Cumincad : CUMINCAD Papers : Search Results

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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_id	dc71
authors	Liggett, R., Friedmann, S. and Jepson, W.
year	1995
title	Interactive Design/Decision Making in a Virtual Urban World: Visual Simulation and GIS
source	Proceedings of the Fifteenth 1995 ESRI User Conference, Palm Springs, CA, May, 1995
summary	Researchers at UCLA have developed an Urban Simulator which links virtual reality technology with traditional two-dimensional Geographic Information Systems (GIS) and databases. This paper discusses the data structure and interface requirements necessary to integrate a real-time three-dimensional visual simulation system with a GIS system. Potential uses of the integrated system are illustrated with a set of current projects in the Los Angeles area.
keywords	3D City Modeling, Development Control, Design Control
series	other
more	http://www.aud.ucla.edu/%7Erobin/esripaper/p308.html
last changed	2003/02/24 10:56

_id	a2e6
authors	Liggett, R.S., Mitchell, W.J. and Tan, M.
year	1992
title	Multi-Level Analysis and Optimization of Design
source	New York: John Wiley & Sons, 1992. pp. 2512-269 : ill. includes bibliography
summary	This paper discusses a knowledge-based computer-aided design system, that provides multi-level analysis capabilities, and that automatically propagates constraints on design variables from level to level. It also Supports formulation and solution of optimization problems at different levels, so that a solution can be approached by solving a sequence of appropriately constrained sub-optimization problems. Theory and implementation are discussed, and a detailed case study of application to the design of small house plans is provided
keywords	constraints, design, methods, knowledge base, CAD, systems, analysis, optimization, automation, user interface, shape grammars
series	CADline
email
last changed	2003/06/02 14:41

_id	ddss9462
id	ddss9462
authors	Liggett, Robert S. and Jepson, William H.
year	1994
title	Implementing an Integrated Environment for Urban Simulation CAD, Visualization and GIS
source	Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary	Using technology which has been adapted from military flight simulation hardware and software, researchers at UCLA's Graduate School of Architecture and Urban Planning are currently developing an integrated computing environment for Urban Simulation which includes a high-level visual simulation package, an industry standard CAD system, and a traditional two dimensional geographic information system and data bases. The focal point of the integrated system is a visual simulation engine which has been developed using Silicon Graphics' IRIS Performer application development environment. With this system, aerial photographs can be combined with street level video to efficiently create a realistic (down to plants, street signs and the graffiti on the walls) model of an urban neighbourhood which can then be used for interactive fly and walk-through demonstrations. Links have been established between this visual simulation system and AutoCAD to allow models (at varying levels of detail) to be generated using the CAD system and translated into the form required for the visualization system. Links between the GIS system (in this case ARC/INFO and ARCVIEW) and the visual simulation system provide the capability for dynamic query and display of information from the GIS data base in a real-time 3-dimensional format. Links between the CAD and GIS systems allow common base maps to be used for the GIS and modelling systems as well as automatic generation of 3-d form. While an earlier paper by the authors discussed proposed strategies for such an Urban Simulation System, this paper focuses on the results of actual implementation of these strategies, as well as the use of the system for modelling, exploration and display of alternative physical environments.
series	DDSS
email
last changed	2003/08/07 16:36

_id	a88f
authors	Liggett, Robin , Jepson, William and Teodosiadis, Stephen
year	1991
title	A Stratified Approach to the Integration of Low Cost Modelling with Advanced Technology Rendering
source	Computer Aided Architectural Design Futures: Education, Research, Applications [CAAD Futures ‘91 Conference Proceedings / ISBN 3-528-08821-4] Zürich (Switzerland), July 1991, pp. 105-120
summary	This paper presents a stratified approach to the integration of low cost modeling software (such as AutoCAD) with advanced workstation based rendering systems (such as Wavefront and the Silicon Graphics radiosity renderer). Powerful extensions to the basic modeling system are introduced which greatly reduce the required design effort, while significantly increasing the efficiency of the rendering software.
series	CAAD Futures
last changed	1999/04/07 12:03

