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	e201
authors	Coulon, Carl-Helmut
year	1995
title	Automatic Indexing, Retrieval and Reuse of Topologies in Architectural Layouts
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 577-586
summary	Former layouts contain much of the know-how of architects. A generic and automatic way to formalize this know-how in order to use it by a computer would save a lot of effort and money. However, there seems to be no such way. The only access to the know-how are the layouts themselves. Developing a generic software tool to reuse former layouts you cannot consider every part of the architectural domain or things like personal style. Tools used today only consider small parts of the architectural domain. Any personal style is ignored. Isnít it possible to build a basic tool which is adjusted by the content of the former layouts, but maybe extended inclemently by modeling as much of the domain as desirable? This paper will describe a reuse tool to perform this task focusing on topological and geometrical binary relations.
keywords	Case-Based Reasoning, Graph Matching, Structural Comparison, Topology
series	CAAD Futures
last changed	1999/08/03 17:16

_id	6966
authors	Chuah, M.C., Roth, S.F., Kolojejchick, J., Mattis, J. and Juarez, O.
year	1995
title	SageBook: Searching data-graphics by content
source	Proceedings of CHI , ACM Press
summary	Currently, there are many hypertext-like tools and database retrieval systems that use keyword search as a means of navigation. While useful for certain tasks, keyword search is insufficient for browsing databases of data-graphics. SageBook is a system that searches among existing data-graphics, so that they can be reused with new data. In order to fulfill the needs of retrieval and reuse, it provides: 1) a direct manipulation, graphical query interface; 2) a content description language that can express important relationships for retrieving data-graphics; 3) automatic description of stored data-graphics based on their content; 4) search techniques sensitive to the structure and similarity among data-graphics; 5) manual and automatic adaptation tools for altering data-graphics so that they can be reused with new data.
series	other
last changed	2003/04/23 15:50

_id	4809
authors	Do, Ellen Yi-Luen
year	1995
title	Drawing Analogies: Finding Visual References By Sketching
doi	https://doi.org/10.52842/conf.acadia.1995.035
source	Computing in Design - Enabling, Capturing and Sharing Ideas [ACADIA Conference Proceedings / ISBN 1-880250-04-7] University of Washington (Seattle, Washington / USA) October 19-22, 1995, pp. 35-52
summary	In creative and conceptual designing, architects often look to books, magazines, and other collections of images to find forms they can adopt and adapt in designs. On line visual collections are becoming available but typically they are indexed only with descriptive key words. We argue that in addition to key word indexing, which supports retrieval of images based on design concepts or issues, a more directly visual, graphical reminding scheme based on sketches can help designers recall interesting references from various domains. We describe Drawing Analogies, a shape based reminding program that uses hand drawn sketches to index and query visual databases.
series	ACADIA
email
last changed	2022/06/07 07:55

