scholarly journals The Influence of Solvents on the Stability of Carbonated Hydroxyapatite

Proceedings ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 68
Author(s):  
Minea ◽  
Ion ◽  
Sorescu
Keyword(s):  
Cultural Heritage ◽  
Carbonated Hydroxyapatite ◽  
The Stability ◽  
Influence Of Solvents

Hydroxyapatite is an inorganic consolidant used in the restoration of cultural heritage. For thisreason, the study of the effects of different agents on hydroxyapatite is paramount [...]

scholarly journals Properties of Polymer-Composite Used as Fills of Asian Lacquerware: Issues on Restoration Processes of Lacquered Objects from Cultural Heritage

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Anne-Solenn Le Hô ◽  
Isabelle Fabre-Francke ◽  
Caroline Thiphavong
Keyword(s):  
Cultural Heritage ◽  
Mechanical Test ◽  
Chemical Properties ◽  
Composite Systems ◽  
Restoration Practice ◽  
The Common ◽  
Common Problems ◽  
The Stability ◽  
Material Composite ◽  
And Chemical Properties

One of the common problems encountered in lacquerware issued from cultural heritage is the appearance of lifting areas and some losses of material. Composite systems made of commercial polymer and different fills were tested as filling agents for the cracking, splitting, and losses compensation of Asian lacquer. For that purpose, the stability of traditional and modern commercially available materials usually used in the restoration practice of historical lacquerware was assessed. Their thermomechanical and chemical properties and surface state were evaluated by a set of techniques (TGA, DMA, mechanical test, contact angle value, and microtopography). There is a drastic change of the behavior of the interface between fill and Asian lacquer, dependent on the nature of the composite fillers. So the evaluation of materials and processes for the restoration of Asian lacquer were emphasized. The commercial Paraloid B72 used with glass microspheres as additives appeared to be the most stable of all of the investigated fillers.

scholarly journals SHINING 3D EINSCAN-PRO, APPLICATION AND VALIDATION IN THE FIELD OF CULTURAL HERITAGE, FROM THE CHILLIDA-LEKU MUSEUM TO THE ARCHAEOLOGICAL MUSEUM OF SARNO

2019 ◽  
Vol XLII-2/W18 ◽  
pp. 135-142 ◽  
Author(s):  
S. Morena ◽  
S. Barba ◽  
A. Álvaro-Tordesillas
Keyword(s):  
Cultural Heritage ◽  
Low Cost ◽  
Geometric Parameters ◽  
Measuring Systems ◽  
Dem Analysis ◽  
Precision And Accuracy ◽  
The Stability ◽  
Planar Measurement

Abstract. The following contribution focuses on the low-cost Shining 3D EinScan-Pro scanner, above all the analysis of its precision and accuracy. The need to prove the functioning of this instrumentation in practical cases (the sculptures by Eduardo Chillida preserved in the Chillida-Leku Museum and along with some artefacts collected in the Archaeological Museum of Sarno), has led to the comparison and validation of the instrument through a methodology necessarily diversified from the guideline VDI/VDE 2634, part 2 and part 3, characteristics to the test the optical 3D measuring systems with planar measurement, which works according to the triangulation principle. In particular, two types of comparisons were made: geometric-formal and metric-dimensional. The first type of analysis was carried out analysing the geometric parameters of the models, suitable for validating the information: dimensional (difference between some main measurements); superficial (total mesh extension) and of the form (that is, the discrepancies returned through a DEM analysis). The second type of analysis, instead, of the metric type, was carried out. The complete results of the various analyses will be presented and critically discussed within this contribution in order to prove the stability and the metric quality of this hand-held EinScan-Pro, following the comparison with medium-high end systems now well established in the field of cultural heritage survey.

scholarly journals Analysis of retaining wall stability in areas specified in register of objects of cultural heritage

2018 ◽  
Vol 174 ◽  
pp. 03010 ◽  
Author(s):  
Ryszard Chmielewski
Keyword(s):  
Cultural Heritage ◽  
Retaining Wall ◽  
Aerial Photographs ◽  
Apartment House ◽  
Existing Building ◽  
Expert Opinions ◽  
Ground Conditions ◽  
The Stability ◽  
Second World

