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	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
doi	https://doi.org/10.52842/conf.caadria.1998.163
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
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	ad62
authors	Klaus, R. and Urbaniak, A.
year	1998
title	Safety algorithms for excavator engine control
source	Automation in Construction 7 (5) (1998) pp. 391-400
summary	The diesel engine without load and speed controller is a nonlinear astatic object. The torque and moment of internal friction (the diesel engine without load and governor) cross in the field of the engine's destruction (the speed limit was exceeded). Hence, the diesel engine is equipped with a speed governor. The main task of the governor is to counteract exceeding of the speed limit. We did a research on the engine with an injection pump wherein the conventional centrifugal governor was replaced by the microprocessor controller. This is because using a large number of electronic elements microcontroller has smaller reliability in comparison with mechanical governors. In order to protect the engine from the results of the controller's defect, we invented a safety system. The system guarantees the controlled stoppage of the engine's work in dangerous states. Information in this article are presented concerning protection and self-diagnostics of SW 400 engine control system that makes use of DP535 controller with Siemens 80C535 microcontroller. The presented control system is successfully tested in an excavator.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	6b50
authors	Ueng,W.-D., Lai, J.-Y. and Doong, J.L.
year	1998
title	Sweep-surface reconstruction from three-dimensional measured data
source	Computer-Aided Design, Vol. 30 (10) (1998) pp. 791-805
summary	The purpose of this work was to present a surface fitting algorithm for sweep surface reconstruction from three-dimensional measured data. The sweeping ruleconsidered in this work was essentially translational sweeping in which the generators traverse about the directors to form the desired sweep surface. Thesweep-surface fitting was formulated as a nonlinear least-squares minimization problem for which an error expression was minimized which yields the optimizedgenerators, the directors and the parameter values corresponding to each measured data. An algorithm was presented also to convert the sweep surface model into acomposite spline surface which could be imported into most CAD/CAM systems. Effective experimental results were provided to illustrate the feasibility of theproposed strategy.
keywords	Reverse Engineering, Sweep-Surface Fitting, Least-Squares Method
series	journal paper
last changed	2003/05/15 21:33

_id	c86a
authors	Dudek, D., Dudek, K. and Przystupa, F.W.
year	1998
title	Reduction of noise in neighborhood of lignite strip mine
source	Automation in Construction 7 (5) (1998) pp. 413-426
summary	Methods of identifying, assessing, reducing the number of causes of noise, and counteracting noise (potential vibrational acoustic signal sources, the identification and location of the sources, noise propagation over terrain, working conditions) in the neighborhood of a lignite strip mine are presented. On the basis of noise measurements and an assessment of the propagation conditions, the obtained results are analyzed against a background of environmental noise arduousness standards. Conclusions and guidelines relating to further material-design optimization efforts are given.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

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

_id	0aa0
authors	P_onecki, L., Trampczynski, W. and Cendrowicz, J.
year	1998
title	A concept of digital control system to assist the operator of hydraulic excavators
source	Automation in Construction 7 (5) (1998) pp. 401-411
summary	A concept of digital control system to assist the operators of hydraulic excavators is presented and discussed. Then, control system based on described ideas was mounted on a special numerically controlled stand, equipped with D/A and A/D converters, where small hydraulic backhoe excavator K-111 fixtures were used. Experimental results shows that it fulfils all described requirements and can be used as the machine operator assist. It enables for precision tool guidance, automatic repetition of realized movements, realization of specific tool trajectories (including energetically optimal paths) and automatic improvement or optimization of realized paths. Tool trajectories can also be prescribed using the setting model, making excavator the machine of teleoperator class. Presented system can be used as a basis for real machine control system.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:23

_id	acadia08_278
id	acadia08_278
authors	Paz Gutierrez, Maria
year	2008
title	Material Bio-Intelligibility
doi	https://doi.org/10.52842/conf.acadia.2008.278
source	Silicon + Skin: Biological Processes and Computation, [Proceedings of the 28th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) / ISBN 978-0-9789463-4-0] Minneapolis 16-19 October 2008, 278-285
summary	Through the formation of bio-chemical information networks natural materials possess efficient processes of self-organization, adaptability, regeneration and decomposition. This performative excellence has lead science to draw behavioral models from nature implementing biomimmicry (Benyus 1998) in the pursuit of material systems optimization. Design disciplines influenced by this course are integrating living organisms as models of efficiency through bionic systems ever more into their discourse. Architecture, influenced by this tendency, is becoming progressively more aware of the vast benefits that biomimetics can yield particularly in the development of ecologically sensitive systems. Yet, the emerging incorporation of bionics into architecture is differing largely to that within the sciences by centering almost exclusively in form (geometrical pattern) generation. This paper analyzes a rising material design research methodology implementing biomimetics: matter-form parametrics based on bio-physical properties’ data. Specific study of the incorporation of broad-scalar scientific imaging into the formulation of explorative parametric grammar for the development of material systems is analyzed through a bio-synthetic polymer based wall system (SugarWall, Gensler+Gutierrez 2006b). The incorporation of broad scalar imaging and material interdependencies is propelling the emergence of new programming tactics that will affect bio-material systems architectural research.
keywords	Behavior; Biomimetics; Material; System; Visualization
series	ACADIA
last changed	2022/06/07 07:59

_id	ceca
authors	Schmidt, L.C. and Cagan, Jonathan
year	1998
title	Optimal Configuration Design: an Integrated Approach Using Grammars
source	Journal of Mechanical Design 120, no. 1: 2-9
summary	A computational approach to design that integrates conceptual design, configuration design, and component selection tasks overcomes some of the barriers to successful design automation. FFREADA is an implementation of a general design generation and optimization algorithm featuring hierarchical ordering of grammar based-design generation processes at different levels of abstraction. FFREADA is used to generate near-optimal hand-held power drill trains in a space which exceeding 200 million designs that are not limited to any particular functional architecture or component configuration. Drill power train designs within 1 percent of the optimal solution are found in minutes by sampling 302,000 design states on average. Optimal configurations are found for drills with three different torque requirements.
series	journal paper
last changed	2003/04/23 15:50

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