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	8d59
authors	Andersen, J.M.
year	1983
title	CAD in Architectural Practice
source	Mechanical Engineering. July, 1983. pp. 48-54 : ill. includes a short bibliography
summary	A leading architecture/engineering firm has made use of in- house computer system since 1963. This paper discusses some special topics in using computers for the design of HVAC systems, and the process of implementing CAD in the HVAC engineering practice
keywords	computer graphics, HVAC, applications, practice, architecture
series	CADline
last changed	2003/06/02 13:58

_id	41af
authors	Barnhill, Robert E.
year	1983
title	A Survey of the Representation and Design of Surfaces
source	IEEE Computer Graphics and Applications. October, 1983. vol. 3: pp. 9-16 : ill. includes bibliography
summary	The approach of devising robust surface methods applicable to arbitrarily located data was taken by the CAGD Group at the University of Utah. Adopting two broad classes of methods suitable for solving the problems (i.e., problems for which simplifying geometric assumptions cannot be made): (1) surface interpolants defined over triangles or tetrahedra and (2) distance-weighted interpolants. Interactive computer graphics was used to display surfaces for adequate visualization. Although some figures were given, it must be kept in mind that some 3-D medium, or at least motion, is necessary to understand surfaces
keywords	computational geometry, computer graphics, representation, curved surfaces, mathematics
series	CADline
last changed	2003/06/02 10:24

_id	4491
authors	Bouyat, M., H. Botta and Vignat, J. C.
year	1983
title	VERDI : A Computer Aided Design System for Development and City Planning
source	ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 382-385 : ill. includes bibliography
summary	The system presented is a CAD system for use in planning road and other facility networks. Taking a draft master plan as its point of departure the system makes it possible: (1) To plan in a dynamic fashion since it permits the back-and-forth study of the interconnections between the design of the master plan and network design; (2) to preserve, from one work session to another, data that has already been acquired and calculated; (3) to make relevant technical evaluations in the following three fields: earthworks, roads, and sewage networks
keywords	CAD, urban planning, applications
series	CADline
last changed	2003/06/02 13:58

_id	6647
authors	Buxton, W., M.R. Lamb and Sherman, D. (et al)
year	1983
title	Towards a Comprehensive User Interface Management System
source	computer Graphics. July, 1983. vol. 17: pp. 35-42 : ill. includes bibliography
summary	A UIMS developed at the University of Toronto is presented. The system has two main components. The first is a set of tools to support the design and implementation of interactive graphics programs. The second is a run-time support package which handles interactions between the system and the user (things such as hit detection, event detection, screen updates, and procedure invocation), and provides facilities for logging user interactions for later protocol analysis. The design / implementation tool is a preprocessor, called MENULAY, which permits the applications programmer to use interactive graphics techniques to design graphics menus and their functionality. The output of this preprocessor is high- level code which can be compiled with application-specific routines. User interactions with the resulting executable module are then handled by the run-time support package. The presentation works through an example from design to execution in a step-by-step manner
keywords	software, user interface, management, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	60c5
authors	Gordon, William J.
year	1983
title	An Operator Calculus for Surface and Volume Modeling
source	IEEE Computer Graphics and Applications October, 1983. vol. 3: pp. 18-22 : ill. includes bibliography.
summary	This article briefly describes the mathematical techniques underlying surface and volume modeling techniques in current practice. The first part outlines what might be termed an operator calculus for the approximation and interpolation of functions of more than one independent variable. This operator calculus uses operator multiplication and Boolean addition to compound the linear operators associated with simple bivariate and multivariate interpolation/approximation schemes. The result is a distributive lattice of approximation operators. The other two sections of the article contain specific examples of how this operator calculus leads to practical techniques for sculptured surface and volume modeling
keywords	curved surfaces, representation, solid modeling, boolean operations
series	CADline
last changed	2003/06/02 13:58

_id	sigradi2007_af13
id	sigradi2007_af13
authors	Granero, Adriana Edith; Alicia Barrón; María Teresa Urruti
year	2007
title	Transformations in the educational system, Influence of the Digital Graph [Transformaciones en el sistema educacional, influencia de la Gráfica Digital]
source	SIGraDi 2007 - [Proceedings of the 11th Iberoamerican Congress of Digital Graphics] México D.F. - México 23-25 October 2007, pp. 182-186
summary	The educative proposal was based on the summary attained through experiences piled up during the 2 last semester courses, 2/2006-1/2007. This proposal corresponds to a mix of methodology (by personal attendance / by internet). Founding on the Theory of the Game (Eric Berne 1960) and on different theories such as: Multiple intelligences (Haward Gardner 1983), Emotional Intelligence (Peter Salowey and John Mayer 1990, Goleman 1998), Social Intelligence (Goleman 2006), the Triarchy of Intelligence (Stemberg, R.J. 1985, 1997), “the hand of the human power”, it´s established that the power of the voice, that of the imagination, the reward, the commitment and association produce a significant increase of the productivity (Rosabeth Moss Kanter 2000), aside from the constructive processes of the knowledge (new pedagogical concepts constructivista of Ormrod J.E. 2003 and Tim O´Reilly 2004).
series	SIGRADI
email
last changed	2016/03/10 09:52

