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Showing posts with label Nima Arkani-Hamed. Show all posts
Showing posts with label Nima Arkani-Hamed. Show all posts

Monday, May 8, 2017

The Future of Heavy Equipment


Futurology

Frequently when we are thinking about the future, we are thinking about the very small, from nanotechnology to microscopy advances. But technology to come will also be produced at scales that are unfathomable to us now. 


When it come to large-scale engineering, the future may put some of our current accomplishments far behind them. From architecture, to space travel to science, technological developments promise to unleash huge new machinery possibilities.

Architecture

Skyscrapers in the future promise to push much higher up than those on the planet today. The developing world is where many of these buildings will be constructed. For instance, China will be home to 21 of the world's tallest 50 skyscrapers by 2020, and Dubai is already well known for the impressively tall Burj Khalifa and other tall buildings. 

The Jeddah Tower, under construction in Jeddah, Saudi Arabia, will at completion in 2020 reach unprecedented heights becoming the tallest building in the world, as well as the first structure to reach the one-kilometre-high mark.

Jeddah Tower

The structure will be home to the world’s highest observatory. It will also have a separate, 98-foot-diameter outdoor balcony, which was originally intended to be a helipad.

Tall building construction requires massive machinery too, from the construction vehicles and cranes, to the elevators, and building services inside the structures. 

As vertical farming becomes more viable and profitable, the machinery and automation required for massively tall farms will make hydroponics today look infantile. 

The future needs very large buildings too.  Tesla's battery production facility now under construction in Nevada is called the 'Gigafactory.' 

Tesla Gigafactory

At a planned production rate of 500,000 cars per year in the latter half of this decade, Tesla alone will require today’s entire worldwide production of lithium ion batteries. The Tesla Gigafactory was kicked-off from the company's necessity and will supply enough batteries to support projected electric vehicle demand.

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Also, building and construction in the future may be as much about what is going on under the Earth's surface as above. Tunnel boring machines are already massive machines. For instance, Seattle's Alaskan Way Viaduct construction recently used the world’s largest tunnel borer: a 300-foot long, 7,000 ton, five stories-high driller named Bertha.

What might be a bigger overall impact though may be the scale of tunneling projects themselves. Elon Musk, for instance recently outlined his plans to bore many tunnels under Los Angeles as a way to alleviate traffic congestion.

Mining

Mining equipment is historically very large, and the pinacle of earth moving was Germany's Bagger 293, a giant bucket-wheel excavator built in 1995. At around 315 feet tall, 740 feet long, and weighing over 31 million pounds, the machine required a crew of five to operate and could move over 8.5 million cubic feet of earth per day. 

Bagger 293

To put that in perspective, that is the equivalent of digging a hole the length of a football field and over 80 feet deep in a day.

While coal mining is hopefully not going to be in huge demand in the future, there will no doubt descendants to the massive machines the industry uses.

Space

The space industry has historically been behind some of the largest equipment ever made. This is not only referring to the spaceships themselves, but to the machines used to make, test and train astronauts. From NASA's Super Guppy transport plane that carries spaceships, to the clean rooms used to build satellites, space is all about scale.

Super Guppy

With the commercialization of the industry, the pattern is not always for smaller, cheaper, faster either.

The Interplanetary Transport System (ITS) proposed by SpaceX to ferry people and equipment to and from Mars would involve truly gargantuan equipment. The proposed vehicle launch stack, is taller and wider than the Apollo Saturn V, the previous (and still largest) rocket ever.

SpaceX Mars Vehicle

Although only a small portion of the SpaceX workforce is being committed to the ITS system, the company was able to produce a full-scale development upper stage spaceship liquid oxygen tank. It is made of an advanced carbon fiber composite.

SpaceX Large equipment

Robotics

Robotics is already a huge economic force, and in the future, the size of this industry's impact will also be matched by the size of robotic devices and machines. Already, the largest earth-moving and mining equipment is nearly self driving. 

Increasingly machines from the other categories in this list, and others like agriculture will see increasing automation and incorporation of robotics technologies. These devices will need a variety of electronics and sub-components like a donaldson air filter.

robot tractor


Within the next decade, farming as we know it is expected to be revolutionized by the use of self-driving tractors and robots that can perform time-consuming tasks now done by people. Much of the same work that is being put to used to make self driving cars a reality can be repurposed for farming, construction and other activities, and these machines may grow in scale as a consequence.  

