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galihadventure

Typical Vulcanian Eruption! A lot of lava boms thrown up from the crater!

Batalla épica con final inesperado

Researchers design a functioning artificial womb

Researchers have designed an artificial womb-like device that could drastically change the way we care for extremely premature babies. The device, which has been used successfully with lambs, mimics the environment of a real womb. It’s designed to allow critically preterm infants to continue developing as they normally would.

Via ResearchGate

Image credit: Children’s Hospital of Philadelphia

More in Nature: An extra-uterine system to physiologically support the extreme premature lamb

Here is a semester project in the 2012 Mechatronic control systems engineering module at San Jose State University. This is a Proportional-Integral-Derivative controlled (PID), 6 degree of freedom (6-DOF) Stewart platform, which basically means it has six axes on the top plate. This prototype uses 6 radio controlled servo motors instead of the traditional use of hydraulic jacks or electronic actuators. (this video has sound)

Proportional-Integral-Derivative:

A PID controller continuously calculates an error value as the difference between a measured process variable and a desired setpoint. The controller attempts to minimize the error over time by adjustment of a control variable, such as the position of a set of servo motors or actuators,  to a new value, given by a weighted sum:

where Kp ,Ki , and Kd, all non-negative, denote the coefficients for the proportional, integral, and derivative terms, respectively (sometimes denoted P, I, and D).

P accounts for present values of the error , and is determined by the direction and magnitude the correction needs to be applied (e.g. if the error is large and positive, the control variable will be large and negative),

I accounts for past values of the error (e.g. if the output is not sufficient to reduce the size of the error, the control variable will accumulate over time, causing the controller to apply a stronger action through P), and

D accounts for possible future values of the error, based on its current rate of change. This part determines when and at what rate it needs to reduce the magnitude of its action, e.g as the ball fast approaches the desired set point at the centre of the plate.

[source]

Pokemon Spectrum | by gogoatt

that is so sad alexa play ozar midrashim

Figurilla en Forma de Rana

La pequeña pieza elaborada en oro, con incrustaciones de turquesa a manera de ojos, procede de Chichén Itzá y seguramente poseía un especial simbolismo por el estrecho vinculo existente entre los anfibios, las deidades y el inframundo.

INAH

Transformers: Prime Wars Trilogy | S3:E4 Primal

With our heroes cornered, Predaking demands Victorion hand over the Enigma of Combination. Inside the mysterious dome, Megatron finds the Requiem Blaster, but is confronted by a mysterious figure guarding it.

New Episodes on Tumblr every Tuesday!

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Heather Nesheim  -  https://www.etsy.com/es/people/heddarsketch  -  https://twitter.com/heddarsketch

Gray wolves by Chad Barry