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2018
Rebelo, H. B., A. Gregório, P. A. R. Rosa, D. Lecompte, and C. Cismaşiu. "Experimental characterization of 3D-printed PLA under uniaxial high strain-rate loading." AuxDefense 2018 – 1st World Conference on Advanced Materials for Defense. Lisbon 2018. auxdefense_extabstract_v2.pdf
Baikova, {E. N. }, L. Romba, R. Melicio, and {S. S. } Valtchev. "Simulation and experiment on electric field emissions generated by wireless energy transfer." Technological Innovation for Resilient Systems - 9th IFIP WG 5.5/SOCOLNET Advanced Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2018, Proceedings. Eds. {L. M. } Camarinha-Matos, {K. O. } Adu-Kankam, and M. Julashokri. IFIP Advances in Information and Communication Technology. Springer New York LLC, 2018. 243-251. Abstract

This paper presents a wireless energy transfer (WET) system operating at the frequency of tens of kHz. It treats the modeling and simulation of WET prototype and its comparison with experimental measuring results. The wireless energy transfer system model was created to simulate the electric field between the emitting and the receiving coils, applying the finite element method. The results from the simulation are compared to the measured values of the electric field emission from the wireless energy transfer equipment. In the recent years the interest in the WET technology, especially for the electric vehicles (EV) batteries charging, is rapidly growing. The WET systems pollute the environment by electromagnetic emissions. Due to the expanding use of this technology in industrial and consumer electronics products, the problems associated with the electromagnetic compatibility (EMC), and the adverse impact on the human health becomes highly important.

Romba, L., {E. N. } Baikova, C. Borges, R. Melicio, and {S. S. } Valtchev. "Wireless battery charger for EV with circular or planar coils: comparison." Technological Innovation for Resilient Systems - 9th IFIP WG 5.5/SOCOLNET Advanced Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2018, Proceedings. Eds. {L. M. } Camarinha-Matos, {K. O. } Adu-Kankam, and M. Julashokri. IFIP Advances in Information and Communication Technology. Springer New York LLC, 2018. 214-223. Abstract

This paper presents the experimental results obtained in the wireless energy transfer (WET) system prototype based on coils: circular or planar. With these experimental results we can choose the tuning settings to improve the efficiency of power transmission of the WET systems. In WET for electric vehicle batteries charging, the coil shape and the range between the coils are the most important issues of those systems.

Pilco, H., Sanchez-Gordon, S., Calle-Jimenez, T., Rybarczyk, Y., Jadán, J., Villarreal, S., Esparza, D., Acosta-Vargas, P., Guevara, C., Nunes, and I. "Analysis and improvement of the usability of a tele-rehabilitation platform for hip surgery patients." 9th International Conference on Applied Human Factors and Ergonomics. Orlando, USA 2018.
Calle-Jimenez, T., Sanchez-Gordon, S., Rybarczyk, Y., Jadán, J., Villarreal, S., Esparza, D., Acosta-Vargas, P., Guevara, C., and Nunes I. "Analysis and improvement of the Web accessibility of a tele-rehabilitation platform for hip arthroplasty patients." 9th International Conference on Applied Human Factors and Ergonomics. Orlando, USA 2018.
Gouveia, Nuno D., Duarte M. V. Faria, and António Pinho Ramos. "Assessment of SFRC flat slab punching behaviour – Part I: monotonic vertical loading." Magazine of Concrete Research (2018): 1-46. AbstractWebsite

This paper presents a study of the behaviour and load capacity of Steel Fibre Reinforced Concrete (SFRC) flat slabs under monotonically increased concentrated vertical loads. The SFRC was used only in the local region of the slab-column connection, as the rest of the slab was cast using normal concrete (NC) without fibres. The six experimental test specimens had a thickness of 150 mm with different longitudinal reinforcement ratios, using a non-uniform distribution over the slab width. The concretes used were made with different Dramix® 4D 65/60 BG steel fibre contents (0%, 0.5 %, 0.75% and 1.0% volume content). The slab tests were complemented by flexural tests on notched-beams. This made it possible to determine the tension behaviour of the different concretes used, through a linear post-cracking behavior and inverse analysis. The inverse analysis made it possible to define the stress-crack opening relationship that characterize the tension behaviour of SFRC and to relate it to the observed behaviour and load capacity of the tested slabs. The tests results show that the tensile behaviour of the SFRC plays an important role in the behavioural and load capacity of the slabs and that it can be considered relevant to physically based models.

