On maximally inflected hyperbolic curves

In this note we study the distribution of real inflection points among the ovals of a real non-singular hyperbolic curve of even degree. Using Hilbert's method we show that for any integers $d$ and $r$ such that $4\leq r \leq 2d^2-2d$, there is a non-singular hyperbolic curve of degree $2d$ in $\mathbb R^2$ with exactly $r$ line segments in the boundary of its convex hull. We also give a complete classification of possible distributions of inflection points among the ovals of a maximally inflected non-singular hyperbolic curve of degree $6$.Comment: 13 pages, 8 figure

Ressenyes

Obra ressenyada: J.M. BRAVO GOZALO (ed.), A New Spectrum of Translation Studies. Valladolid: Universidad de Valladolid, 2004

Geografía social del turismo. Una mirada crítica a la percepción del turismo y a su representación espacial

Social Geography of Tourism arises from a sociological perspective in the application of the geographical approach and his proximity to tourism. The originality of the term at the international level reveals the limited spread of criticism and social theory and, especially, geographical thoughtlessness in this field of studies. The object of this research is a social space of tourism, a spatial representation of a knowledge-emancipation to create a social change, a production of space outside the rationality regulated by the capitalist market and its neoliberalism pedagogy.La Geografía Social del Turismo surge de una perspectiva sociológica en la aplicación del enfoque geográfico y aproximación al turismo. La novedad del término a nivel internacional revela el escaso recorrido de la crítica y la teoría social, así como de la irreflexión geográfica en este campo de estudios. El objeto de la investigación es un espacio social del turismo, representación espacial de un conocimiento-emancipación para proyectar un cambio social, una producción del espacio al margen de la racionalidad regulada por el mercado capitalista y su pedagogía neoliberal

Effect of mold temperature on the impact behavior and morphology of injection molded foams based on polypropylene polyethylene–octene copolymer blends

Producción CientíficaIn this work, an isotactic polypropylene (PP) and a polyethylene–octene copolymer (POE) have been blended and injection-molded, obtaining solids and foamed samples with a relative density of 0.76. Different mold temperature and injection temperature were used. The Izod impact strength was measured. For solids, higher mold temperature increased the impact resistance, whereas in foams, the opposite trend was observed. In order to understand the reasons of this behavior, the morphology of the elastomeric phase, the crystalline morphology and the cellular structure have been studied. The presence of the elastomer near the skin in the case of high mold temperature can explain the improvement produced with a high mold temperature in solids. For foams, aspects as the elastomer coarsening in the core of the sample or the presence of a thicker solid skin are the critical parameters that justify the improved behavior of the materials produced with a lower mold temperature.Ministerio de Economía, Industria y Competitividad (grant DI-15-07952

The phraseology of the language of wine in English and Spanish

According to Sinclair (2000: 197), about 80% of the words in discourse are chosen according to the co-selection principle rather than for purely syntactic or grammatical reasons. Thus, the analysis of how words co-select or combine with other words is a necessary focus of study for any linguist. In other words, the study of phraseology is an essential part of the study of language. This is especially true of specialized languages, where it is not enough to know the terminology of a discipline, but where one also needs to know their contextualised use in order to produce technically stylistic texts either in the original language or in translation. In this paper, after defining what we mean by phraseological units, we will examine the phraseology of the language of wine in English and Spanish, using a comparable corpus of wine tasting notes. We will analyze phraseological units for key wine tasting terms from the point of view of form and meaning, comparing and contrasting our findings for the two languages under study

Computer Tool for Automatically Generated 3D Illustration in Real Time from Archaeological Scanned Pieces

[EN] The graphical documentation process of archaeological pieces requires the active involvement of a professional artist to recreate beautiful illustrations using a wide variety of expressive techniques. Frequently, the artist’s work is limited by the inconvenience of working only with the photographs of the pieces he is going to illustrate. This paper presents a software tool that allows the easy generation of illustrations in real time from 3D scanned models. The developed interface allows the user to simulate very elaborate artistic styles through the creation of diagrams by using the available virtual lights. The software processes the diagrams to render an illustration from any given angle or position. Among the available virtual lights, there are well known techniques as silhouettes enhancement, hatching or toon shading.[ES] El proceso de documentación gráfica de piezas arqueológicas requiere de la participación de un artista capaz de recrear ilustraciones empleando distintas técnicas expresivas. A menudo, la labor del artista se ve limitada por la inconveniencia de trabajar únicamente con fotografías de las piezas a ilustrar. En este artículo se presenta una herramienta informática que permite generar, de una forma sencilla e intuitiva, ilustraciones en tiempo real a partir de modelos 3D escaneados. La interfaz desarrollada permite al usuario simular elaborados estilos artísticos mediante la composición de esquemas de luces virtuales que el computador procesa para generar ilustraciones desde cualquier posición o ángulo. Entre las luces virtuales implementadas se encuentran técnicas bien conocidas como el dibujado de contornos, el rayado o el sombreado plano.Thanks to the Consejería de Innovación y Empresa of the Junta de Andalucía that has partially funded this article through the project of excellence PE09-TIC-5276Consejería de Innovación y Empresa of the Junta de Andalucía PE09-TIC-5276López, L.; Arroyo, G.; Martín, D. (2012). Computer Tool for Automatically Generated 3D Illustration in Real Time from Archaeological Scanned Pieces. Virtual Archaeology Review. 3(6):73-77. https://doi.org/10.4995/var.2012.4447OJS737736DECAUDIN, P. (1996): "Rendu de scènes 3D imitant le style ", Rapport de Recherche 2919, Institut National de Recherche en Informatique et en Automatique.DOSS, J. (2008): "Inking the Cube: Edge Detection with DIRECT 3D 10, [online] http://software.intel.com/en-us/articles/inking-thecube- edge-detection-with-direct3d-10/FREUDENBERG, B. (2003): Stroke-based Real-Time Halftoning Rendering. Ph. D. thesis, University of Magdeburg.HERMOSILLA, P. et al. (2009): "Single Pass GPU Stylized Edges", IV Iberoamerican Symposium in Computer Graphics - SIACG, pp. 1-8.LAKE, A. et al. (2000): "Stylized Rendering Techniques for Scalable Real-Time 3D Animation", NPAR2000: First International Symposium on Non-Photorealistic Animation and Rendering. http://dx.doi.org/10.1145/340916.340918MARTIN, D. et al. (2001): "Rendering Silhouettes with Virtual Lights". Computer Graphics Forum, vol. 20, nº 4, pp. 271-282. http://dx.doi.org/10.1111/1467-8659.00554ROST, R. J. et al (2009): "Open GL Shading Language 3rd Edition". Addison-Wesley.

Coordination of Supply Chain Networks and the Emergence of Mini-maestros

Abstract Companies recognize international sourcing as a business practice useful to reduce product prices, deal with supply shortages and identify new competitive suppliers. Effective international sourcing implies the integration and coordination of materials, processes, information flows and multiple producers at each buying location. Many companies do not have the capabilities or the willingness to develop and manage such sourcing networks; therefore, other entities have assumed these responsibilities. These coordinators are in charge of the integration of many suppliers to develop full-package production, serve as liaisons between suppliers’ capabilities and market demands, and provide the technical and financial support to sustain the sourcing network. The review of the industrial clustering and global supply chain literature allowed the identification of such coordinators in Mexico. The emergence and profile of these coordinators is associated with corporate strategies of multinational firms, the efforts of industrial groups, and the governmental policies for the development of dynamic industrial regions. This paper analyzes the characteristics of four coordination models identified in the Mexican context, focusing on their contribution to the participation and upgrading of national suppliers. The profile of the coordinator firm, the type of relations that this firm sustains with producers and the support offered to suppliers is also discussed. A particular emphasis is given to the fourth model where a third party, a knowledge and service company, assumes the coordinator role. The interest on this model is due to its novelty, the flexibility of the sourcing network, and the potential impact on regional development that could result from the intervention of a neutral third party as coordinator of the activities of multiple local and specialized suppliers

Structural Equation Approach to Analyze Cyclists Risk Perception and Their Behavior Riding on Two-Lane Rural Roads in Spain

[EN] The use of bicycles on two-lane rural roads in Spain has been increasing in recent years. However, these roads have no bicycle infrastructure, being cyclists forced to share the road and interact with motorized vehicles. In rural environments, the interaction between road users from the cyclist's point of view is still not well understood. To analyze it, the relationships between risk perceptions and behavioral factors of rural cyclists according to their demographic characteristics, profile, and self-reported knowledge on traffic rules were obtained. An online survey was used, which collected the opinion of 523 cyclists. Data were analyzed by using structural equation models. The Thurstonian Item Response Theory approach was adopted to include raking responses. Different perceptions among demographic groups were found. Younger cyclists present the lowest risk perception while having a higher risk behavior. The knowledge about traffic rules was correlated with safety behavior, showing the importance of this factor. These results are in line with urban cycling. However important differences under risk elements for rural cyclists, mainly associated with potential hazards on the shoulder, have been drawn. These findings may help policy makers to integrate cycling with vehicular traffic on two-lane rural roads in a safe way.This research was funded by the Ministry of Science, Innovation, and Universities, grant number TRA2016-80897-R and project titled: "Improvement of safety and operation of two-lane rural roads with cyclists (Bike2Lane)"; and by the Direccion General de Trafico of Spain, grant number SPIP2017-02280 and project title: "Road safety countermeasures for two-lane rural roads with groups of cyclists (Safe4Bikes)".López-Maldonado, G.; Arroyo-López, MR.; García García, A. (2021). Structural Equation Approach to Analyze Cyclists Risk Perception and Their Behavior Riding on Two-Lane Rural Roads in Spain. Sustainability. 13(15):1-19. https://doi.org/10.3390/su13158424S119131

Describing phraseological devices in medical abstracts: an English/Spanish contrastive analysis

Producción CientíficaGenre studies have been mainly focused on the rhetorical structure of research papers. However, genre theorists have not systematically studied either relationships among related genres or interlingual studies between genres. The present study aims at describing and comparing the rhetorical and phraseological structures of abstracts in English and Spanish in order to observe how information is rendered in the two languages under analysis. Our methodology is descriptively performed on a comparable corpus of abstracts in the field of diagnostic imaging and published in well-reputed journals. We will determine composition strategies by means of a semantic and functional approach so as to establish their similarities and differences in this genre. Our results will be primarily of help to translators, technical writers and ESP students to better understand some of the discourse aspects of rendering scientific information in both languages.La typologie des genres s’intéresse prioritairement à la structure rhétorique des études de recherche. Cependant, les théoriciens n’ont pas étudié systématiquement les relations entre les genres ni les études interlinguistiques. Cette étude vise à décrire et à comparer les structures rhétoriques et phraséologiques de résumés en anglais et en espagnol afin de déterminer la façon dont l’information est transmise. Notre méthodologie concerne un corpus de résumés dans le domaine de l’imagerie diagnostique des revues de renom. Nous utiliserons les stratégies de composition d’une approche sémantique et fonctionnelle pour établir leurs ressemblances et leurs différences. Nos résultats serviront aux traducteurs, aux rédacteurs techniques et aux étudiants des LSP afin de mieux comprendre certains éléments discursifs de transmission d’information scientifique dans les deux langues