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כתבות אחרונות מאתר 'Phys'
Phys

Inverse design: A new pathway to custom functional polymers‎

At a potluck, you ate the best chocolate chip cookie—golden-brown, thick and chewy. Unfortunately, you don't know who made the cookie to get the recipe from, so you decide to recreate it. Using forward design principles, you might randomly choose a recipe from dozens of options, bake and observe the resulting cookies. If they are too thin, you might start over with a new recipe, add more flour or chill the dough longer and make a new batch. An alternative method is to start from the cookie characteristics you want and ask: What recipe and baking settings will produce that type of cookie? This method is called inverse design.

15:08
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Phys

Researcher finds that telling the truth is correlated with better criminal justice outcomes‎

Research from a Bowling Green State University faculty member recently found that one of the best strategies in the context of the criminal justice system is an old-fashioned virtue: telling the truth. Thomas Mowen, Ph.D., an associate professor of sociology and research affiliate of the Center for Family and Demographic Research at BGSU, published a study in the journal Deviant Behavior that examined whether lying behaviors—purposely being deceitful in an attempt to gain an advantage—actually worked in the criminal justice system.

15:08
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Phys

Students discover new crab egg predator‎

After a year and a half of remote work and learning, UC Santa Barbara undergraduate students Sophia Lecuona Manos, Gabrielle Plewe, Carson Gadler and doctoral student Zoe Zilz returned to campus in late 2021 eager for some on-campus, hands-on research, an opportunity that was lost when COVID shut down universities and other public institutions in early 2020.

15:08
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Phys

Solar energy transforms polystyrene waste into valuable chemicals using sulfur‎

Turning waste into wealth may no longer be just a marketing slogan, as a team of researchers in China has found an eco-friendly way to do exactly that. The abundant sunlight our planet receives was put to use for transforming polystyrene waste, one of the world's largest plastic polluters, into useful chemicals that can help advance the semiconductor industry. By adding elemental sulfur (S₈), they converted the plastic waste into two useful molecules: 2,4-diphenylthiophene and 1,3,5-triphenylbenzene. The first can be transformed into materials used in optoelectronics and high-performance semiconductors, while the second has a unique, rigid planar structure that makes it a great building block for creating advanced functional materials.

15:08
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Phys

Nanoengineered spintronic device can store data in four different ways‎

Over the past decades, electronics engineers have been trying to develop increasingly smaller devices that can store information reliably, even when they are not powered on. A promising type of non-volatile memory device is spintronics, solid-state systems that store and process information leveraging the spin (i.e., an intrinsic form of angular momentum) of electrons.

13:37
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Phys

Large craters offer clues to the origin of asteroid 16 Psyche‎

Even 200 years after asteroid 16 Psyche was discovered, astronomers continue to puzzle over its formation. Psyche is the 10th-most massive asteroid in the main belt between Mars and Jupiter, and the largest known metallic asteroid, at 140 miles in diameter.

13:37
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Phys

Engineered lipid nanoparticles reprogram immune metabolism for better mRNA vaccines‎

The most common side effects of mRNA vaccines like the COVID-19 shot are well known: soreness, mild fever, and general malaise. Those symptoms, which typically resolve within days, are the natural result of the immune system activating. But what if they could be avoided?

12:06
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Phys

Charcoal records reveal 'unprecedented' wildfires in tropical peatlands during 20th century‎

A new study reveals an unprecedented increase in wildfires in tropical peatlands during the 20th century. "Unprecedented burning in tropical peatlands during the 20th century compared to the previous two millennia" is published in Global Change Biology.

12:06
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Phys

Dinos hatched eggs less efficiently than modern birds, researchers show‎

What do we really know about how oviraptors—bird-like but flightless dinosaurs—hatched their eggs? Did they use environmental heat, like crocodiles, or body heat from an adult, like birds? In a new Frontiers in Ecology and Evolution study, researchers in Taiwan examined the brooding behavior and hatching patterns of oviraptors. They also modeled heat transfer simulations of oviraptor clutches and compared hatching efficiency to modern birds. To do so, they experimented with a life-sized oviraptor incubator and eggs.

07:33
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