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	2ac0
authors	Galle, Per
year	1987
title	A Formalized Concept of Sketching in Automated Floor Plan Design
source	177 p. 1987. DIKO Research Report No.87/3
summary	CADLINE has abstract only. Automated floor plan design, though originally motivated by the difficulties encountered by architects manually designing building layouts, raise several questions that may be of relevance to related application areas as well. e.g. design of electronic circuitry. One such question is, 'how do we come from a given set of constraints on size and placement of rooms (components) to a set of floor plans (circuit layouts) that satisfy these constraints?' In manual architectural design, sketches are used as an intermediate step. The present work is a study of a number of formalizations of the sketch concept which have been or could be used in computer- generation of architectural floor plans. A particular type of sketch, called the 'delta-derivative', is suggested and developed. The delta-derivative of a desired solution plan is an approximation of that solution plan and usually several other similar or 'equivalent' solutions. The idea is to generate sketches ('abstract' plans) before solutions ('concrete' plans), because they are simpler to compute, weeding out sketches that are not 'promising', and trying to refine the remaining sketches into solutions proper, thus limiting the amount of combinatorial search. Several abstraction levels of sketches may be used in this process. However, constraints as specified by the user of an automated design system are assumed to apply to the solutions; therefore a major theoretical problem which is addressed in the report is the derivation of sketch-level constraints that define which sketches to be generated. A comprehensive floor plan design system based on these ideas has been implemented, and empirical results are reported which confirms certain predicted advantages of delta-derivatives but also shows that the sketch-level constraints based on the developed theory are too weak if used alone; they allow generation of too many sketches which cannot possibly be refined into solutions. The report finally conjectures a solution to this problem
keywords	CAD, planning, architecture, floor plans, design, combinatorics, programming, abstraction
series	CADline
last changed	1999/02/12 15:08

_id	ddss2006-hb-187
id	DDSS2006-HB-187
authors	Lidia Diappi and Paola Bolchi
year	2006
title	Gentrification Waves in the Inner-City of Milan - A multi agent / cellular automata model based on Smith's Rent Gap theory
source	Van Leeuwen, J.P. and H.J.P. Timmermans (eds.) 2006, Innovations in Design & Decision Support Systems in Architecture and Urban Planning, Dordrecht: Springer, ISBN-10: 1-4020-5059-3, ISBN-13: 978-1-4020-5059-6, p. 187-201
summary	The aim of this paper is to investigate the gentrification process by applying an urban spatial model of gentrification, based on Smith's (1979; 1987; 1996) Rent Gap theory. The rich sociological literature on the topic mainly assumes gentrification to be a cultural phenomenon, namely the result of a demand pressure of the suburban middle and upper class, willing to return to the city (Ley, 1980; Lipton, 1977, May, 1996). Little attempt has been made to investigate and build a sound economic explanation on the causes of the process. The Rent Gap theory (RGT) of Neil Smith still represents an important contribution in this direction. At the heart of Smith's argument there is the assumption that gentrification takes place because capitals return to the inner city, creating opportunities for residential relocation and profit. This paper illustrates a dynamic model of Smith's theory through a multi-agent/ cellular automata system approach (Batty, 2005) developed on a Netlogo platform. A set of behavioural rules for each agent involved (homeowner, landlord, tenant and developer, and the passive 'dwelling' agent with their rent and level of decay) are formalised. The simulations show the surge of neighbouring degradation or renovation and population turn over, starting with different initial states of decay and estate rent values. Consistent with a Self Organized Criticality approach, the model shows that non linear interactions at local level may produce different configurations of the system at macro level. This paper represents a further development of a previous version of the model (Diappi, Bolchi, 2005). The model proposed here includes some more realistic factors inspired by the features of housing market dynamics in the city of Milan. It includes the shape of the potential rent according to city form and functions, the subdivision in areal submarkets according to the current rents, and their maintenance levels. The model has a more realistic visualisation of the city and its form, and is able to show the different dynamics of the emergent neighbourhoods in the last ten years in Milan.
keywords	Multi agent systems, Housing market, Gentrification, Emergent systems
series	DDSS
last changed	2006/08/29 12:55