_id	eb7b
authors	Liggett, Robin S.
year	1980
title	The Quadratic Assignment problem: an Analysis of Applications and Solution Strategies
source	Environment and Planning B. 1980. vol. 7: pp. 141-162 : tables. includes bibliography
summary	A wide variety of practical problem in design, planning and management can be formulated as quadratic assignment problems, and this paper discusses this class of problem. Since algorithms for producing optimal solutions to such problems are computationally infeasible for all but small problems of this type, heuristic techniques must usually be employed for the solution of real practical problems. This paper explores and compares a variety of solution techniques found in the literature considering the trade-offs between computational efficiency and quality of solutions generated. Recommendations are made about the key factors to be considered in developing and applying heuristic solution procedures
keywords	design process, algorithms, graphs, quadratic assignment, operations research, optimization, automation, synthesis, heuristics, space allocation, floor plans, management, planning
series	CADline
email
last changed	2003/06/02 13:58

_id	b76e
authors	Liggett, Robin S.
year	2000
title	Automated facilities layout: past, present and future
source	Automation in Construction 9 (2) (2000) pp. 197-215
summary	This paper reviews the history of automated facility layout, focusing particularly on a set of techniques which optimize a single objective function. Applications of algorithms to a variety of space allocation problems are presented and evaluated. Guidelines for future implementations of commercial systems are suggested.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	ecaade2015_253
id	ecaade2015_253
authors	Ligler, Heather and Economou, Athanassios
year	2015
title	Entelechy I - Towards a Formal Specification of John Portman's Domestic Architecture
doi	https://doi.org/10.52842/conf.ecaade.2015.1.445
source	Martens, B, Wurzer, G, Grasl T, Lorenz, WE and Schaffranek, R (eds.), Real Time - Proceedings of the 33rd eCAADe Conference - Volume 1, Vienna University of Technology, Vienna, Austria, 16-18 September 2015, pp. 445-452
summary	John Portman's work attracts much interest, although little scholarship exists that directly engages his contribution in formal composition. Most of the discussion of Portman's architecture tends to focus on his commercial work and hotels, although a key to understanding his work is found in his personal domestic projects where he has had the freedom to explore his architectural ideas. This study focuses on his first residence, Entelechy I, to begin outlining his design principles formally. The ambition is to open up the whole question of his architectural contribution in the United States and at large.
wos	WOS:000372317300048
series	eCAADe
email
last changed	2022/06/07 07:59

_id	sigradi2015_11.165
id	sigradi2015_11.165
authors	Ligler, Heather; Economou, Thanos
year	2015
title	Lost in Translation: Towards an Automated Description of John Portman’s Domestic Architecture
source	SIGRADI 2015 [Proceedings of the 19th Conference of the Iberoamerican Society of Digital Graphics - vol. 2 - ISBN: 978-85-8039-133-6] Florianópolis, SC, Brasil 23-27 November 2015, pp. 657-661.
summary	The prevalent mode of shape grammar output is a two-dimensional drawing grammar. For architectural applications, these two- dimensional shape rules can hold a variety of interpretations in three-dimensional space. This work translates an existing grammar from a manual two-dimensional drawing grammar to an automated three-dimensional building grammar to explore the challenges and opportunities that this translation suggests in the larger context of shape computation. The case study considered here is a grammar interpreting John Portman’s architectural language as defined by the house Portman identifies as emblematic of his design principles, his 1964 personal residence Entelechy I.
keywords	Shape Grammars, Shape Grammar Implementations, Formal Composition, Generative Systems
series	SIGRADI
email
last changed	2016/03/10 09:54

