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

PDF papers
References

Hits 1 to 20 of 3266

Reformat results as: short short into frame detailed detailed into frame

_id	572a
id	572a
authors	Mao-Lin Chiu (ed.)
year	2003
title	CAAD TALKS 2: DIMENSIONS OF DESIGN COMPUTATION
source	Taipei, Taiwan, Garden City Publishing Ltd.
summary	This is the second book of a serial of CAAD Talks publication. In this volume, 17 articles in regarding with the studies in design computation and cognition are compiled. The review of CAAD pioneer work such as H. A. Simon, W. Mitchell, T. Sasada, U. Flemming, J. Gero, O. Akin, G. Schmitt., M. Gross, etc.
keywords	Design computation, CAAD research
type	keynote paper
email
last changed	2004/04/10 12:11

_id	0f76
authors	Balachandran, M. B. and Gero, John S.
year	1986
title	Knowledge-based Design Optimization
source	IAAI'86 Conference. 1986. pp. i:4:1-14
summary	CADLINE has abstract only. Optimization is a well understood process in design domains. A designer formulates the design problem as a single criterion or multicriteria optimization problem and then selects an appropriate optimization algorithm to search for the optimal values for the design variables. The formulation and algorithm selection procedures have been considered to be activities which relied on substantive human knowledge. This paper describes a computer system, OPTIMA, which formulates design optimization problems from a pseudo-English description into canonical algebraic expressions. It then recognizes the formulation and selects appropriate algorithm(s) for their solutions. Finally, it runs the selected algorithm(s) and sends the results to the original descriptions. Areas of expert knowledge involved in carrying out the above tasks are identified. Such knowledge is explicitly encoded in the systems. The basic philosophy and key features of the system are described and are illustrated by examples
keywords	algorithms, expert systems, knowledge base, design, optimization, structures, engineering
series	CADline
email
last changed	2003/06/02 13:58

_id	e220
authors	Balachandran, M.B. and Gero, John S.
year	1986
title	Formulating and Recognizing Engineering Optimization Problems
source	Aus. Conf Mechs. Struct. and Mats (10th : 1986 : Adelaide) edited by G. Sved. pp. 223-228. CADLINE has abstract only.
summary	In applying optimization methodology to engineering design, a considerable amount of knowledge is utilized to construct and solve mathematical design models. However, computer based systems to assist this process have concentrated mainly on the numeric computational aspects of the process. This paper outlines a computer system which uses a knowledge-based systems approach to formulate and recognize design optimization problems. Areas of expert knowledge involved in mathematical design modeling and optimization are identified. Such knowledge is encoded explicitly in the system. An example is presented
keywords	knowledge base, systems, engineering, design, mathematics, modeling, structures
series	CADline
email
last changed	2003/06/02 13:58

_id	a3bd
authors	Beretta Covacivich, N., loannilli, M., Lazzari, M., Scandurra E. and Schiavoni U.
year	1986
title	Urban Planning Computer Aided Methods
doi	https://doi.org/10.52842/conf.ecaade.1986.180
source	Teaching and Research Experience with CAAD [4th eCAADe Conference Proceedings] Rome (Italy) 11-13 September 1986, pp. 180-185
summary	In the practice of urban centers analysis and of urban planning projects, a noticeable aspect is the absence of some essential information required in the planning process due to the natural difficulty to manage the numerous data to process.
series	eCAADe
last changed	2022/06/07 07:54

_id	4361
authors	Bishop, G. and Weimer, D.M.
year	1986
title	Fast Phong Shading
source	Computer Graphics (20) 4 pp. 103-106
summary	Computer image generation systems often represent curved surfaces as a mesh of polygons that are shaded to restore a smooth appearance. Phong shading is a well known algorithm for producing a realistic shading but it has not been used by real-time systems because of the 3 additions, 1 division and 1 square root required per pixel for its evaluation. We describe a new formulation for Phong shading that reduces the amount of computation per pixel to only 2 additions for simple Lambertian reflection and 5 additions and 1 memory reference for Phong's complete reflection model. We also show how to extend our method to compute the specular component with the eye at a finite distance from the scene rather than at infinity as is usually assumed. The method can be implemented in hardware for real-time applications or in software to speed image generation for almost any system.
series	journal paper
last changed	2003/11/21 15:16

