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	cf2011_p033
id	cf2011_p033
authors	Dorta, Tomas; Kalay Yehuda, Lesage Annemarie, Perez Edgar
year	2011
title	Comparing Immersion in Remote and Local Collaborative Ideation Through Sketches: a Case Study
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. 25-40.
summary	Sketches are used in design to support ideation, communication, and collaboration because of their intuitiveness, abstraction, ambiguity and inaccuracy. Design collaboration using freehand sketches is possible through whiteboard software on the Internet. Designers can co-design and share design referents through these tools while adding gestures and expressions using web cams. Freehand sketching using whiteboard software retains the same proportion and scale problems as traditional sketching on paper, but adds digital behaviour (pen tablet display, undo, etc.) and the ability to share sketches in real time with a remote design team. Still, designers are not immersed in their representations. Moreover, such representations can include errors because designers work without reference to real-life perspective views. We developed a system, called the Hybrid Ideation Space (HIS) that allows designers to be immersed in their freehand sketches. The system supports local and remote collaboration, allowing designers to be literally inside their life sized, real time representations, while sharing them with remote collaborators who use another HIS. This paper presents a case study comparing the HIS to conventional whiteboard software (Vyew™) in a context of local and remote design collaboration on two landscape architecture projects. Two multidisciplinary teams worked on the first steps of two ad-hoc projects. The goal was to make an initial observation of the impact of immersion and see if it delivers benefits to collaborative ideation. Two methodological tools supported the study: the Design Flow for the experience that includes the NASA TLX to measure the workload, and the Collaborative Ideation Loop (CI-Loop) for design collaboration.
keywords	Collaboration, ideation, immersion, sketches, whiteboard
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	acadia11_216
id	acadia11_216
authors	Dorta, Tomás; Kalay, Yehuda; Lesage, Annemarie; Pérez, Edgar
year	2011
title	Comparing Immersion in Collaborative Ideation through Design Conversations, Workload and Experience
doi	https://doi.org/10.52842/conf.acadia.2011.216
source	ACADIA 11: Integration through Computation [Proceedings of the 31st Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA)] [ISBN 978-1-6136-4595-6] Banff (Alberta) 13-16 October, 2011, pp. 216-225
summary	This paper presents a case study comparing the HIS (Hybrid Ideation Space), a system allowing designers to be physically immersed in their sketches and physical models, and Vyew™, a whiteboard software, in local and remote design collaboration; aiming to see if immersion benefits collaborative ideation. Three methodological tools were used: Design Conversations (Collaborative Ideation Loop “CI-Loop”, Collaborative Conversations “CC” and Collaborative Moving “CM”), Workload using NASA TLX and Design Flow for the designers’ experience. Local collaboration results appear to have benefited from immersion while remote results were mitigated by participant issues. However, looking deeper into users’ experience explains the impact of immersion.
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:55

_id	caadria2011_026
id	caadria2011_026
authors	Dorta, Tomás; Yehuda Kalay, Annemarie Lesage and Edgar Pérez
year	2011
title	First steps of the augmented design studio: The interconnected Hybrid Ideation Space and the CI Loop
doi	https://doi.org/10.52842/conf.caadria.2011.271
source	Proceedings of the 16th International Conference on Computer Aided Architectural Design Research in Asia / The University of Newcastle, Australia 27-29 April 2011, pp. 271-280
summary	Professional or school design studios are essential environments for design supporting free exploration of materials and representations, analogue or digital. New technologies have moved into the studio with mixed results. Paradoxically, the use of portable computers, using Internet as collaboration channel, has actually individualized the design work and limited the support to co-creation, reinforcing individual work. The Augmented Design Studio argues for the implementation of hybrid technology, such as the Hybrid Ideation Space (HIS), in the design studio to compensate for the absence of collective local or remote efficient ideation space. This paper presents a case study showing the primary results of distant synchronous and asynchronous design collaboration supported by the interconnected HIS during an ad-hoc project and assessed by the improved Collaborative Ideation Loop (CI Loop) methodology. The HIS was installed in two universities located in different countries. We ran a research protocol in the format of a design charrette where two teams (team a: two architecture students, team b: two industrial design students) participated in the ideation of a bus shelter. This case study shows that teams were able to co-design while they were virtually “teleported” into each other’s representations.
