providing of food products for increasing population, enhancing food security, increasing of production and foreign incomes are among the major program purposes of each country and monetary policies are one of the methods that immediately affected on food price and on major agriculture variables. time series analysis was used for studying the impacts of monetary policies effect on food price in...

2 Military systems that process classified information must operate in a secure manner; that is, they must adequately protect information against unauthorized disclosure, modification, and withholding. A goal of current research in computer security is to facilitate the construction of multilevel secure systems, systems that protect information of different classifications from users with diffe...

in this paper, a stochastic two-stage model is offered for optimization of the day-ahead scheduling of the microgrid. system uncertainties including dispatchable distributed generation and energy storage contingencies are considered in the stochastic model. for handling uncertainties, monte carlo simulation is employed for generation several scenarios and then a reduction method is used to d...

Devices which operate on sensitive data are becoming an ever-increasing part of our lives, and we are placing a continually growing amount of trust in them. However, their ability to provide the proper level of data protection is typically only checked through analysis by hand. This method cannot be known to be complete, and as a result it can be possible to obtain data which should remain secr...

We revisit the fundamental question of Bitcoin's security against double spending attacks. While previous work has bounded the probability that a transaction is reversed, we show that no such guarantee can be effectively given if the attacker can choose when to launch the attack. Other approaches that bound the cost of an attack have erred in considering only limited attack scenarios, and in fa...