scholarly journals Computational Design of a Magnetic Mirror

2021 ◽  
Vol 2114 (1) ◽  
pp. 012007
Author(s):  
Ahmad K. Ahmad ◽  
Hussain A. Waheeb ◽  
Hala F. Abass
Keyword(s):  
Computer Aided Design ◽  
Radial Displacement ◽  
Focal Length ◽  
Chromatic Aberration ◽  
Computational Design ◽  
Two Dimensions ◽  
Magnetic Mirror ◽  
Paraxial Ray ◽  
Aided Design ◽  
Magnetic Electron

Abstract A computer-aided design (CAD) has been carried out to investigate the properties of the magnetic electron mirror design. The work has been focused on suggesting a mathematical formula to represent the radial displacement. The function that has been taken into consideration was suggested to give rise to the mirror action. A numerical solution is carried out for solving the Paraxial-ray equation for determining the optical properties such as the focal length, the spherical and chromatic aberration coefficients and the excitation of the mirror. The pole shape of the mirror has been determined in two dimensions. In the present work, the profile of the mirror determined from the suggested trajectory is the single-pole types. The coefficients of the chromatic and spherical aberrations of the magnetic mirror are determined and normalized in terms of the focal length. The operational requirements are determining the choice of the mirror.

Dimensional Measurement of a Composite Ship Hull Using Coherent Laser Radar Yielding Submillimeter Results

2004 ◽  
Vol 20 (04) ◽  
pp. 232-239
Author(s):  
Steven D. Hand ◽  
David B. Ober ◽  
Bryan A. Bond ◽  
Edward A. Devine
Keyword(s):  
Computer Aided Design ◽  
Focal Length ◽  
Ship Hull ◽  
Laser Radar ◽  
Dimensional Measurement ◽  
Reinforced Plastic ◽  
Fiberglass Composite ◽  
Coherent Laser Radar ◽  
Composite Ship ◽  
Aided Design

The use and result of coherent laser radar as a noncontact method for the dimensional measurement of a ship hull is described. The hull, keel, and deck of a halfscale notional glass-reinforced plastic (fiberglass) composite hull test specimen are measured to submillimeter accuracy and then compared to the computer-aided design (CAD) model for conformance validation. Positives and negatives of this technology are the subject of this paper and include the high accuracy potential of the coherent laser radar, the minimal manpower requirements needed to achieve accurate results, and the limitation of the equipment's digital focal length and its effects on setup and data acquisition.

Of algorithms, buildings and fighter jets: a conversation with Robin Forrest

2017 ◽  
Vol 21 (1) ◽  
pp. 53-64 ◽  
Author(s):  
Daniel Cardoso Llach ◽  
Robin Forrest
Keyword(s):  
Computer Aided Design ◽  
Shape Representation ◽  
Computational Design ◽  
Software Systems ◽  
Important Place ◽  
Engineering Mathematics ◽  
Computer Aided ◽  
History Of ◽  
Aided Design ◽  
The University

A founding member of the Computer-Aided Design Group at the University of Cambridge, UK, and a student and collaborator of CAD pioneer Steven A. Coons at MIT, Robin Forrest occupies an important place in the history of computational design. Along with important contributions to the mathematics of shape representation, his coining of the term ‘computational geometry’ in 1971 offered a handle on design techniques that started to emerge – somewhat uncomfortably at first – in the interstices of engineering, mathematics, and the fledgling field of computer science. Initially fostered by governmentsponsored research into Computer-Aided Design for aircraft and car manufacturing, the methods he helped develop have since been encoded in countless commercial software systems for 3D modelling and simulation, helping structure the intellectual work – and the professional identity – of architects, engineers, and other practitioners of design.

scholarly journals A Comprehensive Computational Design for Microstrip Passive and Active Linear Circuits

1970 ◽  
Vol 1 (2) ◽  
Author(s):  
El-Sayed A. El-Badawy ◽  
S. H. Ibrahim
Keyword(s):  
Circuit Design ◽  
Computer Aided Design ◽  
Characteristic Impedance ◽  
Cutoff Frequency ◽  
Computational Design ◽  
High Gain ◽  
Microstrip Lines ◽  
Lange Coupler ◽  
Aided Design ◽  
Microstrip Circuit

In this paper, a complete program called HHSS2 is introduced which is a user-oriented program capable of designing linear active and passive microstrip circuits such as amplifiers, oscillators, mixers, lowpass filters, and couplers. The substrate parameters and the characteristic impedance of the microstrip lines are given to the program as a common statement. Examples for the design of a 3-GHz high gain amplifier, 2.6-GHz oscillator, ring coupler operated at 3.33 GHz, Lange coupler operated at 3.3 GHz, and maximally-flat lowpass filter operated at 2 GHz with 0.75 GHz cutoff frequency are introduced.    Key Words: Computational Microstrip Circuit Design, Microwave Circuits, Computer Aided Design.

