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User: Jack+Quack

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  1. Re:Woohoo! on FDA Will Regulate Some Apps As Medical Devices · · Score: 1

    Here are two examples of how an app on it's own can pose significant risk to a patient, if the app is intended to make a diagnosis.

    1) a medical professional prescribes an intervention that is influenced by the app's diagnosis. If the diagnosis is inaccurate, the prescribed intervention may be very harmful to the patient.

    2) If the diagnosis leads to a treatment that is incorrect, the patient may be delayed from receiving the best treatment for that particular case, and this delay may be very harmful to the patient.

  2. Alarmist on Global Warming Irreversible, NOAA Scientist Finds · · Score: 1

    The alarmist soundbite "irreversible" is misleading. It is reversible by sequestering greenhouse gases allbeit expensive with current technology.

  3. Re:Duh. on Press Favored Obama Throughout Campaign · · Score: 1

    The point is still being missed here - the US media is largely the voice of the people. They have to be to maximize their profits. The people 'buy' their stories. The egg comes before the chicken, the bias was first with the people and the media merely reflected this.

  4. Re:The war has many issues on Discuss the US Presidential Election & the War · · Score: 1

    The unfortunate truth is that a large proportion of the American public do not forsee the problems of running from Iraq. And the nominees must appeal to this sector of the public. Obama had a very tough campaign against Clinton for the Democratic nomination and during that period a large percentage of the public were pushing for iminent troop withdrawls. If either had refused to pander to those requests they would have comitted political suicide.

    In my opinion Obama did not really believe that withdrawing within months of being elected was the right thing to do. But he did see that to do the right thing to do he first had to win the nomination. Using those smarts, I think it highly unlikely he would run from Iraq to the detriment of regional and global stability.

  5. Re:USB on What To Do With All of My Gadget Chargers? · · Score: 1

    Select and solder some heatsinked resistors over the 12v and 5v rails so that you are sinking an amp in each (switchmode PSUs need a constant load).

    Actually, switchmode PSUs do not require a constant load, they usually have the required preload inbuilt to keep the outputs in regulation. Wasting an amp at 12V in a resistor will constantly burn 12 Watts, and you will need a fairly substantial size of resistor to aviod flames.

    Next tap wires for different chargers, 12v and 5v are easy (as almost all are now) 3.3 and 12v will give you around 9v, 5v and 12v will give you 7.

    The trick of using the difference between voltage rails of a power supply may not work as expected, and could lead to catastrophic failure - be warned! For example, let's say you just want 1A at 7V, so you connect your load across the +12 and +5 terminals. The 1A will flow from the +12V, through the load and into the +5V. Therein lies the problem, the 5V rail will be sinking current instead of sourcing it, and it is likely that the voltage on the +5 output will rise much higher that 5V as a result, leading to failure or shutdown of the power supply. Only if the +5 output has a load itself, greater than the 1A required will this scenario be prevented.