Archived posting to the Leica Users Group, 2009/05/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On May 21, 2009, at 6:20 AM, Thein Onn Ming wrote: > The electrons liberated from the battery into the sensor > (simplified version) are probably just dissipated as heat through > the electrical components. Otherwise, you wouldn't need to worry > about charging a battery or amp noise... > > By the way, I'm new here. :) welcome Ming...and btw, this is one of the easier issues we tackle here, :-) Steve > > Cheers > Ming > > On May 21, 2009, at 8:49 PM, Vick Ko wrote: > >> Yes, these two answers, by Howard and Richard, are the two most >> "realistic". >> >> First, there is the mechanistic answer, that the pixels are merely >> the electro-magnetic storage states of the storage medium, and >> deletion alters their state. This alteration requires energy >> input, and you get into the operation and physics of the particular >> storage media. And that alteration might only be the elimination >> of the file definition (header) bytes, or might be the entire >> overwriting of the whole pixel array to a "start state". >> >> Then, there is the "information philosophy" side, which Howard >> talks about. Where did the information represented by that "state >> of the set of pixels, which might be an image", go? Is is now >> distributed into the minds and memories of all those who saw it? I >> personally don't understand the hypothesis that "information is >> never destroyed", but that is an indication of my lack of >> understanding. >> >> >> ...Vick >> >> Howard Ritter wrote: >>> Congratulations, Dr Ted! That is actually a very subtle and >>> incisive question. >>> The answer is rooted in quantum mechanics, information theory, and >>> the notion >>> that information, like matter and energy, is never destroyed. >>> There was a prolonged >>> and passionate debate in the physics community on this question. >>> It was feared >>> initially that when matter falls into a black hole, its >>> information content is lost, to >>> the great consternation of many physicists. It seemed as egregious >>> a violation of >>> fundamental physics as a violation of the conservation of energy. >>> But clever >>> insights and analysis finally saved the day. Check out The Black >>> Hole War by >>> Leonard Susskind, or at least James Trefil's Washington Post >>> review of the book at >>> Amazon: >>> >>> http://www.amazon.com/Black-Hole-War-Stephen-Mechanics/dp/0316016411/ref=sr_1_1?ie=UTF8&s=books&qid=1242872534&sr=8-1 >>> >>> So wherever the pixels go, in some fashion their information is >>> never lost to the >>> universe?no matter how good your memory scrubber is! The question >>> is, where >>> do the pixels go?oh, but that's what you asked, isn't it? >>> >>> That's my circular explanation. >>> >>> ?howard >>> >>> On May 20, 2009, at 9:57 PM, Richard Man wrote: >>> >>>> It goes to the bit bucket in the heaven! >>>> >>>> The pixels are stored as a file in the media, so it goes wherever >>>> files go >>>> when you delete a file. In practical terms, under Windows, >>>> normally the >>>> files go to the Recycling Bin so you can rescue them if needed >>>> unless you >>>> empty the Recycling Bin. When that happens, the disk space used >>>> by the file >>>> may be used by the system for the other files, but at the system >>>> level, the >>>> file is stored in multiple locations and it's possible to recover >>>> portion of >>>> the file even if the system reclaims and file and uses the >>>> storage space. >>>> >>>> There are methods to more permanently delete a file involving >>>> actively >>>> modifying all the data that the file. In the extreme case, one >>>> could destroy >>>> the drive by removing the platters and pound it into bits... >>>> >>>> Does this help? >>>> >>>> On Wed, May 20, 2009 at 6:42 PM, TED GRANT <tedgrant at shaw.ca> >>>> wrote: >>>> >>>>> I have just been asked a technical question and require an exact >>>>> answer if >>>>> possible. >>>>> "WHERE DO THE PIXELS GO WHEN YOU DELETE A PICTURE?" >>>>> Dr. ted >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >>> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > THEIN Onn Ming > *photohorologer ming at www.mingthein.com > www.flickr.com/mingthein > > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information