However, shields for ships and planetary installations could and often did have extremely low penetration velocities, as artificial life support technologies could be utilized while the shield was active. As one would be unable to breathe within a shield that did not permit atmospheric gases to penetrate it, man-portable shields had a relatively high penetration velocity, approximately six to ten centimeters per second.
These shields were form-fitting energy fields which permitted penetration only by objects that moved below a pre-set velocity. New styles of fencing and knife fighting were developed to take advantage of this one small vulnerability.īy the time of Muad'dib, when thinking machines had long ceased to be a threat, the shield had been adopted for use in personal defense. The only effective combat method was the deft use and careful precision of a handheld dagger, if moved slowly enough. Such a practice made the use of projectile weapons and thrown blades partly obsolete. With the widespread use of shields, anyone of even minimal importance wore a body shield to protect against criminals, assassins, and accidents. How full shields are depicted in David Lynch's1984 film The center of this blast was determined by random chance sometimes it would originate within the shield, sometimes within the laser weapon, sometimes both. However, if a lasgun beam hit a Holtzman field, it would result in sub-atomic fusion and a nuclear explosion. Shields used to protect installations can and usually do have far lower penetration velocities, as life support technologies can be used to recycle atmosphere while the shield is active.
A shield could also be set to cover either the left or right side of a person if the specific need for it arose. Depending on the shield's setting, the object's speed while passing through the shield would range from six to nine centimeters per second. This is vital in personal defense shields, as one would suffocate within a shield that did not admit atmospheric gasses. Shields can be calibrated to permit the passage of matter below given speeds. A shield was produced by a Holtzman generator, the field deriving from Phase One of the suspensor-nullification effect.
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