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5923 discussions

by Istvan Czigler

Czigler Istvan eloadasa (Kognitiv folyamatok idos korban...) technikai okok miatt egy hettel kesobb lesz, tehat majus 24-en (14 h, MTA pszichologiai Intezet, terez krt. 13, eloado terem).

32 years

by likomlosi＠ludens.elte.hu

32 years

Uj_preprintek: eliras

by szepes＠inf.u-szeged.hu

Elnezest kerek mindenkitol, elirtam a koglist ftp cimet. A pontos cim: ftp.cogpsyphy.hu Szepesvari Csaba szepes(a)csilla.inf.jate.u-szeged.hu

32 years

KOGLIST: re: Consciousness conference - if interested in cog. anthr., etc.//tovabbitot anyag

by benke＠sfu.ca

>Date: Fri, 6 May 1994 19:52:52 EST >Reply-To: JOBRIEN(a)UCS.INDIANA.EDU >Sender: General Anthropology Bulletin Board <ANTHRO-L(a)UBVM.CC.BUFFALO.EDU> >From: "John O'Brien" <JOBRIEN(a)UCS.INDIANA.EDU> >Subject: Consciousness conference - if interested in cog. anthr., etc. >To: Multiple recipients of list ANTHRO-L <ANTHRO-L(a)UBVM.CC.BUFFALO.EDU> > >From: PO1::"aki%EGO.PSYCH.MCGILL.CA(a)UICVM.UIC.EDU" "Zografos 'Aki' Caramanos" > 6-MAY-1994 17:49:28.13 >To: Multiple recipients of list BRAIN-L <BRAIN-L(a)MCGILL1.BITNET> >CC: >Subj: Toward a Scientific Basis for Consciousness (fwd) > >---------- Forwarded message ---------- >Date: Fri, 22 Apr 1994 15:32:48 +1000 >From: Kevin Korb <korb(a)bruce.cs.monash.edu.au> >To: Multiple recipients of list PSYCHE-D <PSYCHE-D%NKI.BITNET(a)uga.cc.uga.edu> >Subject: Toward a Scientific Basis for Consciousness > >>From: spotter(a)druggist.gg.caltech.edu (Steve Potter) > >Last week (April 12-17, 1994) I attended the following conference in >Tucson, AZ: > >TOWARD A SCIENTIFIC BASIS FOR CONSCIOUSNESS > >Here I will present a short review of this exciting meeting, along with >some opinions on some of the ideas presented. > >The overall mood at the conference, about 300 attending, was unusually >enthusiastic, due to the fact that this was really the first conference of >its type, bringing together researchers from many fields to talk about what >has been for the major part of this century a taboo subject in scientific >circles. Recent advances in a number of neuroscience methods have made >possible the objective, independently verifiable observation of a number of >phenomena associated with conscious thought. Furthermore, new modeling >paradigms associated with distributed processing in neural networks, chaos, >and emergent phenomena have resulted in simulations displaying many of the >qualities of conscious entities. These forces, and the fact that >consciousness is something we all (hopefully!) have and care about, brought >us together and will most likely result in the expansion of this and >related conferences in the years to come. > >Attending were researchers from very diverse fields, including biological >neuroscientists, computational neuroscientists, philosophers, >anesthesiologists, physicists, mathematicians, psychologists, >neurosurgeons, 'chaoticians' (a la Malcolm, in Jurassic Park), cognitive >scientists, and a fairly large contingent of 'researchers' of the >paranormal (ESP, shamanistic rituals, meditation). I was a little >disappointed that the organizers did not weed out a few of the more flaky >posters and talks, but the diversity was fun. The majority of the posters >and all but a couple of the talks were in the non-flaky category, i.e., >relating to testable hypotheses and the scientific method currently >accepted in the academic world. > >There were no parallel sessions, and the auditorium (at the U. of A. >Medical Center) was packed, making coffee breaks in the small lobby fairly >claustrophobic. A table was set up for anyone to display a book or paper >they were pushing, for people to look at. I learned about a number of >exciting books that I must go out and get ASAP this way, and think this >ought to be done at more conferences. > >Abstracts for all of the talks and posters were provided along with the >program, in a nice binder. It was announced that the complete papers will >be published in a book, but I will not hold my breath, as the presenters >are not even required to submit them for a month or so. A fairly complete >list of those attending was also provided by the end of the conference. >There were a number of field trips arranged that were too pricey for my >taste. I brought my bike and arranged my own field trips for free. > >For official info about the conference or proceedings, dont ask me, ask the >organizers: > >Alfred Kaszniak kaszniak(a)ccit.arizona.edu >Stuart Hameroff srh(a)ccit.arizona.edu >Jim Laukes jlaukes(a)ccit.arizona.edu > >Okay, here are some observations and opinions about the talks (and >posters). >A lot of folks gave whole talks on or at least paid lip service to the >notion of quantum mechanics having something fundamental to do with >consciousness. David Chalmers, in his excellent wrap-up put my opinion of >this issue cleverly: "Consciousness is mysterious. Quantum mechanics is >mysterious. By the 'Law of Minimization of Mystery', if you find two >mysteries, maybe they are the same." I feel like QM may be a useful >metaphor for some aspects of consciousness, but we know _way_ too little >about either to apply QM literally as a basis for consciousness. Let's be >careful not to mix up our metaphors and theories. > >Relating to this issue was something I had not heard about before >(surprising, considering I was a brain biochemist as a grad student) and >was quite interesting, was the possibility that microtubules could be >computational or information-transmitting