Specimen

Specimen may refer to:

Science

Printing

Other

Specimen (band)

Specimen are a British band formed in the 1980s. Their music has been described as spanning many different genres of music, including glam, goth, punk and post-punk, and the band is widely credited as one of the pioneers of the goth subculture, both musically and stylistically.

Early days

The band formed in Bristol, England by vocalist Olli Wisdom with guitarists John Klein (from Europeans) and Kevin Mills during 1980. Their first show was at a street party celebrating the wedding of The Prince of Wales and Lady Diana Spencer. In 1982, the band relocated to Soho, London, where Wisdom founded the infamous Batcave nightclub. Ian Astbury described Specimen's unique hybrid of punk and glam as being "like a Death Bowie."

When approached by Wisdom and asked to join Specimen, original keyboardist Jonny Slut initially declined because he could not play any instruments. Wisdom insisted and Slut eventually learned to play the keyboard by utilizing guiding stickers. Unusual for a keyboardist, Jonny Slut became the face of the band and its most famous member, due largely to his striking image and fashion sense. Among goths, he is often unofficially credited with inventing the deathhawk hairstyle.

Biological specimen

A biological specimen (also called a biospecimen) is a biological laboratory specimen held by a biorepository for research. Such a specimen would be taken by sampling so as to be representative of any other specimen taken from the source of the specimen. When biological specimens are stored, ideally they remain equivalent to freshly-collected specimens for the purposes of research.

Human biological specimens are stored in a type of biorepository called a biobank, and the science of preserving biological specimens is most active in the field of biobanking.

Quality control

Setting broad standards for quality of biological specimens was initially an underdeveloped aspect of biobank growth. There is currently discussion on what standards should be in place and who should manage those standards. Since many organizations set their own standards and since biobanks are necessarily used by multiple organizations and typically are driven towards expansion, the harmonization of standard operating procedures for lab practices are a high priority. The procedures have to be evidence-based and will change with time as new research and technology becomes available.

Product

Product may refer to:

Business

Sciences

Mathematics

In linear algebra:

In abstract algebra:

Product breakdown structure

In project management, a product breakdown structure (PBS) is a tool for analysing, documenting and communicating the outcomes of a project, and forms part of the product based planning technique.

The PBS provides ''an exhaustive, hierarchical tree structure of deliverables (physical, functional or conceptual) that make up the project, arranged in whole-part relationship'' (Duncan, 2015).

This diagrammatic representation of project outputs provides a clear and unambiguous statement of what the project is to deliver.

The PBS is identical in format to the work breakdown structure (WBS), but is a separate entity and is used at a different step in the planning process. The PBS precedes the WBS and focuses on cataloguing all the desired outputs (products) needed to achieve the goal of the project. This feeds into creation of the WBS, which identifies the tasks and activities required to deliver those outputs. Supporters of product based planning suggest that this overcomes difficulties that arise from assumptions about what to do and how to do it by focusing instead on the goals and objectives of the project - an oft-quoted analogy is that PBS defines where you want to go, the WBS tells you how to get there.

Product (category theory)

In category theory, the product of two (or more) objects in a category is a notion designed to capture the essence behind constructions in other areas of mathematics such as the cartesian product of sets, the direct product of groups, the direct product of rings and the product of topological spaces. Essentially, the product of a family of objects is the "most general" object which admits a morphism to each of the given objects.

Definition

Let C be a category with some objects X₁ and X₂. An object X is a product of X₁ and X₂, denoted X₁ × X₂, if it satisfies this universal property:

The unique morphism f is called the product of morphisms f₁ and f₂ and is denoted < f₁, f₂ >. The morphisms π₁ and π₂ are called the canonical projections or projection morphisms.

Above we defined the binary product. Instead of two objects we can take an arbitrary family of objects indexed by some set I. Then we obtain the definition of a product.

An object X is the product of a family (X_i)_i∈I of objects iff there exist morphisms π_i : X → X_i, such that for every object Y and a I-indexed family of morphisms f_i : Y → X_i there exists a unique morphism f : Y → X such that the following diagrams commute for all i∈I: