This period of time is called the restrike time. Restrike times for traditional probe-start MH lamps can take 15 minutes or longer, but restrike times for pulse-start MH lamps are generally much shorter (see Figure 4). According to manufacturers' literature, restrike times for pulse-start MH lamps can be more than twice as fast as for probe-start MH lamps.
Overview. Unix (officially UNIX) is a registered trademark of The Open Group that refers to a family of computer operating systems and tools conforming to The Open Group Base Specification, Issue 7 (also known as POSIX.1-2008 or IEEE Std 1003.1 - 2008).
The main concept that unites all the versions of Unix is the following four basics 1  â. Kernel â The kernel is the heart of the operating system. It interacts with the hardware and most of the tasks like memory management, task scheduling and file management. 2  Shell â The shell is the utility that processes your requests.