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	b784
authors	Krishnamurti, R. and Earl, C.F.
year	1992
title	Shape recognition in three dimensions
source	Environment and Planning B: Planning and Design 19 : 585-603
summary	The subshape recognition problem for three-dimensional shapes under linear transformations is considered. The problem is analysed in a series of cases, some that provide a determinate number of solutions and others that have indeterminately many solutions. Procedures for its solution for general shapes are developed. Difficulties posed by strict adherence to rational transformations are examined. As a corollary, an outline of a procedure for determining the symmetries of a shape is presented. Subject
series	journal paper
last changed	2003/04/23 15:14

_id	8cf3
authors	Müller, Volker
year	1992
title	Reint-Ops: A Tool Supporting Conceptual Design
source	Mission - Method - Madness [ACADIA Conference Proceedings / ISBN 1-880250-01-2] 1992, pp. 221-232
doi	https://doi.org/10.52842/conf.acadia.1992.221
summary	Reasoning is influenced by our perception of the environment. New aspects of our environment help to provoke new thoughts. Thus, changes of what is perceived can be assumed to stimulate the generation of new ideas, as well. In CAD, computerized three-dimensional models of physical entities are produced. Their representation on the monitor is determined by our viewing position and by the rendering method used. Especially the wire-frame representations of views lend themselves to a variety of readings, due to coincident and intersecting lines. Methods by which wire-frame views can be processed to extract the shapes that they contain have been investigated and developed. The extracted shapes can be used as a base for the generation of derived entities through various operations that are called Reinterpretation Operations. They have been implemented as a prototypical extension (named Reint-Ops) to an existing modeling shell. ReintOps is a highly interactive exploratory CAD tool, which allows the user to customize criteria and factors which are used in the reinterpretation process. This tool can be regarded as having a potential to support conceptual design investigations.
keywords	CAD, Three-dimensional Model, Wireframe Representation, Shape Extraction, Generation of Derived Entities, Reinterpretation, Conceptual Design
series	ACADIA
email
last changed	2022/06/07 07:59

_id	acadia03_036
id	acadia03_036
authors	Gerzso, J. Michael
year	2003
title	On the Limitations of Shape Grammars: Comments on Aaron Fleisher’s Article “Grammatical Architecture?”
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 279-287
doi	https://doi.org/10.52842/conf.acadia.2003.279
summary	Shape grammars were introduced by Gips and Stiny in 1972. Since then, there have been many articles and books written by them and their associates. In 1992, Aaron Fleisher, a professor at the School of Planning, MIT, wrote a critique of their work in an article titled “Grammatical Architecture?” published in the journal Environment and Planning B. According to him, Gips, Stiny and later Mitchell, propose a hypothesis that states that shape grammars are presumed to represent knowledge of architectural form, that grammars are “formable,” and that there is a visual correspondence to verbal grammar. The strong version of “the hypothesis requires that an architectural form be equivalent to a grammar.” Fleisher considers these hypotheses unsustainable, and argues his case by analyzing the differences between language, and architecture, and by dealing with the concepts of lexicons, syntax and semantics. He concludes by stating that architectural design is negotiated in two modalities: the verbal and the visual, and that equivalences are not at issue; they do not exist. If there is such thing as a language for design, it would provide the means to maintain a discussion of the consequences in one mode, of the state and conditions of the other. Fleisher’s observations serve as the basis of this paper, a tribute to him, and also an opportunity to present an outline to an alternate approach or hypothesis to shape grammars, which is “nonlinguistic” but “generative,” in the sense that it uses production rules. A basic aspect of this hypothesis is that the only similarity between syntactic rules in language and some rules in architecture is that they are recursive.
series	ACADIA
last changed	2022/06/07 07:51

