Listar Artículos de revista - Aldizkari artikuluak por título
Mostrando ítems 5724-5741 de 5741
-
El 'zaldiko' del Privilegio de la Unión: puntualizaciones y correcciones
El rey Carlos III promulgaba el Privilegio de la Unión de Pamplona el 8 de septiembre de 1423. En una copia de dicho privilegio puede verse la imagen de un caballico o zaldiko tocando la cornamusa. Así, la ... -
Zaraitzueraren lekukotasunak XVIII. mende bukaeran: hiru testu zahar eta autore berri bat
En este trabajo hemos estudiado tres sermones escritos en el euskera de Salazar en el siglo xviii. No se hallan los tres en la misma situación, puesto que mientras uno es inédito, los otros dos ya habían sido publicados ... -
Ze ba? eta ze bada? Baztan-Bidasoa inguruko gazteen hizkeran. Aldakuntza linguistikoa abian
Se da cuenta en este artículo de una innovación lingüística que se utiliza en el habla coloquial de los jóvenes de la zona de Baztan-Bidasoa. Se trata, en concreto, del uso de la estructura Ze ba?, como interrogativo, ... -
Zeolite synthesis from aluminum saline slag waste
This work describes the synthetic procedures developed to obtain zeolite X (NaX), zeolite A (LTA) and sodalite (SOD) using aluminum saline slag waste (AlSSW) as aluminum source in a two-step hydrothermal method involving ... -
Zeolite synthesis from industrial wastes
Conventional synthesis conditions for each type of zeolite are tabulated and reported by the International Zeolite Association Structure Commission (IZA) and most of them are synthesized from commercial reagents, but they ... -
Zernike-like systems in polygons and polygonal facets
Zernike polynomials are commonly used to represent the wavefront phase on circular optical apertures, since they form a complete and orthonormal basis on the unit disk. In [Diaz et all, 2014] we introduced a new Zernike ... -
Zero-loss switching in LLC resonant converters under discontinuous conduction mode: analysis and design methodology
Many thriving applications where isolation is required, such as LED drivers, traction and EV fast charging, implement LLC resonant converters, particularly when voltage regulation is not required or an additional ... -
Zero-power-consumption thermoelectric system to prevent overheating in solar collectors
Highly promoted by the European Union Climate and Energy Package for 2020, solar collectors stand out as the most promising alternative to meet water heating demands. One of the most limiting problems in these systems ... -
Zigbee radio channel analysis in a complex vehicular environment [wireless corner]
In this paper, the influence of topology and morphology of a particularly complex scenario for the deployment of ZigBee wireless sensor networks is analyzed. This complex scenario is a car. The existence of loss mechanisms ... -
Zildozko Perutxeneko euskal predikuak (XIX. m.): aurkezpena eta ikerketaren lehen emaitzak
Lan honetan Zildozko (Ezkabarte, Nafarroa) Perutxena etxetik ateratako xix. mendeko euskal sermoi-sorta aurkeztu dut, eta etorkizunean hura ikertzeko gidalerroak eman. Deskribatu ondoren, sakabanaturik egon den corpusa ... -
Zirconia-supported 11-molybdovanadophosphoric acid catalysts: effect of the preparation method on their catalytic activity and selectivity
The oxidation of adamantane with hydrogen peroxide catalyzed by zirconia-supported 11-molybdovanadophosphoric acid is shown to be a suitable green route for the synthesis of adamantanol and adamantanone. This work evaluates ... -
Zirconia-supported tungstophosphoric heteropolyacid as heterogeneous acid catalyst for biodiesel production
A series of materials based on the immobilization of the 12-tungstophosphoric heteropolyacid over zirconia supports have been prepared and applied as heterogeneous acid catalysts in the esterification of palmitic acid with ... -
Zn-Ti-Al layered double hydroxides synthesized from aluminum saline slag wastes as efficient drug adsorbents
This work reports the synthesis of Zinc-Titanium-Aluminum (ZnTiAl) layered double hydroxides (LDH) with various proportions of Al[sbnd]Ti and a Zn/(Al[sbnd]Ti) molar ratio of 3:1 by the co-precipitation method. Two series, ... -
Zoned fishnet lens antenna with reference phase for side lobe reduction
Reduction of first side lobe level and nulls in artificial fishnet metalenses is accomplished here by applying the reference phase concept along with the zoning technique. Higher focusing efficiency is achieved for a ... -
Zoned near-zero refractive index fishnet lens antenna: steering millimeter waves
A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. ... -
Zortziko de Arruazu. Apuntes para su reconstrucción
Este trabajo presenta la reconstrucción del "Zortziko de Arruazu". La reconstrucción de un valioso objeto antiguo requiere un previo y preciso estudio teórico sobre su forma y estilo originales. Identificándose los elementos ... -
α-Hydroxy ketones as masked ester donors in Brønsted base catalyzed conjugate additions to nitroalkenes
The catalyst-controlled enantioselective direct addition reaction of enolizable esters and related carboxylic acid derivatives to p electrophiles remains a difficult synthetic transformation. In this study, the suitability ... -
ε-near-zero (ENZ) graded index quasi-optical devices: steering and splitting millimeter waves
Graded index ε near-zero (GRIN-ENZ) quasi-optical components such as beam steerers and power splitters are designed, simulated and analyzed. The GRIN-ENZ medium is realized using stacked narrow hollow waveguides whose ...