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	sigradi2009_1008
id	sigradi2009_1008
authors	Silva, Isabel Cristina Siqueira da; Vinicius de Moraes Netto; Carla Maria Dal Sasso Freitas
year	2009
title	Novos Caminhos para Simulação Urbana: Integrando Métodos de Visualização de Informações e Modelagem de Agentes e Redes Espaciais [Integrating Information Visualization methods in an agent-based approach to urban simulation]
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 defines paths into the integration of urban simulation and new methods of Information Visualization (IV) first observing the current state of IV methods in general, and visualization in urban modelling and simulation in particular. Secondly, it proposes a set of issues where progress in forms of integrating IV methods into urban simulation techniques can be made – namely, through the concept of ontologies (rules of relations between categories of objects and information) – in stages like problem definition and analysis, information processing and the generation of user-friendly graphic outputs for simulated scenarios and analyses.
keywords	Visualização de Informações; Urbanismo; Ontologias
series	SIGRADI
email
last changed	2016/03/10 10:00

_id	cf2009_833
id	cf2009_833
authors	Chen, Chiung-Hui
year	2009
title	An agent-based street simulator
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 833- 846
summary	This paper aims to study interactions between a behavioral model of pedestrians and urban spaces, and regards micro-scale urban spaces as its target. This paper suggests constructing and analyzing a pedestrian behavioral model using the “Attention Theory”, and introducing the rules and attributes of agent behavior oriented simulation. Based on the validation of actual street cases, the findings show that the pedestrians can be represented by an agent program, and behavioral reactions of walking agents under different stimulus can be further simulated.
keywords	Agent, attention, behavior, simulation
series	CAAD Futures
email
last changed	2009/06/08 20:53

_id	caadria2009_174
id	caadria2009_174
authors	Chen, Chiung-Hui
year	2009
title	A Prototype Using Multi-Agent Based Simulation in Spatial Analysis and Planning
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 513-521
doi	https://doi.org/10.52842/conf.caadria.2009.513
summary	Pedestrian’s movements and spatial cognition in urban environments are main issues for urban designers in urban spatial planning and analysis. This paper aims to study interactions between a behavioural model of pedestrians and urban spaces. The pedestrians can be represented by an agent program, and behavioural reactions of walking agents under different stimulus can be further simulated. Thus, this study suggests that, a correlation study on pedestrian behaviours and spatial environments become the criterion for urban designers in order to help them create better flows.
keywords	Spatial analysis, multi-agent, behaviour, simulation
series	CAADRIA
email
last changed	2022/06/07 07:55

_id	ecaade2009_195
id	ecaade2009_195
authors	Gürer, Ethem; Çagdas, Gülen
year	2009
title	An Emergent Form Generation Method for Supporting Conceptual Design
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. 167-172
doi	https://doi.org/10.52842/conf.ecaade.2009.167
wos	WOS:000334282200020
summary	Evolutionary design methodologies generally aim to present new form-finding processes, where nature-based approaches are used, such as self-organization, genetic algorithms etc. This paper aims to present a new architectural design approach that focuses on integrating these different evolutionary methods in an emergent process. The main goal is to achieve a high-level of integration where lacking qualities of each evolutionary method are completed by the other one in a synergic and especially emergent behavior. A multi-level design approach is described in this study. Points highlighted are concerned with the pre-design phases. Within a bottom-top simulation, an infinite high-level solution cluster is revealed from behavioral interactions and collectivity of the low-level entities: agents. Simulated design process is visualized by a determined project area in Istanbul: Kuruçe_me Island on the Bosphorus as an exhibition center. Programmed in 3dsMax, simulation phase supports the creative design process in early phases.
keywords	Evolutionary design, bottom-top approach, self-organization, agent, emergence
series	eCAADe
email
last changed	2022/06/07 07:49