Gouveia, Nuno D., Duarte M. V. Faria, and António Pinho Ramos. "Assessment of SFRC flat slab punching behaviour – part II: reversed horizontal cyclic loading." Magazine of Concrete Research (2018): 1-17. AbstractWebsite

This paper presents an experimental study of four flat slab specimens subjected to combined vertical and horizontal cyclic loading. Steel fibre-reinforced concrete (SFRC) was used only in the local region of the slab–column connection, while the rest of the slabs were cast using normal concrete. The specimens measured 4·15 m × 1·85 m × 0·15 m and were connected to two steel half columns by 0·25 m × 0·25 m rigid steel plates, prestressed against the slab using steel bolts, to ensure monolithic behaviour. The specimens were tested using an innovative test setup system that accounted for important factors, such as the ability of bending moment redistribution, line of inflection mobility and assured equal vertical displacements at the opposite slab borders, and symmetrical shear forces. Results show that the presence of SFRC in the slab–column connection region is effective in increasing the deformation capacity of slab–column connections, allowing the increase of horizontal drift ratios.

Roque, C., and H. Rocha Avaliação formativa com recurso à tecnologia [Formative assessment using technology]. SIEM. Almada, Portugal: APM, 2018. Abstract

The present study aims to understand the potentialities and implications,
to the teacher and her practice, of the use of formative assessment with the support
of educational technology.
Regarding the research methodology, this study is part of the research on own
practice. The participants were the teacher, who was simultaneously a researcher,
and the students of a 9th grade class.
In the course of this experience it was found that the use of formative assessment
allows, on the one hand, the student to realize what he manages to understand, and
what he has to do to overcome what are less consolidated parts of the content in
study; and, on the other, the teacher to detect in a timely manner the difficulties of
the student and to change strategies to allow the student to overcome his difficulties.
The lack of time, the difficulties in managing the curriculum and the existence of
national exams are three of the main obstacles mentioned by the teachers for the
non-realization of formative assessment. In this experience it was found that the use
of new technologies turns possible to overcome these limitations.
This type of assessment had a very positive impact on teacher’s practice and in the
learning of the students.
Keywords: assessment; formative assessment; new technologies.

Carvalho, F., A. Lopes, A. T. Curulli, TP Silva, M. M. A. Lima, G. Montesperelli, S. Ronca, G. Padeletti, and JP Veiga. "The Case Study of the Medieval Town Walls of Gubbio in Italy: First Results on the Characterization of Mortars and Binders." Heritage. 1.2 (2018): 468-478.
Raposo, P., J. Martins, J. Correia, Maria E. Salavessa, Cristina Reis, José Xavier, and Abilio M. P. de Jesus. "Characterization of the mechanical behaviour of wooden construction materials from quinta lobeira de cima." International Journal of Structural Integrity. 9 (2018): 396-410. AbstractWebsite

Purpose The antique structures are part of the inheritance that our elders left, being important to preserve their memories. It is important to preserve, rehabilitate and restore the historic buildings protecting the cultural patrimony, attending to the actual comfort and habitability requirements. It is necessary to study the behaviour of the various elements that compose antique structures (masonry and wood) in order to develop assessment measures according to the characteristics of the original materials. The paper aims to discuss these issues. Design/methodology/approach An experimental campaign to characterize the mechanical behaviour of the wood of the roof of the �sequeiro� of �Quinta Lobeira de Cima�, a building from the twentieth century located in Minho, was carried out. The tested wood specimens are from two different species: chestnut and oak. Compression, tension and static flexion tests according to parallel to the grain direction were performed. Other parameters, such as density, moisture content and longitudinal modulus of elasticity in compression and in tension, were also obtained. The measurement of displacements was made with Digital Image Correlation (DIC). Findings The results of this study show the similarity between experimental and empirical values for the studied woods species. Originality/value This original study aimed at characterizing the mechanical properties using DIC of wood of the roof of the �sequeiro� of �Quinta Lobeira de Cima�, a building from the twentieth century located in Minho (Portugal). This study is part of master thesis of Jo�o Martins, an original research work.

