Systems Approaches to Materials Design: Past, Present, and Future

2019 ◽  
Vol 49 (1) ◽  
pp. 103-126 ◽  
Author(s):  
Raymundo Arróyave ◽  
David L. McDowell
Keyword(s):  
Systems Engineering ◽  
Data Science ◽  
Multiple Scales ◽  
Critical Role ◽  
Materials Design ◽  
Structure Property ◽  
Design Development ◽  
Analysis And Design ◽  
Path Structure ◽  
Oriented Activity

There is increasing awareness of the imperative to accelerate materials discovery, design, development, and deployment. Materials design is essentially a goal-oriented activity that views the material as a complex system of interacting subsystems with models and experiments at multiple scales of materials structure hierarchy. The goal of materials design is effectively to invert quantitative relationships between process path, structure, and materials properties or responses to identify feasible materials. We first briefly discuss challenges in framing process-structure-property relationships for materials and the critical role of quantifying uncertainty and tracking its propagation through analysis and design. A case study exploiting inductive design of ultrahigh-performance concrete is briefly presented. We focus on important recent directions and key scientific challenges regarding the highly collaborative intersections of materials design with systems engineering, uncertainty quantification and management, optimization, and materials data science and informatics, which are essential to fueling continued progress in systems-based materials design.

scholarly journals The spirobichroman-based polyimides with different side groups: from structure–property relationships to chain packing and gas transport performance

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5086-5095
Author(s):  
Shuli Wang ◽  
Xiaohua Tong ◽  
Chunbo Wang ◽  
Xiaocui Han ◽  
Sizhuo Jin ◽  
...  
Keyword(s):  
Dihedral Angle ◽  
Gas Separation ◽  
Gas Transport ◽  
Critical Role ◽  
Polymer Membranes ◽  
Separation Performance ◽  
Structure Property ◽  
Chain Packing ◽  
Structure Property Relationships ◽  
Gas Separation Performance

Effect of substituents on the dihedral angle and chain packing plays a critical role in the enhancement in the gas separation performance of polymer membranes.

scholarly journals Ab initio molecular dynamics and materials design for embedded phase-change memory

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Liang Sun ◽  
Yu-Xing Zhou ◽  
Xu-Dong Wang ◽  
Yu-Han Chen ◽  
Volker L. Deringer ◽  
...  
Keyword(s):  
Phase Change ◽  
High Performance ◽  
Materials Design ◽  
Atomic Scale ◽  
Ab Initio Molecular Dynamics ◽  
Core Material ◽  
Structure Property ◽  
Switching Speed ◽  
Atomic Structures ◽  
Memory Applications

AbstractThe Ge2Sb2Te5 alloy has served as the core material in phase-change memories with high switching speed and persistent storage capability at room temperature. However widely used, this composition is not suitable for embedded memories—for example, for automotive applications, which require very high working temperatures above 300 °C. Ge–Sb–Te alloys with higher Ge content, most prominently Ge2Sb1Te2 (‘212’), have been studied as suitable alternatives, but their atomic structures and structure–property relationships have remained widely unexplored. Here, we report comprehensive first-principles simulations that give insight into those emerging materials, located on the compositional tie-line between Ge2Sb1Te2 and elemental Ge, allowing for a direct comparison with the established Ge2Sb2Te5 material. Electronic-structure computations and smooth overlap of atomic positions (SOAP) similarity analyses explain the role of excess Ge content in the amorphous phases. Together with energetic analyses, a compositional threshold is identified for the viability of a homogeneous amorphous phase (‘zero bit’), which is required for memory applications. Based on the acquired knowledge at the atomic scale, we provide a materials design strategy for high-performance embedded phase-change memories with balanced speed and stability, as well as potentially good cycling capability.

Characterizing spatial structures of larval fish assemblages at multiple scales in relation to environmental heterogeneity in the Strait of Georgia (British Columbia, Canada)

2018 ◽  
Vol 75 (11) ◽  
pp. 1902-1914 ◽  
Author(s):  
Lu Guan ◽  
John F. Dower ◽  
Pierre Pepin
Keyword(s):  
British Columbia ◽  
Environmental Heterogeneity ◽  
Multiple Scales ◽  
Larval Fish ◽  
Critical Role ◽  
Multiscale Approach ◽  
Spatial Structures ◽  
Strait Of Georgia ◽  
Medium Scale

Spatial structures of larval fish in the Strait of Georgia (British Columbia, Canada) were quantified in the springs of 2009 and 2010 to investigate linkages to environmental heterogeneity at multiple scales. By applying a multiscale approach, principal coordinate neighborhood matrices, spatial variability was decomposed into three predefined scale categories: broad scale (>40 km), medium scale (20∼40 km), and fine scale (<20 km). Spatial variations in larval density of the three dominant fish taxa with different early life histories (Pacific herring (Clupea pallasii), Pacific hake (Merluccius productus), and northern smoothtongue (Leuroglossus schmidti)) were mainly structured at broad and medium scales, with scale-dependent associations with environmental descriptors varying interannually and among species. Larval distributions in the central-southern Strait were mainly associated with salinity, temperature, and vertical stability of the top 50 m of the water column on the medium scale. Our results emphasize the critical role of local estuarine circulation, especially at medium spatial scale, in structuring hierarchical spatial distributions of fish larvae in the Strait of Georgia and suggest the role of fundamental differences in life-history traits in influencing the formation and maintenance of larval spatial structures.

