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	4435
authors	Cheatham, Th.E., Townley, J.A. and Holloway, G.H.
year	1979
title	A System for Program Refinement
source	1979. pp. 53-62. includes bibliography
summary	The Program Development System (PDS) is a programming environment, an integrated collection of interactive tools that support the process of program definition, testing, and maintenance. The PDS is intended to aid the development of large programs, especially program families whose members must be maintained in synchrony. The system facilitates implementation by stepwise refinement, and it keeps a refinement history that allows program modifications made at a high level of abstraction to be reflected efficiently and automatically in the corresponding low level code. Analysis tools are used both to support program validation and to guide program refinement
keywords	user interface, software, systems, programming, tools
series	CADline
last changed	2003/06/02 14:41

_id	6b93
authors	Faux, I. D. and Pratt, M.J.
year	1979
title	Computational Geometry for Design and Manufacture
source	331 p. : ill Chichester, England: Ellis Horwood Limited., 1979. includes bibliography: p. 315-326 and index -- (Mathematics & and its Applications series)
summary	Focusing on the mathematical techniques for the representation, analysis and synthesis of 'shape information' by computers. There is a discussion of splines and related means for defining composite curves and 'patched' surfaces, and coverage of both parametric and non-parametric techniques. The book is primarily concerned with the mathematics of the various methods. A good introductory text to surface modeling
keywords	computational geometry, curves, curved surfaces, mathematics
series	CADline
last changed	2003/06/02 13:58

_id	eb8e
authors	Fowler, Robert J. and Little, James J.
year	1979
title	Automatic Extraction of Irregular Network Digital Terrain Models
source	SIGGRAPH '79 Conference Proceedings. August, 1979. vol. 13 ; no. 2: pp. 199- 207 : ill. includes bibliography
summary	For representation of terrain, an efficient alternative to dense grids is the Triangulated Irregular Network (TIN), which represents a surface as a set of non-overlapping contiguous triangular facets, of irregular size and shape. The source of digital terrain data is increasingly dense raster models produced by automated orthophoto machines or by direct sensors such as synthetic aperture radar. A method is described for automatically extracting a TIN model from dense raster data. An initial approximation is constructed by automatically triangulating a set of feature points derived from the raster model. The method works by local incremental refinement of this model by the addition of new points until a uniform approximation of specified tolerance is obtained. Empirical results show that substantial savings in storage can be obtained
keywords	GIS, mapping, computational geometry, data structures, mapping, representation, computer graphics, triangulation
series	CADline
last changed	2003/06/02 13:58

_id	6138
authors	Gerzso, John Michael
year	1979
title	A Descriptive Theory of Architectural Built Form and its Applications
source	University of California, Berkeley
series	thesis:PhD
last changed	2003/02/12 22:37

_id	c584
authors	Gerzso, Miguel J.
year	1979
title	Spacemaker : A Computer Language for Modelling Architectural Physical Form
source	Application of Computers in Architecture, Building Design and Urban Planning, International Conference Proceedings. 1979. pp. 573-582 : ill. includes bibliography
summary	The paper describes a modeling technique of architectural form. The technique is divided into two parts. A diagrammatic production system and a computer language. The production notation serves as a representation of underlying organization of building groups. The computer language -- SPACEMAKER -- facilitates the coding of such rules for computer programming. The particular version of the diagrammatic production system as presented first began by attempting to apply two picture grammars to architectural problems. The first effort was based on PDL developed by Allen Shaw and was called SNARQ I and the second one grew out of work done by Yun-chung Cho and was called SNARQ II. A few years later, these notations evolved into the notation presented after adapting ideas from A. Lindenmeyer. Numerous models of architectural systems were then constructed
keywords	architecture, languages, modeling
series	CADline
last changed	2003/06/02 13:58

_id	a7b0
authors	Gips, J.
year	1979
title	Artificial Intelligence
source	Environment and Planning B. 1979. vol. 6: pp. 353-364 : ill. includes bibliography
summary	The field of artificial intelligence and its subfields of computer vision, games, natural language understanding, speech understanding, mathematics, medicine and robotics is reviewed. The work of George Stiny and the author on design and criticism is discussed briefly in terms of a paradigm of artificial intelligence research
keywords	AI
series	CADline
last changed	2003/06/02 10:24

_id	8e4d
authors	Hartley, P.J. and Judd, C.J.
year	1979
title	Curve and Surface Representations for Bezier B-spline Systems
source	1979? pp. 226- 236 : ill. includes bibliography
summary	The Bezier approach to the computer-aided design of surfaces, using interactive design of curves to construct surface sections, can be implemented using spline curves just as well as the original polynomial curves, and with some advantages. In the paper, some problems are considered that arise when a Bezier system is formulated and describe possible solutions for a spline-based system
keywords	curves, representation, CAD, curved surfaces, B-splines, Bezier,
series	CADline
last changed	2003/06/02 13:58

