Ocean Optics Web Book is a collaborative web-based book on optical oceanography. Joint Mathematics Meetings Hyatt Regency Atlanta and Marriott Atlanta Marquis, Atlanta, GA January 4-7, 2017 (Wednesday - Saturday) Meeting #1125.
Brilliant Staircase Design Stores Extra Energy to Make It Easier to Climb Later. Do you deliberately avoid visiting friends who live in multi- story buildings without an elevator? No one would fault you—having to climb even just a single flight of stairs is like being forced to workout against your will. But thanks to engineers at Georgia Tech and Emory University, stairs might one day do all the hard work for you. In a paper published today in the journal PLOS ONE, that team details their energy- recycling stairs, which store energy when you descend, and then release it to make the ascent easier on the way back up. You probably don’t stop to think about it while you race down a flight of stairs, but your body expends a considerable amount of energy in the process to prevent you from falling. It’s usually wasted energy, but these energy- recycling stairs take advantage of those forces using a spring- loaded mechanism that compresses each step and locks it down as you descend.
This leaves every step charged with potential energy once you’ve hit the bottom. When you go to climb back up, pressure sensors on each tread release the locking mechanism on the step below it, turning that stored potential energy into kinetic energy that helps lift a climber’s leg as the spring- powered step raises again.
As the stairs compress on your descent, the engineers have calculated they save around 2. And on the way back up, the energy- recycling stairs make it around 3.
The stair’s unique mechanisms can be retrofitted to existing steps, so the technology isn’t only for new buildings, necessarily. And installing them would be cheaper, and require less space, than an escalator or elevator. Ms Money 2017.
There’s no word on when this technology will be commercialized, but anyone living in an elevator- less building will certainly be hoping it’s as soon as possible.
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What Makes A Car Satisfying To Own? Well all know that automotive awards are bullshit, and the newest list to make the rounds is the Vehicle Satisfaction Awards. Some of the winners are predictable while other are surprising, but it does raise an interesting question, what car gave you the most satisfaction? Before we explore the more philosophical aspect of that thought exercise, let’s have a look at Auto Pacific’s list of most satisfying vehicles.
As I said above, you would expect a few of these winners to be on the list. A Ford F2. 50 is a good truck and doing truck things, the Chrysler Pacifica is a pretty swanky ride for a minivan, and it’s hard to argue that a Porsche 9. Now some of the other cars I find a little puzzling. The Nissan Versa? It’s not a bad car, but certainly not something that any of us would be satisfied to own.
However, if you have been cruising around in a ten- year- old beater for a while, a Versa will definitely feel like a step up. I’d be very curious to what the exact methodology is in determining vehicle satisfaction, and Auto Pacific doesn’t go into much detail on their press release except to say “Respondents rate 5. Here at Jalopnik we occupy a different space among car buyers, and while there are a decent number of us who buy new Camrys there is also a giant community of gearheads who purchase a whole range of interesting and perhaps even questionable vehicles, but get immense satisfaction of them and that will never be reflected in some industry white paper.
We share a connection with our cars that goes beyond sales stats and spec sheets. Some of us draw our satisfaction by buying something that needs some love and puts his or her time and effort in to bring it back to life.
While for others that satisfaction may come from simply owning something unique and different. Sometimes satisfaction can come from a regular car that has maintained its fun and loyalty over several years and many miles. I’ve been lucky enough to drive some truly incredible vehicles in the last few years; race cars.