Passing Patterns Compendium
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IJA Enewsletter Editor Don Lewis (Email: [email protected]) Renew At
THE INTERNATIONAL JUGGLERS’ ASSOCIATION June 2015 IJA eNewsletter editor Don Lewis (email: [email protected]) Renew at http://www.juggle.org/renew IJA eNewsletter IJA Festival July 20 - 26, 2015 Quebec City, QC, Canada Register online soon! Discounts on Contents: Event Packages end June 30! IJA Pre-Reg Deadline Only Days Away Full info is on our website: Chairman’s Message www.juggle.org/festival IJA Election - New, Vote Online! Candidates’ Statements After June 30th, Stage Championships Finalists Register in Person at the Festival IJA Festival Information Online IJA Fest’s Special Guests See fest details starting on page 4, Festival Checklist where the Championships Finalists are listed! WJD shirts, YJA badges in IJA Store What’s New at eJuggle Coming Soon to eJuggle... Juggling Festivals Juggling Festivals: Lincolnshire, UK Eugene, OR Quebec City, Quebec, Canada (IJA) Collinée en Bretagne, France Bruneck, South Tyrol, Italy (EJC) Montpeyroux, France Garsington, Oxfordshire, UK Cleveland, OH Portland, OR Kansas City, MO Philadelphia, PA Fukushima, Japan Ottumwa, IA WWW.JUGGLE.ORG Page 1 THE INTERNATIONAL JUGGLERS’ ASSOCIATION June 2015 Chairman’s Message, by Nathan Wakefield - Obstacle course: $500 - Waterballoon slip and slide: $200 - Drinks and flair bartender: $200 - Onsite massage therapist: $1,000 - Cardboard box castle building contest: $60 - Pinata filled with juggling props: $250 - Tye Dye $60 "To render assistance to fellow jugglers." - Food. $1,630 and the remainder of any additional funds. Special thanks to donor Unna Med and all those who Less than one month until the 2015 IJA Festival in contributed towards this fund of awesomeness! Quebec City! It's been a long road of hard work for our festival team If logistics is an issue for you, we have rideboards and officers, but everything is in place for this year's available on both our festival forum and on Facebook. -
What's Happening at the IJA ?
THE INTERNATIONAL JUGGLERS’ ASSOCIATION October 2007 IJA e-newsletter editor: Don Lewis (email: [email protected]) Renew at http://www.juggle.org/renew What’s Happening at the IJA ? In This Issue: 2008 Lexington IJA Festival Help Wanted Have You Moved, or Gotten a New Email Address? Treasury Remember, the only way to ensure that you don't miss a World Juggling Day single issue of JUGGLE magazine is to give us your new Marketing the IJA address. The USPS will generally not forward JUGGLE Joggling Record magazine. Insurance To update your mailing address, email, or phone, please Regional Festivals send email to [email protected] or call TurboFest - Quebec City 415-596-3307 or write to: IJA, PO Box 7307, Austin, TX 78713-7307 USA. World Circus Year 2008 IJA Festival, Lexington, Kentucky The Hyatt is connected to the convention center. The convention center has a food court and shops and they are Lexington Notes by Richard Kennison open on a daily basis. There is a vibrant downtown area right Everyone, around the convention center. I just spent two days in Lexington, KY. I am very thrilled to tell The convention center contact person, the hotel contact person you that I think it is a wonderful site. I will not go into long and the theatre contact person are all professional and excited details here but: that we are coming. Bond Jacobs—the visitors bureau contact You can park your car (for free if you stay the the Hyatt) and person is an asset and will go the extra mile for us. -
The Coriolis Force and the Rattleback
