shows a limit cycle between transport channels. This limit cycle appears as a consequence of diffraction that produces spatially limited optical forces. We theoretically demonstrate the possibility of using the limit cycle to design a particle exchanger between channels

Helical tractor beam: analytical solution of Rayleigh particle dynamics

We analyze particle dynamics in an optical force field generated by helical tractor beams obtained by the interference of a cylindrical beam with a topological charge and a co-propagating temporally de-phased plane wave. We show that, for standard experimental conditions, it is possible to obtain analytical solutions for the trajectories of particles in such force field by using of some approximations. These solutions show that, in contrast to other tractor beams described before, the intensity becomes a key parameter for the control of particle trajectories. Therefore, by tuning the intensity value the particle can describe helical trajectories upstream and downstream, a circular trajectory in a fixed plane, or a linear displacement in the propagation direction. The approximated analytical solutions show good agreement to the corresponding numerical solutions of the exact dynamical differential equations

A checklist of the mammals (Mammalia) of Chihuahua, Mexico

An updated list of the mammals of Chihuahua state, Mexico was assembled from the literature and from museum specimens. We documented 133 species (15 endemic to Mexico and 11 new for Chihuahua), representing 25 families, 75 genera, and 27.4% of the Mexican terrestrial mammalian fauna. Four species are probably extirpated from the state. Four major ecoregions have been defined for Chihuahua: Arid, Valleys, Sierra, and Quebradas. Species richness was the highest in Valleys, and consisted mostly of species with Nearctic affinities. In contrast, Quebradas were the least species-rich, but included mostly Neotropical species that occur only in this ecoregion of Chihuahua. Despite the fact that Chihuahua harbors considerable biodiversity and unique Mexican biomes, conservation efforts are insufficient. The current rate of anthropogenic modification in the state requires a comprehensive strategy if Chihuahua’s biodiversity is to be preserved

SEU Sensitivity Comparison for Different Reprogrammable Technologies With Minority Check Block

In this work, a method is proposed for obtaining comparable measurements of the SEU sensitivity in reprogrammable devices that present different characteristics like internal architecture, technology, amount of available resources, etc. A specific minority checker is developed for reporting the presence of SEUs or MBUs which will help in this comparing task during dynamic tests.This work was supported in part by the Spanish Ministry of Science and Technology, code TEC2010-22095-C03-03. RENASER+ projec