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	ijac20097107
id	ijac20097107
authors	Hadjimitsis, D.G.; Themistocleous, K.; Agapiou, A.; Clayton, C.R.I.
year	2009
title	Monitoring Archaeological Site Landscapes in Cyprus using Multi-temporal Atmospheric Corrected Image Data
source	International Journal of Architectural Computing vol. 7 - no. 1, 121-138
summary	This paper aims to examine the use of satellite remote sensing for monitoring archaeological and more generally cultural heritage sites. For this purpose, multi-temporal data from Landsat 5 TM, Landsat 7 ETM+ and Quickbird images were applied. The paper also discusses the importance of atmospheric correction at the pre-processing step in order to determine true surface reflectance values by removing these effects from satellite images. Atmospheric correction is arguably the most important part of the pre-processing of satellite remotely sensed data and any omission produces erroneous results. The effects of the atmosphere are more severe where dark targets are shown in the satellite image. In the management of cultural heritage sites, since temporal satellite images are required for monitoring purposes, the effect of the atmosphere must be considered. In-situ spectro-radiometric measurements using the GER1500 field spectro-radiometer have been used to assess the reflectance values found after applying the darkest pixel atmospheric correction to the image data. The study area consist the Amathus archaeological site in Limassol and the Nea Paphos archaeological site area located in Paphos district area in Cyprus. Vegetation Index (NDVI) change detection algorithm has been applied to a series of thirteen Landsat TM/ETM+ images of Amathus archaeological site in Limassol. Classification and extraction algorithms have been applied to Landsat TM and Quickbird high resolution images of Nea Paphos archaeological site area.
series	journal
last changed	2009/06/23 08:07

_id	caadria2009_103
id	caadria2009_103
authors	Boeykens, Stefan; Herman Neuckermans
year	2009
title	Content Management Systems Versus Learning Environments
doi	https://doi.org/10.52842/conf.caadria.2009.285
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 285-294
summary	Schools and teachers increasingly apply Online Learning Environments for teaching and course management. In many cases, an existing platform is used to support the curriculum. At the K.U. Leuven in Belgium a campus-wide platform is provided, using a commercial Content Management System. At the same time, the Design and Building Methodology research group at the Department of Architecture, Urbanism and Planning developed a custom portal to organize Computer Aided Architectural Design courses and seminars. Integration of this portal into the university system was rather disappointing, since much of the flexibility and customizability was lost, without any chance of filling in the gaps. This article discusses the possibilities and limitations of existing web-based systems to support Computer Aided Architectural Design teaching and reports on our own experiences from the last decade. A comparison of selected systems is juxtaposed with the requirements derived from these experiences.
keywords	Education; CMS; LMS; CAAD
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	cf2011_p157
id	cf2011_p157
authors	Boton, Conrad; Kubicki Sylvain, Halin Gilles
year	2011
title	Understanding Pre-Construction Simulation Activities to Adapt Visualization in 4D CAD Collaborative Tools
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. 477-492.
summary	Increasing productivity and efficiency is an important issue in the AEC field. This area is mainly characterized by fragmentation, heterogeneous teams with low lifetimes and many uncertainties. 4D CAD is one of the greatest innovations in recent years. It consists in linking a 3D model of the building with the works planning in order to simulate the construction evolution over time. 4D CAD can fill several needs from design to project management through constructivity analysis and tasks planning (Tommelein 2003). The literature shows that several applications have been proposed to improve the 4D CAD use (Chau et al. 2004; Lu et al. 2007; Seok & al. 2009). In addition, studies have shown the real impact of 4D CAD use in construction projects (Staub-French & Khanzode 2007; Dawood & Sika 2007). More recently, Mahalingam et al. (2010) showed that the collaborative use of 4D CAD is particularly useful during the pre-construction phase for comparing the constructability of working methods, for visually identifying conflicts and clashes (overlaps), and as visual tool for practitioners to discuss and to plan project progress. So the advantage of the 4D CAD collaborative use is demonstrated. Moreover, several studies have been conducted both in the scientific community and in the industrial world to improve it (Zhou et al. 2009; Kang et al. 2007). But an important need that remains in collaborative 4D CAD use in construction projects is about the adaptation of visualization to the users business needs. Indeed, construction projects have very specific characteristics (fragmentation, variable team, different roles from one project to another). Moreover, in the AEC field several visualization techniques can represent the same concept and actors choose one or another of these techniques according to their specific needs related to the task they have to perform. For example, the tasks planning may be represented by a Gantt chart or by a PERT network and the building elements can be depicted with a 3D model or a 2D plan. The classical view (3D + Gantt) proposed to all practitioners in the available 4D tools seems therefore not suiting the needs of all. So, our research is based on the hypothesis that adapting the visualization to individual business needs could significantly improve the collaboration. This work relies on previous ones and aim to develop a method 1) to choose the best suited views for performed tasks and 2) to compose adapted multiple views for each actor, that we call ‚Äúbusiness views‚Äù. We propose a 4 steps-method to compose business views. The first step identifies the users‚Äô business needs, defining the individual practices performed by each actor, identifying his business tasks and his information needs. The second step identifies the visualization needs related to the identified business needs. For this purpose, the user‚Äôs interactions and visualization tasks are described. This enables choosing the most appropriate visualization techniques for each need (step 3). At this step, it is important to describe the visualization techniques and to be able to compare them. Therefore, we proposed a business view metamodel. The final step (step 4) selects the adapted views, defines the coordination mechanisms and the interaction principles in order to compose coordinated visualizations. A final step consists in a validation work to ensure that the composed views really match to the described business needs. This paper presents the latest version of the method and especially presents our latest works about its first and second steps. These include making more generic the business tasks description in order to be applicable within most of construction projects and enabling to make correspondence with visualization tasks.
keywords	Pre-construction, Simulation, 4D CAD, Collaboration, Computer Supported Cooperative Work, Human-Computer Interface, Information visualization, Business view, Model driven engineering
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	ijac20097101
id	ijac20097101
authors	Boulaassal, H.; Landes, T.; Grussenmeyer, P.
year	2009
title	Automatic Extraction of Planar Clusters and their Contours on Building Facades Recorded by Terrestrial Laser Scanner
source	International Journal of Architectural Computing vol. 7 - no. 1, 1-20
summary	Since 3D city models need to be realistic not only from a bird's point of view, but also from a pedestrian's point of view, the interest in the generation of 3D façade models is increasing. This paper presents two successive algorithms for automatically segmenting building façades scanned by Terrestrial Laser Scanner (TLS) into planar clusters and extracting their contours. Since majority of façade components are planes, the topic of automatic extraction of planar features has been studied. The RANSAC algorithm has been chosen among numerous methods. It is a robust estimator frequently used to compute model parameters from a dataset containing outliers, as it occurs in TLS data. Nevertheless, the RANSAC algorithm has been improved in order to extract the most significant planar clusters describing the main features composing the building façades. Subsequently, a second algorithm has been developed for extracting the contours of these features. The innovative idea presented in this paper is the efficient way to detect the points composing the contours. In order to evaluate the performances of both algorithms, they have successively been applied on samples with different characteristics, i.e. densities, types of façades and size of architectural details. Finally, a quality evaluation based on the comparison of planar clusters and contours obtained manually has been carried out. The results prove that the proposed algorithms deliver qualitative as well as quantitative satisfactory results and confirm that both algorithms are reliable for the forthcoming 3D modelling of building façades.
series	journal
last changed	2009/06/23 08:07

