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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	cf2005_1_64_168
id	cf2005_1_64_168
authors	ACHTEN Henri
year	2005
title	Resolving some Ambiguities in Real-time Design Drawing Recognition by means of a Decision Tree for Agents
source	Computer Aided Architectural Design Futures 2005 [Proceedings of the 11th International Conference on Computer Aided Architectural Design Futures / ISBN 1-4020-3460-1] Vienna (Austria) 20–22 June 2005, pp. 311-320
summary	In this paper, we present a theoretical study on automated understanding of the design drawing. This can lead to design support through the natural interface of sketching. In earlier work, 24 plan-based conventions of depiction have been identified, such as grid, zone, axial system, contour, and element vocabulary. These are termed graphic units. Graphic units form a good basis for recognition of drawings as they combine shape with meaning. We present some of the theoretical questions that have to be resolved before an implementation can be made. The contribution of this paper is: (i) identification of domain knowledge which is necessary for recognition; (ii) outlining combined strategy of multi-agent systems and online recognition; (iii) functional structure for agents and their organisation to converge on sketch recognition.
keywords	multi-agent system, decision tree, pattern recognition, sketch
series	CAAD Futures
email
last changed	2006/11/07 07:27

_id	eb8a
authors	Achten, H., De Vries, B. and Jessurun, J.
year	2000
title	DDDOOLZ. A Virtual Reality Sketch Tool for Early Design
doi	https://doi.org/10.52842/conf.caadria.2000.451
source	CAADRIA 2000 [Proceedings of the Fifth Conference on Computer Aided Architectural Design Research in Asia / ISBN 981-04-2491-4] Singapore 18-19 May 2000, pp. 451-460
summary	This paper presents DDDoolz, a desktop-VR three-dimensional voxel sketchtool. DDDoolz is developed in the Design Systems Group to explore the use of Virtual Reality technology in the early design stage. The aim is to offer a sketch-like environment in VR with an unobtrusive interface. The paper presents DDDoolz, how it is used in education and with partners in architectural practice, and some future developments.
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	fa3e
id	fa3e
authors	Achten, H., de Vries, B. and van Leeuwen, J.
year	2001
title	THE VR-DIS RESEARCH PROGRAMME
source	Achten, H.H., de Vries, B. and Hennessey, J. (eds). Design Research in the Netherlands 2000, 155-163
series	book
type	normal paper
email
more	http://www.designresearch.nl/PDF/DRN2000_AchtenDeVriesVanLeeuwen.pdf
last changed	2005/10/12 15:41

_id	e75d
authors	Achten, H., Dijkstra, J., Oxman, R. and Bax, Th.
year	1995
title	Knowledge-Based Systems Programming for Knowledge Intensive Teaching
doi	https://doi.org/10.52842/conf.ecaade.1995.139
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 139-148
summary	Typological design implies extensive knowledge of building types in order to design a building belonging to a building type. It facilitates the design process, which can be considered us a sequence of decisions. The paper gives an outline of a new approach in a course teaching typological knowledge through the medium of Knowledge-Based Systems programming. It demonstrates how Knowledge-Based Systems offer an appropriate structure for analysing the knowledge required to implement typological design. The class consists of third-year undergraduate students with no extensive previous programming experience. The implementation language is AutoLISP which operates in the AutoCAD environment. The building type used in the course is the office building. in order to become acquainted with both building type and programming in AutoLISP, information and instructions have been gathered and prestructured, including a worked out analysis and AutoLISP code. Office plans are generated through use of the Knowledge-Based System. They are encoded in the form of frames. At the end of the course the students will have learned the basics of Knowledge-Based Systems, have been introduced to programming these systems, have analysed and reflected upon the design process, and gained insight into a specific building type.
series	eCAADe
email
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_18.htm
last changed	2022/06/07 07:54

_id	e336
authors	Achten, H., Roelen, W., Boekholt, J.-Th., Turksma, A. and Jessurun, J.
year	1999
title	Virtual Reality in the Design Studio: The Eindhoven Perspective
doi	https://doi.org/10.52842/conf.ecaade.1999.169
source	Architectural Computing from Turing to 2000 [eCAADe Conference Proceedings / ISBN 0-9523687-5-7] Liverpool (UK) 15-17 September 1999, pp. 169-177
summary	Since 1991 Virtual Reality has been used in student projects in the Building Information Technology group. It started as an experimental tool to assess the impact of VR technology in design, using the environment of the associated Calibre Institute. The technology was further developed in Calibre to become an important presentation tool for assessing design variants and final design solutions. However, it was only sporadically used in student projects. A major shift occurred in 1997 with a number of student projects in which various computer technologies including VR were used in the whole of the design process. In 1998, the new Design Systems group started a design studio with the explicit aim to integrate VR in the whole design process. The teaching effort was combined with the research program that investigates VR as a design support environment. This has lead to increasing number of innovative student projects. The paper describes the context and history of VR in Eindhoven and presents the current set-UP of the studio. It discusses the impact of the technology on the design process and outlines pedagogical issues in the studio work.
keywords	Virtual Reality, Design Studio, Student Projects
series	eCAADe
email
last changed	2022/06/07 07:54

