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	8504
authors	Junge, Richard. (Ed.)
year	1997
title	CAAD futures 1997 [Conference Proceedings]
source	7th International Conference on Computer-Aided Architectural Design/ ISBN 0-7923-4726-9 / München / Germany, 4-6 August 1997, 931 p.
summary	Since the establishment of the CAAD futures Foundation in 1985 CAAD experts from all over the world meet every two years to present and at the same time document the state of art of research in Computer Aided Architectural Design. The history of CAAD futures started in the Netherlands at the Technical Universities of Eindhoven and Delft, where the CAAD futures Foundation came into being. Then CAAD futures crossed the oceans for the first time, the third CAAD futures in '89 was held at Harvard University. Next stations in the evolution where in '91 Swiss Federal Institute of Technology, the ETH Zürich. In '93 the conference was organized by Carnegie Mellon University, Pittsburgh and in '95 by National University Singapore. CAAD futures '95 marked the world wide nature by organizing it for the first time in Asia. The seventh CAAD futures is the first being organized by a German University. For the as small as newly and only provisional established CAAD group at the Faculty for Architecture at Technical University München it is honor and challenge at the same time to be the organizer of CAAD futures '97.
series	CAAD Futures
email
last changed	1999/04/06 09:19

_id	817b
authors	Bong, C.W. and Wang, Y.C.
year	2002
title	A Shape Compactness Measurement Indexing with Fuzzy Multicriteria Decision Making Approach
doi	https://doi.org/10.52842/conf.caadria.2002.093
source	CAADRIA 2002 [Proceedings of the 7th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 983-2473-42-X] Cyberjaya (Malaysia) 18–20 April 2002, pp. 093-100
summary	Compactness of a district or zone is determined by considering its appearance and the area of dispersal of the district (Altman, 1998) and it is used as a characteristic to describe shape (Shiode, 1998; Knight, 1997). However, existing compactness measurement used to assess district plans in redistricting applications are vague and imprecision although there are more than thirty over Euclidean or non-Euclidean measurement methods. Therefore, this paper presents an integrated shape compactness measurement indexing with a fuzzy multicriteria decision making approach (FMCDM) to enhance the measurement of shape compactness. An experiment is conducted in order to verify the practically of the proposed model to improve existing compactness measurement method.
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	eaea2005_151
id	eaea2005_151
authors	Ohno, Ruyzo
year	2006
title	Seat preference in public squares and distribution of the surrounding people: An examination of the validity of using visual simulation
source	Motion, E-Motion and Urban Space [Proceedings of the 7th European Architectural Endoscopy Association Conference / ISBN-10: 3-00-019070-8 - ISBN-13: 978-3-00-019070-4], pp. 151-163
summary	Public squares are shared by people who use them for various purposes. When people choose seats in a square, they unconsciously evaluate not only the physical characteristics of the space but also the distribution of others already present (Hall, 1966; Sommer, 1969; Whyte, 1988). Knowing the hidden rules of this behaviour will be important in designing squares that remain comfortable even in crowded situations. Most past studies of seat choice preference have reported on statistical tendencies derived from observations of subject behavior in actually existing sites (i.e., Abe, 1997; Imai, 1999; Kawamoto, 2003). However, they provide no clear theoretical model for explaining the basic mechanisms regulating such behaviour. The present study conducts a series of experiments in both real and virtual settings in order to extract quantitative relationships between subjects’ seat preferences and the presence of nearby strangers and to clarify what factors influence their seat choices.
series	EAEA
type	normal paper
email
more	http://info.tuwien.ac.at/eaea
last changed	2008/04/29 20:46

_id	ascaad2014_003
id	ascaad2014_003
authors	Parlac, Vera
year	2014
title	Surface Dynamics: From dynamic surface to agile spaces
source	Digital Crafting [7th International Conference Proceedings of the Arab Society for Computer Aided Architectural Design (ASCAAD 2014 / ISBN 978-603-90142-5-6], Jeddah (Kingdom of Saudi Arabia), 31 March - 3 April 2014, pp. 39-48
summary	Behavior, adaptation and responsiveness are characteristics of live organisms; architecture on the other hand is structurally, materially and functionally constructed. With the shift from ‘mechanical’ towards ‘organic’ paradigm (Mae-Wan Ho, 1997) attitude towards architectural adaptation, behavior and performance is shifting as well. This change is altering a system of reference and conceptual basis for architecture by suggesting the integration of dynamics – dynamics that don’t address kinetic movement only but include flows of energies, material and information. This paper presents an ongoing research into kinetic material system with the focus on non-mechanical actuation (shape memory alloy) and the structural and material behavior. It proposes an adaptive surface capable of altering its shape and forming small occupiable spaces that respond to external and internal influences and flows of information. The adaptive structure is developed as a physical and digital prototype. Its behavior is examined at a physical level and the findings are used to digitally simulate the behavior of the larger system. The design approach is driven by an interest in adaptive systems in nature and material variability (structural and functional) of naturally constructed materials. The broader goal of the research is to test the scale at which shape memory alloy can be employed as an actuator of dynamic architectural surfaces and to speculate on and explore the capacity of active and responsive systems to produce adaptable surfaces that can form occupiable spaces and with that, added functionalities in architectural and urban environments.
series	ASCAAD
email
last changed	2016/02/15 13:09

_id	411c
authors	Ataman, Osman and Bermúdez (Ed.)
year	1999
title	Media and Design Process [Conference Proceedings]
doi	https://doi.org/10.52842/conf.acadia.1999
source	ACADIA ‘99 Proceedings / ISBN 1-880250-08-X / Salt Lake City 29-31 October 1999, 353 p.
summary	Throughout known architectural history, representation, media and design have been recognized to have a close relationship. This relationship is inseparable; representation being a means for engaging in design thinking and making and this activity requiring media. Interpretations as to what exactly this relationship is or means have been subject to debate, disagreement and change along the ages. Whereas much has been said about the interactions between representation and design, little has been elaborated on the relationship between media and design. Perhaps, it is not until now, surrounded by all kinds of media at the turn of the millennium, as Johnson argues (1997), that we have enough context to be able to see and address the relationship between media and human activities with some degree of perspective.
series	ACADIA
email
more	http://www.acadia.org
last changed	2022/06/07 07:49

_id	811e
authors	Coyne, Richard and Mclachlan, Fiona
year	1997
title	The Legacy of Surrealism in the Electronic Design Studio
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 733-748
summary	We examine how Surrealist themes are evident in the world of information technology, and in the electronic design studio. We show that much of the current popular appeal of the computer in design schools is attributable to the computer's apparent surrealistic possibilities rather than the potentialities traditionally put forward by exponents of formalism, design methods and systems theory. We discuss developments on Surrealism, including the application of Freud's concept of the uncanny and Lacan's understanding of the image, before concluding that Surrealism and its developments support a "hermeneutics of suspicion", which is one way of interpreting what occurs in the design studio.
series	CAAD Futures
email
more	http://www.caad.ed.ac.uk/
last changed	1999/04/06 09:19

_id	ddss9829
id	ddss9829
authors	De Hoog, J., Hendriks, N.A. and Rutten, P.G.S.
year	1998
title	Evaluating Office Buildings with MOLCA(Model for Office Life Cycle Assessment)
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	MOLCA (Model for Office Life Cycle Assessment) is a project that aims to develop a tool that enables designers and builders to evaluate the environmental impact of their designs (of office buildings) from a environmental point of view. The model used is based on guidelinesgiven by ISO 14000, using the so-called Life Cycle Assessment (LCA) method. The MOLCA project started in 1997 and will be finished in 2001 resulting in the aforementioned tool. MOLCA is a module within broader research conducted at the Eindhoven University of Technology aiming to reduce design risks to a minimum in the early design stages.Since the MOLCA project started two major case-studies have been carried out. One into the difference in environmental load caused by using concrete and steel roof systems respectively and the role of recycling. The second study focused on biases in LCA data and how to handle them. For the simulations a computer-model named SimaPro was used, using the world-wide accepted method developed by CML (Centre for the Environment, Leiden, the Netherlands). With this model different life-cycle scenarios were studied and evaluated. Based on those two case studies and a third one into an office area, a first model has been developed.Bottle-neck in this field of study is estimating average recycling and re-use percentages of the total flow of material waste in the building sector and collecting reliable process data. Another problem within LCA studies is estimating the reliability of the input data and modelling uncertainties. All these topics will be subject of further analysis.
keywords	Life-Cycle Assessment, Office Buildings, Uncertainties in LCA
series	DDSS
last changed	2003/08/07 16:36

