In this article, dedicated with admiration and friendship to Chaos and Difference (and hence Recurrence) Equations Guru Saber Elaydi, I give a new approach and a new algorithm for Chomp, David Gale’s celebrated combinatorial game. This work is inspired by Xinyu Sun’s “ultimate-periodicity” conjecture and by its brilliant proof by high-school-student Steven Byrnes. The algorithm is implemented i...

An increasing number of manufacturing processes rely on ultra-high speed and accuracy machines. Piezoceramic actuators are being utilized as parts of such machines. So far, only linear and switched-capacitor power supplies have been used for driving piezoceramic actuators in such applications. This paper proposes a switch-mode power supply to reduce cost and increase system efficiency. In the p...

Sea paciente y tierna/o; pero siga mostrándole al bebé la conducta que usted desea. Si usted reconoce y acepta ciertos tipos de conducta como parte del desarrollo normal del bebé, usted está usando buen criterio y disfrutará más de su bebé. Actividad: Enséñele al bebé el juego de “Ahhh.” Es una buena idea enseñarle al niño a decir “Ahhh,” a abrir la boca grande y a sacar la lengua. Este truco f...

The technology of direct AC/AC power conversion (Matrix converters) is gaining increasing interest in the scientific community, particularly for aerospace applications. In this paper a repetitive control system is proposed to regulate the output voltage of a four-leg matrix converter for a power supply application. The target application is a Ground Power Supply unit (GPU) for aircraft servicin...

Parry-Romberg syndrome is a rare clinical entity characterised by progressive hemifacial atrophy with appearance of 'saber'. Various neurological and otorhinolaryngological disorders are associated with this syndrome. The association of Parry -Romberg syndrome with Spasmodic dysphonia has rarely been reported. A 37 year old female presented with progressive atrophy of tissues of left side of fa...