Jassbi, Javad J., Rita A. Ribeiro, Luis M. Camarinha-Matos, José Barata, and Maria Isabel Gomes Continuous Reinforcement Operator applied to Resilience in Disaster Rescue Networks. 2018 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)., 2018.
Rocha, H. Demonstração matemática versus demonstração no ensino da Matemática – a perspetiva de professores [Mathematical proof versus proof on mathematics teaching – the teachers’ point of view]. SIEM. Almada, Portugal: APM, 2018. Abstract

This study intends to analyze the perspectives of teachers of different levels regarding proof and its functions in Mathematics and Mathematics teaching. Adopting a methodology of a qualitative nature, and based on interviews, the perspectives of teachers of upper secondary, higher education and training teachers of Mathematics were collected. The conclusions reached suggest that teachers seem to share a formal conception of mathematical proof, recognizing the need to introduce some simplification when considering proof in Mathematics teaching as well as the importance of their functions of validation, contribution to learning and even a cultural function.

Rotatori, FM, M. Moreno-Azanza, and O. Mateus Dryosaurid ornithopods from the Late Jurassic of Portugal: an overview. XVI Annual Meeting of the European Association of Vertebrate Palaeontologists, .Abstract Book. Caparica, Portugal June 26th-July 1st, 2018: Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2018. Abstractrotatori_et_al_2018_eavp_abstract.pdf

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Acosta-Vargas, P., Esparza, D., Rybarczyk, Y., González, M., Villarreal, S., Jadán, J., Guevara, C., Sanchez-Gordon, S., Calle-Jimenez, T., Baldeón, J., and Nunes I. "Educational resources accessible on the tele-rehabilitation platform." 9th International Conference on Applied Human Factors and Ergonomics. Orlando, USA 2018.
Rybarczyk, Y. "Educative game to promote phonological awareness in children with neurodevelopmental disorders." IEEE Latin America Transactions. 16.1 (2018): 242-247.copy.pdf
Martinho, H., and H. Rocha. "A escrita matemática e a intuição em Geometria [Mathematical writting and intuition in geometry]." Educação e Matemática. 149-150 (2018): 34-38.Website
Rybarczyk, Y., and Kleine Deters J. "Evaluation of self-rehabilitation movements by Hidden Markov Model." IEEE International Conference on INnovations in Intelligent SysTems and Applications. Thessaloniki, Greece 2018.
Gouveia, Nuno D., Massimo Lapi, Maurizio Orlando, Duarte M. V. Faria, and António M. P. Ramos. "Experimental and theoretical evaluation of punching strength of steel fiber reinforced concrete slabs." Structural Concrete. 19.1 (2018): 217-229. AbstractWebsite

This paper deals with the experimental and theoretical evaluation of punching shear capacity of steel fiber reinforced concrete (SFRC) slab–column connections. Five experimental specimens with a thickness of 160 mm, different fiber volume contents (0, 1.0, and 1.5%) and different flexural reinforcement ratios (0.75 and 1.5%) have been tested. The experimental results were evaluated using a physical–mechanical model based on the critical shear crack theory (CSCT). The model has given a good approximation of experimental punching shear strengths. In general, tests have highlighted a significant increase in load and deformation capacity of fiber reinforced concrete slab–column connections in comparison with reinforced concrete connections.

