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Since 1980

Apr 2 2014

How GEM’s Sensors Help Detect Underwater Bombs

GEM Systems produces magnetometers for a variety of applications – even for scouring out still-dangerous bombs hidden underwater. Our technology has been strapped to a rig dangled some 30 metres underneath a helicopter as it is sent flying out over the water. The lowest part of the rig, which contains GEM’s sensitive magnetometer equipment, flies just two metres above the surface of the water. This tight span is carefully measured by a downward-pointing laser positioned towards the back of the rig. The distance does not leave much in the way of wiggle room, making for a very narrow margin of…


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Mar 31 2014

How do Scientists Discover Oil? Part 2

Once geologists have found an area they think may contain oil reservoirs, they turn to several different tools and techniques to ascertain if there really is oil hidden away in the ground below. There are numerous pieces of equipment that can be used in the process of looking for oil. One tactic is to not look but test for the smell of hydrocarbons. These specialized detectors, informally known as sniffers, use ultra-sensitive electronic noses to detect indicators of the presence of hydrocarbons. Another technique is to deploy advance seismic equipment. These machines create special shock waves that are sent down…


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Mar 25 2014

How do Scientists Discover Oil? Part 1

Filling up your tank may be an easy thing to do, but the process by which oil is discovered is anything but. The creation of oil is itself an amazing process – beginning with the death millions of years ago of very small plants and animals, with the organisms sinking into and mud. These remains mixed with sediment to form what’s known as source rock. And when the source rock is pressured and heated by new sedimentary layers, it distils the remains of the organisms into natural gas and crude oil. These fossil fuels then shift into what’s called reservoir…


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Mar 17 2014

Top Eight Ancient Roman Coins

There are many parallels between society today and civilization back in the times of ancient Rome. One of the most easy to grasp (literally) is the Roman’s minting and use of coins as currency. The coins, made of gold, silver, brass and copper, first began being used in the 3rd Century BC, but saw numerous changes into the era of Imperial Rome, including differences in shape and denomination. Many may assume these coins always were emblazoned with the likeness of the emperor of the day. However, it wasn’t until the reign of Julius Caesar that coins were issued bearing an…


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