_id	ddssar0201
id	ddssar0201
authors	Achten, H.H.
year	2002
title	Requirements for Collaborative Design in Architecture
source	Timmermans, Harry (Ed.), Sixth Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings Avegoor, the Netherlands), 2002
summary	The concept of collaborative design has recently come under renewed attention in the field of computer aided architectural design support. Although collaborative design deals with the same aspects of cooperation by various participants in the design process as previously studiedin, for example, concurrent engineering and multi-disciplinary design, it nevertheless puts a different research emphasis. Collaborative design looks at how the process can be improved in such a way that collaboration –working together in a manner to enhance each participants contribution to the design– emerges from the process. In engineering design practice, thismeans a shift forward in the design process where engineers are asked earlier for their input in the design solution. For CAAD research, the phenomenon of collaborative design poses the question how design tools and environments can be made in such a way that collaboration will occur. In this paper, the aims is to describe the concept of collaborative design in architecture, and to give an outline of the perceived requirements in the organisation of design and Computer Aided Design Support to achieve collaborative design.
series	DDSS
last changed	2003/11/21 15:15

_id	ddssar9601
id	ddssar9601
authors	Achten, H.H., Bax, M.F.Th. and Oxman, R.M.
year	1996
title	Generic Representations and the Generic Grid: Knowledge Interface, Organisation and Support of the (early) Design Process
source	Timmermans, Harry (Ed.), Third Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings (Spa, Belgium), August 18-21, 1996
summary	Computer Aided Design requires the implementation of architectural issues in order to support the architectural design process. These issues consist of elements, knowledge structures, and design processes that are typical for architectural design. The paper introduces two concepts that aim to define and model some of such architectural issues: building types and design processes. The first concept, the Generic grid, will be shown to structure the description of designs, provide a form-based hierarchical decomposition of design elements, and to provide conditions to accommodate concurrent design processes. The second concept, the Generic representation, models generic and typological knowledge of building types through the use of graphic representations with specific knowledge contents. The paper discusses both concepts and will show the potential of implementing Generic representations on the basis of the Generic grid in CAAD systems.
series	DDSS
last changed	2003/11/21 15:15

_id	1dfa
id	1dfa
authors	Achten, H.H., de Vries, B. and Hennessey, J. (eds.)
year	2001
title	DESIGN RESEARCH IN THE NETHERLANDS 2000 - PROCEEDINGS OF THE SYMPOSIUM, EINDHOVEN MAY 25-26 2000
source	Eindhoven: Eindhoven University of Technology
series	book
type	symposium
email
more	http://www.designresearch.nl/PDF/DRN2000_AchtenDeVriesHennessey_Proceedings.pdf
last changed	2005/10/12 15:28

_id	f3a9
id	f3a9
authors	Achten, H.H., de Vries, B. and Hennessey, J.
year	2001
title	DESIGN RESEARCH IN THE NETHERLANDS 2000
source	Achten, H.H., de Vries, B. and Hennessey, J. (eds). Design Research in the Netherlands 2000, i-vi
series	book
type	normal paper
email
more	http://www.designresearch.nl/PDF/DRN2000_AchtenDeVriesHennessey_Introduction.pdf
last changed	2005/10/12 15:42

_id	e322
id	e322
authors	Achten, H.H., Dorst, K., Stappers, P.J. and de Vries, B.
year	2005
title	A DECADE OF DESIGN RESEARCH IN THE NETHERLANDS
source	Achten, H.H., Dorst, K. Stappers, P.J. and de Vries, B. (eds.) Design Research in the Netherlands 2005, i-vii
series	book
type	normal paper
email
more	http://www.designresearch.nl/PDF/DRN2005_AchtenDorstStapperDeVries_Introduction.pdf
last changed	2005/10/12 15:52

_id	7897
authors	Achten, Henri and De Vries, Bauke
year	2001
title	Multiple Sketch Users in DDDoolz
source	Stellingwerff, Martijn and Verbeke, Johan (Eds.), ACCOLADE - Architecture, Collaboration, Design. Delft University Press (DUP Science) / ISBN 90-407-2216-1 / The Netherlands, pp. 153-162 [Book ordering info: m.c.stellingwerff@bk.tudelft.nl]
summary	This paper presents DDDoolz, a desktop-VR three-dimensional voxel sketchtool. DDDoolz is developed in the Design Systems Group to explore the use of Virtual Reality technology in the early design stage. The aim is to offer a sketch-like environment in VR with an unobtrusive interface. The paper presents DDDoolz, how it is used in education and with partners in architectural practice, and some future developments. As an extension to current functionality, the possibility of multiple users at the same time will be developed in the system for the {ACCOLADE} workshop.
series	other
email
last changed	2001/09/14 21:30

_id	ba50
authors	Achten, Henri and Jessurun, Joran
year	2002
title	An Agent Framework for Recognition of Graphic Units in Drawings
doi	https://doi.org/10.52842/conf.ecaade.2002.246
source	Connecting the Real and the Virtual - design e-ducation [20th eCAADe Conference Proceedings / ISBN 0-9541183-0-8] Warsaw (Poland) 18-20 September 2002, pp. 246-253
summary	Architects use graphic conventions in their drawings that have meaningful content to the design task. In previous work, such well-defined sets of graphic entities have been identified and defined. These sets are called graphic units. In this paper, we discuss how graphic unit recognition in drawings can take place using a multi-agent systems approach. This approach seems promising as singular agents may specialize in graphic unit-recognition, and multi-agent systems can address problems of ambiguity through negotiation mechanisms. We present an agent framework for this purpose, how it connects to the theory of graphic units, and how agents for recognizing graphic units are defined. The paper ends with a discussion of current findings and future work.
series	eCAADe
email
last changed	2022/06/07 07:54

_id	cf2003_m_006
id	cf2003_m_006
authors	ACHTEN, Henri and JESSURUN, Joran
year	2003
title	Learning From Mah Jong - Towards a Multi-Agent System that can Recognize Graphic Units
source	Digital Design - Research and Practice [Proceedings of the 10th International Conference on Computer Aided Architectural Design Futures / ISBN 1-4020-1210-1] Tainan (Taiwan) 13–15 October 2003, pp. 115-124
summary	Sketching is a major means of exploiting the first conceptual developments in architectural design. If we want to support the architect in the ideas-developing phase of design, then we need to understand the conventions of depiction and encoding in drawings. The theory of graphic units provides an extended list of such conventions that are widely used. We propose that a multi-agent system for recognition of graphic units in drawings is fruitful: agents can specialize in graphic units, a multi-agent system can deal with ambiguity through negotiation and conflict resolution, and multi-agent systems function in dynamically changing environments. We first make a multi-agent system that can do something simpler: playing Mah Jong solitary. The Mah Jong solitary system shares the following important features with a multi-agent system that can recognize graphic units: (1) specialized agents for moves; (2) negotiation between agents to establish the best move; (3) dynamically changing environment; and (4) search activity in more advanced strategies. The paper presents the theoretical basis of graphic units and multi-agents systems. The multi-agent framework and its implementation is presented. Various levels of game play are distinguished, and these are correlated to the multi-agent system. The paper shows how the findings form the basis for graphic unit recognition.
keywords	artificial intelligence, games, graphic units, agents
series	CAAD Futures
email
last changed	2003/11/22 16:39

_id	ecaade03_269_43_achten
id	ecaade03_269_43_achten
authors	Achten, Henri and Joosen, Gijs
year	2003
title	The Digital Design Process - Reflections on a Single Design Case
doi	https://doi.org/10.52842/conf.ecaade.2003.269
source	Digital Design [21th eCAADe Conference Proceedings / ISBN 0-9541183-1-6] Graz (Austria) 17-20 September 2003, pp. 269-274
summary	CAD tools are increasing their expressive and geometric power to enable a design process in which the computer model can be used throughout the whole design process for realizing the design. Such a process, in which other media such as physical scale models or drawings are no longer required by necessity to facilitate the design process, can be considered a digital design process. Rather than proposing that such a process is ideal – drawings and scale models should not be discarded – we feel that when taken as a starting point, the digital design process raises a number of new challenges to architectural design that deserve attention. These challenges concern the basic activities in design: exploration of the problem space, creating preliminary solutions, understanding consequences of design decisions, and so forth. In this paper we take the concrete design case of a graduation project that was developed from the start solely in CAD. We identify a number of key issues in that process such as continuous modeling, the model as design, continuous pliability, localized focus, and postponed decision. These issues not only have a technical, CAD-related aspect, but also are connected to architectural design. Most of these aspects are subject of contemporary debate in architectural design. On this basis, we can indicate where CAD is making a potential difference in architectural design.
keywords	Digital design, CAAD
series	eCAADe
email
more	http://www.ds.arch.tue.nl/General/Staff/henri
last changed	2022/06/07 07:54

_id	2005_287
id	2005_287
authors	Achten, Henri and Reymen, Isabelle
year	2005
title	Structured Reflection as a Means to Deepen Understanding of CAAD
doi	https://doi.org/10.52842/conf.ecaade.2005.287
source	Digital Design: The Quest for New Paradigms [23nd eCAADe Conference Proceedings / ISBN 0-9541183-3-2] Lisbon (Portugal) 21-24 September 2005, pp. 287-294
summary	In this paper we outline a strategy of structured reflection to improve reflection by students in a course on the implication of CAAD, design theory, and design methodology. Earlier editions of the course showed that students often did not evolve their learning beyond a checklist level. Reflection is an important mechanism to improve learning from design situations. After a consideration of the main approaches to design reflection, we take up Schön’s notion of reflection and provide support for structured reflection in CAAD education, based on earlier experiences with structured question lists in a civil engineering course. Findings after the first year’s run show a deeper level of reflection on a more elaborate level.
keywords	Structured Reflection, CAAD, Education
series	eCAADe
email
last changed	2022/06/07 07:54

_id	e719
authors	Achten, Henri and Turksma, Arthur
year	1999
title	Virtual Reality in Early Design: the Design Studio Experiences
source	AVOCAAD Second International Conference [AVOCAAD Conference Proceedings / ISBN 90-76101-02-07] Brussels (Belgium) 8-10 April 1999, pp. 327-335
summary	The Design Systems group of the Eindhoven University of Technology started a new kind of design studio teaching. With the use of high-end equipment, students use Virtual Reality from the very start of the design process. Virtual Reality technology up to now was primarily used for giving presentations. We use the same technology in the design process itself by means of reducing the time span in which one gets results in Virtual Reality. The method is based on a very brief cycle of modelling in AutoCAD, assigning materials in 3DStudio Viz, and then making a walkthrough in Virtual Reality in a standard landscape. Due to this cycle, which takes about 15 seconds, the student gets immediate feedback on design decisions which facilitates evaluation of the design in three dimensions much faster than usual. Usually the learning curve of this kind of software is quite steep, but with the use of templates the number of required steps to achieve results is reduced significantly. In this way, the potential of Virtual Reality is not only explored in research projects, but also in education. This paper discusses the general set-up of the design studio and shows how, via short workshops, students acquire knowledge of the cycle in a short time. The paper focuses on the added value of using Virtual Reality technology in this manner: improved spatial reasoning, translation from two-dimensional to three-dimensional representations, and VR feedback on design decisions. It discusses the needs for new design representations in this design environment, and shows how fast feedback in Virtual Reality can improve the spatial design at an early stage of the design process.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	75a8
authors	Achten, Henri H.
year	1997
title	Generic representations : an approach for modelling procedural and declarative knowledge of building types in architectural design
source	Eindhoven University of Technology
summary	The building type is a knowledge structure that is recognised as an important element in the architectural design process. For an architect, the type provides information about norms, layout, appearance, etc. of the kind of building that is being designed. Questions that seem unresolved about (computational) approaches to building types are the relationship between the many kinds of instances that are generally recognised as belonging to a particular building type, the way a type can deal with varying briefs (or with mixed use), and how a type can accommodate different sites. Approaches that aim to model building types as data structures of interrelated variables (so-called ‘prototypes’) face problems clarifying these questions. The research work at hand proposes to investigate the role of knowledge associated with building types in the design process.Knowledge of the building type must be represented during the design process. Therefore, it is necessary to find a representation which supports design decisions, supports the changes and transformations of the design during the design process, encompasses knowledge of the design task, and which relates to the way architects design. It is proposed in the research work that graphic representations can be used as a medium to encode knowledge of the building type. This is possible if they consistently encode the things they represent; if their knowledge content can be derived, and if they are versatile enough to support a design process of a building belonging to a type.A graphic representation consists of graphic entities such as vertices, lines, planes, shapes, symbols, etc. Establishing a graphic representation implies making design decisions with respect to these entities. Therefore it is necessary to identify the elements of the graphic representation that play a role in decision making. An approach based on the concept of ‘graphic units’ is developed. A graphic unit is a particular set of graphic entities that has some constant meaning. Examples are: zone, circulation scheme, axial system, and contour. Each graphic unit implies a particular kind of design decision (e.g. functional areas, system of circulation, spatial organisation, and layout of the building). By differentiating between appearance and meaning, it is possible to define the graphic unit relatively shape-independent.If a number of graphic representations have the same graphic units, they deal with the same kind of design decisions. Graphic representations that have such a specifically defined knowledge content are called ‘generic representations.’ An analysis of over 220 graphic representations in the literature on architecture results in 24 graphic units and 50 generic representations. For each generic representation the design decisions are identified. These decisions are informed by the nature of the design task at hand. If the design task is a building belonging to a building type, then knowledge of the building type is required. In a single generic representation knowledge of norms, rules, and principles associated with the building type are used. Therefore, a single generic representation encodes declarative knowledge of the building type. A sequence of generic representations encodes a series of design decisions which are informed by the design task. If the design task is a building type, then procedural knowledge of the building type is used.By means of the graphic unit and generic representation, it is possible to identify a number of relations that determine sequences of generic representations. These relations are: additional graphic units, themes of generic representations, and successive graphic units. Additional graphic units defines subsequent generic representations by adding a new graphic unit. Themes of generic representations defines groups of generic representations that deal with the same kind of design decisions. Successive graphic units defines preconditions for subsequent or previous generic representations. On the basis of themes it is possible to define six general sequences of generic representations. On the basis of additional and successive graphic units it is possible to define sequences of generic representations in themes. On the basis of these sequences, one particular sequence of 23 generic representations is defined.The particular sequence of generic representations structures the decision process of a building type. In order to test this assertion, the particular sequence is applied to the office building type. For each generic representation, it is possible to establish a graphic representation that follows the definition of the graphic units and to apply the required statements from the office building knowledge base. The application results in a sequence of graphic representations that particularises an office building design.Implementation of seven generic representations in a computer aided design system demonstrates the use of generic representations for design support. The set is large enough to provide additional weight to the conclusion that generic representations map declarative and procedural knowledge of the building type.
series	thesis:PhD
email
more	http://alexandria.tue.nl/extra2/9703788.pdf
last changed	2003/11/21 15:15

