Geometry: New Applications
https://www.maplesoft.com/applications/category.aspx?cid=140
en-us2019 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemFri, 26 Apr 2019 04:32:17 GMTFri, 26 Apr 2019 04:32:17 GMTNew applications in the Geometry categoryhttps://www.maplesoft.com/images/Application_center_hp.jpgGeometry: New Applications
https://www.maplesoft.com/applications/category.aspx?cid=140
Maplet pour creer des forteresses en Etoile
https://www.maplesoft.com/applications/view.aspx?SID=154513&ref=Feed
Cette maplet permet de rajouter sur chaque étoile imbriquée des "pointes" entre deux branches pour former des sortes de forteresses.
Le i eme "rapport1" x le rayon "interne" de la i eme etoile est egale a la distance et l'extremité d'une de ses pointes.
Le i eme "rapport2" x la longueur du coté d'une branche de la i eme etoile est egale à la longueur entre un point de base de la branche et le point de base de la "pointe".
"rapport-distance entre les etoiles" x le rayon "interne" de la i ème etoile est egale au rayon "externe" de la (i+1) ème etoile imbriquée.
"rapport1" et "rapport2" sont des sequences comme pour "angle des branches de l'étoiles".<img src="https://www.maplesoft.com/view.aspx?si=154513/forteresse-etoile.gif" alt="Maplet pour creer des forteresses en Etoile" style="max-width: 25%;" align="left"/>Cette maplet permet de rajouter sur chaque étoile imbriquée des "pointes" entre deux branches pour former des sortes de forteresses.
Le i eme "rapport1" x le rayon "interne" de la i eme etoile est egale a la distance et l'extremité d'une de ses pointes.
Le i eme "rapport2" x la longueur du coté d'une branche de la i eme etoile est egale à la longueur entre un point de base de la branche et le point de base de la "pointe".
"rapport-distance entre les etoiles" x le rayon "interne" de la i ème etoile est egale au rayon "externe" de la (i+1) ème etoile imbriquée.
"rapport1" et "rapport2" sont des sequences comme pour "angle des branches de l'étoiles".https://www.maplesoft.com/applications/view.aspx?SID=154513&ref=FeedSun, 03 Mar 2019 05:00:00 Zxavier cormierxavier cormierMaplet pour créer une Etoile
https://www.maplesoft.com/applications/view.aspx?SID=154511&ref=Feed
Cette Maplet permet de dessiner des étoiles en fonction du rayon de l'étoile,l'angle de ses branches,et le nombre de branches.On peut sauvegarder l'étoile en fichier .gif.C'est une application du théorème d'Al-Kashi.<img src="https://www.maplesoft.com/view.aspx?si=154511/etoile.gif" alt="Maplet pour créer une Etoile" style="max-width: 25%;" align="left"/>Cette Maplet permet de dessiner des étoiles en fonction du rayon de l'étoile,l'angle de ses branches,et le nombre de branches.On peut sauvegarder l'étoile en fichier .gif.C'est une application du théorème d'Al-Kashi.https://www.maplesoft.com/applications/view.aspx?SID=154511&ref=FeedTue, 15 Jan 2019 05:00:00 Zxavier cormierxavier cormierCenter and Radius of Sphere Given Four Points
https://www.maplesoft.com/applications/view.aspx?SID=154492&ref=Feed
This application will derive symbolic expressions that gives the center point (xc, yc, zc) and radius r of a sphere whose surface passes through four known (but symbolic) points (x1, y1), (x2, y2), (x3, y3) and (x4, y4).
<BR><BR>
The solve command is used to rearrange some seemingly simple equations. The resulting equations, however, are large, and would be difficult to derive by hand. This demonstrates Maple's utility in deriving and manipulating large symbolic expressions.<img src="https://www.maplesoft.com/view.aspx?si=154492/centerradius.jpg" alt="Center and Radius of Sphere Given Four Points" style="max-width: 25%;" align="left"/>This application will derive symbolic expressions that gives the center point (xc, yc, zc) and radius r of a sphere whose surface passes through four known (but symbolic) points (x1, y1), (x2, y2), (x3, y3) and (x4, y4).
