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Astro Biology

Facts About Origin Of Life On Earth - 0 views

www.astrobio.net/...sights-into-the-origin-of-life

origin of life on earth solar system planets nasa news

shared by Astro Biology on 06 Aug 14 - No Cached
  • Astro Biology on 06 Aug 14
     
    Get complete knowledge on how life began on earth, solar system news and recent space exploration. You can now read all information at one place at Astrobiology Magazine.
Astro Biology

Know How Origin of Earth's survived when Oxygen has Abundant - 0 views

www.astrobio.net/...life-know-now-date

earth atmosphere oxygen for life planet solar system news from nasa

shared by Astro Biology on 04 Nov 14 - No Cached
  • Astro Biology on 04 Nov 14
     
    We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?
  • Astro Biology on 04 Nov 14
     
    We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?
Astro Biology

DNA Humble Beginnings As Nutrient Carrier - 0 views

dna hummble nutrient carrier science astrobiology

shared by Astro Biology on 03 Sep 14 - No Cached
  • Astro Biology on 03 Sep 14
     
    New research intriguingly suggests that DNA, the genetic information carrier for humans and other complex life, might have had a rather humbler origin.
  • Astro Biology on 03 Sep 14
     
    New research intriguingly suggests that DNA, the genetic information carrier for humans and other complex life, might have had a rather humbler origin.
Astro Biology

How Massive Geographic Change may have Triggered Explosion of Animal Life - 0 views

www.astrobio.net/...riggered-explosion-animal-life

Cambrian explosion animal life earth atmosphere geological sciencce

shared by Astro Biology on 11 Nov 14 - No Cached
  • Astro Biology on 11 Nov 14
     
    Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.
  • Astro Biology on 11 Nov 14
     
    Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.
York Jong

Furby Resurrection - 0 views

members.cox.net/...furby.html

calebchung furby pic robot toy

shared by York Jong on 24 Mar 08 - Cached
  • York Jong on 24 Mar 08
     
    There are several websites documenting the original Furby circuit board. I decided to replace the original circuit entirely and replace it with a PIC based controller.
Astro Biology

Extreme Ultraviolet Image of a Significant Solar Flare - 0 views

www.astrobio.net/...e-of-a-significant-solar-flare

origin of life on earth nasa solar system planets in our news from

shared by Astro Biology on 21 Oct 14 - No Cached
  • Astro Biology on 21 Oct 14
     
    The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.
  • Astro Biology on 21 Oct 14
     
    The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.
York Jong

RoboLogo - Teaching Children how to program Interactive Robots - 0 views

web.mit.edu/...robologo.html

grammar javacc logo mit robot

shared by York Jong on 09 Sep 07 - Cached
  • All of the procedures take a discrete ``gear'' to specify the speed. The reasons for this are two-fold; first, by limiting the power of the truck, we simplify the interface to children. Secondly, it allows use to calibrate the ``gears'' so that, for example, 10 seconds forward in first gear is the same distance as 10 seconds backward in first gear.
  • The limitation of LOGO however is the lack of feedback from the environment. There is no way of expressing an event occuring in the outside world.
  • Simple constructs in iLogo extend the original LOGO language with interactivity capabilities of reading sensors and transfering control to different parts of the program.
  • ...6 more annotations...
  • These above rules handle all of the commands and expressions of the iLogo language except for the DoUnlessCommand. This command will execute a list of commands unless a boolean condition is met. If so, control is switched to a new list of commands for handling the exception condition.
  • Each stage of the compiler is designed using the Visitor pattern described in the book Design Pattern by Eric Gamma, et al. This pattern allows tree traversers to be created as seperated objects, instead of doing all traversals as methods of the nodes of the tree
  • We decided to use the JavaCC/JJTree tools created by Sun for generating a custom parser for our iLogo language written in Java.
  • The language must have primitives which allow the user of the language to write programs which easily transfer control based upon outside stimuli, in this case sensors on the truck.
  • An LM18293 push-pull motor driver connects the programmable counter array (PCA) of the 8051 to the truck's motors.
    • York Jong
      York Jong on 09 Sep 07
       
      LM18293 is a DC motor driver.
  • We took the Berkeley Logo language design as our base and then added a primitive for reading sensor and an exception-based control structure.
  • York Jong on 09 Sep 07
     
    RoboLogo is a system that enables children to program interactive robots. Children can program a robotic truck that interacts with the environment without having to deal with low-level implementation details.
York Jong

PHOTORESISTOR ALGORITHMS - 0 views

www.societyofrobots.com/rogramming_photoresistor.shtml

algorithm photoresistor photovore robot sensor

shared by York Jong on 14 Jun 07 - Cached
  • pseudocode: read left_photoresistor read right_photoresistor if left_photoresistor detects more light than right_photoresistor then turn robot left if right_photoresistor detects more light than left_photoresistor then turn robot right if right_photoresistor detects about the same as left_photoresistor then robot goes straight loop
  • Photovore Algorithm, Improved This algorithm does the same as the original, but instead of case-based it works under a more advanced Fuzzy Logic control algorithm. Your robot will no longer just have the three modes of turn left, turn right, and go forward. Instead will have commands like 'turn left by 10 degrees' or 'turn right really fast', and with no additional lines of code! pseudocode: read left_photoresistor read right_photoresistor left_motor = (left_photoresistor - right_photoresistor) * arbitrary_constant right_motor = (right_photoresistor - left_photoresistor) * arbitrary_constant loop
  • ...1 more annotation...
  • Photovore, Split Brain Approach This algorithm works without comparison of photoresistor values. Instead, just command the right motor based on light from the right sensor, and the left motor with only data from the left sensor. You can also get interesting variations by reversing the sensors for a cross-brain algorithm. pseudocode: read left_photoresistor read right_photoresistor move left_wheel_speed = left_photoresistor * arbitrary_constant move right_wheel_speed = right_photoresistor * arbitrary_constant loop
  • York Jong on 14 Jun 07
     
    The photovore is a robot that chases light, and is perhaps the simplest of all sensor algorithms. If you are a beginner, this should be your first algorithm.
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