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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Hits 81 to 100 of 143

_id 68aa
authors Greenberg, Donald P.
year 1986
title Computer Graphics and Visualization
source Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 63-67
summary The field of computer graphics has made enormous progress during the past decade. It is rapidly approaching the time when we will be able to create images of such realism that it will be possible to 'walk through' nonexistent spaces and to evaluate their aesthetic quality based on the simulations. In this chapter we wish to document the historical development of computer graphics image creation and describe some techniques which are currently being developed. We will try to explain some pilot projects that we are just beginning to undertake at the Program of Computer Graphics and the Center for Theory and Simulation in Science and Engineering at Cornell University.
series CAAD Futures
last changed 1999/04/03 15:58

_id ce52
authors Abram, Greg, Weslover, Lee and Whitted, Turner
year 1985
title Efficient Alias-Free Rendering using Bit-masks and Look-up Tables
source SIGGRAPH '85 Conference Proceedings. July, 1985. vol. 19 ; no. 3: pp. 53-59 : ill. (some col.). includes bibliography
summary The authors demonstrate methods of rendering alias-free synthetic images using a precomputed convolution integral. The method is based on the observation that a visible polygon fragment's contribution to an image is solely a function of its position and shape, and that within a reasonable level of accuracy, a limited number of shapes represent the majority of cases encountered in images commonly rendered. The basic technique has been applied to several different rendering algorithms. A version of the newly non-uniform sampling technique implemented in the same program but with different tables values was introduced
keywords algorithms, computer graphics, anti-aliasing
series CADline
last changed 2003/06/02 11:58

_id cc15
authors Ansaldi, Silvia, De Floriani, Leila and Falcidieno, Bianca
year 1985
title Geometric Modeling of Solid Objects by Using a Face Adjacency Graph Representation
source SIGGRAPH '85 Conference Proceedings. July, 1985. vol. 19 ; no. 3: pp. 131-139 : ill. includes bibliography
summary A relational graph structure based on a boundary representation of solid objects is described. In this structure, called Face Adjacency Graph, nodes represent object faces, whereas edges and vertices are encoded into arcs and hyperarcs. Based on the face adjacency graph, the authors define a set of primitive face-oriented Euler operators, and a set of macro operators for face manipulation, which allow a compact definition and an efficient updating of solid objects. The authors briefly describe a hierarchical graph structure based on the face adjacency graph, which provides a representation of an object at different levels of detail. Thus it is consistent with the stepwise refinement process through which the object description is produced
keywords geometric modeling, graphs, objects, representation, data structures,B-rep, solid modeling, Euler operators
series CADline
last changed 2003/06/02 08:24

_id 8ae8
authors Ayala, D., P. Brunet and Juan (et al)
year 1985
title Object Representation by Means of Nominimal Division Quadtrees and Octrees
source ACM Transactions on Graphics. January, 1985. vol. 4: pp. 41-59 : ill. includes bibliography
summary Quadtree representation of two-dimensional objects is performed with a tree that describes the recursive subdivision of the more complex parts of a picture until the desired resolution is reached. At the end, all the leaves of the tree are square cells that lie completely inside or outside the object. There are two great disadvantages in the use of quadtrees as a representation scheme for objects in geometric modeling system: The amount of memory required for polygonal objects is too great, and it is difficult to recompute the boundary representation of the object after some Boolean operations have been performed. In the present paper a new class of quadtrees, in which nodes may contain zero or one edge, is introduced. By using these quadtrees, storage requirements are reduced and it is possible to obtain the exact backward conversion to boundary representation. Algorithms for the generation of the quadtree, boolean operation, and recomputation of the boundary representation are presented, and their complexities in time and space are discussed. Three- dimensional algorithms working on octrees are also presented. Their use in the geometric modeling of three-dimensional polyhedral objects is discussed
keywords geometric modeling, algorithms, octree, quadtree, curves, curved surfaces, boolean operations
series CADline
last changed 2003/06/02 11:58

_id c89d
authors Bancroft, Pamela J.
year 1987
title The Integration of Computing into Architectural Education Through Computer Literate Faculty
source Integrating Computers into the Architectural Curriculum [ACADIA Conference Proceedings] Raleigh (North Carolina / USA) 1987, pp. 109-120
summary This paper discusses the apparent correlation between faculty computer literacy and the success of integrating computing into architectural education. Relevant questions of a 1985 national survey which was conducted to study the historical development of faculty computer utilization are analyzed and interpreted. The survey results are then used as the basis for a series of recommendations given for increasing computer literacy among faculty in architectural schools, thus increasing the integration of computing.

series ACADIA
last changed 2003/11/21 14:16

_id c50a
authors Bartschi, Martin
year 1985
title An Overview of Information Retrieval Subjects
source IEEE Computer. May, 1985. vol. 18: pp. 67-84 : ill. includes bibliography
summary The aim of an information retrieval system is to find information items relevant to an information need. As relevance is a kind of similarity relation between the concepts represented by the information item and those represented by the formulation of the information need, it is not astonishing to discover that the class of possible query forms -formulations of the information needs - is the same as the class of possible representations of information items. This article overviews current research problems in information structure and query evaluation
keywords database, information, queries, systems
series CADline
last changed 1999/02/12 14:07

_id 2d64
authors Batori, D.S. and Kim, W.
year 1985
title Modeling Concepts for VLSI CAD Objects
source ACM Transactions on Database Systems 10 No. 3 - pp. 322-346
summary VLSI CAD applications deal with design objects that have an interface description and an implementation description. Versions of design objects have a common interface but differ in their implementations. A molecular object is a modeling construct which enables a database entity to be represented by two sets of heterogeneous records, one set describes the object's interface and the other describes its implementation. Thus a reasonable starting point for modeling design objects is to begin with the concept of molecular objects. In this paper, we identify modeling concepts that are fundamental to capturing the semantics of VLSI CAD design objects and versions in terms of molecular objects. A provisional set of user operations on design objects, consistent with these modeling concepts, is also defined. The modeling framework that we present has been found useful for investigating physical storage techniques and change notification problems in version control. REFERENCES
series journal paper
last changed 2003/11/21 14:16

_id ddss9409
id ddss9409
authors Beekman, Solange and Rikhof, Herman G.A.
year 1994
title Strategic Urban Planning in the Netherlands
source Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary Since the mid-1980s, several Dutch towns have initiated many urban planning and design activities for their existing area. This represented a shift in that previous urban planning projects typicallyconcerned expansion in the outskirts of the city, or urban renewal. The complex and expensive renovation of the existing housing stock rarely allowed a deep interest in urban design. Since 1985, attention shifted from the housing stock to the city as a whole. Furthermore, public andprivate actors increasingly become involved in the planning process. It became clear that a more comprehensive plan for the whole existing town or region was needed. Conventional planning instruments were considered ill-suited for this new challenge. The paper discusses promising attempts of various urban planning instruments to get a stronger but also more flexible hold on thetransformation of the urban planning area in the Netherlands. These new planning instruments have three common characteristics: (i) they give special attention to the different levels of urban management needed for different urban areas, (ii) these strategic plans provide an integral view on the urban developments, and (iii) these plans introduce a new strategy to deal with both private initiatives to transform urban sites and monitor wishes, proposals, etc. from inhabitants in the neighbourhoods. A comparative analyses of several cities indicates, however, that, in addition to these common characteristics, major differences between their strategic plans exist depending upon their historic patrimonium, economic status and planning tradition.
series DDSS
email h.g.a.rikhof@bwk.tue.nl
last changed 2003/08/07 14:36

_id c3b1
authors Berry, R. E. and Meekings, B.A.E.
year 1985
title A Style Analysis of C Programs
source communications of the ACM. January, 1985. vol. 29: pp. 80-88
summary Since programming is considered by many to be learned by experience and example, rather than instruction, the authors analyzed code produced by professional programmers. C programs comprising the UNIX operating system and its utilities were chosen. The authors have arbitrarily selected a large body of professionally produced code and subjected it to 'stylish analysis.' Each program was given a percentage 'score' for style that consists of contributions in varying degrees from various program features like module length, line length, reserved words etc
keywords languages, C, programming, techniques
series CADline
last changed 2003/06/02 11:58

_id c088
authors Biermann, Alan W., Rodman, Robert D. and Rubin, David C. (et al)
year 1985
title Natural Language with Discrete Speech as a Mode for Human- to-Machine Communication
source Communications of the ACM June, 1985. vol. 28: pp. 628-636 : ill. includes bibliography.
summary A voice interactive natural language system, which allows users to solve problems with spoken English commands, has been constructed. The system utilizes a commercially available discrete speech recognizer which requires that each word be followed by approximately a 300 millisecond pause. In a test of the system, subjects were able to learn its use after about two hours of training. The system correctly processed about 77 percent of the over 6000 input sentences spoken in problem-solving sessions. Subjects spoke at the rate of about three sentences per minute and were able to effectively use the system to complete the given tasks. Subjects found the system relatively easy to learn and use, and gave a generally positive report of their experience
keywords user interface, natural languages, speech recognition, AI
series CADline
last changed 2003/06/02 11:58

_id 8a90
authors Buchmann, Alejandro P. and Gerzso, Miguel J.
year 1985
title Handling Heterogeneously Formatted Data in an Object Oriented Database Environment
source NCGA - National Computer Graphics Association Conference Proceedings. 1985. vol. 3: pp. 645-655 : ill. includes bibliography
summary The paper discussed the problems associated with handling heterogeneously formatted data and the interfacing of the subsystems of a CAD system that intervene in the handling of these data: the database management system, the graphic display system and application programs. Object-oriented languages with message passing capabilities were offered as a feasible solution which was illustrated through examples in the language TM
keywords CAD, systems, languages, computer graphics, database
series CADline
last changed 2003/06/02 08:24

_id ca88
authors Buzbee, B.L. and Sharp, D.H.
year 1985
title Perspectives on Supercomputing
source Science. February, 1985. vol. 227: pp. 591-597 : ill. includes bibliography
summary This article provides a brief look at the current status of supercomputers and supercomputing in the United States. It addresses a variety of applications of supercomputers and the characteristics of a large modern supercomputing facility, the radical changes in the design of supercomputers that are impending, and the conditions that are necessary for a conducive climate for the further development and application of supercomputers
keywords parallel processing, hardware, business
series CADline
last changed 2003/06/02 11:58

_id e4bc
authors Cass, Christopher
year 1985
title Creativity and Automation: Thoughtful Training Guarantees Room for Both
source computer Graphics World. November, 1985. vol. 8: pp. 33-34, 36 : col. ill
summary To avoid losing and ignoring the conceptual and functional importance of traditional design and modeling skills, firms should control the use of new technology in such a way that traditional organizational benefits are retained. Problems and suggestions were presented for the training programs given to those who already possess design skills in order to enhance creativity
keywords creativity, training, automation, practice
series CADline
last changed 1999/02/12 14:07

_id 2a27
authors Christiansson, Per
year 1985
title Integrated Systems Results of the W78 Survey
source CIB W78 Integrated CAD Symposium. September, 1985. 12 p
summary The International Council for Building research studies and documentation (CIB) working commission W78 Integrated Computer-Aided Design conducted a study to develop a catalog of integrated computer-aided design systems addressing development of integrated computer-aided building design systems. The study encompassed two phases: Survey of existing systems and on-going development projects and summary of result. This paper includes a reproduced questionnaire and results
keywords integration, systems, building, CAD
series CADline
last changed 1999/02/12 14:07

_id 25de
authors Ervamaa, Pekka
year 1993
title Integrated Visualization
source Endoscopy as a Tool in Architecture [Proceedings of the 1st European Architectural Endoscopy Association Conference / ISBN 951-722-069-3] Tampere (Finland), 25-28 August 1993, pp. 157-160
summary The Video and Multimedia studio at VTT, Technical Research Centre of Finland, started with endoscopy photography of scale models. Video recordings has been made since 1985 and computer graphic since 1989. New visualization methods and techniques has been taken into use as a part of research projects, but mainly we have been working with clients commissions only. Theoretical background for the visualizations is strong. Research professor Hilkka Lehtonen has published several papers concerning the theory of visualization in urban planning. This studio is the only professional level video unit at Technical Research Centre, which is a large polytechnic research unit. We produce video tapes for many other research units. All kind of integrated methods of visualization are useful in these video productions, too.
keywords Architectural Endoscopy
series EAEA
email Pekka.Ervamaa@vtt.fi
more http://info.tuwien.ac.at/eaea/
last changed 2005/09/09 08:43

_id 29ff
authors Farouki, Rida T. and Hinds, John K.
year 1985
title A Hierarchy of Geometric Forms
source IEEE Computer Graphics and Applications. May, 1985. vol. 5: pp. 51-78 : ill. includes bibliography
summary This article describes a unified approach to geometric modeling based on the mathematics of parametric polynomial functions. Such a unified scheme for geometric representation and computation provides a natural base for a geometric modeler of considerable versatility and robustness
keywords geometric modeling, parametrization, representation, curves, curved surfaces, B-splines
series CADline
last changed 2003/06/02 11:58

_id ga0024
id ga0024
authors Ferrara, Paolo and Foglia, Gabriele
year 2000
title TEAnO or the computer assisted generation of manufactured aesthetic goods seen as a constrained flux of technological unconsciousness
source International Conference on Generative Art
summary TEAnO (Telematica, Elettronica, Analisi nell'Opificio) was born in Florence, in 1991, at the age of 8, being the direct consequence of years of attempts by a group of computer science professionals to use the digital computers technology to find a sustainable match among creation, generation (or re-creation) and recreation, the three basic keywords underlying the concept of “Littérature potentielle” deployed by Oulipo in France and Oplepo in Italy (see “La Littérature potentielle (Créations Re-créations Récréations) published in France by Gallimard in 1973). During the last decade, TEAnO has been involving in the generation of “artistic goods” in aesthetic domains such as literature, music, theatre and painting. In all those artefacts in the computer plays a twofold role: it is often a tool to generate the good (e.g. an editor to compose palindrome sonnets of to generate antonymic music) and, sometimes it is the medium that makes the fruition of the good possible (e.g. the generator of passages of definition literature). In that sense such artefacts can actually be considered as “manufactured” goods. A great part of such creation and re-creation work has been based upon a rather small number of generation constraints borrowed from Oulipo, deeply stressed by the use of the digital computer massive combinatory power: S+n, edge extraction, phonetic manipulation, re-writing of well known masterpieces, random generation of plots, etc. Regardless this apparently simple underlying generation mechanisms, the systematic use of computer based tools, as weel the analysis of the produced results, has been the way to highlight two findings which can significantly affect the practice of computer based generation of aesthetic goods: ? the deep structure of an aesthetic work persists even through the more “desctructive” manipulations, (such as the antonymic transformation of the melody and lyrics of a music work) and become evident as a sort of profound, earliest and distinctive constraint; ? the intensive flux of computer generated “raw” material seems to confirm and to bring to our attention the existence of what Walter Benjamin indicated as the different way in which the nature talk to a camera and to our eye, and Franco Vaccari called “technological unconsciousness”. Essential references R. Campagnoli, Y. Hersant, “Oulipo La letteratura potenziale (Creazioni Ri-creazioni Ricreazioni)”, 1985 R. Campagnoli “Oupiliana”, 1995 TEAnO, “Quaderno n. 2 Antologia di letteratura potenziale”, 1996 W. Benjiamin, “Das Kunstwerk im Zeitalter seiner technischen Reprodizierbarkeit”, 1936 F. Vaccari, “Fotografia e inconscio tecnologico”, 1994
series other
more http://www.generativeart.com/
last changed 2003/08/07 15:25

_id 6947
authors Foxley, Eric, McGettrick, A. D. and van Leeuwen, J. (consulting editors)
year 1985
title UNIX for Super Users
source xiv, 213 p. Wokingham, England: Addison-Wesley Pub. Co., 1985. includes index -- (International Computer Science Series)
summary For the person responsible for managing a UNIX system. A description of key management functions like : Bringing up the system and taking it down, creation of new login names, maintenance of file-store security, monitoring user resource usage, and machine performance considerations. Outlines of shell scripts and C programs for various system management function are given. All major versions, at the time, of UNIX and its derivatives are covered
keywords UNIX, operating systems
series CADline
last changed 2003/06/02 11:58

_id e191
authors Fuchs, Henry, Goldfeather, Jack and Hultquist, Jeff P.
year 1985
title Fast Spheres, Shadows, Textures, Transparencies, and Image Enhancements in Pixel-Planes
source SIGGRAPH '85 Conference Proceedings. July, 1985. 1985. vol. 19 ; no. 3: pp. 111-120 : ill. includes bibliography
summary Pixel-planes is a logic-enhanced memory system for raster graphics and imaging. Although each pixel-memory is enhanced with a one-bit ALU, the system's real power comes from a tree of one-bit address that can evaluate linear expressions Ax + By + C for every pixel (x,y) simultaneously, as fast as the ALUs and the memory circuits can accept the results. The development of a variety of algorithms that exploit this fast linear expression evaluation capability has started. The paper reports some of those results. Illustrated in this paper is a sample image from a small working prototype of the Pixel- planes hardware and a variety of images from simulations of a full-scale system. Timing estimates indicate that 30,000 smooth shaded triangles can be generated per second, or 21, 000 smooth-shaded and shadowed triangles can be generated per second, or over 25,000 shaded spheres can be generated per second. Image-enhancement by adaptive histogram equalization can be performed within 4 seconds on a 512 x 512 image
keywords shadowing, image processing, algorithms, polygons, clipping, computer graphics, technology, hardware
series CADline
last changed 2003/06/02 08:24

_id 6735
authors Gardner, Howard
year 1985
title The Mind's New Science: A History of the Cognitive Revolution
source xv, 423 p. New York: Basic Books, 1985. includes bibliography: p.393-408 and indexes
summary An interdisciplinary effort of cognitive science through conceptual tools to solve the problem of the nature of knowledge and how it is represented in the mind
keywords AI, cognition, research, science, psychology
series CADline
last changed 1999/02/12 14:08

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