The Coriolis Force and the Rattleback Frederick David Tombe, Belfast, Northern Ireland, United Kingdom, [email protected] 17th December 2010 Abstract. The rattleback (Celtic Stone) is the most mysterious phenomenon in classical mechanics. It reverses its angular momentum by inducing a Coriolis pressure from the dense background sea of rotating electron-positron dipoles which is the medium for the propagation of light. [1] Magnets and Rattlebacks I. Magnets and rattlebacks share in common the fact that they involve a mutual alignment of the spin moments of their constituent atoms and molecules. They differ however in that rattlebacks involve a rotation on the large scale in order to bring this alignment about. In magnetic materials, the induced spin alignment results in a linear force, whereas in rattlebacks, the induced spin alignment results in a reversal torque which opposes the initial rotation. Another important difference is that rattlebacks are generally made of materials which are not as dense as magnetic materials. [2] Gravity and Friction II. Gravity acts vertically downwards and so the reversal torque in a rattleback cannot be sourced in gravity. Sliding friction is involved in that it dissipates the entire motion, but sliding friction by its nature is not something that could cause a reversal torque. Static friction is necessary in order to enable the rocking stage of the rattleback’s cycle. Without static friction, a rattleback will not work. However, static friction by its nature is not something that could actually go as far as to cause a reversal torque. 1 Forging a Torque by Mathematical Manipulation III. -
Juggling – 15013000/15013100 HOPE PE 1506320G
Course: Juggling – 15013000/15013100 HOPE PE 1506320G Credit for Graduation: 1.0 Credit – HOPE elective credit / Physical Education Credit Pre-requisite: Desire to explore and develop the skill set needed for juggling. Description: Expectations: The purpose of this course is to provide students Students will be expected to embrace the many with the knowledge, skills, and values they need to challenges involved in developing a unique skill become healthy and physically active for a lifetime. set. In addition to developing skills with assorted This course addresses both the health and skill- props, students will be expected to learn about related components of physical fitness which are the greater juggling community, learning theory, critical for students' success. The SAIL juggling program exists to promote self-expression and to prop building, routine development etc. encourage creativity. Students will have the Participation and movement are key components opportunity to form new friendships and develop for being successful in this course. skills that will last a lifetime. In addition to conventional ball, club and ring juggling, students will be exposed to a plethora of props likely including but not limited to unicycle, cigar box manipulation, rolla bolla, contact juggling, card throwing, throw top, yo-yo, diabolo, hacky sack, passing, kendama and ball spinning. Resources/Materials: Assorted jugging equipment Website: https://www.leonschools.net/Domain/2453 Course: Juggling 15013000 / 15013000 HOPE PE: #15063200 Credit for Graduation: 1.0 Credit - HOPE elective credit Pre-requisite: Description: Expectations: HOPE PE: The purpose of this course is to develop and enhance healthy behaviors that influence lifestyle choices and student health and fitness. -
The Alaska Eskimos
THEALASKA ESKIMOS A SELECTED, AN NOTATED BIBLIOGRAPHY Arthur E. Hippler and John R. Wood Institute of Social and Economic Research University of Alaska Standard Book Number: 0-88353-022-8 Library of Congress Catalog Card Number: 77-620070 Published by Institute of Social and Economic Research University of Alaska Fairbanks, Alaska 99701 1977 Printed in the United States of America PREFACE This Report is one in a series of selected, annotated bibliographies on Alaska Native groups that is being published by the Institute of Social and Economic Research. It comprises annotated references on Eskimos in Alaska. A forthcoming bibliography in this series will collect and evaluate the existing literature on Southeast Alaska Tlingit and Haida groups. ISER bibliographies are compiled and written by institute members who specialize in ethnographic and social research. They are designed both to support current work at the institute and to provide research tools for others interested in Alaska ethnography. Although not exhaustive, these bibliographies indicate the best references on Alaska Native groups and describe the general nature of the works. Lee Gorsuch Director, ISER December 1977 