_id	6d88
authors	Achten, Henri H. and Van Leeuwen, Jos P.
year	1999
title	Feature-Based High Level Design Tools - A Classification
source	Proceedings of the Eighth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-8536-5] Atlanta, 7-8 June 1999, pp. 275-290
summary	The VR-DIS project aims to provide design support in the early design stage using a Virtual Reality environment. The initial brief of the design system is based on an analysis of a design case. The paper describes the process of analysis and extraction of design knowledge and design concepts in terms of Features. It is demonstrated how the analysis has lead to a classification of design concepts. This classification forms one of the main specifications for the VR-based design aid system that is being developed in the VR-DIS programme. The paper concludes by discussing the particular approach used in the case analysis and discusses future work in the VR-DIS research programme.
keywords	Features, Feature-Based modelling, Architectural Design, Design Process, Design Support
series	CAAD Futures
email
last changed	2006/11/07 07:22

_id	ijac20031103
id	ijac20031103
authors	Achten, Henri H.
year	2003
title	New Design Methods for Computer Aided Architectural Design Methodology Teaching
source	International Journal of Architectural Computing vol. 1 - no. 1
summary	Architects and architectural students are exploring new ways of design using Computer Aided Architectural Design software. This exploration is seldom backed up from a design methodological viewpoint. In this paper, a design methodological framework for reflection on innovate design processes by architects that has been used in an educational setting is introduced.The framework leads to highly specific, weak design methods, that clarify the use of the computer in the design process.The framework allows students to grasp new developments, use them in their own design work, and to better reflect on their own position relative to CAAD and architectural design.
series	journal
email
more	http://www.multi-science.co.uk/ijac.htm
last changed	2007/03/04 07:08

_id	ijac20097404
id	ijac20097404
authors	Achten, Henri H.
year	2009
title	Experimental Design Methods - A Review
source	International Journal of Architectural Computing vol. 7 - no. 4, 505-534
summary	Experimental design methods are applied in all phases of the design process and by almost every party involved in the design process. In this paper, we aim to give an overview of the background, applications, and technologies involved. A limited simple metric is introduced for assessing the degree of innovation. Future developments are outlined.
series	journal
last changed	2010/09/06 08:02

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