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	ga9815
id	ga9815
authors	Annunziato, M.
year	1998
title	The Nagual Experiment
source	International Conference on Generative Art
summary	This paper refers to an experiment about the use of artificial life structures in order to simulate/evocate natural or artificial patterns. These patterns are the effect of the self-organisation of a population of individuals during their process of development and growth. Although the local dynamics and interactions have a chaotic (partially random) behaviour, the global dynamics of the population produces interesting and well structured patterns. The graphic images generated with these procedures show a wide variety of structures in terms of life (growth) simulations and graphic geometries.
series	other
email
more	http://www.generativeart.com/
last changed	2003/08/07 17:25

_id	ddss9803
id	ddss9803
authors	Arentze, T., Borgers, A. and Timmermans, H.
year	1998
title	Extending spatial DSS with spatial choice models of multipurpose shopping trip behaviour
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	Spatial choice or interaction models have been widely used in spatial DSS or customised GIS for analysing the impacts of retail location plans. The models typically used, however, do not account for spatial agglomeration effects on spatial choice behaviour. This study develops a model system for analysing the impacts of retail plans based on a choice model of multipurpose behaviour developed in earlier work. The model system is implemented in the spatial DSS called Location Planner. An empirical study demonstrates the empirical estimation and use of the model for analysing the impacts of an expansion of floor space in the major shopping centre of a middle-sized city in The Netherlands. The results indicate that agglomeration effects as predicted by the model can have substantial impacts on the performance of retail systems. Therefore, it is argued that when incorporated in a spatial DSS, the more complex models have the potential to improve the use of these systems for impact analysis.
series	DDSS
last changed	2003/11/21 15:16

_id	4c8a
authors	Ball, L.J., Maskill, L. and Ormerod, T.C.
year	1998
title	Satisficing in engineering design: causes, consequences and implications for design support
source	Automation in Construction 7 (2-3) (1998) pp. 213-227
summary	We describe an approach to investigating design cognition which involved comparing prescriptive theories of good design practice with observations of actual design behaviour. The tenet of prescriptive theory which formed the focus of the research is the idea that designers should generate and evaluate multiple design alternatives in order to increase the chances of attaining better design solutions than might arise if they fixated upon an initial solution. Our study focused upon six professional electronic engineers attempting a novel integrated-circuit design problem. Verbal-protocol data revealed: (i) a failure to search for alternative solutions; (ii) a marked inclination to stick with early `satisficing' solution ideas even when these were showing deficiencies; and (iii) only superficial modelling and assessment of competing alternatives when such options were actually considered. We argue that while minimal solution search in design may sometimes be caused by motivational factors and working-memory limitations, its major determinant relates to inhibitory memory processes that arise subsequent to the recognition-based emergence of familiar design solutions. We conclude by exploring the implications of minimal solution search for design support, with particular reference to an agent-based indexing system which we are developing in order to facilitate the pursuit of design alternatives in engineering contexts.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	bb72
authors	Bourdot, P., Krus, M., Gherbi, R.
year	1998
title	Cooperation Between Reactive 3D Objects and a Multimodal X Window Kernel for CAD
source	Bunt, H., Beun, R.J., Borghuis, T. (Eds.). Multimodal Human-Computer Communication : Systems, Techniques, and Experiments. Berlin : Springer
summary	From the early steps of sketching to final engineering, a frequent and very important activity in designing objects is to perform graphical and spatial simulations to solve the constraints on the objects which are being designed. But when we analyse work situations involving the use of CAD systems, it is today an acknowledged fact that these tools are not helpful to perform these types of simulations. While knowledge modeling based on form feature concepts already offers some possibilities for attaching behaviour to objects, the simulation activity requires in addition a `real time' and `intelligent' management of the interactions between the 3D virtual objects and the CAD user. Our general purpose is to study how future CAD systems could be improved to achieve the simulation steps of object design. In this context we present some issues concerning the cooperation between a model of reactive 3D objects and a multimodal X Window kernel. We have developed a prototype of a system where objects with reactive behaviour can be built, and with which the user can interact with a combination of graphical actions and vocal commands. This prototype is used to evaluate the feasability and the usefulness of the integration of such techniques in futur applications that would be used by object designers in a real working context. We describe the current state of this system and the planned improvements.
series	other
last changed	2003/11/21 15:16

_id	e6ca
authors	Curry, Michael
year	1998
title	Digital Places: Living With Geographic Information Technologies
source	N.Y.: Routledge
summary	The last twenty-five years have seen major changes in the nature and scope of geographical information. This has happened in one way in society at large, where computers, satellites and global positioning systems have made geographical information more extensive, more detailed and more available. It has happened in another way within the university, where rapidly evolving geographic information systems have been touted as tools useful in a wide range of disciplines, tools that will resolve problems as different as the nature of global climate change and the routing of mail. In both settings the move from manual to computer-based systems is viewed as having a natural trajectory, from less powerful to more powerful technologies. These systems are held to be increasingly able to model and represent all that is important in geographical knowledge and behaviour. They are seen as fitting into and supporting traditional scientific and social practices and institutions. Digital Places: Living with Geographic Information Technologies shows that on each score the systems have been misunderstood and their impacts underestimated. By offering an understanding of Geographic Information Systems within the social, economic, legal, political and ethical contexts within which they exist, the author shows that there are substantial limits to their ability to represent the very objects and relationships, people and places, that many believe to be most important. Focusing on the ramifications of GIS usage, Digital Places shows that they are associated with far-reaching changes in the institutions in which they exist, and in the lives of those they touch. In the end they call for a complete rethinking of basic ideas, like privacy and intellectual property and the nature of scientific practice, that have underpinned public life for the last one hundred years.
series	other
last changed	2003/04/23 15:14

_id	ga0021
id	ga0021
authors	Eacott, John
year	2000
title	Generative music composition in practice - a critical evaluation
source	International Conference on Generative Art
summary	This critical evaluation will discuss 4 computer based musical works which, for reasons I shall explain, I describe as non-linear or generative. The works have been constructed by me and publicly performed or exhibited during a two year period from October 1998 to October 2000. ‘In the beginning…’ interactive music installation, strangeAttraction, Morley Gallery, London. July 1999 ‘jnrtv’ live generative dance music May 1999 to Dec 2000 ‘jazz’ interactive music installation, another strangeAttraction Morley Gallery, London. July 2000-09-26 ‘the street’ architectural interactive music installation, University of Westminster Oct 2000 Introduction I have always loved the practice of composing, particularly when it means scoring a work to be played by a live ensemble. There is something about taking a fresh sheet of manuscript , ruling the bar lines, adding clefs, key and time signatures and beginning the gradual process of adding notes, one at a time to the score until it is complete that is gratifying and compensates for the enormous effort involved. The process of scoring however is actually one distinct act within the more general task of creating music. Recently, the notion of ‘composing’ has met challenges through an increased interest in non-linear compositional methods. It is actually the presence of Chaotic or uncontrolable elements which add real beauty to music and many if not all of the things we value. If we think of a sunset, waves lapping on the shore, plants, trees a human face and the sound of the human voice, these things are not perfect and more importantly perhaps, they are transient, constantly changing and evolving. Last year and again this year, I have organised an exhibition of interactive , non-linear music installations called 'strangeAttraction'. The title refers to what Edward Lorenz called a ‘strange attractor’ the phenomenon that despite vast degrees of Chaos and uncertainty within a system, there is a degree of predictability, the tendency for chaotic behaviour to ‘attract’ towards a probable set of outcomes. Composition that deals with 'attractors' or probable outcomes rather than specific details which are set in stone is an increasingly intriguing notion.
series	other
more	http://www.generativeart.com/
last changed	2003/08/07 17:25

