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	298e
authors	Dave, Bharat and Woodbury, Robert
year	1990
title	Computer Modeling: A First Course in Design Computing
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. 61-76
summary	Computation in design has long been a focus in our department. In recent years our faculty has paid particular attention to the use of computation in professional architectural education. The result is a shared vision of computers in the curriculum [Woodbury 1985] and a set of courses, some with considerable historyland others just now being initiated. We (Dave and Woodbury) have jointly developed and at various times over the last seven years have taught Computer Modeling, the most introductory of these courses. This is a required course for all the incoming freshmen students in the department. In this paper we describe Computer Modeling: its context, the issues and topics it addresses, the tasks it requires of students, and the questions and opportunities that it raises. Computer Modeling is a course about concepts, about ways of explicitly understanding design and its relation to computation. Procedural skills and algorithmic problem solving techniques are given only secondary emphasis. In essential terms, the course is about models, of design processes, of designed objects, of computation and of computational design. Its lessons are intended to communicate a structure of such models to students and through this structure to demonstrate a relationship between computation and design. It is hoped that this structure can be used as a framework, around which students can continue to develop an understanding of computers in design.
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	6b83
authors	Carrara, G., Fioravanti, A. and Novembri, G.
year	1989
title	Towards a New Generation of Computer Assistants for Architectural Design: An Existing Scenario
doi	https://doi.org/10.52842/conf.ecaade.1989.x.f9h
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 8.3.1.8.3.10
summary	The context in which designers operate is becoming more and more complex, owing to the large number of codes, new materials, technologies and professional figures; new instruments are needed, therefore, to support and verify design activity. The results obtained in the first years of 'computer era' were barely sufficient. The hardware and software available today is capable of producing a new generation of CAD systems which can aid the designer in the process of conceiving and defining building objects. At the CAD Laboratory in the Department of Building and Environmental Control Techniques at the 'La Sapienza' University of Rome, research is being carried out with the aim of defining a new kind of Knowledge-based assistant for architectural design. To this purpose a partnership has been established whit a private firm called CARTESIANA, whose partners are software houses, designing and building associations.
keywords	Knowledge-Based Architectural Design
series	eCAADe
last changed	2022/06/07 07:50

