An uninterruptible power supply (UPS) or uninterruptible power source is an electrical apparatus that provides emergency power to a when the input power source or fails. A UPS differs from an auxiliary or or in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteri.
[PDF Version]
Although domestic ferries play an important role in the economy and security of the Philippines, they have serious negative environmental impacts on cities and society due to the use of fossil fuels. There is a g.
[PDF Version]
