Category: Outdoor Activities

Tips For Mountain Biking And Its Types


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You must get to know proper types of mountain biking when you think of travelling with your best bikes around. You may find good bikes that help you to get the right thing for you. Also you must know all the tips related to mountain biking. You must check for the best mountain bikes 2015 that will guide you with proper bikes for you.

This mountain biking has now became popular and is the best outdoor game to play and good way to stay fit. This game helps to burn many calories and with making it best exercise. You may get great activity with this sport.

The Particular Golf Buddy GPS: A Golfer’s Dream Helper


Golf Friend includes a great status for manufacturing precise golfing GPS techniques which are easy to use plus include free program downloads. There are many explanations why many golfers through newbie to professional swear by these GPS systems. Moreover if you purchase the perfect product, you should read the golf gps watch reviews first. One main feature that units this company’s items in addition to the remaining products on theámarket is that their own official web site provides a lot more than 20, 500 course maps online cost-free. It is also mostly of the companies offering program downloads outside theáUnited States of America. Another advantage is the fact that the procedure of installingáprograms from the web site is without headaches, in comparison to a few of its rivals.Golf Ball

Follow these safety instructions for a safe e-scooter driving


One of the best things about e-scooters, electric powered motorcycles and mopeds is that it really feels nice and fun to drive them. People from all walks of life can be seen driving them such as youngsters, children and even adults.Helmet for kids

However, there is one thing which strikes every mind and it is safety. Yes, you cannot compromise on the safety factor even when you are driving at a speed of 20 to 30 miles per hour only. Let us try to look into some important safety instructions that you should always follow while driving e-scooters. These safety instructions will help everybody minimize the risk of an accident as well as injuries.

Racing concrete canoes takes both physics and physiques – Part 3


THINK OR SWIM

Called the America’s Cup of civil engineering, the National Concrete Canoe Competition is a three-day event that culminates thousands of unpaid hours of research, design and experimentation as well as thousands of dollars in fund-raising for materials, transportation and lodging at the competition site.

The competition is divided into written and oral presentations, which make up 60 percent of the final score, and canoe races–distance and sprints, single-sex and coed–which make up the remaining 40 percent. Then there is the Swamp Test, in which the canoe must prove itself able to float in spite of being filled entirely with water. Points are also given for boat names, which tend to run toward unfortunate puns like Aggregated Assault (University of Maryland), Rockamole (University of Tom at San Antonio) and Wisconcrete Woody (University of Wisconsin).

Outside help is allowed, and when it comes to gathering building materials, money or expertise, almost anything goes. Besides being understaffed and underfinanced, Florida Tech was especially weak in the paddling department. To remedy this they brought in Dennis Beek, a champion canoe racer, who offered to coach the students as much as they could stand it, which turned out to be three to six times a week for a year.

13concrete canoe Buffo-Kyle Buffo and Steven Saleh  paddle duirng the mens sprint competition during the 2013 Pacific Southwerst Conference Concrete Canoe competition at the Santa Fe Dam Recreation area in Irwindale April 5, 2013.

Florida Tech’s arch rival, die massive University of Alabama at Huntsville, enlisted NASAs help in the form of some surplus reinforcing materials from the Space Shuttle. Not surprisingly, graphite-impregnated tape that has been incorporated into an epoxy matrix by being baked in an oven the size of a school bus is hard to whip up in the average college lab. This engendered some hostility from some of the other teams regarding what they believed was an unfair advantage.

Dr. John Gilbert, the faculty advisor for UAH’s concrete canoe team, put it all in perspective: “The competition is very close to real life,” he said, “and real life is not always fair.” Nonetheless, UAH’s team, which has taken first place at three of the past five national competitions, has since elected to distance itself from NASA.

In Cleveland last June, however, none of that mattered. Not even NASA could have stopped Florida Tech. Playing David to an army of Goliaths, including UCLA, Michigan State and the unsinkable UAH, Florida Tech took the 1997 Nationals by a bow length with a score of 122 total points to Alabama’s 119. UC Berkeley came in a distant third with 91.

“It’s not money or manpower that wins this competition,” said Florida Tech’s captain, Montemayor, whose team also won the Spirit of Competition award for prevailing in spite of overwhelming odds. “It’s desire and design. I guess we just wanted it more. ”

Florida Tech’s victory came as quite a blow to the heavily favored UAH; like Dennis Connor losing the America’s Cup to New Zealand. There’s a good chance Florida Tech and UAH will meet again at the 1998 Nationals, which will be hosted by the South Dakota School of Mines & Technology in Rapid City in June. Don’t be surprised if Alabama has changed the name of its canoe from Knot Crackin’ to No Prisoners.

Racing concrete canoes takes both physics and physiques – Part 2


In 1987 the event went national after it picked up sponsorship from Master Builders Inc. At the 1997 National Concrete Canoe Competition, held in Cleveland, Ohio, last June, 25 regional winners from the U.S. and Canada were represented. Their sleek, hydrodynamically sound racing crafts showcased cutting-edge concrete technology, and many of the 16- to 20-foot boats had cut their weights to less than 100 pounds. Some entries weighed less than 70 pounds (a typical 17-foot Grumman or Old Town weighs about 85 pounds), and all were made with the ASCE regulation minimum of 75 percent Portland (water-based) cement.

