Archive for December, 2008

Young People Choose Cars Above Greener Transport Options

Monday, December 8th, 2008

This article was on the Science Daily website last week. It appears that extensive educating of children is necessary if mass transportation, smaller vehicles, and greener transport options are to be more popular in the future. It was written in England with information gathered there, but there’s no doubt that it applies worldwide.

Source: http://www.sciencedaily.com/releases/2008/12/081204074658.htm

Young People Choose Cars Above Greener Transport Options

ScienceDaily (Dec. 5, 2008) — Young people find the prospect of driving cars more attractive than other modes of travel that are kinder to the environment, according to research conducted by a researcher at the University of the West of England.

Dr Tilly Line has just completed a PhD entitled ‘The attitudes of young people towards transport in the context of climate change.’ Dr Line’s work examined how young people are influenced by knowledge about climate change when it comes to making choices about how they will travel when they become adults. The study concentrated on the views of young people aged between 11 and 18 years and the findings found an overwhelming desire by young people to drive.

Dr Line explains, “Specific attention was give to how climate change considerations affect these intentions. Overall it was found that the participants have a general understanding of the link between transport and climate change, but when it comes to their attitudes towards different modes, they place higher value on identity, self-image, and social recognition than the environment. It is this that explains their positive attitudes towards the car and driving in favour of alternative modes. For example, the participants pointed to learning to drive as “a mile-stone in teenage life” - something that everyone does at seventeen. They also pointed to the car as a symbol of social status and the importance of their role as a driver in their friendship groups.”

Comments from those who took part include:

  • “Limousines, they’re like a really special thing for like if you’re posh or you have lots of money. That’s why I want to have one of them.” (11 yr-old female participant)
  • “Me and my friends share lifts to school in the mornings. Now our friends, all of our group have actually passed, we take it in turns to drive places…we share everything.” (18 yr-old female participant)

Dr Line continues, “Although it is recognised that transport policy makers are likely to require an understanding of the degree to which these values and attitudes are universally held among young people, it is suggested that policy aimed at reducing the public’s reliance on the car and increasing their use of alternative modes, should recognise such values, particularly in relation to soft policy measures (including marketing activities) targeting the socio-psychological motivations for travel choice. For example, one answer may be to promote cycling as a signal of success and ‘being cool’, rather than promoting the environmental benefits of this behaviour.”

“The importance of climate change shouldn’t be forgotten however. It isn’t the case that young people dismiss this issue, but more that they feel powerless to make a difference. I found that the young people think of climate change as being something that will not be felt until far off in the future and that there is little that they can do as individuals.”

  • “There are little things you can do, but nothing that will change the world, because individually we’re only little people.” (11 yr-old female participant)
  • “I’d like to change it. But I know I wouldn’t be able to, just me. If I really tried I know that I would just be wasting my life trying to do one thing I knew I couldn’t change.” (11 yr-old female participant)
  • The participants also suggested that although they receive information about what climate change is, they lack information about what they can do to tackle it:
  • “You don’t really get told what to do. …Instead of just saying ‘we’re polluting the world’, tell us what we can do about it.” (11 yr-old male participant)

Dr Line concludes, “On a positive note, I found that a number of the young people welcomed the idea that hard policy ideas leading to enforced travel behaviour away from reliance on cars would lead to a change in behaviour. But that this would only be possible if walking, cycling and public transport was easily accessible and reliable. This was even the case amongst those participants already driving and it seemed to stem from the belief that such action would empower more people to attempt to tackle climate change through changes in their travel behaviour as everyone would have to behave in the same way.”

  • “I think some people may want to help the environment but they don’t do anything about it but then again if they were forced to then they’d have to. …I mean eventually it’s going to happen anyway. It’s going to come to a point in time where there’s going to be a ban on cars or something …there’s just going to be no feasible way they can have all the cars on the road.” (18 yr-old male participant)




Adapted from materials provided by University of the West of England.

Source: http://www.sciencedaily.com/releases/2008/12/081204074658.htm


Making waves work: the Searaser hydro-power system

Monday, December 1st, 2008

This item was on the Gizmag blog over the holiday. I am impressed with this concept. It seems to me to be a rather elegant idea to harness wave energy. It uses wave energy to pump seawater to a reservoir where it can be dumped back into the ocean through a turbine to produce electricity or hydraulic pressure or whatever other energy is needed. This offers the capability to “store” energy in the reservoir during low demand times and then releasing it during high demand times, much like the pumped storage projects at places like Bath County, Virginia or Niagara Falls, New York. The pump itself is a simple concept with a minimum of moving parts. (only a double acting piston and some check valves) I can visualize these devices being assembled completely on land and then towed to their permanent site, where the anchor at the bottom could be pumped full of concrete and the whole assembly would then float to an upright position.  Lightweight hoses could then connect each one (As I’m sure it would be more efficient to produce many small ones instead of one or so large ones.) through a manifold to a large pipe to a reservoir, preferably on land, I would assume.  Their would have to be some careful specification of materials, as salty sea water will corrode many common substances.  This looks like a good project a student could replicate on a small scale with help from our AFV Lab.

Source: http://www.gizmag.com/searaser-hydro-power-system/10458/

Making waves work: the Searaser hydro-power system

November 27, 2008 Like the VIVACE system recently covered on Gizmag, SEARASER is a new approach to utilizing hydro-power as a renewable energy source. The idea works on the conventional principle of using water pressure to drive turbines but achieves this in a unique way. It consists of a tethered wave energy converter which uses the rolling motion of waves to pump water to higher ground on-shore from where it can then be stored and used to create electricity on demand.

The brain-child of British inventor Alvin Smith, SEARASER uses a float attached to a double acting piston which is in turn fixed to a weight on the sea bed. As the float rises and falls on the ocean swell, the energy is used to pump water - no fossil fuels required.

The system is able to operate in rough weather, as little as 30 feet of water and has a self-adjusting mechanism which allows it to accommodate different tide levels by locking in to a suitable height. It requires no electrics, no dams (though a catchment pond or ponds would need to be constructed) and no ugly seaside structures with all machinery able to be located underground.

If no suitable on-shore location is available to store the water, SEARASER can produce enough pressure to drive turbine generators near sea level according to its inventor. The only drawback here is that the production of energy would then be at the mercy of the waves entirely. i.e. no waves equals no power.

The prototype has reportedly pumped water up a 160 foot hill though a pipe, but a full sized Searaser could potentially pump water up 650 feet and generate about 0.25 MW of power.

SEARASER via Treehugger via Times Online.

Images: dartmouthwaveenergy.com

Source: http://www.gizmag.com/searaser-hydro-power-system/10458/