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“Computer Graphics and Evidence Presentation” Abstract In the UK forensic animations are becoming an increasingly important visual aid in courtroom situations, where complex data relating to a sequence of events is being visualised before a general public who may have little or no understanding of established forensic procedure or methodology. This paper will introduce and discuss a spectrum of new technologies that utilise new developments in Computer Graphics (CG) and Virtual Reality (VR) for a range of incident investigation and presentation scenarios.

Abstract

In the UK forensic animations are becoming an increasingly important visual aid in courtroom situations,where complex data relating to a sequence of events is being visualized before a general public who may have little or no understanding of established forensic procedure or methodology. This paper will introduce and discuss a spectrum of new technologies that use new developments in Computer Graphics (CG) and Virtual Reality (VR) for a range of incident investigation and presentation scenarios.

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The detection of adulteration of fuels and its use in criminal scenes like arson has a high interest in forensic investigations. In this work, a method based on gas chromatography (GC) and neural networks (NN) has been developed and applied to the identification and discrimination of brands of fuels such as gasoline and diesel without the necessity to determine the composition of the samples. The study included five main brands of fuels from Spain, collected from fifteen different local petrol stations. The methodology allowed the identification of the gasoline and diesel brands with a high accuracy close to 100%, without any false positives or false negatives. A success rate of three blind samples was obtained as 73.3%, 80%, and 100%, respectively. The results obtained demonstrate the potential of this methodology to help in resolving criminal situations.

Research Article

The detection of adulteration of fuels and its use in criminal scenes like arson has a high interest in forensic investigations. In thiswork, a method based on gas chromatography (GC) and neural networks (NN) has been developed and applied to the identification and discrimination of brands of fuels such as gasoline and diesel without the necessity to determine the composition of the samples.The study included five main brands of fuels from Spain, collected from fifteen different local petrol stations. The methodology allowed the identification of the gasoline and diesel brands with a high accuracy close to 100%, without any false positives or false negatives. A success rate of three blind samples was obtained as 73.3%, 80%, and 100%, respectively. The results obtained demonstrate the potential of this methodology to help in resolving criminal situations.

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Abstract

Free-burning experimental fires were conducted in a wind tunnel to explore the role of ignition type and thus fire spread mode on the resulting emissions profile from combustion of fine (< 6 mm in diameter) Eucalyptus litter fuels. Fires were burnt spreading with the wind (heading fire), perpendicular to the wind (flanking fire) and against the wind (backing fire). Greenhouse gas compounds (i.e. CO2, CH4 and N2O) and CO were quantified using off-axis integratedcavity-output spectroscopy. Emissions factors calculated using a carbon mass balance technique (along with statistical testing) showed that most of the carbon was emitted as CO2, with heading fires emitting 17 % more CO2 than flanking and 9.5 % more CO2 than backing fires, and about twice as much CO as flanking and backing fires. Heading fires had less than half as much carbon remaining in combustion residues. Statistically significant differences in CH4 and N2O emissions factors were not found with respect to fire spread mode. Emissions factors calculated per unit of dry fuel consumed showed that combustion phase (i.e. flaming or smouldering) had a statistically significant impact, with CO and N2O emissions increasing during smouldering combustion and CO2 emissions decreasing. Findings on the equivalence of different emissions factor reporting methods are discussed along with the impact of our results for emissions accounting and potential sampling biases associated with our work. The primary implication of this study is that prescribed fire practices could be modified to mitigate greenhouse gas emissions from forests by judicial use of ignition methods to induce flanking and backing fires over heading fires.

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INTRODUCTION This report describes new full-scale compartment fire experiments, which include local measurements of temperature, heat flux and species composition, and global measurements of heat release rate and mass burning rate. The measurements are unique to the compartment fire literature. By design, the experiments provided a comprehensive and quantitative assessment of major and minor carbonaceous gaseous species and soot at two locations in the upper layer of fire in a full scale ISO 9705 room [1]. Fire protection engineers, fire researchers, regulatory authorities, fire service and law enforcement personnel use fire models (such as the NIST Fire Dynamics Simulator, FDS[2]) for design and analysis of fire safety features in buildings and for post-fire reconstruction and forensic applications. Fire field models have historically showed limited ability to accurately and reliably predict the thermal conditions and chemical species in underventilated compartment fires. Formal validation efforts have shown that for well ventilated compartment fires, with the exception perhaps of soot, field models do quite well in predicting temperature and species when experimental uncertainty is accounted for. Inaccurate predictions of incomplete burning and soot levels impact calculations of radiative heat transfer, burning rates, and estimates of human tenability. High-quality (relatively low, quantified uncertainty) measurements of fire gas species, temperature, and soot from the interior of underventilated compartment fires are needed to guide the development and validation of improved fire field models.