_id	aac0
authors	Garcia, Renato
year	1998
title	Structural Feel or Feelings for Structure? - Stirring Emotions through the Computer Interface in Behaviour Analysis of Building Structures
source	CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 163-171
doi	https://doi.org/10.52842/conf.caadria.1998.163
summary	The use of computers in the analysis of architectural structures has at present become indispensable and fairly routine. Researchers & professionals in architecture and engineering have taken advantage of current computer technology to develop richer and more comprehensive interactive interfaces in systems designed to analyse structural behaviour. This paper discusses a research project which attempts to further enrich such computer interfaces by embodying emotion or mood (affective) components into them and assessing the effects of incorporating these into multimodal learning modules for students of architecture at the University of Hong Kong. Computer structural analysis is most often used to determine the final state of a structure after full loading, but can also be used very ably to depict the time-history behaviour of a structure. The time-dependent nature of this process of behaviour provides an excellent opportunity to incorporate emotion cues for added emphasis and reinforcement. Studying time-history behaviour of structures is a vital part of classroom learning in structures and this why such emotion cues can have significant impact in such an environment. This is in contrast to the confines of professional engineering practices where these cues may not be as useful or desirable because oftentimes intermediate time history data is bypassed as a blackbox and focus is placed primarily on bottomline analysis results. The paper will discuss the fundamental basis for the establishment of emotional cues in this project as well as it's implementation-which consists mainly of two parts. The first involves 'personifying' the structure by putting in place a structure monitoring system analogous to human vital signs. The second involves setting up a 'ladder' of emotion states (which vary from feelings of serenity to those of extreme anxiety) mapped to the various states of a structures stability or condition. The paper will further elaborate on how this is achieved through the use of percussion, musical motifs, and chord progression in resonance with relevant graphical animations. Initially in this project, emotion cues were used to reinforce two structural behaviour tutoring systems developed by this author (3D Catenary Stuctures module & Plastic Behaviour of Semi-rigid Steel Frames module). These modules were ideal for implementing these cues because both depicted nonlinear structural behaviour in a mainly time-history oriented presentation. A brief demonstration of the actual learning modules used in the project study will also be presented together with a discussion of the assessment of it's effectiveness in actual classroom teaching.
keywords	Affective Interfaces, Human-Computer Interaction, Computer-Aided-Engineering
series	CAADRIA
email
more	http://www.caadria.org
last changed	2022/06/07 07:50

_id	b0d2
authors	Greenberg, S. and Roseman, M.
year	1998
title	Groupware Toolkits for Synchronous Work
source	Beaudouin-Lafon, M. (ed.) Computer - Supported Cooperative Work, Trends in Software Series, John Wiley
summary	Groupware toolkits let developers build applications for synchronous and distributed computer-based conferencing. This chapter describes four components that we believe toolkits must provide. A run-time architecture automatically manages the creation, interconnection, and communications of both centralized and distributed processes that comprise conference sessions. A set of groupware programming abstractions allows developers to control the behaviour of distributed processes, to take action on state changes, and to share relevant data. Groupware widgets let interface features of value to conference participants be added easily to groupware applications. Session managers let people create and manage their meetings and are built by developers to accommodate the group's working style. We illustrate the many ways these components can be designed by drawing on our own experiences with GroupKit, and by reviewing approaches taken by other toolkit developers.
series	other
last changed	2003/04/23 15:50

_id	6814
authors	Maver, T.W.
year	1998
title	From Virtual Reality to Real Virtuality
source	Design Computing Conference, Sydney
summary	The history of CAAD spans a short but eventful 30 years. This paper initially takes stock of the outcomes over this period by focusing sequentially on the modelling of the functional behaviour of building and on the modelling of the formal characteristics of building and cities. It conlcudes with a view of the way forward.
series	other
email
last changed	2003/04/16 12:28

_id	1
authors	Maver, Thomas W.
year	1998
title	Prospects for CAAD: An Optimistic Perspective
source	II Seminario Iberoamericano de Grafico Digital [SIGRADI Conference Proceedings / ISBN 978-97190-0-X] Mar del Plata (Argentina) 9-11 september 1998, pp. 6-13
summary	The history of CAAD spans a short but eventful 30 years. This paper initially takes stock of the outcomes over this period by focusing sequentially on the modelling of the functional behaviour of building and on the modelling of the formal characteristics of buildings and cities. It concludes with a view of the way forward.
series	SIGRADI
email
last changed	2016/03/10 09:55