_id	e7c8
authors	Kalisperis, Loukas N., Steinman, Mitch and Summers, Luis H.
year	1992
title	Design Knowledge, Environmental Complexity in Nonorthogonal Space
source	New York: John Wiley & Sons, 1992. pp. 273-291 : ill. includes bibliography
summary	Mechanization and industrialization of society has resulted in most people spending the greater part of their lives in enclosed environments. Optimal design of indoor artificial climates is therefore of increasing importance. Wherever artificial climates are created for human occupation, the aim is that the environment be designed so that individuals are in thermal comfort. Current design methodologies for radiant panel heating systems do not adequately account for the complexities of human thermal comfort, because they monitor air temperature alone and do not account for thermal neutrality in complex enclosures. Thermal comfort for a person is defined as that condition of mind which expresses satisfaction with the thermal environment. Thermal comfort is dependent on Mean Radiant Temperature and Operative Temperature among other factors. In designing artificial climates for human occupancy the interaction of the human with the heated surfaces as well the surface-to-surface heat exchange must be accounted for. Early work in the area provided an elaborate and difficult method for calculating radiant heat exchange for simplistic and orthogonal enclosures. A new improved method developed by the authors for designing radiant panel heating systems based on human thermal comfort and mean radiant temperature is presented. Through automation and elaboration this method overcomes the limitations of the early work. The design procedure accounts for human thermal comfort in nonorthogonal as well as orthogonal spaces based on mean radiant temperature prediction. The limitation of simplistic orthogonal geometries has been overcome with the introduction of the MRT-Correction method and inclined surface-to-person shape factor methodology. The new design method increases the accuracy of calculation and prediction of human thermal comfort and will allow designers to simulate complex enclosures utilizing the latest design knowledge of radiant heat exchange to increase human thermal comfort
keywords	applications, architecture, building, energy, systems, design, knowledge
series	CADline
last changed	2003/06/02 10:24

_id	181b
authors	Liou, Shuenn-Ren
year	1992
title	A computer-based framework for analyzing and deriving the morphological structure of architectural designs
source	University of Michigan
summary	An approach to the acquisition and utilization of knowledge about the morphological structure of notable orthogonal building plans and other two-dimensional compositions is formulated and tested. This approach consists of two levels of abstraction within which the analysis and comparison of existing designs and the derivation of new designs can be undertaken systematically and efficiently. Specifically, the morphological structure of orthogonal building plans and other two-dimensional compositions is conceived as a language defined by shape grammar and architectural grammar corresponding to the geometric and spatial structures of the compositions. Lines constitute the shape grammar and walls and columns the architectural grammar. A computer program named ANADER is designed and implemented using the C++ object-oriented language to describe feasible compositions. It is argued that the gap between morphological analysis and synthesis is bridged partially because the proposed framework facilitates systematic comparisons of the morphological structures of two-dimensional orthogonal compositions and provides insight into the form-making process used to derive them. As an analytical system, the framework contributes to the generation of new and the assessment of existing morphological knowledge. Specifically, it is demonstrated that it is feasible to specify an existing architectural design by a set of universal rule schemata and the sequence of their application. As a generative system, the framework allows many of the tasks involved in the derivation of two-dimensional orthogonal compositions to be carried out. As well, it promotes the use of analytical results. In conclusion, it is argued that the proposed computer-based framework will provide the research and the educator with increasing opportunities for addressing persistent architectural questions in new ways. Of particular interest to this author are questions concerning the decision-making activities involved in form- and space-making as well as the description, classification, and derivation of architecutural form and space. It is suggested that, at least in reference to the cases examined, but probably also in reference to many other morphological classes, these and other related questions can be addressed systematically, efficiently, and fruitfully by using the proposed framework.
series	thesis:PhD
last changed	2003/02/12 22:37

_id	aba4
authors	Lischinski, D. Tampieri, F. and Greenberg, D.P.
year	1992
title	Discontinuity Meshing for Accurate Radiosity
source	IEEE Computer Graphics & Applications, November 1992, pp.25-38
summary	We discuss the problem of accurately computing the illumination of a diffuse polyhedral environment due to an area light source. We show how umbra and penumbra boundaries and other illumination details correspond to discontinuities in the radiance function and its derivatives. The shape, location, and order of these discontinuities is determined by the geometry of the light sources and obstacles in the environment. We describe an object-space algorithm that accurately reproduces the radiance across a surface by constructing a discontinuity mesh that explicitly represents various discontinuities in the radiance function as boundaries between mesh elements. A piecewise quadratic interpolant is used to approximate the radiance function, preserving the discontinuities associated with the edges in the mesh. This algorithm can be used in the framework of a progressive refinement radiosity system to solve the diffuse global illumination problem. Results produced by the new method are compared with ones obtained using a standard radiosity system.
series	journal paper
last changed	2003/04/23 15:50

