Warning: ksort() expects parameter 1 to be array, object given in /home/content/p3pnexwpnas02_data03/55/2462655/html/wp-content/plugins/bbpress/includes/core/template-functions.php on line 316

Warning: Cannot modify header information - headers already sent by (output started at /home/content/p3pnexwpnas02_data03/55/2462655/html/wp-content/plugins/bbpress/includes/core/template-functions.php:316) in /home/content/p3pnexwpnas02_data03/55/2462655/html/wp-includes/feed-rss2.php on line 8
Resource Library – InforMath http://informalmathematics.org Fri, 12 Aug 2016 00:29:07 +0000 en-US hourly 1 https://wordpress.org/?v=4.7.4 Five Ways to Integrate: Using Strategies from Contemporary Art http://informalmathematics.org/resource-library/five-ways-to-integrate-using-strategies-from-contemporary-art/ http://informalmathematics.org/resource-library/five-ways-to-integrate-using-strategies-from-contemporary-art/#respond Fri, 16 Oct 2015 18:10:13 +0000 http://informalmathematics.org/?p=3406 Title: Five Ways to Integrate: Using Strategies from Contemporary Art

Author: Julia Marshall

Year: 2010

Journal: Art Education

Volume: 63

Issue: 3

Pages: 13-19

Audience(s): Educators, Artists

Content: Art, Education, Academic Curriculum, Contemporary Art

Creating and evaluating art goes beyond investigating the artistic methods used. Art is intimately connected with other disciplines and through some of the strategies presented by Marshall this connection is brought to the forefront. Art is a vehicle that allows concepts to cut across standard disciplinary boundaries and invites conversation about science, the environment, mathematics, history, and so forth. The five strategies Marshall describes to achieve this goal of integration are depiction, extension/projection, reformatting, mimicry, and metaphor.

One strategy that struck me in particular was the practice of reformatting. Through reformatting, a concept is viewed from another vantage point and then conveyed in a visual format. An example presented by Marshall is charting one’s emotional world as a geographical map. The geographical map within itself presents several questions such as, where is north and west? Are there bodies of water? What is the terrain like on the map? What is the scale and size of the map? These questions could allow students to think as a cartographer, geographer, or historian. Examining one’s emotional world allows students to think like a psychologist or a philosopher. Reformatting challenges the way in which we normally view a particular idea or concept and encourages students to be inquisitive about the world around them and to not be hesitant about viewing it through different lenses and perspectives. The process of reformatting may elicit new and imaginative ideas that are more powerful when intimately connected with art than if the ideas were to stand-alone. The process of art making affords students with the opportunity to fuse their own experiences and learning together.

http://informalmathematics.org/resource-library/five-ways-to-integrate-using-strategies-from-contemporary-art/feed/ 0
Workshops with Paul Tatter http://informalmathematics.org/resource-library/workshops-with-paul-tatter/ http://informalmathematics.org/resource-library/workshops-with-paul-tatter/#respond Fri, 16 Oct 2015 17:39:54 +0000 http://informalmathematics.org/?p=3403 See information on our Paul Tatter workshops: InforMath Workshops June 2-4 2015-1

http://informalmathematics.org/resource-library/workshops-with-paul-tatter/feed/ 0
Figurative mosaics from flexible truchet tiles http://informalmathematics.org/resource-library/figurative-mosaics-from-flexible-truchet-tiles/ http://informalmathematics.org/resource-library/figurative-mosaics-from-flexible-truchet-tiles/#respond Fri, 16 Oct 2015 17:38:27 +0000 http://informalmathematics.org/?p=3401 Title: Figurative mosaics from flexible truchet tiles

Authors: Robert Bosch, Urchin Colley

Year: 2013

Journal: Journal of Mathematics and the Arts

Volume: 7

Issue: 3-4

Pages: 122-135

Audience(s): Researchers, Educators, Mathematicians, Artists

Content: Mathematics, Art, Mosaics

Description: This paper discusses how Truchet tiles can be modified for use in halftoning to create figurative mosaics from greyscale images. In the 18th century, Father Truchet published his mathematical and artistic investigations, ‘Memoire sur les combinaisons,” on the use of square tiles to create aesthetically pleasing designs. A Truchet tile is a square that is divided in half down a diagonal and then one side is colored black. There are four distinct Truchet tiles (alternating halves between black and white, using both diagonals) that can be arranged to create infinitely many different patterns. The authors create flexible Truchet tiles whose relative brightness/darkness can be adjusted by flexing at the midpoint of the diagonal that separates black from white.  Figurative mosaics are then created by assigning brightness values to each of the pixels in the matrix of the desired greyscale target image. The authors extend this idea to create flexible hexagonal tiles, and also change the white/black distribution to create star tiles.

