Subharmonics near an equilibrium point for Hamiltonian systems.
Sufficiency Conditions Under Which a Lagrangian is an Ordinary Divergence.
Sugli atti di moto, eventualmente isocori, più rigidi possibile
Sui moti di precessione di un corpo rigido
Sui moti polinomiali
Sul collasso di un ammasso di materia disgregata. Nota I
Starting from the considerations developed in [4], it is shown that the only forces at a distance exerted among the elements of an isolated spherical cluster of incoherent matter which, preserving homogeneity, is collapsing are those expressed by Newton's law of gravitation and those of the elastic type. Furthermore the reverse is shown, that is if the forces at a distance are of these two types during the collapse the homogeneity is preserved.
Sul collasso di un ammasso di materia disgregata. Nota II
With reference to Nota I, the hypothesis that the cluster is spherical is substituted by the hypothesis that it has an isotropic behaviour with respect to a given frame of reference with origin in an element internal to . The kinematical behaviour of during the collapse with respect to the frames of reference with origin in the elements of and in translatory motion with respect to is studied. This behaviour is the same with respect to each of such frames, which are in translatory motion...
Sul moto di un giroscopio in un campo gravitazionale centrale
Sul problema del rimbalzo in un insieme convesso
In the present paper we seek the bounce trajectories in a convex set which assume assigned positions in two fixed time instants. We find sufficient conditions in order to obtain the existence of infinitely many bounce trajectories.
Sul teorema di Liouville per deformazioni conformi
Sul vettore caratteristico della rotazione nei moti rigidi
Sulla legge di gravitazione universale. Nota I
Without making recourse to Newton's law of gravitation and starting from the concept of gravitational force, the concepts of active gravitational mass and of passive gravitational mass are introduced. Furthermore it is proved that they can be identified and that in Newton's law of gravitation the linear dependence on masses necessarily follows from the principle of superposition of simultaneous forces and from Newton's third law of dynamics.
Sulla non uniformità delle soluzioni delle equazioni dinamiche di un satellite in orbita circolare
In the case of a satellite in a circular orbit the solutions of Euler's equations are not single-valued for arbitrary initial values.
Sulle precessioni generalizzate semiregolari del solido pesante
Sulle precessioni semiregolari ad asse non verticale del solido pesante
Superintegrable oscillator and Kepler systems on spaces of nonconstant curvature via the Stäckel transform.
Superintegrable Potentials and superposition of Higgs Oscillators on the Sphere S²
The spherical version of the two-dimensional central harmonic oscillator, as well as the spherical Kepler (Schrödinger) potential, are superintegrable systems with quadratic constants of motion. They belong to two different spherical "Smorodinski-Winternitz" families of superintegrable potentials. A new superintegrable oscillator have been recently found in S². It represents the spherical version of the nonisotropic 2:1 oscillator and it also belongs to a spherical family of quadratic superintegrable...
Supplément au Mémoire sur le mouvement de rotation de la Terre.
Supplementary balance laws for Cattaneo heat propagation
In this work we determine for the Cattaneo heat propagation system all the supplementary balance laws (shortly SBL) of the same order (zero) as the system itself and extract the constitutive relations (expression for the internal energy) dictated by the Entropy Principle. The space of all supplementary balance laws (having the functional dimension 8) contains four original balance laws and their deformations depending on 4 functions of temperature (). The requirements of the II law of thermodynamics...
Supporting locomotive functions of a six-legged walking robot
This paper presents a method for building a foothold selection module as well as methods for the stability check for a multi-legged walking robot. The foothold selection decision maker is shaped automatically, without expert knowledge. The robot learns how to select appropriate footholds by walking on rough terrain or by testing ground primitives. The gathered knowledge is then used to find a relation between slippages and the obtained local shape of the terrain, which is further employed to assess...