<BR><BR>
The solve command is used to rearrange some seemingly simple equations. The resulting equations, however, are large, and would be difficult to derive by hand. This demonstrates Maple's utility in deriving and manipulating large symbolic expressions.https://www.maplesoft.com/applications/view.aspx?SID=154492&ref=FeedWed, 03 Oct 2018 04:00:00 ZSamir KhanSamir KhanMidpoint Exploration
https://www.maplesoft.com/applications/view.aspx?SID=154295&ref=Feed
The application explores how the midpoints of the lines connecting two circle form circles themselves.<img src="https://www.maplesoft.com/view.aspx?si=154295/midpoints.PNG" alt="Midpoint Exploration" style="max-width: 25%;" align="left"/>The application explores how the midpoints of the lines connecting two circle form circles themselves.https://www.maplesoft.com/applications/view.aspx?SID=154295&ref=FeedWed, 13 Sep 2017 04:00:00 ZPaul WeisenhornPaul WeisenhornTwo dimensional percolation
https://www.maplesoft.com/applications/view.aspx?SID=154288&ref=Feed
This is a percolation package realized as a functional one. We consider a two-dimensional percolation with square cells and square grid. We use three colors: white - dielectric cell, red - conductor cell. The result of the main program is a a check result giving "Yes" if there is a conductive cluster for a randomly generated grid pattern. The conducting cluster is then painted by blue. We check conduction from the bottom to the top of the grid.<img src="https://www.maplesoft.com/view.aspx?si=154288/percolations1.jpg" alt="Two dimensional percolation" style="max-width: 25%;" align="left"/>This is a percolation package realized as a functional one. We consider a two-dimensional percolation with square cells and square grid. We use three colors: white - dielectric cell, red - conductor cell. The result of the main program is a a check result giving "Yes" if there is a conductive cluster for a randomly generated grid pattern. The conducting cluster is then painted by blue. We check conduction from the bottom to the top of the grid.https://www.maplesoft.com/applications/view.aspx?SID=154288&ref=FeedSun, 16 Jul 2017 04:00:00 ZKyaw Aunghein and Lin Ko KoKyaw Aunghein and Lin Ko KoMomentum with two variable force
https://www.maplesoft.com/applications/view.aspx?SID=154273&ref=Feed
This app shows the calculation of the final velocity of a body after it made contact with a variable force taking as reference the initial velocity, mass and the graph of the variation of F as a function of time. Made with native maple syntax (use of promt) and embedded components.
In Spanish.<img src="https://www.maplesoft.com/view.aspx?si=154273/cmimp.png" alt="Momentum with two variable force" style="max-width: 25%;" align="left"/>This app shows the calculation of the final velocity of a body after it made contact with a variable force taking as reference the initial velocity, mass and the graph of the variation of F as a function of time. Made with native maple syntax (use of promt) and embedded components.
In Spanish.https://www.maplesoft.com/applications/view.aspx?SID=154273&ref=FeedTue, 04 Jul 2017 04:00:00 ZProf. Lenin Araujo CastilloProf. Lenin Araujo CastilloMathematics for Chemistry
https://www.maplesoft.com/applications/view.aspx?SID=154267&ref=Feed
This interactive electronic textbook in the form of Maple worksheets comprises two parts.
<BR><BR>
Part I, mathematics for chemistry, is supposed to cover all mathematics that an instructor of chemistry might hope and expect that his students would learn, understand and be able to apply as a result of sufficient courses typically, but not exclusively, presented in departments of mathematics. Its nine chapters include (0) a summary and illustration of useful Maple commands, (1) arithmetic, algebra and elementary functions, (2) plotting, descriptive geometry, trigonometry, series, complex functions, (3) differential calculus of one variable, (4) integral calculus of one variable, (5) multivariate calculus, (6) linear algebra including matrix, vector, eigenvector, vector calculus, tensor, spreadsheet, (7) differential and integral equations, and (8) probability, distribution, treatment of laboratory data, linear and non-linear regression and optimization.
<BR><BR>
Part II presents mathematical topics typically taught within chemistry courses, including (9) chemical equilibrium, (10) group theory, (11) graph theory, (12a) introduction to quantum mechanics and quantum chemistry, (14) applications of Fourier transforms in chemistry including electron diffraction, x-ray diffraction, microwave spectra, infrared and Raman spectra and nuclear-magnetic-resonance spectra, and (18) dielectric and magnetic properties of chemical matter.
<BR><BR>
Other chapters are in preparation and will be released in due course.
