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	9203
authors	Winston, P. and Horn
year	1989
title	LISP
source	Addison-Wesley, Reading, MA (3rd. edition)
summary	The new edition retains the broad coverage of previous editions that has made this book popular both with beginners and with more advanced readers---coverage ranging from the basics of the language to detailed examples showing Lisp in practice. Based on the CommonLisp standard, this book also introduces CommonLisp's object system, CLOS, and the productivity-promoting techniques enabled by object-oriented programming. Application examples drawn from expert systems, natural language interfaces, and symbolic mathematics are featured, and new applications dealing with probability bounds, project simulation, and visual object recognition are introduced.
series	other
last changed	2003/04/23 15:14

_id	0e93
authors	Af Klercker, Jonas
year	1989
title	Interactive Animation on the Macintosh II
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 9.5.1-9.5.6
doi	https://doi.org/10.52842/conf.ecaade.1989.x.a0t
summary	The efficiency of images in communication between humans has so far been used almost exclusively by TV and other mass medias. The costs have been too great to encourage the use of images in the financially restricted everyday practice of architecture. With a range of application programs for the Apple Macintosh II the vision has come close to reality. It is now possible to create guided walks with the chance to choose different routes and views in a model of buildings and surroundings in 256 colour graphics. The makers of these programs may not have foreseen this use for their products and that is why it takes quite a lot of effort to make all the necessary images. With some supplementary routines however, this will be made much easier. Animation can also be used to visualize different processes inside a building. We have been studying the working environment in mechanical industry. The goal of this project is to make communication possible between the workers at all levels of an organization in planning changes and has so far been very successful. The use of this technique is only limited by our imagination and funding. Some examples to be tested in the near future are "Escape at a fire", "Animation of a Dairy", "Traffic situations in a parking lot-, "CAD-working place" and others. One of the difficulties in interactive planning with users has been to come close enough to their reality. With animated images it is possible to visualize what is going to happen and what it is going to look like in a more understandable way. In education this must be a challenging possibility. Changes and processes are some of the most difficult subjects to describe and explain! The software used is a handful of individual programs which, thanks to the graphics standards of the Macintosh, can exchange data with each other.
series	eCAADe
email
more	http://www.caad.lth.se/
last changed	2022/06/07 07:50

_id	417a
authors	Cipriani, R., Lagomarsino, A.D., Stagnaro, A., Valenti, E. and Sambolino, T.
year	1990
title	Some Years' Experience Teaching CAAD
source	The Electronic Design Studio: Architectural Knowledge and Media in the Computer Era [CAAD Futures ‘89 Conference Proceedings / ISBN 0-262-13254-0] Cambridge (Massachusetts / USA), 1989, pp. 347-361
summary	In the conventional way of teaching architecture, it is common to think of design as the final synthesis of an intellectual process (composizione in Italian) integrating different elements from different curriculum subjects: history, structural analysis., technology, regional and urban planning, and so on. These elements, being comprehensive of their specific domains, together build the project. This process is supported by a long traditional that cannot easily be modified; however, we must not consider it to be the only one. Architectural practice should be much more. The Scuole di Architettura has walked a long and difficult road in the last thirty years., with a significant widening of interest in social, political, and economic issues. There have been recurring attempts at epistemological reformulation in some areas. There has been an acknowledgment of a crisis in contemporary town planning and a dimming of several certitudes that had developed with the birth and growth of the modernist school. And there has been a weakening of the promises that had given life to the vigorous discussion about town and regional planning. All of this leads to a reconsideration of the meaning and the deeper assumptions that the project implies, a question mark at the center of the human sciences that architectural practice involves. The old tradition., which assigned composition a central role in the project, is no longer sufficient because it is related to a reductive reading of epistemology that views human sciences as defining segments of physical knowledge of the actual world. Contemporary reflection on the difference between understanding and unfolding, together with the attention given to interpreting a moment as compared to purely describing one, gives to the project the task of inquiry instead of solution.
series	CAAD Futures
last changed	1999/04/03 17:58

