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Now showing items 3691-3700 of 4794
Large size FFTs over time-varying channels
(IET, 2014-06-01)
[EN] In orthogonal frequency division multiplexing (OFDM) signals, the usage of large size fast Fourier transforms (FFTs) reduces the guard interval percentage, and therefore increases the data throughput reducing the data ...
Regioselectivity Change in the Organocatalytic Enantioselective (3+2) Cycloaddition with Nitrones Through Cooperative Hydrogen-Bonding Catalysis/Iminium Activation.
(Wiley-VCH, 2017-01-12)
The reaction of nitrones with enals through iminium
activation can be modulated by using cooperative
hydrogen-bonding catalysis to induce the participation of
a nitrone ylide (C-N-C) instead of the classical C-N-O
dipole. ...
Marine infectious disease dynamics and outbreak thresholds: contact transmission, pandemic infection, and the potential role of filter feeders
(Wiley, 2016-04)
Disease-causing organisms can have significant impacts on marine species and communities. However, the dynamics that underlie the emergence of disease outbreaks in marine ecosystems still lack the equivalent level of ...
Experimental Study of the Response of Efficient Lighting Technologies to Complex Voltage Fluctuations
(Elsevier, 2014-07-09)
The replacement of incandescent lamps with more energy-efficient lighting technologies has a direct influence on the way flicker is measured. The International Electrotechnical Commission (IEC) established in the 61000-4-15 ...
Cyclotryptophan Mycotoxins: Short Synthesis of the Desymmetrized meso-Chimonantine Core of Leptosin C
(Georg Thieme, 2016-12-01)
The desymmetrized meso-chimonantine core of leptosin C was prepared in a short stereoselective convergent sequence in 5 steps as the longest linear path from methyl l-tryptophan hydrochloride as starting material. The key ...
The role of the design and operation of individual heating systems for the energy retrofits of residential buildings
(Elsevier, 2016-10-15)
he feasibility of individual natural gas fired boiler-based heating systems in the retrofitting of buildings constructed in the 50–60 s in Bilbao (northern Spain) is evaluated in this paper. A holistic approach through ...
Integrating stakeholders’ demands and scientific knowledge on ecosystem services in landscape planning
(Springer, 2014-02-07)
The conflict between conservation and timber production is shifting in regions such as Biscay (Basque Country, northern Spain) where planted forests are no longer profitable without public subsidies and environmentalist ...
Desarrollo de nuevas ideas de negocio mediante el aprendizaje activo
(Universidad del Zulia: Facultad Experimental de Ciencias, 2015-10-22)
[ES] El objetivo de este artículo es presentar las ventajas que ofrecen las metodologías activas de enseñanza frente a las tradicionales. En concreto, se plantea una experiencia de aprendizaje activo en la que los estudiantes ...
Las redes sociales como fuentes de información para ampliar la agenda temática de los cibermedios
(Universidad Miguel Hernández, 2020-07-31)
Las redes sociales son un caladero de información de fácil
acceso. Este trabajo examina el impacto de las redes sociales en el
contenido y en las fuentes de información de 20 Minutos, el primer
diario en España que ...
Control strategy optimization of a Stirling based residential hybrid system through multi-objective optimization
(Elsevier, 2020-02-20)
Hybrid systems for space heating and Domestic Hot Water (DHW) production are an attractive option for buildings to decrease their CO2 emissions. In this research, the operation variables of an installation, composed of a ...