<BR><BR>
Last updated on March 19, 2019<img src="https://www.maplesoft.com/view.aspx?si=154267/molecule.PNG" alt="Mathematics for Chemistry" style="max-width: 25%;" align="left"/>This interactive electronic textbook in the form of Maple worksheets comprises two parts.
<BR><BR>
Part I, mathematics for chemistry, is supposed to cover all mathematics that an instructor of chemistry might hope and expect that his students would learn, understand and be able to apply as a result of sufficient courses typically, but not exclusively, presented in departments of mathematics. Its nine chapters include (0) a summary and illustration of useful Maple commands, (1) arithmetic, algebra and elementary functions, (2) plotting, descriptive geometry, trigonometry, series, complex functions, (3) differential calculus of one variable, (4) integral calculus of one variable, (5) multivariate calculus, (6) linear algebra including matrix, vector, eigenvector, vector calculus, tensor, spreadsheet, (7) differential and integral equations, and (8) probability, distribution, treatment of laboratory data, linear and non-linear regression and optimization.
<BR><BR>
Part II presents mathematical topics typically taught within chemistry courses, including (9) chemical equilibrium, (10) group theory, (11) graph theory, (12a) introduction to quantum mechanics and quantum chemistry, (14) applications of Fourier transforms in chemistry including electron diffraction, x-ray diffraction, microwave spectra, infrared and Raman spectra and nuclear-magnetic-resonance spectra, and (18) dielectric and magnetic properties of chemical matter.
<BR><BR>
Other chapters are in preparation and will be released in due course.
<BR><BR>
Last updated on March 19, 2019https://www.maplesoft.com/applications/view.aspx?SID=154267&ref=FeedTue, 30 May 2017 04:00:00 ZProf. John OgilvieProf. John OgilvieRolling without slipping on Mobius strip
https://www.maplesoft.com/applications/view.aspx?SID=154226&ref=Feed
Consider the classical equation of a Mobius strip in parametric form. By using animation shows how movement can occur on the non-oriented surface. We will choose the route as the closed curve belonging to the surface. The sphere was selected as moving geometric object that visually continuously rolls over the surface of a Mobius strip.<img src="https://www.maplesoft.com/view.aspx?si=154226/mobius_strip_rolling.PNG" alt="Rolling without slipping on Mobius strip" style="max-width: 25%;" align="left"/>Consider the classical equation of a Mobius strip in parametric form. By using animation shows how movement can occur on the non-oriented surface. We will choose the route as the closed curve belonging to the surface. The sphere was selected as moving geometric object that visually continuously rolls over the surface of a Mobius strip.https://www.maplesoft.com/applications/view.aspx?SID=154226&ref=FeedThu, 16 Feb 2017 05:00:00 ZAlexey IvanovAlexey IvanovBodies with fixed volume and minimal surface
https://www.maplesoft.com/applications/view.aspx?SID=154057&ref=Feed
We would like to find r/h when a surface is minimal.
Can you solve more complex problem for others bodies<img src="https://www.maplesoft.com/view.aspx?si=154057/1e22ebea45ed480d944eaae36fe7be0e.gif" alt="Bodies with fixed volume and minimal surface" style="max-width: 25%;" align="left"/>We would like to find r/h when a surface is minimal.
