OSAC Lexicon

An impression formed under wet conditions including impressions consisting of residues of blood, grease, mud and other wet substances.

An impression formed under wet conditions including impressions consisting of residues of blood,grease, mud and other wet substances.

WGS 84 is the World Geodetic System of 1984. At 0000 GMT September 30, 1996 (thestart of GPS Week 873), WGS 84 was redefined and was more closely aligned withInternational Earth Rotation Service (IERS) Terrestrial Reference Frame (ITRF) 94. It isnow formally called WGS 84 (G873). WGS 84 (G873) was adopted as the referenceframe for broadcast orbits on January 29, 1997.

The distance between the front and rear axles of a vehicle. An approximation of this dimension can be obtained by measuring the distance from the leading edge of the rear tire track to the leading edge of the front tire track on the same side of the vehicle.

Giving birth to a puppy

Giving birth to a puppy.

Equipment used to produce white light (e.g., flash light) to visualize potential items of evidence.

Distractor odors that are naturally occurring in the search environment that are not placed by evaluators, observers or participants. Animal remains that were not placed by someone, holes that were dug by wild animals, feces from other animals, etc. (See natural distractors.)

material that, by capillary action, draws up a supply of ignitable liquid or oil to be burned, as in a candle or Molotov cocktail. Discussion—Examples of wick material can include cloth, paper towels, or cordage.

To locate target odor/scent sources in a rural environment.

There are several proprietary formats developed by Microsoft. Windows Media Video(WMV) was developed for Internet streaming applications. Windows Media Audio(WMA) has four distinct codecs: WMA Pro, WMA Lossless, WMA Voice and theoriginal codec also referred to as WMA. The Advanced Systems Format (.asf) is acontainer format designed for streaming media. The Advanced Stream Redirector(ASX) is a type of XML designed to store a playlist for a multimedia presentation.

A computer system that uses dental and anthropometric characteristics to rank possiblematches for missing persons and unidentified human remains.

An altered stain resulting from an object moving through a preexisting wet bloodstain.

Revocation or cancellation of a statement of conformity.

Windows Media Audio. This refers to both a Microsoft proprietary audio file format and the audio codecs it uses.WMA can use either lossy or lossless codecs.

a copy of a recording or data that can be used for subsequent processing or analysis or both.

An outline of the tasks to be completed as part of the investigation including the order or timeline for completion. Planning the Investigation.

distance between the final aperture and the specimen.

The range of concentration that can be adequately determined by an instrument, where the instrument provides a useful signal that can be related to the concentration of the analyte

a structure produced when at least two sets of strands are interlaced, usually at right angles to each other, according to a predetermined pattern of interlacing, and such that at least one set is parallel to the axis along the lengthwise direction of the fabric.

to prevent the content of storage media from being modified.

a hardware or software method, or both that prevents the modification (addition, deletion, or alteration) of media content.

Acronym for Wavelet Scalar Quantization, a compression algorithm used for 500 ppifriction ridge prints.

the diffraction of a beam of X-rays, usually by the three-dimensional periodic array of atoms in a crystal that has periodic repeat distances (lattice dimensions) of the same order of magnitude as the wavelength of the X-rays.

the characteristic interference pattern obtained when X-rays are diffracted by a crystalline substance; the geometry of the pattern is a function of the repeat distances (lattice dimensions) of the periodic array of atoms in the crystals; the intensities of the diffracted beams give information about the atomic arrangement, and unit-cell dimensions.

diffraction of a beam of X-rays by planes of atoms in a powdered crystalline sample; the powders are prepared so they ideally represent all possible crystal orientations to the X-ray beam.

Extensible Markup Language. A convention for marking up and tagging data forelectronic transmission. An XML package is built from text content marked up with texttags such as . In XML one can create as many tags as needed.These tags describe the type of content they contain rather than formatting or layoutinformation. The types of tags allowed in an XML file are typically defined andconstrained by a specification such as an XML Schema Definition (XSD).

X3P is an open file format for the exchange of three dimensional surface topography data instandard units. Details are specified in ISO 25178-72.

Short tandem repeat markers found on the Y-chromosome that enable male-specific DNA testing and can be useful in cases involving sexual assault; variations in Y-STRs may be used for distinguishing individuals, and in biological relationship and ancestry testing.

a generic term for a continuous strand of textile fibers, filaments, or material in a form suitable for knitting, weaving, or otherwise intertwining to form a textile fabric. Discussion—For the purposes of this guide, yarn refers to lengths of fiber reinforcement (for example, twisted staple fibers, filament fibers).

a generic term for a continuous strand of textile fibers, filaments, or material in a form suitable for knitting, weaving, or otherwise intertwining to form a textile fabric.

In facial identification, an intrinsic rotation of the head about a vertical (longitudinal) axis measured in degrees. Discussion—Frontal poses have a yaw angle of 0°. Positive angles represent faces looking to their left (a counter-clockwise rotation around the axis). The yaw axis is typically defined as the Y-axis (positive up).

the quantity of material or the percentage of theoretical yield anticipated at any appropriate phase of production based on previous laboratory, pilot scale, or manufacturing data.

the quantity that would be produced at any appropriate phase of production based upon the quantity of material to be used, in the absence of any loss or error in actual production.

A disease communicable from vertebrate animals to humans.