Characters per second

TELENET, or TYMNET at 30, 120, 240, or 960 character per second transmission speed. In addition, one also needs an EIA compatible (within the United States) or CCITT-compatible (non-U.S.) modem for dial-up. 

Teletype. The Teletype is an ASR-33, with a printing speed of 10 characters per second. All user communication, including output, in the basic system is implemented through the Teletype. 

Daisy-wheel printers were one of the first types of impact printer developed. Their speed is rated by the number of characters per second (cps) they can print. The early printers could only print between two and four characters per second. Aside from their poor speed, the main disadvantage to this type of printer is that it makes a lot of noise when printing—so much, in fact, that special enclosures were developed to contain the noise. 

The initial problem in this project involved the hardware configuration. Previous experience with "dumb" terminal graphics systems operating over telephone lines at 120 characters per second had indicated that the responsiveness of such systems would never be adequate in terms of both entry throughput and user patience unintelligent terminals controlled by a central processor would require an inordinate number of data-input personnel because of the slowness of data throughput and because of poor productivity arising from frustration with lack of system responsiveness. 

Video screen terminals were not widely available in 1964. The only alternative was the Teletype Model 33. It typed in uppercase only and was very slow—10 characters per second. The line numbers of a BASIC program allowed users to change the program without retyping the entire program they needed merely to retype the corrected line, including the line number. 

Select a polymeric material from which to make a da%wheel for a computer printer. The dai heel will have an overall diameter of 70 mm, and consist of 56 individual arms, each 22 mm length, radiating from a central hub. Printing speeds will be approximate 30 characters per second. In what ways can the correct choice of material and production process help to meet the special requirements for stiffness, strength, and low inertia inherent in this application ... 

Some of the vinyl monomers polymerized by transition metal benzyl compounds are listed in Table IX. In this table R represents the rate of polymerization in moles per liter per second M sec-1), [M]0 the initial monomer concentration in moles per liter (M) and [C]0 the initial concentration of catalyst in the same units. The ratio i2/[M]0[C]0 gives a measure of the reactivity of the system which is approximately independent of the concentration of catalyst and monomer. It will be observed that the substitution in the benzyl group is able to affect the polymerization rate significantly, but the groups that increase the polymerization rate toward ethylene have the opposite effect where styrene is concerned. It would also appear that titanium complexes are more active than zirconium. The results with styrene and p-bromostyrene suggests that substituents in the monomer, which increase the electronegative character of the double bond, reduces the polymerization rate. The order of reactivity of various olefinically unsaturated compounds is approximately as follows ... 

The critical nucleus of a new phase (Gibbs) is an activated complex (a transitory state) of a system. The motion of the system across the transitory state is the result of fluctuations and has the character of Brownian motion, in accordance with Kramers theory, and in contrast to the inertial motion in Eyring s theory of chemical reactions. The relationship between the rate (probability) of the direct and reverse processes—the growth and the decrease of the nucleus—is determined from the condition of steadiness of the equilibrium distribution, which leads to an equation of the Fourier-Fick type (heat conduction or diffusion) in a rod of variable cross-section or in a stream of variable velocity. The magnitude of the diffusion coefficient is established by comparison with the macroscopic kinetics of the change of nuclei, which does not consider fluctuations (cf. Einstein s application of Stokes law to diffusion). The steady rate of nucleus formation is calculated (the number of nuclei per cubic centimeter per second for a given supersaturation). For condensation of a vapor, the results do not differ from those of Volmer. 

Reflect and i ply . coli incorporates deoxyribonucleotides into DNA at a rate of 250 to 1000 bases per second. Using the higher value, translate this into typing speed in words per minute. (Assume five characters per word, using the typing analogy from Question 32.)... 

These are the well-established proportionalities for the radiant power measured with a CS. Because of the statistical character of the mean photon flux per second n = 4> / hc), the standard deviation of n, observed during a time interval t, equals v. The minimum detectable reduction of n during observing time t, corresponding to a detectable decrease in the radiant power, is defined as ... 

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