Humanities & Social Sciences • Science • Technology • Weekly Selection
Mars atmosphere stripped away by solar storms Solar storms have been stripping away the air on Mars, according to data collected by NASA’s Maven spacecraft. Researchers say this could help explain why Mars’ atmosphere became so thin so rapidly, turning a once warm planet with liquid water into the dry, desolate landscape it is today […]
People who are diagnosed with dementia may initially report problems on memory and/or language that affect their activities of daily living. Once factors such as depression, delirium, or mild cognitive impairment, are disregarded, these people are typically referred to a neurologist, radiologist, and neuropsychologist or speech therapist who will help them to understand the reason […]
In nature, light harvesting organisms make extensive use of energy and electron transfer between adjacent molecules. Thus, in the photosynthetic cell of an algae, bacterium, or plant, there are light-sensitive molecules called chromophores, which contain a π-conjugated system (a system with alternate single and double bonds), arranged in an antenna-shaped structure named a photocomplex. When […]
A hot topic of research nowadays is the energy transfer in quantum systems. One important reason for this interest is the famous 2007 experiment that suggests quantum effects in the dynamics of the photosynthetic complex FMO, from the green sulfur bacteria . This complex plays a crucial role in natural photosynthesis transferring an excitation from […]
Metacognition is «cognition about cognition», or «knowing about knowing». It comes from the root word «meta», meaning beyond, and the word «cognition» that includes all mental abilities and processes related to knowledge: attention, memory, judgment and evaluation, reasoning, biological computation, problem-solving, decision making, comprehension and production of language, etc. Metacognition can take many forms; it […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Nerve cells that block itches in mice Scientists have found nerve cells in mice that can block itches caused by a light touch, which could one day lead to treatments for people suffering from chronic itch problems. Researchers genetically engineered mice without those spinal cord nerve cells, producing rodents that had the urge to scratch […]
In the previous articles (I, II), we have characterized the simplest class of supersymmetric heterotic compactification backgrounds. In particular, we have finished the second article with the following result: There is a class of admissible Heterotic internal manifolds characterized as being six-dimensional, oriented, spin, Riemannian compact manifolds admitting a parallel spinor respect to the Levi-Civita […]
With “many-body problem” we usually make reference to one that is very difficult to obtain exact solutions for, because the system involves interactions between more than two bodies. This kind of problem appears both in classical and quantum systems. In order to understand the physics of many-body systems, it is necessary to make use of […]
Sleep has a critical function in metabolic homeostasis. Its restorative function may be a consequence of the enhanced removal of potentially neurotoxic waste products that accumulate in the awake central nervous system . The glymphatic system is a functional waste pathway involved in this clearance in the mammalian central nervous system. The pathway consists of: […]
In recent years, when I enter into a bakery my decision of which bread to buy is getting more and more complicated because of the high variety of bread available. Bread is “in appearance” a simple product just made out of flour, yeast and water mixed together and baked. Of course, the complexity of bread […]