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	ijac202018304
id	ijac202018304
authors	Aagaard, Anders Kruse and Niels Martin Larsen
year	2020
title	Developing a fabrication workflow for irregular sawlogs
source	International Journal of Architectural Computing vol. 18 - no. 3, 270-283
summary	In this article, we suggest using contemporary manufacturing technologies to integrate material properties with architectural design tools, revealing new possibilities for the use of wood in architecture. Through an investigative approach, material capacities and fabrication methods are explored and combined towards establishing new workflows and architectural expressions, where material, fabrication and result are closely interlinked. The experimentation revolves around discarded, crooked oak logs, doomed to be used as firewood due to their irregularity. This project treats their diverging shapes differently by offering unique processing to each log informed by its particularities. We suggest here a way to use the natural forms and properties of sawlogs to generate new structures and spatial conditions. In this article, we discuss the scope of this approach and provide an example of a workflow for handling the discrete shapes of natural sawlogs in a system that involve the collection of material, scanning/digitisation, handling of a stockpile, computer analysis, design and robotic manufacturing. The creation of this specific method comes from a combination of investigation of wood as a material, review of existing research in the field, studies of the production lines in the current wood industry and experimentation through our in-house laboratory facilities. As such, the workflow features several solutions for handling the complex and different shapes and data of natural wood logs in a highly digitised machining and fabrication environment. This up-cycling of discarded wood supply establishes a non-standard workflow that utilises non-standard material stock and leads to a critical articulation of today’s linear material economy. The project becomes part of an ambition to reach sustainable development goals and technological innovation in global and resource-intensive architecture and building industry.
keywords	Natural wood, robotic fabrication, computation, fabrication, research by design
series	journal
email
last changed	2020/11/02 13:34

_id	43a9
authors	Goldman, Glenn and Zdepski, Stephen
year	1987
title	Form, Color & Movement
source	Integrating Computers into the Architectural Curriculum [ACADIA Conference Proceedings] Raleigh (North Carolina / USA) 1987, pp. 39-50
doi	https://doi.org/10.52842/conf.acadia.1987.039
summary	Computer generated three dimensional architectural modeling is a fundamental transformation of the traditional architectural design process. Viewing a three dimensional computer model from many vantage points and through animation sequences, presents buildings and their surrounding environments as a sequence of spaces and events, rather than as static objects or graphic abstractions. Three dimensional modeling at the earliest stages of design tends to increase the spatial and formal properties of early building design studies, and diminishes the dominance of plan as the form giver. The following paper is based upon the work of second, third and fifth year architectural students who have engaged in architectural design through the use of microcomputer graphics. In each case they entered the architectural studio with virtually no computer experience. Although the assigned architectural projects were identical to those of other "conventional" architectural studios, their design work was accomplished, almost solely, using four different types of graphic software: Computer-Aided Drafting, 3-Dimensional Modeling, Painting and Animation programs. Information presented is based upon student surveys, semester logs, interviews, impressions of external design critics, and the comparison of computer based and conventional studio final presentations.
series	ACADIA
email
last changed	2022/06/07 07:51

_id	236c
id	236c
authors	Hamuy Pinto, Eduardo; Galaz Lorca, Mirtha
year	2008
title	Evaluación de Participación e Interacción en LMS MOODLE [Assessment of Participation and Interaction in LMS MOODLE]
source	SIGraDi 2008 - [Proceedings of the 12th Iberoamerican Congress of Digital Graphics] La Habana - Cuba 1-5 December 2008, pp. 164-167.
summary	Learning Management Systems (LMS) embody spaces that combine Virtual Classrooms, learning communities, repositories of educational resources and communication devices. The use by faculty members and students, in a campus containing the schools of Architecture, Design and Geography, of Open Source LMS MOODLE, during the years 2005-2006, was assessed. An analysis of the Digital Vestiges, the metadata in the logs database, distinguished between the levels of informative and communicational interaction. The results draw attention to a trend, similar to previous measurements in Latin America, of more use of ICT educational resources for informational purposes than communicational interactions between teachers and students.
keywords	LMS, MOODLE, Meaningful Interactions
series	SIGRADI
type	normal paper
email
last changed	2016/03/10 09:53