Date Created: 7/29/15

Document DOI or URL: doi:10.1080/17513472.2013.838830

http://informalmathematics.org/resource-library/figurative-mosaics-from-flexible-truchet-tiles/feed/ 0
Developing a mathematical model for bobbin lace http://informalmathematics.org/resource-library/developing-a-mathematical-model-for-bobbin-lace/ http://informalmathematics.org/resource-library/developing-a-mathematical-model-for-bobbin-lace/#respond Fri, 16 Oct 2015 17:37:24 +0000 http://informalmathematics.org/?p=3399 Title: Developing a mathematical model for bobbin lace

Authors: Veronika Irvine, Frank Ruskey

Year: 2014

Journal: Journal of Mathematics and the Arts

Volume: 8

Issue: 3-4

Pages: 95-110

Audience(s): Researchers, Educators, Mathematicians, Artists

Content: Mathematics, Topology, Braid Theory, Lattice Theory, Graph Theory, Art, Lace, Craft

Description: This paper discusses the development of a mathematical model for making bobbin lace, a traditional fiber art for creating lace by hand by braiding together many strings using specific patterns.  The authors give an overview of the craft and its history, then review some relevant areas in mathematics for modeling other kinds of fiber arts, including the topology of textiles and braid theory. They then describe a mathematical model for creating bobbin lace, using graph and lattice theory.  This model, in turn, yields new lace patterns, not found in existing catalogues of traditional bobbin lace patterns.  Finally, the authors present these novel lace patterns to lacemakers to elicit feedback on the aesthetics of the design.  Overall, the arch of the narrative presented in this paper represents an interesting interplay between mathematics and the arts, with a longstanding craft tradition inspiring a mathematical model that, in turn, points to new directions for the craft.

Date Created: 7/29/15

Document DOI or URL: doi:10.1080/17513472.2014.982938

http://informalmathematics.org/resource-library/developing-a-mathematical-model-for-bobbin-lace/feed/ 0
Random simulations for generative art construction – some examples http://informalmathematics.org/resource-library/random-simulations-for-generative-art-construction-some-examples/ http://informalmathematics.org/resource-library/random-simulations-for-generative-art-construction-some-examples/#respond Fri, 16 Oct 2015 17:35:40 +0000 http://informalmathematics.org/?p=3397 Title: Random simulations for generative art construction – some examples

Authors: Carola-Bibiane Schönlieb, Franz Schubert

Year: 2013

Journal: Journal of Mathematics and the Arts

Volume: 7

Issue: 1

Pages: 29-39

Audience(s): Researchers, Educators, Mathematicians, Artists

Content: Mathematics, Simulation, Art

Description: The paper begins by reviewing the use of randomness in the creation of pictorial art.  In particular, it describes the contribution of randomness in the painting of Pollock, Warhol, and Rothko, as they incorporated accidental and unplanned strokes in their works of art.   Then it describes diverse computer-based RNG (Random Number Generators) and how their output can generate images by the random specification of the position, color, and texture of their elements.  The authors illustrate how randomness can be incorporated into “computer supported, algorithm based art production.”

Date Created: 7/29/15

Document DOI or URL: doi:10.1080/17513472.2013.769833

http://informalmathematics.org/resource-library/random-simulations-for-generative-art-construction-some-examples/feed/ 0
Big Angles in the Park: Walking Scale Geometry http://informalmathematics.org/resource-library/big-angles-in-the-park-walking-scale-geometry/ http://informalmathematics.org/resource-library/big-angles-in-the-park-walking-scale-geometry/#respond Thu, 09 Jul 2015 23:15:02 +0000 http://informalmathematics.org/?p=3370 One of the goals of the InforMath project is to create informal mathematics activities that engage the whole body. Yes, it is true that sitting at a desk with pencil and paper doing mathematics involves the whole body, just as lying in bed at night imagining a mathematical scenario does. However, we seek to create opportunities for more overt whole body engagement in doing mathematics, whether it requires walking, dancing, arm waving, jumping , etc.

