Recursos de colección

Repositorio da Universidade dos Açores (8.397 recursos)

O Repositório Institucional da Universidade dos Açores desenvolvido no âmbito do projecto RCAAP.

DM - Artigos em Revistas Internacionais / Articles in International Journals

Mostrando recursos 1 - 20 de 25

  1. Dairy farming systems' adaptation to climate change

    Silva, Emiliana; Mendes, Armando B.; Rosa, Henrique José Duarte
    The measure of climate change in dairy farms can be achieved by using the emissions of methane by the ruminants converted in CO2 equivalent (CO2-eq). In order to know the impact of future quotes of methane in the Azorean dairy milk farms, a decision model is built to the Azorean intensive grazing system of dairy farms. Some scenarios of methane levels reductions from 10 to 75% are considered and their impact is evaluated upon dairy farms income, level of CO2-eq emissions and intensity level of grazing system. The results have shown that any reduction of the methane level always implies...

  2. Pisando arte e matemática em Lisboa

    Carvalho, Alda; Santos, Carlos Pereira; Silva, Jorge Nuno; Teixeira, Ricardo Emanuel Cunha
    Tema do Dossier Temático ARTE E GEOMETRIA: TEORIAS, APLICAÇÕES E DERIVAÇÕES.

  3. Statistical Analysis of the Leadership Perceptions in a Public Administration Office

    Sousa, Áurea; Batista, Maria da Graça Câmara; Arruda, Ana C.
    This Journal is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

  4. Entrepreneurship Promotion in Higher Education Institutions

    Sousa, Áurea; Couto, Gualter; Branco, Nélia Cavaco; Silva, Osvaldo; Bacelar-Nicolau, Helena
    The importance of entrepreneurship promotion has increased significantly in today's society, especially during periods of crises. This work is based on the responses obtained through a survey conducted on a sample of 305 undergraduates of the University of the Azores, enrolled in different science programs. The aim is to deepen the knowledge of the entrepreneurial propensity of higher education students in the Azores, and in that way the university can stimulate their interest in creating businesses. The main results obtained, using exploratory data analysis (from the univariate to the multivariate), are presented and discussed.

  5. Big Data in SATA Airline : finding new solutions for old problems

    Mendes, Armando B.; Guerra, Hélia; Gomes, Luís Mendes; Oliveira, Ângelo; Cavique, Luís
    With the rapid growth of operational data needed in airlines and the value that can be attributed to knowledge extracted from these data, airlines have already realized the importance of technologies and methodologies associated with the concept of big data. In this article, we present the case study of SATA Airlines. The operational and the decision support systems are described as well as the perspectives of using these new technologies to support knowledge creation and aid the solution of problems in this specific company. The proposed system provides a new operational environment.

  6. The symmetry as interdisciplinary factor through its application and history

    Melo, Helena Sousa
    2st Annual International Interdisciplinary Conference AIIC 2014, 8-12 July, Azores Islands, Portugal. Texto publicado na sequência do encontro realizado na Universidade dos Açores.

  7. Mathematical contents through tales

    Martins, Maria do Carmo; Melo, Helena Sousa; Santos, Ana Isabel; Vinagre, Sandra
    This work is about the contest “A tale that accounts” which is promoted by an organizing committee with the collaboration of Regional Delegation of South and Islands of the Portuguese Mathematical Society. This contest is open to all students of public and private schools of all country and consists of writing and illustrating a tale involving mathematical contents. The contest, which is now in its third edition, began in the school year of 2012/2013. The experience allows us to point out that it promotes the interdisciplinary between different contents and revealed to be a captivating initiative that has been well...

  8. Behaviors and attitudes in the teaching and learning of geometry

    Melo, Helena Sousa; Martins, Maria do Carmo
    This paper presents a case study about teaching and learning topics of Geometry that are part of the syllabus of high school courses. Internationally the teaching of Geometry has been the subject of several studies. Nevertheless, research continues to reveal that Geometry is still quite absent from the classrooms, especially in the early years; Geometry is disliked by most students, is misunderstood, and its notation is totally ignored. One of the reasons for this failure is that these issues are addressed superficially in the curriculum of the training teachers of Geometry. This paper describes the experience of teaching Geometry to...

  9. Turmas heterogéneas no ensino superior : um desafio para o professor e para o aluno

    Martins, Maria do Carmo
    This paper presents a case study about teaching Forma e Espaço to a class of students with heterogeneous mathematical background. The course is part of the second semester of the degree in Educação Básica from the University of Azores. The study of teaching heterogeneous classes has been investigated in the past in different education levels: from high school to university. Here we focus on higher education. This problem reached some university courses in the recent past and revealed to be a real challenge both for the teacher and for the students, ending, most of the time, in a disappointing high...

  10. Gestion de la qualité dans la recherche en sciences sociales et humaines : articulation entre les méthodes qualitatives et quantitatives

    Silva, Osvaldo; Sousa, Áurea
    Dans un processus de recherche, il faut tenir compte de la planification de cette même recherche, la sélection des méthodes, les plans de recherche et la gestion de la qualité. Dans ce travail, nous abordons les principales phases d’une recherche, nous mentionnerons aussi la terminologie utilisée dans ce domaine. Les principales méthodes de recherche seront abordées, notamment les traits plus marquants des approches qualitative et quantitative. Nous nous pencherons particulièrement sur l’aspect complémentaire qu’ont ces deux approches et leur articulation, pour assurer la qualité dans la recherche.

