Congresos 2021
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Publication Open Access Experimental development of a novel thermoelectric generator without moving parts to harness shallow hot dry rock fields(2021) AlegrĆa CĆa, Patricia; RodrĆguez GarcĆa, Antonio; CatalĆ”n Ros, Leyre; Astrain Ulibarrena, David; Araiz Vega, Miguel; IngenierĆa; Institute of Smart Cities - ISC; IngeniaritzaNowadays, geothermal energy in shallow hot dry rocks is not exploited enough due to the high economic and environmental impact as well as the lack of scalability of the existing technologies. Here, thermoelectricity has a great future potential due to its robustness, absence of moving parts and modularity. With this research, the feasibility of a novel and robust geothermal thermoelectric generator whose working principle is phase change has been experimentally demonstrated, as well as the importance of compactness to maximize its efficiency and thus, power generation.Publication Open Access PhantomFields: fast time and spatial multiplexation of acoustic fields for generation of superresolution patterns(2021) Elizondo MartĆnez, Sonia; GoƱi Carnicero, Jaime; Galar Idoate, Mikel; Marzo PĆ©rez, Asier; EstadĆstica, InformĆ”tica y MatemĆ”ticas; Estatistika, Informatika eta MatematikaUltrasonic fields generated by phased arrays can be tailored to obtain a custom pattern of acoustic radiation forces. These force fields can pattern particles as well as be felt by the human hand, enabling applications for bioprinting and contactless haptic devices. The forcĆ© fields can be switched orders of magnitude faster than the reaction time of the particles that it pushes or the human mechanoreceptors of touch. Therefore, a quick multiplexation in time or in space of different acoustic fields will be perceived as the average field. In this paper, we optimise the non-linear problem of decomposing a target force field into several multiplexed acoustic fields. We create averaged fields, PhantomFields, that cannot be created by a regular (unique) emission of an acoustic field. We improve accuracy by time multiplexation and spatial multiplexation, i.e. quick rotation of the emitters. These processes improve the resolution and strength of the obtained fields without the requirement of new hardware, opening up applications in haptic devices and 3D printing.Publication Open Access Autonomous robot for construction stake out(2021) Zaratiegui FernĆ”ndez, Javier ignacio; Dios UrsuĢa, Carlos Juan de; Marzo PĆ©rez, Asier; EstadĆstica, InformĆ”tica y MatemĆ”ticas; Estatistika, Informatika eta Matematika; Gobierno de Navarra / Nafarroako GobernuaDesign, develop and commercial deployment of an autonomous marking device for construction stake out.Publication Open Access Development and validation of an automatic and intelligent system for medullation and average diameter evaluation to alpaca, llama and mohair fibers(2021) Quispe Bonilla, Max David; Quispe PeƱa, Edgar; Serrano Arriezu, Luis Javier; Trigo Vilaseca, JesĆŗs Daniel; Quispe Bonilla, Christian; Institute of Smart Cities - ISCThe aim of this work was to develop and validate an automatic and intelligent system (based in artificial intelligence) capable of quantify and identify fibers, by type of medullation in 5 categories. This work was carried out in Lima, Peru. To develop the software a trained model was generated based on You Only Look at Once for medullation and DenseNet for average fiber diameter (AFD), using Python. Language C was used to develop the graphical user interface. For the hardware; mechanical, electronic and optical subsystems was design and development. Samples of white alpaca, llama and mohair fibers (2108, 1858, 901 fibers, respectively) were evaluated for identification the fibers medullation. Additionally, AFD of 197 samples of white alpacas were measured with two methods. This system identifies 5 types of medullation and measures the diameter of the fibers. Each sample is evaluated in 40 sec, considering about 1500 fibers/sample. At two-proportion z-test of different fiber medullation types obtained with direct counting and our system no significant differences were found. At t-test of AFD obtained with OFDA device and our system no significant difference were found. The relationship between these methods was very stronger (r=0.95). The use of this system is recommended for fiber evaluation for the purpose of genetic improvement of fibers in animal production; purchase-sale, and processing of fiber to verify the quality of fibers; and research on medullation to increase knowledge about alpaca, llama and mohair fibers.Publication Open Access Experimental study of a multistage thermoelectric heat pump using different internal heat exchangers(2021) Erro Iturralde, Irantzu; Aranguren Garacochea, Patricia; Astrain