keywords	Design studio; hybrid approach; Collaborative Ideation Loop; telepresence; Hybrid Ideation Space
series	CAADRIA
email
last changed	2022/06/07 07:55

_id	sigradi2011_131
id	sigradi2011_131
authors	Dorta, Tomás; Kalay, Yehuda; Pérez, Edgar; Lesage, Annemarie; Calvo, Ignacio
year	2011
title	Conversaciones de diseño en el HIS interconectado [Design conversations in the interconnected HIS]
source	SIGraDi 2011 [Proceedings of the 15th Iberoamerican Congress of Digital Graphics] Argentina - Santa Fe 16-18 November 2011, pp. 495-499
summary	To ideate, to exteriorize a concept, designers talk and put qualitative and ambiguous mental images in external representations. Verbalization on its own or combined with these representations drives ideation. This paper presents in detail the different elements of the design conversation in a remote setting: Collaborative Ideation Loops, Collaborative Conversations and Collaborative Moving. They occurred while using the interconnected Hybrid Ideation Space (HIS) in the context of a multidisciplinary ad-hoc project between two universities. This case study shows the relevance in particular of these elements of design conversations, as methodological tools to better assess and understand the collaborative ideation process.
series	SIGRADI
email
last changed	2016/03/10 09:50

_id	ecaade2011_013
id	ecaade2011_013
authors	Fleischmann, Moritz; Lienhard, Julian; Menges, Achim
year	2011
title	Computational Design Synthesis: Embedding Material Behaviour in Generative Computational Processes
doi	https://doi.org/10.52842/conf.ecaade.2011.759
source	RESPECTING FRAGILE PLACES [29th eCAADe Conference Proceedings / ISBN 978-9-4912070-1-3], University of Ljubljana, Faculty of Architecture (Slovenia) 21-24 September 2011, pp.759-767
summary	This paper presents strategies for the design of bending-active structures through the introduction of modern computational design methods, exploring their architectural potential through contemporary means of design, engineering and robotic manufacturing. As a case study the ICD/ITKE research pavilion’s information modeling process is depicted: how form-finding experiments guided the development of various models that synthesize data for design, simulation, analysis and fabrication. The paper explains the integration of relevant material information into generative computational design processes and concludes by comparing the resultant data models with a scan of the built prototype.
wos	WOS:000335665500088
keywords	Computational Design; Bending-Active Structures; Robotic Fabrication; Computer-Aided Manufacturing; Information Modeling
series	eCAADe
email
last changed	2022/05/01 23:21

_id	cf2011_p049
id	cf2011_p049
authors	Hii Jun Chung, Daniel; Chye Kiang Heng, Lai Choo Malone Lee, Ji Zhang
year	2011
title	Analyzing the Ventilation Performance of Tropical High Density Residential Precincts using Computational Fluid Dynamics
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. 351-366.
summary	Major cities in the world are getting bigger as they continue to grow to cater for more population increase. These cities normally forced the urban planning to go high density. In the tropical context, high density cities like Singapore and Hong Kong do not have the luxury of space to go low rise and compact. These cities have to build to the floor area ratio of 4 and above to cater for the population. Their only solution is to go up, as high as possible, to the extent that the natural wind flow pattern will be altered, which brings environmental impact to the people. This is generally not good since wind flow helps to maintain the thermal comfort of the people as heat and pollutants are being channeled out of the city to avoid Urban Heat Island effect. In the tropical context, wind flow is crucial to maintain people‚Äôs comfort as the temperature is generally very high from the exposure of the sun for the entire year. Studies have shown that wind flow plays the most significant part in maintaining human comfort despite exposing to direct sunlight in the tropics. Therefore, wind flow analysis is extremely crucial to make the design sustainable and energy efficient, as people will not have to depend on mechanical ventilation to compensate for the lack of wind flow. Computational Fluid Dynamics (CFD) has always been used in the field of architecture, urban design and urban planning to understand the patterns of wind flow through the built environment apart from wind tunnel tests. The availability of more powerful hardware for the mainstream computer users as well as the lowering costs of these computers made CFD more possible to be adopted in the design world today. This also means using CFD in the design process, especially to analyze the impact of the design to the current site conditions and annual wind patterns will help the new design to be more responsive to the site. The interest of this paper is to analyze the high density typologies to see how well they respond to the local wind flow pattern. A typology is considered acceptable when the wind flow going through the site is still maintaining acceptable wind speed. This means it does not block off the wind and create stagnant spaces. Different designs generate different typologies which will respond differently to the wind pattern. The study aims at comparing the local high density typologies in terms of their response to the wind. Changes to a typology can be explored too to see if the performance will be different. For a typology which is considered a total failure in terms of response to wind, it may improve its performance if the orientation is altered. The CFD software can also parametrically respond to the changes of the typologies‚Äô dimensions. This is helpful to see how much more a typology can still be performing well before failure by increasing the floor area index. The easiest way to do this is to pump up the building height. In conclusion, designing in response to wind is extremely important as it is more sustainable and responsive to Urban Heat Island effect. A design which responds well to the wind patterns will help save cost of cooling load and fan expenditure. The people will also be more willing to use the outdoor spaces which will as a whole generate more vibrant city spaces. As a result, a high density city with huge population count can still enjoy good thermal comfort if the general urban planning and design respond well to wind.
