Adaptación de la asignatura “tecnología de computadores” al espacio europeo de educación superior.

Este artículo describe la experiencia práctica en la adaptación de la asignatura de Tecnología de Computadores a las nuevas exigencias del EEES (Espacio Europeo de Educación Superior). Esta adaptación se ha realizado dentro del contexto de las acciones emprendidas por la ACSUG (Agencia para la Calidad del Sistema Universitario de Galicia) y la UDC (Universidad de A Coruña) como parte del proceso de convergencia hacia el EEES. La asignatura objeto de la adaptación es una asignatura troncal que se imparte en el primer curso de la titulación de Ingeniería Técnica en Informática de Gestión de la Facultad de Informática de la UDC. Los contenidos de la asignatura se desarrollaban tradicionalmente utilizando fundamentalmente la clase magistral, apoyada por clases de problemas y algunas sesiones prácticas de montaje de circuitos digitales en el laboratorio. La adaptación de la docencia se ha realizado con el objetivo de centrarla más en el alumno, definiendo de forma clara las competencias que estos desarrollarán al cursarla y proponiendo actividades que faciliten su desarrollo. El objetivo de este trabajo es describir como se realizó la adaptación de dicha asignatura, qué materiales y actividades se prepararon, qué dificultades se encontraron, cuáles fueron los objetivos conseguidos y cuál fue la respuesta de alumnos y profesores ante tales cambios.Este artigo descreve a experiência prática na adaptação da disciplina de Tecnologia dos Computadores com as novas exigências do EEES (Espaço Europeu de Ensino Superior). Esta adaptação foi feita no contexto das UDC (Universidade da Corunha) no processo de implementação do EEES. A disciplina objecto da adaptação é uma disciplina obrigatória ministrada no primeiro curso do plano de estudos da Engenharia Técnica em Informática de Gestão da Faculdade de Informática da U circuitos digitais no laboratório. A adaptação foi feita com o objectivo de centrar mais o ensino nos estudantes, definindo claramente as competências que eles vam adquirir e propondo actividades que facilitem o seu desenvolvimento. O objectivo deste artigo é descrever a adaptação realizada na cadeira, que materiais e actividades foram propostas, que dificuldades foram resolvidas, quais os objectivos obtidos e qual a resposta dos estudantes e professores diante de tais mudanças.This article describes the practical experience in the adaptation of the subject of Computer Technology to the new requirements of the EHEA (European Higher Education Area). This adaptation has been conducted within the context of the actions undertaken by the ACSUG (Agency for the quality of the University System of Galicia) and the UDC (University of A Coruña) as part of the process of convergence toward the EHEA. The course's subject of adaptation is a core subject that is taught in the first course of the degree in technical engineering degree in Computer Management from the Faculty of Informatics of the UDC. The content of the subject is traditionally developed using primarily the masterclass, supported by classes of problems and some practical sessions of mounting of digital circuits in the laboratory. The adaptation of teaching has been done with the aim to focus more on the student, by defining clear competencies that they develop the desirable and proposing activities that facilitate their development. The objective of this paper is to describe how you conducted the adaptation of this subject, materials and activities that were prepared, that difficulties were found, what were the goals achieved and what was the response of students and teachers before such changes

Vegetation and the importance of insecticide-treated target siting for control of Glossina fuscipes fuscipes

Control of tsetse flies using insecticide-treated targets is often hampered by vegetation re-growth and encroachment which obscures a target and renders it less effective. Potentially this is of particular concern for the newly developed small targets (0.25 high × 0.5 m wide) which show promise for cost-efficient control of Palpalis group tsetse flies. Consequently the performance of a small target was investigated for Glossina fuscipes fuscipes in Kenya, when the target was obscured following the placement of vegetation to simulate various degrees of natural bush encroachment. Catches decreased significantly only when the target was obscured by more than 80%. Even if a small target is underneath a very low overhanging bush (0.5 m above ground), the numbers of G. f. fuscipes decreased by only about 30% compared to a target in the open. We show that the efficiency of the small targets, even in small (1 m diameter) clearings, is largely uncompromised by vegetation re-growth because G. f. fuscipes readily enter between and under vegetation. The essential characteristic is that there should be some openings between vegetation. This implies that for this important vector of HAT, and possibly other Palpalis group flies, a smaller initial clearance zone around targets can be made and longer interval between site maintenance visits is possible both of which will result in cost savings for large scale operations. We also investigated and discuss other site features e.g. large solid objects and position in relation to the water's edge in terms of the efficacy of the small targets

Renormalization of Quantum Anosov Maps: Reduction to Fixed Boundary Conditions

A renormalization scheme is introduced to study quantum Anosov maps (QAMs) on a torus for general boundary conditions (BCs), whose number ($k$) is always finite. It is shown that the quasienergy eigenvalue problem of a QAM for {\em all} $k$ BCs is exactly equivalent to that of the renormalized QAM (with Planck's constant $\hbar ^{\prime}=\hbar /k$) at some {\em fixed} BCs that can be of four types. The quantum cat maps are, up to time reversal, fixed points of the renormalization transformation. Several results at fixed BCs, in particular the existence of a complete basis of ``crystalline'' eigenstates in a classical limit, can then be derived and understood in a simple and transparent way in the general-BCs framework.Comment: REVTEX, 12 pages, 1 table. To appear in Physical Review Letter

Agronomic treatments to avoid seed presence in `Nadorcott¿ mandarin I. Effect on in vivo pollen tube growth