_id	8e02
authors	Brown, A.G.P. and Coenen, F.P.
year	2000
title	Spatial reasoning: improving computational efficiency
source	Automation in Construction 9 (4) (2000) pp. 361-367
summary	When spatial data is analysed the result is often very computer intensive: even by the standards of contemporary technologies, the machine power needed is great and the processing times significant. This is particularly so in 3-D and 4-D scenarios. What we describe here is a technique, which tackles this and associated problems. The technique is founded in the idea of quad-tesseral addressing; a technique, which was originally applied to the analysis of atomic structures. It is based on ideas concerning Hierarchical clustering developed in the 1960s and 1970s to improve data access time [G.M. Morton, A computer oriented geodetic database and a new technique on file sequencing, IBM Canada, 1996.], and on atomic isohedral (same shape) tiling strategies developed in the 1970s and 1980s concerned with group theory [B. Grunbaum, G.C. Shephard, Tilings and Patterns, Freeman, New York, 1987.]. The technique was first suggested as a suitable representation for GIS in the early 1980s when the two strands were brought together and a tesseral arithmetic applied [F.C. Holdroyd, The Geometry of Tiling Hierarchies, Ars Combanitoria 16B (1983) 211–244.; S.B.M. Bell, B.M. Diaz, F.C. Holroyd, M.J.J. Jackson, Spatially referenced methods of processing raster and vector data, Image and Vision Computing 1 (4) (1983) 211–220.; Diaz, S.B.M. Bell, Spatial Data Processing Using Tesseral Methods, Natural Environment Research Council, Swindon, 1986.]. Here, we describe how that technique can equally be applied to the analysis of environmental interaction with built forms. The way in which the technique deals with the problems described is first to linearise the three-dimensional (3-D) space being investigated. Then, the reasoning applied to that space is applied within the same environment as the definition of the problem data. We show, with an illustrative example, how the technique can be applied. The problem then remains of how to visualise the results of the analysis so undertaken. We show how this has been accomplished so that the 3-D space and the results are represented in a way which facilitates rapid interpretation of the analysis, which has been carried out.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	45ac
authors	Capitanio, L., Nasoni, M., Piroddi, E., Scandurra, E. and Schiavoni, U.
year	1986
title	Programs for the Representation of the Territorial DataPrograms for the Representation of the Territorial DataPrograms for the Representation of the Territorial Data
doi	https://doi.org/10.52842/conf.ecaade.1986.039
source	Teaching and Research Experience with CAAD [4th eCAADe Conference Proceedings] Rome (Italy) 11-13 September 1986, pp. 39-44
summary	The programs afterwards briefly described, were used during the courses of Urban Planning of the Department of Building Techniques and Environment Control of Engineering Faculty of Rome. Those programs are chiefly directed to didactic use and to optimization of the graphic representation of regional and urban phenomena. Both those programs make use of censual data from ISTAT stored, by Urban Planning courses teachers, on Univac/ 1100 computer in Interdepartmental Center for Scientific Calculus of Rome First University.
series	eCAADe
last changed	2022/06/07 07:54

_id	ecaade1986_000
id	ecaade1986_000
authors	Carrara, Gianfranco (ed.)
year	1986
title	Teaching and Research with CAAD
doi	https://doi.org/10.52842/conf.ecaade.1986
source	4th eCAADe Conference Proceedings, Rome (Italy), 11-13 September 1986, 356 p.
series	eCAADe
last changed	2022/06/07 07:49

_id	a9b1
authors	Cohen, M.F., Greenberg, D.P. and Immel, D.S. (et al)
year	1986
title	An Efficient Radiosity Approach for Realistic Image Synthesis
source	IEEE Computer Graphics and Applications March, 1986. vol. 6: pp. 26-35 : col. ill. includes bibliography.
summary	The radiosity method models the interaction of light between diffusely reflecting surfaces and accurately predicts the global illumination effects. Procedures are now available to simulate complex environments including occluded and textured surfaces. For accurate rendering, the environment must be discretized into a fine mesh, particularly in areas of high intensity gradients. The interdependence between surfaces implies solution techniques which are computationally intractable. This article describes new procedures to predict the global illumination function without excessive computational expense. Statistics indicate the enormous potential of this approach for realistic image synthesis, particularly for dynamic images of static environments
keywords	computer graphics, radiosity, rendering, algorithms
series	CADline
last changed	2003/06/02 14:42

_id	31d5
authors	Delisle, N. and Schwartz, M.
year	1986
title	Neptune: A Hypertext System for CAD Applications
source	Proceedings ofACM SIGMOD International Conference on Management of Data, (Washington D.C., May 28-30 1986) pp. 132-143
summary	Even though many of the essential notions of hypertext were first contained in the description of a "memex," written by Vannevar Bush in 1945, there are today only a few scattered implementatlons of hypertext, let alone any serious use of it in a CAD environment. In what follows, we describe what hypertext is all about We describe a prototype hypertext system, named Neptune, that we have built.
series	other
last changed	2003/04/23 15:50

_id	43a7
authors	Durrett, John H. (ed.)
year	1986
title	Color and the Computer
source	Cambridge, MA: Academic Press Inc., 299 p.
summary	Specific guidelines provide practical knowledge that is easily assimilated. Includes example of color display applications. [includes index]
keywords	Color, Computer Graphics
series	CADline
last changed	1999/02/15 15:20

