Stabilizer, stabiliser, stabilisation or stabilization may refer to:
In mathematics, a symmetry group is an abstraction used to describe the symmetries of an object. A group action formalizes the relationship between the group and the symmetries of the object. It relates each element of the group to a particular transformation of the object.
In this case, the group is also called a permutation group (especially if the set is finite or not a vector space) or transformation group (especially if the set is a vector space and the group acts like linear transformations of the set). A permutation representation of a group G is a representation of G as a group of permutations of the set (usually if the set is finite), and may be described as a group representation of G by permutation matrices. It is the same as a group action of G on an ordered basis of a vector space.
A group action is an extension to the notion of a symmetry group in which every element of the group "acts" like a bijective transformation (or "symmetry") of some set, without being identified with that transformation. This allows for a more comprehensive description of the symmetries of an object, such as a polyhedron, by allowing the same group to act on several different sets of features, such as the set of vertices, the set of edges and the set of faces of the polyhedron.
Ship stabilizers are fins or rotors mounted beneath the waterline and emerging laterally from the hull to reduce a ship's roll due to wind or waves. Active fins are controlled by a gyroscopic control system. When the gyroscope senses the ship roll, it changes the fins' angle of attack to exert force to counteract the roll. Fixed fins and bilge keels do not move; they reduce roll by hydrodynamic drag exerted when the ship rolls. Stabilizers are mostly used on ocean-going (blue water) ships.
Fins work by producing lift or downforce when the vessel is in motion. The lift produced by the fins should work against the roll moment of the vessel. To accomplish this two wings, one installed underwater on either side of the ship are used. Stabilizers can be:
I've never been fond of white picket fences
Why do they take so much offense at that?
I always go against the grain
There must be something in my brain
That makes me want to fight
But are they true?
All these rules I gave myself?
Am I overcoming conditioning?
Or is this needless rebellion?
Am I raging for the sake of it
Or is there more I won't admit
They say it's selfish, that I will regret
I'd rather know for sure than create someone from a bet
It'd be far worse to find
I didn't have that state of mind
And ruin someone else's life
Are they true?
All these rules I gave myself?
Maybe I know myself
Better than I thought I did
But then what's led me to
All of this questioning