elements. Microtubules (MTs) are >the major cytoskeletal elements of neurons, and basically all cells. >Several talks (somewhat redundantly) described how tubulin, the monomer >protein of which MTs are made, can switch between its two conformational >states based on the conformational state of neighboring monomers. Anyone >who knows jack about cellular autonoma will recognize certain similarities >here, and they actually did simulations to show waves of conformational >change propagating along the MTs. (Or along organized clusters of water >molecules next to or inside the MTs.) As far as I could tell, this was all >rampant speculation, yet to be borne out by experimental studies on real >MTs, but had a number of testable predictions. Hameroff mentioned that the >lowly single-celled paramecium has quite a complex repertoire of behavior >(not quite on the level with human consciousness, I would argue!) and yet >no nervous system. He proposes that its complex web of MTs may be its >'nervous system'. > >Being fairly well-read in the neural nets literature, I am struck by how >much has been accomplished with models using fairly simplistic 'neurons', >and certainly nothing as sophisticated as _sub_cellular nervous systems >within them. This leads me to believe that, whether MT processors exist or >not, we dont need to invoke such theories to explain consciousness. I must >not slight the boatloads of research that has shown that rearrangement of >MTs and other cytoskeletal elements is important in learning and memory, >but changing the cell's shape is a different issue than what these folks >were proposing. > >Just about every single speaker had a quote from or mentioned the work of >William James, who seems to have figured all this out around the turn of >the century. I am _not_ well read in psychology, but am inspired to track >down his writings, considering how progressive many of his ideas on >consciousness were. For instance, he was well aware of the associational >nature of all concepts, i.e., nothing has any meaning except in relation to >other things. I enjoy taking this concept all the way down to the neural >level, where the associations are between activated ensembles and such. > >I was very pleased to learn of the substantial work of Eric Harth on the >importance of feedback connections in the brain in perception. These >massive tracts, sometimes bigger than the feed-forward ones, are far too >often ignored by neuroscientists, leading them to believe that the brain is >stimulus-driven. Well, of course it is, but I feel (and Harth backed my >feelings) that most of what we see, feel, hear, etc. emanates from our >brain, the environment merely getting the thoughts started. > >One of my heroes, Walter Freeman, described how a stimulus makes the brain >(the smell-centers, specifically) go from a chaotic state to a state of >aperiodic oscillation, a basin of attraction probably corresponding to the >conscious feeling of recognizing the odor. I bet the feedback connections >play a major role in sending the system into its basins. (Perhaps he has >knows this already, I am not sure.) > >I was disappointed that several other prominent Thinkers on Thinking did >not attend the conference--were they invited? Notably, Douglas Hofstadter, >Daniel Dennett, John Searle, Ray Jackendoff, Stephen LaBerge, the >Churchlands, Robert Ornstein, Francis Crick, Geoffrey Edelman, Martha >Farah, and Marvin Minsky, come to my mind. Perhaps next year! > >The conference was mostly synthesis, proposals and speculations, so no >great answers about how consciousness happens yet. The best real data >presented, IMHO, was from Bruce McNaughton, who records from up to 150 >neurons at a time in the hippocampus of a freely behaving rat for weeks at >a time. Beside the fact that this is an extremely impressive technical >feat (I know because I am trying to do very similar things with cultured >neurons, that dont run around all night), it was a real window into the >thought processes (consciousness?) of a rat. He recorded the neurons' >activity while the rat was foraging around a box, and during naps before >and after the foraging. He found 'place cells' that fire only when the rat >is in a specific part of the box. He was able to use the place cell 'map' >to accurately predict the rat's trajectory, based on the neural signals. >He also showed the effect of subsequent learning on previously established >maps. But even cooler was the observation that neurons that had correlated >firing during the foraging and not before (implying that they are learning >preferences to nearby places), also were highly correlated during the >post-forage nap. Thus, the rat may have been dreaming of snippets of its >box experience, reinforcing or consolidating the important associations. >Neat stuff. > >I look toward functional MRI to come up with similar experiments on humans >in the near future. Keep your eye on this amazing new technology: I >predict that it will oust PET studies in a year or two, due to its far >greater spatial and temporal resolution, and the fact that it does not >require the poor subject to dose up on radioactivity. > > >An excellent conference overall, with many speakers referring to other's >talks in their talks. >Subscribe to Psyche-D if you are into this type of thing and want to chat >with like minded individuals who obviously have way more free time than I >do. > > > >Steve Potter, Ph.D. >Division of Biology 156-29 >California Institute of Technology >Pasadena, CA 91125 >spotter(a)druggist.gg.caltech.edu > >