Next Generation Parametric Design

2021 ◽  
Vol 62 (2) ◽  
pp. 153-166
Author(s):  
Jeroen L. Coenders
Keyword(s):  
Computer Aided Design ◽  
Parametric Design ◽  
Computational Design ◽  
Next Generation ◽  
Element Analysis ◽  
Building Information ◽  
History Of ◽  
Digital Knowledge ◽  
Aided Design ◽  
Associative Design

This paper presents a novel, next-generation, cloud-native parametric and associative platform for digital knowledge, services and automation, and the rationalisation behind the development of and the need for this platform in relation to the history of computational design and engineering, and the advantages and limitations of each step in this evolution: Computer Aided Design (CAD), Building Information Modelling (BIM), Finite Element Analysis (FEA), Parametric and Associative Design (PAD), Generative Design and programming approaches to design and engineering. The paper discusses some of the key functionalities in relation to why they are useful as a next step in the digital transformation of the Architecture, Engineering and Construction (AEC) industry. The paper concludes with some of the challenges for the near future of this platform.

scholarly journals Challenges and Status on Design and Computation for Emerging Additive Manufacturing Technologies

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Yuen-Shan Leung ◽  
Tsz-Ho Kwok ◽  
Xiangjia Li ◽  
Yang Yang ◽  
Charlie C. L. Wang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Computer Aided Design ◽  
Computational Design ◽  
Engineering Systems ◽  
Single Function ◽  
Single Scale ◽  
Wide Range ◽  
Design Objects ◽  
Manufacturing Technologies ◽  
Aided Design

The revolution of additive manufacturing (AM) has led to many opportunities in fabricating complex and novel products. The increase of printable materials and the emergence of novel fabrication processes continuously expand the possibility of engineering systems in which product components are no longer limited to be single material, single scale, or single function. In fact, a paradigm shift is taking place in industry from geometry-centered usage to supporting functional demands. Consequently, engineers are expected to resolve a wide range of complex and difficult problems related to functional design. Although a higher degree of design freedom beyond geometry has been enabled by AM, there are only very few computational design approaches in this new AM-enabled domain to design objects with tailored properties and functions. The objectives of this review paper are to provide an overview of recent additive manufacturing developments and current computer-aided design methodologies that can be applied to multimaterial, multiscale, multiform, and multifunctional AM technologies. The difficulties encountered in the computational design approaches are summarized and the future development needs are emphasized. In the paper, some present applications and future trends related to additive manufacturing technologies are also discussed.

scholarly journals Computational Design Thinking through Cellular Automata: Reflections from Design Studios

2020 ◽  
pp. 71-83
Author(s):  
Pınar Çalışır Adem ◽  
Gülen Çağdaş
Keyword(s):  
Cellular Automata ◽  
Computer Aided Design ◽  
Design Education ◽  
Design Thinking ◽  
Computational Design ◽  
Design Knowledge ◽  
Generative Process ◽  
Traditional Design ◽  
Definition Of ◽  
Aided Design

The current technologies have created a shift from Computer Aided Design to Computational Design in architecture. Computational design allows inquiries into what can be implicit knowledge in traditional design thinking, enables the definition of the mechanisms of design process and formulations of design knowledge and representation, and defines generative and evaluative knowledge. The purpose of this study is to discuss how Cellular Automata can be utilized in design studios to develop computational design thinking, through the examination of Frazer’s and Herr's studio works. After finding matching concepts and comparisons of Cellular Automata methods used in two design studios, the concept of ‘computation’ in Cellular Automaton studies and contributions of using this generative method in design studio will be discussed. In other words, this study will examine the content of Computational Design Thinking through Cellular Automata applications and their contributions to design education. As a result, since Cellular Automata methods are exploratory processes. They enhance seeing, reaching the whole from the parts, noticing the relationships and patterns between the parts and re-inventing them during and after the generative process. For these reasons, Cellular Automata have an important role in the development of computational design thinking in design studios with different concepts and setups.

scholarly journals Tailored Lace: Moldless Fabrication of 3D Bio-Composite Structures through an Integrative Design and Fabrication Process

2021 ◽  
Vol 11 (22) ◽  
pp. 10989
Author(s):  
August Lehrecke ◽  
Cody Tucker ◽  
Xiliu Yang ◽  
Piotr Baszynski ◽  
Hanaa Dahy
Keyword(s):  
Computer Aided Design ◽  
Composite Structures ◽  
Building Materials ◽  
Computational Design ◽  
Natural Fibre ◽  
Fabrication Process ◽  
Small Scale ◽  
Fibre Direction ◽  
Reinforced Polymers ◽  
Aided Design