_id	2036
authors	Dzeng, R.J.
year	1995
title	Caseplan: A Case-based Planer and Scheduler for Construction Using Product Modeling
source	University of Michigan
summary	Construction planning and scheduling are important to contractors for estimating the cost and duration of a project they are to bid on and construct. Many projects specify incentive and disincentive clauses for completing projects early and late. The timely completion and success of a project rely on good planning and scheduling. Contractors who repeatedly build the same kind of facilities acquire experience in scheduling the needed construction work. When parts of a facility's design are copied from one project to the next, the previously developed schedules could possibly be reused to schedule future work. This dissertation presents a construction planner and scheduler, named CasePlan, that automates the planning and scheduling process through the use of experience encoded in cases. CasePlan enables a contractor to specify a facility design using a product model, describe the relationships between product components and parts of a schedule (e.g., activity subnetworks, construction crews), and store this information as a case. As a decision support tool, CasePlan enables the contractor to search for cases whose facility designs are similar to that of a new project. The similarity assessment is based on the relative importance values that the contractor assigns to the components and their attributes in the product model. As an automation tool, CasePlan creates the schedule of a new project by reusing parts of the schedules whose associated designs are most similar to that project's design. The result is a schedule in which construction alternatives are chosen from those used in previous cases based on the new project scheduling constraints. The contractor / system-user can interact with CasePlan during its operation or modify the resulting schedule to add detail needed for executing the schedule in the field. Two types of construction projects have been studied for the development of CasePlan. One is the Kit-of-Parts post offices, in which designs are made by reusing design modules defined as Parts. The other is the boiler erection for fossil-fueled power plants, in which the design process is standardized and component configurations are similar across designs. These projects were chosen because their schedules are similar within each project type, which suggested that practitioners had a high incentive and were likely to reuse schedules. CasePlan's similarity assessment for boiler erection projects was validated using a survey. CasePlan's schedules and usability was subjectively evaluated also by the interviewed professionals.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	2068
authors	Frazer, John
year	1995
title	AN EVOLUTIONARY ARCHITECTURE
source	London: Architectural Association
summary	In "An Evolutionary Architecture", John Frazer presents an overview of his work for the past 30 years. Attempting to develop a theoretical basis for architecture using analogies with nature's processes of evolution and morphogenesis. Frazer's vision of the future of architecture is to construct organic buildings. Thermodynamically open systems which are more environmentally aware and sustainable physically, sociologically and economically. The range of topics which Frazer discusses is a good illustration of the breadth and depth of the evolutionary design problem. Environmental Modelling One of the first topics dealt with is the importance of environmental modelling within the design process. Frazer shows how environmental modelling is often misused or misinterpreted by architects with particular reference to solar modelling. From the discussion given it would seem that simplifications of the environmental models is the prime culprit resulting in misinterpretation and misuse. The simplifications are understandable given the amount of information needed for accurate modelling. By simplifying the model of the environmental conditions the architect is able to make informed judgments within reasonable amounts of time and effort. Unfortunately the simplications result in errors which compound and cause the resulting structures to fall short of their anticipated performance. Frazer obviously believes that the computer can be a great aid in the harnessing of environmental modelling data, providing that the same simplifying assumptions are not made and that better models and interfaces are possible. Physical Modelling Physical modelling has played an important role in Frazer's research. Leading to the construction of several novel machine readable interactive models, ranging from lego-like building blocks to beermat cellular automata and wall partitioning systems. Ultimately this line of research has led to the Universal Constructor and the Universal Interactor. The Universal Constructor The Universal Constructor features on the cover of the book. It consists of a base plug-board, called the "landscape", on top of which "smart" blocks, or cells, can be stacked vertically. The cells are individually identified and can communicate with neighbours above and below. Cells communicate with users through a bank of LEDs displaying the current state of the cell. The whole structure is machine readable and so can be interpreted by a computer. The computer can interpret the states of the cells as either colour or geometrical transformations allowing a wide range of possible interpretations. The user interacts with the computer display through direct manipulation of the cells. The computer can communicate and even direct the actions of the user through feedback with the cells to display various states. The direct manipulation of the cells encourages experimentation by the user and demonstrates basic concepts of the system. The Universal Interactor The Universal Interactor is a whole series of experimental projects investigating novel input and output devices. All of the devices speak a common binary language and so can communicate through a mediating central hub. The result is that input, from say a body-suit, can be used to drive the out of a sound system or vice versa. The Universal Interactor opens up many possibilities for expression when using a CAD system that may at first seem very strange.However, some of these feedback systems may prove superior in the hands of skilled technicians than more standard devices. Imagine how a musician might be able to devise structures by playing melodies which express the character. Of course the interpretation of input in this form poses a difficult problem which will take a great deal of research to achieve. The Universal Interactor has been used to provide environmental feedback to affect the development of evolving genetic codes. The feedback given by the Universal Interactor has been used to guide selection of individuals from a population. Adaptive Computing Frazer completes his introduction to the range of tools used in his research by giving a brief tour of adaptive computing techniques. Covering topics including cellular automata, genetic algorithms, classifier systems and artificial evolution. Cellular Automata As previously mentioned Frazer has done some work using cellular automata in both physical and simulated environments. Frazer discusses how surprisingly complex behaviour can result from the simple local rules executed by cellular automata. Cellular automata are also capable of computation, in fact able to perform any computation possible by a finite state machine. Note that this does not mean that cellular automata are capable of any general computation as this would require the construction of a Turing machine which is beyond the capabilities of a finite state machine. Genetic Algorithms Genetic algorithms were first presented by Holland and since have become a important tool for many researchers in various areas.Originally developed for problem-solving and optimization problems with clearly stated criteria and goals. Frazer fails to mention one of the most important differences between genetic algorithms and other adaptive problem-solving techniques, ie. neural networks. Genetic algorithms have the advantage that criteria can be clearly stated and controlled within the fitness function. The learning by example which neural networks rely upon does not afford this level of control over what is to be learned. Classifier Systems Holland went on to develop genetic algorithms into classifier systems. Classifier systems are more focussed upon the problem of learning appropriate responses to stimuli, than searching for solutions to problems. Classifier systems receive information from the environment and respond according to rules, or classifiers. Successful classifiers are rewarded, creating a reinforcement learning environment. Obviously, the mapping between classifier systems and the cybernetic view of organisms sensing, processing and responding to