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Mostrando ítems 21-40 de 19642
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2023, Casals y el azar
Artículo escrito con motivo del cincuenta aniversario de la muerte de Pau Casals. -
25 years of continuous sewage sludge application vs. mineral fertilizers on a calcareous soil affected pH but not soil carbonates
De Soto García, I. S. ; Zamanian, Kazem; Urmeneta Martín-Calero, Henar; Enrique Martín, Alberto ; Virto Quecedo, Íñigo (Frontiers Media, 2022) Artículo / ArtikuluaInorganic and organic fertilizers have been widely used to maintain crop yields. However, several studies have demonstrated that the dissolution of carbonates in agricultural soils by the acidification induced by N-fertilizers ... -
250 km ultra long remote sensor system based on a fiber loop mirror interrogated by an OTDR
Bravo Acha, Mikel ; Baptista, José Manuel; Santos, José Luís; López-Amo Sáinz, Manuel ; Frazão, Orlando (Optical Society of America, 2011) Artículo / ArtikuluaA 253 km ultra long remote displacement sensor system based on a fiber loop mirror interrogated by a commercial OTDR is proposed and experimentally demonstrated. The use of a fiber loop mirror increases the signal to noise ... -
3 Dimensional N Body Simulator
This thesis is based on the development of a simulation software for the N-body problem, attempting to provide a modern program to improve upon existing simulators. To achieve this, the N-body problem will be explained, ... -
A 3-D indoor analysis of path loss modeling using kriging techniques
Diago Mosquera, Melissa; Aragón Zavala, Alejandro; Azpilicueta Fernández de las Heras, Leyre ; Shubair, Raed M.; Falcone Lanas, Francisco Javier (IEEE, 2022) Artículo / ArtikuluaThis study proposes a novel measurement-based method to predict and model three-dimensional (3-D) path loss in indoor scenarios, which first regresses 28 GHz measurements via median path loss modeling and then includes ... -
3-D printed horn antennas and components performance for space and telecommunications
Teniente Vallinas, Jorge; Iriarte Galarregui, Juan Carlos; Caballero Nagore, Rubén; Valcázar Berdofe, Daniel; Goñi, Mikel; Martínez, Aitor (IEEE, 2018) Artículo / ArtikuluaIn this work, a study of the performance of several antennas and components, manufactured using an accurate stereolithography 3D printer and resin for maximum accuracy and detail, is carried out. Electroless plating of ... -
3-D-printed transmit-array antenna for broadband backhaul 5G links at V-band
Matos, Sérgio A.; Teixeira, Jorge P.; Costa, Jorge R.; Fernandes, Carlos A.; Río Bocio, Carlos del (IEEE, 2020) Artículo / ArtikuluaThe low cost and compactness of transmit-array antennas (TAs) make them attractive for 5G backhaul links. However, the TA advantage is less obvious when considering the broadband operation requirement. Two main factors ... -
300 GHz optoelectronic transmitter combining integrated photonics and electronic multipliers for wireless communication
Ali, Muhsin; Pérez Escudero, José Manuel ; Guzmán Martínez, Robinson Cruzoe; Lo, Mu Chieh; Ederra Urzainqui, Íñigo ; Gonzalo García, Ramón ; García Muñoz, Luis Enrique (MDPI, 2019) Artículo / ArtikuluaTHz communications systems at carrier frequencies above 200 GHz are the key to enable next-generation mobile communication networks with 100 Gbit/s wireless data rates. One of the key questions is, which carrier frequency ... -
360 nW gate-driven ultra-low voltage CMOS linear transconductor with 1 MHz bandwidth and wide input range
Rico-Aniles, Héctor Daniel; Ramírez-Angulo, Jaime; López Martín, Antonio ; González Carvajal, Ramón (IEEE, 2020) Artículo / ArtikuluaA low voltage linear transconductor is introduced. The circuit is a pseudo differential architecture that operates with ±0.2V supplies and uses 900nA total biasing current. It employs a floating battery technique to achieve ... -
3D editor of custom guitars, web page and an order management system embedded in a local company
This project proposes a software solution that results from the interaction between the web page and an Android app we have implemented, and the manufacturing processes of the company. The novelty of this approach is to ... -
3D estereoscópico. Estudio de los fundamentos y metodología de visionado, grabación y edición de la tecnología estereoscópica actual y elaboración de un cortometraje aplicando dichos conocimientos
Este trabajo intenta recopilar información en una guía sobre el proceso estereoscópico, abarcando tanto la teoría en la que se fundamenta como las claves para un buen uso práctico. En el primer capítulo se explicarán las ... -
3D mapping
El 3D mapping es una nueva forma de espectáculo que cada día está utilizándose con mayor frecuencia. También es llamado “proyection mapping”, “building proyection” o “video mapping”. Consiste en proyectar imágenes sobre ... -
3D Multi-class CNN implementation for abdominal aortic aneurysm segmentation
El Aneurisma de Aorta Abdominal (AAA) es una dilatación progresiva de la aorta abdominal producida por el debilitamiento y la degradación de la región. Es una condición que compromete a la vida y requiere constante ... -
3D procedures manual included in the app Arsim2care
San Martín Rodríguez, Leticia ; Soto Ruiz, María Nelia ; Ballesteros Egüés, Tomás ; Escalada Hernández, Paula (2019) Libro / LiburuaThis manual has been developed within the “ARsim2care: Augmented reality application in clinical simulation” Project funded by the European Union Erasmus + Program, and it is one of the project’s intellectual outputs. The ... -
A 3D ray launching time-frequency channel modeling approach for UWB ranging applications
Otim, Timothy ; López Iturri, Peio ; Azpilicueta Fernández de las Heras, Leyre ; Bahillo, Alfonso; Falcone Lanas, Francisco Javier (IEEE, 2020) Artículo / ArtikuluaUltrawideband (UWB) has the ability to achieve decimetre level of ranging accuracy, hence, its wider usage nowadays in the field of positioning. In spite of the attractiveness of UWB, its performance is strongly dependent ... -
3D-printable composites for magnetic refrigeration based on Ni-Mn-In-Co shape memory alloys
Las aleaciones con memoria de forma metamagnética (MMSMA) Ni-Mn-Z (Z = In, Sn y Sb) han atraído un gran interés en las últimas décadas debido a sus propiedades asociadas con una transformación estructural llamada ... -
3D-printed 96 GHz bull’s-eye antenna with off-axis beaming
Beaskoetxea Gartzia, Unai ; Maci, Stefano; Navarro Cía, Miguel ; Beruete Díaz, Miguel (IEEE, 2017) Artículo / ArtikuluaReducing the profile, footprint and weight of antennas embarked on aircrafts, drones or satellites has been a long pursued objective. Here we tackle this issue by developing a millimeter-wave 96 GHz elliptical Bull’s-Eye ... -
The 3D-printing fabrication of multichannel silicone microreactors for catalytic applications
Ibáñez de Garayo Quilchano, Alejandro; Imizcoz Aramburu, Mikel; Maisterra Udi, Maitane ; Almazán, Fernando; Sanz Carrillo, Diego; Bimbela Serrano, Fernando ; Cornejo Ibergallartu, Alfonso ; Pellejero, Ismael ; Gandía Pascual, Luis (MDPI, 2023) Artículo / ArtikuluaMicrostructured reactors (MSRs) are especially indicated for highly demanding heterogeneous catalysis due to the small channel dimensions that minimize diffusional limitations and enhance mass and heat transport between ... -
3D-ray launching MIMO channel geometric estimation
Rodríguez Corbo, Fidel Alejandro; Azpilicueta Fernández de las Heras, Leyre ; Celaya Echarri, Mikel ; Shubair, Raed M.; Falcone Lanas, Francisco Javier (IEEE, 2022) Artículo / ArtikuluaThe complete multiple-input–multiple-output (MIMO) channel simulation in deterministic techniques can be a computationally intensive task, due to the inherent scenario’s complexity and number of antennas. The spatial ... -
4ª Edición de la Escuela de Verano de Ecología de la UPNA 2018
Canals Tresserras, Rosa María ; Peralta de Andrés, Francisco Javier (Asociación Española de Ecología Terrestre (AEET), 2018) Otros / BestelakoakNoticia de la celebración de la cuarta edición de la Escuela de Verano de Ecología de la Universidad Pública de Navarra (UPNA), los días 3 y 4 de septiembre de 2018, en el Parque Natural del Señorío de Bertiz (Navarra), ...