Using simulation to compare Aircraft Boarding Strategies

The boarding process has a very important role in t he objective of increase the efficiency, profitability, and customer satisfaction of an airline industry. It is one of the significant elements of the turnaround time, a slow boarding process might lead to financial issues to the company and, of course, cu stomer complaints. In this paper are analyzed three boarding strategies presenting a model and an easy to use tool that implements it. The study suggest that differences exists among them, and proposes the most efficient strategy.Peer ReviewedPostprint (published version

Teaching and Learning of Mathematics: The Need for a Multidisciplinary Analysis

Resumen: El logro y aprendizaje exitoso en matemáticas sigue siendo un desafío a nivel mundial, y se realizan grandes esfuerzos para avanzar en propuestas de mejora, generalmente involucran al profesorado, en términos de su formación, perfeccionamiento o práctica de aula. Los esfuerzos también se orientan hacia el examen del rol de diversas variables o factores que pueden predecir o relacionarse con un mejor nivel de aprovechamiento de esta materia escolar. Todo ello revela el carácter complejo y multifactorial de la enseñanza y aprendizaje de las matemáticas, que obliga a los diversos agentes educativos e investigadores a avanzar y profundizar aún más en su estudio. Con la finalidad de contribuir al examen crítico y empírico de algunas variables contextuales o socio cognitivas asociadas al aprendizaje de las matemáticas o la resolución de problemas, como también al examen de algunas propuestas de innovación en el área y la evaluación de su impacto en algunas competencias o habilidades matemáticas, se presenta un conjunto de trabajos derivados de la investigación de grupos de investigación de amplia y destacada trayectoria en el área. El presente número monográfico de la revista Psychology, Society and Education, reúne un total de diez artículos cuyo objetivo principal es contribuir con evidencia y alternativas de análisis a un área del aprendizaje escolar asociada generalmente con altos niveles de fracaso y emociones negativas. Teaching and Learning of Mathematics: The Need for a Multidisciplinary AnalysisAbstract: Success in learning mathematics remains a global challenge, and great efforts are being made to advance proposals for improvement, generally involving teachers in terms of their training, improvement or classroom practice. Efforts are also oriented toward examining the role of various variables or factors that can predict or relate to a better level of achievement of this school subject. All this reveals the complex and multifactorial nature of the teaching and learning of mathematics, which obliges the various educational agents and researchers to go further and deepen their study. In order to contribute to the critical and empirical examination of some contextual or socio-cognitive variables associated with learning mathematics or problem solving, as well as to the examination of some innovation proposals in the area and the evaluation of their impact on some competences Or mathematical skills, a set of papers derived from the research of research groups of wide and outstanding trajectory in the area is presented. The present issue of the journal Psychology, Society and Education, brings together a total of ten articles whose main objective is to contribute evidence and analysis alternatives to an area of school learning generally associated with high levels of failure and negative emotions.</jats:p

Theory of Mind in Alzheimer Disease

Introduction The ability to understand and attribute mental states, including intentions, knowledge and desires, to both ourselves and other people, is referred to as possession of a ‘Theory of Mind’ (ToM). Some studies have revealed an association between ToM abilities and Executive Functioning (EF) capacities Although many types of research had documented executive dysfunction in Alzheimer Disease (AD), the link between executive functions (EFs) and ToM is not yet fully studied in AD. Therefore the main aim of the present study is to know if patients with early AD are able to resolve a First Order False belief task. Method A total of 22 patients with early Alzheimer´s disease were recruited into the study from a dementia speciality clinic in Zaragoza, Spain. In this study, we tested a first-order belief task. Executive function was assessed using “Executive functions and frontal lobes test” (BANFE-2)

Produção midiática em educomunicação : uma vertente a ser construída

A educomunicação, com base nos estudos defendidos pelo CCA-ECA/USP1, se constituiu a partir de quatro vertentes diferenciadas na interface Comunicação/Educação, sendo: (1) Gestão da Comunicação em espaços educativos; (2) Educação para e pela comunicação; (3) Mediação Tecnológica na Educação e (4) Investigação epistemológica da relação Comunicação/Educação. Ao longo do tempo, novos objetos de estudos se evidenciaram neste campo emergente, sendo que um dos mais recentes, é identificado como a Produção Midiática na Educação. A questão que aqui se coloca é se podemos, efetivamente, defender a existência de uma abordagem genuinamente educomunicativa na produção de mídias. A hipótese será testada com base na análise de produções educomunicativas em busca de elementos que possam comprovar esta idiossincrasia epistemológica. Nossa investigação adotará a metodologia participante, explorando o corpus das produções desenvolvidas na disciplina “CCA 0303-Práticas Laboratoriais em Multimídia” na qual são abordados os aspectos teóricos e práticos do trabalho do educomunicador enquanto produtor de mídia educativa. Ao final, esperamos contribuir para a consolidação de um modus faciendi específico da Produção Multimídia em projetos e atividades educomunicativas visando aprimorar a formação do educomunicador em consonância com as demandas atuais da educação em contextos formais, não-formais e informai