_id	ddss9843
id	ddss9843
authors	Mitossi, Vicky and Koutamanis, Alexander
year	1998
title	Spatial representations as the basis of formal and functional analysis
source	Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary	The proliferation of the computer in the documentation of architectural designs generates a growing number of computerized architectural drawings. As a result, practice is showing an increasing interest in the utility of such drawings. This interest is linked to a fundamental promise of computerization in architecture, the analysis and evaluation of a building’s behaviour and performance during the design process. The main drawback of conventional computerized drawings is that they are restricted toplotting orthographic or, less frequently, perspective projections. This effectively reduces the computer to a mere electronic drafting table and computerized drawings to unstructured, haphazard collectionsof arbitrarily chosen graphic elements, normally of the lowest possible complexity. The lack of structure and in particular of meaningful, relevant primitives leads to inadequate support even for basic analyses and evaluations. We consider the structure of computerized design representations with respect to the choice of primitives that facilitate automation of analysis and support focused feedback. We argue that current drawing systems are capable of deriving the basic dual network of ‘solid’ building elements and ‘void’ spaces on the basis of user-input descriptions of familiar entities and that this network is sufficient for normative analyses.
series	DDSS
last changed	2003/08/07 16:36

_id	47e8
authors	Pikaar, R.N.
year	1998
title	Situation Analysis of Design Tasks for CAD Systems
source	Behaviour and Information Technology 1989 v.8 n.3 p.191-206
summary	There has been little empirical research on the human aspects of CAD systems. In this paper observations on the analyses of designer activities are presented, by using a systems design approach. The paper concentrates on situation analysis and subsequent allocation of system tasks. A situation analysis was carried out in two design departments. The analysis consisted of a formal system description and a reconstruction interview. During the interview the previous week's activities were reconstructed with the help of photographs of the drawing board and protocols completed by design draughtspersons. This procedure was used for six design projects. In this study the technique of the reconstruction interview proved to be very useful and informative, and enabled three general conclusions to be made. First, designers liked the initial design phase and their responsibility for the final result. Second, they disliked the activities associated with drawing as well as the project documentation phase. Third, they preferred to work with two or more drawings on the drawing board. A number of frequent tasks could be identified, for example, large scale manipulation within and between drawings. In the final section, an example of a global allocation of system tasks for the design of a CAD system is given.
series	other
last changed	2002/07/07 16:01

_id	451d
authors	Strong, James and Woodbury, Robert F.
year	1998
title	Psyberdesign: Designing the Cognitive Spaces of Virtual Environments
source	Digital Design Studios: Do Computers Make a Difference? [ACADIA Conference Proceedings / ISBN 1-880250-07-1] Québec City (Canada) October 22-25, 1998, pp. 276-288
doi	https://doi.org/10.52842/conf.acadia.1998.276
summary	Increasingly, we find ourselves spending more time on a daily basis engaged in a variety of virtual environments, ranging from those discovered when using the stand-alone computer, to more complex distributed networks such as the World Wide Web. Virtual environments are not restricted to the popular and hyped notion of immersive Virtual Reality systems, though, in immersion, such systems provide a dimension of experience sorely lacking in most human-computer interfaces. The design of a diverse range of virtual environments, from textual through to three dimensional, would seem to require insight from those who habitually create immersive experiences, whether real or virtual. The former include architects, the latter the authors of computer games. Virtual environments such as the Internet, and the World Wide Web in particular, are becoming increasingly confusing to navigate. Exploratory behaviour in these environments requires extensive cognitive effort, and often results in disorientation and a sense of anxiety. This paper attempts to address issues of cognitive mapping in virtual environment design, and the exciting role that architects should occupy in the creation of better virtual environments. A virtual environment tool, called WOMBAT, has been developed to discover more about the relationship between real environment and virtual environment navigation and cognitive mapping, and consequently the degree to which concepts and theories from real environment design and cognitive mapping research can be translated to the virtual environment domain. Both a natural environment and an information environment are being investigated using WOMBAT, with the primary interest being the cognitive mapping and wayfinding activities that are exhibited during exploration.
series	ACADIA
email
last changed	2022/06/07 07:56

