Bistability can be generated by a positive feedback loop with an ultrasensitive regulatory step.

# From the hairpin loop, a DNA polymerase can then use it as a primer to transcribe a complementary sequence for the ss cDNA.

Rounds can also be created by working many stitches into a single loop.

Due to the heightened magnetic activity in these coronal loop regions, coronal loops can often be the precursor to solar flares and coronal mass ejections ( CMEs ).

It can be experimented by simply rotating a magnet within closed loop of a conducting material ( e. g. copper wire )

The behavior of the electromagnetic field can be resolved into four different parts of a loop:

The feedback loop can be summarized in a list, including phenomena belonging to each part of the loop:

Feedback oscillator circuits can be classified according to the type of frequency selective filter they use in the feedback loop:

Madden-Julian activity can also produce eastward-propagating oceanic Kelvin waves, which may in turn be influenced by a developing El Niño, leading to a positive feedback loop.

If f: X → Y morphism of pointed spaces, then every loop in X with base point x < sub > 0 </ sub > can be composed with f to yield a loop in Y with base point y < sub > 0 </ sub >.

Two loops can be combined together in an obvious way: travel along the first loop, then along the second.

If f: X → Y is a continuous map, x < sub > 0 </ sub > ∈ X and y < sub > 0 </ sub > ∈ Y with f ( x < sub > 0 </ sub >) = y < sub > 0 </ sub >, then every loop in X with base point x < sub > 0 </ sub > can be composed with f to yield a loop in Y with base point y < sub > 0 </ sub >.

To use other jumps on the back end of a combination, connecting jumps such as a half loop ( which is actually a full rotation, but lands on a left back inside edge ) can be used, enabling the skater to put a salchow or flip at the end of the combination.

For instance, the above loop can be re-written this way:

Its only remaining advantage is that while ADSL has a functional distance limitation and can use ADSL loop extenders, BRI has a greater limit and can use repeaters.

The active stitches are held on a needle until another loop can be passed through them.

In securing the previous stitch in a wale, the next stitch can pass through the previous loop from either below or above.

Depending on the distance between where the loop is drawn through the fabric and where it is knitted, dip stitches can produce a subtle stippling or long lines across the surface of the fabric, e. g., the lower leaves of a flower.

Long loops can also be drawn out and secured, forming a " shaggy " texture to the fabric ; this is known as loop knitting.

Many knots can also be used as makeshift tools, for example, the Bowline can be used as a rescue loop, and the Munter hitch can be used as a belay.

`` Reverse '', Elaine said, then peered through the loop of the RDF and waved to Poet.

The program tries every string, starting with the shortest, until it finds a string with complexity at least n ( if there is one ), then returns that string ( or goes into an infinite loop if there is no such string ).

This service involves installing a special telephone interface at the customer's premises that converts the analog signals from the customer's in-home wiring into a digital signal, which is then sent on the local loop ( replacing the analog last mile, or Plain old telephone service ( POTS )) to the company's switching center, where it is connected to the Public switched telephone network ( PSTN ).

Thus the loop f ∗ g first follows the loop f with " twice the speed " and then follows g with twice the speed.

If the painter encounters the mark but is going in a different direction, then some sort of loop has occurred which caused the painter to return to the mark.

The double-story form developed similarly, except that some ornate forms then extended the tail back to the right, and to the left again, forming a closed bowl or loop.

Generators drive much of the loop functionality in the language, but do so more directly ; the programmer does not write a loop and then pull out and compare values, Icon will do all of this for you.

There are various method employed to " cast on ," such as the " thumb method " ( also known as " slingshot " or " long-tail " cast-ons ), where the stitches are created by a series of loops that will, when knitted, give a very loose edge ideal for " picking up stitches " and knitting a border ; the " double needle method " ( also known as " knit-on " or " cable cast-on "), whereby each loop placed on the needle is then " knitted on ," which produces a firmer edge ideal on its own as a border ; and many more.

If there were no holes then a loop of rope kept the oars in place.

If i > n, then exit the loop.

If A = x, then exit the loop.

If i ≤ 0, then exit the loop.

If A = x, then exit the loop.

One can use that instruction, which is usually faster than a comparison against some arbitrary value ( requiring a subtraction ), to implement the command " If i ≤ 0, then exit the loop ".

Biograph retaliated for being frozen out of the Trust agreement by purchasing the patent to the Latham film loop, a key feature of virtually all motion picture cameras then in use.

One of his most notable works is the piece Metamorphosis III, which is wide enough to cover all the walls in a room, and then loop back onto itself.

For example, the Motorola 68010 ( and the obscure 68012 ) was a 68000 with improvements to the loop instruction and the ability to suspend then continue an instruction in the event of a page fault, enabling the use of virtual memory with the appropriate MMU hardware.

Since a lower loop gain and low-pass filtering increases the response time, a practical compromise must be reached.

This algorithm is much less prone to loss of precision due to massive cancellation, but might not be as efficient because of the division operation inside the loop.

There was no need for the wires to be connected back together into a loop, nor the need for hubs or other devices.

Machine code could be included within the high-level AA routines either to make an inner loop more efficient or to effect some operation which could not easily be done otherwise.

Also, a fighter jet flying straight and level will be able to do so closer to the crowd and lower than if it were performing a roll or a loop.

The usual reason which is given to refute the possibility of a causal loop is it requires that the loop as a whole be its own cause.

Sometimes it would be desired to obtain particular dynamics in the closed loop: i. e. that the poles have < math > Re

Crocheted fabric is begun by placing a slip-knot loop on the hook ( though other methods, such as a magic ring or simple folding over of the yarn may be used ), pulling another loop through the first loop, and repeating this process to create a chain of a suitable length.

Before the RISC philosophy became prominent, many computer architects tried to bridge the so called semantic gap, i. e. to design instruction sets that directly supported high-level programming constructs such as procedure calls, loop control, and complex addressing modes, allowing data structure and array accesses to be combined into single instructions.

For a while hybrid cable / electric systems operated, for example in Chicago where electric cars had to be pulled by grip cars through the loop area, due to the lack of trolley wires there.

There may also be symmetric flow from both loop foot points, causing a buildup of mass in the loop structure.

* Kirchhoff's voltage law: The directed sum of the electrical potential differences around a loop must be zero.