Making a Contour Map

The purpose of this activity is to learn how contour maps can be made by hand. Students plot data from GLOBE schools on a map with latitude and longitude lines and draw contours based on the values plotted. A suggested extension and how to use this activity as an assessment is included. Educational levels: Middle school, High school

Introduction of the Profit Surface

The profit surface is a visualization technique for data computed from trading rules. I simulate price paths and operate the trading rules to compute cumulative returns for the rule under different specifications. The specifications are pairs of integers, filter lag lengths, so a contour plot is useful to display cumulative returns for more specifications than can be shown otherwise.Mathematics, Finance, Trading, Moving Average

An isobar contour plot progrz

A computer program was developed to obtain ; isobar contours from the total pressure measurements at the engine face of an 1/3 scale model of an aircraft intake duct provided by ADA . A cubic spline method was used to interpolate the total pressure value between the measuring stations . The isobar contour plots were obtained for engine face Mach numbers\ud varying from 0.17 to 0 .43

Beware the Non-uniqueness of Einstein Rings

We explain how an approximation to the rings formed by the host galaxies in lensed QSOs can be inferred from the QSO data alone. A simple ring image can be made from any lens model by a simple piece of computer graphics: just plot a contour map of the arrival-time surface with closely-spaced contours. We go on to explain that rings should be (a) sensitive to time-delay ratios between different pairs of images, but (b) very insensitive to H_0. We illustrate this for the well-known quads 1115+080 and 1608+656.Comment: To appear in AJ (circa Aug 2001

Scale dependence and collinear subtraction terms for Higgs production in gluon fusion at N3LO

The full, explicit, scale dependence of the inclusive N3LO cross section for single Higgs hadroproduction is obtained by calculating the convolutions of collinear splitting kernels with lower-order partonic cross sections. We provide results for all convolutions of splitting kernels and lower-order partonic cross sections to the order in epsilon needed for the full N3LO computation, as well as their expansions around the soft limit. We also discuss the size of the total scale uncertainty at N3LO that can be anticipated with existing information.Comment: 27 pages, 8 figure, 1 table, 8 ancillary files. v2: added 4 references, changed labelling of contour plot