On most airlines, if you live in the city from which the flight is departing, you will not be eligible for compensation. To avoid the hassle of dealing with a flight cancellation (or delay), try booking flights that depart early in the day. That way, if your flight is cancelled, you will have more options for being rebooked on a later flight.
How Passive Radiators Work. A passive radiator speaker is a simple device that increases the low frequency response (Bass) of a speaker system*. When used properly, a passive radiator can give a speaker system the comparable performance characteristics of a much larger system; that's the point, in a nutshell.
Sometimes these types of heat sinks are referred to as an HSF, which is short for heat sink and fan. Passive heat sinks are 100% reliable, as they have no mechanical components. Passive heat sinks are made of an aluminum-finned radiator that dissipates heat through convection. For passive heat sinks to work to their full capacity, there should be a steady airflow moving across the fins. The above picture is an example of a heat sink that is both active and passive.