Light Produced by Rubbing Quartz Pebbles Together

Lithophagia: pebbles in and pebbles out.

Fig. 1 : X-ray abdomen of the patient showing pebbles in rectum and the anal canal 35 year old male patient hailing from Sivani, madhya Pradesh had come with complaints of passing watery stools, dull aching pain in the abdomen since 10 to 15 days. Patient had been a case of mental retardation since childhood. he was noticed passing pebbles along with passage of watery stools. On further enquiry...

Structural Color Painting by Rubbing Particle Powder

Structural colors originate from purely physical structures. Scientists have been inspired to mimic the structures found in nature, the realization of these structures still presents a great challenge. We have recently introduced unidirectional rubbing of a dry particle powder on a rubbery surface as a quick, highly reproducible means to fabricate a single crystal monolayer assembly of particle...

Flipping Pebbles

We are trying to understand exactly how complicated these orbits are. A moment’s thought reveals that the toggle operation is reversible, so the orbit of any sequence must be a cycle. A few computational experiments suggest that the length of the cycle associated with a sequence of length n is about 2 and thus has exponential length. This leads to a natural computational question that we will r...

Numerical and Experimental Analyses of the Radiant Heat Flux Produced by Quartz Heating Systems

A method is developed for predicting the radiant heat ux distribution produced by tungsten lament , tubular fused-quartz envelope heating systems with re BLOCKINectors. The method is an application of Monte Carlo simulation, which takes the form of a random walk or ray tracing scheme. The method is applied to four systems of increasing complexity, including a single lamp without a re BLOCKINect...

The influence of hormones on the development of silicotic nodules produced by intraperitoneal injection of quartz.