  11. Gestion de la qualité dans la recherche en sciences sociales et humaines : articulation entre les méthodes qualitatives et quantitatives

    Silva, Osvaldo; Sousa, Áurea
    Dans un processus de recherche, il faut tenir compte de la planification de cette même recherche, la sélection des méthodes, les plans de recherche et la gestion de la qualité. Dans ce travail, nous abordons les principales phases d’une recherche, nous mentionnerons aussi la terminologie utilisée dans ce domaine. Les principales méthodes de recherche seront abordées, notamment les traits plus marquants des approches qualitative et quantitative. Nous nous pencherons particulièrement sur l’aspect complémentaire qu’ont ces deux approches et leur articulation, pour assurer la qualité dans la recherche.

  12. Quality evaluation of a selected partition : An approach based on resampling methods

    Silva, Osvaldo; Bacelar-Nicolau, Helena; Nicolau, Fernando C.; Sousa, Áurea
    The aim of this work on cluster analysis is to provide a methodology to analyse and assess the quality of a selected partition (the best partition according to several validation indexes). In the proposed approach, the evaluation of the stability and of the consistency of the results of the selected partition (original partition) was done using the comparison between this partition and each of the partitions (with the same number of clusters that the original one) obtained by resampling. A special emphasis is given to an index defined by linear combination of four indicators, which allows evaluating the adjustment between...

  13. Dealing with Hazing : are there different profiles of higher education students?

    Silva, Osvaldo; Caldeira, Suzana Nunes; Mendes, Maria; Botelho, Susana P.; Martins, Maria J.
    This study aims to understand the kind of relationship that students from two Portuguese higher education institutions – the Portalegre School of Health Sciences (ESSP) and the University of the Azores (UAC) – have with hazing and whether there are profiles of students associated with different types of relationship with hazing. Data were collected through the scale ‘Evaluation of Bullying Situations in Higher Education Hazing’. The findings obtained using appropriate statistical techniques, exhibit significant differences between the ESSP and the UAC, with students from the ESSP displaying a better relationship with hazing. They also showcase appreciable differences in the relationship...

  14. Dealing with Hazing : are there different profiles of higher education students?

    Silva, Osvaldo; Caldeira, Suzana Nunes; Mendes, Maria; Botelho, Susana P.; Martins, Maria J.
    This study aims to understand the kind of relationship that students from two Portuguese higher education institutions – the Portalegre School of Health Sciences (ESSP) and the University of the Azores (UAC) – have with hazing and whether there are profiles of students associated with different types of relationship with hazing. Data were collected through the scale ‘Evaluation of Bullying Situations in Higher Education Hazing’. The findings obtained using appropriate statistical techniques, exhibit significant differences between the ESSP and the UAC, with students from the ESSP displaying a better relationship with hazing. They also showcase appreciable differences in the relationship...

  15. Clustering an interval data set : are the main partitions similar to a priori partition?

    Sousa, Áurea; Bacelar-Nicolau, Helena; Nicolau, Fernando C.; Silva, Osvaldo
    This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

  16. Clustering an interval data set : are the main partitions similar to a priori partition?

    Sousa, Áurea; Bacelar-Nicolau, Helena; Nicolau, Fernando C.; Silva, Osvaldo
    This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

  17. Mapping stability : real rational maps of degree zero

    Cabral, João; Martins, Maria do Carmo
    In memory of our beloved Professor José Rodrigues Santos de Sousa Ramos (1948-2007), who João Cabral, one of the authors of this paper, had the honor of being his student between 2000 and 2006, we wrote this paper following the research by experimentation, using the new technologies to capture a new insight about a problem, as him so much love to do it. His passion was to create new relations between different fields of mathematics. He was a builder of bridges of knowledge, encouraging the birth of new ways to understand this science. One of the areas that Sousa Ramos...

  18. Clustering of variables with a three-way approach for health sciences

    Bacelar-Nicolau, Helena; Nicolau, Fernando C.; Sousa, Áurea; Bacelar-Nicolau, Leonor
    TPM Vol. 21, No. 4, December 2014, 435-447 – Special Issue © 2014 Cises.

  19. Cluster analysis using affinity aoefficient in order to identify religious beliefs profiles

    Sousa, Áurea; Nicolau, Fernando C.; Bacelar-Nicolau, Helena; Silva, Osvaldo
    International Scientific Forum, ISF 2013, ISF 2013, 12-14 December 2013, Tirana.

  20. On clustering interval data with different scales of measures : experimental results

    Sousa, Áurea; Bacelar-Nicolau, Helena; Nicolau, Fernando C.; Silva, Osvaldo
    This article is is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Attribution-NonCommercial (CC BY-NC) license lets others remix, tweak, and build upon work non-commercially, and although the new works must also acknowledge & be non-commercial.

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