_id	4966
authors	Kaplan, Michael and Greenberg, Donald P.
year	1979
title	Parallel Processing Techniques for Hidden Surface Removal
source	SIGGRAPH '79 Conference Proceedings. 1979. vol. 13 ; no. 2: pp. 300-307 : ill. includes bibliography
summary	Previous work in the hidden-surface problem has revealed two key concepts. First, the removal of non-visible surfaces is essentially a sorting problem. Second, some form of coherence is essential for the efficient solution of this problem. In order to provide real-time simulations, it is not only the amount of sorting which must be reduced, but the total time required for computation. One potentially economic strategy to attain this goal is the use of parallel processor systems. This approach implies that the computational time will no longer be dependent on the total amount of sorting, but more on the appropriate division of responsibility. This paper investigates two existing algorithmic approaches to the hidden-surface problem with a view towards their applicability to implementation on a parallel machine organization. In particular, the statistical results of a parallel processor implementation indicate the difficulties stemming from a loss of coherence and imply potentially important design criteria for a parallel configuration
keywords	computer graphics, rendering, display, hidden surfaces, parallel processing, algorithms
series	CADline
last changed	2003/06/02 13:58

_id	0b63
authors	Ledgard, H.F., Hueras, J.F. and Nagin, P.A.
year	1979
title	Pascal with Style : Programming Proverbs
source	210 p. : ill. Rochelle Park, New Jersey: Hayden Book Company, Inc., 1979. include bibliography: p. 205-206 and index. -- (Hayden computer programming series)
summary	For PASCAL programmers, it offers short rules and guidelines for writing more accurate, error free programs. Includes many sample of PASCAL programs, introduces superior methods of program design and construction, like how to use the top-down approach
keywords	PASCAL, languages, programming, education
series	CADline
last changed	2003/06/02 14:41

_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	9ffd
authors	Maver, T.W., Smith, M., Watts, J. and Aish, R.
year	1979
title	Implications for Practice and Education
source	Proceedings of PArC 79, (Ed: J Chalmers) Berlin, 221-232
series	other
email
last changed	2003/06/02 15:00

_id	cebc
authors	Rhodes, Michael L.
year	1979
title	An Algorithmic Approach to Controlling Search in Three-Dimensional Image Data
source	SIGGRAPH '79 Conference Proceedings. August, 1979. vol. 13 ; no. 2: pp. 134- 141 : ill. includes bibliography
summary	In many three-dimensional imaging applications random shaped objects, reconstructed from serial sections, are isolated to display their overall structure in a single view. This paper presents an algorithm to control an ordered search strategy for locating all contours of random shaped objects intersected by a series of cross-section image planes. Classic search techniques in AI problem solving and software for image processing and computer graphics are combined here to aid program initialization and automate the search process thereafter. Using three-dimensional region growing, this method isolates all spatially connected pixels forming a structure's volume and enters image planes the least number of times to do so. An algorithmic description is given to generalize the process for controlling search in 3-D image data where little core memory is available. Phantom and medical computer tomographic data are used to illustrate the algorithm's performance
keywords	algorithms, AI, image processing, computer graphics, methods, search
series	CADline
last changed	2003/06/02 10:24

