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	ecaade2016_134
id	ecaade2016_134
authors	Kieferle, Joachim B. and Katodrytis, George
year	2016
title	Fabricating Semi Predictable Surfaces - A workshop series on digitally fabricating freeform surfaces with aggregates
doi	https://doi.org/10.52842/conf.ecaade.2016.1.329
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. 329-334
summary	Working with CNC routers and robots is widely used in architecture and fabrication. Our paper describes ways to use these tools more intuitively yet accurately and without a profound knowledge. We have developed a workshop format, in which even inexperienced participants are able to quickly start working with these tools by shaping the non-rigid material sand. Various production methods and tools are incorporated such as "manual", "gestural", "CNC" and "robotic" to create various 3D forms which are captured by methods like 3D scanning, vacuum forming or glueing.
wos	WOS:000402063700037
keywords	Education; Digital Fabrication; Sand surface; Formwork
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ecaade2008_204
id	ecaade2008_204
authors	Kieferle, Joachim; Katz, Neil; Thaleck, Kruno
year	2008
title	From Shape to Fabrication
doi	https://doi.org/10.52842/conf.ecaade.2008.537
source	Architecture in Computro [26th eCAADe Conference Proceedings / ISBN 978-0-9541183-7-2] Antwerpen (Belgium) 17-20 September 2008, pp. 537-544
summary	There is a close relation between building design and fabrication. However still it is mostly a sequential process where the fabrication with its geometric chances and limitations is only to a small extend taken into account in early design phases. In this paper we describe a protoype form work project, realized out of styrofoam cut out with a CNC hot wire-cutting system and coated with the Claraporon coating system. Due to the linear nature of hot wire cutting the surfaces that can be created are ruled surfaces. They are discussed in a more general way as well as first exercises with ruled surfaces in teaching.
keywords	Digital fabrication, Form work, Ruled surface
series	eCAADe
email
last changed	2022/06/07 07:52

_id	acadia03_010
id	acadia03_010
authors	Kilian, Axel
year	2003
title	Fabrication of Partially Double-Curved Surfaces out of Flat Sheet Material Through a 3D Puzzle Approach
doi	https://doi.org/10.52842/conf.acadia.2003.075
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. 75-83
summary	The topic of this paper is the connection of digital modeling with generative programming and rapid prototyping, to produce physical sketch surface models. The physical surface models are assembled out of developable strips connected through a puzzle-like detail. The use of programming as a design approach allows the generation of connection details that corresponds to the rules of flat sheet rapid prototyping techniques of laser cutting and water jet cutting. With numerically controlled cutting, there is no need to keep the joint detail related to manually achievable forms or to apply a standardized dimension. This paper demonstrates the possibilities of programming to generate cutting geometries that adapt to the local surface properties. The larger perspective of the research approach is the question of how to formulate and capture design intention through programming. What influence does the use of generative modeling in combination with rapid prototyping have on the design language of physical objects?
series	ACADIA
email
last changed	2022/06/07 07:52

_id	acadia14projects_27
id	acadia14projects_27
authors	Kim, Heamin; Zhenhuan, Xu; Heng, Zhang
year	2014
title	Formative Tectonic Screen: Craft In Digital Age
doi	https://doi.org/10.52842/conf.acadia.2014.027
source	ACADIA 14: Design Agency [Projects of the 34th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 9789126724478]Los Angeles 23-25 October, 2014), pp. 27-30
summary	The Formative Tectonic Screen Project’, we will illustrate the advantage that we can achieve by applying computation to Origami. By doing so, we can easily manipulate the surface plan by applying computation design and we can see how the origami 2D plan will come up to 3dimensional in real time simulation.
keywords	Digital Fabrication, Origami, Kangaroo, Computation Design
series	ACADIA
type	Research Projects
email
last changed	2022/06/07 07:52