keywords	computational fluid dynamics, sustainability, high density, urban design, airflow, ventilation
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	caadria2011_028
id	caadria2011_028
authors	Lesage, Annemarie and Tomás Dorta
year	2011
title	Two conceptual design tools and an immersive experience: Beyond the pragmatic-pleasurable split in UX
doi	https://doi.org/10.52842/conf.caadria.2011.291
source	Proceedings of the 16th International Conference on Computer Aided Architectural Design Research in Asia / The University of Newcastle, Australia 27-29 April 2011, pp. 291-300
summary	In a recent study, we compared two conceptual design tools supporting collaboration, a whiteboard software accessed through Internet, and a hybrid immersive system, the Hybrid Ideation Space (HIS). The result of the study appeared to favour the HIS because of its immersive qualities. In this paper, we seek possible explanations as to why immersion delivered a better experience, by looking at the mental workload in relationship to the experience. For the workload we rely on Wickens’ four-dimensional multiple resource model, specifically processing codes (verbal/spatial) and visual channels; and for the experience, Csikszentmihalyi’s concept of flow and our own concept of Design Flow. The designers seemed to be responding to different styles of information processing required of them by each tool, one being more experiential and the other requiring a heavier mental workload. Insight in the cognitive underpinning of a strictly pragmatic immersive experience suggests that UX has also to do with how the information is received and processed by users, without isolating the functional from the rest of the experience.
keywords	User experience; immersion; flow; mental workload; Hybrid Ideation Space
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	ijac201310105
id	ijac201310105
authors	Agkathidis, Asterios and Andre_ Brown
year	2013
title	Tree-Structure Canopy:A Case Study in Design and Fabrication of Complex Steel Structures using Digital Tools
source	International Journal of Architectural Computing vol. 11 - no. 1, 87-104
summary	This paper describes and reflects on the design and manufacturing process of the Tree-Structure canopy for the WestendGate Tower in Frankfurt upon Main, completed early 2011.The project investigated fabrication and assembly principles of complex steel structures as well as the integration of contemporary computational design, engineering, optimization and simulation techniques in a collaborative design approach. This paper focuses on the notion of modular standardization as opposed to non standard customized components. It also engages with issues relating to digital production tools and their impact on construction cost, material performance and tolerances. In addition it examines the reconfiguration of liability during a planning and construction process, an aspect which can be strongly determined by fabrication companies rather than the architect or designer.This paper is written as a reflection on the complete building process when contemporary digital tools are used from design through to fabrication. It studies both the generation of the steel structure as well the ETFE cushion skin. It reports on a collaborative project, where the main author was responsible for the canopies design, parameterization, digitalization and fabrication, as well as for the dissemination of the outcomes and findings during the design and realization process.As such it represents an example of research through design in a contemporary and evolving field.The canopy received a design award by the Hellenic Architecture Association.
series	journal
last changed	2019/05/24 09:55

_id	cf2011_p051
id	cf2011_p051
authors	Cote, Pierre; Mohamed-Ahmed Ashraf, Tremblay Sebastien
year	2011
title	A Quantitative Method to Compare the Impact of Design Mediums on the Architectural Ideation Process.
