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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	4fee
authors	Chen, Hou I and Liou, Shuenn Ren
year	1996
title	A Configuration-Generating Method Based on a Lattice System
source	CAADRIA ‘96 [Proceedings of The First Conference on Computer Aided Architectural Design Research in Asia / ISBN 9627-75-703-9] Hong Kong (Hong Kong) 25-27 April 1996, pp. 199-215
doi	https://doi.org/10.52842/conf.caadria.1996.199
summary	In this paper, I would propose a configuration-generating method: "L grammars”. Relating to Turing machine, cellular automata, tiling problem and Wang tile theory. It is named Lgrammars”. L grammars base on an infinite lattice space (usually a chess-board-like lattice plane) is a bottom-up approach, in which each cell of a lattice system corresponds to a bounded configuration unit. Thus, a lattice plane would corresponds to a configuration union. The power of L grammars is demonstrated by generating various configurations such as fractal images (two dimensional examples) and crystal models (three dimensional examples). Finally, it would be discussed briefly about some interesting issues concerning about L grammars such as the limitations of L grammars.
series	CAADRIA
last changed	2022/06/07 07:55

_id	af53
authors	Boyer, E. and Mitgang, L.
year	1996
title	Building community: a new future for architecture education and practice
source	Carnegie Foundation for the Advancement of Teaching
summary	Internships, before and after graduation, are the most essential link connecting students to the world of practice. Yet, by all accounts, internship is perhaps the most troubled phase of the continuing education of architects. During this century, as architectural knowledge grew more complex, the apprenticeship system withered away and schools assumed much of the responsibility for preparing architects for practice. However, schools cannot do the whole job. It is widely acknowledged that certain kinds of technical and practical knowledge are best learned in the workplace itself, under the guidance of experienced professionals. All state accrediting boards require a minimum period of internship-usually about three years-before a person is eligible to take the licensing exam. The National Council of Architectural Registration Boards (NCARB) allows students to earn up to two years of work credit prior to acquisition of an accredited degree. The Intern Development Program (IDP), launched by NCARB and the American Institute of Architects in 1979, provides the framework for internship in some forty states. The program was designed to assure that interns receive adequate mentoring, that experiences are well-documented, and that employers and interns allocate enough time to a range of educational and vocational experiences to prepare students for eventual licensure. As the IDP Guidelines state, "The shift from school to office is not a transition from theory to pragmatism. It is a period when theory merges with pragmatism.... It's a time when you: apply your formal education to the daily realities of architectural practice; acquire comprehensive experience in basic practice areas; explore specialized areas of practice; develop professional judgment; continue your formal education in architecture; and refine your career goals." Whatever its accomplishments, however, we found broad consensus that the Intern Development Program has not, by itself, solved the problems of internship. Though we found mutually satisfying internship programs at several of the firms we visited or heard about around the country, at many others interns told us they were not receiving the continuing education and experience they needed. The truth is that architecture has serious, unsolved problems compared with other fields when it comes to supplying on-the-job learning experiences to induct students into the profession on a massive scale. Medicine has teaching hospitals. Beginning teachers work in actual classrooms, supported by school taxes. Law offices are, for the most part, in a better financial position to support young lawyers and pay them living wages. The architecture profession, by contrast, must support a required system of internship prior to licensure in an industry that has neither the financial resources of law or medicine, the stability and public support of teaching, nor a network of locations like hospitals or schools where education and practice can be seamlessly connected. And many employers acknowledged those problems. "The profession has all but undermined the traditional relationship between the profession and the academy," said Neil Frankel, FAIA, executive vice president of Perkins & Will, a multinational firm with offices in New York, Chicago, Washington, and London. "Historically, until the advent of the computer, the profession said, 'Okay, go to school, then we in the profession will teach you what the real world is like.' With the coming of the computer, the profession needed a skill that students had, and has left behind the other responsibilities." One intern told us she had been stuck for months doing relatively menial tasks such as toilet elevations. Another intern at a medium-sized firm told us he had been working sixty to seventy hours per week for a year and a half. "Then my wife had a baby and I 'slacked off' to fifty hours. The partner called me in and I got called on the carpet for not working hard enough." "The whole process of internship is being outmoded by economics," one frustrated intern told us. "There's not the time or the money. There's no conception of people being groomed for careers. The younger staff are chosen for their value as productive workers." "We just don't have the best structure here to use an intern's abilities to their best," said a Mississippi architect. "The people who come out of school are really problems. I lost patience with one intern who was demanding that I switch him to another section so that he could learn what he needed for his IDP. I told him, 'It's not my job to teach you. You are here to produce.'" What steps might help students gain more satisfying work opportunities, both during and after graduation?
series	other
last changed	2003/04/23 15:14

