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	d5c8
authors	Angelo, C.V., Bueno, A.P., Ludvig, C., Reis, A.F. and Trezub, D.
year	1999
title	Image and Shape: Two Distinct Approaches
source	III Congreso Iberoamericano de Grafico Digital [SIGRADI Conference Proceedings] Montevideo (Uruguay) September 29th - October 1st 1999, pp. 410-415
summary	This paper is the result of two researches done at the district of Campeche, Florianópolis, by the Grupo PET/ARQ/UFSC/CAPES. Different aspects and conceptual approaches were used to study the spatial attributes of this district located in the Southern part of Santa Catarina Island. The readings and analysis of two researches were based on graphic pistures builded with the use of Corel 7.0 e AutoCadR14. The first research – "Urban Development in the Island of Santa Catarina: Public Space Study"- examined the urban structures of Campeche based on the Spatial Syntax Theory developed by Hillier and Hanson (1984) that relates form and social appropriation of public spaces. The second research – "Topoceptive Characterisation of Campeche: The Image of a Locality in Expansion in the Island of Santa Catarina" -, based on the methodology developed by Kohlsdorf (1996) and also on the visual analysis proposed by Lynch (1960), identified characteristics of this locality with the specific goal of selecting attributes that contributed to the ideas of the place its population held. The paper consists of an initial exercise of linking these two methods in order to test the complementarity of their analytical tools. Exemplifying the analytical procedures undertaken in the two approaches, the readings done - global (of the locality as a whole) and partial (from parts of the settlement) - are presented and compared.
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	44b1
authors	Balas, Egon
year	1984
title	On the Facial Structure of Scheduling Polyhedra
source	49 p., 6 p. of appendix : ill. Pittsburgh, PA: Design Research Center, Carnegie Mellon Univ., December, 1984. includes bibliography
summary	A well-known job shop scheduling problem can be formulated as follows. Given a graph G with node set N and with directed and undirected arcs, find an orientation of the undirected arcs that minimizes the length of a longest path in G. The author treats the problem as a disjunctive program, without recourse to integer variables, and give a partial characterization of the scheduling polyhedron P(N), i.e., the convex hull of feasible schedules. In particular, he derives all the facets inducing inequalities for the scheduling polyhedron P(K) defined on some clique with node set K, and gives a sufficient condition for such inequalities to also induce facets of P(N). One of our results is that any inequality that induces a facet of P(H) for some HCK, also induces a facet of P(K). Another one is a recursive formula for deriving a facet inducing inequality with p positive coefficients from one with p-1 positive coefficients. The author also addresses the constraint identification problem, and gives a procedure for finding an inequality that cuts off a given solution to a subset of the constraints
keywords	polyhedra, graphs, optimization, convex hull
series	CADline
last changed	1999/02/12 15:07

_id	8087
authors	Boehm, Barry W., Penedo, Maria H. and Stuckle, Don E. (et al)
year	1984
title	A Software Development Environment for Improving Productivity
source	IEEE Computer. June, 1984. pp. 30-44 : ill. includes bibliography
summary	The software productivity system (SPS) was developed to support project activities. It involves a set of strategies, including the work environment; the evaluation and procurement of hardware equipment; the provision for immediate access to computing resources through local area networks; the building of an integrated set of tools to support the software development life cycle and all project personnel; and a user support function to transfer new technology. All of these strategies are being accomplished incrementally. The current architecture is VAX-based and uses the Unix operating system, a wideband local network, and a set of software tools. The article describes the steps that led to the creation of the software productivity project and its components and summarized the requirements analyses on which the SPS was based
keywords	productivity, software, hardware, programming
series	CADline
last changed	2003/06/02 10:24

_id	4e4e
authors	Boissonnat, Jean-Daniel
year	1984
title	Geometric Structures for Three- Dimensional Shape Representation
source	ACM Transactions on Graphics. October, 1984. vol. 3: pp. 266-286 : ill. includes bibliography
summary	Different geometric structures are investigated in the context of discrete surface representation. It is shown that minimal representations (i.e., polyhedra) can be provided by a surface-based method using nearest neighbors structures or by a volume-based method using the Delaunay triangulation. Both approaches are compared with respect to various criteria, such as space requirements, computation time, constraints on the distribution of the points, facilities for further calculations, and agreement with the actual shape of the object
keywords	algorithms, polyhedra, curves, curved surfaces, solids, representation, geometric modeling, data structures
series	CADline
last changed	1999/02/12 15:07