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. 539-556.
summary	If we compare the architectural design process to a black box system, we can assume that we now know quite well both inputs and outputs of the system. Indeed, everything about the early project either feasibility studies, programming, context integration, site analysis (urban, rural or natural), as well as the integration of participants in a collaborative process can all be considered to initiate and sustain the architectural design and ideation process. Similarly, outputs from that process are also, and to some extent, well known and identifiable. We are referring here, among others, to the project representations or even to the concrete building construction and its post-evaluation. But what about the black box itself that produces the ideation. This is the question that attempts to answer the research. Currently, very few research works linger to identify how the human brain accomplishes those tasks; how to identify the cognitive functions that are playing this role; to what extent they operate and complement each other, and among other things, whether there possibly a chain of causality between these functions. Therefore, this study proposes to define a model that reflects the activity of the black box based on the cognitive activity of the human brain. From an extensive literature review, two cognitive functions have been identified and are investigated to account for some of the complex cognitive activity that occurs during a design process, namely the mental workload and mental imagery. These two variables are measured quantitatively in the context of real design task. Essentially, the mental load is measured using a Bakan's test and the mental imagery with eyes tracking. The statistical software G-Power was used to identify the necessary subject number to obtain for significant variance and correlation result analysis. Thus, in the context of an exploratory research, to ensure effective sample of 0.25 and a statistical power of 0.80, 32 participants are needed. All these participants are students from 3rd, 4th or 5th grade in architecture. They are also very familiar with the architectural design process and the design mediums used, i.e., analog model, freehand drawing and CAD software, SketchUp. In three experimental sessions, participants were asked to design three different projects, namely, a bus shelter, a recycling station and a public toilet. These projects were selected and defined for their complexity similarity, taking into account the available time of 22 minutes, using all three mediums of design, and this in a randomly manner to avoid the order effect. To analyze the two cognitive functions (mental load and mental imagery), two instruments are used. Mental imagery is measured using eye movement tracking with monitoring and quantitative analysis of scan paths and the resulting number and duration of participant eye fixations (Johansson et al, 2005). The mental workload is measured using the performance of a modality hearing secondary task inspired by Bakan'sworks (Bakan et al.; 1963). Each of these three experimental sessions, lasting 90 minutes, was composed of two phases: 1. After calibrating the glasses for eye movement, the subject had to exercise freely for 3 minutes while wearing the glasses and headphones (Bakan task) to get use to the wearing hardware. Then, after reading the guidelines and criteria for the design project (¬± 5 minutes), he had 22 minutes to execute the design task on a drawing table allowing an upright posture. Once the task is completed, the subject had to take the NASA TLX Test, on the assessment of mental load (¬± 5 minutes) and a written post-experimental questionnaire on his impressions of the experiment (¬± 10 minutes). 2. After a break of 5-10 minutes, the participant answered a psychometric test, which is different for each session. These tests (¬± 20 minutes) are administered in the same order to each participant. Thus, in the first experimental session, the subject had to take the psychometric test from Ekstrom et al. (1978), on spatial performance (Factor-Referenced Cognitive Tests Kit). During the second session, the cognitive style is evaluated using Oltman's test (1971). Finally, in the third and final session, participant creativity is evaluated using Delis-Kaplan test (D-KEFS), Delis et al. (2001). Thus, this study will present the first results of quantitative measures to establish and validate the proposed model. Furthermore, the paper will also discuss the relevance of the proposed approach, considering that currently teaching of ideation in ours schools of architecture in North America is essentially done in a holistic manner through the architectural project.
keywords	design, ideation process, mental workload, mental imagery, quantitative mesure
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	acadiaregional2011_009
id	acadiaregional2011_009
authors	Esquivel, Gabriel; Ryan Collier
year	2011
title	A Swell Project: Between Parametrics and Fabrication
doi	https://doi.org/10.52842/conf.acadia.2011.x.r0r
source	Parametricism (SPC) ACADIA Regional 2011 Conference Proceedings
summary	As a case study, Swell serves as: 1) an investigation into architectural ornamentation using a contemporary framework, as directed through specific modes of research, 2) a study in fabrication materials and methods, especially through the realization of form, and 3) as a pedagogical tool, loosely assembled through real and virtual space. This essay will focus mainly on the fabrication methods in terms of why and the pedagogical research initiatives and reactions that went into the design of Swell. The project was conceived through a summer studio which was formed to investigate tools and methods available at the Texas A&M Architecture Ranch and to further the local pedagogical direction toward fabrication in architectural design at Texas A&M University as a whole. That is to say, there was no specific agenda toward parametrics, form, research, technology, or the like. At the same time, as the research continued, certain decisions were cast in terms of technology, sensibility, site, etc. informed by research, iterative processes, or parametric evaluation that ultimately formed the project as it exists today.
