CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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Hits 1 to 20 of 21

_id ecaade2014_221
id ecaade2014_221
authors Charles Avis
year 2014
title Shared Space Navigation
source Thompson, Emine Mine (ed.), Fusion - Proceedings of the 32nd eCAADe Conference - Volume 1, Department of Architecture and Built Environment, Faculty of Engineering and Environment, Newcastle upon Tyne, England, UK, 10-12 September 2014, pp. 173-179
summary Shared space is a concept of urban planning in which all barriers between cars and pedestrians, such as curbs and crosswalks, is removed to encourage heightened awareness of drivers and pedestrians, thus making city streets safer. The system has been highly successful, but can be highly stressful due to the lack of rules and signage. Thus, an adaptive feedback system that guides one safely through shared space could be essential for a shared space on the city scale. This paper imagines shared space at the city scale, and uses computational strategies to develop a system of adaptive collision-avoidance. By abstracting the movement of cars and pedestrians to properties of moving 'agents', collision detection and adaptive path finding models are developed, and then prototyped in an immersive environment that experiments with variable visual feedback based on user interactions.
wos WOS:000361384700017
keywords Shared space; movement; visual feedback; traffic; urban
series eCAADe
email cavis@princeton.edu
last changed 2016/05/16 09:08

_id ga0007
id ga0007
authors Coates, Paul and Miranda, Pablo
year 2000
title Swarm modelling. The use of Swarm Intelligence to generate architectural form
source International Conference on Generative Art
summary .neither the human purposes nor the architect's method are fully known in advance. Consequently, if this interpretation of the architectural problem situation is accepted, any problem-solving technique that relies on explicit problem definition, on distinct goal orientation, on data collection, or even on non-adaptive algorithms will distort the design process and the human purposes involved.' Stanford Anderson, "Problem-Solving and Problem-Worrying". The works concentrates in the use of the computer as a perceptive device, a sort of virtual hand or "sense", capable of prompting an environment. From a set of data that conforms the environment (in this case the geometrical representation of the form of the site) this perceptive device is capable of differentiating and generating distinct patterns in its behavior, patterns that an observer has to interpret as meaningful information. As Nicholas Negroponte explains referring to the project GROPE in his Architecture Machine: 'In contrast to describing criteria and asking the machine to generate physical form, this exercise focuses on generating criteria from physical form.' 'The onlooking human or architecture machine observes what is "interesting" by observing GROPE's behavior rather than by receiving the testimony that this or that is "interesting".' The swarm as a learning device. In this case the work implements a Swarm as a perceptive device. Swarms constitute a paradigm of parallel systems: a multitude of simple individuals aggregate in colonies or groups, giving rise to collaborative behaviors. The individual sensors can't learn, but the swarm as a system can evolve in to more stable states. These states generate distinct patterns, a result of the inner mechanics of the swarm and of the particularities of the environment. The dynamics of the system allows it to learn and adapt to the environment; information is stored in the speed of the sensors (the more collisions, the slower) that acts as a memory. The speed increases in the absence of collisions and so providing the system with the ability to forget, indispensable for differentiation of information and emergence of patterns. The swarm is both a perceptive and a spatial phenomenon. For being able to Interact with an environment an observer requires some sort of embodiment. In the case of the swarm, its algorithms for moving, collision detection, and swarm mechanics conform its perceptive body. The way this body interacts with its environment in the process of learning and differentiation of spatial patterns constitutes also a spatial phenomenon. The enactive space of the Swarm. Enaction, a concept developed by Maturana and Varela for the description of perception in biological terms, is the understanding of perception as the result of the structural coupling of an environment and an observer. Enaction does not address cognition in the currently conventional sense as an internal manipulation of extrinsic 'information' or 'signals', but as the relation between environment and observer and the blurring of their identities. Thus, the space generated by the swarm is an enactive space, a space without explicit description, and an invention of the swarm-environment structural coupling. If we consider a gestalt as 'Some property -such as roundness- common to a set of sense data and appreciated by organisms or artefacts' (Gordon Pask), the swarm is also able to differentiate space 'gestalts' or spaces of some characteristics, such as 'narrowness', or 'fluidness' etc. Implicit surfaces and the wrapping algorithm. One of the many ways of describing this space is through the use of implicit surfaces. An implicit surface may be imagined as an infinitesimally thin band of some measurable quantity such as color, density, temperature, pressure, etc. Thus, an implicit surface consists of those points in three-space that satisfy some particular requirement. This allows as to wrap the regions of space where a difference of quantity has been produced, enclosing the spaces in which some particular events in the history of the Swarm have occurred. The wrapping method allows complex topologies, such as manifoldness in one continuous surface. It is possible to transform the information generated by the swarm in to a landscape that is the result of the particular reading of the site by the swarm. Working in real time. Because of the complex nature of the machine, the only possible way to evaluate the resulting behavior is in real time. For this purpose specific applications had to be developed, using OpenGL for the Windows programming environment. The package consisted on translators from DXF format to a specific format used by these applications and viceversa, the Swarm "engine", a simulated parallel environment, and the Wrapping programs, to generate the implicit surfaces. Different versions of each had been produced, in different stages of development of the work.
series other
email p.s.coates@uel.ac.uk
more http://www.generativeart.com/
last changed 2003/08/07 15:25