environmental stimuli is strong. It would seem that a central process similar to a classifier system would be appropriate at the core of an organic building. Learning appropriate responses to environmental conditions over time. Artificial Evolution Artificial evolution traces it's roots back to the Biomorph program which was described by Dawkins in his book "The Blind Watchmaker". Essentially, artificial evolution requires that a user supplements the standard fitness function in genetic algorithms to guide evolution. The user may provide selection pressures which are unquantifiable in a stated problem and thus provide a means for dealing ill-defined criteria. Frazer notes that solving problems with ill-defined criteria using artificial evolution seriously limits the scope of problems that can be tackled. The reliance upon user interaction in artificial evolution reduces the practical size of populations and the duration of evolutionary runs. Coding Schemes Frazer goes on to discuss the encoding of architectural designs and their subsequent evolution. Introducing two major systems, the Reptile system and the Universal State Space Modeller. Blueprint vs. Recipe Frazer points out the inadequacies of using standard "blueprint" design techniques in developing organic structures. Using a "recipe" to describe the process of constructing a building is presented as an alternative. Recipes for construction are discussed with reference to the analogous process description given by DNA to construct an organism. The Reptile System The Reptile System is an ingenious construction set capable of producing a wide range of structures using just two simple components. Frazer saw the advantages of this system for rule-based and evolutionary systems in the compactness of structure descriptions. Compactness was essential for the early computational work when computer memory and storage space was scarce. However, compact representations such as those described form very rugged fitness landscapes which are not well suited to evolutionary search techniques. Structures are created from an initial "seed" or minimal construction, for example a compact spherical structure. The seed is then manipulated using a series of processes or transformations, for example stretching, shearing or bending. The structure would grow according to the transformations applied to it. Obviously, the transformations could be a predetermined sequence of actions which would always yield the same final structure given the same initial seed. Alternatively, the series of transformations applied could be environmentally sensitive resulting in forms which were also sensitive to their location. The idea of taking a geometrical form as a seed and transforming it using a series of processes to create complex structures is similar in many ways to the early work of Latham creating large morphological charts. Latham went on to develop his ideas into the "Mutator" system which he used to create organic artworks. Generalising the Reptile System Frazer has proposed a generalised version of the Reptile System to tackle more realistic building problems. Generating the seed or minimal configuration from design requirements automatically. From this starting point (or set of starting points) solutions could be evolved using artificial evolution. Quantifiable and specific aspects of the design brief define the formal criteria which are used as a standard fitness function. Non-quantifiable criteria, including aesthetic judgments, are evaluated by the user. The proposed system would be able to learn successful strategies for satisfying both formal and user criteria. In doing so the system would become a personalised tool of the designer. A personal assistant which would be able to anticipate aesthetic judgements and other criteria by employing previously successful strategies. Ultimately, this is a similar concept to Negroponte's "Architecture Machine" which he proposed would be computer system so personalised so as to be almost unusable by other people. The Universal State Space Modeller The Universal State Space Modeller is the basis of Frazer's current work. It is a system which can be used to model any structure, hence the universal claim in it's title. The datastructure underlying the modeller is a state space of scaleless logical points, called motes. Motes are arranged in a close-packing sphere arrangement, which makes each one equidistant from it's twelve neighbours. Any point can be broken down into a self-similar tetrahedral structure of logical points. Giving the state space a fractal nature which allows modelling at many different levels at once. Each mote can be thought of as analogous to a cell in a biological organism. Every mote carries a copy of the architectural genetic code in the same way that each cell within a organism carries a copy of it's DNA. The genetic code of a mote is stored as a sequence of binary "morons" which are grouped together into spatial configurations which are interpreted as the state of the mote. The developmental process begins with a seed. The seed develops through cellular duplication according to the rules of the genetic code. In the beginning the seed develops mainly in response to the internal genetic code, but as the development progresses the environment plays a greater role. Cells communicate by passing messages to their immediate twelve neighbours. However, it can send messages directed at remote cells, without knowledge of it's spatial relationship. During the development cells take on specialised functions, including environmental sensors or producers of raw materials. The resulting system is process driven, without presupposing the existence of a construction set to use. The datastructure can be interpreted in many ways to derive various phenotypes. The resulting structure is a by-product of the cellular activity during development and in response to the environment. As such the resulting structures have much in common with living organisms which are also the emergent result or by-product of local cellular activity. Primordial Architectural Soups To conclude, Frazer presents some of the most recent work done, evolving fundamental structures using limited raw materials, an initial seed and massive feedback. Frazer proposes to go further and do away with the need for initial seed and start with a primordial soup of basic architectural concepts. The research is attempting to evolve the starting conditions and evolutionary processes without any preconditions. Is there enough time to evolve a complex system from the basic building blocks which Frazer proposes? The computational complexity of the task being embarked upon is not discussed. There is an implicit assumption that the "superb tactics" of natural selection are enough to cut through the complexity of the task. However, Kauffman has shown how self-organisation plays a major role in the early development of replicating systems which we may call alive. Natural selection requires a solid basis upon which it can act. Is the primordial soup which Frazer proposes of the correct constitution to support self-organisation? Kauffman suggests that one of the most important attributes of a primordial soup to be capable of self-organisation is the need for a complex network of catalysts and the controlling mechanisms to stop the reactions from going supracritical. Can such a network be provided of primitive architectural concepts? What does it mean to have a catalyst in this domain? Conclusion Frazer shows some interesting work both in the areas of evolutionary design and self-organising systems. It is obvious from his work that he sympathizes with the opinions put forward by Kauffman that the order found in living organisms comes from both external evolutionary pressure and internal self-organisation. His final remarks underly this by paraphrasing the words of Kauffman, that life is always to found on the edge of chaos. By the "edge of chaos" Kauffman is referring to the area within the ordered regime of a system close to the "phase transition" to chaotic behaviour. Unfortunately, Frazer does not demonstrate that the systems he has presented have the necessary qualities to derive useful order at the edge of chaos. He does not demonstrate, as Kauffman does repeatedly, that there exists a "phase transition" between ordered and chaotic regimes of his systems. He also does not make any studies of the relationship of useful forms generated by his work to phase transition regions of his systems should they exist. If we are to find an organic architecture, in more than name alone, it is surely to reside close to the phase transition of the construction system of which is it built. Only there, if we are to believe Kauffman, are we to find useful order together with environmentally sensitive and thermodynamically open systems which can approach the utility of living organisms.
series	other
type	normal paper
last changed	2004/05/22 14:12

