Papers by Heidi Harralson
Routledge eBooks, Sep 25, 2014
viii, 140 hal.: ill.; 23 cm
Journal of Forensic Document Examination
With the increasing use and variety of gel pens on the market, forensic document examiners may en... more With the increasing use and variety of gel pens on the market, forensic document examiners may encounter problems identifying gel pens from other common pen types. This study discusses the initial findings of an investigation into the history, technology, and properties of gel pens. Microscopical (visual) and chemical methods were also evaluated as ways to characterize and identify gel inks. The results of the study demonstrate that the presence of a gel ink can often be determined, but that some gel inks resemble other types of pens, especially roller balls, upon visual examination. Further, chromatographic methods used to characterize traditional dye-based inks may be less useful with gel inks; for these, other spectrometric methods including Raman spectroscopy and energy dispersive x-ray spectrometry (EDS) were evaluated and proved useful.
Forensic document examination is the study of physical evidence and physical evidence cannot lie.... more Forensic document examination is the study of physical evidence and physical evidence cannot lie. Only its interpretation can err. Only the failure to find it, or to hear its true testimony can deprive it of its value. ―Roy Huber This is a comprehensive update of Huber and Headrick\u27s seminal work on handwriting examination. New coverage includes a review of forensic handwriting examination research, handwriting analysis training and proficiency, revised methods and procedures, an updated listing and clarification of terminology and electronic signatures, the analysis of digitized handwriting, and other related technological advances. The book includes updated photographs, several added illustrations, and advances in techniques based on the scientific research conducted in the area over the last 20 years.https://dc.etsu.edu/etsu_books/1195/thumbnail.jp
Huber and Headrick’s Handwriting Identification, 2017
Huber and Headrick’s Handwriting Identification, 2017
Huber and Headrick’s Handwriting Identification, 2017
Huber and Headrick’s Handwriting Identification, 2017
Huber and Headrick’s Handwriting Identification, 2017
Huber and Headrick’s Handwriting Identification, 2017
Abstract. A comparison of prefatigue and fatigue handwriting conditions between movement disorder... more Abstract. A comparison of prefatigue and fatigue handwriting conditions between movement disorder patients and normal controls was conducted of online recordings and offline samples. The offline analysis showed differences due to fatigue. The differences were more pronounced in certain movement-disorder patients (e.g., printing, size, tremor, or baseline) than in the control subjects (e.g., expansion). In the online analysis, the patients were slower and more variable than the controls. Certain patients exhibited increased speed and decreased relative pen down duration during the fatigue condition. Individual responses to fatigue have relevance in the assessment of the range of variation within individuals. Fatigue increases variability in motor-disordered handwriting more severely than in healthy handwriting. 1. Introduction This study examines the effects of fatigue in handwriting among a group of early onset or mildly impaired Parkinson’s disease (PD) and essential tremor (ET) pa...
Handwriting Identification, 1999
viii, 140 hal.: ill.; 23 cm
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Papers by Heidi Harralson