_id	02ac
authors	Wang, Donggen
year	1998
title	Conjoint Approaches to Developing Activity-Based Models
source	Eindhoven University of Technology, Faculty of Architecture and Urban Planning, The Netherlands
summary	Since the late 1950s, transportation models have played an important role in forecasting travel demand and evaluating the impacts of plans and policies. Planners use transportation models to learn about the behavior of transport systems. Over the past decades, the development of particular modeling approaches has closely followed planning needs, which in turn are closely related to dominant policy issues. The first generation of transportation models was developed during the late 1950s and early 1960s. Their purpose was to facilitate the prediction of future travel demand, such that road capacity programs could be based on predicted demand. The first generation models are commonly referred to as four-step models. These models are typically formulated and calibrated at the level of the traffic zones. Individuals are aggregated by traffic zone. Traffic is considered to be the result of four sequential decisions: trip generation, trip distribution, modal split and traffic assignment. These decisions are modeled separately at successive stages. Although the four-step models have been widely used, even institutionalized in literally thousands of applications (Stopher, et al., 1996), the major shortcoming of these large-scale, aggregate and supply-oriented models is their lack of behavioral content.
keywords	Traffic Behaviour; Traffic and Transportation Research
series	thesis:PhD
last changed	2003/02/12 22:37

_id	ddss2004_d-1
id	ddss2004_d-1
authors	Cerovsek, T. and B. Martens
year	2004
title	On the Extended Use of Citations in CAAD
source	Van Leeuwen, J.P. and H.J.P. Timmermans (eds.) Developments in Design & Decision Support Systems in Architecture and Urban Planning, Eindhoven: Eindhoven University of Technology, ISBN 90-6814-155-4, p. 1-17
summary	This paper discusses the extended use of the Cumulative Index of CAAD (CUMINCAD) - a digital library set up in 1998 serving the CAAD-community as an important source of scientific information with over 6.000 recorded entries published on-line. The aim of this paper is to elaborate a related Citation Index to CUMINCAD - with over 20.000 references - and to provide information on entries with an exceptional high impact in the CUMINCAD database. The importance is determined through its use (citing) in the framework of afterwards published scientific materials. By utilizing graph theory methods extensive citation analyses will be presented illustrating the impact of particular contributions in different research topics.
keywords	Scientific Knowledge Management, Retrospective CAAD Research, Graph Theory, CAAD-Related Publications, Web-Based Bibliographic Database
series	DDSS
last changed	2004/07/03 22:13

_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	66c9
authors	Daru, Roel
year	1998
title	Architectural Bitmanship : Towards New Experiments in Architectural Education
source	Computerised Craftsmanship [eCAADe Conference Proceedings] Paris (France) 24-26 September 1998, pp. 44-60
doi	https://doi.org/10.52842/conf.ecaade.1998.044
summary	Crafts and craftmanship are about internalised skilled activities, practiced by individuals. According to the particular tools, materials and know-how used in history, it is possible to make distinctions and shows common roots between physical craftmanship, penmanship, draughtsmanship and (in our information age) digital craftsmanship. Every era develops its own crafts and demands its own system of education and pedagogical experiments to achieve the necessary skills. After retelling a very compressed history of all sorts of skills with their accompanying educational experiments in architecture, this paper suggest new experiments needed and required for the nascent era of digital craftsmanship
series	eCAADe
email
more	http://www.paris-valdemarne.archi.fr/archive/ecaade98/html/15daru/index.htm
last changed	2022/06/07 07:56