_id	c681
authors	Gero, J.S. and Kazakov, V.
year	1995
title	Evolving building blocks for design using genetic engineering: A formal approach
source	J.S. Gero and F. Sudweeks (eds), Advances in Formal Design Methods for CAD , IFIP-University of Sydney, Sydney, pp. 29-48
summary	This paper presents a formal approach to the evolution of a representation for use in a design process. The approach adopted is based on concepts associated with genetic engineering. An initial set of genes representing elementary building blocks is evolved into a set of complex genes representing targeted building blocks. These targeted building blocks have been evolved because they are more likely to produce designs which exhibit desired characteristics than the commencing elementary building blocks. The targeted building blocks can then be used in a design process. The paper presents a formal evolutionary model of design representations based on genetic algorithms and uses pattern recognition techniques to execute aspects of the genetic engineering. The paper describes how the state space of possible designs changes over time and illustrates the model with an example from the domain of two-dimensional layouts. It concludes with a discussion of style in design.
series	other
email
last changed	2003/04/06 07:29

_id	623e
authors	Arumi-Noe, Francisco
year	1995
title	Algorithm For The Automatic Design Of A Shading Device
doi	https://doi.org/10.52842/conf.acadia.1995.233
source	Computing in Design - Enabling, Capturing and Sharing Ideas [ACADIA Conference Proceedings / ISBN 1-880250-04-7] University of Washington (Seattle, Washington / USA) October 19-22, 1995, pp. 233-242
summary	Given that there is a need to shade a window from the summer sun and also a need to expose it to the winter sun, this article describes an algorithm to design automatically a geometric construct that satisfies both requirements. The construct obtained represents the minimum solution to the simultaneous requirements. The window may be described by an arbitrary convex polygon and it may be oriented in any direction and it may be placed at any chosen latitude. The algorithm consists of two sequential steps: first to find a winter solar funnel surface; and the second to clip the surface subject to the summer shading conditions. The article introduces the design problem, illustrates the results through two examples, outlines the logic of the algorithm and includes the derivation of the mathematical relations required to implement the algorithm. This work is part of the MUSES project, which is a long term research effort to integrate Energy Consciousness with Computer Graphics in Architectural Design.
keywords	Energy Conscious Design, Green Architecture, Sustainable Architecture, Solar Design, Computer Aided Design
series	ACADIA
last changed	2022/06/07 07:54

_id	c777
authors	Bach, Fr.-W., Rachkov, M., Seevers, J. and Hahn, M.
year	1995
title	High tractive power wall-climbing robot
source	Automation in Construction 4 (3) (1995) pp. 213-224
summary	There are a lot of tasks in building construction and maintenance which demand either the carriage of heavy technological equipment along vertical and sloping surfaces and/or provision for force technological operations on such surfaces For example, surface cleaning or grinding by automatic equipment, the mounting of expansion bolts and anchors by drilling or by driving in. Additionally surface inspection by heavy measuring devices and the painting of big construction areas are difficult and expensive to perform manually. It is therefore expedient to apply climbing robots to automate these tractive power operations. The climbing robot was developed for such purposes. The design of the robot with increased load capacity and improved gripper system was carefully considered. The robot has a video camera for orientation and for the monitoring of processes. A sensor-based computer control system is used. This paper contains a brief overview of the technical parameters and experimental characteristics of the robot's transport module, control system with video camera unit, and the different schemes of the robot's application.
keywords	Climbing robot; Two-staged gripper system Monitoring Sensor-based computer control system; Automatic Technological equipment
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/06/02 09:36