The case study of the assurance of retaining wall stability in densely urbanized conservation and cultural heritage areas are described in this paper. During The Second World War many of these historic buildings in Warsaw were completely or partially destroyed and until these days their remains constitute elements of the existing building development of the capital of Poland. This may be connected with a change in the nature of applied loads as well as current functions of these buildings. The results of expert opinions and investigations are presented, regarding the operational and technical state of two retaining walls submitted to an expert before the repair works. When designing the design concept, both the historic character of structures, the technical feasibility of performing construction works in the densely urbanized area, as well as determined water and ground conditions were considered. The first of the analysed cases concerns the retaining wall localised in the vicinity of the Ordynacka Street and the Tamka street. After analysing the historical aerial photographs, it was found that the retaining wall constitutes an underground part of the apartment house destroyed during the warfare. The second case study refers to Warsaw Old Town - the retaining wall ensuring the stability of the Vistula escarpment along Brzozowa Street in Warsaw.

Evaluation of the stability of a rock cliff by means of geophysical and geomechanical surveys in a cultural heritage site (south-eastern Sicily)

2016 ◽  
Vol 135 (2) ◽  
pp. 308-323 ◽  
Author(s):  
Giovanna Pappalardo ◽  
Sebastiano Imposa ◽  
Simone Mineo ◽  
Sabrina Grassi
Keyword(s):  
Cultural Heritage ◽  
South Eastern ◽  
Heritage Site ◽  
The Stability

Preservation, Safeguard and Valorization of Masonry Decorations in the Architectural Historical Heritage of Piedmont (Italy)

2010 ◽  
Vol 133-134 ◽  
pp. 1015-1020 ◽  
Author(s):  
Alberto Carpinteri ◽  
Stefano Invernizzi ◽  
Giuseppe Lacidogna ◽  
Amedeo Manuello
Keyword(s):  
Acoustic Emission ◽  
Cultural Heritage ◽  
Quantitative Criterion ◽  
Noninvasive Methods ◽  
Ultrasonic Methods ◽  
Acoustic Methods ◽  
Historical Heritage ◽  
The Stability ◽  
Definition Of ◽  
Ultrasonic Investigation

In the present paper, a project for integrated investigation is described, using noninvasive methods, specially designed for dealing with the highly diversified historic heritage of Piedmont (Italy). The stability of the decorated surfaces will be investigated by innovative Acoustic Emission (AE) and ultrasonic methods already experimentally tested in the field of artistic and monumental cultural heritage in Italy. The ultrasonic investigation techniques allow assessing separations, defects and damage phenomena that can regard the decorated surfaces and the masonry supports. Innovative acoustic methods will allow distinguishing a well-preserved artwork in comparison to a damaged one providing a quantitative criterion for the definition of intervention priority.

scholarly journals Identifying Value-Increasing Actions for Cultural Heritage Assets through Sensitivity Analysis of Multicriteria Evaluation Results

2020 ◽  
Vol 12 (21) ◽  
pp. 9238
Author(s):  
Emanuele Salerno
Keyword(s):  
Decision Making ◽  
Sensitivity Analysis ◽  
Cultural Heritage ◽  
Adaptive Reuse ◽  
Multicriteria Decision Making ◽  
Decision Makers ◽  
Multicriteria Decision ◽  
Final Destination ◽  
The People ◽  
The Stability

This paper presents a brief overview of multicriteria decision making (MCDM) as applied to the evaluation of adaptive reuse projects for cultural heritage assets and proposes a strategy to plan interventions to increase their value. The value of an object can be defined from its fitness to fulfil specified objectives, its significance to the people who own or use it, its potential to produce revenues, and a host of other criteria depending on its nature. These criteria are often subjective, relying on judgements issued by several experts, stakeholders and decision makers. This is why the MCDM methods need to formalize the problem so as to make it suitable to be treated quantitatively. Moreover, its sensitivity to variable opinions must be studied to check the stability of the result. We propose to leverage sensitivity analysis to identify the lines of intervention that promise to be the most effective to increase the value of the asset. A simulated example illustrates this strategy. This approach promises to be useful when assessing the sustainability of a reuse or redevelopment project in the cases where the final destination of the asset is still under examination.