Alteraciones fisarias tras radiación láser

Ante el auge actual de la radiación láser y al no encontrar bibliografía referente al posible efecto sobre el cartílago de crecimiento, hemos decidido hacer una valoración del mismo en un modelo experimental. Se utilizaron 50 ratas, estableciéndose cinco grupos de estudio de 10 animales cada uno, dependiendo de la dosis de radiación aplicada percutáneamente sobre la fisis femoral distal. Tras el estudio ultraestructural, histoquímico y morfométrico, hemos observado una serie de alteraciones indicadoras de un daño celular directo. Los hallazgos permiten concluir que este tipo de radiación está contraindicado absolutamente durante la fase de crecimiento óseo o en el esqueleto inmaduro.In view of the present importance of Laser Radiation, and due to the lack of references about its effects on the growth cartilage, we designed an experimental model in order to asses it. A total of 50 rats were used, establishing five groups of study at 10 animals each, depending on the dosis of radiation applied percutaneously on the distal femoral phisys. After the structural, histochemical and morphometric study, we observed a series of alterations indicating a direct celular damage at the physion. From the results, it is concluded that laser radiation should be on absolute contraindication during the phase of bone growth or in the inmature skeleton

Review of real-life teduglutide experience

Background: teduglutide is an agonist of glucagon-related peptide (aGLP2) effective as a treatment for patients with short bowel syndrome (SBS), an entity that affects quality of life, usually requires home parenteral nutrition (HPN) and generates significant health costs. The objective of the present narrative review was to assess the real-life experience reported with teduglutide.Methods and results: in real life, one meta-analysis and studies published with 440 patients indicate that Teduglutide is effective after the period of intestinal adaptation after surgery, reducing the need for HPN and in some cases even allowing it to be suspended. The response is heterogeneous, increasing progressively up to 2 years after the start of treatment and reaching 82 % in some series. The presence of colon in continuity is a negative predictor of early response, but a positive predictive factor for the withdrawal of HPN. The most common side effects are gastrointestinal in the early stages of treatment. There are late complications related to the stoma or the occurrence of colon polyps, although the frequency of the latter is very low. In adults, data on improved quality of life and cost-effectiveness are scarce.Conclusions: teduglutide is effective and safe and data from pivotal trials for the treatment of patients with SBS are confirmed in real life and can reduce or even stop HPN in some cases. Although it seems cost-effective, more studies are needed to identify those patients with the greatest benefit

Applying Prolog to Develop Distributed Systems

Development of distributed systems is a difficult task. Declarative programming techniques hold a promising potential for effectively supporting programmer in this challenge. While Datalog-based languages have been actively explored for programming distributed systems, Prolog received relatively little attention in this application area so far. In this paper we present a Prolog-based programming system, called DAHL, for the declarative development of distributed systems. DAHL extends Prolog with an event-driven control mechanism and built-in networking procedures. Our experimental evaluation using a distributed hash-table data structure, a protocol for achieving Byzantine fault tolerance, and a distributed software model checker - all implemented in DAHL - indicates the viability of the approach

Impact of students' perception of school social environment on their mathematical academic performance

Resumen: Esta investigación se inscribe dentro de las nuevas líneas de investigación que abordan la influencia de los factores contextuales sobre el rendimiento escolar en matemáticas. En particular, se examina si la percepción que tienen los alumnos acerca de diversas dimensiones de la convivencia escolar tiene incidencia en su logro académico. La muestra de estudio estuvo compuesta por 314 estudiantes chilenos. Los modelos de regresión ordinal y logística, muestran el impacto negativo sobre el rendimiento escolar en matemáticas que tienen las dimensiones de Agresión e Indisciplina del constructo convivencia escolar, especialmente para el grupo femenino que asiste a establecimientos escolares de mayor vulnerabilidad social. Se discuten las implicaciones y proyecciones de estos resultados para gestión del profesorado de matemáticas al interior del aula escolar, como también, de las autoridades y agentes de políticas educativas. Impact of students' perception of school social environment on their mathematical academic performance Abstract:This study involves a new line of research related to the influence of contextual factors on school performance in mathematics. Specifically, it examines whether the students' perception of different aspects of the school environment has an impact on their academic achievement. The study sample was comprised of 314 Chilean students. Ordinal and logistic regression models revealed a negative impact on school performance in mathematics for the dimensions of Aggression and Indiscipline of the school environment construct, especially for female students who attend schools of high vulnerable social contexts. We discuss the implications and importance of these results in order to improve the math teaching process within the classroom setting, and also to inform authorities who are responsible for establishing educational policies.</jats:p