The Naked Scientists

The Naked Scientists Forum

Show Posts

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.


Topics - syhprum

Pages: [1] 2 3 ... 10
1
Technology / Voyager 1 thermal control
« on: 07/04/2014 12:24:19 »
I have been reading the New Scientist discussion as to whether or not Voyager 1 has left the Solar system and one point about its power consumption surprised me that was that most of its electrical power is taken up by heaters used to keep its instruments at an appropriate working temperature.
This seems a very strange system as the electrical power is derived from thermo electrical generators that are probably less than 10% efficient so there must be a great deal of waste heat available why was some of this not diverted for thermal control ?

2
The performance of the modern F1 car is much influenced by the ride height and tyre inflation pressure.
Next season tyre warming blankets are to be banned, tyres are normally inflated by dried air or Nitrogen the pressure of which increases as the temperature rises, is there any thing that can be added to reduce this tendency ?.

3
Geek Speak / popcorn time
« on: 20/03/2014 16:45:48 »
According to the media this easy to operate pirate download application is going to ruin the film industry , it is not easy enough for me I cannot make it do anything although I know many ways to download films for free if I was sufficiently lacking in morals to do so.
Simply as an academic exorcise can anyone make it work.
if you do not think it should be published contact me privately I assure I will not use it to make illegal downloads   

4
Geek Speak / The windows 8.1 spring update
« on: 12/03/2014 10:25:26 »
I am using the latest 8.1.1 update but as I use Start8 to make it look like Windows 7 I can't say I have noticed anything different.

5
Geek Speak / sfc system check and repair
« on: 06/03/2014 22:14:06 »
SFC scannow seem to be very good at finding system errors but not very good at correcting them even when run several times with an uncorrupted reference source, let us have your experiences in this matter. 

6
how quickly would it happen ?, would there be much radiation of photons and neutrinos before the event horizon trapped everything ?.

7
Many successes in decoding enigma coded communications were due to bad operating procedures what was the correct way to use the machines ?

8
Geek Speak / Removing camera shake
« on: 05/01/2014 16:27:40 »
Has anyone any experience with Photoshop/Piccure I have been trying to get some results from a badly shaken shot with little results.

9
When TV restarted in the UK in  the period between 1946 and 1952 a lot of people were prepared to watch 11cm high pictures  nominally of 377 lines but as few domestic receivers interlaced properly actually 183 lines.
I wondered what could have been done if modern data compression had been available.
I often watch 360 line broadcasts of F1 races on the internet with a data rate of 400Kb/s and a 9/16 format but would still find them watchable at 180 lines and the early 5/4 format.
My calculations show that a bandwidth of 9kHz would have sufficed for this and the whole country could have been covered by the two high power 200kHz stations.
Colour would have been considered miraculous!

10
Do they have internal pressure gauges and "Bluetooth" transmitters?

11
Geek Speak / How did Ransomware get on my machine?
« on: 02/12/2013 15:19:44 »
Recently after setting up a new 500Gb drive on my PC I ran "Exterminate It" and was surprised to find two instances of ransomware thrown up that had not been detected by my regular anti virus program (admittedly I had not done a full scan as I had only loaded what I thought to be clean software) .
These were not causing any loss of performance as far as I could see and were removed by "Exterminate It" with no recurrence, I believe they might have been part of some rogue bit coin mining scheme.   

12
Technology / Revolution in power generation
« on: 30/11/2013 12:18:48 »
An Italian company is starting to ship cold fusion power generators, at last we can get rid of polluting coal fired plants and stop wasting money on futile research into ITER and such like

http://phys.org/news/2013-11-italian-company-portable-cold-fusion.html#ajTabs

13
How fast could the worlds largest computer systems produce bitcoins and would it be profitable to rent time on one to produce them?

14
I find that this system it a little troublesome when it first starts up the text on the screen is rather small and one cannot open "display" to adjust it, if one closes down and restarts all is back to normal.
Different versions of Nvidia driver for the 8400GS card do not help nor does waiting till the internet connection is fully established.
This does not happen with windows 8.0 or windows 7
 

15
Physics, Astronomy & Cosmology / Relative rotation
« on: 23/10/2013 14:34:44 »
If I partially fill a bucket with water the and rotate it so that the water also rotates the water will climb up the sides of the bucket and become depressed in the centre.
why does this happen, there is no aether so what am I rotating it relative to, is it the local gravitational field of the Earth, the Solar system, the Galaxy, the whole universe or that of the sea of dark matter in which we are immersed.

16
I understand that to be safe from the really sophisticated code crackers one needs to generate a truly random password of say 20 alphanumeric characters.
could this be produced by shaking 17 dice 20 times and deducting 17 each time from the spot count.
would this be overkill or defenceless against thousands of GPU's

I calculate this would give 3.876*10^38 combinations but how truly random would it be ?

17
Geek Speak / sub titles on USB dongle stored movies
« on: 05/10/2013 15:12:26 »
After a struggle I have found a way into the service menu and switched on the USB movie playing function on my LG TV that was switched off for commercial reasons and the movies now play fine except for one thing.
I can not get the subtitles although they are there OK when I play the USB thru my PC  (with FLV)

18
In Sci-Fi novels of the early twentieth centaury space ships were often propelled by moveable gravity shields.
Assuming that gravity is mediated by Gravitons a particle thought to be much lighter than Neutrinos  this does not seem to be a very practical idea .
Test have been made to see if any gravitational screening effects are seen during a Solar eclipse but any tiny effects noticed were probably due to atmospheric cooling when the light was cut off.

19
I tried to get correspondents interested in the Sarin gas used in Syria but no one replied

20
SKYPE works quite well and is almost the defacto standard but there are other free systems that are supposed to be better

21
Chemistry / The source of the poison gas used in Syria
« on: 29/08/2013 19:21:24 »
Although establishing the source of the Sarin gas used in Syria would be too late to prevent an American air strike it would seem that with careful analysis of any recovered samples could determine whether it was the industrially produced form that would have been deployed by the government or an amateur form produced by the rebels.
There are several possibilities as to where it came from ,was it deployed by the government ,a rebel stock pile accidently released or deliberately released for political reasons.
Of course the rebels may well have access to the industrial version but it might be possible to determine which batch.   

22
Technology / The early warning radar system
« on: 28/08/2013 12:13:45 »
On a recent trip to the mainland I passed thru Dover and was saddened by the sight of the near derelict early warning radar antenna's.
This primitive 20 MHz radar system and its associated fighter control system  contributed as much as the much vaunted Bletchley park code breakers in avoiding us being occupied by the Germans in 1940.
It would be fitting if one station could be completely restored as a museum.

23
Geek Speak / How can we work out the angles ?
« on: 04/06/2013 13:24:00 »
This puzzle appears on Facebook adverts as part of a scam with the comment that 97% of the viewers cannot work out the angles a and c for the moment this includes me.
I am assuming the sides AB and AC are equal
I feel that simultaneous equations are needed or is there a more simple way ?

24
Geek Speak / Is it a Sine Cosine thing
« on: 02/06/2013 09:01:41 »
I am always surprised how much faster the length of daylight changes between the equinoxes in mid April dawn appears to come rapidly much earlier day but come the end of June things steady down.
From my long gone schooldays I seem to remember something about d/dt am I on the right track?.

25
I am somewhat shocked to see the Phys.org Newsletter Thursday, May 23 publishing an account of a faked demonstraition of the "Rossi E-Cat Device" as though it was a serious scientific event.
I have always considerd Phys.org a source of good scientific information but this rather changes my opinion.

Pages: [1] 2 3 ... 10
SMF 2.0 | SMF © 2011, Simple Machines