Browsing by Author "Hernández Díaz, David"Més informacióMés informació

Now showing items 1-20 of 24

    • 3D metallo-dielectric structures combining electrochemical and electroplating techniques 

      Hernández Díaz, David; Lange, D.; Todorov Trifonov, Trifon; Garin Escriva, Moises; García Molina, Francisco Miguel; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010-06)
      Article
      Restricted access - publisher's policy
      Three-dimensional (3D) periodic nickel micro-structures with a periodicity of 4 μm and high number of structural periods were fabricated by electrodeposition. Macroporous silicon, consisting of periodic arrays of sine-wave ...

    • Agustin de Betancourt's telegraph: study and virtual reconstruction 

      Villar Ribera, Ricardo Alberto; Hernández Abad, Francisco; Rojas Sola, José Ignacio; Hernández Díaz, David (2011-06)
      Article
      Open Access
      Es presenta una revisió històrica del telègraf d'Agustin de Betancourt i se n'analitzen les seves característiques tècniques. Es presenten de manera analítica, numèrica i gràfica algunes de les declaracions fetes sobre el ...

    • Blackbody behaviour from spiked macroporous silicon photonic crystals 

      Vega Bru, Didac; Todorov Trifonov, Trifon; Hernández Díaz, David; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2011)
      Conference lecture
      Restricted access - publisher's policy
      Photonic Crystals (PhC) are structured materials, which show very attractive optical properties. In this report, we study and discuss the reflection and emission characteristics of a “black face” Macro-porous Silicon (MpSi) ...

    • Catalytic membrane reactors based on macroporous silicon for hydrogen production 

      Vega Bru, Didac; Hernández Díaz, David; López, E.; Jiménez, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Llorca Piqué, Jordi (2010)
      Conference report
      Open Access
      The typology of using hydrogen as an energy carrier and its implementation in portable fuel cells has motivated a considerable research interest in the development of new efficient hydrogen production technologies. Hydrogen ...

    • Computer-aided design: development of a software tool for solving loci problems 

      Hernández Díaz, David; Hernández Abad, Francisco; Hernández Abad, Vicente; Villar Ribera, Ricardo Alberto; Julian, Fernando; Rojas Sola, Jose Ignacio (2023)
      Article
      Open Access
      In this work, we developed a software tool for the simplified, automated definition and viewing of loci in the plane, an essential task in the design, engineering and architectural fields. The process was started by ...

    • Computer-aided sketching: incorporating the locus to improve the three-dimensional geometric design 

      Rojas Sola, Jose Ignacio; Hernández Díaz, David; Villar Ribera, Ricardo Alberto; Hernández Abad, Vicente; Hernández Abad, Francisco (2020-07-16)
      Article
      Open Access
      This article presents evidence of the convenience of implementing the geometric places of the plane into commercial computer-aided design (CAD) software as auxiliary tools in the computer-aided sketching process. Additionally, ...

    • Dibujos anaglíficos: su optimización y aplicación a la enseñanza técnica universitaria 

      Fernández Sora, Alberto; Serrano-Tierz, Ana; Rojas Sola, José Ignacio; Hernández Díaz, David (2011-06)
      Article
      Restricted access - publisher's policy
      La presente investigación aplica el procedimiento anaglífico a partir de los conocimientos que se disponen sobre la visión estereoscópica y los dibujos anaglíficos, con la intención de que desaparezca la dificultad que ...

    • Diseño gráfico mediante tratamiento de listas numéricas y su aplicación al diseño textil 

      Hernández Abad, Francisco; Ochoa Vives, Manuel; Hernández Abad, Vicente; Font Andreu, Jorge; Hernández Díaz, David; López Martínez, Joan Antoni; Villar Ribera, Ricardo Alberto (UNIVERSIDAD DE SANTIAGO DE COMPOSTELA, 2009)
      Conference report
      Open Access
      De todos es conocida la fuerte relación existente entre el diseño, la geometría y las matemáticas, pero hay disciplinas en las que esta realidad se hace mucho más evidente. Una de estas disciplinas es la de Diseño Textil. ...

    • Docencia de cinemática con el simulador de mecanismos ATiCA4b 

      López Martínez, Joan Antoni; Font Andreu, Jorge; Hernández Abad, Francisco; Hernández Díaz, David (2010)
      Conference lecture
      Restricted access - publisher's policy
      Se presenta un ejemplo de las posibilidades que tenemos los docentes a la hora de generar material didáctico para nuestros alumnos y alumnas: el simulador ATiCA4b, (Aplicación Trazadora e Interactiva de Curvas de Acoplador ...

    • Educational software to learn the essentials of engineering graphics 

      Hernández Abad, Francisco; Rojas Sola, José Ignacio; Hernández Abad, Vicente; Ochoa Vives, Manuel; Font Andreu, Jorge; Hernández Díaz, David; Villar Ribera, Ricardo Alberto (John Wiley & Sons, 2010)
      Article
      Open Access
      This paper presents a novel educational software package which develops an Interactive Didactic Application (IDA) generated in the Polytechnic University of Catalonia (UPC), and which contains the essentials of Engineering ...

    • Impact properties and water uptake behavior of old newspaper recycled fibers-reinforced polypropylene composites 

      Hernández Díaz, David; Villar Ribera, Ricardo Alberto; Espinach, Francesc Xavier; Julian, Fernando; Hernández Abad, Vicente; Delgado Aguilar, Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2020-02-28)
      Article
      Open Access
      Natural fiber-reinforced thermoplastic composites can be an alternative to mineral fiber-based composites, especially when economic and environment concerns are included under the material selection criteria. In recent ...

    • Indoor PM2.5 removal efficiency of two different non-thermal plasma systems 

      Hernández Díaz, David; Martos Ferreira, David; Hernández Abad, Vicente; Villar Ribera, Ricardo Alberto; Tarrés Farrés, Joaquim Agustí; Rojas Sola, José Ignacio (2021-01-15)
      Article
      Open Access
      The use of non-thermal plasma (NTP) generators in air processing systems and their duct networks to improve indoor air quality (IAQ) has grown considerably in recent years. This paper reviews the advantages and disadvantages ...

    • Interactive educational software of textile design 

      Hernández Abad, Francisco; Rojas Sola, José Ignacio; Hernández Abad, Vicente; Ochoa Vives, Manuel; Font Andreu, Jorge; Hernández Díaz, David; Villar Ribera, Ricardo Alberto (John Wiley & Sons, 2012-03)
      Article
      Restricted access - publisher's policy
      This article presents a novel educational software package which develops an Interactive Didactic Application (IDA) created by the Polytechnic University of Catalonia (UPC), and which contains the essentials of textile ...

    • Interactive educational software of textile desing 

      Hernández Abad, Francisco; Rojas Sola, José Ignacio; Hernández Abad, Vicente; Ochoa Vives, Manuel; Font Andreu, Jorge; Hernández Díaz, David; Villar Ribera, Ricardo Alberto (John Wiley & Sons, 2010)
      Article
      Open Access
      This paper presents a novel educational software package which develops an Interactive Didactic Application (IDA) created in the Polytechnic University of Catalonia (UPC), and which contains the essentials of Textile ...

    • Interface strength and fiber content influence on corn stover fibers reinforced bio-polyethylene composites stiffness 

      Tarrés Farrés, Joaquim Agustí; Hernández Díaz, David; Ardanuy Raso, Mònica (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-01)
      Article
      Open Access
      Stiffness of material is a key parameter that allows the use of material for structural or semi-structural purposes. Besides, lightweight materials are increasingly calling the attention of the industry. Environmental ...

    • Macroporous silicon : a next generation catalytic monolith for ethanol steam reforming 

      Vega Bru, Didac; Hernández Díaz, David; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; López, E.; Jiménez, Nuria; Llorca Piqué, Jordi (Publicacions de la Universitat de València (PUV), 2011)
      Conference report
      Restricted access - publisher's policy
      Macroporous silicon membranes, consisting of straight parallel pores with a diameter of 3.3μm and depth/width ratio >60, are used as microreactors for high efficiency hydrogen generation via steam reforming of ethanol. The ...

    • Recerca i tecnologia en enginyeria gràfica i disseny a la Universitat Politècnica de Catalunya 

      García Carrillo, Àgueda; Ramos Cabal, Alba; Datas Medina, Alejandro; Sureda Carbonell, Bàrbara; Faura López de Haro, Bernat; del Cañizo Nadal, Carlos; Valls Vidal, Cristina; Hernández Díaz, David; Mestres Domenech, Francesc; Bermúdez Rodríguez, Francisco; Hernández Abad, Francisco; Peña Andrés, Javier; Ivern Cacho, Jordi; Lapaz Castillo, José Luís; Ibáñez García, José María; Roncero Vivero, María Blanca; López Membrilla, Manuel; Alcaraz Sendra, Olga; Cusola Aumedes, Oriol; Rojas, Orlando J.; Farrerons Vidal, Óscar; Villar Ribera, Ricardo Alberto; Baltà Salvador, Rosó; Castro de Losada, Rubén de; Hernández Abad, Vicente (OmniaScience, 2020-03-02)
      Book
      Open Access
      Els temps canvien cada vegada més ràpidament, i a la universitat això encara es nota més. L’històric departament d‘Expressió Gràfica a l’Enginyeria (EGE) de la Universitat Politècnica de Catalunya, garant d’una docència ...

    • Self-assessment of transversal competences in engineering students 

      Seculí Díaz, Faust; Hernández Díaz, David; Julián Pérez, Fernando; Espinach, Francesc Xavier; Alcalà Vilavella, Manel (International Association of Technology, Education and Development (IATED), 2021)
      Conference lecture
      Restricted access - publisher's policy
      This study show the results of a self-assessment’s competences in engineering students from two Spanish universities, the Polytechnic University of Catalonia (UPC) and the University of Girona (UdG), carried out last year. ...

    • Technical and environmental viability of a road bicycle pedal part made of a fully bio-based composite material 

      Hernández Díaz, David; Villar Ribera, Ricardo Alberto; Serra Parareda, Ferran; Weyler Pérez, Rafael; Sánchez Romero, Montserrat; Rojas Sola, José Ignacio; Julián Pérez, Fernando (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-13)
      Article
      Open Access
      Glass fibre is the most widely used material for reinforcing thermoplastic matrices presently and its use continues to grow. A significant disadvantage of glass fibre, however, is its impact on the environment, in particular, ...

    • Template fabrication of 3D metallic microstructures by electrochemical etching and electroplanting 

      Hernández Díaz, David; Lange, Diego; Todorov Trifonov, Trifon; Garin Escriva, Moises; García Molina, Francisco Miguel; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010)
      Conference report
      Open Access
      In this work, we show that macroporous silicon consisting of periodic arrays of etched pores is a feasible alternative for synthesis of 2D and 3d metallic microstructures due to its flexibility in the definition of complex ...