ACKNOWLEDGEMENTS A number of people are always involved in such an undertaking as this. Particularly, we wish to thank Carol Berg, Librarian at the Elmer E. Rasmussen Library, University of Alaska, whose assistance was invaluable in obtaining through interlibrary loans, many of the articles and books annotated in this bibliography. Peggy Raybeck and Ronald Crowe had general responsibility for editing and preparing the manuscript for publication, with editorial and production assistance provided by Susan Woods and Kandy Crowe. The cover photograph was taken from the Henry Boos Collection, Archives and Manuscripts, Elmer E. -
IJA Enewsletter Editor Don Lewis (Email: [email protected]) Renew at Http
THE INTERNATIONAL JUGGLERS! ASSOCIATION August 2011 IJA eNewsletter editor Don Lewis (email: [email protected]) Renew at http:www.juggle.org/renew IJA eNewsletter IJA Stage Championships Results, July 21 - 22, 2011 Individuals Contents: 1st: Tony Pezzo 2011 Championships Results 2nd: Kitamura Shintarou IJA Busking Competition 3rd: Tomohiro Kobayashi Joggling Correction Video Download Help Teams Club Tricks Handouts 1st: Showy Motion - Stefan Brancel and Ben Hestness Magazine Process 2nd: Smirk - Reid Belstock and Warren Hammond Will Murray in Afghanistan 3rd: The Jugheads - Rory Bade, Michael Barreto, Alex Behr, Daniel Burke, Sean YEP Report Carney, Tom Gaasedelen, Joe Gould, Danny Gratzer, Conor Hussey, Reid Johnson, Griffin Kelley, Jonny Langholz, Jack Levy, Chris Lovdal, Mara Moettus, Chris Olson, Montreal Circus Festival Evan Peter, Scott Schultz, Joey Spicola, and Brenden Ying Stagecraft Corner Regional Festivals Juniors Best Catches IJA Games Winners 1st: David Ferman 2nd: Jack Denger FLIC Auditions 3rd: Patrick Fraser Busking Competition 1st: Cate Flaherty 2nd: Kevin Axtell 3rd: Gypsy Geoff See all the results online at: http://www.juggle.org/history/champs/champs2011.php Juggling Festivals: Davidson, NC S.Gloucestershire, UK Kansas City, MO Portland, OR Philadelphia, PA Asheville, NC St. Louis, MO Baden, PA Waidhofen, Austria North Goa, India Bali, Indonesia photo: Martin Frost WWW.JUGGLE.ORG Page 1 THE INTERNATIONAL JUGGLERS! ASSOCIATION August 2011 IJA Busking Competition, Most of us know there are a lot of great buskers amongst IJA members, but most of us don!t get to see their street acts in the wild. Stage shows and street shows are totally different dynamics, and different again from the zaniness that occurs on the Renegade stage. -
What's Happening at the IJA ?
THE INTERNATIONAL JUGGLERS’ ASSOCIATION January 2008 IJA eNewsletter editor: Don Lewis (email: [email protected]) Renew at http://www.juggle.org/renew What’s Happening at the IJA ? Happy New Year from the IJA Board In This Issue: Championship Rules Regional Festivals Host a Festival Video Party Green Club Tips Atlanta Groundhog Day Archive News Never Too Old... Austin JuggleFest XV Forum Changes World Juggling Day RIT Rochester Finance News IJA Insurance JAQ Montreal Video Projects Feedback & Opinion IJA Festval 2008 - Lexington Kentucky The 61st Annual IJA Juggling Festival will be held July 14-20, 2008, in Lexington, Kentucky, in the large, well-lit, climate-controlled juggling space of the Lexington Convention Center (with free wireless Internet). Specially invited guests include: * Performers from Ecole de Cirque de Quebec (Quebec Circus School) * Niels Duinker * Casey Boehmer * More to come... * * Youth Group Discount: Event Packages are available through June 1 for only $79 each to groups of 10 or more youths attending with a chaperone and registered together. For details, contact festival director Richard Kennison at [email protected]. Early Bird: Register by April 1 and pay only $159 for an Adult Event Package or $89 for a Youth-Senior Event Package. (Youth-Senior packages are for ages 11-17 and 65+.) Advanced: Register April 2 through June 15 and pay $189/Adult or $109/Youth-Senior. Last Minute: Register after June 15 and pay $229/Adult or $139/Youth-Senior. Full fest information (including online registration, hotel info, a room/ride-sharing forum and more) is available at: http://www.juggle.org/festival WWW.JUGGLE.ORG Page 1 THE INTERNATIONAL JUGGLERS’ ASSOCIATION January 2008 Throw a Juggling Video Party! by Steve Rahn Missing in Action? For those of you who have received your DVD of the IJA We have had reports of padded DVD mailers damaged in the 2007 Festival and have a group of juggling friends or mail and arriving without their contents. -
