منابع مشابه
Shorter oars are more effective.
The purpose of this investigation was to clarify the effects of blade design and oar length on performance in rowing. Biomechanical models and equations of motion were developed to identify the main forces that affect rowing performance. In addition, the mechanical connection between the propelling blade force and the force that the rower applies on the handle was established. On this basis it ...
متن کاملPropulsive Efficiency of Rowing Oars
Is the common folklore, that oars are less efficient at propulsion than propellers, correct? Here we examine the propulsive efficiency of the oars used in competitive rowing. We take the propulsive efficiency η of rowing to be the ratio of the energetic benefit, the energy Db dissipated by boat drag, to the energetic cost, the work Wr performed by the rower. Air drag is neglected as is the ener...
متن کاملOARS: An Object-Oriented Architecture for Reactive Systems
1 This paper discusses an architecture designed to provide support for the development of state transition models for an object-oriented distributed environment. The state transition models can be constructed and specified hierachically as well as derived into new classes of objects through the use of inheritance. A new concept called “exit-safe states” is introduced to assist in the specificat...
متن کاملOARS: An Object-Oriented Architecture for Reactive Systems1
1 This paper discusses an architecture designed to provide support for the development of state transition models for an object-oriented distributed environment. The state transition models can be constructed and specified hierachically as well as derived into new classes of objects through the use of inheritance. A new concept called “exit-safe states” is introduced to assist in the specificat...
متن کاملDeveloping Undergraduate Use of OARS Skill Building for Senior Year Kinesiology Students
This article discusses course development, teaching, instructional methods and skills acquisition in motivational interviewing (MI) for kinesiology students completing a health coaching course in their senior year of undergraduate studies. The paper outlines how students 1) conducted a brief MI session, 2) applied open questions, affirmations, reflections and summaries (OARS) during a brief MI ...
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ژورنال
عنوان ژورنال: Nature
سال: 1873
ISSN: 0028-0836,1476-4687
DOI: 10.1038/007418a0