Cansail 3-6 Technical Package DRAFT 2013
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Dynamics and Stability of Resonant Rings in Galaxies B
Astronomy Reports, Vol. 44, No. 5, 2000, pp. 279–285. Translated from Astronomicheskiœ Zhurnal, Vol. 77, No. 5, 2000, pp. 323–330. Original Russian Text Copyright © 2000 by Kondrat’ev. Dynamics and Stability of Resonant Rings in Galaxies B. P. Kondrat’ev Udmurt State University, Krasnoarmeœskaya ul. 71, Izhevsk, 426034 Russia Received December 24, 1998 Abstract—We have developed a model for a spheroidal, ring-shaped galaxy. The stars move in a ring with an elliptical cross section at the 1 : 1 frequency resonance. The shape of the cross section of the equilibrium ring depends on the oblateness of the galaxy itself, so that the ellipse of the ring cross section is radially extended when the oblateness of the galaxy is small. If the oblateness of galaxy exceeds some critical value, the ellipse cross section is extended along the Ox3 axis. The shape of the ring cross section is circular for a galaxy with critical eccentricity. The stability of the ring over a wide range of perturbations is studied. A fundamental bicu- bic dispersion equation for the frequencies of small oscillations of a perturbed ring is derived. Application of the model to the ring galaxy NGC 7020 shows that its ring cross section should be approximately circular. Anal- ysis of the dispersion equation demonstrates that stellar orbits in the arm are unstable (but the instability incre- ment is small). We conclude that stars in the ring of this galaxy should drift from the 1 : 1 resonance, and the ring itself should evolve. © 2000 MAIK “Nauka/Interperiodica”. 1. INTRODUCTION appearance of various commensurability ratios. -
February-March 2017
FROM THE QUARTERDECK FEBRUARY / MARCH 2017 THE COURSE IS SET... The process of modernizing our Jackson Creek waterfront is underway. Two committees have been formed: one We’ve been busy. Yes, really busy. to make financing recommendations for the East Dock While the winter months for most are replacement, and a second to supervise the eventual a break in sailing activities, Board construction. Steve Quiriconi and Ted Bennett are the members and many other volunteers chairs of these two committees. At its January 2017 have been planning for the season meeting, the Board approved a budget of up to $5,000 ahead. Here is an update on what’s for engineering and permitting. Even if construction in the works: does not move forward this year, the engineering and permitting work will be useful in the future. First and foremost, I am happy to announce that in late December the Long-Range Planning Committee and the Meanwhile, dredging of Jackson Creek is underway and Flag Officers concluded the search process and hired expected to conclude in several months, depending on a new General Manager. Brian Ankrom, who resides in the weather. This much-needed maintenance is intended White Stone with his wife and children, arrived on the to increase the depth and width of the channel, providing job on January 2nd ready to dive in and become part peace of mind for our larger boat owners and eliminating of FBYC. His educational and professional background in excuses for frequent bottom bumps! Various Jackson recreation and project management bring valuable skills Creek bulkhead repairs, most notably near Fannie’s to the tasks ahead. -
Tech Book 2001 Larger Type
Technicalities 2000 Published & Copyright © 2001 by the Santana 20 Class Association Editors: Chris Winnard and Andrew Kerr Published by John Franklin, Class Secretary Publication Design and Prepress by: G2 Marketing Services 1790 Lemming Avenue Eugene, OR 97401 541-344-1979 Technicalities 2000 Table of Contents Getting Started Hoist and Ramp Launching & Retrieving ..............Ralph Taylor ............................................1 Regatta Preparation 5 Tricks to Pull Out of Your Sailbag This Season ......................................Chic Parsons & Dale Waagmeester ....3 Santana 20 Training....................................................Chic Parsons & Dale Waagmeester ....5 Practice Makes Perfect: Growing the Team ..........Andrew Kerr ..........................................5 Regatta Preparation ....................................................Andrew Kerr ..........................................8 Tuning by Feel and Sight ..........................................Lance Purdy ............................................9 Deck Layout Tips If Light is Fast, Lighter is Faster ............................Phillip Infelise ......................................12 Santana 20 Console Setup ........................................Ralph Taylor ..........................................15 Santana 20 Sailing Techniques Smile, the Wind is Howling ......................................Bob Pattison..........................................18 Bill Does Steering ......................................................Bill Jenkins ............................................20 -
