If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #7267
Joined: Tue Oct 16 2012, 12:16AM
Location: Detroit, Michigan
Posts: 407
sixth sense technology.. this is absolutely amazing! Obviously not my idea.. but this type of technology could be much more if expanded on. Highly recommend watching this. "Ideas worth spreading" !
Registered Member #1749
Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497
I had an idea about using a gps receiver help control speeding because I have a GPS that states the speed limit if that is possible for a GPS to know the speed you can use it to electronically govern vehicle speed it however does not work every where but where it does work It could prevent a number of traffic accidents caused by drunks or punks.
Another idea is to make lcd windows that you could control with a POT on the dash basically adjustable tinting or using Photo sensors to adjust in sunny conditions but you get in to a crash and ruin your several hundred dollar windows you would not be happy.
Recreate the Wardenclyffe tower with todays technology and actually use it.
Come up with new Electrical components what I don't know Because I am talking things we do not have yet.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
My contributions for today. Spherical drone that charges up from ambient solar and wifi/3G energy, containing some clever software, sensor array and 64G of flash containing the "r*inb*w tables" for WPA2 to allow it to send back telemetry. Also has magnetic clamps so it can park on convenient lamp posts to charge up, and fully self contained counter-rotating blade disk stacks that can be varipitched to allow it to navigate with no external moving parts.
Making the topmost blades out of solar cells encased in resin would multipurpose them allowing a further weight reduction.
If more than one was in an area, they could exchange nav data so eventually they would all have a complete area map and locations of convenient "refueling points"
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
Normal webcams with not-too smart-sensors (without on-chip image compression etc.) might be able to run at a multiple of the framerate they're designed for. Maybe one can manipulate the control data to the image sensor so that the readout jumps back to the first pixel line after e.g. a sixteenth of the sensor is read. The resulting picture would look like a vertical stack of ROIs.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
Just read this acticle about acoustic cloaking:
So if reflections are pretty much what they should look like with the cloak in action, how about the behaviour over different frequencies? One could also imagine an insanely complex contraption where toroid vortex structures are produced that propagate through the water. Any surface could then be probed by obtaining faint doppler shifted scattering / primary reflection. (yes, try to get doppler information from propagating vortices^^)
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
hboy007 wrote ...
Christmas ... time to try and change the world for the better
I don't know if anyone has come up with this (and it would kinda spoil the fun to go looking for it): Assuming that man is a creature of habit, a "directional coupler" for highway exits could be created by having drivers keep right. The wrong-way driver is presented with a junction and maybe some direction signs.
Add some spikes and water-filled barrels and you can start your personal collection of wrong-way drivers.
I'd really like to see that structure implemented :D Of course this also works for countries where you drive on the left side.. just mirror the design then
in the US, we already have this system. but currently it uses napalm and high explosives.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
I was recently pondering the idea to use cosmic rays to do tomography without and extra radiation source. The LHC experiments do cosmic ray runs to register detector modules onto each other so at least transmission images should be possible. I discarded the idea due to insanely long acquisition times.
These guys however haven't, and they intend to use muons:
and they're actually measuring the path deviation of muons (the heavy, decaying cousin of the electron)
Muons as known for their long range and good penetration owed to their small e/m (unity charge over a large mass) ratio and relatively long half life (~2.2µs in the body-fixed frame of reference - yes, travelling at speeds near c allows them to appear longer-lived from an outside observer's position).
For an extra dose of delicious muon science, check out the Compact Muon Solenoid (CMS) experiment at the LHC:
where it takes tons of steel and powerful magnets to bend muon paths. Note that, as the CMS logo already suggests, muons cannot be contained within the calorimeter structures so they are "just" tracked and their energy is derived from the particle paths.
But where do the muons come from? Look at this simulated electromagnetic air shower caused by a high energy cosmic particle:
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Had an interesting idea today, what if the behaviour of Type 2 superconductors can be simulated by assigning each atom in the lattice a cross sectional area equivalent to its mass, then arranging them in order of cross section like a funnel.
As the temperature decreases reduce the cross section until the end of the funnel "closes off", this would represent the critical temperature. A sudden change in the angle between the sections would represent a discontinuity which would suggest an unstable material with interesting properties that could be redoped.
This might allow known formulae ie Y123 to be tried with heavier elements with the same effective change in angle, might allow a higher Tc material to be designed.
An alternate approach would be to assign the atoms frequencies corresponding to their mass, and then simulate the resulting major resonances to see if that relates to Tc or other measured properties.
Also had a thought about light induced superconductivity.
Maybe RF would do the same thing, a simple test would be to take a non superconducting perovskite and expose it to swept RF at low temperatures to see if there is a resistance drop at a specific frequency.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
I was traveling by train the other day and while reading an article about the reversal of the Earth's magnetic field possibly happening within a century I wondered:
why hasn't anyone built a solar / thermal powered magnetic field logger that stores the momentary magnetic field onto a ferromagnetic medium?
Surely it won't be hard to get the basic principles right (e.g. some simple burning glass optics to harness sunlight to heat ferromagnetic particles above the Curie temperature combined with a means to transport the recording medium) but like the Oxford Electric Bell, the Pitch Drop Experiment and The 10,000 Year Clock the beauty would be in the system design and engineering details. Then we could build a mesh of magnetic field loggers that will take data for many generations to come, all over the world and for the future of science no matter what human or natural events will keep us from doing it ourselves.
This basically is paleomagnetic recording in high fidelity! The field reversal will be quite dynamic and we won't get to see another one in roughly 800.000 years. Quite a rare event indeed!
Anyone please suggest something that keeps me from pursuing this idea
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
The ideas thread