Rattlebacks for the Rest of Us Simon Jonesa) Department of Mechanical Engineering, Rose-Hulman Institute of Technology, Terre Haute, Indiana 47803 Hugh E
Rattlebacks for the rest of us Simon Jonesa) Department of Mechanical Engineering, Rose-Hulman Institute of Technology, Terre Haute, Indiana 47803 Hugh E. M. Hunt Engineering Dynamics and Vibration, University of Cambridge, Cambridge CB21PZ, United Kingdom (Received 21 November 2018; accepted 18 June 2019) Rattlebacks are semi-ellipsoidal tops that have a preferred direction of spin (i.e., a spin-bias). If spun in one direction, the rattleback will exhibit seemingly stable rotary motion. If spun in the other direction, the rattleback will being to wobble and subsequently reverse its spin direction. This behavior is often counter-intuitive for physics and engineering students when they first encounter a rattleback, because it appears to oppose the laws of conservation of momenta, thus this simple toy can be a motivator for further study. This paper develops an accurate dynamic model of a rattleback, in a manner accessible to undergraduate physics and engineering students, using concepts from introductory dynamics, calculus, and numerical methods classes. Starting with a simpler, 2D planar rocking semi-ellipse example, we discuss all necessary steps in detail, including computing the mass moment of inertia tensor, choice of reference frame, conservation of momenta equations, application of kinematic constraints, and accounting for slip via a Coulomb friction model. Basic numerical techniques like numerical derivatives and time-stepping algorithms are employed to predict the temporal response of the system. We also present a simple and intuitive explanation for the mechanism causing the spin-bias of the rattleback. It requires no equations and only a basic understanding of particle dynamics, and thus can be used to explain the intriguing rattleback behavior to students at any level of expertise. -
An Interactive Design System of Free-Formed Bamboo-Copters
Pacific Graphics 2016 Volume 35 (2016), Number 7 E. Grinspun, B. Bickel, and Y. Dobashi (Guest Editors) An Interactive Design System of Free-Formed Bamboo-Copters Morihiro Nakamura, Yuki Koyama, Daisuke Sakamoto and Takeo Igarashi The University of Tokyo Figure 1: Using our interactive design system, users can design free-formed, even asymmetric, bamboo-copters that can be easily fabricated and can successfully fly. Abstract We present an interactive design system for designing free-formed bamboo-copters, where novices can easily design free- formed, even asymmetric bamboo-copters that successfully fly. The designed bamboo-copters can be fabricated using digital fabrication equipment, such as a laser cutter. Our system provides two useful functions for facilitating this design activity. First, it visualizes a simulated flight trajectory of the current bamboo-copter design, which is updated in real time during the user’s editing. Second, it provides an optimization function that automatically tweaks the current bamboo-copter design such that the spin quality—how stably it spins—and the flight quality—how high and long it flies—are enhanced. To enable these functions, we present non-trivial extensions over existing techniques for designing free-formed model airplanes [UKSI14], including a wing discretization method tailored to free-formed bamboo-copters and an optimization scheme for achieving stable bamboo- copters considering both spin and flight qualities. Categories and Subject Descriptors (according to ACM CCS): I.3.6 [Computer Graphics]: Methodology and Techniques— Interaction techniques. I.3.8 [Computer Graphics]: Applications—. I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling—Physically based modeling. 1. -
What's Happening at the IJA ?
