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Unhappy with the life of your smartphone battery? Thought so. Help could be on the way from one of the most common, yet poorly understood, forms of power generation: static electricity.
“Nearly everyone has zapped their finger on a doorknob or seen child’s hair stick to a balloon. To incorporate this energy into our electronics, we must better understand the driving forces behind it,” says James Chen, PhD, assistant professor in the Department of Mechanical and Aerospace Engineering in the School of Engineering and Applied Sciences at the University at Buffalo.
Chen is a co-author of a study in the December issue of the Journal of Electrostatics that suggests the cause of this hair-raising phenomenon is tiny structural changes that occur at the surface of materials when they come into contact with each other.
The finding could ultimately help technology companies create more sustainable and longer-lasting power sources for small electronic devices.
Supported by a $400,000 National Science Foundation grant, Chen and Zayd Leseman, PhD, associate professor of mechanical and nuclear engineering at Kansas State University, are conducting research on the triboelectric effect, a phenomenon wherein one material becomes electrically charged after it contacts a different material through friction.
The triboelectric effect has been known since ancient times, but the tools for understanding and applying it have only become available recently due to the advent of nanotechnology.
“The idea our study presents directly answers this ancient mystery, and it has the potential to unify the existing theory. The numerical results are consistent with the published experimental observations,” says Chen.
The research Chen and Leseman conduct is a mix of disciplines, including contact mechanics, solid mechanics, materials science, electrical engineering and manufacturing. With computer models and physical experiments, they are engineering triboelectric nanogenerators (TENGs), which are capable of controlling and harvesting static electricity.
“The friction between your fingers and your smartphone screen. The friction between your wrist and smartwatch. Even the friction between your shoe and the ground. These are great potential sources of energy that we can to tap into,” Chen says. “Ultimately, this research can increase our economic security and help society by reducing our need for conventional sources of power.”
As part of the grant, Chen has worked with UB undergraduate students, as well as high school students at the Health Sciences Charter School in Buffalo, to promote science, technology, engineering and math (STEM) education.
while I’m working on a tweed champ 5f1 replica with 10″ speaker, I recall they say the output transformers affect the tone.
and, I noticed I never saw the back side of champ chassis before. it’s where I start finding a vintage OT for my project
This update has done a couple of years ago. and, I noticed I haven’t updated the pictures. here they are
And, the leftover stock parts from BJ4 and B44
They tweaked the large sprague caps and the small ones too much for the scene. but it’s still good to see my favorite sprague capacitors on a movie. aren’t they orange back in the days?
this board is Apple-1 from this movie Jobs from 2013
btw, I wanted to capture the scenes. and it didn’t work with Safari browser. this helped me out. you can capture the screenshot while it’s playing on chrome. it didn’t work while posed.
You think that the universe resides outside of you and it is true that there is something out there all right. However, that something is nothing like your perception of things. Let’s take the materialist view. That is that everything is just “stuff”. Atoms, molecules, quarks and radishes and all kinds of other “stuff”. That stuff is a kind of vibratory energy through which other kinds of energy flow. Energy is likewise “stuff” just in a different form.
Your brain for all of its gooey gray grossness is a pretty complex thing. More complex than just about anything else in the universe. Stars and planetary systems are BIG but relatively simple. Now, within this gray matter are trillions perhaps a hundred trillion or more neurons. These are specialized cells. They are connected with neural pathways like a gigantic and complex net. When we observe we make pathways. When we think we make other pathways in exactly the same fashion except that the data comes from the brain, i.e. the pathways that are already present.
Now, everything you know, remember and experience has no existence for you aside from patterns in this network which began to form the instant your brain developed enough in the womb. So, all of your experiences are just patterns. If the patterns were changed, as in an accident then your reality changes. It is all just patterns connecting and relating to other patterns in this neural network. This is thought, cognition and self-awareness on a macro scale.
Yet, reality, objective reality is something else altogether. It has an extrinsic existence outside of this pattern of neural networks. Your knowledge of it is very limited. Just enough to get around, find food shelter and a mate. When you sleep something else happens. The network fires in patterns. Not random patterns. Very meaningful patterns but without the necessity of obeying the laws of time, space or physics.
Consciousness is so much more complex than even the greatest neuroscientists, medical researchers and philosophers can even begin to grasp and the waking mind is the least significant part of the picture.
while my 5F1 project is not loud enough with Jensen 10J11 speaker, I tried a few different 6v6 tubes for the last few days.
I noticed Ken-Rad 6v6GT/G tubes are louder than the other tubes. and the texture with this tube is acoustic and strong.
I don’t see the difference between RCA, GE, and Sylvania 6v6gt tubes that much. GE Canada 6v6GT is a bit brighter than 50’s stock tweed RCA and 60’s Sylvania but, Ken-Rad 6v6GT/G sounds way different to them