Clustering search

This paper presents the Clustering Search (CS) as a new hybrid metaheuristic, which works in conjunction with other metaheuristics, managing the implementation of local search algorithms for optimization problems. Usually the local search is costly and should be used only in promising regions of the search space. The CS assists in the discovery of these regions by dividing the search space into clusters. The CS and its applications are reviewed and a case study for a problem of capacitated clustering is presented.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal do MaranhãoUniversidade Federal de São Paulo (UNIFESP)Instituto Nacional de Pesquisas EspaciaisUNIFESPSciEL

GLOSSÁRIO DINÂMICO DE LIBRAS PARA APOIO AO ENSINO NÃO PRESENCIAL

Há grande crescimento na demanda por cursos não presenciais recentemente no país. Os cursos a distância têm alcançando um público bastante diversificado e sujeito a particularidades. Para diminuir as barreiras entre os alunos especiais surdos que desejam adquirir conhecimento nesta modalidadede ensino, desenvolveu-se um objeto de aprendizagem que, por meio de um glossário de LIBRAS, vem permitir uma maior integração dos surdos em ambientes virtuais de aprendizagem. O glossário permiteo cadastro de vídeos, a inserção de imagens e informações, tais como localidade de origem, categoriae descrição de como o sinal é realizado. O glossário tem um papel periférico no ambiente, mas permite que alunos surdos possam definir e redefinir significados para sinais, inclusive aqueles relacionados à disciplina objeto do estudo a distância.Palavras-chave: Acessibilidade. LIBRAS. SCORM. EAD. AVA. Moodle.DYNAMIC LIBRAS GLOSSARY FOR E-LEARNING SUPPORTABSTRACT: There is a large growth in demand for e-learning courses in the country recently. Those courseshave reached a very diversified audience, subject to individualities. To decrease the barriers among deaf students who wish to get special knowledge in that modality of learning, it was developed a learning object, that through a glossary of LIBRAS, may permit more accessibility of the deaf students in virtual learning environment. The glossary allows videos registration, inclusion of pictures and information, such as origin location, category and description of how the signal is done. The glossary has a peripheral role in the environment, however it permits that deaf students can define and redefine meanings to the signs, including those related to the chosen e-learning subject.KEYWORDS: Accessibility. LIBRAS. SCORM. D-Learning. VLE. Moodle.GLOSARIO DINÁMICO DE LIBRAS EN APOYO A LA EDUCACIÓN A DISTANCIARESUMEN: Hay un gran aumento de la demanda de cursos a distancia recientemente en el país, llegandoa una audiencia muy diversificada y sujeto a individualidades. Para reducir las barreras entre los estudiantes sordos que desean adquirir conocimientos en forma de educación a distancia se desarrolló un objeto de aprendizaje, que por medio de un glosario LIBRAS, permite una mayor integración entre los sordos en entornos virtuales de aprendizaje. El glosario permite la inclusión de videos, imágenes, informacionescomo el sitio de origen, clasificación y descripción de cómo son hechas las señales.PALABRAS CLAVE: LIBRAS. SCORM. EAD. EVA. Moodle

Ferramenta SCORM Dinâmica para auxiliar o ensino de Libras

Há um grande crescimento na demanda por cursos não presenciais recentemente no país, alcançando um público bastante diversificado e sujeito a individualidades. Para diminuir as barreiras entre os alunos especiais surdos que desejam adquirir conhecimento na modalidade de ensino à distância desenvolveu-se um objeto de aprendizagem (OA) SCORM, que por meio de um glossário de LIBRAS, dar ao Ambiente Virtual de Aprendizagem(AVA) MOODLE mais acessibilidade. Os sinais do glossário são cadastrados via links completos de vídeos do YouTuBe, e permitem a inserção de imagens e a inclusão da região de origem do Sinal, categoria, e descrição de como ele é feito para futuras melhorias do trabalho

Low-dimensional space modeling-based differential evolution for large scale global optimization problems

