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	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	a6f1
authors	Bridges, A.H.
year	1986
title	Any Progress in Systematic Design?
source	Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 5-15
summary	In order to discuss this question it is necessary to reflect awhile on design methods in general. The usual categorization discusses 'generations' of design methods, but Levy (1981) proposes an alternative approach. He identifies five paradigm shifts during the course of the twentieth century which have influenced design methods debate. The first paradigm shift was achieved by 1920, when concern with industrial arts could be seen to have replaced concern with craftsmanship. The second shift, occurring in the early 1930s, resulted in the conception of a design profession. The third happened in the 1950s, when the design methods debate emerged; the fourth took place around 1970 and saw the establishment of 'design research'. Now, in the 1980s, we are going through the fifth paradigm shift, associated with the adoption of a holistic approach to design theory and with the emergence of the concept of design ideology. A major point in Levy's paper was the observation that most of these paradigm shifts were associated with radical social reforms or political upheavals. For instance, we may associate concern about public participation with the 1970s shift and the possible use (or misuse) of knowledge, information and power with the 1980s shift. What has emerged, however, from the work of colleagues engaged since the 1970s in attempting to underpin the practice of design with a coherent body of design theory is increasing evidence of the fundamental nature of a person's engagement with the design activity. This includes evidence of the existence of two distinctive modes of thought, one of which can be described as cognitive modelling and the other which can be described as rational thinking. Cognitive modelling is imagining, seeing in the mind's eye. Rational thinking is linguistic thinking, engaging in a form of internal debate. Cognitive modelling is externalized through action, and through the construction of external representations, especially drawings. Rational thinking is externalized through verbal language and, more formally, through mathematical and scientific notations. Cognitive modelling is analogic, presentational, holistic, integrative and based upon pattern recognition and pattern manipulation. Rational thinking is digital, sequential, analytical, explicatory and based upon categorization and logical inference. There is some relationship between the evidence for two distinctive modes of thought and the evidence of specialization in cerebral hemispheres (Cross, 1984). Design methods have tended to focus upon the rational aspects of design and have, therefore, neglected the cognitive aspects. By recognizing that there are peculiar 'designerly' ways of thinking combining both types of thought process used to perceive, construct and comprehend design representations mentally and then transform them into an external manifestation current work in design theory is promising at last to have some relevance to design practice.
series	CAAD Futures
email
last changed	2003/11/21 15:16

_id	ec87
authors	Buchanan, Bruce G. and Shortliffe, Edward H. (editors)
year	1984
title	Rule- Based Expert Systems : The MYCIN Experiments of the Stanford Heuristic Programming Project
source	xix, 748 p. Reading, Mass.: Addison-Wesley Pub. Co., 1984. includes bibliography: p. 717-738 and subject index
summary	A detailed look at MYCIN, an expert system for diagnosing bacterial infections and prescribing treatment for them. Issues covered include detailed examinations of knowledge acquisition, reasoning, explanation, tutoring, performance evaluation, and human interface
keywords	AI, expert systems, knowledge acquisition, representation, reasoning, user interface
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	ddss2008-02
id	ddss2008-02
authors	Gonçalves Barros, Ana Paula Borba; Valério Augusto Soares de Medeiros, Paulo Cesar Marques da Silva and Frederico de Holanda
year	2008
title	Road hierarchy and speed limits in Brasília/Brazil
source	H.J.P. Timmermans, B. de Vries (eds.) 2008, Design & Decision Support Systems in Architecture and Urban Planning, ISBN 978-90-6814-173-3, University of Technology Eindhoven, published on CD
summary	This paper aims at exploring the theory of the Social Logic of Space or Space Syntax as a strategy to define parameters of road hierarchy and, if this use is found possible, to establish maximum speeds allowed in the transportation system of Brasília, the capital city of Brazil. Space Syntax – a theory developed by Hillier and Hanson (1984) – incorporates the space topological relationships, considering the city shape and its influence in the distribution of movements within the space. The theory’s axiality method – used in this study – analyses the accessibility to the street network relationships, by means of the system’s integration, one of its explicative variables in terms of copresence, or potential co-existence between the through-passing movements of people and vehicles (Hillier, 1996). One of the most used concepts of Space Syntax in the integration, which represents the potential flow generation in the road axes and is the focus of this paper. It is believed there is a strong correlation between urban space-form configuration and the way flows and movements are distributed in the city, considering nodes articulations and the topological location of segments and streets in the grid (Holanda, 2002; Medeiros, 2006). For urban transportation studies, traffic-related problems are often investigated and simulated by assignment models – well-established in traffic studies. Space Syntax, on the other hand, is a tool with few applications in transport (Barros, 2006; Barros et al, 2007), an area where configurational models are considered to present inconsistencies when used in transportation (cf. Cybis et al, 1996). Although this is true in some cases, it should not be generalized. Therefore, in order to simulate and evaluate Space Syntax for the traffic approach, the city of Brasília was used as a case study. The reason for the choice was the fact the capital of Brazil is a masterpiece of modern urban design and presents a unique urban layout based on an axial grid system considering several express and arterial long roads, each one with 3 to 6 lanes,
keywords	Space syntax, road hierarchy
series	DDSS
last changed	2008/09/01 17:06