_id	acb9
authors	Do, Ellen Yi-Luen
year	1996
title	The Right Tool at the Right Time - Drawing as an Interface to Knowledge Based Design Aids
source	Design Computation: Collaboration, Reasoning, Pedagogy [ACADIA Conference Proceedings / ISBN 1-880250-05-5] Tucson (Arizona / USA) October 31 - November 2, 1996, pp. 191-199
doi	https://doi.org/10.52842/conf.acadia.1996.191
summary	Designers use different symbols and diagrams in their drawings to explore alternatives and to communicate with each other. Therefore, a useful design environment should attempt to infer the designer's intentions from the drawing and, based on this inference, suggest appropriate computational tools for the task at hand. For example, a layout bubble diagram might activate design cases with similar configurations. Scribbles of view lines on a floor plan might bring up a spatial analysis tool. This research aims to develop an integrated digital sketching environment to support early design activities. The paper proposes RT, an intelligent sketch environment that provides the designers with the right tools at the right time.
series	ACADIA
email
last changed	2022/06/07 07:55

_id	ddss2006-hb-187
id	DDSS2006-HB-187
authors	Lidia Diappi and Paola Bolchi
year	2006
title	Gentrification Waves in the Inner-City of Milan - A multi agent / cellular automata model based on Smith's Rent Gap theory
source	Van Leeuwen, J.P. and H.J.P. Timmermans (eds.) 2006, Innovations in Design & Decision Support Systems in Architecture and Urban Planning, Dordrecht: Springer, ISBN-10: 1-4020-5059-3, ISBN-13: 978-1-4020-5059-6, p. 187-201
summary	The aim of this paper is to investigate the gentrification process by applying an urban spatial model of gentrification, based on Smith's (1979; 1987; 1996) Rent Gap theory. The rich sociological literature on the topic mainly assumes gentrification to be a cultural phenomenon, namely the result of a demand pressure of the suburban middle and upper class, willing to return to the city (Ley, 1980; Lipton, 1977, May, 1996). Little attempt has been made to investigate and build a sound economic explanation on the causes of the process. The Rent Gap theory (RGT) of Neil Smith still represents an important contribution in this direction. At the heart of Smith's argument there is the assumption that gentrification takes place because capitals return to the inner city, creating opportunities for residential relocation and profit. This paper illustrates a dynamic model of Smith's theory through a multi-agent/ cellular automata system approach (Batty, 2005) developed on a Netlogo platform. A set of behavioural rules for each agent involved (homeowner, landlord, tenant and developer, and the passive 'dwelling' agent with their rent and level of decay) are formalised. The simulations show the surge of neighbouring degradation or renovation and population turn over, starting with different initial states of decay and estate rent values. Consistent with a Self Organized Criticality approach, the model shows that non linear interactions at local level may produce different configurations of the system at macro level. This paper represents a further development of a previous version of the model (Diappi, Bolchi, 2005). The model proposed here includes some more realistic factors inspired by the features of housing market dynamics in the city of Milan. It includes the shape of the potential rent according to city form and functions, the subdivision in areal submarkets according to the current rents, and their maintenance levels. The model has a more realistic visualisation of the city and its form, and is able to show the different dynamics of the emergent neighbourhoods in the last ten years in Milan.
keywords	Multi agent systems, Housing market, Gentrification, Emergent systems
series	DDSS
last changed	2006/08/29 12:55

_id	ddssar9627
id	ddssar9627
authors	Sariyildiz, S., Schwenck, M. and Jander, E.
year	1996
title	Multimedia Teachware in the Field of Architectural Design
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	Software systems for educational purposes have been developed and used in many application areas. In this paper we will describe a development in the field of building science. ClAD is a teachware system directed to be used in the education of students of architecture as well as a tool that gives a survey to architects and engineers in the practice. In the first place it provides information about the use of computer science technologies in the building design process. Furthermore, information about the architectural design process itself is included. Based on an analysis of general requirements and specific demands of the application field we describe our solution concept. Very important conclusions are that the system has to integrate the use of all media which are usually used by architects by offering a flexible and well-designed user interface and allowing a high degree of interactive work. After covering the development process as a combination of top down and bottom up strategies we describe the overall structure of ClAD as a modular system which can be extended and updated easily. Finally, we give an overview about some parts of the system to demonstrate the implementation of the concepts mentioned above.
series	DDSS
last changed	2003/08/07 16:36

