Determination of elastic resonance frequencies and eigenmodes using the method of fundamental solutions

In this paper, we present the method of fundamental solutions applied to the determination of elastic resonance frequencies and associated eigenmodes. The method uses the fundamental solution tensor of the Navier equations of elastodynamics in an isotropic material. The applicability of the the method is justified in terms of density results. The accuracy of the method is illustrated through 2D numerical examples for the disk and non trivial shapes.info:eu-repo/semantics/publishedVersio

Learning Analytics and Recommender Systems toward Remote Experimentation

This paper presents a process based on learning analytics and recom- mender systems to provide suggestions to students about remote laboratories ac- tivities in order to scaffold their performance. For this purpose, the records of remote experiments from the VISIR project were analyzed taking into account one of its installations. Each record is composed of requests containing the as- sembled circuits and the configurations of the measuring equipment, as well as the response provided by the measurement server that evaluates whether a par- ticular request can be performed or not. With the log analysis, it was possible to obtain information in order to determine some initial statistics and provide clues about the student’s behavior during the experiments. Using the concept of rec- ommendation, a service is proposed through request analysis and returns to the students more precise information about possible mistakes in the assembly of circuits or configurations. The process as a whole proves consistent in what re- gards its ability to provide suggestions to the students as they conduct the exper- iments. Furthermore, with the log, relevant information can be offered to teach- ers, thus assisting them in developing strategies to positively impact student’s learning.info:eu-repo/semantics/publishedVersio

Promoting heritage through a pervasive and mobile computing approach: the case of the portuguese city of Mirandela

Promoting heritage is a challenge for all generations. The heritage is a legacy that we inherit from our ancestors and that we should deliver to our decedents. In this sense, the first steep that we should take, after preserve the heritage, is to develop solutions that enable effective and democratic ways to promote it. This promotion starts with the ability that of those who visit this heritage be able to know and enjoy it. Information and Communication Technologies and specifically Pervasive and Mobile Computing represents nowadays a big opportunity to develop innovative solutions capable to inform tourists about heritage and even enable them to experience past realities related to immaterial heritage like ancestral legends, past events and even no longer existing physical patrimony. This paper starts to make a reflection and the evolution the Information and Communication Technologies role on tourism and present a technological architecture to respond to the challenge of promote heritage and inform tourist in their travel experiences. After that, the paper presents also a developed prototype created to the Portuguese City of Mirandela capable to promote its historical and gastronomic heritage and also support the tours of the tourists through its territory. Finally, there are made some remarks about the future growing and directions for technology applied to tourism.UNIAG, R&D unit funded by the FCT - Portuguese Foundation for the Development of Science and Technology, Ministry of Science, Technology and Higher Education. UID/GES/4752/2016.info:eu-repo/semantics/publishedVersio

The Vectorial Potential of Lutzomyia (Nyssomyia) intermedia and Lutzomyia (N.) whitmani in the Transmission of Leishmania (V.) braziliensis Can Also Be Related to Proteins Attaching

Submitted by Sandra Infurna ([email protected]) on 2017-09-14T17:38:04Z No. of bitstreams: 1 carlos_alves_etal_IOC_2010.pdf: 1073727 bytes, checksum: 4742cbf7fc577a98aa2392af0ff44c04 (MD5)Approved for entry into archive by Sandra Infurna ([email protected]) on 2017-09-14T17:47:06Z (GMT) No. of bitstreams: 1 carlos_alves_etal_IOC_2010.pdf: 1073727 bytes, checksum: 4742cbf7fc577a98aa2392af0ff44c04 (MD5)Made available in DSpace on 2017-09-14T17:47:06Z (GMT). No. of bitstreams: 1 carlos_alves_etal_IOC_2010.pdf: 1073727 bytes, checksum: 4742cbf7fc577a98aa2392af0ff44c04 (MD5) Previous issue date: 2010Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Bioquímica e Fisiologia de Insetos. Rio de Janeiro, RJ, Brasil

XIV Conference on Technology, Teaching and Learning of Electronics

Livro de atas da TAEE2020.A conferencia TAEE conhecerá na sua 14ª edição um momento histórico. Não só é a primeira vez que a será organizada fora do território Espanhol, como terá lugar a verdadeiramente pioneira experiência de realizar esta conferência num formato puramente virtual no Instituto Superior de Engenharia do Porto. Esta opção representa a solução possível para um evidente problema mundial, que surgiu de forma repentina durante a preparação desta edição. Optamos por aplicar a típica abordagem de engenharia, instintivamente encarando este novo problema como uma verdadeira oportunidade, e aproveitando as limitações impostas para experimentar novas soluções para novas questões. Tentamos criar uma TAEE diferente, não melhor nem pior, mas indo buscar proveitos às tecnologias de comunicação emergentes de forma a criar e dinamizar um evento onde não estaremos fisicamente juntos, mas poderemos comunicar e conviver de forma virtual. A grande motivação da TAEE será sempre os visíveis entrosamentos, dedicação e motivação da comunidade e serão estes fatores que permitirão o sucesso nesta nova forma de estarmos e trabalharmos juntos, mas à distância.info:eu-repo/semantics/publishedVersio

Transistor teaching back to Transfer-Resistor : A summary table of definitions and students’ perceptions

The Bipolar Junction Transistor (BJT) study is a regular subject on analog electronic subjects taught in the initial phase of electronic engineering courses. This electronic component, often considered elementary, is far from being simple to explain because it covers several concepts, such as three Regions of Operation, two Working Regimes, and two Region of Operation Boundaries. It is not surprising then that students often find it difficult to understand the functioning of this component. The present article describes partially the work developed by a team with a number of students in order to understand the difficulties of teaching/learning the BJT. We present the students’ perceptions from the analysis of several traditional and modern means to support the learning of the BJT. Interestingly, the learning BJT model considered simpler for beginner students corresponds to the model that originally gave it the name i.e. Trans-Resistor (Transistor).info:eu-repo/semantics/publishedVersio

A pervasive and mobile computing approach to promote heritage of a city

Cultural heritage is an extremely valuable set of materiality, traditions and knowledge from the Past that should be used to better understand the Past itself. However, even nowadays, there are still some difficulties to manage, preserve and disseminate cultural heritage. In this sense, the first step that we should take after preserving the heritage is to develop solutions that enable effective and democratic ways to promote it. This promotion starts with the ability of those who visit this heritage to be able to know and enjoy it. Information and Communication Technologies and specifically Pervasive and Mobile Computing ones represent nowadays a big opportunity to develop innovative solutions capable to inform tourists about heritage and even enable them to experience past realities related to immaterial heritage like ancestral legends and past events even with no longer existing physical patrimony. This paper starts to make a reflection of the evolution, the Information and Communication Technologies role on tourism and present a technological architecture to respond to the challenge of promoting heritage and informing tourists in their travel experiences. After that, the paper presents also a developed prototype created to the Portuguese City of Mirandela which was capable to promote its historical and gastronomic heritage and also support the tours of the tourists through its territory. Finally, some remarks about the future growing and directions for technology applied to tourism are made.UNIAG, R&D unit funded by the FCT – Portuguese Foundation for the Development of Science and Technology, Ministry of Science, Technology and Higher Education. UID/GES/4752/2016.info:eu-repo/semantics/publishedVersio

Remote Experimentation supported by Learning Analytics and Recommender Systems

This paper proposes a process based on learning analytics and recommender systems targeted at making suggestions to students about their remote laboratories activities and providing insights to all stakeholders taking part in the learning process. To apply the process, a log with requests and responses of remote experiments from the VISIR project were analyzed. A request is the setup of the experiment including the assembled circuits and the configurations of the measuring equipment. In turn, a response is a message provided by the measurement server indicating measures or an error when it is not possible to execute the experiment. Along the two phases of analysis, the log was analyzed and summarized in order to provide insights about students' experiments. In addition, there is a recommendation service responsible for analyzing the requests thus returning, in case of error, precise information about the assembly of circuits or configurations. The evaluation of the process is consistent in what regards its ability to afford recommendations to the students as they carry out the experiments. Moreover, the summarized information intends to offer teachers means to better understand and develop strategies to scaffold students' learning.info:eu-repo/semantics/publishedVersio

An Alternative Way of Teaching Operational Amplifiers Using a Reconfigurable and Expandable Kit

Early on, students must develop competences by implementing simple or complex electronic circuits with Operational Amplifiers (OpAmps). Traditionally, these skills were mainly developed in laboratory classes, but technology allows us to explore other and complementary ways of aiding students in this achievement. This paper presents a contribution to improve the way OpAmps are included in electronic engineering courses’ curricula. A reconfigurable and expandable kit to teach electronic circuits based on the OpAmp uA741 was designed and implemented. This kit comprises a software application locally interfaced with a hardware platform capable of running in a PC. This platform includes a circuit with the OpAmp uA741 able to reconfigure according to a set of parameters defined by a software application. Its reconfiguration capability also enables the establishment of automatic connections for measuring and for applying signals to a reconfigured circuit, plus the ability to simulate the same or other OpAmp-based circuits. This paper provides an overview about the OpAmp uA741 and its relevance in engineering education. After presenting the kit and make some considerations for its improvement, at the end a brief discussion about its implementation in education according to specific educational strategies and methodologies are provided.This work was supported in part by the Fundação para a Ciência e Tecnologia under Grant FCT-UID-EQU-04730-2013info:eu-repo/semantics/publishedVersio

Teaching and learning Operational Amplifiers using a reconfigurable and expandable kit

Operational Amplifiers (OpAmps) are one of the most important integrated circuits in the area of electronics. These type of devices are widely adopted in the area since they allow the design of simple and/or complex analogue circuits without many efforts. It is therefore fundamental to create innovative educational solutions to facilitate their teaching and learning, and in particular the inclusion of more experimental work in a course curricula. For this purpose, it was designed and implemented a reconfigurable and expandable kit to teach and learn electronic circuits based on the OpAmp uA741. The kit comprises a software application and a hardware platform. The software application allows the simulation and the reconfiguration of real electronic circuits based on the OpAmp uA741 included in the hardware platform. For measuring and/or applying signals to a particular reconfigured circuit, users may establish automatic connections. In this paper it is described the features and functionalities provided by the kit, and an overview about the OpAmp uA741. At the end, some teachers’ opinions about their perceptions concerning a possible adoption of the kit in a real educational scenario are presented.N/