In terms of pastward time travel via traversable wormholes, for instance, a gatekeeping mechanism would determine, in a given situation of attempted time travel, whether the wormhole manipulation device being used will be able to enlarge the selected natural microscopic wormhole and condition it for transport, or not.

These missions can benefit from a heterogeneous team of UAVs and unmanned ground vehicles (UGVs) that rapidly survey the area, that identify key locations (for example, of survivors, damaged infrastructure) and traversable routes for ingress and egress, that locate VIPs, and that serve as mobile communication relays.

The unicycle model satisfies the Lie algebra rank condition for nonlinear controllability [36], and thus a diverse set of paths is traversable by the unicycle, where to traverse along the path, the velocity vector of the unicycle is parallel to the tangent of the path at each point on the path (i.e., zero lateral velocity).

Hod, "Rotating traversable wormholes," Physical Review D, vol.

Variable Category Frequency Percent Geometric design features Number of through 3 585 18.43 lanes 2 1660 52.28 1 930 29.29 Lane widths (ft) 12 915 28.82 11 1650 51.97 10 610 19.21 Number of left-turn 2 920 28.98 lanes 1 650 20.47 0 1605 50.55 Median type 1 for non- 1185 37.32 traversable median 0 for traversable 1990 62.68 median Shoulder type 2 for pavement 760 23.94 1 for gravel 1595 50.24 0 for dirt 820 25.83 Environmental factors Terrain type 1 for mountainous 1206 37.97 0 for rolling 1969 62.03 Land use type 2 for residential 1622 51.10 1 for commercial 775 24.41 0 for rural 778 24.49 Indicator for 1 for lighting 1304 41.06 lighting exists on the roadway segments 0 for others 1871 58.94 Table 3: The functional network between the input variables and the feature representations.

Antony Valentiniiv showed that the breakdown of Born's Rulev leads to EPR entanglement signaling, which via ER = EPRvi corresponds to particles moving through traversable ER wormhole closed timelike curves (CTC).

(93) A river makes a truer metaphor: winding, changing, traversable, fertile, uniting a region as much as dividing the shores.

They were allowed to attack any of these during the day or night if it was within 200 yards of a traversable trail or road.

From Friday until today snow has seen North Wales virtually grind to a halt, with even the main arterial road - the A55- almost impassable at times and many country roads only traversable by four-wheel drive vehicles and tractors.

The only way to keep these surfaces in traversable condition is to maintain them, which requires the right tools.

When passengers, who know that it is not a designated area to board a jeepney but insist on being there because 'other people are also waiting,' and, worse, crowd one lane of the supposed traversable road?

If an additional obstacle is found, the robot determines that there is a traversable gap and will navigate to the other side, as shown in Figure 5d.