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	eaea2003_08-ohno
id	eaea2003_08-ohno
authors	Ohno, R., Soeda, M. and Nakashima, K.
year	2004
title	The Effectiveness of Design Guideline Regulations for Improving Streetscapes
source	Spatial Simulation and Evaluation - New Tools in Architectural and Urban Design [Proceedings of the 6th European Architectural Endoscopy Association Conference / ISBN 80-227-2088-7], pp. 21-27
summary	Municipal governments or developers make design guidelines to create harmonious streetscapes in new towns. The regulations, however, are often based on arbitrary decisions without any empirical research. The present study employed a visual simulation system to test the effects of such physical features of the buildings as color, height, flatness of the building façade and its recess from the street on pedestrians’ impressions of the place. Thirty subjects were asked to rate their impressions of “order”, “simple”, and to evaluate the atmosphere after experiencing the simulated scenes. The results revealed some relations between the physical features and the pedestrians’ responses.
series	EAEA
more	http://info.tuwien.ac.at/eaea
last changed	2005/09/09 10:43

_id	eaea2005_151
id	eaea2005_151
authors	Ohno, Ruyzo
year	2006
title	Seat preference in public squares and distribution of the surrounding people: An examination of the validity of using visual simulation
source	Motion, E-Motion and Urban Space [Proceedings of the 7th European Architectural Endoscopy Association Conference / ISBN-10: 3-00-019070-8 - ISBN-13: 978-3-00-019070-4], pp. 151-163
summary	Public squares are shared by people who use them for various purposes. When people choose seats in a square, they unconsciously evaluate not only the physical characteristics of the space but also the distribution of others already present (Hall, 1966; Sommer, 1969; Whyte, 1988). Knowing the hidden rules of this behaviour will be important in designing squares that remain comfortable even in crowded situations. Most past studies of seat choice preference have reported on statistical tendencies derived from observations of subject behavior in actually existing sites (i.e., Abe, 1997; Imai, 1999; Kawamoto, 2003). However, they provide no clear theoretical model for explaining the basic mechanisms regulating such behaviour. The present study conducts a series of experiments in both real and virtual settings in order to extract quantitative relationships between subjects’ seat preferences and the presence of nearby strangers and to clarify what factors influence their seat choices.
series	EAEA
type	normal paper
email
more	http://info.tuwien.ac.at/eaea
last changed	2008/04/29 20:46

_id	ebbf
authors	Ohno, Ryozo
year	1995
title	Street-scape and Way-finding Performance
source	The Future of Endoscopy [Proceedings of the 2nd European Architectural Endoscopy Association Conference / ISBN 3-85437-114-4]
summary	In this study, it was hypothesized that people’s performance of way-finding depends on the characteristics of street-scapes, i.e., the more visual information exists the easier people find their own ways. This relationship was investigated by an experiment using an environmental simulator and analysis of the subject’s behavioral data recorded by the simulation system. Three scale models (1/150) of identical maze patterns (300m x 300m) which have different street-scapes were created and set in the simulator, in which an endoscope connected to CCD color TV camera controlled by a system operated by a personal computer. Three types of streets are: (1) having no characteristics with monotonous surface, (2) having characteristics on each corner with different buildings, (3) having characteristics along the streets with trees, columns or fences. The simulator allows a subject to move through the scale models and looking around, using a “joy-stick“ for viewing the scene as projected on 100-inch CCTV screen. The control system of the simulator records all signals generated by the “joy-stick“ every 0.01 second, and thus exact position within the model space and the viewing direction at given moment can be stored in the computer memory, which can be used to analyze the subject’s behavior. The task of a subject was to find the way which was previously shown by the screen. Three male and three female subjects for each of three street types, for a total of eighteen subjects participated in the experiment. An analysis of the trace of movements and viewing directions generally supported the hypothesis that the street with visual characteristics were easier to memorize the route although there was a large difference in performance among subjects. It was also noted that there were three different strategies of way-finding according to the subject: one group of subjects seemed to rely on well structured knowledge of the route, i.e., the cognitive map, and the other group seemed to rely on incoming visual information of the changing scenes, and the last group seemed to find the way using both the cognitive map and visual information depending on the situations.
keywords	Architectural Endoscopy, Real Environments
series	EAEA
more	http://info.tuwien.ac.at/eaea/
last changed	2005/09/09 10:43

_id	29f3
authors	Ohno, Ryuzo and Aoki, Hirofumi
year	1999
title	Development of an Interactive Simulation System for Environment-Behavior Study
source	Simulation of Architectural Space - Color and Light, Methods and Effects [Proceedings of the 4rd European Architectural Endoscopy Association Conference / ISBN 3-86005-267-5] Dresden (Germany), 29 September - 1 October 1999, pp. 36-49
summary	An important recent development in the simulation techniques was the changes in the mode of presentation: from passive mode to active one. It is now possible to present an image according to the observer’s voluntary movement of body and head by means of a head-mounted display. Such interactive simulation system, which allows people to observe what they like to see, is suitable to study environmental perception, because active attention is essential to manipulate enormous information in the environment. The present paper reports two case studies in which an interactive simulation system was developed to test psychological impact of interior and exterior spaces: the case study 1 intended to clarify the effect of the disposition of transparent and opaque surfaces of a room on the occupants’ „sense of enclosure“, the case study 2 intended to make clear some physical features along a street which are influential for changing atmosphere. In addition to the empirical research, an attempt to develop a new simulation system which uses both analogue and digital images is briefly reported, and a preliminary experiment was conducted to test the performance of the simulation system in which such movable elements as pedestrians and cars generated by real-time CG were overlaid on the video image of a scale model street.
series	EAEA
email
more	http://info.tuwien.ac.at/eaea
last changed	2005/09/09 10:43

_id	c308
authors	Ohno, Ryuzo and Hata, Tomohiro
year	1993
title	The Effect of Spatial Structure on Visual Search Behavior
source	Endoscopy as a Tool in Architecture [Proceedings of the 1st European Architectural Endoscopy Association Conference / ISBN 951-722-069-3] Tampere (Finland), 25-28 August 1993, pp. 89-98
summary	People’s voluntary movement through an environment is essential for their comprehension of three dimensional space. It may be hypothesized that they move and look around in order to pick up wanted information at the time. This study investigated the following more specific hypotheses by an experiment using a user-controlled space-sequence simulator and the analysis of the subjects’ behavioral data recorded by the simulation system: (1) The strategy of visual search behavior (body movement and viewing direction) is influenced by spatial structure (form and organization). (2) The strategy can be explained by the amount of visual information in the environment, i.e., people move and look in a certain direction in order to maximize effective information at a given moment and position. - If these hypotheses are supported, we can predict people’s behavior in an unfamiliar place on the basis of the spatial structure.
keywords	Architectural Endoscopy
series	EAEA
email
more	http://info.tuwien.ac.at/eaea/
last changed	2005/09/09 10:43

_id	ohno02_paper_eaea2007
id	ohno02_paper_eaea2007
authors	Ohno, Ryuzo; Jaeho Ryu
year	2008
title	Development of a Portable Virtual-Reality System for Disaster Education
source	Proceedings of the 8th European Architectural Endoscopy Association Conference
summary	Given that the probability of a catastrophic earthquake occurring is quite high in Japan compared to other countries; major cities like Tokyo operate many disaster-education facilities for informing citizens about earthquake preparedness. Since an earthquake occurs suddenly with almost no time to react, daily preparation plays a greater role in reducing damage than for other types of disasters. In fact, statistics from the Kobe earthquake in 1995 show the largest cause of injury to have been falling furniture, something that could have been prevented with proper precautionary measures.
keywords	virtual reality, disaster, earthquake, education
series	EAEA
email
more	http://info.tuwien.ac.at/eaea
last changed	2008/04/29 20:46

_id	ecaade2013_194
id	ecaade2013_194
authors	Ohshima, Taisuke; Igarashi, Takeo; Mitani, Jun and Tanaka, Hiroya
year	2013
title	WoodWeaver
doi	https://doi.org/10.52842/conf.ecaade.2013.1.693
source	Stouffs, Rudi and Sariyildiz, Sevil (eds.), Computation and Performance – Proceedings of the 31st eCAADe Conference – Volume 1, Faculty of Architecture, Delft University of Technology, Delft, The Netherlands, 18-20 September 2013, pp. 693-702
summary	In this study, we propose a novel computational system called WoodWeaver for fabricating curved surfaces from conventional materials without using moulds. We use a cutting-based material bending method called Dukta. Our system enables a user to design a single free-form curved surface and to fabricate it based on the bending deformation characteristics of the material. The system also indicates an invalid shape; that is, one that will break upon bending deformation. The user can then design a valid shape with this information. We also develop an optimal Dukta pattern that is the smallest-sized gap pattern necessary to represent a user-designed shape. Given a valid shape, the system generates the optimal pattern and a machine cuts four modules with this pattern. Finally, the user assembles these modules to obtain the desired shape.
wos	WOS:000340635300072
keywords	Digital fabrication; personal fabrication; computational design; mould bending; interactive modelling.
series	eCAADe
email
last changed	2022/06/07 08:00

_id	250a
authors	Ojeda, Oscar R. and Guerra, Lucas H.
year	1996
title	Hyper-Realistic, Computer Generated Architectural Renderings
source	New York, NY: McGraw Hill
summary	The Graphic Idea Resource series presents design in an affordable format. Each book in the series presents inspiring, contemporary, graphic design projects and focuses on a single area of design technique. With examples of finished work ranging from brochures to packaging to self-promotion, this series is a valuable resource for designers working in any specialty.
series	other
last changed	2003/04/23 15:14

_id	caadria2011_005
id	caadria2011_005
authors	Okabe, Aya and Tsukasa Takenaka
year	2011
title	Computational landscape design with the seed scattering system: A case study in the Sony forest project
source	Proceedings of the 16th International Conference on Computer Aided Architectural Design Research in Asia / The University of Newcastle, Australia 27-29 April 2011, pp. 49-58
summary	This paper proposes a computational landscape design method, called the seeds scattering system (SS system), which enables us to manage various environmental parameters in design processes, to create the ‘natural forest’ in urban environments. First, this paper discusses the drawbacks of the conventional methods for landscape design. Second, the paper outlines the components of the SS system together with the design process of the SONY forest project in Tokyo, and shows its advantages, including broad applicability to conceptual design, and capability of environmental simulations and spatial optimizations. Last, the paper summarizes the effectiveness of the SS system. By managing fundamental rules behind geometries in forest growth processes, the SS system showed us capability for constructing interactive relationships between design and their surrounding environments to produce design inherent in its site.
keywords	Computational landscape design, parameter, tool customization, optimization, sensor network system
series	CAADRIA
email
last changed	2012/05/30 21:29

_id	ijac20075210
id	ijac20075210
authors	Okamura, Tomoaki; Fukami, Naoko; Robert, Charles; Andres, Frederic
year	2007
title	Digital Resource Semantic Management of Islamic Buildings Case Study on Isfahan Islamic Architecture Digital Collection
source	International Journal of Architectural Computing vol. 5 - no. 2, pp. 356-373
summary	This article describes an innovative way to facilitate and to provide a collaborative semantic management of digital resources of Islamic historical buildings. The approach combines a topic maps-based semantic support to the 5W1H model (Where, Who, When, What, Who and How) with objective of enabling comprehensive semantics of digital contents for research and education purposes. The topic maps-based semantic support enables to reduce the problems of semantic gaps among different communities (cultural, linguistic ambiguities among various types of multi-disciplinary experts). Furthermore, a multi-faceted resource category management, applied to metadata sets and related semantic features, allows metadata optimization of the description of the cultural resources. This innovative approach has been used to build the Isfahan Islamic Architecture Database (IIAD) Collection as a case study. The research demonstrates that a topic maps-based semantic model applied to collaborative metadata management paradigms can be easily exploited as a tool to enhance traditional architectural and cross-disciplinary studies.
series	journal
last changed	2007/08/29 16:23

_id	ascaad2016_020
id	ascaad2016_020
authors	Okawa, Haruna
year	2016
title	Computer Aided Analysis to Understand the Behavior of a Modular Chained Block - Towards an intentional control of a transformable architecture
source	Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 179-184
summary	This paper reports on the outcome of several tests that are run to examine the behavior of virtual and physical models of a chained block. Correlations between parameters of the component and the global geometry are studied using parametric modeling and physical model. Studies are limited to proportional and non-proportional relations according to the direction of the force. Further experiments are expected in the future to explore other forces. These computer-aided analyses offer a deeper understanding of the behavior of the system towards an intentional control of the global geometry.
series	ASCAAD
email
last changed	2017/05/25 13:31

_id	ascaad2007_000
id	ascaad2007_000
authors	Okeil, Ahmad; Al-Attili, Aghlab; Mallasi, Zaki (eds.)
year	2007
title	ASCAAD 2007: Embodying Virtual Architecture
source	The Third International Conference of the Arab Society for Computer Aided Architectural Design (ASCAAD 2007), 28-30 November 2007, Alexandria, Egypt.
series	ASCAAD
last changed	2022/05/04 11:01

_id	caadria2023_300
id	caadria2023_300
authors	Okhoya, Victor and Bernal, Marcelo
year	2023
title	Variability in Machine Learning for Multi-Criteria Performance Analysis
doi	https://doi.org/10.52842/conf.caadria.2023.1.149
source	Immanuel Koh, Dagmar Reinhardt, Mohammed Makki, Mona Khakhar, Nic Bao (eds.), HUMAN-CENTRIC - Proceedings of the 28th CAADRIA Conference, Ahmedabad, 18-24 March 2023, pp. 149–158
summary	Parametric analysis is emerging as an important approach to building performance evaluation in architectural practice. Since architectural performance has many competing metrics multi-criteria analysis is required to deal effectively with the complexity. However, multi-criteria parametric analysis involves large design spaces that are expensive to compute. Machine learning is emerging as an important design space reduction method for multi-criteria analysis. However, there are many types of machine learning algorithms and architects can benefit from understanding which algorithms perform well on which tasks. Using a mid-rise commercial residential tower project this paper investigates three common machine learning algorithms for performance against three common performance metrics. The algorithms are multi-layer perceptrons, support vector machines, and random forests, while the metrics are site energy, illuminance, and a value function that combines them both. In addition, we seek to understand what factors are most impactful in improving algorithm performance. We investigate four impact factors namely sample size, sensitivity analysis, feature selection, and hyperparameters. We find that multi-layer perceptrons perform best for all three performance metrics. We also find that hyperparameter tuning is the most impactful factor affecting multi-layer perceptron performance.
keywords	parametric analysis, machine learning, design space
series	CAADRIA
email
last changed	2023/06/15 23:14

_id	ijac202220309
id	ijac202220309
authors	Okhoya, Victor W; Marcelo Bernal; Athanassios Economou; Nirvik Saha; Robert Vaivodiss; Tzu-Chieh K Hong; John Haymaker
year	2022
title	Generative workplace and space planning in architectural practice
source	International Journal of Architectural Computing 2022, Vol. 20 - no. 3, pp. 645–672
summary	Generative design is emerging as an important approach for design exploration and design analysis in architectural practice. At the interior design scale, although many approaches exist, they do not meet many requirements for implementing generative design in practice. These requirements include the need for enduser accessible tools and skills, rapid execution, the use of standard inputs and outputs, and being scalable and reusable. In this paper, we describe a hybrid process that uses both space allocation and shape grammar algorithms to solve workplace and space planning interior design problems. Space allocation algorithms partition spaces according to program requirements while shape grammar automates the placement of inventory and the production of high-resolution drawings. We evaluate using three real world example projects how this hybrid approach meets the identified requirements of generative space planning in architectural practice
keywords	Generative design, shape grammar, space allocation, space planning
series	journal
last changed	2024/04/17 14:30

_id	6d7a
authors	Oksala, T.
year	1986
title	About the Mathematics of Knowledge-Based Design
doi	https://doi.org/10.52842/conf.ecaade.1986.244
source	Teaching and Research Experience with CAAD [4th eCAADe Conference Proceedings] Rome (Italy) 11-13 September 1986, pp. 244-252
summary	The aim of this paper is to enlighten the role of mathematics in architectural planning with the view of CAD-teaching. First attention is focussed on the general development in planning methodology and technology. Planning mathematics provides for the basic tools to support mastering this development. Finally the common possibilities of exact methods and CAD-technology are characterized.
series	eCAADe
last changed	2022/06/07 08:00

_id	e324
authors	Oksala, Tarkko
year	1989
title	Typological Knowledge in Computer-Aided Housing Design -- Chapter 6
source	Helsinki, Finland: the Finish Academy of Technology, 1989. No. 92: pp. 49-60 : ill. includes bibliography
summary	This paper considers logical aspects in the knowledge and rule based approach to housing planning and design. The generation problem in housing design is formulated and some experimental work in the field is discussed. Logical methods in knowledge-based generation are introduced as a frame for various production situation. Formation of typical compositions is discussed as a basis for more advanced design. Generation of typological classes and mastering of individual solutions by means of sets of predicates are used to form knowledge-bases for elementary housing solutions. The possibilities of sentenial calculi are characterized in order to allow reconstruction of tradition-guided expert know how. Finally some desirable characteristics of computer aided housing design systems are illustrated
keywords	housing, knowledge base, design, shape grammars, synthesis, floor plans, layout
series	CADline
last changed	1999/02/12 15:09

