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	cf2009_poster_07
id	cf2009_poster_07
authors	Ashraf, Mohamed-Ahmed and Pierre Côté
year	2009
title	The Impact of Three Cognitive Functions on Digital Media Aided Architectural Ideation: A Proposed Investigation
source	T. Tidafi and T. Dorta (eds) Joining Languages Cultures and Visions: CAADFutures 2009 CD-Rom
summary	From a cognitivist perspective the architectural design seen as an iterative process of search for an “acceptable” solution from initial design assumptions (Simon 1974) requires representation. These representation which may be internal (mental/cognitive activities) and external (sketches 3D models) are essential to any creative act and in all phases of the design process since they constitute a projection of the architect’s thought and know-how.
keywords	Cognitive function, ideation
series	CAAD Futures
type	poster
email
last changed	2009/07/08 22:12

_id	ecaade2022_299
id	ecaade2022_299
authors	Bauscher, Erik, Philipp, Klaus Jan, Reisinger, Stefanie and Wortmann, Thomas
year	2022
title	Reimagining Gego: Geometrical Reconstruction of Nubes, an Undocumented and Lost Sculpture from 1974
source	Pak, B, Wurzer, G and Stouffs, R (eds.), Co-creating the Future: Inclusion in and through Design - Proceedings of the 40th Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2022) - Volume 2, Ghent, 13-16 September 2022, pp. 217–226
doi	https://doi.org/10.52842/conf.ecaade.2022.2.217
summary	This paper describes a method to understand and digitally reconstruct two sculptures by Gertrud Goldschmidt, a German-born, Venezuelan artist also called Gego. Gego is best known for her series of works called “Reticuláres”. These three-dimensional and open installations, mostly hanging freely in space, are playing with the concept and perception of space as well as challenging the definition of the traditional sculpture. The paper aims to generate information about two specific structures called “Nubes” (Clouds for Spanish) to assist in a physical reconstruction for a larger exhibition about Gego and to contribute to understanding Gego’s work process. Originally, the structures were suspended from a building's ceiling as an art installation in Caracas, 1974. There are three main challenges for this reconstruction: (1) The installations exhibit a complex three-dimensional geometry. (2) Scant drawings and photographs exist. (3) Gego might not have followed her initial drawings completely when building Nubes physically, because of the mentioned complexity and due to the light and bendable material properties of the employed material. The paper describes a computational process that recreates the object’s geometry in four steps: (1) Analyse all existing media of the structure. (2) Translate found information to the digital environment of Grasshopper. (3) Use a physical simulation to derive the end state of the hanging structure. (4) Optimize and tune the simulation with an optimization algorithm for better results. This paper demonstrates the usefulness of computational tools for reconstructing lost sculptures with little documentation. In this case, these tools allow a more accurate reconstruction and contribute to a fuller understanding of the design and realization process of Gego's Nubes.
keywords	Geometry Reconstruction, Lost Art, Computational Design, Physics Simulation
series	eCAADe
email
last changed	2024/04/22 07:10

_id	sigradi2008_049
id	sigradi2008_049
authors	Benamy, Turkienicz ; Beck Mateus, Mayer Rosirene
year	2008
title	Computing And Manipulation In Design - A Pedagogical Experience Using Symmetry
source	SIGraDi 2008 - [Proceedings of the 12th Iberoamerican Congress of Digital Graphics] La Habana - Cuba 1-5 December 2008
summary	The concept of symmetry has been usually restricted to bilateral symmetry, though in an extended sense it refers to any isometric transformation that maintains a certain shape invariant. Groups of operations such as translation, rotation, reflection and combinations of these originate patterns classified by modern mathematics as point groups, friezes and wallpapers (March and Steadman, 1974). This extended notion represents a tool for the recognition and reproduction of patterns, a primal aspect of the perception, comprehension and description of everything that we see. Another aspect of this process is the perception of shapes, primary and emergent. Primary shapes are the ones explicitly represented and emergent shapes are the ones implicit in the others (Gero and Yan, 1994). Some groups of shapes known as Semantic Shapes are especially meaningful in architecture, expressing visual features so as symmetry, rhythm, movement and balance. The extended understanding of the concept of symmetry might improve the development of cognitive abilities concerning the creation, recognition and meaning of forms and shapes, aspects of visual reasoning involved in the design process. This paper discusses the development of a pedagogical experience concerned with the application of the concept of symmetry in the creative generation of forms using computational tools and manipulation. The experience has been carried out since 1995 with 3rd year architectural design students. For the exploration of compositions based on symmetry operations with computational support we followed a method developed by Celani (2003) comprising the automatic generation and update of symmetry patterns using AutoCAD. The exercises with computational support were combined with other different exercises in each semester. The first approach combined the creation of two-dimensional patterns to their application and to their modeling into three-dimensions. The second approach combined the work with computational support with work with physical models and mirrors and the analysis of the created patterns. And the third approach combined the computational tasks with work with two-dimensional physical shapes and mirrors. The student’s work was analyzed under aspects such as Discretion/ Continuity –the creation of isolated groups of shapes or continuous overlapped patterns; Generation of Meta-Shapes –the emergence of new shapes from the geometrical relation between the generative shape and the structure of the symmetrical arrangement; Modes of Representation –the visual aspects of the generative shape such as color and shading; Visual Reasoning –the derivation of 3D compositions from 2D patterns by their progressive analysis and recognition; Conscious Interaction –the simultaneous creation and analysis of symmetry compositions, whether with computational support or with physical shapes and mirrors. The combined work with computational support and with physical models and mirrors enhanced the students understanding on the extended concept of symmetry. The conscious creation and analysis of the patterns also stimulated the student’s understanding over the different semantic possibilities involved in the exploration of forms and shapes in two or three dimensions. The method allowed the development of both syntactic and semantic aspects of visual reasoning, enhancing the students’ visual repertoire. This constitutes an important strategy in the building of the cognitive abilities used in the architectural design process.
keywords	Symmetry, Cognition, Computing, Visual reasoning, Design teaching
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	cdb0
authors	Finkel, R. A. and Bentley, Jon L.
year	1974
title	Quad Trees : A Data Structure for Retrieval on Composite Keys
source	Acta Informatica. 1974. vol. 4: pp. 1-9 : ill. includes bibliography
summary	The quad tree is a data structure appropriate for storing information to be retrieved on composite keys. The paper discusses the specific case of two-dimensional retrieval, although the structure is easily generalized to arbitrary dimensions. Algorithms are given both for straightforward insertion and for a type of balanced insertion into quad trees. Empirical analyses show that the average time for insertion is logarithmic with the tree size. An algorithm for retrieval within regions is presented along with data from empirical studies which imply that searching is reasonably efficient. The paper defines an optimized tree and presents an algorithm to accomplish optimization in n log n time. Searching is guaranteed to be fast in optimized trees. Remaining problems include those of deletion from quad trees and merging of quad trees, which seem to be inherently difficult operations
keywords	quadtree, data structures, algorithms, search, sorting
series	CADline
last changed	2003/06/02 13:58