THE INTERNATIONAL JUGGLERS! ASSOCIATION February 2009 IJA eNewsletter editor: Don Lewis (email: [email protected]) Renew at http://www.juggle.org/renew What’s Happening at the IJA ? In This Issue: Board Profile More Basic Club Tricks Festivals: Festival 2009 Video Tall Tales, Please Urbana Champaign, IL Festival News Get Involved ! Brooklyn, NY Festival Logo Contest Plus Grand Cabaret Rochester, NY Festival Volunteers Regional Festivals Montreal, QC Nominations College Park, MD Full 2009 IJA festival details are now available on the website, and online registration is open. All fest info is available at: http://www.juggle.org/festival New IJA Festival Promo Video Check out the new video on the IJA home page! This new video montage does a great job of capturing the excitement of an IJA festival. Well, you know that the festival is going to be great, but perhaps there are jugglers out there that still don!t know what they are missing. Send all your juggling friends a link to the video, and encourage them to pass it on to all their friends! Let!s get the viral marketing machine cranked up! With the economy being kicked around like a deflated stage ball, we need to make sure every juggler knows that there a great low cost alternative to all those expensive tennis holidays, hockey and basketball camps, destination resorts, and exclusive guided adventures. Come juggle with us! click here -»» http://www.juggle.org The Place to Be! by the IJA Festival Video Committee Rate and Comment! And don't forget to subscribe to the"Official!IJA YouTube Channel! As most of us know,"the"place to be during the third week"of http://www.youtube.com/user/ijavideo July is"always the IJA Annual Convention.""This year we have a series of fantastic new videos to get us ready for the Most of all,Register"for the IJA 2009 Festival Festival! http://www.juggle.org/festival Every week a different YouTube juggler creates a video It's!the"place to be! offering their own unique take on the IJA festival. -
Diabolo Orientation Stabilization by Learning Predictive Model for Unstable Unknown-Dynamics Juggling Manipulation
2020 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) October 25-29, 2020, Las Vegas, NV, USA (Virtual) Diabolo Orientation Stabilization by Learning Predictive Model for Unstable Unknown-Dynamics Juggling Manipulation Takayuki Murooka, Kei Okada and Masayuki Inaba Abstract— Juggling manipulation is one of difficult manipu- lation to acquire since some of such manipulation is unstable and also its physical model is unknown due to the complex non- prehensile manipulation. To acquire these unstable unknown- dynamics juggling manipulation, we propose a method for designing the predictive model of manipulation with a deep neural network, and a real-time optimal control law with some robustness and adaptability using backpropagation of the network. In this study, we apply this method to diabolo orientation stabilization, which is one of unstable unknown- dynamics juggling manipulation. We verify the effectiveness (a) Diabolo tools. A red diabolo top of the proposed method by comparing with basic controllers and two white sticks connected with a rope. such as P Controller or PID Controller, and also check the (b) Diabolo orientation adaptability of the proposed controller by some experiments stabilization by PR2. with a real life-sized humanoid robot. Fig. 1. Diabolo orientation stabilization. I. INTRODUCTION A. Related Works 1) Robot as Entertainment: Entertainment robots have Robots are expected to behave and manipulate like human, been widely researched and developed to enrich human life and in order to realize that, researchers have been tackling [1], [2], [3], and also entertainment robots have significant a wide range of motion planning or control with various effects as therapy for elderly people or children with autism robots. -
Ron Graham Celebration: a Magical
2/4/00 Ron Graham Celebration: A Magical Day Friday, December 10, 1999 -- a day that will be remembered, at least by many at AT&T Labs Research, as Ron Graham Day. It was on that day that the Florham Park workplace world as most know it came to a halt and an extraordinary blending of good-natured jesting through testimonials, stimulating academic presentations, fellowship and masterful juggling created a day of ordered pandemonium – and memories. Some 200 colleagues, including pre-eminent mathematicians from around the country, family and friends shared what emcee-for-the-day Rob Calderbank heralded as “a celebration of the life and work of Ron Graham.” Effective December 31, 1999, Ron formally retired from AT&T after 37 years of distinguished service. To mark Ron’s retirement and his contributions to AT&T and to mathematics, the Shannon Lab hosted a full day of events in his honor. The guest speakers included Persi Diaconis, Ron’s collaborator on a book on math and magic, who spoke on The Magic of Ron Graham, while confounding the audience with card tricks that seemed to affirm the relationship between math and magic. S. “Muthu” Muthukrishnan spoke on another recurring theme in Ron’s life: airborne matters, as he addressed scheduling algorithms and Ron’s work on the ABM Defense System and subsequently, related task sequencing projects. And Andy Granville flew up from the University of Georgia to review a variety of what Ron would term “delightful” math problems Andy had solved that he “didn’t know were Ron’s.” A host of colleagues shared fond memories and feelings for a man they consider a mentor, a friend and a tough act to follow.