_id	ecc2
authors	Gero, John S. and Balachandran, M. B.
year	1986
title	Knowledge and Design Decision Processes
source	Berlin: Springer-Verlag, 1986. pp. 343- 352
summary	This paper describes how knowledge engineering techniques can be employed within optimization design decision processes. It commences with a brief discussion about multicriteria design optimization prior to elaborating the use of knowledge within this decision process. Four areas are briefly described-- knowledge as a control mechanism in the generation of the Pareto optimal set, knowledge needed to select alternate generation processes, knowledge which can be induced from the Pareto optimal set, and knowledge needed to recognize optimization models. A system which implements these concepts is presented
keywords	design process, knowledge, representation, optimization, decision making, multicriteria
series	CADline
email
last changed	2003/06/02 10:24

_id	2363
authors	Gross, Mark Donald
year	1986
title	Design as exploring constraints
source	Massachusetts Institute of Technology, Dept. of Architecture
summary	A theory of designing is proposed, developed, and illustrated with examples from the domain of physical form. Designing is seen as the exploration of alternative sets of constraints and of the regions of alternative solutions they bound. Designers with different objectives reach different solutions within the same set of constraints, as do designers with the same objectives operating under different constraints. Constraints represent design rules, relations, conventions, and natural laws to be maintained. Some constraints and objectives are given at the outset of a design but many more are adopted along the way. Varying the constraints and the objectives is part of the design process. The theory accounts for various kinds of expertise in designing: knowledge of particular constraints in a design domain; inference--calculating the consequences of design decisions; preference--using objectives to guide decision-making; and partitioning--skill in dividing a large and complicated design into sets of simpler pieces, and understanding the dependencies between decisions. The ability to manage ambiguity and vagueness is an important aspect of design expertise. A computational model supporting the theory is proposed and its implementation discussed briefly. The constraint explorer, a computational environment for designing based on constraint descriptions is described. We see how the constraint explorer might be used in connection with a simple space- planning problem. The problem is taken from the procedures of the Stichting Architecten Research (S.A.R.), a specific architectural design methodology developed to help architects systematically explore layout variability in alternative floorplan designs. Finally, a selected review of related work in constraint-based programming environments, architectural design methods, and the intersection of the two fields is presented.
series	thesis:PhD
email
more	http://dmg.caup.washington.edu
last changed	2003/03/15 06:49

_id	7f64
authors	Harfmann, A.C., Swerdloff, L.M. and Kalay, Y.E.
year	1986
title	The Terminal Crit
doi	https://doi.org/10.52842/conf.acadia.1986.079
source	ACADIA Workshop ‘86 Proceedings - Houston (Texas - USA) 24-26 October 1986, pp. 79-87
summary	Numerous attempts have been made to develop formal design methods with -the purpose of increasing the predictability, consistency and dissemination of the design process and improving the quality of the objects produced. The ill- structured nature of design, and the perception of design activities as intuitive and experience dependent have frustrated many of the efforts to structure these process. The growing complexity of the built environment and advances in technology have led to a more rigorous effort to understand and externalize creative activities. Computer aided design tools have recently been playing an important role in the evolution of the design process as a rationally defined activity. The use of- computers for drafting, analysis, and 2 or 3 dimensional modeling is rapidly becoming an accepted method in many design schools and practitioners. A next logical step in the externalization of the design process is to endow the computer with the ability to manipulate and critique parts of the design. Under this scenario, the "terminal crit" is redefined to mean critiques that are carried out by both the designer and the computer. The paper presents the rationalization of the design process as a continuum into which CAD has been introduced. The effects of computers on the design process are studied through a specific incorporation of CAD tools into a conventional design studio, and a research project intended to advance the role of CAD in design.
series	ACADIA
email
last changed	2022/06/07 07:49

