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Yuji Naka
Works at Brain Container
Attends University of Rhode Island
Lives in RI, U.S
9,278 followers|1,866,944 views
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Yuji Naka

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Quite true.
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Pop Psychology is treacherous.  
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Where's he get a paper that still has classifieds?
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'Shape Memory Metal (Nitinol) engine is driven by hot water!'
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It's not continuous because the spark gap sparks freq. is not high. To make it continuous it has to be at least faster than human eyes can catch, my experience is at least above 15Hz. The tricky part is narrowing gap, the voltage is going down as well, in another word, this set-up will not give you continuous streamer.. You might want to try the AC output from the bug board transformer directly by cutting off the multiplier circuitry. 
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Really its a combination of the two. If primary side has small inductor and big cap. then secondary must have big inductor for small cap to work. You cant make a resonant transformer without the cap though. You simply get a step up transformer. Except in rare cases like the self tuning Slayer exciter.
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This is what it looks like inside of PS2 keyboard. The board has a chip that sends "finish a key" signal and multiplexing signal to PC I think. 
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I have trouble understanding this proximity alarm circuit that I got from +electronicNmore's video. What are these inverters for? Why three of them? Why one has a resistive feedback, but another one doesn't? 
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+Chris H. How did you recognize that U1-b is a part of bandpass filter? 
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Notice the button cell on the blade? Otherwise small USB fans can be easily modified.
 
(╭☞ ͡ ͡° ౪ ͡ ͡°)╭☞ I need one so bad
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+Yuji Naka yes im terrible lol
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I've Been Wearing These Every Night for Two Weeks.

A couple of weeks ago I started a little experiment with the light exposure my eyes received before going to bed. I can't remember exactly what the trigger was but I recall an article loosely about the effect of blue light before going to sleep and the impact that had on the quality of sleep and sleep hygiene in general. 

The theory is that the blue light emitted by artificial lighting before bed, such as from the screens of electronic devices including TVs, computers, and phones, stimulates the brain like early-morning light, triggering alertness and altering fundamental circadian rhythms. Over the last few years I have become hypervigilant about pursuing healthy sleep hygiene habits and quality uninterrupted sleep, because bad sleep results in a build-up of molecular waste products in the brain, poor / handicapped cognition, and a general brain phenotype that might best be described as prematurely aged (see: http://www.urmc.rochester.edu/news/story/index.cfm?id=3956).

I decided to invest in two pairs of glasses designed to block blue wavelengths of light:
1. Generic Uvex safety eyewear (pictured) http://www.amazon.com/gp/product/B000USRG90/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 and 
2. BluBlocker sunglasses http://www.amazon.com/gp/product/B00DE0MVD2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

The BluBlockers are obviously more stylish but they let in external light from the sides / periphery and so the generic - and much cheaper - glasses, which wrap around the head are better and provide better light blocking properties.

My experience has been very positive. In general I've been donning the glasses about an hour or two before bed and only take them off after the lights have been turned off. I'd say that 99% of the time at this time of day I am consuming information or media through a bright screen of one type or another, most often my home computer. Yes, image quality as regards colour saturation and richness suffers.

But I cannot remember falling asleep so quickly, nor sleeping so solidly - not that I'd classify my sleep beforehand as bad at all, just room for improvement. I feel fresher and more active in the morning and more alert during the day. A proper experiment will demand that I stop using the glasses for two weeks in order to compare the effects. The only drawback I've noticed, aside from the obvious loss of visual richness while wearing the glasses, is that my performance while trying to play first-person-shooters like Titanfall suffers considerably, which is interesting in and of itself. 

Finally, most importantly, and the reason for this post is that by coincidence I came across this article today http://today.uconn.edu/blog/2015/03/lighting-adjustments-necessary-for-better-health-researchers-say/ about the latest experiments and research that suggests adjustments to modern lighting are necessary for better sleep and health by restoring our bodies' natural circadian rhythms - essentially preventing blue light from suppressing our natural production of melatonin. 

Another option I wouldn't mind exploring in future is house-wide Philips Hue lighting automatically set up to not emit blue light after a certain time of night. And emitting extra blue light in the mornings of course. 

This is just my experience and if you suffer from poor sleep and, like me, are immersed in a screen of some sort most nights before bed, you might want to conduct this little experiment yourself. The glasses are only $10 after all. 

#sleep   #light   #circadianrhythm  
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+Yuji Naka Amber
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Thank you for making these videos. I really enjoyed it and can't wait for the third episode:) 
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In his circles
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  • Brain Container
    present
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
RI, U.S
Previously
Shanghai
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Engineer, Engineering, Electrical engineer, Scientist, Science, Chemistry, Biochem, Neuroscience, Robotics, electronics, electronics enthusiast, maker, DIYer, hobbyist, designer
Introduction
Electrical-Engineer-to-be, dedicated to science since 2011. I love brain-teasing mathematical puzzles, optical illusions, philosophical paradox, and drama conflicts questing the meaning of our lives as well as the fragility of our perception.  I'm more serious than funny, more passionate than sarcastic, and more cynical than gullible, but .. I like being casual and funny and enjoying this life as well.

Born in China, but not Made in China, I had strong repulsion against Communism and theocracy, or other forms of dictatorship/absolutism; for that reason, I don't recognize and claim myself Chinese although with somewhat cultural legacy, so related compliment and curiosity are not appreciated - asking me what I think about Chinese eating placenta and dissidents being prosecuted? I would easily see this as asking me why I did it. I have no obligation and filial feeling toward my birthplace.

Power or Piety, describes my religious view. I believe it's more of an utility and obligation to believe in being servants with sins rather than being desire-driven, undisciplined person with arrogance. In another word, it's a choice of moral reference. When the power, public or private, becomes untamed, it's better to believe in God than to believe in no God. The value of religions in the history and some area of the world can not be erased. It's the dark age and industrial revolution twined together that make our world progress. Now I choose a neutral stance after going through the extremes. I'm agnostic and having slight favor toward the belief of atheism. I'm holding the view that God represents metaphysical UNKNOWN. I don't follow any organized religion for religious purpose. I believe that Bible, Koran, and other religious scripts are like fairy tales, we should not interpret it as if it's the word by God. We get the good thing from them, and abandon the bad things from them, because I think they were all written by humans, who make mistakes just like us. 

Philosophy, the linguistic algebra of history; Science, the rules running the multiverse, are the path I came along and the end I reside in. Expanding my structure of knowledge and filling the matrix of analogies is my ultimate spiritual goal. 

My core value and belief is that via helping others I can have strength and sympathy not jealousy and complaint. Zooming out in the country level, I seek for two things as the core values - Democracy and Science; I'm an idealist. 

I studied different languages and linguistics, so I'm still going to try my best to be trilingual, but electronics is both my hobby and career. It's an on-going conflict probably in the rest of my life between the two lifestyles I wish for. I want to own the world through the languages, but I also like exploring the nature, the law of physics for inventing and making stuff. 

Bragging rights
I can cook and solder!
Education
  • University of Rhode Island
    Electrical Engineering, present
  • Shanghai International Studies University
    English Literature
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Male
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