_id	sigradi2010_197
id	sigradi2010_197
authors	Bustos, L Gabriela I.
year	2010
title	Epistemología compleja de diseño arquitectónico con tecnología digital: primera generación en un taller virtual [Complex epystemology in architecture design with digital technologies: first generation at a virtual workshop]
source	SIGraDi 2010_Proceedings of the 14th Congress of the Iberoamerican Society of Digital Graphics, pp. Bogotá, Colombia, November 17-19, 2010, pp. 197-200
summary	The goal of this paper—part of a doctoral dissertation—is to define a complex epistemology of design that uses digital technology by using Edgar Morin’s study of the theory of complexity to illustrate the concepts of principles and complex paradigms in architectonic design. This paper also establishes the position of digital technology as it is strategically applied in design education in the Architectonic Project I Workshop in the FAD LUZ with participation in Las Americas Virtual Design Studio 2009.
keywords	digital technology, complex epistemology, architectural designs
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	acadia21_444
id	acadia21_444
authors	Crawford, Assia
year	2021
title	Mitochondrial Matrix
doi	https://doi.org/10.52842/conf.acadia.2021.444
source	ACADIA 2021: Realignments: Toward Critical Computation [Proceedings of the 41st Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-986-08056-7]. Online and Global. 3-6 November 2021. edited by B. Bogosian, K. Dörfler, B. Farahi, J. Garcia del Castillo y López, J. Grant, V. Noel, S. Parascho, and J. Scott. 444-453.
summary	The following project was created as part of an art residency with the Wellcome Centre for Mitochondrial Research (WCMR) at Newcastle University. The WCMR specializes in leading-edge research into mitochondrial disease, investigating causes, treatments, and ways of avoiding hereditary transmission. Mitochondria is believed to have started off as a separate species that through symbiosis came to be the powerhouse of each cell in our bodies (Hird 2009). Mitochondrial disease is a genetic disorder that is caused by genetic mutations of the DNA of the mitochondria or the cell that in turn affects the mitochondria (Bolano 2018). Mitochondria is a hereditary condition and can affect people at different stages in their lives. It can affect various organs and has a link to various types of conditions. Therefore, the patient experience is unique to each individual and the elusive nature of the condition can make it particularly challenging due to the complexity of the disorder as well as the inaccessible scale on which these variations occur (Chinnery 2014)
series	ACADIA
type	project
email
last changed	2023/10/22 12:06

_id	acadia23_v3_115
id	acadia23_v3_115
authors	Dade-Robertson, Martyn
year	2023
title	Designing with Agential Matter
source	ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 3: Proceedings of the 43rd Annual Conference for the Association for Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9891764-1-0]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 24-32.
summary	There have been, very broadly, three eras in the understanding of matter in design. The first, associated with an Aristotelian view of matter as inert and as a receptacle of form, has dominated many of the formalisms in Architectural Design from the Renaissance through to Modernism. The second, sometimes described as “new materialism” (Menges 2012), considers matter as active through design processes which work with materials’ inherent tendencies and capacities. This has led to now-familiar design methods, including Material Based Design Computation (Oxman 2009), and many experiments with active materials such as bilayer metals and hygromorphs. These materials can be programmed to respond to their environments and often take inspiration from biology. I want to suggest that we are entering a new era of understanding matter, which I refer to as the “agential era.”
series	ACADIA
type	keynote
email
last changed	2024/04/17 13:59

_id	caadria2009_082
id	caadria2009_082
authors	Fischer, Thomas
year	2009
title	Reassessing rigour, Re-cycling Research
doi	https://doi.org/10.52842/conf.caadria.2009.791
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 791-795
summary	Circular causality, circular logic and subjectivity are rejected by many scientists while some designers regard them as keys to understanding the design process. With this paper I hope to stimulate a discussion about a largely unquestioned foundation of our field: the form of enquiry. Taking (as others before) this form to be circular, I examine the implications of and for research and education. Ideally, this discussion should inspire a new branch in our field: A philosophy of computeraided design research.
keywords	Control; design; science; logic; causality
series	CAADRIA
email
last changed	2022/06/07 07:51

