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UV is a form of radiation generated by atomic transitions in chemical reactions such as those present in the Sun and in man-made equipment s...
Monday, May 30, 2011
The French Solution To Anti-Vehicle Mines
May 26, 2011: France is sending its new SOUVIM 2 mine clearing system to Afghanistan, to give it a chance to succeed under combat conditions. This makes it much easier to sell to export customers. More importantly, France has thousands of troops in Afghanistan, and if SOUVIM 2 works as advertised, it will save French lives. It will may also generate some sales to other NATO nations with troops in Afghanistan. To that end, SOUVIM 2 was designed to work with current MRAP vehicles used for mine clearing. SOUVIM 2 can clear 150 kilometers of road a day, at the rate of 10 kilometers an hour.
SOUVIM 2 consists of a tow vehicle, with a V shaped undercarriage and large, low pressure tires that impart too little pressure on dirt roads to trigger most anti-vehicle mines. The tow vehicle only carries one operator, whose cab is completely armored. This vehicle carries electronic mine detectors in front, and pulls two trailers that carry additional gear for detecting or triggering mines.
SOUVIM 2 is designed to detect or trigger a wide variety of mine designs, including some very old ones. A major source of sales is expected to be peacekeeping operations and civilian relief operations. Because of that, the equipment is designed for ease of use, and capable of being used by civilians after brief training.
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Monday, May 16, 2011
South Korea Tries Out Helicopter UAVs
April 29, 2011: Austrian aircraft manufacturer Schiebel has sold two of its S-100 helicopter UAVs to South Korea. The S-100 weighs 200 kg (440 pounds), can stay aloft six hours per sortie and operates at a max altitude of 5,500 meters (18,000 feet). Max speed is 220 kilometers an hour. U.S. firm Boeing markets the S-100 in many parts of the world. Helicopter UAVs are considered superior in urban areas, or for operating off ships. South Korea wants to use the S-100s off its west coast, along the maritime border with North Korea.
While General Atomics has a lock on mid-size (1-5 ton) UAVs (Predator and Reaper), and AeroVironment has the bulk of the micro-UAV (two kg/4.4 pound) market with its Raven, the rest of the markets are up for grabs. Thus one of the traditional aviation companies, Boeing, is trying to grab market share via buying, or marketing, many promising UAV designs (A160T, ScanEagle, SolarEagle, Bat and the S-100 Camcopter). Boeing is hoping that one of these designs will catch on big.
Helicopter type UAVs are becoming more popular. The 1.5 ton A160T and .2 ton S-100 are helicopters, and able to hover. The A160T is also competing as a cargo carrier for the U.S. Marines. There are over 200 S-100s on order, mostly by armies and navies eager to try out a helicopter UAV under realistic conditions (including combat).
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Tuesday, May 10, 2011
Battlefield Smart Phones Being Tested
April 28, 2011: After two years of intense effort, the U.S. Department of Defense has come up with a battlefield smart phone design. Sort of. Currently under development is the JBC-P (Joint Battle Command-Platform). Actually, it's called JBC-P Handheld, and it's a bit larger and heavier than your average cell phone (iPhone 4 is 137 grams/.3 pound.) The JBC-P runs Android software and needs a larger battery to handle the encryption requirements, and the need for more time between charges. Prototypes of the JBC-P are currently being tested by troops. Since JBC-P uses the Android operating system, it can use most existing Android apps, and will find lots of skilled Android programmers available to create military-specific apps. The military already knows of hundreds of useful military apps, because app developers, and the troops, have been turning them out already, for use on existing smart phones.
The current tests are partly to determine if a commercial Android smart phone, with a "tactical sleeve" (for protection from rough treatment and moisture) will be rugged enough. If not, a more expensive ruggedized version of a commercial phone will have to be built. This is not a problem, as ruggedized laptop computers have been around since the 1990s, and are common items on battlefields. The prototypes also are testing how robust battlefield adaptations of wi-fi and cell phone communications are, especially when encryption is added.
All this came out of a decade long U.S. Army effort to get the Internet onto the battlefield. This is really, really urgent because the troops continue to demonstrate how important Internet connectivity is to winning battles. There are so many useful tools on the Internet, that simply having access gives you an edge. This has already been demonstrated many times in the past seven years. It was in Iraq that combat troops were first able to obtain Internet access in a combat zone, and the troops quickly demonstrated how useful this was for maintaining morale, and getting the job done. The army hustled, and used commercial firms to quickly arrange access. But this was mainly wired access on bases. The troops want wi-fi while under fire.