Large-Scale Global Optimization (LSGO) has been an active research field. Part of this interest is supported by its application to cutting-edge research such as Deep Learning, Big Data, and complex real-world problems such as image encryption, real-time traffic management, and more. However, the high dimensionality makes solving LSGO a significant challenge. Some recent research deal with the high dimensionality by mapping the optimization process to a reduced alternative space. Nonetheless, these works suffer from the changes in the search space topology and the loss of information caused by the dimensionality reduction. This paper proposes a hybrid metaheuristic, so-called LSMDE (Low-dimensional Space Modeling-based Differential Evolution), that uses the Singular Value Decomposition to build a low-dimensional search space from the features of candidate solutions generated by a new SHADE-based algorithm (GM-SHADE). GM-SHADE combines a Gaussian Mixture Model (GMM) and two specialized local algorithms: MTS-LS1 and L-BFGS-B, to promote a better exploration of the reduced search space. GMM mitigates the loss of information in mapping high-dimensional individuals to low-dimensional individuals. Furthermore, the proposal does not require prior knowledge of the search space topology, which makes it more flexible and adaptable to different LSGO problems. The results indicate that LSMDE is the most efficient method to deal with partially separable functions compared to other state-of-the-art algorithms and has the best overall performance in two of the three proposed experiments. Experimental results also show that the new approach achieves competitive results for non-separable and overlapping functions on the most recent test suite for LSGO problems

Panorama das Intervenções Coronárias Percutâneas em Oclusões Totais Crônicas em Centros Participantes do LATAM CTO Registry no Brasil

Background: Major advances have been seen in techniques and devices for performing percutaneous coronary interventions (PCIs) for chronic total occlusions (CTOs), but there are limited real-world practice data from developing countries. Objectives: To report clinical and angiographic characteristics, procedural aspects, and clinical outcomes of CTO PCI performed at dedicated centers in Brazil. Methods: Included patients underwent CTO PCI at centers participating in the LATAM CTO Registry, a Latin American multicenter registry dedicated to prospective collection of these data. Inclusion criteria were procedures performed in Brazil, age 18 years or over, and presence of CTO with PCI attempt. CTO was defined as a 100% lesion in an epicardial coronary artery, known or estimated to have lasted at least 3 months. Results: Data on 1196 CTO PCIs were included. Procedures were performed primarily for angina control (85%) and/or treatment of moderate/severe ischemia (24%). Technical success rate was 84%, being achieved with antegrade wire approaches in 81% of procedures, antegrade dissection and re-entry in 9%, and retrograde approaches in 10%. In-hospital adverse cardiovascular events occurred in 2.3% of cases, with a mortality rate of 0.75%. Conclusions: CTOs can be treated effectively in Brazil by using PCI, with low complication rates. The scientific and technological development observed in this area in the past decade is reflected in the clinical practice of dedicated Brazilian centersinfo:eu-repo/semantics/publishedVersio

Desafios e Implicações do Uso de Psicoestimulantes entre Estudantes: Uma Análise Crítica da Literatura

This paper presents a literature review on the use of psycho stimulants by college students. Through a comprehensive analysis of scientific articles, the prevalence, motivations, consequences, and trends of this behavior were investigated. The results highlight the significant prevalence of non-medical use of psycho stimulants among college students, as well as the varied motivations behind this behavior, including the pursuit of academic performance enhancement. However, risks to physical and mental health, as well as ethical and academic concerns associated with the use of these substances, were also identified. This work emphasizes the importance of comprehensive, evidence-based approaches to prevent and reduce non-medical use of psycho stimulants among college students, aiming to promote a healthy and safe academic environment.Este trabalho apresenta uma revisão da literatura sobre o uso de psicoestimulantes por estudantes universitários. Através de uma análise abrangente de artigos científicos, foram investigadas a prevalência, motivações, consequências e tendências desse comportamento. Os resultados destacam a prevalência significativa do uso não médico de psicoestimulantes entre estudantes universitários, bem como as motivações variadas que levam a esse comportamento, incluindo a busca por melhoria do desempenho acadêmico. No entanto, também foram identificados riscos à saúde física e mental, bem como preocupações éticas e acadêmicas associadas ao uso dessas substâncias. Este trabalho ressalta a importância de abordagens abrangentes e baseadas em evidências para prevenir e reduzir o uso não médico de psicoestimulantes entre estudantes universitários, visando promover um ambiente acadêmico saudável e seguro

2-Opt Population Training for Minimization of Open Stack Problem

This paper describes an application of a Constructive Genetic Algorithm (CGA) to the Minimization Open Stack Problem (MOSP). The MOSP happens in a production system scenario, and consists of determining a sequence of cut patterns that minimizes the maximum number of opened stacks during the cutting process. The CGA has a number of new features compared to a traditional genetic algorithm, as a population of dynamic size composed of schemat a and structures that is trained with respect to some problem specific heuristic. The application of CGA to MOSP uses a 2-Opt like heuristic to define the fitness functions and the mutation operator. Computational tests are presented using available instances taken from the literature