_id	2d33
authors	Gabryszewski, A.B.
year	1998
title	Conception of Computer-Aided Study of Determinants
source	Cyber-Real Design [Conference Proceedings / ISBN 83-905377-2-9] Bialystock (Poland), 23-25 April 1998, pp. 85-92
summary	Computer catalogues, files, digital maps and data bases are more and more widely used in planning studies not only in the world, but in Poland as well. They successfully replace manual and time- consuming elaboration of cartographic materials or uphill collecting of data, among others. The developing computerisation in architectural offices, physical planning or other area management centers will assure a studies results' transfer in the form of digital maps or computer data bases in the near future Computer technology forces changes of work technics and generates in the next step the demand for mathematical models used for examining of eco-social-economic systems functioning. The speed of data processing influences on the profitability of common usage of the source data available on magnetic recording media. Thus data processing and data aggregation according to the designers' needs are more simply and generating of new information essential for creating of updated constructive solutions is possible too. Sharply increasing information resources (like Internet) require the adoption of such techniques and models, which make easier to control still increasing number of over-complicated- structure data bases.
series	plCAD
last changed	1999/04/08 17:16

_id	07d8
authors	Garza, J.M. de la and Howitt, I.
year	1998
title	Wireless communication and computing at the construction jobsite
source	Automation in Construction 7 (4) (1998) pp. 327-347
summary	For many years, the walkie-talkie has been synonymous with the construction industry. During jobsite project execution, there are three variables which can either hinder or facilitate successful results, namely, quality, quantity, and timing of information. Wireless data communications technology is capable of delivering just-in-time information within the `last mile' between the trailer and a desired location on the jobsite. This paper reports on a study which surveyed information needs at the jobsite, emerging wireless data communications technology, and assessed the extent to which wireless data technology can fulfill the information needs of the jobsite [J.M. de la Garza, I. Howitt, Wireless communication and computing at the jobsite, Research Report 136-11, Construction Industry Institute, Austin, TX, 1997]. We have organized jobsite information needs into the following ten categories: (a) requests for information, (b) materials management, (c) equipment management, (d) cost management, (e) schedule and means and methods, (f) jobsite record keeping, (g) submittals, (h) safety, (i) QC/QA, and (k) future trends. Each category was analyzed in terms of its appropriateness to take advantage of wireless technology. The four formats considered to transmit information wirelessly were: (a) live voice, (b) live video, (c) batched data, and (d) live data. Current wireless communication technology has been classified into the following five classes: (a) circuit-switched wireless data systems, (b) packet-switched wireless data systems––this class was further subdivided into specialized mobile radio systems and cellular digital packet data systems, (c) wireless local area networks, (d) paging systems, and (e) satellite-based data communications. A primer for wireless communications covering both fundamental and advanced communications concepts has also been included to enable a better understanding of the issues involved in making trade-offs while configuring a wireless jobsite communication system. The example presented in this paper shows how a contractor can define a subset of information needs by choosing from those already articulated herein and determine if a given wireless technology should even be considered as a viable way of meeting the information needs that such company has.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	0b03
authors	Horváth, I., Vergeest, J.S.M., Broek, J.J., Rusák, Z. and De Smit, B.
year	1998
title	Tool profile and tool path calculation for free-form thick-layered fabrication
source	Computer-Aided Design, Vol. 30 (14) (1998) pp. 1097-1110
summary	In several application fields, large sized, free-form objects of various soft materials are widely used. Available layered prototyping technologies cannot be applied forfabrication of these kinds of objects due to size limitations. The authors have developed a novel approach of layered manufacturing that is the most appropriate forphysical concept modeling. This paper presents the algorithms for geometrically-based modeling of the profile curve of the flexible blade tool. It also describes thealgorithm for direct slicing of the CAD model. The second part of the paper deals with the algorithms for slicing, tool positioning and tool path calculation. On thefront surfaces of the layers G2, quasi G1 continuity can be implemented at the transition from one layer to another. In the circumferential direction G0 continuityexists.
keywords	Layered Manufacturing, Cutter Path Generation, Cutter Profiles, Hermite Interpolation
series	journal paper
last changed	2003/05/15 21:33

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