_id	ecaade2009_101
id	ecaade2009_101
authors	Krijnen, Thomas; Beetz, Jakob; de Vries, Bauke
year	2009
title	Airport Schiphol: Behavioral Simulation of a Design Concept
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. 559-564
doi	https://doi.org/10.52842/conf.ecaade.2009.559
wos	WOS:000334282200067
summary	In this paper, we introduce an agent-based simulation of passengers in airport terminal buildings. A case study is described during which a prototype simulation tool is used to test the impact of a conceptual design change in an existing airport terminal building. We illustrate how this real-time, geometry-aware simulation can be generalized and integrated into the design process to support designers in configuring the spatial layout of public and functional buildings.
keywords	User behavior, agent-based simulation, airport terminal, design process, design evaluation
series	eCAADe
email
last changed	2022/06/07 07:51

_id	cf2009_861
id	cf2009_861
authors	Shih, Shen-Guan; Chen, Yen-Hung; Hu, Shan-Ching and Lin, Ching-Yuan
year	2009
title	On the simulation of pedestrian behavior: A stochastic model based on Markov chain and information space
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 861- 874
summary	Pedestrians move according to their internal states and the spatial information that they perceive at their locations. We use Markov chain to define the state transition of a pedestrian as a stochastic process, and the concept of cellular automata to simulate the way information disseminates in space. We have implemented an agent-based computer program to observe some emergent behaviors from the interactions between pedestrians and the information space they are surrounded. It is expected that the representational model can be used to assist designers in analyzing the relation between building plan and the circulation pattern.
keywords	Pedestrian behavior, simulation
series	CAAD Futures
email
last changed	2009/06/08 20:53

_id	sigradi2009_980
id	sigradi2009_980
authors	Romero R., William A.; Juan Camilo Ibarra; José Tiberio Hernández; Sergio Ordoñez
year	2009
title	Multi-modal simulation for urban mobility analysis: An approach based on a model of behaviour and infrastructure-related anomalies
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 presents a distributed simulation system for urban scenarios where infrastructure anomalies are common, such as those present in Latin-American cities. A microscopic-based model has been developed in order to represent the behavioural characteristics of the different mobility actors in a discrete lattice. The visualization component allows an interactive and immersive experience of the simulation results, providing a detailed point of view (focus) in the global environment (context). It is possible to empower the users’ interaction through devices for control and navigation of the data visualization.
keywords	Simulation Support Systems; Modelling and Simulation (M&S); Traffic Simulation; Immersive Visualization
series	SIGRADI
email
last changed	2016/03/10 09:59

_id	c25d
id	c25d
authors	Shady Attia, Liliana Beltrán, André De Herde and Jan Hensen
year	2009
title	Architect Friendly: A Comparison of Ten Different Building Performance Simulation Tools
source	IBPSA
summary	Performance Simulation tools BPS is available internationally. The users of those tools are mainly researchers, physicists and experts who value empirical validation, analytical verification and calibration of uncertainty as defined by e.g. BESTEST. However, literature and comparative surveys indicate that most architects who use BPS tools in design practice are much more concerned with the (1) Usability and Information Management (UIM) of interface and (2) the Integration of Intelligent design Knowledge-Base (IIKB). Those two issues are the main factors for identifying a building simulation program as “Architect Friendly”. Now, with the advancement of BPS tools and the recent announcements of direct links between BIM or non-BIM modeling tools and BPS tools it is important to compare the existing programs. Based on an online survey, this paper presents the results of comparing ten major BPS tools. The following programs are compared: ECOTECT, HEED, Energy 10, Design Builder, eQUEST, DOE-2, Green Building Studio, IES VE, Energy Plus and Energy Plus-SketchUp Plugin (OpenStudio). With 249 valid responses, the survey ranked the tools in three classes and revealed that architects seek the IIKB above the UIM of the interface. Finally, the paper summarizes the key findings and underlines the major requirements for future improvement and development of BPS tools, mainly from an architectural perspective.
series	other
type	normal paper
email
more	http://www.ibpsa.org/proceedings/BS2009/BS09_0204_211.pdf
last changed	2011/05/24 07:44

