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	728a
authors	Mantere, Markku
year	2001
title	Visualization of Flow Data in Photo-realistic Virtual Environment
source	Helsinki University of Technology, Espoo, Finland
summary	Virtual reality technology has been adopted in many different fields and new application areas are searched continuously. At the moment virtual reality has been applied separately for instance to scientific visualization and illustration of architectural spaces. In this work, a photo-realistic room model and a visualization of an air flow inside the room has been combined. The integrated illustrative three-dimensional model is presented within an immersive virtual environment. The first part of the work covers scientific visualization and virtual reality implementation techniques. The visualization review begins with a discussion about human percepion of visual information and proceeds with an introduction to three-dimensional visualization. The focus is on illustration of a flow data produced as a result of a computational simulation. The flow visualization techniques utilizing all three dimensions are discussed and many examples of different graphical elements are presented. Virtual reality is examined from technical solutions point of view. The features having effect on the quality of a virtual experience are discussed and three different commonly used display techniques are introduced. The hardware of Experimental Virtual Environment -facility at Helsinki University of Technology is given as a detailed example. The implementation of a visualization software is described in the applied part of this thesis. Discussion covers the evaluation of different software tools, the tool selection process, and a detailed description of the design principles and implementation of the software. The different visualization solutions are also justified in this part. In the implementation, the real-time system requirements and utilization of all three dimensions have been taken into account. Finally, the results and their meaning are discussed and the performance of the implementation is evaluated. The applied part successfully integrated the room model and the flow visualization in an interactive virtual environment.
keywords	Virtual Environments, Virtual Reality, Flow Visualization, CFD, 3D, Computer Graphics
series	thesis:MSc
last changed	2003/02/12 22:37

_id	avocaad_2001_07
id	avocaad_2001_07
authors	Stefan Wrona, Adam Gorczyca
year	2001
title	Complexity in Architecture - How CAAD can be involved to Deal with it. - "Duality"
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	“Complexity “ is for us a very ambigous notion. It may be understood in two contexts.1.Thorough solution of a problem.Complexity means full recognition of design area, followed by appropriate work. That work must be thorough and interdisciplinary – if necessary, separated to different co-operatives. These trade designers reqiure a branch coordination and – the most important- all of them must have a „common denominator”. Such as a proper CAAD platform and office standards. That will reduce costs of changes, improve an interplay between designers and somtimes enable to face up a new challenge.Nowadays architects are no longer “solitary” individualists working alone – they must concern a team – they become a member, a part of a huge design machine. “Import/export”, compatibility, interplay – these words must appear and we have to put a stress on them. How to organize work for different trade-designers? How to join in common database architectural design ,engineering design, HVAC design, electricity design, technology design, computer network design and all other trades ?...A key to solve this range of problems is in good work organization. Universal prescription does not exist, but some evergreen rules can be observed. We are going to present a scheme of work in CAAD application ALLPLAN FT v.16 with a Group manager , which starts to conquest polish market and is widely spread in Germany. “Golden rules” of ALLPLAN FT There is one database – it is placed on server. It includes all projects. There is a well-developed office standard. It must be created at the beginning of collaboration, although it is possible to improve it later. It consist of hatches, fonts, symbols, macros, materials, pen-widths, and – the most important –layers . A layer set – predefined structure divided into functional groups – e.g. drafting, text, dimensioning, architecture, HVAC, engineering, urban design, etc.That stucture is a part of an office standard – all workers use a relevant part of it. No name duplicates, no misunderstandings... If however design extends, and a new group of layers is required, it can be easily added, e.g. computer networks, fireguard systems. Administrator of ALLPLAN network defines different users and gives them different permitions of access. For example – an electrician will be able to draft on layer “electricity”, but he won’t modify anything at layer “architecture – walls”, and he won’t even see a layer “engineering- slabs”, because he doesn’t need it..At the same time our electrician will be able to see , how architect moves some walls and how HVAC moved and started to cross with his wires. Every user is able to see relevant changes, after they are saved by author. Two different users can not access at the same time the same file. That excludes inconsistent or overlapping changes . All users operate on a 3D model. While putting some data into a model, they must remember about a “Z” coordinate at work-storey. But at the same time all create a fully-integrated, synchronous database, which can be used later for bills of quantities, specifications, and – of course – for visuaisation. That method can be described as “model-centric”. To simplify complex structure of architectural object -ALLPLAN offers files. Usually one file means one storey, but at special designs it might become a functional part of a storey, or whatever you wish. Files connected with layers easy enable to separate certain structural elements, e.g. if we want to glance only at concrete slabs and columns in the building – we will turn on all files with “layer filter” – “slabs” and “columns”. ALLPLAN is of course one of possible solutions. We described it , because we use it in our workshop. It seems to be stretchy enough to face up every demand and ever-increasing complexity of current projects. The essence of the matter, however, is not a name or version of application – it is a set of features, we mentioned above, which allows to deal with EVERY project. The number of solutions is infinite.2. Increasing difficulties during design process. It may be associated with more and more installations inside of new buildings, especially some “high-tech” examples. The number of these installations increases as well as their complexity. Now buildings are full of