_id	avocaad_2001_15
id	avocaad_2001_15
authors	Henri Achten, Jos van Leeuwen
year	2001
title	Scheming and Plotting your Way into Architectural Complexity
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	The problem of complexity underlies all design problems. With the advent of CAD however, our ability to truly represent complexity has increased considerably. Following the four waves of design methodology as distinguished by Cross (1984), we see changing architectural design attitudes with respect to complexity. Rather than viewing it as problematic issue, designers such as Koolhaas, van Berkel, Lynn, and Franke embrace complexity and make it a focus in their design work. The computer is an indispensable instrument in this approach. The paper discusses the current state of the art in architectural design positions on complexity and CAAD, and reflects in particular on the role of design representations in this discussion. It is advanced that a number of recent developments are based on an intensified use of design representations such as schema’s, diagrams, and interactive modelling techniques. Within the field of possibilities in this field, the authors discuss Feature-Based Modelling (FBM) as a formalism to represent knowledge of the design. It is demonstrated how the FBM approach can be used to describe graphic representations as used in design, and how other levels and kinds of design knowledge can be incorporated, in particular the less definite qualitative information in the early design phase. The discussion section concludes with an extrapolation of the current role of design representation in the design process, and advances a few positions on the advantage and disadvantage of this role in architectural design.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	f59d
authors	Koelbl, R., Bruntsch, St. and Knoflacher, H.
year	2003
title	Perspective Vienna – A Comparison of Planning Scenarios and Real Development
source	CORP 2003, Vienna University of Technology, 25.2.-28.2.2003 [Proceedings on CD-Rom]
summary	With the suspension of national boarders in unions of nations, cities and their regions gain in significance for the economic, social and cultural development. This is particularly valid for Vienna, which lies close to the eastern boarder of the European Union, which should fall with the enlargement of EU in the near future. Of prominent importance is therefore to obtain a comprehensive understanding between proposed and defined aims for an urban development, the related measures and their extent ofimplementations and their actual or real effects. This paper attempts to give a strategic analysis of the Viennese urban and traffic development programs, from 1962, 1972, 1984 and 1994, on the one hand, and the data analysis of the statistical year books beginning from 1960 until 2000, on the other. The results show that adjustments have been made not only in response to certain trends, but also to a change of philosophy of urban development. It can be seen that certain assumptions of, for example, economic and transport measures can have the opposite outcome in relation to the intended objectives. Hence, one main question remains to beanswered: How should Vienna deal with the challenges ahead, to secure and foster a sustainable development under such circumstances on a long-term basis. In this respect, some measures are given, which should make it possible to overcome successfully these challenges.
series	other
email
last changed	2003/03/11 20:39

_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
doi	https://doi.org/10.52842/conf.ecaade.2002.262
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
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	86c4
authors	Shaviv, Edna
year	1984
title	Climate and Building Design - Tradition, Research and Design Tools
source	Energy and Buildings. 1984. vol. 7: pp.55-69 : ill. tables. includes bibliography
summary	Important design parameters that influence the building thermal behavior and in particular natural cooling are discussed. Among these design parameters are: ventilation, evaporation, proper shading, orientation of the building and its proportions with respect to the orientation, the color of the building's envelope and its conductivity, the thermal mass of the building, night radiation to the sky and the stack effect. The latter is the katabatic and anabatic cooling. Different design tools aimed at the study of the influence of the climatological parameters on the form andÔ h)000*°° ÔŒ characteristics of buildings were developed in recent years. These tools help architects in designing houses with improved indoor thermal conditions without mechanical means, or with minimum energy consumptions. Several design tools, as well as design considerations and traditional constructions, are presented
keywords	Emphasis is placed on computer-aided design tools
series	CADline
email
last changed	2003/05/17 10:20