_id	4931
authors	Breen, Jack
year	1996
title	Learning from the (In)Visible City
source	Education for Practice [14th eCAADe Conference Proceedings / ISBN 0-9523687-2-2] Lund (Sweden) 12-14 September 1996, pp. 65-78
doi	https://doi.org/10.52842/conf.ecaade.1996.065
summary	This paper focuses on results and findings of an educational project, in which the participating students had to develop a design strategy for an urban plan by using and combining endoscopic and computational design visualisation techniques. This educational experiment attempted to create a link between the Media research programme titled 'Dynamic Perspective' and an educational exercise in design composition. It was conceived as a pilot study, aimed at the investigation of emerging applications and possible combinations of different imaging techniques which might be of benefit in architectural and urban design education and potentially for the (future) design practice. The aim of this study was also to explore the relationship between spatial perception and design simulation. The point of departure for the student exercise was an urban masterplan which the Dynamic Perspective research team prepared for the workshop 'the (in)visible city' as part of the 1995 European Architectural Endoscopy Association Conference in Vienna, Austria. The students taking part in the exercise were asked to develop, discuss and evaluate proposals for a given part of this masterplan by creating images through different model configurations using optical and computer aided visualisation techniques besides more traditional design media.The results of this project indicate that an active and combined use of visualisation media at a design level, may facilitate communication and lead to a greater understanding of design choices, thus creating insights and contributing to design decision-making both for the designers and for the other participants in the design process.
series	eCAADe
email
more	http://www.bk.tudelft.nl/Media/
last changed	2022/06/07 07:54

_id	ffe2
authors	Carrar, G., Luna, F. and Rajchman, A.
year	1999
title	Cúpulas Telefónicas - Mobiliario Urbano, Diseño Industrial aplicado a una empresa de servicios (Telephone Cupolas - Urban Furniture, Industrial Design Applied to a Company of Services)
source	III Congreso Iberoamericano de Grafico Digital [SIGRADI Conference Proceedings] Montevideo (Uruguay) September 29th - October 1st 1999, pp. 426-409
summary	By november 1996, the state telecomunication company called for a national booth design contest. The idea was to use the awarded design shortly as part of the renovation of the public phone service. Gruppo MDM won the design contest and was contracted to do the manufacture technical drawings and a prototype which was tested during 1997. By 1997, an international bid was held, including the awarded project. Gruppo MDM was contracted for the follow up of the manufacture process, including research of suppliers worldwide, materials arriving on time with the quality required, verifying local suppliers with deadlines and quality controlls according to the specifications.
series	SIGRADI
email
last changed	2016/03/10 09:48

_id	6c40
authors	Colajanni, B., Martelli, T. and Pellitteri, G.
year	1996
title	A Tool for the Analysis of the Behaviour of Building Components: The Cellular Automation
source	Education for Practice [14th eCAADe Conference Proceedings / ISBN 0-9523687-2-2] Lund (Sweden) 12-14 September 1996, pp. 99-110
doi	https://doi.org/10.52842/conf.ecaade.1996.099
summary	An implementation of a cellular automation is presented that allows the simulation of the behaviour of building components under diverse environment conditions. The tool has a wide range of applications because of the generality of its structure. The object on which it operates is represented as a set of cells each of which is defined, besides its geometrical dimension and position, by a set of variables and parameters. The work it performs consists in computing transitions from a state to another, i.e. the values variables and parameters take in each cell under the action of external agents and of internal laws of interaction between self As an example of its use an application is shown analysing the thermal behaviour of the connection of a curtain wall to a concrete floor.
series	eCAADe
email
last changed	2022/06/07 07:56

