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	8f1d
authors	Herot, C.
year	1976
title	Graphical Input Through Machine Recognition of Sketches
source	Computer Graphics, SIGGRAPH Quarterly Report, Vol. 10, No. 2
summary	A family of programs has been developed to allow graphical input through continuous digitizing. Drawing data, sampled at a high and constant rate, is compressed and mapped into lines and splines, in two and three dimensions. This is achieved by inferring a particular user's intentions from measures of speed and pressure.Recent experiments have shown that even the most basic inference making cannot rely solely upon knowledge of the user's drawing style, but needs additional knowledge of the subject being drawn, the protocols of its domain, and the stage of development of the user's design. This requirement implies a higher level of machine intelligence than currently exists. An alternate approach is to increase the user's involvement in the recognition process.Contrary to previous efforts to move from sketch to mechanical drawing without human intervention, this paper reports on an interactive system for graphical input in which the user overtly partakes in training the machine and massaging the data at all levels of interpretation. The initial routines for data compression employ parallel functions for extracting such features as bentness, straightness, and endness. These are planned for implementation in microprocessors.Results offer a system for rapid (and enjoyable) graphical input with real-time interpretation, the beginnings of an intelligent tablet.
series	report
last changed	2003/04/23 15:50

_id	407caadria2004
id	407caadria2004
authors	Larry Sass
year	2004
title	Rapid Prototyping Techniques for Building Program Study
source	CAADRIA 2004 [Proceedings of the 9th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 89-7141-648-3] Seoul Korea 28-30 April 2004, pp. 655-670
doi	https://doi.org/10.52842/conf.caadria.2004.655
summary	This paper is original research that demonstrates new design possibilities for evaluation in the schematic phase of design through the use rapid prototyping as a tool of representation verses 2D drawing. These program shapes are created from CAD files using a threedimensional printing and laser cutting CAM tools. This way of working is in response to two dimensional plan representation and evaluation (Mitchell 1976). This research combines the best of the visual aspects of plan representation and the formal representation of solid block modeling. The models in this paper demonstrate the building’s physical scale of spaces, building use and overall form. Resulting models will demonstrate a new way of designing in CAD one that combined physical and visual ways or representation.
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	888b
authors	Levin, Joshua
year	1976
title	A Parametric Algorithm for Drawing Pictures of Solid Objects Composed of Quadric Surfaces
source	Communications of the ACM. October, 1976. vol. 19: pp. 555- 563. includes bibliography
summary	An algorithm for drawing pictures of three-dimensional objects, with surfaces made up of patches of quadric surfaces, is described. The emphasis of this algorithm is on calculating the intersections of quadric surfaces. A parametrization scheme is used. Each quadric surface intersection curve (QSIC) is represented as a set of coefficients and parameter limits. Each value of the parameter represents at most two points, and these may easily be distinguished. This scheme can find the coordinates of points of even quartic (fourth-order) intersection curves, using equations of no more than second order. Methods of parametrization for each type of QSIC are discussed, as well as surface bounding and hidden surface removal
keywords	algorithms, curves, curved surfaces, intersection, hidden surfaces, parametrization, computational geometry
series	CADline
last changed	1999/02/12 15:09

_id	c7e0
id	c7e0
authors	Maria Gabriela Caffarena Celani
year	2002
title	BEYOND ANALYSIS AND REPRESENTATION IN CAD: A NEW COMPUTATIONAL APPROACH TO DESIGN EDUCATION
source	Submitted to the Department of Architecture in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the field of Architecture: Design & Computation at the Massachusetts Institute of Technology
summary	This thesis aims at changing students' attitude towards the use of computer-aided design (CAD) in architecture. It starts from the premise that CAD is used mostly for analysis and representation, and not as a real design aide, and that architecture students have a bias against learning computer programming. For this purpose, a prototypical instruction system that mixes computer-aided design and computational design theory was developed, based on a series of fundamental concepts that are common to both fields. This system was influenced by Mitchell's (1987) The Art of Computer Graphics Programming and Stiny's (1976) shape grammars. Despite being based on solid theoretical foundations, CAD has progressively become an exclusively practical tool, since its origins in the 50's and 60's, while computational design theories have been mostly restricted to the academic circles. This thesis proposes an inversion in the present situation: the study of CAD theory, and the application of computational design into practice. The system proposed provides a conceptual framework that can be adapted to different circumstances, including course formats and resources, as well as students' background and technical training. It is based on seven fundamental concepts from computational design theories that are also important to the study of shape grammars: symmetry, recursion, rule-based compositions, parameterization of shapes, generative systems, algorithmization of design procedures, and shape emergence. These concepts are introduced within a CAD context, where their practical implementation and experimentation are possible, focusing the understanding of the computational nature of design. During this research, the proposed system was tested in two case studies with students from schools that had contrary orientations in terms of the importance of CAD in the architectural curriculum. In these experimental courses, students' activities evolved from using a commercial CAD tool in an innovative way, to the use of programming techniques for creating meaningful tools. Despite not having a statistical reach, the fieldwork allowed drawing preliminary conclusions about the proposed system's efficacy, since virtually all the students reported changing their understanding of the role of CAD in architecture, while some also acknowledged a conceptual influence in other subjects and in the way they see architecture.
keywords	Symmetry
series	thesis:PhD
type	normal paper
email
more	http://www.fec.unicamp.br/~celani/
last changed	2004/11/17 20:51