_id	ecaaderis2023_45
id	ecaaderis2023_45
authors	Morton, David, Ahmed, Tarek MF and Humphery, Richard
year	2023
title	BIM and Teaching in Architecture: Current thinking and approaches
source	De Luca, F, Lykouras, I and Wurzer, G (eds.), Proceedings of the 9th eCAADe Regional International Symposium, TalTech, 15 - 16 June 2023, pp. 105–115
summary	Increasing use of BIM has represented a continuing shift in traditional assumptions on how we navigate the design process. BIM is affording the student the ability to gain a greater understanding of their design ideas via the exploration of scale, spatial organisation and structure, amongst many other design layers, in increasing levels of detail, at the same point in the design process. Architectural education is at a delayed tipping point where architectural students are increasingly looking towards BIM to streamline their design process drawn by the production of realistic visualisation, but with a lack of knowledge and skill in its application. With a lack of guidance and understanding around the application of BIM, the use of BIM in this manner overlooks the potential of BIM to construct and test virtual simulations of proposed schemes, to support design enquiry. A historical concern for the pedagogy constructed around the students’ design process is the application of methods and techniques that support the progression through the design process, (Ambrose, 2014; dash mei & Safari, 2018). This study examines the design process of architectural students and the interaction between analogue and digital methods used in design. These primary modes of communication, offer the opportunity to query the roles and rules of traditional architectural conventions around ‘problem finding’ and ‘problem solving’, challenging the ‘traditional’ design process examined by pioneers like Bruner (1966) and Schon (1987). These approaches are distilled from the findings of the study and presented as guidance to those teaching in architectural aBIMemia to align pedagogic goals to methods of abstraction in this new era of design education reconsidering digital methods in design.
keywords	BIM, BIM, Design Process, Architecture, Learning
series	eCAADe
email
last changed	2024/02/05 14:28

_id	4910
authors	Rasdorf, William J. and Watson, Bruce R.
year	1987
title	A Knowledge-Based Approach to Engineering Information Retrieval and Management
source	London, UK: Chapman and Hall Ltd., 1987. pp. 267-295
summary	Building design, construction, operation, maintenance, and control are all processes that have achieved various levels of computer use. Although the degree of computerization varies significantly, one common aspect of the computing needs of each process is an abundance of data in the form of tables, standards, project definition information, catalogs, etc. In most cases this data is stored in files which are independently used for input to stand-alone single-process application programs, such as a structural analysis application. The utility of these independent files is therefore limited to a single application. As concepts of integration of engineering applications evolved, the use of databases and database management systems (DBMS) increased. A number of issues of significant concern emerged. First, there is a need to retrieve data from many independent, possibly widely distributed databases. Second, there is a need for a uniform means of doing so. Third, such databases routinely undergo dynamic change. Changes in a database schema commonly result from the evolution of a design, from changes in the design process itself, and from changes in other subsequent downstream processes. Such continuing changes must be reflected in the database schemas and they subsequently require that application programs be updated and that online users be educated on a continuing basis. This chapter describes a knowledge-based expert system that provides access to and integration of the many underlying databases needed to support the building design/construction process. The unique aspect of the expert system presented in this chapter is its capture of the knowledge that an experienced human user incorporates in his search for data in a database, i.e., it seeks to identify and use the generic knowledge needed to operate a DBMS to retrieve data. This knowledge is used by the interface to enable both the online users and the application programs to request data without knowing the data's location or precisely how to ask for it. Further, the interface makes use of mechanisms that allow the user to request data without knowing the exact name by which it is stored in the database. In doing so it formalizes the levels of complexity of that knowledge and points out the multidisciplinary applications of the research results
keywords	civil engineering, knowledge base, database, expert systems
series	CADline
last changed	2003/06/02 10:24