_id	8860
authors	Choi, B.K., Barash, M.M. and Anderson, D.C.
year	1984
title	Automatic Recognition of Machined Surfaces from a 3D Solid Model
source	computer Aided Design. March, 1984. vol. 16: pp. 81-86 : ill. includes bibliography
summary	It has been proposed that a direct link between CAD and CAM be provided through a computer-automated process planning system. Described in this paper are algorithmic procedures to identify machined surfaces (i.e., machining requirements) for a workpiece directly from its 3D geometric description. A machined surface is a portion of workpiece that can be generated by a certain mode of metal removal operation. Machined surfaces are algorithmically recognized from a 3D boundary file, and then their 2 1/2D descriptions are obtained in a data structure (format) suitable for an automated process planning system. A simplified boundary file data structure is introduced in order to explain the machined surface recognition procedures
keywords	A machined surface type is defined as a pattern of faces, and a syntactic pattern recognition method is used to find the machined surface from the boundary file
series	CADline
last changed	2003/06/02 13:58

_id	2667
authors	Gonzalez, C.J., Williams, M.H. and Atichison, I.E.
year	1984
title	Evaluation of the Effectiveness of PROLOG for a CAD Application
source	IEEE Computer Graphics and Applications March, 1984. vol. 4: pp. 67-75 : ill. includes bibliography.
summary	A comparison between PROLOG and PASCAL by implementing them on a PDP-11/34 in order to study whether PROLOG could be used as a language for programming CAD applications and if so how could it be used. To obtain a fair perspective Pascal was chosen as a model for programming languages because it is well structured, embodying all the control structures required for structured programming and providing a wide range of data structure like PROLOG
keywords	PROLOG, PASCAL, CAD, applications, programming, languages
series	CADline
last changed	2003/06/02 14:41

_id	653f
authors	Hedelman, Harold
year	1984
title	A Data Flow Approach to Procedural Modeling
source	IEEE Computer Graphics and Applications January, 1984. vol. 4: pp. 16-26 : ill. (some col.). includes bibliography.
summary	Computer graphics tasks generally involve either modeling or viewing. Modeling combines primitive building blocks (polygons, patches, etc.) into data structures that represent entire objects and scenes. To visualize a modeled object, its data structure is input to appropriate viewing routines. While a great deal has been done on modeling and viewing with geometric primitives, little has been published on the use of procedural primitives. A procedural model is a step-by-step guide for constructing a representation of an object or process, i.e., a program. It is also a function, a 'black box' with a set of inputs and outputs. Two questions are especially pertinent to the work presented in this article
keywords	First, what are the advantages of both data flow methods and procedural modeling? Second, how can such models be used in composition? computer graphics, modeling, information, management
series	CADline
last changed	1999/02/12 15:08

_id	40d6
authors	Johnson, Robert E.
year	1984
title	The Integration of Economic Analysis and Computer-based Building Models
source	CIB W-65 Symposium. July, 1984. [19] p. : ill. includes bibliography
summary	Most current methods used to evaluate the economics of building designs are inadequate in that they focus on the evaluation of completed designs and do not assist in the development and creation of designs. They are used after most major design decisions have been made. This paper describes the first year of a two year research project (funded by the National Science Foundation, the U.S. Government) which seeks to integrate economic analysis techniques into design decision-making within the context of an interactive computer-aided architectural and engineering design system. Issues reviewed include the current state of computer software, existing economic analysis models and existing economic analysis software. A conclusion is reached that most economic analysis systems fall into the category of single purpose software and are not adaptable to the wide range of idiosyncratic evaluation models used in real estate, architecture, engineering, construction and building management. Objectives are proposed for a general purpose, interactive cost modeling system that is integrated with a geometric computer-based building model. Initial experiments with a prototype of this system at various stages of the design-construction-use process are discussed. Further development of this system as a research tool for exploring alternative economic modeling procedures is presented
keywords	analysis, evaluation, CAD, architecture, design, methods, economics, integration
series	CADline
last changed	2003/06/02 13:58