_id	sigradi2008_049
id	sigradi2008_049
authors	Benamy, Turkienicz ; Beck Mateus, Mayer Rosirene
year	2008
title	Computing And Manipulation In Design - A Pedagogical Experience Using Symmetry
source	SIGraDi 2008 - [Proceedings of the 12th Iberoamerican Congress of Digital Graphics] La Habana - Cuba 1-5 December 2008
summary	The concept of symmetry has been usually restricted to bilateral symmetry, though in an extended sense it refers to any isometric transformation that maintains a certain shape invariant. Groups of operations such as translation, rotation, reflection and combinations of these originate patterns classified by modern mathematics as point groups, friezes and wallpapers (March and Steadman, 1974). This extended notion represents a tool for the recognition and reproduction of patterns, a primal aspect of the perception, comprehension and description of everything that we see. Another aspect of this process is the perception of shapes, primary and emergent. Primary shapes are the ones explicitly represented and emergent shapes are the ones implicit in the others (Gero and Yan, 1994). Some groups of shapes known as Semantic Shapes are especially meaningful in architecture, expressing visual features so as symmetry, rhythm, movement and balance. The extended understanding of the concept of symmetry might improve the development of cognitive abilities concerning the creation, recognition and meaning of forms and shapes, aspects of visual reasoning involved in the design process. This paper discusses the development of a pedagogical experience concerned with the application of the concept of symmetry in the creative generation of forms using computational tools and manipulation. The experience has been carried out since 1995 with 3rd year architectural design students. For the exploration of compositions based on symmetry operations with computational support we followed a method developed by Celani (2003) comprising the automatic generation and update of symmetry patterns using AutoCAD. The exercises with computational support were combined with other different exercises in each semester. The first approach combined the creation of two-dimensional patterns to their application and to their modeling into three-dimensions. The second approach combined the work with computational support with work with physical models and mirrors and the analysis of the created patterns. And the third approach combined the computational tasks with work with two-dimensional physical shapes and mirrors. The student’s work was analyzed under aspects such as Discretion/ Continuity –the creation of isolated groups of shapes or continuous overlapped patterns; Generation of Meta-Shapes –the emergence of new shapes from the geometrical relation between the generative shape and the structure of the symmetrical arrangement; Modes of Representation –the visual aspects of the generative shape such as color and shading; Visual Reasoning –the derivation of 3D compositions from 2D patterns by their progressive analysis and recognition; Conscious Interaction –the simultaneous creation and analysis of symmetry compositions, whether with computational support or with physical shapes and mirrors. The combined work with computational support and with physical models and mirrors enhanced the students understanding on the extended concept of symmetry. The conscious creation and analysis of the patterns also stimulated the student’s understanding over the different semantic possibilities involved in the exploration of forms and shapes in two or three dimensions. The method allowed the development of both syntactic and semantic aspects of visual reasoning, enhancing the students’ visual repertoire. This constitutes an important strategy in the building of the cognitive abilities used in the architectural design process.
keywords	Symmetry, Cognition, Computing, Visual reasoning, Design teaching
series	SIGRADI
email
last changed	2016/03/10 09:47

_id	7a20
id	7a20
authors	Carrara, G., Fioravanti, A.
year	2002
title	SHARED SPACE’ AND ‘PUBLIC SPACE’ DIALECTICS IN COLLABORATIVE ARCHITECTURAL DESIGN.
source	Proceedings of Collaborative Decision-Support Systems Focus Symposium, 30th July, 2002; under the auspices of InterSymp-2002, 14° International Conference on Systems Research, Informatics and Cybernetics, 2002, Baden-Baden, pg. 27-44.
summary	The present paper describes on-going research on Collaborative Design. The proposed model, the resulting system and its implementation refer mainly to architectural and building design in the modes and forms in which it is carried on in advanced design firms. The model may actually be used effectively also in other environments. The research simultaneously pursues an integrated model of the: a) structure of the networked architectural design process (operators, activities, phases and resources); b) required knowledge (distributed and functional to the operators and the process phases). The article focuses on the first aspect of the model: the relationship that exists among the various ‘actors’ in the design process (according to the STEP-ISO definition, Wix, 1997) during the various stages of its development (McKinney and Fischer, 1998). In Collaborative Design support systems this aspect touches on a number of different problems: database structure, homogeneity of the knowledge bases, the creation of knowledge bases (Galle, 1995), the representation of the IT datum (Carrara et al., 1994; Pohl and Myers, 1994; Papamichael et al., 1996; Rosenmann and Gero, 1996; Eastman et al., 1997; Eastman, 1998; Kim, et al., 1997; Kavakli, 2001). Decision-making support and the relationship between ‘private’ design space (involving the decisions of the individual design team) and the ‘shared’ design space (involving the decisions of all the design teams, Zang and Norman, 1994) are the specific topic of the present article. Decisions taken in the ‘private design space’ of the design team or ‘actor’ are closely related to the type of support that can be provided by a Collaborative Design system: automatic checks performed by activating procedures and methods, reporting of 'local' conflicts, methods and knowledge for the resolution of ‘local’ conflicts, creation of new IT objects/ building components, who the objects must refer to (the ‘owner’), 'situated' aspects (Gero and Reffat, 2001) of the IT objects/building components. Decisions taken in the ‘shared design space’ involve aspects that are typical of networked design and that are partially present in the ‘private’ design space. Cross-checking, reporting of ‘global’ conflicts to all those concerned, even those who are unaware they are concerned, methods for their resolution, the modification of data structure and interface according to the actors interacting with it and the design phase, the definition of a 'dominus' for every IT object (i.e. the decision-maker, according to the design phase and the creation of the object). All this is made possible both by the model for representing the building (Carrara and Fioravanti, 2001), and by the type of IT representation of the individual building components, using the methods and techniques of Knowledge Engineering through a structured set of Knowledge Bases, Inference Engines and Databases. The aim is to develop suitable tools for supporting integrated Process/Product design activity by means of a effective and innovative representation of building entities (technical components, constraints, methods) in order to manage and resolve conflicts generated during the design activity.
keywords	Collaborative Design, Architectural Design, Distributed Knowledge Bases, ‘Situated’ Object, Process/Product Model, Private/Shared ‘Design Space’, Conflict Reduction.
series	other
type	symposium
email
last changed	2005/03/30 16:25

_id	6279
id	6279
authors	Carrara, G.; Fioravanti, A.
year	2002
title	Private Space' and ‘Shared Space’ Dialectics in Collaborative Architectural Design
source	InterSymp 2002 - 14th International Conference on Systems Research, Informatics and Cybernetics (July 29 - August 3, 2002), pp 28-44.
summary	The present paper describes on-going research on Collaborative Design. The proposed model, the resulting system and its implementation refer mainly to architectural and building design in the modes and forms in which it is carried on in advanced design firms. The model may actually be used effectively also in other environments. The research simultaneously pursues an integrated model of the: a) structure of the networked architectural design process (operators, activities, phases and resources); b) required knowledge (distributed and functional to the operators and the process phases). The article focuses on the first aspect of the model: the relationship that exists among the various ‘actors’ in the design process (according to the STEP-ISO definition, Wix, 1997) during the various stages of its development (McKinney and Fischer, 1998). In Collaborative Design support systems this aspect touches on a number of different problems: database structure, homogeneity of the knowledge bases, the creation of knowledge bases (Galle, 1995), the representation of the IT datum (Carrara et al., 1994; Pohl and Myers, 1994; Papamichael et al., 1996; Rosenmann and Gero, 1996; Eastman et al., 1997; Eastman, 1998; Kim, et al., 1997; Kavakli, 2001). Decision-making support and the relationship between ‘private’ design space (involving the decisions of the individual design team) and the ‘shared’ design space (involving the decisions of all the design teams, Zang and Norman, 1994) are the specific topic of the present article. Decisions taken in the ‘private design space’ of the design team or ‘actor’ are closely related to the type of support that can be provided by a Collaborative Design system: automatic checks performed by activating procedures and methods, reporting of 'local' conflicts, methods and knowledge for the resolution of ‘local’ conflicts, creation of new IT objects/ building components, who the objects must refer to (the ‘owner’), 'situated' aspects (Gero and Reffat, 2001) of the IT objects/building components. Decisions taken in the ‘shared design space’ involve aspects that are typical of networked design and that are partially present in the ‘private’ design space. Cross-checking, reporting of ‘global’ conflicts to all those concerned, even those who are unaware they are concerned, methods for their resolution, the modification of data structure and interface according to the actors interacting with it and the design phase, the definition of a 'dominus' for every IT object (i.e. the decision-maker, according to the design phase and the creation of the object). All this is made possible both by the model for representing the building (Carrara and Fioravanti, 2001), and by the type of IT representation of the individual building components, using the methods and techniques of Knowledge Engineering through a structured set of Knowledge Bases, Inference Engines and Databases. The aim is to develop suitable tools for supporting integrated Process/Product design activity by means of a effective and innovative representation of building entities (technical components, constraints, methods) in order to manage and resolve conflicts generated during the design activity.
keywords	Collaborative Design, Architectural Design, Distributed Knowledge Bases, ‘Situated’ Object, Process/Product Model, Private/Shared ‘Design Space’, Conflict Reduction.
series	other
type	symposium
email
last changed	2012/12/04 07:53

_id	95b9
authors	Devernay, F. and Faugeras, O.
year	1995
title	Automatic Calibration and Removal of Distortion from scenes of structured environments
source	Proceedings of the SPIE Conference on Investigate and Trial Image Processing, 2567, SPIE, San Diego, CA, July 1995
summary	Most algorithms in 3-D Computer Vision rely on the pinhole camera model because of its simplicity, whereas video optics, especially low-cost wide-angle lens, generate a lot of non-linear distortion which can be critical. To ønd the distortion parameters of a camera, we use the following fundamental property: a camera follows the pinhole model if and only if the projection of every line in space onto the camera is a line. Consequently, if we ønd the transformation on the video image so that every line in space is viewed in the transformed image as a line, then we know how to remove the distortion from the image. The algorithm consists of ørst doing edge extraction on a possibly distorted video sequence, then doing polygonal approximation with a large tolerance on these edges to extract possible lines from the sequence, and then ønding the parameters of our distortion model that best transform these edges to segments. Results are presented on real video images, compared with distortion c...
series	other
last changed	2003/04/23 15:14

_id	2115
authors	Ingram, R. and Benford, S.
year	1995
title	Improving the legibility of virtual environments
source	Second Euro graphics Workshop on Virtual Environments
summary	Years of research into hyper-media systems have shown that finding one's way through large electronic information systems can be a difficult task. Our experiences with virtual reality suggest that users will also suffer from the commonly experienced "lost in hyperspace" problem when trying to navigate virtual environments. The goal of this paper is to propose and demonstrate a technique which is currently under development with the aim of overcoming this problem. Our approach is based upon the concept of legibility, adapted from the discipline of city planning. The legibility of an urban environment refers to the ease with which its inhabitants can develop a cognitive map over a period of time and so orientate themselves within it and navigate through it [Lynch60]. Research into this topic since the 1960s has argued that, by carefully designing key features of urban environments planners can significantly influence their legibility. We propose that these legibility features might be adapted and applied to the design of a wide variety of virtual environments and that, when combined with other navigational aids such as the trails, tours and signposts of the hyper-media world, might greatly enhance people's ability to navigate them. In particular, the primary role of legibility would be to help users to navigate more easily as a result of experiencing a world for some time (hence the idea of building a cognitive map). Thus, we would see our technique being of most benefit when applied to long term, persistent and slowly evolving virtual environments. Furthermore, we are particularly interested in the automatic application of legibility techniques to information visualisations as opposed to their relatively straight forward application to simulations of the real-word. Thus, a typical future application of our work might be in enhancing visualisations of large information systems such the World Wide Web. Section 2 of this paper summarises the concept of legibility as used in the domain of city planning and introduces some of the key features that have been adapted and applied in our work. Section 3 then describes in detail the set of algorithms and techniques which are being developed for the automatic creation or enhancement of these features within virtual data spaces. Next, section 4 presents two example applications based on two different kinds of virtual data space. Finally, section 5 presents some initial reflections on this work and discusses the next steps in its evolution.
series	other
last changed	2003/04/23 15:50

_id	09bc
authors	Kuntze, H.-B., Hirsch, U., Jacubasch, A., Eberle, F. and Goller, B.
year	1995
title	On the dynamic control of a hydraulic large range robot for construction applications
source	Automation in Construction 4 (1) (1995) pp. 61-73
summary	There are various important outdoor applications in the fields of civil engineering, environmental technology or catastrophy management which require the introduction of a large range robot. In collaboration with industrial partners the KfK has developed such Extended Multi joint Robot (EMIR) which is driven by hydraulic actuators. The position control of EMIR is a tough problem due to the extreme nonlinearities of the kinematics and hydraulic actuators as well as the remarkable elasticities of the mechanics and hydraulics. In the first part of this paper a realistic physically transparent model of the robot will be presented. In the second part different suitable control concepts based on the model will be discussed.
keywords	Hydraulic Large Range Robot; Automatic Control; Modelling OoNonlinearities and Elasticity; Model-Based Control Concepts
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 14:40

_id	cf40
authors	Leyh, W.
year	1995
title	Automatic assembly of a commercial cavity block system
source	Automation in Construction 4 (2) (1995) pp. 147-167
summary	In an earlier publication (Leyh, 1993) the "Experiences with the Construction of a Building Assembly Robot" have been dealt with. The application of that robot system for the automatic assembly of commercial cavity blocks is the subject of a subsequent report which consists of two parts: in the first, this paper, we primarily deal with the assembly methods, in the second we deal with their realization. What is characteristic of cavity blocks is the fact that they are at first assembled dry, without cementing material, and the masonry is later filled with mortar. As to their weight and dimension, the cavity blocks used by the company GISOTON are adjusted to the ergonomics of a mason. The entirely different characteristics and abilities of assembly robots are not taken into consideration. However, their dimensional tolerance is relatively small (0.5 mm). Furthermore as cavity bricks, they have conic and oval recesses. Both features are strongly favourable for automation. This paper will highlight specific problems during automized construction assembly with commercial standard assembly elements, and help to solve them.
keywords	Robotics; Assembly methods; Jointing technique; Reference system; Gripper construction
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/06/02 09:36

_id	2768
authors	Maciel, P.W.C. and Shirley, P.
year	1995
title	Visual navigation of large environments using textured clusters
source	Proceedings 1995 Symposium on Interactive 3D Graphics, pp. 95-102, June 1995
summary	A visual navigation system is described which uses texture mapped primitives to represent clusters of objects to maintain high and approximately constant frame rates. In cases where there are more unoccluded primitives inside the view- ing frustum than can be drawn in real-time on the workstation, this system ensures that each visible object, or a cluster that includes it, is drawn in each frame. The system supports the we of traditional "level-of-detail" representations for individual objects, and supports the automatic genera- tion of a certain type of level-of-detail for objects and clusters of objects. The concept of choosing a representation from among those associated with an object that accounts for the direction from which the object is viewed is also supported. The level-of-detail concept is extended to the whole model and the entire scene is stored as a hierarchy of levels-of-detail that is traversed top-down to iind a good representation for a given viewpoint. This system does not assume that visibility information can be extracted from the model and is thus especially suited for outdoor environments.
series	other
last changed	2003/04/23 15:50

