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	629c
authors	Ball, A. A.
year	1978
title	A Simple Specification of the Parametric Cubic Segment
source	computer Aided Design. Business Press, May, 1978. vol. 10: pp. 181-182
summary	A parametric cubic segment may be specified in many ways but most specifications require quantities peculiar to the parametric representation rather than the geometric properties of the curve segment. This paper shows that a three- dimensional cubic segment is specified completely by its end points, end slopes and one intermediate point
keywords	parametrization, curves, curved surfaces, representation
series	CADline
last changed	2003/06/02 10:24

_id	4697
authors	Griffiths, J.G.
year	1978
title	A Surface Display Algorithm
source	Computer Aided Design. January, 1978. vol. 10: pp. 65-73 : ill. includes bibliography
summary	An algorithm is described for displaying curved surfaces with their hidden parts removed. The algorithm calculates a number of points on a surface at which the surface disappears from view, and joins the points to form a piece-wise smooth `critical boundary'. With a knowledge of this critical boundary, the task of displaying the visible parts of the surface becomes simple
keywords	algorithms, curved surfaces, representation, display, hidden lines, hidden surfaces, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	6635
authors	Scherrer, P.K. and Hillberry, B.M.
year	1978
title	Determining Distance to a Surface Represented in Piecewise Fashion with Surface Patches
source	Computer Aided Design. September, 1978. vol. 10: pp. 320-324 : ill. includes bibliography
summary	A previously reported method for finding the points of intersection of a vector and a parametric surface patch is examined. However, before the point of intersection of a vector and a patch can be determined, it is necessary to find the patch (or patches) on a multipatch surface intersected by the vector. A technique is described for determining the patch or patches intersected by a vector, given the patches intersected by a single plane containing the intersecting vector. Once these have been found, the point of intersection can be determined and the distance to the multipatch surface obtained
keywords	computational geometry, curved surfaces, intersection
series	CADline
last changed	2003/06/02 13:58

_id	6387
authors	Akin, Omer
year	1978
title	How do Architects Design?
source	Artificial Intelligence and Pattern Recognition in Computer Aided Design. North-Holland Publishing Company, 1978. pp. 65-98. includes bibliography
summary	This study is proposes a descriptive model of the design behavior of architects. In the first section a framework for the model is proposed. In the second section the framework is tested against empirical data. 11 information processing mechanisms are observed in the data. Eight of these: information acquisition, problem interpretation, problem representation, solution generation, solution integration, solution evaluation, perception and sketching, are used in developing design solutions. The three remaining mechanisms: design 'plans,' transformation rules and design-symbols, represent the categories of the priori knowledge used in design. In the third section these three knowledge mechanisms are explored in detail using the results of two additional experiments with designers
keywords	design methods, architecture, design process
series	CADline
email
last changed	2003/05/17 10:09

_id	e1e8
authors	Bezier, Pierre E.
year	1978
title	General Distortion of an Ensemble of Biparametric Surfaces
source	computer Aided Design. March, 1978. vol. 10: pp. 116-120 : ill. includes bibliography
summary	When the shape of an object has been numerically defined, it is sometimes necessary to distort it to improve either its technical performance or its aesthetic appearance. After briefly recalling the major properties of space curves and surfaces defined by Bernstein polynomials, it is shown how the result can be automatically obtained by distorting an auxiliary triparametric set of references. The principle of an approximate method for high-order curves and surfaces is explained
keywords	curves, curved surfaces, Bernstein, representation, Bezier, computational geometry
series	CADline
last changed	2003/06/02 13:58

_id	6509
authors	Blinn, J.F.
year	1978
title	Simulation of Wrinkled Surfaces
source	Computer Graphics 12 3. 286-292
summary	Computer generated shaded images have reached an impressive degree of realism with the current state of the art. They are not so realistic, however, that they would fool many people into believing they are real. One problem is that the surfaces tend to look artificial due to their extreme smoothness. What is needed is a means of simulating the surface irregularities that are on real surfaces. In 1973 Ed Catmull introduced the idea of using the parameter values of parametrically defined surfaces to index into a texture definition function which scales the intensity of the reflected light. By tying the texture pattern to the parameter values, the texture is guaranteed to rotate and move with the object. This is good for showing patterns painted on the surface, but attempts to simulate rough surfaces in this way are unconvincing. This paper presents a method of using a texturing function to perform a small perturbation on the direction of the surface normal before using it in the intensity calculations. This process yields images with realistic looking surface wrinkles without the need to model each wrinkle as a separate surface element. Several samples of images made with this technique are included.
series	journal paper
last changed	2003/04/23 15:14