_id	2866
authors	Clark, James H.
year	1976
title	Hierarchical Geometric Model for Visible Surface Algorithms
source	communications of the ACM. October, 1976. vol. 19: pp. 547-554 : ill. includes bibliography
summary	The geometric structure inherent in the definition of the shapes of three-dimensional objects and environments is used not just to define their relative motion and placement, but also to assist in solving many other problems of systems for producing pictures by computers. By using an extension of traditional structure information, or a geometric hierarchy, five significant improvements to current techniques are possible. First, the range of complexity of an environment is greatly increased while the visible complexity of any given scene is kept within a fixed upper limit. Second, a meaningful way is provided to vary the amount of detail presented in a scene. Third, 'clipping' becomes a very fast logarithmic search for the resolvable parts of the environment within the field of view. Fourth, frame to frame coherence and clipping define a graphical 'working set,' or fraction of the total structure that should be present in primary store for immediate access by the visible surface algorithm. Finally, the geometric structure suggests a recursive descent, visible surface algorithm in which the computation time potentially grows linearly with the visible complexity of the scene
keywords	hidden lines, hidden surfaces, data structures, clipping, geometric modeling, algorithms, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	b0e7
authors	Ahmad Rafi, M.E. and Karboulonis, P.
year	2000
title	The Re-Convergence of Art and Science: A Vehicle for Creativity
source	CAADRIA 2000 [Proceedings of the Fifth Conference on Computer Aided Architectural Design Research in Asia / ISBN 981-04-2491-4] Singapore 18-19 May 2000, pp. 491-500
doi	https://doi.org/10.52842/conf.caadria.2000.491
summary	Ever-increasing complexity in product design and the need to deliver a cost-effective solution that benefits from a dynamic approach requires the employment and adoption of innovative design methods which ensure that products are of the highest quality and meet or exceed customers' expectations. According to Bronowski (1976) science and art were originally two faces of the same human creativity. However, as civilisation advances and works became specialised, the dichotomy of science and art gradually became apparent. Hence scientists and artists were born, and began to develop work that was polar opposite. The sense of beauty itself became separated from science and was confined within the field of art. This dichotomy existed through mankind's efforts in advancing civilisation to its present state. This paper briefly examines the relationship between art and science through the ages and discusses their relatively recent re-convergence. Based on this hypothesis, this paper studies the current state of the convergence between arts and sciences and examines the current relationship between the two by considering real world applications and products. The study of such products and their successes and impact they had in the marketplace due to their designs and aesthetics rather than their advanced technology that had partially failed them appears to support this argument. This text further argues that a re-convergence between art and science is currently occurring and highlights the need for accelerating this process. It is suggested that re-convergence is a result of new technologies which are adopted by practitioners that include effective visualisation and communication of ideas and concepts. Such elements are widely found today in multimedia and Virtual Environments (VEs) where such tools offer increased power and new abilities to both scientists and designers as both venture in each other's domains. This paper highlights the need for the employment of emerging computer based real-time interactive technologies that are expected to enhance the design process through real-time prototyping and visualisation, better decision-making, higher quality communication and collaboration, lessor error and reduced design cycles. Effective employment and adoption of innovative design methods that ensure products are delivered on time, and within budget, are of the highest quality and meet customer expectations are becoming of ever increasing importance. Such tools and concepts are outlined and their roles in the industries they currently serve are identified. Case studies from differing fields are also studied. It is also suggested that Virtual Reality interfaces should be used and given access to Computer Aided Design (CAD) model information and data so that users may interrogate virtual models for additional information and functionality. Adoption and appliance of such integrated technologies over the Internet and their relevance to electronic commerce is also discussed. Finally, emerging software and hardware technologies are outlined and case studies from the architecture, electronic games, and retail industries among others are discussed, the benefits are subsequently put forward to support the argument. The requirements for adopting such technologies in financial, skills required and process management terms are also considered and outlined.
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	aa83
authors	Aho, Alfred V., Hopcroft , John E. and Ullman, Jeffrey D.
year	1976
title	The Design and Analysis of Computer Algorithms
source	x, 470 p. : ill Reading, Massachusetts: Addison-Weslely Pub. Co., 1976. includes bibliography: p. [452]-462 and index.
summary	A text book for a first course in design and analysis of algorithms. The emphasis is on ideas and ease of understanding rather then on implementation details or programming tricks. It starts with formulating several models that include random access register machine, random access stored program machine and variants of these, so one can establish analytical results and at the same time accurately reflect on the salient features of real machines
keywords	algorithms, programming
series	CADline
last changed	2003/06/02 13:58

