scholarly journals Thinking inside the box: evaluation of polypropylene boxes for the storage of museum objects

2020 ◽  
Vol 34 ◽  
pp. 143-154
Author(s):  
Joana Rebordão Amaral
Keyword(s):  
Optimal Solution ◽  
Collection Management ◽  
Preventive Conservation ◽  
Custom Made ◽  
Museum Objects ◽  
Ongoing Assessment ◽  
Different Characteristics

In 2013 new improvements took place at the storage areas of the national palaces of Pena, Queluz and Sintra administrated by Parques de Sintra?Monte da Lua. The initial goal was to achieve a better use of the little space available by building custom made polypropylene boxes so stacking up could be done safely. We tried to develop a system that was simple and easily repeatable so that identical materials, methods and organization principles could be followed in storage areas in spite of the different characteristics of existing objects. This paper aims to share practical aspects that were developed while searching for an optimal solution to adequately cushion and box museum objects. The ongoing assessment, carried out according to the agents of deterioration, triggered significant changes to the initial methodology. Results of the evaluation of the use of boxes to block or mitigate some agents of deterioration and their contribution to preventive conservation are presented. How these improvements also reflected in collection management and lead to a better use of the collections is also discussed.

scholarly journals Agents of Deterioration of Organic Museum Objects and Their Management: A Review

2021 ◽  
Vol 04 (09) ◽  
Author(s):  
Suboohi Nasrin ◽  
Keyword(s):  
Rich Source ◽  
Preventive Conservation ◽  
Natural Heritage ◽  
Conservation Treatment ◽  
Museum Objects

Museums stored a number of objects which shows our cultural and natural heritage. These heritage materials are rich source of educative materials and are organic in nature. After a passage of time these collection become deteriorate due to some agencies. Organic objects are of immense importance, that’s why their protection and preservation are very necessary. In this article the author summarizes different agencies of deterioration and their preventive conservation treatment.

scholarly journals Museum og kranium. Institusjonell bevaring av menneskets viktigste kroppsdel

1970 ◽  
pp. 157
Author(s):  
Ole Marius Hylland
Keyword(s):  
Case Studies ◽  
Cultural Context ◽  
Human Head ◽  
Body Part ◽  
Cultural Value ◽  
Collection Management ◽  
Body Parts ◽  
Museum Objects ◽  
Human Skulls ◽  
Scientific Value

The article discusses the dilemmas and challenges that arises when we include ourselves in our collections, in the sense of human skulls and heads. The human head is undoubtedly the most vital of body parts, and a body part that has a unique symbolic and cultural value. Included in a collection, a head can evoke a large number of potential meanings, varying with the institutional and cultural context of the collection. In an anatomical collection a head signifies primarily scientific value, whereas in an ethnographic museum a head signifies the exotic and distant. Skulls and heads, whether they are pure bone, tattooed, shrinked, decapitated, stuffed or pickled, are also museum objects that make good case studies for the continuous discussion on the ethics of human remains in collections. The article uses a number of examples of different ways heads have been included in collections to point at the challenges of collection management in such cases.

scholarly journals HOPX Crossover Operator for the Fixed Charge Logistic Model with Priority Based Encoding

2018 ◽  
Vol 8 (6) ◽  
pp. 5351
Author(s):  
Ahmed Lahjouji El Idrissi ◽  
Chakir Tajani ◽  
Mohamed Sabbane
Keyword(s):  
Optimal Solution ◽  
Solution Space ◽  
Fixed Charge ◽  
Fixed Cost ◽  
Crossover Operator ◽  
Fixed Charge Transportation Problem ◽  
Logistic Problem ◽  
Probability Operators ◽  
Different Characteristics

In this paper, we are interested to an important Logistic problem modelised us optimization problem. It is the fixed charge transportation problem (FCTP) where the aim is to find the optimal solution which minimizes the objective function containig two costs, variable costs proportional to the amount shipped and fixed cost regardless of the quantity transported. To solve this kind of problem, metaheuristics and evolutionary methods should be applied. Genetic algorithms (GAs) seem to be one of such hopeful approaches which is based both on probability operators (Crossover and mutation) responsible for widen the solution space. The different characteristics of those operators influence on the performance and the quality of the genetic algorithm. In order to improve the performance of the GA to solve the FCTP, we propose a new adapted crossover operator called HOPX with the priority-based encoding by hybridizing the characteristics of the two most performent operators, the Order Crossover (OX) and Position-based crossover (PX). Numerical results are presented and discussed for several instances showing the performance of the developed approach to obtain optimal solution in reduced time in comparison to GAs with other crossover operators.

scholarly journals A Case Report: Custom Made Porous Titanium Implants in Revision: A New Option for Complex Issues

