Rapid response

The more effective deflvery of natural gas is being realized by the use of computerized operation centers that allow rapid responses to the variations ia gas demand. Automated valves, more precise measuting systems, and high speed communication networks make it possible to closely monitor and manage the transmission and deflvery of natural gas. This translates iato improved service and cost effectiveness. 

The Imass Dynastat (283) is a mechanical spectrometer noted for its rapid response, stable electronics, and exact control over long periods of time. It is capable of making both transient experiments (creep and stress relaxation) and dynamic frequency sweeps with specimen geometries that include tension-compression, three-point flexure, and sandwich shear. The frequency range is 0.01—100 H2 (0.1—200 H2 optional), the temperature range is —150 to 250°C (extendable to 380°C), and the modulus range is 10" —10 Pa. 

DiaZepin Nucleosides. Four naturally occurring dia2epin nucleosides, coformycin (58), 2 -deoxycoformycin (59), adechlorin or 2 -chloro-2 -deoxycoformycin (60), and adecypenol (61), have been isolated (1—4,174,175). The biosynthesis of (59) and (60) have been reported to proceed from adenosine and C-1 of D-ribose (30,176,177). They are strong inhibitors of adenosine deaminase and AMP deaminase (178). Compound (58) protects adenosine and formycin (12) from deamination by adenosine deaminase. Advanced hairy cell leukemia has shown rapid response to (59) with or without a-or P-interferon treatment (179—187). In addition, (59) affects interleukin-2 production, receptor expression on human T-ceUs, DNA repair synthesis, immunosuppression, natural killer cell activity, and cytokine production (188—194). 

Moreover, the receptrode has an extremely rapid response time, requiring only two to three milliseconds to fully respond to a target concentration change. The response times of conventional chemical sensors (qv) are typically from several seconds to several minutes. The receptrode exhibits a response that follows the empirical relationship... 

With respect to their response, the discussion should emphasize why these are important anci why they adjust certain control settings. Among the deviations on which analysts should focus the discussion are the high and low alarm settings. Some alarms will require rapid response. Alarms may give insight into equipment-operation boundaries as well as process constraints. 

Fig. 4-1. The same atmosphere measured by (a) a rapid-response irvstrument and by sampling and analytical procedures that integrate the concentration arriving at the receptor over a time period of (b) 15 min, (c) 1 hr, and (d) 6 hr.

The averaging time of the rapid-response record [Fig. 4-1 (a)] is an inherent characteristic of the instrument and the data acquisition system. It can become almost an instantaneous record of concentration at the receptor. However, in most cases this is not desirable, because such an instantaneous record cannot be put to any practical air pollution control use. What such a record reveals is something of the turbulent structure of the atmosphere, and thus it has some utility in meteorological research. In communications... 

The immune system in vertebrates provides a defense mechanism against foreign parasites such as viruses and bacteria. Three main properties are essential to its successful operation specific recognition of foreign molecules, the ability to destroy the foreign parasite, and a memory mechanism that allows a more rapid response to a second infection by the same microorganism. 

Since the Bulk Modulus of hydraulic oil is in the order of 1.4 GPa, if m and F[ are small, a large hydraulic natural frequency is possible, resulting in a rapid response. Note that the hydraulic damping ratio is governed by Cp and A c. To control the level of damping, it is sometimes necessary to drill small holes through the piston. 

Equation (8.157) shows that the desired elosed-loop poles for the eontrol system are not ehanged by the introduetion of the state observer. Sinee the observer is normally designed to have a more rapid response than the eontrol system with full order observed state feedbaek, the pole-plaeement roots will dominate. 

If the information collected as you develop the lAQ profile indicates that you have one or more lAQ problems, prioritize these problems by considering the apparent seriousness of their consequences. For example, combustion gas odors demand a more rapid response than thermostats that are out of calibration. 

Establish actual relieving pressure (and corresponding temperature) from Figure 7-7A (at 110% of set pressure for non-fire and non-explosive conditions). Explosive conditions may require total separate evaluation of the set pressure never above the MAWP), which should be lower or staged or, most likely, will not be satisfied by a standard SRV due to the extreme rapid response needed. 

Once commissioned, even the best-planned industrial development requires monitoring and management to ensure that its operation continues to be environmentally acceptable. This applies equally to established industries. When unexpected environmental problems develop, a rapid response is required to assess the cause and magnitude of the problem and to devise remedial measures. 

May be used on high-temperature hot water or low-pressure steam without casing temperature becoming dangerously high fairly rapid response to conhol. 

Forced convective Far convectors These units give a high heat output for volume of space occupied by the unit, together with the ability to distribute the heat over a considerable area using directional grilles. May be used to bring in heated fresh air for room ventilation. Rapid response to conhol by individual thermostat. By use of variable speed motors rapid warm-up available in intermittent systems Altered fresh air inlet facility. Electric supply required to each individual unit. 2 to 25 kW. 

Unit heaters A unit with a large propeller or cenhifugal fan to give high air volume and wide throws. Louvers direct the air flow in the direction required. May be ceiling mounted, discharging vertically or horizontally or floor mounted. Can be used with fresh air Rapid response to conhol by individual thermostat by use of multi-speed motors rapid warm-up available on intermittent systems Altered fresh air inlet facility. Electric supply required for each individual unit. 3 to 300 kW. 

J-G. Beverlock et al, Rapid Response Scheduling System (RRS) for the Holston Army Ammunition Plant , PATR 4461 (1973)... 

The stopped-flow and quenched-flow methods for fast reactions involve the fast flowing together of separate solutions of the reactants. This rapid mixing can be coupled to a rapid-response method for monitoring the progress of the reaction. With such methods one can determine rate constants up to about 5 X 102 s 1 (i.e., t n > 1 ms). The instrumentation for stopped-flow kinetics is readily available commercially. With special adaptations, one can gain another one or two orders of magnitude. 

Environmental benefits of Emission Controls. Information in Figure 5 illustrate that the emission of sulphur in eastern North America has declined over the past decade. This decline allows for a possible verification of the dose-response relationships on which the environmental concerns for emissions have been based. A decline in sulphate deposition in Nova Scotia has apparently resulted in a decrease in acidity of eleven rivers over the period 1971-73 to 1981-82 (47), In the Sudbury, Ontario area where emissions have dechned by over 50% between 1974-76 and 1981-83, a resurvey of 209 lakes shows that most lakes have now become less acidic. Twenty-one lakes that had a pH < 5.5 in 1974-76 showed an average decline in acidity of 0.3 pH units over the period (48), Surveys of 54 lakes in the Algoma region of Ontario have shown a rapid response to a decline in sulphate deposition. Two lakes without fish in 1979 have recovered populations as pH of the water moved above 5.5 (49). Evidence is accumulating to support the hypothesis of benefits that were projected as a consequence of emission controls. This provides increased confidence in the projections. 

Paetzold A, Bemet J, Tockner K (2006) Rapid response of riparian arthropods to aquatic subsidy pulses. Freshw Biol 51 1103-1115... 

From the above, derives the fundamental concept that the newborn infant must be maintained in an adequate degree of hydration and in electrolyte balance in order for the infant to thrive. In some cases, where for one reason or other, the infant is not able to take fluids by mouth in the normal manner, one may need to resort to supplementary fluid therapy by vein. For a rational approach to this problem one needs to have available from the clinical chemical laboratory> rapid response in order to continuously monitor changes in electrolyte levels so that fluids can be modified so as to correct these abnormal-ities. 

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