_id	cf2009_487
id	cf2009_487
authors	Gursel, Ipek; Sariyildiz, Sevil; Stouffs, Rudi and Akin, Ömer
year	2009
title	Contextual ontology support as external knowledge representation for building information modelling
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 487- 500
summary	There is an increasing awareness of formal ontologies in knowledge-intense problem domains in the AEC industry. This paper analyzes the general use of ontologies, points to the importance of context-dependent ontology descriptions in AEC, and describes the use and management of multiple (external) ontologies as knowledge management tools within a complex information model of a building performance assessment tool CLIP (Computational support for Lifecycle Integral Performance assessment), previously developed by the authors. The paper provides a discussion of our approach, analysis of the benefits and limitations of external ontologies, suggestions for further development and research areas for the integration of multiple AEC knowledge representations.
keywords	Building lifecycle performance assessment, knowledge modeling, contextual ontologies, product models
series	CAAD Futures
email
last changed	2009/06/08 20:53

_id	ecaade2009_033
id	ecaade2009_033
authors	Jensen, Mads Brath; Mortensen, Henrik Rubæk; Mullins, Michael; Kirkegaard, Poul Henning
year	2009
title	Material Systems: A Design Approach
doi	https://doi.org/10.52842/conf.ecaade.2009.721
source	Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 721-728
summary	This paper describes and reflects upon the results of an investigative project which explores the setting up of a material system – a parametric and generative assembly consisting of and taking into consideration material properties, manufacturing constraints and geometric behavior. The project approaches the subject through the construction of a logic-driven system aiming to explore the possibilities of a material system that fulfills spatial, structural and performative requirements concurrently and how these are negotiated in situations where they might be conflicting.
wos	WOS:000334282200087
keywords	Generative design, design tool development, material systems
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ecaade2009_099
id	ecaade2009_099
authors	Kinayoglu, Gökçe
year	2009
title	Using Audio-Augmented Reality to Assess the Role of Soundscape in Environmental Perception: An Experimental Case Study at UC Berkeley Campus
doi	https://doi.org/10.52842/conf.ecaade.2009.639
source	Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 639-648
summary	Sounds, along with other senses, have a profound influence on our perception of the environment. The multi-modality of perceptual processing is influential in cognitive interpretation, semantic and aesthetic evaluations of environmental scenes. This paper describes an experimental case study using audio-augmented reality, carried out in order to better understand how sound influences sense of place. A correlation is established between soundscape and sense of place that depends on audio-visual congruence based on cultural, aesthetic and semantic factors. Subjective influences of soundscape on place experience are grouped and discussed under 5 areas that were possible to identify: Emotive and synaesthetic effects; effects on attention, gaze and behavior; effects on spatial orientation and sense of scale; influence of audio-visual congruence on sense of place; and perception of personal and social space.
wos	WOS:000334282200077
keywords	Augmented reality, soundscape, environmental perception, place theory, environmental acoustics
series	eCAADe
type	normal paper
email
last changed	2022/06/07 07:52

_id	ecaade2009_162
id	ecaade2009_162
authors	Kontaxakis, Dimitris G.; Papadimitriou, Spiros I.
year	2009
title	The ‘‘Formalization’’ of the In-Formal: Design and Materialization Evolution of ‘Paramana’ Square as a Case Study
doi	https://doi.org/10.52842/conf.ecaade.2009.399
source	Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 399-406
summary	Informal has to do with shifting certainties and the insertion of unexpected, chance and improvisation. The ‘formalization’ of the informal is the subject of this paper; seeking to explore the possibility to have atypical and not rigorous formalizations. But if that is possible until what point informality can be described and designed? By presenting an experimental and realized architectural project we bring forward the necessity of rethinking the concepts of design and construction evolution. There is a strong relation between techniques and the generation, control and construction of complex forms. It is clear that the animation techniques and the dynamic vectorial systems that they are used during the design process played a vital role in the liberation from a pre-conceived typology, as well as in morphing, in controlling, and in materialization of the new that didn’t exist before.
wos	WOS:000334282200048
keywords	Informality, animation techniques, dynamic design systems, optimization, rationalization
series	eCAADe
email
last changed	2022/06/07 07:51

