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	c0da
authors	Gero, J.S., Kazakov, V. and Schnier, T.
year	1997
title	Genetic engineering and design problems
source	D. Dasgupta and Z. Michalewicz (Eds.), Evolutionary Algorithms in Engineering Applications, Springer Verlag, Berlin, pp.47-68
summary	This chapter reviews developments in genetic algorithms based on genetic engineering extensions. It presents the development a computational model of genetic engineering and demonstrates its applicability and utility.
keywords	Genetic Engineering, Learning
series	other
email
last changed	2003/04/06 07:18

_id	2483
authors	Gero, J.S. and Kazakov, V.
year	1997
title	Learning and reusing information in space layout problems using genetic engineering
source	Artificial Intelligence in Engineering 11(3):329-334
summary	The paper describes the application of a genetic engineering based extension to genetic algorithms to the layout planning problem. We study the gene evolution which takes place when an algorithm of this type is running and demonstrate that in many cases it effectively leads to the partial decomposition of the layout problem by grouping some activit ies together and optimally placing these groups during the first stage of the computation. At a second stage it optimally places activities within these groups. We show that the algorithm finnds the solution faster than standard evolutionary methods and that evolved genes represent design features that can be re-used later in a range of similar problems.
keywords	Genetic Engineering, Learning
series	other
email
last changed	2001/09/08 12:04

_id	a5a3
authors	Jagielski, Romuald and Gero, John S.
year	1997
title	A Genetic Programming Approach to the Space Layout Planning Problem
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 875-884
summary	The space layout planning problem belongs to the class of NP-hard problems with a wide range of practical applications. Many algorithms have been developed in the past, however recently evolutionary techniques have emerged as an alternative approach to their solution. In this paper, a genetic programming approach, one variation of evolutionary computation, is discussed. A representation of the space layout planning problem suitable for genetic programming is presented along with some implementation details and results.
series	CAAD Futures
email
last changed	2003/02/23 11:00

_id	cabb
authors	Broughton, T., Tan, A. and Coates, P.S.
year	1997
title	The Use of Genetic Programming In Exploring 3D Design Worlds - A Report of Two Projects by Msc Students at CECA UEL
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 885-915
summary	Genetic algorithms are used to evolve rule systems for a generative process, in one case a shape grammar,which uses the "Dawkins Biomorph" paradigm of user driven choices to perform artificial selection, in the other a CA/Lindenmeyer system using the Hausdorff dimension of the resultant configuration to drive natural selection. (1) Using Genetic Programming in an interactive 3D shape grammar. A report of a generative system combining genetic programming (GP) and 3D shape grammars. The reasoning that backs up the basis for this work depends on the interpretation of design as search In this system, a 3D form is a computer program made up of functions (transformations) & terminals (building blocks). Each program evaluates into a structure. Hence, in this instance a program is synonymous with form. Building blocks of form are platonic solids (box, cylinder, etc.). A Variety of combinations of the simple affine transformations of translation, scaling, rotation together with Boolean operations of union, subtraction and intersection performed on the building blocks generate different configurations of 3D forms. Using to the methodology of genetic programming, an initial population of such programs are randomly generated,subjected to a test for fitness (the eyeball test). Individual programs that have passed the test are selected to be parents for reproducing the next generation of programs via the process of recombination. (2) Using a GA to evolve rule sets to achieve a goal configuration. The aim of these experiments was to build a framework in which a structure's form could be defined by a set of instructions encoded into its genetic make-up. This was achieved by combining a generative rule system commonly used to model biological growth with a genetic algorithm simulating the evolutionary process of selection to evolve an adaptive rule system capable of replicating any preselected 3D shape. The generative modelling technique used is a string rewriting Lindenmayer system the genes of the emergent structures are the production rules of the L-system, and the spatial representation of the structures uses the geometry of iso-spatial dense-packed spheres
series	CAAD Futures
email
last changed	2003/11/21 15:16

_id	6112
authors	Daru, Roel and Snijder, H.P.S.
year	1997
title	GACAAD or AVOCAAD? CAAD and Genetic Algorithms for an Evolutionary Design Paradigm
source	AVOCAAD First International Conference [AVOCAAD Conference Proceedings / ISBN 90-76101-01-09] Brussels (Belgium) 10-12 April 1997, pp. 145-161
summary	One of the dominant paradigms in architecture is about its creation: it is done by human designers supported by tools like sketching, drawing or modelling and evaluation tools. The Darwinistic paradigm demands a paradigmatic switch from drawing, modelling and evaluation to the breeding of forms with a much more integrated generation and selecting process embedded in the computer machinery. This means a paradigm switch from a designer as the performer of (sketch, draw or modelling) work to a machine driven creation and selection process of forms with the designer as the supervisor, fully entitled to steer the process in some preferred directions. The designer creates by establishing the evolutionary rules and making choices among the architectural creatures emerging in rapid fire modethrough the synthesis performed by the machine. Natural selection is a Metaphor: in fact the designer plays Nature (or God). The creatures allowed to flourish are not adequate according to laws of Nature, but to the judgement of the designer (or to the designing team).
series	AVOCAAD
last changed	2005/09/09 10:48

_id	b5f4
authors	Gero, John S. and Ding, Lan
year	1997
title	Exploring Style Emergence in Architectural Designs
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 287-296
summary	This paper presents an evolutionary approach to style emergence in architectural designs. Emergence is the process of making features explicit which were previously only implicit. Style is considered as a set of common characteristics of a group of designs. It is interpreted using a language model as an analogy and is represented at the genetic level. An evolutionary system based on genetic engineering is developed. It emerges style by locating the genetic structures which produce that style. Preliminary results are presented.
series	other
email
last changed	2003/04/06 09:26

_id	4925
authors	Poon, J. and Maher, M.L.
year	1997
title	Co-evolution in Design
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 439-448
doi	https://doi.org/10.52842/conf.caadria.1997.439
summary	A design process is traditionally viewed as a sequential process model from the formulation of the problem to the synthesis of solutions. Simon (1981) regards design as a state-space search where a problem leads to the solution. To be more practical, there are many versions of solution generated during design, where each current one is an improvement over the previous one. This kind of synthesis of solutions can be viewed as an evolutionary system over time. We propose to apply the metaphor of "exploration” to design, and further argue that evolution occurs in the problem space as well as in the solution space. Co-evolutionary design is introduced to remove the assumption of having a fixed goal (problem). The problem is allowed to change over time. Two algorithms for co-evolution are presented. Their characteristics and differences are highlighted. The paper moves on to review the design history of the Sydney Opera House and to show how observations from this real life example confirm our co-evolutionary model.
series	CAADRIA
email
last changed	2022/06/07 08:00

_id	sigradi2006_e131c
id	sigradi2006_e131c
authors	Ataman, Osman
year	2006
title	Toward New Wall Systems: Lighter, Stronger, Versatile
source	SIGraDi 2006 - [Proceedings of the 10th Iberoamerican Congress of Digital Graphics] Santiago de Chile - Chile 21-23 November 2006, pp. 248-253
summary	Recent developments in digital technologies and smart materials have created new opportunities and are suggesting significant changes in the way we design and build architecture. Traditionally, however, there has always been a gap between the new technologies and their applications into other areas. Even though, most technological innovations hold the promise to transform the building industry and the architecture within, and although, there have been some limited attempts in this area recently; to date architecture has failed to utilize the vast amount of accumulated technological knowledge and innovations to significantly transform the industry. Consequently, the applications of new technologies to architecture remain remote and inadequate. One of the main reasons of this problem is economical. Architecture is still seen and operated as a sub-service to the Construction industry and it does not seem to be feasible to apply recent innovations in Building Technology area. Another reason lies at the heart of architectural education. Architectural education does not follow technological innovations (Watson 1997), and that “design and technology issues are trivialized by their segregation from one another” (Fernandez 2004). The final reason is practicality and this one is partially related to the previous reasons. The history of architecture is full of visions for revolutionizing building technology, ideas that failed to achieve commercial practicality. Although, there have been some adaptations in this area recently, the improvements in architecture reflect only incremental progress, not the significant discoveries needed to transform the industry. However, architectural innovations and movements have often been generated by the advances of building materials, such as the impact of steel in the last and reinforced concrete in this century. There have been some scattered attempts of the creation of new materials and systems but currently they are mainly used for limited remote applications and mostly for aesthetic purposes. We believe a new architectural material class is needed which will merge digital and material technologies, embedded in architectural spaces and play a significant role in the way we use and experience architecture. As a principle element of architecture, technology has allowed for the wall to become an increasingly dynamic component of the built environment. The traditional connotations and objectives related to the wall are being redefined: static becomes fluid, opaque becomes transparent, barrier becomes filter and boundary becomes borderless. Combining smart materials, intelligent systems, engineering, and art can create a component that does not just support and define but significantly enhances the architectural space. This paper presents an ongoing research project about the development of new class of architectural wall system by incorporating distributed sensors and macroelectronics directly into the building environment. This type of composite, which is a representative example of an even broader class of smart architectural material, has the potential to change the design and function of an architectural structure or living environment. As of today, this kind of composite does not exist. Once completed, this will be the first technology on its own. We believe this study will lay the fundamental groundwork for a new paradigm in surface engineering that may be of considerable significance in architecture, building and construction industry, and materials science.
keywords	Digital; Material; Wall; Electronics
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	e82f
authors	Howe, A Scott
year	1997
title	Designing for Automated Construction
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 83-92
doi	https://doi.org/10.52842/conf.caadria.1997.083
summary	The majority of automated construction research and development has been bottom-up, from the construction/engineering side rather than top-down from the design end. In order to optimize the use of automated technology, it is important that design principles based on the technology are considered. This paper seeks to address topics related to designing robotic systems for construction, and developing overall design principles for top-down architect/design applications. The research herein is divided into a theoretical research programme for the purpose of deriving a simple shape grammar and a simulation research programme for understanding component connections and robotic manipulation. The second part of this paper introduces a concept automated construction system designed according to the principles derived from the investigation.
series	CAADRIA
last changed	2022/06/07 07:50

