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Showing 1 to 20 of 27 for “"cubical"”.
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Simplicial and cubical complexes : anologies and differences
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1994.
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A Kruskal-Katona theorem for cubical complexes
The optimal number of faces in cubical complexes which lie in cubes refers to the maximum number of faces that can be constructed from a certain number of faces of lower dimension, or the minimum number of faces necessary to construct a certain number of faces of higher dimension. If <i>m</i> is …
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Cubical small-cancellation theory and large-dimensional hyperbolic groups
… of the coned-off space associated to a C(9) cubical presentation is trivial, and use this to provide classifying spaces for proper actions for the fundamental groups of many quotients of square complexes admitting such cubical presentations. When the cubical presentations satisfy a condition …
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Cubical Models of Homotopy Type Theory - An Internal Approach
This thesis presents an account of the cubical sets model of homotopy type theory using an internal type theory for elementary topoi. Homotopy type theory is a variant of Martin-Lof type theory where we think of types as spaces, with terms as points in the space and elements of the identity type as …
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The relationship between the crushing strength of brittle materials and the size of cubical specimens tested
Cubes of coal have been tested in compression in the past, and it has been found. that the following formula, relating the compressive strength to the size of the cube can be applied: P = k .a- n Where P is the compressive strength in pounds per square inch. a is the edge dimension os specimens …
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Maximal Surfaces in Complexes
Cubical complexes are defined in a manner analogous to that for simplicial complexes, the chief difference being that cubical complexes are unions of cubes rather than of simplices. A very natural cubical complex to consider is the complex C(k_1,...,k_n) where k_1,...,k_n are nonnegative integers. …
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The Discrete Hodge Star Operator and Poincaré Duality
… is dedicated to extending these results to a cubical setting, via the introduction of a cubical version of Whitney forms. A cubical setting provides a place for Robin Forman's complex of nontraditional differential forms, defined in [7], in the uniïfication of analytic and topological …
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Structure of Turbulent Boundary Layers and Surface Pressure Fluctuations on a Patch of Large Roughness Elements
… roughness patches containing hemispherical and cubical elements. The elements were 3 mm in height and spaced 16.5 mm apart in an array containing 7 streamwise rows and 6 spanwise columns for a total of 42 elements per patch. The boundary layer thickness was approximately 60 mm, so the ratio of …
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Homogeneous models and their toposes of supported sets
… sets. Of various well-known toposes, such as cubical sets and simplicial sets, it is shown that they can be presented as a topos of this kind. It is argued that these examples can be understood as coming from a homogeneous model, in the sense of model theory, but formulated in …
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Polarizing Optical Devices Based on Embedded One-Dimensional Subwavelength-Structured Photonic-Crystal Layers
… layer (SWS 1-D PCL) embedded in a high-index cubical prism is presented. The PBS is based on index matching and total transmission for the p polarization and total internal reflection for the s polarization at the prism-PCL interface at a 45o angle of incidence. A high extinction ratio in …
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Nanoscale thermal systems in subcritical region
… by using an approximate analytical analysis. A cubical system is defined for five different configurations based on the minimization of the interfacial surface area. These systems are then analyzed to define their thermodynamic behavior by using a technique to minimize the Helmholtz free energy. …
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ΒΙΟΛΟΓΙΑ ΚΑΙ ΣΥΜΠΕΡΙΦΟΡΑ ΣΤΟ ΕΡΓΑΣΤΗΡΙΟ ΤΟΥ CHAETORELLIA AUSTRALIS HERING (DIPTERA, TEPHRITIDAE), ΕΧΘΡΟΥ ΤΟΥ ΖΙΖΑΝΙΟΥ CENTAUREA SOLSTITIALIS L. (ASTERALES, ASTERACEAE), ΜΕ ΕΜΦΑΣΗ ΣΤΗ ΣΥ...
… CONICAL OBJECTS WERE PREFERED TO CYLINDRICAL AND CUBICAL ONES. FURTHERMORE, IT WAS FOUND THATSPHERES OF 5 AND 10 MM DIAMETER WERE PREFERED FOR OVIPOSITION TO 15 AND 20 MM ONES. YELLOW AND ORANGE COLORED OBJECTS WERE PREFERED FOR OVIPOSITION TO BLACK,GREEN, BLUE, RED AND WHITE ONES.
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Optimum Processing of 1 mm by Zero Coal
… model is developed which better handles cubical and rectangular coal particles. Much of the lower efficiency of fine coal cleaning is due to poor size separation of the fine-sized raw coal which results in misplaced high ash fines reporting to the coarser size streams. By sending coarser …
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Radiant Auto-Ignition of Wood
… An open-cone radiant source heated an insulated cubical vertical sample 4 cm on a side. Infrared (IR) and normal video cameras were used to view the surface of the wood. Surface temperature (by thermocouple and IR) and mass loss were continuously recorded. The wood grain orientation was aligned …
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Analysis of an Antineutrino Detector
… freely programmable gate array. Moving from cubical lattice segmentation to half-cube segmentation allowed for more lithiated sheets to be added to the detector, improving both spatial resolution and neutron capture efficiency. This additional segmentation complicates event reconstruction, …
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Arrangement of minors in the positive Grassmannian
… the simplices. We then introduce the notion of cubical distance on the dual graph of the triangulation, and study its relations with these arrangements. In addition, we show that arrangements of largest minors induce a structure of a partially ordered set on the entire collection of minors. We …
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An inertial measurement unit for user interfaces
… inertial measurement unit (IMU), with a cubical form factor (1.25 inches on a side) was constructed to collect the data, providing updates at 15 ms intervals. This data is analyzed for periods of activity using a windowed variance algorithm, whose thresholds can be set analytically. These …
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Finite element analysis of shear resistant mechanisms for biolaminate interfaces
… The FEA RVE had one million uniform 8-micron cubical 8-node elements. The geometrically nonlinear sawtooth features are explicitly modeled. An elastic-plastic model described the nonlinear material response. The analysis focused on evaluating the nonlinear material response in terms of energy …
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Experimental and computational determination of wind loads on netted/sheeted scaffolds.
… loading on access scaffolds erected around a cubical building, clad by impermeable sheeting or permeable debris netting. The subject was investigated experimentally by tests in a wind-tunnel and theoretically using computational fluid dynamics techniques. The results were verified from the …
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