Simposio : modelos de formación del profesorado de ciencias

La formación del profesorado ha experimentado en los últimos años cambios muy importantes. Estos cambios están intentando conseguir una formación más centrada en los problemas y necesidades del profesorado y una mayor repercusión en las aulas. El presente Simposio pretende compartir y contrastar los objetivos, fundamentos teóricos, metodologías y resultados de diferentes programas de formación del profesorado de ciencias de infantil, primaria y secundaria que se están llevando a cabo en tres países: Portugal, México y España

Managing Waiting Times to Predict No-shows and Cancelations at a Children’s Hospital

Purpose: Since long waits in hospitals have been found to be related to high rates of no-shows and cancelations, managing waiting times should be considered as an important tool that hospitals can use to reduce missed appointments. The aim of this study is to analyze patients’ behavior in order to predict no-show and cancelation rates correlated to waiting times. Design/methodology/approach: This study is based on the data from a US children’s hospital, which includes all the appointments registered during one year of observation. We used the call-appointment interval to establish the wait time to get an appointment. Four different types of appointment-keeping behavior and two types of patients were distinguished: arrival, no-show, cancelation with no reschedule, and cancelation with reschedule; and new and established patients. Findings: Results confirmed a strong impact of long waiting times on patients’ appointment-keeping behavior, and the logarithmic regression was found as the best-fit function for the correlation between variables in all cases. The correlation analysis showed that new patients tend to miss appointments more often than established patients when the waiting time increases. It was also found that, depending on the patients’ appointment distribution, it might get more complicated for hospitals to reduce missed appointments as the waiting time is reduced. Originality/value: The methodology applied in our study, which combines the use of regression analysis and patients’ appointment distribution analysis, would help health care managers to understand the initial implications of long waiting times and to address improvement related to patient satisfaction and hospital performance.Peer Reviewe

Использование государственных гарантий испанскими банками: насколько это объяснимо предкризисными балансовыми показателями

When some European governments suddenly became guarantors of a huge amount of money in bank bonds, many questions arose as to what on the determinants and impacts of the government guarantees’ using. In this paper, we address some of these issues by an in-depth examination of the Spanish government guarantee program 2008–09. First of all, we provide an overview of its context, given by the unique vulnerability of the Spanish banking system to the financial crisis, and by the bank support policies adopted by OECD nations to combat the crisis. Then the Spanish debt guarantee scheme is described: program size, guarantee features, eligible institutions and instruments, fees. Fi-nally, the relationship between the risk of financial entities and guaranteed sums is examined. From this analysis, two conclusions can be drawn: first, that higher risk ratios tend to be correlated with a higher dependency on government guarantees; second, that different kinds and/or measures of risk affect the level of government guarantees in different ways.Когда некоторые европейские правительства внезапно выступили гарантами огромных денежных сумм в банковских облигациях, возникло множество вопросов относительно определяющих факторов и воздействия государственных гарантий. Авторами рассматриваются некоторые из этих вопросов на примере программы государственных гарантий Испании на 2008–2009 гг. Дается обзор ситуации с учетом беспрецедентной уязвимости испанской банковской системы в условиях финансового кризиса и политики поддержки банков, утвержденной государствами-членами ОЭСР для борьбы с кризисом. Представлено описание испанской схемы гарантий погашения долгов: объем программы, характеристика гарантий, правомочные институты и инструменты, пошлины. Рассматривается взаимосвязь между финансовыми учреждениями и гарантированными суммами. Настоящий анализ позволяет сделать два вывода: во-первых, коэффициенты повышенного риска, как правило, связаны с более высокой зависимостью от государственных гарантий; во-вторых, разные виды и (или) меры в отношении рисков воздействуют различным образом на уровень государственных гарантийS

