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ABSTRACT

The prudent teaching of the forensic fire engineering analysis of complex building fires must include the subject of computer fire modeling, particularly the use of the Fire Dynamics Simulator (FDS), developed by the National Institute of Standards and Technology (NIST).  However, the problems associated with FDS require that large buildings be divided into rooms or zones, with each assigned to an individual computational mesh.  These mutli-mesh models often produce relatively long execution times of days or weeks and typically require parallel processing computing clusters, which require technically challenging set up and maintenance.  These performance gains can only be accomplished using high performance parallel processing computer clusters designed specifically to use operating systems and hardware that exploit the parallel functions of the FDS code.  This paper presents best practices from the latest research in constructing small, medium, and large-scale high performance parallel processing computing clusters for use in academic environments to support NIST’s FDS fire model.

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Hypothesis vs. Theory

http://www.diffen.com/difference/Hypothesis_vs_Theory September 15, 2017

A hypothesis is either a suggested explanation for an observable phenomenon, or a reasoned prediction of a possible causal correlation among multiple phenomena. In science, a theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors. A theory is always backed by evidence; a hypothesis is only a suggested possible outcome, and is testable and falsifiable.

Purpose: To present an uncertain possibility that can be explored further through experiments and observations. To explain why a large set of observations are consistently made.

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 

In the new issue of NFPA Journal®, President Jim Shannon said the Association will focus on the leading causes of home fires, including cooking. "We also need to continue to push hard for home fire sprinklers. That's still a large priority for NFPA, and we plan to work very aggressively in 2014 on our residential sprinkler initiative," he said.

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NFPA 921, Guide for Fire and Explosion Investigations plays a fundamental role in fire and explosion investigations. A new edition of NFPA 921 is scheduled to be published in 2014. For years, this document has played a critical role in the training, education and job performance of fire and explosion investigators. It also serves as one of the primary references used by the National Fire Academy to support its fire/arson-related training and education programs. It is imperative that investigators understand the scope, purpose and application of this document, especially since it will be used to judge the quality and thoroughness of their investigations.

NFPA 921, Guide for Fire and Explosion Investigations plays a fundamental role in fire and explosion investigations. A new edition of NFPA 921 is scheduled to be published in 2014. For years, this document has played a critical role in the training, education and job performance of fire and explosion investigators. It also serves as one of the primary references used by the National Fire Academy to support its fire/arson-related training and education programs. It is imperative that investigators understand the scope, purpose and application of this document, especially since it will be used to judge the quality and thoroughness of their investigations.

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SAN DIEGO - A Team 10 and Scripps News investigation found arson fires are not investigated properly in many American cities -- including San Diego -- due to a chaotic patchwork of reporting systems and standards.

Many deliberately set building fires are not reported to the federal government.

Nationally, just 5 percent of all residential building fires are intentionally set, according to the National Fire Incident Reporting System, which is part of the Department of Homeland Security.  Data collected by Scripps News suggests the national arson rate to be significantly higher.

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Hoverboards Put On No-Fly List, As Airlines Cite Fire Concerns

Hoverboards like the one seen here won't be allowed on flights by America's top three airlines, which are citing a potential fire hazard related to the self-balancing scooters' powerful lithium-ion batteries.Citing a potential fire hazard, major U.S. airlines are banning hoverboards from their cabins and cargo holds. Announcing its ban, Delta acknowledged the toy's "presence on many gift lists this holiday season" but said safety comes first.

The bans come as the U.S. Consumer Product Safety Commission says it's looking into at least 10 reports of the self-balancing electric scooters bursting in flames — an occurrence that's allegedly been captured on video, in some cases.

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Limoss Recalls Battery Power Packs for Power Recliners and Lift Chairs

Recalled Limoss AKKU-PACK battery power packDescription

This recall involves Limoss AKKU-PACK rechargeable lithium ion battery power packs sold as accessories for Palliser, Flexsteel and Best Home Furnishing power recliners and lift chairs. They are used to power the chair when an electrical outlet is not available.  “Limoss Li-ion Battery Pack,” model number ZB-B1800, code MC 160 and dates codes of 11-0102011 through 6-14-2012 are printed on a white sticker on the side of the unit. Recalled battery power packs are black and measure 6 inches long by 3 inches wide.

 

Read the full details at CPSC.

Horizon Hobby Recalls E-flite Chargers

Recalled E-flite Ultra Micro-4, 4x9W, AC/DC Battery Charger
Description

This recall involves the EFLC1105 E-flite Ultra Micro-4, 4x9W, AC/DC Battery Charger from E-flite. The charger has four independently functioning charge circuits with a LED status display. Each port can charge one 30–150mAh, 1S UM cell, a 1S MCPX cell, or one 120–300mAh 2S pack equipped with a JST-PH, 3-wire connector. The charger measures 5 inches tall by 7 inches wide by 1.5 inches deep.  The charger is blue with a gray, black and blue faceplate with white and black type. “Eflite Celectra UMX-$ Battery Charger” is printed across the center of the charger.

 

See the full details at CPSC

Nestlé Waters North America Recalls Water Dispensers

Description

This recall involves Nestlé three and five gallon cold and hot water dispensers. The units are white and silver in color and measure about 38 inches tall by 13 inches wide. Water is dispensed from the large plastic water bottle on the top of the unit through the machine by pushing on the paddles below that are marked with blue for cold water and red for hot water. The Nestlé Waters North America logo is on the front of the units. Only the following model and serial numbers are included in this recall. The model and serial numbers are printed on a white sticker on the back of the units.
 

Details can be seen at CPSC.
 

 

Recalled Nestlé water dispenser
Model Numbers
Serial Numbers

deBW210EZ

BW210EZES

LB15A12606

LB15A12620

LB15A12622

LB15A12631

LB15A12670

LB15A12687

LB15A12690

LB15A12762

LB15A12763

LB15A12848

LB15A12849

LB15A12870

LB15A12888

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