It hardly seems possible and, until very recently, it wasn’t. People have been trying to get concrete to float for a long time–with mixed results. In 1848, the French nobleman Joseph Louis Lambot built concrete boats for use on his estate in Miraval, France, but for some reason the idea never caught on. Following this, the infant technology languished until severe steel shortages during World War I forced U.S. naval engineers to take another look at it. One notable attempt, the Atlantus, can still be seen 150 yards off the beach at Cape May, New Jersey, where for the past 70 years or so it has served as an apartment building for fish.

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So why can’t these folks just face facts and let it go?

Because, in the sapient words of former ASCE president, Edward O. Groff: “The value of the competition should not be minimized because it is focused on a seemingly absurd concept. Many of the wonders of civil engineering were projects originally dismissed as ludicrous or impossible, such as the Brooklyn Bridge.

RECIPE FOR FLOTATION

The secret to making concrete float is not in the cement, but in the stuff it’s mixed with; that is, the aggregate (concrete = cement + water + an aggregate). The aggregate in traditional concrete is sand and gravel; it’s heavy and things made with it tend to sink like stones. The aggregate in a concrete canoe, on the other hand, might be composed of tiny, hollow ceramic spheres; foam beads from beanbag chairs; or Perlyte, which is made from volcanic dust that pops like popcorn when it reaches a certain temperature and, just like a kernel of corn, its volume increases enormously while its weight stays the same. When you mix any of these substances with water and cement and then let it cure for a few weeks, the result is a concrete that actually floats, even in slab form.

But a canoe cannot win by flotation alone.

“We were at the Southeastern Regionals,” explains Tomas Montemayor, captain of the Florida Institute of Technology‘s ’97 concrete canoe team. “Vanderbilt was there, and as soon as they put their canoe in the water it crumbled into little pieces, just like a cracker. I guess they hadn’t taken their loads and stresses into consideration.”

Apparently not, and this is why you don’t see more concrete boats around. Because, while concrete is great under compression, it doesn’t flex worth a damn, and next to flotation, flexion is what naval architecture is all about. This is where steel mesh and geotech plastic weave (otherwise known as gutter guard) come in to take the place of steel reinforcement rod, which supports concrete when it’s under stress. To further increase flexibility, polymers like latex are added to the concrete mixture.

Part 3: http://www.energiezukunft-fuer-deutschland.info/2015/06/racing-concrete-canoes-takes-both-physics-and-physiques-part-3/

Racing concrete canoes takes both physics and physiques Part 1


The National Concrete Canoe Competition is an annual event for engineering students. Contestants use advanced technology to build canoes with flotation and flexibility. Written and oral presentations and canoe races determine the winner.

It’s been raining for days and the normally docile Potomac River is swelling toward flood stage, with lightning flashing over the Washington, DC, skyline and thunder rolling ever closer, two-man crews armed with racing paddles and ferocious deltoids launch their canoes into the torrent.

But these are not your average canoes, and the people paddling them are not your average canoeists. The boats are all homemade–of concrete–and the paddlers are America’s brightest engineering students. They are competing, not only for $9000 in scholarships, but for heavy industrial glory: the raw satisfaction of pushing the envelope of concrete construction farther than anyone believed possible.

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This race is a sprint, and when the gun goes off the crews, some from small technical schools and others representing monster universities from the Big 10, immediately start digging into the current, paddling their guts out toward the finish line. The slicker-clad crowd on the river’s sodden bank is going wild when all of a sudden something pulls their attention away from the lead boat.

One of the canoes is disappearing; she’s not sinking exactly–she’s breaking up! The University of Kansas boat has broken in two, literally paddled to pieces by teammates Gerald Miller and Bryan Jahelka. While bowman Jahelka continues paddling valiantly, practically willing the forward half of the canoe across the finish line, teammate Miller, forced to abandon ship, swims alongside him, urging him on.

So goes a typical day at the races; typical at least, if you’re watching the National Concrete Canoe Competition, an annual event sponsored by Master Builders Inc., an international manufacturer of cement products, and the American Society of Civil Engineers (ASCE).

Every spring, several hundred students from North America’s top engineering schools emerge blinking from their dimly lit labs to defy common sense, not to mention several laws of physics. Their objective: to prove that concrete not only can float but can, with a couple of strong paddlers, shred water with the best of them as well.

Needless to say, concrete canoe racing has not been sanctioned by the NCAA, but it has been embraced by the ASCE, and for the past 25 years, a rare breed of engineering student from collegiate ASCE chapters around the country has devoted thousands of uncredited hours to this obscure but fiercely competitive contest. In the early 1970s, when the competition was in its infancy, the entries tended to be graceless, concrete dugouts that weighed upwards of 400 pounds and paddled about as well as a New Jersey Turnpike barrier (and sank almost as fast). It was funny at first–an engineering nerd’s version of keg tubing. But then they got good.

Part 2: http://www.energiezukunft-fuer-deutschland.info/2015/06/racing-concrete-canoes-takes-both-physics-and-physiques-part-2/