The physics of juggling a spinning ping-pong ball

A ping-pong ball in left atrium.

Accepted 18 December 2017 DesCripTion Rheumatic heart disease (RHD) is much prevalent in low/middle-income country like India with the prevalence ranging from 0.2 to 1.1/1000 for RHD and from 0.0007 to 0.2/1000 for rheumatic fever. Factors that precipitate the formation of clot are atrial fibrillation (AF) rhythm, left atrial (LA) size, duration of symptoms, advanced age and severity of mitral ...

Ping pong ball in the hefty heart: a case report.

We describe here a very unusual case of a large free floating left atrial thrombus due to critical mitral stenosis detected by incidental echocardiography, in whom peculiar symptoms and complications of ball thrombus were absent. The patent's only symptom was mild dyspnoea attributed to smoking. She had no syncope or arrhythmia induced embolic event. Owing to non-availability of cardiothoracic ...

Analysis of the Ping-Pong Ball Gun-Theoretical & Computational Approach

A Receding Horizon Control for Lifting Ping-pong Ball

This paper proposes a control system for lifting a ping-pong ball without the use of a camera. The system measures the time of collision between a plate and a ball with a microphone. The control system must then be able to direct both the position and the velocity of a motor for each subsequent collision, even if the model contains uncertainty or modeling errors. To achieve this objective, an o...

Ping pong in the pore

Getting to the inner circle ontiguity between the ER and the nuclear envelope means nuclear membrane proteins have a direct shot to their target. In fact, inner nuclear membrane (INM) proteins were thought to need only to diffuse to the nucleus, pass through the nuclear pore, and then be retained by nuclear-localized binding partners. But new results suggest a more active process. Suraj Saksena...