_id	sigradi2018_1473
id	sigradi2018_1473
authors	Kimi Cogima, Camila; V. V. de Paiva, Pedro; Dezen-Kempter, Eloisa; G. De Carvalho, Marco Antonio
year	2018
title	Digital scanning and BIM modeling for modern architecture preservation: the Oscar Niemeyer’s Church of Saint Francis of Assisi
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 457-462
summary	The Building Information Modelling (BIM) technology enabled improvement in the design, construction and maintenance stages highly. In the field of existing buildings, including historical assets, this technology has not yet had the same impact. This paper presents a methodology to create an intelligent digital model for an outstanding building from modern architecture in Brazil using multiple reality-based technologies. The fusion of the different point cloud raw data generated a high-resolution Dense Surface Model (DSM), the base of an accurate and detailed parametric Model. This study demonstrated the potential of digital surveying, including low-cost sensors, and BIM for built heritage documentation.
keywords	Reality-based surveying; Point cloud; As-is model; Building Information Modelling; Modern Heritage
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	acadia06_554
id	acadia06_554
authors	Klinger, Kevin
year	2006
title	Perimetric Boundary
doi	https://doi.org/10.52842/conf.acadia.2006.x.t0l
source	Synthetic Landscapes [Proceedings of the 25th Annual Conference of the Association for Computer-Aided Design in Architecture] p. 554
summary	A strong dichotomy exists between the factors of fluctuating natural orders apparent in the river, and the striation of the land by human historical and cultural influence. The installation exists as surface of influence between these forces. The form is informed by parameters of light, vista, material, and process through a method of digitally folding and perforating sheets of steel to enable a self structuring membrane which rises and falls from the plateau edge. A swath of prairie grasses, rising and falling in their own cycle, demarcates this edge. A screen of 15 weathering steel sheets stretches for 63’ across the boundary of the human order and the encroaching erosion of the natural realm. From the initial generation of geometry pairings, well “adapted” pairings are spliced from the parent and “bred” with similarly fit geometries. The fit of these pairs is based on the relationships between the form and the desired criteria of reflection, screening, and framing. To properly combine these pairings, several mutations occur (indicated in red).
series	ACADIA
email
last changed	2022/06/07 07:49

_id	acadia12_305
id	acadia12_305
authors	Kock, Jeffrey ; Bradley, Benjamin ; Levelle, Evan
year	2012
title	The Digital-Physical Feedback Loop: A Case Study
doi	https://doi.org/10.52842/conf.acadia.2012.305
source	ACADIA 12: Synthetic Digital Ecologies [Proceedings of the 32nd Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-62407-267-3] San Francisco 18-21 October, 2012), pp. 305-314
summary	Kukje Art Center, Seoul’s new gallery designed by SO-IL, features a totally bespoke chainmail mesh system (submission note: the authors are not affiliated with SO-IL). A single sheet of complex-curved, tensioned mesh, made up of interlocking 40mm diameter stainless steel rings, wraps the building. This paper discusses the stages of a feedback loop process employed by the authors to refine a digital model of the mesh. The mesh’s perimeter attachment system does not prescribe ring locations, allowing the mesh to form find for itself during installation. As a result, the digital model must capture the behavioral tendencies of the mesh as it negotiates the building’s geometry. Paramount in meeting this challenge was the use of physical mockups. At each stage of the feedback loop process, the working digital model was used to develop a physical mockup of increased scale and complexity, and this mockup was used to refine the digital model. Ultimately, the model output of a mesh relaxation algorithm was used as the basis for engineering simulations and predictions of the mesh vertical ringcount needed at specific locations around the building. Mesh vertical ringcount predictions are validated relative to a 1:1 mockup and the installed Kukje Art Center mesh.
keywords	minimal surface , chainmail mesh , form finding , dynamic relaxation , finite element analysis , feedback loop , tensioned fabric , physical mockup , bespoke cladding , Kukje , Seoul
series	ACADIA
type	normal paper
email
last changed	2022/06/07 07:51

