This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Messages - syhprum
« on: 30/07/2015 19:55:01 »
I think we are putting too much blame on programmers surely many crashes are due to transient hardware glitches otherwise things would not run after the reboot if you attempted the same operation again.
Physics, Astronomy & Cosmology / Re: How is the electrical circuit completed between the powerstation and my home?« on: 30/07/2015 10:29:10 »
When servicing TV,s many years ago I found in one house the line voltage had dropped to about 130 volts and varying wildly which I diagnosed as a disconnection between the neutral connection of the local distribution transformer and the neutral line.
connecting the neutral line to ground at the house made a temporary fix so that I could check the TV
Physics, Astronomy & Cosmology / Re: How is the electrical circuit completed between the powerstation and my home?« on: 29/07/2015 22:44:03 »
When I first encountered it I found the USA system rather confusing they use a delta three phase system with one output winding centre tapped and grounded to supply either 117 or 234 volts for domestic use.
the result is if you check the voltage of the delta lines relative to ground you find two of 117v and one of about 160v which rather puzzled me !
I too thought such efficient mirrors were available but could not find a supplier, it would be interesting to set up an experimental system in one of the long tubes used for gravity wave research a possible IG noble project
Even with a 1mm hole and a 1m beam width the loss of energy would be trivial compared with the losses incurred by real world mirrors, it seem that the best available have a 0.1% loss at each reflection so making the box long is the best solution.
I assume your long light storage box would have slightly curved mirrors so that the light beam would stay on centre and not spread out.
Rather like the Spectra Physics lasers with which I used to work, your 12882 Km long device should have a quite high "Q" factor with only 23.28 reflections per second.
Assuming otherwise perfect mirrors the loss at each reflection the would be in proportion of the area of the hole compared to the beam width area
Physics, Astronomy & Cosmology / Re: How much energy is required to create absolute vacuum in one cubic meter?« on: 19/07/2015 11:36:25 »
It would be interesting to know how much power is expended per cubic meter to maintain the near perfect vacuum in the LHC
As far as I can ascertain the refrigeration system of the LHC consumes 170 KW to maintain 9000 cubic meters of vacuum which equate to about 19w/m^3 of course the initial pump down from atmospheric pressure would have required a considerable amount of energy.
We are up to version 10240 which it no longer lists as experimental so that should be the "final" one.
It can be downloaded from file sharing sources free of viruses (checked with three different AV software) and loaded preserving all your programs even if you are not a member, it is activated but I do not know for how long or whether it can be legally used for commercial purposes.
Windows 10 is rather perverse as regards video card settings my GS8400 cards require version NVIDIA 310 for the video processing programs to run in accelerated mode but windows 10 does not like this and as soon as an internet connection is available alters in back to 341 !
Physics, Astronomy & Cosmology / Re: Is it possible to monitor the outside of an aircraft, and detect if it will break beforehand?« on: 17/07/2015 17:35:44 »
I don't know to what extent it applies to aircraft but there is an old adage "if it ain't broke don't fix it"
Physics, Astronomy & Cosmology / Re: How much energy is required to create absolute vacuum in one cubic meter?« on: 16/07/2015 22:00:45 »
To condense every last particle of gas in a one cubic meter chamber a cold sink would have to be maintained for an indefinite time and or a getter fired as in CRT,s despite thermal leakage.
To remove EVERY particle would take an infinite time and energy.
If we take light as a general term for electromagnetic radiation we have the example of the resonant cavity used at radio frequencies, these are defined by there Q factors this being the ratio of stored energy verses that which dissipates.
Presumably one with a Q factor of 1000 would have the stored energy reduced to 1/e in one millisecond and pro rata.
Cavities where it is desired to store a great deal of energy such as in LHC are constructed of super conductive materiel.
I find the edge browser superior to IE11 but have difficulty starting it up, what I have to do is open some URL that naturally reverts to Edge (the default browser) and then with the favourites imported from IE11 get the URL I want.
I would be nice if I could open it from the taskbar as I di IE11.
The answer it is not high tech there is a built in facility called disk clean accessed from C drive/properties that does the job, all that is required is that the unwanted folder is correctly labelled and directly on the C drive
Both systems work well for getting rid of single files but seem to little use for getting rid of large blocks of unwanted data, after another system update I now have 30Gb of unwanted stuff !
As there is a fair amount of spare capacity the only problem it causes is if I run an anti virus program it wastes time checking thru these 30Gb of files but the only way out that I can visualise is to copy off everything but these 30Gb, format and copy back a rather long winded process.
« on: 09/07/2015 20:43:12 »
The best estimate I have seen is that the surface of the earth will cool to about 30°K much the same as the Kuiper belt objects maintained by radio active decay of the core.
The SETI people say that with Arecibo size antennas communication should be possible to 1000 LY,s
I am of course banished to this island for crimes to horrible to mention, the last time the anti sex crime inspectors visited they found that I was having sex with my pet sheep they decided that as punishment I could either be castrated or have my hard disk formatted I rather unwisely chose the later.
There is a lot of information on audio file data storage and conversion here
Although I have no modem I do have a phone and a audio tape recorder, my CPM computer is capable of downloading software from an audio file that presumably could be sent over the phone line and recorded on the audio tape recorder.
I have a tape of such an audio file recorded in 1969 I think from the ATS3 communication satellite but no reel to reel machine to play it on so this would substitute for a modem (we had to be clever to work with what was available in the sixties!) .
So write me some software on a CPM emulation (or genuine machine) encode it as an audio file and send it across on my phone line then I will sneak a 5" drive into my pc , boot it up and down load some suitable software off the internet then I will be back in business
« on: 07/07/2015 22:53:09 »
Top of the league must be anti Hydrogen a vast amount of money has been spent to produce a few atoms
© 2000–2013 The Naked Scientists®
The Naked Scientists® and Naked Science® are registered trademarks. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large.