series	ACADIA
last changed	2022/06/07 07:49

_id	acadia11_372
id	acadia11_372
authors	James, Anne; Nagasaka, Dai
year	2011
title	Integrative Design Strategies for Multimedia in Architecture
doi	https://doi.org/10.52842/conf.acadia.2011.372
source	ACADIA 11: Integration through Computation [Proceedings of the 31st Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA)] [ISBN 978-1-6136-4595-6] Banff (Alberta) 13-16 October, 2011, pp. 372-379
summary	Multidisciplinary efforts that have shaped the current integration of multimedia into architectural spaces have primarily been conducted by collaborative efforts among art, engineering, interaction design, informatics and software programming. These collaborations have focused on the complexities of designing for applications of multimedia in specific real world contexts. Outside a small but growing number of researchers and practitioners, architects have been largely absent from these efforts. This has resulted in projects that deal primarily with developing technologies augmenting existing architectural environments. (Greenfield and Shepard 2007)This paper examines the potential of multimedia and architecture integration to create new possibilities for architectural space. Established practices of constructing architecture suggest creating space by conventional architectural means. On the other hand, multimedia influences and their effect on the tectonics, topos and typos (Frampton 2001) of an architectural space (‘multimedia effects matrix’) suggest new modes of shaping space. It is proposed that correlations exist between those two that could inform unified design strategies. Case study analyses were conducted examining five works of interactive spaces and multimedia installation artworks, selected from an initial larger study of 25 works. Each case study investigated the means of shaping space employed, according to both conventional architectural practices and the principles of multimedia influence (in reference to the ‘multimedia effects matrix’) (James and Nagasaka 2010, 278-285). Findings from the case studies suggest strong correlations between the two approaches to spatial construction. To indicate these correlations, this paper presents five speculative integrative design strategies derived from the case studies, intended to inform future architectural design practice.
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:52

_id	ijac20109302
id	ijac20109302
authors	Williams, Nicholas; Hanno Stehling, Fabian Scheurer, Silvan Oesterle, Matthias Kohler, Fabio Gramazio
year	2011
title	A Case Study of a Collaborative Digital Workflow in the Design and Production of Formwork for ‘Non-Standard’ Concrete Structures
source	International Journal of Architectural Computing vol. 9 - no. 3, 223-240
summary	This paper presents an overview of ongoing research from within the Tailorcrete research project into the development of CAD tools for the design and realization of ‘non-standard’ concrete structures. The focus is on concrete formwork, a significant factor affecting cost, logistics and aesthetics. With a process spanning a broad range of expertise, collaboration through an effective digital workflow is vital to the successful execution of such structures. As a concept for this workflow, a working model of a Design System is described and its development discussed. This focuses on three aspects: (1) the identification of key Use-Cases; (2) the definition of Formwork Systems; and (3) the definition of communication between software elements to provide relevant means of collaboration for expert users. An implementation as a package of software prototypes is also briefly presented. This includes a Base Framework, tools targeting Use-Cases and components relating to specific formwork systems.
series	journal
last changed	2019/05/24 09:55

_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	cf2011_p075
id	cf2011_p075
authors	Janssen, Patrick; Chen Kian Wee
year	2011
title	Visual Dataflow Modelling: A Comparison of Three Systems
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. 801-816.