_id	ddss9846
id	ddss9846
authors	Rigatti, Decio
year	1998
title	Rubem Berta Housing Estate: Order and Structure, Designand Use
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	The main goal of this paper is to investigate, through some space configurational based tools, a quite common phenomenon found in many different locations in Brazil, concerning the process of urban changes individually introduced by dwellers of public housing estates. A significant number of housing estates, particularly those designed according to rationalist concepts, seem to be unable to support space related social requirements and are then widely transformed when compared to the original layouts. Beyond the quantitative features, the morphological changes that take place in those housing estates mean a fundamental new approach to understand how completely new urban structures can arisefrom the space produced by a comprehensive urban design, took as a starting point for the transformations made by the dwellers of those settlements. As a case study is analysed the Rubem Berta Housing Estate which was built in Porto Alegre/RS, Brazil, for 20,000 people in the late 70’s. Since the begining of its occupation in 1986 and the invasion that took place in 1987, the urban transformations there have never stopped. It’s possible to realize that the dwellers individually use some constant physical rules to define the new settlement which are very similar within the estate itself and, at the same time, very similar to those found in other transformed housing estates of this sort. The physical rules introduced change the features of the entire settlement in two different levels: a) locally, through the transformations introduced in order to solve individual needs; b) globally, the local rules of physical transformations produce a new overall structure for the whole urban complex. The knowledge of this process makes it possible to bring to the surface of architectural theory some generic configurational codes that can be used as a tool for designing public housing estates in Brazil.
series	DDSS
last changed	2003/08/07 16:36

_id	e3a4
authors	Girard, Michael
year	1987
title	Interactive Design of 3D Computer-Animated Legged Animal Motion
source	IEEE Computer Graphics and Applications. June, 1987. vol. 7: pp. 39-51 : ill. includes bibliography
summary	A visually interactive approach to the design of 3D computer- animated legged animal motion in the context of the PODA computer animation system is presented. The design process entails the interactive specification of parameters that drive a computational model for animal movement. The animator incrementally modifies a framework for establishing desired limb and body motion as well as the constraints imposed by physical dynamics (Newtonian mechanical properties) and temporal restrictions. PODA uses the desired motion and constraints specified by the animator to produce motion through an idealized model of the animal's adaptive dynamic control strategies
keywords	computer graphics, animation
series	CADline
last changed	1999/02/12 15:08

_id	671c
authors	Kalay, Yehuda E., Swerdloff, Lucien M. and Harfmann, Anton C.
year	1987
title	A Knowledge-Based Approach to Dynamic Computer-Aided Design Task Allocation
source	Expert Systems in Computer-Aided Design: Proceeding of the IFIP WG 5.2 Working Conference on Expert system in Computer-Aided Design --- edited by Gero, John S Sydney: North-Holland, 1987. pp. 203-224 : ill. includes bibliography.
summary	A model of the design process control that supports dynamic allocation of tasks between a designer and a computer is presented. The model is discussed theoretically, and is demonstrated through a Prolog implementation for the participatory design of single family houses. Its utility and universal applicability are established, as well as its relationship to other computational approaches to design automation
keywords	expert systems, design process, knowledge base, architecture, control, housing, applications
series	CADline
email
last changed	2003/06/02 13:58

_id	c7e0
id	c7e0
authors	Maria Gabriela Caffarena Celani
year	2002
title	BEYOND ANALYSIS AND REPRESENTATION IN CAD: A NEW COMPUTATIONAL APPROACH TO DESIGN EDUCATION
source	Submitted to the Department of Architecture in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the field of Architecture: Design & Computation at the Massachusetts Institute of Technology
summary	This thesis aims at changing students' attitude towards the use of computer-aided design (CAD) in architecture. It starts from the premise that CAD is used mostly for analysis and representation, and not as a real design aide, and that architecture students have a bias against learning computer programming. For this purpose, a prototypical instruction system that mixes computer-aided design and computational design theory was developed, based on a series of fundamental concepts that are common to both fields. This system was influenced by Mitchell's (1987) The Art of Computer Graphics Programming and Stiny's (1976) shape grammars. Despite being based on solid theoretical foundations, CAD has progressively become an exclusively practical tool, since its origins in the 50's and 60's, while computational design theories have been mostly restricted to the academic circles. This thesis proposes an inversion in the present situation: the study of CAD theory, and the application of computational design into practice. The system proposed provides a conceptual framework that can be adapted to different circumstances, including course formats and resources, as well as students' background and technical training. It is based on seven fundamental concepts from computational design theories that are also important to the study of shape grammars: symmetry, recursion, rule-based compositions, parameterization of shapes, generative systems, algorithmization of design procedures, and shape emergence. These concepts are introduced within a CAD context, where their practical implementation and experimentation are possible, focusing the understanding of the computational nature of design. During this research, the proposed system was tested in two case studies with students from schools that had contrary orientations in terms of the importance of CAD in the architectural curriculum. In these experimental courses, students' activities evolved from using a commercial CAD tool in an innovative way, to the use of programming techniques for creating meaningful tools. Despite not having a statistical reach, the fieldwork allowed drawing preliminary conclusions about the proposed system's efficacy, since virtually all the students reported changing their understanding of the role of CAD in architecture, while some also acknowledged a conceptual influence in other subjects and in the way they see architecture.
keywords	Symmetry
series	thesis:PhD
type	normal paper
email
more	http://www.fec.unicamp.br/~celani/
last changed	2004/11/17 20:51