Can you solve more complex problem for others bodieshttps://www.maplesoft.com/applications/view.aspx?SID=154057&ref=FeedMon, 21 Mar 2016 17:44:27 ZProf. Valery OchkovProf. Valery OchkovPerimeter, area and visualization of a plane figure
https://www.maplesoft.com/applications/view.aspx?SID=146470&ref=Feed
<p>The work contains three procedures that allow symbolically to calculate the perimeter and area of any plane figure bounded by <span>non-selfintersecting piecewise smooth curve</span>, and to portray this figure together with its boundary in a suitable design.</p><img src="https://www.maplesoft.com/view.aspx?si=146470/planefigure_thumb.png" alt="Perimeter, area and visualization of a plane figure" style="max-width: 25%;" align="left"/><p>The work contains three procedures that allow symbolically to calculate the perimeter and area of any plane figure bounded by <span>non-selfintersecting piecewise smooth curve</span>, and to portray this figure together with its boundary in a suitable design.</p>https://www.maplesoft.com/applications/view.aspx?SID=146470&ref=FeedTue, 30 Apr 2013 04:00:00 ZDr. Yury ZavarovskyDr. Yury ZavarovskyClassroom Tips and Techniques: Custom and Task Palettes
https://www.maplesoft.com/applications/view.aspx?SID=132914&ref=Feed
New in Maple 16, the Custom palette is a palette added to Maple by the user. It is populated with task templates that are already in the Task Browser Table of Contents. A separate Tasks palette can be populated with task templates created by the "Create Task" option in the Context Menu for any selection in a worksheet. This article sheds light on these new functionalities, and gives an example of a Custom palette developed to capture part of the geom3d package in task templates.<img src="https://www.maplesoft.com/view.aspx?si=132914/thumb.jpg" alt="Classroom Tips and Techniques: Custom and Task Palettes" style="max-width: 25%;" align="left"/>New in Maple 16, the Custom palette is a palette added to Maple by the user. It is populated with task templates that are already in the Task Browser Table of Contents. A separate Tasks palette can be populated with task templates created by the "Create Task" option in the Context Menu for any selection in a worksheet. This article sheds light on these new functionalities, and gives an example of a Custom palette developed to capture part of the geom3d package in task templates.https://www.maplesoft.com/applications/view.aspx?SID=132914&ref=FeedThu, 12 Apr 2012 04:00:00 ZDr. Robert LopezDr. Robert LopezClassroom Tips and Techniques: Caustics for a Plane Curve
https://www.maplesoft.com/applications/view.aspx?SID=131655&ref=Feed
This article shows how to construct and visualize a <i>caustic</i>, the envelope of lines emanating from a fixed point, and reflecting off a plane curve.<img src="https://www.maplesoft.com/view.aspx?si=131655/thumb.jpg" alt="Classroom Tips and Techniques: Caustics for a Plane Curve" style="max-width: 25%;" align="left"/>This article shows how to construct and visualize a <i>caustic</i>, the envelope of lines emanating from a fixed point, and reflecting off a plane curve.https://www.maplesoft.com/applications/view.aspx?SID=131655&ref=FeedMon, 12 Mar 2012 04:00:00 ZDr. Robert LopezDr. Robert LopezClassroom Tips and Techniques: Sliders for Parameter-Dependent Curves
https://www.maplesoft.com/applications/view.aspx?SID=130674&ref=Feed
Methods for building slider-controlled graphs are explored, and used to show the variations in the limaçon. Then, the conchoid of a cubic is explored with the same set of tools.<img src="https://www.maplesoft.com/view.aspx?si=130674/thumb.jpg" alt="Classroom Tips and Techniques: Sliders for Parameter-Dependent Curves" style="max-width: 25%;" align="left"/>Methods for building slider-controlled graphs are explored, and used to show the variations in the limaçon. Then, the conchoid of a cubic is explored with the same set of tools.https://www.maplesoft.com/applications/view.aspx?SID=130674&ref=FeedTue, 14 Feb 2012 05:00:00 ZDr. Robert LopezDr. Robert LopezzoMbi
https://www.maplesoft.com/applications/view.aspx?SID=129642&ref=Feed
<p>Higher Mathematics for external students of biological faculty.<br />Solver-practicum.<br />1st semester.<br />300 problems (15 labs in 20 variants).<br />mw.zip</p>
<p>Before use - Shake! <br />(Click on the button and activate the program and Maplet).<br />Full version in html: <a href="http://webmath.exponenta.ru/zom/index.html">http://webmath.exponenta.ru/zom/index.html</a></p><img src="https://www.maplesoft.com/view.aspx?si=129642/zombie_3.jpg" alt="zoMbi" style="max-width: 25%;" align="left"/><p>Higher Mathematics for external students of biological faculty.<br />Solver-practicum.<br />1st semester.<br />300 problems (15 labs in 20 variants).<br />mw.zip</p>