_id	ddssar9605
id	ddssar9605
authors	Dijkstra, J., Roelen, W.A.H. and Timmermans, H.J.P.
year	1996
title	Conjoint measurement in virtual environment: a framework
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	Conjoint analysis (also called stated preference analysis) involves the use of designed hypothetical choice situations to measure individuals' preferences and predict their choice in new situations. Conjoint experiments involve the design and analysis of hypothetical decision tasks. Alternatives are described by their main features, called attributes. Multiple hypothetical alternatives (product profiles) are generated and presented to respondents, who are requested to express their degree of preference for these profiles. Conjoint experiments have become a popular tool to model individual preferences and decision-making in a variety of research areas. Most studies of conjoint analysis have involved a verbal description of product profiles, although some studies have used a pictorial presentation of product profiles. This paper describes a framework for a conjoint analysis system in a virtual environment. Product profiles are generated in a virtual environment and respondents are requested to choose in that virtual environment the product profile they prefer. Advantages of a virtual environment in this area of research include 3D presentation, improved experience and the possibility to include measurable attributes such as time and sound. This framework is a first attempt to explore the possibilities of virtual reality systems in conjoint analysis.
series	DDSS
last changed	2003/08/07 16:36

_id	ebd6
authors	Dobson, Adrian
year	1996
title	Teaching Architectural Composition Through the Medium of Virtual Reality Modelling
source	Approaches to Computer Aided Architectural Composition [ISBN 83-905377-1-0] 1996, pp. 91-102
summary	This paper describes an experimental teaching programme to enable architectural students in the early years of their undergraduate study to explore their understanding of the principles of architectural composition, by the creation and experience of architectural form and space in simple virtual reality environments. Principles of architectural composition, based upon the ordering and organisation of typological architectural elements according to established rules of composition, are introduced to the students, through the study of recognised works of architectural design theory. Virtual reality modelling is then used as a tool by the students for the testing and exploration of these theoretical concepts. Compositional exercises involving the creation and manipulation of a family of architectural elements to create form and space within a three dimensional virtual reality environment are carried out using Superscape VRT, a PC based virtual reality modelling system. The project seeks to bring intuitive and immersive computer based design techniques directly into the context of design theory teaching and studio practice, at an early stage in the architectural education process.
series	other
last changed	1999/04/08 17:16

_id	90a7
authors	Eastman, C.M.
year	1996
title	Managing Integrity in Design Information Flows
source	Computer Aided Design (May, 1996). 28:6n, pp. 551-565
summary	The purpose of this work is to develop automatic methods of semantic integrity maintenance, in support of concurrent engineering. Semantic integrity relations in any final engineering design are built up incrementally, through the use of different computer applications. Here, the structure of these integrity relations are formalized for representation within a database. When changes to a design have to be made, they can invalidate integrity relations in other parts of the design. Formal methods are defined for identifying what data and integrity relations are invalidated by any change. Methods for making changes that minimize re-design are described and formalized. Opportunities for using semantic integrity to assess progress on a design are reviewed.
series	journal paper
email
last changed	2003/04/23 15:14

_id	ec0e
authors	Engeli, M. and Kurmann, D.
year	1996
title	A Virtual Reality Design Environment with Intelligent Objects and Autonomous Agents
source	H.J.P. Timmermans (ed.), Design and Decision Support Systems in Architecture and Urban Planning Conference, Vol. 1: Architecture Proceedings, pp. 132-142
summary	New technological achievements and research results allow for the creation of innovative design tools for architects, that do not originate from paper-based paradigms but instead make optimised use of the present technology and programming concepts. The core of our system is comprised of an intuitive interactive modelling tool. It runs in a virtual reality set-up, where the user can use 3D glasses to experience rooms and 3D input devices to model in three dimensions. The interface is free from widget-like buttons or menus, so that the user is undisturbed when moving into the virtual world of the design. The system can also run in a distributed fashion, so that a number of users can look at and modify the same design. The 3D model can be generated in a sketch-like fashion using solids and voids, void modelling turns out to be very valuable for architectural design. The objects in this system can contain forms of intelligence to produce such behaviour as: falling because of gravity, collision avoidance, and autonomous motion. Interactive behaviour can also be assigned to the objects. Autonomous Agents are added to the system to enhance the designer support. These are agents that enhance the virtual environment, agents that take over tasks, and agents that help to test the design. The system shows new interface and interaction approaches that support the architectural design process intelligently.
series	other
last changed	2003/04/23 15:50