_id	32b4
id	32b4
authors	Heylighen, Ann; Casaer, Mathias; Neuckermans, Herman
year	2006
title	UNAWARE: SUPPORTING TACIT DESIGN KNOWLEDGE EXCHANGE
source	International Journal of Web-Based Communities, Volume 2, Number 1, Jan 2006, pp.31-44
summary	DYNAMO (Dynamic Architectural Memory Online) is an interactive platform to share ideas, knowledge and insights in the form of concrete building projects among designers in different contexts and at different levels of expertise. Interaction with various user groups revealed two major thresholds: submitting project material to the platform takes time, effort, and specific skills; in addition, designers tend to sense a psychological threshold to share their ideas and insights with others. In response to this ‘free-ridership’, the paper proposes to conceive DYNAMO as an associative network of projects, and develops ideas about how the links in this network can be determined and updated by exploiting insights implicitly available in project documentation and user (inter)actions. This should allow DYNAMO to learn from the insights of all designers using the platform, active contributors and ‘free-riders’ alike, without any awareness on their side and to apply these insights to continuously enhance its performance.
keywords	architectural design; self-organisation; usage logs; connectionism
series	other
type	normal paper
email
last changed	2006/02/01 14:28

_id	8b8e
authors	Kvan, Th., Wong, J.T.H. and Vera, A.H.
year	2000
title	Supporting Structural Activities in Design: A Multiple-Case Study
source	Proceedings, Fifth International Conference on Computer Supported Cooperative Work in Design (CSCWD2000), Hong Kong, November 29 – December 2, 2000, pp. 116-120
summary	This paper describes case studies in design teaching and their analysis; examining the role of structural activities and other solution searching activities in design learning and problem solving. The case studies follow students working on the same problem under two conditions – one group is taught using traditional face-to-face teaching while the other group is supported by a text-based web board. The design activities of two students were followed in each condition through a semester; followed by in-depth interviews at the end of semester. Interviews and logs were coded according to an activity-based model of design activity. The results show that cases with above average design work involved more structural activities than the mediocre cases. It also showed that design problem dissections are more organized in the better cases. These successful cases engaged in textual expression of their design solutions. Computer tools for design should therefore support textual representation in addition to graphic; video or audio.
keywords	Collaborative Design; Computer Supported Collaborative Work; Structure Activities; Text
series	other
email
last changed	2002/11/15 18:29

_id	caadria2020_149
id	caadria2020_149
authors	Larsen, Niels Martin, Aagaard, Anders Kruse and Kieffer, Lynn Hyun
year	2020
title	Digital Workflows for Natural Wood in Constructions
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. 125-134
doi	https://doi.org/10.52842/conf.caadria.2020.1.125
summary	This research challenges current linear processing methods for standardised timber. The current industry does not leave room for irregular shapes of naturally grown wood. This paper describes a bespoke design and fabrication method that leverages these natural irregularities of the wood. The customised development of a digital tool allows the distribution of the non-standard material to form a structure and the associated robotic machining processes of the individual logs. This research seeks to motivate a more inclusive, diverse and sensitive culture of processing and building with wood while exploring the unique aesthetic qualities of non-standardised wood.
keywords	robotic fabrication; digital workflows; wood processing
series	CAADRIA
email
last changed	2022/06/07 07:52

_id	acadia19_500
id	acadia19_500
authors	Larsen, Niels Martin; Anders Kruse Aagaard
year	2019
title	Exploring Natural Wood
source	ACADIA 19:UBIQUITY AND AUTONOMY [Proceedings of the 39th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-578-59179-7] (The University of Texas at Austin School of Architecture, Austin, Texas 21-26 October, 2019) pp. 500-509
doi	https://doi.org/10.52842/conf.acadia.2019.500
summary	By investigating methods for using computation and digital manufacturing technologies to integrate material properties with architectural design tools, the research in this paper aims at revealing new potentials for the use of wood in architecture. Through an explorative approach, material particularities and fabrication methods are explored and combined into new workflows and architectural expressions. The research looks into different properties and capacities of wood, but the main part of the experimentation revolves around crooked oak logs. Due to their irregularities, these logs are normally discarded. However, through the methods suggested in this research, they are instead matched with unique processing informed by their divergence. The research presents a workflow for handling the discrete shapes of sawlogs in a system that both involve the collecting of material, scanning/digitization, handling of a stockpile, computer analysis, design, and robotic manufacturing. The workflow includes multiple custom-made solutions for handling the complex and different shapes and data of wood logs in a highly digitized machining and fabrication environment. The suggested method is established through investigations of wood as a natural material, studies of the production lines in the current wood industry, and experimentation in our in-house laboratory facilities. This up-cycling of discarded wood supply establishes a non-standard workflow that utilizes non-standard material stock and leads to a critical articulation of today’s linear material economy. The research thereby gives an example of how the natural forms and properties of sawlogs can be directly used to generate new structures and spatial conditions.
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:52

_id	caadria2022_361
id	caadria2022_361
authors	Lok, Leslie and Bae, Jiyoon
year	2022
title	Timber De-Standardized 2.0 : Mixed Reality Visualizations and User Interface for Processing Irregular Timber
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. 121-130
doi	https://doi.org/10.52842/conf.caadria.2022.2.121
summary	Timber De-Standardized 2.0†is a mixed reality (MR) user interface (UI) that utilizes timber waste produced by manufacturing dimensional lumber, suggesting an expanded notion for "material usability‚ in timber construction. The expanded notion of designing with discarded logs not only requires new tools and technologies for cataloguing, structuring, and fabricating. It also relies on new methods and platforms for the visualization and design of these structures. As a†MR†UI,†Timber De-Standardized†enables professionals and non-professionals alike to seamlessly design with irregular logs and to create viable structural systems using an intuitive†MR†environment. In order to develop a†MR†environment with this level of competency, the research aims to finesse the visualization techniques in the immersive full-scale†3D†environment and to minimize the use of alternative 2D UI(s). The research methodology†focuses on†(1) cataloguing and extracting basic properties of various tree logs, (2)†refining mesh visualization for better user interaction, and†(3)†developing†the†MR†UI to increase user design agency with custom menu lists and operations.†This methodology will extend the usability of†MR†UI protocols to a broader audience while democratizing design and enabling the user as co-creator.
keywords	Irregular Tree Logs, Wood Construction, Augmented and Mixed Realities, Mixed Reality User Interface, Co-Creative Design, Digital representation and visualization, SDG 9, SDG 12, SDG 13
series	CAADRIA
email
last changed	2022/07/22 07:34

_id	acadia21_222
id	acadia21_222
authors	Lok, Leslie; Samaniego, Asbiel; Spencer, Lawson
year	2021
title	Timber De-Standardized
source	ACADIA 2021: Realignments: Toward Critical Computation [Proceedings of the 41st Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-986-08056-7]. Online and Global. 3-6 November 2021. edited by B. Bogosian, K. Dörfler, B. Farahi, J. Garcia del Castillo y López, J. Grant, V. Noel, S. Parascho, and J. Scott. 222-231.
doi	https://doi.org/10.52842/conf.acadia.2021.222
summary	Timber De-Standardized is a framework that salvages irregular and regular shaped tree logs by utilizing a mixed reality (MR) interface for the design, fabrication, and assembly of a structurally viable tree log assembly. The process engages users through a direct, hands-on design approach to iteratively modify and design irregular geometry at full scale within an immersive MR environment without altering the original material. A digital archive of 3D scanned logs are the building elements from which users, designing in the MR environment, can digitally harvest (though slicing) and place the elements into a digitally constructed whole. The constructed whole is structurally analyzed and optimized through recursive feedback loops to preserve the user’s predetermined design. This iterative toggling between the physical and virtual emancipates the use of irregular tree log structures while informing and prioritizing the user’s design intent. To test this approach, a scaled prototype was developed and fabricated in MR. By creating a framework that links a holographic digital design to a physical catalog of material, the interactive workflow provides greater design agency to users as co-creators in processing material parts. This participation enables users to have a direct impact on the design of discretized tree logs that would otherwise have been discarded in standardized manufacturing. This paper presents an approach in which complex tree log structures can be made without the use of robotic fabrication tools. This workflow opens new opportunities for design in which users can freely configure structures with non-standardized elements within an intuitive MR environment.
series	ACADIA
type	paper
email
last changed	2023/10/22 12:06

_id	acadia20_176p
id	acadia20_176p
authors	Lok, Leslie; Zivkovic, Sasa
year	2020
title	Ashen Cabin
source	ACADIA 2020: Distributed Proximities / Volume II: Projects [Proceedings of the 40th Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 978-0-578-95253-6]. Online and Global. 24-30 October 2020. edited by M. Yablonina, A. Marcus, S. Doyle, M. del Campo, V. Ago, B. Slocum. 176-181
summary	Ashen Cabin, designed by HANNAH, is a small building 3D-printed from concrete and clothed in a robotically fabricated envelope made of irregular ash wood logs. From the ground up, digital design and fabrication technologies are intrinsic to the making of this architectural prototype, facilitating fundamentally new material methods, tectonic articulations, forms of construction, and architectural design languages. Ashen Cabin challenges preconceived notions about material standards in wood. The cabin utilizes wood infested by the Emerald Ash Borer (EAB) for its envelope, which, unfortunately, is widely considered as ‘waste’. At present, the invasive EAB threatens to eradicate most of the 8.7 billion ash trees in North America (USDA, 2019). Due to their challenging geometries, most infested ash trees cannot be processed by regular sawmills and are therefore regarded as unsuitable for construction. Infested and dying ash trees form an enormous and untapped material resource for sustainable wood construction. By implementing high precision 3D scanning and robotic fabrication, the project upcycles Emerald-Ash-Borer-infested ‘waste wood’ into an abundantly available, affordable, and morbidly sustainable building material for the Anthropocene. Using a KUKA KR200/2 with a custom 5hp band saw end effector at the Cornell Robotic Construction Laboratory (RCL), the research team can saw irregular tree logs into naturally curved boards of various and varying thicknesses. The boards are arrayed into interlocking SIP façade panels, and by adjusting the thickness of the bandsaw cut, the robotically carved timber boards can be assembled as complex single curvature surfaces or double-curvature surfaces. The undulating wooden surfaces accentuate the building’s program and yet remain reminiscent of the natural log geometry which they are derived from. The curvature of the wood is strategically deployed to highlight moments of architectural importance such as windows, entrances, roofs, canopies, or provide additional programmatic opportunities such as integrated shelving, desk space, or storage.
series	ACADIA
type	project
email
last changed	2021/10/26 08:08

_id	acadia22pr_154
id	acadia22pr_154
authors	Lok, Leslie; Zivkovic, Sasa
year	2022
title	UNLOG: A Deployable and Lightweight Timber Frame
source	ACADIA 2022: Hybrids and Haecceities [Projects Catalog of the 42nd Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9860805-7-4]. University of Pennsylvania Stuart Weitzman School of Design. 27-29 October 2022. edited by M. Akbarzadeh, D. Aviv, H. Jamelle, and R. Stuart-Smith. 154-159.
summary	Easily deployed and assembled, UNLOG unfolds several logs into an undulating and lightweight timber A-frame structure through robotic kerfing and bending-active kinematics. The installation provokes new methods of framing for timber construction.
series	ACADIA
type	project
email
last changed	2024/02/06 14:06

_id	acadia03_046
id	acadia03_046
authors	Maze, J., McGlothlin, M. and Tanzer, K.
year	2003
title	Fluid (in)form:Influencing Design Through Dynamic Particle Simulation
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 357-363
doi	https://doi.org/10.52842/conf.acadia.2003.357
summary	“My earliest childhood memories are related to a ranch my family owned near the village of Mazamitla. It was a pueblo with hills, formed by houses with tile roofs and immense eaves to shield passersby from the heavy rains which fall in that area. Even the earth’s color was interesting because it was red earth. In this village, the water distribution system consisted of great gutted logs, in the form of troughs, which ran on a support structure of tree forks, five meters high, above the roofs. The aqueduct crossed over the town, reaching the patios, where there were great stone fountains to receive the water. The patios outside the stables, with cows and chickens, all together. Outside, in the street, there were iron rings to tie the horses. The channeled logs, covered with moss, dripped water all over town, of course. It gave this village the ambience of a fairy tale.”(Luis Barragan,qtd in Ambasz 1976)
series	ACADIA
email
last changed	2022/06/07 07:58

_id	ecaade2016_129
id	ecaade2016_129
authors	Pak, Burak and Aydemir, Zeynep
year	2016
title	Understanding the Verbal Concepts Appropriated by the Students in the Architectural Design Studio
source	Herneoja, Aulikki; Toni Österlund and Piia Markkanen (eds.), Complexity & Simplicity - Proceedings of the 34th eCAADe Conference - Volume 1, University of Oulu, Oulu, Finland, 22-26 August 2016, pp. 387-394
doi	https://doi.org/10.52842/conf.ecaade.2016.1.387
wos	WOS:000402063700043
summary	The main aim of this study is to gain a better understanding of the role of verbal concepts in the architectural design processes of the students in a studio context. To serve this purpose, we carried out a 15-week studio in an urban architectural masters design studio at KU Leuven Faculty of Architecture. We observed the use of verbal concepts in time during this studio and analyzed the design processes of the students based on their self-report logs on the studio web platform. Based on these, we conducted a statistic analysis and a network mapping study. We found that early concepts provide a starting point for developing fully-fledged specialized design ideas. Furthermore, a higher number of links between concepts indicated their importance during the process. In addition, the data collection and research methods proved to be reliable for mapping the design process of the students as well as revealing the evolution of the ideas in the studio.
keywords	Design Studio; Concepts; Crowdsourcing; Web Platform; Self-reporting; Design Research
series	eCAADe
email
last changed	2022/06/07 08:00

_id	cf2003_m_079
id	cf2003_m_079
authors	PETRIC, J., CONTI, G. and UCELLI, G.
year	2003
title	Designing within Virtual Worlds
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. 213-224
summary	This paper celebrates the successful outcome of a trial of an innovative multi-platform distributed design decision support system in which the shared design environment exists within the virtual world. The outcome is the result of a sustained three-year research and development effort, within an internationally recognised research group. The project set itself a number of ambitious targets within the broad spectrum of distributed design decision support, viz: • A multi-platform environment: the trial demonstrates inter-operability of different machine platforms - from a home PC to an international standard Virtual Reality Centre. • A distributed environment: the trial demonstrates the high level of understanding amongst the design team separated by time and space. • An ability to propose, discuss and agree upon, design decision from within the virtual world. Hitherto, virtual environments were viewing galleries; designers had to leave them to effect design changes in a conventional CAD package. The trial described in the paper amply demonstrates the potential to design, collaboratively and, in distributed mode, from within the virtual world. The two ideas upon which the system (known as JCAD-VR) is built are: • That all the users present in the virtual world have to be able to share the same virtual environment in a "transparent fashion"; • The user interface, instead of the traditional menu/windows based layout, is part of the virtual world itself. Any element of the interface becomes an object belonging to the 3D world and therefore it is treated as any other object. Each element of the interface can then be moved or scaled according to the user’s needs. The entire project is based on client-server architecture where every user logs into a virtual world and starts sharing design tasks with other users. The authors propose to present a video which demonstrates the positive outcome of the trials to date. More importantly, perhaps, the authors will put the achievements of the R+D into the context of past aspirations and developments in the subject area and, most importantly of all, suggest how these modest achievements will impact on the next decade of increasingly rapid R+D.
keywords	collaboration, distributed design, interface, virtual environment
series	CAAD Futures
email
last changed	2003/09/22 12:21

_id	c0f5
authors	Russell, Peter
year	2001
title	Creating Place in the Virtual Design Studio
source	Proceedings of the Ninth International Conference on Computer Aided Architectural Design Futures [ISBN 0-7923-7023-6] Eindhoven, 8-11 July 2001, pp. 231-242
summary	The current wave of attempts to create virtual design studios has demonstrated a wide range of didactical as well as computational models. Through work performed over the past year, an evolution of many of these concepts has been created which fosters a sense of place. This aspect of place has to do with identity and community rather than with form and space. Initial virtual design studio projects were often merely a digital pin-up board, which enabled distributed and asynchronous criticism and review. However, the web sites were more analogous to a directory than to the studio setting of an upper level design problem. The establishment of a truly distributed design studio in the past year, which involved design teams spread over three universities (not parallel to one another) led to the need for an independent place to share and discuss the student's work. Previous virtual design studios have also established web sites with communication facilities, but one was always alone with the information. In order to enhance this virtual design studio and to give it a sense of place, a studio platform that serves as a console for participants was developed. The console is a front end to a dynamic database which mediates information about the participants, their work, timetables and changes to the dynamic community. Through a logon mechanism, the presence of members is traceable and displayed. When a member logs onto the console, other members currently online are displayed to the participant. An online embedded talk function allows informal impromptu discussions to occur at a mouseclick, thus imitating ways similar to the traditional design studio setting. Personal profiles and consultation scheduling constitute the core services available. Use of the platform has proven to be well above expected levels. The students often used the platform as a meeting place to see what was going on and to co-ordinate further discussions using other forums (videoconferences, irc chats or simple telephone conversations. Surveys taken at the end of the semester show a strong affinity for the platform concept in conjunction with a general frustration in pursuing collaboration with low bandwidth communication channels.
keywords	Virtual Environments, Virtual Design Studio, Internet Utilisation
series	CAAD Futures
email
last changed	2006/11/07 07:22

_id	caadria2022_402
id	caadria2022_402
authors	Schumann, Kyle
year	2022
title	Learning from Logs: Introductory Analog and Digital Pedagogy Addressing Material Irregularity
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. 355-364
doi	https://doi.org/10.52842/conf.caadria.2022.2.355
summary	Advanced computational visioning, modeling and fabrication technologies are becoming increasingly accessible to non-expert users, allowing designers to engage complex forms and materials with increasing control and precision. Nonetheless, beginning designers often struggle to maintain authorship when mastering new software, resulting in designs shaped by the biases of the digital tools at hand. The act of translation between physical and digital poses particular difficulty. This paper presents a sequential pedagogy in which students are introduced to both manual and digital analytical and fabrication processes with the goal of understanding, analyzing, and addressing material irregularity. Techniques and tools employed include digital modeling in Rhinoceros, 3D scanning, computational analysis in Grasshopper, traditional woodshop tools, 3D printing, laser cutting, and CNC routing. The outcomes and criteria for evaluating student projects are discussed: in particular, the learning opportunities afforded by using irregularly sized and shaped material that allowed students to develop creative ways of working with standard woodworking and digital fabrication tools. Additional challenges due to virtual teaching and financial considerations are addressed through salvaged materials and democratized technologies.
keywords	digital pedagogy, democratized technology, digital fabrication, computation, material irregularity, SDG 4, SDG 13, SDG 12
series	CAADRIA
email
last changed	2022/07/22 07:34

_id	acadia22_614
id	acadia22_614
authors	Schumann, Kyle; MacDonald, Katie; Hassell, Abigail
year	2022
title	Tangential Timber
source	ACADIA 2022: Hybrids and Haecceities [Proceedings of the 42nd Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9860805-8-1]. University of Pennsylvania Stuart Weitzman School of Design. 27-29 October 2022. edited by M. Akbarzadeh, D. Aviv, H. Jamelle, and R. Stuart-Smith. 614-627.
summary	This paper pilots a structural application for nonlinear wood through the development of a custom parametric workflow in which cross sections of logs are digitally imaged, analyzed, and manipulated, then physically manufactured into interlocking structural units. The project addresses resource scarcity and embodied carbon by defining a use for nonlinear wood, various species of which are found across the globe but are limited in use due to the constraints of conventional sawmilling.
series	ACADIA
type	paper
email
last changed	2024/02/06 14:04

_id	acadia23_v2_318
id	acadia23_v2_318
authors	Spencer, Lawson; Htet Kyaw, Alexander; Zivkovic, Sasa; Lok, Leslie
year	2023
title	Extended Reality Workflows for Multi-Material Construction and Assemblies
source	ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 2: Proceedings of the 43rd Annual Conference for the Association for Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9860805-9-8]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 318-328.
summary	The architecture and construction industries have been developing methods to integrate Augmented Reality (AR) and Mixed Reality (MR) workflows into the building industry for 1-to-1 scale design, visualization, and paperless fabrication. While these AR workflows have been primarily focused on mono-material assemblies, this paper investigates the potential of AR and MR for multi-material fabrication, combining various materials and structural components throughout each phase of the construction of the Unlog Tower. The installation uses infested and dying ash trees to construct a 36-foot-tall triangular, lightweight timber structure. The Unlog Tower leverages bending active elastic kinematics to stretch robotically kerfed logs braced by threaded rods and tube steel. Three extended reality (XR) workflows were explored for the construction of this bespoke timber struc- ture: (1) fiducial marker coordinated AR instruction, (2) multiple QR code AR instruction, and (3) gesture-based MR instruction. These XR workflows incorporate feedback-based construction notation and animation for the assembly of non-standard natural materials and standardized parts through three construction phases: materials to parts, parts to prefab modules, and onsite assembly. The research highlights the potential of AR and MR workflows for human-machine interaction in robotic fabrication, analog means of making, prefabrication, onsite construction, and coordination. The result of this investigation has demonstrated many advantages and disadvantages of varying AR/MR workflows in facili- tating the construction of multi-material and multi-phase structural assemblies.
series	ACADIA
type	paper
email
last changed	2024/04/17 13:59