_id	sigradi2006_e028c
id	sigradi2006_e028c
authors	Griffith, Kenfield; Sass, Larry and Michaud, Dennis
year	2006
title	A strategy for complex-curved building design:Design structure with Bi-lateral contouring as integrally connected ribs
source	SIGraDi 2006 - [Proceedings of the 10th Iberoamerican Congress of Digital Graphics] Santiago de Chile - Chile 21-23 November 2006, pp. 465-469
summary	Shapes in designs created by architects such as Gehry Partners (Shelden, 2002), Foster and Partners, and Kohn Peterson and Fox rely on computational processes for rationalizing complex geometry for building construction. Rationalization is the reduction of a complete geometric shape into discrete components. Unfortunately, for many architects the rationalization is limited reducing solid models to surfaces or data on spread sheets for contractors to follow. Rationalized models produced by the firms listed above do not offer strategies for construction or digital fabrication. For the physical production of CAD description an alternative to the rationalized description is needed. This paper examines the coupling of digital rationalization and digital fabrication with physical mockups (Rich, 1989). Our aim is to explore complex relationships found in early and mid stage design phases when digital fabrication is used to produce design outcomes. Results of our investigation will aid architects and engineers in addressing the complications found in the translation of design models embedded with precision to constructible geometries. We present an algorithmically based approach to design rationalization that supports physical production as well as surface production of desktop models. Our approach is an alternative to conventional rapid prototyping that builds objects by assembly of laterally sliced contours from a solid model. We explored an improved product description for rapid manufacture as bilateral contouring for structure and panelling for strength (Kolarevic, 2003). Infrastructure typically found within aerospace, automotive, and shipbuilding industries, bilateral contouring is an organized matrix of horizontal and vertical interlocking ribs evenly distributed along a surface. These structures are monocoque and semi-monocoque assemblies composed of structural ribs and skinning attached by rivets and adhesives. Alternative, bi-lateral contouring discussed is an interlocking matrix of plywood strips having integral joinery for assembly. Unlike traditional methods of building representations through malleable materials for creating tangible objects (Friedman, 2002), this approach constructs with the implication for building life-size solutions. Three algorithms are presented as examples of rationalized design production with physical results. The first algorithm [Figure 1] deconstructs an initial 2D curved form into ribbed slices to be assembled through integral connections constructed as part of the rib solution. The second algorithm [Figure 2] deconstructs curved forms of greater complexity. The algorithm walks along the surface extracting surface information along horizontal and vertical axes saving surface information resulting in a ribbed structure of slight double curvature. The final algorithm [Figure 3] is expressed as plug-in software for Rhino that deconstructs a design to components for assembly as rib structures. The plug-in also translates geometries to a flatten position for 2D fabrication. The software demonstrates the full scope of the research exploration. Studies published by Dodgson argued that innovation technology (IvT) (Dodgson, Gann, Salter, 2004) helped in solving projects like the Guggenheim in Bilbao, the leaning Tower of Pisa in Italy, and the Millennium Bridge in London. Similarly, the method discussed in this paper will aid in solving physical production problems with complex building forms. References Bentley, P.J. (Ed.). Evolutionary Design by Computers. Morgan Kaufman Publishers Inc. San Francisco, CA, 1-73 Celani, G, (2004) “From simple to complex: using AutoCAD to build generative design systems” in: L. Caldas and J. Duarte (org.) Implementations issues in generative design systems. First Intl. Conference on Design Computing and Cognition, July 2004 Dodgson M, Gann D.M., Salter A, (2004), “Impact of Innovation Technology on Engineering Problem Solving: Lessons from High Profile Public Projects,” Industrial Dynamics, Innovation and Development, 2004 Dristas, (2004) “Design Operators.” Thesis. Massachusetts Institute of Technology, Cambridge, MA, 2004 Friedman, M, (2002), Gehry Talks: Architecture + Practice, Universe Publishing, New York, NY, 2002 Kolarevic, B, (2003), Architecture in the Digital Age: Design and Manufacturing, Spon Press, London, UK, 2003 Opas J, Bochnick H, Tuomi J, (1994), “Manufacturability Analysis as a Part of CAD/CAM Integration”, Intelligent Systems in Design and Manufacturing, 261-292 Rudolph S, Alber R, (2002), “An Evolutionary Approach to the Inverse Problem in Rule-Based Design Representations”, Artificial Intelligence in Design ’02, 329-350 Rich M, (1989), Digital Mockup, American Institute of Aeronautics and Astronautics, Reston, VA, 1989 Schön, D., The Reflective Practitioner: How Professional Think in Action. Basic Books. 1983 Shelden, D, (2003), “Digital Surface Representation and the Constructability of Gehry’s Architecture.” Diss. Massachusetts Institute of Technology, Cambridge, MA, 2003 Smithers T, Conkie A, Doheny J, Logan B, Millington K, (1989), “Design as Intelligent Behaviour: An AI in Design Thesis Programme”, Artificial Intelligence in Design, 293-334 Smithers T, (2002), “Synthesis in Designing”, Artificial Intelligence in Design ’02, 3-24 Stiny, G, (1977), “Ice-ray: a note on the generation of Chinese lattice designs” Environmental and Planning B, volume 4, pp. 89-98
keywords	Digital fabrication; bilateral contouring; integral connection; complex-curve
series	SIGRADI
email
last changed	2016/03/10 09:52