Ashley with pro and strings

To kick off the work of the Design Lab we left the friendly confines of the Tinkering Studio at the Fleet Science Center and made our way out to the fountain with our big protractors in hand. This activity requires 3 people: one person to hold the protractor, and two more people who each hold an end of the string that forms the angle. The two string holders must remain fixed; we used small cones to mark their locations in an effort to minimize any unintentional migration (see the red cones in the photo below).

Molly with pro and strings

Their primary job is to dole out and retract the string as the protractor moves. The person with the protractor tries to move in such a way that the selected angle formed by the strings remains constant. Each time a location is found that preserves the angle, a cone is set down as a marker (see the yellow cones above).


There are two main parameters that affect the system: 1) the fixed distance between the string holders (ie the distance between the two red cones above), and 2) the angle selected on the protractor. Each team of three adjusted the parameters as they saw fit, or as curiosity dictated, and then tried to find as many points, on both sides of the string holders, as they could. For each trial (ie every time we changed the angle or the distance between the string holders) we scribbled quick notes and observations, and took photos to record the collection of locations. As teams succeeded in finding points, attention began to shift towards the resulting pattern or shape formed by the locations. Was it a peanut, an hour glass, an ellipse, etc?

75 degrees

What makes this mathematical experience so much different than the experience of sitting at a desk with a pencil? Lets consider what is involved in finding a point. By design, this activity requires the cooperation of at least three people, so communication and coordination among the team is critical.

How should the protractor move to maintain the angle?

Who needs to change the tension in their string?

How should the tension be changed: increased or decreased?

Bohdan with pro and strings

To engage in these questions and respond to them requires learning to integrate the perceptual and motor. The string holder feels the tension of the string in their hand, the braid of the string tugging your skin, perhaps an urge to move away from their fixed spot as the tension increases, pulling them. Release string.

Is the angle being maintained? Peer down the string to the protractor, is the string still straight? If it’s not, what needs to be done? Should you change the tension in the string? Should the protractor move? If so, where?

If you’re holding the protractor, how should you move to find a new point? Should you look in the direction you intend to move, or try to maintain a visual of the protractor and strings? Don’t trip over your own feet! Uh oh, you feel the protractor pulling you. Is it coming from the left side or the right? Should you request more string, or move differently?

To further explore what shape is produced by the patterns, we created a small scale, desktop device, PEGI. To learn more about PEGI, click here.

Written by Bohdan Rhodehamel
Contact Bohdan at bohdanr561@yahoo.com

http://informalmathematics.org/resource-library/big-angles-in-the-park-walking-scale-geometry/feed/ 0
Pegi http://informalmathematics.org/resource-library/pegi/ http://informalmathematics.org/resource-library/pegi/#respond Thu, 09 Jul 2015 23:10:34 +0000 http://informalmathematics.org/?p=3366 Pegi is a geometric tool we created to supplement a mathematical activity using large scale protractors. The protractor activity requires three people: one person holds the protractor, set at a fixed angle by two pieces of string; the other two people hold the ends of the string and stand at a fixed distance apart. The challenge is to have the protractor person move in such a way that the angle formed by the strings remains fixed, while the string people must either dole out or retract string to help maintain the angle. Teams of three people investigate how many points they can find, and what shape is formed by the points.

Pegi was created to further explore the shape created by the points, but in a way that dramatically reduces the scale and allows one to work individually, if desired. Pegi contains three components: a slotted bar, two pegs to insert in the slots, and angles of varying measures along with their supplements. All parts are made from acrylic cut on a laser cutter.

Pegi 45

One begins by selecting the distance between the pegs and inserting them in the slots of the bar (this distance is the secant), and then choosing an angle to work with. The angle slides between the two pegs, maintaining contact with both pegs . Sliding the vertex through the pegs creates a collection of points that form the same contours (ie circular arcs) found using the protractor and string.

pegi in lab

Written by Bohdan Rhodehamel
Contact Bohdan at bohdanr561@yahoo.com

http://informalmathematics.org/resource-library/pegi/feed/ 0
Exploring the Circumcenter http://informalmathematics.org/resource-library/exploring-the-circumcenter/ http://informalmathematics.org/resource-library/exploring-the-circumcenter/#respond Tue, 23 Jun 2015 15:16:37 +0000 http://informalmathematics.org/?p=3349 Our first investigation during the Lab in the Fall of 2014 was an exploration of the circumcenter. Given three points, the circumcenter is another point on the same plane that is equidistant to them. For example, given A, B and C:



the circumcenter is located at the point whose distances from A, B, and C are equal to each other. As we moved A, B, or C, the circumcenter will move as well in order to keep equal distances to the three points. To make things easier let us call the circumcenter “circum.”