summary	Visual programming languages enable users to create computer programs by manipulating graphical elements rather than by entering text. The difference between textual languages and visual languages is that most textual languages use a procedural programming model, while most visual languages use a dataflow programming model. When visual programming is applied to design, it results in a new modelling approach that we refer to 'visual dataflow modelling' (VDM). Recently, VDM has becoming increasingly popular within the design community, as it can accelerate the iterative design process, thereby allowing larger numbers of design possibilities to be explored. Furthermore, it is now also becoming an important tool in performance-based design approaches, since it may potentially enable the closing of the loop between design development and design evaluation. A number of CAD systems now provide VDM interfaces, allowing designers to define form generating procedures without having to resort to scripting or programming. However, these environments have certain weaknesses that limit their usability. This paper will analyse these weaknesses by comparing and contrasting three VDM environments: McNeel Grasshopper, Bentley Generative Components, and Sidefx Houdini. The paper will focus on five key areas: * Conditional logic allow rules to be applied to geometric entities that control how they behave. Such rules will typically be defined as if-then-else conditions, where an action will be executed if a particular condition is true. A more advanced version of this is the while loop, where the action within the loop will be repeatedly executed while a certain condition remains true. * Local coordinate systems allow geometric entities to be manipulated relative to some convenient local point of reference. These systems may be either two-dimensional or three-dimensional, using either Cartesian, cylindrical, or spherical systems. Techniques for mapping geometric entities from one coordinate system to another also need to be considered. * Duplication includes three types: simple duplication, endogenous duplication, and exogenous duplication. Simple duplication consists of copying some geometric entity a certain number of times, producing identical copies of the original. Endogenous duplication consist of copying some geometric entity by applying a set of transformations that are defined as part of the duplication process. Lastly, exogenous duplication consists of copying some geometric entity by applying a set of transformations that are defined by some other external geometry. * Part-whole relationships allow geometric entities to be grouped in various ways, based on the fundamental set-theoretic concept that entities can be members of sets, and sets can be members of other sets. Ways of aggregating data into both hierarchical and non-hierarchical structures, and ways of filtering data based on these structures need to be considered. * Spatial queries include relationships between geometric entities such as touching, crossing, overlapping, or containing. More advanced spatial queries include various distance based queries and various sorting queries (e.g. sorting all entities based on position) and filtering queries (e.g. finding all entities with a certain distance from a point). For each of these five areas, a simple benchmarking test case has been developed. For example, for conditional logic, the test case consists of a simple room with a single window with a condition: the window should always be in the longest north-facing wall. If the room is rotated or its dimensions changed, then the window must re-evaluate itself and possibly change position to a different wall. For each benchmarking test-case, visual programs are implemented in each of the three VDM environments. The visual programs are then compared and contrasted, focusing on two areas. First, the type of constructs used in each of these environments are compared and contrasted. Second, the cognitive complexity of the visual programming task in each of these environments are compared and contrasted.
keywords	visual, dataflow, programming, parametric, modelling
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	ecaade2011_112
id	ecaade2011_112
authors	Wurzer, Gabriel; Alaçam, Sema; Lorenz, Wolfgang
year	2011
title	How to Teach Architects (Computer) Programming: A Case Study
doi	https://doi.org/10.52842/conf.ecaade.2011.051
source	RESPECTING FRAGILE PLACES [29th eCAADe Conference Proceedings / ISBN 978-9-4912070-1-3], University of Ljubljana, Faculty of Architecture (Slovenia) 21-24 September 2011, pp.51-56
summary	Computer programming in architecture seems to be commonplace throughout the eCAADe Community. Yet, a critical evaluation of a programming course as seen from a student’s side is still missing. During a week-long programming workshop in a fellow university, we have been assessing subjective parameters such as mood, quality of presentation and comprehensibility, comparing these to the actual topics that were covered at this instance. Our results contribute to understanding architecture students in their quest towards algorithmical thinking. We are convinced that the discussion given in this paper will help other teachers to further increase the quality of their lectures. Furthermore, the structure of our approach may serve as basis for further research into recording student behavior during programming courses.
wos	WOS:000335665500004
keywords	Teaching; Programming; Assessment
series	eCAADe
email
last changed	2022/05/01 23:21

_id	cf2011_p109
id	cf2011_p109
authors	Abdelmohsen, Sherif; Lee Jinkook, Eastman Chuck
year	2011
title	Automated Cost Analysis of Concept Design BIM Models
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. 403-418.
