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 df4b
authors Angulo Mendivil, Antonieta Humbelina
year 1995
title On the Conceptual Feasibility of a CAAD-CAAI Integrated Decision Support System: A Computer Aided Environment for Technical Decision Making in Architecture
source Delft University of Technology
summary This document addresses two questions: What are the ultimate means of design support we can offer to the architect, and how can we devise them? We are not the first ones to address these questions, neither the first ones to point our finger in the direction of Decision Support Systems for such purposes. Nevertheless, we may be among those scholars that understanding 'Decision Support" in terms of "Learning Support", are willing to explore the implications that such an understanding assumes for the concept of Decision Support Systems. Our exploration in such regards has shown us that knowledge application and knowledge acquisition cycles describe a continuum, and that such cycles, encapsulated in our "Practice Based Learning" and "Continuing Professional Development" dynamics are present in both our instructional and professional environments. From such a perspective, our scope regarding feasible Decision Support Systems is not restricted to the use of CAAD instrumental resources, but expanded into a context of CAAD-CAAI integration. Throughout this document we conceive a system that blends CAAD and CAAI resources looking forward to the creation of a Support Environment that seeks to motivate a reflective attitude during design, in such a way, upgrade our capability for acquiring as well as applying knowledge in design. In instrumental terms, this document explains how mainstream CAAD developments in the field of "Intelligent Front End Technology" and CAAI developments in the field of "Knowledge-based Curricular Networks" can complement each other in the establishment of a Decision Support System of trans-environmental relevancy. As an application framework for the concept and instrumental base described above, this document presents an image of the kind of decision-making model that it will intend to support, the kind of task support model it will look forward to implement, and the kind of general instrumental layout it will require. On the basis of such an instrumental layout, the system that is hereby outlined can be regarded as a "CAAD-CAAI Integrated", "Intelligent", and "User-Oriented" Interface System.
series thesis:PhD
last changed 2003/02/12 21:37

_id 8593
authors Braid, I.C.
year 1980
title Superficial Blends in Geometric Modelling
source 12 p. : ill. February, 1980. Document No. 105. includes bibliography
summary In engineering practice, many blended surfaces are both indicated and manufactured by rounding off a sharp edge. The authors term them `superficial' blends in contrast to `designed' blends for which existing surface techniques are appropriate. The provision of superficial blends in a geometric modeling system is explained, and a method is given for drawing objects containing blended edges
keywords geometric modeling, CAD, representation, solids
series CADline
last changed 2003/06/02 11:58

_id 62ad
authors Kuan, L.P. and Hinds, John K.
year 1975
title A New Breed of Geometry for Numerical Control-Surfaces Through General Curves
source pp. 133- 169 : ill. (pp.144-169)
summary Recent geometric developments in the CAM-I Sculptured Surface project show promising applications to the perplexing problems of describing blends and fillets for conventional geometric parts, as well as providing greatly increased capability in the expression of pure sculptured shapes. The new geometry -- named 'Surfaces Through General Curves' -- is integrated into both the APT processor and the CASPA preprocessor. The CASPA (acronym for Computer-Aided Sculptures Pre-APT) processor is discussed briefly. All graphics material for this presentation was prepared through the use of this preprocessor. The original purpose of this talk was to discuss a preprocessor to the APT system. This preprocessor -- CASPA -- was first released in July of 1975 and contains the majority of sculptured geometry combined with a graphics processor. The preprocessor has been a great success as a development tool and has also been used by a number of sponsors in design and manufacturing applications. The system has been so successful that the main theme of this talk had to be changed to cover the new geometric developments in Sculptured Surfaces which were made possible by having a development tool such as CASPA. So the first part of this talk will sketch an outline of CASPA and the second part will describe the concepts and applications for some of these new geometric developments. Briefly, the CASPA system was developed in response to a single critical requirement: the need to have a system, simpler and more flexible then the full APT system, for implementing and testing new developments in Sculptured Geometry. The CASPA system today contains all of the Sculptured Geometric capability together with an integrated and extensive 3-dimensional graphics capability. It is a single-pass processor with a very simple, fixed-format input and interfaces with APT by punching APT- readable canonical forms. it is also capable of generating APT readable 'GOTO' cards to accomplish numerical control pattern machining of geometric models
keywords curves, curved surfaces, representation, computational geometry, CAM, mechanical engineering
series CADline
last changed 2003/06/02 11:58

