Development of a Computer Tool to Support the Teaching of Materials Technology

2017 ◽  
Vol 903 ◽  
pp. 17-23 ◽  
Author(s):  
Álvaro Rodríguez-Prieto ◽  
Ana Maria Camacho ◽  
Miguel Ángel Sebastián
Keyword(s):  
Mechanical Properties ◽  
Nuclear Reactor ◽  
Pressure Vessels ◽  
Computer Tool ◽  
Materials Engineering ◽  
Service Behavior ◽  
Stringency Level ◽  
The Relationship ◽  
Selection Of

Materials technology is a matter of great applicative and crosscutting interest, as evidenced by their presence in most curriculums of the current industrial engineering degrees. During the development of this matter, it is crucial that the student assimilates not only the relationship among composition, processing and mechanical properties, but also, how all these technological features interact facing the in-service behavior of the material. That is why, within a Doctoral dissertation developed at the Department of Construction and Manufacturing Engineering at the National Distance Education University (UNED), it has designed a computer tool to quantify the stringency level of technological requirements of materials (especially suitable for high demanding applications), characterized by its suitability as interactive teaching material used in the teaching of materials engineering. As a case study, we have chosen a selection of materials for nuclear reactor pressure vessels, because it is a very representative example of the relationship between chemical composition, mechanical properties and in-service behavior.

scholarly journals Integration Dematel and ANP for The Supplier Selection in The Textile Industry: A Case Study

2021 ◽  
Vol 20 (1) ◽  
pp. 119-130
Author(s):  
Dana Marsetiya Utama ◽  
Bianca Maharani ◽  
Ikhlasul Amallynda
Keyword(s):  
Decision Making ◽  
Supply Chain ◽  
Textile Industry ◽  
Supplier Selection ◽  
Analytic Network Process ◽  
Product Price ◽  
Network Process ◽  
The Relationship ◽  
Selection Of

Currently, companies are required to improve supply chain performance. One of the main problems in the supply chain is the proper supplier selection. Supplier selection has an essential role in improving supply chain management performance. Supplier selection requires the proper criteria. However, the relationship between criteria is rarely considered in the selection of suppliers in the textile industry. This study tries to propose integrating the Decision Making Trial and Evaluation Laboratory (DEMATEL) and the Analytic Network Process (ANP) for supplier selection in the textile industry. Both methods are multi-criteria decision making (MCDM) tools DEMATEL is used to assess the relationship between criteria. Furthermore, ANP is used to evaluate and weigh the importance of criteria and suppliers. A case study was carried out in a textile company located in Indonesia. The results show that this procedure can identify the relationship and effect of each criterion. The results show that the product price criteria are the criteria that have the most significant weight. The criteria for conformity to specifications and consistency of quality are in second and third place. Finally, suppliers are selected based on weight assessment on each criterion by ANP.

scholarly journals Part-time student selection problem with a novel hybrid approach based on DEMATEL-modified ANP and MULTIMOORA methods

2021 ◽  
Author(s):  
Derya Deliktaş ◽  
◽  
Büşra Günhan ◽  
Keyword(s):  
Decision Making ◽  
Hybrid Approach ◽  
Subjective Assessment ◽  
Suitable Alternative ◽  
Materials Engineering ◽  
Engineering Department ◽  
Part Time ◽  
The University ◽  
Selection Of

This study proposes a hybrid approach for the selection of students employed part-time at the various departments of a university. There are both qualitative and quantitative criteria for the selection of students. Thus, to handle the subjective assessment in the decision-making process, this study considers developing DEMATEL-modified ANP and MULTIMOORA. An empirical case study applied at Metallurgical and Materials Engineering Department in Turkey is exhibited to test the effectiveness of the proposed decision-making method, which provides a fair selection considering three main and seven sub-criteria. These criteria are determined in accordance with the previous experience of the commission members and the principles which are listed in the Administration Guideline of the university. One among five candidates is selected by a novel hybrid approach. The obtained results and all scenarios in sensitivity analysis based on the changing of the decision makers’ weights and the changing of the dimension weights indicate that the S3 student remains the most preferred alternative, and the S4 student mostly is the most suitable alternative, respectively.

scholarly journals Flexibility of Dense 3D Data Capture

2021 ◽  
Vol 5 (1) ◽  
pp. 62-74
Author(s):  
Martina Attenni ◽  
Marika Griffo ◽  
Carlo Inglese ◽  
Alfonso Ippolito ◽  
Eric Lo ◽  
...  
Keyword(s):  
Data Capture ◽  
Object A ◽  
Built Heritage ◽  
3D Data ◽  
Technological Advances ◽  
Urban Contexts ◽  
Point Data ◽  
The Relationship ◽  
Selection Of