scholarly journals STEM- Based Multimedia Design for Stimulating HOTS in Theory Bioenergy and Wind Energy: Perception Physics Teacher

2019 ◽  
Vol 8 (2) ◽  
pp. 129-139
Author(s):  
Farah Aulia ◽  
◽  
Agus Suyatna ◽  
Viyanti Viyanti ◽  
◽  
...  
Keyword(s):  
High School Students ◽  
Wind Energy ◽  
Physics Education ◽  
Needs Analysis ◽  
Design Development ◽  
Energy Materials ◽  
School Students ◽  
Analysis And Design ◽  
Physics Teacher ◽  
Two Stages

The purpose of thiis research is to develop multimedia with the STEM approach to stimulate HOTS on bioenergy and wind energy materials. The research and development (R&D) method uses the ADDIE design which consists of 5 step, namely: analysis, design, development, implementation, and evaluation. This article will only report the first two stages namely analysis and design. The instrument used was a product needs analysis questionnaire and a practitioner validation sheet using a Likert scale. The data source of the needs analysis phase is high school students and physics teachers in Lampung Province. Product design validation was carried out by professional physics-teacher teachers with a Masters in Physics Education qualification. Where data is collected via Google Form and analyzed using descriptive qualitative. The results showed that multimeEdia to stimulate HOTS on bioenergy and wind energy was needed in the field. Multimedia which has the potential to stimulate HOTS on bioenergy and wind energy materials consists of videos and simulation of bioenergy and wind energy plants that contain all STEM.

scholarly journals Cubesat Antenna Analysis and Design: Are you using the right computational electromagnetic tool?

2021 ◽  
Vol 10 (2) ◽  
pp. 1-18
Author(s):  
I. Latachi ◽  
T. Rachidi ◽  
M. Karim
Keyword(s):  
Selection Process ◽  
Critical Role ◽  
Antenna System ◽  
Antenna Design ◽  
Design Processes ◽  
Analysis And Design ◽  
Trade Offs ◽  
Development Costs ◽  
Communication Links ◽  
The Right

Antenna systems play a critical role in establishing wireless communication links and sustaining remote sensing requirements for Cubesat applications. In addition to the usual antenna design requirements, Cubesat-based spacecrafts impose additional stringent constraints related to the on-board available space, power consumption and development costs. To develop optimal antenna prototypes while considering all these constraints and decrease trial and error related costs, computational electromagnetics (CEM) simulation tools are used. The accuracy of simulation results depends to a great extent on the choice of the appropriate CEM tool for the particular antenna problem to be analyzed; ergo, identifying and answering key questions about design objectives and requirements is necessary for informed decision-making throughout the selection and design processes. However, this could be quite challenging because of existing gaps both in the practitioners’ knowledge about different CEM tools capabilities, limitations, and design know-how. This is especially true for non-specialists such as students and academics involved in student driven Cubesat projects. Therefore, the rationale of this manuscript is to bridge those gaps and clarify some common misconception commonly encountered during the selection and design processes. In that regard, first, an overview of existing antenna configurations commonly used in Cubesat communications is provided. Next, antenna design general workflow is presented. Then, capabilities and limitations of different CEM solving methods are presented. After that, CEM software selection process trade-offs and possible sources of errors are discussed from a practical viewpoint. Finally, a case study of Masat-1 antenna system design is presented as practical example.

scholarly journals ZonaTIC: Sitio web para la divulgación de la ciencia de las TIC en pro de la inclusión digital

2019 ◽  
pp. 14-18
Author(s):  
Apolinar Trejo-Cuevas ◽  
Gerardo Parra-Rodríguez ◽  
María Teresa Díaz-Robledo ◽  
Javier Jesús Torres-Yáñez
Keyword(s):  
Information And Communication Technologies ◽  
Web Applications ◽  
Teaching Strategy ◽  
Project Based Learning ◽  
Design Development ◽  
Digital Inclusion ◽  
Analysis And Design ◽  
Information And Communication ◽  
Waterfall Model ◽  
The University

Objective. Implement a website that allows the outreach of the science of Information and Communication Technologies to the staff of the university community of the UTNG to facilitate digital inclusion, taking advantage of the current infrastructure that the university has, as well as its human capital. Methodology. The adopted development model was a concurrent model: For the Frontend development the spiral model was used, which facilitates its design through the stages of prototyping, analysis and design. On the other hand, for the development of the Backend, the waterfall model was used, given the nature of the project, where the requirements are pre-established and with few changes. The phases of this model are: (Requirements. Survey of requirements, Design. Development of the database and class diagrams, Implementation Coding, Check. Tests, Maintenance. Correct errors in functionality) Contribution. Implementation of project-based learning (PBL) as a motivational teaching strategy in the development of web applications. Use of robust development tools used today by software factories, such as: Java, Spring, HTML5, CSS3, and Apache Maven; all this under a Model View Controller architecture.

scholarly journals Fabien Girardin (English version)

Mosaic ◽  
2012 ◽  
Author(s):  
Paco González
Keyword(s):  
User Experience ◽  
Data Science ◽  
Research Practice ◽  
Design Development ◽  
English Version ◽  
Urban Informatics ◽  
Near Future

Fabien Girardin is a co-founder of the Near Future Laboratory a thinking, making, design, development and research practice speculating on the near future possibilities for digital worlds. He is active in the domains of user experience, data science and urban informatics.

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