Wireless Sensor Networks: Technology and Applications

Wireless sensor networks are destined to see widespread adoption in such diverse sectors as industrial process control, health care, and home automation. The promise and application domain of this field continues to grow, but several false-starts have limited deployments to date. Recent technological breakthroughs in reliability and power consumption have enabled new “industrial strength” networks to finally deliver on the promise of this exciting technology. Brutal standards battles between multi-billion-dollar companies attest to the commercial impact that the technology is now enjoying. This talk will cover some of the history of the field, along with the problems and their solutions, commercial applications, and research directions.


8. Recognizing Relatives

(April 16, 2010) Robert Sapolsky discusses various methods of innate recognition of relatives between animals and humans through protein signatures, olfactory cellular mechanisms, cognitive, and sensory processes. He explores the importance of relatedness in animal mating/ovulation cycles and other phenomena that show how organisms identify each other.

Stanford University

Stanford Department of Biology

Stanford University Channel on YouTube


Email Verification Link | Code Tutorial | Part 1

Code: http://tinyurl.com/p7oqlwv

Part 2: http://youtu.be/QsKuZKURKow
Part 3: http://youtu.be/LotpKXeGlnA
Part 4: http://youtu.be/pChdR6a-fbg


Follow at:
Facebook: fb.com/GraphoArtyYoutube
Instagram: @graphoarty
Twitter: @graphoarty


CS50 2016 – Week 2 – Arrays

00:00:00 – Week 1 in Review
00:04:33 – Debugging
00:05:05 – buggy0
00:09:12 – buggy1
00:12:49 – buggy2
00:18:11 – buggy3
00:22:19 – debug50
00:29:04 – Rubber-Duck Debugging
00:31:46 – Problem Sets Overview
00:35:18 – Academic Honesty
00:39:07 – Puppies
00:39:58 – Cryptography
00:41:00 – Ralphie
00:44:21 – Secret-Key Cryptography
00:46:18 – Strings
00:48:06 – string0
00:57:35 – string1
01:01:20 – Typecasting
01:02:39 – ascii0
01:06:19 – ascii1
01:09:04 – capitalize0
01:12:41 – capitalize2
01:13:47 – man
01:16:31 – strlen
01:17:40 – More on Strings
01:22:49 – More on strlen
01:25:09 – Command-Line Arguments
01:26:53 – argv0
01:34:22 – argv1
01:36:35 – argv2
01:42:26 – exit
01:46:36 – Arrays in Summary
01:49:28 – Outro


Amazing Science – What does an Electrical Engineer do?

What’s it really like to be an engineer or a scientist? What do they really do all day? You’re about to find out! Meet the next generation of engineers and scientists in these profiles of young professionals, who may just inspire you to join them. Yael Mcguire has so much fun at work, he doesn’t want to stop. Find out what it’s like to be an electrical engineer. 27 Oct 2011

Courtesy of the National Science Foundation


The Scientific Power of Thought

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The power of the mind and it’s ability to affect physical change may shock you! Find out how simply imagining can make it so.

Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz).

TWITTER: http://www.twitter.com/AsapSCIENCE
FACEBOOK: http://www.facebook.com/AsapSCIENCE

Mitchell Moffit

Gregory Brown

Further Reading —

1) The Brain That Changes Itself – Norman Doidge, M.D.

Music Experiment:
2) http://jn.physiology.org/content/74/3/1037.short
3) http://ti.me/WifVpK

Muscle Experiement:
4) http://jn.physiology.org/content/67/5/1114.short

Brain Plasticity:
5) http://bit.ly/S8CHlM


How Special Relativity Makes Magnets Work

MinutePhysics on permanent magnets: http://www.youtube.com/watch?v=hFAOXdXZ5TM
Subscribe to Veritasium: http://bit.ly/SuBVe
Support Veritasium- get a t-shirt: http://dft.ba/-vetshirt
Subscribe to MinutePhysics: http://bit.ly/1eVPynh

Magnetism seems like a pretty magical phenomenon. Rocks that attract or repel each other at a distance – that’s really cool – and electric current in a wire interacts in the same way. What’s even more amazing is how it works. We normally think of special relativity as having little bearing on our lives because everything happens at such low speeds that relativistic effects are negligible. But when you consider the large number of charges in a wire and the strength of the electric interaction, you can see that electromagnets function thanks to the special relativistic effect of length contraction. In a frame of reference moving with the charges, there is an electric field that creates a force on the charges. But in the lab frame, there is no electric field so it must be a magnetic field creating the force. Hence we see that a magnetic field is what an electric field becomes when an electrically charged object starts moving.

I was inspired to make this video by Prof. Eric Mazur http://mazur.harvard.edu/emdetails.php

Huge thank you to Ralph at the School of Physics, University of Sydney for helping us out with all this magnetic gear. Thanks also to geology for loaning the rocks.

This video was filmed in the studio at the University of New South Wales – thanks to all the staff there for their time and support.

Music: Firefly in a Fairytale, Nathaniel Schroeder, and Love Lost (Instrumental) by Temper Trap licensed from CueSongs.com


15. Human Sexual Behavior I

May 5, 2010) Robert Sapolsky explores behavioral patterns of human reproduction. He focuses on proximal and distal motivations, orgasm and fertility facilitation, non-reproductive sex, hormonal and cerebral sexual functions, and the differences and similarities between humans and animals in various physiological realms.

Stanford University:

Stanford Department of Biology:

Stanford University Channel on YouTube:


Lecture 08 – Bias-Variance Tradeoff

Bias-Variance Tradeoff – Breaking down the learning performance into competing quantities. The learning curves. Lecture 8 of 18 of Caltech’s Machine Learning Course – CS 156 by Professor Yaser Abu-Mostafa. View course materials in iTunes U Course App – https://itunes.apple.com/us/course/machine-learning/id515364596 and on the course website – http://work.caltech.edu/telecourse.html

Produced in association with Caltech Academic Media Technologies under the Attribution-NonCommercial-NoDerivs Creative Commons License (CC BY-NC-ND). To learn more about this license, http://creativecommons.org/licenses/by-nc-nd/3.0/

This lecture was recorded on April 26, 2012, in Hameetman Auditorium at Caltech, Pasadena, CA, USA.


The Poetry of Science: Richard Dawkins and Neil deGrasse Tyson

Support the Richard Dawkins Foundation for Reason and Science and get the DVD: http://bit.ly/hQGtIN

The Richard Dawkins Foundation for Reason and Science
( http://richarddawkins.net ) presents: “The Poetry of Science: Discussions of the Beauty of Science.”

Two of science’s luminaries converse on the beauty of science. Neil deGrasse Tyson, astrophysicist and host of NOVA and evolutionary biologist Richard Dawkins will explore the wonders of the Cosmos and of Life, its origins, its inspirations, and why science is not just an option, it is the only reality we possess.


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