_id	ddssar9609
id	ddssar9609
authors	Engeli, Maia and Kurmann, David
year	1996
title	A Virtual Reality Design Environment with Intelligent Objects and Autonomous Agents
source	Timmermans, Harry (Ed.), Third Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings (Spa, Belgium), August 18-21, 1996
summary	New technological achievements and research results allow for the creation of innovative design tools for architects, that do not originate from paper-based paradigms but instead make optimised use of the present technology and programming concepts. The core of our system is comprised of an intuitive interactive modelling tool. It runs in a virtual reality set-up, where the user can use 3D glasses to expe-rience rooms and 31) input devices to model in three dimensions. The interface is free from widget-like buttons or menus, so that the user is undisturbed when moving into the virtual world of the design. The system can also run in a distributed fashion, so that a number of users can look at and modify the same design. The 31) model can be generated in a sketch-like fashion using solids and voids, void modelling turns out to be very valuable for architectural design. The objects in this system can contain forms of intelligence to produce such behaviour as: falling because of gravity, collision avoidance, and autonomous motion. Interactive behaviour can also be assigned to the objects. Autonomous Agents are added to the system to enhance the designer support. These are agents that enhance the virtual environment, agents that take over tasks, and agents that help to test the design. The system shows new interface and interaction approaches that support the architectural design process intelligently.
series	DDSS
last changed	2003/08/07 16:36

_id	ecaade2024_230
id	ecaade2024_230
authors	Fekar, Hugo; Novák, Jan; Míèa, Jakub; Žigmundová, Viktória; Suleimanova, Diana; Tsikoliya, Shota; Vasko, Imrich
year	2024
title	Fabrication with Residual Wood through Scanning Optimization and Robotic Milling
source	Kontovourkis, O, Phocas, MC and Wurzer, G (eds.), Data-Driven Intelligence - Proceedings of the 42nd Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2024), Nicosia, 11-13 September 2024, Volume 1, pp. 25–34
doi	https://doi.org/10.52842/conf.ecaade.2024.1.025
summary	The project deals with the use of residual wood of tree stumps and roots through scanning, optimization and robotic milling. Wood logging residue makes up to 50 percent of the trees harvested biomass. (Hakkila and Parikka 2002). Among prevailing strategies is leaving residue on site, and recovering residue for bioenergy. (Perlack and others 2005). The project explores the third strategy, using parts of the logging residue for fabrication, which may reduce the overall amount of wood logging volume. Furthermore approach aims for applying residue in its natural form and taking advantage of specific local characteristics of wood (Desch and Dinwoodie 1996). The project applies the strategy on working with stump and roots of an oak tree. Due to considerations of scale, available milling technics and available resources, chosen goal of the approach is to create a functioning chair prototype. Among the problems of the approach is the complex shape of the residue, uneven quality of wood, varying humidity and contamination with soil. After cleaning and drying, the stump is scanned and a 3D model is created. The 3D model od a stump is confronted with a 3D modelled limits of the goal typology (height, width, length, sitting surface area and overal volume of a chair) and topological optimization algorithm is used to iteratively reach the desired geometry. Unlike in established topological optimization proces, which aims for a minimal volume, the project attempts to achieve required qualities with removing minimal amount of wood. Due to geometric complexity of both stump and goal object, milling with an 6axis industrial robotic arm and a rotary table was chosen as a fabrication method. The object was clamped to the board (then connected to a rotary table) in order to provide precise location and orientation in 3D space. The milling of the object was divided in two parts, with the seating area milled in higher detail. Overall process of working with a residual wood that has potential to be both effective and present aesthetic quality based on individual characteristics of wood. Further development can integrate a generative tool which would streamline the design and fabrication proces further.
keywords	Robotic arm milling, Scanning, Residual wood
series	eCAADe
email
last changed	2024/11/17 22:05