_id	4df6
authors	Cohen, Elaine and Riesenfeld, Richard F.
year	1978
title	An Incompatibility Projector Based on an Interpolant of Gregory
source	computer Graphics and Image Processing. 1978. vol. 8: pp. 294-298. includes bibliography
summary	This paper develops an 'incompatibility Projector' Qm, which is an intrinsically bivariate projector that is not the composition of two univariate projectors. Then it employs Qm to manifest a recent rational interpolant due to Gregory in projector form as a triple Boolean sum. This creates a mold for additional compatibility projectors which yield interpolants to functions that do not meet the ordinary compatibility constraints required for Boolean sum interpolation
keywords	algorithms, computational geometry, curves, curved surfaces, mathematics, theory
series	CADline
last changed	2003/06/02 10:24

_id	0bd5
authors	Dube, R., Herron, G.J. and Little, F.F. (et al)
year	1978
title	SURFED -- An Interactive Editor for Free-Form Surfaces
source	Computer Aided Design. March, 1978. vol. 10: pp. 111-115 : ill. includes bibliography
summary	An editor is described for creating and modifying free-form surfaces. A modular system was developed in order to provide the researchers with a facility for communicating design ideas and new mathematical forms through an interactive graphical interface to a computer based model. To achieve this it was necessary to invent a new graphical construct called a `spider' for inputing three-dimensional parameters. This experimental system has the essential features of a large- scale implementation, with the capability of utilizing many new surface forms that have not yet been tried in actual applications
keywords	curved surfaces, computer graphics, user interface
series	CADline
last changed	2003/06/02 13:58

_id	2b4b
authors	Giloi, Wolfgang K.
year	1978
title	Interactive Computer Graphics : Data Structure, Algorithms, Languages
source	xiii, 354 p. : ill
summary	Englewood Cliffs, New Jersey: Prentice-Hall, Inc., 1978. includes bibliography: p. 320-329 and indexes. Part 1 is devoted to data structures and algorithms: an introduction to the subject and chapters on data structure, data bases, and list handling; picture structure and picture transformations; interpolation of curves and surfaces; and rendering of surfaces and solids. Part 2 emphasizes languages and their interpreters: interactive handling, the display processor, display file and picture file organization, language concepts for interactive computer graphics, and high level language implementation of display programming systems
keywords	computer graphics, algorithms, data structures, languages, database, transformation, curves, curved surfaces, solids, user interface
series	CADline
last changed	2003/06/02 13:58

_id	25c4
authors	Henderson, Hazel
year	1978
title	Creating Alternative Futures
source	New York: Putnam
summary	Creating Alternative Futures has pioneered many debates on how to guide industrial societies on healthier paths toward more equitable, ecologically sustainable human development. Henderson explains how GNP distorts the goal of human development worldwide. She points out misleading assumptions and a redefinition of health, wealth, and progress for humanity's long-term survival. The book predicts the sweep of democratization and the new "third sector" of grassroots globalists.
series	other
last changed	2003/04/23 15:14

_id	6373
authors	Schatz, Bruce R.
year	1978
title	The Computation of Immediate Texture Discrimination
source	11 p. : [4] p. of ill. Pittsburgh, PA: Department of Computer Science, CMU, 1978. CMU-CS-78-152. includes bibliography
summary	One approach to understanding human texture discrimination is to consider what image properties should be examined by a system which computes it. This is investigated in a domain of line drawings. It appears that the orientation and length of lines should be examined. However, there exist textures in which these properties are identical yet discrimination occurs. Consideration of virtual lines (imaginary lines between special points) is introduced to explain such textures. The relation of this method to that of Julesz is discussed with the conclusion that it is strictly less powerful. This lack of sensitivity appears to be psychologically correct; instances are given of indiscriminable textures with different second-order statistics but identical (equivalent) actual and virtual lines. An implementation of the computation is sketched
keywords	psychology, drawings, image processing, perception
series	CADline
last changed	2003/06/02 10:24