Heavy equipment of all kinds may eventually begin to move in the direction of artificial intelligence, as we usher in a new era of technology.  Soon advances in robotics may find robotic bulldozers that can operate themselves independent of a human driver may become an common thing at construction sites of the future.

Science

The Large Hadron Collider (LHC) in Switzerland is the largest science experiment to date, and the real estate occupied by the machine is immense. Ironically, this massive device has been built to detect the smallest particles in existence. The particle accelerator is built within a circular tunnel, with a circumference of 27 kilometres (17 mi), at a depth ranging from 50 to 175 metres (164 to 574 ft) underground.

Large Hadron Collider

Already plans are underway to build even larger particle accelerators. In one design, the accelerator ring would be 100 kilometres around and run at seven times the energy of the Large Hadron Collider. The discovery/confirmation of the Higgs boson at the LHC has physicists eager to further the exploration of elementary particles.

Nima Arkani-Hamed, a professor of physics at the Institute for Advanced Study in Princeton is one of those leading the charge to build a super-sized accelerator.
Nima Arkani-Hamed large particle accelerator
http://susy2013.ictp.it/lecturenotes/06_Saturday/Arkani-Hamed.pdf

Arkani-Hamed’s argument is that particle physics is entering a new phase. With the discovery of the Higgs, the Standard Model has effectively been completed. The theory predicted the outcomes of all known particle experiments. However difficult aspects of the model still prevail. For instance, even the short form of the equations used to describe it fill a page and are riddled with arbitrary parameters. The next generation of accelerators will have a different theoretical goal than prior ones: not to fill in the structure, but to understand it.

The onset of artificial intelligence has already crept in to today’s society in many different ways, and we can expect that heavy equipment of the future allow this type of technology to become ubiquitous. Combined with scale, the future of heavy equipment will be much different than today.


By  33rd SquareEmbed





Thursday, September 19, 2013

amplutihedron

 
Physics
Physicists have discovered the amplituhedron — a geometric object that dramatically simplifies calculations of particle interactions and does not require space and time as part of the inherent calculations.




Physicists have discovered the
amplituhedron — a geometric object that dramatically simplifies calculations of particle interactions and does not require space and time as part of the inherent calculations.

The amplituhedron makes quantum physics calculations much simpler than anything that has been done before, replacing hundreds of pages of Feynman diagrams in some cases.

The revelation that particle interactions, the most basic events in nature, may be consequences of geometry significantly advances a decades-long effort to reformulate quantum field theory, the body of laws describing elementary particles and their interactions.

“The degree of efficiency is mind-boggling,” said Jacob Bourjaily, a theoretical physicist at Harvard University and one of the researchers who developed the new idea. “You can easily do, on paper, computations that were infeasible even with a computer before.”

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The new geometric version of quantum field theory could also aid the search for a theory of quantum gravity that would seamlessly connect the large- and small-scale pictures of the universe. Attempts thus far to incorporate gravity into the laws of physics at the quantum scale have run up against nonsensical infinities and deep paradoxes. The amplituhedron, or a similar geometric object, could help by removing two deeply rooted principles of physics: locality and unitarity.

“Both are hard-wired in the usual way we think about things,” said Nima Arkani-Hamed, a professor of physics at the Institute for Advanced Study in Princeton, N.J., and the lead author of the new work, which he is presenting in talks (see below) and in a forthcoming paper. “Both are suspect.”

Locality is the notion that particles can interact only from adjoining positions in space and time. And unitarity holds that the probabilities of all possible outcomes of a quantum mechanical interaction must add up to one. The concepts are the central pillars of quantum field theory in its original form, but in certain situations involving gravity, both break down, suggesting neither is a fundamental aspect of nature.

In keeping with this idea, the new geometric approach to particle interactions removes locality and unitarity from its starting assumptions. The amplituhedron is not built out of space-time and probabilities; these properties merely arise as consequences of the jewel’s geometry. The usual picture of space and time, and particles moving around in them, is a construct.

“It’s a better formulation that makes you think about everything in a completely different way,” said David Skinner, a theoretical physicist at Cambridge University.

The amplituhedron itself does not describe gravity. But Arkani-Hamed and his collaborators think there might be a related geometric object that does. Its properties would make it clear why particles appear to exist, and why they appear to move in three dimensions of space and to change over time.

Because “we know that ultimately, we need to find a theory that doesn’t have” unitarity and locality, Bourjaily said, “it’s a starting point to ultimately describing a quantum theory of gravity.”



SOURCE  Simons Foundation

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