Ribeiro, Cátia, Pedro M. Callapez, and Octávio Mateus Fossil vertebrates in the paleontological collections of the Science Museum (University of Coimbra, Portugal). XVI Annual Meeting of the European Association of Vertebrate Palaeontologists, .Abstract Book. Caparica, Portugal June 26th-July 1st, 2018: Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2018. Abstractribeiro_et_al_2018_eavp_abstract.pdf

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Rybarczyk, Y., Villarreal, S., González, M., Acosta-Vargas, P., Esparza, D., Sanchez-Gordon, S., Calle-Jimenez, T., Jádan, J., and Nunes I. "Interaction with a tele-rehabilitation platform through a natural user interface: a case study of hip arthroplasty patients." 9th International Conference on Applied Human Factors and Ergonomics. Orlando, USA 2018.
Rotatori, Filippo Maria, Miguel Moreno-Azanza, and Octávio Mateus. "Isolated dryosaurid (Dinosauria: Ornithopoda) cranial remains from the Late Jurassic of Portugal." EJIP Life finds a way. Gasteiz, Spain 2018. 95-98.rotatori_et_al_2018_ejip.pdf
Cismasiu, C., J. R. G. Ferreira, and H. B. Rebelo. "Modelação tridimensional de ondas de choque em LS-DYNA." Construção Magazine.86 (2018): 24-28.
Rocha, H., and F. Viseu O ensino de Funções no 3.º ciclo e no ensino secundário: que diferenças? [Teaching Functions at lower and upper secondary: what is different?]. EIEM. Coimbra: SPIEM, 2018. Abstract

Neste estudo analisamos as perceções que professores do 3.º ciclo e do ensino secundário têm da sua prática no âmbito do ensino de Funções, com o objetivo de as caracterizar e de identificar as diferenças existentes entre estes dois grupos de professores. Um aspeto particularmente relevante se tivermos em conta que se tratam de dois grupos de professores com formações iniciais idênticas. Adotamos uma metodologia mista, com uma vertente quantitativa apoiada na aplicação de questionários e uma vertente qualitativa baseada na realização de entrevistas. As principais conclusões alcançadas apontam para semelhanças nas perceções dos professores, mas também para algumas diferenças em função do ciclo de ensino. Na planificação das aulas os manuais são amplamente utilizados, mas de forma diferente consoante o ciclo de ensino do professor. Os professores de ambos os ciclos de ensino estabelecem conexões entre diferentes representações, mas valorizam de diferentes formas as representações disponíveis. O envolvimento dos alunos nas atividades da aula é outro aspeto destacado pelos professores, mas uma vez mais existem diferenças. Na avaliação o recurso ao teste é enfatizado pelos dois grupos de professores, mas já existem diferenças quanto à importância atribuída ao trabalho de grupo.

Rocha, H., and P. Teixeira O professor e a aula de Matemática [The teacher and the Mathematics class]. EIEM. Coimbra: SPIEM, 2018. Abstract

A formação e o desenvolvimento profissional do professor são determinantes para as opções que este assume na sala de aula. É o seu conhecimento, aquilo que valoriza e o contexto onde se encontra inserido que determinam as experiências de aprendizagem que proporciona aos seus alunos. Mas esse conhecimento profissional envolve uma multiplicidade de dimensões que decorrem da sua formação inicial e contínua, mas também das experiências que teve ocasião de vivenciar e de processos de socialização, onde a interação com os pares e as oportunidades de desenvolver trabalho colaborativo são elementos importantes. A aula de matemática surge assim como o campo aglutinador do trabalho do professor numa dupla vertente que se une num ciclo único: por um lado a aula de Matemática é o foco do trabalho do professor, onde as opções previamente assumidas são implementadas; e, por outro lado, é um ponto de partida para a reflexão e o desenvolvimento profissional do professor.

Da planificação da aula, onde a escolha das tarefas e a forma de as implementar são aspetos centrais e onde a vertente histórica não deixará de estar presente; à sua implementação, operacionalizando diferentes recursos (nomeadamente os tecnológicos) e assumindo dinâmicas de aula diferenciadas; até à fase de reflexão entre pares, que termina e reinicia um novo ciclo – estas são as grandes etapas em torno das quais este texto se organiza e onde a formação inicial e contínua não deixarão de estar presentes.

Rybarczyk, Y., Cointe, C., Gonçalves, T., Minhoto, V., Kleine Deters, J., Villarreal, S., Aladro Gonzalo, A., Baldeón, J., and Esparza D. "On the use of natural user interfaces in physical rehabilitation: a Web-based application for patients with hip prosthesis." Journal of Science and Technology of the Arts. 10.2 (2018): 15-24.copy.pdf