_id	186e
authors	Blinn, J.F. and Newell, M.E.
year	1976
title	Texture and Reflection in Computer Generated Images
source	Communications of the ACM 19 10 542-547
summary	In 1974 Catmull developed a new algorithm for rendering images of bivariate surface patches. This paper describes extensions of this algorithm in the areas of texture simulation and lighting models. The parametrization of a patch defines a coordinate system which is used as a key for mapping patterns onto the surface. The intensity of the pattern at each picture element is computed as a weighted average of regions of the pattern definition function. The shape and size of this weighting function are chosen using digital signal processing theory. The patch rendering algorithm allows accurate computation of the surface normal to the patch at each picture element, permitting the simulation of mirror reflections. The amount of light coming from a given direction is modeled in a similar manner to the texture mapping and then added to the intensity obtained from the texture mapping. Several examples of images synthesized using these new techniques are included.
series	journal paper
last changed	2003/11/21 15:16

_id	62c4
authors	Blinn, James F. and Newell, Martin E.
year	1976
title	Texture and Reflection in Computer Generated Images
source	communications of the ACM October, 1976. vol. 19: pp. 542-547 : ill. (col.). includes bibliography.
summary	In 1974 Catmull developed a new algorithm for rendering images of bivariate surface patches. This paper describes extensions of this algorithm in the areas of texture simulation and lighting models. The parametrization of a patch defines a coordinate system which is used as a key for mapping patterns onto the surface. The intensity of the pattern at each picture element is computed as a weighted average of regions of the pattern definition function. The shape and size of this weighting function are chosen using digital signal processing theory. The patch rendering algorithm allows accurate computation of the surface normal to the patch at each picture element, permitting the simulation of mirror reflections. The amount of light coming from a given direction is modeled in a similar manner to the texture mapping and then added to the intensity obtained from the texture mapping. Several examples of images synthesized using these new techniques are included
keywords	algorithms, computer graphics, shading, hidden surfaces, texture mapping, curved surfaces, rendering
series	CADline
last changed	2003/06/02 13:58

_id	cf2009_poster_27
id	cf2009_poster_27
authors	Do, Ellen Yi-Luen
year	2009
title	Towards A Smart Living Environment: Happy Healthy Living With Ambient Intelligence and Technology
source	T. Tidafi and T. Dorta (eds) Joining Languages Cultures and Visions: CAADFutures 2009 CD-Rom
summary	Achieving wellness is a Grand Challenge. We are concerned about the quality of life for ourselves and for our society. As human beings we want to develop and cultivate our untapped potential for a happy, healthy, creative and fulfilling life. Technological innovation may be just the key to unlock human potential for the Holy Grail of wellness. Wellness has multiple dimensions: physical, emotional, occupational, social, intellectual and spiritual (Hettler 1976). Below we briefly describe interesting design computing projects employing technological innovations to contribute toward a smart living environment for wellness.
keywords	Ambient, intelligence, ubiquitous computing, smart living
series	CAAD Futures
type	poster
email
last changed	2009/07/08 22:11

_id	4d59
authors	Greer, Kenneth
year	1976
title	SPACS : Graphics Editor
source	July, 1976. 22 p. : ill. includes index
summary	SPACS is an interactive graphics editor for use with a stylus/tablet input device in conjunction with a graphics display terminal. SPACS is well suited for making tables, flow charts, logic diagrams, and other similar schematic diagrams. The user may ultimately obtain a hard copy of her work via the Xerox Graphic Processor (XGP). SPACS is composed of a large PDP-11 program, where the picture processing is performed, and a SAIL program on the PDP-10, which acts as an I/O link for saving and retrieving files. In addition there is another SAIL program for creating image files for the XGP
keywords	computer graphics, programming, software
series	CADline
last changed	1999/02/12 15:08