_id	2c17
authors	Junge, Richard and Liebich, Thomas
year	1997
title	Product Data Model for Interoperability in an Distributed Environment
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 571-589
summary	This paper belongs to a suite of three interrelated papers. The two others are 'The VEGA Platform' and 'A Dynamic Product Model'. These two companion papers are also based on the VEGA project. The ESPRIT project VEGA (Virtual Enterprises using Groupware tools and distributed Architectures) has the objective to develop IT solutions enabling virtual enterprises, especially in the domain of architectural design and building engineering. VEGA shall give answers to many questions of what is needed for enabling such virtual enterprise from the IT side. The questions range from technologies for networks, communication between distributed applications, control, management of information flow to implementation and model architectures to allow distribution of information in the virtual enterprises. This paper is focused on the product model aspect of VEGA. So far modeling experts have followed a more or less centralized architecture (central or central with 4 satellites'). Is this also the architecture for the envisaged goal? What is the architecture for such a distributed model following the paradigm of modeling the , natural human' way of doing business? What is the architecture enabling most effective the filtering and translation in the communication process. Today there is some experience with 'bulk data' of the document exchange type. What is with incremental information (not data) exchange? Incremental on demand only the really needed information not a whole document. The paper is structured into three parts. First there is description of the modeling history or background. the second a vision of interoperability in an distributed environment from the users coming from architectural design and building engineering view point. Third is a description of work undertaken by the authors in previous project forming the direct basis for the VEGA model. Finally a short description of the VEGA project, especially the VEGA model architecture.
series	CAAD Futures
email
last changed	1999/04/06 09:19

