101,876 research outputs found
In situ conservation by cathodic protection of cast iron findings in marine environment
No full textNine cast iron cannons, dated between 17th and 18th century, were discovered in 2000 on the sea floor offshore
the coast of the Marettimo Island (Sicily), scattered in an area of about 1200 square meters. The findings were
left on the seabed, in the original place of their discovery, and a project for a marine archaeological park open
to selected visitors was initiated by the Soprintendenza del Mare in collaboration with the Central Institute of
Restoration. A comprehensive conservation plan was discussed among marine archeologists, conservators and
materials engineers, aimed to identify efficient and non-invasive protection systems for the submerged cast iron
objects. Cathodic protection was selected as the most interesting and promising conservation technique.
Electrical protection of submerged steel components is a common practice for industrial or civil structures, that
can be efficiently preserved circulating an external cathodic current on their surface using sacrificial anodes. In
the case of components of artistic or historic relevance, particular care must be taken to guarantee the lowest
impact on the object. Preliminary investigations concerning the materials and their conservation state
(graphitization and corrosion potential), the position of the objects on the marine floor and the characteristics
(temperature, pH, dissolved oxygen) of the environment were necessary. Zinc anodes were dimensioned and
connected to the cannons by an original mounting structure
Le attività del progetto Archeologia e ambiente delle “ isole di storia” del Tirreno: il caso di Ischia: la campagna 2022
No full textTra mille punte di diamanti. L'analisi dell'apparato decorativo scultoreo per una nuova proposta di datazione
No full textUn'analisi comparativa dell'apparato decorativo scultoreo della chiesa di Santa Maria della Giustizia a Taranto permette una nuova e più circostanziata proposta cronologica relativa al suo momento di esecuzione primigenia. Si mettono in fila, inoltre, alcune questioni legate alla circolazione delle maestranze nella Puglia angioina e all'utilizzo di patterns decorativi in relazione a determinate mode di cantiere, dettate da rapporti di dipendenza da contesti più o meno prestigiosi rintracciabili nel medesimo comparto regionale
La decorazione pittorica di età medievale: alcune note
No full textSi analizza la decorazione pittorica superstite della chiesa di Santa Maria della Giustizia a Taranto e del suo refettorio abbaziale. Il caso diventa un pretesto per allargare l'indagine ad altre testimonianze coeve e rintracciabili nel medesimo ambito regionale, che possono essere messe in relazione alle prime per ragioni formali o tipologiche. Si riflette brevemente sul tema delle lunette affrescate nella Puglia angioina
LASER SCANNER RELIEFS OF SELECTED ARCHEOLOGICAL STRUCTURES IN THE SUBMERGED BAIAE (NAPLES)
No full textIn 2011 the ISCR (Rome), in the frame of the Project Restoring Underwater directed by Barbara Davidde Petriaggi, started to test Naumacos Laser Scann 1, designed by Gabriele Gomez de Ayala, in order to document the restoration of a room paved with opus sectile probably part of the Bath of Punta Epitaffio (Underwater Park of Baiae – Marine Protected Area, Naples).
The experimentation conducted in Baiae by ISCR has shown the effectiveness of the Laser Scanner; this method also allowed to considerably reduce times and costs of underwater surveying. Moreover, the 3D relief obtained, has the characteristic of being geometrically (accuracy is sub-millimetric) and chromatically faithful to the reconstructed structure, as well as being exportable in various forms and usable in several contexts. From 2011 to 2013 the evolution of the instrument Naumacos Laser Scanner 3 was developed and tested in the restoration work of the Villa con ingresso a protiro, where three structures were documented in 3D (a paved with black and white mosaic decorated with hexagons and peltae, a very fragmentary black and white mosaic and a stone artefact. This paper shows the results of this documentation campaign and it underlines the prominent role in documentation and in museum display of Underwater Cultural Heritage played by the three-dimensional laser scanning survey. This technique also contributes to the increase of the value of scientific dissemination
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
The Right to Strike under the United States Constitution: Theory, Practice, and Possible Implications for Canada
No full textAnswering critics of the Canadian Supreme Court's judgment in B.C. Health, the author argues that the Court laid the foundation for a principled and durable doctrine protecting constitutional labour rights, one that goes directly to the heart of the matter — the inequality of workers’ power in the employment relation. In the author’s view, two paths could lead from B.C. Health to the recognition of Charter protec- tion for a right to strike: one that treats the right as an accessory to col- lective bargaining, and one that upholds the right directly on the basis of the Charter values of equality and participation. The author supports the latter approach, contending that constitutional rights should be defined in relation to fundamental values, in a way that is not contingent on time-bound or fact-sensitive assessments about the role of strikes within a particular collective bargaining regime. Although a Charter right to strike may involve the courts in difficult choices about when to defer to legislative policy decisions, and courts may lack the institutional capac- ity to deal effectively with labour law issues, the author points out that judges can look to ILO standards for expert guidance. Noting that the U.S. experience in this area might be of considerable use to Canadians, the author concludes by providing an overview of American case law concerning a constitutional right to strike.Peer reviewe
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