Ulibarrena, David; IngenierĆa; Institute of Smart Cities - ISC; IngeniaritzaThe current need to carry out an energy transition towards a 100 % renewable horizon places the energy storage as the key. Thermal energy storage has the potential to be an optimal technology. Nowadays electrical resistors are used to convert electrical energy to termal energy by heating an air flux which is stored afterwards. In this work, it is proposed to use a multistage thermoelectric heat pump (MS-TEHP) to do this energy conversion. It has been experimentally analyzed and compared the performance of two MS-TEHP with different internal heat exchangers. With this preliminary research, it has been demonstrated the feasibility of this novel thermoelectric technology which aim is to improve the energy conversiĆ³n process for thermal energy storage.Publication Open Access Smart cities: future trends and challenges 2021(2021) Universidad PĆŗblica de Navarra / Nafarroako Unibertsitate Publikoa. ISC - Institute of Smart Cities; IngenierĆa; Institute of Smart Cities - ISC; IngeniaritzaThe session 'Smart Cities: future trends and challenges - 2021' was held the 17 of December of 2021 in the Public University of Navarre. Its main objective was to convey to the future researchers of the ISC the importance of conducting international research. This was done by inviting renowned experts with international experience as well as holding a poster presentation in English.Publication Open Access Micro sized interdigital capacitor for humidity detection based on agarose coating(2021) Vitoria Pascual, Ignacio; Armas, Dayron; Coronel Camones, Carlos Manuel; Ozcariz Celaya, Aritz; Ruiz ZamarreƱo, Carlos; MatĆas Maestro, Ignacio; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenA micro sized interdigital capacitor has been proposed for the detection of relative humidity. The photolithography technique enables the fabrication of fingers with a size of 10x500 um. A thin film of agarose functionalizes the sensor for humidity sensing, which improves its performance by 155 times, obtaining a sensitivity of 32.98 pF/%RH.Publication Open Access Smarterial ā Smart matter optomagnetic(2021) Irisarri Erviti, Josu; Marzo PĆ©rez, Asier; Galarreta RodrĆguez, Itziar; Estatistika, Informatika eta Matematika; Ingeniaritza; Zientziak; Institute of Smart Cities - ISC; Institute for Advanced Materials and Mathematics - INAMAT2; EstadĆstica, InformĆ”tica y MatemĆ”ticas; IngenierĆa; CienciasSmart materials, also known as programmable materials, are a combination of different components that have the capability to change shape, move around and adapt to numerous situations by applying an external controllable field. Previous works have used optically guided matter or magnetically actuated materials, but similarly to soft robots, they are limited in spatial resolution or strength. Here we propose combining a low temperature thermoplastic polymer Polycaprolactone (PCL) with ferromagnetic powder particles (Fe). Focused light can heat this compound at specific locations and make it malleable. These heated spots can be actuated by external magnetic fields. Once the material cools down, this process can be repeated, or reversed. The compound can be actuated contact-less in the form of 3D slabs, 2D sheets, and 1D filaments. We show applications for reversible tactile displays and manipulation of objects. The laboratory team has characterised the density, weight, magnetic attraction, magnetic force, phase change, thermal and electrical conductivity and heat difusiĆ³n (spread point test) for smart ferromagnetic compounds of different mixture proportions. The main advantages of this smart matter optomagnetic are the high spatial resolution of light and the strong force of magnetic attraction whilst mechanical properties of polymers are practically conserved. Due to the low temperature required and the possibility to use infrared or electromagnetic induction to heat the compound, the smart material can be used in air, water, or inside biological tissue. Eventually, Smart materials will enrich collaborative movements, such as grab and hold, and more complex ones, as reshaping and reassembling.Publication Open Access Analysis and implementation of wireless communications systems and IoT with human body interference in inhomogeneous environments(2021) Picallo Guembe, Imanol; Klaina, Hicham; Azpilicueta FernĆ”ndez de las Heras, Leyre; LĆ³pez Iturri, Peio; Falcone Lanas, Francisco; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenThe Integration of wireless communication systems is one of the main drivers of the development of the future connected society. However, this will cause challenges due to the non-static channel effect and interference impact. For this reason, a research work is proposed