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 49

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

_id	ce4a
authors	Hashimshony, Rivka, Shaviv , Edna and Wachman, A.
year	1978
title	A Decomposition Model as a Tool for Evaluation of Multi-Cell Solutions : A Case Study
source	pp. 470-481 : ill. Haifa, Israel: Technion Research and Development Foundation Ltd., March 1978. no. 021-223. includes bibliography
summary	A decomposition-recomposition model that was recently developed by the authors, is applied as a tool for evaluating the layout of an actual design problem composed of 130 activities. The evaluation is performed by comparing the suggested design solution, in terms of space allocation, with a theoretical solution obtained through the model which is set up as a norm for the evaluation
keywords	architecture, evaluation, floor plans, decomposition, space allocation, synthesis
series	CADline
email
last changed	2003/06/02 13:58

_id	cf2011_p051
id	cf2011_p051
authors	Cote, Pierre; Mohamed-Ahmed Ashraf, Tremblay Sebastien
year	2011
title	A Quantitative Method to Compare the Impact of Design Mediums on the Architectural Ideation Process.
source	Computer Aided Architectural Design Futures 2011 [Proceedings of the 14th International Conference on Computer Aided Architectural Design Futures / ISBN 9782874561429] Liege (Belgium) 4-8 July 2011, pp. 539-556.
summary	If we compare the architectural design process to a black box system, we can assume that we now know quite well both inputs and outputs of the system. Indeed, everything about the early project either feasibility studies, programming, context integration, site analysis (urban, rural or natural), as well as the integration of participants in a collaborative process can all be considered to initiate and sustain the architectural design and ideation process. Similarly, outputs from that process are also, and to some extent, well known and identifiable. We are referring here, among others, to the project representations or even to the concrete building construction and its post-evaluation. But what about the black box itself that produces the ideation. This is the question that attempts to answer the research. Currently, very few research works linger to identify how the human brain accomplishes those tasks; how to identify the cognitive functions that are playing this role; to what extent they operate and complement each other, and among other things, whether there possibly a chain of causality between these functions. Therefore, this study proposes to define a model that reflects the activity of the black box based on the cognitive activity of the human brain. From an extensive literature review, two cognitive functions have been identified and are investigated to account for some of the complex cognitive activity that occurs during a design process, namely the mental workload and mental imagery. These two variables are measured quantitatively in the context of real design task. Essentially, the mental load is measured using a Bakan's test and the mental imagery with eyes tracking. The statistical software G-Power was used to identify the necessary subject number to obtain for significant variance and correlation result analysis. Thus, in the context of an exploratory research, to ensure effective sample of 0.25 and a statistical power of 0.80, 32 participants are needed. All these participants are students from 3rd, 4th or 5th grade in architecture. They are also very familiar with the architectural design process and the design mediums used, i.e., analog model, freehand drawing and CAD software, SketchUp. In three experimental sessions, participants were asked to design three different projects, namely, a bus shelter, a recycling station and a public toilet. These projects were selected and defined for their complexity similarity, taking into account the available time of 22 minutes, using all three mediums of design, and this in a randomly manner to avoid the order effect. To analyze the two cognitive functions (mental load and mental imagery), two instruments are used. Mental imagery is measured using eye movement tracking with monitoring and quantitative analysis of scan paths and the resulting number and duration of participant eye fixations (Johansson et al, 2005). The mental workload is measured using the performance of a modality hearing secondary task inspired by Bakan'sworks (Bakan et al.; 1963). Each of these three experimental sessions, lasting 90 minutes, was composed of two phases: 1. After calibrating the glasses for eye movement, the subject had to exercise freely for 3 minutes while wearing the glasses and headphones (Bakan task) to get use to the wearing hardware. Then, after reading the guidelines and criteria for the design project (¬± 5 minutes), he had 22 minutes to execute the design task on a drawing table allowing an upright posture. Once the task is completed, the subject had to take the NASA TLX Test, on the assessment of mental load (¬± 5 minutes) and a written post-experimental questionnaire on his impressions of the experiment (¬± 10 minutes). 2. After a break of 5-10 minutes, the participant answered a psychometric test, which is different for each session. These tests (¬± 20 minutes) are administered in the same order to each participant. Thus, in the first experimental session, the subject had to take the psychometric test from Ekstrom et al. (1978), on spatial performance (Factor-Referenced Cognitive Tests Kit). During the second session, the cognitive style is evaluated using Oltman's test (1971). Finally, in the third and final session, participant creativity is evaluated using Delis-Kaplan test (D-KEFS), Delis et al. (2001). Thus, this study will present the first results of quantitative measures to establish and validate the proposed model. Furthermore, the paper will also discuss the relevance of the proposed approach, considering that currently teaching of ideation in ours schools of architecture in North America is essentially done in a holistic manner through the architectural project.
keywords	design, ideation process, mental workload, mental imagery, quantitative mesure
series	CAAD Futures
email
last changed	2012/02/11 19:21