_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	0711
authors	Kunnath, S.K., Reinhorn, A.M. and Abel, J.F.
year	1990
title	A Computational Tool for Evaluation of Seismic Performance of RC Buildings
source	February, 1990. [1] 15 p. : ill. graphs, tables. includes bibliography: p. 10-11
summary	Recent events have demonstrated the damaging power of earthquakes on structural assemblages resulting in immense loss of life and property (Mexico City, 1985; Armenia, 1988; San Francisco, 1989). While the present state-of-the-art in inelastic seismic response analysis of structures is capable of estimating response quantities in terms of deformations, stresses, etc., it has not established a physical qualification of these end-results into measures of damage sustained by the structure wherein system vulnerability is ascertained in terms of serviceability, repairability, and/or collapse. An enhanced computational tool is presented in this paper for evaluation of reinforced concrete structures (such as buildings and bridges) subjected to seismic loading. The program performs a series of tasks to enable a complete evaluation of the structural system: (a) elastic collapse- mode analysis to determine the base shear capacity of the system; (b) step-by-step time history analysis using a macromodel approach in which the inelastic behavior of RC structural components is incorporated; (c) reduction of the response quantities to damage indices so that a physical interpretation of the response is possible. The program is built around two graphical interfaces: one for preprocessing of structural and loading data; and the other for visualization of structural damage following the seismic analysis. This program can serve as an invaluable tool in estimating the seismic performance of existing RC buildings and for designing new structures within acceptable levels of damage
keywords	seismic, structures, applications, evaluation, civil engineering, CAD
series	CADline
last changed	2003/06/02 14:41

_id	86ad
authors	Pittioni, Gernot
year	1989
title	CAAD at the Technical University of Munich - Features of Education and Research
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 4.4.1-4.4.7
doi	https://doi.org/10.52842/conf.ecaade.1989.x.w4j
summary	The educational outlines used by the German, and most other European schools of architecture, have certain differences in comparison to an American school. This is partly due to the different tasks each group has to fulfill. Our architects not only plan their projects in detail, but in many cases they have to supervise the site as well. Most importantly, they also check on all communications between those participating in the design process. Skills of architects leaving their schools and entering into practical life generally need further training. Since CAAD is becoming more and more involved in architectural design studios of various sizes, the development of skills in this area should be shifted towards the period of studies. Thus, schools and staffs have to react to meet the needs of the present facts.
series	eCAADe
email
last changed	2022/06/07 07:50

_id	1920
authors	Riesbeck, C. and Schank, R.C.
year	1989
title	Inside Case-based Reasoning
source	Lawrence Erlbaum Associates, Hillsdale, NJ
summary	Case-based reasoning, broadly construed, is the process of solving new problems based on the solutions of similar past problems. An auto mechanic who fixes an engine by recalling another car that exhibited similar symptoms is using case-based reasoning. A lawyer who advocates a particular outcome in a trial based on legal precedents is using case-based reasoning. It has been argued that case-based reasoning is not only a powerful method for computer reasoning, but also a pervasive behavior in everyday human problem solving. Case-based reasoning (CBR) has been formalized as a four-step process:N 1. Retrieve: Given a target problem, retrieve cases from memory that are relevant to solving it. A case consists of a problem, its solution, and, typically, annotations about how the solution was derived. For example, suppose Fred wants to prepare blueberry pancakes. Being a novice cook, the most relevant experience he can recall is one in which he successfully made plain pancakes. The procedure he followed for making the plain pancakes, together with justifications for decisions made along the way, constitutes Fred's retrieved case. 2. Reuse: Map the solution from the previous case to the target problem. This may involve adapting the solution as needed to fit the new situation. In the pancake example, Fred must adapt his retrieved solution to include the addition of blueberries. 3. Revise: Having mapped the previous solution to the target situation, test the new solution in the real world (or a simulation) and, if necessary, revise. Suppose Fred adapted his pancake solution by adding blueberries to the batter. After mixing, he discovers that the batter has turned blue -- an undesired effect. This suggests the following revision: delay the addition of blueberries until after the batter has been ladled into the pan. 4. Retain: After the solution has been successfully adapted to the target problem, store the resulting experience as a new case in memory. Fred, accordingly, records his newfound procedure for making blueberry pancakes, thereby enriching his set of stored experiences, and better preparing him for future pancake-making demands. At first glance, CBR may seem similar to the rule-induction algorithmsP of machine learning.N Like a rule-induction algorithm, CBR starts with a set of cases or training examples; it forms generalizations of these examples, albeit implicit ones, by identifying commonalities between a retrieved case and the target problem. For instance, when Fred mapped his procedure for plain pancakes to blueberry pancakes, he decided to use the same basic batter and frying method, thus implicitly generalizing the set of situations under which the batter and frying method can be used. The key difference, however, between the implicit generalization in CBR and the generalization in rule induction lies in when the generalization is made. A rule-induction algorithm draws its generalizations from a set of training examples before the target problem is even known; that is, it performs eager generalization. For instance, if a rule-induction algorithm were given recipes for plain pancakes, Dutch apple pancakes, and banana pancakes as its training examples, it would have to derive, at training time, a set of general rules for making all types of pancakes. It would not be until testing time that it would be given, say, the task of cooking blueberry pancakes. The difficulty for the rule-induction algorithm is in anticipating the different directions in which it should attempt to generalize its training examples. This is in contrast to CBR, which delays (implicit) generalization of its cases until testing time -- a strategy of lazy generalization. In the pancake example, CBR has already been given the target problem of cooking blueberry pancakes; thus it can generalize its cases exactly as needed to cover this situation. CBR therefore tends to be a good approach for rich, complex domains in which there are myriad ways to generalize a case.
series	other
last changed	2003/04/23 15:14

