Doubtful Bowling Actions Procedures
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Swing of a Cricket Ball
SCIENCE BEHIND REVERSE SWING C.P.VINOD CSIR-National Chemical Laboratory Pune BACKGROUND INFORMATION • Swing bowling is a skill in cricket that bowlers use to get a batsmen out. • It involves bowling a ball in such a way that it curves or ‘swings’ in the air. • The process that causes this ball to swing can be explained through aerodynamics. Dynamics is the study of the cause of the motion and changes in motion Aerodynamics is a branch of Dynamics which studies the motion of air particularly when it interacts with a moving object There are basically four factors that govern swing of the cricket ball: Seam Asymmetry in ball due to uneven tear Speed Bowling Action Seam of cricket ball Asymmetry in ball due to uneven tear Cricket ball is made from a core of cork, which is layered with tightly wound string, and covered by a leather case with a slightly raised sewn seam Dimensions- Weight: 155.9 and 163.0 g 224 and 229 mm in circumference Speed Fast bowler between 130 to 160 KPH THE BOUNDARY LAYER • When a sphere travels through air, the air will be forced to negotiate a path around the ball • The Boundary Layer is defined as the small layer of air that is in contact with the surface of a projectile as it moves through the air • Initially the air that hits the front of the ball will stick to the ball and accelerate in order to obtain the balls velocity. • In doing so it applies pressure (Force) in the opposite direction to the balls velocity by NIII Law, this is known as a Drag Force. -
Cricket Injuries
CRICKET INJURIES Cricket can lead to injuries similar to those seen in other sports which involve running, throwing or being hit by a hard object. However, there are some injuries to look out for especially in cricket players. Low Back Injuries A pace bowler can develop a stress fracture in the back. This can develop in the area of the vertebra called the pars interarticularis (“pars”) in players aged 12- 21. Parsstress fractures are thought to be caused by repetitive hyper-extension and rotation of the spine that can occur in fast bowling. The most common site is at the level of the 5th lumbar vertebra (L5). Risk Factors Factors in bowling technique that are thought to increase the risk of getting a pars stress fracture are: • Posture of the shoulders and hips when the back foot hits the ground: completely side-on and semi-open bowling actions are the safest. A mixed action (hips side-on and shoulders front-on or vice versa) increases the risk of injury. Interestingly, recent research is suggesting the completely front-on action may be unsafe as rotation of the spine tends to occur in the action following back foot impact. Up until now, front-on was thought to be the safest. • Change in the alignment of the shoulders or of the hips during the delivery stride. • Extended front knee at front foot contact with the ground. • Higher ball release height. The other general risk factor for injuries in bowlers is high bowling workload: consecutive days bowling and high number of bowling sessions per week. -
ICC Annual Report 2014-15
ANNUAL REPORT 2014-2015 INCLUDING SUMMARISED FINANCIAL STATEMENTS OUR VISION OF SUCCESS AS A LEADING GLOBAL SPORT, CRICKET WILL CAPTIVATE AND INSPIRE PEOPLE OF EVERY AGE, GENDER, BACKGROUND AND ABILITY WHILE BUILDING BRIDGES BETWEEN CONTINENTS, COUNTRIES AND COMMUNITIES. Strategic Direction A BIGGER, BETTER, GLOBAL GAME TARGETING MORE PLAYERS, MORE FANS, MORE COMPETITIVE TEAMS. Our long-term success will be judged on growth in participation and public interest and the competitiveness of teams participating in men’s and women’s international cricket. Mission Statement AS THE INTERNATIONAL GOVERNING BODY FOR CRICKET, THE INTERNATIONAL CRICKET COUNCIL WILL LEAD BY: • Providing a world class environment for international cricket • Delivering ‘major’ events across three formats • Providing targeted support to Members • Promoting the global game Our Values THE ICC’S ACTIONS AND PEOPLE ARE GUIDED BY THE FOLLOWING VALUES: • Fairness and Integrity • Excellence • Accountability • Teamwork • Respect for diversity • Commitment to the global game and its great spirit 01 CONTENTS FOREWORD 02 Chairman’s Report 04 Chief Executive’s Report 06 Highlights of the Year 08 Obituaries & Retirements DELIVERING MAJOR EVENTS 12 ICC Cricket World Cup 2015 20 ICC Women’s Championship 22 Pepsi ICC World Cricket League PROMOTING THE GLOBAL GAME 26 LG ICC Awards 2014 28 ICC Cricket Hall of Fame 30 Cricket’s Great Spirit PROVIDING A WORLD-CLASS ENVIRONMENT FOR INTERNATIONAL CRICKET 34 Governance of the Global Game 36 ICC Members 38 Development 40 Commercial 42 Cricket -
Delivering Justice: Food Delivery Cyclists in New York City