sensors, video-screens, computer networks, safety-guard systems... Difficulties are connected with some trends in contemporary architecture, for example an organic architecture, which conceives “morphed” shapes, “moving” surfaces, “soft” solids. This direction is specially supported by modelling or CAD applications. Sometimes it is good – they allow to realize all imaginations, but often they lead to produce “unbuildable” forms, which can exist only in virtual world.Obstacles appear, when we design huge cubatures with “dense” functional scheme. Multi-purposed objects, exhibition halls, olimpic stadium at Sydney – all of them have to be stretchy, even if it requires sliding thousands pound concrete blocks! Requirements were never so high.The last reason, why designs become so complex is obvious - intensifying changes due to specific requirements of clients/developers.We could say “ signum tempori” – everything gets more and more complicated , people have to become specialists, to face up new technology. But how CAAD can help us with it? How?! We have already answered that question. Sometimes CAAD is the only way to imagine and sketch something, to visualize something, to compute a construction , to prepare a simulation... So that human must “only” interprete ready solutions. Sometimes CAAD help us to notify a problem. It works exactly in the same way, as spy-glasses does. For example – without a real-time visualization we we would have never realised (until finished!) some strange interference of solids, which have occured in the upper roof part of our new appartment-house.ConclusionsTemporary CAAD is an integral part of design process – not only as a tool, but sometimes as an inspiration. It helps to organize our work, to define problems, to filter relevant elements and to render our visions. It becomes an integral part of our senses – and that will be a real complexity in architecture...
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	a4a1
authors	Bukowski, Richard W.
year	2001
title	Interactive Walkthrough Environments for Simulation
source	University of California at Berkeley
summary	This thesis describes a second-generation walkthrough framework that provides extensive facilities for integrating many types of third-party simulation codes into a large-scale virtual environment model, and puts it in perspective with first-generation systems built during the last two decades. The framework provides an advanced model database that supports multiple simultaneous users with full consistency semantics, system independent storage and retrieval, and efficient prefetching and object reconstruction techniques to support second and third-generation walkthrough systems. Furthermore, our framework integrates support for scalable, distributed, interactive models with plug-in physical simulation to provide a large and rich environment suitable for architectural evaluation and training applications. A number of third-party simulations have been integrated into the framework, including dynamic physical interactions, fire simulation, multiple distributed users, radiosity, and online tapestry generation. All of these simulators interact with each other and with the user via a data distribution network that provides efficient, optimized use of bandwidth to transport simulation results to clients as they need them for visualization. These diverse simulators provide proof of concept for the generality of the framework, and show how quickly third-party simulations can be integrated into our system. The result is a highly interactive distributed architectural model with applications in research, training, and real-time data visualization. Finally, an outlook is given to a possible third generation of virtual environment architectures that are capable of integrating different heterogeneous walkthrough models.
series	thesis:PhD
email
more	http://www.cs.berkeley.edu/~bukowski/resume.html
last changed	2003/02/12 22:37

_id	e6c5
authors	Heintz, John L.
year	2001
title	Coordinating virtual building design teams
source	Stellingwerff, Martijn and Verbeke, Johan (Eds.), ACCOLADE - Architecture, Collaboration, Design. Delft University Press (DUP Science) / ISBN 90-407-2216-1 / The Netherlands, pp. 65-76 [Book ordering info: m.c.stellingwerff@bk.tudelft.nl]
summary	Most research in design project management support systems treats the subject as an isolated objective problem. The goals to be met are defined in terms of a supposed universal view of the project, and now outside concerns are taken into account. While such approaches, including project simulation, may yield excellent results, they ignore what, for many projects, are the real difficulties. Design projects are not isolated. All participants have other obligations that compete with the given project for attention and resources. The various participants in the design process have different goals. For these reasons it is proposed that design project management can be best facilitated by tools which assist the participating actors to share suitable management information in order to make better co-ordination possible, while allowing the resource balancing between projects to occur in private. Such a tool represents the design project management task as a negotiation task that spans both projects and firms; the management of one project is the management of all. The model of design collaboration upon which the Design Coordination System (DeCo) is built was developed from 1) a heuristic case study used to gain insight into the ways in which designers co-ordinate their efforts, and 2) the application of the theory of the social contract as developed by John Rawls to the problem of design project management. The key innovation in the DeCo system is the shaping of the project management system around existing practices of collaborative project design management and planning. DeCo takes advantage of how designers already co-ordinate their work with each other and resolve disputes over deadlines and time lines. The advantage of DeCo is that it formalises these existing practices in order to accommodate both the increasing co-ordination burden and the difficulties brought about by the internationalisation of design practice. DeCo, the design project management system proposed here, provides a representation, a communications protocol, and a game theoretical decision structure. The combination of these three units provides users with the ability to exchange structured pictures of the project as seen from the points of view of individual actors. Further, it suggests a mechanism based on a specific principle of fairness for arriving at mutually acceptable project plans. The DeCo system permits the users freedom to manage their design processes as they will, while providing a basic compatibility between practices of design team members which supports their collaborative efforts to co-ordinate their design work.
