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Current Topic: ScienceSee Different Timeframes

MemeStreams combines the power of weblogs and social networking. The members of our community work together to find interesting content on the web. As you use the site, it learns your interests, and provides new links it thinks you will like. Read more about MemeStreams or create an account!

Harvard's baby brain research lab

At the world's leading baby brain research lab at Harvard University, Elizabeth Spelke's team is conducting experiments that reveal not only that humans are born with a range of innate skills, but that our prejudices are formed within the first few months of life.

Harvard's baby brain research lab


Where Are They?

Why I hope the search for extraterrestrial life finds nothing.

Where Are They?


Does Rail Transit Save Energy or Reduce Greenhouse Gas Emissions?

Far from protecting the environment, most rail transit lines use more energy per passenger mile, and many generate more greenhouse gases, than the average passenger automobile. Rail transit provides no guarantee that a city will save energy or meet greenhouse gas targets.

While most rail transit uses less energy than buses, rail transit does not operate in a vacuum: transit agencies supplement it with extensive feeder bus operations. Those feeder buses tend to have low ridership, so they have high energy costs and greenhouse gas emissions per passenger mile. The result is that, when new rail transit lines open, the transit systems as a whole can end up consuming more energy, per passenger mile, than they did before.

Even where rail transit operations save a little energy, the construction of rail transit lines consumes huge amounts of energy and emits large volumes of greenhouse gases. In most cases, many decades of energy savings would be needed to repay the energy cost of construction.

Rail transit attempts to improve the environment by changing people’s behavior so that they drive less. Such behavioral efforts have been far less successful than technical solutions to toxic air pollution and other environmental problems associated with automobiles.

Does Rail Transit Save Energy or Reduce Greenhouse Gas Emissions?


What You Need to Know About Energy

A 32-page primer from the National Academies.

What You Need to Know About Energy


AstroVision - Our Business

I've discussed the need for a space webcam before. These people seem to think there is a business in it.

By delivering the first live, continuous, true color image stream of Earth from space, AstroVision will revolutionize the delivery of weather, news, and environmental information.

We will capture and track catastrophic events such as hurricanes, volcanoes, forest fires, and a multitude of other continuous and unforeseen events—live.

AstroVision - Our Business


Climate change: A guide for the perplexed - earth - 16 May 2007 - New Scientist Environment

So for those who are not sure what to believe, here is our round-up of the 26 most common climate myths and misconceptions.

Climate change: A guide for the perplexed - earth - 16 May 2007 - New Scientist Environment


One sense at a time

Unlike adults, children don't integrate different types of sensory information.

One sense at a time


RE: Does Rail Transit Save Energy or Reduce Greenhouse Gas Emissions?

While most rail transit uses less energy than buses, rail transit does not operate in a vacuum: transit agencies supplement it with extensive feeder bus operations. Those feeder buses tend to have low ridership, so they have high energy costs and greenhouse gas emissions per passenger mile.

In other words, "Because no one rides public transit, we should not make efforts to improve the utility of said public transit."

People don't ride buses largely because they're often not complemented by a decent train system, or because it's too much of a pain in the ass due to shitty design (I'm looking at you MARTA). In the US, I've used the Chicago bus system to good effect, and in Fukuoka, Japan, we never even got on the train because their bus system is well designed and efficient (and inexpensive).

If you build it (correctly), they will come.

Even where rail transit operations save a little energy, the construction of rail transit lines consumes huge amounts of energy and emits large volumes of greenhouse gases. In most cases, many decades of energy savings would be needed to repay the energy cost of construction.

Whereas road building has none of those ill effects, I'm sure. Not to mention the often overlooked secondary effects of car culture, namely, sprawl, which begets deforestation, more construction of energy inefficient and likewise environmentally damaging home and strip mall construction.

Rail transit attempts to improve the environment by changing people's behavior so that they drive less. Such behavioral efforts have been far less successful than technical solutions to toxic air pollution and other environmental problems associated with automobiles.

Again, "People didn't seem to change their minds about driving when we put in this crappy bus line from one place to one other place, so why should we put in more?"

* Powering buses with hybrid-electric motors, biofuels, and—where it comes from nonfossil fuel sources—electricity;
* Concentrating bus service on heavily used routes and using smaller buses during offpeak periods and in areas with low demand for transit service;

Good ideas, and should be included in any new transit planning.

* Encouraging people to purchase more fuel-efficient cars. Getting 1 percent of commuters to switch to hybrid-electric cars will cost less and do more to save energy than getting 1 percent to switch to public transit.

Reasonable, but neglects secondary effects, and also probably not as easy as it sounds. Market effects have encouraged hybrid ownership, but far less than one would expect.

* Building new roads, using variable toll systems, and coordinating traffic signals to relieve the highway congestion that wastes nearly 3 billion gallons of fuel each year;

Of course, we need more roads. I'm ok with variable toll systems, though I think there are issues to be worked out. I'm very curious to see how Atlanta's highway on-ramp traffic light system will fare once it's operational. I've read nothing about it, but they've been installing the signals for months and months now. I'll reserve judgement until I know more.

If oil is truly scarce, rising prices will lead people to buy more fuel-efficient cars. But states and locales that want to save even more energy and reduce greenhouse gas emissions will find the above alternatives far superior to rail transit.

RE: Does Rail Transit Save Energy or Reduce Greenhouse Gas Emissions?


Lawrence Krauss and Natalie Jeremijenko | Seed Video

The Star Trek physicist enters the Seed Salon to discuss participation, the politics of knowledge production, and seduction with the artist/engineer.

Lawrence Krauss and Natalie Jeremijenko | Seed Video


We Need More Novels about Real Scientists

In novels and films, the most common scientist by far is the mad one. From H. G. Wells’s Dr. Mo­­reau to Ian Fleming’s Dr. No to Stanley Kubrick’s Dr. Strangelove, scientists are portrayed as evil geniuses unrestrained by ethics and usually bent on world domination. Over the past two years, as I struggled to write my own novel about physicists and their quest for the Theory of Everything, I often worried that I was falling prey to this stereotype myself. It is incredibly difficult to create fictional scientists who are neither insane villains nor cardboard heroes. To faithfully depict the life and work of a researcher, you need to immerse yourself in the details of his or her research, and very few writers have done this task well.

We Need More Novels about Real Scientists


 
 
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