_id	avocaad_2001_02
id	avocaad_2001_02
authors	Cheng-Yuan Lin, Yu-Tung Liu
year	2001
title	A digital Procedure of Building Construction: A practical project
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	In earlier times in which computers have not yet been developed well, there has been some researches regarding representation using conventional media (Gombrich, 1960; Arnheim, 1970). For ancient architects, the design process was described abstractly by text (Hewitt, 1985; Cable, 1983); the process evolved from unselfconscious to conscious ways (Alexander, 1964). Till the appearance of 2D drawings, these drawings could only express abstract visual thinking and visually conceptualized vocabulary (Goldschmidt, 1999). Then with the massive use of physical models in the Renaissance, the form and space of architecture was given better precision (Millon, 1994). Researches continued their attempts to identify the nature of different design tools (Eastman and Fereshe, 1994). Simon (1981) figured out that human increasingly relies on other specialists, computational agents, and materials referred to augment their cognitive abilities. This discourse was verified by recent research on conception of design and the expression using digital technologies (McCullough, 1996; Perez-Gomez and Pelletier, 1997). While other design tools did not change as much as representation (Panofsky, 1991; Koch, 1997), the involvement of computers in conventional architecture design arouses a new design thinking of digital architecture (Liu, 1996; Krawczyk, 1997; Murray, 1997; Wertheim, 1999). The notion of the link between ideas and media is emphasized throughout various fields, such as architectural education (Radford, 2000), Internet, and restoration of historical architecture (Potier et al., 2000). Information technology is also an important tool for civil engineering projects (Choi and Ibbs, 1989). Compared with conventional design media, computers avoid some errors in the process (Zaera, 1997). However, most of the application of computers to construction is restricted to simulations in building process (Halpin, 1990). It is worth studying how to employ computer technology meaningfully to bring significant changes to concept stage during the process of building construction (Madazo, 2000; Dave, 2000) and communication (Haymaker, 2000).In architectural design, concept design was achieved through drawings and models (Mitchell, 1997), while the working drawings and even shop drawings were brewed and communicated through drawings only. However, the most effective method of shaping building elements is to build models by computer (Madrazo, 1999). With the trend of 3D visualization (Johnson and Clayton, 1998) and the difference of designing between the physical environment and virtual environment (Maher et al. 2000), we intend to study the possibilities of using digital models, in addition to drawings, as a critical media in the conceptual stage of building construction process in the near future (just as the critical role that physical models played in early design process in the Renaissance). This research is combined with two practical building projects, following the progress of construction by using digital models and animations to simulate the structural layouts of the projects. We also tried to solve the complicated and even conflicting problems in the detail and piping design process through an easily accessible and precise interface. An attempt was made to delineate the hierarchy of the elements in a single structural and constructional system, and the corresponding relations among the systems. Since building construction is often complicated and even conflicting, precision needed to complete the projects can not be based merely on 2D drawings with some imagination. The purpose of this paper is to describe all the related elements according to precision and correctness, to discuss every possibility of different thinking in design of electric-mechanical engineering, to receive feedback from the construction projects in the real world, and to compare the digital models with conventional drawings.Through the application of this research, the subtle relations between the conventional drawings and digital models can be used in the area of building construction. Moreover, a theoretical model and standard process is proposed by using conventional drawings, digital models and physical buildings. By introducing the intervention of digital media in design process of working drawings and shop drawings, there is an opportune chance to use the digital media as a prominent design tool. This study extends the use of digital model and animation from design process to construction process. However, the entire construction process involves various details and exceptions, which are not discussed in this paper. These limitations should be explored in future studies.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	e33a
authors	De Cola, S., De Cola, B. and Pentasuglia, Francesco
year	1990
title	Messina 1908: The Invisible City
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. 239-246
summary	The initial purposes of this work were to build a 3D model of the old city of Messina and to reconstruct a walk through it; to understand the "Ghost city," the parts that form it, and the rules of its plan, which are explicit in some cases but hidden most of the time; to measure its space, appreciate the similarities to and differences from modern city plans, and use the information to improve the plans of tomorrow. It might seem a useless study of a nonexistent city, and yet during the months of detailed work, of patient reconstruction from the surveys and photographs of the city destroyed in 1908, we began to consider how it was still possible to obtain spatial values of and to project behaviors in the lost city, in other words, to practice tests on memory that are very interesting for people working in a context in which memory no longer exists. The work presented here is the first stage of a more complex research project still to be carried out on Messina as it was at the end of the nineteenth century. Here we constructed a 3D model of some parts of the city prior to the earthquake of 1908 and made a five-minute video, using cartoon techniques, of an "impossible" walk through the city. The fragments of the city were reconstructed from available documentary sources, primarily photographic images, which tended to be of the most important places in the city.
series	CAAD Futures
last changed	1999/04/03 17:58

_id	4f00
authors	Gero, John S. and Sudweeks, F. (editors)
year	1989
title	Expert Systems in Engineering, Architecture and Construction
source	360 p University of Sydney: 1989. CADLINE has abstract only.
summary	Engineering involves both cognitive and calculational processes. It involves judgement as well as numeracy. Cognitive processes and judgement are better served by expert systems than other existing technologies. Expert systems are not designed to replace technologies currently used in engineering, rather they are and will continue to augment them. Clearly, better tools are needed and further education of engineers is needed. This conference aims to provide a forum for the presentation of developments and applications of expert systems in engineering, primarily in Australasia. The 20 papers accepted for presentation span the spectrum of engineering applications of expert systems from analysis and diagnosis, through simulation and modeling, learning, to design and synthesis
keywords	expert systems, knowledge base, design process, architecture, structures, engineering, construction, analysis, simulation, modeling, learning, synthesis
series	CADline
email
last changed	2003/06/02 13:58

