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	3f1d
authors	Mahalingam, Ganapathy
year	1995
title	The Application of Object-Oriented Computing In The Development of Design Systems for Auditoria
source	University of Florida
summary	This dissertation has a two-part theoretical basis. The first part is that architectural entities like spatial enclosures can be modeled as computational objects in object-oriented design systems. The second part is that spatial forms of auditoria can be generated from acoustical, functional and programmatic parameters. The method used to establish the theoretical basis is the application of the concepts of object-oriented computing in the development of design systems for auditoria. As a practical demonstration of the theoretical basis, two object-oriented design systems for the preliminary spatial design of fan-shaped and rectangular proscenium-type auditoria were developed. In the two systems, the concept of acoustic sculpting is used to convert acoustical, functional and programmatic parameters into architectural parameters used in the spatial design of the auditoria. Statistical, analytical and mathematical methods are used to generate the spatial forms of the auditoria based on the various parameters. The auditoria are modeled as parametric computational objects. The implementation of the systems is described in detail. The systems are true design systems because they involve the creation of spatial information from nonspatial information. The application of acoustic sculpting in the implemented systems is tested with case studies. The results are presented and discussed. These systems serve as indicators of the potential of object-oriented design systems in architecture. The dissertation concludes with a projection of how the object-oriented computing paradigm can benefit the creation of design systems in architecture. Future directions for research and development are outlined.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	ec57
authors	Mahalingam, Ganapathy
year	1997
title	Representing Architectural Design Using Virtual Computers
doi	https://doi.org/10.52842/conf.acadia.1997.051
source	Design and Representation [ACADIA ‘97 Conference Proceedings / ISBN 1-880250-06-3] Cincinatti, Ohio (USA) 3-5 October 1997, pp. 51-61
summary	The concept of the virtual computer is one of the most significant ideas to emerge in the field of computing. Computational models of architectural design, including state models and process models, have been based in the past on the von Neumann model of computer systems. Von Neumann systems are characterized by stored programs and data, and sequential processing on a single processor. The concept of the virtual computer enables us to break away from the von Neumann model in the representation of architectural design. Virtual computers can now be used to represent architectural design using concepts of parallel or networked systems. One of the limitations of modeling architectural design processes on the computer has been the representation of the processes as serial processes. Virtual computers can eliminate that bottleneck. This paper introduces the concept of representing architectural design using virtual computers. The application of the concept in an auditorium design system developed by the author is briefly examined.
series	ACADIA
email
last changed	2022/06/07 07:59

_id	cd26
authors	Mahalingam, Ganapathy
year	1998
title	The Algorithmic Auditorium- A computational Model for Auditorium DesignThe Algorithmic Auditorium- A computational Model for Auditorium Design
doi	https://doi.org/10.52842/conf.caadria.1998.143
source	CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 143-152
summary	Auditorium design is a complex task. Various programmatic, functional and acoustical parameters have to be resolved in the spatial design of an auditorium. This ongoing research project deals with the development of a computer-aided design system for the preliminary spatial design of proscenium type auditoriums. The concept of “acoustic sculpting” is used to generate the spatial form of the auditorium from programmatic, functional and acoustical parameters. These parameters are incorporated using a combination of mathematical, empirical and statistical methods. The generation of the spatial form of the auditorium is implemented as an algorithm that is executed on the computer. The spatial form of the auditorium generated by the system is exported as a computer model for design development and acoustical analysis.
keywords	Auditorium Design, Acoustic Sculpting, Computational Modeling, Virtual Computers, Software-ICs
series	CAADRIA
email
more	http://www.caadria.org
last changed	2022/06/07 07:59

_id	cf2007_129
id	cf2007_129
authors	Mahalingam, Ganapathy
year	2007
title	Discovering Computational Structures in Architecture
source	Computer Aided Architectural Design Futures / 978-1-4020-6527-9 2007 [Proceedings of the 12th International Conference on Computer Aided Architectural Design Futures / 978-1-4020-6527-9] Sydney (Australia) 11–13 July 2007, pp. 129-137
summary	The linkage between the worlds of Architecture, which involves the design and construction of the built environment, and Computer Technology, which involves practical applications of computation, still has a vast, as yet untapped potential. What if the implications of the linked term, ‘computer-architecture,’ are explored to reveal its full scope? This paper describes a unique method to analyze and code works of Architecture in a way that enables one to discover hidden computational structures in the works of Architecture. The case being made here is that the inherent structures of architecture may be computational structures as well.
series	CAAD Futures
email
last changed	2007/07/06 12:47

