Application of X-Ray Fluorescence Analysis in Investigations of Historical Monuments

Nuclear techniques and other techniques using ionising radiation represent a valuable tool in non-destructive diagnostics applied to archaeological finds and objects of arts, namely for determining the composition of materials used in the production of artefacts. X-ray fluorescence analysis, both in its energy form and in its wave dispersive form, is one of the most widespread methods using ionising radiation to study the elemental composition of materials. It is frequently used for studies of various cultural and historic relicts and objects of art. This work summarizes the authors’ experience with X-ray fluorescence analysis in investigating historical frescos namely by means of portable provide spectroscopic devices. The results of these measurements information on the composition of the pigments, enable the comparison of processes used in the fabrication of pigments by individual artists, and in many cases offer information on how to repair the damaged parts.

26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 - Meeting Abstracts - Antwerp, Belgium. 15–20 July 2017

This work was produced as part of the activities of FAPESP Research,\ud Disseminations and Innovation Center for Neuromathematics (grant\ud 2013/07699-0, S. Paulo Research Foundation). NLK is supported by a\ud FAPESP postdoctoral fellowship (grant 2016/03855-5). ACR is partially\ud supported by a CNPq fellowship (grant 306251/2014-0)

Tilted Implants

Introduction and aim: The authors discuss tilted dental implants. They define the tilted and the vertical implants, and they draw attention to biomechanical advantages, which the tilted implants bring.The first presumption of the effectivity of tilted implants is their high resistance to extra-axial occlusal loading. However, former papers based on photoelastic models, finite element analyses or clinical studies have proved this surprisingly high resistance. Results: Four indication groups are defined and they are illustrated by implantological cases. The most important indication of the tilted implants is the edentulous jaw in connection with the All-on-4 and All-on-6 concepts. Conclusions: The authors reveal that there is not any reason for the insertion of the vertical implants. The rationally disparallel implants are more effective. However, this trend is not followed enough in the Czech implantological practice. A definitive evaluation of the effectivity of the tilted implants will be provided on the basis of long-term clinical experience