The knowledge and study of built heritage is now deeply connected to methodologies associated with the capture of surface details via the production of point-data. These methodologies enable researchers to gather a wider range of information, which is increasingly more connected to technological advances. Such approaches influence the management of data, and these data are often redundant due to the ways in which they are captured. Massive data capture does not include preliminary selection based on metric, geometric, and material features of the object. A multi-scalar approach, in which the criteria for data capture depends on the goals of the survey, is needed to optimize the relationship between information and the scale of the models to be built. This case study involving a selection of fountains in Rome aims to apply these principles to urban contexts defined by a strong spatial connection between architectural and sculptural elements. Survey can express this distinctiveness through complex, dynamic, and effective digital models.

scholarly journals Verso il restauro

2013 ◽  
Author(s):  
Maurizio De Vita
Keyword(s):  
Final Stage ◽  
University Education ◽  
University Faculty ◽  
The World ◽  
Methods And Techniques ◽  
Specific Discipline ◽  
The University ◽  
The Relationship ◽  
Selection Of

The book brings together critical considerations and experiences linked to the work of the author, lecturer in restoration at the Florence University Faculty of Architecture, as supervisor of degree theses on restoration. The reflections concern teaching Restoration as a subject, the conditions within which the knowledge and culture of restoration can ripen within our universities and the most recent problems encountered by both the discipline and restoration projects. In the first part of the publication, these aspects are set out in broad and more precisely conceptual and methodological terms in chapters and themed paragraphs which also act as a guide to drawing up degree theses on restoration, as well as a contributing to the didactics and efficiency of the specific discipline. This is followed by a selection of degree theses on restoration discussed in recent years which show the route from the principles, general problems and intervention criteria for every case study to drawing up a project. They are projects that deal with analysis methods and techniques, surveys, specialist restorations, regeneration, and the relationship between old and new. In short, the projects are what gave the final stage in the university education meaning and substance, also in order to acquire fundamental keys to restoration culture and activities in the world after university.

Dyeing and Mechanical Properties of Cotton Modified for Cationic Dyes with Hydrophobic and Acidic Groups

1992 ◽  
Vol 62 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Kazuhiko Fukatsu
Keyword(s):  
Mechanical Properties ◽  
General Trend ◽  
Breaking Load ◽  
Cationic Dyes ◽  
Superior Performance ◽  
Chemically Modified ◽  
Basic Studies ◽  
The Relationship ◽  
Sulfonic Acid Groups ◽  
Selection Of

Basic studies define the relationship between dyeability for cationic dyes and mechanical properties of chemically modified cotton fabric. Introduction of benzoyl and sulfonic acid groups provides either satisfactory dyeability for cationic dyes or color-fastness, and mechanical properties are reported as a function of the benzoate degree of substitution value. The general trend is toward increased breaking load and bending stiffness and decreased wrinkle recovery for the chemically modified fabrics, but within this trend there is latitude for selection of the degree of substituent groups to provide superior performance.

scholarly journals Some Useful Mechanical Property Correlations for Nuclear Reactor Pressure Vessel Steels

2018 ◽  
Author(s):  
Randy K. Nanstad ◽  
William L. Server ◽  
Mikhail A. Sokolov ◽  
G. Robert Odette ◽  
Nathan Almirall
Keyword(s):  
Mechanical Property ◽  
Nuclear Reactor ◽  
Pressure Vessels ◽  
Nuclear Industry ◽  
Rigorous Approach ◽  
Pressure Vessel Steels ◽  
Physically Based ◽  
Induced Changes ◽  
The Relationship ◽  
Reactor Pressure

The use of correlations is common in the research and development arena of the nuclear industry with the realization that some applications with direct implications to safety demand a more rigorous approach. Most correlations involve the relationship between two experimental properties, such as that between hardness and tensile strength. There are others that are much more complicated and are often designated models because they incorporate physically-based knowledge; examples of this are predictive correlations for irradiation-induced embrittlement of reactor pressure vessels (RPV). The objective of this paper is to collect and discuss many of the commonly used correlations for applications to nuclear RPVs. This paper identifies and discusses various correlations that relate easily measured properties to properties that are more difficult, more time consuming, or more expensive to measure. In the case of irradiated RPV materials, irradiation-induced changes in easily measured properties are related to the changes in those more difficult to measure. It is noted that recognition and understanding of the uncertainties associated with all correlations is highly important.

scholarly journals ‘Diagrams of Motion’: Stop-Motion Animation as a Form of Kinetic Sculpture in the Short Films of Jan Švankmajer and the Brothers Quay

Animation ◽  
2018 ◽  
Vol 13 (2) ◽  
pp. 148-161 ◽  
Author(s):  
Ewan Wilson
Keyword(s):  
Found Objects ◽  
Short Films ◽  
Stop Motion ◽  
Past Experiences ◽  
The Relationship ◽  
Latent Content ◽  
Selection Of ◽  
Fixed Moment

