Intelligent recommendation system for e-learning platforms

As more and more digital resources are available, finding the appropriate document becomes harder. Thus, a new kind of tools, able to recommend the more appropriated resources according the user needs, becomes even more necessary. The current project implements an intelligent recommendation system for elearning platforms. The recommendations are based on one hand, the performance of the user during the training process and on the other hand, the requests made by the user in the form of search queries. All information necessary for decision-making process of recommendation will be represented in the user model. This model will be updated throughout the target user interaction with the platform

A new mixed-integer programming model for harvest scheduling subject to maximum area restrictions

Forest ecosystem management often requires spatially explicit planning because the spatial arrangement of harvests has become a critical economic and environmental concern. Recent research on exact methods has addressed both the design and the solution of forest management problems with constraints on the clearcut size, but where simultaneously harvesting two adjacent stands in the same period does not necessarily exceed the maximum opening size. Two main integer programming approaches have been proposed for this area restriction model. However, both encompass an exponential number of variables or constraints. In this work, we present a new integer programming model with a polynomial number of variables and constraints. Branch and bound is used to solve it. The model was tested with both real and hypothetical forests ranging from 45 to 1,363 polygons. Results show that the proposed model’s solutions were within or slightly above 1% of the optimal solution and were obtained in a short computation time

SIDA à data do diagnóstico de infeção por VIH e por evolução de estádio (2009-2018): características dos casos notificados.

Introdução: A utilização de fármacos antirretrovirais altamente eficazes no controlo da infeção por VIH levou à redução da incidência de SIDA em Portugal, contudo esta mantém-se das mais elevadas da União Europeia. Objetivo: Comparar as características dos casos de SIDA concomitantes com o diagnóstico de infeção por VIH, com aqueles resultantes de evolução de estádio (diagnósticos diferidos), na última década. Métodos: Estudo retrospetivo dos casos de SIDA registados na base de dados nacional de vigilância epidemiológica, com diagnóstico de estádio entre 2009 e 2018. Efetuou-se a análise descritiva das características dos casos de acordo com o momento do diagnóstico (concomitante com VIH vs diferido), utilizando o software Epi Info™ (versão 7.2.2.6). Resultados: (ver ficheiro anexo) Conclusão: A maioria dos diagnósticos concomitantes ocorreu em homens heterossexuais reforçando a necessidade de aumentar o diagnóstico precoce neste grupo. A proporção de UDI nos casos com evolução poderá refletir a elevada incidência de VIH neste grupo no passado e uma maior dificuldade de adesão aos cuidados de saúde.info:eu-repo/semantics/publishedVersio

PCMAT, an adaptive learning platform

This paper is about PCMAT, an adaptive learning platform for Mathematics in Basic Education schools. Based on a constructivist approach, PCMAT aims at verifying how techniques from adaptive hypermedia systems can improve e-learning based systems. To achieve this goal, PCMAT includes a Pedagogical Model that contains a set of adaptation rules that influence the student-platform interaction. PCMAT was subject to a preliminary testing with students aged between 12 and 14 years old on the subject of direct proportionality. The results from this preliminary test are quite promising as they seem to demonstrate the validity of our proposal.Fundação para a Ciência e a Tecnologia (FCT), Programa Operacional Factores de Competitividade (COMPETE

Content adaptation for an adaptive hypermedia system

The aim of this paper is presenting the recommendation module of the Mathematics Collaborative Learning Platform (PCMAT). PCMAT is an Adaptive Educational Hypermedia System (AEHS), with a constructivist approach, which presents contents and activities adapted to the characteristics and learning style of students of mathematics in basic schools. The recommendation module is responsible for choosing different learning resources for the platform, based on the user's characteristics and performance. Since the main purpose of an adaptive system is to provide the user with content and interface adaptation, the recommendation module is integral to PCMAT’s adaptation model

[A ∧ P ; P ∧ A] [A AND P ; P AND A]: Architecture and Philosophy, Philosophy and Architecture

This reflection is an attempt to bridge Architecture Philosophy, supported by two main drives: a Wittgensteinian form and a Nietzschean intempestiveness. This means that the final re-sult, besides being fragile, fragmentary, and slightly unorthodox, will only make sense if the reader abandons himself to the proposals to think with the text, accompanying the challenges that each proposition entails, like a peripatetic dialog in a philosophical garden

User modeling In adaptive hypermedia educational systems

This document is a survey in the research area of User Modeling (UM) for the specific field of Adaptive Learning. The aims of this document are: To define what it is a User Model; To present existing and well known User Models; To analyze the existent standards related with UM; To compare existing systems. In the scientific area of User Modeling (UM), numerous research and developed systems already seem to promise good results, but some experimentation and implementation are still necessary to conclude about the utility of the UM. That is, the experimentation and implementation of these systems are still very scarce to determine the utility of some of the referred applications. At present, the Student Modeling research goes in the direction to make possible reuse a student model in different systems. The standards are more and more relevant for this effect, allowing systems communicate and to share data, components and structures, at syntax and semantic level, even if most of them still only allow syntax integration

Sistemas hipermédia adaptativa para suporte de ambientes de aprendizagem construtivistas

Tese de Doutoramento. Engenharia Electrotécnica e de Computadores. Faculdade de Engenharia. Universidade do Porto. 201

Reconstrução do ligamento patelofemoral medial com enxerto autólogo do tendão quadricipital no tratamento da luxação recidivante da patela

ResumoObjetivoAvaliar a eficácia de técnica cirúrgica que usa o tendão do quadríceps como enxerto na reconstrução estática do LPFM.MétodosEstudo de série de casos, prospectivo, do qual participaram 22 pacientes com o diagnóstico de luxação recidivante da patela, que não apresentavam outras alterações anatômicas que necessitassem de tratamento cirúrgico. Os resultados funcionais da técnica foram avaliados por meio de dados clínicos e do questionário de Lysholm, com um ano de pós‐operatório.ResultadosObservou‐se predomínio de pacientes do sexo feminino (86%) e menores de 21 anos (73%), a exemplo do observado na literatura. No primeiro retorno anual após a cirurgia, não houve dor significativa aos médios esforços, perda de amplitude de movimento e positividade dos testes de apreensão. Segundo o questionário empregado, os resultados foram graduados como bons. Aqueles que informaram dor intensa aos maiores esforços apresentavam pendências trabalhistas.ConclusãoA técnica apresentada mostrou, em curto prazo, baixa morbidade e bons resultados funcionais.AbstractObjectiveThe objective of this study was to evaluate the efficacy of the surgical technique using the quadriceps tendon as a graft in static reconstruction of the medial patellofemoral ligament.MethodsThis was a prospective case series study in which the participants were 22 patients with a diagnosis of recurrent patellar dislocation without any other anatomical alterations that required surgical treatment. The functional results from the technique were evaluated using clinical data and the Lysholm questionnaire, one year after the operation.ResultsIt was observed that the patients were predominantly female (86%) and under 21 years of age (73%), just like in the literature. At the first annual return after the surgery, there was no significant pain on medium efforts, no loss of range of motion and a positive apprehension test. According to the questionnaire used, the results were graded as good. The patients who reported having severe pain on greater effort were involved in employment‐related legal disputes.ConclusionThis technique showed low morbidity and good functional results over the short term