Engineering
Nigeria's new works minister, David Umahi, is pushing for the use of rigid pavement in road construction, as against the flexible pavement predominantly in use. This, as the minister noted, is due to the precarious state ...
Nov 9, 2023
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Electronics & Semiconductors
In a recent study published in Advanced Energy Materials, a team of ANSTO scientists, led by Prof. Vanessa Peterson, used neutron scattering techniques to understand the formation of harmful lithium structures in rechargeable ...
Nov 3, 2023
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Energy & Green Tech
A coating technique long used in manufacturing of computer chips can potentially enable a battery to charge many more times over its lifetime and make it much easier to manufacture. Scientists at the U.S. Department of Energy's ...
Nov 1, 2023
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Engineering
Organic semiconductor materials are promising key technologies for the development of state-of-the-art optoelectronic components and are used in photovoltaics as well as in sensor technology and microelectronics. In order ...
Oct 19, 2023
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Engineering
Every day, there are more than 45,000 flights carrying 2.9 million airline passengers in the United States alone. While supporting this endeavor, aircraft are subjected to a variety of operational conditions from environmental ...
Oct 18, 2023
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Engineering
Research published in the International Journal of Vehicle Systems Modelling and Testing has investigated how the rolling resistance of bicycle tires against the road surface are most affected by ambient temperature and the ...
Oct 11, 2023
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Engineering
Scientists have found that concrete's compressive strength can be increased by 4.1% and its flexural strength by 3.4% by adding a small amount of coconut shell (only 5%). The material's performance increased by 6.1% compared ...
Oct 10, 2023
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Robotics
A team led by Northwestern University researchers has developed the first artificial intelligence (AI) to date that can intelligently design robots from scratch.
Oct 2, 2023
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Consumer & Gadgets
Researchers and policymakers are advocating all-electric housing to reduce energy bills and emissions. Using energy-efficient reverse-cycle air conditioners is a core element of the shift from gas.
Oct 2, 2023
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Engineering
A type of large insect known as a cicada is able to keep its wings clean of dust and dirt through a remarkable process that could be applied within modern technology.
Sep 28, 2023
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In mathematics, specifically in topology, a surface is a two-dimensional topological manifold. The most familiar examples are those that arise as the boundaries of solid objects in ordinary three-dimensional Euclidean space R3 — for example, the surface of a ball or bagel. On the other hand, there are surfaces which cannot be embedded in three-dimensional Euclidean space without introducing singularities or intersecting itself — these are the unorientable surfaces.
To say that a surface is "two-dimensional" means that, about each point, there is a coordinate patch on which a two-dimensional coordinate system is defined. For example, the surface of the Earth is (ideally) a two-dimensional sphere, and latitude and longitude provide coordinates on it — except at the International Date Line and the poles, where longitude is undefined. This example illustrates that not all surfaces admits a single coordinate patch. In general, multiple coordinate patches are needed to cover a surface.
Surfaces find application in physics, engineering, computer graphics, and many other disciplines, primarily when they represent the surfaces of physical objects. For example, in analyzing the aerodynamic properties of an airplane, the central consideration is the flow of air along its surface.
This text uses material from Wikipedia, licensed under CC BY-SA