_id	ecaade2012_294
id	ecaade2012_294
authors	Okuda, Shinya ; Yang, Xiaoming ; Wittkopf, Stephen K
year	2012
title	Equalizing Daylight Distribution: Digital simulation and fabrication of optimized inner reflectors and bottom extractors for a light-duct
doi	https://doi.org/10.52842/conf.ecaade.2012.1.607
source	Achten, Henri; Pavlicek, Jiri; Hulin, Jaroslav; Matejovska, Dana (eds.), Digital Physicality - Proceedings of the 30th eCAADe Conference - Volume 1 / ISBN 978-9-4912070-2-0, Czech Technical University in Prague, Faculty of Architecture (Czech Republic) 12-14 September 2012, pp. 607-612.
summary	The present paper explores the implementation of a light-duct in order to equalise daylight distribution in an office space. While the illuminance level near windows in a building tends to be higher than that necessary for the working environment, artificial lighting is often used to ensure that the workspace further away from the windows has the required level of illuminance. Equalising daylight distribution from the periphery to the inner part would thus provide signifi cant advantages for energy-efficient lighting as well as the fl exible and efficient use of offi ce space. In order to achieve this goal, anti-glare devices in the perimeter zone such as louvers and daylight distribution devices such as light-ducts are required. In this paper, we focus on light-ducts in the first instance, with an emphasis on their two key components for controlling the direction of daylight, namely inner reflectors and bottom extractors.
wos	WOS:000330322400063
keywords	Day lighting; Digital Fabrication; Performance; Parametric; Algorithm
series	eCAADe
email
last changed	2022/06/07 08:00

_id	ecaade2013_082
id	ecaade2013_082
authors	Okuda, Shinya and Bhagra, Saurabh
year	2013
title	Cloud Arch
doi	https://doi.org/10.52842/conf.ecaade.2013.1.625
source	Stouffs, Rudi and Sariyildiz, Sevil (eds.), Computation and Performance – Proceedings of the 31st eCAADe Conference – Volume 1, Faculty of Architecture, Delft University of Technology, Delft, The Netherlands, 18-20 September 2013, pp. 625-632
summary	Expanded Polystyrene foam (EPS) is a chemically inert and 100% recyclable material that is lightweight and has a good compression strength per weight ratio; however, its current construction use is mostly limited to insulation or landfill. The key concept of this paper is to develop an EPS composite to create an ultra-lightweight long-span sustainable roofing structure by integrating the minimum necessary structural tension layer with a certified fire protection system. The authors present this concept in the following four steps, 1) EPS composite structural specimen test, 2) structural optimisation of the reversed displacement model, 3) discretisation with developable surfaces and 4) CNC hotwire rapid prototyping and assembly in scaled prototypes. The Cloud Arch is an economical, material-efficient, thermally insulated, quickly assembled ultra-lightweight construction that eliminates the need for formworks for long-span structures. It can be applied to many types of column-free spaces, such as in factories, gymnasiums, markets and cafeterias.
wos	WOS:000340635300065
keywords	Lightweight; prototyping; composite; digital fabrication; performance.
series	eCAADe
email
last changed	2022/06/07 08:00

_id	cf2009_poster_45
id	cf2009_poster_45
authors	Okuda, Shinya
year	2009
title	Bio-shell (Biodegradable vacuum-formed modularized shelter)
source	T. Tidafi and T. Dorta (eds) Joining Languages Cultures and Visions: CAADFutures 2009 CD-Rom
summary	This poster demonstrates how digitally fabricated vacuum-formed components can provide a new type of lightweight construction applicable to architecture. Surface-active systems such as a thin-shell concrete domes are some of the most material-efficient structures. Despite their efficiency few have been constructed recently due to necessary extensive labor cost. However, the growing concern for a worldwide shortage of natural resources and rising material costs, suggests that we reconsider the use of efficient structures, such as surface-active systems. Vacuum formed plastics mainly used in industrial design have strong merit based on their fast and low-cost mass production. Together with the recent emergence of digital fabrication technologies, the vacuum forming process is becoming an attractive fabrication technique for new and innovative lightweight structures.
keywords	Digital Fabrication, Biodegradable, lightweight structure
series	CAAD Futures
type	poster
email
last changed	2009/08/21 07:41

_id	ef67
authors	Olfe, D.B.
year	1995
title	Computer Graphics for Design. From Algorithms to AutoCAD.
source	New Jersey: Prentice-Hall
summary	Combines the fundamental principles and algroithms involved in graphics with specific applications and examples. Through this discussion, readers will understand more fully how CAD software programs function, and help diagnose and solve problems associated with modeling design on CAD systems.
series	other
last changed	2003/04/23 15:14

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