_id	ddss9450
id	ddss9450
authors	Kohsaka, Hiroyuki
year	1994
title	Spatial Decision Support System for Retail Activity
source	Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary	This presentation proposes an architecture of Spatial Support System (SDSS) for retail activity. This SDSS is made up of four key modules: data, monitoring, spatial analysis/modelling, and map and report generators. In the data module, spatial shopping data are gathered from Point of Sales (POS) Systems as well as trade area surveys. Two examples will be presented to collect spatial shopping data. One is from an ordinal trade area survey and the other is from point IC cards. The monitoring module can represent retail trade areas as three-dimensional surfaces as well as contour maps by using a colour graphics display after a cartographic analysis which consists of gridding and interpolation of these data. As an application example of monitoring module, retail trade area for a store or a shopping street will be shown as a three-dimensional surface. In addition, themonitoring module can describe a retail structure consisting of the trade area of several retail stores to analyze the spatial competition of them. In the spatial analysis/modelling module, optimization methods search for an optimal location of a new store and an impact analysis assesses the locational impacts of the store upon the existing stores. An optimal location of new supermarket will be solved as an example for this module.
series	DDSS
email
last changed	2003/08/07 16:36

_id	acadia06_095
id	acadia06_095
authors	Kolarevic, Branko
year	2006
title	Manufacturing Surface Effects
doi	https://doi.org/10.52842/conf.acadia.2006.095
source	Synthetic Landscapes [Proceedings of the 25th Annual Conference of the Association for Computer-Aided Design in Architecture] pp. 95-103
summary	The paper examines the newfound capacity to digitally design and manufacture highly crafted material and surface effects. It traces an emerging trajectory in contemporary architecture aimed at the decorative effects of digitally crafted surface patterns and textures, as a potential return to ornamentation in architecture. It surveys practices whose approach to form and pattern varies from the “ornamented minimalism” of Herzog and de Meuron to the “expressive exuberance” of Greg Lynn. The paper also describes the different digital modes of material production aimed at particular surface effects, as in series of panels with repetitive, yet unique decorative relief or cutout patterns, striated surface configurations, etc.
series	ACADIA
email
last changed	2022/06/07 07:51

_id	4e59
authors	Koparkar, P. A. and Mudur, S.P.
year	1986
title	Generation of Continuous Smooth Curves Resulting from Operations on Parametric Surface Patches
source	Computer Aided Design. May, 1986. pp. 193-206 : ill. includes bibliography
summary	In recent years a number of techniques based on the subdivision principle have been suggested for detecting the curves resulting from the intersection of two parametrically defined surface patches. Silhouette curves of surfaces can also be detected using analogous techniques. Usually the output is a set of pixels or line segments which form the complete curve, though not necessarily in an ordered manner. This paper presents data structures for maintaining the result of subdivision, and algorithms for tracing the curves in a continuous fashion. Using a few iterations of the Newton-Raphson technique the curve points may be refined to any required precision. For each point on the curve the nonlinear equations are chosen by looking at the local topological nature of the curve so as to guarantee convergence of the Newton-Raphson technique in one or two iterations
keywords	curved surfaces, parametrization, curves, intersection, relaxation, geometric modeling, computational geometry
series	CADline
last changed	2003/06/02 14:41

_id	ecaade2013_067
id	ecaade2013_067
authors	Kretzer, Manuel
year	2013
title	Information Materials
doi	https://doi.org/10.52842/conf.ecaade.2013.1.615
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. 615-623
summary	This paper questions the current use of materials in architecture, which furthers the preference of surface and form over inherent material properties. It then investigates recent advancements towards the notion of a Digital Materiality, comparing various international research activities and approaches. It concludes with the potentials of Smart Materials for the creation of dynamic, adaptive spatial design. With a focus on the work of the Author it represents a number of projects that have been realized in this area within the past years and gives an insight in his recently established Materiability Research Network, a community platform that reveals Smart Materials, their properties and how to self-make them in an applied hands-on manner.
wos	WOS:000340635300064
keywords	Smart materials; digital materiality; open source; do-it-yourself; adaptive architecture.
series	eCAADe
email
last changed	2022/06/07 07:51

_id	62ad
authors	Kuan, L.P. and Hinds, John K.
year	1975
title	A New Breed of Geometry for Numerical Control-Surfaces Through General Curves
source	pp. 133- 169 : ill. (pp.144-169)
summary	Recent geometric developments in the CAM-I Sculptured Surface project show promising applications to the perplexing problems of describing blends and fillets for conventional geometric parts, as well as providing greatly increased capability in the expression of pure sculptured shapes. The new geometry -- named 'Surfaces Through General Curves' -- is integrated into both the APT processor and the CASPA preprocessor. The CASPA (acronym for Computer-Aided Sculptures Pre-APT) processor is discussed briefly. All graphics material for this presentation was prepared through the use of this preprocessor. The original purpose of this talk was to discuss a preprocessor to the APT system. This preprocessor -- CASPA -- was first released in July of 1975 and contains the majority of sculptured geometry combined with a graphics processor. The preprocessor has been a great success as a development tool and has also been used by a number of sponsors in design and manufacturing applications. The system has been so successful that the main theme of this talk had to be changed to cover the new geometric developments in Sculptured Surfaces which were made possible by having a development tool such as CASPA. So the first part of this talk will sketch an outline of CASPA and the second part will describe the concepts and applications for some of these new geometric developments. Briefly, the CASPA system was developed in response to a single critical requirement: the need to have a system, simpler and more flexible then the full APT system, for implementing and testing new developments in Sculptured Geometry. The CASPA system today contains all of the Sculptured Geometric capability together with an integrated and extensive 3-dimensional graphics capability. It is a single-pass processor with a very simple, fixed-format input and interfaces with APT by punching APT- readable canonical forms. it is also capable of generating APT readable 'GOTO' cards to accomplish numerical control pattern machining of geometric models
keywords	curves, curved surfaces, representation, computational geometry, CAM, mechanical engineering
series	CADline
last changed	2003/06/02 13:58

_id	ecaade2013_026
id	ecaade2013_026
authors	Kucukoglu, J. Gozde and Colakoglu, Birgul
year	2013
title	Algorithmic Form Generation for Crochet Technique
doi	https://doi.org/10.52842/conf.ecaade.2013.2.273
source	Stouffs, Rudi and Sariyildiz, Sevil (eds.), Computation and Performance – Proceedings of the 31st eCAADe Conference – Volume 2, Faculty of Architecture, Delft University of Technology, Delft, The Netherlands, 18-20 September 2013, pp. 273-278
summary	In architecture use of generative computation suggests a possibility of rethinking the form finding process. In order to generate form, one method could be predefining first the production technique and constraining the form by the rules of it. In this study crochet-knitting technique is chosen as a production technique. To explore various forms developed through this technique; a computational model, which the behavior of crochet-knitted surface is embedded into, is developed. This paper explains the process of decoding the behavior of a crochet-knitted surface for a computational model in order to extract the crochet-knitting patterns of complex geometrical surfaces.
wos	WOS:000340643600027
keywords	Form generation; crochet technique; hyperbolic geometry; decoding rule
series	eCAADe
email
last changed	2022/06/07 07:52

_id	d8ea
authors	Kumar, Subodh and Manocha, Dinesh
year	1995
title	Efficient rendering of trimmed NURBS surfaces
source	Computer-Aided Design, Vol. 27 (7) (1995) pp. 509-521
summary	An algorithm for the interactive display of trimmed nurbs surfaces is presented. The algorithm converts the nurbs surfaces to Bézier surfaces, and nurbs trimming curves toBézier curves. It tessellates each trimmed Bézier surface into triangles, and renders them using the triangle rendering capabilities common in current graphics systems. Itmakes use of tight bounds for the uniform tessellation of Bézier surfaces into cells and it traces the trimming curves to compute the trimmed regions of each cell. Thisoperation is based on the tracing of trimming curves, intersection computation with the cells, and triangulation of the cells. The resulting technique also makes use of spatialand temporal coherence between successive frames for cell computation and triangulation. Polygonization anomalies such as cracks and angularities are avoided as well. Thealgorithm can display trimmed models described using thousands of Bézier surfaces at interactive frame rates on high end graphics systems.
keywords	Trimmed Nurbs, Bezier Surfaces, Rendering
series	journal paper
last changed	2003/05/15 21:33

_id	sigradi2011_100
id	sigradi2011_100
authors	Kutschat Hanns, Daniela; De Marchi, Polise Moreira
year	2011
title	Estratégias de reconfiguração do espaço urbano – cidade superfície: diálogos entre arte e cidade mediados por intervenções artísticas em fachadas e muros na cidade de São Paulo [Urban space reconfiguration strategies - surface city: dialogs between art and city mediated through artistic interventions on facades and walls in the city of São Paulo]
source	SIGraDi 2011 [Proceedings of the 15th Iberoamerican Congress of Digital Graphics] Argentina - Santa Fe 16-18 November 2011, pp. 526-529
summary	This paper discusses multiple aspects of the city through examples of artistic interventions which see the city as complex and dynamic layers in constant change. This paper investigates the spatial configuration changes of São Paulo city in material surfaces as facades and walls. The understanding of urban surfaces as "'mediative' spatiality" (Ferrara, 2008) assigns communication categories to urban surfaces; the visual condition is discussed in this paper.
keywords	Surface city; art; urban intervention; urban landscape
series	SIGRADI
email
last changed	2016/03/10 09:54

_id	ecaade2020_184
id	ecaade2020_184
authors	Kycia, Agata and Guiducci, Lorenzo
year	2020
title	Self-shaping Textiles - A material platform for digitally designed, material-informed surface elements
doi	https://doi.org/10.52842/conf.ecaade.2020.2.021
source	Werner, L and Koering, D (eds.), Anthropologic: Architecture and Fabrication in the cognitive age - Proceedings of the 38th eCAADe Conference - Volume 2, TU Berlin, Berlin, Germany, 16-18 September 2020, pp. 21-30
summary	Despite the cutting edge developments in science and technology, architecture to a large extent still tends to favor form over matter by forcing materials into predefined, often superficial geometries, with functional aspects relegated to materials or energy demanding mechanized systems. Biomaterials research has instead shown a variety of physical architectures in which form and matter are intimately related (Fratzl, Weinkamer, 2007). We take inspiration from the morphogenetic processes taking place in plants' leaves (Sharon et al., 2007), where intricate three-dimensional surfaces originate from in-plane growth distributions, and propose the use of 3D printing on pre-stretched textiles (Tibbits, 2017) as an alternative, material-based, form-finding technique. We 3D print open fiber bundles, analyze the resulting wrinkling phenomenon and use it as a design strategy for creating three-dimensional textile surfaces. As additive manufacturing becomes more and more affordable, materials more intelligent and robust, the proposed form-finding technique has a lot of potential for designing efficient textile structures with optimized structural performance and minimal usage of material.
keywords	self-shaping textiles; material form-finding; wrinkling; surface instabilities; bio-inspired design; leaf morphogenesis
series	eCAADe
email
last changed	2022/06/07 07:52