<p>Before use - Shake! <br />(Click on the button and activate the program and Maplet).<br />Full version in html: <a href="http://webmath.exponenta.ru/zom/index.html">http://webmath.exponenta.ru/zom/index.html</a></p>https://www.maplesoft.com/applications/view.aspx?SID=129642&ref=FeedSun, 15 Jan 2012 05:00:00 ZDr. Valery CyboulkoDr. Valery CyboulkoComputational procedures for weighted projective spaces
https://www.maplesoft.com/applications/view.aspx?SID=127621&ref=Feed
<p>This file provides procedures which are able to produce the toric data associated with a (polarized) wps i.e. fans , polytopes and their equivalences. More originally it provides procedures which are able to detect a weights vector Q starting from either a fan or a polytope: we will call this process the recognition of a (polarized) weighted projective space. Moreover it gives procedures connecting polytopes of a polarized weighted projective space with an associated fan and viceversa.</p><img src="https://www.maplesoft.com/view.aspx?si=127621/fan.jpg" alt="Computational procedures for weighted projective spaces" style="max-width: 25%;" align="left"/><p>This file provides procedures which are able to produce the toric data associated with a (polarized) wps i.e. fans , polytopes and their equivalences. More originally it provides procedures which are able to detect a weights vector Q starting from either a fan or a polytope: we will call this process the recognition of a (polarized) weighted projective space. Moreover it gives procedures connecting polytopes of a polarized weighted projective space with an associated fan and viceversa.</p>https://www.maplesoft.com/applications/view.aspx?SID=127621&ref=FeedThu, 10 Nov 2011 05:00:00 ZProf. Michele RossiProf. Michele RossiWhy I Needed Maple to Make Cream Cheese Frosting
https://www.maplesoft.com/applications/view.aspx?SID=125069&ref=Feed
<p>A recipe for cream cheese frosting I was making called for 8 oz. (about 240 grams) of cream cheese. Unfortunately, I didn't have a kitchen scale, and the product I bought came in a 400 gram tub in the shape of a<strong> truncated cone</strong>, which has a rather cumbersome volume formula. <br />Given the geometry of this tub, how deep into the tub should I scoop to get 240 grams? The mathematics is trickier than you might think but lots of fun! And the final, tasty result is worth the effort!</p><img src="https://www.maplesoft.com/view.aspx?si=125069/philly_thumb.png" alt="Why I Needed Maple to Make Cream Cheese Frosting" style="max-width: 25%;" align="left"/><p>A recipe for cream cheese frosting I was making called for 8 oz. (about 240 grams) of cream cheese. Unfortunately, I didn't have a kitchen scale, and the product I bought came in a 400 gram tub in the shape of a<strong> truncated cone</strong>, which has a rather cumbersome volume formula. <br />Given the geometry of this tub, how deep into the tub should I scoop to get 240 grams? The mathematics is trickier than you might think but lots of fun! And the final, tasty result is worth the effort!</p>https://www.maplesoft.com/applications/view.aspx?SID=125069&ref=FeedTue, 23 Aug 2011 04:00:00 ZDr. Jason SchattmanDr. Jason SchattmanMapler. Practicum. Analytic Geometry.
https://www.maplesoft.com/applications/view.aspx?SID=102180&ref=Feed
<p>Examples. 2 x 30 variants.<br />The main thing - the idea.<br />To activate the solution, press the appropriate button, and then - Enter or !!!</p><img src="https://www.maplesoft.com/view.aspx?si=102180/ag1.jpg" alt="Mapler. Practicum. Analytic Geometry." style="max-width: 25%;" align="left"/><p>Examples. 2 x 30 variants.<br />The main thing - the idea.<br />To activate the solution, press the appropriate button, and then - Enter or !!!</p>https://www.maplesoft.com/applications/view.aspx?SID=102180&ref=FeedThu, 03 Mar 2011 05:00:00 ZDonetsk National UniversityDonetsk National UniversityExotic EIE-course
https://www.maplesoft.com/applications/view.aspx?SID=102076&ref=Feed