summary	AUTOMATED COST ANALYSIS OF CONCEPT DESIGN BIM MODELS Interoperability: BIM models and cost models This paper introduces the automated cost analysis developed for the General Services Administration (GSA) and the analysis results of a case study involving a concept design courthouse BIM model. The purpose of this study is to investigate interoperability issues related to integrating design and analysis tools; specifically BIM models and cost models. Previous efforts to generate cost estimates from BIM models have focused on developing two necessary but disjoint processes: 1) extracting accurate quantity take off data from BIM models, and 2) manipulating cost analysis results to provide informative feedback. Some recent efforts involve developing detailed definitions, enhanced IFC-based formats and in-house standards for assemblies that encompass building models (e.g. US Corps of Engineers). Some commercial applications enhance the level of detail associated to BIM objects with assembly descriptions to produce lightweight BIM models that can be used by different applications for various purposes (e.g. Autodesk for design review, Navisworks for scheduling, Innovaya for visual estimating, etc.). This study suggests the integration of design and analysis tools by means of managing all building data in one shared repository accessible to multiple domains in the AEC industry (Eastman, 1999; Eastman et al., 2008; authors, 2010). Our approach aims at providing an integrated platform that incorporates a quantity take off extraction method from IFC models, a cost analysis model, and a comprehensive cost reporting scheme, using the Solibri Model Checker (SMC) development environment. Approach As part of the effort to improve the performance of federal buildings, GSA evaluates concept design alternatives based on their compliance with specific requirements, including cost analysis. Two basic challenges emerge in the process of automating cost analysis for BIM models: 1) At this early concept design stage, only minimal information is available to produce a reliable analysis, such as space names and areas, and building gross area, 2) design alternatives share a lot of programmatic requirements such as location, functional spaces and other data. It is thus crucial to integrate other factors that contribute to substantial cost differences such as perimeter, and exterior wall and roof areas. These are extracted from BIM models using IFC data and input through XML into the Parametric Cost Engineering System (PACES, 2010) software to generate cost analysis reports. PACES uses this limited dataset at a conceptual stage and RSMeans (2010) data to infer cost assemblies at different levels of detail. Functionalities Cost model import module The cost model import module has three main functionalities: generating the input dataset necessary for the cost model, performing a semantic mapping between building type specific names and name aggregation structures in PACES known as functional space areas (FSAs), and managing cost data external to the BIM model, such as location and construction duration. The module computes building data such as footprint, gross area, perimeter, external wall and roof area and building space areas. This data is generated through SMC in the form of an XML file and imported into PACES. Reporting module The reporting module uses the cost report generated by PACES to develop a comprehensive report in the form of an excel spreadsheet. This report consists of a systems-elemental estimate that shows the main systems of the building in terms of UniFormat categories, escalation, markups, overhead and conditions, a UniFormat Level III report, and a cost breakdown that provides a summary of material, equipment, labor and total costs. Building parameters are integrated in the report to provide insight on the variations among design alternatives.
keywords	building information modeling, interoperability, cost analysis, IFC
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	ascaad2016_046
id	ascaad2016_046
authors	Albarakat, Reem; Gehan Selim
year	2016
title	Radicalism vs. Consistency - The Cyber Influence on Individuals’ Non-Routine Uses in the Heritage Public Spaces of Cairo
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 451-460
summary	Since the emergence of the concept of user-generated content websites – Web 2.0, Internet communications have developed as a powerful personal and social phenomenon. Many Internet applications have become partially or entirely related to the concept of social network; and cyberspace has become a space about ‘us’ not ‘where’ we are. This paper investigates the theoretical grounds of the effect of cyber experience on changing the individuals’ uses of the public spaces, and sustaining this change through maintaining the ties and reciprocal influence between actions in physical and cyber spaces. It aims at examining the impact of cyber territories on the perception, definition and effectiveness of personal space within different circumstances; and its role in changing the uses of spaces where people used to act habitually. The personal space, here, will be represented as the core of both: change and consistency – the space of bridging the reciprocal effect of cyber and physical counterparts, which is transformed through the experience of physical events mediated into the cyberspace. The paper is part of a study which looks at the case of Tahrir Square during the Egyptian political movement in 2011. We will compare the activists’ actions and practices in the Square during different events of non-routine use of the square and its surroundings. The case study will show the level of consistency in the features of the produced personal space within different waves of the revolutionary actions for all that different circumstances, motivations and results.
series	ASCAAD
email
last changed	2017/05/25 13:33

_id	caadria2011_032
id	caadria2011_032
authors	Barker, Tom; Nicole Gardner, M. Hank Haeusler and Martin Tomitsch
year	2011
title	Last train to trancentral: From infrastructure to ‘info’structure: a case study of embedding digital technology into existing public transport infrastructures
doi	https://doi.org/10.52842/conf.caadria.2011.335
source	Proceedings of the 16th International Conference on Computer Aided Architectural Design Research in Asia / The University of Newcastle, Australia 27-29 April 2011, pp. 335-344
summary	The research presented in this paper is an investigation into how ubiquitous computing technologies can contribute to improving the quality of existing public transport environments through the integration of responsive technologies. The paper argues that given the significant challenges associated with transport infrastructure expansion including cost, disruption, energy use, and implementation periods augmenting existing transport environments offers alternate measures to manage demand and improve the user experience. The paper proposes improving transport environments by integrating smart, or responsive, digital information into the existing physical fabric in a coherent architectural and spatial context. This approach offers an opportunity to shift away from the static nature of public transport infrastructure to the dynamic notion of public transport ‘info’structure. The research uses an architecture graduate studio as a foundation to investigate the objectives. The contribution of this paper is an investigation of ways in which digital technologies and networked communications can transform and augment public transport infrastructure, allowing new forms of intelligent, adaptive, interactive and self-aware architecture to be developed.
