Examination of Firearms Review: 2007 to 2010 - Interpol

A novel model for prediction of a multi-component liquid being spilt for the purposeful
intention of arson has been developed. The method presages concentrations of fuel
vapours, evaporation rate and the flash point on a liquid fuel consisting of many
components. The model uses Raoult’s law considering the activity coefficient and the
estimated values corresponded well with the measured ones. 114
One way model has been used to predict the ignition time and spontaneous ignition
of some woods. The investigation has been both theoretical and experimental,
consisting of pyrolysis and spontaneous ignition studies. The heat was radiated from
upper electronic radiator and ignition was initiated without other external sources.
Four different radiator powers and four tree species were tested. The modelling
results matched well with the experimented ones. 115
Different kinds of software of numerical simulation have been used mainly by the fire
prevention purposes. For example, the selection of a fire origin room has been
determined by a mathematical, multicriteria decision-making model in which fire
loads are estimated. 116, 117 Also experimental investigations of fire spread and
flashover time in office fires have been made. 118 Furthermore, the data obtained
from the fire ignition location, probability of fire spread or evaluation of risks of fatality
119, 120
in building fires can all be calculated by the Bayesian network.
The Bayesian theorem includes two separate but important features of forensic work:
the question if scientific evidence can be based on a probabilistic argumentation and
identification of forensic analyses. The method helps in sorting and evaluating
analytical information in complex cases. 121 A few publications considering the
Bayesian network have been published. The first considers the logic and
argumentative implications in which examination is made with a distinct perspective
in order to avoid false interpretations. 122 The second reviews the use of the methods
in chemistry, including forensic sciences, chromatographic and mass spectrometric
methods. 123 The third article serves as a guide in parameter estimation when using
forensic data. It is the first part which introduces the way to apply this method; the
second part is on its way and will be published this year. It will demonstrate the
network fragments as building blocks while constructing larger interference
models. 124
The number of tragic accidents and fires in road tunnels during the past decades has
been a starting point for tunnel safety and simulations of tunnel fire events. 125
Several fire safety studies have been made considering fire scenarios in road tunnels.
Many of the experiments and their results can be used in other tunnels, such as
subway or river tunnels. 111 Here only a few of them are cited, in case of interest or a
112, 126-132
possible need for fire investigations.
5. Educational aspects of fire investigation
There are some problems in teaching fire investigation, such as a lack of
uncontaminated fire fields, time dependence and varying circumstances. Thus the
development of fire scene investigator students in understanding investigation
theories, skills and applications has been studied in a virtual environment. A
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