_id	diss_marsh
id	diss_marsh
authors	Marsh, A.J.
year	1997
title	Performance Analysis and Conceptual Design
source	School of Architecture and Fine Arts, University of Western Australia
summary	A significant amount of the research referred to by Manning has been directed into the development of computer software for building simulation and performance analysis. A wide range of computational tools are now available and see relatively widespread use in both research and commercial applications. The focus of development in this area has long been on the accurate simulation of fundamental physical processes, such as the mechanisms of heat flow though materials, turbulent air movement and the inter-reflection of light. The adequate description of boundary conditions for such calculations usually requires a very detailed mathematical model. This has tended to produce tools with a very engineering-oriented and solution-based approach. Whilst becoming increasingly popular amongst building services engineers, there has been a relatively slow response to this technology amongst architects. There are some areas of the world, particularly the UK and Germany, where the use of such tools on larger projects is routine. However, this is almost exclusively during the latter stages of a project and usually for purposes of plant sizing or final design validation. The original conceptual work, building form and the selection of materials being the result of an aesthetic and intuitive process, sometimes based solely on precedent. There is no argument that an experienced designer is capable of producing an excellent design in this way. However, not all building designers are experienced, and even fewer have a complete understanding of the fundamental physical processes involved in building performance. These processes can be complex and often highly inter-related, often even counter-intuitive. It is the central argument of this thesis that the needs of the building designer are quite different from the needs of the building services engineer, and that existing building design and performance analysis tools poorly serve these needs. It will be argued that the extensive quantitative input requirement in such tools acts to produce a psychological separation between the act of design and the act of analysis. At the conceptual stage, building geometry is fluid and subject to constant change, with solid quantitative information relatively scarce. Having to measure off surface areas or search out the emissivity of a particular material forces the designer to think mathematically at a time when they are thinking intuitively. It is, however, at this intuitive stage that the greatest potential exists for performance efficiencies and environmental economies. The right orientation and fenestration choice can halve the airconditioning requirement. Incorporating passive solar elements and natural ventilation pathways can eliminate it altogether. The building form can even be designed to provide shading using its own fabric, without any need for additional structure or applied shading. It is significantly more difficult and costly to retrofit these features at a later stage in a project’s development. If the role of the design tool is to serve the design process, then a new approach is required to accommodate the conceptual phase. This thesis presents a number of ideas on what that approach may be, accompanied by some example software that demonstrates their implementation.
series	thesis:PhD
more	http://www.squ1.com/site.html
last changed	2003/11/28 07:33

_id	cf2011_p093
id	cf2011_p093
authors	Nguyen, Thi Lan Truc; Tan Beng Kiang
year	2011
title	Understanding Shared Space for Informal Interaction among Geographically Distributed Teams
source	Computer Aided Architectural Design Futures 2011 [Proceedings of the 14th International Conference on Computer Aided Architectural Design Futures / ISBN 9782874561429] Liege (Belgium) 4-8 July 2011, pp. 41-54.
summary	In a design project, much creative work is done in teams, thus requires spaces for collaborative works such as conference rooms, project rooms and chill-out areas. These spaces are designed to provide an atmosphere conducive to discussion and communication ranging from formal meetings to informal communication. According to Kraut et al (E.Kraut et al., 1990), informal communication is an important factor for the success of collaboration and is defined as ‚Äúconversations take place at the time, with the participants, and about the topics at hand. It often occurs spontaneously by chance and in face-to-face manner. As shown in many research, much of good and creative ideas originate from impromptu meeting rather than in a formal meeting (Grajewski, 1993, A.Isaacs et al., 1997). Therefore, the places for informal communication are taken into account in workplace design and scattered throughout the building in order to stimulate face-to-face interaction, especially serendipitous communication among different groups across disciplines such as engineering, technology, design and so forth. Nowadays, team members of a project are not confined to people working in one location but are spread widely with geographically distributed collaborations. Being separated by long physical distance, informal interaction by chance is impossible since people are not co-located. In order to maintain the benefit of informal interaction in collaborative works, research endeavor has developed a variety ways to shorten the physical distance and bring people together in one shared space. Technologies to support informal interaction at a distance include video-based technologies, virtual reality technologies, location-based technologies and ubiquitous technologies. These technologies facilitate people to stay aware of other‚Äôs availability in distributed environment and to socialize and interact in a multi-users virtual environment. Each type of applications supports informal interaction through the employed technology characteristics. One of the conditions for promoting frequent and impromptu face-to-face communication is being co-located in one space in which the spatial settings play as catalyst to increase the likelihood for frequent encounter. Therefore, this paper analyses the degree to which sense of shared space is supported by these technical approaches. This analysis helps to identify the trade-off features of each shared space technology and its current problems. A taxonomy of shared space is introduced based on three types of shared space technologies for supporting informal interaction. These types are named as shared physical environments, collaborative virtual environments and mixed reality environments and are ordered increasingly towards the reality of sense of shared space. Based on the problem learnt from other technical approaches and the nature of informal interaction, this paper proposes physical-virtual shared space for supporting intended and opportunistic informal interaction. The shared space will be created by augmenting a 3D collaborative virtual environment (CVE) with real world scene at the virtual world side; and blending the CVE scene to the physical settings at the real world side. Given this, the two spaces are merged into one global structure. With augmented view of the real world, geographically distributed co-workers who populate the 3D CVE are facilitated to encounter and interact with their real world counterparts in a meaningful and natural manner.
keywords	shared space, collaborative virtual environment, informal interaction, intended interaction, opportunistic interaction
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	af6d
authors	Rockwood, Alyn P. and Winget, Jim
year	1997
title	Three-dimensional object reconstruction from two-dimensional images
source	Computer-Aided Design, Vol. 29 (4) (1997) pp. 279-285
summary	In order to construct a 3D model from a collection of 2D images of an object, an energy function is defined between the object's images and corresponding images ofan articulated mesh in three dimensions. Repeated adjustment of the mesh to minimize the energy function results in a mesh that produces images which closelyapproximate the input images, that is to say that under the appropriate conditions it realizes a preconceived object. It has implications for model building, reverseengineering and computer vision. Minimization of the energy function is a multivariate problem of large scale with many local minima. We give an approach forsolving this problem. For certain restricted, but useful applications, intuitive solutions to the minimization are consistently obtained.
keywords	Reverse Engineering, Simulated Annealing, Object Reconstruction
series	journal paper
last changed	2003/05/15 21:33