series	other
last changed	2001/09/14 21:30

_id	2dba
id	2dba
authors	Tasli, S
year	2001
title	WHAT DOES COMPUTER AIDED DESIGN OFFER FOR PRODUCING LIVABLE BUILDINGS IN THE 21ST CENTURY?
source	Proceedings of the Livable Environments and Architecture International Congress (LIVENARCH 2001). July 4-7, 2001, Trabzon, Turkey, pp. 278-282.
summary	Designing livable buildings has always been a major concern for architects but they are often criticized on account of failing in this aim. However, this is not only due to the ignorance of the designers, but also of the complexity of the factors that are essential to design but difficult to incorporate the design process. Buildings are shaped and occupied under several dynamically changing conditions and paper-based media and conventional Computer Aided Design (CAD) tools are inefficient in representing them. This paper aims to discuss the changing role of digital media for architectural design in response to the increasing complexity of design processes. Some proposals, supported by recent technological innovations, are suggested for the future and they are compared with the conventional uses of CAD. It is claimed that in the 21st century, the main advantage of using computers will be to dynamically simulate buildings in time in highly visualized virtual environments to evaluate the future performance of proposed designs. The design model will not only look as if it were real, but it will also “behave” as if it were real so as to provide dynamic and intelligent response. The two key technologies for the development of such modeling, virtual reality and object-oriented programming are addressed and four promising application areas for near future (evaluation of user-building interaction, visualization of environmental factors, construction scheduling, and combined CAD-GIS) are discussed. Some important considerations for the development of dynamically simulated virtual models are analyzed and suggestions are made for further research.
keywords	Architectural Design, Dynamic Simulation, and Virtual Environments
series	other
type	normal paper
email
last changed	2005/12/01 16:02

_id	9a04
authors	Bouza Rodríguez, J.B., Valcarce, J.D., Baltar, X.L. and Vázquez, M.P.
year	2001
title	SISTEMA WEB INTERACTIVO CON CATÁLOGO PSEUDO-TRIDIMENSIONAL DE RODUCTOS Y VÍDEO EN TIEMPO REAL (Interactive Web System with Pseudo-Three-Dimensional Catalogue of Places and Video in Real Time)
source	SIGraDi biobio2001 - [Proceedings of the 5th Iberoamerican Congress of Digital Graphics / ISBN 956-7813-12-4] Concepcion (Chile) 21-23 november 2001, pp. 104-106
summary	It has been designed and developed a system Web that has video in real time and an interactive product catalogue based on pseudo-three-dimensional models, that is to say, models that they pretend to be three-dimensional, but that in fact do not have geometry 3D properly in the memory, but of an appropriate composition according to the case of geometry 2D (image or any graph), that allows to see the model from several points of view and to consult additional information (weight, material, dimensions, etc.). They have been analyzed and proven the different formats from transmission of video and audio by Internet, studying all its parameters, until finding the optimal ones for this server. In comparison with the use of format VRML (Virtual Reality Modeling Language) used commonly to put models 3D in the Web, this system that we have devised presents like advantages the low time of load, the high precision of the views of the object and the low cost of maintenance of the Web. On the other hand, one does not have the infinity of views and facility of manipulation of the VRML.
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	a808
authors	Cheng, M.-Y. Liang, Y., Wey, C,-M. and Chen, J.-C.
year	2001
title	Technological enhancement and creation of a computer-aided construction system for the shotcreting robot
source	Automation in Construction 10 (4) (2001) pp. 517-526
summary	This paper addresses the technological enhancement of the shotcreting robot. The shotcreting robot has an arm with six degrees of freedoms, which is remotely controlled by an operator. Due to current utilization drawbacks, an improvement plan has been developed in two stages. First, the control system of the semi-automated robot was improved by reducing the number of joysticks from six to two, incorporating a real-time computer simulation model enhanced to identify model feasibility. Second, the robot was enhanced from semi-automated to fully automated. Thus, an automated profile measuring instrument is used to measure the excavated surface and a simulation model calculates the nozzle path for shotcreting. The automated shotcreting robot was completed by integrated the graphical model with the robot control system.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	avocaad_2001_02
id	avocaad_2001_02
authors	Cheng-Yuan Lin, Yu-Tung Liu
year	2001
title	A digital Procedure of Building Construction: A practical project
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	In earlier times in which computers have not yet been developed well, there has been some researches regarding representation using conventional media (Gombrich, 1960; Arnheim, 1970). For ancient architects, the design process was described abstractly by text (Hewitt, 1985; Cable, 1983); the process evolved from unselfconscious to conscious ways (Alexander, 1964). Till the appearance of 2D drawings, these drawings could only express abstract visual thinking and visually conceptualized vocabulary (Goldschmidt, 1999). Then with the massive use of physical models in the Renaissance, the form and space of architecture was given better precision (Millon, 1994). Researches continued their attempts to identify the nature of different design tools (Eastman and Fereshe, 1994). Simon (1981) figured out that human increasingly relies on other specialists, computational agents, and materials referred to augment their cognitive abilities. This discourse was verified by recent research on conception of design and the expression using digital technologies (McCullough, 1996; Perez-Gomez and Pelletier, 1997). While other design tools did not change as much as representation (Panofsky, 1991; Koch, 1997), the involvement of computers in conventional architecture design arouses a new design thinking of digital architecture (Liu, 1996; Krawczyk, 1997; Murray, 1997; Wertheim, 1999). The notion of the link between ideas and media is emphasized throughout various fields, such as architectural education (Radford, 2000), Internet, and restoration of historical architecture (Potier et al., 2000). Information technology is also an important tool for civil engineering projects (Choi and Ibbs, 1989). Compared with conventional design media, computers avoid some errors in the process (Zaera, 1997). However, most of the application of computers to construction is restricted to simulations in building process (Halpin, 1990). It is worth studying how to employ computer technology meaningfully to bring significant changes to concept stage during the process of building construction (Madazo, 2000; Dave, 2000) and communication (Haymaker, 2000).In architectural design, concept design was achieved through drawings and models (Mitchell, 1997), while the working drawings and even shop drawings were brewed and communicated through drawings only. However, the most effective method of shaping building elements is to build models by computer (Madrazo, 1999). With the trend of 3D visualization (Johnson and Clayton, 1998) and the difference of designing between the physical environment and virtual environment (Maher et al. 2000), we intend to study the possibilities of using digital models, in addition to drawings, as a critical media in the conceptual stage of building construction process in the near future (just as the critical role that physical models played in early design process in the Renaissance). This research is combined with two practical building projects, following the progress of construction by using digital models and animations to simulate the structural layouts of the projects. We also tried to solve the complicated and even conflicting problems in the detail and piping design process through an easily accessible and precise interface. An attempt was made to delineate the hierarchy of the elements in a single structural and constructional system, and the corresponding relations among the systems. Since building construction is often complicated and even conflicting, precision needed to complete the projects can not be based merely on 2D drawings with some imagination. The purpose of this paper is to describe all the related elements according to precision and correctness, to discuss every possibility of different thinking in design of electric-mechanical engineering, to receive feedback from the construction projects in the real world, and to compare the digital models with conventional drawings.Through the application of this research, the subtle relations between the conventional drawings and digital models can be used in the area of building construction. Moreover, a theoretical model and standard process is proposed by using conventional drawings, digital models and physical buildings. By introducing the intervention of digital media in design process of working drawings and shop drawings, there is an opportune chance to use the digital media as a prominent design tool. This study extends the use of digital model and animation from design process to construction process. However, the entire construction process involves various details and exceptions, which are not discussed in this paper. These limitations should be explored in future studies.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_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	cf2009_585
id	cf2009_585
authors	E. Swarts, Matthew; A. Sheward, Hugo
year	2009
title	Using multi-level virtual environments as a medium for conducting design review through a shared IFC dataset
source	T. Tidafi and T. Dorta (eds) Joining Languages, Cultures and Visions: CAADFutures 2009, PUM, 2009, pp. 585- 597
summary	For a long time the Architecture-Engineering-Construction (AEC) community has had difficulty in communicating the content of their work, not only the various specialties involved, but also to their clients. Studies (Doorst and Cross 2001; Bakhtin 1994) suggest the importance of multi-role collaborative environments in supporting design processes. We are developing a Multi Level Design Review Tool for the AEC industry which allows multiple actors to congregate and interact as agents around a central Building Model. It merges real-time virtual 3D visualization technologies with Industry Foundation Classes (IFC) to support both high levels of semantic content and seamless interoperability.
