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	54cc
authors	Kalawsky, R.
year	1993
title	The Science of Virtual Reality and Virtual Environments
source	Addison-Wesley, Cambridge, UK
summary	This book goals hits basic idea: giving a review on Virtual Reality and on the theory at its basis. Starting from history, going trought science as medicine, arriving at technical stuff this is in syntesis this book. For everyone interested in "How it work?". Only one problem : sometimes is too difficoult to understand at no graduate persons dues to hi level techincal explanations in particoular in display chapter
series	other
last changed	2003/04/23 15:14

_id	ecaade2024_333
id	ecaade2024_333
authors	Favero Marchi, Carlos E.; Hirschberg, Urs L.
year	2024
title	Synergizing BIM Processes in Architectural Education: Computing design-environment resonances via parametric modelling, dataflow scripting and performance simulation integration: a pedagogic demonstration
source	Kontovourkis, O, Phocas, MC and Wurzer, G (eds.), Data-Driven Intelligence - Proceedings of the 42nd Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2024), Nicosia, 11-13 September 2024, Volume 2, pp. 17–26
doi	https://doi.org/10.52842/conf.ecaade.2024.2.017
summary	This paper addresses challenges in harnessing the full potential of Building Information Modelling (BIM) as an architectural design instrument, from a pedagogical perspective. It introduces a plural and flexible BIM framework that integrates parametric modelling, data-flow scripting and design performance simulation techniques creatively in the design process. The framework is demonstrated through an academic endeavour, where students explored the articulation of distinct workflows, departing from the yet-fresh Rhino.Inside.Revit technology to evaluate ecological implications of architectural design. This involved computing potential resonances existing between building form (material and geometric configurations) and environmental conditions (such as solar exposure, energy performance and embodied carbon dynamics) over two proposed application scenarios: Stage 1 and Stage 2. Additionally, the paper presents an inventive teaching methodology that revolves around adopting masterpieces as Architectonic Models of complex systems, while designing from the perspective of a third—an embodied avatar.
keywords	Architecture Education, Digital Design Pedagogy, Parametric Design, Building Information Modelling, Dataflow Scripting, Design Performance Simulation
series	eCAADe
email
last changed	2024/11/17 22:05

_id	4248
authors	Kalay, Y.E. and Skibniewski, M.J.
year	1995
title	Automation in Construction: Fulfilling the promise
source	Automation in Construction 4 (1) (1995) pp. 1-3
summary	Three years ago, Elsevier Science B.V. has embarked on one of the most important endeavors for the A/E/C community, worldwide. With the help of three dedicated individuals, it has inaugurated a new refereed journal devoted to discussing, critically examining and disseminating the latest developments affecting the processes that lead to the design, construction and use of buildings and other facilities. Unlike other jour-nals in this field, Automation in Construction has been dedicated to exploring the processes and tools used by the A/E/C community, rather than its products. It has been dedicated to issues concerning the A/ E / C community specifically, and to methods, practices and tools that make use of computers in particular, thereby filling a void which existed, until its inauguration, within the A/E/C community's publications.
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/06/02 09:30

_id	cb47
authors	Kalay, Yehuda E.
year	1991
title	Computational Modalities of Evaluation and Prediction in Design
source	Computer Aided Architectural Design Futures: Education, Research, Applications [CAAD Futures ‘91 Conference Proceedings / ISBN 3-528-08821-4] Zürich (Switzerland), July 1991, pp. 271-284
summary	Evaluation can be defined as measuring the fit between achieved (or expected) performances and stated criteria. It is complicated by the multi-criteria and multi-level modalities of design, where an overall balance of performances is preferred to maximizing the performance of a few characteristics, and where evaluation must be performed at different design phases, each characterized by a different informational profile. Each design modality requires a different approach to evaluation: the Multi-Criteria modality requires evaluation of a proposed solution at a particular design phase from multiple points of view, while the Multi-Level modality requires the evaluation of a particular performance characteristic at several different design phases. This paper discusses the multi-modal nature of evaluation and prediction in design, exemplified by some of the approaches that have been proposed to support them computationally. It then argues for the need to develop an integrated, multi-modal design evaluation paradigm.
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	4b8e
authors	Kalay, Yehuda E. and Eastman, Charles M.
year	1983
title	Shape Operation : An Algorithm For Binary Combining Boundary Model Solids
source	November, 1983. 30 p. : ill. includes bibliography
summary	The attractiveness of shape operators to end-users of geometric modeling systems stems from their intuitive clarity. Their implementation, however, is one of the most difficult algorithms in computational geometry. This complexity is further increased by the special properties of surfaces, such as orientation, that places the algorithm in the domain of manifold theory more than of set theory. A theoretical base for applying the set-theoretic operators of union, intersection and difference to spatial domains is presented, along with an algorithm that is successful in negotiating these complexities and all their special cases (in particular the presence of coincidental surfaces). The general principles of representing solids through their bounding surfaces and topics in manifold theory and boolean algebra relevant to understanding the algorithm are also discussed. The algorithm has been successfully implemented in three different geometric modeling systems over a period of four years. Some example of its application are included
keywords	algorithms, boolean operations, solid modeling, B-rep, geometric modeling, topology
series	CADline
email
last changed	2003/05/17 10:18

