HAMMER-ATHLETE RELATIONSHIP DURING THE HAMMER THROW

The present study analysed the movements of the athlete-hammer system in space, including phenomena that affect the functional course of the implement's circumferential velocity. The path of the spatial trajectory of the hammer head and pertinent anthropometric points were evaluated from the viewpoint of individual turns, the double and single support phase, and the delivery. For each throw the tangential and normal acceleration components and the forces acting on the implement were studied. It was determined that the positive factors, causing an increase in the velocity of the hammer head, included: 1. Vigorous leg action, with the feet continuously turning in a uninterrupted manner and never held in a static double-support position. 2. The gradual temporal shortenting of the single-support phase to make the single and double support phases of the last two turns of equal length. 3. The rotating of the trunk ahead of the pelvis, with a shift of the center of the shoulder connecting line toward the right hip-joint. 4. The turning of the shoulder axis ahead of the hammer-wire axis. 5. The vertical lifting of the hip-joints against the direction of the vertical motion of the grip and hammer head. 6. An obtuse angle, greater than 110 degrees, between the shoulder and hammer-wire axis, with the highest possible position of the implement ranging from 1.60 to 2.00 meters at the start of the delivery phase

WIZE WIZARDS WORDS OF WIZDOM

In keeping with our Kiwiana theme, we will have a Wise Wizards Panel (yes, think Lord of the Rings movie) to answer interactive questioning from the delegates. Panel members are prestigious previous Geoffrey Dyson awardees, Life members, and ISBS Fellows: Professors Patria Hume, Bruce Elliott, Joe Hamill, Walter Herzog and Juris Terauds. Professor Walter Herzog is a Professor at the University of Calgary. Professor Joe Hamill is currently President of the International Society of Biomechanics. Professor Patria Hume was the inaugural SPRINZ Director at the Auckland University of Technology. Professor Juris Terauds and Professor Bruce Elliott are both Emeritus Professors. Professor Bruce Elliott’s philosophy has always been “a good question leads to beneficial research”. Come prepared to ask these wise biomechanists all the things you have ever wanted to know about biomechanics, as a discipline and a career. Via the session chairs Associate Professor Jacqueline Alderson and Professor Gareth Irwin, and using a dedicated feed arranged by our ISBS Social Media Coordinator Kylie Robinson, you will be able to ask questions like; What does it take to have a successful academic career as a biomechanist? Where are some of the best experiences that can be gained in applied biomechanics? What is your crystal ball prediction of what biomechanics specialists will focus on in 10 years time? We hope that delegates, especially student and early career researchers, take up this unique opportunity to gather insight from those in whose footsteps they walk

GAYLORD II: A QUALITATIVE ASSESSMENT

In the process of awarding points, judges look at several elements in gymnast's routines. Among them, the element of risk weighs more heavily now than just a few years ago. Today's gymnasts do not expect to win in international competition by only including in their routines skills of moderate difficulty, even if those skills have been executed with maximum amplitude and expression. To win today the gymnast is required to be inventive and to definitely take more risks than a few years ago. As a result, a plethora of new skills is added constantly to the vast number of existing movements

Design of acoustic signals for a seal deterrent device

During the last decade, attacks by grey seals on fishing nets in the Baltic Sea have caused considerable loss of fish catch and damage to fishing gears. One of the approaches to reduce the number of seal attacks on fishing nets is to use acoustic deterrent devices (ADDs). Unfortunately, most of the commercially available ADDs are not well suited to the deployment in the sea and require considerable additional investments. The objective of the present research is to develop a compact and cost-efficient ADD for deployment in sea environment. This paper is devoted to the design of acoustic signals for a prototype ADD. Signals from other experimental and commercially available ADDs are studied and compared. Moreover, limitations imposed by underwater environment, transducers, battery power and fish hearing are analyzed and taken into account during development of signal patterns. The results of tests conducted in an artificial reservoir and in the sea are presented

Design of Acoustic Signals for a Seal Deterrent Device

During the past decade, attacks by grey seals on fishing nets in the Baltic Sea have caused considerable loss of fish catch and damage to fishing gears. One of the approaches to reduce the number of seal attacks on fishing nets is to use acoustic deterrent devices (ADDs). Unfortunately, most of the commercially available ADDs are not well suited to the deployment in the sea and require considerable additional investments. The objective of the present research is to develop a compact and cost-efficient ADD for deployment in the sea environment. This paper is devoted to the design of acoustic signals for a prototype ADD. Signals from other experimental and commercially available ADDs are studied and compared. Moreover, limitations imposed by the underwater environment, transducers, battery power, and fish hearing are analysed and considered during the development of signal patterns. The results of tests conducted in an artificial reservoir and in the sea are presented