The Experts below are selected from a list of 5127 Experts worldwide ranked by ideXlab platform

Blatter H - One of the best experts on this subject based on the ideXlab platform.

  • Intergalactic spaceflight: an uncommon way to relativistic kinematics and dynamics
    2006
    Co-Authors: Greber T, Blatter H
    Abstract:

    In the Special Theory of Relativity space and time intervals are different in different frames of reference. As a consequence, the quantity 'velocity' of classical mechanics splits into different quantities in Special Relativity, coordinate velocity, proper velocity and rapidity. The introduction and clear distinction of these quantities provides a basis to introduce the kinematics of uniform and accelerated motion in an elementary and intuitive way. Furthermore, rapidity links kinematics to dynamics and provides a rigorous way to derive Newtons Second Law in the relativistic version. Although the covariant tensorial notation of relativity is a powerful tool for dealing with relativistic problems, its mathematical difficulties may obscure the physical background of relativity for undergraduate students. Proper velocity and proper acceleration are the spatial components of the relativistic velocity and acceleration vectors, and thus, they provide a possibility to introduce and justify the vectorial notation of spacetime. The use of the three different quantities describing 'velocity' is applied to discuss the problems arising in a thought experiment of a relativistic spaceflight

Blatter Heinz - One of the best experts on this subject based on the ideXlab platform.

  • Intergalactic spaceflight: an uncommon way to relativistic kinematics and dynamics
    2006
    Co-Authors: Greber Thomas, Blatter Heinz
    Abstract:

    In the Special Theory of Relativity space and time intervals are different in different frames of reference. As a consequence, the quantity 'velocity' of classical mechanics splits into different quantities in Special Relativity, coordinate velocity, proper velocity and rapidity. The introduction and clear distinction of these quantities provides a basis to introduce the kinematics of uniform and accelerated motion in an elementary and intuitive way. Furthermore, rapidity links kinematics to dynamics and provides a rigorous way to derive Newtons Second Law in the relativistic version. Although the covariant tensorial notation of relativity is a powerful tool for dealing with relativistic problems, its mathematical difficulties may obscure the physical background of relativity for undergraduate students. Proper velocity and proper acceleration are the spatial components of the relativistic velocity and acceleration vectors, and thus, they provide a possibility to introduce and justify the vectorial notation of spacetime. The use of the three different quantities describing 'velocity' is applied to discuss the problems arising in a thought experiment of a relativistic spaceflight.Comment: 15 pages and 1 Figur

Mark O - One of the best experts on this subject based on the ideXlab platform.

  • Pressure Model of Soft Body Simulation
    2004
    Co-Authors: Maciej M, Mark O
    Abstract:

    Motivated by existing models used for soft body simulation which are rather complex to implement, we present a novel technique which is based on simple Laws of physics and gives high quality results in real-time. We base the implementation on simple thermodynamics Laws and use the Clausius-Clapeyron state equation for pressure calculation. In addition, this provides us with a pressure force that is accumulated into a force accumulator of a 3D mesh object by using an existing spring-mass engine. Finally after integration of Newtons Second Law we obtain the behavior of a soft body with fixed or non-fixed air pressure inside of it

Mark Ollila - One of the best experts on this subject based on the ideXlab platform.

  • Pressure Model of Soft Body Simulation
    2004
    Co-Authors: Maciej Matyka, Mark Ollila
    Abstract:

    Motivated by existing models used for soft body simulation which are rather complex to implement, we present a novel technique which is based on simple Laws of physics and gives high quality results in real-time. We base the implementation on simple thermodynamics Laws and use the Clausius-Clapeyron state equation for pressure calculation. In addition, this provides us with a pressure force that is accumulated into a force accumulator of a 3D mesh object by using an existing spring-mass engine. Finally after integration of Newtons Second Law we obtain the behavior of a soft body with fixed or non-fixed air pressure inside of it.Comment: 5 pages, 8 figures, conference - SIGRAD 2003, Umea, Swede

Greber T - One of the best experts on this subject based on the ideXlab platform.

  • Intergalactic spaceflight: an uncommon way to relativistic kinematics and dynamics
    2006
    Co-Authors: Greber T, Blatter H
    Abstract:

    In the Special Theory of Relativity space and time intervals are different in different frames of reference. As a consequence, the quantity 'velocity' of classical mechanics splits into different quantities in Special Relativity, coordinate velocity, proper velocity and rapidity. The introduction and clear distinction of these quantities provides a basis to introduce the kinematics of uniform and accelerated motion in an elementary and intuitive way. Furthermore, rapidity links kinematics to dynamics and provides a rigorous way to derive Newtons Second Law in the relativistic version. Although the covariant tensorial notation of relativity is a powerful tool for dealing with relativistic problems, its mathematical difficulties may obscure the physical background of relativity for undergraduate students. Proper velocity and proper acceleration are the spatial components of the relativistic velocity and acceleration vectors, and thus, they provide a possibility to introduce and justify the vectorial notation of spacetime. The use of the three different quantities describing 'velocity' is applied to discuss the problems arising in a thought experiment of a relativistic spaceflight