843 resultados para 1536
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This issue's Works-In-Progress department has four entries related to the issue's theme, Information and Communication Technologies for Development (ICTD). They are “Sustainable ICT in Agricultural Value Chains”, “Measuring Social Inclusion in Primary Schools”, “An Architecture for Green Mobile Computation”, and “Improving Communication in Resource-Poor Settings”. A fifth entry, “mFeel: An Affective Mobile System”, covers the mFeel mobile system, which combines context awareness with affective and cognitive techniques.
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Capitulares grab. xil.
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Pie de imp. tomado del colofón, en I6r
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El pie de imp. tomado del colofón
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Lugar e imp. tomados del colofón
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Sign: a-z8, [et]8, A-T8, U4
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Texto a dos col. con apostillas marginales
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Pie de imp. tomado de colofón
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In this letter, a dual circular polarized steering antenna for satellite communications in X-band is presented. This antenna consists of printed elements grouped in an array, able to work from 7.25 up to 8.4 GHz in both polarizations: left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP). The module antenna is compact, with narrow beamwidth, and reaches a gain of 16 dBi. It has the capability to steer in elevation to and electronically with a Butler matrix. In order to reduce the mutual coupling between adjacent patches, electromagnetic band-gap (EBG) structures are introduced. These EBGs combine double-layer and edge location via in order to reduce the size, without changing the low-permittivity substrate, and therefore maintaining the high radiation efficiency of the antenna.
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Sign.: a-z8, [et] 8, [cum]8, [rum]8, A-I8, K4
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Texto fechado en Lovaina, 1520, tomado de O5v
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Sign.: 2A8, 2B4, a-z8, A-K8
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Sign.: 2A8, 2B4, a-z8, A-K8
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Erasmus, Desiderius, m. 1536. Exomologesis siue modus confitendi. Basileae : apud Ioannem Frob., 1524. [72] h. : il. Sign.: A-I8
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