_id acadia13_301
id acadia13_301
authors Dierichs, Karola; Menges, Achim
year 2013
title Aggregate Architecture: Simulation Models for Synthetic Non-convex Granulates
source ACADIA 13: Adaptive Architecture [Proceedings of the 33rd Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-926724-22-5] Cambridge 24-26 October, 2013), pp. 301-310
summary Aggregate Architectures challenge the common notion of architectural structures as being immutable, permanent and controllable. Aggregate Architectures are understood as material systems consisting of large masses of granules—designed or natural—interacting with each other only through loose, frictional contact. As a consequence, they take the realm of structural stability and architectural planning into entire re-configurability and into merely probable predictions of their prospective behavior. This renders them relevant within the paradigm of Adaptive Architecture.The challenge to the designer is to move away from thinking in terms of clearly defined local and global assembly systems and to acquire tools and modes of design that allow for observation and interaction with the evolving granular architectures. In this context, the focus of the presented researchproject is on the relevance of mathematically based simulations as tools of investigation and design.The paper introduces the field of Aggregate Architectures. Consequently experimental and simulation methods for granulates will be outlined and compared. Different modeling and collision-detection methods for non-convex particles are shown and applied in benchmarking simulations for a full-scale architectural prototype. The potential for micro-mechanical simulation analysis within architectural applications are demonstrated and further areas of research outlined.
keywords Tools and Interfaces; aggregate architecture, designed granular matter, discrete element modeling, non-convex particles
series ACADIA
type Normal Paper
email karola.dierichs@icd.uni-stuttgart.de
last changed 2014/01/11 08:13

_id caadria2019_332
id caadria2019_332
authors Dwivedi, Urvashi, Porcellini, Valentin, Hong, Sukjoo, Chang, Zhuming and Lee, Ji-Hyun
year 2019
title Computing Spatial Features to Allocate Collision-free Motion-paths for Tele-presence Avatars
source M. Haeusler, M. A. Schnabel, T. Fukuda (eds.), Intelligent & Informed - Proceedings of the 24th CAADRIA Conference - Volume 1, Victoria University of Wellington, Wellington, New Zealand, 15-18 April 2019, pp. 245-254
summary Recently, indoor-intelligent services like "Tele-presence" have made quite an advancement. Therefore, to completely 1) understand the diverse indoor environment, 2) efficiently calculate similarity for semantic spaces and 3) for defining an efficient path movement for an augmented reality-based Avatar; we propose spatial features computation, graphical representation and Topology-based graph-similarity measure for complex domains to overcome the limited visibility of an Avatar. Thus, collision with the surrounding objects in a given indoor-space can be avoided. This study begins by securing spatial features of objects, e.g., furniture, doorways, etc., of an indoor environment from an FBSMAP (Function-Behaviour-Structure Map). Then, we establish a method for defining similarity for locations and paths.
keywords Tele-presence Avatar; Activity space; Topology; Spatial similarity; Similarity measure; Cell; Field of view.
series CAADRIA
email urv892@gmail.com
last changed 2019/04/16 08:22

_id ec0e
authors Engeli, M. and Kurmann, D.
year 1996
title A Virtual Reality Design Environment with Intelligent Objects and Autonomous Agents
source H.J.P. Timmermans (ed.), Design and Decision Support Systems in Architecture and Urban Planning Conference, Vol. 1: Architecture Proceedings, pp. 132-142
summary New technological achievements and research results allow for the creation of innovative design tools for architects, that do not originate from paper-based paradigms but instead make optimised use of the present technology and programming concepts. The core of our system is comprised of an intuitive interactive modelling tool. It runs in a virtual reality set-up, where the user can use 3D glasses to experience rooms and 3D input devices to model in three dimensions. The interface is free from widget-like buttons or menus, so that the user is undisturbed when moving into the virtual world of the design. The system can also run in a distributed fashion, so that a number of users can look at and modify the same design. The 3D model can be generated in a sketch-like fashion using solids and voids, void modelling turns out to be very valuable for architectural design. The objects in this system can contain forms of intelligence to produce such behaviour as: falling because of gravity, collision avoidance, and autonomous motion. Interactive behaviour can also be assigned to the objects. Autonomous Agents are added to the system to enhance the designer support. These are agents that enhance the virtual environment, agents that take over tasks, and agents that help to test the design. The system shows new interface and interaction approaches that support the architectural design process intelligently.
series other
last changed 2003/04/23 13:50

_id ddssar9609
id ddssar9609
authors Engeli, Maia and Kurmann, David
year 1996
title A Virtual Reality Design Environment with Intelligent Objects and Autonomous Agents
source Timmermans, Harry (Ed.), Third Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings (Spa, Belgium), August 18-21, 1996
summary New technological achievements and research results allow for the creation of innovative design tools for architects, that do not originate from paper-based paradigms but instead make optimised use of the present technology and programming concepts. The core of our system is comprised of an intuitive interactive modelling tool. It runs in a virtual reality set-up, where the user can use 3D glasses to expe-rience rooms and 31) input devices to model in three dimensions. The interface is free from widget-like buttons or menus, so that the user is undisturbed when moving into the virtual world of the design. The system can also run in a distributed fashion, so that a number of users can look at and modify the same design. The 31) model can be generated in a sketch-like fashion using solids and voids, void modelling turns out to be very valuable for architectural design. The objects in this system can contain forms of intelligence to produce such behaviour as: falling because of gravity, collision avoidance, and autonomous motion. Interactive behaviour can also be assigned to the objects. Autonomous Agents are added to the system to enhance the designer support. These are agents that enhance the virtual environment, agents that take over tasks, and agents that help to test the design. The system shows new interface and interaction approaches that support the architectural design process intelligently.
series DDSS
last changed 2003/08/07 14:36

_id 4a53
authors Faltings, Boi
year 2001
title Qualitative Spatial Reasoning Based on Algebraic Topology
source J. S. Gero, B. Tversky and T. Purcell (eds), 2001, Visual and Spatial Reasoning in Design, II - Key Centre of Design Computing and Cognition, University of Sydney, Australia
summary Several formalisms have been proposed for qualitativereasoning about regions and their topological relations in space. Theseformalisms, based on pairwise relations, do not allow sufficientlypowerful inferences to be used for spatial reasoning tasks such asplanning a collision-free path. In this paper, I show how consideringrelations between region triples, much more powerful reasoningtechniques become possible. I show in particular that in twodimensions, purely topological reasoning is sufficient to compute aminimal place graph which represents all minimal and maximal regioncombinations, as well as all minimal paths between them. I illustratehow this could be applied to motion planning, showing that in spite ofits qualitative nature, the formalism is powerful enough to solveproblems of practical interest.
series other
email faltings@iconomic.com
more http://www.arch.usyd.edu.au/kcdc/conferences/vr01/
last changed 2003/05/02 09:14

_id ddssup0207
id ddssup0207
authors Geurts, K., Wets, G., Brijs, T. and Vanhoof, K.
year 2002
title The Use of Rule-Based Knowledge Discovery Techniques to Profile Black Spots
source Timmermans, Harry (Ed.), Sixth Design and Decision Support Systems in Architecture and Urban Planning - Part two: Urban Planning Proceedings Avegoor, the Netherlands), 2002
summary In Belgium, traffic safety is currently one of the highest topics on the list of priorities of the government. The identification of black spots and black zones and profiling them in terms of accident related data and location characteristics must provide new insights into the complexity and causes of road accidents which, in turn, provide valuable input for government actions. Data mining is the extraction of information from large amounts of data. The use of data mining algorithms is therefore particularly useful in the context of large datasets on road accidents. In this paper, association rules are used to identify accident circumstances that frequently occur together. The strength of this descriptive approach lies within the definition of different accident types and the identification of relevantvariables that make a strong contribution towards a better understanding of accident circumstances. An analysis of the produced set of rules, describing underlying patterns in the data, indicates that fiveaspects of traffic accidents can be discerned: collision with a pedestrian, collision in parallel, sideways collision, week/weekend accidents and weather conditions. For each of these accident types, different variables play an important role in the occurrence of the accidents.
series DDSS
type normal paper
last changed 2008/11/01 06:38

_id cf2013_295
id cf2013_295
authors Markova, Stanimira; Christoph Langenhan, Peter Russell, and Frank Petzold
year 2013
title Building Elements Re-usability Optimization - Design Decision Support Using a Case-Base of Building Information Models and Semantic Fingerprints
source Global Design and Local Materialization[Proceedings of the 15th International Conference on Computer Aided Architectural Design Futures / ISBN 978-3-642-38973-3] Shanghai, China, July 3-5, 2013, pp. 295-305.
summary The complexity of the requirements on buildings is continuously increasing and thus, often confronting designers with interdisciplinary problems, reaching far beyond the traditional challenges and methods of architecture and engineering. Moreover, designers are often required to take decisions, when most of the information and knowledge is still missing or to be generated. In the context of sustainable building design, the re-usability of building elements and the optimisation for exchangeability is crucial for the achievement of two of the main goals: efficient use of material resources and waste reduction. The scope of this work in progress is describing requirements for case-based decision support in order to optimise building element re-usability, create an analysis of explicit re-usability indicators (e.g. “connection liberation”, “modularity” or “life span collision”) and to identify retrieval strategies. A proposal to support decision making processes by retrieving existing design solutions graph representations as well as the use of building information models are also described.
keywords case-based reasoning, sustainable design, early design stage support, building information modelling
series CAAD Futures
email langenhan@ai.ar.tum.de
last changed 2014/03/24 06:08

_id ijac20075205
id ijac20075205
authors Moustakas, Konstantinos; Tzovaras, Dimitrios; Nikolakis, Georgios
year 2007
title Simulating the Use of Ancient Technology Works Using Advanced Virtual Reality Technologies
source International Journal of Architectural Computing vol. 5 - no. 2, pp. 256-282
summary This paper introduces a novel framework for the modeling and interactive simulation of ancient Greek technology works with the use of advanced virtual reality technologies. A novel algorithm is introduced for the realistic and efficient resolution of collisions that is based on an advanced collision detection approach that can also calculate in real-time the force that should be fed back to the user using a haptic device. Thus, the user is capable of manipulating the scene objects in the environment using haptic devices to simulate the sense of touch and stereoscopic imaging so as to be immersed in the virtual environment. Moreover, the virtual hand that simulates the user's hand is modeled using superquadrics so as to further increase the speed of the simulation and the fidelity of the force feedback. Extended evaluation of the system has been performed with visitors of the Science Center and Technology Museum of Thessaloniki.
series journal
last changed 2007/08/29 14:23

_id sigradi2012_76
id sigradi2012_76
authors Oliveira, Wagner Costa; Heidrich, Felipe Etchegaray
year 2012
title Representação de Ambiente Arquitetônico com Tecnologia de Jogos Digitais: uma análise da modelagem geométrica [Architectural Environment Representation with Digital Games Technology: an Analysis of Geometric Modeling Techniques]
source SIGraDi 2012 [Proceedings of the 16th Iberoamerican Congress of Digital Graphics] Brasil - Fortaleza 13-16 November 2012, pp. 440-443
summary This paper aims to describe part of a study about the visualization of architectural designs through digital interactive environments generated with gaming technology. Thus, this text reports the analyses concerning the geometrical modeling procedures of an architectural environment specifically for this usage. The experiment consisted in using a modeling software to create one object using several different techniques, to analyze the number of polygons, the behavior of the surface normals, the stability of the geometries and collision behavior for each one of the objects, in the digital environment.
keywords Modelagem Geométrica, Ambientes Digitais Interativos, Motor de Jogos Digitais
series SIGRADI
email wenver@gmail.com
last changed 2016/03/10 08:56

_id ddss9472
id ddss9472
authors Park, Mungo
year 1994
title Text, Model, Image, the Inconsistent Cycle of Reflective Design in Architectural Speculation
source Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary The paper will examine the sites of imaginal or creative 'events' set within the discourse of architecture and landscape design. It will discuss the cognitive and reflective actions implicit in creating or opening up the spaces of thinking in design. Notions of 'linearity' and 'intuition' in the emergence of discursive design work will be tested with reference to the textual work of Barthes, Foucault and Baudrillard, and to the imaginal work of Lebbeus Woods, Piranesi and Daniel Liebeskind. The potential for relocating terms and collapsing conventional disciplinary boundaries to discover a creative field of discourse within architectural design will be discussed, together with the specific tactics and strategies which may be employed by the designer to achieve such a collision in the problematizing of a design project. Ideas of reality, simulation and materiality will be discussed in the context of the designer's external frames of reference (societal, ecological, political, aesthetic, cultural) and their possible relationship with the cognitive process in order to discover the terms under which an architectural discourse seeks validation.
series DDSS
last changed 2003/12/21 06:38

_id 8f16
authors Pizarro, D.V., Price, D.L. and Beliveau, Y.J.
year 1997
title Auditory collision warning signals for crane operation
source Automation in Construction 5 (6) (1997) pp. 445-457
summary This study examined the effect that an auditory collision warning signal's pulse rate, pulse pattern, and onset distance had on subject braking responses in a simulated crane/overhead power line collision scenario. The experimental warning signal alerted subjects of their proximity to overhead power lines. The experimental taks required subjects to monitor a simulated auditory collision warning signal while simultaneously operating a single-axis driving simulation task. The driving task simulated an actual crane operator's mental workload required to navigate a crane and manipulate various loads. Subjects were required to initiate braking responses based on the information conveyed solely through the auditory collision warning system. No visual information was provided to the subjects to isolate the effects of the warning signal. Subjective ratings of the auditory warning signals were obtained to compare subjects' actual performance using the warning signal versus their subjective preferences. Results indicate that subjects were able to initiate appropriate braking responses while using an auditory collision warning signal with moderate onset distances and low pulse rates. The auditory pulse pattern did not have a large impact on subjects' braking responses except at extremely short onset distances. Overall, it was concluded that a pulsing auditory warning signal comprised of a moderate onset distance and low pulse rate could work effectively as a proximity warning device for mobile cranes.
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 19:23

_id 84e6
authors Seebohm, Thomas
year 1995
title A Response to William J. Mitchell's review of Possible Palladian Villas, by George Hersey and Richard Freedman, MIT Press, 1992
source AA Files ( Journal of the Architectural Association School of Architecture), No. 30, Autumn, 1995, pp. 109 - 111
summary A review by William J. Mitchell, entitled 'Franchising Architectural Styles", appeared in AA Files no. 26 (Autumn 1993). It reflects on a collision between two fundamentally opposing points of view, one held by the reviewer, the other by the reviewed. These determine our expectations of the role of computers in architectural design.

series journal paper
email tseebohm@fes.uwaterloo.ca
last changed 2003/05/15 19:45

_id 9
authors Stipech, Alfredo
year 1998
title Un Nuevo Horizonte Arquitectonico, Productivo e Intelectual (A New Architectural, Productive and Intelectual Horizon)
source II Seminario Iberoamericano de Grafico Digital [SIGRADI Conference Proceedings / ISBN 978-97190-0-X] Mar del Plata (Argentina) 9-11 september 1998, pp. 76-83
summary This work presents the pedagogical experience of a Design Workshop that investigated the impact of the digital and analogic means on the architectonic design process This work was based on the research of Dr. Arch. Julio BermÝdez who also directed this workshop in 1997. This class was part of the Training Program organized by the "Centro de Informatica y Diseho" (CID) at the "Universidad Nacional del Litoral" FADU (Facultad de Arquitectura Diseho y Urbanismo) Santa Fe, Argentina and made possible by the ongoing International Program of Academic Exchange between the FADU and the (University of Utah Graduate School of Architecture (IPAE Project NO 4). The experimental studio utilized an architectural problem to study the procedural, technical, interpretative and theoretical issues associated with the relationship of contemporary media and design process. The pedagogical vehicle was a program that expresses in itself the meeting or collision between two cultures competing for dominance at the end of the millennium: the immemorial material culture (corporeal, tectonic) and the new and everyday more influent virtual culture (information, nets, media, simulation). The premise for the design process, communication and criticism was the constant migration between the digital and analog representation systems. Within this theoretical-practical context semantic aspects containing different representation modalities were used such as physical and electronic models along with systematic and sensitive drawings (manuals, pixels and with CAD). Hybrid interfaces took a leading role in the process since they allowed the communication between analog and digital media through the creative and technical interaction between scanner, video and computer. This architectural and media context generated an intense pedagogic environment fostering the development of creativity and a critical attitude while allowing concrete breakthroughs in the teaching process and format design. Our work reflects on these results showing examples of stud-go works and providing a final evaluation of this unique experience in Argentina.
series SIGRADI
email arqasoc@satlink.com
last changed 2016/03/10 09:01

_id 9748
authors Trikac, S.N., Banerjeea, P. and Kashyapb, R.L.
year 1997
title Virtual reality interfaces for feature-based computer-aided design systems
source Computer-Aided Design, Vol. 29 (8) (1997) pp. 565-574
summary A computer-aided design (CAD) system with a virtual reality (VR) interface simplifies the design of complex mechanical parts. To add a design feature (e.g., a hole,slot, or protrusion), the designer can navigate in the part to the appropriate face of the part where he/she wishes to attach the feature, and sketch directly on that face.Besides convenience, this method of feature specification implicitly enforces feature accessibility constraints, and also provides hints to the process-planner regardingthe order in which the features may be manufactured. We detail the design of a VR-based prototype CAD system. The system maintains the knowledge of part cavitiesand their adjacencies, and a triangulated boundary-representation of an approximating polyhedron. We present incremental provably correct algorithms for updatingthis representation as the user edits the part. We also show how this representation supports real-time displays, navigation, and collision detection. The user-interfaceof the CAD system relies on these capabilities to provide the above-mentioned advantages.
keywords User Interfaces, Virtual Reality, Feature-Based Design, Geometric Reasoning, Feature Extraction
series journal paper
last changed 2003/05/15 19:33

_id 6c0a
authors Tserng, H. Ping, Ran, Bin and Russell, Jeffrey S.
year 2000
title Interactive path planning for multi-equipment landfill operations
source Automation in Construction 10 (1) (2000) pp. 155-168
summary A methodology and several algorithms for interactive motion planning are developed for multi-equipment landfill operations in an automated landfill system (ALS). A system for establishing ALS is also proposed in the paper. To develop a multi-truck/multi-compactor ALS, the major problems can be classified into three principal categories: (1) navigation system for multiple devices, (2) job-site geometric model, and (3) instantaneous motion planning and control system for equipment in the work site. To solve the problems from the three categories, this paper will present a methodology to simulate the operational processes of landfill vehicles and equipment in pre-planning a landfill project as well as finding efficient and collision-free motion patterns to control autonomous landfill equipment during the construction phase. Furthermore, by linking this system to a global positioning system (GPS), the efficient traffic routing and collision-free path for each piece of equipment can be calculated by using real-time positional data acquisition in a 3-D geometric model of a landfill site.
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 19:23