_id	e663
authors	Hanna, Samir L., Abel, John F. and Greenberg, Donald P.
year	1983
title	Intersection of Parametric Surfaces by Means of Look-Up Tables
source	IEEE Computer Graphics and Applications. October, 1983. vol. 3: pp. 39-48 : ill. (some col.). includes bibliography
summary	The intersection curve between parametric surfaces is important in such computer-aided design and manufacturing functions as shape design, analysis of drawing, design of fillets, and computation of numerically controlled tooling paths. The algorithm presented here provides an adequately accurate mathematical representation of the intersection curve. It also provides a database to simplify such operations as hidden-surface removal, surface rendering, profile identification, and interference or clearance computations. Further the algorithm facilitates creating and changing a finite element mesh in the intersection region
keywords	parametrization, curves, curved surfaces, algorithms, intersection
series	CADline
last changed	2003/06/02 13:58

_id	cbe9
authors	Jacob, Robert J.K.
year	1983
title	Using Formal Specifications in the Design of a Human-Computer Interface
source	Communications of the ACM April, 1983. vol. 26: pp. 259-264 : diagrams. includes bibliography.
summary	Formal specification techniques are valuable in software development because they permit a designer to describe the external behavior of a system precisely without specifying its internal implementation. Although formal specifications have been applied to many areas of software systems, they have not been widely used for specifying user interfaces. In the Military Message System project at the Naval Research Laboratory, the user interfaces as well as the other components of a family of message systems are specified formally, and prototypes are then implemented from the specifications. This paper illustrates the specification of the user interface module for the family of message systems. It then surveys specification techniques that can be applied to human-computer interfaces and divides the techniques into two categories: those based on state transition diagrams and those based on BNF. Examples of both types of specifications are given. Specification notations based on state transition diagrams are preferable to those based on BNF because the former capture the surface structure of the user interface more perspicuously. In either notation, high-level abstraction for describing the semantics of the user interface is needed, and an application-specific one is used here
keywords	user interface, design, theory
series	CADline
last changed	2003/06/02 13:58

_id	e21e
authors	Kajiya, J.T.
year	1983
title	New techniques for ray tracing procedurally defined objects
source	Computer Graphics, 17 3, 91-102
summary	We present new algorithms for efficient ray tracing of three procedurally defined objects: fractal surfaces, prisms, and surfaces of revolution. The fractal surface algorithm performs recursive subdi- vision adaptively. Subsurfaces which cannot intersect a given ray are culled from further consideration. The prism algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional ray-curve intersection problem, which is solved by the method of strip trees. The surface- of-revolution algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional curve-curve intersection problem, which again is solved by strip trees.
series	journal paper
last changed	2003/04/23 15:50

_id	0f6e
authors	Kalay, Yehuda E.
year	1983
title	Modular Menu Mapping and Hit-Testing
source	1983? 17 p. : ill. includes bibliography
summary	This paper introduces a method called MODULAR MENU MAPPING, which rationalizes menu layout and trades menu hit-test time with a look up table, thereby reducing the cost of determining the menu box inclusion of the cursor to a single unit of time. To overcome the problem of space required to store the look-up table, a hybrid method called RUN-LENGTH ENCODING is introduced. It reduces the storage space requirements by substituting the two-dimensional look-up table with a linear vector. It does however, require some search, which is nevertheless still much cheaper then the full search of a non-mapped menu
keywords	user interface, computer graphics
series	CADline
email
last changed	2003/06/02 13:58