_id	5af8
authors	Rosenfeld, Y.
year	1995
title	Automation of existing cranes: from concept to prototype
source	Automation in Construction 4 (2) (1995) pp. 125-138
summary	This paper describes the conversion of an existing full-scale 5-ton payload crane into a semi-automatic "Handling Robot". By its size, degrees of freedom, and mode of operation this crane resembles typical construction cranes, which can be enhanced in the same manner. The new control system allows operation of the crane in either a manual or a semi-automatic mode, and it can be taught to memorize up to 50 different benchmarks, i.e. particular points at the construction site, as well as safe routes among them. The major components of the system include: a programmable controller, three speed regulators, three encoders, several limit switches, a wireless remote control set, and a user-friendly MMI (Man-Machine-Interface). Most of the components can be installed externally in the vicinity of the crane's joints and inside the cabin, with minimal intervention in the original wiring. Following the physical retrofitting of the crane, a series of tests examined performance, accuracy, repeatability, and safety aspects. They demonstrated a 15-50% shortening of typical work cycles, high accuracy and repeatability, and a generally safer operation due to pre-tested paths and smoother movements with less sway and swing of the load.
keywords	Construction Automation; Construction Cranes; Robotics; Machine Control
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 14:35

_id	e092
authors	Streilein, André and Hirschberg, Urs
year	1995
title	Integration of Digital Photogrammetry and CAAD: Constraint-Based Modelling and Semi-Automatic Measurement
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 35-47
summary	The integration of state-of-the-art photogrammetric methods with the capabilities of CAAD has great potential for a variety of architectural applications. This paper describes the current status of an ongoing research project which aims to develop an easy to use tool for the photogrammetric generation of accurate, reliable and well structured 3D CAAD models of architectural objects. The system essentially consists of a standard CAAD package to which additional functionality was added and a Digital Photogrammetry Station (DIPS), providing semi-automatic computer measurement. The paper concentrates on two main issues in the design of the system: the data-integration and the CAAD-based 3D feature extraction. The data-integration is achieved using a knowledge-base. On top of an adequate data-transfer between the two systems this knowledge-base enables constraint-based modelling in CAAD and qualitatively controlled measurement in DIPS. In the section about Digital Photogrammetry we describe the 3D feature extraction procedure in detail and point out how the qualitative control can be achieved. A practical example is used to illustrate the performance of the system.
series	CAAD Futures
email
last changed	2003/06/10 12:12

_id	e72e
authors	Asaro, N., Corrao, R., Faconti, D., Fiandaca, O., Grifoni, P. and Silvani, A.
year	1995
title	Riesce: An Hypertextual Tool for Browsing Information Produced in the Building Sector by PFEd
doi	https://doi.org/10.52842/conf.ecaade.1995.401
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 401-408
summary	The structure of a set of documents allow for navigation inside single texts. Yet it is often also an obstacle to comparability between different parts and concepts. Even document formatting is only a partial answer to the problem, since it fails to develop the matter of relationships between enunciation and results. It was need to retrieve information about the scientific findings made by Research Units (Operating Units) during the first three year period of the "Progetto Finalizzato Edilizia" (PFEd) for assessment and transfer purposes which led us to design and develop a system to facilitate the retrieval of the relevant information. We chose the building sector for this application because of its relative lack of previous experience of this type, the variety and complexity of documentation available and, last but not least, the general underestimation of research topics and results vis-à-vis the development of the sector. By making the suggestion and information inherent in its findings more available, in terms of method and ambit, as well as more explicit, the research has already achieved a significant result. In view of the prototype character of the experiment, the information will probably be adopted to produce an hypertext on the final results.
series	eCAADe
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_48.htm
last changed	2022/06/07 07:54

_id	88f3
authors	Herman, H. and Singh, S.
year	1995
title	First results in autonomous retrieval of buried objects
source	Automation in Construction 4 (2) (1995) pp. 111-123
summary	We have developed an autonomous system for the retrieval of buried objects. It is designed to detect, locate and retrieve buried objects. The system is equipped with a surface and a subsurface sensor. The surface sensor is a laser rangefinder used to build the surface model. The subsurface sensor is a ground penetrating radar (GPR) used to detect and locate buried objects. We use an industrial robot equipped with an excavator bucket for automated excavation. Our system uses a "sense and dig cycle" procedure to retrieve buried objects. First, subsurface sensing is used to detect and locate the buried objects. If the object can be reached with one dig, the excavator retrieves it directly. Otherwise a layer of soil above the object is removed and another subsurface scan is made to get a more accurate estimate of the object location. This loop is repeated until the object is retrieved. The paper presents some recent results in sensing and excavation from experiments conducted on our testbed and the specific methods that we use to achieve those results. Such a system has numerous potential applications. They include hazardous waste removal, maintenance of subsurface structure (e.g. gas pipes), construction, and removal of unexploded buried ordnance.
keywords	GPR; Ground Penetrating Radar; Subsurface Sensing; Autonomous Excavation; Robot Planning
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 14:43

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