keywords	Design review, virtual environment, interoperability
series	CAAD Futures
email
last changed	2009/06/08 20:53

_id	afe6
authors	Funkhouser, Thomas
year	2001
title	Modeling acoustics in virtual environments using the uniform theory of diffraction
source	Siggraph 2001
summary	Realistic modeling of reverberant sound in 3D virtual worlds provides users with important cues for localizing sound sources and understanding spatial properties of the environment. Unfortunately, current geometric acoustic modeling systems do not accurately simulate reverberant sound. Instead, they model only direct transmission and specular reflection, while diffraction is either ignored or modeled through statistical approximation. However, diffraction is important for correct interpretation of acoustic environments, especially when the direct path between sound source and receiver is occluded. The Uniform Theory of Diffraction (UTD) extends geometrical acoustics with diffraction phenomena: illuminated edges become secondary sources of diffracted rays that in turn may propagate through the environment. In this paper, we propose an efficient way for computing the acoustical effect of diffraction paths using the UTD for deriving secondary diffracted rays and associated diffraction coefficients. Our main contributions are: 1) a beam tracing method for enumerating sequences of diffracting edges efficiently and without aliasing in densely occluded polyhedral environments; 2) a practical approximation to the simulated sound field in which diffraction is considered only in shadow regions; and 3) a real-time auralization system demonstrating that diffraction dramatically improves the quality of spatialized sound in virtual environments.
series	other
last changed	2003/04/23 15:50

_id	avocaad_2001_19
id	avocaad_2001_19
authors	Shen-Kai Tang, Yu-Tung Liu, Yu-Sheng Chung, Chi-Seng Chung
year	2001
title	The visual harmony between new and old materials in the restoration of historical architecture: A study of computer simulation
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	In the research of historical architecture restoration, scholars respectively focus on the field of architectural context and architectural archeology (Shi, 1988, 1990, 1991, 1992, 1995; Fu, 1995, 1997; Chiu, 2000) or on architecture construction and the procedure of restoration (Shi, 1988, 1989; Chiu, 1990). How to choose materials and cope with their durability becomes an important issue in the restoration of historical architecture (Dasser, 1990; Wang, 1998).In the related research of the usage and durability of materials, some scholars deem that, instead of continuing the traditional ways that last for hundreds of years (that is to replace new materials with old ones), it might be better to keep the original materials (Dasser, 1990). However, unavoidably, some of the originals are much worn. Thus we have to first establish the standard of eliminating components, and secondly to replace identical or similar materials with the old components (Lee, 1990). After accomplishing the restoration, we often unexpectedly find out that the renewed historical building is too new that the sense of history is eliminated (Dasser, 1990; Fu, 1997). Actually this is the important factor that determines the accomplishment of restoration. In the past, some scholars find out that the contrast and conflict between new and old materials are contributed to the different time of manufacture and different coating, such as antiseptic, pattern, etc., which result in the discrepancy of the sense of visual perception (Lee, 1990; Fu, 1997; Dasser, 1990).In recent years, a number of researches and practice of computer technology have been done in the field of architectural design. We are able to proceed design communication more exactly by the application of some systematic softwares, such as image processing, computer graphic, computer modeling/rendering, animation, multimedia, virtual reality and so on (Lawson, 1995; Liu, 1996). The application of computer technology to the research of the preservation of historical architecture is comparatively late. Continually some researchers explore the procedure of restoration by computer simulation technology (Potier, 2000), or establish digital database of the investigation of historical architecture (Sasada, 2000; Wang, 1998). How to choose materials by the technology of computer simulation influences the sense of visual perception. Liu (2000) has a more complete result on visual impact analysis and assessment (VIAA) about the research of urban design projection. The main subjects of this research paper focuses on whether the technology of computer simulation can extenuate the conflict between new and old materials that imposed on visual perception.The objective of this paper is to propose a standard method of visual harmony effects for materials in historical architecture (taking the Gigi Train Station destroyed by the earthquake in last September as the operating example).There are five steps in this research: 1.Categorize the materials of historical architecture and establish the information in digital database. 2.Get new materials of historical architecture and establish the information in digital database. 3.According to the mixing amount of new and old materials, determinate their proportion of the building; mixing new and old materials in a certain way. 4.Assign the mixed materials to the computer model and proceed the simulation of lighting. 5.Make experts and the citizens to evaluate the accomplished computer model in order to propose the expected standard method.According to the experiment mentioned above, we first address a procedure of material simulation of the historical architecture restoration and then offer some suggestions of how to mix new and old materials.By this procedure of simulation, we offer a better view to control the restoration of historical architecture. And, the discrepancy and discordance by new and old materials can be released. Moreover, we thus avoid to reconstructing ¡§too new¡¨ historical architecture.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	cc97
authors	Zhou, Q., Krawczyk, R.J. and Schipporeit, G.