_id	3964
authors	Yoshikawa, H. and Gossard, D. (eds.)
year	1989
title	Intelligent CAD
source	North-Holland, Amsterdam, pp. vii-ix
summary	In this research, design process knowledge is represented at two different levels, action level and object level, corresponding to the meta-knowledge to model design behaviors and the special knowledge to model the processes in designing particular objects. A design knowledge base and database modeling language - Integrated Data Description Language (IDDL) was developed at the University of Tokyo to model both design processes and design objects. This language combines logic programming functions and object oriented programming functions into an integrated environment. Using this language, an intelligent CAD system - Intelligent Integrated Interactive CAD (IIICAD) was developed at the University of Tokyo. Contradictions of knowledge base and database are resolved using circumscription and Assumption-based Truth Maintenance System (ATMS) in this system. Many advanced knowledge modeling techniques, including Qualitative Process Theory (QPT), modal logic, default reasoning, etc., have also been introduced in the IIICAD system. The knowledge base and database representation scheme of IDDL serves as the basis in the feature-based integrated concurrent design system. In the integrated concurrent design system, a new feature modeling language was introduced. In addition to the qualitative and quantitative data/relations that were introduced in IDDL, the composing element features, data dependency relations, constraints, 2D and 3D feature geometric descriptions have also been introduced for representing product life-cycle models and their relations. Optimization functions were added to the integrated concurrent design system to identify the optimal design considering relevant life-cycle aspects.
series	other
last changed	2003/04/23 15:14

_id	45e6
authors	Agger, Kristian and Lentz, Uffe (Eds.)
year	1989
title	CAAD: Education - Research and Practice [Conference Proceedings]
source	eCAADe Conference Proceedings / ISBN 87-982875-2-4 / Aarhus (Denmark) 21-23 September 1989
doi	https://doi.org/10.52842/conf.ecaade.1989
summary	In the announcement of the sixth eCAADe Conference we stated that It is held at a time where CAAD is moving into practice very fast, with heavy influence on research and education. We stated that research is directed towards the early design phases, and that education is facing the problem of mass education. In that situation much benefit can be obtained from collaboration with practice. We decided to give the conference the title “CAAD: Education - Research and Practice” to state the importance of practice as a test bench. The conference papers cover education and research in depth in many important areas and give a good overview, whereas the practical theme is more or less missing, indicating, that experience here is still modest. At the lecture material market and the exhibition the situation is opposite and shows state of art in practical use.
series	eCAADe
email
last changed	2022/06/07 07:49

