Cell (geometry) - Factbites

Cell (geometry) - Factbites
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Topic: Cell (geometry)

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	Category.org - The Online Shopping Center: Books - Science
		Molecular Biology of the Cell sets forth the current understanding of cell biology (completely updated as of Autumn 2001), and it explores the intriguing implications and possibilities of the great deal that remains unknown.
		Molecular Biology of the Cell is the classic in-depth text reference in cell biology.
		The text progresses from basic physical organic chemistry and molecular orbital theory through functional groups and their reactivity, finally culminating in appropriate, but not exhaustive, chapters on biomolecules.
	www.category.org /browse/books/75/index.html (7686 words)

	Trench DMOS power transistor with field-shaping body profile and three-dimensional geometry
		In a closed-cell geometry, the trench side wall oxide is grown under nonplanar, two-dimensional conditions at intersections of trench faces.
		However, the open-cell or stripe geometry is inherently more susceptible to "bipolar breakdown," which is controlled in part by the resistance between the intrinsic body region below the gate region and the body contact.
		2B is a schematic illustration of a trench DMOS power transistor, constructed in a closed-cell geometry.
	www.freepatentsonline.com /5298442.html (7686 words)

	3DM PuraMatrix Publications
		These hydrogels allow the proper three dimensional conformation and folding, with applications in DNA and protein microarrays, proteomics, cell surface signaling and many applications involving the study of proteins in physiological-like microenvironments..
		A major challenge in choosing an appropriate scaffold for cartilage repair is the identification of a material that can simultaneously stimulate high rates of cell division and high rates of cell synthesis of phenotypically specific ECM macromolecules until repair evolves into steady-state tissue maintenance.
		We systematically vary three chief aspects of this sequence type: (1) the hydrophobic side chains: (2) the charged side-chains: and (3) the number of repeats.
	www.puramatrix.com /pubs/index.htm (7686 words)

	Cone - Wikipedia, the free encyclopedia
		Also in geometry, the cone of an arbitrary set X means the union of all line segments connecting a fixed point to points of X.
		In vertebrate anatomy, a cone cell is a type of light-sensitive cell found along with rods in the retina of the eye.
		In ceramics manufacture, a pyrometric cone is a conical or pyramidal mineral stick that is used to gauge the temperature of an oven.
	www.wikipedia.org /wiki/Cone (7686 words)

	Cell - Wikipedia, the free encyclopedia
		In higher-dimensional Euclidean geometry, especially in 4-dimensional geometry, a cell refers to a 3-dimensional facet in a polytope.
		Cell is the name of a microprocessor developed jointly by IBM, Toshiba, and Sony.
		A cell is a single unit or compartment, enclosed by a border or wall.
	en.wikipedia.org /wiki/Cell (7686 words)

	Cell - Wikipedia, the free encyclopedia
		In higher-dimensional Euclidean geometry, especially in 4-dimensional geometry, a cell refers to a 3-dimensional facet in a polytope.
		A cell is a single unit or compartment, enclosed by a border or wall.
		Cell is the name of a microprocessor developed jointly by IBM, Toshiba, and Sony.
	en.wikipedia.org /wiki/Cell (216 words)

	United States Patent Application: 0040091084
		A projected planar view of a selected view level image plane is formed at the alpha blend plane by transferring the image pixel cell value at the intersect of the ray trace and the selected view level plane to the image pixel cell at the intersect of the ray trace and the alpha blend plane.
		One defines the geometry by which the images are formed, the data arrays that contain the image data, and the coordinates of an object space.
		The first pixel of the image plate is coincident with the coordinate axis origin and the plate is parallel with the XZ plane.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040091084".PGNR.&OS=DN/20040091084&RS=DN/20040091084 (14019 words)

	Dendroarchitecture of Relay Cells in Thalamic Barreloids: A Substrate for Cross-Whisker Modulation -- Varga et al. 22 (14): 6186 -- Journal of Neuroscience
		Superimposed contours outline the cross-section geometry of the barreloids at the level of the cell bodies (barreloids are identified above drawings).
		The cell in B was injected with BDA and sections were permeabilized by freeze-thawing over liquid nitrogen.
		graphs of Figure 3 show four projections of dendritic field geometry
	www.jneurosci.org /cgi/content/full/22/14/6186 (14019 words)