year	2002
title	From CAD to iAD - A Web-based Steel Consulting of Steel Construction in Architecture
doi	https://doi.org/10.52842/conf.ecaade.2002.346
source	Connecting the Real and the Virtual - design e-ducation [20th eCAADe Conference Proceedings / ISBN 0-9541183-0-8] Warsaw (Poland) 18-20 September 2002, pp. 346-349
summary	Information technology has become so powerful that what is conventionally called CAD might evolve to iAD (Internet Aided Design) (Zhou 2000). For Internet applications in the AEC industry, most of the efforts and success have been concentrated on project management and collaboration, while in the design and engineering consulting area, limited progress has been made. At the same time, contemporary development has not changed the nature of the fragmentation of the AEC industry. Based on previous research of surveys of development of Internet applications in the AEC industry (Zhou 2001), and the proposal of conceptual model of Internet-based engineering consulting in architecture (Zhou2002), we try to apply these theories and concepts into a specified area, steel construction consulting for architects. In previous research, first of all, we defined the contents and scope of steel construction consulting and their potential application. Second, we proposed a solid working model covering structure organization, audience, services provided and technology. In this research, a web-based application will be out by prototyped by conducting a conceptual design consulting in steel structure in order to show the whole process of how this Internet-based consulting model works.
series	eCAADe
email
last changed	2022/06/07 07:57

_id	bb5f
authors	Ahmad Rafi, M.E. and Mohd Fazidin, J.
year	2001
title	Creating a City Administration System (CAS) using Virtual Reality in an Immersive Collaborative Environment (ICE)
doi	https://doi.org/10.52842/conf.ecaade.2001.449
source	Architectural Information Management [19th eCAADe Conference Proceedings / ISBN 0-9523687-8-1] Helsinki (Finland) 29-31 August 2001, pp. 449-453
summary	Current problems in administration of a city are found to be decentralized and noninteractive for an effective city management. This usually will result in inconsistencies of decision-making, inefficient services and slow response to a particular action. City administration often spends more money, time and human resource because of these problems. This research demonstrates our research and development of creating a City Administration System (CAS) to solve the problems stated above. The task of the system is to use information, multimedia and graphical technologies to form a database in which the city administrators can monitor, understand and manage an entire city from a central location. The key technology behind the success of the overall system uses virtual reality and immersive collaborative environment (ICE). This system employs emerging computer based real-time interactive technologies that are expected to ensure effective decisionmaking process, improved communication, and collaboration, error reduction, (Rafi and Karboulonis, 2000) between multi disciplinary users and approaches. This multi perspective approach allows planners, engineers, urban designers, architects, local authorities, environmentalists and general public to search, understand, process and anticipate the impact of a particular situation in the new city. It is hoped that the CAS will benefit city administrators to give them a tool that gives them the ability to understand, plan, and manage the business of running the city.
keywords	City Administration System (CAS), Virtual Reality, Immersive Collaborative Environment (ICE), Database
series	eCAADe
email
last changed	2022/06/07 07:54

_id	ga0118
id	ga0118
authors	Annunziato, Mauro and Pierucci, Piero
year	2001
title	Learning and Contamination in Virtual Worlds
source	International Conference on Generative Art
summary	The most recent advances of artificial life scientific research are opening up a new frontier: the creation of simulated life environments populated by autonomous agents. In these environments artificial beings can interact, reproduce and evolve [4, 6, 15], and can be seen as laboratories whereto explore the emergence of social behaviors like competition, cooperation, relationships and communication [5, 7] . It is still not possible to approach a reasonable simulation of the incredible complexity of human or animal societies, but these environments can be used as a scientific orartistic tool to explore some basic aspects of the evolution [1, 2, 3, 9, 10, 11, 12, 13, 14]. The combination of these concepts with robotics technology or with immersive-interactive 3D environments (virtual reality) are changing quickly well known paradigms like digital life, manmachineinterface, virtual world. The virtual world metaphor becomes interesting when the artificial beings can develop some form of learning, increasing their performances, adaptation, and developing the ability to exchange information with human visitors. In this sense the evolution enhances the creative power and meaningful of these environments, and human visitors experience an emotion of a shift from a simplified simulation of the reality to a real immersion into an imaginary life. We may think that these realization are the first sparks of a new form of life: simulated for the soft-alife thinkers, real for the hard-alife thinkers, or a simple imaginary vision for the artists.
