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	caadria2022_157
id	caadria2022_157
authors	Liu, Sijie, Wei, Ziru and Wang, Sining
year	2022
title	On-site Holographic Building Construction: A Case Study of Aurora
source	Jeroen van Ameijde, Nicole Gardner, Kyung Hoon Hyun, Dan Luo, Urvi Sheth (eds.), POST-CARBON - Proceedings of the 27th CAADRIA Conference, Sydney, 9-15 April 2022, pp. 405-414
doi	https://doi.org/10.52842/conf.caadria.2022.2.405
summary	Geometrically complex building components‚ reliance on high-touch implementation often results in tedious information reprocessing. Recent use of Mixed Reality (MR) in architectural practices, however, can reduce data translation and potentially increase design-to-build efficiency. This paper uses Aurora, a single-story residential building for 2021 China‚s Solar Decathlon Competition, as a demonstrator to evaluate the performance of on-site holographic building construction. This paper firstly reviews recent studies of MR in architectural design and practice. It then describes an MR-aided construction process of Aurora's non-standard building envelope and rooftop mounting structure, where in-situ holographic registration, human-machine cooperation, and as-built analysis are discussed. This paper concludes by stating that MR technologies provide unskilled implementers with a handy approach to materialise complex designs. The research was guided by the UN Sustainable Development Goals, especially aligning with the GOAL 9 which seeks innovations in industry and infrastructure.
keywords	Mixed Reality, Non-standard Architecture, Low-tech Construction, Solar Decathlon Competition, SDG 9
series	CAADRIA
email
last changed	2022/07/22 07:34

_id	ga0226
id	ga0226
authors	Liu, X., Frazer, Jh. and Tang, M.X.
year	2002
title	A generative design system based on evolutionary and mathematical functions
source	International Conference on Generative Art
summary	Previous work by Professor John Frazer on Evolutionary Architecture provides a basis for the development of a system evolving architectural envelopes in a generic and abstract manner. Recent research by the authors has focused on the implementation of a virtual environment for the automatic generation and exploration of complex forms and architectural envelopes based on solid modelling techniques and the integration of evolutionary algorithms, enhanced computational and mathematical models. Abstract data types are introduced for genotypes in a genetic algorithm order to develop complex models using generative and evolutionary computing techniques. Multi-objective optimisation techniques are employed for defining the fitness function in the evaluation process.
series	other
email
more	http://www.generativeart.com/
last changed	2003/08/07 17:25

_id	ecaade2022_42
id	ecaade2022_42
authors	Liu, Xuehan, Wang, Likai and Ji, Guohua
year	2022
title	Optimization Approaches in Performance-Based Architectural Design - A comparison study
source	Pak, B, Wurzer, G and Stouffs, R (eds.), Co-creating the Future: Inclusion in and through Design - Proceedings of the 40th Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2022) - Volume 1, Ghent, 13-16 September 2022, pp. 599–608
doi	https://doi.org/10.52842/conf.ecaade.2022.1.599
summary	Over the past decade, computational design optimization has been increasingly applied to the studies related to early-stage architectural design exploration and information extraction, in which various optimization approaches have been adopted such as single- objective optimization (SOO) and multi-objective optimization (MOO). Despite this, the impact of optimization approaches on information extraction has been relatively under- researched. In this regard, this paper presents a comparison study of different optimization approaches, with a special focus on search efficiency and information extraction. In the comparison study, we investigate the impact of different optimization approaches on information extraction and design cognition and finally, discuss the utility of these approaches to architectural design ideation and synthesis.
keywords	Computational Design, Design Optimization, Design Exploration, Performance-based Design, Early-stage Architectural Design
series	eCAADe
email
last changed	2024/04/22 07:10

_id	e8aa
authors	Liu, Y., Tsou, J. and Hou, J. (Eds.)
year	1997
title	CAADRIA ‘97 [Conference Proceedings]
source	Proceedings of the Second Conference on Computer Aided Architectural Design Research in Asia / ISBN 957-575-057-8 / Taiwan 17-19 April 1997, 498 p.
doi	https://doi.org/10.52842/conf.caadria.1997.x.o3m
series	CAADRIA
email
more	http://www.iaa.nctu.edu.tw/~caadria97/
last changed	2022/06/07 07:49

_id	5df9
authors	Liu, Y.-T., Chang, Y.-Y. and Wong, C.-H.
year	2001
title	Someone Somewhere Some Time in the Middle of Nowhere: Some Observations of Spatial Sense Formation in the Internet
source	Architectural Information Management [19th eCAADe Conference Proceedings / ISBN 0-9523687-8-1] Helsinki (Finland) 29-31 August 2001, pp. 37-41
doi	https://doi.org/10.52842/conf.ecaade.2001.037
summary	Following a previous study which investigated the verbal and visual elements of cyberspace, this study examines the relationship different academic training and the perceptions of the verbal and visual elements found in the previous study. The results of this study seems to indicate that the perception of the verbal elements is not relative to the subject’s academic training while the perception of the visual elements is.
keywords	Keywords. Theory Of Space, Virtual Reality, Virtual Space, Web-Based Design, Visual Perception
series	eCAADe
email
last changed	2022/06/07 07:59

_id	87e3
authors	Liu, Y.-T., Shih, S.-C., Yeh, Y.-C. and Lee, H.-L.
year	2001
title	Design Production and Appreciation with Computer and Internet - Evolving Phenomena of Design Review in CAD Studio and Internet-based Competition
source	Architectural Information Management [19th eCAADe Conference Proceedings / ISBN 0-9523687-8-1] Helsinki (Finland) 29-31 August 2001, pp. 382-387
doi	https://doi.org/10.52842/conf.ecaade.2001.382
summary	This study intends to investigate some evolving phenomena of the interaction between design production and appreciation in the environment of computer and Internet. The result of this study indicates that the interaction between design production and appreciation during the review processes could differ significantly. The design production and appreciation seem to be more linear in CAD studio whereas more cyclic in the Internet environment.
keywords	CAD Studio, Internet-Based Competition, Design Review
series	eCAADe
email
last changed	2022/06/07 07:59

_id	da35
authors	Liu, Y.T.
year	1994
title	Some Phenomena of seeing shapes in design
source	Design Studies, v 16, n 3, pp. 367-385
summary	This paper is a look at some of the pyschological results that suggest how shape emergence manifest itself in the human mind. The first interesting result goes back to top down expectation guiding recognition. Some experimental suggest that it is easier (quicker) to recognize shapes which we have some alternate mental familiarity. (I.E. verbal, structural descriptions). So if we can easily say a shape then we can easily discern it as an emergent shape. The paper then goes on to discuss the definition of emergent subshapes and gives various authors definitions of what makes up and emergent shape. One interesting classification is the difference between explicit and implicit emergent shapes made by Mitchell. This difference amounts to a fine line between imagination and emergence. The results of an experiment between experienced and in-experienced designers is discussed. The results suggest that experienced designers are able to find more emergent shape than non experienced designers. From these results and from the opinions of others, the author goes on to specify 3 phenomena related to emergent recognition. The first is as above that it is easier to see shapes with which we are familiar. Second from this, the harder shapes are found after the initial period. Third, from the first two, time is required to find more subshapes. The author then searches for an explanation of this phenomena. He suggests that the underlying cause is related to an experience person having a lower threshold of what it is to be a member of a shape. When seeing an L shape the experienced design is likely to consider it also a square, because his requirement for the set of features which must be present for some object to be a considered a square is a smaller set than the inexperienced. While the author suggests that this is a phenomena it is actually an hypothesis. An alternate hypothesis may be that top down inhibitions effect the bottom up performance of the inexperienced design more because of different representation.
series	journal paper
email
last changed	2003/04/23 15:14

_id	caadria2020_064
id	caadria2020_064
authors	Liu, Yige, Chai, Hua and Yuan*, Philip F.
year	2020
title	Knitted Composites Tower - Design Research for Knitted Fabric Reinforced Composites Based on Advanced Knitting Technology
source	D. Holzer, W. Nakapan, A. Globa, I. Koh (eds.), RE: Anthropocene, Design in the Age of Humans - Proceedings of the 25th CAADRIA Conference - Volume 1, Chulalongkorn University, Bangkok, Thailand, 5-6 August 2020, pp. 55-64
doi	https://doi.org/10.52842/conf.caadria.2020.1.055
summary	Faced with growing urbanization demands of developing countries and global shortages of construction materials, this research looks for an innovative light-weight high-performance material system for architectural applications. The knitted composites tower is a 7.2-meter, 260-kilogram and self-supported prototype that uses 2mm thick knitted fabric reinforced composites. The result is lightweight and strong. It demonstrates the design potentials of knitted fabric reinforced composites. This article takes knitted composites tower as an example to illustrate a design method for knitted fabric reinforced composites. The design method covers three aspects of structural form selection, structure arrangement, and microscopic configuration. At last, the complete fabrication and construction process will be discussed with a full-scale physical prototype.
keywords	Knitting; Composites; Architectural Design
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	caadria2023_129
id	caadria2023_129
authors	Liu, Yisi, Webb, Nick and Brown, Andre
year	2023
title	The Re-creation of a Demolished House Based on Collective Memory
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. 363–372
doi	https://doi.org/10.52842/conf.caadria.2023.1.363
summary	This paper investigates how the collective memory of an architectural setting can be captured, re-created, and re-experienced. The method uses a workflow to create a Virtual Environment (VE) from diverse sources in an interpretational and iterative process. A case study was implemented to test this workflow, focusing on the re-creation of a now demolished family home based on information from multiple generations of a family. The workflow's main output is a VE in which the family members can re-experience the house and give continuous feedback. The essence of this workflow is the constant negotiation between remembered space in memory and its digital interpretation in the VE. The output was assessed and refined according to the users' feedback, which is used to loop back to specific stages in the workflow. This process revealed undisclosed histories and enhanced our understanding of this demolished site and its wider context. Moreover, the workflow provides a model for studying conceptually recreated spaces based on subjective sources and provides a user-centred experience in the VE.
keywords	Demolished houses, Collective memory, Interpretation, Virtual environment, User-centred
series	CAADRIA
email
last changed	2023/06/15 23:14

_id	sigradi2023_189
id	sigradi2023_189
authors	Liu, Yiyun, Dai, Sida, Kleiss, Michael, Alani, Mostafa and Pebryani, Nyoman
year	2023
title	Manufacturing Methodology for Precast Concrete Tiles with Morphing Shapes
source	García Amen, F, Goni Fitipaldo, A L and Armagno Gentile, Á (eds.), Accelerated Landscapes - Proceedings of the XXVII International Conference of the Ibero-American Society of Digital Graphics (SIGraDi 2023), Punta del Este, Maldonado, Uruguay, 29 November - 1 December 2023, pp. 67–78
summary	This study presents a novel, sustainable method for producing diverse concrete tiles with a reusable mould, addressing the waste issue associated with traditional tile moulds. Our digital manufacturing system, composed of a Rhino Grasshopper-based design system and an electric actuator-based kinetic mechanism, simplifies the construction process and lowers costs. The effectiveness of this method is showcased through six case studies, demonstrating its adaptability in diverse morphing tile designs, including the reinterpretation of traditional Islamic pattern. This approach opens new possibilities for the cost-effective, sustainable, and versatile use of concrete tiles in architecture.
keywords	Additive Manufacturing, Concrete, Actuated Mould, Morph, Tessellation Tile
series	SIGraDi
email
last changed	2024/03/08 14:06

_id	caadria2024_33
id	caadria2024_33
authors	Liu, Yongkang and Wang, Yi
year	2024
title	Survey of Built Environment in the Era of UAV: From Aerial Photogrammetry to Point Cloud Classification
source	Nicole Gardner, Christiane M. Herr, Likai Wang, Hirano Toshiki, Sumbul Ahmad Khan (eds.), ACCELERATED DESIGN - Proceedings of the 29th CAADRIA Conference, Singapore, 20-26 April 2024, Volume 2, pp. 149–158
doi	https://doi.org/10.52842/conf.caadria.2024.2.149
summary	In order to further discover the potentials of UAV (Unmanned Aerial Vehicle) for built environment research, this article involves in drone aerial survey and its post-processing, with a special focus on point cloud classification. By operating UAV flying over villages at foot of Mount Tai, capturing images of the villages as first-hand materials, and conducting research with the help of 3D model reconstruction software, deep learning implements, GIS environment, the findings of research response the questions of the relationship between flight altitude, working efficiency, and 3D reconstruction quality, and how to utilize the deep learning tools for certain building classification. The solution to the second problem, also the most noteworthy contribution of this article, is achieved by training a customized point cloud classification model. This model can be used to identify point clouds of specific types of buildings, which is an advancement compared to the basic Automated Classification in ArcGIS Pro. The quality of point cloud recognition is also better than the latter. Potential application of this research could be reflected in the statistical work for certain types of buildings. In other words, this study plays an intermediary role between UAV-aided image gathering to further spatial statistical research.
keywords	UAV-aided Survey, Aerial Photogrammetry, Customized Point Cloud Classification, Deep Learning
series	CAADRIA
email
last changed	2024/11/17 22:05

_id	6097
authors	Liu, Yu Tung
year	1996
title	Connectionist CAAD for Restructuring Shapes in Terms of Emergent Subshapes
source	CAADRIA ‘96 [Proceedings of The First Conference on Computer Aided Architectural Design Research in Asia / ISBN 9627-75-703-9] Hong Kong (Hong Kong) 25-27 April 1996, pp. 173-190
doi	https://doi.org/10.52842/conf.caadria.1996.173
summary	Designers naturally restructure shapes in terms of emergent subshapes in the process of design. According to the result of a psychological experiment about how experienced and non-experienced designers see shapes, only experienced designers can encode implicit subshapes emerged from the primary shapes. Many symbolic approaches have been considered in addressing this focused problem. On the other hand, the issue is also encountered by connectionist networks, also called parallel distributed models or neural networks. Recognizing both explicit and implicit emergent subshapes has been explored using connectionist networks associated with appropriate mechanisms of visual attention, namely recurrent attention and searchlight attention in combination. The distinction between symbolic and connectionist computations of shapes is discussed.
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	4a5f
authors	Liu, Yu-Tung
year	1993
title	Recognizing Emergent Subshapes in Design Problem Solving: A Connectionist Investigation
source	Education and Practice: The Critical Interface [ACADIA Conference Proceedings / ISBN 1-880250-02-0] Texas (Texas / USA) 1993, pp. 131-139
doi	https://doi.org/10.52842/conf.acadia.1993.131
summary	Human problem-solving behavior has been modelled as a search through the space as defined as problem states, within which earlier states move to subsequent ones by applying rules in the human mind until the goal state is found. This cognitive model of problem-solving has been broadly accepted and has become dominant in both cognitive psychology and artificial intelligence (AI). In the field of computeraided architectural design (CAAD), search models are also widely used for solving design problems, although various foci of design knowledge are differently represented by shape grammars, graphs, and knowledge-based systems using predicate logic for different purports. In design search, design evolves from one state to another by exhaustively or heuristically applying proper rules. Each rule application involves, first, pattern-matching the antecedent of a rule to the current state and, second, transforming the matched portion of that state into the consequence of the rule. However pattern-matching techniques of current CAAD systems are still limited. In current CAAD systems, only those two squares can be dealt with by patternmatching for further development. However, a human designer can effortlessly recognize not only those two but other emergent subshapes, for example a smaller square in the middle where the two squares overlap and two L-shapes in the corners. Therefore a human designer can thoroughly deliberate all these alternatives before making a decision. In other words, human designer is capable of restructuring shapes in terms of emergent subshapes in any step of designing.
series	ACADIA
email
last changed	2022/06/07 07:59

_id	e17e
authors	Liu, Yu-Tung
year	1998
title	A Dual Generate-and-Test Model for Design Creativity
source	CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 395-404
doi	https://doi.org/10.52842/conf.caadria.1998.395
summary	This paper proposes a broader framework for understanding creativity by distinguishing different levels of creativity, namely personal and social/cultural creativity, and their interaction. Within this framework, the possible role that the computer can play could be further explored by analyzing the procedure of rule formation and the phenomena of seeing emergent subshapes.
keywords	Model of Design Creativity, Problem-Solving, Generate-and-Test Paradigm, Search Model, Social/Cultural Paradigm
series	CAADRIA
email
more	http://www.caadria.org
last changed	2022/06/07 07:59

_id	e546
authors	Liu, Yu-Tung
year	2000
title	The Evolving Concept of Space: From Hsinchu Museum of Arts to the Digital City Art Center
source	ACADIA Quarterly, vol. 19, no. 4, pp. 9-11
doi	https://doi.org/10.52842/conf.acadia.2000.009.2
summary	From a functional point of view, a museum of arts is a space used for collecting works of art. This is, however, a spatial concept held prior to the 20th century: the center of focus in spatial design is the collections (focusing on “objects” as opposed to “users”). In the 20th century, the museum has evolved into a space for the interactivity between the viewers and the objects, with the concept of design shifting to that of placing equal emphasis on both the user and the object?at times the role of the user is even given greater emphasis in the design process without a conscious intent on the part of the designer. The coming century is one that we believe will be confronted with incredible waves caused by the impact of computers, the ultimate machines of digitization. At this junction, we often say that we are going to have new ways of thinking, new cities and new concepts of space. However, what should these new things be?
series	ACADIA
email
last changed	2022/06/07 07:59

_id	cf2003_k_003
id	cf2003_k_003
authors	LIU, Yu-Tung
year	2003
title	Digital Architecture: Theory, Media and Design
source	Digital Design - Research and Practice [Proceedings of the 10th International Conference on Computer Aided Architectural Design Futures / ISBN 1-4020-1210-1] Tainan (Taiwan) 13–15 October 2003, pp. 9-18
summary	Computers, the new digital media, liberate the duality of concepts of space in human civilization. The construction and simulation powers of digital media trigger all kinds of unlimited imagination. The new space of this kind may be called digital space or virtual space. This new space is between mental and physical spaces because it provides designers with not only unlimited imaginality of mental space but also live-inside perception of physical space. A new concept of space of mankind is thus generated.
keywords	cognition, computing, digital design media
series	CAAD Futures
email
last changed	2003/09/22 12:21

