user: Are there more wheels or doors in New York City?

assistant: This has been a long-term debate. I think there are more wheels than doors in New York City. Here is why. Many people who argue there are more doors bring up office doors, car doors (cars also have 4 wheels), cabinets, refrigerators, etc. However, I think what sets the number of wheels apart from doors is office chairs. Each office chair has four wheels and zero doors. Now multiply the number of workers in New York by four and that will get you the number of additional wheels - which I think offsets the number of doors that exist in the city.

user: How are noble gases obtained?

assistant: Neon, argon, krypton, and xenon are obtained from air in an air separation unit using the methods of liquefaction of gases and fractional distillation. Helium is sourced from natural gas fields that have high concentrations of helium in the natural gas, using cryogenic gas separation techniques, and radon is usually isolated from the radioactive decay of dissolved radium, thorium, or uranium compounds.

user: What is a digital twin?

assistant: A digital twin is a virtual representation of an object, product, piece of equipment, person, process, or even a complete manufacturing ecosystem. It is created using data derived from sensors (often IoT or IIoT) that are attached to or embedded in the original object. This data allows for both structural and operational views of what happens to the object in real-time, allowing engineers to monitor systems and model systems dynamics. Adjustments can be made to the digital twin to assess the impact of real-world changes before making any changes to the original system.

For a discrete or process manufacturing, a digital twin gathers process and system data with the help of various IoT sensors (both IT and OT) to form a virtual model which is then used to run simulations, study performance issues, and generate new insights.