_id	f4fb
authors	Karasick, Michael
year	1989
title	On the Representation and Manipulation of Rigid Solids
source	McGill University, Department of Computer Science, Montreal
summary	Solid modeling studies how to represent geometric properties of solids by computer. A fundamental operation is the construction of representations of solids. Algorithms for set operations construct boundary representations of solids from boundary representations of other solids. A correct and efficient intersection algorithm for polyhedral solids that uses boundary representations is described. A finite-precision implementation of the algorithm uses incidence tests that use symbolic inference in order to limit errors due to finite-precision approximations. The incidence tests are described and experimental evidence is presented to show that the incidence tests are both empirically reliable and practical. The intersection algorithm uses a new boundary representation called the Star-Edge representation. A complementation algorithm for solids that uses the new representation is given, and an algorithm is given that uses the new representation to determine if two boundary representations describe the same solid. A canonical boundary representation for solids is described and used to prove a lower bound for the same-object problem.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	e6f5
authors	McLaughlin, S. and Gero, John S.
year	1989
title	Requirements of a Reasoning System that Supports Creative and Innovative Design Activity
source	Knowledge Based Systems. 1989. vol.2: pp. 62-71 : ill. includes bibliography
summary	Innovative and creative design occurs when fragments of previous design episodes are retrieved and incorporated into the present design context. This paper presents an implementable approach to innovative and creative design based on notions of prototypes and instances within a dynamic memory model of episodic memory. Innovative and creative design are defined in terms of operators. The requirements of a reasoning system to support these classes of design activity are outlined. Examples of the processes are presented
keywords	design, reasoning, creativity, prototypes, architecture
series	CADline
email
last changed	2003/06/02 10:24

_id	cf15
authors	Penttilä, Hannu
year	1989
title	Computer Aided Building Modeling
doi	https://doi.org/10.52842/conf.ecaade.1989.x.d2h
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 3.2.1-3.2.11
summary	The subject of computer-aided building modeling is often discussed in various contexts, sometimes without clear explanation of what is modelled. Usually modeling refers to 3-dimensional geometric modeling, but nowadays also conceptual modeling and mathematical simulation aspects are more and more evident. Building modeling should though be considered more widely than just plain geometric visualization. This paper establishes one common framework for discussion about different building modeling viewpoints arranging discipline viewpoints, approach methods, existing standards and application tools within one context. Although several viewpoints are declared conceptual building modeling is regarded the main emphasis of this paper, since it definitely will be one of the key issues in developing methods and tools for computer integrated construction (CIC) in the future.
keywords	Building Modeling, Building Information and Data, Product Modeling, Conceptual Modeling, Geometric Modeling, Standards, Application Programs
series	eCAADe
email
more	http://www.tut.fi/~penttila/index.html
last changed	2022/06/07 07:50

_id	6dc2
authors	Rahman, Shama
year	1989
title	The Realities of Introducing IT/CAD in Architectural and Interior Design Education: A Case Study at the Polytechnic of North London
doi	https://doi.org/10.52842/conf.ecaade.1989.x.j5h
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 4.1.1.-4.1.9
summary	This paper is an attempt to illustrate the realities of introducing Information Technology at a school of Architecture and Interior Design. The department, under the auspicies of the Polytechnic of North London, comprises of 520 full/part time students working towards various professional and postgraduate degrees and diplomas in Architecture and Interior Design. For the last 18 months, the department has undertaken a rapid IT/CAD implementation programme. This has involved developing a strategy, formulating resource needs and implementing teaching. The strategy is based on the concept of application of IT as a tool for design and a medium for representation, management, use and exchange of design information. A course outline has been developed suggesting what could be taught and who could be taught what, how, when and for how long. At the same time, different types of teaching methods are being experimented upon. On the basis of these factors, attempts are being made to meet resource needs for software, hardware, teaching and technical support. Various issues and problems have been brought to light e.g. overcoming cost of hardware and software, lack of teaching and technical support, finding time slots in overloaded curriculums, changing existing attitudes towards IT,etc. We have approached these problems in various ways. We liaise closely with architects' offices, and try to use student skills and expertise within the polytechnic. We try to overcome time-slot problems by joint teaching and assessment with other subjects and try to integrate IT/CAD with studio-based design projects by locating computlng facilities inside studios. This paper is a story of how we have set for ourselves a path to follow. This path is by no means rigid and will continuously change with new experiences and the demands of a volatile industry. We have only just begun.
series	eCAADe
last changed	2022/06/07 07:50

_id	avocaad_2001_19
id	avocaad_2001_19
authors	Shen-Kai Tang, Yu-Tung Liu, Yu-Sheng Chung, Chi-Seng Chung
year	2001
title	The visual harmony between new and old materials in the restoration of historical architecture: A study of computer simulation
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	In the research of historical architecture restoration, scholars respectively focus on the field of architectural context and architectural archeology (Shi, 1988, 1990, 1991, 1992, 1995; Fu, 1995, 1997; Chiu, 2000) or on architecture construction and the procedure of restoration (Shi, 1988, 1989; Chiu, 1990). How to choose materials and cope with their durability becomes an important issue in the restoration of historical architecture (Dasser, 1990; Wang, 1998).In the related research of the usage and durability of materials, some scholars deem that, instead of continuing the traditional ways that last for hundreds of years (that is to replace new materials with old ones), it might be better to keep the original materials (Dasser, 1990). However, unavoidably, some of the originals are much worn. Thus we have to first establish the standard of eliminating components, and secondly to replace identical or similar materials with the old components (Lee, 1990). After accomplishing the restoration, we often unexpectedly find out that the renewed historical building is too new that the sense of history is eliminated (Dasser, 1990; Fu, 1997). Actually this is the important factor that determines the accomplishment of restoration. In the past, some scholars find out that the contrast and conflict between new and old materials are contributed to the different time of manufacture and different coating, such as antiseptic, pattern, etc., which result in the discrepancy of the sense of visual perception (Lee, 1990; Fu, 1997; Dasser, 1990).In recent years, a number of researches and practice of computer technology have been done in the field of architectural design. We are able to proceed design communication more exactly by the application of some systematic softwares, such as image processing, computer graphic, computer modeling/rendering, animation, multimedia, virtual reality and so on (Lawson, 1995; Liu, 1996). The application of computer technology to the research of the preservation of historical architecture is comparatively late. Continually some researchers explore the procedure of restoration by computer simulation technology (Potier, 2000), or establish digital database of the investigation of historical architecture (Sasada, 2000; Wang, 1998). How to choose materials by the technology of computer simulation influences the sense of visual perception. Liu (2000) has a more complete result on visual impact analysis and assessment (VIAA) about the research of urban design projection. The main subjects of this research paper focuses on whether the technology of computer simulation can extenuate the conflict between new and old materials that imposed on visual perception.The objective of this paper is to propose a standard method of visual harmony effects for materials in historical architecture (taking the Gigi Train Station destroyed by the earthquake in last September as the operating example).There are five steps in this research: 1.Categorize the materials of historical architecture and establish the information in digital database. 2.Get new materials of historical architecture and establish the information in digital database. 3.According to the mixing amount of new and old materials, determinate their proportion of the building; mixing new and old materials in a certain way. 4.Assign the mixed materials to the computer model and proceed the simulation of lighting. 5.Make experts and the citizens to evaluate the accomplished computer model in order to propose the expected standard method.According to the experiment mentioned above, we first address a procedure of material simulation of the historical architecture restoration and then offer some suggestions of how to mix new and old materials.By this procedure of simulation, we offer a better view to control the restoration of historical architecture. And, the discrepancy and discordance by new and old materials can be released. Moreover, we thus avoid to reconstructing ¡§too new¡¨ historical architecture.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	8a0c
authors	Tan, Milton
year	1990
title	Saying What It Is by What It Is Like - Describing Shapes Using Line Relationships
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. 201-213
summary	Shapes - taken as well-defined collections of lines - are fundamental building blocks in architectural drawings. From doodles to shop drawings, shapes are used to denote ideas and represent elements of design, many of which ultimately translate into actual objects. But because designs evolve, the shapes representing a design are seldom static - instead, they are perpetually open to transformations. And since transformations involve relationships, conventional methods of describing shapes as sets of discrete endpoints may not provide an appropriate foundation for schematic design. This paper begins with a review of the perception of shapes and its significance in design. In particular, it argues that juxtapositions and inter-relationships of shapes are important seedbeds for creative development of designs. It is clear that conventional representation of shapes as sets of discrete lines does not cope with these -emergent" subshapes; the most basic of which arise out of intersecting and colinear lines. Attempts to redress this by using ‘reduction rules’ based on traditional point-and-line data structures are encumbered by computational problems of precision and shape specification. Basically, this means that some ‘close’ cases of sub-shapes may escape detection and their specifications are difficult to use in substitution operations. The paper presents the findings of a computer project - Emergence II - which explored a 'relational' description of shapes based on the concept of construction lines. It builds on the notion that architectural shapes are constructed in a graphic context and that, at a basic compositional level, the context can be set by construction lines. Accordingly, the interface enables the delineation of line segments with reference to pre-established construction lines. This results in a simple data structure where the knowledge of shapes is centralized in a lookup table of all its construction lines rather than dispersed in the specifications of line segments. Taking this approach, the prototype software shows the ease and efficiency of applying ‘reduction rules’ for intersection and colinear conditions, and for finding emergent sub-shapes by simply tracking the construction lines delimiting the ends of line segments.
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	2bb6
authors	Van Bakergem, Dave
year	1990
title	Image Collections in the Design Studio
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. 261-271
summary	No matter what the medium, architects are constantly using images in all aspects of design thinking. Whether it is the perception of the environment, an image in the mind's eye, an abstract drawing or a photographic record, designers use images to conceive of, and manipulate their design ideas. Managing these image collections occurs at a variety of levels in the creative process and is dependent on the type of image that is called upon for reference. The most basic example would be the image collection residing in the mind's memory which is a result of the designer’s world experiences and the relative impressiveness of each experience. Clearly, personal memory plays a significant role in the use of imagery in design, but it is unreliable and can be abstracted in uncontrollable ways. The sketchbook and later photographic collections of the grand tour were the beginnings of efforts to manage and utilize image collections as an aid to drawing and thinking about design. Now the capacity to use electronic means of creating, altering, storing, and retrieving images will enable designers to effectively use large image collections in ways that have not been possible before. This paper describes current work at the School of Architecture at Washington University in a graduate design studio. The students use a powerful 3D modeling CAD system (HOKDraw) to design and present their studio projects. In addition, we are experimenting with an image storage and retrieval system which is directly linked to the CAD model through a relational database (INGRES). Access to the database and images is instantly available through the command language and graphic display. The CAD model in effect becomes a 3D menu to an extensive image database stored on an optical memory disc recorder. Several collections are available to the studio members: the library's slide collection which relates to the studio project, specific photographs and drawings of the project site, and personal image collections stored by individuals for their own reference. The commonly accessible images are basically background material and images collected by the students to document the site, urban context and building typology. The personal images collections are any images (drawings, photographs, published images, CAD images) created or collected by the students for purposes of informing their design thinking. This work relates to the use of precedents and typology in architecture as a point of departure as well as in development of design ideas.
series	CAAD Futures
last changed	1999/04/03 17:58