_id	caadria2008_15_session2a_125
id	caadria2008_15_session2a_125
authors	Mahalingam, Ganapathy
year	2008
title	A Case For Architectural Computing: Computing Using Architectural Constructs
doi	https://doi.org/10.52842/conf.caadria.2008.125
source	CAADRIA 2008 [Proceedings of the 13th International Conference on Computer Aided Architectural Design Research in Asia] Chiang Mai (Thailand) 9-12 April 2008, pp. 125-131
summary	This paper is about the potential of architectural computing. Architectural computing is defined as computing that is done with computational structures that are based on architectural forms. An analysis of works of architecture reveals the embedded forms in the works of architecture. A uniform, connections-based representation of these architectural forms allows us to derive computational structures from them. These computational structures form the basis of architectural computing. In this paper a case is made for architectural computing, ideas are provided for how it could be done, and the benefits of architectural computing are briefly explored.
keywords	Architectural computing: architectural programming language; intentional programming; connections-based paradigm
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	ijac20032201
id	ijac20032201
authors	Mahalingam, Ganapathy; Kavasseri, Rajesh G.
year	2004
title	Improving Objective Digital Images with Neuronal Processing: A Computational Approach
source	International Journal of Architectural Computing vol. 2 - no. 2
summary	This paper describes an experiment where an imagerecorded with a digital camera is processed using anelectro-physiological model of a neuron. Theluminosity level of each pixel of the source image istreated as the stimulus for an individual neuron, andthe source image is transformed into a responseimage based on the processing behavior of theHodgkin-Huxley neuronal model. It is seen thattransformation of the image through neuronalprocessing yields (i) more evenly balanced levels ofluminosity and (ii) a more ‘subjective’ rendering of theenvironment than what was photographed with thedigital camera.The CCD (charge coupled device) –based digital camera reveals its limitation as a linearrecording device that does not have a balanceddynamic range.The neuronal processing of the imageadds non-linearity and a balanced range to theluminosity levels in the image, rendering it closer to a‘subjective’ perception of the scene.
series	journal
email
more	http://www.multi-science.co.uk/ijac.htm
last changed	2007/03/04 07:08

_id	ijac201816407
id	ijac201816407
authors	Mahankali, Ranjeeth; Brian R. Johnson and Alex T. Anderson
year	2018
title	Deep learning in design workflows: The elusive design pixel
source	International Journal of Architectural Computing vol. 16 - no. 4, 328-340
summary	The recent wave of developments and research in the field of deep learning and artificial intelligence is causing the border between the intuitive and deterministic domains to be redrawn, especially in computer vision and natural language processing. As designers frequently invoke vision and language in the context of design, this article takes a step back to ask if deep learning’s capabilities might be applied to design workflows, especially in architecture. In addition to addressing this general question, the article discusses one of several prototypes, BIMToVec, developed to examine the use of deep learning in design. It employs techniques like those used in natural language processing to interpret building information models. The article also proposes a homogeneous data format, provisionally called a design pixel, which can store design information as spatial-semantic maps. This would make designers’ intuitive thoughts more accessible to deep learning algorithms while also allowing designers to communicate abstractly with design software.
keywords	Associative logic, creative processes, deep learning, embedding vectors, BIMToVec, homogeneous design data format, design pixel, idea persistence
series	journal
email
last changed	2019/08/07 14:04

_id	cf2005_1_12_237
id	cf2005_1_12_237
authors	MAHDAVI Ardeshir
year	2005
title	Space, Time, Mind: Toward an Architecture of Sentient Buildings
source	Computer Aided Architectural Design Futures 2005 [Proceedings of the 11th International Conference on Computer Aided Architectural Design Futures / ISBN 1-4020-3460-1] Vienna (Austria) 20–22 June 2005, pp. 23-40
summary	This paper describes a specific vision of a sentient building and a specific path to its realization. A sentient building is defined here as one that possesses a representation of its own context, components, systems, and processes. It can autonomously maintain and update this representation, and it can use this representation toward real-time self-regulatory determination of its own state.
keywords	sentient buildings, computational models, environmental controls
series	CAAD Futures
email
last changed	2006/11/07 07:27