keywords	Urban Informatics; media facades; public transport; responsive technologies; smart environments
series	CAADRIA
email
last changed	2022/06/07 07:54

_id	cf2011_p098
id	cf2011_p098
authors	Bernal, Marcelo; Eastman Charles
year	2011
title	Top-down Approach for Interaction of Knowledge-Based Parametric Objects and Preliminary Massing Studies for Decision Making in Early Design Stages
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. 149-164.
summary	Design activities vary from high-degree of freedom in early concept design stages to highly constrained solution spaces in late ones. Such late developments entail large amount of expertise from technical domains. Multiple parallel models handle different aspects of a project, from geometric master models to specific building components. This variety of models must keep consistency with the design intent while they are dealing with specific domains of knowledge such as architectural design, structure, HVAC, MEP, or plumbing systems. Most of the expertise embedded within the above domains can be translated into parametric objects by capturing design and engineering knowledge through parameters, constraints, or conditionals. The aim of this research is capturing such expertise into knowledge-based parametric objects (KPO) for re-usability along the design process. The proposed case study ‚Äì provided by SOM New York‚ is the interaction between a massing study of a high-rise and its building service core, which at the same time handles elevators, restrooms, emergency stairs, and space for technical systems. This project is focused on capturing design expertise, involved in the definition of a building service core, from a high-rise senior designer, and re-using this object for interaction in real-time with a preliminary massing study model of a building, which will drive the adaption process of the service core. This interaction attempts to provide an integrated design environment for feedback from technical domains to early design stages for decision-making, and generate a well-defined first building draft. The challenges addressed to drive the instantiation of the service core according to the shifting characteristics of the high-rise are automatic instantiation and adaptation of objects based on decision rules, and updating in real-time shared parameters and information derived from the high-rise massing study. The interaction between both models facilitates the process from the designer‚Äôs perspective of reusing previous design solutions in new projects. The massing study model is the component that handles information from the perspective of the outer shape design intent. Variations at this massing study model level drive the behavior of the service core model, which must adapt its configuration to the shifting geometry of the building during design exploration in early concept design stages. These variations depend on a list of inputs derived from multiple sources such as variable lot sizes, building type, variable square footage of the building, considerations about modularity, number of stories, floor-to-floor height, total building height, or total building square footage. The shifting combination of this set of parameters determines the final aspect of the building and, consequently, the final configuration of the service core. The service core is the second component involved in the automatic generation of a building draft. In the context of BIM, it is an assembly of objects, which contains other objects representing elevators, restrooms, emergency stairs, and space for several technical systems. This assembly is driven by different layouts depending on the building type, a drop-off sequence, which is the process of continuous reduction of elevators along the building, and how this reduction affects the re-arrangement of the service core layout. Results from this research involves a methodology for capturing design knowledge, a methodology for defining the architecture of smart parametric objects, and a method for real-time-feedback for decision making in early design stages. The project also wants to demonstrate the feasibility of continuous growth on top of existing parametric objects allowing the creation of libraries of smart re-usable objects for automation in design.
keywords	design automation, parametric modeling, design rules, knowledge-based design
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	sigradi2011_366
id	sigradi2011_366
authors	Braida, Frederico; Nonima, Vera L.
year	2011
title	A representação das cidades na era da cultura digital: ampliação, consumo e produção das cidades no ciberespaço [The representation of cities in the era of digital culture: expansion, consumption and production of cities in cyberspace ]
source	SIGraDi 2011 [Proceedings of the 15th Iberoamerican Congress of Digital Graphics] Argentina - Santa Fe 16-18 November 2011, pp. 320-323
summary	This article presents a study on the representation of cities in the era of digital culture and aims to show how the phenomenon of self-production is present in the websites studied. At the end, we conclude that cities (through city marketing), local government (through advertising and through the creation of an identity) and citizens (through selfbranding), they create a rhetorical itself and constitute itself as brands. Therefore, we conclude that cybercities has been more an extended space of consumption and production of cities, municipalities and citizens.
series	SIGRADI
email
last changed	2016/03/10 09:47

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