_id	83ea
authors	Monreal, Amadeo and De la Puente, Josep M.
year	1992
title	Alternatives to Syntactic Paradigms in CAAD: Using Random Numbers in Layout Generation and Spatial Modeling.
source	CAAD Instruction: The New Teaching of an Architect? [eCAADe Conference Proceedings] Barcelona (Spain) 12-14 November 1992, pp. 497-510
doi	https://doi.org/10.52842/conf.ecaade.1992.497
summary	The paper provides instances of graphic techniques using random numbers in layout generation and spatial modelling. Leaving aside more elaborate methods based on shape grammars and syntactically oriented schemes, direct graphic procedures useful in computer aided architectural design are discussed. Drawings presented show how aleatory input can influence the appearance of computer generated forms.
series	eCAADe
last changed	2022/06/07 07:58

_id	e87d
authors	Schierle, G. Goetz
year	1992
title	Computer Aided Design for Wind and Seismic Forces
source	Mission - Method - Madness [ACADIA Conference Proceedings / ISBN 1-880250-01-2] 1992, pp. 187-194
doi	https://doi.org/10.52842/conf.acadia.1992.187
summary	A computer program, Lateral Design Graphs (LDG), to consider lateral wind and seismic forces in the early design stages, is presented. LDG provides numeric data and graphs to visualize the effect of building height, shape, and framing system on lateral forces. Many critical decisions effecting lateral forces and elements to resist them are made at early design stages. Costly changes or reduced safety may result if they are not considered. For example, building height, shape and configuration impact lateral forces and building safety; so does the placement of shear walls in line with space needs. But the complex and time consuming nature of lateral force design by hand makes early consideration often not practical. Therefore the objectives of LDG are to: 1) visualize the cause and effect of lateral forces; 2) make the design process more transparent; 3) develop informed intuition; 4) facilitate trade-off studies at an early stage; 5) help to teach design for lateral forces.
series	ACADIA
email
last changed	2022/06/07 07:57

_id	c54a
authors	Welch, W. and Witkin, A.
year	1992
title	Variational surface modeling
source	Computer Graphics, 26, Proceedings, SIGGRAPH 92
summary	We present a newapproach to interactivemodeling of freeform surfaces. Instead of a fixed mesh of control points, the model presented to the user is that of an infinitely malleable surface, with no fixed controls. The user is free to apply control points and curves which are then available as handles for direct manipulation. The complexity of the surface's shape may be increased by adding more control points and curves, without apparent limit. Within the constraints imposed by the controls, the shape of the surface is fully determined by one or more simple criteria, such as smoothness. Our method for solving the resulting constrained variational optimization problems rests on a surface representation scheme allowing nonuniform subdivision of B-spline surfaces. Automatic subdivision is used to ensure that constraints are met, and to enforce error bounds. Efficient numerical solutions are obtained by exploiting linearities in the problem formulation and the representation.
series	journal paper
last changed	2003/04/23 15:50

_id	6bff
authors	Coyne, Richard
year	1992
title	The Role of Metaphor in Understanding Computers in Design
source	Mission - Method - Madness [ACADIA Conference Proceedings / ISBN 1-880250-01-2] 1992, pp. 3-11
doi	https://doi.org/10.52842/conf.acadia.1992.003
summary	The study of metaphor provides valuable insights into the workings of thought and understanding. This chapter addresses the important question of what the study of metaphor has to say about technology, the design process and hence the role of computers in design. The conclusion is that design involves the generation of action within a collaborative environment in which there is the free play of metaphor. A recognition of the close relationship between technology and metaphor provides insights into how to evaluate and develop the effective use of computers in design.
series	ACADIA
email
last changed	2022/06/07 07:56

