A refractometer measures the extent to which light is bent (i.e. refracted) when it moves from air into a sample and is typically used to determine the index of refraction (aka refractive index or n) of a liquid sample.
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(INFANT INCUBATOR)
An infant incubator is used mainly to keep a baby’s core temperature stable at 37 degrees Celsius. Most incubators also humidify the air and can add extra oxygen.
(INFANT INCUBATOR WITH BABY)
NEED OF INFANT INCUBATORS
The phototherapy light shines light onto the baby’s skin. The light must be the correct wavelength (colour) and the correct intensity (brightness). It is used for treating a condition called Jaundice or Hyperbilirubinemia.
Jaundice or Hyperbilirubinemia
A hearing aid is a device used to help hard-of-hearing people hear sounds better. In the past, a funnel-like amplification cone, called an “ear trumpet” or “ear horn” was used. Also sometimes used was a desk with a built-in amplifier into which a microphone and earphones could be plugged; these worked better than passive ear trumpets but were not portable.
Microelectromechanical Systems (MEMS) is the technology of the very small, and merges at the nano-scale into “Nanoelectromechanical” Systems (NEMS) and Nanotechnology.
MEMS are also referred to as micro machines, or Micro Systems Technology (MST). MEMS are separate and distinct from the hypothetical vision of Molecular nanotechnology or Molecular Electronics.
(MEMS DEVICE)
MEMS generally range in size from a micrometer (a millionth of a meter) to a millimeter (thousandth of a meter). At these size scales, the standard constructs of classical physics do not always hold true. Due to MEMS’ large surface area to volume ratio, surface effects such as electrostatics and wetting dominate volume effects such as inertia or thermal mass. Finite element analysis is an important part of MEMS design.
There are two common classes of control systems, with many variations and combinations:
i.) logic or sequential controls, and feedback or linear controls.
ii.) fuzzy logic, which attempts to combine some of the design simplicity of logic with the utility of linear control.
Some devices or systems are inherently not controllable.
The term “control system” may be applied to the essentially manual controls that allow an operator to, for example, close and open a hydraulic press, where the logic requires that it cannot be moved unless safety guards are in place.