Current planetary defense policy prioritizes a probability assessment of risk Earth impact by an asteroid or comet in the planning detection and mitigation strategies setting levels urgency budgeting to operationalize them. The result has been focus on asteroids Tunguska size, which could destroy city region, since this is most likely sort object we would need defend against. However complete c...

We propose a modification of a key component in the Doomsday Algorithm for calculating the day of the week of any given date. In particular, we propose to replace the calculation of the required expression: with where x is an input 2-digit year; y is the tens digit of x; z is the ones digit of x; We argue the fact that our modification operates on individual base-10 digits makes the algorithm e...

04.09.2023: Leder - In January, 2023, the Science and Security Board of Bulletin Atomic Scientists moved hands Doomsday Clock forward to 90 s before midnight, reflecting growing risk nuclear war (1).

This paper sets out to resolve how agents ought to act in the Sleeping Beauty problem and various related anthropic (self-locating belief) problems, not through the calculation of anthropic probabilities, but through finding the correct decision to make. It creates an anthropic decision theory (ADT) that decides these problems from a small set of principles. By doing so, it demonstrates that th...

Pedestrianand cyclistinvolved crashes at intersections remain a major concern in China due to high ratio of fatal injuries and fatalities. This paper develops the random parameters negative binominal model to determine the relationship between potential contributory factors and crash frequency involving pedestrians and bicyclists at intersection locations and identify the significant risk facto...