_id	067f
authors	Gantt, Michelle and Nardi, Bonnie A.
year	1992
title	Gardeners and Gurus: Patterns of Cooperation among CAD Users Perspectives on the Design of CollaborativeSystems
source	Proceedings of ACM CHI'92 Conference on Human Factors in ComputingSystems 1992 pp. 107-117
summary	We studied CAD system users to find out how they use the sophisticated customization and extension facilities offered by many CAD products. We found that users of varying levels of expertise collaborate to customize their CAD environments and to create programmatic extensions to their applications. Within a group of users, there is at least one local expert who provides support for other users. We call this person a local developer. The local developer is a fellow domain expert, not a professional programmer, outside technical consultant or MIS staff member. We found that in some CAD environments the support role has been formalized so that local developers are given official recognition, and time and resources to pursue local developer activities. In general, this formalization of the local developer role appears successful. We discuss the implications of our findings for work practices and for software design.
keywords	Cooperative Work; End User Programming
series	other
last changed	2002/07/07 16:01

_id	ddss9202
id	ddss9202
authors	Koutamanis, A. and Mitossi, V.
year	1993
title	Architectural computer vision: Automated recognition of architectural drawings
source	Timmermans, Harry (Ed.), Design and Decision Support Systems in Architecture (Proceedings of a conference held in Mierlo, the Netherlands in July 1992), ISBN 0-7923-2444-7
summary	Computer vision offers the ability to transform digitized drawings into documents that can be used with computer systems. Recognition of digitized drawings can occur at the levels of (a) geometric elements, (b) building elements, and (c) spatial articulation. The last two levels apply not only to digitized images but also to computer-produced ones. The enormous burden placed on the user for inputting and manipulating CAD drawings suggests that automated recognition can add to the capabilities of CAD by making the computer more flexible with respect to inputting design information and more responsive to the actual concerns of the designer.
series	DDSS
last changed	2003/08/07 16:36

_id	3ff5
authors	Abbo, I.A., La Scalea, L., Otero, E. and Castaneda, L.
year	1992
title	Full-Scale Simulations as Tool for Developing Spatial Design Ability
source	Proceedings of the 4rd European Full-Scale Modelling Conference / Lausanne (Switzerland) 9-12 September 1992, Part C, pp. 7-10
summary	Spatial Design Ability has been defined as the capability to anticipate effects (psychological impressions on potential observers or users) produced by mental manipulation of elements of architectural or urban spaces. This ability, of great importance in choosing the appropriate option during the design process, is not specifically developed in schools of architecture and is partially obtained as a by-product of drawing, designing or architectural criticism. We use our Laboratory as a tool to present spaces to people so that they can evaluate them. By means of a series of exercises, students confront their anticipations with the psychological impressions produced in other people. For this occasion, we present an experience in which students had to propose a space for an exhibition hag in which architectural projects (student thesis) were to be shown. Following the Spatial Design Ability Development Model which we have been using for several years, students first get acquainted with the use of evaluation instruments for psychological impressions as well as with research methodology. In this case, due to the short period available, we reduced research to investigate the effects produced by the manipulation of only 2 independents variables: students manipulated first the form of the roof, walls and interiors elements, secondly, color and texture of those elements. They evaluated spatial quality, character and the other psychological impressions that manipulations produced in people. They used three dimensional scale models 1/10 and 1/1.
keywords	Full-scale Modeling, Model Simulation, Real Environments
series	other
email
more	http://info.tuwien.ac.at/efa
last changed	2003/08/25 10:12

_id	ce98
authors	Anderson, Lee
year	1992
title	Virtual Graffiti Three-Dimensional Paint Tools for Conceptual Modeling in Upfront
source	Mission - Method - Madness [ACADIA Conference Proceedings / ISBN 1-880250-01-2] 1992, pp. 127-133
doi	https://doi.org/10.52842/conf.acadia.1992.127
summary	This chapter describes several limitations present in current 3-D programs used for conceptual design and then introduces a new threedimensional paint tool, as implemented in a beta version of Alias Upfront, that attempts to deal with some of those limitations.
series	ACADIA
last changed	2022/06/07 07:54