_id	404e
authors	Oksala , T.
year	1988
title	Logical Models for Rule-based CAAD
source	CAAD futures ‘87 [Conference Proceedings / ISBN 0-444-42916-6] Eindhoven (The Netherlands), 20-22 May 1987, pp. 107-116
summary	The aim of this paper is to present the basic results of a theoretic approach to represent architectural individual forms in CAD systems. From the point of view of design methodology and problem solving these descriptions might be conceived' as parts of possible environments satisfying the laws of some design theory in logical sense. This paper describes results in a series of logical studies towards rule and knowledge based systems for design automation. The effective use of programming languages and computers as design aids in architecture presupposes certain capabilities to articulate built environment logically. The use of graphic languages in the description of environmental items e.g. buildings might be theoretically mastered by formal production systems including linguistic, geometric, and spatio-material generation. The combination of the power of formal mechanisms and logical individual calculus offers suitable framework to generate arbitrary e.g. free spatial compositions as types or unique solutions. In this frame it is natural to represent in a coherent way very complex hierarchical parsing of buildings in explicit form as needed in computer implementations. In order to simulate real design work the individual configurations of possible built forms should be designed to satisfy known rules. In the preliminary stage partial solutions to design problems may be discussed in mathematical terms using frameworks like lattices, graphs, or group theoretical considerations of structural, functional, and visual organization of buildings. The capability to produce mathematically sophisticated geometric structures allows us to generalize the approach further. The theoretical design knowhow in architecture can be partly translated in to some logic and represented in a knowledge base. These rules are used as selection criteria for geometric design candidates in the sense of logical model theory and mathematical optimization. The economy of the system can be developed by using suitable conduct mechanisms familiar e.g. from logic programming. The semantics of logic offers a frame to consider computer assisted and formal generation in design. A number of semantic and pragmatic problems, however, remain to be solved. In any case conceptual analyses based on logic are applicable in order to rationally reconstruct architectural goals contributing to the quality of environmental design, which should be the main goal in the development of design systems in near future.
series	CAAD Futures
last changed	1999/04/03 17:58

