A region containing a maximum of potential that prevents a particle on one side of it from passing to the other side is called a potential barrier. The net in a tennis court is in a certain way a potential barrier, as the ball needs to have kinetic energy in excess of the height of […]
Departamento de Bioquímica y Biología molecular-A, Facultad de Biología, Universidad de Murcia, E-30100 Murcia, Spain * adrian.matencio@um.es Antimicrobial resistance is a problem in our society. Although several authors have focused on seeking new molecules with antimicrobial activity, resistance has increased. Several authors are looking for new antimicrobial substances or seeking to improve the use of […]
The article Weaponized Health Communication: Twitter Bots and Russian Trolls Amplify the Vaccine Debate , published in 2018 , affirms that, despite the great potential of social networks to disseminate objective information, they are often abused in order to disseminate content that may harm health. A direct consequence of the exposure of social network users […]
Galaxy collisions can sometimes eject supermassive black holes Researchers are on the lookout for supermassive black holes that ended up off-center or got kicked out of their galaxies completely when galaxies merged. The European Space Agency’s launch of its Laser Interferometer Space Antenna in about 15 years could help identify displaced black holes and help […]
The concept of vector should be familiar: a quantity for which both magnitude and direction must be stated. This compares with a scalar quantity, where direction is not applicable, like temperature in a precise point. But, what if the magnitude varies with the direction? A vector would be a particular case, with only one direction […]
The term dyscalculia of the development was proposed for the first time in 1968 by Cohn to describe a learning problem centered in the mathematical operations and in the handling of the numbers. Affected people have serious and chronic difficulties when adding or subtracting and also in the management of the calendar and clock. Dyscalculia […]
In the past entry we examined how “out-of-body experiences” (OBEs) might have an influence in the belief in a “soul” separated from the body. Now we shall take a look to the other two types of “abnormal” psychological experiences that are surely related to that belief: “near-death experiences” (NDEs) and “mystical experiences” (MEs). Near-death experiences […]
How neural network guides autonomous car’s turns An autonomous car was trained to negotiate high-speed turns without losing control. A neural network based on more than 200,000 motion samples of driving on various surfaces at high speeds was used in the self-driving system. New Scientist Cassini dive helps shed light on Saturn’s ring moons The […]
The so-called van der Waals materials consist of two-dimensional layers bound by weak van der Waals forces. After the isolation of graphene, the field of two-dimensional van der Waals materials has experienced an explosive growth and new families of two-dimensional systems and block-layered bulk materials, such as tetradymite-like topological insulators – electronic materials that have […]
During the second half of the 80s, when no one knew those years would become the Soviet Union’s last, Mikhail Gorbachev attempted some economic reforms without much success. Less than one decade earlier, in 1978, Deng Xiaoping started a series of reforms that secured not only economic growth, but also the rule of Chinese communist […]