Química i Sostenibilitat

Quan es va decidir proclamar 2011 com l'Any Internacional de la Química, el aleshores Director General d'UNESCO va assenyalar que "Sensibilitzar al públic de la importància de les ciències químiques és una tasca de gran rellevància, pels reptes que ha d'afrontar el desenvolupament sostenible. És indubtable que la Química jugarà un paper molt important en el desenvolupament de fonts alternatives d'energia i l'alimentació de la creixent població mundial". Segons el president en aquests moments de l'IUPAC, amb aquesta celebració esperaven augmentar l'apreciació pública i la comprensió de la Química, augmentar l' interès dels joves per la ciència i generar entusiasme per un futur de creativitat relacionada amb la Química

A Semi-Distributed Electric Demand-Side Management System with PV Generation for Self-Consumption Enhancement

This paper presents the operation of an Electrical Demand-Side Management (EDSM) system in a real solar house. The use of EDSM is one of the most important action lines to improve the grid electrical efficiency. The combination between the EDSM and the PV generation performs a new control level in the local electric behavior and allows new energy possibilities. The solar house used as test-bed for the EDSM system owns a PV generator, a lead-acid battery storage system and a grid connection. The electrical appliances are controllable from an embedded computer. The EDSM is implemented by a control system which schedules the tasks commanded by the user. By using the control system, we define the house energy policy and improve the energy behavior with regard to a selected energy criterion, self-consumption. The EDSM system favors self-consumption with regard to a standard user behavior and reduces the energy load from the grid

Sobolev spaces of vector-valued functions

We are concerned here with Sobolev-type spaces of vector-valued functions. For an open subset $\Omega\subset\mathbb{R}^N$ and a Banach space $V$, we compare the classical Sobolev space $W^{1,p}(\Omega, V)$ with the so-called Sobolev-Reshetnyak space $R^{1,p}(\Omega, V)$. We see that, in general, $W^{1,p}(\Omega, V)$ is a closed subspace of $R^{1,p}(\Omega, V)$. As a main result, we obtain that $W^{1,p}(\Omega, V)=R^{1,p}(\Omega, V)$ if, and only if, the Banach space $V$ has the Radon-Nikod\'ym propert

Las energías renovables, concretamente la eólica, y el Impuesto sobre Transmisiones Patrimoniales

There are solid grounds on which to defend the idea that the administrative authority under which rights are recognized installation of wind turbine for electricity production is not subject to ITP, and he's not only not under lack of administrative concession in the strict sense, but also hint of activity of social benefits of public services, or comparable-in production, or wind power generation.Existen razones sólidas sobre las cuales defender la idea de que la autorización administrativa en virtud de la cual se reconocen derechos de instalación de parques de aerogeneradores para la producción de energía eléctrica no está sujeta al ITP, y no lo está no solo en virtud de la inexistencia de concesión administrativa en sentido estricto, sino tampoco de atisbo alguno de actividad prestacional de servicios públicos –o equiparables– en la producción, o sea, generación de energía eólica

Kinetics of Carboxylmethylation of the Charge Isoforms of Myelin Basic Protein by Protein Methyltransferase II

The charge isoforms (C1-C5) of bovine myelin basic protein (MBP) were used as substrates for the rat brain enzyme protein carboxylmethyltransferase (PM II). The objective of these experiments was to ascertain whether the kinetic behavior of the MBP isoforms reflected differences in the structures of this molecular family. Initial velocity plots as a function of the MBP-isoform concentration showed significnt differences ( p > 0.05) among the assayed isoforms except for isoforms C2 and C4. Under the conditions of our experiment all the curves exhibited a consistent sigmoidicity. The kinetic data were best fitted by a model, previously described for the enzyme D-Β-hydroxybutyrate dehydrogenase, in which two independent sites must be randomly occupied before any catalytic activity can occur. This mechanism is substantially different from that proposed by other investigators for similar PM II enzymes and other substrates. The differences in the rates of isoform carboxylmethylation are largely accounted for by the different apparent dissociation constants K s and is explained on the basis of inherent structural differences among the charge isoforms.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65821/1/j.1471-4159.1989.tb09257.x.pd