_id	0a9c
authors	Ozel, Filiz
year	1987
title	The Computer Model "BGRAF": A Cognitive Approach to Emergency Egress Simulation
source	University of Michigan
summary	During the past decade, fire safety researchers have come to the understanding that human factors in fires play an important role in controlling the spread of fire; and in decreasing the number of fire casualties in buildings. With the current developments in computer technology, computer modeling of human behavior in fires emerged as an effective method of research. Such computer modeling techniques offered the advantage of being able to experiment with hypothetical fires in buildings without Note endangering human life. Consequently, a study to develop a computer model that will simulate the emergency egress behavior of people in fires was undertaken. Changes in the information processing capacity of the individual as a result of time pressure and stress was considered as part of the emergency egress decision process. Theories from environmental psychology identified a range of cognitive factors, such as visual access in buildings, architectural differentiation, signage and plan configuration that affect way finding and route selection in buildings. These factors needed to be incorporated into emergency egress models. The model was based on the integrated building data base of the CAD system developed at the University of Michigan, Architecture and Planning Lab., which provided a comprehensive building definition, and allowed both graphic and tabular output. Two actual fire incidences were simulated as part of the validation study. These studies have stressed the importance of the cognitive aspects of the physical environment as a factor in emergency egress. A goal structure that represented the total decision process during fires was incorporated into the model. This structure allowed the inputting and testing of a variety of goal structures by using actions as model blocks. The objectives of the model developed in this study can best be summarized as to study and eventually to predict the route selection and exiting behavior in fires, with the purpose of using such information in making building design and code development decisions, and in suggesting action sequences that will best support the safety of the occupants of a building under different emergency conditions.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	6683
authors	Rasdorf, William J. and Wang, TsoJen E.
year	1987
title	Spike : A Generic Design Standards Processing Expert System
source	Southampton, UK: Computational Mechanics Publications, pp. 241-257. Also published in : Applications of Artificial Intelligence in Engineering International Conference Proceedings (2nd. : 1987 : Boston, MA.)
summary	Standards, codes, and specifications play an important role in the design of buildings, bridges, and other engineering systems. A design configuration must be checked against all standards to ensure that it is acceptable. This process of design conformance checking using standards is often very tedious. The successful automation of conformance checking is one of the components of a comprehensive computer-aided design system. In that past, standards were interpreted and converted into application programs written in procedural programming languages such as FORTRAN. This approach is extremely inflexible and often error-prone. To support a fully automated computer-aided design system, standards must be incorporated into the design process in a more generic and flexible manner. This paper investigates the feasibility of alternatively casting standards in a form suitable for processing in a knowledge-based expert system environment. The emergence of expert systems from artificial intelligence research has provided a technology that readily lends itself to the automation of design standards. Knowledge-based expert systems have become a powerful tool in tackling domains like design where some of the problem-solving knowledge is diverse and ill-structured. Using an expert system tool, a standard can be represented and processed independent of a CAD application program. Two prototype standards processing systems utilizing the production system approach have been constructed and are presented herein. Although the obvious direct translation casting the provisions of a standard as rules in a production system has its advantages, a more generic and flexible representation scheme is proposed herein. The approach advocated in this paper is to represent standards as databases of facts which can be readily and generically processed by an expert system. The database representation is derived from a unified view of standards obtained by using the standards modeling tools proposed by previous researchers in this field during the past decade. Building on this existing technology resulted in a knowledge- based standards processing architecture which is generic, modular, and flexible. An implementation of this architecture is presented and described
keywords	standards, civil engineering, expert systems
series	CADline
last changed	2003/06/02 13:58

_id	0a09
authors	Akin, O., Dave, B. and Pithavadian, S.
year	1987
title	Problem Structuring in Architectural Design
source	February, 1987. [4], 15 p. : ill. includes bibliography
summary	The purpose of this research is to describe in operational terms the process of problem structuring while solving spatial problems in architectural design. The designer's behavior is described in terms of problem structuring, when problem parameters are established or transformed, and in terms of problem solving when these parameters are satisfied in a design solution. As opposed to problem solving, the structuring of problems is an under-studied but crucial aspect of complex tasks such as design. This work is based on observations derived from verbal protocol studies. To consider various levels of skill, the research subjects range from professional architects to novice designers. Subjects are given space planning problems which require them to develop solutions in accordance with individually established constraints and criteria, the majority of which are not explicit stated in the problem description. Based on the results of the protocol analysis, a framework is developed which explains how information processing characteristics, problem structure and different levels of expertise interact to influence the designer behavior
keywords	architecture, design process, problem solving, protocol analysis, problem definition
series	CADline
email
last changed	2003/05/17 10:09

_id	ae05
authors	Akin, Omer
year	1987
title	Expertise of the Architect
source	November, 1987. [13] p. unevenly numbered : ill. includes bibliography
summary	One of the areas where the expertise of the seasoned architect comes out is in the initial structuring of design problems. During problem structuring the parameters and processes used in design are defined. Experienced architects modify these parameters both in global and local levels as a function of the success of their research process. Experienced architects also rely on 'scenarios' acquired through pervious experiences with similar problems to initialize their problem structures or to redefined them
keywords	design, architecture, methods
series	CADline
email
last changed	2003/05/17 10:09