_id	acadia12_97
id	acadia12_97
authors	Lilley, Brian ; Hudson, Roland ; Plucknett, Kevin ; Macdonald, Rory ; Cheng, Nancy Yen-Wen ; Nielsen, Stig Anton ; Nouska, Olympia ; Grinbergs, Monika ; Andematten, Stephen ; Baumgardner, Kyle ; Blackman, Clayton ; Kennedy, Matthew ; Chatinthu, Monthira ; Tianchen, Dai ; Sheng-Fu, Chen
year	2012
title	Ceramic Perspiration: Multi-Scalar Development of Ceramic Material
doi	https://doi.org/10.52842/conf.acadia.2012.097
source	ACADIA 12: Synthetic Digital Ecologies [Proceedings of the 32nd Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-62407-267-3] San Francisco 18-21 October, 2012), pp. 97-108
summary	Ceramic building material is a useful passive modulator of the environment. The subject area is based on traditional cultural and material knowledge of clay properties: from amphora to rammed earth building; and ranges to present uses: from desiccants and space shuttle tile patterns to bio-ceramics. The primary consideration is to control material density and porosity in a tile component, in response to specific environmental conditions. This depends on a number of key physical principles: the ability of the material to absorb thermal energy, the ability to absorb and then ‘wick’ moisture within the pore structure, and the decrement factor or ‘time lag’ of the effect. The interplay between these properties point to the importance of directionality in the porous microstructure, at the boundary layer. Material characteristics have been investigated in the laboratory at a micron scale and in the ceramics workshop at full scale, with some interplay between the two. Recent work done on monitoring has led to the development of software tools that allow feedback (approaching real time)- a visual representation of the dynamic thermal and hygrometric properties involved.
keywords	Synthetic tectonics , composite materials , smart assemblies , emerging material processes , Responsive environments , sensing , real-time computation , feedback loops , Information Visualization
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:59

_id	ecaade2021_059
id	ecaade2021_059
authors	Lim, Ariel Cheng Sin and Thomsen, Mette Ramsgaard
year	2021
title	Multi-Material Fabrication for Biodegradable Structures - Enabling the printing of porous mycelium composite structures
doi	https://doi.org/10.52842/conf.ecaade.2021.1.085
source	Stojakovic, V and Tepavcevic, B (eds.), Towards a new, configurable architecture - Proceedings of the 39th eCAADe Conference - Volume 1, University of Novi Sad, Novi Sad, Serbia, 8-10 September 2021, pp. 85-94
summary	Our awareness of the earth's depleting resources has directed focus towards biomaterials, which can be extracted sustainably and biodegraded after use. Current fabrication of biomaterial structures is still restricted in strength and geometry, limiting its use in construction. This paper presents a novel two-phase multi-material fabrication process to create mycelium composite structures of higher porosity and complexity with speculated improvements in strength. First, cellulose pulp inoculated with mycelium is extruded. Then, each layer is filled by a secondary supporting material. This material, in the form of a gravel- and sand-slurry, acts as an inhospitable medium steering mycelial growth, additionally improving aeration to produce stronger structures. After an intermediate growth period, the secondary material, reusable in a closed-loop production model, is removed to reveal the fully-grown mycelium structure. The paper reports on each of the three aspects: the fabrication process, material experimentation of primary and secondary substrates, as well as geometry of varying porosity and performance.
keywords	biomaterials; mycelium; biodegradable structures; robotic fabrication; additive manufacturing
series	eCAADe
email
last changed	2022/06/07 07:59

_id	acadia03_051
id	acadia03_051
authors	Lim, Chor-Kheng
year	2003
title	G Pen: An Intelligent Designer’s Playmate
doi	https://doi.org/10.52842/conf.acadia.2003.403
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 403-409
summary	In the field of design the pen-based system is a newly developed computer interface that provides the designer with the convenience of a pen in freehand sketches. But these pen-based systems only focus on an interface familiar to the designers and the application of the hardware and software that go with it, treating the pen only as a mouse-like input device. As pen and pad are devices for the pen-based system, the hope is that they can be endowed with more intelligent characteristics to let them interact with designer’s gestures and become a creative source for the designers, while simultaneously preventing the design fixation encountered by designers during design process. This research utilizes the unintentional hand gestures made by designers, such as the designer’s grip of the pen or movement involved in playing with the pen, putting it down, knocking it, twisting it or shaking it, during the thinking process or when running into a design fixation. From the interaction between the pen and the pad, certain actions may be generated to stimulate the designer’s thinking process. This research uses a neural network as the main learning mechanism for the eventual development of a prototype of a pen-based drawing system that provides timely visual stimulation: a G Pen system.
series	ACADIA
email
last changed	2022/06/07 07:52

_id	ecaade03_615_54_kheng
id	ecaade03_615_54_kheng
authors	Lim, Chor-Kheng
year	2003
title	Is a pen-based system just another pen or more than a pen?
doi	https://doi.org/10.52842/conf.ecaade.2003.615
source	Digital Design [21th eCAADe Conference Proceedings / ISBN 0-9541183-1-6] Graz (Austria) 17-20 September 2003, pp. 615-622
summary	Freehand sketch is the most critical stage in the design process. The importance of the freehand sketch is in its ability to freely represent various projections of ambiguous drawing using a convenience tool, pen-and-paper. Recently, pen-based system which developed attempted to use pen as an input device, allowing sketches to be freely drawn on computers. However, as far as the various drawing projections, such as diagram, symbol, plan, elevation, section, perspective, etc., how are they interrelated to a designer’s cognitive behavior? Different media have different abilities to represent projections. What’s the difference of design cognitive behavior between conventional pen-and paper and pen-based system in view of both using a pen as a design medium? This research proceeds a think-aloud protocol analysis to present an analysis and discussion. Research results show that there is a relationship of gradual embodiment, mutually complementary, going from a whole to being dissected into sections between the different projections. Moreover, pen-based system is more than a pen, it allows designer to inspect a 3-D view during the sketching stage. This gives the designer more opportunities during the sketching stage to conduct the design thinking process based on the ambiguous 2-D projections and the more concrete 3-D images, as well as more opportunities for visual feedback
series	eCAADe
email
last changed	2022/06/07 07:59

_id	acadia03_049
id	acadia03_049
authors	Lim, Chor-Kheng
year	2003
title	An Insight into the Freedom of Using a Pen: Pen-based System and Pen-and-paper
doi	https://doi.org/10.52842/conf.acadia.2003.385
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 385-393
summary	In earlier researches on freehand sketching, the cognitive behavior of designers was studied. In recent years, some researchers began to look into this area from the design media aspect. The pen-based system, developed by Gross, Landay and other researchers, used the pen as an input device, allowing sketches to be freely drawn in a computer environment. The importance of the freehand sketch lies in its ability to freely represent various drawing projections using ambiguous sketches. However, as for the various drawing projections, such as diagrams, symbols, plans, elevations, sections, perspectives, etc., how are they interrelated to a designer’s thinking process and the cognitive behavior? Different media have different abilities to represent different projections. Would they affect the designer’s design thinking as well? Targeting different media, i.e., conventional freehand sketches vs. the computer pen-based system, this research uses case studies and think-aloud protocol analysis to present an analysis and discussion. Research results show that there is a relationship of gradual embodiment that is mutually complementary, going from a whole perspective to being the dissected into sections between the different projections. In addition, these projections restrict the designer’s various design thinking processes, while the use of different media may somewhat change the actual design thinking of the designer
series	ACADIA
email
last changed	2022/06/07 07:52

_id	caadria2009_186
id	caadria2009_186
authors	Lim, Chor-Kheng
year	2009
title	Digital CAD/CAM Media Realizes Chinese Calligraphy Aesthetics in Architectural Design
doi	https://doi.org/10.52842/conf.caadria.2009.225
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 225-234
summary	This paper attempts to explore a design method that incorporates the concept of ancient Chinese Art aesthetics into modern architectural form and space. Through the Case Study, a preliminary framework of freeform design process in using CAD/CAM media is concluded. It reveals the digitalized design process of artistic freeform space and shows Chinese calligraphy aesthetics in contemporary architecture.
keywords	Chinese Art: aesthetics; calligraphy; CAD/CAM media; digital design process
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	sigradi2010_22
id	sigradi2010_22
authors	Lim, Chor-Kheng
year	2010
title	A Teaching Framework of an “E - basic Design Studio”
source	SIGraDi 2010_Proceedings of the 14th Congress of the Iberoamerican Society of Digital Graphics, pp. Bogotá, Colombia, November 17-19, 2010, pp. 22-25
summary	The objective of this research is to illustrate the teaching of CAD/CAM media in basic design studios for 1st and 2nd year undergraduate students. The research consequently establishes a framework for an “e - basic design studio” based on design studio observations and analysis of academic literature, which include the new thoughts on tectonics and the operation of traditional 2D/3D design media and CAD/CAM digital tools.
keywords	design education, basic design studio, CAD/CAM media, digital thinking.
series	SIGRADI
email
last changed	2016/03/10 09:54

_id	acadia06_386
id	acadia06_386
authors	Lim, Chor-Kheng
year	2006
title	From Concept to Realization
doi	https://doi.org/10.52842/conf.acadia.2006.386
source	Synthetic Landscapes [Proceedings of the 25th Annual Conference of the Association for Computer-Aided Design in Architecture] pp. 386-391
summary	This research aims to provide a deeper understanding of the unique features of CAD/CAM media tools and their applications. Moreover, it analyzes the role of the CAD/CAM media in the fabricating of physical models and the kind of added benefits they offer above and beyond those of traditional hand-made physical models. This research concludes that certain aspects of CAD/CAM can aid in the digital design process.
series	ACADIA
email
last changed	2022/06/07 07:52

_id	ecaade2010_113
id	ecaade2010_113
authors	Lim, Chor-Kheng
year	2010
title	A Preliminary Study for a Teaching Framework that Incorporates CAD/CAM Media into the Basic Design Studio
doi	https://doi.org/10.52842/conf.ecaade.2010.041
source	FUTURE CITIES [28th eCAADe Conference Proceedings / ISBN 978-0-9541183-9-6] ETH Zurich (Switzerland) 15-18 September 2010, pp.41-50
summary	The objective of this research is to apply the teaching of CAD/ CAM media to basic design studios for 1~2 year undergraduate students. The research consequently concludes a framework of “e-basic design studio” based on literature analysis and design studio observations, which including the new tectonics thinking and the operation of traditional 2D/3D design media and CAD/CAM digital tools.
wos	WOS:000340629400003
keywords	Design education; Basic design studio; CAD/CAM design media; Digital thinking
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ascaad2010_051
id	ascaad2010_051
authors	Lim, Chor-Kheng
year	2010
title	Towards a Framework for CAD/CAM Design and Construction Process in Freeform Architecture: A Case Study
source	CAAD - Cities - Sustainability [5th International Conference Proceedings of the Arab Society for Computer Aided Architectural Design (ASCAAD 2010 / ISBN 978-1-907349-02-7], Fez (Morocco), 19-21 October 2010, pp. 51-64
summary	The objective of this research is to apply the teaching of CAD/CAM media to basic design studios for 1~2 year undergraduate students. The research concludes a framework of “e-basic design studio” based on literature analysis and design studio observations, which including the new tectonics thinking and the operation of traditional 2D/3D design media and CAD/CAM digital tools.
series	ASCAAD
email
last changed	2011/03/01 07:36

_id	ijac20108304
id	ijac20108304
authors	Lim, Chor-Kheng
year	2010
title	A framework of CAD/CAM design and construction process for freeform architecture: a case study
source	International Journal of Architectural Computing vol. 8 - no. 3, pp. 301-318
summary	This research aims to analyze the design and construction process of the built freeform architectural projects and understand deeply the applications of the CAD/CAM media tools, and come up with a preliminary framework of an executable general CAD/CAM design and construction process in freeform architectural design.
series	journal
last changed	2019/05/24 09:55

_id	caadria2021_033
id	caadria2021_033
authors	Lim, Chor-Kheng
year	2021
title	Towards a framework for emotional tactile interaction design
doi	https://doi.org/10.52842/conf.caadria.2021.2.335
source	A. Globa, J. van Ameijde, A. Fingrut, N. Kim, T.T.S. Lo (eds.), PROJECTIONS - Proceedings of the 26th CAADRIA Conference - Volume 2, The Chinese University of Hong Kong and Online, Hong Kong, 29 March - 1 April 2021, pp. 335-344
summary	This study aims to explore the possibility of maintaining intuitive behavior patterns and the most natural relationship coming from physical touch between human and object as interaction behaviors in interaction designs. Such an interaction will convey affection while providing brand new applications and innovative experiences offered by digital technology. Interactive behavior is natural, but the experience of affection is novel is the core idea of the interaction design in this study. The study aims to use a familiar artifact in daily life as the main carrier and embed technology in them and activate them, enabling them with sensitive sensing ability. With such an ability, the interaction between human and objects is thus sensed in a pattern of touch, which itself is affective and interactive. Interactions at the proper time can be provided as feedback, allowing users to experience emotional interaction. Through the analysis of the authors six interaction design projects and experiments over 10 years, the design process and framework for emotional tactile interaction design in using a familiar artifact is proposed.
keywords	Tactile; Interaction design; Intuitive behavior; Familiar artifact
series	CAADRIA
email
last changed	2022/06/07 07:59

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