Snipe Tuning Guide
Snipe Tuning Guide For any question you may have on tuning your Snipe for speed, contact our experts: Alex Camet 619-226-1415 [email protected] Chris Snow 619-226-1415 [email protected] Eric Heim 619-224-1414 [email protected] Eonedesign.com Follow North Sails on... Snipe Tuning Guide NORTH SAILS Rev. P0526 Dear Snipe sailor: the hull. Pay special attention to the area corrosion. You want to always wet sand around the bailer. the centerboard before sailing unless it is Thank you for choosing North Sails for anodized. your Snipe. As Snipe sailors ourselves we Most top sailors sharpen the last 4-5’ truly share your enthusiasm for this great of the chines and the intersection of the You may want to consider cutting out boat and the worldwide camaraderie transom and hull in the back of the boat. some of the board in the top of the board that Snipe sailors share. We wish you This allows the water to clear away from where it stays inside the boat when many happy seasons of racing your boat the hull more smoothly and promotes down all the way. This makes the board and hope that whenever you have any planning quicker when the breeze is up. lighter and less work for the crew to lift. questions about making your boat go fast Overweight boats can shave off a few that you will give us a call. We are always THE MAST pounds here by cutting away some of pushing to make our sails faster, longer The mast and its tuning are probably the the top of the board. -
Human Origin Sites and the World Heritage Convention in Eurasia
World Heritage papers41 HEADWORLD HERITAGES 4 Human Origin Sites and the World Heritage Convention in Eurasia VOLUME I In support of UNESCO’s 70th Anniversary Celebrations United Nations [ Cultural Organization Human Origin Sites and the World Heritage Convention in Eurasia Nuria Sanz, Editor General Coordinator of HEADS Programme on Human Evolution HEADS 4 VOLUME I Published in 2015 by the United Nations Educational, Scientific and Cultural Organization, 7, place de Fontenoy, 75352 Paris 07 SP, France and the UNESCO Office in Mexico, Presidente Masaryk 526, Polanco, Miguel Hidalgo, 11550 Ciudad de Mexico, D.F., Mexico. © UNESCO 2015 ISBN 978-92-3-100107-9 This publication is available in Open Access under the Attribution-ShareAlike 3.0 IGO (CC-BY-SA 3.0 IGO) license (http://creativecommons.org/licenses/by-sa/3.0/igo/). By using the content of this publication, the users accept to be bound by the terms of use of the UNESCO Open Access Repository (http://www.unesco.org/open-access/terms-use-ccbysa-en). The designations employed and the presentation of material throughout this publication do not imply the expression of any opinion whatsoever on the part of UNESCO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. The ideas and opinions expressed in this publication are those of the authors; they are not necessarily those of UNESCO and do not commit the Organization. Cover Photos: Top: Hohle Fels excavation. © Harry Vetter bottom (from left to right): Petroglyphs from Sikachi-Alyan rock art site. -
Centreboard Notice of Race & Sailing Instructions
Avalon Sailing Club Limited Old Wharf Reserve 28b Hudson Parade Clareville Beach Centreboard Notice of Race & Sailing Instructions Postal Address: PO Box 59 Avalon Beach NSW 2107 Phone: 02 9918 3637 (Clubhouse) Sundays only Website: www.avalonsailingClub.com.au Email: [email protected] or [email protected] Avalon Sailing Club Mainsheet 2019 - 2020 Table of Contents Centreboard Divisions 3 Blue Division: 3 Red Division: 3 Gold Division: 3 Wind Strengths 3 Safety Notes 3 Advice about Capsizes 4 Advice to Response Boat Operators 5 Section 1 - Notice of Race and Sailing Instructions 6 Section 2 - Course A (Gold AM) 10 Manly Junior, O’pen Skiff, Flying 11, Spiral 11 Sections 3 - Course B (Gold PM) 13 Laser Full Rig, International 420, International 29er, Finn, Spiral, Flying 11 and O’pen Skiffs 13 Race Management 16 A Guide for Spectator Boats 17 A Guide for Coach Boats 18 A Guide for Response Boats 19 Avalon Sailing Club Mainsheet 2019 - 2020 Centreboard Divisions Parents in each group will be rostered on to various duties around the Club, these are Blue Division: your children sailing at your Club and your help is needed to provide a safe and fun Each Sunday between 0800 and 1100hrs, learning environment. children learn the basics of safety and sailing via a three-stage program using the It is the responsibility of competitors to Club’s fleet of Puffin Pacers, Nippas and ensure that their boats comply with their Manly Juniors. Class Rules and in particular those relating to safety equipment. Note: Parents are expected to help and remain at the Club throughout the session. -
Rhode Island's Shellfish Heritage
RHODE ISLAND’S SHELLFISH HERITAGE RHODE ISLAND’S SHELLFISH HERITAGE An Ecological History The shellfish in Narragansett Bay and Rhode Island’s salt ponds have pro- vided humans with sustenance for over 2,000 years. Over time, shellfi sh have gained cultural significance, with their harvest becoming a family tradition and their shells ofered as tokens of appreciation and represent- ed as works of art. This book delves into the history of Rhode Island’s iconic oysters, qua- hogs, and all the well-known and lesser-known species in between. It of ers the perspectives of those who catch, grow, and sell shellfi sh, as well as of those who produce wampum, sculpture, and books with shell- fi sh"—"particularly quahogs"—"as their medium or inspiration. Rhode Island’s Shellfish Heritage: An Ecological History, written by Sarah Schumann (herself a razor clam harvester), grew out of the 2014 R.I. Shell- fi sh Management Plan, which was the first such plan created for the state under the auspices of the R.I. Department of Environmental Management and the R.I. Coastal Resources Management Council. Special thanks go to members of the Shellfi sh Management Plan team who contributed to the development of this book: David Beutel of the Coastal Resources Manage- Wampum necklace by Allen Hazard ment Council, Dale Leavitt of Roger Williams University, and Jef Mercer PHOTO BY ACACIA JOHNSON of the Department of Environmental Management. Production of this book was sponsored by the Coastal Resources Center and Rhode Island Sea Grant at the University of Rhode Island Graduate School of Oceanography, and by the Coastal Institute at the University SCHUMANN of Rhode Island, with support from the Rhode Island Council for the Hu- manities, the Rhode Island Foundation, The Prospect Hill Foundation, BY SARAH SCHUMANN . -
1998 Lake Michigan Crew Over Board Study Provided by the Lake Michigan Sail Racing Federation (LMSRF)
1998 Lake Michigan Crew Over Board Study Provided by the Lake Michigan Sail Racing Federation (LMSRF) This is an effort to encompass Offshore Racing Sailing stories from crew over boards during racing, on the way in or to the race course, delivery trips before or after a race along with Lake Michigan boats that attend races away from Lake Michigan. As these stories developed, it became clear that when a boat sank, the entire crew was then "over board". This simple fact, originally not considered, added greatly to the database. Many stories contain just the cold hard facts. The emotions and anxieties were removed to keep the possibility of a libel suit to a minimum, since these are stories typically told of others on board. The range of emotions in the stories include shrieking of women who believe they are seeing someone drown, foul language amongst crew accusing others of not pulling their weight, accusations that certain people are short of brain power or just plain stupid. Some involve crew mad at skipper, skipper mad at crew and crew mad at crew. Much of this type of anger seems to come out just at the stressful time of recovery and diffused quickly thereafter. Put yourself on board in each story and imagine how you would react in the situation. LM Case 1 As reported by Alan R. Johnston, January 21, 1998 In the 1973 Chicago-Mackinac race off Point Betsie, MI at 5 to 6 AM with the sun just over the horizon making light, there was a thud on the deck. -
High-Performance Solid Carbide End Mill Catalog
High-Performance Solid Carbide End Mill Catalog 3rd Edition GUHRING USA USA Headquarters California Distribution Center and Reconditioning Facility Brookfield Distribution Center, manufacturing and 15581 Computer Lane Reconditioning Facility Huntington Beach, CA 92649 1445 Commerce Avenue Tel (714) 841-3582 Brookfield, WI 53045 Fax (800) 877-7202 Tel (262) 784-6730 (800) 776-6170 Fax (262) 784-9096 Dear customers, Highest productivity, excellent economic efficiency and optimum machining results are the principles to which we steer our products and services towards. At Guhring this is achieved with great success by more than of 5,000 employees world-wide. Their objective is customer satisfaction and this makes Guhring the leading world wide manufacturer of rotary cutting tools. YOU BENEFIT IN MANY WAYS: Pooled expertise With Guhring tools you can rely on the tool material, the geometry and the coating – the essential parameters for the efficiency of a precision tool – to be perfectly coordinated. Our own carbide production, our own machine and equipment construction, our own coating technology as well as our own development departments ensure we maintain technological leadership in rotary cutting tools. Within the framework of our special tool production we develop optimized tools with an excellent price-performance-ratio for our customers. 2 Connecticut Reconditioning Facility Michigan Manufacturing and Reconditioning Facility 121 W Dudley Town Rd. 29550 W.K. Smith Rd. Suite B Bloomfield, CT 06002 New Hudson, MI 48165 Tel (860) 216-5948 Tel (248) 486-3783 Fax (860) 519-5819 Fax (248) 486-0046 Trend-setting innovations In excess of 600 granted patents world-wide are proof of our capability for innovation. -
Keelboat Test Skills Pg