City University of New York (CUNY) CUNY Academic Works All Dissertations, Theses, and Capstone Projects Dissertations, Theses, and Capstone Projects 9-2018 Delivering Justice: Food Delivery Cyclists in New York City Do J. Lee The Graduate Center, City University of New York How does access to this work benefit ou?y Let us know! More information about this work at: https://academicworks.cuny.edu/gc_etds/2794 Discover additional works at: https://academicworks.cuny.edu This work is made publicly available by the City University of New York (CUNY). Contact: [email protected] DELIVERING JUSTICE: FOOD DELIVERY CYCLISTS IN NEW YORK CITY by DO JUN LEE A dissertation submitted to the Graduate Faculty in Psychology in partial fulfillment of the requirements for the degree of Doctor of Philosophy, The City University of New York 2018 ii © 2016 DO JUN LEE All Rights Reserved iii DELIVERING JUSTICE: FOOD DELIVERY CYCLISTS IN NEW YORK CITY by DO JUN LEE This manuscript has been read and accepted for the Graduate Faculty in Psychology to satisfy the dissertation requirement for the degree of Doctor of Philosophy. Susan Saegert Date Chair of Examining Committee Richard Bodnar Date Executive Officer Michelle Fine Tarry Hum Adonia Lugo Melody Hoffmann Supervisory Committee THE CITY UNIVERSITY OF NEW YORK iv ABSTRACT Delivering Justice: Food Delivery Cyclists in New York City by Do Jun Lee Advisor: Dr. Susan Saegert In New York City (NYC), food delivery cyclists ride the streets all day and night long to provide convenient, affordable, hot food to New Yorkers. These working cyclists are often Latino or Asian male immigrants who are situated within intersectional and interlocking systems of global migration and capital flows, intense time pressures by restaurants and customers, precarious tip-based livelihoods, an e-bike ban and broken windows policing, and unsafe streets designed for drivers. -
Bowling Performance Assessed with a Smart Cricket Ball: a Novel Way of Profiling Bowlers †
Proceedings Bowling Performance Assessed with a Smart Cricket Ball: A Novel Way of Profiling Bowlers † Franz Konstantin Fuss 1,*, Batdelger Doljin 1 and René E. D. Ferdinands 2 1 Smart Products Engineering Program, Centre for Design Innovation, Swinburne University of Technology, Melbourne 3122, Australia; [email protected] 2 Department of Exercise and Sports Science, Faculty of Health Sciences, University of Sydney, Sydney 2141, Australia; [email protected] * Correspondence: [email protected]; Tel.: +61-3-9214-6882 † Presented at the 13th conference of the International Sports Engineering Association, Online, 22–26 June 2020. Published: 15 June 2020 Abstract: Profiling of spin bowlers is currently based on the assessment of translational velocity and spin rate (angular velocity). If two spin bowlers impart the same spin rate on the ball, but bowler A generates more spin rate than bowler B, then bowler A has a higher chance to be drafted, although bowler B has the potential to achieve the same spin rate, if the losses are minimized (e.g., by optimizing the bowler’s kinematics through training). We used a smart cricket ball for determining the spin rate and torque imparted on the ball at a high sampling frequency. The ratio of peak torque to maximum spin rate times 100 was used for determining the ‘spin bowling potential’. A ratio of greater than 1 has more potential to improve the spin rate. The spin bowling potential ranged from 0.77 to 1.42. Comparatively, the bowling potential in fast bowlers ranged from 1.46 to 1.95. Keywords: cricket; smart cricket ball; profiling; performance; skill; spin rate; torque; bowling potential 1. -
+91-9908899800/+91-9966600014 Email - [email protected] SACHIN TENDULKAR COMMENTS on LEVERAGE BOWLING MACHINES
Contact - +91-9908899800/+91-9966600014 Email - [email protected] SACHIN TENDULKAR COMMENTS ON LEVERAGE BOWLING MACHINES Contact - +91-9966600014 or +91-9908899800 RAHUL DRAVID COMMENTS ON LEVERAGE BOWLING MACHINES Contact - +91-9966600014 or +91-9908899800 A LOW COST TWO WHEEL BOWLING MACHINE FOR BASIC BATTING PRACTICE. FEATURES Polyurethane concave wheels Bowls Hard Balls 150 kmph speed Basic swing, spin Auto feeder ( optional) 180 V Ac power PRICE – Rs.59,900/- Contact - +91-9966600014 or +91-9908899800 PRICE – Rs. 99,900/- A COMPUTERIZED TWO WHEEL CRICKET BOWLING MACHINE Contact - +91-9966600014 or +91-9908899800 FEATURES – LEVERAGE WINNER TWO WHEEL CRICKET BOWLING MACHINE Digital Operations Two Wheel Profile Computerized operations with Polyurethane wheel Criptex software Speed – up to 170 Pre set variations Concave wheels kmph In Swing Seam grip Specialty Variations technology Out Swing Programming Mode Hard and Cricket Leg spin Balls Usage Off Spin Random Mode Googly Regenerative Ready Indicator breaking system Wrong-un Speed Indicator Head Cover for BOWLING safety VARIATIONS Video Analysis Software Angular Box Battery Backup Robotic Alignment MECHANICS DIGITAL & PC OPERATIONS Contact - +91-9966600014 or +91-9908899800 TWO WHEEL DESIGN Leverage Winner is a two wheel bowling machine with sensor driven concave polyurethane wheels. POLYURETHANE Concave WHEELS New generation Polyurethane Concave sleeve, which can withstand heat, sun and humid conditions. In Leverage Winner Bowling Machine concave flanges are designed for most of the kinetic energy transfer to the ball. Polyurethane concave wheel Up to 170kmph speed can be achieved without harming the ball. Life of the SEAM GRIP wheels is long and does not get damaged even after 5 to 10 years of extensive practice. -
