Medium Range Aircraft Fuel Policy in the Light of Available Software, and Knowledge in the Industry

The rational use of fuel in aviation industry together with the improved operational safety level and productivity are common and permanent goal that all airlines in the world strive to achieve. Different environmental influences and constraints affect each of them through multiple layers of activities. The constant awareness of them and mastering equipment airline exploits make reaching those goals more viable. Croatia Airlines is the sole Croatian scheduled air carrier. Being major consumer of fuel and having in mind international sense that air transportation has Croatia Air-lines has to obey worldwide applied criteria. Paper lists environmental influences together with airline characteristics that make fuel policy so important factor. It compiles theoretical foundation together with methods used in formulating fuel policy. Operational data and its use for deriving one of the indicators related to medium range aircraft fuel consumption are listed at the end

Simple, near-optimal quantum protocols for die-rolling

Die-rolling is the cryptographic task where two mistrustful, remote parties wish to generate a random $D$-sided die-roll over a communication channel. Optimal quantum protocols for this task have been given by Aharon and Silman (New Journal of Physics, 2010) but are based on optimal weak coin-flipping protocols which are currently very complicated and not very well understood. In this paper, we first present very simple classical protocols for die-rolling which have decent (and sometimes optimal) security which is in stark contrast to coin-flipping, bit-commitment, oblivious transfer, and many other two-party cryptographic primitives. We also present quantum protocols based on integer-commitment, a generalization of bit-commitment, where one wishes to commit to an integer. We analyze these protocols using semidefinite programming and finally give protocols which are very close to Kitaev's lower bound for any $D \geq 3$. Lastly, we briefly discuss an application of this work to the quantum state discrimination problem.Comment: v2. Updated titl