	Rod - Wikipedia, the free encyclopedia
		Rod (geometry), a straight and slender stick; a wand; a cylinder; hence, any slender bar, as of wood or metal.
		Rod cell, the light-sensitive cells in the retina of the eye.
		Rod (cryptozoology), a species of creature that flits about in the air at such a high speed as to not be seen by the naked eye, but which can be caught on video.
	en.wikipedia.org /wiki/Rod (189 words)

	Electrochemistry C
		The cell geometry usually does not ensure that exactly and only one cubic centimeter of solution will carry the current; therefore, the cell has to be calibrated to obtain the specific conductance of the solution.
		"Cell voltage" usually refers to nonequilibrium conditions, that is when current is flowing through the cell (although this convention is not always followed).
		Current that is bypassing bipolar electrodes in a series coupled cell assembly (due to insufficient sealing or improper piping around the bipolar electrode) and therefore is not producing the required chemical change (electrode reaction).
	www.corrosion-doctors.org /Dictionary/Dictionary-C.htm (189 words)

	Cell - Wikipedia, the free encyclopedia
		Cell (mathematics), in Euclidean geometry, refers to a 3-dimensional facet in a polytope
		A cell is a single unit or compartment, enclosed by a border or wall.
		A cell is usually part of a larger structure.
	en.wikipedia.org /wiki/Cell (232 words)

	120-cell.htm
		The 12 cells are adjacent to the 12 cells that are adjacent to the central dodecahedron.The geometry can be comprehended by means of this figure:
		the dual 600-cell, are the centres of 30 dodecahedral cells of the (spherical) 120-cell:
		The pentagons are sections of dodecahedral cells parallel to a face of such a cell.
	members.home.nl /fg.marcelis/120-cell.htm (793 words)

	ABINIT : GEOMETRY BUILDER + SYMMETRY RELATED input variables.
		After having generated a geometry thanks to rotation, translation and repetition of objects, it is possible to remove some atoms, in order to create vacancies (vacnum and vaclst).
		The geometry builder can indeed repeat these objects (objarf or objbrf), rotate them (objaro or objbro) with respect to an axis (objaax or objbax), and translate them (objatr or objbtr).
		If the geometry builder is only used to rotate or translate an object, without repeating it, simply use 1 1 1, which is also the Default value.
	www.abinit.org /ABINIT/Infos_v4.4/vargeo.html (793 words)

	CellPress Online
		“When small fat cells embedded in what is essentially a 3D molecular cage receive the appropriate external signals during development, it appears that they change their geometry—remodeling the surrounding matrix using an enzyme to chew the fibers,” said the study’s senior author Stephen Weiss of the University of Michigan, Ann Arbor.
		Cell Press announced that access to the recent online archive of Cell and the other premier journals of the Cell Press collection became freely available beginning in January 2005.
		In the May 5, 2006 Cell, researchers report the serendipitous discovery that the initial development of fat requires a “remodeling” protein that must first make way for the lipid-laden tissue’s growth.
	www.cellpress.com (732 words)

	Basic cell structure
		Cell theory is really important because it provided, and still provides one of the great unifying theories in biology: one that says in spite of all the vast diversity of organisms, they are are united at a very fundamental level, namely the presence of cells.
		The cell is considered to be the smallest structure in biology that has all the properties of living things and an understanding of cells and the basics of cell structure and function is critical to making sense out of biology.
		Indeed, if you were to average the diameter of all the cells on the planet, the average would certainly be far less than that because most of the cells on this planet are bacteria and the average bacterial cell is 3-5 micrometers in diameter.
	staff.jccc.net /pdecell/cells/basiccell.html (1597 words)

	researchactivities.html
		If the hippocampus acts as a cognitive map, then our model place cell model suggests that the map will be distorted in a predictable way if the geometry of the environment is manipulated.
		Cells with properties similar to place cells have recently been discovered in the human hippocampus, so one might be expect it to play a similar role in spatial memory and navigation.
		The place cell representation of space is different from other spatial representations in the brain, many of which can be thought of as capturing the relationship between individual stimuli and the body or some part of it (i.e., egocentric representations).
	www.icn.ucl.ac.uk /thartley/researchactivities.html (1597 words)

