Recently, Colonel Hanavan wrote a series of volumes on the C-7A Caribou in Vietnam. First Lieutenant Jensen (at the time) worked in safety as well as piloting cargo. His service included being awarded the Distinguished Flying Cross.
Assigned to investigate a residence fire, the effort was made to determine if an active appliance caused the fire. Electrical components of the residence consisted of the circuit breaker panel, the electrical wiring in a pile of debris, and an air handling unit. The circuit breaker panel showed no evidence of malfunction. The appliances formerly … More From the Archives: Indeterminate Fire
A tractor operator was injured in the groin area when the machine’s seat clamps failed, releasing the seat. The seat was improperly installed using single bolted electrical straps (image below). The tractor was operated for a significant amount of time with this hazard, long enough for the electrical straps to rust. New electrical straps were … More From the Archives: Seat Installation Failure
Dr. Jensen recently published a ground-breaking research article in Astrophysical Journal, “Plasma Interactions with the Space Environment in the Acceleration Region: Indications of CME-trailing Reconnection Regions”. Read More!
When prosecutors present the results of a piece of evidence analyzed in the lab, a question often comes up: how good is the measurement? It’s an important one to ask, because the error bars tell you how good the measurement is. If a Breathalyzer measurement was collected by police, and the result was near the … More Erroneous Drug Quantity Measurements using Uncalibrated FTIR/ATR Instruments
Dr. Elizabeth Jensen’s presentation to the American Society of Safety Engineers (soon to be Safety Professionals) Energy Corridor meeting is linked below. Practical Cybersecurity: Where You Fit into the Big Picture
The combustion engine relies on its coolant system to function properly. When it doesn’t, the cylinder head can crack due to heat stress, the differential thermal expansion of metal. Naturally, the fracture occurs between the hot area (combustion exhaust) and cold areas of the cylinder. When the metal cracks between these two areas, coolant can … More Cracked Head (Cylinder Head Fracturing)
Being that humans are creatures of habit, an uneven stairwell challenges users, even those grown familiar with asymmetries in construction. The most critical components of a stairwell to avoid becoming a tripping or slipping hazard include a decent (and uniform) tread and riser value. In the case of International Building Code specifications, this is 11 … More Stairwells and the Codes
There are various models that emphasize different components that combined into an accident. While Heinrich’s Axioms of Industrial Safety are most widely applied, there are others that target relationships among the contributing factors to an injury. As a brief introduction, I’d like to share a few of our investigations and a model that aligns with … More Incidents & Accident Models
As documented in “ATLANTA BRIDGE COLLAPSE: What burned under the I-85 overpass?” by Richard Elliot and Rikki Klaus of wsbtv, the material stored under the I-85 bridge for 10 years was High Density Polyethylene. As I discuss what that means fire-safety-wise, I’ll be generally talking about polyethylene. Polyethylene is constructed from the combination of ethylene … More Understanding The I-85 Fire