_id 53c6
authors Mardaljevic, John
year 2000
title Daylight Simulation: Validation, Sky Models and Daylight Coefficients
source De Montfort University, Leicester, UK
summary The application of lighting simulation techniques for daylight illuminance modelling in architectural spaces is described in this thesis. The prediction tool used for all the work described here is the Radiance lighting simulation system. An overview of the features and capabilities of the Radiance system is presented. Daylight simulation using the Radiance system is described in some detail. The relation between physical quantities and the lighting simulation parameters is made clear in a series of progressively more complex examples. Effective use of the inter-reflection calculation is described. The illuminance calculation is validated under real sky conditions for a full-size office space. The simulation model used sky luminance patterns that were based directly on measurements. Internal illuminance predictions are compared with measurements for 754 skies that cover a wide range of naturally occurring conditions. The processing of the sky luminance measurements for the lighting simulation is described. The accuracy of the illuminance predictions is shown to be, in the main, comparable with the accuracy of the model input data. There were a number of predictions with low accuracy. Evidence is presented to show that these result from imprecision in the model specification - such as, uncertainty of the circumsolar luminance - rather than the prediction algorithms themselves. Procedures to visualise and reduce illuminance and lighting-related data are presented. The ability of sky models to reproduce measured sky luminance patterns for the purpose of predicting internal illuminance is investigated. Four sky models and two sky models blends are assessed. Predictions of internal illuminance using sky models/blends are compared against those using measured sky luminance patterns. The sky model blends and the Perez All-weather model are shown to perform comparably well. Illuminance predictions using measured skies however were invariably better than those using sky models/blends. Several formulations of the daylight coefficient approach for predicting time varying illuminances are presented. Radiance is used to predict the daylight coefficients from which internal illuminances are derived. The form and magnitude of the daylight coefficients are related to the scene geometry and the discretisation scheme. Internal illuminances are derived for four daylight coefficient formulations based on the measured luminance patterns for the 754 skies. For the best of the formulations, the accuracy of the daylight coefficient derived illuminances is shown to be comparable to that using the standard Radiance calculation method. The use of the daylight coefficient approach to both accurately and efficiently predict hourly internal daylight illuminance levels for an entire year is described. Daylight coefficients are invariant to building orientation for a fixed building configuration. This property of daylight coefficients is exploited to yield hourly internal illuminances for a full year as a function of building orientation. Visual data analysis techniques are used to display and process the massive number of derived illuminances.
series thesis:PhD
last changed 2003/02/12 21:37

_id sigradi2005_773
id sigradi2005_773
authors Tramontano, Marcelo; Edson Salerno Junior
year 2005
title Beyond HCI: Colaboratives graphic interfaces.
source SIGraDi 2005 - [Proceedings of the 9th Iberoamerican Congress of Digital Graphics] Lima - Peru 21-24 november 2005, vol. 2, pp. 773-777
summary This article intends to present a research work in process which targets the production of design principles for multi-users graphic interfaces, allowing the creation of dialog spaces for a communitarian purpose, using the knowledge from system-user and user-interface interaction and from semiotic and cognitive psychology. It blends studies in both technological and perceptive fields, focusing on interfaces production with a non-linear structure, with an associative navigability, mostly commanded by signs and graphic elements of easy comprehension. The research goal is to understand how to allow users to build an individualized portion of cyberspace, where dialogs can be established with other community members. This work is part of Nomads.usp, Center for Habitation and Ways of Living Studies - University of São Paulo, that studies and produces criteria to rethink nowadays spaces design, considering its recent history, the transformations occurred in families groups, and its behavior tendencies. [Full paper in Portuguese]
series SIGRADI
last changed 2016/03/10 09:01

_id 72a1
authors Ward, G.
year 1994
title The RADIANCE Lighting Simulation and Rendering System
source Computer Graphics Proceedings, Annual Conference Series, 1994, pp. 459-472
summary This paper describes a physically-based rendering system tailored to the demands of lighting design and architecture. The simulation uses a light-backwards ray-tracing method with extensions to efficiently solve the rendering equation under most conditions. This includes specular, diffuse and directional-diffuse reflection and transmission in any combination to any level in any environment, including complicated, curved geometries. The simulation blends deterministic and stochastic raytracing techniques to achieve the best balance between speed and accuracy in its local and global illumination methods. Some of the more interesting techniques are outlined, with references to more detailed descriptions elsewhere. Finally, examples are given of successful applications of this free software by others.
series journal paper
last changed 2003/04/23 13:50

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