_id	6598
authors	Goldman, Glenn
year	1996
title	Reconstructions, Remakes and Sequels: Architecture and Motion Pictures
source	Design Computation: Collaboration, Reasoning, Pedagogy [ACADIA Conference Proceedings / ISBN 1-880250-05-5] Tucson (Arizona / USA) October 31 - November 2, 1996, pp. 11-21
doi	https://doi.org/10.52842/conf.acadia.1996.011
summary	Motion pictures can illustrate worlds that have never been. They may show fantastic depictions of the future or an interpretation of the past. In either case, they have the power to reach millions of people across cultures, generations, and educational backgrounds with visions of our environment that do not exist in our everyday world. The study of imaginary worlds in this design studio case study is limited to motion pictures that postulate unique, or new environments rather than those films that faithfully attempt to document or reconstruct reality. In this sense, the movies used for study have a lineage traceable to Georges Melies "who came to film from illusionism and the "heater," rather than to the reality of the Lumiere brothers who came from photography which ultimately would lead to "cinema-verite." Discussions, assignments and presentations in the studio are organized to provide students with an opportunity to gain a different awareness of architecture and use varying stimuli as source material for design. The study of architectural history, art, formal principles of design, visual perception, and media are required in order to complete the reconstructions and creations of proposed environments. All student work throughout the entire semester is created with electronic media and the computer is used as an integral component of the studio enabling analysis and study, design, model creation, and animation. The available capabilities of computer graphics in the studio enables students to explore analytic and synthetic issues of design in motion pictures in a manner not readily available when restricted to traditional media. Through the use of digital media we have an opportunity to better understand the imaginary worlds for what they communicate and the ideas they contain, and therefore create an opportunity to modify our own concept of architecture.
series	ACADIA
email
last changed	2022/06/07 07:51

_id	4b71
authors	Gross, M.D.
year	1996
title	Why can't CAD be more like Lego? CKB, a program for building construction kits
source	Automation in Construction 5 (4) (1996) pp. 285-300
summary	The paper describes CKB (Construction Kit Builder), a computational design environment based on defining, then working within, a system of components and rules for their placement. In construction details, the components and placement rules are standard; in less routine design tasks they are not. CKB uses a constraint-based, object oriented, system architecture to provide two levels of design support. At the higher level, designers of technical systems use CKB to specify components and rules for their positioning. At the lower level, building designers use CKB to lay out components of these systems.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	3451
authors	Harrison, Beverly L.
year	1996
title	The Design and Evaluation of Transparent User Interfaces. From Theory to Practice
source	University of Toronto, Toronto
summary	The central research issue addressed by this dissertation is how we can design systems where information on user interface tools is overlaid on the work product being developed with these tools. The interface tools typically appear in the display foreground while the data or work space being manipulated typically appear in the perceptual background. This represents a trade-off in focused foreground attention versus focused background attention. By better supporting human attention we hope to improve the fluency of work, where fluency is reflected in a more seamless integration between task goals, user interface tool manipulations to achieve these goals, and feedback from the data or work space being manipulated. This research specifically focuses on the design and evaluation of transparent user interface 'layers' applied to graphical user interfaces. By allowing users to see through windows, menus, and tool palettes appearing in the perceptual foreground, an improved awareness of the underlying workspace and preservation of context are possible. However, transparent overlapping objects introduce visual interference which may degrade task performance, through reduced legibility. This dissertation explores a new interface technique (i.e., transparent layering) and, more importantly, undertakes a deeper investigation into the underlying issues that have implications for the design and use of this new technique. We have conducted a series of experiments, progressively more representative of the complex stimuli from real task domains. This enables us to systematically evaluate a variety of transparent user interfaces, while remaining confident of the applicability of the results to actual task contexts. We also describe prototypes and a case study evaluation of a working system using transparency based on our design parameters and experimental findings. Our findings indicate that similarity in both image color and in image content affect the levels of visual interference. Solid imagery in either the user interface tools (e.g., icons) or in the work space content (e.g., video, rendered models) are highly interference resistant and work well up to 75% transparent (i.e., 25% of foreground image and 75% of background content). Text and wire frame images (or line drawings) perform equally poorly but are highly usable up to 50% transparent, with no apparent performance penalty. Introducing contrasting outlining techniques improves the usability of transparent text menu interfaces up to 90% transparency. These results suggest that transparency is a usable and promising interface alternative. We suggest several methods of overcoming today's technical challenges in order to integrate transparency into existing applications.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	dba1
authors	Hirschberg, Urs and Wenz, Florian
year	2000
title	Phase(x) - memetic engineering for architecture
source	Automation in Construction 9 (4) (2000) pp. 387-392
summary	Phase(x) was a successful teaching experiment we made in our entry level CAAD course in the Wintersemester 1996/1997. The course was entirely organized by means of a central database that managed all the students' works through different learning phases. This set-up allowed that the results of one phase and one author be taken as the starting point for the work in the next phase by a different author. As students could choose which model they wanted to work with, the whole of Phase(x) could be viewed as an organism where, as in a genetic system, only the "fittest" works survived. While some discussion of the technical set-up is necessary as a background, the main topics addressed in this paper will be the structuring in phases of the course, the experiences we had with collective authorship, and the observations we made about the memes2 that developed and spread in the students' works. Finally we'll draw some conclusions in how far Phase(x) is relevant also in a larger context, which is not limited to teaching CAAD. Since this paper was first published in 1997, we have continued to explore the issues described here in various projects3 together with a growing number of other interested institutions worldwide. While leaving the paper essentially in its original form, we added a section at the end, in which we outline some of these recent developments.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	cf2009_poster_09
id	cf2009_poster_09
authors	Hsu, Yin-Cheng
year	2009
title	Lego Free-Form? Towards a Modularized Free-Form Construction
source	T. Tidafi and T. Dorta (eds) Joining Languages Cultures and Visions: CAADFutures 2009 CD-Rom
summary	Design Media is the tool designers use for concept realization (Schon and Wiggins, 1992; Liu, 1996). Design thinking of designers is deeply effected by the media they tend to use (Zevi, 1981; Liu, 1996; Lim, 2003). Historically, architecture is influenced by the design media that were available within that era (Liu, 1996; Porter and Neale, 2000; Smith, 2004). From the 2D plans first used in ancient egypt, to the 3D physical models that came about during the Renaissance period, architecture reflects the media used for design. When breakthroughs in CAD/CAM technologies were brought to the world in the twentieth century, new possibilities opened up for architects.
keywords	CAD/CAM free-form construction, modularization
series	CAAD Futures
type	poster
last changed	2009/07/08 22:12

