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	4f7a
authors	Piegl, L.
year	1985
title	The Sphere as a Rational Bezier Surface
source	[4], 18 p. : ill. October, 1985. Preprint No. 07-13. includes bibliography
summary	A method is developed for the efficient representation of spherical caps by using the rational Bezier scheme of Computer Aided Design. The technique is applied to describe special spherical patches such as the hemi-sphere, an octant of a sphere and the whole sphere. A geometric interpretation of quadratic curves and quadric patches is used in order to obtain an insight into the geometry inherent in the rational Bezier scheme and so to make easier the selection of the spherical patch out of the quadric primitives
keywords	Bezier, curved surfaces, CAD
series	CADline
last changed	2003/06/02 13:58

_id	a65f
authors	Primrose, P.L., Creamer, G.D. and Leonard, R.
year	1985
title	Identifying and Quantifying the Company-Wide Benefits of CAD Within the Structure of a Comprehensive Investment Program
source	Computer Aided Design. Butterworth & Co. Pub., February, 1985. vol. 17: pp. 3-8 : ill. flow charts
summary	This paper discusses the costs and benefits associated with introducing CAD. It is shown that by suitably defining the terms involved, all the so-called 'intangible benefits' can be quantified and used within a rigorous financial evaluation. Because 45 specific factors must be considered if a genuine investment appraisal of CAD is to be performed, a computer program has been specifically written to overcome the difficulties normally associated with the DCF evaluation of major projects. The results from the program demonstrate that not only are the benefits of CAD company-wide, but that when these benefits are quantified, the economic case for CAD is greatly strengthened. The problem of CAD systems being regarded as nothing more than a 'drawing office tool to make draftsmen redundant' is overcome. In particular, the use of the program within a number of major companies reveals that CAD systems not only give a much greater potential return on investment than has been suggested by previous authors, but that the greatest benefits accrue in areas outside the drawing office. This is illustrated by a case study
keywords	CAD, evaluation, business, cost, practice, economics
series	CADline
last changed	2003/06/02 13:58

_id	a619
authors	Bentley, Jon L. and McGeoch, Catherine C.
year	1985
title	Amortized Analyses of Self-Organizing Sequential Search ; Heuristics Programming Techniques and Data Structures
source	communications of the ACM April, 1985. vol. 28: pp. 404-411 : ill. includes bibliography.
summary	Amortization is used to analyze the heuristics in a worst- case sense. The relative merit of the heuristics in this analysis is different in the probabilistic analyses. Experiments show that the behavior of the heuristics on real data is more closely described by the amortized analyses than by the probabilistic analyses
keywords	economics, analysis, search, heuristics
series	CADline
last changed	2003/06/02 13:58

_id	8323
authors	Bentley, Jon L.
year	1985
title	Selection -- Programming Pearls
source	communications of the ACM. November, 1985. vol. 28: pp. 1121- 1127 : ill
summary	This column describes selecting the K- smallest member in a set of N elements. A program for the task is derived and its running time is analyzed
keywords	search, programming, algorithms, techniques
series	CADline
last changed	2003/06/02 13:58

_id	a217
authors	Bhatt, Rajesh V., Fisher, Edward L. and Rasdorf, William J.
year	1985
title	Information Retrieval Architectures For Expert System/DBMS Communication
source	Industrial Engineering Fall Conference Proceedings. December, 1985. pp. 315-320. CADLINE has abstract only
summary	The development of expert systems (ES) for manufacturing problems indicates a need to interact with potentially large amounts of data, much of which resides elsewhere in the ES user's organization. A large amount of information required for planning, design, and control operations can be made available through an existing database management system (DBMS). The need for an ES to access that data is critical. This paper presents two approaches to the development of ES- DBMS interfaces, both query-language based. One approach uses a procedural attachment to the ES language to obtain the required data via the DBMS query language, while the other one uses a separate interface program between the ES and the query language of the DBMS. The procedural attachment is able to acquire data from a DBMS at a faster rate than the interface program; however, the procedural attachment lacks knowledge of the DBMS schema. On the other hand, the interface program sacrifices speed but promotes flexibility, as it has the capability of selecting which DBMS to extract the required data from and allowing augmentation of schema knowledge outside of the ES. A disadvantage of the interface approach is the amount of time involved in data retrieval. The process of writing information to disk files is I/O intensive. This can be quite slow, particularly in PROLOG, the language used to implement the ES. Thus the use of such an interface is only suitable in applications such as design, where extremely fast I/O is not required
keywords	design, engineering, expert systems, information, database, DBMS
series	CADline
last changed	2003/06/02 10:24

_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 13:58

_id	07c6
authors	Kalay, Y.E., Harfmann, A.C. and Swerdloff, L.M.
year	1985
title	ALEX: A Knowledge-Based Architectural Design System
source	ACADIA Workshop ‘85 [ACADIA Conference Proceedings] Tempe (Arizona / USA) 2-3 November 1985, pp. 96-108
doi	https://doi.org/10.52842/conf.acadia.1985.096
summary	A methodology for the development of a knowledge-based computer-aided design system and its experimental application in the domain of single family house design are presented. The methodology involves integrating within a unified design environment, tools and techniques that have been independently developed in various disciplines (including knowledge representation, information management, geometric modeling, human,machine interface, and architectural design). By assuming the role of active design partners, the resulting systems are expected to increase the productivity of designers, improve the quality of their products, and reduce cost and lead time of the design process as a whole. ALEX (Architecture Learning Expert), a particular application of this methodology, is a prototype knowledge-based CAD system in the domain of single family house design. It employs user-interactive, goal directed heuristic search strategies in a solution space that consists of a network of objects. Message-based change propagation techniques, guided by domain-specific knowledge, are used to ensure database integrity and well-formedness. The significance of the methodology and its application is threefold: it furthers our knowledge of the architectural design process, explores the utilization of knowledge engineering methods in design, and serves as a prototype for developing the next generation of computer-aided architectural design systems.
series	ACADIA
email
last changed	2022/06/07 07:52

_id	ea52
authors	Larmore, L.L. and Hirschberg, D. S.
year	1985
title	Efficient Optimal Pagination of Scrolls
source	Communications of the ACM. August 1985. vol. 28: pp. 854-856. includes a short bibliography
summary	Diehr and Faaland developed an algorithm that finds the minimum sum of key length pagination of a scroll of n items, and which uses O(n log n) time solving a problem posed by McCreight. An improved algorithm is given which uses O(n) time
keywords	algorithms, problem solving, search
series	CADline
last changed	2003/06/02 13:58

_id	2699
authors	Piegl, L.
year	1985
title	Recursive Algorithms for the Representation of Parametric Curves and Surfaces
source	Computer Aided Design Butterworth & Co. (publishers) Ltd., June, 1985. vol. 17: pp. 225-230 : ill.
summary	includes a short bibliography. Recursive algorithms for the representation of parametric curves and surfaces are presented which are based upon a geometric property of the de Casteljau algorithm. The algorithms work with triangular and pyramidal arrays that provide an easy handing of the curve and the surface 'in a large' design
keywords	representation, recursion, algorithms, parametrization, curves, curved surfaces
series	CADline
last changed	2003/06/02 13:58

_id	2c11
authors	Ryan, Daniel L.
year	1985
title	Computer-Aided Graphics and Design
source	vii, 398 p. : ill. New York: Marcel Dekker, Inc., 1985. 2nd. ed revised and expanded.: includes bibliography and index
summary	The emphasis is on computer graphic usage in engineering problem solving rather then on creating software. The book provides information on programs, systems and applications in the context of an engineering curriculum
keywords	computer graphics, CAD, education
series	CADline
last changed	2003/06/02 13:58

_id	4316
authors	Bentley, Jon L.
year	1985
title	Associative Arrays -- Programming Pearls
source	communications of the ACM. June, 1985. vol. 28: pp. 570-576 : ill
summary	Anthropological studies have shown that one's language has a profound effect on one's view of the world. This column is about a language feature outside the Algol heritage: associative arrays. The column examines the associative arrays provided by the AWK language
keywords	techniques, programming, algorithms, data structures
series	CADline
last changed	2003/06/02 13:58

_id	8039
authors	Genesereth, Michael R. and Ginsberg, Matthew L.
year	1985
title	Logic Programming
source	Communications of the ACM. September, 1985. vol. 28: pp. 933-941. includes bibliography
summary	Logic programming is programming by description. The programmer describes the application area and lets the program choose specific operations. Logic programs are easier to create and enable machines to explain their results and action
keywords	AI, languages, PROLOG, programming, logic
series	CADline
last changed	2003/06/02 10:24

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