_id	ddssar0223
id	ddssar0223
authors	Mahdavi, A, Suter G. and Ries, R.
year	2002
title	A Representation Scheme for Integrated Building Performance Analysis
source	Timmermans, Harry (Ed.), Sixth Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings Avegoor, the Netherlands), 2002
summary	This paper presents a representational scheme for integrated building performance analysis. The underlying research work was motivated by the need for seamless exchange of structured design information.A comprehensive and widely accepted industry standard suitable for exchanging design information among the various AEC (Architecture/Engineering/Construction) applications has yet to emerge. As a contribution to this on-going discussion, we present a specific approach to the integration problem in building product modeling. This approach can be viewed as pragmatic or bottom-up in the sense that itwas driven by the informational needs of related individual domains (particularly in the early stages of design) rather than by a quest for a universally applicable solution. In this paper, we describe a schemawhich emerged from the SEMPER effort, a multi-year project aimed at supporting detailed performance analysis for early design in the energy, life-cycle analysis, lighting, and thermal comfort domains. Thisschema relies on a representational division of labor between a shared building model, and various disciplinary (domain) models. Specifically, we present a documentation of the shared object model together with disciplinary models for the energy, light, acoustics, and life-cyle assessment domain.
keywords	building product models, building performance, integration
series	DDSS
last changed	2003/08/07 16:36

_id	246c
authors	Mahdavi, A. and Pal, V.
year	1997
title	On the Problem of Operative Information in CAAD
source	CAAD Futures 1997 [Conference Proceedings / ISBN 0-7923-4726-9] München (Germany), 4-6 August 1997, pp. 231-244
summary	Computational building performance modeling typically generates large amounts of data. For this data to become operative information, i.e., provide effective feedback to the design process, it must adequately interface with the informational requirements and procedural characteristics of the building delivery process. Toward this end, this paper specifically addresses the potential of aggregate space-time performance indicators.
series	CAAD Futures
email
last changed	2003/02/26 17:26

_id	bf16
authors	Mahdavi, A. and Suter, G.
year	1998
title	On the implications of design process views for the development of computational design support tools
source	Automation in Construction 7 (2-3) (1998) pp. 189-204
summary	The empirical evidence indicates that the computational evaluation tools are not sufficiently and consistently used in the architectural design process. Various contributing factors have been suggested, most of which deal with tool deficiencies in terms of user communication features, stand-alone character, and informational complexity. Without questioning the potential impact of these factors, we suggest that circumstances pertaining to the representation and understanding of the design process must be taken into consideration, if a more in-depth understanding of the problem of tool deployment is to be achieved. Toward this end, we explore the possible impact of alternative design process views on the development of computational design evaluation tools. In particular, we describe how a nonconventional view of the design process can inform implementation efforts that lead to the emergence of new tools for active convergence support in design.
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	ddss9840
id	ddss9840
authors	Mahdavi, A., Akin, Ö. and Zhang, Y.
year	1998
title	Formalization of Concurrent Performance Requirementsin Building Problem Composition
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	Specification of performance requirements is an emerging area of research that promises to improve building design particularly during the early stages of design. Building problem decomposition and recomposition can be based on a number of requirement categories in order to group buildingfunctions into hierarchically organized groups. Traditionally this activity is known as stacking and blocking, or zoning; and limited to spatial requirements. Our long term objective is to broaden this set into a more comprehensive one, including thermal, acoustic, and daylighting; and improve the stateof- the-art in building performance specification. While domain information from various building performance areas may be applicable toward enriching the informational basis for stacking andblocking operations, this paper focuses primarily on the thermal and acoustic domain.
series	DDSS
last changed	2003/08/07 16:36

