Picture a cool place, teeming with a multitude of hot bodies twirling about in rapidly changing formations of singles and couples, partners and groups, constantly dissolving and reforming.
That's a good description of the shells around dying stars, the place where newly formed elements make compounds and life takes off, said Katharina Lodders, Ph.D., research associate professor of earth and planetary sciences in Arts & Sciences at Washington University in St. Louis.
“The circumstellar environment is where chemistry happens for the very first time,” said Lodders. “It's the first place a newly synthesized element can do chemistry. It's a supermarket of things from dust to gas and dust grains to molecules and atoms.
Neuroscientists have long believed that vision is processed in the brain along circuits made up of neurons, similar to the way telephone signals are transferred through separate wires from one station to another. But scientists at Georgetown University Medical Center discovered that visual information is also processed in a different way, like propagating waves oscillating back and forth among brain areas.
“What we found is that signals pass through brain areas like progressive waves, back and forth, a little bit like what fans do at baseball games,” said the study’s corresponding author, Jian-young Wu, Ph.D., an associate professor in the Department of Physiology and Biophysics at Georgetown.
Taking a radically new approach to security and identity protection, University of Houston professors developed the URxD
face recognition software that uses a three-dimensional snapshot of a person’s face to create a unique identifier, a biometric.
Shown in government testing to be tops in its field, URxD can be used for everything from gaining access to secure facilities to authorizing credit card purchases. The identification procedure is as effortless as taking a photograph.
URxD leads the pack for 3D face recognition solutions based on the face’s shape, according to the results of the Face Recognition Vendor Test (FRVT 2006)
Urothelial cells are the specialised lining cells of the bladder that enable it to retain urine. The cells have a very low turnover rate, but scientists have found that if the bladder is damaged, the urothelial cells are able to rapidly re-grow to repair the wound. The researchers hope to harness this property to engineer new bladders.
The University of York researchers have developed a series of models that mean they can study human urothelial cells in the laboratory. Of these models, the most important is their development of a urothelial cell sheet that functions as it would in the bladder. When the researchers create a wound in this model, the cells regenerate to repair the damage - just as they would in the body.
Wal-Mart is successful and success often comes with criticism, especially from activist groups, but when it comes to going green, even huge success stories like Wal-Mart need some guidance, so they've been getting help from eco-friendly organizations including Greenpeace, World Wildlife International and Conservation International as they develop a broad strategy to improve sustainability efforts.
“We’re not looking for the same old answers,” said Nancy Nagle, director of development, “We’ve got to let go of some of our old, preconceived notions and look for input, not just for ourselves, but to pass along to our suppliers.”
Nagel described Wal-Mart’s three-pronged sustainability strategy; being supplied by 100% renewable energy, creating zero waste, and selling products that conserv
A single cannabis joint has the same effect on the lungs as smoking up to five cigarettes in one go, indicates research published ahead of print in the journal Thorax.
The researchers base their findings on 339 adults up to the age of 70, selected from an ongoing study of respiratory health, and categorised into four different groups.
These comprised those who smoked only cannabis, equivalent to at least one joint a day for five years; those who smoked tobacco only, equivalent to a pack of cigarettes a day for at least a year; those who smoked both; and those who did not smoke either cannabis or tobacco.