Keelboat test skills Pg. 1 Allan Champion Preparation: inspection and prep of boat bilge, standing rigging & running rigging anchor ready to use jib sheets run properly Is throwable flotation in cockpit ready to use? has flashlight on deck and secured for night sailing? waterproof flashlight or strobe on your person in case you go in water? handheld, submersible VHF flares up to date? awareness of current conditions how does boat react differently in high, low and medium winds? Knots you know & when you’d use them (bowline, sheet bend, stopper knot, round turn & half hitches) Is everyone wearing their PFD? what are expected conditions, tide height and marine forecast can we sail over to south basin now? How about in 2 hours? What are breast and spring lines used for? Proper boat preparation and safety judgment. Lines ready to use sail selection for current conditions jury-rigging have flashlight(that works) and flares (up to date)? Crew Handling: Crew preparation clear & constant communication. Is your voice shrill or calm? Authoritative or inaudible? Assign and explain tasks to crew , and coach them through ARE PEOPLE HAVING FUN? ‘cuz that what it’s about! In Marina Traffic awareness Sailing overpowered/underpowered Where wouldn’t you sail with current conditons? where are danger zones/ bailouts? sailing with main only, jib only. How is boat different than with both sails? narrow channel sailing Emergency maneuvers what if main dropped unexpectedly? what if headsail or spinnaker wrapped around forestay? what if you are cast off early/ or onto wrong tack? departure and arrival at dock Upwind downwind crosswind boom push departure, zero sternway upwind departure upwind departure from downwind slip Keelboat test skills Pg. -
Wayfarer Racing
ayfarer Racing rig for racing racing techniques strategy and tactics 2 Content: 1 Rig for racing..............................................................................................................................................7 1.1. Hull, rudder and centreboard........................................................................................................7 1.1.1 Hull.............................................................................................................................................7 1.1.2. Rudder.......................................................................................................................................7 1.1.3. Tiller ..........................................................................................................................................7 1.1.4. Centreboard.............................................................................................................................7 1.1.5. general boat & sail security..................................................................................................8 1.2. Mast & rigging...................................................................................................................................8 1.2.1 spreaders..................................................................................................................................8 1.2.2 shrouds......................................................................................................................................8 -
'Standardized Chapel Library Project' Lists
Standardized Library Resources: Baha’i Print Media: 1) The Hidden Words by Baha’u’llah (ISBN-10: 193184707X; ISBN-13: 978-1931847070) Baha’i Publishing (November 2002) A slim book of short verses, originally written in Arabic and Persian, which reflect the “inner essence” of the religious teachings of all the Prophets of God. 2) Gleanings from the Writings of Baha’u’llah by Baha’u’llah (ISBN-10: 1931847223; ISBN-13: 978-1931847223) Baha’i Publishing (December 2005) Selected passages representing important themes in Baha’u’llah’s writings, such as spiritual evolution, justice, peace, harmony between races and peoples of the world, and the transformation of the individual and society. 3) Some Answered Questions by Abdul-Baham, Laura Clifford Barney and Leslie A. Loveless (ISBN-10: 0877431906; ISBN-13 978-0877431909) Baha’i Publishing, (June 1984) A popular collection of informal “table talks” which address a wide range of spiritual, philosophical, and social questions. 4) The Kitab-i-Iqan Book of Certitude by Baha’u’llah (ISBN-10: 1931847088; ISBN-13: 978:1931847087) Baha’i Publishing (May 2003) Baha’u’llah explains the underlying unity of the world’s religions and the revelations humankind have received from the Prophets of God. 5) God Speaks Again by Kenneth E. Bowers (ISBN-10: 1931847126; ISBN-13: 978- 1931847124) Baha’i Publishing (March 2004) Chronicles the struggles of Baha’u’llah, his voluminous teachings and Baha’u’llah’s legacy which include his teachings for the Baha’i faith. 6) God Passes By by Shoghi Effendi (ISBN-10: 0877430209; ISBN-13: 978-0877430209) Baha’i Publishing (June 1974) A history of the first 100 years of the Baha’i faith, 1844-1944 written by its appointed guardian.