<p>Ukraine. <br />Exotic training course for the entrance examination in mathematics.<br /><strong>External independent evaluation</strong> <br />Themes:<br />0101 Goals and rational number <br />0102 Interest. The main problem of interest <br />0103 The simplest geometric shapes on the plane and their properties <br />0201 Degree of natural and integral indicator <br />0202 Monomial and polynomials and operations on them <br />0203 Triangles and their basic properties <br />0301 Algebraic fractions and operations on them <br />0302 Square root. Real numbers <br />0303 Circle and circle, their properties <br />0401 Equations, inequalities and their systems <br />0402 Function and its basic properties <br />0403 Described and inscribed triangles <br />0501 Linear function, linear equations, inequalities and their systems <br />0502 Quadratic function, quadratic equation, inequality and their systems <br />0503 Solving square triangles <br />0601 Rational Equations, Inequalities and their sysytemy <br />0602 Numerical sequence. Arithmetic and geometric progression <br />0603 Solving arbitrary triangles <br />0701 Sine, cosine, tangent and cotangent numeric argument <br />0702 Identical transformation of trigonometric expressions <br />0703 Quadrilateral types and their basic properties <br />0801 Trigonometric and inverse trigonometric functions, their properties <br />0802 Trigonometric equations and inequalities <br />0803 Polygons and their properties <br />0901 The root of n-th degree. Degree of rational parameters <br />0902 The power functions and their properties. Irrational equations, inequalities and their systems <br />0903 Regular polygons and their properties <br />1001 Logarithms. Logarithmic function. Logarithmic equations, inequalities and their systems <br />1002 Exponential function. Indicator of equations, inequalities and their systems <br />1003 Direct and planes in space <br />1101 Derivative and its geometric and mechanical content <br />1102 Derivatives and its application <br />1103 Polyhedron. Prisms and pyramids. Regular polyhedron <br />1201 Initial and definite integral <br />1202 Application of certain integral <br />1203 Body rotation <br />1301 Compounds. Binomial theorem <br />1302 General methods for solving equations, inequalities and their systems <br />1303 Coordinates in the plane and in space <br />1401 The origins of probability theory <br />1402 Beginnings of Mathematical Statistics <br />1403 Vectors in the plane and in space <br /><strong>Maple </strong>version<br /><strong>Html-interactive</strong> version</p><img src="https://www.maplesoft.com/view.aspx?si=102076/ell.jpg" alt="Exotic EIE-course" style="max-width: 25%;" align="left"/><p>Ukraine. <br />Exotic training course for the entrance examination in mathematics.<br /><strong>External independent evaluation</strong> <br />Themes:<br />0101 Goals and rational number <br />0102 Interest. The main problem of interest <br />0103 The simplest geometric shapes on the plane and their properties <br />0201 Degree of natural and integral indicator <br />0202 Monomial and polynomials and operations on them <br />0203 Triangles and their basic properties <br />0301 Algebraic fractions and operations on them <br />0302 Square root. Real numbers <br />0303 Circle and circle, their properties <br />0401 Equations, inequalities and their systems <br />0402 Function and its basic properties <br />0403 Described and inscribed triangles <br />0501 Linear function, linear equations, inequalities and their systems <br />0502 Quadratic function, quadratic equation, inequality and their systems <br />0503 Solving square triangles <br />0601 Rational Equations, Inequalities and their sysytemy <br />0602 Numerical sequence. Arithmetic and geometric progression <br />0603 Solving arbitrary triangles <br />0701 Sine, cosine, tangent and cotangent numeric argument <br />0702 Identical transformation of trigonometric expressions <br />0703 Quadrilateral types and their basic properties <br />0801 Trigonometric and inverse trigonometric functions, their properties <br />0802 Trigonometric equations and inequalities <br />0803 Polygons and their properties <br />0901 The root of n-th degree. Degree of rational parameters <br />0902 The power functions and their properties. Irrational equations, inequalities and their systems <br />0903 Regular polygons and their properties <br />1001 Logarithms. Logarithmic function. Logarithmic equations, inequalities and their systems <br />1002 Exponential function. Indicator of equations, inequalities and their systems <br />1003 Direct and planes in space <br />1101 Derivative and its geometric and mechanical content <br />1102 Derivatives and its application <br />1103 Polyhedron. Prisms and pyramids. Regular polyhedron <br />1201 Initial and definite integral <br />1202 Application of certain integral <br />1203 Body rotation <br />1301 Compounds. Binomial theorem <br />1302 General methods for solving equations, inequalities and their systems <br />1303 Coordinates in the plane and in space <br />1401 The origins of probability theory <br />1402 Beginnings of Mathematical Statistics <br />1403 Vectors in the plane and in space <br /><strong>Maple </strong>version<br /><strong>Html-interactive</strong> version</p>https://www.maplesoft.com/applications/view.aspx?SID=102076&ref=FeedMon, 28 Feb 2011 05:00:00 ZTIMOTIMOTerminator circle with animation
