Narcissus and the moon:Parallax in early modern images

This essay develops a comprehensive approach to the study of parallax effects in early modern images, with critical emphasis on painting. Parallax is the apparent displacement of an object relative to a given background, as caused by the movement of the observer. In the cosmological debate that accompanied the Copernican revolution, the apparent absence of stellar parallax was taken as decisive evidence against the hypothesis of the motion of the Earth. Surprisingly, the emergence of a parallax view in the early modern arts has not been considered in relation to this crucial scientific debate, and it is still largely understudied. In this context, this essay puts forward a twofold argument: first, it contends that the debate on stellar parallax informs, integrates, and transforms the theory of perspective in the late Renaissance; second, it argues that the parallax view sheds new light on the representation of movement in the Baroque visual culture. The semiotic model of uttered enunciation provides a methodological framework to study the inscription of a moving observer in images, and the question of the semiotic nature of mirrors finds here a new pertinence. This framework is developed with a focus on Giordano Bruno’s art of memory, where the parallax view enables a semiotic embrace of the movement of images. In painting, analysis focuses on Caravaggio’s Narcissus, where the observer is displaced to reflect the point of view of an image that appears motionless but sees itself as a moving image

Contemporary Seicento:On the Dark Background of the Italian Historical Novel

While the historical novel is a product of European Romanticism, the first Italian historical novel expresses the critical awareness of its origin against the dark background of the Seicento. For the historical and political imagination of the Italian Romanticism, the Seicento represents the Middle Age of modernity, namely the obscurity of the contemporary. From the dark background of the Seicento the Italian historical novel draws stories that reflect on the obscurity of its own time. In particular, my essay examines a selection of contemporary texts that show the continued and critical presence of the Seicento in the Italian historical novel

Combining EfficientNet and Vision Transformers for Video Deepfake Detection

Deepfakes are the result of digital manipulation to obtain credible videos in order to deceive the viewer. This is done through deep learning techniques based on autoencoders or GANs that become more accessible and accurate year after year, resulting in fake videos that are very difficult to distinguish from real ones. Traditionally, CNN networks have been used to perform deepfake detection, with the best results obtained using methods based on EfficientNet B7. In this study, we combine various types of Vision Transformers with a convolutional EfficientNet B0 used as a feature extractor, obtaining comparable results with some very recent methods that use Vision Transformers. Differently from the state-of-the-art approaches, we use neither distillation nor ensemble methods. The best model achieved an AUC of 0.951 and an F1 score of 88.0%, very close to the state-of-the-art on the DeepFake Detection Challenge (DFDC)

Effectiveness of near-UVA in SARS-CoV-2 inactivation

This experimental study aimed to determine the activity of a near-UVA (405 nm) LED ceiling system against the SARS-CoV-2 virus. The ceiling system comprised 17 near-UVA LED lights with a radiant power of 1.1 W/each centred at 405 nm wavelength. A 96-multiwell plate, fixed to a wooden base, was inoculated with suspensions of VERO E6 cell cultures infected with SARS-CoV-2 virus and irradiated at a distance of 40 cm with a dose of 20.2 J/cm(2) for 120 min. The collected suspensions were transferred to VERO cell culture plates and incubated for 3 days. The maximum measurable log reduction obtained, starting from a concentration of 10(7.2) TCID50/mL, was 3.0 log(10) and indicated inhibition of SARS-CoV-2 replication by the near-UVA LED ceiling system. Near-UVA light at a 405-nm wavelength is emerging as a potential alternative treatment for localised infections and environmental decontamination because it is far less harmful to living organisms' cells than UV-C irradiation