Universitat Politècnica de Catalunya

The present disclosure relates to a thermoelectric device comprising: a type n semiconductor and a type p semiconductor, the type n semiconductor and the type p semiconductor having two different contact portions, four conductive layers, and three metallic elements, wherein each of the two contact portions of the type n semiconductor are in contact with a first conductive layer and a second conductive layer, each of the two contact portions of the type p semiconductor are in contact with a third conductive layer and a fourth conductive layer, a first metallic element is in contact with the first conductive layer and the third conductive layer, the first conductive layer being in contact with the type n semiconductor, the third conductive layer being in contact with the type p semiconductor, a second metallic element is in contact with the second conductive layer, the second conductive layer being in contact with the type n semiconductor, and a third metallic element is in contact with the fourth conductive layer, the fourth conductive layer being in contact with the type p semiconductor.

A computer implemented method, a system and computer program for time-domain phasor simulation of a power grid in an EMT simulation software are provided. The method a) builds a grid impedance matrix from passive electrical elements; b) separates the grid impedance matrix into real and imaginary parts; c) computes an inverse matrix of the real and imaginary parts of the grid impedance matrix, the inverse of the real part being named conductance matrix and the inverse of the imaginary part being named susceptance matrix; d) computes nodal current injections from active elements or sources; e) separates the computed nodal current injections into real and imaginary parts; f) executes (extended) nodal analysis algorithm on the conductance matrix with the real and imaginary parts of the current injection and on the susceptance matrix with the real and imaginary parts of the current injection, obtaining four voltage vectors; and g) builds a complex nodal voltage vector using the four voltage vectors.

A method for producing a 3D printed bone graft and a 3D printed bone graft are proposed. The method comprises a) preparing a photocurable composite resin composition by mixing a photocurable biocompatible polymeric resin, comprising one or more monomers/oligomers and a photoinitiator, with a hydrolysable calcium phosphate-based ceramic material; b) manufacturing a 3D printed bone graft using the photocurable resin composition through 3D printing with a light-based 3D printing system; c) cleaning and removing uncured resin or particles from the 3D printed bone graft by ultrasonic rinsing in a solvent; d) providing consolidation to the 3D printed bone graft by: d1) sublimating liquid contained in the resin by freeze-drying the manufactured 3D printed bone graft; and/or d2) hydrolyzing the hydrolysable calcium phosphate-based ceramic material to calcium deficient hydroxyapatite (CDHA).

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It is disclosed a system for extruding cementitious material comprising:- at least one pump (30, 34) of cementitious material;- at least one pump (31) of additive for cementitious material;- a mixing chamber (10) comprising a cementitious material inlet (11) and an inlet (12) of additive for cementitious material; and being configured to mix the cementitious material with the additive for cementitious material forming a printing composition;- an extruder (20) for extruding at least one layer of the printing composition;- a control unit;wherein the extruder (20) comprises at least one temperature sensor (T1), and the mixing chamber (10) comprises at least one pressure sensor (P1) at the cementitious material inlet (11), each sensor (T1, P1) being operatively connected to the control unit, which is configured to adjust the amount of additive for cementitious material in the printing composition.It is also disclosed a method for extruding cementitious material and a system for additive manufacturing of a cementitious material-based structure.

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