_id	2ceb
authors	Hearn, Donald and Baker, Pauline M.
year	1986
title	Windowing and Clipping -- - Chapter 6
source	Computer Graphics. Englewood Cliffs, NJ.: Prentice Hall, 1986. pp. 123-141 : ill. includes a short bibliography
summary	Applications programs define pictures in a world coordinate system. This can be any Cartesian coordinate system that a user finds convenient. Pictures defined in world coordinates are then mapped by the graphics system into device coordinates. Typically, a graphics package allows a user to specify which area of the picture definition is to be displayed and where it is to be placed on the display device. A single area could be chosen for display, or several areas could be selected. These areas can be placed in separate display locations, or one area can serve as a small insert into a larger area. This transformation process involves operations for translating and scaling selected areas and for deleting picture parts outside the areas. These operations are referred to as windowing and clipping
keywords	clipping, windowing, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	a833
authors	Jong, M. de
year	1986
title	A Spatial Relational Reference Model (3RM)
source	Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 85-91
summary	In this chapter we hope to provide the reader with an impression of the objective, framework and possibilities of 3RM in the construction industry. In Dutch, 3RM stands for 'Ruimtelijk Relationeel Referentie Model' (Spatial Relational Reference Model). The model could begin to be used as an information-bearer in the building industry within which the specific trade information for each of the building participants could be interrelated, including drafting symbolism, building costs, physical qualities and building regulations. In this way, the model can be used as a means to a more efficient running of the building process and enabling the integration of information, at project level, provided by various building participants. The project should be defined in the same way as is a typical architectural project, whereby the actual development as well as the project management is carried out by architects. For the time being, development is limited to integral use at the design stage, but it also offers sufficient expansion possibilities to be able to function as a new communications model throughout the complete building process. We shall first provide information as to the origin, the objective and the execution of the project. Thereafter, we shall attempt to state the theoretical information problem within the building industry and the solution to this offered through 3RM. Finally, we shall report upon the results of the first phase of the 3RM project.
series	CAAD Futures
last changed	1999/04/03 17:58

_id	e26f
authors	Kalay, Y. (ed.)
year	1987
title	Computability of Design
source	New York: Wiley & Sons
summary	Computer-aided design (CAD) has promised to transform the art and science of architectural design. Yet, despite some significant achievements in the past 3 decades, it has so far failed to do so. This stimulating volume, derived from a symposium held at SUNY, Buffalo in December 1986, explores the reasons why design is so difficult to support by computational means, and what can be done to alleviate this difficulty. Written by an interdisciplinary panel of experts, it presents a varied and comprehensive view of the ways creative design processes can be modelled. The contributors do not all reach the same conclusions, which makes this book lively reading. Topics are arranged into four parts: constructing models of the design process, the computational representation of design knowledge (including spatial information and implicit design intent), methods for computing the design process as a whole (including mathematical programming, expert systems, and shape grammars), and the integration of CAD with traditional design practices.
series	other
last changed	2003/04/23 15:14

_id	a48f
authors	Krishnan, D. and Patnaik, L.M.
year	1986
title	GEODERM : Geometric Shape Design System Using an Entity-Relationship Model
source	Computer Aided Design. May, 1986. vol. 18: pp. 207-218 : ill. includes bibliography and 7 appendixes
summary	GEODERM, a microcomputer-based solid modeler which incorporates the parametric object model, is discussed. The entity-relationship model, which is used to describe the conceptual schema of the geometric database, is also presented. Three of the four modules of GEODERM, which have been implemented are described in some detail. They are the Solid Definition Language (SDL), the Solid Manipulation Language (SML) and the User-System Interface
keywords	CAD, solid modeling, relational database, geometric modeling,parametrization
series	CADline
last changed	2003/06/02 13:58

_id	4875
authors	Kroll, Lucien
year	1986
title	Enseigner L'Informatique aux Architectes?
doi	https://doi.org/10.52842/conf.ecaade.1986.052
source	Teaching and Research Experience with CAAD [4th eCAADe Conference Proceedings] Rome (Italy) 11-13 September 1986, pp. 52-70
summary	Mais ou en est l'architecture? Elle mute. Le grand air frais qui avait été amené par le Mouvement .- Moderne lorsqu'il était jeune, entre les deux guerres et quelques années après la guerre, s'était tiédi et avait fini par servir d'alibi aux pires médiocrités industrielle et bureaucratique: c'était toujours la faute de la Charte d'Athènes... Ceci reposait sur toutes sortes de contre-vérités et de malentendus qui ne sont pas encore tous levés actuellement et sont encore souvent enseignés dans nos écoles.
series	eCAADe
last changed	2022/06/07 07:52

_id	a91c
authors	Meyer, G., Rushmeier, H., Cohen, M., Greenberg, D. and Torrace, K.
year	1986
title	An Experimental Evaluation of Computer Graphics Imagery
source	ACM Transactions on Graphics, 5, No. 1
summary	Accurate simulation of light propagation within an environment and perceptually based imaging techniques are necessary for the creation of realistic images. A physical experiment that verifies the simulation of reflected light intensities for diffuse environments was conducted. Measurements of radiant energy flux densities are compared with predictions using the radiosity method for those physical environments. By using color science procedures the results of the light model simulation are then transformed to produce a color television image. The final image compares favorably with the original physical model. The experiment indicates that, when the physical model and the simulation were viewed through a view camera, subjects could not distinguish between them. The results and comparison of both test procedures are presented within this paper.
series	journal paper
last changed	2003/04/23 15:50

For more results click below: