Additive Manufacturing has been extensively used in the last years for prototyping and small series production of functional parts. One of the most popular processes is material extrusion, where a material is extruded through a nozzle, being the part created layer by layer. In this work, an advanced 3D printer is presented, build by the authors, based in a Delta Robot configuration, able to produce parts with 4...
Made available in DSpace on 2022-04-28T19:28:17Z (GMT). No. of bitstreams: 0 Previous issue date: 1991-01-01; Instituto de Física Unicamp; Dipartimento di Fisica dell'Université CNR56126; Departamento de Ciências da FEIS-UNESP; Departamento de Ciências da FEIS-UNESP
Made available in DSpace on 2022-04-28T18:55:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-01-01; The objectives of this study were to assess the effects of induced testicular degeneration in Bos taurus indicus (Nellore) bulls on changes in seminal characteristics and fertilizing ability of sperm. Four Nellore bulls (30-36-month-old, 500-550 kg) with good seminal quality (>80% motile and morphologic...
Made available in DSpace on 2022-04-28T19:03:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-11-10; Unsupervised land-cover classification aims at learning intrinsic properties of spectral and spatial features for the task of area coverage in urban and rural areas. In this paper, we propose to model the problem of optimizing the well-known k-means algorithm by combining different variations of the Har...
Made available in DSpace on 2022-04-28T19:03:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-11-10; Sequential learning-based pattern classification aims at providing more accurate labeled maps by adding an extra step of classification using an augmented feature vector. In this paper, we evaluated the robustness of Optimum-Path Forest (OPF) classifier in the context of land-cover classification using ...
Made available in DSpace on 2022-04-28T20:40:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-07-01; Extensive systematizations of theoretical and experimental nuclear densities and of optical potential strengths extracted from heavy-ion elastic scattering data analyses at low and intermediate energies are presented. The energy dependence of the nuclear potential is accounted for within a model based o...
Made available in DSpace on 2022-04-29T08:28:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-01-01; In this work we report 12 new optically pumped far-infrared (FIR) laser lines from CH3OH and 19 from 13CH3OH. A 13CO2 laser of wide tunability (110 MHz) was used as pump source, and a Fabry-Perot open cavity was used as a FIR laser resonator. © 2007 Optical Society of America.; Instituto de Física Gleb ...
Em Portugal uma em cada duas pessoas apresenta níveis de literacia em saúde insuficientes. Tendo consciência desta situação a Direção Geral de Saúde lançou, em 2019, um Plano de ação, tendente a minimizar este problema, ao que se seguiu o lançamento de um Manual de Boas Práticas destinado à capacitação dos profissionais de saúde. A Escola Superior de Saúde do Instituto Politécnico do Porto forma um leque divers...
This study aimed to determine the extent and quality of environmental sustainability disclosure in the aviation industry through indexes influenced by the following variables: "Disclosure is made through sustainability reports and similar", "Airlines are based in an industrialized country", "Airlines are part of Strategic Alliances", "Airlines are registered in the United Nations Global Compact " and "Airlines ...
The engagement of the fishers and other stakeholders in the management of the resources is considered the key ingredient for a good fishery governance. The stalked barnacle Pollicipes pollicipes can be considered the most important economic resource on rocky shores of northern Spain and continental Portugal. This species is highly prized as food and it is heavily exploited. The main objective of the present stu...