2018 ◽  
Vol 12 (1) ◽  
pp. 525-535
Author(s):  
Giorgio Burastero ◽  
Luca Cavagnaro ◽  
Francesco Chiarlone ◽  
Bernardo Innocenti ◽  
Lamberto Felli
Keyword(s):  
Bone Loss ◽  
Optimal Solution ◽  
Bone Defects ◽  
Porous Titanium ◽  
Titanium Implants ◽  
New Device ◽  
Custom Made ◽  
Knee Revision Surgery ◽  
Surgical Options ◽  
Clinical And Radiological Results

Background: Bone loss management is considered one of the most difficult challenges for orthopaedic surgeon. In massive bone defects, few surgical options are available and they do not offer a reliable or optimal solution for knee reconstruction. Objective: The aim of this paper is to present and justify a new custom-made approach for complex metadiaphyseal bone defects management in knee revision surgery. Methods: We report a case of a 66-year-old woman who underwent a staged left total knee arthroplasty revision for infection with Anderson Orthopaedic Research Institute classification III uncontained femoral and tibial metadiaphyseal bone defects following five prior surgeries. Along with a case discussion, we describe clinical and radiological outcomes of 3 similar patients treated with this new custom-made device. Results: To manage these problems, we developed new, custom porous titanium devices for both femoral and tibial reconstruction tailored to a patient’s specific bone loss. Since, 2014, we treated four cases using custom-made porous titanium cones and we had optimal clinical and radiological results, with no instances of loosening, component migration, or mismatches between preoperative planning and intraoperative findings. Conclusion: In extremely selected cases, this new device can be considered a possible and viable surgical step between “off the shelf” reconstruction implants and knee substitution with a tumor megaprosthesis.

Identifying Measurement Invariant Item Sets in Cross-Cultural Settings Using an Automated Item Selection Procedure

Methodology ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 177-188 ◽  
Author(s):  
Martin Schultze ◽  
Michael Eid
Keyword(s):  
Measurement Invariance ◽  
Optimal Solution ◽  
Selection Procedure ◽  
Cross Cultural ◽  
Item Selection ◽  
Ant System ◽  
Item Quality ◽  
Ant System Algorithm ◽  
Selection For ◽  
Selection Of

Abstract. In the construction of scales intended for the use in cross-cultural studies, the selection of items needs to be guided not only by traditional criteria of item quality, but has to take information about the measurement invariance of the scale into account. We present an approach to automated item selection which depicts the process as a combinatorial optimization problem and aims at finding a scale which fulfils predefined target criteria – such as measurement invariance across cultures. The search for an optimal solution is performed using an adaptation of the [Formula: see text] Ant System algorithm. The approach is illustrated using an application to item selection for a personality scale assuming measurement invariance across multiple countries.

Feasibility of a custom made retrieval modification in minimally invasive transapical aortic valve implantation

2010 ◽  
Vol 58 (S 01) ◽  
Author(s):  
J Blumenstein ◽  
J Kempfert ◽  
S Lehmann ◽  
A van Linden ◽  
D Merk ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Minimally Invasive ◽  
Custom Made ◽  
Aortic Valve Implantation ◽  
Valve Implantation

Regeneration von Knochendefekten mit computergesteuerter Herstellung von Gerüstträgern

2013 ◽  
Vol 22 (03) ◽  
pp. 180-187 ◽  
Author(s):  
J. Henke ◽  
J. T. Schantz ◽  
D. W. Hutmacher
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Custom Made

ZusammenfassungDie Behandlung ausgedehnter Knochen-defekte nach Traumata oder durch Tumoren stellt nach wie vor eine signifikante Heraus-forderung im klinischen Alltag dar. Aufgrund der bestehenden Limitationen aktueller Therapiestandards haben Knochen-Tissue-Engineering (TE)-Verfahren zunehmend an Bedeutung gewonnen. Die Entwicklung von Additive-Manufacturing (AM)-Verfahren hat dabei eine grundlegende Innovation ausgelöst: Durch AM lassen sich dreidimensionale Gerüstträger in einem computergestützten Schichtfür-Schicht-Verfahren aus digitalen 3D-Vorlagen erstellen. Wurden mittels AM zunächst nur Modelle zur haptischen Darstellung knöcherner Pathologika und zur Planung von Operationen hergestellt, so ist es mit der Entwicklung nun möglich, detaillierte Scaffoldstrukturen zur Tissue-Engineering-Anwendung im Knochen zu fabrizieren. Die umfassende Kontrolle der internen Scaffoldstruktur und der äußeren Scaffoldmaße erlaubt eine Custom-made-Anwendung mit auf den individuellen Knochendefekt und die entsprechenden (mechanischen etc.) Anforderungen abgestimmten Konstrukten. Ein zukünftiges Feld ist das automatisierte ultrastrukturelle Design von TE-Konstrukten aus Scaffold-Biomaterialien in Kombination mit lebenden Zellen und biologisch aktiven Wachstumsfaktoren zur Nachbildung natürlicher (knöcherner) Organstrukturen.

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