Trying out motions of the points A, B, and C and noticing where circum goes is a way of exploring how circum responds to these motions. We created stories, such as one in which A, B, C were named after participants in the lab and circum worked as their angel guardian. You can read this story here, as well as a subsequent response written by Circum.

Since the distance between Circum-to-A and Circum-to-B must be equal to each other it turns out that Circum is forced to be on the line perpendicular to the one connecting A and B, passing through the midpoint. All the points on this line are equidistant to A and B:


In addition, the distance Circum-to-C must also be equal to the ones Circum-to-A and Circum-to-B, therefore C must be on a circle centered on Circum:




http://informalmathematics.org/resource-library/exploring-the-circumcenter/feed/ 0
Projective Geometry and Anamorphic Projection http://informalmathematics.org/resource-library/projective-geometry-and-anamorphic-projection/ http://informalmathematics.org/resource-library/projective-geometry-and-anamorphic-projection/#comments Fri, 05 Jun 2015 15:33:39 +0000 http://informalmathematics.org/?p=3309 Anamorphosis has been present in art for centuries; the anamorphic skull in Hans Holbein’s The Ambassadors is a well known example. More recently, fleeting 3D sidewalk art has sprung up across the globe, capturing the imaginations of passersby who can’t help but stop and snap a photo of a friend seemingly teetering on the edge of oblivion or about to be swallowed by a shark.

One method of creating anamorphic images relies on projective geometry, specifically a central projection, to map points from a 3D object to their corresponding locations in the 2D anamorphic projection. The Anamorphic Projection Stand (APS) is a simple tool we created for making small scale, desktop anamorphic projections. The APS consists of a stand, a view finder, and a projection line. The projection line extends from the center of the eye hole in the view finder; the center of the eye hole serves as the center of projection. The projection line, in this case a piece of yarn, creates a physical mapping that extends from the center of projection, through a given point on the 3D object, then back down to the table where the projected point lives. By carefully and strategically mapping points from the 3D object down to the table top one can construct an anamorphic image of the 3D object.

center_vertex_proj point



the pic through the view finder

A few important considerations:

The entire system must remain static, with the exception of the projection line, while creating the projection. That is, the center of projection must remain in the same place for each projection, as well as the 3D object. The 3D object can be moved only if it is returned to its exact same position for the next projection (be sure to the mark points on the base of the object).

Anamorphic images will only appear 3D when viewed precisely from the center of projection (note the boy looking through the view finder above). This doesn’t mean you must look through the eye hole to get the 3D view, just make sure you take note of the height of the center of projection, and the distance from the 3D object to the center of projection.


Written by Bohdan Rhodehamel
Contact Bohdan at bohdanr561@yahoo.com

http://informalmathematics.org/resource-library/projective-geometry-and-anamorphic-projection/feed/ 2
Memories of math: Visitors’ experiences in an exhibition about calculus http://informalmathematics.org/resource-library/memories-of-math-visitors-experiences-in-an-exhibition-about-calculus/ http://informalmathematics.org/resource-library/memories-of-math-visitors-experiences-in-an-exhibition-about-calculus/#comments Thu, 21 May 2015 23:00:51 +0000 http://informalmathematics.org/?p=3280 Title: Memories of math: Visitors’ experiences in an exhibition about calculus

Authors: Eric D. Gyllenhaal

Year: 2006

Journal: Curator

Volume: 49

Issue: 3

Pages: 345-364

Audience(s): Researchers, Educators, Evaluators

Content: Mathematics, Calculus

Settings: Museums

Description: This study examines how visitors’ attitudes towards mathematics and memories of school mathematics shaped their experiences with an interactive calculus exhibition called Handling Calculus.

Date Created: 5/21/15

Document DOI or URL: http://dx.doi.org/10.1111/j.2151-6952.2006.tb00228.x


http://informalmathematics.org/resource-library/memories-of-math-visitors-experiences-in-an-exhibition-about-calculus/feed/ 1