The Microscopic Examination of Glass Surfaces

Elliott, Brendan; Goodwin, David G.; Hamer, P.S.; Hayes, P.M.; Underhill, Mark; Locke, John

doi:10.1016/s0015-7368(85)72434-6

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…This feature of float glass provides a very useful means for establishing a constant side. 6 This physical feature, unavailable to us, otherwise reduces considerably the number of trial joins for a mechanical fit of the joint edges.…”

Section: Features Of Glass Fracture Topographymentioning

confidence: 99%

Computer-assisted system for the reconstruction of shattered objects

Cooper

Brenningmeyer

2005

SPIE Proceedings

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Reconstruction for forensic purposes of shattered or otherwise damaged objects has been a painstaking, if not impossible, undertaking. The forensic crime scientist and the archaeologist share this challenge. A pilot project, funded by the National Institute of Justice experimented with several avenues of approach to this problem of reassembly by using the 627 fragmented pieces of a pane of glass from a crime scene. I was approached by staff members of the Forensic Laboratory of the Minnesota Bureau of Criminal Apprehension because I was developing a means to restore a Greek Bronze Age wall painting (ca. 1350 B.C.E.) fragmented into 4750 pieces and a Greek temple (ca. 150 B.C.E.) demolished by vandals about 1500 years ago, leaving behind 1485 stone blocks, 1-3 tons each. The challenge was to develop an automated method to rapidly and effectively analyze a quantity of fragments of like kind separated one from the other and from the original object by violence and other means. The project established a set of mathematically and graphically definable characteristics held by the glass sherds which allowed for the making of joins between pieces. Preparation included the formulation of inventory check-sheets and a barcode label system with a unique identifier for each piece based on a x,y,z grid system. The next step involved experimentation with an array of proprietary GIS, SQL, and CAD software alternatives for the processing of data. In the end we settled on maximum likelihood analysis of SQL filtered results. This and shape indices were complied using ArcView and the scripting language, Avenue, products of ESRI, Redlands, California.

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Section: Features Of Glass Fracture Topographymentioning

confidence: 99%

Computer-assisted system for the reconstruction of shattered objects

Cooper

Brenningmeyer

2005

SPIE Proceedings

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“…Detecting original or float surfaces is relatively straight-forward and a number of researchers (Lloyd, 1981;Locke & Zoro, 1983;Locke & Elliott, 1984;Elliot et al, 1985) have proposed and implemented quite reliable techniques for doing so. The float surface is enriched by tin oxide-which is part of the float glass manufacturing process.…”

Section: Departures From Normalitymentioning

confidence: 99%

The Statistical Interpretation of Forensic Glass Evidence

Curran

2003

Int Statistical Rev

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When examining a sample of glass fragments recovered from a suspect in a forensic case, many questions arise: "Did this man break that window?", "Are these fragments from the crime scene source?", "Do the fragments recovered from the suspect come from more than one source?", "How common is it to find glass on someone unrelated with crime?" etc. Such questions are usually answered with the help of statistical methods. This paper reviews some of the statistical solutions and problems encountered in the interpretation and evaluation of forensic glass evidence.

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“…When a glass is broken some of the resulting fragments will retain an original surface. Light microscopy can be used to identify these surfaces and to examine surface features characteristic of the type and origin of the glass (398).…”

Section: Trace Evidencementioning

confidence: 99%