738 research outputs found
On the development of a new coplanar transmission line based on Gap Waveguide
A combination of gap waveguide technology and the traditional coplanar
waveguide is studied in detail and demonstrated experimentally for the first
time. This novel metamaterial transmission line is presented in three different
configurations and offers a broadband operation, low loss, and low dispersion
characteristics. Analytical expressions for its characteristic impedance and
effective permittivity are provided and validated by Finite Element Method
simulations. The loss and dispersion of the line are analyzed with an Eigenmode
solver. The proposed line prevents the propagation of substrate modes in the
band of operation at the same time it reduces the dielectric loss in the line
due to a higher concentration of the E-field over the air. Moreover, its
coplanar layout facilitates the integration of active components. As such, it
is considered to constitute a potential key element in the development of more
efficient, millimeter wave systems.Comment: To be submitted to MDPI Sensor
Sitios con "hornitos" del Holoceno tardío en el Chaco austral: Colonia Dolores, dpto. San Justo, pcia. de Santa Fe.
Los “hornitos de tierra cocida” son estructuras píricas subterráneas destinadas, fundamentalmente,
a la cocción de alimentos. Asociadas al ambiente del Espinal, ecotono entre el
Chaco y la Pampa, constituyen testimonios de recorridos pedestres que unían, en la llanura
central argentina, las costas próximas al Paraná con el borde de las Salinas Grandes. Se los
encuentra también en las provincias de Chaco y Formosa, Santiago del Estero y La Rioja.
Son marcadores paisajísticos de primer orden, indicando la extensión del Espinal antes del
cambio climático del 1000-800 a.p. En Colonia Dolores (Departamento San Justo, provincia
de Santa Fe) se localizaron tres sitios con hornitos próximos a la desembocadura del arroyo
Cayastá en el Saladillo Amargo. Se los relevó con GPS, se elaboró un mapa que integra éstos
y otros conjuntos de hornos similares del departamento, y se realizaron fechados radiocarbónicos
que los ubican en torno a los 1000 años a.p.The baked clay “hornitos” (small furnaces) are pyric subterranean structures designed primarily
to cook food. Associated to the Spinal environment, ecotone between Chaco and Pampa,
they constitute evidence that links the central plain of Argentina, the coasts near the
Paraná and the edge of the Salinas Grandes. They are found in the provinces of Chaco and
Formosa, Santiago del Estero and La Rioja. They are landscape markers of a first order, indicating
the extent of the climate change Espinal before the 1000-800 b.p. In Colonia Dolores
(Department San Justo, Santa Fe) three site hornitos are located next to the mouth of the
Cayastá creek in the Saladillo Bitter creek. They were positioned with GPS, a map was developed
that integrates these and other similar furnace sets in the department, and radiocarbon
dating was performed, placing them around 1000 years b.p.Fil: Cornero, Silvia - Escuela de Antropología y Museo Universitario F. y C. Ameghino, FCEIA, UNR.Fil: del Río, Paula - Museo Universitario F. y C. Ameghino FCEIA, UNR.Fil: Ceruti, Carlos - CONICET, Museo Cs. Nat. y Antropológicas “Prof. A. Serrano” (Paraná)
The Bad, the Good, and the Ugly about Oxidative Stress
Alzheimer's disease (AD), Parkinson's disease (PD), and cancer (e.g., leukemia) are the most devastating disorders affecting millions of people worldwide. Except for some kind of cancers, no effective and/or definitive therapeutic treatment aimed to reduce or to retard the clinic and pathologic symptoms induced by AD and PD is presently available. Therefore, it is urgently needed to understand the molecular basis of these disorders. Since oxidative stress (OS) is an important etiologic factor of the pathologic process of AD, PD, and cancer, understanding how intracellular signaling pathways respond to OS will have a significant implication in the therapy of these diseases. Here, we propose a model of minimal completeness of cell death signaling induced by OS as a mechanistic explanation of neuronal and cancer cell demise. This mechanism might provide the basis for therapeutic design strategies. Finally, we will attempt to associate PD, cancer, and OS. This paper critically analyzes the evidence that support the “oxidative stress model” in neurodegeneration and cancer
The research performance of the European Commission’s Science and Knowledge Service, Joint Research Centre (2007-2015) - A bibliometric analysis
This report presents an assessment of the JRC's scientific and technical research activities in the period 2007-2015, focusing on research outputs and citation impact. The aim of the report is to inform a panel of independent experts, who will carry out an implementation review of the JRC half way the EU Framework Programme for Research and Innovation, Horizon 2020. The report provides information on the number of JRC research publications and the scientific impact of those publications, based on data and metrics derived from Thomson Reuter’s InCites platform and the Web of Science database.JRC.B.7-Knowledge for Finance, Innovation and Growt
Poemas para ella y para aquella
Y nos cogimos de las manos como si nunca fuéramos a soltárnoslas. En ese recorrido delírium trémens, tembloroso, abstinente, agudo en su etapa; fui, fuiste, me fui, volviste, volví, volvimos, ayer no era hoy, hoy no era ayer. Las manos seguían agarradas por algún hilo mágico del amor. Pero solo era eso, no lo acompañaba obligaciones legales, ni la bendición sagrada o papeles de capitulación. Hoy, no lo sé, mis manos sudan, las tuyas son tibias o a veces frías; pero de alguna manera siguen rebeldes, tercas y agarradas. Salud
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