Anything made out of paper is generally thought to be structurally weak, but with skilful folding, paper can gain unexpected strength.
The Japanese art of origami, or paper folding, has long been admired for its ingenuity, but this traditional pastime is now providing the basis for the foundation of a new technology. Two years ago, Professor Hideyuki Ohtaki, a teacher in mechanical engineering at Saitama University, and his students began conducting research into paper structures. They discovered that long triangular cylinders threaded horizontally through a collection of hexagons produced a strong structure that resisted twisting -- strong enough to hold the weight of a person. A tricycle made entirely out of recycled paper, using joints made from paper cups, was among the objects built to demonstrate the strength of their chosen material. With a fire and water resistant coating, paper could be used in unique ways giving it new options for the years ahead.
CU flimsy pieces of paper;
Paper being folded into strong structure;
Strong paper taking weight of apple;
Exterior of Saitama University;
Interior shot of researchers in meeting;
SOT Professor Hideyuki Ohtaki: "Compared to metals, paper is extremely light-weight and easy to recycle. These advantages create various possibilities for the use of strong paper structures."
Student cutting out paper shapes,
CU paper structure being made on desk,
CU completed structure, strength of structure being demonstrated;
Person standing on strong paper structure;
VS tricyle made from paper;
VS strong paper structures;
VS of paper structures.
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Patients taking Viagra are less likely to suffer a heart attack, new research claims.
Men taking the impotence drug were found to have a lower risk of having a heart attack or dying from heart failure than those not on the medication.
The findings mean Viagra could soon be used to treat hundreds of thousands of heart failure patients and even prevent fatal heart attacks, scientists say.
Experts from the University of Manchester studied 6,000 diabetic patients who had been given Viagra to treat erectile dysfunction.
The drug relaxes muscle cells in the blood vessels supplying the penis, allowing more blood to flow there.
This increased blood flow increases the likelihood of getting an erection.
Given the increasing reports of deaths in which the use of Viagra may be implicated, clinicians need to exercise caution when advising their patients with heart
Experts believe a key ingredient in Viagra called PDE5i, which relaxes blood vessels, also prevents damage to heart cells.
Heart failure is caused by the heart failing to pump enough blood around the body at the right pressure.
It most often occurs because the heart muscle has become too weak or stiff to work properly and is usually treated with medication which supports the heart.
Despite diabetics being prone to heart problems, the study participants did not suffer as many incidents as similar patients not on the drug.