_id	e0a3
authors	Johnson, Robert E.
year	1984
title	Computer-Aided Energy Economics for Early Concept Design Analysis
source	Building Economics, International Symposium Proceedings (3rd : Canada). 1984? vol. 3: pp.46-57 : ill. includes bibliography
summary	Decisions that have the greatest impact on energy cost performance are made very early in the design process. The problem is that these early design decisions are rarely tested thoroughly until very late in design. Usually this is due to the difficulties inherent in the use of the more sophisticated analysis procedures. Hourly energy computer simulations are costly to use, often require detailed input preparation, and use large ''main-frame' computers. Easier to use energy evaluation tools such as manual calculations and simplified computer programs do not yield reliable results. This is particularly true when passive solar design solutions are being tested. However, even the sophisticated approaches often have a limited ability to comprehensively model the economic implications of the more accurate energy simulations. This paper is intended to describe efforts at the University of Michigan to develop a more integrated approach to the assessment of energy economics - one that may be used at the earliest stages of concept design. The approach taken has been to concentrate on developing interactive, easy to use computer programs to describe building design proposals. This computer-generated building model is then used to automatically generate the information required to run a large, sophisticated energy analysis program developed by the U.S. Army Corps of Engineers (BLAST). Total life cycle cost analysis is performed either using procedures within BLAST or an 'electronic spreadsheet' system. Perceived deficiencies in the current state of this energy/cost evaluation system are described, and future research directions are presented
keywords	architecture, energy, analysis, CAD, economics, design, methods
series	CADline
last changed	2003/06/02 10:24

_id	4eaf
authors	Kalay, Yehuda E.
year	1984
title	A Database Management Approach to CAD/CAM Systems Integration
source	December, 1984. 13 p. : ill. includes bibliography
summary	Facilitating the communication between different CAD/CAM systems is rapidly becoming an important issue, as more systems reach the market. A solution to the communication problem can be found if it is considered part of the more general problem of managing the complex information associated with the representation of physical artifacts and environments in the memory of computers, thereby accounting for the operators that are used for accessing the data as well as the data itself. Database management systems have provided powerful solutions to information management problems in a variety of disciplines and enjoy a broad and rigorous research foundation. If the techniques, methods and systems that were developed for database management could be utilized for CAD/CAM integration, they would save a considerable duplication of effort, enhance the integrity of the data, and bring to bear the results and advances that have been achieved over a long period of hard work
keywords	CAD, CAM, relational database, integration, architecture
series	CADline
email
last changed	2003/06/02 10:24

_id	caadria2004_k-1
id	caadria2004_k-1
authors	Kalay, Yehuda E.
year	2004
title	CONTEXTUALIZATION AND EMBODIMENT IN CYBERSPACE
source	CAADRIA 2004 [Proceedings of the 9th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 89-7141-648-3] Seoul Korea 28-30 April 2004, pp. 5-14
doi	https://doi.org/10.52842/conf.caadria.2004.005
summary	The introduction of VRML (Virtual Reality Markup Language) in 1994, and other similar web-enabled dynamic modeling software (such as SGI’s Open Inventor and WebSpace), have created a rush to develop on-line 3D virtual environments, with purposes ranging from art, to entertainment, to shopping, to culture and education. Some developers took their cues from the science fiction literature of Gibson (1984), Stephenson (1992), and others. Many were web-extensions to single-player video games. But most were created as a direct extension to our new-found ability to digitally model 3D spaces and to endow them with interactive control and pseudo-inhabitation. Surprisingly, this technologically-driven stampede paid little attention to the core principles of place-making and presence, derived from architecture and cognitive science, respectively: two principles that could and should inform the essence of the virtual place experience and help steer its development. Why are the principles of place-making and presence important for the development of virtual environments? Why not simply be content with our ability to create realistically-looking 3D worlds that we can visit remotely? What could we possibly learn about making these worlds better, had we understood the essence of place and presence? To answer these questions we cannot look at place-making (both physical and virtual) from a 3D space-making point of view alone, because places are not an end unto themselves. Rather, places must be considered a locus of contextualization and embodiment that ground human activities and give them meaning. In doing so, places acquire a meaning of their own, which facilitates, improves, and enriches many aspects of our lives. They provide us with a means to interpret the activities of others and to direct our own actions. Such meaning is comprised of the social and cultural conceptions and behaviors imprinted on the environment by the presence and activities of its inhabitants, who in turn, ‘read’ by them through their own corporeal embodiment of the same environment. This transactional relationship between the physical aspects of an environment, its social/cultural context, and our own embodiment of it, combine to create what is known as a sense of place: the psychological, physical, social, and cultural framework that helps us interpret the world around us, and directs our own behavior in it. In turn, it is our own (as well as others’) presence in that environment that gives it meaning, and shapes its social/cultural character. By understanding the essence of place-ness in general, and in cyberspace in particular, we can create virtual places that can better support Internet-based activities, and make them equal to, in some cases even better than their physical counterparts. One of the activities that stands to benefit most from understanding the concept of cyber-places is learning—an interpersonal activity that requires the co-presence of others (a teacher and/or fellow learners), who can point out the difference between what matters and what does not, and produce an emotional involvement that helps students learn. Thus, while many administrators and educators rush to develop webbased remote learning sites, to leverage the economic advantages of one-tomany learning modalities, these sites deprive learners of the contextualization and embodiment inherent in brick-and-mortar learning institutions, and which are needed to support the activity of learning. Can these qualities be achieved in virtual learning environments? If so, how? These are some of the questions this talk will try to answer by presenting a virtual place-making methodology and its experimental implementation, intended to create a sense of place through contextualization and embodiment in virtual learning environments.
series	CAADRIA
type	normal paper
last changed	2022/06/07 07:52