_id	8c73
authors	Van Wyk, C.G. Skip
year	1987
title	CAAD Usage: Now and When At OSU
source	Integrating Computers into the Architectural Curriculum [ACADIA Conference Proceedings] Raleigh (North Carolina / USA) 1987, pp. 121-134
doi	https://doi.org/10.52842/conf.acadia.1987.121
summary	In February of this year the Department of Architecture at The Ohio State University began a study to determine existing and long-term needs and expectations regarding the use of computers in teaching, research, administration, and service. The results of the study are to aid in two broad planning objectives: (1) facility, hardware, and software acquisition; and (2) curriculum enhancement, faculty and staff development, and support services (i.e., consultants, lab monitors, etc.). An interview technique was developed to address three main concerns: (1) how computers are and should be utilized in areas--i.e., research, course preparation, lecture delivery, computer-aided instruction, grading and monitoring, and student exercises; (2) what kinds of applications are and should be utilized--i.e., word processing, statistics, graphics, drafting, modeling, audio-visual, database, etc.; and (3) what problems or concerns stand in the way of achieving the desired levels of computer usage. The twenty-three full-time faculty surveyed (96% participation) represent 65 curriculum courses varying in format from design studio and labs to lecture. This paper outlines the methods of the study and presents the findings via graphs of current and desired computer usage by both area and application along with a graphic summary of statistics and trends. Also presented are a summary of root problems and concerns noted during the interview process and conclusions and limitations of study.
series	ACADIA
email
last changed	2022/06/07 07:58

_id	eb5f
authors	Al-Sallal, Khaled A. and Degelman, Larry 0.
year	1994
title	A Hypermedia Model for Supporting Energy Design in Buildings
source	Reconnecting [ACADIA Conference Proceedings / ISBN 1-880250-03-9] Washington University (Saint Louis / USA) 1994, pp. 39-49
doi	https://doi.org/10.52842/conf.acadia.1994.039
summary	Several studies have discussed the limitations of the available CAAD tools and have proposed solutions [Brown and Novitski 1987, Brown 1990, Degelman and Kim 1988, Schuman et al 1988]. The lack of integration between the different tasks that these programs address and the design process is a major problem. Schuman et al [1988] argued that in architectural design many issues must be considered simultaneously before the synthesis of a final product can take place. Studies by Brown and Novitski [1987] and Brown [1990] discussed the difficulties involved with integrating technical considerations in the creative architectural process. One aspect of the problem is the neglect of technical factors during the initial phase of the design that, as the authors argued, results from changing the work environment and the laborious nature of the design process. Many of the current programs require the user to input a great deal of numerical values that are needed for the energy analysis. Although there are some programs that attempt to assist the user by setting default values, these programs distract the user with their extensive arrays of data. The appropriate design tool is the one that helps the user to easily view the principal components of the building design and specify their behaviors and interactions. Data abstraction and information parsimony are the key concepts in developing a successful design tool. Three different approaches for developing an appropriate CAAD tool were found in the literature. Although there are several similarities among them, each is unique in solving certain aspects of the problem. Brown and Novitski [1987] emphasize the learning factor of the tool as well as its highly graphical user interface. Degelman and Kim [1988] emphasize knowledge acquisition and the provision of simulation modules. The Windows and Daylighting Group of Lawrence Berkeley Laboratory (LBL) emphasizes the dynamic structuring of information, the intelligent linking of data, the integrity of the different issues of design and the design process, and the extensive use of images [Schuman et al 19881, these attributes incidentally define the word hypermedia. The LBL model, which uses hypermedia, seems to be the more promising direction for this type of research. However, there is still a need to establish a new model that integrates all aspects of the problem. The areas in which the present research departs from the LBL model can be listed as follows: it acknowledges the necessity of regarding the user as the center of the CAAD tool design, it develops a model that is based on one of the high level theories of human-computer interaction, and it develops a prototype tool that conforms to the model.
series	ACADIA
email
last changed	2022/06/07 07:54