Introduction

This report describes new full-scale compartment fire experiments, which include localmeasurements of temperature, heat flux and species composition, and global measurements ofheat release rate and mass burning rate. The measurements are unique to the compartment fireliterature. By design, the experiments provided a comprehensive and quantitative assessment ofmajor and minor carbonaceous gaseous species and soot at two locations in the upper layer offire in a full scale ISO 9705 room [1].

Fire protection engineers, fire researchers, regulatory authorities, fire service and lawenforcement personnel use fire models (such as the NIST Fire Dynamics Simulator, FDS[2]) fordesign and analysis of fire safety features in buildings and for post-fire reconstruction andforensic applications. Fire field models have historically showed limited ability to accuratelyand reliably predict the thermal conditions and chemical species in underventilated compartmentfires. Formal validation efforts have shown that for well ventilated compartment fires, with theexception perhaps of soot, field models do quite well in predicting temperature and species whenexperimental uncertainty is accounted for. Inaccurate predictions of incomplete burning and sootlevels impact calculations of radiative heat transfer, burning rates, and estimates of humantenability. High-quality (relatively low, quantified uncertainty) measurements of fire gasspecies, temperature, and soot from the interior of underventilated compartment fires are neededto guide the development and validation of improved fire field models.

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From Out of the Abyss...

This week’s article from the past is titled Incendiary Fires Can Be Spotted and was written by Benjamin Horton, CPCU, who was President of the National Adjuster Traing School in Louisville, Kentucky..  It is taken from the Decembe 1968 Vol. XVI No.5 issue.

Incendiary Fires Can Be Spotted 

ABSTRACT The open kitchen design in small residential units where fire load density and occupant load are very high introduces additional fire risk. One big concern is that whether flash-over can occur which may trigger a big post flashover fire, resulting in severe casualties and big property damage. It is important to understand and predict the critical conditions for flashover in this kind of units. Based on a two-layer zone model, the probability of flashover is investigated by a nonlinear dynamical model. The temperature of the smoke layer is taken as the only state variable and the evolution equation is developed in the form of a simplified energy balance equation for the hot smoke layer. Flashover is considered to occur at bifurcation points. Then the influence of the floor dimensions and the radiation feedback coefficient on flashover conditions is examined. When the dimensions of the floor vary, the resulting changes in internal surface area or size of floor area both have effect on the flashover conditions. When the radiation feedback coefficient is of small value, there is no possibility of flashover. With the increase of the radiation feedback coefficient, at first it significantly affects the conditions for flashover and then moderately when it reaches a larger value. It is proved that the flashover phenomenon can be demonstrated well by nonlinear dynamical system and it helps to understand the effect of various control parameters.

Abstract

The open kitchen design in small residential units where fire load density and occupant load are very high introduces additional fire risk. One big concern is that whether flash-over can occur which may trigger a big post flashover fire, resulting in severe casualties and big property damage. It is important to understand and predict the critical conditions for flashover in this kind of units. Based on a two-layer zone model, the probability of flashover is investigated by a nonlinear dynamical model. The temperature of the smoke layer is taken as the only state variable and the evolution equation is developed in the form of a simplified energy balance equation for the hot smoke layer. Flashover is considered to occur at bifurcation points. Then the influence of the floor dimensions and the radiation feedback coefficient on flashover conditions is examined. When the dimensions of the floor vary, the resulting changes in internal surface area or size of floor area both have effect on the flashover conditions. When the radiation feedback coefficient is of small value, there is no possibility of flashover.  With the increase of the radiation feedback coefficient, at first it significantly affects the conditions for flashover and then moderately when it reaches a larger value. It is proved that the flashover phenomenon can be demonstrated well by nonlinear dynamical system and it helps to understand the effect of various control parameters.

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Man sets fire to house drying shorts, socks in microwave

We’ve all had days when inclement weather, a busted clothes dryer or a fiendish combination of the two has us scrambling to dry our under-things for that hot date or big job interview. A man in Weymouth, Utah had probably thought he’d found the ideal solution when he thought to dry his two pairs of shorts and socks in his microwave. That is, until he had to be rescued from the fire in his apartment. Neighbors led him to safety after they heard a smoke alarm go off and firefighters quickly put out the fire. All clothing items were destroyed. "The fire safety message here is to never put clothing of any kind in the microwave or an oven to attempt to dry them," said a spokesperson for Dorset fire and rescue.