_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

_id	0589
authors	Weghorst, H., Hooper, G., and Greenberg, D.
year	1984
title	Improved Computational Methods for Ray Tracing
source	ACM Trans. on Graphics, vol. 3, no. 1, pp. 52-69, Jan. 1984
summary	This paper describes algorithmic procedures that have been implemented to reduce the computational expense of producing ray-traced images. The selection of bounding volumes is examined to reduce the computational cost of the ray-intersection test. The use of object coherence, which relies on a hierarchical description of the environment, is then presented. Finally, since the building of the ray-intersection trees is such a large portion of the computation, a method using image coherence is described. This visible-surface preprocessing method, which is dependent upon the creation of an "item buffer," takes advantage of a priori image information. Examples that indicate the efficiency of these techniques for a variety of representative environments are presented.
series	other
last changed	2003/04/23 15:50

_id	af76
authors	Wong, Waycal C.H. and Will, Barry F.
year	1996
title	An Analysis of Using a Digital 3D Sundial as a Design and Decision Support Tool
doi	https://doi.org/10.52842/conf.caadria.1996.131
source	CAADRIA ‘96 [Proceedings of The First Conference on Computer Aided Architectural Design Research in Asia / ISBN 9627-75-703-9] Hong Kong (Hong Kong) 25-27 April 1996, pp. 131-141
summary	The rapid speed of computer development brings new technologies, and these advances require innovative investigations to apply them optimally in the field of architecture. Burkett (1984) demonstrated that computer graphics can ‘provide an excellent opportunity for exploring solar issues in building redesign’. With one of the latest computer technologies, the "hyper-model” environment, this research investigates how to environment can become an aid in the design and decision support area. The research first reviews the communication between the architect and the client as described by Salisbury (1990). The review indicates that an interactive 3D hypermedia paradigm, with quick response, fast data manipulation and 3D visualization, offers a better communication media between the architect and the client. This research applies the "hyper-model” environment to design and develop a new methodology in collecting, analyzing, and presenting solar data. It also endeavors to show the possibilities of using the environment in design process.
series	CAADRIA
last changed	2022/06/07 07:57

_id	409c
authors	Akin, Omer, Flemming, Ulrich and Woodbury, Robert F.
year	1984
title	Development of Computer Systems for Use in Architectural Education
source	1984. ii, 47 p. includes bibliography
summary	Computers have not been used in education in a way that fosters intellectual development of alternate approaches to design. Sufficient theory exists to use computing devices to support other potentially fruitful approaches to design. A proposal is made for the development of a computer system for architectural education which is built upon a particular model for design, that of rational decision making. Within the framework provided by the model, a series of courseware development projects are proposed which together with hardware acquisitions constitute a comprehensive computer system for architectural education
keywords	architecture, education, design, decision making
series	CADline
email
last changed	2003/06/02 13:58

_id	sigradi2015_9.347
id	sigradi2015_9.347
authors	Andrade, Eduardo; Orellana, Nicolas; Mesa, Javiera; Felmer, Patricio
year	2015
title	Spatial Configuration and Sociaty. Comparison between the street market Tristan Matta and Tirso de Molina Market
source	SIGRADI 2015 [Proceedings of the 19th Conference of the Iberoamerican Society of Digital Graphics - vol. 2 - ISBN: 978-85-8039-133-6] Florianópolis, SC, Brasil 23-27 November 2015, pp. 481-485.
summary	This research aims to clarify how certain visual and accessibility patterns, in buildings and urban environments, are related to social activities that take place in them. The study, based on the theory of space syntax (Hillier & Hanson 1984; Hillier, 1996), seeks to recognize patterns of behavior, both individual and aggregate. The case studies are Tirso de Molina Market and the free street market Tristan Matta, both in Santiago de Chile.
keywords	pace Syntax, Visibilidad, Accesibilidad, Conectividad, Comportamiento
series	SIGRADI
email
last changed	2016/03/10 09:47

