Information Systems for Composite Materials: Requirements and Challenges

2014 ◽  
Vol 597 ◽  
pp. 59-62
Author(s):  
Wilhelm Dangelmaier ◽  
Thomas Sommer-Dittrich ◽  
Jenny Streichhan ◽  
Markus Monhof
Keyword(s):  
Information Systems ◽  
Data Storage ◽  
Material Selection ◽  
Selection Process ◽  
Complex Structure ◽  
Wide Distribution ◽  
Reinforced Composites ◽  
Problem Domain ◽  
Lightweight Construction ◽  
Composite Data

Using fiber-reinforced composites (FRC) in automotive lightweight construction currently is too expensive to achieve a wide distribution. To assist the engineers’ material selection process suitable information systems are needed. Development of those are a hard task due to the complex structure of FRC. In this paper we give an insight to the problem domain and introduce requirements which should be met by an information system for composite data storage.

Development of a fuzzy-TOPSIS multi-criteria decision-making model for material selection with the integration of safety, health and environment risk assessment

2021 ◽  
pp. 146442072199426
Author(s):  
Aamir AA Rahim ◽  
S Numaya Musa ◽  
S Ramesh ◽  
Ming K Lim
Keyword(s):  
Risk Assessment ◽  
Decision Making ◽  
Material Selection ◽  
Manufacturing Sector ◽  
Selection Process ◽  
Complex Structure ◽  
Fuzzy Topsis ◽  
Multi Criteria Decision Making ◽  
Automotive Body ◽  
Risks Assessment

This study presents the development of a fuzzy-TOPSIS multi-criteria decision-making (MCDM) model for material selection with integrated safety, health, and environment risk assessment. As safety, health, and environment is very much linked to sustainable design and manufacturing, it is imperative that safety, health, and environment is taken into consideration in ensuring a comprehensive and holistic material selection process. This paper shows the possibility of fuzzy logic utilization in assessing safety, health, and environment risk and proposed a methodology based on fuzzy-TOPSIS MCDM model for material selection suitable for the manufacturing sector. This method has the capability of producing a ranking result with strong reasonings. The proposed method facilitates the designer to select, evaluate, and rank material alternatives based on given attributes from design requirements and weighting given by the decision-makers. Additionally, the other benefits of the proposed methodology are the elimination of a complex structure and/or a black-box algorithm. The fuzzy-TOPSIS approach capable of considering not only the uncertainty related to qualitative judgments but also the uncertainty that may reside in the measurement of quantitative or qualitative parameters that exist within the safety, health, and environment risks assessment. A numerical example of selecting material for automotive body panels using the proposed method has been discussed.

scholarly journals Structural and optical properties of amorphous Si–Ge–Te thin films prepared by combinatorial sputtering

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. Mihai ◽  
F. Sava ◽  
I. D. Simandan ◽  
A. C. Galca ◽  
I. Burducea ◽  
...  
Keyword(s):  
Optical Properties ◽  
Data Storage ◽  
Optical Sensors ◽  
Material Selection ◽  
Functional Materials ◽  
Stability Study ◽  
Optical Data Storage ◽  
Optical Data ◽  
Structural And Optical Properties ◽  
Topological Constraint

AbstractThe lack of order in amorphous chalcogenides offers them novel properties but also adds increased challenges in the discovery and design of advanced functional materials. The amorphous compositions in the Si–Ge–Te system are of interest for many applications such as optical data storage, optical sensors and Ovonic threshold switches. But an extended exploration of this system is still missing. In this study, magnetron co-sputtering is used for the combinatorial synthesis of thin film libraries, outside the glass formation domain. Compositional, structural and optical properties are investigated and discussed in the framework of topological constraint theory. The materials in the library are classified as stressed-rigid amorphous networks. The bandgap is heavily influenced by the Te content while the near-IR refractive index dependence on Ge concentration shows a minimum, which could be exploited in applications. A transition from a disordered to a more ordered amorphous network at 60 at% Te, is observed. The thermal stability study shows that the formed crystalline phases are dictated by the concentration of Ge and Te. New amorphous compositions in the Si–Ge–Te system were found and their properties explored, thus enabling an informed and rapid material selection and design for applications.

Research on Material Selection with Multi-Attribute Decision Method and G1 Method

2014 ◽  
Vol 952 ◽  
pp. 20-24 ◽  
Author(s):  
Xue Jun Xie
Keyword(s):  
Material Selection ◽  
Selection Process ◽  
Selection Problem ◽  
Topsis Method ◽  
Attribute Weight ◽  
Multi Attribute Decision Making ◽  
Judgment Matrix ◽  
Optimal Material ◽  
Selection Of ◽  
Better Than

The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application. Many factors (attributes) need to be considered in material selection process, and thus material selection problem is a multi-attribute decision making (MADM) problem. This paper proposes a new MADM method for material selection problem. G1 method does not need to test consistency of the judgment matrix. Thus it is better than AHP. In this paper, firstly, we use the G1 method to determine the attribute weight. Then TOPSIS method is used to calculate the closeness of the candidate materials with respect positive solution. A practical material selection case is used to demonstrate the effectiveness and feasibility of the proposed method.

scholarly journals Sustainable Construction by Means of Improved Material Selection Process

2019 ◽  
Vol 3 (1) ◽  
pp. 85 ◽  
Author(s):  
Koorosh Gharehbaghi ◽  
Maged Georgy
Keyword(s):  
Energy Savings ◽  
Material Selection ◽  
Selection Process ◽  
Sustainable Construction ◽  
Construction Operation ◽  
Selection Factors ◽  
Strength And Durability ◽  
Operation Cost ◽  
Selection Of

Whilst sustainable construction relates to both a building’s structure and the use of proper life cycle processes, the selection of the most appropriate material/s is deemed a considerable undertaking. Throughout a building’s lifecycle that extends from design, construction, operation, maintenance, renovation, until demolition, the selection of sustainable material/s is a particularly crucial task for the development and establishment of such structures. Traditionally, there are three main materials for general construction: (1) Steel, (2) Concrete and (3) Timber. These materials not only influence the function within the structure, but also affect the operation cost and energy usage. Operation cost reduction and energy savings are typically elements of the sustainable construction sphere. However, in developing countries, there is a variety of highly critical factors, which can impact material selection as well as the long-term sustainability of the structure, including: Fire Performance, Environmental Impact, Structural Performance (strength and durability), and Functioning Capabilities. Accordingly, this paper will first compare the sustainability of these three key materials and then converse with appropriate processes for material selection. Attention will be given to the sustainable construction recompense associated with the different material selection factors. Doing so ensures a more sustainable built environment by means of an improved material selection process.

scholarly journals Storing Hypergraph-Based Data Models in Non-hypergraph Data Storage and Applications for Information Systems

2021 ◽  
pp. 1-21
Author(s):  
Bálint Molnár ◽  
András Béleczki ◽  
Bence Sarkadi-Nagy
Keyword(s):  
Information Systems ◽  
Data Storage ◽  
Data Model ◽  
Relational Data ◽  
Complex Data ◽  
Graph Representations ◽  
Relational Data Model ◽  
Rich Information ◽  
The Relationship

Data structures and especially the relationship among the data entities have changed in the last couple of years. The network-like graph representations of data-model are becoming more and more common nowadays, since they are more suitable to depict these, than the well-established relational data-model. The graphs can describe large and complex networks — like social networks — but also capable of storing rich information about complex data. This was mostly of relational data-model trait before. This also can be achieved with the use of the knowledge representation tool called “hypergraphs”. To utilize the possibilities of this model, we need a practical way to store and process hypergraphs. In this paper, we propose a way by which we can store hypergraphs model in the SAP HANA in-memory database system which has a “Graph Core” engine besides the relational data model. Graph Core has many graph algorithms by default however it is not capable to store or to work with hypergraphs neither are any of these algorithms specifically tailored for hypergraphs either. Hence in this paper, besides the case study of the two information systems, we also propose pseudo-code level algorithms to accommodate hypergraph semantics to process our IS model.

Calculation method of belt material parameters for finite element tire model

2021 ◽  
pp. 095440702110422
Author(s):  
Lu Zhang ◽  
Shaohua Wang ◽  
Bing Li
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
Complex Structure ◽  
Three Dimensional ◽  
Anisotropic Elasticity ◽  
Dynamic Responses ◽  
Reinforced Composites ◽  
Tire Model ◽  
Material Parameters ◽  
Vehicle Dynamic Simulation

The radial tire belt is composed of multi-layered fiber-reinforced cords with a very complex structure. Restricted by the computing speed, the simplified finite element (FE) tire model with equivalent belt is usually applied in the vehicle dynamic simulation. However, it is always difficult to obtain the material parameters of the equivalent belt. In this paper, a calculation method of equivalent belt material parameters for the simplified FE tire model is proposed based on the three-dimensional (3-D) anisotropic elasticity of the cord reinforced composites. The simulation results of the static radial stiffness, modal characteristics, and dynamic responses for the simplified FE tire model with parameters obtained by the calculation method were compared with experiment results. The results show that the deviation between the experiment and simulation is acceptable, and the validity of the calculation method is verified.

Web-Based Acceptance Of Candidate Mustahiq Information System (Cangkir Yadufa Social Religious Foundation)

Academia Open ◽  
2021 ◽  
Vol 5 ◽  
Author(s):  
Andre Pramanta Widianto ◽  
Cindy Taurusta
Keyword(s):  
Information System ◽  
Information Systems ◽  
Data Collection ◽  
Data Storage ◽  
Literature Study ◽  
Microsoft Excel ◽  
Manual Work ◽  
Web Based ◽  
Needed Information ◽  
Collection Methods

In a foundation there is a need for fast and fast mustahiq data storage. This socio-religious foundation for the yadufa cup is still stored manually. The previous data storage was still using Microsoft Excel. In the current era technology is needed, information systems to make it easier for admins to complete their work. From manual work to computerized. The writing uses data collection methods in the form of interviews with the admin of the foundation to find out the problems. Then do a literature study by reading the appropriate previous research. Then analyze the main problems that exist to determine the boundaries of the problem. The conclusion of this study aims to research the manufacture of "WEB- based information system for acceptance of mustahiq candidates (Yayasan socio- religious cup Yadufa) is to create and provide an information system that can be used to store data accurately, record recipients of mustahiq participants quickly and accurately.

Modeling

2010 ◽  
Vol 1 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Petraq Papajorgji ◽  
François Pinet ◽  
A. Miralles ◽  
E. Jallas ◽  
P.M. Pardalos
Keyword(s):  
Information Systems ◽  
Design Patterns ◽  
Unified Modeling Language ◽  
Object Constraint Language ◽  
Problem Domain ◽  
Enterprise Information ◽  
Model Driven ◽  
Environmental Information Systems ◽  
Spatial Systems ◽  
Present Design

Enterprise information systems in agriculture and environment are becoming more complex and difficult to design and implement. This paper aims to show our vision on using model-based approaches to design complex and flexible agricultural and environmental information systems. At the center of this modeling approach is the Unified Modeling Language that facilitates expressing visually concepts of a problem domain and their relationships. UML has a core of notations that are generic and that can be used to model problems in any domain but can be extended to create profiles in order to take into consideration modeling concerns in a particular problem domain. UML profiles are created to use UML in designing spatial systems, ontologies, model driven architecture-based systems and Web-based systems and a recent profile makes it possible to use UML for business modeling purposes. UML is used to present design patterns; their use is crucial in designing complex and flexible information systems. Recently, UML is enriched with Object Constraint Language that is used to express constraints on modeling artifacts. The paper presents the state of the art in modeling agricultural and environmental systems and provides discussions for future directions.

A Case of Information Systems Pre-Implementation Failure

2011 ◽  
pp. 32-48
Author(s):  
Christoph Schneider ◽  
Suprateek Sarker
Keyword(s):  
Information Systems ◽  
Selection Process ◽  
User Involvement ◽  
Functional Requirements ◽  
System Failures ◽  
Computerized Maintenance Management System ◽  
Implementation Failure ◽  
Types Of Information ◽  
Implementation Stage

This case study examines an often overlooked context of information system failures, that of pre-implementation failure. It focuses on an Information Systems Development (ISD) project at a large public university that failed even before implementation could get under way. Specifically, it describes the vendor selection process of a proposed computerized maintenance management system. While the managers in charge of the project took great care to avoid commonly discussed types of information systems failures by emphasizing user involvement and trying to select the best possible system they could afford, non-functional requirements, procedures as outlined in the RFP, and the roles of relevant but relatively “hidden” decision makers during the pre-implementation stage of the project were overlooked. This led to the termination of the project after an appeal was lodged by a software vendor whose product had not been selected for implementation.

scholarly journals Design Innovation and Validation of a Non-Electric Hearing Aid for Improved Usability

2018 ◽  
Vol 7 (3.7) ◽  
pp. 90
Author(s):  
Poh Kiat Ng ◽  
Kian Siong Jee ◽  
Li Wah Thong ◽  
Jian Ai Yeow
Keyword(s):  
Cost Analysis ◽  
Hearing Aids ◽  
Material Selection ◽  
Selection Process ◽  
Hearing Aid ◽  
Electric Hearing ◽  
Design Innovation

This study aims to innovate and validate the design of a non-electric hearing aid for improved usability. Studies on conventional and existing hearing aids were carried out before the actual study on developing this non-electric hearing aid was done. The final product underwent a series of evaluations in order to verify its viability and usability. Conceptualisation, material selections and concept selections were carried out in order to select the most appropriate concept for this study. The material selection process ensures that the choice of material is appropriate for the specific requirements of the components to be achieved. Subsequently, a detailed cost analysis was carried out to ensure that the manufactured product would be affordable to the customers. Several experiments and tests were performed to evaluate the product’s performance. Although a validated prototype for a non-electric hearing aid is in hand, future improvements on the fabricated product are still needed in order to ready the product for its future commercialisation phase. 

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