_id	2cb4
authors	Bille, Pia
year	1992
title	CAD at the AAA
source	CAAD Instruction: The New Teaching of an Architect? [eCAADe Conference Proceedings] Barcelona (Spain) 12-14 November 1992, pp. 279-288
doi	https://doi.org/10.52842/conf.ecaade.1992.279
summary	Teaching computer science at the Aarhus School of Architecture goes back as far as to the beginning of the 80’s, when a few teachers and students were curious towards the new media seeing its great developing perspectives and its possible use in the design of architecture. The curiosity and excitement about technology continued, although the results were modest and the usefulness not a dominant aspect in this early period. In the middle of the 80’s the School of Architecture was given the opportunity by means of state funding to buy the first 10 IBM PC's to run AutoCad among other programmes. Beside this a bigger CAD-system Gable 4D Series was introduced running on MicroVax Workstations. The software was dedicated to drafting buildings in 2 and 3 dimensions - an important task within the profession of architects.
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ddss9219
id	ddss9219
authors	Bourdakis, V. and Fellows, R.F.
year	1993
title	A model appraising the performance of structural systems used in sports hall and swimming pool buildings in greece
source	Timmermans, Harry (Ed.), Design and Decision Support Systems in Architecture (Proceedings of a conference held in Mierlo, the Netherlands in July 1992), ISBN 0-7923-2444-7
summary	The selection of the best performing structural system (among steel, timber laminated, concrete, fabric tents) for medium span (30-50m) sports halls and swimming pools in Greece formed the impetus for this research. Decision-making concerning selection of the structural system is difficult in this sector of construction, as was explained in the "Long Span Structures" conference (November 1990, Athens. Greece). From the literature it has been found that most building appraisals end up at the level of data analysis and draw conclusions on the individual aspects they investigate. These approaches usually focus on a fraction of the problem, examining it very deeply and theoretically. Their drawback is loss of comprehensiveness and ability to draw conclusions on an overall level and consequently being applicable to the existing conditions. Research on an inclusive level is sparse. In this particular research project, an inclusive appraisal approach was adopted, leading to the identification of three main variables: resources, human-user-satisfaction, and technical. Consequently, this led to a combination of purely quantitative and qualitative data. Case studies were conducted on existing buildings in order to assess the actual performance of the various alternative structural systems. This paper presents the procedure followed for the identification of the research variables and the focus on the development of the model of quantification. The latter is of vital importance if the problem of incompatibility of data is to be solved, overall relation of findings is to be achieved and holistic conclusions are to be drawn.
series	DDSS
last changed	2003/11/21 15:16

_id	cef3
authors	Bridges, Alan H.
year	1992
title	Computing and Problem Based Learning at Delft University of Technology Faculty of Architecture
source	CAAD Instruction: The New Teaching of an Architect? [eCAADe Conference Proceedings] Barcelona (Spain) 12-14 November 1992, pp. 289-294
doi	https://doi.org/10.52842/conf.ecaade.1992.289
summary	Delft University of Technology, founded in 1842, is the oldest and largest technical university in the Netherlands. It provides education for more than 13,000 students in fifteen main subject areas. The Faculty of Architecture, Housing, Urban Design and Planning is one of the largest faculties of the DUT with some 2000 students and over 500 staff members. The course of study takes four academic years: a first year (Propaedeuse) and a further three years (Doctoraal) leading to the "ingenieur" qualification. The basic course material is delivered in the first two years and is taken by all students. The third and fourth years consist of a smaller number of compulsory subjects in each of the department's specialist areas together with a wide range of option choices. The five main subject areas the students may choose from for their specialisation are Architecture, Building and Project Management, Building Technology, Urban Design and Planning, and Housing. The curriculum of the Faculty has been radically revised over the last two years and is now based on the concept of "Problem-Based Learning". The subject matter taught is divided thematically into specific issues that are taught in six week blocks. The vehicles for these blocks are specially selected and adapted case studies prepared by teams of staff members. These provide a focus for integrating specialist subjects around a studio based design theme. In the case of second year this studio is largely computer-based: many drawings are produced by computer and several specially written computer applications are used in association with the specialist inputs. This paper describes the "block structure" used in second year, giving examples of the special computer programs used, but also raises a number of broader educational issues. Introduction of the block system arose as a method of curriculum integration in response to difficulties emerging from the independent functioning of strong discipline areas in the traditional work groups. The need for a greater level of selfdirected learning was recognised as opposed to the "passive information model" of student learning in which the students are seen as empty vessels to be filled with knowledge - which they are then usually unable to apply in design related contexts in the studio. Furthermore, the value of electives had been questioned: whilst enabling some diversity of choice, they may also be seen as diverting attention and resources from the real problems of teaching architecture.
series	eCAADe
email
last changed	2022/06/07 07:54

