Plasma (physics) potential in the space between charged particles, independent of how it can be measured, is called the "plasma potential", or the "space potential". If an electrode is inserted into a plasma, its potential will generally lie considerably below the plasma potential due to what is termed a Debye sheath. The good electrical conductivity of plasmas makes their electric fields very small. This results in the important concept of "quasineutrality", which says the density of negative charges is approximately equal to the density of positive charges over large volumes of the plasma (formula_6), but on the scale of the Debye length
Negative and positive rights or "positive") requires both kinds of duties at once. In other words, Shue says that honouring a right will require avoidance (a "negative" duty) but also protective or reparative actions ("positive" duties). The negative positive distinction may be a matter of emphasis; it is therefore unhelpful to describe "any right" as though it requires only one of the two types of duties. To Shue, rights can always be understood as confronting "standard threats" against humanity. Dealing with standard threats requires all kinds of duties, which may be divided across time (e.g. "if avoiding the harmful behaviour fails, begin to repair