The first B-17 Flying Fortress heavy bombers arrived in 1942, giving students their first chance to train in the gun turret of an actual combat plane and providing aircraft to train co-pilots in ground and transition school.

Vert ramps are so named because they transition from a horizontal plane ( known as the flat-bottom ) to a vertical wall.

Atlantean society, at the height of technological and spiritual enlightenment, performed ' transition ' and ascended to a higher plane of existence.

300 centuries later, humanity attempted a technology-based ' transition ' initiated by Robert Charon and Nathan Appolyon ; rather than a higher plane of existence, this threw most of humanity into the universe known as the Negation.

ETA political-military ( Spanish: ETA político-militar, Basque: ETA politiko-militarra ) or ETA ( pm ) was a faction ( actually the majority ) of the Basque revolutionary armed organization ETA, who during Spain's transition to democracy proposed initially a double political and military type of work, by contrast to ETA militarra or ETA ( m ), who initially wanted to keep the struggle only in the military plane.

When carbon undergoes a reaction that changes its hybridization from sp < sup > 3 </ sup > to sp < sup > 2 </ sup >, the out of plane bending force constant at the transition state is weaker as it is developing sp < sup > 2 </ sup > character and a " normal " SKIE is observed with typical values of 1. 1 to 1. 2.

Conversely, when carbon's hybridization changes from sp < sup > 2 </ sup > to sp < sup > 3 </ sup >, the out of plane bending force constants at the transition state increase and an inverse SKIE is observed with typical values of 0. 8 to 0. 9.

The addition of fog — a variably transparent region of color or texture just before the clipping plane — can help soften the transition between what should be in plain sight and opaque, and what should be beyond notice and fully transparent, and therefore does not need to be rendered.

This effect ( the “ end correction ”) is caused by the vibrating steam inside the whistle engaging vibration of some steam outside the enclosed pipe, where there is a transition from plane waves to spherical waves.

With Rex Stout's Nero Wolfe, alienation is represented on a purely physical plane.

there is no easy and quick way to follow from the oxcart to the jet plane.

He is thought either to have been killed by the Fascists as soon as he landed or to have killed himself by flying out to sea and crashing his plane.

And how very often a water plane is featured in his landscapes, and how appropriate that he should appear in American Artist again, in his natal month of March!!

If A is the major axis of an ellipsoid and B and C are the other two axes, the radius of curvature in the ab plane at the end of the axis Af, and the difference in pressure along the A and B axes is Af.

Also, planetary gravitational attraction increases the dust concentration near the plane of the ecliptic as the sun is approached.

Consider a simple, closed, plane curve C which is a real-analytic image of the unit circle, and which is given by Af.

For if it did, the plane of L and l' would contain two generators of Af, which is impossible.

The class of the congruence is Af, since an arbitrary plane meets **zg in K points.

For the lines of any plane, **yp, meeting Q in a conic C, are transformed into the congruence of secants of the curve C' into which C is transformed in the point involution on Q.

Hence, thought of as a line in a particular plane **yp, any tangent to Q has a unique image and moreover this image is the same for all planes through L.

Clearly, any line, l, of any bundle having one of these points of tangency, T, as vertex will be transformed into the entire pencil having the image of the second intersection of L and Q as vertex and lying in the plane determined by the image point and the generator of Af which is tangent to **zg at T.

Therefore, the congruence of its secants, that is the image of a general plane field of lines, is of order Af and class Af.

Finally, the image of a general bundle of lines is a congruence whose order is the order of the congruence of invariant lines, namely Af and whose class is the order of the image congruence of a general plane field of lines, namely Af.

By ( 1 ), the image of this pencil is a ruled surface of order Af which is met by the plane of the pencil in a curve, C, of order Af.

On C there is a Af correspondence in which the Af points cut from C by a general line, l, of the pencil correspond to the point of intersection of the image of L and the plane of the pencil.

In the upper center of Braque's first collage, Fruit Dish ( in Douglas Cooper's collection ), a bunch of grapes is rendered with such conventionally vivid sculptural effect as to lift it practically off the picture plane.

Af is the shear force along the shear plane ; ;

Af is the normal compressive force acting on the shear plane ; ;

If is an outward pointing in-plane normal, whereas is the unit vector perpendicular to the plane ( see caption at right ), then the orientation of C is chosen so that a tangent vector to C is positively oriented if and only if forms a positively oriented basis for R < sup > 3 </ sup > ( right-hand rule ).

Placing a somewhat closed right hand on the plane with the thumb pointing up, the fingers point from the x-axis to the y-axis, in a positively oriented coordinate system.

Above, it turns into an helical antiferromagnetic state in which all of the atomic moments in a particular basal plane layer are parallel, and oriented at a fixed angle to the moments of adjacent layers.

Terbium has a simple ferromagnetic ordering at temperatures below 219 K. Above 219 K, it turns into a helical antiferromagnetic state in which all of the atomic moments in a particular basal plane layer are parallel, and oriented at a fixed angle to the moments of adjacent layers.

The galvanometer is oriented so that the plane of the coil is parallel to the local magnetic meridian, that is the horizontal component of the Earth's magnetic field.

Suppose we are given a closed, oriented curve in the xy plane.

A plastic-enclosed coil of wire is held next to the skull and when activated, produces a magnetic field oriented orthogonally to the plane of the coil.

This point lies on a line oriented 60 ° counterclockwise from the positive x-axis ( or 30 ° clockwise from the positive y-axis ) and 50 ° below the horizontal plane z = 0.

One example is the normal to an oriented plane.

An oriented plane can be defined by two non-parallel vectors, a and b, which can be said to span the plane.

The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft.

If the sample is oriented so that one particular plane is only slightly tilted away from the strongest diffracting angle ( known as the Bragg Angle ), any distortion of the crystal plane that locally tilts the plane to the Bragg angle will produce particularly strong contrast variations.

Given a sphere of unit radius, place its center at the origin of the complex plane, oriented so that the equator on the sphere coincides with the unit circle in the plane, and the north pole is " above " the plane.

Let C be a positively oriented, piecewise smooth, simple closed curve in the plane < sup > 2 </ sup >, and let D be the region bounded by C. If L and M are functions of ( x, y ) defined on an open region containing D and have continuous partial derivatives there, then

A curved phasefront may be synthesized from an infinite number of these " natural modes " i. e., from plane wave phasefronts oriented in different directions in space.

Common types of low-gain omnidirectional antennas are the whip antenna, " Rubber Ducky ", ground plane antenna, vertically oriented dipole antenna, discone antenna, mast radiator, horizontal loop antenna ( sometimes known colloquially as a ' circular aerial ' because of the shape ), and the halo antenna.

If — for example — a wall describing an east-west line is under construction, then bricks oriented to point north-south may be built into the width of the wall, their length spanning two widths of brick and tying the brickwork on the transverse plane.

There are also continuously variable cycles with infinitely many elements, such as the oriented unit circle in the plane.