_id	cf2011_p018
id	cf2011_p018
authors	Sokmenoglu, Ahu; Cagdas Gulen, Sariyildiz Sevil
year	2011
title	A Multi-dimensional Exploration of Urban Attributes by Data Mining
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. 333-350.
summary	The paper which is proposed here will introduce an ongoing research project aiming to research data mining as a methodology of knowledge discovery in urban feature analysis. To address the increasing multi-dimensional and relational complexity of urban environments requires a multidisciplinary approach to urban analysis. This research is an attempt to establish a link between knowledge discovery methodologies and automated urban feature analysis. Therefore, in the scope of this research we apply data mining methodologies for urban analysis. Data mining is defined as to extract important patterns and trends from raw data (Witten and Frank, 2005). When applied to discover relationships between urban attributes, data mining can constitute a methodology for the analysis of multi-dimensional relational complexity of urban environments (Gil, Montenegro, Beirao and Duarte, 2009) The theoretical motivation of the research is derived by the lack of explanatory urban knowledge which is an issue since 1970‚Äôs in the area of urban research. This situation is mostly associated with deductive methods of analysis. The analysis of urban system from the perspective of few interrelated factors, without considering the multi-dimensionality of the system in a deductive fashion was not been explanatory enough. (Jacobs, 1961, Lefebvre, 1970 Harvey, 1973) To address the multi-dimensional and relational complexity of urban environments requires the consideration of diverse spatial, social, economic, cultural, morphological, environmental, political etc. features of urban entities. The main claim is that, in urban analysis, there is a need to advance from traditional one dimensional (Marshall, 2004) description and classification of urban forms (e.g. Land-use maps, Density maps) to the consideration of the simultaneous multi-dimensionality of urban systems. For this purpose, this research proposes a methodology consisting of the application of data mining as a knowledge discovery method into a GIS based conceptual urban database built out of official real data of Beyoglu. Generally, the proposed methodology is a framework for representing and analyzing urban entities represented as objects with properties (attributes). It concerns the formulation of an urban entity‚Äôs database based on both available and non-available (constructed from available data) data, and then data mining of spatial and non-spatial attributes of the urban entities. Location or position is the primary reference basis for the data that is describing urban entities. Urban entities are; building floors, buildings, building blocks, streets, geographically defined districts and neighborhoods etc. Urban attributes are district properties of locations (such as land-use, land value, slope, view and so forth) that change from one location to another. Every basic urban entity is unique in terms of its attributes. All the available qualitative and quantitative attributes that is relavant (in the mind of the analyst) and appropriate for encoding, can be coded inside the computer representation of the basic urban entity. Our methodology is applied by using the real and official, the most complex, complete and up-to-dataset of Beyoglu (a historical neighborhood of Istanbul) that is provided by the Istanbul Metropolitan Municipality (IBB). Basically, in our research, data mining in the context of urban data is introduced as a computer based, data-driven, context-specific approach for supporting analysis of urban systems without relying on any existing theories. Data mining in the context of urban data; ‚Ä¢ Can help in the design process by providing site-specific insight through deeper understanding of urban data. ‚Ä¢ Can produce results that can assist architects and urban planners at design, policy and strategy levels. ‚Ä¢ Can constitute a robust scientific base for rule definition in urban simulation applications such as urban growth prediction systems, land-use simulation models etc. In the paper, firstly we will present the framework of our research with an emphasis on its theoretical background. Afterwards we will introduce our methodology in detail and finally we will present some of important results of data mining analysis processed in Rapid Miner open-source software. Specifically, our research define a general framework for knowledge discovery in urban feature analysis and enable the usage of GIS and data mining as complementary applications in urban feature analysis. Acknowledgments I would like to thank to Nuffic, the Netherlands Organization for International Cooperation in Higher Education, for funding of this research. I would like to thank Ceyhun Burak Akgul for his support in Data Mining and to H. Serdar Kaya for his support in GIS.
keywords	urban feature analysis, data mining, urban database, urban complexity, GIS
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	caadria2009_033
id	caadria2009_033
authors	Hua, Hao; Biao Li, Yong Shan, Hong Zhang and Hong-mei Zhai
year	2009
title	Virtual Organism: Generative Tool Based on Multi-Agent System
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 625-634
doi	https://doi.org/10.52842/conf.caadria.2009.625
summary	A multi-agent system (MAS) is efficient as it can emulate a variety of organisms in natural science due to the interactions between agents, which make artificial systems responsive and adaptive. In “Bamboo Workshop” involved flexible structures, MAS was employed to create virtual organism in computational environment towards an innovative process in installation design. A generative tool with friendly user interface was developed for both observation and intervention besides debugging. At the same time investigations were carried on the complex behaviours of the system through graphic statistics. Integrated with the generative tool, a construction system made up of bamboo materials was set up to build a series of mobile and flexible installations. This experiment suggests that the virtual organism has the potential for being a part of the design intelligence, beyond a mere digital tool.
keywords	Virtual organism: multi-agent system; flexible structure; mobile installation
series	CAADRIA
email
last changed	2022/06/07 07:49