_id	7c87
authors	Mahdavi, A., Ilal, M.E. Mathew, O., Ries, R. and Suter, G.
year	1999
title	Aspects of S2
source	Proceedings of the Eighth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-8536-5] Atlanta, 7-8 June 1999, pp. 185-196
summary	We present in this paper the essential aspects of the S2 system. This is the internet realization of SEMPER, an active, multi-domain, space-based, object oriented design environment for integrated building performance modeling. The key features of the S2 environment are as follows: A user can access the system regardless of the computer hardware, operating system or the location on a network; geographically distributed users can asynchronously generate a building model through the user interface; this building model can then be simultaneously evaluated with multiple simulation applications running on remote simulation servers; persistent storage is provided for project data and evaluation results; designers using the system have access to multiple libraries that contain building information such as material data, construction types, schedules, and weather data.
keywords	Building Performance Simulation, Distributed System, Internet
series	CAAD Futures
email
last changed	2006/11/07 07:22

_id	d6d5
authors	Mahdavi, A., Mathew, P., Kumar, S. and Wong, N.
year	1997
title	Bi-directional computational design support in the SEMPER environment
source	Automation in Construction 6 (4) (1997) pp. 353-373
summary	We present a computational environment for bi-directional multi-domain building design support. We first describe the overall structure and the salient features of this computational environment (SEMPER). We then discuss in detail its bi-directional inference capability. We conclude with illustrative case studies.
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	e82c
authors	Mahdavi, A., Mathew, P. and Wong, N.H.
year	1997
title	A Homology-Based Mapping Approach to Concurrent Multi-Domain Performance Evaluation
doi	https://doi.org/10.52842/conf.caadria.1997.237
source	CAADRIA ‘97 [Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8] Taiwan 17-19 April 1997, pp. 237-246
summary	Over the past several years there have been a number of research efforts to develop integrated computational tools which seek to effectively support concurrent design and performance evaluation. In prior research, we have argued that elegant and effective solutions for concurrent, integrated design and simulation support systems can be found if the potentially existing structural homologies in general (configurational) and domain-specific (technical) building representations are creatively exploited. We present the use of such structural homologies to facilitate seamless and dynamic communication between a general building representation and multiple performance simulation modules – specifically, a thermal analysis and an air-flow simulation module. As a proof of concept, we demonstrate a computational design environment (SEMPER) that dynamically (and autonomously) links an object-oriented space-based design model, with structurally homologous object models of various simulation routines.
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	2192
authors	Mahdavi, A., Mathew, P., Hartkopf, V. and Loftness, V.
year	1996
title	Bi-directional Inference in Thermal Design
doi	https://doi.org/10.52842/conf.acadia.1996.133
source	Design Computation: Collaboration, Reasoning, Pedagogy [ACADIA Conference Proceedings / ISBN 1-880250-05-5] Tucson (Arizona / USA) October 31 - November 2, 1996, pp. 133-143
summary	This paper demonstrates a computational bi-directional energy modeling approach for building design development. Conventional simulation tools may be labeled as mono-directional in that they require a more or Iess complete design definition in order to derive performance indicators. However, in certain circumstances, it may be desirable to reverse this process: a bi-directional (or "open") inference mechanism would allow for the identification of those changes in the design variables that would accommodate a desired change in a performance indicator. The performance-to-design mapping process is an ambiguous one: the same performance (e.g. energy use of a building, temperature variations in a space) may be achieved by different design configurations (various wall and window dimensions/properties, building orientation/massing, etc.). As a result, the actual implementation of a bi-directional inference tool is a rather difficult task. The development described in this paper utilizes a preference-based approach that involves the formalization of various external or internal constraints and preferences (such as code and standard requirements, results of post-occupancy studies, individual priorities of designers and their clients, etc.) in terms of normalized numeric scales. After a brief review of the underlying technology for the implementation of the inference engine, the paper demonstrates an actual design session using a bi-directional thermal simulation tool. Specifically, a use-scenario is described in which the designer explores the tradeoffs between various design variables (glazing area, glazing type, and floor mass) in view of the resulting energy performance of a typical residential building. The paper concludes with a discussion of the potential and limitations of the bi-directional approach toward active convergence support for performance-oriented design development.
series	ACADIA
email
last changed	2022/06/07 07:59

_id	e02e
authors	Mahdavi, A., Mathew, P., Lee, S., Brahme, R., Kumar, S., Liu, G., Ries, R. and Wong, N.H.
year	1996
title	On the Structure and Elements of SEMPER
doi	https://doi.org/10.52842/conf.acadia.1996.071
source	Design Computation: Collaboration, Reasoning, Pedagogy [ACADIA Conference Proceedings / ISBN 1-880250-05-5] Tucson (Arizona / USA) October 31 - November 2, 1996, pp. 71-84
summary	This paper introduces the concept, structure, components, and application results of "SEMPER", an active, multi-aspect computational tool for comprehensive simulation-based design assistance. Specifically, SEMPER seeks to meet the following requirements: a) a methodologically consistent (first- principles-based) performance modeling approach through the entire building design and engineering process; b) seamless and dynamic communication between the simulation models and an object- oriented space-based design environment using the structural homology of various domain representations; and c) "preference-based" performance-to-design mapping technology (bidirectional inference). SEMPER involves the integrated computational modeling of heat transfer, air flow, HVAC system performance, thermal comfort, daylighting and electrical lighting, acoustics, and life-cycle assessment.
series	ACADIA
email
last changed	2022/06/07 07:59

_id	c36d
authors	Mahdavi, A.
year	1999
title	A comprehensive computational environment for performance based reasoning in building design and evaluation
source	Automation in Construction 8 (4) (1999) pp. 427-435
summary	This paper introduces a comprehensive computational implementation effort toward the incorporation of simulation-based performance evaluation in building design. Specifically, the computational design support system `SEMPER' will be described. SEMPER's main objectives are: (i) a methodologically consistent (first-principles-based) and flexible performance modeling approach through the entire building design and engineering process; (ii) provision of comprehensive, i.e., multi-domain building performance evaluation support; (iii) seamless and dynamic communication between the simulation model and the general building representation in an object-oriented space-based design environment; and (iv) active convergence support via a bi-directional inference mechanism that provides not only the conventional design-to-performance mapping option but also a `preference-based' performance-to-design mapping technology.
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	ddss9839
id	ddss9839
authors	Mahdavi, Ardeshir
year	1998
title	A Middle Way to Integration
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	Integration in computer-aided design denotes systematic incorporation of multiple domain applications within a unified computational design support environment. At one end of the spectrum of integration efforts, there is a top-down approach involving an all-encompassing maximal building representation. On the other end, there is bottom-up approach involving the ad hoc and as-needed production of translator and mediator routines to enable various existing applications to communicate with each other. This paper describes the development of a design support system which represents a middle way to integration: while it assumes that, at a fundamental level, some shared notation of the constitutive building entities and their spatial relationships is sine qua non, it assumes that this notation is not a primary necessity, but must be tested against the requirements of the "down-the-line" manipulators of the entities encapsulated by it.
series	DDSS
last changed	2003/08/07 16:36

_id	ddssar0222
id	ddssar0222
authors	Mahdavi, Ardeshir and Gurtekin, Beran
year	2002
title	Shapes, Numbers, Perception: Aspects and Dimensions of the Design-Performance Space
source	Timmermans, Harry (Ed.), Sixth Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings Avegoor, the Netherlands), 2002
summary	The design-performance space denotes a virtual space that can be constructed based on discretized design variables and performance indicators. For an n-dimensional design-performance space, n = d + p,whereby d = the number of discrete design variables, and p = the number of discrete performance indicators. Once constructed, this space can be visualized and used by the designer to explore the relationship between design variables and corresponding performance attributes. We present, for the building design domain, an approach to generation and exploration of the design-performance space. In this approach, an initial design is used to generate a set of alternative designs that collectively constitutethe design space. One way of doing this relies on the "scalarization" of design variables. The scalarization leads to the representation of a building as a point in a d-dimensional design space. Each coordinate ofsuch a space accommodates a salient (semantic or geometric) design variable. Subsequently, the entire corpus of design alternatives is subjected to performance modeling. Based on the modeling results, an ndimensionaldesign-performance space is constructed. We specifically address the potential for and limitations of describing building geometry in terms of a continuous scalar dimension of the design space. We introduce the concept of "Relative Compactness", which is derived by comparing the volume tosurface area ratio of a shape to that of a (compact) reference shape with the same volume. We present the results of an empirical study, which shows a significant correlation between the numeric values of relativecompactness and the subjective evaluation of the compactness of architectural shapes.
keywords	Buildings, design, performance, simulation, geometry
series	DDSS
last changed	2003/08/07 16:36

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