Types of externalist foundationalism include reliabilism ( although not all reliabilists are foundationalists ) and Reformed epistemology.

The practice persists in 28 African countries, as well as in the Arabian Peninsula, where Types I and II are more common.

As with all alkali metals, lithium fires are difficult to extinguish, requiring dry powder fire extinguishers, specifically Class D type ( see Types of extinguishing agents ).

Types C and D are considered phosphodiesterases.

Naturally occurring restriction endonucleases are categorized into four groups ( Types I, II III, and IV ) based on their composition and enzyme cofactor requirements, the nature of their target sequence, and the position of their DNA cleavage site relative to the target sequence.

Types of spectroscopy are distinguished by the type of radiative energy involved in the interaction.

Types of speed skating are long track speed skating, short track speed skating, and marathon speed skating.

Types which fall in the form of a ball due to melting and refreezing, rather than a flake, are known as graupel, ice pellets or snow grains.

Such vehicles are required to display an STGO ( Special Types General Order ) plate on the front of the tractor unit and, under certain circumstances, are required to travel by an authorised route and have an escort.

Providing certain requirements are fulfilled, a Special Types General Order ( STGO ) allows for vehicles of any size or weight to travel on UK roads.

Types of intracranial hemorrhage are roughly grouped into intra-axial and extra-axial.

Types 1 through 4 are defined in the National Information Assurance Glossary ( CNSSI No. 4009 ) which defines Type 1, Type 2, Type 3, and Type 4 products and keys.

The characteristic effects of a neurosis on the dominant and inferior functions are discussed in Psychological Types.

Types of clerics are distinguished from offices, even when the latter are commonly or exclusively occupied by clerics.

Types of effects that are commonly used include: flying effects, laser lighting, Theatrical smoke and fog, CO2 effects, pyrotechnics, confetti and other atmospheric effects such as bubbles and snow.

Types 65, 80, and 110 are strong bread flours of increasing darkness, and type 150 is a wholemeal flour.

Types of sugar are lactose, glucose, fructose, and sucrose.

Types of cells that are found in the hypodermis are fibroblasts, adipose cells, and macrophages.

Types 1 and 2 are the most commonly recycled.

Types include both stock characters and those that are more fully individualised.

Types of fruits are described and defined elsewhere ( see Fruit ), but would include " fruit " in a culinary sense, as well as some nut-bearing trees, such as walnuts.

* Single-ended output stages ( be they tube or transistor ) have an asymmetrical transfer function, meaning that even order harmonics in the created distortion tend not to be canceled ( as they are in push – pull output stages ); by using tubes OR FETs most of the distortion is from the square law transfer characteristic and so second-order, which some consider to be " warmer " and more pleasant.

FETs are unipolar transistors as they involve single-carrier-type operation.

FETs are majority-charge-carrier devices.

The body terminal and the source terminal are sometimes connected together since the source is also sometimes connected to the highest or lowest voltage within the circuit, however there are several uses of FETs which do not have such a configuration, such as transmission gates and cascode circuits.

Most FETs are made with conventional bulk semiconductor processing techniques, using a single crystal semiconductor wafer as the active region, or channel.

Such FETs are manufactured using variety of materials such as silicon carbide ( SiC ), gallium arsenide ( GaAs ), gallium nitride ( GaN ), and indium gallium arsenide ( InGaAs ).

These transistors are capable of a 100 GHz cutoff frequency, much higher than standard silicon FETs.

In FETs electrons can flow in either direction through the channel when operated in the linear mode, and the naming convention of drain terminal and source terminal is somewhat arbitrary, as the devices are typically ( but not always ) built symmetrically from source to drain.

In practice, the gates are made from field-effect transistors ( FETs ), particularly MOSFETs ( metal – oxide – semiconductor field-effect transistors ).

FETs are divided into two families: junction FET ( JFET ) and insulated gate FET ( IGFET ).

Metal – semiconductor FETs ( MESFETs ) are JFETs in which the reverse biased p-n junction is replaced by a metal – semiconductor junction.

FETs are further divided into depletion-mode and enhancement-mode types, depending on whether the channel is turned on or off with zero gate-to-source voltage.

Most modern audio amplifiers are based on solid state devices ( transistors such as BJTs, FETs and MOSFETs ), but there are still some who prefer tube-based amplifiers, and the valve sound.

An integrated circuit made in CMOS is not a TTL chip since it uses field-effect transistors ( FETs ) and not bipolar junction transistors, but similar part numbers are retained to identify similar logic functions and electrical ( power and I / O voltage ) compatibility in the different subfamilies.

However, the traversing carriers hugely outnumber their opposite type in the transfer region ( in fact, the opposite type carriers are removed by an applied electric field that creates an inversion layer ), so conventionally the source and drain designation for the carriers is adopted, and FETs are called " majority carrier " devices.

The efficiency has increased since the late 1980s due to the use of power FETs, which are able to switch at high frequency more efficiently than power bipolar transistors, which incur more switching losses and require a more complicated drive circuit.

Classified by the properties of the carrier, three types of FETs are shown schematically in Figure 1.