series	other
email
more	http://www.generativeart.com/
last changed	2003/11/21 15:15

_id	100d
authors	Hadikusumo, B.H.W. and Rowlinson, S.
year	2001
title	Development of a virtually real construction site - design for safety
source	CIDAC, Volume 3 Issue 2 May 2001
summary	Interpreting two-dimensional drawings presents problems for builders since they are required to transfer these into three-dimensional mental images. Virtual Reality (VR) technology has several advantages. One is that it can be used to solve the problem of image transfer since VR supports a What-You-See-Is-What-You-Get object together with a binocular effect, improving users' visual sense. Another advantage of VR is the capability to present a real time dynamic simulation, which can be used to represent construction processes. By representing virtually real construction components and processes, users can walk through the virtual project. Using his/her safety knowledge, he/she can identify safety hazards inherent within the virtually real construction components and processes and determine the appropriate safety precautions to employ to make the virtual construction site safe. This hazard identification process can be better achieved if a guideline is provided. Therefore, a Design-For-Safety-Process (DFSP) guideline is developed to assist users to identify safety hazards as well as to recommend remedial safety measures. This paper discusses how virtual reality benefits the construction industry in terms of a design representation. In addition, important issues in developing virtually real construction components and processes as well as functions of virtual reality which are needed to support the DFSP are discussed.
series	journal paper
last changed	2003/05/15 20:36

_id	avocaad_2001_13
id	avocaad_2001_13
authors	Alexander Koutamanis
year	2001
title	Modeling irregular and complex forms
source	AVOCAAD - ADDED VALUE OF COMPUTER AIDED ARCHITECTURAL DESIGN, Nys Koenraad, Provoost Tom, Verbeke Johan, Verleye Johan (Eds.), (2001) Hogeschool voor Wetenschap en Kunst - Departement Architectuur Sint-Lucas, Campus Brussel, ISBN 80-76101-05-1
summary	Computational technologies provide arguably the first real opportunity architectural design has had for a comprehensive description of built form. With the advent of affordable computer-aided design systems (including drafting, modeling, visualization and simulation tools), architects believe they can be in full control of geometric aspects and, through these, of a wide spectrum of other aspects that are implicit or explicit in the geometric representation. This belief is based primarily on the efficiency and effectiveness of computer systems, ranging from the richness and adaptability of geometric primitives to the utility of geometric representations in simulations of climatic aspects. Such capabilities support attempts to design and construct more irregular or otherwise complex forms. These fall under two main categories: (1) parsing of irregularity into elementary components, and (2) correlation of the form of a building with complex geometric structures.The first category takes advantage of the compactness and flexibility of computational representations in order to analyse the form of a design into basic elements, usually elementary geometric primitives. These are either arranged into simple, unconstrained configurations or related to each other by relationships that define e.g. parametric relative positioning or Boolean combinations. In both cases the result is a reduction of local complexity and an increase of implicit or explicit relationships, including the possibility of hierarchical structures.The second category attempts to correlate built form with constraints that derive usually from construction but can also be morphological. The correlation determines the applicability of complex geometric structures (minimally ruled surfaces) to the description of a design. The product of this application is generally variable in quality, depending upon the designer's grounding in geometry and his ability to integrate constraints from different aspects in the definition of the design's geometry.Both categories represent a potential leap forward but are also equally hampered by the rigidity of the implementation mechanisms upon which they rely heavily. The paper proposes an approach to making these mechanisms subordinate to the cognitive and technical aspects of architectural thinking through fuzzy modeling. This way of modeling involves a combination of (a) canonical forms, (b) tolerances around canonical forms and positions, (c) minimal and maximal values, (d) fuzzy boundaries, and (e) plastic interaction between elements based on the dual principles of local intelligence and autonomy. Fuzzy models come therefore closer to the intuitive manners of sketching, while facilitating transition to precise and complex forms. The paper presents two applications of fuzzy modeling. The first concerns the generation of schematic building layouts, including adaptive control of programmatic requirements. The second is a system for designing stairs that can adapt themselves to changes in their immediate environment through a fuzzy definition of geometric and topological parametrization.