_id	6259
authors	Kalay, Yehuda E. and Majkowski, Bruce R.
year	1990
title	CAD Technology Transfer: A Case Study
source	From Research to Practice [ACADIA Conference Proceedings] Big Sky (Montana - USA) 4-6 October 1990, pp. 133-143
doi	https://doi.org/10.52842/conf.acadia.1990.133
summary	Transferring innovative university-based research results to the industry or practice that will ultimately use them is an arduous, time-consuming effort. One way to effect this technology transfer is to develop a demonstrable prototype product and then find or form a corporation that can expand the prototype into a full product and market it to the profession. Another way, which can shorten the transfer process, is to "sell" the idea, rather than the product, to a corporation that has the vision, the resources and the technical competency to support its development, with the intent to eventually market it. In this paper, we describe a case study of this latter approach, based on our seven year experience of researching, developing and transferring innovative architectural CAD technology. We describe the birth, growth, and maturity of Worldview, a computer-aided design and modeling system for use by architects. The project was initiated in 1983, and went through five software versions, numerous grants and grant extensions, two granting corporations, and extensive field testing. The software has developed into a mature system, with sufficient functionality appropriate for commercial distribution. The paper describes not only the factual chronology of the project, but also highlights the advantages and drawbacks of market-oriented university research. We conclude with suggestions as to how the process may be improved, and how problems and obstacles can be minimized.
series	ACADIA
email
last changed	2022/06/07 07:52

_id	4bd7
authors	Kalay, Yehuda E.
year	1981
title	Recursive Subdivision of Rectangular Bicubic Bezier Patches Using Patch Re-Parametrization
source	October, 1981. 7 p. : ill. includes bibliography
summary	This paper presents an analytical approach for the subdivision of curved surfaces made of rectangular patches, exploiting the properties of the Bernstein-Bezier surface representation. It is presented and demonstrated for the recursive subdivision of a patch into 4 sub-patches. It utilizes the linear dependency between the parametric vectors and the surface to re-parametrize the equation of the patch, and builds a quadtree of the patches. This method is useful for reducing the curvature of individual patches until some arbitrary criterion of planarity has been reached. Once reach, patches can be intersected analytically, to find the locus of intersection between two curved surfaces
keywords	recursion, algorithms, Bezier, parametrization, curves, curved surfaces, intersection
series	CADline
email
last changed	2003/06/02 13:58

_id	20b5
authors	Kalay, Yehuda E.
year	1981
title	Interactive Shape Generation and Spatial Conflict Testing
source	ACM IEEE Design Automation Conference Proceedings (18th : 1981 : Nashville, Tennessee). pp. 75-81 : ill. includes bibliography
summary	A general purpose, research oriented, interactive modeling system is presented. It is based on two different coherent polyhedral shape representations: a planar graph, used for computation and data manipulation, and relational-database for compact store and general communication with application programs. The two representations effectively partition the system shape-space into active and inactive shapes, respectively. These are explicitly interchangeable by the user, keeping the actual workspace at a manageable size. The basic functionalities provided by the system include the combination of primitive shapes into complex objects by means of spatial set operators (union, intersection and difference), their modeling by means of scaling, rotation and translation, spatial interference detection and graphical display capabilities
keywords	geometric modeling, solid modeling, representation, boolean operations, B-rep, intersection
series	CADline
email
last changed	2003/06/02 13:58

