electricity

Ten Ways We Can Help Keep NYC From Drowning Under Water

Source: http://www.businessinsider.com/clean-energy-sources-to-reduce-effects-of-climate-change-2012-10

Manhattan Future

The best scientific evidence shows that global climate change is caused by burning fossil fuels (oil, coal, and natural gas), which emit carbon dioxide and other greenhouse gases into the atmosphere.

These greenhouse gases act like a bubble around the Earth, trapping heat in, and in turn, causing temperatures to rise on the planet’s surface. This phenomenon can be observed through shrinking glaciers, thawing of permafrost, rising sea levels and, yes stronger storms

See how we can beat climate change >

Superstorm Sandy brought unprecedented levels of flooding to areas across the Eastern seaboard. New York City and the Jersey Shore were particularly hard hit. In Manhattan, a record-breaking storm surge reached 14 feet, shuttering one of the largest transit systems in the world.

Although climate change did not cause the storm, a growing number of researchers say that climate change increases the severity of hurricanes, including stronger storm surges like the one in Manhattan. This on top of rising sea levels, which will leave many cities, including New York, partially underwater, means just one thing: To save our cities, we need to slow climate change. 

To moderate the effects of climate change we must start by lowering greenhouse gas emissions, which involves investing in clean and renewable energies.    

Renewable energy is energy that comes from natural resources such as sunlight, wind, tides and geothermal heat. Unlike oil, these energy sources won’t run out (although some are highly unpredictable) and carbon-neutral, so they d! on’t con tribute to climate change.

We aren’t just talking wind turbines and solar panels, though. People around the world are developing innovative and sometimes strange ways to decrease their dependence on oil and gas.

Wave Snakes 
use the natural up-and-down motion of waves to generate electricity.

Location: Portugal

The 460-foot long, British-made floating tubes represent the world’s first commercial-scale wave-power stations.

The snake-like power farms, which were first launched off the northern coast of Portugal in 2008 from the town of Aguçadoura, are an original concept in clean energy design.

Using the natural up-and-down motion of waves, the stations are able to convert enough electricity to power more than 1,000 homes.

The Wind Blimp is equipped with spinning blades to catch wind and generate energy.

Magenn Power Inc. developed its first wind blimp prototype in 2008. The MARS (Magenn Air Rotor System) is essentially an extremely lightweight wind turbine that is anchored to the ground by a tether. Helium is used to lift the blimp, which is equipped with spinning blades to catch wind, generating energy. The electricity is then transferred by the tether to either a power grid or batteries.

MARS has several advantages over other wind systems due to its size, weight, and the ability to operate in very light wind speeds. The blimp is transportable, easily deployed, and well-suited for off-site or rem! ote loca tions. The floating wind turbine also has the potential to produce electricity at under $.20 per kWh versus $.50 cents to $.99 cents per kWh for diesel.

Archimede is the first solar power plant to use molten salts as a heat transfer fluid to store energy from the sun.

Location: Syracuse, Sicily.

On July 14, 2010, Italian utility Enel unveiled “Archimede,” the world’s first solar power plant to use molten salts as a heat transfer fluid. The system contains 30,000 square meters (320,000 square feet) of parabolic mirrors that concentrate solar rays onto 5,400 meters of high heat-resistant pipes that carry the fluid molten salt. The fluid is then collected in special tanks and used to produce steam, which eventually contributes to electricity generation.

The salts — a mixture of sodium and potassium nitrate — are an extremely efficient heat transfer mechanism. Unlike synthetic oils used in traditional concentrating solar plants, molten salt can work at much higher temperatures (up to 550°C instead of 390°C). The salts store enough energy to keep the plant generating power at night or on cloudy days, which is a common limitation of many renewable energy sources.

See the rest of the story at Business Insider

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Wednesday, October 31st, 2012 news No Comments

Half Of India Plunged Into Darkness

Source: http://www.businessinsider.com/india-power-outage-day-2-2012-7

For the second day in a row, India has suffered a gigantic power outage.

This time it was bigger, as half the country has lost electricity.

Here’s a video from IBN explaining

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Tuesday, July 31st, 2012 news No Comments

More People Have Mobile Phones Than Electricity Or Drinking Water (AAPL, GOOG)

Source: http://www.businessinsider.com/chart-of-the-day-putting-global-mobile-in-context-2012-4

How big is mobile? Really big. This slide from analyst Chetan Sharma shows that mobile is the most pervasive technology ever invented.

As you can see, mobile has deeper penetration than electricity and safe drinking water.

chart of the day, putting global mobile in context, april 2012

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Monday, April 30th, 2012 news No Comments

Source: http://gizmodo.com/5882542/new-york-citys-energy-consumption-mapped-out-building+by+building

New York City's Energy Consumption Mapped Out, Building-by-BuildingConvinced you’re more environmentally aware than your neighbors? Now you can find out: scientists have mapped the entire energy use of New York City, building by building.

The interactive map, created by Bianca Howard, a PhD student in mechanical engineering at Columbia University, uses publicly available data to work out which buildings are using the most energy and how they are using it. Then, it displays the energy use on a color-map. Howard’s PhD supervisors, Professor Modi, explains:

“While discussions frequently focus on electricity use, homes in New York City, whether a townhouse or a large apartment building, use far more energy in form of heat rather than electricity. Nearly all of this heat is obtained from heating oil or natural gas. In addition, current electricity distribution infrastructure in many urban areas relies on large amounts of electricity brought in from outside the city, making it difficult to support increased future use without requiring significant investment of resources and funds. We are looking at ways we can address both these issues-reducing our heating bills and increasing local electricity generation capacity.”

The resulting interactive map is great fun to play around with, allowing you to see how energy use is split down between electricity, space heating and cooling, and water heating. The best bit is that, as mentioned, its detail lets you study energy use down to the scale of individual buildings. You can play around with the map here. Every city needs something like this. [Columbia Engineering via Boing Boing]

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Monday, February 6th, 2012 Uncategorized No Comments

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1024-bit RSA encryption cracked by carefully starving CPU of electricity

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Tuesday, March 23rd, 2010 digital No Comments

1024-bit RSA encryption cracked by carefully starving CPU of electricity

Source: http://www.engadget.com/2010/03/09/1024-bit-rsa-encryption-cracked-by-carefully-starving-cpu-of-ele/

Since 1977, RSA public-key encryption has protected privacy and verified authenticity when using computers, gadgets and web browsers around the globe, with only the most brutish of brute force efforts (and 1,500 years of processing time) felling its 768-bit variety earlier this year. Now, three eggheads (or Wolverines, as it were) at the University of Michigan claim they can break it simply by tweaking a device’s power supply. By fluctuating the voltage to the CPU such that it generated a single hardware error per clock cycle, they found that they could cause the server to flip single bits of the private key at a time, allowing them to slowly piece together the password. With a small cluster of 81 Pentium 4 chips and 104 hours of processing time, they were able to successfully hack 1024-bit encryption in OpenSSL on a SPARC-based system, without damaging the computer, leaving a single trace or ending human life as we know it. That’s why they’re presenting a paper at the Design, Automation and Test conference this week in Europe, and that’s why — until RSA hopefully fixes the flaw — you should keep a close eye on your server room’s power supply.

1024-bit RSA encryption cracked by carefully starving CPU of electricity originally appeared on Engadget on Tue, 09 Mar 2010 02:47:00 EST. Please see our terms for use of feeds.

Permalink p://www.theregister.co.uk/2010/03/04/severe_openssl_vulnerability/“>The Register, TechWorld  |  sourceUniversity of Michigan  | Email this | Comments

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Tuesday, March 9th, 2010 news 1 Comment

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