https://www.maplesoft.com/applications/view.aspx?SID=100509&ref=Feed
<p>The idea of writing this article came to me on the 25th of June 2003 when I was listening to Cairo radio announcing that Maghrib prayer is due in Cairo city while I was sitting in my home town at 400 miles North East of Cairo. What is interesting is that at exactly the same time a next door mosque, in my home town, was also calling for the Maghrib prayer. This makes me wonder : how could it be that sunset is simultaneous at two locations separated by a distance of 400 miles from each other and at different Latitudes & Longitudes. As a reminder Maghrib prayer time occurs everywhere at sunset. <br />In what follows we explore this issue and try to prove or disprove the simultaneity of sunset at two different locations. In so doing we are led to some interesting conclusions and as a bonus we got ourselves an animation of the Terminator circle on the surface of the globe. <br />Aside from its modest value and its originality ( I am not aware of anything similar to it ) this article is a good exercise in Maple programming. <br />May this article be a stimulus for some readers to get interested in Astronomy which is a science as ancient as the early human civilizations. <br /><br /></p><img src="https://www.maplesoft.com/view.aspx?si=100509/thumb.jpg" alt="Terminator circle with animation" style="max-width: 25%;" align="left"/><p>The idea of writing this article came to me on the 25th of June 2003 when I was listening to Cairo radio announcing that Maghrib prayer is due in Cairo city while I was sitting in my home town at 400 miles North East of Cairo. What is interesting is that at exactly the same time a next door mosque, in my home town, was also calling for the Maghrib prayer. This makes me wonder : how could it be that sunset is simultaneous at two locations separated by a distance of 400 miles from each other and at different Latitudes & Longitudes. As a reminder Maghrib prayer time occurs everywhere at sunset. <br />In what follows we explore this issue and try to prove or disprove the simultaneity of sunset at two different locations. In so doing we are led to some interesting conclusions and as a bonus we got ourselves an animation of the Terminator circle on the surface of the globe. <br />Aside from its modest value and its originality ( I am not aware of anything similar to it ) this article is a good exercise in Maple programming. <br />May this article be a stimulus for some readers to get interested in Astronomy which is a science as ancient as the early human civilizations. <br /><br /></p>https://www.maplesoft.com/applications/view.aspx?SID=100509&ref=FeedTue, 28 Dec 2010 05:00:00 ZDr. Ahmed BaroudyDr. Ahmed BaroudyCoon's Patch Examples
https://www.maplesoft.com/applications/view.aspx?SID=100369&ref=Feed
<p><span id="ctl00_ctl00_basicMain_main_viewer_body" class="mainBody document">
<p>Coon's patch defines a patch from 4 curves forming a closed chain. This application contains 4-examples to Coon's patch. Boundary curves in the examples are constructed by parametric cubic curves (in Bezier and Hermite form). First example is in 3D and comparable to parametric bicubic surface. Rest of examples are in 2D (abstract surface) which can be described shortly as:</p>
<ul>
<li>2D Example#1: 4 circular-arc like curves are combined by Coon's patch to form a circular-like region</li>
<li>2D Example#2: vertices of a square are assigned to rotating tangents</li>
<li>2D Example#3: boundaries corresponding to nozzle like geometry</li>
</ul>
</span></p><img src="https://www.maplesoft.com/view.aspx?si=100369/maple_icon.jpg" alt="Coon's Patch Examples" style="max-width: 25%;" align="left"/><p><span id="ctl00_ctl00_basicMain_main_viewer_body" class="mainBody document">
<p>Coon's patch defines a patch from 4 curves forming a closed chain. This application contains 4-examples to Coon's patch. Boundary curves in the examples are constructed by parametric cubic curves (in Bezier and Hermite form). First example is in 3D and comparable to parametric bicubic surface. Rest of examples are in 2D (abstract surface) which can be described shortly as:</p>
<ul>
<li>2D Example#1: 4 circular-arc like curves are combined by Coon's patch to form a circular-like region</li>
<li>2D Example#2: vertices of a square are assigned to rotating tangents</li>
<li>2D Example#3: boundaries corresponding to nozzle like geometry</li>
</ul>
</span></p>https://www.maplesoft.com/applications/view.aspx?SID=100369&ref=FeedTue, 21 Dec 2010 05:00:00 ZHakan TiftikciHakan Tiftikci