The study is a continuation of a hypothesis that Unto K. Laine, Professor Emeritus, published three years ago on the origin of the sounds heard during the displays of the Northern Lights. His theory postulated that the sounds are generated when a magnetic storm causes charges in the temperature inversion layer of the lower atmosphere, to be discharged at an altitude of 70 to 80 metres.
Researchers at the University of Helsinki have discovered how regenerative capacity of intestinal epithelium declines when we age. Targeting of an enzyme that inhibits stem cell maintaining signaling rejuvenates the regenerative potential of an aged intestine. This finding may open ways to alleviate age-related gastrointestinal problems, reduce side-effects of cancer treatments, and reduce healthcare costs in the ageing society by promoting recovery.
A study led by scientists of the Universitat Autònoma de Barcelona (UAB) and the National Centre for Genomic Analysis (CNAG-CRG) from the Centre for Genomic Regulation (CRG) reveals the three-dimensional genomic structure of male germ cells and how this structure determines their function.
A paper by Research Associate Daria Khanolainen appeared in Quality Assurance in Education.
"The objective was to find out how ready the teachers are to implement the expected changes. That is, do they understand what is required of them, are they motivated to implement the federal educational standard, do they have the necessary resources, etc.," explains the author.
An unexplored cosmos of potential materials
The number of potential new materials that can be assembled from elements in the periodic table is immense - even if researchers were to limit themselves to the 40 to 50 elements that are non-toxic, eco-friendly, and available on Earth in sufficient quantities. These possibilities remain as yet for the most part unexplored.
UNIVERSITY PARK, Pa. -- A plastic bottle becomes a jacket, an aluminum can a bicycle. When consumers are reminded of the products that their recyclables can be turned into they are more likely to recycle, according to researchers at Penn State and Boston College.
Organic light-emitting diodes are components that no longer consist of compounds containing the semiconducting material gallium, but of so-called organic compounds in which carbon is a main component. Compared to conventional light-emitting diodes, however, the luminosity and lifetime of OLEDs are currently lower, which is why they represent a current field of research.
In very hot or cold environments, conventional tape can lose its stickiness and leave behind an annoying residue. But while most people can avoid keeping taped items in a hot car or freezer, those living in extreme environments such as deserts and the Antarctic often can't avoid such conditions. Now, researchers reporting in ACS' journal Nano Letters say they have developed a new nanomaterial tape that can function over a wide temperature range.
Regions of the Universe containing very few or no galaxies - known as voids - can help measure cosmic expansion with much greater precision than before, according to new research.
The study looked at the shapes of voids found in data from the Sloan Digital Sky Survey (SDSS) collaboration. Voids come in a variety shapes, but because they have no preferred direction of alignment, a large enough sample of them can on average be used as "standard spheres" - objects which should appear perfectly symmetric in the absence of any distortions.
Accountable care organizations (ACOs), the health care delivery model created by the Affordable Care Act in an effort to reduce Medicare costs while improving coordination and quality of care, typically rely on primary care providers (PCPs) to steer the boat.
"The central message has been that the providers within the ACO need to focus on delivering care through primary care providers," says Vishal Shetty, a University of Massachusetts Amherst Ph.D. student in the School of Public Health and Health Sciences.