_id	8db9
authors	Liu, Yu-Tung
year	1993
title	A Connectionist Approach to Shape Recognition and Transformation
source	CAAD Futures ‘93 [Conference Proceedings / ISBN 0-444-89922-7] (Pittsburgh / USA), 1993, pp. 19-36
summary	In human design processes, many drawings of shapes remain incomplete or are executed inaccurately. Cognitively, a designer is able to discern these anomalous shapes, whereas current CAAD systems fail to recognize them properly so that CAAD systems are unable to match left-hand-side conditions of shape rules. More unfortunately, as a result, current CAAD systems fail to retrieve right-hand-side actions. In this paper, multi-layered neural networks are constructed to solve the recognition and transformation of ill-processed shapes in the light of recent advances of connectionism in cognitive psychology and artificial intelligence.
keywords	Shape Recognition, Shape Transformation, Connectionist Models, PDP Models, Content-Addressable Memory, Neural Networks
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	4d82
authors	Liu, Yu-Tung
year	1995
title	Problem Decomposition on Restructuring Shapes in Terms of Emergent Subshapes
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 439-451
summary	Previous connectionist studies on recognizing both explicit and implicit emergent subshapes have found that adequately organized connectionist networks are explored the problem to some degree, but these explorations are still limited. One of the major limitations is that the connectionist procedure work adequately only with closed figures, not with line drawings. This paper proposes a method which generalizes the combined procedure of connectionist networks and visual attentions in order to recognize line drawings or a primary shape consisting of single lines. Depending upon the computational flexibility, the mechanism of searchlight attention provides the connectionist networks with the potential to address practical problems of shapes including different scales, different proportions and even simply line drawings.
keywords	Connectionist Networks, Emergent Subshapes, Problem Decomposition, Searchlight Attention
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	a64e
authors	Liu, Yu-Tung
year	2001
title	Spatial Representation of Design Thinking in Virtual Space
source	J. S. Gero, B. Tversky and T. Purcell (eds), 2001, Visual and Spatial Reasoning in Design, II - Key Centre of Design Computing and Cognition, University of Sydney, Australia
summary	“Space” has long been an important concept in architecture;and architectural spaces and forms have been continuously evolved dueto the appearance of new concepts of space. Since the invention ofInternet, new spaces have been created through the computer. Tounderstand how human beings in the digital age experience these newvirtual spaces, and to discover the implications of the possible newconcepts of space into the physical architectural world, this paperdiscusses the nature of virtual spaces by examining the verbal and visualelements involved in the creation of a sense of virtual spaces. All theverbal and visual elements of virtual spaces discovered through ourexperiments and interviews are presented. It is found that the three coreelements of both verbally and visually constructed virtual spaces are:movements, interactions, and acoustic effects. In addition, a comparisonbetween verbally and visually constructed spaces, and between physicaland virtual spaces are explored. Finally, further studies related to therole of digital media in the construction of a sense of space aresuggested at the end of this paper.
series	other
email
more	http://www.arch.usyd.edu.au/kcdc/conferences/vr01/
last changed	2003/05/02 11:15

_id	ijac20031109
id	ijac20031109
authors	Liu, Yu-Tung; Shen-Kai, Tang
year	2003
title	Space, Place and Digital Media:Towards a Better Simulation of a City that has now Disappeared
source	International Journal of Architectural Computing vol. 1 - no. 1
summary	Digital media enable researchers and designers to derive better informed processes in solving problems of historical architectural restoration and virtual archaeology. However, recently insufficiencies have been found in the main technologies often applied in such techniques, such as 3D modeling, high-quality rendering and animation. Given these problems, this paper attempts to explore a digital reconstruction procedure for historical architecture and cities using 3D scanning, Virtual Reality cave technology and motion capture technology. This case study is based on a collaborative project in conjunction with the National Palace Museum, Taiwan, and the China Times, Taiwan.The five steps involved in this project include data collection and analysis, three-dimensional digital inferences, digital reconstruction of static and moving models, scenario dynamics (by integrating the two kinds of models), and visual-spatial immersion using a VR-cave representation. Finally, a preliminary digital reconstruction procedure is presented.
series	journal
email
more	http://www.multi-science.co.uk/ijac.htm
last changed	2007/03/04 07:08

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