Showing 20 articles starting at article 1381

< Previous 20 articles        Next 20 articles >

Categories: Engineering: Biometric, Environmental: Ecosystems

Return to the site home page

     (via sciencedaily.com) 

New research describes a dynamic climate and vegetation model that explains when regions across Africa, areas of the Middle East, and the Mediterranean were wetter and drier and how the plant composition changed in tandem, possibly providing migration corridors throughout time.

     (via sciencedaily.com) 

Police have long relied on the unique whorls, loops or arches encoded in fingerprints to identify suspects. However, they have no way to tell how long ago those prints were left behind -- information that could be crucial to a case. A preliminary new study suggests that could change. Researchers report that they could link compounds contained in fingerprints with their age.   

     (via sciencedaily.com) 

Recent studies have shown metallic objects have their own magnetic fingerprints based on size, shape and physical composition. Scientists look to leverage these observations to potentially create a smaller and cheaper system that is just as effective as their larger counterparts.

     (via sciencedaily.com) 

New research provides evidence from Siberian caves suggesting that summer sea ice in the Arctic Ocean plays an essential role in stabilizing permafrost and its large store of carbon.

     (via sciencedaily.com) 

The smuggling of contraband is a threat in airport security and risks have increased in modern times with the uptick in parcel delivery, but security inspection methods have not seen any significant improvements. Researchers propose a technique for efficient detection of contraband items. Typically, airport security uses X-ray imaging to quickly scan baggage, but this suffers limitations. To address this, luggage with suspicious X-ray results undergoes supplementary screening using energy-dispersive X-ray diffraction.

     (via sciencedaily.com) 

Currently, the detection of food poison outbreaks caused by bacteria takes a long time and is expensive, but this does not have to be the case in the future. Researchers have found a method for the precise identification of bacteria in just a few hours on a mobile-phone-sized device that costs about 200 times less than alternative approaches.

     (via sciencedaily.com) 

Researchers have investigated how the illumination of bat caves affects the animals' behavior and whether the color of light makes a difference on their flight. Although red light irritates the small mammals somewhat less than white light, from the researchers' point of view neither the entrance nor the interior of bat caves should be illuminated if bats are present.

     (via sciencedaily.com) 

A new study by geoscientists and climatologists provides evidence that summer monsoons from Asia and Africa may have reached into the Middle East for periods of time going back at least 125,000 years, providing suitable corridors for human migration.

     (via sciencedaily.com) 

A new cancer-detecting tool uses tiny circuits made of DNA to identify cancer cells by the molecular signature on their surface. The circuits work by attaching to the outside of a cell and analyzing it for proteins that are more abundant on some cell types than others. The devices distinguish cell types with higher specificity than previous methods, giving researchers hope their work could improve diagnosis, or give cancer therapies better aim.

     (via sciencedaily.com) 

Researchers investigate and describe the conservation importance of buildings relative to natural, alternative roosts for little brown bats in Yellowstone National Park.

     (via sciencedaily.com) 

The Neo-Assyrian Empire, centered in northern Iraq and extending from Iran to Egypt -- the largest empire of its time -- collapsed after more than two centuries of dominance at the fall of its capital, Nineveh, in 612 B.C.E. Despite a plethora of cuneiform textual documentation and archaeological excavations and field surveys, archaeologists and historians have been unable to explain the abruptness and finality of the historic empire's collapse.

     (via sciencedaily.com) 

A state-of-the-art fingerprint detection technology can identify traces of heroin on human skin, even after someone has washed their hands -- and it is also smart enough to tell whether an individual has used the drug or shaken hands with someone who has handled it.

     (via sciencedaily.com) 

Researchers have developed a quantum communication chip that is 1,000 times smaller than current quantum setups, but offers the same superior security quantum technology is known for.

     (via sciencedaily.com) 

Identifying geological features in a densely vegetated, steep, and rough terrain can be almost impossible. Imagery like LiDAR can help researchers see through the tree cover, but subtle landforms can often be missed by the human eye.

     (via sciencedaily.com) 

A research team is developing EarEcho, a biometric tool that uses modified wireless earbuds to authenticate smartphone users via the unique geometry of their ear canal. A prototype of the system proved roughly 95% effective.

     (via sciencedaily.com) 

Scientists have designed an ultra-miniaturized device that could directly image single cells without the need for a microscope or make chemical fingerprint analysis possible from a smartphone.

     (via sciencedaily.com) 

Scientists, studying evidence preserved in speleothems in a coastal cave, illustrate that more than three million years ago -- a time in which the Earth was two to three degrees Celsius warmer than the pre-industrial era -- sea level was as much as 16 meters higher than the present day.

     (via sciencedaily.com) 

A new chip-based platform integrates nanopores and optofluidic technology with a feedback-control circuit to enable an unprecedented level of control over individual molecules and particles on a chip for high-throughput analysis.

     (via sciencedaily.com) 

A new test could help police to determine when criminals or witnesses are lying about their knowledge of a person's identity.

     (via sciencedaily.com) 

Well-known for its unique landscapes and rare wildlife, the Koytendag State Nature Reserve was yet to reveal the scale of its actual biodiversity when a series of international expeditions.