Images of highest quality ever in the field
The visual impression provided by a TLC plate showing all samples and standards side-by-side is one of the most convincing arguments to employ Thin-Layer Chromatography. No other chromatographic technique can directly express the result as a color image and make it available for visual evaluation.
A state-of-the-art documentation system is needed to reproducibly acquire and digitally preserve an impression at different wavelengths.
Key features of TLC VISUALIZER documentation and evaluation system:
Forensic Science Society
Autumn Conference & AGM – Research, Evidence & Evaluation
31 October – 2 November 2008
Robinson College Executive Centre, Wyboston
Provisional Programme
Convenor: Dr Niamh Nic Daéid
| Friday 31 October Bookings for workshops will be accepted on a first come first served basis. A fee will be charged to attend each workshop – see registration booking form (a) How to Pass the CSI Diploma (b) TBC TBC Science Society TBC Strathclyde interpretation and evaluation of physical evidence Ruth Morgan, Jill Dando Institute Lorna Dawson, Macauley Institute Including Presidential Address | Saturday 1 November arbitrary illumination & camera geometrics from 3D face data Spectral Evidence & the use of Isotope Ratio Mass Spectrometry important? Mathematically Challenged Forensic Scientist | Sunday 2 November Gareth Booth, Forensic Science Service Case The Forensic Science Society |
If you book before 25 July 2008 you are entitled to Early Booking Discounted Prices – details overleaf. To be
eligible for this discount payment must be made in full with the booking or within 30 days with a quoted purchase
order number provided with the booking form.
Flyer: http://www.forensic-science-society.org.uk/pdf/311008.pdf
http://www.eink.com/press/releases/Wacom_E_Ink_051908.pdf
Woman with mandolin in yellow and red
of Max Beckmann dating 1950. The discovery of a red naphthol AS pigment by Raman spectroscopy in a sample from the Three field workers by Georg Baselitz (1964/1965) demonstrated that in some cases complementary chromatographic methods are needed for a comprehensive identification of the organic pigments.Samsung SDI developed the display to be just 300µm thick. However, even with the integrated colour display, the data page of the ePassport is still only 700µm thick, the companies claim.
The display comprises an active matrix display with organic light emitting diodes (AMOLED). This means that located behind every pixel of the display is an active electronic circuit with low power consumption. AMOLED displays are said to provide excellent colour images and can be produced in much thinner formats that conventional LCDs.
The materials used for the display are heat-resistant, so that the passport card can be laminated and hence protected against manipulation.
The field of forensic science has profited from recent advances in the elicitation of various kinds probabilistic data. These provide the basis for implementing probabilistic inference procedures (e.g., in terms of likelihood ratios) that address the task of discriminating among competing target propositions. There is ongoing discussion, however, whether forensic identification, that is, a conclusion that associates a potential source (such as an individual or object) with a given item of scientific evidence (e.g., a biological stain or a tool mark), can, if ever, be based on purely probabilistic argument. With regard to this issue, the present paper proposes to analyze the process of forensic identification from a decision theoretic point of view. Existing probabilistic inference procedures are used therein as an integral part. The idea underlying the proposed analyses is that inference and decision are connected in the sense that the former is the point of departure for the latter. As such the approach forms a coordinated whole, that is a framework also known in the context as ‘full Bayesian (decision) approach’. This study points out that, as a logical extension to purely probabilistic reasoning, a decision theoretic conceptualization of forensic identification allows the content and structure of arguments to be examined from a reasonably distinct perspective and common fallacious interpretations to be avoided.
http://linkinghub.elsevier.com/retrieve/pii/S0379073807008055
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| Forensic handwriting examination: A definitive guide, Reed Hayes, Reed Hayes Publications, Honolulu, HI, ISBN No. 0-9778415-0-2, 254 pp, ($49.95). |
Nova Rhetorica, 18th century) showed alternately, sometimes in the same page, dark-black well-defined inks and reddish-brown smudged ones. The latter ones were very difficult to be read and historians identified it as an iron-gall. Our first investigations of the document revealed that the ink had variable composition, but it always showed some typical features of logwood ink. To obtain a better understanding, we prepared, following ancient recipes, logwood inks with the addition of various metallic (Fe, Cr and Cu) salts or amorphous carbon. Iron-gall ink was also used for comparison and in order to obtain an unambiguous and full characterization of the most widespread inks used in manuscripts. Raman and infrared spectroscopies allowed us to identify the characteristic vibrational features of each prepared medium. These techniques, together with X-ray fluorescence (XRF) and multispectral investigations of the original document led us to hypothesize that iron salts were periodically added to the original logwood ink. These sequences of ink quality can be ascribed to a shortage of ink during the writing of the manuscript. A small amount of iron salt immediately darkens the logwood extract, allowing its prolonged use. The presence of iron complexes produces a reddish-brown coloration and causes ink migration in the paper. Combining all the information, we were able to suggest an appropriate restoration treatment and to choose infrared illumination to maximize the readability of the text.