_id	8c27
authors	Kalay, Yehuda E.
year	1982
title	Determining the Spatial Containment of a Point in General Polyhedra
source	Computer graphics and Image Processing. 1982. vol. 19: pp. 303-334 : ill. includes bibliography. See also criticism and improvements in Orlowski, Marian
summary	Determining the inclusion of a point in volume-enclosing polyhedra (shapes) in 3D space is, in principle, the extension of the well-known problem of determining the inclusion of a point in a polygon in 2D space. However, the extra degree of freedom makes 3D point-polyhedron containment analysis much more difficult to solve than the 2D point polygon problem, mainly because of the nonsequential ordering of the shape elements, which requires global shape data to be applied for resolving special cases. Two general O(n) algorithms for solving the problem by reducing the 3D case into the solvable 2D case are presented. The first algorithm, denoted 'the projection method,' is applicable to any planar- faced polyhedron, reducing the dimensionality by employing parallel projection to generate planar images of the shape faces, together with an image of the point being tested for inclusion. The containment relationship of these images is used to increment a global parity-counter when appropriate, representing an abstraction for counting the intersections between the surface of the shape and a halfline extending from the point to infinity. An 'inside' relationship is established when the parity-count is odd. Special cases (coincidence of the halfline with edges or vertices of the shape) are resolved by eliminating the coincidental elements and re-projecting the merged faces. The second algorithm, denoted 'the intersection method,' is applicable to any well- formed shape, including curved-surfaced ones. It reduces the dimensionality by intersecting the polygonal trace of the shape surface at the plane of intersection, which is tested for containing the trace of the point in the plane, directly establishing the overall 3D containment relationship. A particular O(n) implementation of the 2D point-in-polygon inclusion algorithm, which is used for solving the problem once reduced in dimensionality, is also presented. The presentation is complemented by discussions of the problems associated with point-polyhedron relationship determination in general, and comparative analysis of the two particular algorithms presented
keywords	geometric modeling, point inclusion, polygons, polyhedra, computational geometry, algorithms, search, B-rep
series	CADline
email
last changed	2003/06/02 10:24

_id	e26b
authors	Kalay, Yehuda E.
year	1983
title	Modeling Polyhedral Solids Bounded by Multi-Curved Parametric Surfaces
source	Computer Aided Design May, 1983. Vol. 15: pp. 141-146 : ill. includes bibliography.
summary	An integrated solids modelling system for representing and manipulating objects bounded by bicubic parametric surfaces is presented. Its basic capabilities include the representation of solids through a surface based model, such that the surface underlying any face can be replaced by another surface that has been modelled independently. Other functionalities include scaling, rotation and translation of shapes and their pairwise combination into more complex shapes by means of spatial set operators. This approach integrates within a single system the representation and manipulation of polyhedral solids bounded by multi-curved parametric surfaces, thereby combining solid modelling with surface modelling techniques
keywords	solid modeling, curves, curved surfaces, integration, systems, B-rep, intersection, boolean operations
series	CADline
email
last changed	2003/06/02 10:24

_id	eeda
authors	Kalay, Yehuda E.
year	1987
title	Graphic Introduction to Programming
source	xvii, 231 p. : ill. New York: Wiley-Interscience, 1987. includes bibliography p.: 215-216 and Index -- (Principles of Computer- Aided Design)
summary	Teaching PASCAL programming for graphic applications by using graphics from the very beginning. The book is an introduction to computer-aided design and require no prior computer experience
keywords	computer graphics, programming, PASCAL, education
series	CADline
email
last changed	2003/06/02 13:58

_id	4cf3
authors	Kalay, Yehuda E.
year	1989
title	Modeling Objects and Environments
source	xix, 402 p. : ill. New York: Wiley, 1989. includes a short bibliography and index. Part of the Principles of Computer Aided Design series. --- See also review by Patricia G
summary	McIntosh, in ACADIA Newsletter Vol. 9 No. 3 pp 20-23, June 1990. This book introduces the concept of modeling objects in the computer's memory so it can be used to aide the process of their design. Modeling is defined as an hierarchical abstraction of data and operators to manipulate it, subject to semantic integrity constraints that guarantee the realizability of the designed artifact in the real world. Starting with general concepts of modeling, the book moves on to discuss the modeling of shapes (form) in two and in three dimensions. The discussion covers both topology and geometry. Next the book introduces the concept of shape transformations (translation, scaling, rotation, etc.), both in absolute and in relative terms. The book then introduces the concept of assembly modeling, and adds non-graphical attributes to the representation. It concludes with a discussion on user interface and parametrization. The book includes many examples written in Pascal that complement the theory, and can be used as a basis for building a geometric modeling engine. It also includes exercises, so it can be used as a text book for a two-semester advance course in geometric modeling
keywords	CAD, data structures, solid modeling, abstraction, polygons, solids, boolean operations, transforms, computer graphics, user interface, parametrization, B-rep, polyhedra, objects, PASCAL
series	CADline
email
last changed	2003/06/02 13:58

