Field sensors factors

For an RF electric field sensor, bandwidth (speed) is another important requirement. The speed of a resonator is determined by the cavity ring down time r = QX/c. As in any devices using resonating structures, a trade off between sensitivity (which increases with Q) and speed (which decreases when Q increases) has to be made. At the wavelength of 1.55 pm, Q factors of 104 and 106 translates to a sensor bandwidths of 20 GHz and 200 MHz, respectively. 

When deploying field sensors, analysts must be aware of environmental factors that can potentially influence fluorescence measurements. Attributes of a given environment can be used to decide the ideal optical and sampling designs to yield high-quality fluorescence... 

Most spectrometers measure the magnetic field by a Hall effect probe consisting of a sensor mounted on one of the pole faces of the magnet. However, such estimates of the value of B inside the cavity are not sufficiently accurate to be used for g-factor determinations. There are two ways around this problem (i) measure the spectrum of a solid free radical such as dip-henylpicrylhydrazyl (DPPH), which has a well-known g-value (2.0028), at least once during acquisition of the desired spectrum or (ii) use of an NMR gaussmeter probe inserted in or near the cavity several times during the collection of the spectrum. 

It is also interesting to look into the future use of sensors in household appliances. An attempt to do this is made in Chapter 6 where the influence factors in this broad field are analyzed. These include socio-economic data of the end users (like age of the population) and their preferences (like savings of energy, water and detergents), ease of use and cost of ownership, as described in Chapter 6.1. One specific and interesting future development can be foreseen - the integration of home appliances into heretofore strictly separated areas, such as... 

Sufficiently cheap UV photodiodes are available but they are not visible-blind. Filters have to be used, but they raise the costs. Sufficiently selective photodiodes are also available but they are too expensive, mainly due to their only recently established technology. The sensor costs have been a limiting factor in two application fields of UV sensors, namely water disinfection and combustion monitoring, on the industrial as well as on the household scale. 

An extensive series of studies is conducted to investigate the effects of various weighting factors associated with the mechanical energy of the oscillatory field ((/), actuation energy (r), plant disturbance (a), and sensor noise (/ ) on the robustness and performance of the controller. Also included in the parametric investigation are the affordable bound of system dynamics uncertainty (I/7) and the maximum time delay of the distributed combustion of control fuel 5t). Results indicate that... 

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