Registro automático de imágenes de bandas espectrales alejadas

Se presentan nuevos métodos para el registro de imágenes de bandas espectrales alejadas. El conjunto de transofrmaciones candidatas para el registro de las imágenes se determina mediante el casamiento de estructuras formadas por segmentos lineales rectos detectados en los bordes extraídos de las imágenes. Posteriormente se define un criterio para obtener la transformación de registro óptima del conjunto de trasnformaciones candidatas. Se presenta también dos métodos diferents para la evaluación de los procedimientos de registro desarrollados. El primero se basa en la descomposición de Gabor, y el segundo en la determinación del campo vectorial de desplazamientos locales asociados al desregistro. Finalmente se describen y analizan los resultados de la aplicación de los métodos de registro a varios tipos de imágenes (en particular, visible-visible, visible-IR y visibles-SAR), y se presentan otras posibles aplciaciones.Depto. de ÓpticaFac. de Ciencias FísicasTRUEpu

Approaches to Automatic Seabed Classification

Non

Uncles ex Machina: Familial Epiphany in Euripides' Electra

At the close of Euripides’ Electra, the Dioscuri suddenly appear ‘on high’ to their distraught niece and nephew, who have just killed their mother, the divine twins’ mortal sister. This is in fact the second longest extant deus ex machina (after the final scene in Hippolytus), and the only scene in which a tragedian attempts to resolve directly the aftermath of the matricide. In this article, I argue that Castor's and Polydeuces’ sudden apparition to Orestes and Electra constitutes a specialised point of intersection between the mortal and immortal realms in Greek tragedy: familial epiphany, an appearance by a god who has an especially intimate relationship with those on stage. Euripides’ focus on the familial divine as a category accentuates various contradictions inherent to both ancient Greek theology and dramaturgy. The Dioscuri are a living paradox, ambiguously traversing the space between dead heroes and gods, managing at the same time to occupy both. They oscillate uniquely between the mortal and immortal worlds, as different sources assign different fathers to each brother, and others speak of each one possessing divinity on alternate days. As I propose, the epiphany of these ambiguous brothers crystallises the problem of the gods’ physical presence in drama. Tragedy is the arena in which gods burst suddenly into the mortal realm, decisively and irrevocably altering human action. The physical divine thus tends to be both marginal and directorial, tasked with reining in the plot or directing its future course. The appearance of the familial divine, on the other hand, can in fact obscure the resolution and future direction of a play, undermining the authority of the tragic gods. In the specific case of Electra, I contend that the involvement of the Dioscuri, who are Electra's and Orestes’ maternal uncles, produces a sense of claustrophobia at the close of the play, which simultaneously denies the resolution that is expected from a deus ex machina while also revealing the pessimistic nature of what is typically considered a reassuringly ‘domestic’ and character driven drama

Intracellular expression of Tat alters mitochondrial functions in T cells: a potential mechanism to understand mitochondrial damage during HIV-1 replication

HIV-1 replication results in mitochondrial damage that is enhanced during antiretroviral therapy (ART). The onset of HIV-1 replication is regulated by viral protein Tat, a 101-residue protein codified by two exons that elongates viral transcripts. Although the first exon of Tat (aa 1–72) forms itself an active protein, the presence of the second exon (aa 73–101) results in a more competent transcriptional protein with additional functions. Results: Mitochondrial overall functions were analyzed in Jurkat cells stably expressing full-length Tat (Tat101) or one-exon Tat (Tat72). Representative results were confirmed in PBLs transiently expressing Tat101 and in HIV-infected Jurkat cells. The intracellular expression of Tat101 induced the deregulation of metabolism and cytoskeletal proteins which remodeled the function and distribution of mitochondria. Tat101 reduced the transcription of the mtDNA, resulting in low ATP production. The total amount of mitochondria increased likely to counteract their functional impairment. These effects were enhanced when Tat second exon was expressed. Conclusions: Intracellular Tat altered mtDNA transcription, mitochondrial content and distribution in CD4+ T cells. The importance of Tat second exon in non-transcriptional functions was confirmed. Tat101 may be responsible for mitochondrial dysfunctions found in HIV-1 infected patients.We greatly appreciate the secretarial assistance of Mrs Olga Palao. This work was supported by FIPSE (360924/10), Spanish Ministry of Economy and Competitiveness (SAF2010-18388), Spanish Ministry of Health (EC11- 285), AIDS Network ISCIII-RETIC (RD12/0017/0015), Instituto de Salud Carlos III, Spanish Ministry of Economy and Competitiveness (FIS PI12/00506). The work of Sara Rodríguez-Mora is supported by a fellowship of Sara Borrell from Spanish Ministry of Economy and Competitiveness (2013). The work of María Rosa López-Huertas is supported by a fellowship of the European Union Programme Health 2009 (CHAARM).S

Registro automático de imágenes de bandas espectrales alejadas

Se presentan nuevos métodos para el registro de imágenes de bandas espectrales alejadas. El conjunto de transofrmaciones candidatas para el registro de las imágenes se determina mediante el casamiento de estructuras formadas por segmentos lineales rectos detectados en los bordes extraídos de las imágenes. Posteriormente se define un criterio para obtener la transformación de registro óptima del conjunto de trasnformaciones candidatas. Se presenta también dos métodos diferents para la evaluación de los procedimientos de registro desarrollados. El primero se basa en la descomposición de Gabor, y el segundo en la determinación del campo vectorial de desplazamientos locales asociados al desregistro. Finalmente se describen y analizan los resultados de la aplicación de los métodos de registro a varios tipos de imágenes (en particular, visible-visible, visible-IR y visibles-SAR), y se presentan otras posibles aplciaciones