These are articles posted by The Fold editor jason.ku (who may or may not be the author; see byline for authorship). The Fold is the online magazine for members of OrigamiUSA. New articles are posted continuously over the two month period of each issue. To contribute to The Fold or for other questions, please see our FAQ.

### Diagrams: Flying Santa

by Sy Chen
Diagrams for a paper airplane by Sy Chen resembling Santa Claus.

### Math: Trisection Construction Proof

by Bennett Arnstein
Proof of Lewis Simon's construction for the trisection of the side of a square or the short side of a rectangle.

### Diagrams: Beaver

Diagrams for a beaver, the mascot of MIT, designed by Brian Chan.

### Diagrams: Stand-up Sailboat Card

by Sy Chen
Diagrams for a pop-up standing version of the traditional origami sailboat by Sy Chen.

### Diagrams: Salmon

by Joel Stern
Diagrams for a salmon designed by Joel Stern for a consulting project.

### Diagrams: $$60^{\circ}$$ Star Module

by David Petty. Diagrammed by Nick Robinson
Diagrams for a $$60^\circ$$ Modular Star by David Petty

### Diagrams: Heart Variation

Diagrams for a heart variation based on a model by Edwin Corrie.

### Convention: Thoughts from PCOC 2011

by Robert Orndorff
A compilation of quotes from attendees of the 2011 Pacific Coast Origami Convention in Bellevue, Washington.

### Diagrams: Burr Puzzle

Diagrams for a classic puzzle, typically made of wood.

### Diagrams: Bracelet

by Robert Orndorff
Diagrams for a bracelet that appears woven.

### Math: The Golden Ratio in Origami

by Arnold Tubis, John Andrisan, and Christopher Pooley
Paper folding exercises involving the golden section of a line, the golden rectangle, and the golden triangle provide interesting geometry-teaching supplements.

### Crease Pattern: Trees

Crease patterns and video for two modular tree units with variations.

### Report: Christmas, Hawaii Style

by Ashley Nishihara
Thinking about some special decoration for the upcoming holidays? Here is a great project created by Kindergarten students at Oahu’s Le Jardin Academy that would work great for any special celebration.

### Convention: OrigaMIT

Report from the First OrigaMIT Convention hosted by OrigaMIT which took place at the Massachusetts Institute of Technology on November 19th, 2011.

### Convention: EBOC

by Christopher Itoh
Report from the First East Bay Origami Convention hosted by CAL Origami which took place at the University of California Berkeley on November 19th, 2011.

### Editorial: Copyright In the Origami World

In a series of articles, we try to clarify the application of copyright law to origami. In this first article we conclude that origami is an art form, hence covered by copyright law.

### Diagrams: Turkey

Diagrams for a turkey, symbolic of the American holiday of Thanksgiving.

### Editorial: A Year in Review

A look back on the first year of The Fold!