_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	26ef
authors	Seebohm, Thomas
year	1991
title	A Possible Palladian Villa
source	Reality and Virtual Reality [ACADIA Conference Proceedings / ISBN 1-880250-00-4] Los Angeles (California - USA) October 1991, pp. 135-166
doi	https://doi.org/10.52842/conf.acadia.1991.135
summary	Ever since Wittkower published Architectural Principles in the Age of Humanism in 1949, in which he showed that Palladio's villa plans are based on a tartan grid, it seemed that Palladio's design principles had been encapsulated. When subsequently, in 1978, Mitchell and Stiny enunciated all the topological possibilities for Palladian villa plans, it appeared that the case was closed. Freedman and Hersey have since shown that it is precisely in the application of specific building dimensions and proportions that additional design rules come into play, however. The present study builds on the work of Freedman and Hersey. It uses and extends their method which involves incorporation of the known design principles for Palladian villas, as given implicitly in Palladio's Four Books of Architecture and in his built works, into a computer program capable of generating schematic plans and elevations based on those principles and visually comparing the generated plans and elevations with the known works of Palladio. In cases of disagreement, the reasons for the disagreement help formulate further design rules.
series	ACADIA
email
last changed	2022/06/07 07:56

_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	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	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	a8ca
authors	Courtieux, Gerard
year	1981
title	Man Machine Interface Problems in Computer Aided Architectural Design
source	1981. pp. 231-250 : ill. includes bibliography. -- discussion (pp. 247-250)
summary	The author and two other researchers conducted a world-wide survey of existing computer aided architectural design programs in 1978. The purpose of the survey was to validate an earlier study of the architectural design process and to investigate problem areas in Computer Aided Architectural Design (CAAD). The survey indicated that two problems of man machine interaction in CAAD, though partly solved, remain a challenge for computer scientists: the description and graphical representation of three-dimensional objects. The formalization of the information collected in the survey, together with the experience of the author in teaching computer graphics to architecture students for the past ten years, is used to give some insight in these two problems and to make some recommendations for the improvement of the man machine interface in CAAD
keywords	architecture, CAD, user interface
series	CADline
last changed	1999/02/12 15:07

_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	2612
authors	Flemming, Ulrich
year	1978
title	Wall Representations of Rectangular Dissections and Their Use in Automated Space Allocation
source	Environment and Planning B. 1978. vol. 5: pp. 215-232 : ill. includes bibliography
summary	A procedure is described which generates dissections of rectangles into rectangular components in order to obtain solutions to space-allocation problems which are restricted through topological and dimensional constraints. Solutions are generated in two steps: step 1 determines basic geometric properties of the arrangements to be produced, and step 2 computes the dimensions of the spaces in such an arrangement. Both steps are based on `wall representations' of the solutions. These representations allow geometric relations and operations to be transformed into relations and operations defined on character strings. They furthermore allow the (possibly infinite) set of solutions to be systematically searched for a finite set of `principal options'. The importance linear-programming techniques for step 2 is described
keywords	space allocation, linear programming, representation, CAD, design,automation, layout, synthesis
series	CADline
email
last changed	2003/02/26 17:24