_id	20c1
authors	Alavalkama, Ilkka
year	1993
title	Technical Aspects of the Urban Simulator in Tampere University of Technology
source	Endoscopy as a Tool in Architecture [Proceedings of the 1st European Architectural Endoscopy Association Conference / ISBN 951-722-069-3] Tampere (Finland), 25-28 August 1993, pp. 35-46
summary	The colour video recording Urban Simulator in TUT was built very early compared with the development of video systems. A contract for planning the simulator electronics, mechanics and camera systems was made in january 1978 with two TUT students: Jani Granholm (computer science and engineering) and Ilkka Alavalkama (machine design and automation). Ease of control and maintenance were asked by side of ”human movement inside coloured small-scale architectural models”. From the beginning, all components of the system were carefully tested and chosen from various alternatives. Financial resources were quite limited, which lead to a long building process and to self-planned and produced mechanical and electronical elements. Some optical systems were constructed by using elements from various manufacturers.
keywords	Architectural Endoscopy
series	EAEA
more	http://info.tuwien.ac.at/eaea/
last changed	2005/09/09 10:43

_id	898a
authors	Bay, J.H.
year	2002
title	Cognitive Biases and Precedent Knowledge in Human and Computer-Aided Design Thinking
source	CAADRIA 2002 [Proceedings of the 7th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 983-2473-42-X] Cyberjaya (Malaysia) 18–20 April 2002, pp. 213-220
doi	https://doi.org/10.52842/conf.caadria.2002.213
summary	Cognitive biases (illusions) and potential errors can occur when using precedent knowledge for analogical, pre-parametric and qualitative design thinking. This paper refers largely to part of a completed research (Bay 2001) on how heuristic biases, discussed by Tversky and Kahneman (1982) in cognitive psychology, can affect judgement and learning of facts from precedents in architectural design, made explicit using a kernel of conceptual system (Tzonis et. al., 1978) and a framework of architectural representation (Tzonis 1992). These are used here to consider how such illusions and errors may be transferred to computer aided design thinking.
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	e671
authors	Bentley, Jon L., Haken, Dorothea and Saxe, James B.
year	1978
title	A General Method for Solving Divide-and-Conquer Recurrences
source	10 p Carnegie Mellon University: December, 1978. includes bibliography.
summary	The complexity of divide-and-conquer algorithms is often described by recurrence relations of the form T(n) = kT(n/c) + f(n). The only method currently available for solving such recurrences consists of solution tables for fixed functions f and varying k and c. In this note the authors describe a unifying method for solving these recurrences that is both general in applicability and easy to apply without the use of large tables
keywords	recursion, algorithms, divide-and-conquer
series	CADline
last changed	2003/06/02 13:58

_id	0fd5
authors	Borkin, Harold J., McIntosh, John F. and Turner, James A.
year	1978
title	The Development of Three-Dimensional Spatial Modeling Techniques for the Construction of Nuclear Power Plants
source	SIGGRAPH-ACM Quarterly Report. August, 1978. pp. 26-30 : ill. includes bibliography
summary	This paper presents the results of the first phase of a research project on the application of spatial modeling techniques to the process of planning and executing the construction of a nuclear power plant. A computer modeling technique, based on sets of polyhedra and spatial set operations, was developed and applied to modeling the components of a nuclear power plant. The objectives of the modeling are: To store and retrieve information about the various systems in the facility; to produce drawings of those systems from any angle in differing amounts of detail; to aid in the search for interference among the parts of the plant by identifying those elements that occupy the same space or are too close to each other; to calculate information such as surface area, length, and volume of selected elements of the plant; and to aid in finding the optimum construction sequence by simulating the construction of selected areas of the plant. Computer techniques are described for inputing information by digitizing directly from engineering drawings, for editing the spatial model, for management of the spatial and non-spatial data, and for graphic output from the model. The software is implemented on the University central time- sharing computer system and on a mini-computer system in the Architectural Research Laboratory
keywords	geometric modeling, polyhedra, relational database, construction, synthesis, evaluation, design, applications
series	CADline
last changed	2003/06/02 13:58