A Basic Premise - People Lie

by Paul Francois & Enrique Garcia (Third Degree Communications)

It is a basic human instinct to lie to avoid consequences. We discover this around 3 years of age and it develops and spirals out of control from then on. Some people are really good liars and others not so much. But the one constant is that everybody does it to some extent. For those of you in the law enforcement community, we're not telling you anything you don't already know. For cops, getting lied to is a daily occurrence.

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Passing of Kyle Price

Kyle-Price_webMy wife and I can not begin to thank you enough for the prayers, thoughts and support that you have extended to us during our time of loss.  For those of you who did not know our son Kyle, you will never know what a GREAT person he was, but we cherish your heartfelt thoughts for us.  For those of you who did know him, we know that you will miss him as well as we do.  It's soo... hard to loose someone who has been a BIG part of your life, especially when it's your child.  We know that our faith and belief in God will get us through these hard times.  Please take / MAKE time to Love, embrace and appreciate your family and friends.  Life is too short and can be taken away so suddenly as evident in the recent Aurora, Co. event.

Services for Kyle will be held on Saturday, July 28, 2012 at 1:00 pm.

Location: "The Rock" Church
101 E. Orangethorpe
Anaheim, Ca.

Viewing: 11:00 am to 12:30 pm
Celebration of Life: 1:00 pm


Thank You,
The Price Family

In lieu of flowers, donation can be made in the name of Kyle Price to:

JJCCC*
2801 Atlantic Avenue
Long Beach, California 90806
(*Jonathan Jaques Childrens Cancer Center)

Bathroom Ceiling Exhaust Fans

Risk Control
Bathroom Ceiling Exhaust Fans
Introduction
This document provides information concerning ceiling mounted bathroom exhaust fans, used in residential, as well as industrial/commercial facilities, and provides guidance for facilities where these types of fans are present. It will help to familiarize the reader with the potential fire hazards associated with this type of fan.

Risk Control

Bathroom Ceiling Exhaust Fans

Introduction
This document provides information concerning ceiling mounted bathroom exhaust fans, used in residential, as well as industrial/commercial facilities, and provides guidance for facilities where these types of fans are present. It will help to familiarize the reader with the potential fire hazards associated with this type of fan.

Governor Brown Directs State Agencies to Revise Flammability Standards

SACRAMENTO – in an effort to protect public safety by reducing the use of toxic flame retardants, Governor Edmund G. Brown Jr. today advised state agencies to revise flammability standards for upholstered furniture sold in the state.

Governor Brown has asked the Bureau of Electronic and Appliance Repair, Home Furnishings and Thermal Insulation to review the state’s four-decade-old flammability standards and recommend changes to reduce toxic flame retardants while continuing to ensure fire safety.

“Toxic flame retardants are found in everything from high chairs to couches and a growing body of evidence suggests that these chemicals harm human health and the environment,” said Governor Brown. “We must find better ways to meet fire safety standards by reducing and eliminating—wherever possible—dangerous chemicals.”
Studies show that humans are at risk from exposure to toxic chemicals used as flame retardants in upholstered furniture. A 2008 study by the Environmental Working Group found that toddlers often have three times the level of flame retardant chemicals in their bodies as their parents, and California children have some of the highest levels of toxic flame retardants in their bodies.

A peer-reviewed study by scientists at Cal/EPA found that California women have much higher levels of toxic flame retardants in their breast tissue than women in other states and countries. Researchers from the University of California, Berkeley found statistically significant associations between flame retardant levels in the blood of California women and reduced fertility. The researchers believe this link may result from alterations in thyroid hormone levels after exposure to the chemicals.

Numerous studies demonstrate that firefighters have significantly elevated rates of cancer, including non-Hodgkin’s lymphoma and brain cancer. A study published in the Journal of Occupational and Environmental Medicine concluded that firefighters have a significantly elevated risk of cancer that may be attributed to toxic chemicals they inhale, including flame retardants.

The guidelines in place now—Technical Bulletin 117 for flammability standards—will be updated to reflect modern manufacturing methods that can lower the use of harmful chemicals.

The process to change these regulations will include workshops and the opportunity for public comment as well as administrative review.


Governor Jerry Brown
State Capitol Building
Sacramento, CA 95814

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