that enables to obtain optimal node location in relation to radio planning tasks (coverage/capacity analysis, number of lost packets, devicesā consumption...), as well as to characterize the environments considering obstacles and human body being, in terms of the received power level in the complete simulation volume and at the time domain level. This will help derive wireless channel models taking into account real channel variations to deploy a Wireless Sensor Network (WSN) and reduce the impact on wireless systems performance.Publication Open Access LeviPrint: contactless additive manufacturing using acoustic levitation with position and orientation control of elongated parts(2021) Ezcurdia Aguirre, ĆƱigo FermĆn; Morales GonzĆ”lez, Rafael; Marzo PĆ©rez, Asier; EstadĆstica, InformĆ”tica y MatemĆ”ticas; Estatistika, Informatika eta MatematikaLeviPrint assembles small objects in a contactless way using ultrasonic phased-arrays and optimization algorithms. We explore a set of methods that enables 6 Degrees-of-Freedom (DoF) control of elongated bodies. We then evaluate different ultrasonic arrangements to optimize the manipulation of these bodies. The combination of arrangements and optimization algorithms allow us to levitate, orientate and assemble complex objects. These techniques and arrangements can be leveraged for the microfabrication of electromechanical components and in-vivo additive manufacturing. We highlight the reduction of cross-contamination and the capability to manufacture inside closed containers from the outside.Publication Open Access Implementation of artificial intelligence algorithms in climatic zoning according with energy demand in dwellings. A european case(2021) Llorente Yoldi, Javier; GastĆ³n Romeo, MartĆn; FrĆas Paredes, Laura; Ur Rehman, Hassam; EstadĆstica e InvestigaciĆ³n Operativa; Institute of Smart Cities - ISC; Estatistika eta Ikerketa OperatiboaScience has shown, based on data and knowledge, that there is clear evidence that global warming is not a transient effect, and that it is caused mainly by human activity. The consequences of climate change can be noted and quantified nowadays, but the worst thing is that these impacts are expected to intensify in the coming decades. Obviously, global problems require global solutions, and even if there are certain difficulties to define a clear path, there is no doubt that the worldwide efforts should lead to keep the global temperatura increase to well below 1.5ĀŗCPublication Open Access Virtual reality environments for cognitive and motor rehabilitation(2021) Ćlvarez Cubillo, Yaiza; Astrain Escola, JosĆ© Javier; EstadĆstica, InformĆ”tica y MatemĆ”ticas; Estatistika, Informatika eta MatematikaVirtual reality (VR) consists of the sensory immersion of the user in an artificially generated environment. Head mounted Displays (HMDs) are usually used to introduce the user into these VR environments. Although the most common use of VR is more focused on video games, it has been also researched for its use in learning environments, focusing on cognitive and functional rehabilitation. The benefit of this is that multiple customizable environments or situations can be created, without the limitations of real physical scenarios. Real-life situations can be simulated, helping the user to enhance learning and skill development to everyday circumstances, without the risks or resources present in real life circumstances.Publication Open Access Optical biosensors: a quick overview(2021) Imas GonzĆ”lez, JosĆ© Javier; Ruiz ZamarreƱo, Carlos; MatĆas Maestro, Ignacio; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenThis work aims to provide a brief overview of the latest trends in the domain of optical biosensors.Publication Open Access Contributions of artificial intelligence to low resolution renal multiparametric magnetic resonance analysis(2021) Oyarzun DomeƱo, Anne; Villanueva Larre, Arantxa; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenArterial spin labeling (ASL), is a Multiparametric Magnetic Resonance Imaging (MRI) technique used to quantify and evaluate Renal Blood Flow (RBF) and detect perfusion failure by labelling blood water as it flows throughout the kidney. This study aims at providing an automatic quantifying and evaluation tool for Chronic Kidney Disease (CKD) patientsās follow-up.Publication Open Access Coupling in multilayer devices(2021) Jarauta Ayensa, Eduardo; Falcone Lanas, Francisco; IngenierĆa; Institute of Smart Cities - ISC; IngeniaritzaNovel design for devices in multilayer stacked is proposed. Split Ring resonators and Complementary Split Ring resonators are used, in microstrip or dual stripline-microstrip configuration to build different devices. A double frequency resonator and a multilayer triplexer are presented among the paper.