Automotive

Study compares benefits of scooter-sharing vs. bike-sharing

While ridesharing services like Grab, Uber and Gojek have become a pervasive part of life, many countries in the Asia Pacific are still unconvinced when it comes to micro-mobility such as bike and scooter-sharing. While convenient, ...

Computer Sciences

Scientists create application for finding parking spaces

Computer vision and image recognition could solve the problem of a shortage of parking spaces in Chelyabinsk. As part of the work on the Smart City program, scientists from South Ural State University proposed using the already ...

Automotive

Parking sensors

Even in the middle of a pandemic lockdown, finding a good parking space can be a painful task. Now, work published in the International Journal of Sensor Networks, offers a new approach to parking space allocation based on ...

Energy & Green Tech

Perovskite and organic solar cells rocketed into space

For the first time, researchers in Germany sent perovskite and organic solar cells on a rocket into space. The solar cells withstood the extreme conditions in space, producing power from direct sunlight and reflective light ...

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Space

Space is the boundless, three-dimensional extent in which objects and events occur and have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of the boundless four-dimensional continuum known as spacetime. In mathematics spaces with different numbers of dimensions and with different underlying structures can be examined. The concept of space is considered to be of fundamental importance to an understanding of the universe although disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.

Many of the philosophical questions arose in the 17th century, during the early development of classical mechanics. In Isaac Newton's view, space was absolute - in the sense that it existed permanently and independently of whether there were any matter in the space. Other natural philosophers, notably Gottfried Leibniz, thought instead that space was a collection of relations between objects, given by their distance and direction from one another. In the 18th century, Immanuel Kant described space and time as elements of a systematic framework which humans use to structure their experience.

In the 19th and 20th centuries mathematicians began to examine non-Euclidean geometries, in which space can be said to be curved, rather than flat. According to Albert Einstein's theory of general relativity, space around gravitational fields deviates from Euclidean space. Experimental tests of general relativity have confirmed that non-Euclidean space provides a better model for explaining the existing laws of mechanics and optics.

This text uses material from Wikipedia, licensed under CC BY-SA