Daily Archives: April 4, 2020

Archive of posts published in the specified Day


The Outdoor Elliptical Bike – BicycleDesk

The New Bike Concept: Run, Don’t Ride

Here’s a novel idea: Instead of riding a bike, why not run on your bike? Instead of sitting on your bike, why not use a stand-up version?

The outdoor-capable elliptical bike is a relatively new kind of exercise wonder that is like riding a bicycle, but in place of sitting and pedaling away to propel yourself into motion, you’re upright and use a soft running motion to move forward instead.

Think of it as a running bike, instead of the regular one your ride. It’s so much fun to use, you’ll hardly realize how much exercise you’re also getting.

And in this article, I’ll show you just how it helps you achieve all that, how it works, and why.

It’ll be among the most fun you’ll experience while breaking a sweat. But first, some perspective.

The “I Want to Exercise But It’s Too Tiring and Boring” Syndrome

While culture and people at large make you feel guilty for wanting to get gains for things you didn’t really work very hard for (like the seemingly conflicting notion of exercising without getting very tired– which seems to defeat the purpose– or getting rich while not working too hard), it’s also worth looking into better tools, techniques and methods that get you from point A to point Z in fewer steps than is normally done or known.

After all, that use of tools, intellect and technology are a constant competitive advantage that history and life have shown to advance progress, whatever your definition may be: to win a war, to get ahead, to get rich, or to stay healthy.

Now, we’re all for self-improvement, but while get-fit-quick schemes are a dime a dozen, most don’t work and are forever in the same moral dustbin as get-rich-quick scams.

But sometimes, the clouds part and the aliens descend and something comes along that actually works to your great surprise.

This is one of those times.

  ElliptiGO 3C ElliptiGO 8C ElliptiGO 11R ElliptiGO Arc
elliptigo 3c - comparison table elliptigo 8c - comparison table elliptigo 11r - comparison table elliptigo arc - comparison table
Check Price and Availability of the 3C Check Price and Availability of the 8C Check Price and Availability of the 11R Check Price and Availability of the Arc
Type Long stride Long stride Long stride Short stride
Gears 3-Speed Internal Hub 8-Speed Internal Hub 11-Speed Internal Hub 8-Speed Derailleur System
Indoor or Outdoor? Both Both Both Outdoor
Colors black, green black, green, red black black, green
Foldable Steering Columns? No No Yes No
Weight 42 lbs (19.1 kg) 44 lbs (20 kg) 39.4 lbs (17.9 kg) 37 lbs (16.8 kg)
Gear Range 177% 306% 409% 309%
Price Range 4.5/5 4.5/5 4/5 4.5/5
Our Rating star rating 4 out of 5 star rating 5 out of 5 star rating 5 out of 5 star rating 4 out of 5
Bottom Line The lowest priced of the long-stride range, the 3C has much less features than an avid outdoor elliptical biker may want when compared to other models in the line, especially having only 3 speeds/gears. But it gets the job done, does what you’d expect, and provides the benefits you want. Limited only by the finer features some may

Braitenberg Vehicles

Braitenberg Vehicles

[Vehicle image]


In the book Vehicles:
Experiments in Synthetic Psychology
, Valentino Braitenberg
describes a series of thought experiments in which “vehicles” with
simple internal structure behave in unexpectedly complex ways. He
describes simple control mechanisms that generate behaviors that, if
we did not already know the principles behind the vehicles’ operation,
we might call aggression, love, foresight and even optimism.
Braitenberg gives this as evidence for the “law of uphill analysis
and downhill invention,” meaning that it is much more difficult to
try to guess internal structure just from the observation of behavior
than it is to create the structure that gives the behavior.

I thought that was cool, so I wrote a vehicle simulator in Lisp.
You can have the source as soon as it doesn’t embarrass me.

Wednesday, December 9, 1998
I have a Java version that is nearly complete and is as powerful as
the original Lisp version (that is, it’s not just a Braitenberg
vehicle simulator, it is a Braitenberg vehicle simulation language).
It even reads the same world definition
because it is really a Lisp in Java (thanks to Michael
Travers’ Skij, a
Scheme interpreter implemented in and tightly integrated with Java).
You will see it here soon.

Here are a couple images from the Java work-in-progress:

[Java sim image]
[Java sim image]

The Simulator

The simulator allows one to create a world filled with vehicles and
lamps, set it in motion, and observe the resulting interactions.

The input to the simulator is a world definition file that specifies
the vehicles and lamps to be simulated and their characteristics.
Each vehicle and lamp is specified by describing its parts (e.g.,
sensors, radiators, motors) and their characteristics (e.g., sensitive
to infrared radiation, capable of maximum speed of 10 units/s), and
its brain. The brain is a network of “neurodes” that acts like a
clocked digital circuit. The brain usually drives components like
motors and radiators based on sensor input.

The simulator can produce output in the form of 2D graphics, 3D
or scene description files
for other dedicated renderers. Currently it uses Jim Firby’s portable
Common Graphics package for Lisp to do 2D, 3D is supported using
Apple’s QuickDraw
API, and the simulator can generate files for the POV-Ray raytracer.

[CG Renderer]
[QD3D Renderer]
[POV Renderer]

I typically view a simulation run in realtime using simple 2D or 3D
graphics and tweak it until I’m ready to generate POV files and spend
a few hours raytracing.

You can look at some examples of different
kinds of vehicles simulated in various worlds. There are 2D and 3D
animations of the simulator runs that demonstrate some basic vehicle
behaviors, like aggression towards light, non-linear
response to (“worship” of) light, pursuit by predators and
avoidance by prey, and (very) simple communication
between vehicles.

These are not the only possible behaviors; The range of behavior is
limited only by your ability to wire together networks of neurodes in
the vehicles’ little brains.

There is a heavily armed autonomous Combat Vehicles variant in which
vehicles can fire blasters


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