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Page "Field electron emission" ¶ 28
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When and emitter
When a zone comes on, the water flows through the lateral lines and ultimately ends up at the irrigation emitter ( drip ) or sprinkler heads.
When all the inputs are held at high voltage, the base – emitter junctions of the multiple-emitter transistor are reverse-biased.
When thrust is required, a strong electric field is generated by the application of a high voltage difference between the emitter and the accelerator.
When the emitter voltage is driven approximately one diode voltage above the voltage at the point where the P diffusion ( emitter ) is, current will begin to flow from the emitter into the base region.
When called to defend him on Newsnight his friend the former Labour MP Woodrow Wyatt caused further merriment by claiming that Lamont could do an excellent impersonation of a Scops-owl ( whose cry, Lamont later explained, " sounds like a tennis ball emitter ").
When a plate of rock-salt is heated via conduction and let stand on an insulator, it takes an exceptionally long time to cool down ; i. e., it's a poor emitter of infrared.
When the emitter is so sharp that atomic-level detail cannot be neglected, and / or the tunneling barrier is thicker than the emitter-apex dimensions, then a more sophisticated approach is desirable.
When the emitter Fermi level is used as the reference zero level, both ε and ε < sub > n </ sub > can be either positive or negative.
When the input voltage ( Q1 base voltage ) rises slightly above the voltage across the emitter resistor R < sub > E </ sub > ( the high threshold ), Q1 begins conducting.
When using a mesh object as an emitter, the initial velocity vector is often set to be normal to the individual face ( s ) of the object, making the particles appear to " spray " directly from each face.
When a large Confederate attack force landed near their base, the rebel leader Arcturus Mengsk ordered a psi emitter be used to lure the Zerg into attacking the Confederates.
When looking at the face of the transistor, the leads are commonly configured from left-to-right as the emitter, base, and collector for 2N series ( JEDEC ) transistors, however, other configurations are possible, such as emitter, collector, and base commonly used for 2S series ( Japanese ) transistors.

When and surface
When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.
When problems with poor control at high speed were first encountered, they were addressed by designing a new style of control surface with more power.
When dry, acrylic paint is generally non-removable from a solid surface.
When surface to air missiles became capable of hitting high flying aircraft bombers, bombers used flight at low altitude to evade radar detection.
When evaluating a coin, the following — often subjective — factors may be considered: 1 ) " eye appeal " or the aesthetic interest of the coin ; 2 ) dents on the rim ; 3 ) unsightly scratches or other blemishes on the surface of the coin ; 4 ) luster ; 5 ) toning ; 6 ) level of detail retained, where a coin with full details obviously is valued higher than one with worn details.
When metal ions are reduced from ionic solution, they form a pure metal surface on the cathode.
When particles in a beam are thrown against a foil made of a certain substance, the cross section is a hypothetical area measure around the target particles of the substance ( usually its atoms ) that represents a surface.
When the angle θ does not satisfy the above condition, the horizontal component of force exerted by the road does not provide the correct centripetal force, and an additional frictional force tangential to the road surface is called upon to provide the difference.
When the magma approaches the surface of the Earth, the rapid off-loading of overlying material causes the trapped gases to decompress rapidly, thus triggering explosive destruction of the magma and spreading volcanic ash over wide areas.
When EM radiation at the frequences for which it is referred to as " radio waves " impinges upon a conductor, it couples to the conductor, travels along it, and induces an electric current on the surface of the conductor by moving the electrons of the conducting material in correlated bunches of charge.
When the umbra does not reach the surface of the Earth, the Sun is only partially occulted, resulting in an annular eclipse.
When wet, the oil tends to float to the surface of the roads making them very slippery and dangerous.
When swimming, the thorax would be weighed down by the front legs, making it difficult for the animal to move its neck and legs in harmony or keep its head above the surface.
When the cannon was fired through the touchhole, turbulence from the initial surface combustion caused the rest of the powder to be rapidly exposed to the flame.
When the stone hits the surface of the water, a circular pattern of waves appears.
When jewelry containing diamonds is heated ( for repairs ) the diamond should be protected with boracic acid ; otherwise the diamond ( which is pure carbon ) could be burned on the surface or even burned completely up.
When jewelry containing sapphires or rubies is heated, it should not be coated with boracic acid or any other substance, as this can etch the surface ; they do not have to be " protected " like a diamond.
When using an injection port, the syringe needle always stays above the surface of the skin, thus reducing the number of skin punctures associated with intensive insulinotheraphy.
When the surface glycosaminoglycan ( GAG ) layer is damaged ( via a urinary tract infection ( UTI ), excessive consumption of coffee or sodas, traumatic injury, etc.
When issues were thoroughly vetted, then the best ideas would bubble to the surface.
When a key is pressed, the foil tightly clings to the surface of the PC board, forming a daisy chain of two capacitors between contact pads and itself separated with thin soldermask, and thus " shorting " the contact pads with an easily detectable drop of capacitive reactance between them.
When cut open, lithium exhibits a metallic luster, but contact with moist air corrodes the surface quickly to a dull silvery gray, then black tarnish.
When depictions of lesbians began to surface, they were often one-dimensional, simplified stereotypes.
When this angle is exceeded, photons no longer penetrate the semiconductor but are instead reflected both internally inside the semiconductor crystal and externally off the surface of the crystal as if it were a mirror.
When full, a notable phenomenon is that around midday the lake surface can often become very flat.