_id	5c07
authors	Lee, H.-L., Liu, Y.-T., Chen, S.-C., Tang, S.-K. and Huang, C.-P., Huang, C.-H., Chang, Y.-L., Chang, K.-W. and Chen, K.-Y.
year	2002
title	A Comparative study of protocol analysis for - Spatiality of a Text-based Cyberspace
source	Connecting the Real and the Virtual - design e-ducation [20th eCAADe Conference Proceedings / ISBN 0-9541183-0-8] Warsaw (Poland) 18-20 September 2002, pp. 262-266
doi	https://doi.org/10.52842/conf.ecaade.2002.262
summary	Graduate Institute of Architecture, National Chiao Tung University, Hsinchu, 30050, TAIWAN The adaptation of the word cyberspace (Gibson, 1984) following the emergence of the World Wide Web Internet not only succinctly revolutionized the correlation of time and space but also poised to challenge how we view the existing spatial concept. This research tries to use protocol analysis to examine text-based cyberspace, such as bulletin board, chart rooms and so forth, and the objective of this research is to realize the spatiality of cyberspace through the cognitive point of view, and to compare the differences of the definitions and perception ways of spatiality between people with general domain and in design fields. Finally, we validate the existence of cyberspace, where the process not only allows further categorization of spatial elements concluded from the earlier study, but discover that varied backgrounds can affect how a user defines and perceives cyberspace (Strate, 1999).
series	eCAADe
email
last changed	2022/06/07 07:51

_id	812d
authors	Peng, Q. S.
year	1984
title	An Algorithm for Finding the Intersection Lines Between Two B-Spline Surfaces
source	Computer Aided Design July, 1984. vol. 16: pp. 191-196 : ill. includes bibliography.
summary	A divide-and-conquer algorithm is presented for finding all the intersection lines between two B-spline surfaces. Each surface is organized as an n-branch tree. For each intersection line, an initial point is detected after a depth-first search along one tree, i.e. the host tree. Extrapolation methods are then used to trace the entire length of the line, thus the line appears naturally in a continuous form. Efficiency of the algorithm is achieved by employing of an adaptive division strategy and by the careful choice of the representation basis of the patches on both surfaces
keywords	logic, algorithms, B-splines, techniques, divide-and- conquer, intersection, curves, curved surfaces, representation
series	CADline
last changed	2003/06/02 10:24

_id	a166
authors	Van der Heiden, G. H. and Grandjean, E.
year	1984
title	Ergonomic Studies in Computer-Aided Design Ergodesign 84 -- Ergonomics and Design in the Electronic Office:2. Field Studies, Office Furniture and Hardware
source	Behaviour and Information Technology 1984 v.3 n.4 p.341-346
summary	This paper describes the results of an ergonomic survey on interactive graphics workstations for computer-aided design (CAD). A work-sampling study was carried out to characterize the use of keyboard, digitizer tablet and video display. Subjective impressions of CAD software, CAD hardware and health aspects were collected by means of a questionnaire. Working methods and working postures were recorded on videotape. The two most important differences in comparison with other office terminals are: (i) dynamic working methods result in an absence of constrained postures in CAD operators and allow full-body exercise; (ii) CAD operators spend more time (46-68 per cent of working hours) viewing the video display than the average office terminal operator. Some ergonomic recommendations have been deduced for the construction of CAD terminals, as well as for the ergonomic improvement of existing workstations.
series	other
last changed	2002/07/07 16:01

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