Ventilators are typically used by ALS patients having difficulty breathing. There are several kinds of non-invasive ventilators, such as small devices that fit over the nose and mouth. Patients may also opt for a tracheostomy, a surgical procedure in which a tube is placed into the throat.
3. Counters. A counter is a digital sequential logic device that will go through a certain predefined states (for example counting up or down) based on the application of the input pulses. They are utilized in almost all computers and digital electronics systems [1].
Standard Countertop Dimensions. Also known as a worktop or a benchtop, a countertop is a horizontal work area commonly installed in food preparation rooms. This structure is usually installed above cabinets. Some of the materials that are used for this structure are wood, tile, natural stone and crafted glass.