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A meta-analysis of 21 studies found that the F&P Text Level Gradient system did not lead to effective reading fluency interventions. [ 8 ] Matthew Burns, a reading researcher at the University of Florida, has studied assessments within the F&P Text Level Gradient system and found that they result in 54% total accuracy and correctly identify low ...
New chart types “Pie-of-Pie” and “Bar-of-Pie” break down a slice of a pie as a pie or bar sub-chart respectively (this also enables import of such charts from OOXML files created with Microsoft Office) Text inside chart’s titles, text boxes and shapes (and parts thereof) can now be formatted using the Character dialog; Core / General
The gradient of the function f(x,y) = −(cos 2 x + cos 2 y) 2 depicted as a projected vector field on the bottom plane. The gradient (or gradient vector field) of a scalar function f(x 1, x 2, x 3, …, x n) is denoted ∇f or ∇ → f where ∇ denotes the vector differential operator, del.
A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders .
Let X be an affine space over a field k, and V be its associated vector space. An affine transformation is a bijection f from X onto itself that is an affine map; this means that a linear map g from V to V is well defined by the equation () = (); here, as usual, the subtraction of two points denotes the free vector from the second point to the first one, and "well-defined" means that ...
A decision tree is a decision support recursive partitioning structure that uses a tree-like model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
where A f ′(p) is the Jacobian matrix of the mapping f −1 ∘ f ′, evaluated at the point f ′(p). The collection of tangent vectors to S at p naturally has the structure of a two-dimensional vector space. A tangent vector in this sense corresponds to a tangent vector in the previous sense by considering the vector
An example of the Landolt C eye chart (also known as the Japanese eye chart). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]