When and is
When Heidegger and Sartre speak of a contrast between being and existence, they may be right, I don't know, but their language is too philosophical for me.
When they express themselves it is incandescent hatred that shines forth, the rage of repudiation, the ecstasy of negation.
When I try to work out my reasons for feeling that this passage is of critical significance, I come up with the following ideas, which I shall express very briefly here and revert to in a later essay.
When the proprietor dies, the establishment should become a corporation until it is either acquired by another proprietor or the government decides to drop it.
When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.
When I take over Taliesin, the first thing I'll do is fire you ''.
When someone in the audience rose and asked how does it feel to be a celebrity, Carl said, `` A celebrity is a fellow who eats celery with celerity ''.
When decision makers act within this frame they determine whether a claim put forward in the name of religion is to be accepted by the larger community as appropriate to religion.
When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.
When we turn to Aristotle's ideas on the moral measure of literature, it is at once apparent that he is at times equally concerned about the influence of the art.
When their faith in civil liberties is tested against strong pressures of social expediency in specific issues, e.g., suppression of `` dangerous ideas '', many waver and give in.
There is, of course, nothing new about dystopias, for they belong to a literary tradition which, including also the closely related satiric utopias, stretches from at least as far back as the eighteenth century and Swift's Gulliver's Travels to the twentieth century and Zamiatin's We, Capek's War With The Newts, Huxley's Brave New World, E. M. Forster's `` The Machine Stops '', C. S. Lewis's That Hideous Strength, and Orwell's Nineteen Eighty-Four, and which in science fiction is represented before the present deluge as early as Wells's trilogy, The Time Machine, `` A Story Of The Days To Come '', and When The Sleeper Wakes, and as recently as Jack Williamson's `` With Folded Hands '' ( 1947 ), the classic story of men replaced by their own robots.
When I first came across Samuel Johnson's pronouncement, `` the remedy for the ills of life is palliative rather than radical '', it seemed to me to sum up the profoundest of political and social truths.
When all else fails, it is argued that open sessions slow down governmental operations.
When a person has thoughtlessly or deliberately caused us pain or hardship it is not always easy to say, `` Just forget it ''.
When a person meets God's requirements for the experience of forgiveness he is forgiven.
When I hold my son he stiffens his whole body in my arms until he is as straight and stiff as a board.
When different colors are used, she is just as likely to color trees purple, hair green, etc..
When we become firm enough to stand for those ideals which we know to be right, when we become hard enough to refuse to aid nations which do not permit self-determination, when we become strong enough to resist any more drifts towards socialism in our own Nation, when we recognize that our enemy is Communism not war, and when we realize that concessions to Communists do not insure peace or freedom, then, and only then will we no longer be `` soft ''.
When one powerful nation strives to emulate the success of another, it is only natural.
When a man is laid to rest, he is entitled to stay put.
When I talked to Ching about it, he said, Everyone can learn, if he is not a Reactionary or lazy.

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