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	ecaade2011_149
id	ecaade2011_149
authors	Popov, Nikolay
year	2011
title	Generative sub-division morphogenesis with Cellular Automata and Agent-Based Modelling
doi	https://doi.org/10.52842/conf.ecaade.2011.166
source	RESPECTING FRAGILE PLACES [29th eCAADe Conference Proceedings / ISBN 978-9-4912070-1-3], University of Ljubljana, Faculty of Architecture (Slovenia) 21-24 September 2011, pp.166-174
summary	This paper reports on some recent research carried out to develop computational generative urban design system that can be used as an alternative approach to master planning. The focus of the investigation is an 11 ha site located in the South-East edge of Auckland, New Zealand. The urban (or sub-urban) morphology is modelled as cellular automaton based on Hillier’s (1984) x-y syntax in order to resemble the morphology of the existing village. An agent based system based on Reynolds’ (1987) flocking algorithm evolves synchronously with the automaton and tests its ecological fitness. The emergent pattern of development therefore results from the mutual co-adaption of the cellular automaton and the agent based model. The outcomes are variety of spatial morphologies that connects well with adjacent existing village and at the same time take into account landscape and ecological peculiarities of the site.
wos	WOS:000335665500019
keywords	Generative urban design; structural coupling; cellular automata; agent based modelling
series	eCAADe
email
last changed	2022/05/01 23:21

_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	c1ae
authors	Gulliehsen, Eric and Chang, Ernest
year	1984
title	An Expert System for Generative Architectural Design
source	December, 1984. pp. 253-267. includes bibliography
summary	The mathematician-architect Christopher Alexander has devised a scientific theory of architectural design. He believes that all existing architectural entities can be described as interacting patterns, all possible relationships of which are governed by generative rules. These form a pattern language capable of generating design forms appropriate to a given environmental context. The complexity of interaction among these rules leads to difficulties in their representation by conventional methods. This paper presents a computer-based expert system which implements Alexander's design methodology
keywords	synthesis, expert systems, CAD, patterns, design, methods, architecture, theory
series	CADline
last changed	2003/06/02 10:24

_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	ac8b
authors	Mitchell, W.
year	1984
title	CAD Technology, Its Effects on Practice and the Response of Education - an Overview
doi	https://doi.org/10.52842/conf.ecaade.1984.x.b3c
source	The Third European Conference on CAD in the Education of Architecture [eCAADe Conference Proceedings] Helsinki (Finnland) 20-22 September 1984.
summary	Related with the evolution of hardware there also is an evolution of CAD techniques. The very first CAD/CAM packages were developed on mainframes. They moved into practice when 16-bit minicomputers became available. The packages mainly were production drafting applications. The 32-bit super minicomputers give wider possibilities, but at the same time some software problems arise, namely the complexity of CAD- databases and the development and maintenance cost of large programs. With VLSI the distribution of intelligence becomes possible, the enthousiasm for CAD increases, but still the gap between available hardware and high quality software, remains high.Concerning CAD teaching there are severe problems. First of all there are not enough really good designers which know CAD in such a way that they can teach it. Second there is a shortage of equipment and a financial problem. Thirdly there is the question what the students need to know about CAD. which is not clear at the moment. At the University of California, Los Angeles, the following 5 subjects are teached: Computer Support, Computer Literacy, Professional Practice Implications, Exploration of CAD as a Design Medium and Theoretical Foundations of CAD. To use computers as a medium it is necessary to understand architecture, its objects, its operators and its evaluation criteria. The last topic is considered at research level.
series	eCAADe
email
more	www.ecaade.org
last changed	2022/06/07 07:50

_id	8844
authors	Rasdorf, William J.
year	1984
title	Relational Database Modeling of Building Design Data
source	Computing in Civil Engineering Conference Proceedings (3rd : 1984 : San Diego). American Society Of Civil Engineers, pp. 364-371. CADLINE has abstract only
summary	This paper discusses the use of a relational database for representing the data gathered and derived during the building design process. In doing so, it considers the complexity of the relationships among a structure's topology, geometry, and attributes, and the critical requirements they impose on the development of a building design database. In the broad arena of computer-aided design, relational database management systems are establishing themselves as useful engineering tools. This is occurring at a time when engineers and architects are moving toward centralized and integrated databases of design information. In such a database, information is directly and readily available to all members of the design team, allowing them to work concurrently on an accurate representation of a wide variety of engineering design data. This paper presents the use of a relational database to model building design data and shows that the relationships among topology, geometry, and attributes can be successfully modeled relationally. The feasibility of interaction between engineering applications programs and the database is also indicated. Although the paper concentrates on structural design data for buildings, the relational model can also be used to represent the data of other engineering design disciplines as well as the data for other structures, assemblies, systems, and processes
keywords	relational database, civil engineering, CAD
series	CADline
last changed	2003/06/02 13:58

