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125 results on '"Giachi G."'

12. Updates on the PeNCIL project

Author

Pancrazzi, M., Landini, F., Baccani, C., Romoli, M., Noce, V., Focardi, M., Casini, C., Dinescu, A., Adam, G., Scippa, A., Giachi, G., Beier, M., and Publica

Abstract

By comparing measured and expected polarization in the HI Lyα 121.6 nm coronal emission line it is possible to infer the magnetic field in the solar corona. PeNCIL is the ideal device to perform such a measurement. It is a light transmitting polarimeter optimized at 121.6 nm, completely free of mechanical moving parts, thought as part of an internally occulted coronagraph to be flown aboard a future small solar mission. Its optical components are in de Senarmont configuration: a fixed MgF2 quarter wave retarder, a nano-wire grid polarizer (nano-WGP) and a MgF2 variable retarder modulated through a calibrated piezo-clamp (PCVR). The nano-WGP and the PCVR represent a first-ever achievement in the history of technology development for VUV. The nano-WGP fabrication is at the edge of the current nanotechnology since the pitch between wires shall be 40 nm. The PCVR is based on a MgF2 parallelepipedic sample refractive index variations as produced by a piezo-electric clamp. This work addresses the status of the project with particular emphasis on the design and manufacturing of the nano-WGP and the PCVR.

Published
2019

14. Men and elephants at Poggetti Vecchi (Grosseto)

Author

Aranguren B. M., Amico N., Benvenuti M., Capalbo C., Cavanna F., Cavulli F., Ciani F., Comencini G., D’amico C., Delfino M., Esu D., Giachi G., Giuliani C., Gliozzi E., Grandinetti G., Grimaldi S., Macchioni N., Mariotti Lippi M., Masini F., Mazza P., Mori M., Pallecchi P., Revedin A., Santaniello F., Savorelli A., Spadi M., Voltaggio M., Fabio Negrino, Aranguren, B. M., Amico, N., Benvenuti, M., Capalbo, C., Cavanna, F., Cavulli, F., Ciani, F., Comencini, G., D’Amico, C., Delfino, M., Esu, D., Giachi, G., Giuliani, C., Gliozzi, E., Grandinetti, G., Grimaldi, S., Macchioni, N., Mariotti Lippi, M., Masini, F., Mazza, P., Mori, M., Pallecchi, P., Revedin, A., Santaniello, F., Savorelli, A., Spadi, M., and Voltaggio, M.

Published
2016

15. Consideration on Polychromy from a group of nenfro sarcophagi at the Archaeological Museum in Florence, from Gens Statlane Tomb in Tuscania (Viterbo)

Author

Bracci, S, Giachi, G, Liverani, P, Pallecchi, P, Paolucci, F, Noferi, Claudia, Bracci, Susanna, Iannaccone, Roberta, Lenzi, Sara, Magrini, Donata, Sara Lenzi (ORCID:0000-0003-4057-3631), Bracci, S, Giachi, G, Liverani, P, Pallecchi, P, Paolucci, F, Noferi, Claudia, Bracci, Susanna, Iannaccone, Roberta, Lenzi, Sara, Magrini, Donata, and Sara Lenzi (ORCID:0000-0003-4057-3631)

Abstract

The paper shows the results of non-invasive analyses carried out on some Etruscan nenfro sarcophagi from Tuscania.

Published
2018

16. Colours in the dark: new research into catacombs

Author

Bracci, S, Giachi, G, Liverani, P, Pallecchi, P, Paolucci, F, Liverani, Paolo, Bracci, Susanna, Iannaccone, Roberta, Lenzi, Sara, Magrini, Donata, Mazzei, Barbara, Sara Lenzi (ORCID:0000-0003-4057-3631), Bracci, S, Giachi, G, Liverani, P, Pallecchi, P, Paolucci, F, Liverani, Paolo, Bracci, Susanna, Iannaccone, Roberta, Lenzi, Sara, Magrini, Donata, Mazzei, Barbara, and Sara Lenzi (ORCID:0000-0003-4057-3631)

Abstract

The paper shows the results of the non-invasive analyses carried out on the polychromy of some Roman sarcophagi in Saint Pamphilus catacomb, Saint Mark, Marcellian and Damasus catacombs and Via Anapo catacomb.

Published
2018

20. Consolidation of waterlogged woods by in-situ polymerisation of isoeugenol

Author

ORLANDI M, GIACHI G, Tolppa E, L. Zoia, AGOZZINO, Pasquale, DONATO, Dorina Ines, Joyce H. Townsend, Lucia Toniolo, Francesca Cappitelli, ORLANDI M, AGOZZINO P, DONATO DI, GIACHI G, Tolppa E, and L Zoia

Subjects
Waterlogged wood, isoeugenol, salen, in situ polymerisation, consolidation
Published
2008

22. Archaeobotanical analysis of a Bronze Age well from Sardinia: A wealth of knowledge

Author

Ucchesu, Mariano [0000-0002-1587-9842], Peña-Chocarro, Leonor [0000-0002-7807-8778], Sabato, Diego, Masi, A., Pepe, Caterina, Ucchesu, Mariano, Peña-Chocarro, Leonor, Usai, A., Giachi, G., Capretti, C., Bacchetta, Gianluigi, Ucchesu, Mariano [0000-0002-1587-9842], Peña-Chocarro, Leonor [0000-0002-7807-8778], Sabato, Diego, Masi, A., Pepe, Caterina, Ucchesu, Mariano, Peña-Chocarro, Leonor, Usai, A., Giachi, G., Capretti, C., and Bacchetta, Gianluigi

Abstract

In 2008, during a rescue excavation in the Sa Osa area, near the town of Cabras (Sardinia, Italy), a Nuragic settlement was discovered. The excavation revealed numerous pits, wells and structures dug by the local communities between the Early Copper Age and the Iron Age. These structures were interpreted as elements of a settlement mainly involved in primary production. The most remarkable structure is Well-N, radiocarbon and archaeologically dated to the Late Bronze Age, which has yielded large amounts of waterlogged plant remains, animal and fish bones and pottery. Despite the limited set of samples, the combination of macro-remain and pollen analyses in this unique context provides important information useful for exploring not only local subsistence systems but also human impact on the surrounding environment. Grapes and figs are the most abundant remains together with other fruits and edible vascular plants. Remains of melon and mulberry were identified being the earliest remains of these two species for Western Europe. Their presence may confirm early trade between Nuragic people and the eastern Mediterranean and/or African coasts. Intentional selection of wood suggests practices associated to the collection of raw material for specific technological demands. The presence of intestinal parasites in the pollen record points to the possible use of the well as a cesspit, at least in its later use, and this is one of the earliest evidence of this type of structures in prehistoric contexts.

Published
2015

28. Characterization of waterlogged wood by infrared spectroscopy

Author

Pizzo B., Alves A., Macchioni N., Giachi G., Schwanninger M., and Rodrigues J.

Abstract

The work concerns the characterisation of waterlogged archaeological wood samples from different excavation sites in Italy by means of infrared spectroscopy. It describes some preliminary evaluations of the analyses carried out, including a quantitative estimation of the holocellulose, one of the structural chemical components constituting the cell walls.

Published
2010

40. La tecnica pittorica

Author

Giachi, G., Pallecchi, P., maria perla colombini, FRANCESCA MODUGNO, Zoppi, A., and Castellucci, E. M.

Published
2007

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