_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	4685
authors	Barsky, Brian A.
year	1984
title	A Description and Evaluation of Various 3-D Models
source	IEEE Computer Graphics and Applications. January, 1984. vol. 4: pp. 38-52 : ill. Includes bibliography
summary	The use of parametric curves and surfaces for object modeling in computer graphics is becoming increasingly popular. There is sometimes, however, a reluctance to use them because it seems that the added power they give is more than offset by the complexity of their formulations and their computations. The purpose of this article is to clarify their meanings and uses and show how much they have in common behind the diversity of their formulations. The author discusses the properties and benefits of using the parametric Hermite, Coons, Bezier, B-spline, and Beta-spline curve and surface formulations
keywords	Hermite, Coons, curved surfaces, Bezier, curves, B- splines, computational geometry, computer graphics
series	CADline
last changed	2003/06/02 10:24

_id	c9c1
authors	Basili, Victor R. and Perricone, Barry T.
year	1984
title	Software Errors and Complexity : An Empirical Investigation
source	communications of the ACM. January, 1984. vol. 27: pp. 42-52 : ill. includes bibliography
summary	The relationships between the frequency and distribution of errors during software development, the maintenance of the developed software, and a the influence of a variety of environmental factors on software development were analyzed. These factors include the complexity of the software, the developer's experience with the application, and the reuse of existing design and code. Such relationships can not only provide an insight into the characteristics of computer software development and the effects that the environment can have on the product, but also improve its reliability and quality. The study is based on data derived from a medium- scale software development project
keywords	software, engineering, programming, reliability
series	CADline
last changed	2003/06/02 13:58

_id	ecaadesigradi2019_449
id	ecaadesigradi2019_449
authors	Becerra Santacruz, Axel
year	2019
title	The Architecture of ScarCity Game - The craft and the digital as an alternative design process
doi	https://doi.org/10.52842/conf.ecaade.2019.3.045
source	Sousa, JP, Xavier, JP and Castro Henriques, G (eds.), Architecture in the Age of the 4th Industrial Revolution - Proceedings of the 37th eCAADe and 23rd SIGraDi Conference - Volume 3, University of Porto, Porto, Portugal, 11-13 September 2019, pp. 45-52
summary	The Architecture of ScarCity Game is a board game used as a pedagogical tool that challenges architecture students by involving them in a series of experimental design sessions to understand the design process of scarcity and the actual relation between the craft and the digital. This means "pragmatic delivery processes and material constraints, where the exchange between the artisan of handmade, representing local skills and technology of the digitally conceived is explored" (Huang 2013). The game focuses on understanding the different variables of the crafted design process of traditional communities under conditions of scarcity (Michel and Bevan 1992). This requires first analyzing the spatial environmental model of interaction, available human and natural resources, and the dynamic relationship of these variables in a digital era. In the first stage (Pre-Agency), the game set the concept of the craft by limiting students design exploration from a minimum possible perspective developing locally available resources and techniques. The key elements of the design process of traditional knowledge communities have to be identified (Preez 1984). In other words, this stage is driven by limited resources + chance + contingency. In the second stage (Post-Agency) students taking the architects´ role within this communities, have to speculate and explore the interface between the craft (local knowledge and low technological tools), and the digital represented by computation data, new technologies available and construction. This means the introduction of strategy + opportunity + chance as part of the design process. In this sense, the game has a life beyond its mechanics. This other life challenges the participants to exploit the possibilities of breaking the actual boundaries of design. The result is a tool to challenge conventional methods of teaching and leaning controlling a prescribed design process. It confronts the rules that professionals in this field take for granted. The game simulates a 'fake' reality by exploring in different ways with surveyed information. As a result, participants do not have anything 'real' to lose. Instead, they have all the freedom to innovate and be creative.
keywords	Global south, scarcity, low tech, digital-craft, design process and innovation by challenge.
series	eCAADeSIGraDi
email
last changed	2022/06/07 07:54

_id	6050
authors	Bentley, Jon L.
year	1984
title	Algorithm Design Techniques -- Programming Pearls
source	communications of the ACM. September, 1984. vol. 27: pp. 865-871 : ill
summary	The problem arose in one-dimensional pattern recognition: The input is a vector X of N real numbers; the output is the maximum sum found in any contiguous subvector of the input. The problem is when some of the numbers are negative. This column is built around that problem with an emphasis on the algorithms that solve it and the techniques used to design them
keywords	techniques, programming, algorithms, pattern recognition
series	CADline
last changed	2003/06/02 13:58

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