_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	0354
authors	Goodman, Gary and Reddy, Raj D.
year	1978
title	Alternative Control Structures for Speech Understanding Systems
source	1978 ? [13] p. : ill. includes bibliography Control structures are an essential part of any speech recognition system. They are the devices by which passive knowledge about the task and language is transformed into active and effective processes. In the chapter, three areas of control structures are defined and discussed: knowledge source interaction, knowledge source activation, and knowledge source focusing. Discussion relates the concepts presented to systems developed during the five-year ARPA speech understanding project. speech recognition / systems / control / structures / AI. 64. Goodman, Tim and Keith Unsworth. 'Manipulating Shape and Producing Geometric Continuity in B-spline Curves.' IEEE Computer Graphics and Applications. February, 1986. vol. 6: pp. 50-56 : ill. includes bibliography.
summary	This article examines some of the desirable features of B- splines that make them particularly suitable for computer- aided design. First, a theoretical analysis is presented regarding the effects upon the shape of a design curve when the bias and tension parameters are allowed to vary in certain ways. Second, the concept of geometric continuity is discussed, and conditions are derived upon the control vertices to ensure that the design curve has second-order geometric continuity. Illustrations of B-spline curves are presented to support the theoretical conclusions
keywords	computational geometry, B-splines, curves, CAD
series	CADline
last changed	2003/06/02 13:58

_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	60da
authors	Grogono, Peter
year	1978
title	Programming in PASCAL
source	vii, 359 p. : diagrams Reading, Mass.: Addison-Wesley Co. Inc., 1978. includes bibliography: p. 309-317 and index
summary	An introduction, includes general principles of computer programming, data management and structure in PASCAL
keywords	education, PASCAL, programming
series	CADline
last changed	1999/02/12 15:08

_id	47dd
authors	Kernighan, Brian W.
year	1978
title	UNIX For Beginners --- 2nd. ed
source	September, 1978. 14 p. includes bibliography
summary	This paper is meant to help new users get started on the UNIX operating system. It includes: basics needed for day-to-day use of the system - typing commands, correcting typing mistakes, logging in and out, mail, inter-terminal communication, the file system, printing files, redirection I/O, pipes, and the shell. Document preparation - a brief discussion of the major formatting programs and macro packages - hints on preparing documents, and capsule descriptions of some supporting software. UNIX programming discusses using the editor, programming the shell, programming in C, and other languages and tools. An annotated UNIX bibliography is included
keywords	UNIX, programming, education
series	CADline
last changed	2003/06/02 13:58

_id	caadria2003_c6-2
id	caadria2003_c6-2
authors	Li Suping, Joo-Hwa Bay
year	2003
title	A Cognitive Framework of Collaborative Design Between Architects and Manufacturer-Designers
source	CAADRIA 2003 [Proceedings of the 8th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 974-9584-13-9] Bangkok Thailand 18-20 October 2003, pp. 855-870
doi	https://doi.org/10.52842/conf.caadria.2003.855
summary	The widespread application of prefabricated products in building has made prefabrication an indispensable part of building processes. In this context, instead of handling every detail by architects themselves, some parts of architectural design have been transferred to manufacturer-designers. This inevitably brings about problems in the integration of prefabricated products and the specific buildings they serve. As a result, collaboration between architects and manufacturer-designers takes place in building processes in various forms and extents (non-, semi-, and full-collaboration). In this study, we aim to investigate collaborative design process from the cognitive aspect of design generation between architects and manufacturer-designers in terms of project-related products design. By applying the Kernel of Conceptual System theory (Tzonis et al., 1978), we intend to set up two empirical models in terms of design differences' formation in collaborative design process based on a case study with seeking the answers for the following research questions: 1. What kinds of design differences are raised in design processes? 2. Why the design differences are raised in design processes? 3. What implications could be made in developing computational models to facilitate collaborative design between architects and manufacturer-designers?
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	10a8
authors	McCall, Raymond Joseph
year	1978
title	On the structure and use of issue systems in design
source	University of California, Berkeley
summary	The purpose of this dissertation is to explain and justify the concept of issue serving-systems as a new paradigm for descriptive and normative models of design processes. This paradigm is based in general on Horst Rittel's "Argumentative Planning Paradigm" and in particular on Rittel's "Issue-Based Information System" --IBIS-- method. Like IBIS, the issue serving-system concept views design as consisting of the raising and answering of various questions, called issues. The addition of the issue serving-system concept to IBIS is the claim that the serving relationship is the main means for structuring issues into a system for design. That relationship is the one in which an issue A serves an issue B, by which it is meant that the answering of A is useful in deriving the answer to B. Collections of issues structured by this relationship are labelled "issue serving-systems." In the dissertation it is explained that an issue servingsystem has a quasi-hierarchical structure and has as its function the answering of a P!L issue, i.e., an issue of the form, "What should this plan be." Two projects are undertaken in order to demonstrate the normative significance of the issue serving-system concept. The first is to show that the concept forms the basis of a variety of techniques for mechanical (algorithmic) generation of issues and answers. The second is to show how the concept provides criteria for determining which issues should be dealt with and in what order. In particular, it is argued that a topdown breadth-first order of raising issues is best. These conclusions are incorporated into procedures for design, and two applications of these procedures are described. One application involves use of an interactive computer program written by the author. The other involves a non-computerized version of the method.
series	thesis:PhD
last changed	2003/02/12 22:37

