Francesco D'Agostino | Università di Roma Tor Vergata (original) (raw)
Uploads
Papers by Francesco D'Agostino
Acta bioethica, 2002
Este texto propone una serie de observaciones y argumentos que permiten situar adecuadamente el d... more Este texto propone una serie de observaciones y argumentos que permiten situar adecuadamente el desafío planteado por la bioética al derecho. El modelo de Kelsen, consistente en identificar los desafíos de la bioética como simples problemas de contenido de normas, es postulado como limitado y reduccionista respecto de las temáticas substanciales que la bioética plantea. El camino propuesto por el autor para evitar convertir la ciencia jurídica en una simple técnica, consistiría en lograr que aquélla reasuma su específica validez antropológica, lo que la alejaría de toda tentación de estéril formalismo, obligándola a trabajar en la perspectiva de las estructuras que caracterizan el ser del hombre, dado que la bioética plantea problemas antropológicos generales, esto es, de estructura.
Progress In Electromagnetics Research B, 2009
The unified theory of near-field-far-field transformations with spiral scannings for quasi-spheri... more The unified theory of near-field-far-field transformations with spiral scannings for quasi-spherical antennas is extended in this paper to the case of nonspherical ones, i.e., antennas with two dimensions very different from the third one. To this end, these antennas are no longer considered as enclosed in a sphere, but in a proper convex domain bounded by a rotational surface. The extension, heuristically derived by paralleling the rigorous procedure valid for the spherical source modelling, allows one to overcome its main and serious drawbacks. In fact, the corresponding near-field-farfield transformations use a reduced number of near-field measurements and, above all, allow one to consider measurement surfaces at a distance smaller than one half the antenna maximum size, thus remarkably reducing the error related to the truncation of the scanning zone. These are very important features, which make the spiral scannings more and more appealing from the practical viewpoint. Some examples of the application of this theory to spirals wrapping the conventional scanning surfaces employed in the near-field-far-field transformations are reported, and the accuracy and robustness of the far-field reconstructions are assessed.
Progress In Electromagnetics Research B, 2010
Two different approaches for compensating the probe positioning errors in a near-field-far-field ... more Two different approaches for compensating the probe positioning errors in a near-field-far-field transformation with cylindrical scanning using a nonredundant number of measurements are presented and experimentally validated in this paper. In order to evaluate the uniformly distributed samples from the irregularly spaced ones, the former makes use of the singular value decomposition method, whereas the latter employs an iterative technique. In both the cases, the near-field data needed by a standard near-field-farfield transformation are efficiently evaluated via an optimal sampling interpolation algorithm.
![Research paper thumbnail of Non-Redundant Spherical NF - FF Transformations Using Ellipsoidal Antenna Modeling: Experimental Assessments [Measurements Corner]](https://attachments.academia-assets.com/71850053/thumbnails/1.jpg)
](IEEE Antennas and Propagation Magazine, 2000
A key concern in making near-fi eld antenna measure ments is measurement time, since most often t... more A key concern in making near-fi eld antenna measure ments is measurement time, since most often the use of near-fi eld processes entails stepping up to additional sampling. This month's Measurements Corner article features excellent antenna-measurement comparisons based on derived non-redundant minimum near-fi eld samples for two fundamentally different collection geometries.
Acta bioethica, 2002
Este texto propone una serie de observaciones y argumentos que permiten situar adecuadamente el d... more Este texto propone una serie de observaciones y argumentos que permiten situar adecuadamente el desafío planteado por la bioética al derecho. El modelo de Kelsen, consistente en identificar los desafíos de la bioética como simples problemas de contenido de normas, es postulado como limitado y reduccionista respecto de las temáticas substanciales que la bioética plantea. El camino propuesto por el autor para evitar convertir la ciencia jurídica en una simple técnica, consistiría en lograr que aquélla reasuma su específica validez antropológica, lo que la alejaría de toda tentación de estéril formalismo, obligándola a trabajar en la perspectiva de las estructuras que caracterizan el ser del hombre, dado que la bioética plantea problemas antropológicos generales, esto es, de estructura.
Progress In Electromagnetics Research B, 2009
The unified theory of near-field-far-field transformations with spiral scannings for quasi-spheri... more The unified theory of near-field-far-field transformations with spiral scannings for quasi-spherical antennas is extended in this paper to the case of nonspherical ones, i.e., antennas with two dimensions very different from the third one. To this end, these antennas are no longer considered as enclosed in a sphere, but in a proper convex domain bounded by a rotational surface. The extension, heuristically derived by paralleling the rigorous procedure valid for the spherical source modelling, allows one to overcome its main and serious drawbacks. In fact, the corresponding near-field-farfield transformations use a reduced number of near-field measurements and, above all, allow one to consider measurement surfaces at a distance smaller than one half the antenna maximum size, thus remarkably reducing the error related to the truncation of the scanning zone. These are very important features, which make the spiral scannings more and more appealing from the practical viewpoint. Some examples of the application of this theory to spirals wrapping the conventional scanning surfaces employed in the near-field-far-field transformations are reported, and the accuracy and robustness of the far-field reconstructions are assessed.
Progress In Electromagnetics Research B, 2010
Two different approaches for compensating the probe positioning errors in a near-field-far-field ... more Two different approaches for compensating the probe positioning errors in a near-field-far-field transformation with cylindrical scanning using a nonredundant number of measurements are presented and experimentally validated in this paper. In order to evaluate the uniformly distributed samples from the irregularly spaced ones, the former makes use of the singular value decomposition method, whereas the latter employs an iterative technique. In both the cases, the near-field data needed by a standard near-field-farfield transformation are efficiently evaluated via an optimal sampling interpolation algorithm.
IEEE Antennas and Propagation Magazine, 2000
A key concern in making near-fi eld antenna measure ments is measurement time, since most often t... more A key concern in making near-fi eld antenna measure ments is measurement time, since most often the use of near-fi eld processes entails stepping up to additional sampling. This month's Measurements Corner article features excellent antenna-measurement comparisons based on derived non-redundant minimum near-fi eld samples for two fundamentally different collection geometries.