_id	452c
authors	Vanier, D. J. and Worling, Jamie
year	1986
title	Three-dimensional Visualization: A Case Study
source	Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 92-102
summary	Three-dimensional computer visualization has intrigued both building designers and computer scientists for decades. Research and conference papers present an extensive list of existing and potential uses for threedimensional geometric data for the building industry (Baer et al., 1979). Early studies on visualization include urban planning (Rogers, 1980), treeshading simulation (Schiler and Greenberg, 1980), sun studies (Anon, 1984), finite element analysis (Proulx, 1983), and facade texture rendering (Nizzolese, 1980). With the advent of better interfaces, faster computer processing speeds and better application packages, there had been interest on the part of both researchers and practitioners in three-dimensional -models for energy analysis (Pittman and Greenberg, 1980), modelling with transparencies (Hebert, 1982), super-realistic rendering (Greenberg, 1984), visual impact (Bridges, 1983), interference clash checking (Trickett, 1980), and complex object visualization (Haward, 1984). The Division of Building Research is currently investigating the application of geometric modelling in the building delivery process using sophisticated software (Evans, 1985). The first stage of the project (Vanier, 1985), a feasibility study, deals with the aesthetics of the mode. It identifies two significant requirements for geometric modelling systems: the need for a comprehensive data structure and the requirement for realistic accuracies and tolerances. This chapter presents the results of the second phase of this geometric modelling project, which is the construction of 'working' and 'presentation' models for a building.
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	acadia23_v1_136
id	acadia23_v1_136
authors	Alima, Natalia
year	2023
title	InterspeciesForms
source	ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 1: Projects Catalog of the 43rd Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9860805-8-1]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 136-143.
summary	The hybridization of architectural, biological and robotic agencies Situated in the field of architectural biodesign, InterspeciesForms explores a closer relationship between the fungus Pleurotus ostreatus and the designer in the creation of form. The intention of hybridizing mycelia’s agency of growth with architectural design intention is to generate novel, non-indexical crossbred designed outcomes that evolve preconceived notions of architectural form. Mycelium are threadlike fibrous root systems made up of hyphae, that form the vegetative part of a fungus (Jones 2020). Known as the hackers of the wood wide web (Simard 1997) mycelia form complex symbiotic relationships with other species that inhabit our earth. Michael Lim states “Fungi redefine resourcefulness, collaboration, resilience and symbiosis” (Lim 2022, p. 14). When wandering around the forest to connect with other species or searching for food, fungi form elaborate and entangled networks by spreading their hyphal tips. Shown in Figure 1, this living labyrinth results in the aesthetic formation of an intricate web. Due to the organisms ability to determine the most effective direction of growth, communicate with its surrounding ecosystem, and connect with other species, fungi are indeed an intelligent species with a unique aesthetic that must not be ignored. In drawing on these concepts, I refer to the organism’s ability to search for, tangle, and digest its surroundings as ‘mycelia agency of growth’. It is this specific behavioral characteristic that is the focus of this research, with which I, as the architect, set out to co-create and hybridize with.
series	ACADIA
type	project
email
last changed	2024/04/17 13:58

_id	cf08
authors	Blaha, Michael R., Premerlani, William J. and Rumbaugh, James E.
year	1988
title	Relational Database Design Using An Object- Oriented Methodology
source	communications of the ACM. April, 1988. vol. 31: pp. 414-427 : ill. includes a short bibliography
summary	Object-oriented concepts provide a useful abstraction for relational database design. In this article the authors present a design technique that has been used for several projects at General Electric. The methodology is intuitive, expressive, and extensible. The new approach to relational database design is based on the work of Loomis, Sha, and Rumbaugh
keywords	relational database, design, methods, objects, modeling, representation
series	CADline
last changed	2003/06/02 13:58

_id	4202
authors	Brown, Michael E. and Gallimore, Jennie J.
year	1995
title	Visualization of Three-Dimensional Structure During Computer-Aided Design
source	International Journal of Human-Computer Interaction 1995 v.7 n.1 pp. 37-56
summary	The visual image presented to an engineer using a computer-aided design (CAD) system influences design activities such as decision making, problem solving, cognizance of complex relationships, and error correction. Because of the three-dimensional (3-D) nature of the object being created, an important attribute of the CAD visual interface concerns the various methods of presenting depth on the display's two-dimensional (2-D) surface. The objective of this research is to examine the effects of stereopsis on subjects' ability to (a) accurately transfer to, and retrieve from, long-term memory spatial information about 3-D objects; and (b) visualize spatial characteristics in a quick and direct manner. Subjects were instructed to memorize the shape of a 3-D object presented on a stereoscopic CRT during a study period. Following the study period, a series of static trial stimuli were shown. Each trial stimulus was rotated (relative to the original) about the vertical axis in one of six 36° increments between 0° and 180°. In each trial, the subject's task was to determine, as quickly and as accurately as possible, whether the trial object was the same shape as the memorized object or its mirrored image. One of the two cases was always true. To assess the relative merits associated with disparity and interposition, the two depth cues were manipulated in a within-subject manner during the study period and during the trials that followed. Subject response time and error rate were evaluated. Improved performance due to hidden surface is the most convincing experimental finding. Interposition is a powerful cue to object structure and should not be limited to late stages of design. The study also found a significant, albeit limited, effect of stereopsis. Under specific study object conditions, adding disparity to monocular trial objects significantly decreased response time. Response latency was also decreased by adding disparity information to stimuli in the study session.
series	journal paper
last changed	2003/05/15 21:45