_id	cf2009_245
id	cf2009_245
authors	Ireland, Tim
year	2009
title	Emergent space diagrams: The application of swarm intelligence to the problem of automatic plan generation
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 245-258
summary	This work investigates how diagrams of architectural space might self-organize relative to specific associational parameters to generate diagrams of spatial organization. The premise is that buildings are systems of spatial relations defined by the dynamic interactions of various autonomous spatially discrete entities. Looking to swarm intelligence, the focus here is on the problem of circulation and explicit spatial arrangement. The paper reports an investigation of emergent route formation and spatial connectivity based on simple agent and pheromone interaction. An array of ant colonies defines the system. A colony’s nest represents a specific space. Space-agents transmit information throughout the space-colony population, defining an emergent communication network.
keywords	Agents, pheromones, ant colonies, spatial configuration, emergence
series	CAAD Futures
email
last changed	2009/06/08 20:53

_id	acadia10_183
id	acadia10_183
authors	Ireland, Tim
year	2010
title	Stigmergic Planning
source	ACADIA 10: LIFE in:formation, On Responsive Information and Variations in Architecture [Proceedings of the 30th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-4507-3471-4] New York 21-24 October, 2010), pp. 183-189
doi	https://doi.org/10.52842/conf.acadia.2010.183
summary	This paper presents an application of swarm intelligence towards the problem of spatial configuration. The methodology classifies activities as discrete entities, which self-organise topologically through associational parameters: an investigation of emergent route formation and spatial connectivity based on simple agent and pheromone interaction, coupled with the problem of ‘loose’ rectangular geometric assembly. A concept model sniffingSpace (Ireland, 2009) developed in Netlogo (Willensky, 1999), which established the self-organising topological capacity of the system, is extended in Processing (Fry & Rea, 2009) to incorporate rectangular geometry towards the problem of planning architectural space.
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:50

_id	cf2009_547
id	cf2009_547
authors	Kobayashi, Yoshihiro; Hawker, Ronald; Terzidis, Kostas; Narahara, Taro; Abdelhameed, Wael; Fukuda, Tomohiro; Labarca, Claudio; Calderon, Carlos and Jemtrud, Michael
year	2009
title	World8: International working group for new virtual reality applications in architecture
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 547- 556
summary	This paper introduces the activities of World8, an international working group on virtual reality, and demonstrates the group’s developed VR applications in architecture. Group members come from eight universities around the world, including the United States, the United Kingdom, Japan, Chile, Canada, Egypt, and the United Arab Emirates. The main objective is to develop a research framework for collaboration between architectural schools and a software developing company. Specifically, the group is looking to create new applications for VR visualizations of urban settings with dynamic agents such as human and vehicular traffic. Models developed by these members are explained, and the project is reviewed based on survey results.
keywords	Virtual reality, 3D city modeling, agent-based simulations, international project, education
series	CAAD Futures
type	normal paper
email
last changed	2010/04/04 16:41

