More recently introduced terms such as 'annually laminated' are synonymous with varve. Of the many rhythmites in the geological record, varves are one of the most important and illuminating in studies of past climate change. Varves are amongst the smallest-scale events recognised in stratigraphy.
PCs are designed to shut down automatically when heat endangers the hardware. To find out if this is your problem, download and install Speedfan. It's small and free. Although Speedfan's basic job is controlling the speed of your PC's fans (you probably guessed that by the name), it also provides the CPU temperature.
Denial of service attacks (dos attack) are the most common way to shut down a website, many websites have been effected by such attacks, including, Facebook, Twitter, eBay, Amazon and multiple US government websites. ddos attack is where the hacker take control of multiple computers without the owner knowing by using a trojan, this creates what is called a botnet which is effectively a network of computers under the hackers control. Please subscribe for more cyber security videos! Have a great day!