WTC Playing Conditions
ICC Test Match Playing Conditions Effective May 2021 CONTENTS 1 THE PLAYERS .............................................................................................................................................. 1 2 THE UMPIRES............................................................................................................................................... 4 3 THE SCORERS ............................................................................................................................................. 8 4 THE BALL ...................................................................................................................................................... 8 5 THE BAT ....................................................................................................................................................... 9 6 THE PITCH .................................................................................................................................................. 10 7 THE CREASES ............................................................................................................................................ 12 8 THE WICKETS............................................................................................................................................. 12 9 PREPARATION AND MAINTENANCE OF THE PLAYING AREA .................................................................. 13 10 COVERING THE PITCH .............................................................................................................................. -
Measuring Spin Characteristics of a Cricket Ball
12:00-12:15 pm Aaron J. Beach. Measuring spin characteristics of a cricket ball. (230) MEASURING SPIN CHARACTERISTICS OF A CRICKET BALL Aaron Beach, René Ferdinands and Peter Sinclair Exercise and Sport Science, Faculty of Health Sciences, University of Sydney, Sydney Australia The purpose of this paper is to outline an experimental procedure for measuring the spin rate and direction of spin axis of a cricket ball in flight. While the spin rate and horizontal direction of the spin axis are important for deviation upon impact with the ground, the lateral movement of the ball in the air requires a vertical elevation angle of the ball’s spin axis. Using three markers on the ball, a 3D Cortex motion analysis system was used to measure the vertical and horizontal components of the spin axis from six deliveries of ten bowlers of varying playing levels. Software was programmed to graphically display the magnitude and direction of the ball spin during the live capture, making it a potentially valuable performance analysis tool. The results show that bowlers had substantial differences in spin rate and spin axis orientation depending on their playing level. KEY WORDS: cricket, spin bowling, spin, flight, swerve. INTRODUCTION: In contrast to the athleticism of fast bowling in cricket, spin bowling is a more tactical and deceptive art. While spin bowlers generally aim to deceive batsmen by causing the ball to alter the direction of its bounce off the ground, another effective tactic is to make the ball deviate from its natural projectile motion during its flight. Two factors are commonly associated with the ball’s flight, often referred to as dip and drift. -
ICC Match Officials' T20 Almanac 2017/18
ICC T20 ALMANAC 2017 / 2018 ICC Match Officials’ T20 Almanac 2017/18 (Incorporating the 2017 Code of the MCC Laws of Cricket) Effective 28 September 2017 Effective 28 September 2017 Page 1 ICC T20 ALMANAC 2017 / 2018 ICC Men’s T20 Playing Conditions CONTENTS THE PREAMBLE – THE SPIRIT OF CRICKET…………………………………………………………………………5 1 THE PLAYERS………………………………………………………………………………………………………………6 2 THE UMPIRES ......................................................................................................................................................7 3 THE SCORERS................................................................................................................................................... 17 4 THE BALL ........................................................................................................................................................... 17 5 THE BAT ............................................................................................................................................................. 19 6 THE PITCH ......................................................................................................................................................... 21 7 THE CREASES ................................................................................................................................................... 23 8 THE WICKETS .................................................................................................................................................... 24 9 PREPARATION -