_id	0e93
authors	Af Klercker, Jonas
year	1989
title	Interactive Animation on the Macintosh II
doi	https://doi.org/10.52842/conf.ecaade.1989.x.a0t
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
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	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	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

_id	6a30
authors	Bonn, Markus
year	1989
title	Modeling Architectural Forms through Replacement Operations
doi	https://doi.org/10.52842/conf.acadia.1989.103
source	New Ideas and Directions for the 1990’s [ACADIA Conference Proceedings] Gainsville (Florida - USA) 27-29 October 1989, pp. 103-130
summary	Replacement operations, where an element at any topological level may be replaced by another element at the same or different topological level, are defined. Their potential as design tools which may be incorporated in a CAD system is investigated and demonstrated through the experimental implementation of two such operations in MARCOS, a Modeling Architectural Compositions System. MARCOS has been written in C. It is highly interactive and runs on an Apple Macintosh IIx. The two operations which have been implemented are the face -> volume and volume -> volume replacements. They were chosen for their potential as generators of architectural forms. Examples of architectural compositions produced through the use of replacement operations are also illustrated.
series	ACADIA
email
last changed	2022/06/07 07:54

_id	44b3
authors	Cajati, Claudio
year	1989
title	Towards A KB System / Image-Databases - Integrated Interface: A Tool For Architectural Education
doi	https://doi.org/10.52842/conf.ecaade.1989.x.e2p
source	CAAD: Education - Research and Practice [eCAADe Conference Proceedings / ISBN 87-982875-2-4] Aarhus (Denmark) 21-23 September 1989, pp. 9.9.1-9.9.7
summary	Focusing on the tasks of university architectural education, a special stress is first laid on the possibility of going beyond some limits of traditional CAAD. as coming out from the recent debate, and on the opportunities offered by knowledge based systems as metadesign supports in architectural domains. Particularly, with regard to image-databases, their importance for explaining and exemplifying the knowledge representation in KB Systems, and their integration via intelligent interface are discussed. At last, some possible uses of the whole as an educational tool in the daily university training are proposed.
keywords	Architectural Education, KB System, Image-database, Interface
series	eCAADe
email
last changed	2022/06/07 07:50

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