Lexical Parallels in Smolensk and Vitebsk Dialects (Non-Derived Vocabulary)

2020 ◽  
pp. 42-56
Author(s):  
Ekaterina Lunkova
Keyword(s):  
Cultural Heritage ◽  
The Other ◽  
Lexical Meaning ◽  
Specific Subject ◽  
Close Interaction ◽  
Historical Processes ◽  
History Of ◽  
The Common ◽  
The Stability ◽  
The One

Close interaction of Smolensk dialects with borderline Vitebsk and Mogilev ones is caused, on the one hand, by the common historical processes of the region, on the other hand, it is determined by the similarity of the cultural heritage of the Russian-Belarusian borderland. Throughout the Russian-Belarusian border, which runs through the territory of Smolensk region, there are a number of lexical formations that are a part of the existing language continuum that is of great interest to researchers from the standpoint of studying the existing dialect systems in synchrony and diachrony. It is expedient to oppose the existing dialect systems to the Russian and Belarusian standard languages in order to exclude possible facts of coincidence with a codified form from the description of the dialect language material. The found nouns with specific subject semantics are considered as lexical correspondences, i.e. regardless of the history of distribution or these units borrowing, from the standpoint of their synchronous existence in particular dialect systems. All dialect lexical correspondences can be divided into three groups, taking into account the similarity or degree of lexical meaning divergence. These groups are equivalent in different accounts and they correlate to each other on this criterion. This fact lets the study speaks in favor of the stability of the lexical meaning of non-derived nouns with specific subject semantics so that these nouns exist as lexical parallels in Smolensk and Vitebsk dialects.

scholarly journals Maintenance of the Old Building Facade During Its Reconstruction

2021 ◽  
pp. 220-231
Author(s):  
Irakli Kvaraia ◽  
◽  
Liana Giorgobiani ◽  
Keyword(s):  
Cultural Heritage ◽  
Special Importance ◽  
Reconstruction Process ◽  
Heritage Sites ◽  
Building Facade ◽  
The Stability ◽  
Main Frame

Facades of buildings are of special importance for the preservation of the traditional architectural appearance of cities. The façade of the building is a living expression of the era in which it was built and it is an integral part of history. Therefore, demolition of buildings declared as historical or cultural heritage sites is categorically unacceptable. It is necessary to carry out their reconstruction work, keeping the facade intact. In Tbilisi, back in the 70s of the last century, the restoration of houses with balconies began, and today the rehabilitationreconstruction of old neighborhoods is being successfully carried out. Many famous buildings have been completely renovated as a result of the reconstruction, but sometimes it is necessary to completely renovate the interior of the building. The main problem at this time is to maintain the stability of the façade walls, which often, during the reconstruction process, no longer have any connection with the main frame part. That is why they are temporarily strengthened. Due to the conditions of the reconstruction, the reinforcement constructions are arranged in different ways and after the completion of the works, the facade becomes an integral part of the new building again. In recent years, several such interesting reconstruction works have been carried out in Tbilisi.

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

Symmetric Multistep Methods Revisited: II. Numerical Experiments

1999 ◽  
Vol 173 ◽  
pp. 309-314 ◽  
Author(s):  
T. Fukushima
Keyword(s):  
Multistep Methods ◽  
Computational Time ◽  
Integration Time ◽  
Implicit Methods ◽  
Symmetric Methods ◽  
Celestial Bodies ◽  
The Stability ◽  
Predictor Corrector ◽  
Symmetric Multistep Methods ◽  
Integration Errors

AbstractBy using the stability condition and general formulas developed by Fukushima (1998 = Paper I) we discovered that, just as in the case of the explicit symmetric multistep methods (Quinlan and Tremaine, 1990), when integrating orbital motions of celestial bodies, the implicit symmetric multistep methods used in the predictor-corrector manner lead to integration errors in position which grow linearly with the integration time if the stepsizes adopted are sufficiently small and if the number of corrections is sufficiently large, say two or three. We confirmed also that the symmetric methods (explicit or implicit) would produce the stepsize-dependent instabilities/resonances, which was discovered by A. Toomre in 1991 and confirmed by G.D. Quinlan for some high order explicit methods. Although the implicit methods require twice or more computational time for the same stepsize than the explicit symmetric ones do, they seem to be preferable since they reduce these undesirable features significantly.

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