Micromouse and robotic ping pong have been interesting mechatronic applications for the past decade or more. Recently a number of educational institutions around the world have started using these two ‘fun’ robotic ideas as a basis for a more structured approach to robotic engineering education. At City Polytechnic of Hong Kong regular project work using micromouse has been going on for a numbe...

1 of 2 DESCRIPTION We report a term infant born by emergency C-section for fetal bradycardia. Active labour was established at the time of section, resulting in the fetus being deeply impacted and diffi cult to extract. Baby was born pale and fl oppy but responded to infl ation breaths. Antenatal scans were unremarkable. She was noted to have a depression measuring 4×4 cm in the right parietal ...

The motion of a classical particle bouncing elastically between two parallel walls, with one of the walls undergoing a periodic motion is considered. This problem, called Fermi–Ulam ‘ping-pong’, is known to possess only bounded solutions if the motion of the wall is sufficiently smooth p(t) ∈ C4+ , where p(t) is the position of the wall. It is shown that the stability result does not hold if p(...

Lecture 8 on Events & Delays discussed and developed two models for the ping pong ball whose control was a ping pong paddle. First an event-driven controller and then a time-triggered controller. Invariants have been identified in Lecture 8 but not proved. This lecture will study proofs. This lecture discusses: • What is a proof? • How does arithmetic happen in a proof? • Arithmetic hiding to w...

We design a vehicle with a steering system made of two independently rotatable wheels on the front. We quantify the effectiveness of the steering system in the mobility and maneuverability of the vehicle running in a box containing a layer ping-pong balls with a packing density 0.8, below the random close packing value 0.84 in 2D. The steering system can reduce the resistance exerted by the jam...

We present an algorithm to decide whether or not a finitely generated subgroup of the isometry group locally finite simplicial tree is both discrete and free. The correctness this relies on following conjecture: every ‘minimal’ n-tuple isometries either contains elliptic element satisfies hypotheses Ping Pong Lemma. prove conjecture for n=2,3, show that it implies generalisation Ihara's Theorem.