_id	698a
authors	Liang, You-Dong and Barsky, Brian A.
year	1983
title	An Analysis and Algorithm for Polygon Clipping
source	Communications of the ACM November, 1983. vol. 26: pp. 868-877 : ill. includes bibliography.
summary	(This is one of the two standard algorithms for clipping. The other is the Sutherland-Hodgman reentrant algorithm). The process of polygon clipping is analyzed and the understanding gained thereby forms the foundation of a very direct algorithm. Each edge of the input polygon is considered to be a vector and is then extended to be a line of infinite extent. The boundary line segments of the clip window are extended in a similar fashion to become boundary lines. The intersection points of an extended edge with the boundary lines are identified as entry or exit points. It is observed that these entry and exit points can be used to characterize the visibility status of the edge. Not only might the edge have a visible segment, but it can also induce the inclusion in the output polygon of a vertex at a corner of the clip window called a turning vertex. To quantify the visibility conditions, the edge is written in parametric form. The possible contributions (including nil) that can be provided to the output polygon by a particular edge are established. This analysis is then embedded in an algorithm. An arbitrary example input polygon is given and the output of the algorithm is shown. The execution time for this example using this algorithm is measured to be half of what is required by the standard Sutherland-Hodgman reentrant polygon clipping algorithm
keywords	polygons, clipping, algorithms, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	sigradi2005_037
id	sigradi2005_037
authors	Maciel, Mario
year	2005
title	Interactive virtual art
source	SIGraDi 2005 - [Proceedings of the 9th Iberoamerican Congress of Digital Graphics] Lima - Peru 21-24 november 2005, vol. 1, pp. 37-41
summary	The interactivity presumes behavior action events exercised mutually between machines, between digital information and persons, between two or more persons, machines and digital information in real time. Nelson Max presented in Paris the first interactive landscape in 1983. The pioneer of scientific image was Ivan Sutherland, researcher of Massachusetts Institute of Technology (MIT). Another fundamental reference is Sonia Sheridan that invented a system where the user could modify the original image and visualize the result in real time. In Brazil, as well as in the outside, artists in assembly with scientists, see developing works computacionais with resorts of immersion and interatividade. Like this, in that search of new references, the text presents initially the main concepts about interactive virtual art and analyzes two important expositions: Emoção Art.Ficial 2.0 and Maior ou igual a 4D: computer art interactive. [Full paper in Portuguese]
series	SIGRADI
email
last changed	2016/03/10 09:55

_id	e806
authors	Maver, T.W.
year	1987
title	The New Studio: CAD and the Workstation - State of the Art
doi	https://doi.org/10.52842/conf.ecaade.1987.x.g1r
source	Architectural Education and the Information Explosion [eCAADe Conference Proceedings] Zurich (Switzerland) 5-7 September 1987.
summary	This presentation draws on three main sources: (i) reportage of the ATHENA project at MIT, (ii) the experience of the author as a Professor of CAAD, (iii) the work of the eCAADe on the social impacts of CAAD. // Project ATHENA was introduced to MIT in May 1983 as an experiment in the potential uses of advanced computer technology throughout the University curriculum. By the end of the project a network of about 2000 high performance graphics workstations - supplied mainly by IBM and DEC - will have been installed; about half of MIT's $20 million investment is being devoted to the development of new applications software for teaching across almost all the academic Departments, including Architecture.
series	eCAADe
email
last changed	2022/06/07 07:50

_id	e0d1
authors	Mollaert Marijke
year	1983
title	Interactivity and Graphics as a Support for the Design of Cable Nets and Trusses
doi	https://doi.org/10.52842/conf.ecaade.1983.x.l4u
source	Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. IV.26-IV.41
summary	This paper deals with an important aspect concerning the quality of a computer aided design (CAD) program, namely the human-computer interface. To fix the ideas,the user interface of FORCE, a program for the design and visualisation of cable nets and trusses, is considered The new design of this user interface was necessary to support an easy extension of the dialogue, both alpha-numerical and graphical. The new approach includes a separation of the interaction procedures and the application modules.
keywords	CAD, Human-computer Interface
series	eCAADe
email
more	http://wwwtw.vub.ac.be/ond/arch/pages/marijke
last changed	2022/06/07 07:50