_id	9b34
authors	Butterworth, J. (et al.)
year	1992
title	3DM: A three-dimensional modeler using a head-mounted display
source	Proceedings of the 1992 Symposium on Interactive 3D Graphics (Cambridge, Mass., March 29- April 1, 1992.), 135-138
summary	3dm is a three dimensional (3D) surface modeling program that draws techniques of model manipulation from both CAD and drawing programs and applies them to modeling in an intuitive way. 3dm uses a head-mounted display (HMD) to simplify the problem of 3D model manipulation and understanding. A HMD places the user in the modeling space, making three dimensional relationships more understandable. As a result, 3dm is easy to learn how to use and encourages experimentation with model shapes.
series	other
last changed	2003/04/23 15:50

_id	e1f9
authors	Carini, A., Apollonio, F. And Tolomellia, A.
year	1992
title	RESEARCH ACTIVITY 1990-92 AT THE L.T.N.-OIKOS BOLOGNA: EUROPAN AND BARRIER-FREE BATHROOMS
source	Proceedings of the 4rd European Full-Scale Modelling Conference / Lausanne (Switzerland) 9-12 September 1992, Part A, pp. 31-42
summary	During the three year period 1990-1992, the research activity carried out in the Typological Laboratory has been focused on two specific themes: flexibility and typological innovation in dwelling-areas and features of the bathroom for disabled users. These themes reflect two among the chief subjects calling the attention of the Residential Building Committee of the Ministry of Public Works to which - as everybody knows - the Laboratory is subordinated. Both themes have been approached through specific application pro rams which took as reference points, respectively, the Programm of EUROPAN Competitions and the proposals for bringing up to date.
keywords	Full-scale Modeling, Model Simulation, Real Environments
series	other
type	normal paper
more	http://info.tuwien.ac.at/efa
last changed	2004/05/04 15:29

_id	4bd2
authors	Carrara, G., Kalay, Y.E. and Novembri, G.
year	1992
title	A Computational Framework for Supporting Creative Architectural Design
source	New York: John Wiley & Sons, 1992. pp. 17-34 : ill. includes Bibliography
summary	Design can be considered a process leading to the definition of a physical form that achieves a certain predefined set of performance criteria. The process comprises three distinct operations: (1) Definition of the desired set of performance criteria (design goals); (2) generation of alternative design solutions; (3) evaluation of the expected performances of alternative design solutions, and comparing them to the predefined criteria. Difficulties arise in performing each one of the three operations, and in combining them into a purposeful unified process. Computational techniques were developed to assist each of the three operations. A comprehensive and successful computational design assistant will have to recognize the limitations of current computational techniques, and incorporate a symbiosis between the machine and the human designer. This symbiosis comprises allocating design tasks between the designer and the computer in a manner that is most appropriate for the task at hand. The task allocation must, therefore, be done dynamically, responding to the changing circumstances of the design process. This report proposes a framework for such a symbiotic partnership, which comprises four major components: (1) User interface and design process control; (2) design goals; (3) evaluators; (4) database
keywords	architecture, knowledge base, systems, design process, control
series	CADline
email
last changed	2003/06/02 14:41

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