_id	a495
authors	Kalay, Yehuda E.
year	1989
title	The Hybrid Edge : A Topological Data Structure for Vertically Integrated Geometric Modeling
source	Computer Aided Design. April, 1989. vol. 21: pp. 129-139 : ill. includes bibliography
summary	Generalizing the computational geometric support for the representation of designed artifacts over multiple different levels of symbolic abstraction (e.g., sketches, solid modeling, and drafting) is discussed. First, the need for integrating the representation and manipulation of points, lines, polygons and solids for the purpose of facilitating the design of artifacts at many levels of design abstractions established. Second, a vertically integrated model that supports the representation and manipulation of points, lines, polygons, and solids without redundancy, is presented. The particular roles of the operators and the operandi are discussed, along with their hierarchical integration. The utility of the model is demonstrated in performing operations that involve multiple different levels of data abstraction, such as splitting solids at an arbitrary polygon inscribed on their boundary. Finally, a particular implementation of the integrated model is presented. This implementation is based on the Hybrid Edge, a derivative from Baumgart's Winged Edge and Eastman's Split Edge models. The Hybrid Edge distinguishes between the roles of edges as topological adjacency information carriers and their role as carriers of directionality information. This distinction permits the Hybrid Edge to handle the different combinations of adjacency and directionality requirements imposed by different abstraction levels in the integrated model
keywords	geometric modeling, hybrid edge, topology, solid modeling, B-rep
series	CADline
email
last changed	2003/05/17 10:18

_id	1121
authors	Kalay, Yehuda E.
year	1999
title	The Future of CAAD: From Computer-aided Design to Computer-aided Collaboration
source	Proceedings of the Eighth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-8536-5] Atlanta, 7-8 June 1999, pp. 14-30
summary	The primary uses of computers in the construction industry have been shifting, over the past four decades, from the evaluation of proposed design solutions, to their graphical (and other) representation, and more recently to facilitating collaboration among the various professionals who are involved in the design process. The paper argues that what may appear to be shifts in emphasis actually represents convergence on a single, original goal: the use of computers to help designers assess the quality, desirability, and the implications of their creations. The paper shows how the formerly independent components can be joined into an integrated collaborative design environment, where they build upon and strengthen each other. Moreover, the paper argues that this convergence represents the future of CAAD research and development, providing the appropriate answer to the upcoming needs of the construction industry, whose products have become too complex and must abide by too many requirements for any one professional to handle all by himself. The paper argues that further improvements in the overall quality of the products, and the process of their design, will only accrue when the heretofore separate solutions are considered together, as integral parts of an overall solution. The paper describes the efforts that have been made by the CAD Research Group in Berkeley over the past six years in developing an integrated collaborative design environment that can facilitate multidisciplinary, a- synchronous design of buildings. The environment includes several semantically-rich, shared product representations, a network of distributed evaluators, and graphically enhanced collaboration and negotiation tools.
keywords	Collaborative Design, Distributed Design Environment, Product Modeling, Performance Modeling, Process Modeling, Negotiation, Integration
series	CAAD Futures
email
last changed	2006/11/07 07:22

_id	ijac20075214
id	ijac20075214
authors	Kalay, Yehuda E.; Grabowicz, Paul
year	2007
title	Oakland Blues: Virtual Preservation of Seventh Street's 1950'5 Jazz Scene
source	International Journal of Architectural Computing vol. 5 - no. 2, pp. 438-453
summary	Digital technologies are becoming a popular vehicle for the re-creation and dissemination of cultural heritage, in the form of modeling buildings, people, and their activities. Video game engines can be used to let user virtually "inhabit" the digitally recreated worlds made accessible via the Internet, opening them up to people who otherwise would never be exposed to these cultural sites. Yet, like every medium ever used to preserve cultural heritage, digital media is not neutral: it impacts the represented content and the ways the audience interprets it. Perhaps more than any older technology, it has the potential to affect the very meaning of the represented content in terms of the cultural image it creates. This paper examines the applications and implications of digital media for the recreation and communication of cultural heritage, drawing on the lessons learned from a project to recreate the thriving jazz and blues club scene in West Oakland, California, in the 1940s and 1950s.
series	journal
last changed	2007/08/29 16:23

_id	880f
authors	Kaler, George M., Jr.
year	1990
title	Embedded Expert System Development for Monitoring Packaged HVAC Equipment
source	ASHRAE Transactions (American Society of Heating, Refrigerating and Air- Conditioning Engineers). 1990. vol. 96: [9] p. : ill. includes bibliography
summary	This paper describes the development of a real-time embedded expert system for evaluating the performance of an HVAC unit at any point in time and for the automatic diagnosis of potential fault conditions. The paper discusses some of the considerations that were addressed in the design of the product and summarize several case study
keywords	expert systems, HVAC, applications
series	CADline
last changed	2003/06/02 13:58