_id	d347
authors	Kvan, Th., Vera, A. and West, R.L.
year	1997
title	Expert and Situated Actions in Collaborative Design
source	Proceedings of Second International Workshop on CSCW in Design, ed. P. Siriruchatapong, Z. Lin & J.-P. Barthes. Second International Workshop on CSCW in Design, Beijing: International Academic Publishers, November, pp. 400-405
summary	This paper considers one of the fundamental questions behind research and implementation into collaborative design systems for architectural design: To what extent is design situated and to what extent is it expert behaviour? Extending from this question arises implementation questions for CSCW systems for architectural design. The authors propose a cognitive model of design and tested the model experimentally. From the results of the experiments; a discussion is presented of the expert and situated facets of the design process which have been manifested.
keywords	Collaboration; CSCW; Group Work; Design
series	other
email
last changed	2003/01/28 12:06

_id	789d
authors	Kvan, Th., West, R. and Vera, A.
year	1997
title	Tools for a Virtual Design Community
source	Preprints Formal Aspects of Collaborative CAD, ed. M. L. Maher, J. S. Gero & F. Sudweeks, Sydney: Key Centre of Design Computing, Department of Architectural and Design Science, University of Sydney, pp. 109-123
summary	This paper proposes a methodology to evaluate the effects of computer-mediated communication on collaboratively solving design problems. When setting up a virtual design community; choices must be made between a variety of tools; choices dictated by budget; bandwidth; ability and availability. How do you choose between the tools; which is useful and how will each affect the outcome of the design exchanges you plan? A commonly used method is to analyze the work done and to identify tools which support this type of work. In general; research on the effects of computer-mediation on collaborative work has concentrated mainly on social-psychological factors such as deindividuation and attitude polarization; and used qualitative methods. In contrast; we propose to examine the process of collaboration itself; focusing on separating those component processes which primarily involve individual work from those that involve genuine interaction. Extending the cognitive metaphor of the brain as a computer; we view collaboration in terms of a network process; and examine issues of control; coordination; and delegation to separate sub-processors. Through this methodology we attempt to separate the individual problem-solving component from the larger process of collaboration.
keywords	CSCW; Group Work; Design; Expertise; Collaboration; Novice
series	other
email
last changed	2002/11/15 18:29