_id	08c4
authors	Mylopoulos, John, Shibahara, Tetsutaro and Tsotsos, John K.
year	1983
title	Building Knowledge-Based Systems : The PSN Experience
source	IEEE Computer. IEEE Computer Society, October, 1983. vol. 16: pp. 83-88. includes bibliography
summary	Knowledge-representation languages have been classified traditionally as declarative or procedural, depending on whether their basic features come from mathematical logic or data structures on one hand, or from programming languages on the other hand. Procedural representation languages are particularly well suited for heuristic knowledge, and their use can lead to efficient searching on the part of an expert system. Many attempts have been made to integrate features of declarative and procedural representation languages. PSN is one attempt that focuses on the integration of semantic network and procedural notions
keywords	systems, knowledge base, semantic networks, integration,
series	CADline
last changed	2003/06/02 13:58

_id	ea43
authors	Roberts, Teresa L. and Moran, Thomas P.
year	1983
title	The Evaluation of Text Editors : Methodology and Empirical Results
source	Communications of the ACM. April 1983. vol. 26: pp. 265-283 : diagrams and tables. includes bibliography
summary	This paper presents a methodology for evaluating text editors on several dimensions: the time it takes experts to perform basic editing tasks, the time experts spend making and correcting errors, the rate at which novices learn to perform basic editing tasks, and the functionality of editors over more complex tasks. Time, errors, and learning are measured experimentally; functionality is measured analytically; time is also calculated analytically. The methodology has thus far been used to evaluate nine diverse text editors, producing an initial database of performance results. The database is used to tell us not only about the editors but also about the users - the magnitude of individual differences and the factors affecting novice learning
keywords	design, evaluation, word processing
series	CADline
last changed	2003/06/02 13:58

_id	6015
authors	Sakurai, H. and Gossard, D.
year	1983
title	Solid Model Input Through Orthographic Views
source	Computer Graphics, Vol 17, No 3, July
summary	This paper describes the results of basic studies on procedures for creating solid models of component geometry from two-dimensional orthographic projections. An interactive graphic program was developed to allow the input of three orthographic views of a component geometry by digitizing from a drawing. The views may contain straight lines and circular arcs, solid or dashed. No restrictions are placed on the order or direction of lines and arcs in any view. Using an extension of the Wesley-Markowski procedure, the program constructs a three-dimensional solid model of the object. When the projections are ambiguous, multiple solid models are produced. The solid model may contain planar, cylindrical, conical, spherical and toroidal surfaces. Topological information of the solid model is sotred in a winged edge sturcture. Geometric information is stored as vertex coordinates and surface equations.
series	journal paper
last changed	2003/04/23 15:14

_id	a3b0
authors	Schubert, Lenhart K., Papalaskaris, Mary Angela and Taugher, Lay
year	1983
title	Determining Type, Part, Color, and Time Relationships
source	IEEE Computer. IEEE Computer Society, October, 1983. vol. 16: pp. 53-60 : ill. Includes bibliography
summary	Several kinds of inference problems arise constantly in question-answering processes, which without special handling can absorb large computational resources. One kind requires determining how two types of things are related, others require determining these or similar relationships among parts of objects, color or times. As people we are equippedÔ h) 000*°° ÔŒ with certain sensory organs, we have special ways of modeling our perception of color, categorizing and cross-correlating the entities whose localization in space and persistence in time renders them cognitively coherent and of analyzing spatial properties, such as parts structure. To match our cognitive skills AI system will need analogous special methods. The methods described in this paper are designed to supplement a deductive question-answering algorithm that is now operational. The algorithm draws on a base of logical propositions organized as semantic net
keywords	semantic networks, AI, inference, perception, cognition, color, patterns, algorithms
series	CADline
last changed	2003/06/02 13:58

_id	20d4
id	20d4
authors	Sequin, Carlo H. and P.S. Strauss
year	1983
title	UNIGRAFIX
source	ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 374-381 : ill. includes bibliography.
summary	UNIGRAFIX is a three-dimensional graphics modeling environment that runs under the UNIX operating system. It comprises a terse, human-readable descriptive language that allows scene files of complex objects to be created with little overhead. These scenes can be used as input to a set of UNIGRAFIX programs which can be run either as separate functional units, or from within the interactive UNIGRAFIX environment. Programs are available to transform and illuminate the scene descriptions and to display them in a variety of styles on various output devices. The built-in hidden-face and hidden-line elimination routines use a scan- line algorithm which makes strong use of scan-line coherence as well as object coherence.
series	CADline
type	normal paper
last changed	2005/10/05 07:42

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