	Turbulent Thermal Convection
		This competition of forces is parameterized by the Rayleigh number, which is the temperature difference, but appropriately normalized to take into account the geometry of the convection cell and the physical properties of the fluid.
		Since liquids typically have positive thermal expansion coefficient, the hot liquid at the bottom of the cell expands and produces an unstable density gradient in the fluid layer.
		Detailed understanding of the spatial structure and dynamics of the convective rolls and coherent thermal plumes is important in evaluating the overall heat-transfer process and scaling laws which distinguish soft and hard turbulence.
	www.enseeiht.fr /hmf/travaux/CD9598/travaux/optmfn/BES_PHOENICS/96-97/Caini-Gelene/RB_convectio_tur.html (960 words)

	Plasma convection [Oulu]
		It is usually thought that the high latitude cells (that are on open field lines all the time) are due to reconnection, and the low latitude cells are formed due to viscous interaction (Axford and Hines, 1961).
		Observations of just the ionospheric convection signature cannot distinguish between viscous and reconnection based convections, but the measured high cross-polar cap potentials and the dependence of the convection geometry on IMF By suggest that the merging process dominates over viscous interaction when the IMF has a southward component.
		This creates the two cell pattern relating to the convection electrojets in the highly conducting auroral region (see, e.g., Clauer and Kamide, 1985; also term ionospheric DP 2 or "disturbance polar of the second type" current system has been used).
	www.oulu.fi /~spaceweb/textbook/convect.html (478 words)

	GNUbik
		object, which is in fact a cons cell whose first component is a list describing the geometry of the cube, and the second component is a vector of six vectors of nxn items, where n is the size of the cube.
		The geometry list consists of a version number, which will change if the definition of the cube object ever changes (scripts should check this to ensure compatibility or else things will surely break); the current version is 1 (one).
		This interface can be used with any cube geometry that GNUbik supports, but is not intuitive for humans and the API may change in the future.
	www.gnu.org /software/gnubik/manual/html_node/Raw-interface.html (478 words)

	Citations: Mathematical foundations of constructive solid geometry: General topology of closed regular sets - Requicha, Tilove (ResearchIndex)
		We trim all primitive boundaries against each other to obtain a collection of tentative cells; these are the linear and elliptic segments as well as the....
		Thus cells in b rep can constructed from pieces of primitive boundaries, assuming that every such cell can be somehow individually represented.
		Mathematical foundations of constructive solid geometry: General topology of closed regular sets.
	citeseer.ist.psu.edu /context/517714/0 (478 words)

	CatalystTutorial
		This allows the small scale flow effects caused by the brick geometry to be included in the calculation and overcomes the need to model the actual brick geometry which would be too computationally expensive if not impossible.
		At this stage it should be noted what the cell IJK numbers are that define the 1D flow block volume.
		The steady state flow bench tests are performed by adjusting the mass flow rate to achieve a pressure drop across the catalyst brick of 1000 Pa. The flow bench analyses are therefore setup with a 1.01 bar inlet boundary condition and a 1 bar outlet boundary condition.
	www.software.ricardo.com /support/tutorials/vectis/CatalystTutorial.htm (478 words)

	Reversible kinetics in a channel flow cell geometry
		The differences arise since the transport in the channel geometry is inherently two-dimensional, typically with an effectively thinner diffusion layer at the upstream edge of the electrode than at the downstream periphery; under steady-state and Lévêque conditions [24] the diffusion layer thickness varies with the cube root of distance along the electrode [26].
		Moreover for many applications it is important that the electrode is located within a flow system to permit continuous monitoring and to enhance the speed of the analysis.
		However, as noted above, much ASV is usefully conducted under flowing conditions where the current density will, as a result of the influx of fresh electroactive material, be greater at the upstream edge of the electrode than at the downstream edge.
	physchem.ox.ac.uk /~rgc/research/ea/comp/cfc.shtml (478 words)