_id bfec
authors Tserng, H.P., Ran, B. and Russell, J.S.
year 2001
title Erratum to ""Interactive path planning for multi-equipment landfill operations"" [Autom. Constr. 10 (2000) 155-168]"
source Automation in Construction 10 (4) (2001) pp. 541-541
summary A methodology and several algorithms for interactive motion planning are developed for multi-equipment landfill operations in an automated landfill system (ALS). A system for establishing ALS is also proposed in the paper. To develop a multi-truck/multi-compactor ALS, the major problems can he classified into three principal categories: (1) navigation system for multiple devices, (2) job-site geometric model, and (3) instantaneous motion planning and control system for equipment in the work site. To solve the problems from the three categories, this paper will present a methodology to simulate the operational processes of landfill vehicles and equipment in pre-planning a landfill project as well as finding efficient and collision-free motion patterns to control autonomous landfill equipment during the construction phase. Furthermore, by linking this system to a global positioning system (GPS), the efficient traffic routing and collision-free path for each piece of equipment can he calculated by using real-time positional data acquisition in a 3-D geometric model of a landfill site.
keywords Multi-equipment landfill operations; Automated landfill system; Global positioning system
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/06/02 07:33

_id 8fd8
authors Watt, Alan
year 1993
title 3D Computer graphics
source Addison-Wesley, pp, 1-13
summary The third edition of Alan Watt's 3D Computer Graphics, a bible of computer graphics, includes a CD-ROM full of examples and updated information on graphics and rendering algorithms. The book discusses many of the techniques that have evolved in the seven years since the previous edition was published. 3D Computer Graphics is a textbook, and it's designed for serious programmers creating graphics applications (not end users). Over the course of 16 sections, Watt introduces the concepts and implementation of computer imaging, from "Mathematical Fundamentals of Computer Graphics" to "Representation and Rendering" and ending with "Image-Based Rendering and Photo-Modeling." The last section, devoted to computer animation, includes methods for linked structures, collision detection, and particle animation (to name a few). Although the topics are sometimes hard to grasp, Mr. Watt writes clearly and concisely, making generous use of diagrams to help convey the principles described in the text. The accompanying CD-ROM includes over a dozen studies of computer graphics techniques and rendering algorithms. Presented in HTML, the exhaustive studies, each with a matrix of thumbnails, demonstrates the varied achievable results. One minor complaint here: although the thumbnails can be clicked to view a much larger image, the larger versions come in .tif format, which few (if any) Web browsers can view. Users will need another application to view them. Having the large image in .jpg format would have enabled the reader to view it in the already-open Web browser.
series other
last changed 2003/04/23 13:14

_id acadia16_298
id acadia16_298
authors Yu, Lei; Huang, Yijiang; Zhongyuan, Liu; Xiao, Sai; Liu, Ligang; Song, Guoxian; Wang, Yanxin
year 2016
title Highly Informed Robotic 3D Printed Polygon Mesh: A Nobel Strategy of 3D Spatial Printing
source ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 298-307
summary Though robotic 3D printing technology is currently undergoing rapid development, most of the research and experiments are still based on a bottom up layering process. This paper addresses long term research into a robotic 3D printed polygon mesh whose struts are directly built up and joined together as rapidly generated physical wireframes. This paper presents a novel “multi-threaded” robotic extruder, as well as a technical strategy to create a “printable” polygon mesh that is collision-free during robotic operation. Compared to standard 3D printing, architectural applications demand much larger dimensions at human scale, geometrically lower resolution and faster production speed. Taking these features into consideration, 3D printed frameworks have huge potential in the building industry by combining robot arm technology together with FDM 3D printing technology. Currently, this methodology of rapid prototyping could potentially be applied on pre-fabricated building components, especially ones with uniform parabolic features. Owing to the mechanical features of the robot arm, the most crucial challenge of this research is the consistency of non-stop automated control. Here, an algorithm is employed not only to predict and solve problems, but also to optimize for a highly efficient construction process in coordination of the robotic 3D printing system. Since every stroke of the wireframe contains many parameters and calculations in order to reflect its native organization and structure, this robotic 3D printing process requires processing an intensive amount of data in the back stage.
keywords interdisciplinary design, craft in design computation, digital fabrication
series ACADIA
type paper
email asworkshop@vip.163.com
last changed 2016/10/24 11:12

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