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94 articles from PhysOrg

New piezoelectric material remains effective to high temperatures

Piezoelectric materials hold great promise as sensors and as energy harvesters but are normally much less effective at high temperatures, limiting their use in environments such as engines or space exploration. However, a new piezoelectric device developed by a team of researchers from Penn State and QorTek remains highly effective at elevated temperatures.

Feed Fido fresh human-grade dog food to scoop less poop

For decades, kibble has been our go-to diet for dogs. But the dog food marketplace has exploded in recent years, with grain-free, fresh, and now human-grade offerings crowding the shelves. All commercial dog foods must meet standards for complete and balanced nutrition, so how do consumers know what to choose?

Scientists discover plants' roadblock to specialty oil production

Hundreds of naturally occurring specialty fatty acids (building blocks of oils) have potential for use as raw materials for making lubricants, plastics, pharmaceuticals, and more—if they could be produced at large scale by crop plants. But attempts to put genes for making these specialty building blocks into crops have had the opposite effect: Seeds from plants with genes added to make specialty...

State-funded pre-K may enhance math achievement

In the first longitudinal study to follow Georgia pre-K students through middle school, Stacey Neuharth-Pritchett, associate dean for academic programs and professor in UGA's Mary Frances Early College of Education, found that participating in pre-K programs positively predicted mathematical achievement in students through seventh grade.

Nanotech plastic packaging could leach silver into some types of foods and beverages

Antimicrobial packaging is being developed to extend the shelf life and safety of foods and beverages. However, there is concern about the transfer of potentially harmful materials, such as silver nanoparticles, from these types of containers to consumables. Now, researchers reporting in ACS Applied Materials & Interfaces illustrate that silver embedded in an antimicrobial plastic can leave the...

New ink jet approach offers simple way to print microdisk lasers for biosensing

Researchers have developed a unique inkjet printing method for fabricating tiny biocompatible polymer microdisk lasers for biosensing applications. The approach enables production of both the laser and sensor in a room temperature, open-air environment, potentially enabling new uses of biosensing technologies for health monitoring and disease diagnostics.

Drone and landsat imagery shows long-term change in vegetation cover along intermittent river

In the Namib Desert in southwestern Africa, the Kuiseb River, an ephemeral river which is dry most of the year, plays a vital role to the region. It provides most of the vegetation to the area and serves as a home for the local indigenous people, and migration corridor for many animals. The overall vegetation cover increased by 33% between 1984 and 2019, according to a Dartmouth study published in...

Fungus that eats fungus could help coffee farmers

Coffee rust is a parasitic fungus and a big problem for coffee growers around the world. A study in the birthplace of coffee—Ethiopia—shows that another fungus seems to have the capacity to supress the rust outbreaks in this landscape.

A team of climatologists is studying how to minimize errors in observed climate trend

The instrumental climate record is the cultural heritage of humankind, the result of the diligent work of many generations of people all over the world. However, the changes in the way in which temperature is measured, as well as the environment in which weather stations are located can produce spurious trends. An international study carried out by researchers from the Universitat Rovira i Virgili...

Marmoset monkeys eavesdrop and understand conversations between other marmosets

Humans continuously observe and evaluate interactions between third parties to decide with whom to interact in the future. But it is difficult to measure what information animals gain when they eavesdrop on vocal interactions between conspecifics: If they do understand such conversations, they do not necessarily exhibit behavioral expressions that can be easily observed. To overcome this hurdle,...

13-year analysis sheds new light on wheat crop disease patterns in Ethiopia

A new study of wheat rust—a fungal disease that can harm wheat crops—identifies previously unknown long-term trends and hotspots for wheat rust outbreaks in Ethiopia. A team of modelers from the University of Cambridge and the Universität Hamburg, along with surveillance experts from CIMMYT, EIAR and agricultural universities in Ethiopia, present these findings in the open-access journal PLOS...

Scientists believe studies by colleagues are more prone to biases than their own studies

The properties of human mind affect the quality of scientific knowledge through the insertion of unconscious cognitive biases. Scientists from the University of Turku, Finland, have found that the current level of awareness about research biases is generally low among ecology scientists. Underestimation of the risks associated with unconscious cognitive biases prevents avoiding these risks in a...

Sneakerheads, not hypebeasts: Defining a sneaker-driven sub-culture

Sneakers can be about style, history and even community. A new study reveals that for "Sneakerheads," sneakers are an important facet of their identities, particularly for African-American men who grew up in the 1970s and '80s coveting sneakers popularized by hip-hop stars and basketball legends.

Study finds consensus for arming school resource officers, division on arming teachers and other staff

In the wake of repeated school shootings across the United States, today's youth have been called the mass shooting generation. A new study examined public support for arming school employees. The study found consensus for arming school resource officers, but division over whether to arm teachers and nonteaching staff. The research has clear implications for policy, including the possibility that...

Quantum tunneling in graphene advances the age of terahertz wireless communications

Scientists from MIPT, Moscow Pedagogical State University and the University of Manchester have created a highly sensitive terahertz detector based on the effect of quantum-mechanical tunneling in graphene. The sensitivity of the device is already superior to commercially available analogs based on semiconductors and superconductors, which opens up prospects for applications of the graphene...

Fish in warming Scottish seas grow faster but reach a smaller size

Researchers have found new evidence that global warming is affecting the size of commercial fish species, documenting for the first time that juvenile fish are getting bigger, as well as confirming that adult fish are getting smaller as sea temperatures rise. The findings are published in the British Ecological Society's Journal of Applied Ecology.