_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

_id	621b
id	621b
authors	Peng, W and Gero, JS
year	2009
title	A Design Interaction Tool That Adapts
source	VDM Verlag
summary	Despite different computerised approaches have been hardwired to solve various complex practical problems; few are founded on an adaptive paradigm such that a computational model interacts with its environment, loosely wires itself and learns from experience like humans do. This book presents our attempt to craft a computational model that learns from interactions and adapts based on its experience. We draw ideas from cognitive psychology in relation to human experiential learning, particularly the notions of ?situatedness?, ?constructive memory? and ?concept formation?. When applied to design activities, which are intrinsically dynamic and interactive, this model constructs concepts from interactions between the agent, the design problem and the use of the design tool. Such a design interaction tool generates knowledge based on the agent?s grounded generalisation from contextual information in a situated manner. Adaptive behaviours emerge from coupled interactions of the system from a macroscopic and a microscopic level. This book is suitable for researchers and students interested in pursuing computerised approaches based on cognitive science and natural computing.
keywords	interaction, situated agents, adaptation
series	book
type	normal paper
email
more	http://www.amazon.com/Design-Interaction-Tool-That-Adapts/dp/363913589X/ref=sr_1_3?ie=UTF8&s=books&qid=1241365175&sr=1-3
last changed	2009/09/11 18:25

_id	ijac20097303
id	ijac20097303
authors	Taron, Joshua M.
year	2009
title	Interactive Hemostasis Modeling in Urban Network Design
source	International Journal of Architectural Computing vol. 7 - no. 3,375-387
summary	This paper describes a type of project that images a city as it might exist given the integration of hemostatic procedures within pedestrian networks during emergencies requiring full-scale egress from an urban core. It articulates the steps taken to integrate a pre-existing C++ hemostasis model (C. Jacob, 2008) into Maya software in order to describe how the project operates on a computational level. By projecting these agent-based logics directly into/onto each pedestrian in the city (the smallest unit of the system), egress-oriented infrastructure can shift from being extensively predetermined in form (concrete barriers, metal railing, police barricades, etc.), to something more intensively defined, real-time, and locally on-demand. These procedures are situated within a larger schema based on the structural principles of Norbert Wiener's cybernetic feedback loops, that acknowledge and allow for hybrid (top-down + bottom-up) awareness and control within systems. The project attempts to ally itself with emerging forms of network design with similar structural typologies supported through the use of personal mobile devices (PMDs) in urban environments.
series	journal
last changed	2009/10/20 08:02

_id	acadia18_216
id	acadia18_216
authors	Ahrens, Chandler; Chamberlain, Roger; Mitchell, Scott; Barnstorff, Adam
year	2018
title	Catoptric Surface
source	ACADIA // 2018: Recalibration. On imprecisionand infidelity. [Proceedings of the 38th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-17729-7] Mexico City, Mexico 18-20 October, 2018, pp. 216-225
doi	https://doi.org/10.52842/conf.acadia.2018.216
summary	The Catoptric Surface research project explores methods of reflecting daylight through a building envelope to form an image-based pattern of light on the interior environment. This research investigates the generation of atmospheric effects from daylighting projected onto architectural surfaces within a built environment in an attempt to amplify or reduce spatial perception. The mapping of variable organizations of light onto existing or new surfaces creates a condition where the perception of space does not rely on form alone. This condition creates a visual effect of a formless atmosphere and affects the way people use the space. Often the desired quantity and quality of daylight varies due to factors such as physiological differences due to age or the types of tasks people perform (Lechner 2009). Yet the dominant mode of thought toward the use of daylighting tends to promote a homogeneous environment, in that the resulting lighting level is the same throughout a space. This research project questions the desire for uniform lighting levels in favor of variegated and heterogeneous conditions. The main objective of this research is the production of a unique facade system that is capable of dynamically redirecting daylight to key locations deep within a building. Mirrors in a vertical array are individually adjusted via stepper motors in order to reflect more or less intense daylight into the interior space according to sun position and an image-based map. The image-based approach provides a way to specifically target lighting conditions, atmospheric effects, and the perception of space.
keywords	full paper, non-production robotics, representation + perception, performance + simulation, building technologies
series	ACADIA
type	paper
email
last changed	2022/06/07 07:54