_id	450c
authors	Akin, Ömer
year	1990
title	Computational Design Instruction: Toward a Pedagogy
source	The Electronic Design Studio: Architectural Knowledge and Media in the Computer Era [CAAD Futures ‘89 Conference Proceedings / ISBN 0-262-13254-0] Cambridge (Massachusetts / USA), 1989, pp. 302-316
summary	The computer offers enormous potential both in and out of the classroom that is realized only in limited ways through the applications available to us today. In the early days of the computer it was generally argued that it would replace the architect. When this idea became obsolete, the prevailing opinion of proponents and opponents alike shifted to the notion of the computer as merely adding to present design capabilities. This idea is so ingrained in our thinking that we still speak of "aiding" design with computers. It is clear to those who grasp the real potential of this still new technology - as in the case of many other major technological innovations - that it continues to change the way we design, rather than to merely augment or replace human designers. In the classroom the computer has the potential to radically change three fundamental ingredients: student, instruction, and instructor. It is obvious that changes of this kind spell out a commensurate change in design pedagogy. If the computer is going to be more than a passive instrument in the design studio, then design pedagogy will have to be changed, fundamentally. While the practice of computing in the studio continues to be a significant I aspect of architectural education, articulation of viable pedagogy for use in the design studio is truly rare. In this paper the question of pedagogy in the CAD studio will be considered first. Then one particular design studio taught during Fall 1988 at Carnegie Mellon University will be presented. Finally, we shall return to issues of change in the student, instruction, and instructor, as highlighted by this particular experience.
series	CAAD Futures
email
last changed	2003/11/21 15:15

_id	sigradi2012_30
id	sigradi2012_30
authors	Angeluzzi, Gustavo; Hanns, Daniela Kutschat
year	2012
title	Um levantamento de requisitos gerais para o desenvolvimento e posicionamento de DOOTERS – um aplicativo lúdico de listas de tarefas para iPhone [A survey of general requirements for developing and positioning DOOTERS - a to-do list application for iPhone]
source	SIGraDi 2012 [Proceedings of the 16th Iberoamerican Congress of Digital Graphics] Brasil - Fortaleza 13-16 November 2012, pp. 191-195
summary	DOOTERS is a to-do list application for iPhone which entertains and motivates the user to get things done. It was developed based on requirements obtained trough: 1. the study of several personal information organizing methods (Covey, 1989; Allen, 2005; Foster, 2006); 2. answers to a task lists user focused questionnaire; 3. observation of to-do list users while creating lists and organizing tasks; 4. comparison of digital and non-digital task list media (paper, computer and mobile device); 5. analysis of profiles, behaviors and to-do list applications for iPhone. In this paper, the authors present the process of obtaining requirements for developing and positioning DOOTERS.
keywords	information and interface design, requirements, to-do list application, iPhone, DOOTERS
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	a74a
authors	Asanowicz, Alexander
year	1989
title	Four Easy Questions
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 9.18.1-9.18.4
doi	https://doi.org/10.52842/conf.ecaade.1989.x.x8v
summary	Should we teach CAAD? - yes, but why? Answer to this question is clear too. Question three - "when?" - on the 5, 6 and 7 term. Why so rate? - it is a compromise because "Architecture is an art" and students of architecture should know how to make a project without computers. How to teach CAAD? - we should teach haw to use professional computer programs and not programming. We must work out a new manual for architects. It should be constructed in such a way as to correspond to consecutive steps of the architectural design process.
keywords	CAAD, Manuals, Architectural Design Process
series	eCAADe
email
last changed	2022/06/07 07:50

_id	4032
authors	Barron, Christopher L.
year	1989
title	3-D Modelling
source	architectural and Engineering Systems. April, 1989. [41] -56 unevenly numbered
summary	From screen to structure, more and more AEs are finding design solutions in the third dimension. The author reviews current 3-D modeling systems, what are the expectations of the users and the developers goals
keywords	architecture, practice, drafting, modeling, systems
series	CADline
last changed	2003/06/02 13:58

_id	29d2
authors	Barsky, Brian A. and DeRose,Tony D.
year	1989
title	Geometric Continuity of Parametric Curves: Three Equivalent Characterizations
source	IEEE Computer Graphics and Applications. November, 1989. vol. 9: pp. 60-68 : ill. includes bibliography
summary	Geometric continuity of curves has received a good deal of research attention in recent years. The purpose of this article is to distill some of the important basic results into a self-contained presentation. The January 1990 issue of CG&M presents a paper that continues the discussion by offering applications of the theoretical background provided here
keywords	continuity, parametrization, curves, computational geometry, representation
series	CADline
last changed	2003/06/02 13:58

