On the centralizer of generic braids

We study the centralizer of a braid from the point of view of Garside theory, showing that generically a minimal set of generators can be computed very efficiently, as the ultra summit set of a generic braid has a very particular structure. We present an algorithm to compute the centralizer of a braid whose generic-case complexity is quadratic on the length of the input, and which outputs a minimal set of generators in the generic case.Ministerio de Economía y CompetitividadFondo Europeo de Desarrollo Regiona

Are You Ready for the Age of Artificial Intelligence?

We can never be sure what will happen in the future when science and technology improve, social output increases, and large amounts of data abound. Artificial intelligence is permeating every aspect of our daily life. In the face of ambiguity, we are unable to provide an accurate response. Although like this, AI is unable to grasp the complexity of human ideology. Scientific and technological information must be absorbed at all times. If you don’t change yourself, this era will change you

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

Validation of suply chain integration scales and the effect that size, level of vertical integration, industry and country have on their value

Academic literature would appear to indicate that supply chain integration is a major factor in explaining the performance of companies. The results are nevertheless inconclusive. Certain authors put forward the idea that the vast range of results obtained are due, amongst other things, to the fact that there is no exactness to the group of scales used, no-one has yet published an analysis of the measurement models nor clear benchmarks. In this paper, we present the theoretical definition of four supply chain integration scales (clients, suppliers, external and internal) and the convergent and discriminant validity of a measurement instrument based on a list of items taken from earlier papers. We also propose a benchmark to interpret the scales by percentiles, using a diverse international sampling broken down into sub-samples based on sector, type of company, size of company and degree of vertical integration.Ministerio de Ciencia e Innovación DPI2010-18243Ministerio de Educación y Ciencia DPI2006-0553

“Zombie attack” a new way to teach Chemistry

The Higher Education requires new models which allow training people able to adapt and survive in changing environments. It is based on the use of technologies and the adaptation of knowledge to people. It is about an education according to circumstances, which is adapted to context and virtual behaviour of people. One of the main difficulties that lecturers find in the classroom is how to maintain students' attention and interest in their subject, especially when students also think that the subject is not important for their training. In order to motivate these students, innovation in educational techniques and methodologies, such as experiential learning, are progressively being imposed to and/or coordinated with the traditional ones. Escape Room is a very modern concept in education, based on the development of mental skills for the solution of enigmas and problems. It is a tool to develop the cooperative, cognitive, deductive and logical reasoning skills of the students. In this work, an educational gamification experience based on the escape room concept is presented. The students have 1 hour and 30 minutes to carry out this activity. They will have to solve four puzzles and enigmas that will give them the key to open a treasure chest and finally let them escape from the classroom. Logic, ingenuity and teamwork will allow participants to develop not only chemical competence, but also other basic skills. The story that is told throughout the escape room is a zombie attack: the city has been infected (with a virus) and only the occupants of the room where the activity takes place have not been infected. In addition, they can all protect themselves if they are able to open the chest where the antidote is located. The aim of this activity is to enhance the knowledge acquired throughout the semester as well as the development of skills.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Histone Mutants Separate R Loop Formation from Genome Instability Induction

R loops have positive physiological roles, but they can also be deleterious by causing genome instability, and the mechanisms for this are unknown. Here we identified yeast histone H3 and H4 mutations that facilitate R loops but do not cause instability. R loops containing single-stranded DNA (ssDNA), versus RNA-DNA hybrids alone, were demonstrated using ssDNA-specific human AID and bisulfite. Notably, they are similar size regardless of whether or not they induce genome instability. Contrary to mutants causing R loop-mediated instability, these histone mutants do not accumulate H3 serine-10 phosphate (H3S10-P). We propose a two-step mechanism in which, first, an altered chromatin facilitates R loops, and second, chromatin is modified, including H3S10-P, as a requisite for compromising genome integrity. Consistently, these histone mutations suppress the high H3S10 phosphorylation and genomic instability of hpr1 and sen1 mutants. Therefore, contrary to what was previously believed, R loops do not cause genome instability by themselves.European Research Council ERC2014 AdG669898Ministerio de Economía y Competitividad BFU2013-42918-P, BFU2016-75058-

La aportación del proyecto de comunidades de aprendizaje a la transformación social y educativa de un barrio: La experiencia de La Estrella-La Milagrosa en Albacete

En este artículo se presentan las aportaciones que el proyecto de Comunidades de aprendizaje está realizando a la transformación social y educativa de los barrios La Estrella y La Milagrosa. Se explica el importante papel que han tenido los centros educativos de estos barrios y como el modelo comunitario, que se está implantando en las actuaciones sociales y educativas, se ha visto enriquecido por las aportaciones de los programas Inclu-ed y Urbanitas. También se describe como este proceso ha conducido a la construcción de un Proyecto Educativo de los Barrios La Estrella y La Milagrosa que está permitiendo realizar un trabajo comunitario y dialógico entre el profesorado de los centros, familiares, entidades e instituciones de Albacet

Control espacial de un dedo antropomorfo

Los problemas de la cinemática inversa de manipuladores redundantes han sido investigados desde hace muchos años. La cinemática inversa es computacionalmente complicada y puede traer retardos significativos en el control en tiempo real. Para un robot redundante, cálculos adicionales son requeridos para la solución de la cinemática inversa a través de esquemas de optimización. Recientemente, las redes neuronales han sido ampliamente usadas en el control de robots, debido a que son rápidas, toleran fallos y son capaces de aprender. Basado en el hecho que los humanos no calculan exactamente la cinemática inversa, pero pueden hacer posicionamientos precisos de forma heurística, nosotros desarrollamos un mapeo de la cinemática inversa a través de una red neuronal difusa. La implementación del esquema propuesto ha demostrado que es factible que cuando existen los casos de redundancia y no redundancia, sea muy eficientemente computacional. El algoritmo presentado realiza las transformaciones espaciomotoras y las motoras-espacial. Simulaciones sobre un dedo antropomorfo se llevaron a acabo para evaluar el desarrollo de la red neurodifusa.Se agradece el apoyo recibido por los miembros del grupo de investigación de Neurotecnología, Control y Robótica (NEUROCOR) del departamento de Ingeniería de Sistemas y Automática de la Universidad Politécnica de Cartagena. Este trabajo fue financiado en parte por la CICYT-TIC99- 0446-C02-01, y por el proyecto PALOMA -IST- 2001-33073- de Investigación Básica

Problemas relativos a la evaluación investigadora de los profesores universitarios del área de Biblioteconomía y Documentación

En el ámbito de la cultura de la evaluación, los estudiosos y profesionales se ven sometidos cada vez más al juicio crítico de su actividad investigadora. En el presente artículo se enumeran los diversos estadios en que dicha actividad es evaluada por las distintas administraciones públicas; se estudian los criterios de evaluación más habitualmente empleados, entre los que figuran la evaluación por expertos iguales (peer review); las revistas de reconocido prestigio y las normas para evaluar las tesis doctorales. Finalmente, el autor postula un nuevo criterio: el análisis de las citas de calidad recibidas por los autores sometidos a evaluación a fin de conocer la auténtuica aportación a su campo científico.It is a fact of today’s scientific culture that the quality of research carried out by academics and professionals is being continuously assessed. This article reviews the various stages in which this research activity is assessed by the different public administrations and analyses the most popular evaluation methods employed, including peer review, publication in prestigious journals and the normative criteria required to evaluate the quality of doctoral dissertations. Finally, the author proposes a new set of evaluation criteria based on quality citation received by the authors undergoing the assessment with a view to determining their real contribution to their scientific field

Evaluación del desempeño de los egresados de maestría en salud pública del Centro de Investigaciones y Estudios de la Salud y su relación con la formación profesional CIES. Períodos 1997 al 2001.

Se encontró que los egresados de la MSP del CIES se encuentran ocupando cargos de relevancias dentro del sistema de salud como fuera de él; la mayoría de los encuestados trabaja para el Ministerio de Salud y desempeñan cargos administrativos en el nivel central, SILAIS, Centro de Salud, Puesto de Salud. La enseñanza modular que ofrece el CIES, es reconocida como una metodología de educación integral que rompe con el paradigma tradicional de la formación profesional. Los contenidos programáticos de los planes de Estudio son pertinentes con las funciones que desempeñan como egresados y que están contenidos en dichos planes. La relación teórica-práctica de la maestría por encuentros enriquece el estudio de los alumnos y vincula al CIES con los centros de trabajo de los mismos. Existe una mediana correspondencia entre las funciones del egresado con su cargo y especialidad, lo que limita la claridad de las responsabilidades que debe de desempeñar como salubrista. En las instituciones empleadoras no se encontró evidencias que valoren y reconozcan el desempeño de los salubristas. Tampoco ofrecen las condiciones de trabajo adecuadas, ni materiales, ni económicas suficientes para el trabajo del salubrista. En cuanto a las temáticas del Marketing sanitario, Economía de la Salud y aspectos jurídicos de salud, son insuficientes para el desempeño de los egresados. Los años de experiencia y calificación académica de los docentes en cuanto a conocimiento científico-técnico esta acorde con las exigencias de la institución. En síntesis, y de acuerdo a las Discrepancias encontradas, se puede afirmar que hay una correspondencia entre los programas académicos y el perfil de egresado y entre éste con sus desempeños, el mercado y su ubicación laboral, lo que proyecta el rol que está jugando el CIES en la promoción de la Salud Pública