32 years

KOGLIST: tovabbitott anyag: re: Psyche in print

by benke＠sfu.ca

>Date: Sun, 24 Apr 1994 12:01:52 +1000 >Reply-To: "PSYCHE: an interdisciplinary journal of research on consciousness" <PSYCHE-L%NKI.BITNET(a)UGA.CC.UGA.EDU> >Sender: "PSYCHE: an interdisciplinary journal of research on consciousness" <PSYCHE-L%NKI.BITNET(a)UGA.CC.UGA.EDU> >From: Kevin Korb <korb(a)bruce.cs.monash.edu.au> >Subject: Psyche in print >X-To: PSYCHE-L%NKI.BITNET(a)cunyvm.cuny.edu >To: Multiple recipients of list PSYCHE-L <PSYCHE-L%NKI.BITNET(a)UGA.CC.UGA.EDU> > > 19 April 1994 > >Hi, > >We at Psyche have printed the first issue in a professional quality >manner and are offering the print version of Psyche for subscription >to individuals and institutions. For distribution to individuals we >will continue to offer Psyche free of charge electronically, as well >as making it accessible at internet archives. We believe it is >nonetheless useful to make Psyche available in a quality printed >version since: many libraries do not yet adequately support the >distribution and archival of electronic journals; many individuals may >wish to keep a printed version on their shelves. Thus, by making >Psyche available in both formats we expect to increase the visibility >and acceptance of consciousness research. > >In order to be successful in this endeavor we require some minimum >number of institutional and individual subscriptions. If you can >subscribe or encourage your library to subscribe please do so. If a >sample issue will aid you in this, please send me an email note to >that effect, with your snail mail address, and I'll send you the >first issue. (Serious inquiries only, please: the first print run is >limited and has cost a good bit of money with no guarantee that the >expenses will be recovered.) > >Subscription info: > >Individual rate: $45 (US; or $55 Australian) >Institutional rate: $90 (US; or $110 Australian) > >Send a check to: > >PSYCHE >Dept. of Computer Science >Monash University >Clayton, Victoria 3169 >AUSTRALIA > >or send VISA or Mastercard account number, expiration date with >signature to the same address. > > >Regards, Kevin Korb > >