_id	0189
authors	Brodlie, K.W. (editor)
year	1980
title	Mathematical Methods in Computer Graphics and Design
source	xi, 147 p. : ill. New York: Academic Press, 1980. includes subject index
summary	Based on the proceeding of the conference on mathematical methods in computer graphics and design, organized by the Institute of Mathematics and Its Applications and held at the university of Leicester on september 28th, 1978
keywords	algorithms, geometric modeling, techniques, computer graphics, mathematics
series	CADline
last changed	2003/06/02 13:58

_id	471f
authors	Brooks, Frederick P. Jr.
year	1987
title	Essence and Accidents of Software Engineering
source	IEEE Computer. April, 1987. vol. 20: pp. 10-19 : ill. includes bibliography. -- See also Information Processing '86 edited by H.J. Kugler; and Brooks, F.P. 'The Mythical Man-Month,' Addison-Wesley, 1978
summary	The author analyzed the nature and the problems of software engineering and assessed the technical developments that are most often advanced as potential solutions for the problems
keywords	software, programming, languages, management
series	CADline
last changed	2003/06/02 10:24

_id	35a7
authors	Brown, André G.P.
year	2001
title	Architectural critique through digital scenariobuilding. Augmenting Architectural Criticism and Narrative
source	Proceedings of the Ninth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-7023-6] Eindhoven, 8-11 July 2001, pp. 697-709
summary	As an idea scenario-building has parallels the use of creative faking in related disciplines, most particularly, in contemporary art. The techniques involved in scenario-building and faking offer us enhanced ways of undertaking creative thinking and critical review of architecture and architectural projects. Critical review and theoretical analysis of architecture can be undertaken via a range of methods that Attoe (1978) classifies as Normative, Interpretive and Descriptive. Digital representation now offers us new ways of augmenting these critical styles in ways that have yet to be fully exploited, and possible means of exploitation are illustrated in this paper. In short the work described here shows how digital techniques can be used to enrich architectural investigation, critical reporting and debate.
keywords	Digital Recreation, Scenario-Building, Narrative, Fake, Architectural Critique
series	CAAD Futures
email
last changed	2006/11/07 07:22

_id	b780
authors	Chomsky, N.
year	1978
title	Syntactic structures
source	The Hague : Mouton
summary	Noam Chomsky's first book on syntactic structures is one of the first serious attempts on the part of a linguist to construct within the tradition of scientific theory-construction a comprehensive theory of language which may be understood in the same sense that a chemical, biological theory is understood by experts in those fields. It is not a mere reorganization of the data into a new kind of library catalogue, nor another specualtive philosophy about the nature of man and language, but rather a rigorus explication of our intuitions about our language in terms of an overt axiom system, the theorems derivable from it, explicit results which may be compared with new data and other intuitions, all based plainly on an overt theory of the internal structure of languages; and it may well provide an opportunity for the application of explicity measures of simplicity to decide preference of one form over another form of grammar.
series	other
type	normal paper
last changed	2007/04/30 08:13

_id	sigradi2023_90
id	sigradi2023_90
authors	Codarin, Sara and Daubmann, Karl
year	2023
title	Rom[AI]nterrotta
source	García Amen, F, Goni Fitipaldo, A L and Armagno Gentile, Á (eds.), Accelerated Landscapes - Proceedings of the XXVII International Conference of the Ibero-American Society of Digital Graphics (SIGraDi 2023), Punta del Este, Maldonado, Uruguay, 29 November - 1 December 2023, pp. 705–716
summary	This contribution presents the outcomes of a three-credit elective course offered at Lawrence Technological University’s College of Architecture and Design that involved a week-long travel experience in Rome with undergraduate and graduate students. The course used on-the-fly digital synthetic creations with AI text-to-image and image-to-image generation. The students collectively produced a disciplinary design-fiction tour book for a futuristic Rome, integrated into the city's historical layers. Inspired by the 1978 Roma Interrotta/Interrupted Rome project, the students reimagined the city using AI-informed storytelling to create altered narratives that explored common themes and critical insights. The digital tools allowed students to seamlessly blend AI-generated ideas with photos from the tour, linking historical contexts and contemporary design proposals. The critical use of AI served as a valuable tool in this process, educating designers on the importance of site-specific considerations and capturing the essence of a place through innovative creations informed by their experiences.
keywords	AI, Text-to-Image, Storytelling, Travel Experience, Rome
series	SIGraDi
email
last changed	2024/03/08 14:07

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