1,721,232 research outputs found
Six sonates pour le clavecin où le piano forte par Piozzi. Oeuvre IIe
No full textTitre uniforme : Piozzi, Gabriele Mario (1740-1809). Compositeur. [6 sonates. Clavecin ou piano forte, violon. Op. 2]Présentation musicale : [Partie]Appartient à l’ensemble documentaire : RISM2Appartient à l’ensemble documentaire : RISMImpSonates (violon et instrument à clavier) -- +* 1700......- 1799......+:18e siècle
Three amulets in papyrus and linen from the Rijksmuseum van Oudheden, Leiden
No full textAmong the papyri acquired by the Rijksmuseum van Oudheden from the collector Giovanni d’Anastasi in 1828, there are some interesting amuletic papyri. Three of them have not been published until now: two amuletic papyri, AMS 59d (pLeiden I 359) and AMS 59b (pLeiden I 357), and a linen amulet, AMS 59a (Leiden I 356). The three amulets present several differences: AMS 59a is quite long and extensively decorated, as the amuletic papyri of the Late Period; on the contrary, AMS 59b is very simple and bears only one image; AMS 59d presents some images that can be interpreted in the context of the exorcistic practice related to the goddess Sekhmet and her demons. These amulets show many similarities with other amulets from the Late and Ptolemaic Period, being good representatives of the magical practice of the period. The images are based both on the iconographic repertoire typical of this kind of objects and on the innovations introduced during the Late Period. Given also their excellent state of preservation, the objects are an interesting addition to the group of the already known amuletic papyri
I CONTENZIOSI MEDICO-LEGALI IN CHIRURGIA ODONTOSTOMATOLOGICA. NOTA 1: DIAGNOSI E SCELTA DEL TRATTAMENTO
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Two "amuletic formulas" against demons: The Hr wAD sxm.t and sA HA sA formulas
No full textThe formulas 1r sp-sn wAD 4xm.t HA iwf NN tm n anx and sA HA sA ii sA are two recognizable parts of several ancient Egyptian magical texts, mainly spells against demons and ghosts. They usually recur at the end of the spell, almost like a ritual refrain. Their existence spans from the Middle Kingdom to the Graeco-Roman Period, with minimal changes. The formula 1r wAD 4xm.t aims to protect the person specifically from demons related to the goddess Sekhmet, while the formula sA HA sA is the evolution of an expression of protection already present in the Middle Kingdom Apotropaia. The two formulas present several common aspects that help identify them as “amuletic formulas”, that is to say, written formulas that stand for amulets through the emblematic value of hieroglyphic writing. The present paper aims at analysing the multi-layered nature of these formulas, whose words refer to complex religious and symbolic meanings that are conveyed and objectified by the written word
Il rapporto tra gli ḫȝ.tyw e le sette frecce nella demonologia egiziana
No full textDemonology is still a fairly unexplored field as part of the Ancient Egyptian religion studies. The issue has so far been limited to brief articles and essays, which do not allow to establish a methodology and solid criterions to deal with the subject. This is particularly evident in the absence of a chronological and diachronic perspective in the demonological analysis. Egyptian ideas about supernatural beings have been considered as an immutable whole, without any inner development or evolution: entities far apart in time and belonging to different cultural contexts have been placed on the same level. This article aims to analyze the ambiguity caused by considering as identical two different categories of demons, the ḫ3.tyw and the “seven arrows”. Through a contextualized analysis of the sources, the article will show that these two types have different chronological, cultic and iconographic features. The proposed elements will make clear that the assumption ḫ3.tyw = “seven arrows” is valid only in specific circumstances
Water, protection and destiny: an interpretation of the wr.t-demon
No full textThe wr.t is an entity that recurs several times in the corpus of the Oracular Amuletic Decrees and until now has eluded every attempt of identification. The first translator of the OAD, Edwards, conceived them as ʻelves, mischievous demons who lay in wait for the unwaryʼ. This explanation rests on the fact that in the majority of cases the Decrees describe the wr.t as a creature belonging to the natural landscape, particularly streams and stretches of water. However, the OAD also contains wr.t of the sky, the Underworld, and even of persons. Given that an interpretation as generic spirits of the natural world is unsatisfactory, my research aims to shed light on the nature of these mysterious entities. First, I will extend the analysis to other sources mentioning the wr.t: ostraca and stela from Deir el-Medina (where wr.t appears to be an entity belonging to a person) and demotic texts (where wr.t has become an entirely evil entity, equated in the horoscopes to the Greek ʻhouse of the bad luckʼ and opposed to the benevolent SpSy). Secondly, through comparison with the Sps.wt, I will analyse the wr.t as a protective hippopotamus-deity, related to the destiny of the person and to the flow of time. The connection with the Goddess of the Eye and the astronomical conceptions of the Third Intermediate Period will offer elements to understand the negative evolution of these entities in the OAD. Finally, I will address the problem of the aquatic nature of the wr.t
Tactile sensing-based algorithms for perception of unknown objects
No full textDeveloping robotic platforms capable of accurately, reliably, and safely manipulating objects
requires equipping robots with a deep understanding of object perception. Humans integrate
tactile feedback and vision to have a more comprehensive understanding of objects. However,
in some occasions they need to rely on touch solely. To achieve human-like perception and
manipulation, robots must also handle unknown objects and interpret both dynamic and static
characteristics. To simultaneously perceive the diverse properties of real-world objects, such
as shape, texture, real-time contact force, and 6D pose, robots require a level of sensory
integration that traditional approaches typically lack. This Thesis primarily focuses on tactile
sensing to enable robots to perceive and manipulate unknown objects in varied, real-world
environments, and it explores how to integrate other modalities like proprioception to further
enhance perception. While much research in this area addresses known or specific categories
of objects, this work generalizes tactile perception to unseen objects and across various plat-
forms, emphasizing object-agnostic characteristics. By using machine learning techniques,
deep neural networks, classical control theory, and optimization methods, this thesis develops
algorithms and methods to enhance robots’ object perception and manipulation capabilities.
The proposed approaches rely on vision-based tactile sensors, which use a camera to capture
elastomer deformations and produce RGB images. This characteristic enables the employ-
ment of advanced deep learning techniques originally developed for visual data. The findings
of this research allow robots to classify local surfaces, adapt tactile data from simulations to
real-world tasks without loss of performance, estimate 6D object poses, predict 3D contact
forces from tactile data, and perform fine-grained manipulation tasks such as key insertion,
all using the same sensor technology. These methods, tested across diverse sensors and
environments, empower robots to perceive object characteristics in real time and manipulate
them more effectively. The results reveal that tactile sensing can significantly enhance robots
perception and manipulation capabilities, enabling lightweight, fast methods suitable for
real-time use. The proposed multisensory integrations broaden the potential applications of
tactile-enabled robots in fields requiring robust touch-based perception, including automated
assembly, healthcare, and service robotics. By advancing tactile sensing generalization and
multimodality across diverse objects and environments, this research lays a foundation for
autonomous robotic systems with intuitive, resilient perception and manipulation capabilities
akin to those of humans. All findings and methods are open-source, with the goal of creating
a multi-sensory library readily accessible to the community, fostering future research and
collaboration
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