Now showing items 21-40 of 61

    • A multi-year analysis of traffic accidents involving agricultural tractors 

      Arnal Atarés, Pedro Upna; López-Maestresalas, Ainara Upna; Arazuri Garín, Silvia Upna; Mangado Ederra, Jesús Upna; Jarén Ceballos, Carmen Upna (AIDIC, 2017)   Artículo / Artikulua  OpenAccess
      The agricultural sector in Spain is responsible for a high rate of accidents every year, and many of them are traffic accidents. Tractors are a relatively rare sight on roads, meaning that the incidence of accidents involving ...
    • Non-destructive detection of blackspot in potatoes by Vis-NIR and SWIR hyperspectral imaging 

      López-Maestresalas, Ainara Upna; Keresztes, Janos C.; Goodarzi, Mohammad; Arazuri Garín, Silvia Upna; Jarén Ceballos, Carmen Upna; Saeys, Wouter (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Blackspot is a subsurface potato damage resulting from impacts during harvesting. This type of bruising represents substantial economic losses every year. As the tubers do not show external symptoms, bruise detection in ...
    • Phytochemicals determination and classification in purple and red fleshed potato tubers by analytical methods and near infrared spectroscopy 

      Tierno, Roberto; López-Maestresalas, Ainara Upna; Riga, Patrick; Arazuri Garín, Silvia Upna; Jarén Ceballos, Carmen Upna; Ruiz de Galarreta, José Ignacio Upna (Wiley, 2016)   Artículo / Artikulua  OpenAccess
      BACKGROUND: Over the last two decades, the attractive colours and shapes of pigmented tubers and the increasing concern about the relationship between nutrition and health have contributed to the expansion of their ...
    • Bulk optical of potato flesh in the 500 – 1900 nm range 

      López-Maestresalas, Ainara Upna; Aernouts, Ben; Beers, Robbe van; Arazuri Garín, Silvia Upna; Jarén Ceballos, Carmen Upna; Baerdemaeker, Josse de; Saeys, Wouter (Springer US, 2015)   Artículo / Artikulua  OpenAccess
      In this study, the optical properties of potato flesh tissue were estimated using double-integrating sphere (DIS) measurements combined with an inverse adding-doubling (IAD) light propagation model. Total reflectance, ...
    • A review of the application of near-infrared spectroscopy for the analysis of potatoes 

      López-Maestresalas, Ainara Upna; Arazuri Garín, Silvia Upna; García Ruiz, Ignacio Upna; Mangado Ederra, Jesús Upna; Jarén Ceballos, Carmen Upna (American Chemical Society, 2013)   Artículo / Artikulua  OpenAccess
      Potato (Solanum tuberosum L.) is one of the most important crops in the world being considered as a staple food in many developing countries. The potato industry like other vegetable and fruit industries is subject to the ...
    • Sulfate soils stabilization with magnesium-based binders 

      Seco Meneses, Andrés Upna; Miqueleiz, Luis; Prieto Cobo, Eduardo Upna; Marcelino Sádaba, Sara Upna; García, Beñat; Urmeneta, Pablo (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Sulfate soils' stabilization is a very interesting subject with technical, economic and environmental implications. The difficulty of their stabilization is due to the fact that the usual stabilizer additives are based ...
    • Estimated and real durability of unfired clay bricks: Determining factorsand representativeness of the laboratory tests 

      Seco Meneses, Andrés Upna; Urmeneta, Pablo; Prieto Cobo, Eduardo Upna; García, Beñat; Miqueleiz, Luis (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      This paper presents an analysis of the representativeness of the main laboratory tests and the real dura-bility of earth-based construction materials. For this study, a natural marl soil, mixed with different per-centages ...
    • Magnesium oxide as alternative binder for unfired clay bricks manufacturing 

      Espuelas Zuazu, Sandra Upna; Omer, Joshua; Marcelino Sádaba, Sara Upna; Echeverría, Angel María; Seco Meneses, Andrés Upna (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Replacement of fired bricks by unfired ones could be an effective way to reduce the building industryenvironmental footprint: Their manufacture not only requires less energy and natural resources but alsogenerates less waste. ...
    • Sustainable unfired bricks manufacturing from construction anddemolition wastes 

      Seco Meneses, Andrés Upna; Omer, Joshua; Marcelino Sádaba, Sara Upna; Espuelas Zuazu, Sandra Upna; Prieto Cobo, Eduardo Upna (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      The management of construction and demolition wastes is a huge challenge for most Governments. Thegreatest component of such wastes is concrete and masonry fragments or remains. Among the most com-mon approaches to ...
    • Effect of initial step height on headcut development in upland concentrated flows 

      Bennett, S.J.; Casalí Sarasíbar, Javier Upna (American Geophysical UnionWiley, 2001)   Artículo / Artikulua  OpenAccess
      Experiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory ...
    • Evaluation of a gully headcut retreat model using multitemporal aerial photographs and digital elevation models 

      Campo-Bescós, Miguel Upna; Flores Cervantes, J. H.; Bras, R. L.; Casalí Sarasíbar, Javier Upna; Giráldez Cervera, Juan Vicente (American Geophysical UnionWiley, 2013)   Artículo / Artikulua  OpenAccess
      A large fraction of soil erosion in temperate climate systems proceeds from gully headcut growth processes. Nevertheless, headcut retreat is not well understood. Few erosion models include gully headcut growth processes, ...
    • Technical and environmental characterization of hydraulic and alkaline binders 

      Espuelas Zuazu, Sandra Upna; Echeverría, Angel María; Marcelino Sádaba, Sara Upna; Prieto Cobo, Eduardo Upna; Seco Meneses, Andrés Upna (Elsevier, 2018)   Artículo / Artikulua
      Portland cement is a widely used binder in construction and building applications because of its good properties. Despite its convenience as construction material, the social demands and policies trends are requesting a ...
    • Desarrollo de productos avanzados para la misión SEOSAT/Ingenio 

      Sabater, N.; Ruiz Verdú, A.; Delegido, J.; Fernández Beltrán, R.; Latorre Carmona, P.; Pla, F.; González de Audícana Amenábar, María Upna; Álvarez-Mozos, Jesús Upna; Sola Torralba, Ion Upna; Villa, G.; Tejeiro, J. A.; Miguel, E. de; Jiménez, M.; Molina, S.; Moreno, J. (Universitat Politecnica de Valencia, 2016)   Artículo / Artikulua  OpenAccess
      SEOSAT/Ingenio es la futura misión española de observación de la Tierra en el óptico en alta resolución espacial. Mientras que los productos de imagen a Nivel 1, radiancias geo-referenciadas a nivel de sensor, se encuentran ...
    • Beyond precipitation: physiographic gradients dictate the relative importance of environmental drivers on savanna vegetation 

      Campo-Bescós, Miguel Upna; Muñoz Carpena, Rafael Upna; Kaplan, David A.; Southworth, Jane; Zhu, Likai; Waylen, Peter (Public Library of Science, 2013)   Artículo / Artikulua  OpenAccess
      Background: Understanding the drivers of large-scale vegetation change is critical to managing landscapes and key to predicting how projected climate and land use changes will affect regional vegetation patterns. This ...
    • Caracterización del modelo HEC-HMS en la cuenca de río Arga en Pamplona y su aplicación a cinco avenidas significativas 

      López Rodríguez, José Javier Upna; González, Miguel; Scaini, Anna; Goñi Garatea, Mikel Upna; Valdenebro García, José Vicente Upna; Gimena Ramos, Faustino Upna (Universidad Católica de la Santísima Concepción (Chile), 2012)   Artículo / Artikulua  OpenAccess
      Pamplona es una ciudad que es atravesada por el río Arga a lo largo de una llanura aluvial, que es susceptible de inundaciones cuando se producen avenidas de cierta magnitud. Ante esta situación es importante contar con ...
    • Monitoring water vapour with GNSS during a heavy rainfall event in the Spanish Mediterranean area 

      Priego, E.; Jones, J.; Porres, M. J.; Seco Meneses, Andrés Upna (Taylor & Francis, 2017)   Artículo / Artikulua  OpenAccess
      The Spanish Mediterranean area is periodically affected by torrential rainfall events during autumn. In September 2012, one of these episodes took place with up to 50 mm of rain in a 1-hour period and with more than 300 ...
    • Mathematical models to describe the volumetric shrinkage rate of red beans during drying 

      Correa, P. C.; Resende, O.; Arazuri Garín, Silvia Upna; Jarén Ceballos, Carmen Upna; Oliveira, Gabriel H. H. de (Associação Brasileira de Engenharia Agrícola, 2011)   Artículo / Artikulua  OpenAccess
      The present study aimed to determine the volumetric shrinkage rate of bean (Phaseolus vulgaris L.) seeds during air-drying under different conditions of air, temperature and relative humidity, and to adjust several ...
    • Runoff, nutrients, sediment and salt yields in an irrigated watershed in southern Navarre (Spain) 

      Merchán Elena, Daniel Upna; Casalí Sarasíbar, Javier Upna; Valle de Lersundi, Jokin del; Campo-Bescós, Miguel Upna; Giménez Díaz, Rafael Upna; Preciado, Beatriz; Lafarga, Alberto (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      The environmental impact of irrigated agriculture on water quality was assessed in Landazuria watershed (Navarre, northeast Spain), a 479.5 ha watershed with 53% of irrigated agricultural land. In the framework of a long-term ...
    • Hallazgo de treintaiséis nuevas estelas de Navarra 

      Ukar Muruzábal, Jesús Upna (Gobierno de Navarra. Institución Príncipe de Viana, 1993)   Artículo / Artikulua  OpenAccess
      El presente estudio describe el hallazgo de 31 nuevas estelas de Navarra.
    • Tipología, tipometría y técnicas escultóricas utilizadas en las estelas de Navarra 

      Ukar Muruzábal, Jesús Upna (Gobierno de Navarra. Institución Príncipe de Viana, 1993)   Artículo / Artikulua  OpenAccess
      Este trabajo pretende diferenciar formalmente una serie de modelos de estelas discoideas, en base a la estructura del disco, del pie, del canto y de las relaciones entre ellos.