_id	4cf2
authors	Barsky, Brian A.
year	1990
title	Geometric Continuity of Parametric Curves : Constructions of Geometrically Continuous Splines
source	IEEE Computer Graphics and Applications. January, 1990. vol. 10: pp. 60-68 : ill
summary	This article is part two of an article published in November 1989. In the first article theoretical foundations for geometric continuity were presented. In this article the basic theory was applied to the construction of geometrically continuous spline curves
keywords	Bezier, curves, curved surfaces, splines, continuity, computational geometry, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	1e3d
authors	Bernard, Rusty
year	1989
title	USL/State Facility Planning and Control Automation Pilot Project
source	New Ideas and Directions for the 1990’s [ACADIA Conference Proceedings] Gainsville (Florida - USA) 27-29 October 1989, pp. 179-192
doi	https://doi.org/10.52842/conf.acadia.1989.179
summary	State supported Universities often lend a helping hand to their state by providing services which may be difficult or impossible to acquire otherwise. This presentation reviews the process of computer aided facility management with special reference to a recently completed joint venture project to fully automate Louisiana's Facility Planning and Control services.
series	ACADIA
last changed	2022/06/07 07:52

_id	82b9
authors	Beyers, Robert and Desa, Subhas
year	1989
title	Design of Control Systems for Performance : A Constraint Mapping Approach
source	17 p. : ill Engineering Design Research Center, CMU, October, 1989. EDRC 24-10-89. includes bibliography.
summary	Simple s-plane maps are used to graphically reveal interactions of performance requirements and constraints thus providing a control system designer insight into performance trade-offs. Two well-known but powerful ideas underlie this approach: (a) the characteristic equation of an nth-order system can be fully described by the specification of n variables and (b) any dynamic performance requirement or constraint can be expressed in terms of 2n variables of which n describe the open-loop and n describe the closed-loop characteristic equations. An example illustrates the application of the approach to controller design
keywords	constraints, engineering, control, systems, design, performance
series	CADline
last changed	2003/06/02 13:58

_id	6bfa
authors	Bijl, Aart
year	1989
title	Evaluation and Representation
source	December, 1989. 11 p. : ill. includes bibliography
summary	In this paper the author will consider four key concepts: design, evaluation, models, and representation. In combination, definitions of these concepts impinge on each other and they are further conditioned by the author intention to represent design knowledge within computers. The issue of human-computer interaction then becomes critical to the usefulness of knowledge representations for designers
keywords	CAD, representation, design, evaluation
series	CADline
last changed	1999/02/12 15:07

_id	e19d
authors	Birmingham, William P. and Siewiorek, Daniel P.
year	1989
title	Capturing Designer Expertise : The CGEN System
source	18 p. : ill Pittsburgh, PA: Engineering Design Research Center, CMU, August, 1989. EDRC 18-08-89. includes bibliography.
summary	Knowledge-based systems are becoming pervasive in the computer-aided design area. For these systems to achieve satisfactory levels of performance large amounts of knowledge are necessary. However, the acquisition of knowledge is a difficult and tedious task. Automated knowledge-acquisition tools (AKAT) provide capabilities for quickly building and maintaining knowledge-bases. This paper describes the CGEN AKAT, which allows hardware designers, unfamiliar with artificial intelligence programming techniques, to deposit their expertise into a synthesis tool's knowledge-base. A set of experiments which tested CGEN's capabilities are presented. The experiments show that with CGEN hardware designers can produce high quality knowledge-bases
keywords	CAD, automation, knowledge acquisition, tools, AI, programming, knowledge base, systems, integrated circuits, hardware
series	CADline
last changed	2003/06/02 10:24

_id	4bf3
authors	Blinn, James F.
year	1989
title	Optimal Tubes
source	IEEE Computer Graphics and Applications. September, 1989. vol. 9: pp. 8-13 : ill. (some col.)
summary	The author discusses how to cut down the number of polygons required to model and render the Voyager spacecraft. The geometric problem is to find the tangent lines from a point to a circle. There are two ways to go about solving this, one using garden-variety analytical geometry and the other using high tech homogeneous coordinates. The author in this column discusses the simple way
keywords	programming, geometry, algorithms, computer graphics, techniques
series	CADline
last changed	2003/06/02 13:58

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