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Mostrando ítems 1-10 de 14
Artículo
Uniform approximation of continuous mappings by smooth mappings with no critical points on Hilbert manifolds
(Duke University Press, 2004-07-15)
We prove that every continuous mapping from a separable infinitedimensional Hilbert space X into R m can be uniformly approximated by C∞ smooth mappings with no critical points. This kind of result can be regarded as a ...
Artículo
The Efficient Functioning of Photosynthesis and Respiration in Synechocystis sp. PCC 6803 Strictly Requires the Presence of either Cytochrome c6 or Plastocyanin
(Elsevier, 2004)
In cyanobacteria, cytochrome c6 and plastocyanin are able to replace each other as redox carriers in the photosynthetic and respiratory electron transport chains with the synthesis of one or another protein being regulated ...
Artículo
Room temperature synthesis of porous SiO2 thin films by plasma enhanced chemical vapor deposition
(AVS Science and Technology Society, 2004-07)
Synthesis of porous SiO2 thin films in room temperature was carried out using plasma enhanced chemical vapor deposition (CVD) in an electron cyclotron resonance microwave reactor with a downstream configuration.The gas ...
Ponencia
Simulation-based High-level Synthesis of Pipeline Analog-to-Digital Converters
(2004)
This paper presents a toolbox for the time-domain simulation and optimization-based high-level synthesis of pipeline analog-to-digital converters in MATLAB®. Behavioral models of building blocks, including their critical ...
Artículo
On the sensitivity of a marine dispersion model to parameters describing the transfers of radionuclides between the liquid and solid phases
(Elsevier, 2004)
The sensitivity of a marine dispersion model for non-conservative radionuclides, pre viously developed and validated for the English Channel, to parameters describing the exchanges between the liquid and solid phases ...
Artículo
Highly Linear 2,5-V CMOS ΣΔ Modulator for ADSL+
(Institute of Electrical and Electronics Engineers, 2004)
We present a 90-dB spurious-free dynamic range sigma–delta modulator (ΣΔM) for asymmetric digital subscriber line applications (both ADSL and ADSL+), with up to a 4.4-MS/s digital output rate. It uses a cascade (MASH) ...
Artículo
Testicular development in migrant and spawning bluefin tuna (Thunnus thynnus (L.)) from the eastern Atlantic and Mediterranean
(US National Marine Fisheries Services, 2004)
Testis histological structure was studied in bluefin tuna (Thunnus thynnus) from the eastern Atlantic and Mediterranean during the reproductive season (from late April to early June). Testicular maturation was investigated ...
Artículo
Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
(Elsevier, 2004)
Three kinetic models for adsorption/release of 137Cs between water and sediments have been tested when they are included in a previously validated dispersion model of the English Channel. Radionuclides are released to the ...
Artículo
Neotectonics and shoreline history of the Rock of Gibraltar, southern Iberia
(Elsevier, 2004)
Several sets of staircased Quaternary marine deposits can be observed along the Gibraltar coast ranging from 1 to 210 m above the present mean sea level. Geomorphological mapping establishes, from the relationship between ...
Artículo
Low-voltage CMOS log-companding techniques for audio applications
(Springer, 2004)
This paper presents a collection of novel current-mode circuit techniques for the integration of very low-voltage (down to 1 V) low-power (few hundreds of μA) complete SoCs in CMOS technologies. The new design proposal is ...