_id	2006_066
id	2006_066
authors	Kalisperis, Loukas N.; Katsuhiko Muramoto; Bimal Balakrishnan; Dragana Nikolic and Nevena Zikic
year	2006
title	Evaluating Relative Impact of Virtual Reality System Variables on Architectural Design Comprehension and Presence - A variable-centered approach using fractional factorial experiment
source	Communicating Space(s) [24th eCAADe Conference Proceedings / ISBN 0-9541183-5-9] Volos (Greece) 6-9 September 2006, pp. 66-73
doi	https://doi.org/10.52842/conf.ecaade.2006.066
summary	The relative contributions of five variables (Stereoscopy, screen size, field of view, level of realism and level of detail) of virtual reality systems on spatial comprehension and presence are evaluated here. Using a variable-centered approach instead of an object-centric view as its theoretical basis, the contributions of these five variables and their two-way interactions are estimated through a 25-1 fractional factorial experiment (screening design) of resolution V with 84 subjects. The experiment design, procedure, measures used, creation of scales and indices, results of statistical analysis, their meaning and agenda for future research are elaborated.
keywords	Virtual reality system variables - stereoscopy; screen size; field of view; level of realism; level of detail; spatial comprehension; presence; variable-centered approach; fractional factorial experiment design
series	eCAADe
email
last changed	2022/06/07 07:52

_id	caadria2008_32_session4a_263
id	caadria2008_32_session4a_263
authors	Kan, Jeff W.T.; John S Gero
year	2008
title	Do computer mediated tools affect team design creativity?
source	CAADRIA 2008 [Proceedings of the 13th International Conference on Computer Aided Architectural Design Research in Asia] Chiang Mai (Thailand) 9-12 April 2008, pp. 263-270
doi	https://doi.org/10.52842/conf.caadria.2008.263
summary	This paper presents the results of a quantitative analysis to measure the development of creative design ideas in design protocols. It presents a working definition of design creativity used in the analysis followed by the method of study. Five sets of video and audio data were collected from experiments that involved two designers designing similar tasks in three different settings: face-to-face, an Internet GroupBoard, and a 3D virtual world. The most creative pair was selected for qualitative and quantitative analysis. Our result shows that designers developed more design ideas in the face-to-face setting than in the 3D virtual world settings.
keywords	Creativity, protocol analysis, collaborations, virtual world
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	caadria2003_a5-2
id	caadria2003_a5-2
authors	Kang, J.H., Park, J. G. and Lho, B.-Ch.
year	2003
title	XML-Based Interactive 3D Campus Map
source	CAADRIA 2003 [Proceedings of the 8th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 974-9584-13-9] Bangkok Thailand 18-20 October 2003, pp. 631-640
doi	https://doi.org/10.52842/conf.caadria.2003.631
summary	This paper presents the development of a prototype XMLbased 3D campus map using the 3D VML library. Many universities in the U.S. use two-dimensional (2D) raster image to provide the campus map along with additional building information on their Web site. Research shows that three-dimensional (3D) expression of the 3D objects helps human beings understand the spatial relationship between the objects. Some universities use 3D campus maps to help visitors more intuitively access the building information. However, these 3D campus maps are usually created using raster images. The users cannot change the view point in the 3D campus map for better understanding of the arrangement of the campus. If the users can navigate around in the 3D campus map, they may be able to locate the building of their interest more intuitively. This paper introduces emerging Web technologies that deliver 3D vector graphics on the Web browser over the internet, and the algorithm of the prototype XML-based 3D campus map. Some advantages of using VML in delivering the interactive 3D campus map are also discussed.
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	b947
authors	Kangari, R. and Gregory, R.
year	1997
title	Feasibility of automating military's environmental operations
source	Automation in Construction 5 (6) (1997) pp. 459-468
summary	This paper focuses on analyses of the feasibility of telerobotic and autonomous systems in hazardous environments. The hazardous environments are divided into three missions: area clearance, removal of unexploded ordnance, and hazardous waste removal. This paper identifies the factors impacting military's missions on various operating systems. Then, a decision support system based on fuzzy logic is developed for studying these factors to determine the feasibility of automating military's environmental restoration operations. The last part of the paper provides a set of recommendations for technology policy development.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

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