_id	98bd
authors	Pea, R.
year	1993
title	Practices of Distributed Intelligence and Designs for Education
source	Distributed Cognitions, edited by G. Salomon. New York, NY: CambridgeUniversity Press
summary	v Knowledge is commonly socially constructed, through collaborative efforts... v Intelligence may also be distributed for use in designed artifacts as diverse as physical tools, representations such as diagrams, and computer-user interfaces to complex tasks. v Leont'ev 1978 for activity theory that argues forcibly for the centrality of people-in-action, activity systems, as units of analysis for deepening our understanding of thinking. v Intelligence is distributed: the resources that shape and enable activity are distributed across people, environments, and situations. v Intelligence is accomplished rather than possessed. v Affordance refers to the perceived and actual properties of a thing, primarily those functional properties that determine how the thing could possibly be used. v Norman 1988 on design and psychology - the psychology of everyday things" v We deploy effort-saving strategies in recognition of their cognitive economy and diminished opportunity for error. v The affordances of artifacts may be more or less difficult to convey to novice users of these artifacts in the activities to which they contribute distributed intelligence. v Starts with Norman's seven stages of action Ø Forming a goal; an intention § Task desire - clear goal and intention - an action and a means § Mapping desire - unable to map goal back to action § Circumstantial desire - no specific goal or intention - opportunistic approach to potential new goal § Habitual desire - familiar course of action - rapidly cycle all seven stages of action v Differentiates inscriptional systems from representational or symbol systems because inscriptional systems are completely external, while representational or symbol systems have been used in cognitive science as mental constructs. v The situated properties of everyday cognition are highly inventive in exploiting features of the physical and social situation as resources for performing a task, thereby avoiding the need for mental symbol manipulations unless they are required by that task. v Explicit recognition of the intelligence represented and representable in design, specifically in designed artifacts that play important roles in human activities. v Once intelligence is designed into the affordances properties of artifacts, it both guides and constrains the likely contributions of that artifact to distributed intelligence in activity. v Culturally valued designs for distributed intelligence will change over time, especially as new technology becomes associated with a task domain. v If we treat distributed intelligence in action as the scientific unit of analysis for research and theory on learning and reasoning... Ø What is distributed? Ø What constraints govern the dynamics of such distributions in different time scales? Ø Through what reconfigurations of distributed intelligence might the performance of an activity system improve over time? v Intelligence is manifest in activity and distributed in nature. v Intelligent activities ...in the real world... are often collaborative, depend on resources beyond an individual's long-term memory, and require the use of information-handling tools... v Wartofsky 1979 - the artifact is to cultural evolution what the gene is to biological evolution - the vehicle of information across generations. v Systems of activity - involving persons, environment, tools - become the locus of developmental investigation. v Disagrees with Salomon et al.'s entity-oriented approach - a language of containers holding things. v Human cognition aspires to efficiency in distributing intelligence - across individuals, environment, external symbolic representations, tools, and artifacts - as a means of coping with the complexity of activities we often cal "mental." "
series	other
last changed	2003/04/23 15:14

For more results click below: