Spatial phenomenology requires potential illumination

2003 ◽  
Vol 26 (4) ◽  
pp. 425-426
Author(s):  
James A. Schirillo
Keyword(s):  
Visual System ◽  
Spatial Model ◽  
Dimensional Space ◽  
Color Constancy ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Three Dimensional Space

Collapsing three-dimensional space into two violates Lehar's “volumetric mapping” constraint and can cause the visual system to construct illusory transparent regions to replace voxels that would have contained illumination. This may underlie why color constancy is worse in two dimensions, and argues for Lehar to revise his phenomenal spatial model by putting “potential illumination” in empty space.

3D Navigational Path Planning

Robotica ◽  
1990 ◽  
Vol 8 (3) ◽  
pp. 195-205 ◽  
Author(s):  
T.M. Rao ◽  
Ronald C. Arkin
Keyword(s):  
Path Planning ◽  
Mobile Robot ◽  
Recent Literature ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Polyhedral Objects ◽  
3D Surfaces ◽  
Three Dimensional Space

SUMMARYThe problem of path planning for a mobile robot has been studied extensively in recent literature. Much of the work in this area is devoted to the study of path planning for an earth-bound robot in two dimensions. In this paper, we explore the problem for a robot that can fly in three dimensional space or crawl on 3D surfaces or use a combination of both. We assume that the obstacles can be modeled as polyhedral objects.

Young Children's Painting of the Sky and the Ground

1990 ◽  
Vol 13 (1) ◽  
pp. 49-65 ◽  
Author(s):  
Vicky Lewis
Keyword(s):  
Young Children ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Air Gap ◽  
Age Range ◽  
Three Dimensional Space

Young children often leave a gap between the sky and the horizon in their drawings and paintings. Study 1 examined the landscape paintings of a group of 45 7-10-year-old children and found the children leaving an air gap to be significantly younger than those painting the sky to the horizon. In addition the omission of the air gap was associated with the use of devices to represent three-dimensional space in two dimensions. In Study 2 a group of 7-8-year old chldren painted landscapes on two occasions separated by 7-7.5 months. This study suggested that there are a series of stages between leaving a gap and painting the sky to meet the horizon. It is concluded that painting the sky to meet the horizon may be one of several strategies for representing three-dimensional space, which develops over the age range studied.

Human path navigation in a three-dimensional world

2013 ◽  
Vol 36 (5) ◽  
pp. 544-545 ◽  
Author(s):  
Michael Barnett-Cowan ◽  
Heinrich H. Bülthoff
Keyword(s):  
Path Integration ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Neural Representation ◽  
Head Posture ◽  
Computational Load ◽  
Path Navigation ◽  
Upright Head ◽  
Three Dimensional Space

AbstractJeffery et al. propose a non-uniform representation of three-dimensional space during navigation. Fittingly, we recently revealed asymmetries between horizontal and vertical path integration in humans. We agree that representing navigation in more than two dimensions increases computational load and suggest that tendencies to maintain upright head posture may help constrain computational processing, while distorting neural representation of three-dimensional navigation.

Color Constancy in a Photograph Perceived as a Three-Dimensional Space

2004 ◽  
Vol 11 (4) ◽  
pp. 288-296 ◽  
Author(s):  
Yoko Mizokami ◽  
Mitsuo Ikeda ◽  
Hiroyuki Shinoda
Keyword(s):  
Dimensional Space ◽  
Color Constancy ◽  
Three Dimensional ◽  
Three Dimensional Space

Scanning Path Planning in Laser Bending of Tube Based on Curvature

2011 ◽  
Vol 264-265 ◽  
pp. 6-11
Author(s):  
Xu Yue Wang ◽  
Jun Wang ◽  
L.J. Wang ◽  
W.J. Xu ◽  
D.M. Guo
Keyword(s):  
Path Planning ◽  
Extreme Point ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Two Dimensional ◽  
Laser Bending ◽  
Scanning Path ◽  
Scanning Path Planning ◽  
Three Dimensional Space

A method is presented based on geometric-curvature characteristics in which a scanning path planning for laser bending of a straight tube into a curve tube in a two- and three-dimensional space. In a two-dimensional (plane) bending, the steel tube is divided into several segments according to the extreme point and inflection point of the desired shape of the tube, taking the extreme point as the initial place of the path planning, using different scanning space for every segment in order to identify the scanning paths. For a tube bending in a three-dimensional space, a projection decomposition method is used, where the three-dimensional is decomposed into two two-dimensions, and respective scanning path planning and process parameters are thus acquired. By combining the data in the two-dimensional planes, the three-dimensional scanning path plan was obtained. Finally, an experimental verification is carried out to bend straight tubes into a two-dimensional sinusoidal and a three-dimensional helical coil-shaped tube. The results show that the proposed method of scanning path planning is effective and feasible.

scholarly journals Fotografías que seccionan una mirada a Le Corbusier

2015 ◽  
Author(s):  
Carlos Barberá Pastor
Keyword(s):  
Public Space ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Le Corbusier ◽  
Two Dimensions ◽  
Domestic Space ◽  
The Public ◽  
Palabras Clave ◽  
Three Dimensional Space

Resumen: El texto, titulado Fotografías que seccionan una mirada a Le Corbusier, analiza algunas imágenes de casas construidas de Le Corbusier y Pierre Jeanneret. Las fotografías tienen características comunes que nos presentan un plano en dos dimensiones, el marco de un hueco, y un espacio en tres dimensiones, el de la habitación representada. Las fotografías, al mostrar un hueco y un espacio, incitan a pensar que se están refiriéndose a la experiencia arquitectónica de traspasar un vano. Interpretaciones sobre el uso y la actividad en el interior del espacio doméstico en relación con el espacio público componen el resto del escrito. Abstract: The text, entitled Photographs that severed a look at Le Corbusier, analyzes some pictures to houses built by Le Corbusier and Pierre Jeanneret. The photographs have common characteristics that lead to the interpretation that we have a plan in two dimensions within a hole, and three-dimensional space, the room represented. The photographs, showing a hole and a space, incite to think that they are referring to the architectural experience of crossing a vain. Interpretations on the use and activity within the domestic space in relation to the public space make up the rest of the writing.  Palabras clave: Le Corbusier, Iglesia, Savoye, Cook, Planeix, Ozenfant. Keywords: Le Corbusier; Church; Savoye; Cook; Planeix; Ozenfant. DOI: http://dx.doi.org/10.4995/LC2015.2015.681

An Integrated Recommender System Using Semantic Web With Social Tagging System

2019 ◽  
Vol 15 (2) ◽  
pp. 47-67 ◽  
Author(s):  
R. Indra ◽  
Muthuraman Thangaraj
Keyword(s):  
Semantic Web ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Latent Semantic Indexing ◽  
Two Dimensions ◽  
Social Tagging ◽  
Recommendation Algorithms ◽  
Precision Time ◽  
Value Decomposition ◽  
Three Dimensional Space

Social tagging systems (STSs) allow collaborative users to share and annotate many types of resources with descriptive and semantically meaningful information in freely chosen text labels. STS provides three recommendations such as tag, item and user recommendations. Existing recommendation algorithms transform the three dimensional space of user, resource, and tag into two dimensions using pair relations in order to apply existing techniques. However, users may have different interests for an item, and items may have multiple facets. To circumvent this, a new system that models three types of entities user, tag and item in a STS as a 3-order tensor is proposed. The sparsity is reduced using stemming and predictions are made by applying latent semantic indexing using randomized singular value decomposition (RSVD). The proposal provides all the three recommendations using semantic web and shows notable improvements in terms of effectiveness through indices such as recall, precision, time and space.

scholarly journals Recognizability of Tetrahedral Picture Languages

2019 ◽  
Vol 8 (4) ◽  
pp. 7379-7383
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Vital Role ◽  
Generative Models ◽  
Two Dimensions ◽  
Generative Model ◽  
Space Filling ◽  
Sequential Space ◽  
Picture Languages ◽  
Three Dimensional Space

In two dimensions, tiling the plane plays a vital role. Many picture generative models were attempted to tile the three dimensional space. A. Dharani et al. [6] introduced a new theoretical picture generative model to tile a three dimensional space using tetrahedral tile in two different ways namely Sequential Space Filling Grammar (SSFG) and Parallel Space Filling Grammar (PSFG). Local and recognizable tetrahedral picture languages are introduced in this paper and some of its properties are studied.

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