Search results for " Bill"

Dynamics of a particle confined in a two-dimensional dilating and deforming domain

2014

Some recent results concerning a particle confined in a one-dimensional box with moving walls are briefly reviewed. By exploiting the same techniques used for the 1D problem, we investigate the behavior of a quantum particle confined in a two-dimensional box (a 2D billiard) whose walls are moving, by recasting the relevant mathematical problem with moving boundaries in the form of a problem with fixed boundaries and time-dependent Hamiltonian. Changes of the shape of the box are shown to be important, as it clearly emerges from the comparison between the "pantographic", case (same shape of the box through all the process) and the case with deformation.

Strongly super-Poisson statistics replaced by a wide-pulse Poisson process: The billiard random generator

2021

Abstract In this paper we present a study on random processes consisting of delta pulses characterized by strongly super-Poisson statistics and calculate its spectral density. We suggest a method for replacing a strongly super-Poisson process with a wide-pulse Poisson process, while demonstrating that these two processes can be set in such a way to have similar spectral densities, the same mean values, and the same correlation times. We also present a billiard system that can be used to generate random pulse noise of arbitrary statistical properties. The particle dynamics is considered in terms of delta and wide pulses simultaneously. The results of numerical experiments with the billiard s…

Non-smooth modelling of billiard- and superbilliard-ball collisions

2008

Abstract A description of billiard-ball collisions using a ‘discontinuous’ model is presented considering a two-step situation corresponding to the ball–ball interaction followed by ball-supporting surface interaction. It is applied to the inelastic impact of a cue ball having arbitrary pivotment and ‘English’ spins against an object ball initially at rest. This formulation provides a simplified approximation to the ‘continuous’ models of impact and considers two different regimes of impact: gross slip, and slip–stick, described in terms of coefficients of friction and restitution. As a result, the angles of scattering of the balls just after the impact (post-collision angles) and when the …

Old or new occupants of energy rehabilitated buildings. Two different approaches for hierarchizing group of buildings

2017

Abstract Public Administrations are frequently entitled to intervene in building stocks with energy rehabilitation actions. Unfortunately, the monetary budget at their disposal is generally limited and, consequently, a prioritization criterion is needed to optimize its allocation. The classification of the building energy performance is increasingly used by Public Administrations for this purpose. Here we argue that a proper prioritization criterion should depend upon the potential subjects to which the rehabilitated buildings are given back. If the energy rehabilitation is conducted on buildings that will be assigned to new dwellers, it would be preferable to use the energy class – which i…

Coulomb-interacting billiards in circular cavities

2013

We apply a molecular dynamics scheme to analyze classically chaotic properties of a two-dimensional circular billiard system containing two Coulomb-interacting electrons. As such, the system resembles a prototype model for a semiconductor quantum dot. The interaction strength is varied from the noninteracting limit with zero potential energy up to the strongly interacting regime where the relative kinetic energy approaches zero. At weak interactions the bouncing maps show jumps between quasi-regular orbits. In the strong-interaction limit we find an analytic expression for the bouncing map. Its validity in the general case is assessed by comparison with our numerical data. To obtain a more …

The distribution of velocities in an ensemble of accelerated particles on a surface

2016

An ensemble of particles diffusing with acceleration on a surface is considered as a 2D billiard system. The process of the finite-time diffusion of particles is studied using the balance equation. The probability distribution functions of the velocity and lifetime of particles are obtained analytically and by means of numerical simulations. A thermodynamic interpretation of the process is discussed. The effective temperature and entropy obey the relationship for an ideal gas.

Words and Deeds : Discord between the British Parliament and the Women’s Social and Political Union relating to the First Conciliation Bill of 1910

2021

This article focuses on the question of women’s suffrage in Britain by analyzing the interaction between the House of Commons and the Women’s Social and Political Union (WSPU) - the radical suffrage organization founded in 1903 and led by the famous Pankhursts. Central to this study are parliamentary debates relating to the Parliamentary Franchise (Women) Bill, better known as the first Conciliation Bill in 1910, as well as the writings published in 1910 in WSPU’s periodical, Votes for Women. To give a fresh angle to existing research on the question of female franchise, the parliamentary aspect is emphasized and connected to the suffragettes, the members of the WSPU. The kind of influence …

Carpe diem, Calvin : Bill Wattersonin Calvin and Hobbes -sarjakuvan arvomaailma

1999

Les usines Renault de Billancourt

2017

International audience

Considerazioni sparse, in chiave comparatistica, sulle proposte di legge in materia di eutanasia e di suicidio medicalmente assistito

2019

The essay deals with proposed legislations, in Italy and in England, about euthanasia and assistance in dying. It aims to confront the different solutions in both legal systems, for the purpose of finding the best result for the respect of the dignity of people suffering for terminal illness.