In order to conduct analytical tasks, data scientists often need to find relevant data from an avalanche of sources (e.g., data lakes, large organizational databases). This effort is typically made in an ad hoc, non-systematic manner, which makes it a daunting endeavour. Current data discovery systems typically require the users to find relevant tables manually, usually by issuing multiple queries (e.g., using SQL). However, expressing such queries is nontrivial, as it requires knowledge of the underlying structure (schema) of the data organization in advance. This issue is further exacerbated when data resides in data lakes, where there is no predefined schema that data must conform to. On the other hand, data scientists can often come up with a few example records of interest quickly. Motivated by this observation, we developed DICE---a human-in-the-loop system for <u>D</u>ata d<u>I</u>s<u>C</u>overy by <u>E</u>xample---that takes user-provided example records as input and returns more records that satisfy the user intent. DICE's key idea is to synthesize a SQL query that captures the user intent, specified via examples. To this end, DICE follows a three-step process: (1) DICE first discovers a few candidate queries by finding join paths across tables within the data lake. (2) Then DICE consults with the user for validation by presenting a few records to them, and, thus, eliminating spurious queries. (3) Based on the user feedback, DICE refines the search and repeats the process until the user is satisfied with the results. We will demonstrate how DICE can help in data discovery through an interactive, example-based interaction.

Technology has received a new dimension altogether with the advent of GPS units. Various products have been launched in order to make navigation an easy and user friendly experience. However, they still lack various features that would not only enhance the application of such devices but also make them highly efficient and reliable. With this view in mind, we discuss about a system that would help the vehicle users identify any possible collision likely to happen. Warning levels are to be generated each time there is a likelihood of any collision which can thus be avoided. This system is implemented with the help of inputs received from a tracking device placed on the vehicle.