_id	676a
authors	Valiant, L.G.
year	1984
title	A Theory of the Learnable
source	Communications of the ACM. November,1984. vol. 27: pp. 1134-1142. includes bibliography
summary	In this paper the author regards learning as the phenomenon of knowledge acquisition in the absence of explicit programming. The author gives a precise methodology for studying this phenomenon from a computational viewpoint. It consists of choosing an appropriate information gathering mechanism, the learning protocol, and exploring the class of concepts that can be learned using it in a reasonable (polynomial) number of steps. Although inherent algorithmic complexity appears to set serious limits on the range of concepts that can be learned, the author shows that there are some important nontrivial classes of propositional concepts that can be learned in a realistic sense
keywords	AI, learning, natural languages, research, techniques, design, knowledge acquisition, theory
series	CADline
last changed	2003/06/02 13:58

_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	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	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

_id	6118
authors	Bentley, Jon L.
year	1984
title	Code Tuning -- Programming Pearls
source	communications of the ACM. February, 1984. vol. 27: pp. 91-96
summary	Efficiency is one of many problems in programming, and there are many ways to achieve it. This column is about a low-level approach . 'Code tuning' locates the expensive parts of an existing program and then modifies that code to improve its performance
keywords	programming, search, algorithms, techniques
series	CADline
last changed	2003/06/02 13:58

_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	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	ea4c
authors	Chang, Hsi and Iyengar, S. Sitharama
year	1984
title	Efficient Algorithms to Globally Balance a Binary Search Tree
source	Communications of the ACM. July, 1984. vol. 27: pp. 695-702. includes bibliography
summary	A binary search tree can be globally balanced by readjustment of pointers or with a sorting process in O(n) time, n being the total number of nodes. This paper presents three global balancing algorithms, one of which uses folding with the other two adopting parallel procedures. These algorithms show improvement in time efficiency over some sequential algorithms when applied to large binary search trees. A comparison of various algorithms is presented
keywords	techniques, parallel processing, algorithms, search, sorting
series	CADline
last changed	2003/06/02 13:58

_id	architectural_intelligence2023_10
id	architectural_intelligence2023_10
authors	Cheng Bi Duan, Su Yi Shen, Ding Wen Bao & Xin Yan
year	2023
title	Innovative design solutions for contemporary Tou-Kung based on topological optimisation
doi	https://doi.org/https://doi.org/10.1007/s44223-023-00028-x
source	Architectural Intelligence Journal
summary	Tou-Kung, which is pronounced in Chinese and known as Bracket Set (Liang & Fairbank, A pictorial history of Chinese architecture, 1984), is a vital support component in the Chinese traditional wooden tectonic systems. It is located between the column and the beam and connects the eave and pillar, making the heavy roof extend out of the eaves longer. The development of Tou-Kung is entirely a microcosm of the development of ancient Chinese architecture; the aesthetic structure and Asian artistic temperament behind Tou-Kung make it gradually become the cultural and spiritual symbol of traditional Chinese architecture. In the contemporary era, inheriting and developing Tou-Kung has become an essential issue. Several architects have attempted to employ new materials and techniques to integrate the traditional Tou-Kung into modern architectural systems, such as the China Pavilion at the 2010 World Expo and Yusuhara Wooden Bridge Museum. This paper introduces the topological optimisation method bi-directional evolutionary structural optimisation (BESO) for form-finding. BESO method is one of the most popular topology optimisation methods widely employed in civil engineering and architecture. Through analyzing the development trend of Tou-Kung and mechanical structure, the authors integrate 2D and 3D optimisation methods and apply the hybrid methods to form-finding. Meanwhile, mortise and tenon joint used to create stable connections with components of Tou-Kung are retained. This research aims to design a new Tou-Kung corresponding to “structural performance-based aesthetics”. The workflow proposed in this paper is valuable for Architrave and other traditional building components.
series	Architectural Intelligence
email
last changed	2025/01/09 15:00

_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

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