_id	b47b
authors	Callender, John Hancock (Ed.)
year	1982
title	Time Saver Standards for Architectural Design Data
source	McGraw Hill Book. Co., Sixth Ed.
summary	From Book News, Inc. The latest version of the venerable reference first published in 1946 and most recently in 1982. Considers such aspects as bioclimate design, life-cycle costing, the building shell, architectural ethics, superstructure, acoustics, construction materials technology, daylighting, environmentally responsible design, and evaluating building performance. A special section features design data formatted according to the Uniformat II classification system, offering easy access to preliminary design and specification by building component, assemble, and place in the system of construction. Useful for any professional in the architecture, design, or construction fields. Book News, Inc.(r), Portland. Book Description Our biggest database of ready-to-use architectural design details ever. A classic reference for over 50 years. Time-Saver Standards for Architectural Design Data, edited by Donald Watson, Michael J. Crosbie, and John Hancock Callender, is the all-in-one desktop database that helps you work faster and smarter with instant design details-ready to incorporate into your architectural drawings the moment you need them. Now in a completely revised and updated seventh edition, this time-saving resource...
series	other
last changed	2003/04/23 15:14

_id	ede5
authors	De J. Ramos Rojas, Yajaira
year	2001
title	TÉCNICAS DE MODELADO DE BASES DE DATOS GEO-REFERENCIADOS O ESPACIALES (Modeling Techniques of Geo-Referenced Data Bases or Space)
source	SIGraDi biobio2001 - [Proceedings of the 5th Iberoamerican Congress of Digital Graphics / ISBN 956-7813-12-4] Concepcion (Chile) 21-23 november 2001, pp. 315-318
summary	To model a database that stores geo-indexed data or space, a diversity of models exists in the literature. In this article the models will be studied proposed by Michael F. Worboys, Peter Milne and S. A. Roberts and will be represented using OMT (Object Modelling Technique) of Rumbaugh. The models will be evaluated following a methodology based on the existence of a ideal model of reference against the one which to be able to contrast them. The created ideal pattern will be constituted in a new model for the design of space databases OxO.
series	SIGRADI
email
last changed	2016/03/10 09:50

_id	acadia06_540
id	acadia06_540
authors	Diewald, J., Frederick, M.
year	2006
title	Building Information Modeling: Interactive Versioning Experiment
doi	https://doi.org/10.52842/conf.acadia.2006.540
source	Synthetic Landscapes [Proceedings of the 25th Annual Conference of the Association for Computer-Aided Design in Architecture] pp. 540-541
summary	Interactive Versioning, is the first experiment of an ongoing investigation into the conceptual role of parametric modeling in the design process. In this case, the form is defined by constrained floor-plate relationships. Originally testing methods using numerical values exported to excel, we obtained undesirable results and shifted our focus to the creation of an interactive model; restoring the direct influence of user input. The result is a 10-floor structure that allows the user to tweak point locations along the slab perimeters that in turn have global effect on the overall geometry of the architectural body. We are using four point definition types: reference above, interactive reference, reference below, and independent value. Interactive reference points use referential constraints defined as x and y distances from the global origin, which change on account of user inputs. Reference above points pull (x,y) values from an interactive point above. Reference below points pull (x,y) values from interactive points below. Independent points are unaffected by changes in any of the other points but may also be tweaked to adjust a form. On any given level, there are 2 interactive reference points, 2 reference above points, 2 reference below points, and 4 independent points. Additionally, 2 length constraints link interactive points with reference above points on the same level. This allows for changes to affect the entire structure rather than only the floor plates immediately above and below a given change. The addition of constraints to the floor outlines will yield a variety of formal results and offer the possibility to further control the output.
series	ACADIA
email
last changed	2022/06/07 07:55

_id	46bb
authors	Gerzso, J. Michael
year	1998
title	Speculations on a Machine-Understandable Language for Architecture
doi	https://doi.org/10.52842/conf.acadia.1998.302
source	Digital Design Studios: Do Computers Make a Difference? [ACADIA Conference Proceedings / ISBN 1-880250-07-1] Québec City (Canada) October 22-25, 1998, pp. 302-314
summary	One of the objectives of research in computer-aided design in architecture has been to make computer tools or instruments for architectural design, not just drafting. There has been work presented at ACADIA and other conferences related to artificial intelligence, data bases, shape grammars, among others. In all of these cases, existence of a computer language in one form or another is implied. The purpose of this paper is to argue that the progress in the development of intelligent design systems (IDS) is closely linked to the progress of the languages used to implement such systems. In order to make the argument, we will adopt an approach of first specifying the characteristics of an IDS in terms of a conceptual framework of computer languages in a CAD system in general, and what it means to develop a machine-understandable language for architectural CAD in particular. The framework is useful for classifying research projects and for structuring a research agenda in architectural CAD.
series	ACADIA
email
last changed	2022/06/07 07:51

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