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- 3D Map and DGPS Validation for a Vineyard Autonomous Navigation SystemPublication . Contente, Olga; Aranha, José; Martinho, José; Morgado, José Francisco; Reis, Manuel; Fereira, Paulo; Morais, Raul; Lau, NunoAn autonomous DGPS navigation system must use an accurate threedimensional (3D) digital map. However, it is crucial to validate it using data collected in the field. One possible way to validate the map is to employ a vehicle driven by an expert to ensure that the trajectory is plotted within the boundaries of navigation paths. It is essential to take this care, especially when the terrain is very highly uneven and small differences in position may correspond to large vertical deviations. A small navigation error can result in a serious fall, which may damage or even destroy the vehicle. In the Douro Demarcated Region, in northern Portugal, the vineyard is planted on narrow terraces built on steep hills along the winding Douro River. This paper presents the results of a dynamic trajectory survey obtained from a real navigation procedure, carried out by an expert driving an instrumented tractor during the spraying of the vineyard. The results were obtained using a DGPS (accuracy = 2 cm) and compared to an existing Digital Elevation Model (DEM) of the vineyard already created by the authors’ work group, with an average accuracy of 10 cm. The results are shown in a C# developed interface with OpenGL facilities, which enable the viewing of the 3D vineyard details. The results confirm the validation of the methodology previously adopted for map extraction and respective equipment selection. The trajectory of the tractor, including some maneuvers, is drawn within the inner and outer edges of each terrace or path that exists in the vineyard. The interface can also be used as an important tool in path planning to automatically extract the topology of the vineyard and to select the best path to carry out some vineyard tasks.
- Accurate Spectral Estimation of Non-periodic Signals Based on Compressive SensingPublication . Duarte, Isabel M. P.; Vieira, José M. N.; Ferreira, Paulo J S G; Albuquerque, DanielIn this work we propose a method based on compressive sensing (CS) for estimating the spectrum of a signal written as a linear combination of a small number of sinusoids. In practice one deals with signals with finite-length and so the Fourier coefficients are not exactly sparse. Due to the leakage effect in the case where the frequency is not a multiple of the fundamental frequency of the DFT, the success of the traditional CS algorithms is limited. To overcome this problem our algorithm transform the DFT basis into a frame with a larger number of vectors, by inserting a small number of columns between some of the initial ones. The algorithm takes advantage of the compactness of the interpolation function that results from the ‘1 norm minimization of the Basis Pursuit (BP) and is based on the compressive sensing theory that allows us to acquire and represent sparse and compressible signals, using a much lower sampling rate than the Nyquist rate. Our method allow us to estimate the sinusoids amplitude, phase and frequency.
- Acesso à informação: perceções e práticas no Ensino Superior na era da globalizaçãoPublication . Silva, Ana Isabel; Melão, Dulce; Balula, João PauloUm dos múltiplos desafios alimentados pela sociedade globalizada tem sido a permanente (re)conceptualização do conceito de literacia, ditada por uma (r)evolução digital que tem transformado a interação dos cidadãos com a informação. Tal mudança tem-se repercutido na arena educativa, convocando uma reflexão ampla sobre o modo adequado de resposta a tal desafio. Os estudantes do Ensino Superior, pela especificidade do seu trabalho académico, têm necessidade não só de selecionar como também de se posicionarem criticamente face ao crescente caudal de informação com que são confrontados. Assim, esta comunicação tem como objetivos: 1) procurar compreender de que modo os estudantes de Comunicação Social e de Publicidade e Relações Públicas percecionam as distintas práticas em literacia digital nas quais se envolvem quotidianamente; 2) distinguir quais os usos mais frequentes que fazem das Tecnologias da Informação e da Comunicação (TIC), no âmbito da prossecução do seu trabalho autónomo, para aceder à informação de que necessitam e de que modo as percecionam como relevantes; 3) identificar que tipo de pesquisa efetuam para realizar trabalhos académicos e de que forma esta evidencia as suas práticas de acesso à informação. Considerou-se adequada para este estudo exploratório uma abordagem de natureza quantitativa, desenvolvida com base em dados recolhidos através de inquérito por questionário, aplicado a estudantes de dois cursos de uma instituição portuguesa do Ensino Superior Politécnico (Comunicação Social e Publicidade e Relações Públicas). Os resultados evidenciam que apesar de acederem com frequência à Internet e se percecionarem utilizadores proficientes das Tecnologias da Informação e da Comunicação (TIC), tal não significa que estejam a assumir o posicionamento crítico face à informação, exigido neste nível de ensino. Conclui-se da necessidade de se realizarem estudos de maior amplitude que possam contribuir para uma melhor compreensão das razões que subjazem a tais práticas, bem como formas apropriadas de intervenção.
- Active foreign language learning practices in higher education: the perspectives of the actorsPublication . Delplancq, Véronique; Costa Lopes, Ana Maria; Pereira, José; Fidalgo, SusanaThe digital age and Generation Z are key features within the current panorama of teaching-learning practices in higher education and drive innovative student-centred strategies, oriented towards the reality of the labour market. The article describes an experience of pedagogical activation carried out through project-based learning using digital tools, with undergraduate Media Studies students of the School of Education in Viseu (Portugal), towards the acquisition of skills in French and English, during the academic year 2021-2022. The objective was to renew teaching practices, so as to foster greater student motivation on the part of forthcoming media professionals, by enhancing their competences and confidence with concern to spoken and written interaction within the context of foreign languages for specific purposes. The dynamics of learning combined with authentic contexts and digital tools, encourages teachers to rethink their methodology and objectives, in order to be more innovative. One accounts for the chosen strategy and the various steps followed, evaluates the path of both students and teachers, analyses the benefits, the drawbacks and the impact in terms of acquired skills and concludes with reflections for forthcoming work projects.
- Adding Space and Senses to Mobile World ExplorationPublication . Silva, Maria João; Gomes, Cristina Azevedo; Pestana, Bruno; Lopes, João Correia; Marcelino, Maria José; Gouveia, Cristina; Fonseca, AlexandraMobile technologies can facilitate collaboration and knowledge creation in diverse educational contexts, enabling children to become actors in participation processes all around the world. Based on the lessons learned in various research projects, this chapter argues that adding spatial and sensory information augments the affordances of mobile world exploration by primary school children. This chapter starts by introducing a framework that relates technology, education, society and environment and by analysing the significance of space and senses in children’s literacy and mobile learning applications. It goes on to examine the advances in ICT for the development of multisensory georeferenced exploration and communication activities in the context of collaborative learning. The experience of the SchoolSenses@Internet project that developed, tested and used a mobile application for creating georeferenced multisensory messages within diverse collaborative learning contexts is presented. The design and the implementation process of the application are outlined and the lessons learned are identified and summarized. Finally some conclusions are drawn and issues for further research indicated.
- Administração e qualidade ou qualidade na administraçãoPublication . Carvalho, Ana Branca; Marques dos Santos, PaulaPretende-se com este trabalho abordar a problemática da administração de empresas e a organizacional em termos de qualidade e produtividade, essencial para a competitividade organizacional e empresarial. Tal abordagem é relevante por ser plenamente reconhecido que as administrações organizacionais e de qualidade buscam excelência e sobrevivência organizacional. Administrar mas administrar bem significa ter qualidade na administração. Abordamos, no ponto 1 os primórdios da administração até aos mais modernos conceitos de administração. O ponto 2 faz uma breve alusão aos conceitos básicos de Administração Privada e Pública para uma melhor compreensão. No ponto 3 abordamos a qualidade nas organizações, funções da administração, liderança, motivação, empreendedorismo e gestão do conhecimento.
- Advertising Ethics: the bounds of deceptiveness and the endless virtues of rhetorical strategiesPublication . Barroso, PauloIs there any correspondence between advertising and ethics? Advertising is a persuasive speech technique to persuade and to sell something (an idea, concept, product, service or brand); it uses effective means and strategies of communication and it is primarily engaged to achieve this objective without worrying too much with the way to do it. Therefore, ethical concerns may be seen as an obstruction to this achievement. But there are fallacious, immoral, and unethical or anti-ethical advertisements. As a public speech, advertising messages requires ethical caution, because the ends (the persuasive and commercial achievement) do not justify the means. Advertising should take an ethical dimension, especially when it follows a cunning, fallacious or deceptive strategy. Facing the increasing profusion of epidictic and apodictic messages in contemporary Western societies and industrialized cultures, this chapter focuses on a critical analysis of ethics in such public discourses aiming our consumption, satisfaction, pleasure, comfort, happiness, or social success. Following a reflexive methodology, based on a theoretical research, the main objective of this chapter is to answer the previous question and to understand how rhetorical strategies and techniques are more and more improved and able to develop new visual and popular forms of life, demonstrating the so-called secularization is all about the increase and excess of everything (products, goods, services, brands brought by advertising messages, also in excess) and the fading of ethical concerns and moral principles.
- Afrofuturismo e cultura de resistência em histórias em quadrinhos brasileirasPublication . F. Miranda Jr, Edmilson; Danielle Ferreira Medeiro da Silva de Araújo; Eva Dayane Almeida de Góes; Walkyria Chagas da Silva Santos; Maria do Carmo Rebouças dos Santos; Richard SantosA imagem do povo negro em narrativas de Histórias em Quadrinhos afrofuturistas é o foco da pesquisa que aqui se apresenta. Nesse recorte, percebo que o pensamento hegemônico82 – marcado pelo colonialismo – vê o negro de um jeito e o Afrofuturismo propõe ver de outro, mais positivo, não mais um subalterno. Esse negro, na proposta afrofuturista, é protagonista e traz consigo elementos de diferentes culturas cuja origem remete às tradições africanas, reposicionando também aspectos religiosos e estéticos, reapresentados em uma imagem diferente do que até então fora comum em narrativas dos mais diferentes gêneros na cultura de massa.
- Agricultural Policies in India: Demands of Current RealitiesPublication . Martinho, VítorAny assessment of the agricultural sector and the respective policies worldwide increase its robustness if considering the Indian framework. In fact, India is a populous country in South Asia with great changes to meet the demand for food of its population. Some solutions have been discussed; however, the questions here are the relationships between the need for higher food production and the environmental impacts. The climate-smart agriculture (CSA) approaches may have some solutions; nonetheless, the threats brought by global warming are real and challenging. Taking into account India's food requirements, the contributions of agricultural policy are analysed to support the identification of solutions through a systematic review based on items with higher total link strength. As main conclusions, of referring the attention of the Indian agricultural policies with the new approaches of the CSA, water management, public health, agrobiodiversity, agricultural and policy transitions, trade liberalisation and the Asian green revolution.
- Aldeias Históricas de Portugal Destino Sustentável e InovadorPublication . Pinto, Rita; Pato, Maria Lúcia; Duque, Ana SofiaAs Aldeias Históricas de Portugal (AHP) procuram consolidar o seu desenvolvimento turístico nos princípios da sustentabilidade e inovação. Tendo como base esta premissa, o objetivo principal deste estudo é o de analisar que trabalho tem vindo a ser feito nesta matéria. Para a concretização deste objetivo para além da revisão da literatura, foi realizada uma entrevista exploratória, posteriormente transcrita e sujeita à análise de conteúdo. Os resultados permitem afirmar que o desenvolvimento do turismo nas AHP assenta nos princípios de sustentabilidade, inovação e proteção do património. Graças a muito trabalho colaborativo e de resiliência, as AHP foram recentemente distinguidas com o certificado Biosphere Destination, sendo o primeiro destino no mundo em rede certificado, e o primeiro nacional a receber esta distinção.