series	AVOCAAD
email
last changed	2005/09/09 10:48

_id	d146
authors	He, Jie
year	2001
title	CAD Study in Visual Analysis of the Visual Sustainability for China Urban Natural Landscape Planning
source	Chinese University of Hong Kong
summary	In this thesis a GIS-based CAD system prototype of evaluating visual quality of urban natural landscape environment is presented. This prototype is an indispensable component of the integrative Visual Sustainability research, and offers a calculable and visualizable technique to urban visual natural landscape assessment. This scientific method provides precise data to estimate the visibility of natural landscape in urban construction actuality. Furthermore, it can also work out supporting information for maintaining and protecting valuable visual landscape resources in further planning. Introduction of this methodology intends to improve the natural landscape cooperation in China urban planning through visual protection. Combining with popular CAD software such as AutoCAD and Microstation, the research team uses ArcView GIS software and its 3D Analyst extension to accomplish a set of research procedure, which includes data modification, model making, viewshed and view sensibility analysis. In addition, this system can create simultaneous 3D scenes or hire other information media as reference tools for professional analysis, design consultation and intercommunication. The core technologies of this proposed system are viewshed calculation and overlay analysis. In viewshed analysis, human visual characteristics are simulated by a series of ergonomics parameters of viewpoints. Viewshed of each viewpoint can be calculated into vector data and mapped by polygons identifying which region is visible and which is not. Overlay function of the proposed system is used in visual sensibility analysis to achieve the division of higher visual sensible area which indicates the common visible area from different viewpoints. Additionally, viewshed maps and visual sensibility results can add more information to mark out the areas that can satisfy certain visual parameters such as appropriate visual angle or visual distance. These overlaying results can visualized the visible areas into hierarchical visual perception quality categories in order to define the visual landscape significance of particular planning regions. A case study was operated to evaluate this system. The case is in Zhongshan city, Guangdong Province of China. Jinzishan hill region is the study site that picked by collaborating discussion of research team and the local government. It is located on the edge of urban built-up area. Jinzishan massif is the prominent landscape element of the surrounding environment. There are three topics in Jinzishan visual perception in this paper. The first topic is the visual quality evaluation of the intersections of its surrounding road system. The second is the integrated visual perception of two main roads called Qiwandao and Bo‚Äôailu. Finally is the analysis of the hill skyline visual quality in surrounding area. The analysis results in GIS vector data can be converted into popular data format and combined with other spatial information for practical application. And comments for future urban planning are collected and analyzed by professional responses to the computer-generated information investigation.
keywords	Natural Landscaping; Computer-Aided Design; Landscape Architecture; City Planning; Geographic Information Systems
series	thesis:MSc
email
last changed	2003/02/12 22:37

_id	e693
authors	Caneparo, Luca
year	2001
title	Shared virtual reality for design and management: the Porta Susa project
source	Automation in Construction 10 (2) (2001) pp. 217-228
summary	The paper presents the implementation of a system of Shared Virtual Reality (SVR) in Internet applied to a large-scale project. The applications of SVR to architectural and urban design are presented in the context of a real project, the new railway junction of Porta Susa and the surrounding urban area in the city centre of Turin, Italy. SVR differs from Virtual Reality (VR) in that the experience of virtual spaces is no longer individual, but rather shared across the Internet with other users simultaneously connected. SVR offers an effective approach to Construction Data Model and Computer Supported Collaborative Work, because it integrates both the communicative tools to improve collaboration and the distributed environment to process information across the networks.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	2178
authors	Chevrier, C. and Perrin, J.P.
year	2001
title	Interactive 3D reconstruction for urban areas. An image based tool
source	Proceedings of the Ninth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-7023-6] Eindhoven, 8-11 July 2001, pp. 753-765
summary	Urban applications (for example arrangement, new buildings, virtual sightseeing and walkthrough) require a three dimensional (3D) geometrical model of town areas. However, most of them do not need an accurate model of reality. Such model would occupy a considerable memory space and would be too slow to handle. Architects, urban designers and civil engineers can find in our tool a medium to conceive their projects. Some types of software exist but they do not correspond exactly to our needs. Consequently we have conceived and developed an interactive tool for virtual 3D rough reconstruction of buildings. The software development has been performed in the Maya environment (ALIAS Wavefront) with C++ language and MEL (Maya Embedded Language). A constraint we set for ourselves was the use of only light devices (for easy transportation) at low price (everybody can buy such devices). The principle is to overlay on the scanned photograph of the area we want to deal with, the two dimensional (2D) cadastral plan displayed from the same viewpoint as the picture. Then each building body can be extruded from its ground polygon and the roof can be created from what the user sees on the picture. A constraint is the flatness of the polygonal surfaces. Our application context was the town of Nancy in France for which some areas have been reconstructed. Some pictures have been used as textures for polygonal surfaces, giving more reality effect to the simulation.
keywords	Geometrical Modelling, Architecture, Urban Area, Virtual Visit
series	CAAD Futures
email
last changed	2006/11/07 07:22

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