Standard One-Day International Match
STANDARD ONE-DAY INTERNATIONAL MATCH PLAYING CONDITIONS These playing conditions are applicable to all ODI matches from 1st October 2014 and supersede the previous version dated 1st October 2013. Included in this version are amendments to clauses 2.2, 3.5.3, Appendices 7 and 9 and new clauses 1.2.3, 3.5.3 b), Appendix 7 clauses 2.4 b) and 3.3 iv) and Appendix 9 clause 5 b). Except as varied hereunder, the Laws of Cricket (2000 Code 5th Edition - 2013) shall apply. Note: All references to ‘Governing Body’ within the Laws of Cricket shall be replaced by ‘ICC Match Referee’. 1 LAW 1 THE PLAYERS 1.1 Law 1.1 - Number of Players Law 1.1 shall be replaced by the following: A match is played between two sides. Each side shall consist of 11 players, one of whom shall be captain. 1.2 Law 1.2 - Nomination of Players Law 1.2 shall be replaced by the following: 1.2.1 Each captain shall nominate 11 players plus a maximum of 4 substitute fielders in writing to the ICC Match Referee before the toss. No player (member of the playing eleven) may be changed after the nomination without the consent of the opposing captain. 1.2.2 Only those nominated as substitute fielders shall be entitled to act as substitute fielders during the match, unless the ICC Match Referee, in exceptional circumstances, allows subsequent additions. 1.2.3 A player or player support personnel who has been suspended from participating in a match shall not, from the toss of the coin and for the remainder of the match thereafter: a) Be nominated as, or carry out any of the duties or responsibilities of a substitute fielder, or b) Enter any part of the playing area (which shall include the field of play and the area between the boundary and the perimeter boards) at any time, in- cluding any scheduled or unscheduled breaks in play. -
Bowling Skills
Bowling Skills Presented By Clinton Kempnich Valley Junior Coaching Director Level 3 CA Coach General issues for seam and spin The approach/run in, try to stay: •Smooth •Balanced •Economical •Rhythmical •Consistent •stay relaxed and try not to tense up. Angle of run up • Quicks/mediums‐ straight but angles and positions within the crease are can be used to effect. • Spinners ( personal choice and style but body pivot and position need to be considered) Tactics and plans • Warm ups • Direction‐ where to bowl? • Ball care • Build an over • Field settings Junior FAQ’s He throws but cannot get the concept of bowling, what do I do? The bowler skips twice before release? The bowler bowls 4 good balls and 2 “4” balls an over, why? Styles San Cincinnati Reds, Chapman 105 MPH Not so perfect - quick but Perfect but unusual and (168KPH) injured real quick , not injured. 160.58 km/h – 180 KPH anecdotal Direction • Front on • Side on • Mixed • All angles Forces at work • The faster the bowler runs into the wicket, the greater their physical conditioning needs to be to withstand the ground reaction forces (GRFs), in particularly at front foot contact. This can be anywhere between five to ten times the body weight (BW) of the bowler for each delivery. • Spondylolysis is an overuse injury that effects the hard tissue of the lower spine, specifically the lumbar. As seen in this picture, there is a fracture in the bone of the lumbar, thus meaning that it is a hard tissue injury. Action ‐ aspects to monitor • Aim to keep your head as steady and level as possible, looking towards your target. -
Race and Cricket: the West Indies and England At
RACE AND CRICKET: THE WEST INDIES AND ENGLAND AT LORD’S, 1963 by HAROLD RICHARD HERBERT HARRIS Presented to the Faculty of the Graduate School of The University of Texas at Arlington in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY THE UNIVERSITY OF TEXAS AT ARLINGTON August 2011 Copyright © by Harold Harris 2011 All Rights Reserved To Romelee, Chamie and Audie ACKNOWLEDGEMENTS My journey began in Antigua, West Indies where I played cricket as a boy on the small acreage owned by my family. I played the game in Elementary and Secondary School, and represented The Leeward Islands’ Teachers’ Training College on its cricket team in contests against various clubs from 1964 to 1966. My playing days ended after I moved away from St Catharines, Ontario, Canada, where I represented Ridley Cricket Club against teams as distant as 100 miles away. The faculty at the University of Texas at Arlington has been a source of inspiration to me during my tenure there. Alusine Jalloh, my Dissertation Committee Chairman, challenged me to look beyond my pre-set Master’s Degree horizon during our initial conversation in 2000. He has been inspirational, conscientious and instructive; qualities that helped set a pattern for my own discipline. I am particularly indebted to him for his unwavering support which was indispensable to the inclusion of a chapter, which I authored, in The United States and West Africa: Interactions and Relations , which was published in 2008; and I am very grateful to Stephen Reinhardt for suggesting the sport of cricket as an area of study for my dissertation.