_id	cdrf2021_45
id	cdrf2021_45
authors	Wen Gao, Xuanming Zhang, Weixin Huang, and Shaohang Shi
year	2021
title	Command2Vec: Feature Learning of 3D Modeling Behavior Sequence—A Case Study on “Spiral-stair”
source	Proceedings of the 2021 DigitalFUTURES The 3rd International Conference on Computational Design and Robotic Fabrication (CDRF 2021)
doi	https://doi.org/https://doi.org/10.1007/978-981-16-5983-6_5
summary	In this study, we applied machine learning to mine the event logs generated in modeling process for behavior sequence clustering. The motivation for the study is to develop cognitively intelligent 3D tools through process mining which has been a hot area in recent years. In this study, we develop a novel classification method Command2Vec to perceive, learn and classify different design behavior during 3D-modeling aided design process. The method is applied in a case study of 112 participate students on a ‘Spiral-stair’ modeling task. By extracting the event logs generated in each participate student’s modeling process into a new data structures: ‘command graph’, we classified participants’ behavior sequences from final 99 valid event logs into certain groups using our novel Command2Vec. To verify the effectiveness of our classification, we invited five experts with extensive modeling experience to grade the classification results. The final grading shows that our algorithm performs well in certain grouping of classification with significant features.
series	cdrf
email
last changed	2022/09/29 07:53

_id	acadia20_114p
id	acadia20_114p
authors	Zivkovic, Sasa; Havener, Brian; Battaglia, Christopher
year	2020
title	Log Knot
source	ACADIA 2020: Distributed Proximities / Volume II: Projects [Proceedings of the 40th Annual Conference of the Association of Computer Aided Design in Architecture (ACADIA) ISBN 978-0-578-95253-6]. Online and Global. 24-30 October 2020. edited by M. Yablonina, A. Marcus, S. Doyle, M. del Campo, V. Ago, B. Slocum. 114-119.
summary	Log Knot, developed by the Robotic Construction Laboratory (RCL) at Cornell University, is a robotically fabricated architectural installation that establishes a method for variable compound timber curvature creation utilizing both regular and irregular roundwood geometries. Moreover, the project develops methods for minimal formwork assembly and moment force optimization of customized mortise and tenon joints. Following the logic of a figure-8 knot, the project consists of an infinite loop of roundwood, curving three-dimensionally along its length. There are a variety of techniques to generate single curvature in wood structures – such as steam bending (Wright et al., 2013) or glue lamination (Issa and Kmeid, 2005) – but only a few techniques to generate complex curvature from raw material within a single wooden structural element exist. To construct complex curvature, the research team developed a simple method that can easily be replicated. First, the log is compartmentalized, establishing a series of discrete parts. Second, the parts are reconfigured into a complex curvature “whole” by carefully manipulating the assembly angles and joints between the logs. Timber components reconfigured in such a manner can either follow planar curvature profiles or spatial compound curvature profiles. Based on knowledge gained from the initial joinery tests, the research team developed a custom tri-fold mortise and tenon joint, which is self-supportive during assembly and able to resist bending in multiple directions. Using the tri-fold mortise and tenon joint, a number of full-scale prototypes were created to test the structural capacity of the overall assembly. Various structural optimization protocols are deployed in the Log Knot project. While the global knot form is derived from spatial considerations – albeit within the structurally sound framework of a closed-loop knot structure – the project is structurally optimized at a local level, closely calibrating structural cross-sections, joinery details, and joint rotation in relation to prevailing load conditions.
series	ACADIA
type	project
email
last changed	2021/10/26 08:03

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