_id	sigradi2013_234
id	sigradi2013_234
authors	Alencar, Viviane; Gabriela Celani
year	2013
title	The Art of Computer Graphics Programming: Translating Pioneer Programs
source	SIGraDi 2013 [Proceedings of the 17th Conference of the Iberoamerican Society of Digital Graphics - ISBN: 978-956-7051-86-1] Chile - Valparaíso 20 - 22 November 2013, pp. 500 - 504
summary	Considering the importance of the use of programming languages for teaching computational design to architects, this paper proposes the translation of computer programs from a pioneer work in this field into a more contemporary programming language. The book The Art of Computer Graphics Programming: A Structured Introduction for Architects and Designers was published in 1987 by William J. Mitchell, Robin Ligget and Thomas Kvan, and remains an important reference for architects. The original Pascal codes in the book were translated into Processing, and made available through an Internet website, along with images and comments, in order to give late Prof. Mitchell’s work the consideration it deserves.
keywords	Processing; Pascal; Computer graphics
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	016a
authors	Balachandran, M. B. and Gero, John S.
year	1987
title	A Knowledge-based Approach to Mathematical Design Modeling and Optimization
source	engineering Optimization. 1987. vol. 12: pp. 91-115
summary	Optimization is a well understood process in design domains. Designers formulate their design problems as single criterion or multicriteria optimization problems and then select an appropriate optimization algorithm to search for the optimal values for the design variables. The formulation and algorithm selection procedures have been considered to be activities which relied on substantive human knowledge. This paper describes a computer system, OPTIMA, which formulates design optimization problems from a pseudo-English description into canonical algebraic expressions. It then recognizes the formulation and selects appropriate algorithm(s) for its solution. Finally, it runs the selected algorithm(s) and sends the results back to the original descriptions. Areas of expert knowledge involved in carrying out the above tasks are identified. Such knowledge is explicitly encoded in the system. The basic philosophy and key features of the system are described and are illustrated with examples
keywords	structures, algorithms, knowledge base, systems, optimization, engineering
series	CADline
email
last changed	2003/06/02 13:58

_id	cf2011_p170
id	cf2011_p170
authors	Barros, Mário; Duarte José, Chaparro Bruno
year	2011
title	Thonet Chairs Design Grammar: a Step Towards the Mass Customization of Furniture
source	Computer Aided Architectural Design Futures 2011 [Proceedings of the 14th International Conference on Computer Aided Architectural Design Futures / ISBN 9782874561429] Liege (Belgium) 4-8 July 2011, pp. 181-200.
summary	The paper presents the first phase of research currently under development that is focused on encoding Thonet design style into a generative design system using a shape grammar. The ultimate goal of the work is the design and production of customizable chairs using computer assisted tools, establishing a feasible practical model of the paradigm of mass customization (Davis, 1987). The current research step encompasses the following three steps: (1) codification of the rules describing Thonet design style into a shape grammar; (2) implementing the grammar into a computer tool as parametric design; and (3) rapid prototyping of customized chair designs within the style. Future phases will address the transformation of the Thonet’s grammar to create a new style and the production of real chair designs in this style using computer aided manufacturing. Beginning in the 1830’s, Austrian furniture designer Michael Thonet began experimenting with forming steam beech, in order to produce lighter furniture using fewer components, when compared with the standards of the time. Using the same construction principles and standardized elements, Thonet produced different chairs designs with a strong formal resemblance, creating his own design language. The kit assembly principle, the reduced number of elements, industrial efficiency, and the modular approach to furniture design as a system of interchangeable elements that may be used to assemble different objects enable him to become a pioneer of mass production (Noblet, 1993). The most paradigmatic example of the described vision of furniture design is the chair No. 14 produced in 1858, composed of six structural elements. Due to its simplicity, lightness, ability to be stored in flat and cubic packaging for individual of collective transportation, respectively, No. 14 became one of the most sold chairs worldwide, and it is still in production nowadays. Iconic examples of mass production are formally studied to provide insights to mass customization studies. The study of the shape grammar for the generation of Thonet chairs aimed to ensure rules that would make possible the reproduction of the selected corpus, as well as allow for the generation of new chairs within the developed grammar. Due to the wide variety of Thonet chairs, six chairs were randomly chosen to infer the grammar and then this was fine tuned by checking whether it could account for the generation of other designs not in the original corpus. Shape grammars (Stiny and Gips, 1972) have been used with sucesss both in the analysis as in the synthesis of designs at different scales, from product design to building and urban design. In particular, the use of shape grammars has been efficient in the characterization of objects’ styles and in the generation of new designs within the analyzed style, and it makes design rules amenable to computers implementation (Duarte, 2005). The literature includes one other example of a grammar for chair design by Knight (1980). In the second step of the current research phase, the outlined shape grammar was implemented into a computer program, to assist the designer in conceiving and producing customized chairs using a digital design process. This implementation was developed in Catia by converting the grammar into an equivalent parametric design model. In the third phase, physical models of existing and new chair designs were produced using rapid prototyping. The paper describes the grammar, its computer implementation as a parametric model, and the rapid prototyping of physical models. The generative potential of the proposed digital process is discussed in the context of enabling the mass customization of furniture. The role of the furniture designer in the new paradigm and ideas for further work also are discussed.
keywords	Thonet; furniture design; chair; digital design process; parametric design; shape grammar
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	ecaade2017_172
id	ecaade2017_172
authors	Brand?o, Filipe, Paio, Alexandra and Whitelaw, Christopher
year	2017
title	Mapping Mass Customization
source	Fioravanti, A, Cursi, S, Elahmar, S, Gargaro, S, Loffreda, G, Novembri, G, Trento, A (eds.), ShoCK! - Sharing Computational Knowledge! - Proceedings of the 35th eCAADe Conference - Volume 2, Sapienza University of Rome, Rome, Italy, 20-22 September 2017, pp. 417-424
doi	https://doi.org/10.52842/conf.ecaade.2017.2.417
summary	Mass customization (MC) and personal fabrication (PF) are current relevant topics in architecture offices practice and schools design research. Architects are adopting information based design and production techniques as a response to architectural century challenges. However, is not clear how various authors used and transformed the concept in practice, research and industry after three decades since the MC term was introduced by Davis (1987). Therefore, is essential to map the most relevant works in the field in relation to production and design control. The paper presents some of the results of the ongoing study through an evolving map that aims to visualize relationships, layering complexity and revealing difference.
keywords	Mass Customization; Personal Fabrication; Housing; Map
series	eCAADe
email
last changed	2022/06/07 07:54

_id	8e02
authors	Brown, A.G.P. and Coenen, F.P.
year	2000
title	Spatial reasoning: improving computational efficiency
source	Automation in Construction 9 (4) (2000) pp. 361-367
summary	When spatial data is analysed the result is often very computer intensive: even by the standards of contemporary technologies, the machine power needed is great and the processing times significant. This is particularly so in 3-D and 4-D scenarios. What we describe here is a technique, which tackles this and associated problems. The technique is founded in the idea of quad-tesseral addressing; a technique, which was originally applied to the analysis of atomic structures. It is based on ideas concerning Hierarchical clustering developed in the 1960s and 1970s to improve data access time [G.M. Morton, A computer oriented geodetic database and a new technique on file sequencing, IBM Canada, 1996.], and on atomic isohedral (same shape) tiling strategies developed in the 1970s and 1980s concerned with group theory [B. Grunbaum, G.C. Shephard, Tilings and Patterns, Freeman, New York, 1987.]. The technique was first suggested as a suitable representation for GIS in the early 1980s when the two strands were brought together and a tesseral arithmetic applied [F.C. Holdroyd, The Geometry of Tiling Hierarchies, Ars Combanitoria 16B (1983) 211–244.; S.B.M. Bell, B.M. Diaz, F.C. Holroyd, M.J.J. Jackson, Spatially referenced methods of processing raster and vector data, Image and Vision Computing 1 (4) (1983) 211–220.; Diaz, S.B.M. Bell, Spatial Data Processing Using Tesseral Methods, Natural Environment Research Council, Swindon, 1986.]. Here, we describe how that technique can equally be applied to the analysis of environmental interaction with built forms. The way in which the technique deals with the problems described is first to linearise the three-dimensional (3-D) space being investigated. Then, the reasoning applied to that space is applied within the same environment as the definition of the problem data. We show, with an illustrative example, how the technique can be applied. The problem then remains of how to visualise the results of the analysis so undertaken. We show how this has been accomplished so that the 3-D space and the results are represented in a way which facilitates rapid interpretation of the analysis, which has been carried out.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

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