Group

Group may refer to:

Groups of people

In science and technology

In mathematics

In chemistry

In computing and the internet

Other uses in science and technology

Other uses

Shot grouping

In shooting, a shot grouping, or simply grouping, is the placement of multiple shots on a target, the shots taken in one shooting session. The closeness of the grouping, the nearness of all the shots to each other, is a measure of the accuracy of a weapon, and a measure of the shooter's consistency and skill.

Uses of the term

For firearms that shoot one round at a time, a shot grouping can be used to measure the accuracy of the system comprised out of weapon as well as the precision and uniformity of the ammunition by fixing the weapon into position on a test mount, and aiming it at a target. Multiple shots using rounds from same type and batch are fired to observe how the weapon groups the shots. If a person holds the weapon and shoots it, the grouping measures the combination of the person's skill and the weapon's accuracy.

In shotgun shooting, the grouping is also called the pattern. The pattern is the spread of shot from a single shotgun shell, measured as the smallest circle containing all the shots on the target. The barrel of a shotgun is designed to deliver a wide or narrow grouping, depending on the expected use. Shooting at close range indicates a cylinder bore barrel to deliver a wide grouping, while for hunting at longer distances such as 50 yards or meters, a choke is recommended for a tighter grouping.

Stratigraphic unit

A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize it.

Units must be mappable and distinct from one another, but the contact need not be particularly distinct. For instance, a unit may be defined by terms such as "when the sandstone component exceeds 75%".

Lithostratigraphic units

Sequences of sedimentary and volcanic rocks are subdivided on the basis of their lithology. Going from smaller to larger in scale, the main units recognised are Bed, Member, Formation, Group and Supergroup.

Bed

A bed is a lithologically distinct layer within a member or formation and is the smallest recognisable stratigraphic unit. These are not normally named, but may be in the case of a marker horizon.

Member

A member is a named lithologically distinct part of a formation. Not all formations are subdivided in this way and even where they are recognized, they may only form part of the formation.

Campus (disambiguation)

A campus is the land on which an institution, either academic or non-academic, is located.

Campus may also refer to:

Places

SPARCstation 10

The SPARCstation 10 (codenamed Campus-2) is a workstation computer made by Sun Microsystems. Announced in May 1992, it was Sun's first desktop multiprocessor (being housed in a pizza box form factor case). It was later replaced with the SPARCstation 20.

Specifications

CPU support

The SPARCstation 10 (SS10) contains two MBus slots running at either 36 MHz (33 MHz for the earliest models) or 40 MHz (set via motherboard jumper). Each MBus slot can contain single or dual SPARC CPU modules, permitting expansion to up to four CPUs. Both SuperSPARC and hyperSPARC CPU modules were available. Single SuperSPARC modules without external cache were sold by Sun; they ran at the clock speed of the MBus (uniprocessor Models 20, 30 and 40; dual processor Model 402). Single and a few dual SuperSPARC modules with 1 MB external cache were also sold; they were independently clocked, and ran at a higher rate than the MBus, most commonly 40.3 MHz or 50 MHz (uniprocessor Models 41 and 51; multiprocessor Models 412, 512 and 514). Sun's dual 50 MHz SuperSPARC modules (the only dual MBus modules supported by Sun for this system) were double-width, physically occupying one SBus slot per module in addition to an MBus slot. SuperSPARC modules with and without external cache could not be mixed. SuperSPARC modules with external cache could be mixed, even with different clock speeds, but this was not a Sun-supported configuration.