Tag Archives: Business

REFRACTOMETER-BASIC CLINICAL SCIENCES

: Image by Getty Images via Daylife

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 INCUBATORS

(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

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MICROELECTROMECHANICAL SYSTEMS (MEMS)

MEMS CHIPS

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 DEVICES
(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.

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CONTROL SYSTEMS

A control system is a device or set of devices to manage, command, direct or regulate the behaviour of other devices or systems. CLOSED LOOP CONTROL SYSTEM

There are two common classes of control systems, with many variations and combinations:

i.) logic or sequential controls, and feedback or linear controls.

FEEDBACK CONTROL SYSTEM

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.

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BIOSIGNAL

Biosignal is a summarizing term for all kinds of signals that can be (continually) measured and monitored from biological beings. The term biosignal is often used to mean bio-electrical signal but in fact, biosignal refers to both electrical and non-electrical signals.

Electrical biosignals (“bio-electrical” signals) are usually taken to be (changes in) electrical currents produced by the sum of electrical potential differences across a specialized tissue, organ or cell system like the nervous system. Thus, among the best-known bio-electrical signals are :