_id	36
authors	González, Carlos Guillermo
year	1998
title	Una TecnologÌa Digital Para el Diseño: El Tde-Ac (A Digital Technology for Design: The Tde-Ac)
source	II Seminario Iberoamericano de Grafico Digital [SIGRADI Conference Proceedings / ISBN 978-97190-0-X] Mar del Plata (Argentina) 9-11 september 1998, pp. 274-279
summary	TDE is a graphic language capable of notation of pure design operations, which offers an alternative to Monge and Perspective drawing. This language which was perfected and developed by Claudio Guerri in the late 80's, is originated in the Theory of Spatial Delimitation of CÈsar Janello (1974-1984). From 1995 onwards, and within the framework of the UBACyT AR025 Project (1995-1997), a software in order to apply the TDE through computer technology started to be developed. This work is carried out within the framework of the research program SPATIAL SEMIOTICS-DESIGN THEORY of the FADU-UBA directed by Claudio Guerri, and is continued in the UBACyT AR01 4 Project (1998-2000) "TDE-AC. Graphic language. TDE computer assisted". The computer tool TDE-AC, adds to this graphic language the power of the processing speed and a certain autonomy of interpretation and execution of design operations, which enables to visualize results with a remarkable speed in relation with manual or intellectual work in front of the drawing table. Trough the amplified projection on the screens of the program the stage of development and effectivity of TDE-AC will be demonstrated.
series	SIGRADI
email
last changed	2016/03/10 09:52

_id	a9c2
authors	Gordon, William J. and Riesenfeld, Richard F.
year	1974
title	Bernstein- Bezier Methods for the Computer-Aided Design of Free-Form Curves and Surfaces
source	Journal of the ACM. April, 1974. vol. 21: pp. 293-310 : ill. includes bibliography
summary	The mth degree Bernstein polynomial approximation to a function f defined over [0,1] is Em-o f(u/m) Ou(s), where the weights Ou(s) are binomial density functions. The Bernstein approximations inherit many of the global characteristics of f, like monotonicity and convexity, and they always are at least as 'smooth' as f, where 'smooth' refers to the number of undulations, the total variation, and the differentiability class of f. Historically, their relatively slow convergence in the Loo-norm has tended to discourage their use in practical applications. However, in a large class of problems the smoothness of an approximating function is of greater importance than closeness of fit. This is especially true in connection with problems of computer-aided geometric design of curves and surfaces where aesthetic criteria and the intrinsic properties of shape are major considerations. For this latter class of problems, P. Bezier of Renault has successfully exploited the properties of parametric Bernstein polynomials. The purpose of this paper is to analyze the Bezier techniques and to explore various extensions and generalizations. In a sequel, the authors consider the extension of the results contained herein to free-form curve and surface design using polynomial splines. These B-spline methods have several advantages over the techniques described in the present paper
keywords	CAD, computer graphics, Bezier, curves, curved surfaces, representation, design, Bernstein, representation, B- splines, user interface, approximation, interpolation
series	CADline
last changed	2003/06/02 13:58

_id	33f9
authors	Richens, P.
year	1974
title	Summary of OXSYS Commands
source	ARC Cambridge
series	other
email
more	http://www.arct.cam.ac.uk/research/pubs/
last changed	2000/03/05 19:05

_id	49ce
authors	Richens, P.
year	1974
title	Proposal for a Combined Drafting and Scheduling System
source	Design Office Consortium, Cambridge
series	other
email
more	http://www.arct.cam.ac.uk/research/pubs/
last changed	2000/03/05 19:05

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