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].
If you love the look of marble â and it is beautiful â consider installing marble counters in locations other than the kitchen. They offer beauty and good longevity when they are treated with the care they require. 1  Pros and Cons of Granite Kitchen Countertops. 2  Pros and Cons of Concrete Countertops.  Pros and Cons of Wood Countertops.