_id	a33d
authors	Veloso, M., Mulvehill A. and Cox, M.
year	1997
title	Rationale-supported mixed-initiative case-based planning
source	Innovative Applications of Artificial Intelligence, pp. 1072-1077
summary	Mixedinitiative planning envisions a framework in which automated and human planners interact to jointly construct plans that satisfy specific objectives. In this paper, we report on our work engineering a robust mixedinitiative planning system. Human planners rely strongly on past planning experience to generate new plans. ForMAT is a casebased system that supports human planning through the accumulation of userbuilt plans, querydriven browsing of past plans, and several plan functionality analysis primitives. Prodigy/Analogy is an automated AI planner that combines generative and casebased planning. Stored plans are annotated with plan rationale and reuse involves adaptation driven by this rationale. Our system, MICBP, integrates ForMAT and Prodigy/Analogy into a realtime messagepassing mixedinitiative planning system. The main technical approach consists of allowing the user to specify and link objectives that enable the system to capture and reuse plan rationale. We present MICBP and its concrete application to the domain of military force deployment planning. This synergistic system increases the planning efficiency of human planners through automated suggestion of similar past plans and plausible plan modifications.
series	other
last changed	2003/04/23 15:50

_id	6537
authors	Wang, W. and Gero, J.S.
year	1997
title	Sequence-based prediction in the conceptual design of bridges
source	ASCE Journal of Computing in Civil Engineering 11(1): 37-43
summary	This paper explores the application of a machine learning technique in knowledge support systems in civil engineering design. It presents a sequence-based prediction method for engineering design and demonstrates its utility in the conceptual design of bridges. The basic idea of sequence-based prediction is that the most recent numbers of similar design cases are used in predicting the characteristics of the next design and more recent cases are given stronger influence on decision making in the new design situation than older ones. This paper develops a model of sequence-based prediction and carries out a number of experiments using it. It is then applide to a set of standard data and the results of using a sequence-based prediction method are compared with other methods. The empirical results show the potential applications of the method in engineering design.
keywords	Machine Learning, Time
series	journal paper
email
last changed	2003/05/15 21:45

_id	2ad9
authors	Damski, José C. and Gero, John S.
year	1997
title	An Evolutionary Approach to Generating Constraint-Based Space Layout Topologies
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 855-864
summary	This paper describes a system to produce space layout topologies for architectural plans using an evolutionary approach. The layout specification is defined as a set of topological and directional constraints, which are used as a fitness function in the evolutionary system. The halfplane representation is used to represent the genotypes in the evolutionary system, for both arrangements of halfplanes and the figures generated from those arrangements. As the halfplane representation proposed here does not distinguish between straight and non-straight boundaries, at the symbolic level the spaces and the layouts produced can also be bounded by straight or non-straight lines. The well known rectangular (polyomino) arrangements become a particular case only.
series	CAAD Futures
email
last changed	1999/04/06 09:19

_id	f7e8
authors	Frazer, J.H. and Stephenson, P.
year	1997
title	The Groningen Experiment
source	Architectural Association Publications, publ. pend.
summary	In its first five years, the Architectural Association's Diploma unit II developed the theoretical framework of an alternative generative process, using computer models to compress evolutionary space and time. This led to a prototype that could be demonstrated interactively and the launch on the Internet of an experimental evolutionary environment which attracted global participation, established a dematerialised model. The new phase of the programme has begun to externalise this conceptual model into constructed form, focusing on urban-scale evolution and other historical and natural examples of co-operative and ecologically i integrated development. The approach has been to consider metabolic processes as a way of understanding both the formal development of urban symbiosis and the specific problem of materialization. The city planning department of Groningen commissioned a small working prototype demonstration of a predictive urban computer model. The unit produced an evolving model which explains the transition from the past to the present, and projects future trajectories a "what if" model for generating, exploring and evaluating alternatives. The model mediates in scale, space and time: ; in scale between the urban context and the fine grain of the housing typologies ; in space between the existing fabric of Groningen and specific dwelling units ; in time between the lifestyle within the medieval core and the desires of the citizens of tile next century
series	other
last changed	2003/04/23 15:14

_id	4278
authors	Frazer, John
year	1997
title	The Groningen Experiment
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 345-353
doi	https://doi.org/10.52842/conf.caadria.1997.345
summary	This paper first describes an experimental evolutionary and generative model for the city of Groningen in northern Holland and goes on to speculate on how such techniques could be broadened and applied to the possible global co-operative evolution of cities.
series	CAADRIA
email
last changed	2022/06/07 07:50

_id	cc51
authors	Schnier, T. and Gero, J.S
year	1997
title	Dominant and recessive genes in evolutionary systems applied to spatial reasoning
source	A. Sattar (Ed.), Advanced Topics in Artificial Intelligence: 10th Australian Joint Conference on Artificial Intelligence AI97 Proceedings, Springer, Heidelberg, pp. 127-136
summary	Learning genetic representation has been shown to be a useful tool in evolutionary computation. It can reduce the time required to find solutions and it allows the search process to be biased towards more desirable solutions. Learn-ing genetic representation involves the bottom-up creation of evolved genes from either original (basic) genes or from other evolved genes and the introduction of those into the population. The evolved genes effectively protect combinations of genes that have been found useful from being disturbed by the genetic operations (cross-over, mutation). However, this protection can rapidly lead to situations where evolved genes in-terlock in such a way that few or no genetic operations are possible on some genotypes. To prevent the interlocking previous implementations only allow the creation of evolved genes from genes that are direct neighbours on the genotype and therefore form continuous blocks. In this paper it is shown that the notion of dominant and recessive genes can be used to remove this limitation. Using more than one gene at a single location makes it possible to construct genetic operations that can separate interlocking evolved genes. This allows the use of non-continuous evolved genes with only minimal violations of the protection of evolved genes from those operations. As an example, this paper shows how evolved genes with dominant and re-cessive genes can be used to learn features from a set of Mondrian paintings. The representation can then be used to create new designs that contain features of the examples. The Mondrian paintings can be coded as a tree, where every node represents a rectangle division, with values for direction, position, line-width and colour. The modified evolutionary operations allow the system to cre-ate non-continuous evolved genes, for example associate two divisions with thin lines, without specifying other values. Analysis of the behaviour of the system shows that about one in ten genes is a dominant/recessive gene pair. This shows that while dominant and recessive genes are important to allow the use of non-continuous evolved genes, they do not occur often enough to seriously violate the protection of evolved genes from genetic operations.
keywords	Evolutionary Systems, Genetic Representations
series	other
email
last changed	2003/04/06 07:24

_id	041e
authors	Hall, Theodore W.
year	1997
title	Hand-Eye Coordination in Virtual Reality, Using a Desktop Display, Stereo Glasses and a 3-D Mouse
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 73-82
doi	https://doi.org/10.52842/conf.caadria.1997.073
summary	Many virtual-reality displays augment the user’s view of the real world but do not completely mask it out or replace it. Intuitive control and realistic interaction with these displays depend on accurate hand-eye coordination: the projected image of a 3-D cursor in virtual space should align visually with the real position of the 3-D input device that controls it. This paper discusses some of the considerations and presents algorithms for coordinating the physical and virtual worlds.
series	CAADRIA
email
last changed	2022/06/07 07:50

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