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ULTIME NOTIZIE IN RETE
Dare sempre meno e pretendere sempre di più: questa la via per l'inclusione scolastica?
inviato da Daniele Lo Vetere - Come insegnante, in questi anni, mi sono occupato sia delle mie discipline, sia di sostegno e italiano L2. Parliamo chiaro: tutti sappiamo che capita frequentemente che l'insegnante di sostegno (o quei rari e non istituzionalizzati casi di insegnante di L2) siano considerati dall'insegnante curricolare come colui o colei cui affidare il caso scabroso, per non doverci più pensare. leggi tutto
DeWayne Wickham, USA Today Never lacking chutzpah, Sen. Mitch McConnell, R-Ky., the Chief Obstructionist of the Party of No, turned up on Meet the Press Sunday to denounce the Obama administration for creating "a culture of intimidation" that led the IRS to target conservative, non-profit groups for special scrutiny.His suggestion, that the president was behind the tax agency's alleged misbehavior, was strong; his evidence to support this insinuation was weak. McConnell, the Senate Republican leader, claims the Obama administration has created a "nanny state" that tells Americans what to do --...
“Prominently displayed on my writing desk is an index card on which I’ve written a quote by my dear friend, and boss at the Nervous Breakdown , Brad Listi. Some years ago, when I was at a creative low point—allowing the criticism of others to question my abilities as a writer—Brad told me: rich_ferguson.jpg Publish Date: May 21, 2013 - 8:00pm read more
UNA OFERTA DE LOCOS. No deja de ser una paradoja que el futbolista que más le ha dado al Barça a lo largo de su historia es el que menos le ha costado. Tanto como nada. Solo su formación en la cantera barcelonista. Y todo lo que ha ganado Leo como pr... leer la noticia completa
NOTICIAS... Me alegro de que Abidal y el Barça hayan llegado a un acuerdo amistoso y la próxima semana el mundo entero pueda ver la foto del abrazo del jugador con el presidente Rosell. Es de justicia que Abi salga del Barça por la puerta grande y, l... leer la noticia completa
Prospection and Monitoring of the Archaeological Heritage of Nasca, Peru, with ENVISAT ASAR
The processing method based on synthetic aperture radar (SAR) amplitude information presented by Cigna et al. (2013, this issue) was used to extract the backscattering coefficient (σ0) from ENVISAT advanced SAR (ASAR) scenes to investigate the archaeological heritage of the Nasca region, southern Peru. Average backscattering and σ0 time series in 2003–2007 were obtained for some of the most famous groups of the Nazca Lines, as well as for the adobe structures of the Ceremonial Centre of Cahuachi, and allowed the recognition of anthropogenic features on arid and bare soil. Despite the expected constraints due to the medium spatial resolution of the ASAR scenes (~30 m), some features related to the Nasca ancient aqueduct systems (puquios) were detected, and water level changes were inferred from amplitude change detection maps and σ0 time series. The SAR-based prospection results were also compared with a vegetation index derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data for 2003, 2004 and 2007. The changes observed over Cahuachi and the neighbouring archaeological mounds are then discussed in light of the recent conservation history of the site and the contemporary archaeological excavations. The research opens interesting perspectives for routine use of SAR data for purposes of archaeological prospection and condition monitoring in (semi-)arid and desert regions. Copyright © 2013 John Wiley & Sons, Ltd.
Amplitude Change Detection with ENVISAT ASAR to Image the Cultural Landscape of the Nasca Region, Peru
Synthetic aperture radar (SAR) amplitude information from ENVISAT C-band advanced SAR (ASAR) data was used to analyse the cultural landscape of the Nasca region, southern Peru. A multispatial environmental analysis was performed over the whole drainage basin of the Rio Grande, by extracting the radar backscattering coefficient (σ0) of both natural and anthropogenic features between 2003 and 2005. Co-registration of the ASAR scenes to a single master resulted in precisions of less than 0.1 pixels along both the range and azimuth directions. Four different products were generated based on the co-registered ASAR stack: (i) temporally averaged radar signatures of the targets between 2003 and 2005; (ii) time series of spatially averaged radar signatures within selected areas of interest; (iii) amplitude change detection products based on (iii) image ratios and (iv) RGB colour composites between different scenes. Comparisons of annual and seasonal records through amplitude change detection maps highlighted σ0 changes over the floodplains of the Rio Ingenio and Rio Nazca, which correlate well with evidence from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data acquired in 2003, 2004 and 2007. Inferences about land use and soil conditions were retrieved from the σ0 change patterns, thereby proving the capability of this approach to support landscape evolution studies, even with SAR imagery of medium resolution (~30 m). Our results also demonstrated actual potential for monitoring mass movements and land surface processes, to assess the susceptibility of archaeological heritage and cultural landscape to natural hazards. Copyright © 2013 John Wiley & Sons, Ltd.
( Woods Hole Oceanographic Institution ) Using a "patient monitoring" device attached to a whale entangled in fishing gear, scientists showed for the first time how fishing lines changed a whale's diving and swimming behavior. The monitoring revealed how fishing gear hinders whales' ability to eat and migrate, depletes their energy as they drag gear for months or years, and can result in a slow death.
( USDA Forest Service - Pacific Northwest Research Station ) The concept of "place" is increasingly being considered in the management of natural resources, and practitioners now have a new resource that can help them recognize and respond to the relationships people have with the places in their lives.
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