Pridi: Are you mixing apples with citrus fruits?
Pure elastic collision are pre-suppose mass particles. Electrical particles in this context do what? Cheers Jerry On Jul 18, 2014, at 3:21 AM, Pridi Siregar wrote: > Dear John and all, > > The limiting case of the particle collision (pure elastic collision) can be > represented by a dirac impulse whose spectral content ranges over all the > frequencies. I have a question: What does it mean to have a physical event > with an infinite bandwith while its information content is finite ? > > Best > > > Pridi > > > > > ----- Mail original ----- > De: "John Collier" <colli...@ukzn.ac.za> > À: fis@listas.unizar.es, "Pedro C. Marijuan" <pcmarijuan.i...@aragon.es> > Envoyé: Mardi 15 Juillet 2014 07:19:50 > Objet: Re: [Fis] FIS in Varna. Analogue Computation > > Dear fis members, > > I don't think that granularity per se is a > necessary basis for the application of > information theory to analog channels. In some > cases it might be, and I agree that studying the > relations between analog (continuous) and digital > (discrete) processes is likely to be both > interesting and productive. However the bandwidth > of an analog channel typically can be defined > even if there is no discreteness, for example if > the information bearing process consists of waves > so that the information bearing capacity is > limited by the wavelength. Virtually all physical > processes are cyclical in some way and thus have > a limited bandwidth. A countercase would be a > collision between particles that carries momentum > from one to another. I can't think offhand right > now (I just woke up), but I suspect that even in > such cases there is a finite amount of > information transferred. In any case, Shannon > discussed the bandwidth of continuous process channels. It is worth looking > at. > > John > > At 10:28 PM 2014-07-14, Srinandan Dasmahapatra wrote: >> I think I agree with Joseph Brenner >> here. Analogue computing is linked to real >> processes, while living beings find ways of >> transducing information out of dynamical states. >> The graininess that information theories rely on >> to define measures may be directly linked >> to physical limits in the information carriers >> (such as photons) or they might be limitations >> of the processing organism, extracting the >> sufficient "difference that makes a difference". >> And yes, there's often a too hasty rush to view >> analogue computing through pixellated perspectives. >> >> I'm not sure if this is well known to members of >> this list, but Bill Bialek's biophysics text is >> a profound reflection of the interplay between >> the analogue and the digital, with selection >> pressure forcing the sufficiency of the grainy >> "difference that makes a difference" towards a >> necessity for organisms, and hence pushing >> sensory systems close to the physical limits of information transfer. >> Cheers, >> Sri >> >> >> -------- Original message -------- >> From: Joseph Brenner >> Date:14/07/2014 18:12 (GMT+00:00) >> To: Pridi Siregar ,"Pedro C. Marijuan" >> Cc: fis@listas.unizar.es >> Subject: Re: [Fis] FIS in Varna. Analogue Computation >> >> Dear Colleagues, >> >> My first reaction to this suggested project is that the logic and philosophy >> of information (where I am more comfortable) would have little to >> contribute. However, analogue computation is an area in which insights from >> some complex theories of information might be useful. Analogue computation >> has always appeared to me, perhaps incorrectly, as being closer to real >> processes and therefore in principle better able to model their fuzzy, >> qualitative aspects. But in some of the articles I've seen, the authors seem >> almost apologetic at not being able to claim the 'power' of the digital >> computer . . . >> >> Best wishes, >> >> Joseph >> >> >> ----- Original Message ----- >> From: "Pridi Siregar" <pridi.sire...@ibiocomputing.com> >> To: "Pedro C. Marijuan" <pcmarijuan.i...@aragon.es> >> Cc: <fis@listas.unizar.es> >> Sent: Monday, July 14, 2014 4:35 PM >> Subject: Re: [Fis] FIS in Varna >> >> >>> Thanks for the news Pedro. Sounds really exciting! As you might recall I'm >>> interested in applications and I would be very keen on having a >>> brainstorming session that would include pure researchers and >>> application-oriented guys like me to explore technology transfer >>> opportunities. I don't know if this could be part of some (possible) >>> future agenda but I'm sure that business people may find it more than >>> worthwile to attend such meetings! I'm sure Plamen would be interested >>> too. >>> >>> best! >>> >>> Pridi >>> >>> >>> >>> ----- Mail original ----- >>> De: "Pedro C. Marijuan" <pcmarijuan.i...@aragon.es> >>> À: fis@listas.unizar.es >>> Envoyé: Vendredi 11 Juillet 2014 14:41:42 >>> Objet: [Fis] FIS in Varna >>> >>> Dear FISers, >>> >>> The fis summer conference in Varna just took place 5-6 July --our 20 >>> years of activities were celebrated too, FIS 20th. Rather unfortunately >>> not many people attended: half dozen from Spain related to Juan >>> Castellanos and me (from Madrid and Zaragoza); and a few parties around >>> Krassimir from Bulgaria and Ukraine. But we had a great time >>> (discussions and exchanges, banquets, beach) and the place is really >>> beautifull & prices quite affordable. The idea, quite possible to >>> realize, is that every year that we do not have a plenary fis or isis >>> conference, we arrange a small summer school in Varna. >>> >>> Among the exchanges this year, the retinue of "basic concepts" around >>> information generated the most intense debate--is there any concept >>> prior to information? Joseph's contribution was also discussed by >>> Krassimir addressed to the Russian colleagues (in Russian). Computer >>> related ontologies, new schemes to handle Big Data, and brain >>> exploration through AI and EEG by a very advanced Egyptian team were >>> quite exciting discussion topics too. For the future, we think that >>> spinoff companies could be enticed to participate, developing new >>> products and taking profit from some of those initiatives. In any case, >>> the interaction with brilliant ITHEA colleagues from Bulgaria, Russia, >>> Ukraine, Armenia, Belarus, Egypt... is a valuable experience itself. >>> >>> And that's all! >>> >>> best wishes---Pedro >>> >>> -- >>> ------------------------------------------------- >>> Pedro C. Marijuán >>> Grupo de Bioinformación / Bioinformation Group >>> Instituto Aragonés de Ciencias de la Salud >>> Centro de Investigación Biomédica de Aragón (CIBA) >>> Avda. San Juan Bosco, 13, planta X >>> 50009 Zaragoza, Spain >>> Tfno. +34 976 71 3526 (& 6818) >>> pcmarijuan.i...@aragon.es >>> http://sites.google.com/site/pedrocmarijuan/ >>> ------------------------------------------------- >>> >>> _______________________________________________ >>> Fis mailing list >>> Fis@listas.unizar.es >>> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis >>> >>> _______________________________________________ >>> Fis mailing list >>> Fis@listas.unizar.es >>> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis >>> >> >> _______________________________________________ >> Fis mailing list >> Fis@listas.unizar.es >> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis > > > ---------- > Professor John Collier colli...@ukzn.ac.za > Philosophy and Ethics, University of KwaZulu-Natal, Durban 4041 South Africa > T: +27 (31) 260 3248 / 260 2292 F: +27 (31) 260 3031 > Http://web.ncf.ca/collier > > > _______________________________________________ > Fis mailing list > Fis@listas.unizar.es > http://listas.unizar.es/cgi-bin/mailman/listinfo/fis > > _______________________________________________ > Fis mailing list > Fis@listas.unizar.es > http://listas.unizar.es/cgi-bin/mailman/listinfo/fis _______________________________________________ Fis mailing list Fis@listas.unizar.es http://listas.unizar.es/cgi-bin/mailman/listinfo/fis