_id	caadria2024_365
id	caadria2024_365
authors	Lahtinen, Aaro, Gardner, Nicole, Ramos Jaime, Cristina and Yu, Kuai
year	2024
title	Visualising Sydney's Urban Green: A Web Interface for Monitoring Vegetation Coverage between 1992 and 2022 using Google Earth Engine
doi	https://doi.org/10.52842/conf.caadria.2024.2.515
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. 515–524
summary	With continued population growth and urban expansion, the severity of environmental concerns within cities is likely to increase without proper urban ecosystem monitoring and management. Despite this, limited efforts have been made to effectively communicate the ecological value of urban vegetation to Architecture, Engineering and Construction (AEC) professionals concerned with mitigating these effects and improving urban liveability. In response, this research project proposes a novel framework for identifying and conveying historical changes to vegetation coverage within the Greater Sydney area between 1992 and 2022. The cloud-based geo-spatial analysis platform, Google Earth Engine (GEE), was used to construct an accurate land cover classification of Landsat imagery, allowing the magnitude, spatial configuration, and period of vegetation loss to be promptly identified. The outcomes of this analysis are represented through an intuitive web platform that facilitates a thorough understanding of the complex relationships between anthropogenic activities and vegetation coverage. A key finding indicated that recent developments in the Blacktown area had directly contributed to heightened land surface temperature, suggesting a reformed approach to urban planning is required to address climatic concerns appropriately. The developed web interface provides a unique method for AEC professionals to assess the effectiveness of past planning strategies, encouraging a multi-disciplinary approach to urban ecosystem management.
keywords	Urban Vegetation, Web Interface, Landsat Imagery, Land Cover Classification, Google Earth Engine
series	CAADRIA
email
last changed	2024/11/17 22:05

_id	c4b8
authors	Lane, Jeffrey M. and Riesenfeld, Richard F.
year	1980
title	A Theoretical Development for the Computer Generation and Display of Piecewise Polynomial Surfaces
source	IEEE Transactions on Pattern Analysis and Machine Intelligence. January, 1980 Vol. PAM 1-2: pp. 35-46 : ill.
summary	includes a short bibliography. Two algorithms for parametric piecewise polynomial evaluation and generation are described. The mathematical development of these algorithms is shown to generalize to new algorithms for obtaining curve and surface intersections and for the computer display of parametric curves and surfaces
keywords	display, algorithms, intersection, CAD, computer graphics, B-splines, curved surfaces
series	CADline
last changed	2003/06/02 13:58

_id	sigradi2020_157
id	sigradi2020_157
authors	Lanzara, Emanuela; Capone, Mara
year	2020
title	Tangential surfaces to optimize digital manufacturing of complex shapes
source	SIGraDi 2020 [Proceedings of the 24th Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Online Conference 18 - 20 November 2020, pp. 157-165
summary	The knowledge of geometric-mathematical rules allows to solve several problems about complex systems design and manufacturing. Geometric genesis of surfaces and their properties represent the main basis to solve both constructive and measurement problems. A developable surface can be manufactured starting from a flat strip, using a flexible and non- deformable material. Geometry studies properties that don't change and, therefore, the shape of the strip to obtain a certain configuration after a series of rigid movements. Our goal is to test different approches (Additive Manufacturing vs Subtractive Manufacturing) to manufacture a lamp using a tangential developable surface.
keywords	Generative design, tangential surfaces, digital fabrication, developable surfaces, Additive Manufacturing, Subtractive Manufacturing
series	SIGraDi
email
last changed	2021/07/16 11:48

_id	ad42
authors	Lasser, Dieter
year	1986
title	Intersection of parametric Surfaces in the Bernstein-Bexier Representation
source	Computer Aided Design May, 1986. vol. 18: pp. 188-192 : ill. includes bibliography.
summary	A user-friendly 'divide-and-conquer' algorithm, which finishes quickly, is presented for finding all the intersection curves between two parametric surfaces in the Bernstein-Bezier representation. The underlying idea of the algorithm is to deal with the Bezier net instead of the surface description itself. By alternately subdividing the Bezier nets, and estimating the intersection area, a finite element mesh is created in the intersection region of the surfaces. The intersection is approximated by polygons computed by plane-plane-intersections using planes defined by Bezier points of the refined Bezier nets. Contour lines can also be produced by the algorithm
keywords	divide-and-conquer, CAD, algorithms, parametrization, curved surfaces, Bezier, curves, intersection
series	CADline
last changed	1999/02/12 15:09

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