_id	sigradi2009_854
id	sigradi2009_854
authors	Antoniazzi, Asdrubal; Airton Cattani; Jaqueline Viel Caberlon Pedoni
year	2009
title	Procedimentos metodológicos para simulação computacional de ambientes históricos [Methodological procedures for computer simulation of historical surroundings]
source	SIGraDi 2009 - Proceedings of the 13th Congress of the Iberoamerican Society of Digital Graphics, Sao Paulo, Brazil, November 16-18, 2009
summary	This study aims to present a classification of methodological procedures for using computer programmes to simulate architectural historical heritage. Produced for a Master’s Degree dissertation in Architecture, the methodology was developed based on several analyses of applications, possibilities and restrictions, with the assistance of photogrammetric reconstruction and several computer-graphics programmes. The files generated enable production of animations recording the changes experienced by buildings at various historical periods. These procedures were applied to the simulation of several buildings around the Praça Dante Alighieri in the centre of Caxias do Sul, Rio Grande do Sul, demonstrating their appropriateness and effectiveness and also showing the potential of computer-simulation resources for the historical environment, both educationally and in appreciation of architectural heritage.
keywords	Three-dimensional geometric modelling; Computer simulation; Digital reconstruction; Historical environment
series	SIGRADI
email
last changed	2016/03/10 09:47

_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	sigradi2009_964
id	sigradi2009_964
authors	Castriota, Leonardo Barci; Rezende
year	2009
title	Fotografia digital e imagens multi-perspectivas no estudo de sítios históricos [Digital photography and multi-perspective image in the study of historical sities]
source	SIGraDi 2009 - Proceedings of the 13th Congress of the Iberoamerican Society of Digital Graphics, Sao Paulo, Brazil, November 16-18, 2009
summary	The creation of panoramic images for depicting urban landscape is a technique that has its origins in Antiquity. These images, which are known to represent large urban areas from multiple views, can be considered true works of art. Recently there has been a growing interest by some researchers, especially in the area of computer graphics, in the production of multi-perspective images for representing historic sites. However, the focus of these studies has been especially the computational aspects of this process, and there are few studies that address the impact and possibilities of these methodologies in historic preservation and urban planning. Realizing this shortcoming and considering the demand for a perspective more connected to cultural heritage, our proposal is to associate the excellent visual results of the multi-perspective images to the rich possibilities of computer simulation that can provide digital photography. The fact is that in recent years we have experienced technological innovations in the field of computer simulation that far exceeded our expectations. While most surveys of buildings are still based on the use of tape measure, pencil, paper and camera, the computer has become increasingly the main interface between the user and the information and is now the preferred instrument for the production and viewing of images, including the creation of virtual environments. Thus, this work seeks to explore the great potential which seems to exist in the combination of digital photography and the technique of multi-perspective image representation, which may provide new approaches and perspectives for the field of historic preservation. For that, we present a rapid and low cost methodology, developed in recent years, which generates orthophotos and metric multi-perspective images, useful for the analysis of built heritage and historic sites. In addition to that, we will also discuss further possible byproducts of this methodology, among which we could highlight the creation of three-dimensional models, and the analysis of building pathologies in combination with thermal photography. As a case study, we will present a representation of the Rua dos Caetés, a listed historic district in Belo Horizonte (MG), Brazil.
keywords	Photogametry; Digital Photography; Heritage; Conservation
series	SIGRADI
email
last changed	2016/03/10 09:48

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