Jean-Luc Godard wrote that ‘The cinema is not an art which films life; the cinema is something between art and life’ (cited in Roud’s, 2010, biography of Godard), an observation particularly true of stop-motion animation. The filmmakers discussed in this essay, Jan Švankmajer and the Brothers Quay, share a fascination with the latent content of found objects; they believe that forgotten toys, discarded tools and other such objects contain echoes of past experiences. Extrapolating Švankmajer’s belief that memories are imparted to the objects we touch, the manipulation of his found objects as puppets in his films becomes a means of evoking and repurposing their latent content, just as the Quays develop their dreamlike films from the psychic content they perceive in their armatures. Making a case study of a selection of these animators’ short films, this article examines the practice of stop-motion animation against that of kinetic sculpture, unpicking the complexities of the relationship between the inherently static mediums of sculpture and photography – symbolic of a fixed moment in time – and that of stop-motion animation, a temporal pocket in which these fossilized moments are revived once more.

scholarly journals Basic Principles in the Design of Spider Silk Fibers

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1794
Author(s):  
José Pérez-Rigueiro ◽  
Manuel Elices ◽  
Gustavo R. Plaza ◽  
Gustavo V. Guinea
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Spider Silk ◽  
Design Principles ◽  
Tensile Behavior ◽  
Original Design ◽  
Basic Principles ◽  
Silk Fibers ◽  
The Relationship ◽  
Selection Of

The prominence of spider silk as a hallmark in biomimetics relies not only on its unrivalled mechanical properties, but also on how these properties are the result of a set of original design principles. In this sense, the study of spider silk summarizes most of the main topics relevant to the field and, consequently, offers a nice example on how these topics could be considered in other biomimetic systems. This review is intended to present a selection of some of the essential design principles that underlie the singular microstructure of major ampullate gland silk, as well as to show how the interplay between them leads to the outstanding tensile behavior of spider silk. Following this rationale, the mechanical behavior of the material is analyzed in detail and connected with its main microstructural features, specifically with those derived from the semicrystalline organization of the fibers. Establishing the relationship between mechanical properties and microstructure in spider silk not only offers a vivid image of the paths explored by nature in the search for high performance materials, but is also a valuable guide for the development of new artificial fibers inspired in their natural counterparts.

Selection of candidate materials for reactor pressure vessels: Application of irradiation embrittlement prediction models and a stringency level methodology

2017 ◽  
Vol 233 (5) ◽  
pp. 965-976 ◽  
Author(s):  
Álvaro Rodríguez-Prieto ◽  
Ana María Camacho ◽  
Miguel Ángel Sebastián
Keyword(s):  
Chemical Composition ◽  
Western Europe ◽  
Prediction Models ◽  
Pressure Vessels ◽  
Fourth Generation ◽  
Irradiation Embrittlement ◽  
Water Reactors ◽  
Stringency Level ◽  
Reactor Pressure ◽  
Selection Of

The selection of materials for the reactor pressure vessel manufacturing is a complex process that involves great responsibility because small differences in chemical composition can adversely affect the manufacturing process and the in-service behavior of the material. Thus, it is recommendable to perform previous materials pre-selection stages based on the state-of-the-art knowledge, integrating research results with standardized requirements and using simplifier materials selection methodologies like the stringency level method. To address this issue, an evaluation of the influence of chemical composition on the shift of the ductile-to-brittle transition temperature has been performed using the most used and consolidated prediction models that are R.G. 1.99 Rev.2, NUREG/CR-6551, and ASTM E 900-02. A proposal of maximum limits for copper, nickel, and phosphorous to avoid irradiation embrittlement has been presented to carry out the process. The results have been analyzed by using the stringency level methodology to support the decision process. To this end, a materials data collection has been carried out to analyze the requirements described by 20 different specifications of materials from first to fourth generation of light water reactors, covering the main designs of pressurized reactors from Western Europe, North America, Japan, and Russia. It can be concluded that more recently developed materials exhibit more stringent requirements than earlier developed materials.

Lourenço Marques and Lisbon in João Albasini’s chronicles

2020 ◽  
Vol 19 (1) ◽  
pp. 27-41 ◽  
Author(s):  
Jessica Falconi
Keyword(s):  
Social Relations ◽  
Literary Culture ◽  
Urban Life ◽  
Periodical Press ◽  
Port Cities ◽  
Portuguese Empire ◽  
Port Facilities ◽  
The Relationship ◽  
Selection Of

The Mozambique-born journalist João dos Santos Albasini (1876–1922) is one of the most well-known names of the colonial periodical press of the Portuguese Empire. Furthermore, he is often mentioned in historiographical accounts on the birth and development of literary culture in colonial Mozambique. Albasini lived during the period of development of the port facilities in Lourenço Marques and as it underwent deep transformations in its social relations. As a main project of the capital city’s growth, the development of the port and the railways dominated urban life and the landscape, which is reflected peculiarly in Albasini’s life and writing. This article is a case study of the relationship between the colonial periodical press and port cities through analyses of a selection of his chronicles published in the newspapers O Africano (The African) (1908–18) and O Brado Africano (The African Cry) (1918–75).

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