_id	01ed
authors	Haberman, N. and DeWayne, M.C.
year	1976
title	ADA for Experienced Programmers
source	Reading, MA: Addison-Wesley
summary	A unique presentation of Ada, the powerful programming language sponsored and championed by the Department of Defense, and mandated to be used for developing all mission-critical software to used by the U.S. Armed Forces. This text is offered to experienced programmers, who most often lack the resources to learn a new language: either the existing texts are too simple, designed for beginners, or the texts are of reference quality, designed to be of use to users with extensive experience "behind the wheel," so to speak. Contains sample situations and study questions to help learners absorb Ada concepts.
series	other
last changed	2003/04/23 15:14

_id	266a
authors	Klinger, Allen and Dyer, Charles R.
year	1976
title	Experiments on Picture Representation Using Regular Decomposition
source	Computer Graphics and Image Processing. 1976. vol. 5: pp. 68-105 : ill. includes bibliography
summary	The problem of building a computer-searchable data representation for a complex image and the effect of representation on algorithms for scene segmentation into regions is considered. A regular decomposition of picture area into successively smaller quadrants is defined, which involves logarithmic search. This hierarchical search and resulting picture representation are shown to enable rapid access of image data without regard to position, efficient storage, and approximate structural descriptions of constituent patterns. Examples involving solid geometrical objects and alphabetic characters are given
keywords	algorithms, image processing, search, decomposition
series	CADline
last changed	2003/06/02 13:58

_id	fb37
authors	Knight, T.
year	1999
title	Applications in architectural design and education and practice
source	Report for the NSF/MIT Workshop on Shape Computation, Cambridge, Mass., 25-26 April 1999
summary	Shortly after shape grammars were invented by Stiny and Gips, a two part project for shape grammars was outlined by Stiny. In a 1976 paper,1 Stiny described "two exercises in formal composition". These simple exercises became the foundation for the many applications of shape grammars that followed, and suggested the potential of such applications in education and practice. The first exercise showed how shape grammars could be used in original composition, that is, the creation of new design languages or styles from scratch. The second exercise showed how shape grammars could be used to analyze known or existing design languages. Both exercises illustrated the unique characteristics of the shape grammar formalism that helped motivate a quarter century (almost!) of shape grammar work. General but simple, formal yet intuitive: qualities that continue to make shape grammar disciples and confound skeptics. The history of shape grammar applications in architecture and the arts for the two complementary purposes of synthesis and analysis, as well as for a third, joint purpose is sketched in the first section of this report. These three categories of applications do not have rigid boundaries. They are used in this report mostly as a framework for discussion. An overview of the roles of shape grammar applications in education and practice is given in the second section. New and ongoing issues concerning shape grammars in education and practice are discussed in the last section.
series	report
last changed	2003/04/23 15:50

_id	4f07
authors	Leach, Edmund
year	1976
title	Culture and Communication. The logic by which symbols are connected
source	Cambridge University Press. London
summary	The recent spread of 'structuralist' writing has been hailed as the dawn of a new age and condemned as an intellectual disaster but, like all fashionable diseases, it is more talked about than understood. Edmund Leach's new book is designed for the use if teaching undergraduates in anthropology, linguistics, literary studies, philosophy and related disciplines faced for the first time with structuralist argument; it provides the prolegomena necessary to understand the final chapter of Levi-Strauss's massive four-volume Mythologiques. The objective is complex, the manner simple. Some prior knowledge of anthropological literature is useful but not essential; the principal ethnographic source is the Book of Leviticus; this guide should help anyone who is trying to grasp the essentials of 'seminology' - the general theory of how signs and symbols come to convey meaning.Although, in essence, a textbook, substantial portions of the argument are here presented for the first time; thus Section 16 contains an innovating contribution to general incest theory, and the analysis of the logic of animal sacrifice presented in Section 18 is an advance on anything previous published on this theme. The author's core thesis is that: 'the indices in non-verbal communication systems, like the sound elements in spoken language, do not have meaning as isolates, but only as members of set'; the book's special merit is that it makes this kind of jargon comprehensible in terms of our everyday experience.
series	other
last changed	2003/04/23 15:14