This research demonstrates an integrative computational design and fabrication workflow for the production of surface-active fibre composites, which uses natural fibres, revitalises a traditional craft, and avoids the use of costly molds. Fibre-reinforced polymers (FRPs) are highly tunable building materials, which gain efficiency from fabrication techniques enabling controlled fibre direction and placement in tune with load-bearing requirements. These techniques have evolved closely with industrial textile processes. However, increased focus on automation within FRP fabrication processes have overlooked potential key benefits presented by some lesser-known traditional techniques of fibre arrangement. This research explores the process of traditional bobbin lace-making and applies it in a computer-aided design and fabrication process of a small-scale structural demonstrator in the form of a chair. The research exposes qualities that can expand the design space of FRPs, as well as speculates about the potential automation of the process. In addition, Natural Fibre-Reinforced Polymers (NFRP) are investigated as a sustainable and human-friendly alternative to more popular carbon and glass FRPs.

scholarly journals An open, integrated modular format: For flexible and intelligible architecture, engineering and construction design and production

2020 ◽  
pp. 147807712094379
Author(s):  
Robert Melvin Doe
Keyword(s):  
Computer Science ◽  
Computer Aided Design ◽  
Design Method ◽  
Computational Design ◽  
Construction Sector ◽  
Construction Design ◽  
Manufacturing Sectors ◽  
Computer Aided ◽  
Aided Design ◽  
Modular Format

The architecture, engineering and construction sector is fragmented, and its computer-aided design systems suffer data loss and errors in workflow between design and realisation. An open source, integrated, modular format is proposed to address the technological nature of these problems. Accordingly, this research updates the notion of the modular format as a more flexible and intelligible computational design method by leveraging knowledge from the computer science and manufacturing sectors where the design and realisation process is intentional and explicit. The research design of this article comprises a theoretical approach combined with an empirical case study. Principles of modularity are extracted from the computer science and manufacturing sectors to assist with a better definition of architecture, engineering and construction computer-aided design processes that use materials and resources more efficiently and sustainably. The methodology of the modular format contributes to the emerging concept of a building lifecycle management system for the architecture, engineering and construction sector.

Computer Aided Design of Non-toxic Antibacterial Peptides

2018 ◽  
Vol 18 (13) ◽  
pp. 1044-1052 ◽  
Author(s):  
Paola Rondon-Villarreal ◽  
Efrain Pinzon-Reyes
Keyword(s):  
Computer Aided Design ◽  
Pathogenic Bacteria ◽  
Antibacterial Agents ◽  
Computational Models ◽  
Computational Design ◽  
Antibacterial Peptides ◽  
Defense Proteins ◽  
New Antibiotics ◽  
Living Organisms ◽  
Aided Design

Antimicrobial resistance is increasing at an alarming rate and the number of new antibiotics developed and approved has decreased in the last decades, basically for economic and regulatory obstacles. Pathogenic bacteria that are resistant to multiple or all available antibiotics are isolated frequently. Hence, new antibacterial agents are urgently needed and antimicrobial peptides are being considered as a potential solution to this important threat. These molecules are small host defense proteins that are part of the immune systems of most living organisms such as plants, bacteria, invertebrates, vertebrates, and mammals. These peptides are found in those parts of organisms that are exposed to pathogens and they are active against multiple organisms such as virus, bacteria, and parasites, among others. This review shows different strategies in the computational design of new antibacterial peptides, the physicochemical properties that are considered as the most relevant for the antibacterial activity and toxicity, and it suggests guidelines in order to help in the finding of new non-toxic antibacterial peptides through the development of computational models.

Usability of contemporary tools for the computational design of architectural objects: Review, features evaluation and reflection

2017 ◽  
Vol 16 (1) ◽  
pp. 58-84 ◽  
Author(s):  
Maciej Nisztuk ◽  
Paweł B Myszkowski
Keyword(s):  
Computer Aided Design ◽  
Architectural Design ◽  
Computational Design ◽  
Point Of View ◽  
Floor Plan ◽  
Plan Generation ◽  
Current State ◽  
Floor Plans ◽  
Aided Design ◽  
Architectural Perspective

This article is an overview focused on functionality and usability of selected contemporary approaches for the computational floor plan generation of architectural objects. This article describes current solutions for generative architectural design and focuses on their usability from the point of view of architectural design practice. Recent research papers and prototypes, as well as the most important tools (selected computer-aided design and BIM software) for generative design from the architectural perspective, are described. The functionalities and level of usability of present-day software and prototypes are described. In addition, the descriptive review of the research prototypes architectural design outcomes is present. Furthermore, the survey among active architects regarding the usage of computational tools in the professional practice and possible guidelines for the development of such tools are present. This article summarises with the conclusion about the current state of generative floor plan design tools, the lack of fully functional and developed commercial tools of this type on the market and future directions for the development of generative floor plans tools.

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