_id	sigradi2009_1006
id	sigradi2009_1006
authors	Kós, José Ripper; Thêmis da Cruz Fagundes; Almir Francisco Reis; Filipe Lima Botelho
year	2009
title	Modelo urbano 3D como instrumento de integração de pesquisas acadêmicas [3D city model as a tool for connecting academic research]
source	SIGraDi 2009 - Proceedings of the 13th Congress of the Iberoamerican Society of Digital Graphics, Sao Paulo, Brazil, November 16-18, 2009
summary	This paper describes the city modeling process of Florianopolis, Brazil, within an architecture graduate program. The model focuses the city urban evolution and aims to integrate different research groups that have Florianopolis as their study object. The process of interpreting historical and other analog data in order to include them into the model becomes a tool to connect research information and stimulate collaboration with researchers who have worked separately. We discuss some tools applied to the modeling process and some research projects that are starting to be embedded in the model.
keywords	Modelo urbano 3D; evolução urbana; práticas colaborativas; Florianópolis
series	SIGRADI
email
last changed	2016/03/10 09:54

_id	ecaade2009_118
id	ecaade2009_118
authors	Li, Andrew I-kang; Chen, Liang; Wang, Yang; Chau, Hau Hing
year	2009
title	Editing Shapes in a Prototype Two- and Three-dimensional Shape Grammar Environment
doi	https://doi.org/10.52842/conf.ecaade.2009.243
source	Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 243-250
summary	Recently we developed a prototype general shape grammar system, called Grammar Environment (Li et al. 2009). It differs from other systems in that it aims to support designers who design with shape grammars. One task of such a system is to support users in editing shapes. The guidelines that we followed in developing Grammar Environment suggested that the shape editing system should both be integrated into the system and be powerful as a drawing tool. This seemed to be contradictory. We decided to make two shape editors: one stronger on integration, the other on drawing power.
wos	WOS:000334282200030
keywords	Shape grammars, shape grammar interpreter, shape grammar environment
series	eCAADe
email
last changed	2022/06/07 07:59

_id	caadria2009_035
id	caadria2009_035
authors	Li, Andrew I-kang; Hau Hing Chau, Liang Chen, Yang Wang
year	2009
title	A Prototype System for developing two- and Three-Dimensional Shape Grammars
doi	https://doi.org/10.52842/conf.caadria.2009.717
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 717-726
summary	A number of researchers have developed shape grammar systems, with a variety of aims. These systems all help users (to varying degrees) to run grammars, but not to develop grammars. However, we believe that developing grammars is also work and needs to be supported. A system to do this would make it easier and more convenient for people using grammars to do design work. Following the generate-test model, we design and implement a prototype system that supports the user in editing grammars, testing grammars, and switching easily between the two types of activity. We emphasize the graphic nature of the task: the user is all the time working with graphic objects, namely shapes.
keywords	Shape grammar; interpreters; development; systems
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	cf2011_p110
id	cf2011_p110
authors	Mcmeel, Dermott
year	2011
title	I think Therefore i-Phone: The influence of Pervasive Media on Collaboration and Multi-Disciplinary Group Work
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. 69-84.
summary	The study of value and its transfer during the multi-disciplinary process of design is stable fodder for research; an entire issue of Design Studies has been devoted to Values in the Design Process. By scrutinising design meetings Dantec (2009) and Ball (2009) separately examine the mechanisms of value transfer between the agents involved in design (clients, designers, engineers). Dantec suggests this is best understood in terms of requirement, values and narrative; Ball proposes it should be viewed as a combination of "analogical reasoning" and "environmental simulation". If we look at Vitruvius and his primary architectural manual (Pollio 1960) we find values‚Äîin the form of firmitas, utilitas and venustas‚Äîembedded in this early codification of architectural practice. However, as much current research is restricted to design practice what occurs when value frameworks move between domains of cultural activity (such as design to construction and vice-versa) is not privileged with a comparably sizable body of research. This paper is concerned with the ongoing usage of pervasive media and cellular phones within communications and value transfer across the disciplinary threshold of design and construction. Through participation in a building project we analyse the subtleties of interaction between analogue communication such as sketches and digitally sponsored communication such as e-mail and mobile phone usage. Analysing the communications between the designer and builder during construction suggests it is also a creative process and the distinctions between design and construction processes are complex and often blurred. This work provides an observational basis for understanding mobile computing as a dynamic ‚Äòtuning‚Äô device‚Äîas hypothesized by Richard Coyne (2010)‚Äîthat ameliorates the brittleness of communication between different disciplines. A follow up study deploys ‚Äòdigital fieldnotes‚Äô (dfn) a bespoke iPhone application designed to test further suppositions regarding the influence exerted upon group working by mobile computing. Within collaboration individual communiqu_©s have different levels of importance depending on the specific topic of discussion and the contributing participant. This project furthers the earlier study; expanding upon what mobile computing is and enabling us to infer how these emergent devices affect collaboration. Findings from these two investigations suggest that the synchronous and asynchronous clamour of analogue and digital tools that surround design and construction are not exclusively inefficiencies or disruptions to be expunged. Observational evidence suggests they may provide contingency and continue to have value attending to the relationship between static components‚Äîand the avoidance of failure‚Äîwithin a complex system such as design and construction.
keywords	collaboration, design, mobile computing, digital media
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	ecaade2009_169
id	ecaade2009_169
authors	Narahara, Taro
year	2009
title	Bottom-up Design Inspired by Evolutionary Dynamics: Adaptable Growth Model for Architecture
doi	https://doi.org/10.52842/conf.ecaade.2009.391
source	Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 391-398
summary	Development of flexible and adaptable architecture has been a perennial theme among practitioners. Design of universal subunits that could tolerate technological, environmental, and circumstantial changes over time is a challenge. In this paper, I would like to introduce several generative design strategies inspired by ideas from evolutionary dynamics and discuss potential benefits of the methods for designs of emerging future building types.
wos	WOS:000334282200047
keywords	Evolutionary dynamics, bottom-up design, DLA
series	eCAADe
email
last changed	2022/06/07 07:58

_id	acadia16_140
id	acadia16_140
authors	Nejur, Andrei; Steinfeld, Kyle
year	2016
title	Ivy: Bringing a Weighted-Mesh Representations to Bear on Generative Architectural Design Applications
doi	https://doi.org/10.52842/conf.acadia.2016.140
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 140-151
summary	Mesh segmentation has become an important and well-researched topic in computational geometry in recent years (Agathos et al. 2008). As a result, a number of new approaches have been developed that have led to innovations in a diverse set of problems in computer graphics (CG) (Sharmir 2008). Specifically, a range of effective methods for the division of a mesh have recently been proposed, including by K-means (Shlafman et al. 2002), graph cuts (Golovinskiy and Funkhouser 2008; Katz and Tal 2003), hierarchical clustering (Garland et al. 2001; Gelfand and Guibas 2004; Golovinskiy and Funkhouser 2008), primitive fitting (Athene et al. 2004), random walks (Lai et al.), core extraction (Katz et al.) tubular multi-scale analysis (Mortara et al. 2004), spectral clustering (Liu and Zhang 2004), and critical point analysis (Lin et al. 20070, all of which depend upon a weighted graph representation, typically the dual of a given mesh (Sharmir 2008). While these approaches have been proven effective within the narrowly defined domains of application for which they have been developed (Chen 2009), they have not been brought to bear on wider classes of problems in fields outside of CG, specifically on problems relevant to generative architectural design. Given the widespread use of meshes and the utility of segmentation in GAD, by surveying the relevant and recently matured approaches to mesh segmentation in CG that share a common representation of the mesh dual, this paper identifies and takes steps to address a heretofore unrealized transfer of technology that would resolve a missed opportunity for both subject areas. Meshes are often employed by architectural designers for purposes that are distinct from and present a unique set of requirements in relation to similar applications that have enjoyed more focused study in computer science. This paper presents a survey of similar applications, including thin-sheet fabrication (Mitani and Suzuki 2004), rendering optimization (Garland et al. 2001), 3D mesh compression (Taubin et al. 1998), morphin (Shapira et al. 2008) and mesh simplification (Kalvin and Taylor 1996), and distinguish the requirements of these applications from those presented by GAD, including non-refinement in advance of the constraining of mesh geometry to planar-quad faces, and the ability to address a diversity of mesh features that may or may not be preserved. Following this survey of existing approaches and unmet needs, the authors assert that if a generalized framework for working with graph representations of meshes is developed, allowing for the interactive adjustment of edge weights, then the recent developments in mesh segmentation may be better brought to bear on GAD problems. This paper presents work toward the development of just such a framework, implemented as a plug-in for the visual programming environment Grasshopper.
keywords	tool-building, design simulation, fabrication, computation, megalith
series	ACADIA
type	paper
email
last changed	2022/06/07 07:58

_id	acadia20_574
id	acadia20_574
authors	Nguyen, John; Peters, Brady
year	2020
title	Computational Fluid Dynamics in Building Design Practice
doi	https://doi.org/10.52842/conf.acadia.2020.1.574
source	ACADIA 2020: Distributed Proximities / Volume I: Technical Papers [Proceedings of the 40th Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 978-0-578-95213-0]. Online and Global. 24-30 October 2020. edited by B. Slocum, V. Ago, S. Doyle, A. Marcus, M. Yablonina, and M. del Campo. 574-583.
summary	This paper provides a state-of-the-art of computational fluid dynamics (CFD) in the building industry. Two methods were used to find this new knowledge: a series of interviews with leading architecture, engineering, and software professionals; and a series of tests in which CFD software was evaluated using comparable criteria. The paper reports findings in technology, workflows, projects, current unmet needs, and future directions. In buildings, airflow is fundamental for heating and cooling, as well as occupant comfort and productivity. Despite its importance, the design of airflow systems is outside the realm of much of architectural design practice; but with advances in digital tools, it is now possible for architects to integrate air flow into their building design workflows (Peters and Peters 2018). As Chen (2009) states, “In order to regulate the indoor air parameters, it is essential to have suitable tools to predict ventilation performance in buildings.” By enabling scientific data to be conveyed in a visual process that provides useful analytical information to designers (Hartog and Koutamanis 2000), computer performance simulations have opened up new territories for design “by introducing environments in which we can manipulate and observe” (Kaijima et al. 2013). Beyond comfort and productivity, in recent months it has emerged that air flow may also be a matter of life and death. With the current global pandemic of SARS-CoV-2, it is indoor environments where infections most often happen (Qian et al. 2020). To design architecture in a post-COVID-19 environment will require an in-depth understanding of how air flows through space.
series	ACADIA
type	paper
email
last changed	2023/10/22 12:06

_id	ijac20097309
id	ijac20097309
authors	Ophir, Yaniv
year	2009
title	Collective Intelligence: An Agent-Based Approach to Programmatic Organization in Architecture
source	International Journal of Architectural Computing vol. 7 - no. 3, 479-499
summary	Architectural programming is the research and decision-making process that identifies the scope of work to be designed. Programming is difficult because it involves identifying, collecting, analyzing and updating information from different sources such as engineers, clients, users, consultants, and others. In this paper I propose a computational model for programming and describe its implementation, a tool called PENA that allows a programming expert to represent different processes and people involved in a project using intelligent agents. By delegating responsibility to agents, a programming expert can better organize and manage project data as well as find creative solutions to conflicting issues through agent negotiation. As a proof-of-concept, I show how an agent, called the Arch-Learner, manages adjacencies of rooms in a simple program for a house by clustering them into public and private rooms. I conclude with a discussion of future work and development of PENA.
series	journal
last changed	2009/10/20 08:02

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