_id	e9e6
authors	Lowerre, Bruce and Reddy, Raj D.
year	1976
title	The Harpy Speech Understanding
source	1976. pp. 1-19
summary	Harpy is one of the first systems to demonstrate that high performance, large vocabulary connected speech recognition systems can in fact be realized economically for task- oriented (restricted) languages. In this chapter the authors present, using simple examples, the principles of organization of the Harpy system. They illustrate how knowledge sources (KSs) are specified, how the knowledge compiler integrates the KSs into a unified directional graph representation, and how this knowledge is utilized. In conclusion, they discuss many of the limitations of the present system and how these can be eliminated or reduced in future systems
keywords	speech recognition, AI
series	CADline
last changed	2003/06/02 10:24

_id	acadia03_046
id	acadia03_046
authors	Maze, J., McGlothlin, M. and Tanzer, K.
year	2003
title	Fluid (in)form:Influencing Design Through Dynamic Particle Simulation
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 357-363
doi	https://doi.org/10.52842/conf.acadia.2003.357
summary	“My earliest childhood memories are related to a ranch my family owned near the village of Mazamitla. It was a pueblo with hills, formed by houses with tile roofs and immense eaves to shield passersby from the heavy rains which fall in that area. Even the earth’s color was interesting because it was red earth. In this village, the water distribution system consisted of great gutted logs, in the form of troughs, which ran on a support structure of tree forks, five meters high, above the roofs. The aqueduct crossed over the town, reaching the patios, where there were great stone fountains to receive the water. The patios outside the stables, with cows and chickens, all together. Outside, in the street, there were iron rings to tie the horses. The channeled logs, covered with moss, dripped water all over town, of course. It gave this village the ambience of a fairy tale.”(Luis Barragan,qtd in Ambasz 1976)
series	ACADIA
email
last changed	2022/06/07 07:58

_id	c1a7
authors	Nerlich, Graham
year	1976
title	The Shape of Space
source	London: Cambridge University Press
summary	This is a revised and updated edition of Graham Nerlich's classic book The Shape of Space. It develops a metaphysical account of space which treats it as a real and concrete entity. In particular, it shows that the shape of space plays a key explanatory role in space and spacetime theories. Arguing that geometrical explanation is very like causal explanation, Professor Nerlich prepares the ground for philosophical argument, and, using a number of novel examples, investigates how different spaces would affect perception differently. This leads naturally to conventionalism as a non-realist metaphysics of space, an account which Professor Nerlich criticises, rejecting its Kantian and positivistic roots along with Reichenbach's famous claim that even the topology of space is conventional. He concludes that there is, in fact, no problem of underdetermination for this aspect of spacetime theories, and offers an extensive discussion of the relativity of motion.
series	other
last changed	2003/04/23 15:14

_id	caadria2009_026
id	caadria2009_026
authors	Ostwald, Michael J.; Josephine Vaughan
year	2009
title	Calculating Visual Complexity In Peter Eisenman’s Architecture
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 75-84
doi	https://doi.org/10.52842/conf.caadria.2009.075
summary	This paper describes the results of the first computational investigation of characteristic visual complexity in the architecture of Peter Eisenman. The research uses a variation of the “box-counting” approach to determining a quantitative value of the formal complexity present in five of Eisenman’s early domestic works (Houses I, II, III, IV and VI all of which were completed between 1968 and 1976). The boxcounting approach produces an approximate fractal dimension calculation for the visual complexity of an architectural elevation. This method has previously been used to analyse a range of historic and modern buildings including the works of Frank Lloyd Wright, Eileen Gray, Le Corbusier and Kazuyo Sejima. Peter Eisenman’s early house designs–important precursors to his later Deconstructivist works–are widely regarded as possessing a high degree of formal consistency and a reasonably high level of visual complexity. Through this analysis it is possible to quantify both the visual complexity and the degree of consistency present in this work for the first time.
keywords	Computational analysis; fractal dimension; box-counting; Peter Eisenman
series	CAADRIA
email
last changed	2022/06/07 08:00

_id	ac91
authors	Reddy, Raj D.
year	1976
title	Speech Recognition by Machine : A Review
source	April 1976. pp. 501-529 : tables and diagrams. includes bibliography
summary	This paper provides a review of recent developments in speech recognition research. The concept of sources of knowledge is introduced and the use of knowledge to generate and verify hypotheses is discussed. The difficulties that arise in the construction of different types of speech recognition systems are discussed and the structure and performance of several such systems is presented. Aspects of component subsystems at the acoustic, phonetic, syntactic, and semantic levels are presented. System organizations that are required for effective interaction and use of various component subsystems in the presence of error and ambiguity are discussed
keywords	AI, speech recognition
series	CADline
last changed	2003/06/02 10:24

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