Photomultipliers are still commonly used wherever low levels of light must be detected.

Photomultipliers are constructed from a glass envelope with a high vacuum inside, which houses a photocathode, several dynodes, and an anode.

Photomultipliers with large distances between the photocathode and the first dynode are especially sensitive to magnetic fields.

* Photomultipliers are used in conjunction with scintillators to detect Ionizing radiation by means of hand held and fixed radiation protection instruments, and particle radiation in physics experiments.

* Photomultipliers are used in research laboratories to measure the intensity and spectrum of light-emitting materials such as compound semiconductors and quantum dots.

* Photomultipliers are used as the detector in many spectrophotometers.

* Photomultipliers are typically used as the detectors in Flying-spot scanners.

* Photomultipliers were the first electric eye devices, being used to measure interruptions in beams of light.

Photomultipliers offer the best possible opportunity to exceed the Johnson noise for many configurations.

The men who speculate on these institutions have, for the most part, come to at least one common conclusion: that many of the great enterprises and associations around which our democracy is formed are in themselves autocratic in nature, and possessed of power which can be used to frustrate the citizen who is trying to assert his individuality in the modern world ''.

Then, with staring eyes and lips drawn thin, Miriam said to the young woman, `` You are ugly -- uglier than you used to be, and you were always very ugly.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

The decision maker who acts for the community as a whole must decide whether the objectives pursued and the methods used are appropriate to public policy regarding cultural groups.

his broad but little used investigative powers are confirmed.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

One cannot help wondering whether Molotov and the rest of the `` anti-party group '' are not being used as China's whipping-boys by Khrushchev and his faithful followers.

Proceeds realized from these pageants are used by the Jaycees to help support their various youth, health, welfare and community betterment activities throughout the state.

Since conventional methods are insensitive at the low frequencies of these molecular transitions, the paramagnetic resonance method is being used instead.

The funds recouped by reductions in item 12 above are used: first, to increase the unadjusted allotments to the specified minimum in those States where the unadjusted allotment is less than the minimum allotment ( item 13 above ) ; ;

Solid concrete blocks, relatively heavy and dense, are used for this shelter.

If they are used, the walls and roof should be 10 inches thick to give the same protection as the 8-inch solid concrete blocks.

It is thick, much like an egg plant's skin, so that poison sprays, if they are used, present no hazard to the consumer.

Such locks are nearly always used where the switch points `` face '' oncoming traffic.

Derails -- mechanical track devices that actually guide the wheels off the rails if a train passes a `` stop '' signal -- are used in many instances.

However, some formulas are used more than others.

The compression ratio arrived at with the formula will be the same regardless of whether cubic inches or cubic centimeters are used.

The only way to determine the final combustion chamber volume when such pistons are used is by measuring it with liquid while the cylinder head is bolted to the cylinder block and the piston is in top dead center position.

Photos of Conference Rooms and the General Assembly Hall can be made when these rooms are not being used for meetings.

Besides flathead bronze screws, silicon bronze Stronghold nails ( made by Independent Nail & Packing Co., Bridgewater, Mass. ) are used extensively in assembly and Weldwood resorcinol glue is used in all the joints.

After the frames and transom are set up on the jig and temporarily braced, a piece of three-inch-wide mahogany ( only widths will be given since the 13/16-inch thickness is used throughout ) is butted between frames one and two below the line of the keelson.

One-inch, No. 10 screws are used in both cases.

Glue and 1-1/2-inch, No. 10 screws are used.

Four pieces are used.

Because Bright's speeches were so much a part of him, there are long and numerous quotations, which, far from making the biography diffuse, help to give us the feel of the man.

The novels and stories like Pohl's Drunkard's Walk ( 1960 ), with the focus on adventure and with the dystopian elements only a dim background -- in this case an uneasy, overpopulated world in which the mass of people do uninteresting routine jobs while a carefully selected, university-trained elite runs everything -- are in all likelihood as numerous as dystopias.

They are written by specialists in numerous types of business enterprises, cover a wide range of subjects, and are directed to the needs and interests of the small firm.

Taxation of tangible movable property in Rhode Island has been generally of a `` hands off '' nature due possibly to several reasons: ( 1 ) local assessors, in the main, are not well paid and have inadequate office staffs, ( 2 ) the numerous categories of this component of personal property make locating extremely difficult, and ( 3 ) the inexperience of the majority of assessors in evaluating this type of property.

There are numerous types and styles of tools to drill holes.

The most distal airways are similar to those found in type 1,, being composed of numerous, apparently true terminal bronchioles and occasional, poorly developed respiratory bronchioles ( figs. 14, 15 ).

The possibilities in the consonantal system are very numerous, and only a small portion of them are actually used.

The internal losses are due to absorption and the small but finite losses suffered in the numerous internal reflections due to deviations from the prescribed, cylindrical fiber cross-section and minute imperfections of the core-jacket interface.

Today's earthquakes are most numerous in belts where the earth's restlessness is presently concentrated, but scars of the past show that there is no part of the earth that has not had them.

Despite the sheer beauty and spectacle of numerous documentaries, art films, and travelogues, despite the impressive financial success of such a recent development as Cinerama, the movies are at heart a form of fiction, like the play, the novel, or the short story.

The reasons for this enchantment are numerous, but most of them end in `` ova '', `` eva '', or `` aya ''.

Now, not only are there considerably more laity as students and professors at Oxford, but there are also numerous houses of religious orders existing in respectable and friendly relations with the non-Catholic members of the University.

Mr. Sansom is English, bearded, formidably cultivated, the versatile author of numerous volumes of short stories, of novels and of pieces that are neither short stories nor travel articles but something midway between.

That animals and humans are more altruistic towards close kin than to distant kin and non-kin has been confirmed in numerous studies across many different cultures.

The difference is not a formal one taxonomically and there are numerous exceptions to this rule.

The sub-umbellate inflorescences are borne at the end of long stems, having numerous bright red flowers, which are radially symmetric with inferior ovaries.

Most of the shores are densely wooded and are marked by numerous small towns and villages.

The seaside town of Ayvalık and numerous towns in the provinces of İzmir and Aydın are particularly famous for their olive oil and related products ; such as soap and cosmetics.

Although MND refers to a specific subset of pathologically similar diseases ; there are numerous other afflictions of motor neurons that are pathologically distinct from MND and have a different clinical course.