	PLATON MANUAL
		The coordination geometry about a single atom may be examined with this instruction.
		The crystallographic or molecular data such as coordinates, thermal parameters, cell dimensions and symmetry, possibly generated by the structure determination or refinement program, may be read from a file.
		In addition, in the case that the molecule lies on a special position, the primary coordinate list is expanded with additional symmetry generated atoms in order to handle the geometry of the complete molecule.
	www.csb.yale.edu /userguides/graphics/pluton/html/pl100200.html (478 words)

	Zome Geometry -- 24 Cell Projection Model
		Verify that there are 24 vertices and 24 octahedral cells, with eight edges per vertex.
		Here is a new exploration, a beautiful projection (i.e., 3D shadow of a 4D object) of the 24-cell, which is the regular 4D polytope consisting of 24 regular octahedra, three around each edge.
		This is an orthogonal projection, so the octahedra are compressed and slanted, but parallel lines remain parallel; so the three square equators of each octahedron show up as parallelograms.
	www.georgehart.com /zomebook/24-cell.html (242 words)

	Digital Geometry & Topology
		The discipline of "Digital Geometry and Topology" deals with discrete sets modelling digitized subsets of Euclidean spaces.
		A uniform grid or cell structure is assumed for representing these discrete sets in image analysis or computer graphics.
		If your publication is still missing then you may just insert it.
	www.citr.auckland.ac.nz /dgt (69 words)

	Electrochemistry Dictionary
		The cell geometry usually does not ensure that exactly and only one cubic centimeter of solution will carry the current; therefore, the cell has to be calibrated to obtain the specific conductance of the solution.
		In storage batteries and fuel cell stacks many cells are usually connected internally, and it is a very efficient design feature to use a single planar structure for electrodes in two neighboring cells and also as the electrical interconnection between them.
		If the electrolysis is carried out in an undivided cell and the chlorine gas and the caustic are allowed to mix and react with each other, sodium hypochlorite (bleach) is produced if the cell operates close to room temperature, and sodium chlorate is produced if the cell is operated near the boiling point of water.
	electrochem.cwru.edu /ed/dict.htm (69 words)

	Graphics Archive - 120 Cell Soap Bubble by John Sullivan
		This image, produced by postdoc John Sullivan of the Geometry Center, represents tessellation of the 3-sphere by 120 regular dodecahedra.
		Three dodecahedra meet along each edge, at 120 degree angles, so the projection can be thought of as a cluster of soap bubbles.
		This is the first rendering of soap bubbles made from the basic laws of optics for thin films.
	www.geom.umn.edu /graphics/pix/General_Interest/Digital_Art/sullivan-120cell.html (176 words)

	Construction of the Hyper-Dodecahedron
		Recalling that in this shape we have four cells per vertex and three per edge, a little calculation yields the following table:.
		And these values satisfy Euler's Formula for elliptic geometry: V + F = E + C. matt
		All that is left is to connect the remaining four vertices (the red dots to each other, and the green dots to each other) with an edge.
	www.theory.org /geotopo/120-cell (449 words)

	DC MetaData for: Special Symplectic Connections
		We show that the symplectic reduction of (an open cell of) a parabolic
		58F05 Hamiltonian and Lagrangian systems; symplectic geometry, See also { 70Hxx, 81S10 }
		orbifold is locally equivalent to one of these symplectic reductions.
	www.esi.ac.at /Preprint-shadows/esi1475.html (449 words)

	SACRED GEOMETRY
		The basic fundamental building blocks of our Universe are based on the mathematics and form of Sacred Geometry.
		From the farthest reaches of the cosmos to the atomic structure of a single cell within the body, the same laws of form and mathematics apply.
		- wonderful site about mandalas, labyrinths, sacred geometry, geomancy and more!
	www.luminanti.com /geometry.html (380 words)

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Topic: Cell (geometry)

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