Controllability and observability are main issues in the analysis of a system before deciding the best control strategy to be applied, or whether it is even possible to control or stabilize the system.

Controllability is an important property of a control system, and the controllability property plays a crucial role in many control problems, such as stabilization of unstable systems by feedback, or optimal control.

* Controllability: the dialogue is controllable when the user is able to initiate and control the direction and pace of the interaction until the point at which the goal has been met.

Controllability and observability are dual aspects of the same problem.

This arrangement was for Copernicus literally monstrous: `` With ( the Ptolemaists ) it is as though an artist were to gather the hands, feet, head and other members for his images from divers models, each part excellently drawn, but not related to a single body ; ;

On the other hand, the bright vision of the future has been directly stated in science fiction concerned with projecting ideal societies -- science fiction, of course, is related, if sometimes distantly, to that utopian literature optimistic about science, literature whose period of greatest vigor in the late nineteenth and early twentieth centuries produced Edward Bellamy's Looking Backward and H. G. Wells's A Modern Utopia.

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.

The theme of The Walnut Trees Of Altenburg is most closely related to its immediate predecessor in Malraux's array of novels: Man's Hope ( 1937 ).

Lawrence Ferlenghetti and Bruce Lippincott have concentrated on writing a new poetry for reading with jazz that is very closely related to both the musical forms of jazz, and the vocabulary of the musician.

Closely related to his illusions about his typicality is Krim's complicated feeling about his Jewishness.

In view of the increasing shortage of usable surface and ground water in many parts of the Nation and the importance of finding new sources of supply to meet its present and future water needs, it is the policy of the Congress to provide for the development of practicable low-cost means for the large-scale production of water of a quality suitable for municipal, industrial, agricultural, and other beneficial consumptive uses from saline water, and for studies and research related thereto.

Prior to and since 1960 the rest of the support allotment is matched at rates related to the fiscal capacity of the State, with a pivot of 40% State ( or 60% Federal ) participation in total program costs.

These roads are largely of less than highway standards, and usually carry traffic which is related to use of the National Forests.

New obligational authority for 1961 recommended in this budget for aircraft procurement ( excluding amounts for related research and construction ) totals $4,753 million, which is $1,390 million below that enacted for 1960.

At that time consideration will be given to whether in the light of the United States supplies of rice available for Title 1, disposal, India's production, consumption and stocks of food grains, other imports from the United States and countries friendly to the United States, India's storage capacity, and other related factors, any increase would be possible in the portion of the total rice programmed which is currently planned for procurement during the first year.

Shape of the area is also related to the use attractions and needs of the development.

Every single problem touched on thus far is related to good marketing planning.

Such an instrument is expected to be especially useful if it could be used to measure the elasticity of heavy pastes such as printing inks, paints, adhesives, molten plastics, and bread dough, for the elasticity is related to those various properties termed `` length '', `` shortness '', `` spinnability '', etc., which are usually judged by subjective methods at present.

Although the Af calculation is obvious by analogy with that for gravitational field and osmotic pressure, it is interesting to confirm it by a method which can be generalized to include related effects.

Although there is no question but that the process of washing fabrics involves a number of phenomena which are related together in an extremely complicated way and that these phenomena and their interrelations are not well understood at the present, this section attempts to present briefly an up-to-date picture of the physical chemistry of washing either fabrics or hard surfaces.

This `` ejection '' momentum is linearly related to the particle energy.

The mass scale used in Table 5-1 was derived on the assumption that the motion of the glowing trail is related to the momentum transfer to the trail by the meteorite, permitting the calculation of the mass if the velocity is known ( Cook and Whipple, 1958 ).

Furthermore, conditioned reactions are fundamentally altered when the hypothalamic sympathetic reactivity is augmented beyond a critical level, and several types of behavioral changes probably related to the degree of central autonomic `` tuning '' are observed.

Several related tasks must be carried out if self-sustaining growth is to be achieved.

Closely related to this function is the fact that the religious system provides a body of ultimate ends for the society, which are compatible with the supreme eternal ends.

However, there is always the possibility that chance will make demands the dancers find impossible to execute.

There is still the remote possibility of planetoid collision.

This is done for simplicity of commands and to bring the hidden redundancy up to where misunderstanding has almost zero possibility.

but the possibility of this effort is bound up with that development of historical thought which is the greatest achievement of our civilization in the last two centuries, and it is utterly impossible to people in whom this development has not taken place.

This prospect did not please Mrs. King any more than did the possibility that her daughter might marry a Bohemian, but she used it to suggest to Thompson that, `` It is not in her nature to love you ''.

Had U.S. warships not appeared off the Dominican coast, there is every possibility that the country would now be wracked by civil war.

Pauling's estimate of 200 megatons yield from the present series of Russian tests will probably turn out to be too high, but a total of 100 megatons is a distinct possibility.

The possibility, as he asserted, that the Russians may get ahead of us or come closer to us because of their tests does not supply the needed ethical premise -- unless, of course, we have unwittingly become so brutalized that nuclear superiority is now taken as a moral demand.

The possibility of recall into the Army is part of the price that a modern American has to pay for the enviable heritage of liberty which he enjoys.

This possibility is anything but reassuring.

There is a possibility that battery-powered radios with built-in radiation meters may become available.

It is not a medieval mental quirk or an attitude `` unnourished by sense '' to believe that husbands and wives should not be subjected to such a risk, or that such a possibility should not be permitted to endanger the confidentiality of the marriage relationship.

This result suggests a very high temperature at the solid surface of the planet, although there is the possibility that the observed radiation may be a combination of both thermal and non-thermal components and that the observed spectrum is that of a black body merely by coincidence.

There is, then, the possibility that this Af bond is symmetric, although Douglass was unable to determine its symmetry from his x-ray data.

The possibility that the absence or presence of these shunts is species-dependent is therefore inferred.

This contradicts the preceding observations, and so, under the assumption of this paper, we must reject the possibility that **zg is a Af curve on a quadric surface.

There is also the possibility, among higher religions, of experiencing consistent meaning in life and enjoying guidance and expansiveness.

In theory, compulsive behavior is a way of diminishing anxiety, and one might expect a negative association except for the possibility that for many children the obsessive-compulsive defenses are not sufficient to quell the amount of anxiety they suffer.

A further possibility is suggested by the example of the G. I. bills and also by some recent trends in attitudes toward improving college education: that is to provide financial assistance to individuals for vocational training when local facilities are inadequate.