Showing 20 articles starting at article 321
< Previous 20 articles Next 20 articles >
Categories: Anthropology: General, Physics: Optics
Published Scientists ID burned bodies using technique used for extracting DNA from woolly mammoths, Neanderthals
(via sciencedaily.com) Original source A technique originally devised to extract DNA from woolly mammoths and other ancient archaeological specimens can be used to potentially identify badly burned human remains, according to research.
Published Scientists reveal how light behaves in formless solids
(via sciencedaily.com) Original source For a long time, it was thought that amorphous solids do not selectively absorb light because of their disordered atomic structure. A new study disproves this theory and shows that amorphous solids actually exhibit dichroism, meaning that they selectively absorb light of different polarizations.
Published A bright idea for recycling rare-earth phosphors from used fluorescent bulbs
(via sciencedaily.com) Original source Recycling facilities collect glass and mercury from thrown away fluorescent bulbs, but discarded lighting could also supply rare-earth metals for reuse. The 17 metals referred to as rare earths aren't all widely available and aren't easily extracted with existing recycling methods. Now, researchers have found a simpler way to collect slightly magnetic particles that contain rare-earth metals from spent fluorescent bulbs.
Published Climate change threatens thousands of archaeological sites in coastal Georgia
(via sciencedaily.com) Original source Thousands of historic and archaeological sites in Georgia are at risk from tropical storm surges, and that number will increase with climate change, according to a new study.
Published Experiment captures why pottery forms are culturally distinct
(via sciencedaily.com) Original source Potters of different cultural backgrounds learn new types differently, producing cultural differences even in the absence of differential cultural evolution. The research has implications for how we evaluate the difference of archaeological artifacts across cultures.
Published Researchers develop novel method to photosynthesize hydrogen peroxide using water and air
(via sciencedaily.com) Original source Researchers have developed a microporous covalent organic framework with dense donor-acceptor lattices and engineered linkages for the efficient and clean production of hydrogen peroxide through the photosynthesis process with water and air.
Published Light stimulates a new twist for synthetic chemistry
(via sciencedaily.com) Original source Molecules that are induced by light to rotate bulky groups around central bonds could be developed into photo-activated bioactive systems, molecular switches, and more.
Published Diamonds are a chip's best friend
(via sciencedaily.com) Original source New technologies aim to produce high-purity synthetic crystals that become excellent semiconductors when doped with impurities as electron donors or acceptors of other elements. Researchers have now determined the magnitude of the spin-orbit interaction in acceptor-bound excitons in a semiconductor. They broke through the energy resolution limit of conventional luminescence measurements by directly observing the fine structure of bound excitons in boron-doped blue diamond, using optical absorption.
Published Trapping and excitation of the simplest molecule
(via sciencedaily.com) Original source The simplest possible molecule H2+ was one of the very first molecules to form in the cosmos. This makes it significant for astrophysics, but also an important object of research for fundamental physics. It is difficult to study in experiments. However, a team of physicists has now succeeded in measuring the vibrations of the molecule with a laser.
Published Visual prosthesis simulator offers a glimpse into the future
(via sciencedaily.com) Original source Researchers have developed a simulator that enables artificial visual observations for research into the visual prosthesis. This open source tool is available to researchers and offers those who are interested insight into the future application.
Published Movies of ultrafast electronic circuitry in space and time
(via sciencedaily.com) Original source Researchers have successfully filmed the operations of extremely fast electronic circuitry in an electron microscope at a bandwidth of tens of terahertz.
Published Laser-focused look at spinning electrons shatters world record for precision
(via sciencedaily.com) Original source Nuclear physicists have shattered a nearly 30-year-old record for precision in electron beam polarimetry. The groundbreaking result sets the stage for high-profile experiments that could open the door to new physics discoveries.
Published Reimagining electron microscopy: Bringing high-end resolution to lower-cost microscopes
(via sciencedaily.com) Original source Researchers have shown that expensive aberration-corrected microscopes are no longer required to achieve record-breaking microscopic resolution.
Published Plant seed and fruit analysis from the biblical home of Goliath sheds unprecedented light on Philistine ritual practices
(via sciencedaily.com) Original source While many aspects of Philistine culture are well-documented, the specifics of Philistine religious practices and deities have long remained shrouded in mystery. A recent study contributes valuable new data to our understanding of the Philistine's ritual practices. The discovery of numerous plants in two temples unearthed at the site unraveled unprecedented insights into Philistine cultic rituals and beliefs -- their temple food ingredients, timing of ceremonies, and plants for temple decoration.
Published New world record for CIGS solar cells
(via sciencedaily.com) Original source A new record for electrical energy generation from CIGS solar cells has been reached. Scientists have achieved a 23.64 percent efficiency.
Published Measuring the properties of light: Scientists realize new method for determining quantum states
(via sciencedaily.com) Original source Scientists have used a new method to determine the characteristics of optical, i.e. light-based, quantum states. For the first time, they are using certain photon detectors -- devices that can detect individual light particles -- for so-called homodyne detection. The ability to characterize optical quantum states makes the method an essential tool for quantum information processing.
Published Photon upconversion: Steering light with supercritical coupling
(via sciencedaily.com) Original source Researchers have unveiled a novel concept termed 'supercritical coupling' that enables several folds increase in photon upconversion efficiency. This discovery not only challenges existing paradigms, but also opens a new direction in the control of light emission.
Published Biggest Holocene volcano eruption found by seabed survey
(via sciencedaily.com) Original source A detailed survey of the volcanic underwater deposits around the Kikai caldera in Japan clarified the deposition mechanisms as well as the event's magnitude. As a result, the research team found that the event 7,300 years ago was the largest volcanic eruption in the Holocene by far.
Published Charting new paths in AI learning
(via sciencedaily.com) Original source Physicists explore different AI learning methods, which can lead to smarter and more efficient models.
Published Scientists invent ultra-thin, minimally-invasive pacemaker controlled by light
(via sciencedaily.com) Original source A team of researchers has developed a wireless device, powered by light, that can be implanted to regulate cardiovascular or neural activity in the body. The feather-light membranes, thinner than a human hair, can be inserted with minimally invasive surgery and contain no moving parts.