[EN] Fresh market demands high quality fruit and, therefore, citrus growers and researchers are constantly looking for solutions to avoid seed presence. Current horticultural techniques have low effectiveness or high cost. The objective of this study is to evaluate the inhibition effect of seven products on the in vivo pollen tube growth in Nadorcott mandarin, which is a high-value seedy variety. To achieve this main objective, three inorganic fer­ tilizers (ammonium nitrate, potassium nitrate, sulfur), and four saccharides (saccharose, methyl cellulose, cal­ lose, chitosan) were applied to Nadorcott stigmas 24 h before and after hand pollination. Pollen tubes were counted 1, 3, and 5 days after treatment in longitudinal blue violet autofluorescence-stained sections. Of the seven evaluated products, only sulfur had a strong inhibitory effect. Elemental sulfur (S 8 ) inhibited pollen tube growth by 94-100%. This strong effect was observed regardless of sulfur being applied 24 h before or after pollination, and on fixed flowers 1, 3 or 5 days after applications. Saccharose treatment seemed to have the opposite effect: stimulated pollen tube growth, but the difference with the positive control was small and non- significant. The sulfur effect could be useful for designing agronomic applications capable of preventing seed presence in Nadorcott mandarin.This research was supported by the Asociación Club de Variedades Vegetales Protegidas as part of a project undertaken with the Universitat Politècnica de València (Spain, UPV 20170087), of which H. Merle was the principal researcher. There was no additional external funding received for this study.Garmendia, A.; García-Breijo, F.; Reig, J.; Raigón Jiménez, MD.; Beltrán, R.; Zornoza, C.; Cebrián, N.... (2022). Agronomic treatments to avoid seed presence in `Nadorcott¿ mandarin I. Effect on in vivo pollen tube growth. Scientia Horticulturae. 294:1-10. https://doi.org/10.1016/j.scienta.2021.11076011029

The SPLASH Survey: Kinematics of Andromeda's Inner Spheroid

The combination of large size, high stellar density, high metallicity, and Sersic surface brightness profile of the spheroidal component of the Andromeda galaxy (M31) within R_proj ~ 20 kpc suggest that it is unlike any subcomponent of the Milky Way. In this work we capitalize on our proximity to and external view of M31 to probe the kinematical properties of this "inner spheroid." We employ a Markov chain Monte Carlo (MCMC) analysis of resolved stellar kinematics from Keck/DEIMOS spectra of 5651 red giant branch stars to disentangle M31's inner spheroid from its stellar disk. We measure the mean velocity and dispersion of the spheroid in each of five spatial bins after accounting for a locally cold stellar disk as well as the Giant Southern Stream and associated tidal debris. For the first time, we detect significant spheroid rotation (v_rot ~ 50 km/s) beyond R_proj ~ 5 kpc. The velocity dispersion decreases from about 140 km/s at R_proj = 7 kpc to 120 km/s at R_proj = 14 kpc, consistent to 2 sigma with existing measurements and models. We calculate the probability that a given star is a member of the spheroid and find that the spheroid has a significant presence throughout the spatial extent of our sample. Lastly, we show that the flattening of the spheroid is due to velocity anisotropy in addition to rotation. Though this suggests that the inner spheroid of M31 more closely resembles an elliptical galaxy than a typical spiral galaxy bulge, it should be cautioned that our measurements are much farther out (2 - 14 r_eff) than for the comparison samples.Comment: Accepted for publication in Ap

The Institution of Engineering and Technology

Abstract: In a debate paper, Keel and Bhattacharyya have suggested, by means of simple examples taken from the open literature, that optimal and robust controllers can be fragile in the sense that a minute perturbation in the controller parameters can make the closed-loop system unstable. However, is it true that the optimal and robust controllers presented by Keel and Bhattacharyya are actually fragile? It is demonstrated that the particular parametric stability margin used by Keel and Bhattacharyya can be very conservative and to overcome this problem, two non-conservative measures of controller fragility are proposed. In addition, it will be shown that the examples in Keel and Bhattacharyya's paper are very special and the resulting fragility cannot be linked to the H 1 optimisation but to non-appropriate H 1 optimisation criterions and to bad choice of weights. Introduction In . Different explanations for the fragility problem can be found in the literature. Mäkilä [4] examine Examples 3, 4 and 5 of [1] and present a procedure for assessing the fragility on the basis of the inherent robustness of the closed-loop system to perturbation in the physical parameters that make up implementation, using first-and second-order active RC filters in the implementation of continuous-time controllers and considering the effects of floating point erros in the implementation of digital controllers. More recently, Examples 1 and 2 of [1] have been revisited In spite of all the works listed in the previous paragraph, some questions still remain to be answered. Is it true that the optimal and robust controllers presented in [1] are actually so fragile? More importantly, is it true that the controllers obtained as solutions of the simple optimisation criteria presented in [1] are necessarily fragile? In this paper, these questions are answered and it is demonstrated that the particular stability margin used by Keel and Bhattacharyya can be very conservative and to overcome this problem, two non-conservative measures, based on necessary and sufficient conditions, are proposed here. In addition, it will be shown that the examples presented in [1] are very special and the resulting fragility cannot be associated with H 1 optimisation but to non-appropriate H 1 optimisation criterions and to bad choice of weights. This paper is organised as follows: in section 2, the relative parametric stability margin is reviewed, and an example that suggests the conservativeness of this measure is presented. In section 3, two nonconservative measures of controller fragility are proposed and a comparison between the relative parametric stability margin and the two nonconservative measures introduced in this paper is drawn. In section 4, the examples used in [1] to label H 1 controllers as fragile are re-examined. Finally, conclusions are drawn in section 5. 2 Relative parametric stability margin Definition Consider a closed-loop system with unit negative feedback, wher