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http://arxiv.org/abs/1103.4269
www.nationmw.net/index.php
xls117.blogr.com/stories/2010-04-29-Niobium/
mysteriousall.blogspot.com/2010/03/lhc-will-cause-revolution-in-metallurgy.html
www.equitybulls.com/admin/news2006/news_det.asp
joongangdaily.joins.com/article/view.asp


CBMM and Ferro Tech organize symposium on niobium bearing structural steels in New Delhi
Wednesday, 20 Apr 2011
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CBMM Brazil, a major producer of the micro alloying element niobium, together with Ferro Tech India, their principal and sole distributor of ferroniobium in India and Russia, held an International Symposium on Niobium Bearing Structural Steels in New Delhi from April 12th to April 14th011.

The symposium gathered world leading experts in the area of production, design and application of high strength structural steels covering the main sectors of high rise buildings, bridges, ship building, pressure vessels, wind towers, power generation and transmission etc. A total of 28 technical papers were presented and discussed by approximately 70 delegates comprising of leading Indian and overseas steelmakers, structural engineers, architects, regulatory authorities as well as education institutions.

Key areas of discussions centered on the value adding role of micro alloying with niobium for high strength constructional steels, providing significant cost saving opportunities as well as benefits to the steel application. Of specific interest was the positive role of high strength niobium structural steels in fire resistant and seismic resistant applications for building construction. In addition, delegates expressed considerable interest in the ability of Indian and overseas steelmakers to supply niobium high strength constructional steels along with its value adding capability.

Most of the participants agreed that the use of high strength steels in construction applications is rapidly increasing. Examples were provided from a number of projects from around the world using niobium high strength steels. Domestic delegates acknowledged the current opportunity for India to take advantage of such niobium bearing steels as other world countries have.

The Indian government is planning to invest over USD 1 trillion for development of infrastructure in India during the 12th Five Year Plan period between 2012 and 2017. Through the use of high strength niobium bearing structural steels, designers and engineers will have the opportunity to build more with less, saving scarce resources, building faster, allowing significant cost and time savings and permitting more architectural challenging and safer structures.

It may also be noted that CBMM and Aurohill, Ferro Tech’s sub agent in Russia, held a seminar on high strength line pipe steel and an industry round table discussion in Russia last week as well.

arXiv blog
Superconducting Niobium Chip Smashes Silicon Power Consumption Standards

A superconducting logic chip with a clock speed of 6 GHz beats silicon energy efficiency by two orders of magnitude

kfc 03/24/2011

* 3 Comments

When it comes to energy efficiency, today's computers eat up some eight orders of magnitude more than the theoretical minimum. Clearly, there's room for improvement.

Today, Quentin Herr and pals at Northrop Grumman Systems in Baltimore reveal a superconducting logic device that uses 300 times less power than conventional silicon chips. That'll be a shock to chip-makers whose attempts at energy efficiency improvements pale in comparison.

The laws of physics help, of course. The power dissipated by a conventional transistor depends on its size and on the material from which it is made.

By comparison, the energy dissipated by the superconducting equivalent, the Josephson junction, is determined only by thermal noise, the system being entirely free of the troublesome resistance that eats up energy in conventional devices.

To exploit this, Herr and co developed and built a new type of device known as a reciprocal quantum logic chip. Their superconducting chip is made of niobium, operates at 4.2 kelvin and consists of 1600 Josephson junctions .

They say it can operate at clock speeds of 6 Ghz with a 6 mW power supply, that faster speeds are possible and that this performance can scale to chips with a million junctions. And it does it with a bit error rate of less than 10^-40. That's practically nothing.

But the jaw dropper is the power consumption which is only three orders of magnitude above the theoretical limit.
That isn't the wall plug power consumption, of course, since the hefty cost of cooling has to be taken into account. But even when it is, Herr and co say the new device outperforms silicon power consumption by a factor of 300.

That makes superconducting logic a tempting option for high end computing, for which energy bills are a considerable cost. In 2007, US Environmental Protection Agency calculated that servers and data centres in the US eat up some 12 GW of power, equivalent to the output of 25 power plants. Cutting that by a factor of 300 would save a few dollars.

Niobium also offers an interesting extra. It is naturally radiation hard meaning that these chips might be particularly well suited to operating in space or other highly radioactive environments. That's the kind of thing that can help to generate military funding. Indeed, Herr and co's work was funded in part by the Defense MicroElectronics Activity, a military research organisation based in Sacramento.

Interestingly, the device might also be easily converted to work in the quantum computing regime, simply by cooling it down to a few millikevin. That could make it a useful stepping stone towards quantum technologies.

That this technology has come out of Northrop is something of a surprise. This is a company that makes the Global Hawk UAV and the B-2 bomber along with many other military technologies. However, Herr's work suddenly makes it a player in the world of next generation computing. It'll be interesting to see where this goes
Ref: arxiv.org/abs/1103.4269: Ultra-Low-Power Superconductor Logic