Ankit Kumar (Prof. Borkar)
Temporally Agnostic Rumor Source Detection
Abstract: We revisit the problem of inferring the source of a rumour on a network given the snapshot of the extent of its spread. We do not assume a specific dynamic model for the spread, but assume that all spread patterns from any given node are equally likely and additional information is available about infection incidents in the form of a set of directed pairs of neighbouring nodes with the implication that the first is known to have infected the second. Under this hypothesis, we derive an expression for the most likely rumour source based on the Markov chain tree theorem and propose a Markov Chain Monte Carlo scheme to find it.
Ashutosh Patil (Prof. Shalabh Gupta)
Low Cost Hardware for Pulse Radar Based Level Measurement System.
Many devices exist in today’s market which can sense the level of a liquid surface. Many of them are based on the principle of transmission & reception of radio frequency (RF) pulses and estimate the distance from their Time of Flight (TOF) measurement. These are called "Radar Level Transmitters". The importance of the radar based level measurement devices comes in the situations requiring high resolution, range and ability to work in harsh environments composed of dust, vapour or foam. In case of pulse radars, as the transmitted pulses become narrower, its resolution increases. Fairly good precision can be achieved by using a nanosecond wide pulses and appropriate signal processing technique. Commercially available devices in this domain are costly. This limits their use for applications which requires very high precision. We believe that these devices can be made with sufficiently reduced cost by using an improved architecture.In this project we have attempted to make the low cost hardware for pulse radar based level measurement system operating at 3.6 GHz and capable of measuring depth up to 15 m while targeting resolution of 1 cm. In this talk, we will discuss various level measurement techniques and present the architecture and hardware currently being developed by us.