This has been driven by a trend, in the last decade, for Internet access to become available on more powerful cell phones ("smart phones"). These devices are extremely popular with the troops, and this is the kind of device they feel comfortable using on the battlefield. So now the army is not only seeking to get Internet access to the battlefield, but to find a way that the troops can access it via a smart phone.
The military is experimenting with using commercial gear to create large wi-fi or cell phone coverage hot spots. This has already been tested, and actually deployed in support of disaster relief operations. There is also a lot of work underway to develop a cell phone that could survive battlefield use.
Two years ago, one defense supplier (Raytheon) responded to what the troops were calling for, and quickly put together RATS (Raytheon Android Tactical System). Taking advantage of the open source Android operating system (think of it as mobile Linux), and the thousands of applications already available for it, RATS combined this with increasingly powerful, and inexpensive smart phone hardware, to produce something the troops want. Actually, RATS isn't a phone, it's a wi-fi device that looks like one (as does the Ipod Touch). RATS has GPS, a compass, vidcam and software that enables users to connect, and show each other's location on the screen. It's also possible to operate robots with RATS, or receive video from a UAV overhead (like the five pound Raven the army uses thousands of.) RATS has mapping software, and the ability to download maps and use them with the wi-fi location system to provide a constantly updated view of where everyone is. Typically, gear like RATS is carried by officers and NCOs (down to team- groups of five troops- leaders or vehicle commanders). RATS can also send or receive video or pix. The touch screen makes RATS easy to use in combat. RATS was developed quickly, in part to demonstrate how quickly one can turn a commercial cell phone into a water and shock proof, encrypted device, ready for the battlefield.
Army brass quickly became aware of RATS, and now there's an effort to get something like it into the hands of the troops (like JBC-P). This speedy response is largely the result of American infantry officers, especially those with combat experience in Iraq and Afghanistan, having become tech-heads. That was not hard to do, because of all the electronic gear combat troops now carry. Officers often have laptops with them in combat, to display maps, overhead UAV video, satellite photos and all manner of data needed for them to fight smarter and more effectively. The troops use night-vision gear, electronic rifle sights and much more. Some get to handle portable radars that can see through walls and binoculars that have laser range finders and electronic links to artillery units. Many of the troops have cell phones. Smart phones, like the iPhone and Android models, are popular. These smart phones can use thousands of programs, and some of these are very useful for military personnel. These gearhead troops understand how useful RATS or iPhone could be with software designed for military purposes.
Now the Department of Defense is trying to develop a smart phone for the combat troops. The biggest problem they will encounter will be the Department of Defense. It is believed that creating a militarized version of the smart phone should be quite possible, as the Department of Defense has been increasingly successful in "militarizing" (often with nothing more than a new coat of paint) superior civilian gear for military use. But the normal time it takes to develop new military tech is measured in years, often a decade or more. Commercial cell phones become obsolete in less than a year. The JBC-P effort is an attempt to show that the military can keep up.
Smart phones need a bit more customizing for military use. First, there is the problem of ruggedness. The battlefield is a hostile environment, and only the sturdy gear survives. The military has already coped with laptop computers and GPS devices. There are military/industrial versions available that survive harsh environments. No reason this cannot be done with smart phones. Actually, it's already been done, by improvising, with soft cases already sold for smart phones. There is always a commercial market for this sort of thing, to supply those who work on construction sites or other dangerous (for delicate gear) environments. This tends to suit troops out in the combat zone. But the other problem, data security, is a larger problem. Most cell phone messages are already encrypted, but not with a strong enough cipher to satisfy the military.
Stronger encryption for smart phones is not a huge problem, but how it is achieved is. That's because the smart phones are so useful and popular because they are rapidly evolving. Military research and development is the opposite of rapidly evolving. So is the Department of Defense procurement bureaucracy, which is infamous for taking decades to get new stuff developed and to the troops. So unless you adapt a system that can use the latest tech, and just add on the padding and military grade crypto, any military smart phones you develop will quickly become obsolete before it even reaches the troops. This has already happened with other electronic items, and the hope is that it won't happen with smart phones as well
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Tuesday, May 3, 2011
Taiwan's Secret Missiles
May 1, 2011: A government official revealed that Taiwan had developed a IRBM (Intermediate Range Ballistic Missile) with a range of 2,000 kilometers. The missile was successfully tested three years ago. Nothing was said about production. Seven years ago, Taiwanese officials discussed developing a 2,000 kilometer range IRBM, and manufacturing 30 of them, along with 120 with a range of 1,000 kilometers. Over the last decade, there have been reports of several different Taiwanese ballistic and cruise missiles developed for use against China. But few of these have been produced, or have been manufactured under great secrecy. Meanwhile, China has deployed about 1,500 ballistic missiles within range of Taiwan.
A decade ago, Taiwan apparently deployed 50 Tien Chi (Sky Spear) SRBM (Short Range Ballistic Missiles). Half were in silos on Tungyin Island, and the rest in some other location. Like most of Taiwan's Surface-to-surface missiles, it was based on a locally developed surface-to-air missile (in this case, Tien Kung 2/Sky Bow 2), with the addition of a booster to extend the range. The Tien Chi had a range of about 500 kilometers, but a small (100 kg/220 pound) warhead. The new IRBMs have a warhead of about half a ton.
Taiwan does not have nuclear weapons, although the nation possess the technical resources to develop such weapons, and perform the engineering work to make these nukes function in a ballistic missile. But Taiwan would be taking a big risk to attempt development of nukes. If China got word of the project, before useable warheads were in service (and thus able to dissuade China from attacking), the Chinese might well invade right away, or at least try to.
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Monday, May 2, 2011
Indonesian Carrier Killer Comes Out Of Hiding
April 29, 2011: Indonesia recently test fired a Russian-made Yakhont anti-ship missile, launching it from one of its Van Speijk class frigates. Four years ago, Indonesia bough an undisclosed number of Yakhont missiles from Russia, but since then, nothing was heard about what was done with them. At the time, Indonesia said it wanted to use the Yakhonts to replace its U.S. Harpoon missiles. Both missiles cost about the same ($1.2 million each).
Yakhont (also known as Oniks, P-800 or 3M55) is a 8.9 meter (27.6 foot) long, three ton missile with a 300 kg (660 pound) warhead. Early ship launched versions had a range of 120 kilometers, but the Indonesians apparently have a more recent model, which has a range similar to the Harpoon. The big advantage of the Yakhont is its high speed (about 2,500 kilometers an hour). This makes it more difficult to defend against.
The 546 kg (1,200 pound) Harpoon is 4.6 meters (15 feet) long, has a 222 kg (487 pound) warhead and a range of 220 kilometers. It approaches the target low, at about 860 kilometers an hour. GPS gets the missile to the general vicinity of the target, then radar takes over to identify and hit the target. The Harpoon has successful combat experience going back two decades. Most corvettes and many frigates are small enough to be destroyed by one Harpoon. Yakhont does more damage because of the high speed, and greater weight. Yakhont was originally deployed as a "carrier killer"
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Sunday, May 1, 2011
An atom laser that behaves exactly like a light laser has opened up new possibilities in applications such as holograms
A research team from The Australian National University ARC Centre of Excellence for Quantum-Atom Optics has shown that a beam of helium atoms can be made to have properties similar to a coherent laser light beam. The atom study confirms a theory first developed for light nearly 50 years ago by Roy Glauber, winner of the 2005 Nobel Prize in physics.
When scientists measure the time between the arrivals of the photons in laser beams, they find that the photons are randomly spaced, with all arrival times between photons equally probable. However, incoherent sources – such as lightbulbs – exhibit photon bunching, where it is more likely that photons will arrive within a short time of each other. The bunching is manifested by photons arriving in pairs (second order) or in triplets (third order).
The investigators realized that if they made the atoms extremely cold – within one-millionth of a degree of absolute zero – they could force them to march in step, creating an atom laser that behaves coherently exactly as a laser beam composed of photons. This showed, for the first time, that the same second- and third-order-coherence properties of lasers also apply to atoms. In addition, the cold atom laser demonstrated random distribution of arrival times with no bunching, indicating that it was perfectly coherent.
When the atoms were warmed back up, the group found that they no longer behaved coherently and once again exhibited bunching in pairs and triplets.
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