_id	0f97
authors	Kvan, Th., West, R. and Vera, A.
year	1997
title	Choosing Tools for a Virtual Community
source	Creative Collaboration in Virtual Communities 1997, ed. A. Cicognani. VC'97. Sydney: Key Centre of Design Computing, Department of Architectural and Design Science, University of Sydney, 20 p.
summary	This paper reports on the results of experiments carried out to identify the effects of computer-mediated communication between participants involved in a design problem. When setting up a virtual design community, choices must be made between a variety of tools, choices dictated by budget, bandwidth, ability, availability. How do you choose between the tools, which is useful and how will each affect the outcome of the design exchanges you plan? Cognitive modelling methodologies such as GOMS have been used by interface designers to capture the mechanisms of action and interaction involved in routine expert behavior. Using this technique, which breaks down an individual's behaviors into Goals, Operators, Methods, and Selection rules, it is possible to evaluate the impact of different aspects of an interface in task-specific ways. In the present study, the GOMS methodology was used to characterize the interactive behavior of knowledgeable participants as they worked on a design task under different communication-support conditions. Pairs of participants were set a design problem and asked to solve it in face-to-face settings. The same problem was then tackled by participants in settings using two different modes of computer-supported communication: email and an electronic whiteboard. Protocols were collected and analyzed in terms of the constraints of each tool relative to the task and to each other. The GOMS methodology was used as a way to represent the collaborative design process in a way that yields information on both the productivity and performance of participants in each of the three experimental conditions. It also yielded information on the component elements of the design process, the basic cognitive building-blocks of design, thereby suggesting fundamentally new tools that might be created for interaction in virtual environments. A further goal of the study was to explore the nature of task differences in relation to alternative platforms for communication. It was hypothesized that design processes involving significant negotiation would be less aided by computer support than straight forward design problems. The latter involve cooperative knowledge application by both participants and are therefore facilitated by information-rich forms of computer support. The former, on the other hand, requires conflict resolution and is inhibited by non face-to-face interaction. The results of this study point to the fact that the success of collaboration in virtual space is not just dependent on the nature of the tools but also on the specific nature of the collaborative task.
keywords	Cognitive Models, Task-analysis, GOMS
series	other
email
last changed	2003/05/15 20:50

_id	2e3b
authors	Kvan, Thomas and Kvan, Erik
year	1997
title	Is Design Really Social
source	Creative Collaboration in Virtual Communities 1997, ed. A. Cicognani. VC'97. Sydney: Key Centre of Design Computing, Department of Architectural and Design Science, University of Sydney, 8 p.
summary	There are many who will readily agree with Mitchell’s assertion that “the most interesting new directions (for computer-aided design) are suggested by the growing convergence of computation and telecommunication. This allows us to treat designing not just as a technical process... but also as a social process.” [Mitchell 1995]. The assumption is that design was a social process until users of computer-aided design systems were distracted into treating it as a merely technical process. Most readers will assume that this convergence must and will lead to increased communication between design participants; that better social interaction leads to be better design. The unspoken assumption appears to be that putting the participants into an environment with maximal communication channels will result in design collaboration. The tools provided; therefore; must permit the best communication and the best social interaction. We think it essential to examine the foundations and assumptions on which software and environments are designed to support collaborative design communication. Of particular interest to us in this paper is the assumption about the “social” nature of design. Early research in computer-assisted design collaborations has jumped immediately into conclusions about communicative models which lead to high-bandwidth video connections as the preferred channel of collaboration. The unstated assumption is that computer-supported design environments are not adequate until they replicate in full the sensation of being physically present in the same space as the other participants (you are not there until you are really there). It is assumed that the real social process of design must include all the signals used to establish and facilitate face-to-face communication; including gestures; body language and all outputs of drawing (e.g. Tang [1991]). In our specification of systems for virtual design communities; are we about to fall into the same traps as drafting systems did?
keywords	CSCW; Virtual Community; Architectural Design; Computer-Aided Design
series	other
email
last changed	2002/11/15 18:29

_id	ddss9837
id	ddss9837
authors	Liu, Yu-Tung and Bai, Rui-Yuan
year	1998
title	The roles of virtual reality, image processing, and multimedia in thedesign of public spaces: 1997 Hsinchu Project
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	This paper examines the procedure of visual impact analysis and assessment proposed by Rahman and reviews the use of CAD applications in urban projects in the real world. A preliminary computerized procedure for visual impact analysis and assessment is proposed. An experiments wasconducted in our laboratory to verify the preliminary procedure. In order to further study the revised procedure in real urban projects, it was also applied into the renew project of The Eastern Gate Plaza located in the center of city Hsinchu, Taiwan from 1996 to 1998. According to several face-to-face discussions with Hsinchu habitants, government officials, and professional designers, a final computerized procedure for visual impact analysis and assessment is concluded.
series	DDSS
last changed	2003/08/07 16:36

_id	29cf
authors	Martens, B., Linzer. H. and Voigt, A. (Ed.)
year	1997
title	Challenges of the Future
doi	https://doi.org/10.52842/conf.ecaade.1997
source	15th eCAADe Conference Proceedings / ISBN 0-9523687-3-0 / Vienna (Austria) 17-20 September 1997, CD-Rom
summary	As most of us have observed in the past few years, we have begun to emerge as intermediaries between education, practice and the new technologies. We have begun to provide new computational research orientations to the generation of knowledge about design and design&planning process. Over and above acting as a medium of access to tools, we have begun to function in new roles in our schools as strengthening the presence of theories and the intellectual content of design and planning education. The emergence of new media and techniques are further influencing our function as interpreters of the conceptual implications of change and development. This is the challenge of ECAADE Vienna 97. We believe that it will be an exhilarating experience.
keywords	Collaborative Teamwork, Digital Design Process, Spatial Modeling
series	eCAADe
email
more	http://info.tuwien.ac.at/ecaade/
last changed	2022/06/07 07:49

_id	ddss9842
id	ddss9842
authors	Mattsson, Helena
year	1998
title	Working with unpredictability
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	The paper deals with notions of complexity in art and architecture. On the basis of a recent sculptural work by Richard Serra, Torqued Ellipses (1997), the notion of complexity is investigated in terms of how it situates the viewer, and affects our sense of space and time. Serra’s work is analyzed in terms of the artist’s working method, the production of the work, and finally the ”external relations” which connect it to the viewer and the context. In each of these steps, the notions of complexity and unpredictability are shown to have a formative role. The relations between space and time, object and context, are redefined in Serra’s work, which also gives it great importance for architectural theory and practice.
series	DDSS
last changed	2003/08/07 16:36

_id	05fc
authors	Park, Hoon
year	1997
title	Cyber Design Studio: Using Manual Media Via Internet Connections for Collaborative Design
doi	https://doi.org/10.52842/conf.ecaade.1997.x.c9n
source	Challenges of the Future [15th eCAADe Conference Proceedings / ISBN 0-9523687-3-0] Vienna (Austria) 17-20 September 1997
summary	This article explores how Computer Aided Design (CAD) systems can be applicable and integrated into the early stage of design. CAD systems are still technologies that are not broadly accepted as useful to the designer especially in this stage of design because CAD systems use the monitor and mouse which differ from the sketch paper and pen of manual media. This article discusses how manual media and Computer-Mediated Communication (CMC) technologies - video conferencing, in my examples - that employ multimedia and Internet can empower designers by providing them with new ways of working together. For accommodating this approach, a prototype CAD system has been developed in which the system consists of a conventional drawing and extra capabilities. This system allows the designer to work with computer based and paper based tools in the same conventional environment as well as remote communications between the designers. This environment is used as the setting for a case study of design tutorials in the design studio. The analysis of this work provides interesting insight into the traditional roles of design studio as well as the relationship between digital and manual media.
keywords	Cyber Design Studio, Collaborative Design
series	eCAADe
email
more	http://info.tuwien.ac.at/ecaade/proc/parkh/parkhoon.htm
last changed	2022/06/07 07:50

_id	a5f1
authors	Piegl, Les and Tiller, Wayne
year	1997
title	The Nurbs Book
source	New York: Springer (2nd ed.)
summary	The second, revised edition of this book covers all aspects of non-uniform rational B-splines necessary to design geometry in a computer-aided environment. Basic B-spline features, curve and surface algorithms, and state-of-the-art geometry tools are all discussed. Detailed code for design algorithms and computational tricks are covered, too, in a lucid, easy-to-understand style, with a minimum of mathematics and using numerous worked examples. The book is a must for students, researchers, and implementors whose work involves the use of splines.
series	other
last changed	2003/04/23 15:14

_id	ecaade2012_86
id	ecaade2012_86
authors	QaQish ; Ra’Ed K.
year	2012
title	15 Years of CAD Teaching in Jordan: How Much Has Been Accomplished? A Comparative Analysis of the Use of CAD in Architectural Schools Between 1997 and 2012
doi	https://doi.org/10.52842/conf.ecaade.2012.2.023
source	Achten, Henri; Pavlicek, Jiri; Hulin, Jaroslav; Matejovska, Dana (eds.), Digital Physicality - Proceedings of the 30th eCAADe Conference - Volume 2 / ISBN 978-9-4912070-3-7, Czech Technical University in Prague, Faculty of Architecture (Czech Republic) 12-14 September 2012, pp. 23-32
summary	The paper reports on a study which examines the evolution in architectural education trends arising from the changes brought about by both Socioeconomic Factors and the implications of CAAD in the last 15 years in Jordanian universities. The findings reflect the views of thirteen (13) architecture faculties/schools through a nation-wide questionnaire survey conducted in the spring of 2012. The survey was structured to cover both private and public universities in Jordan, represented by faculties of engineering, architecture and design. Structurally, the main fi ndings of this study are summarized under six areas, namely: 1) General Students’ Information, 2) Demographic and Socioeconomic Factors, 3) CAD Competences amongst both Staff and Students, 4) Program of Study and CAD Courses, 5) Overall Satisfaction of CAD Courses and Training , 6) CAD and Social Networks. The majority of student respondents were females (144) (53.3%). The top laptop brands used were HP (17%) Toshiba (12.2%) and Dell (7.8%). The CAD packages found to be most highly used throughout universities were AutoCAD, 3D Max, Sketch-up, and Adobe Suite. The importance of new technologies, electronic book, and the social network aspects in enhancing CAD and 3D modeling software integration with the design studio was affi rmed yet no relationship to the gender was noted.
wos	WOS:000330320600001
keywords	CAD Integration, Socioeconomic Factors
series	eCAADe
email
last changed	2022/06/07 07:58

_id	7244
authors	QaQish, Ra'Ed Kamal Musa
year	1997
title	Computer Aided Learning in Computer Aided Design : inter & intra departmental computer management learning (CML) in architectural education (AE)
source	University of Glasgow
keywords	Computer-Assisted Instruction; Architectural Design; Data Processing
series	thesis:PhD
last changed	2003/02/12 22:37

_id	ab09
authors	Qaqish, Ra’ed and Hanna, Raid
year	1997
title	The Impact of CAL Strategies on CAD
doi	https://doi.org/10.52842/conf.caadria.1997.475
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. 475-489
summary	This paper reports on a two fold study, which examines the impact of CAL on CAD and architectural education, and evaluates the overall effectiveness and efficiency of CAD teaching and strategies in the curriculum of architecture. The study also examined the need for a framework within which the creation of a module for applying CAL in CAD to support the curriculum of architecture can be structured and assessed. The main concern of the study was to explore the range and balance of computer assisted activities in the design studio, and the interpretation of the various roles of the CAD tutor and his/her involvement in delivering these activities. In delivering these activities two criteria, namely: teaching methods and CAD integration (which are interchangeable and yet play different roles), can have a distinct effect on the implementation of CAL in the design studio. The case study evaluated and investigated the CAL the AEC course as part of the 3rd year design studio at Mackintosh School of Architecture, to determine to what extent the AEC learning events were effective in advocating new strategies in CAD. The methods of this investigation consisted of classroom observations and administrating questionnaires. Variables such as the group and gender differences/participation, the tutor’s confidence, level of administration and strategies to help with technical problems and motivations, also the task-related activities, tangibility of the learning materials, and the minutes of lesson have been examined. The global rating of the CAL events in CAD lessons, the CAL organisation and sequence, the level of students’ confidence, the rate of students’ interest, the mode of classroom, the level of learner performance and the relationship between CAL and the overall curriculum have also been empirically examined and their interdependent relationships explored. The findings of this study may help in establishing future directions in adopting some form of effective CAL strategies in CAD. The study also serves as an evaluation tool for computing teaching in the design studio. Furthermore, the checklist used in this case study may also be used in evaluating the different courses in CAD in the curriculum of architectural schools.
series	CAADRIA
last changed	2022/06/07 08:00

_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

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