How are variables used in simulations of complex systems?

I have noticed file /var/mail/mail is growing in size. It gets slightly bigger every minutes. For now it 911MB. What is that file? VAR stands for Volt-Amps Reactive and is the measuring unit for reactive power, which is created by energizing transformers and powering motors, pumps, air ... Oct 8, 2018 ... Since Var(Y)=Cov(Y,Y), a negative sign on the variance "pulls out twice" which cancels. (Or if you prefer a more probabilistic proof, the ... Feb 14, 2025 ... A VAR review in curling? Sometimes this measuring device is needed to work out exactly which stone is closer to the centre. World Curling # ... Apr 20, 2014 ... /var/run (or, more recently, /run ) is for system information data describing the system since it was booted. Such system information include PID files and ... Mar 9, 2015 ... VAR is "Volt-Amp Reactance." When you design a power supply, it is designed to deliver a certain electrical pressure (voltage) and be capable of delivering a ... Dec 25, 2023 ... VAR is a technology-aided officiating system intended to assist on-field referees to make accurate decisions during crucial junctures of a football match. Nov 1, 2017 ... In many discussion, i have read that ("We have sent to VAR", "VAR redirected to .. ", ..). I am not understanding what does VAR mean? Jun 24, 2019 ... VAR is essentially soccer's instant replay system. On March 3, 2018, the International Football Association Board (IFAB), the top rulemaking ... Jun 19, 2009 ... This is the mail spool, ie where the mail goes before it gets delivered. So it's quite likely that postfix may be putting mail there before it goes to the user ...