_id	b6a7
authors	Jensen, K.
year	1996
title	Coloured Petri Nets: Basic Concepts
source	2nd ed., Springer Verlag, Berlin
summary	This book presents a coherent description of the theoretical and practical aspects of Coloured Petri Nets (CP-nets or CPN). It shows how CP-nets have been developed - from being a promising theoretical model to being a full-fledged language for the design, specification, simulation, validation and implementation of large software systems (and other systems in which human beings and/or computers communicate by means of some more or less formal rules). The book contains the formal definition of CP-nets and the mathematical theory behind their analysis methods. However, it has been the intention to write the book in such a way that it also becomes attractive to readers who are more interested in applications than the underlying mathematics. This means that a large part of the book is written in a style which is closer to an engineering textbook (or a users' manual) than it is to a typical textbook in theoretical computer science. The book consists of three separate volumes. The first volume defines the net model (i.e., hierarchical CP-nets) and the basic concepts (e.g., the different behavioural properties such as deadlocks, fairness and home markings). It gives a detailed presentation of many small examples and a brief overview of some industrial applications. It introduces the formal analysis methods. Finally, it contains a description of a set of CPN tools which support the practical use of CP-nets. Most of the material in this volume is application oriented. The purpose of the volume is to teach the reader how to construct CPN models and how to analyse these by means of simulation. The second volume contains a detailed presentation of the theory behind the formal analysis methods - in particular occurrence graphs with equivalence classes and place/transition invariants. It also describes how these analysis methods are supported by computer tools. Parts of this volume are rather theoretical while other parts are application oriented. The purpose of the volume is to teach the reader how to use the formal analysis methods. This will not necessarily require a deep understanding of the underlying mathematical theory (although such knowledge will of course be a help). The third volume contains a detailed description of a selection of industrial applications. The purpose is to document the most important ideas and experiences from the projects - in a way which is useful for readers who do not yet have personal experience with the construction and analysis of large CPN diagrams. Another purpose is to demonstrate the feasibility of using CP-nets and the CPN tools for such projects. Together the three volumes present the theory behind CP-nets, the supporting CPN tools and some of the practical experiences with CP-nets and the tools. In our opinion it is extremely important that these three research areas have been developed simultaneously. The three areas influence each other and none of them could be adequately developed without the other two. As an example, we think it would have been totally impossible to develop the hierarchy concepts of CP-nets without simultaneously having a solid background in the theory of CP-nets, a good idea for a tool to support the hierarchy concepts, and a thorough knowledge of the typical application areas.
series	other
last changed	2003/04/23 15:14

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