32 years

ageing

by Istvan Czigler

Majus 17-en 2 orakor az MTA Pszichologiai Intezete MUHELYBESZELGETESEK sorozataban Czigler Istvan eloadast tart IDOSKORI KOGNITIV VALTOZASOK ES AZ AGYI ESEMENYHEZ KOTOTT POTENCIALOK cimmel. Hely: MTA Pszichologiai Intezete, Bp. VI. Terez krt. 13. eloadoterem. Mindenkit szivesen latunk.

32 years

uj_preprintek

by szepes＠inf.u-szeged.hu

Az alabbi ket dolgozat elerheto a koglist-en: -------------------------------------------------------------------- Cim: A tanulas bonyolultsaga a ``mindennapi'' neuronhalokban Olah Beata & Szepesvari Csaba Absztrakt: Dolgozatunkban a neuronhalozatok toltesenek komplexitas-elmeleti kerdeseivel foglalkozunk. A neuronhalozatok, pontosabban a mesterseges neuronhalozatok idegrendszerunk absztrakt, erosen leegyszerusitett modelljei. A dolgozat egy resze Judd ``Neural network design and the complexity of learning'' c. konyve alapjan keszult (1990, A Bradford Book, MIT Press, Cambridge, Massachuttes). Ebben a konyvben Judd bebizonyitott egy tetelt, mely a neuronhalozatok toltesenek NP-teljesseget mondja ki. Dolgozatunkban egy szigurobb, de jol kovetheto matematikai keretbe helyezzuk Judd eredmenyet, kiemelve, hogy Judd tetele a legrosszabb esetu komplexitasra vonatkozik. Kideritjuk, hogy Judd tetele milyen halozat- es feladat-csaladokra vonatkozik. Kovetkezmenykent bebizonyitjuk pl., hogy a teljesitmeny elvu toltesi feladat is NP-teljes problema. Kiderul azonban az is, hogy Judd tetele a ``mindennapi neuronhalozatokra'' nem alkalmazhato, azaz epp azon neuronhalozatok toltesenek nehezsegerol nem mondd semmit, melyeket leggyakrabban hasznalnak. Elsokent bebizonyitjuk, hogy a Judd-fele un. kiterjesztett feladatokra ezen halok toltese is nehez, NP-teljes. Viszont kiderul, hogy a problema nehezsege itt mar a feladatok komplexitasaban rejlik. A ``hagyomanyos'', binaris feladatok koreben a mindennapi halok toltese megoldhato! Vegul, meg utoljara visszaterve Judd gondolatmenetehez, megvizsgaljuk a neuronhalozatok altalanosito kepessegenek problemajat. ---------------------------------------------------------------------- Cim: Fogalom formalas altalanositassal adaptiv autonom rendszerben Kalmar Zsolt & Szepesvari Csaba & Lorincz Andras Absztrakt: Az autonom rendszerek epitesenek celja kornyezetevel allando interakcioban allo tanulo rendszerek megvalositasa. A rendszer tanulasa arra iranyul, hogy oroklott szuksegleteit (celjait) a leheto legnagyobb foku kielegitettsegi szinten tartsa. Egy autonom rendszer szamara rendkivul fontos, hogy alkalmas fogalmakat alkosson a kornyezeterol. Megfelelo fogalmak segitsegevel meg nem latott helyzetekben is kepes lehet celjai elerese erdekeben cselekedni. Hogy kell egy ``ures lappal'' indulo rendszernek ilyen fogalmakat alkotnia? Hogyan lehet a megalkotott fogalom-bazist karbantartani? Mi az egyes fogalmak alkalmazhatosagi kore? Hogyan vann a fogalmak abrazolva? A hagyomanyos mesterseges intelligencia paradigman belul mar a fenti kerdesek jo resze is szokatlan. Az itt ismertetett megkozelites meglehetosen ujkeleteu. Nezetunk szerint a fogalom alkotast ``gazdasagossagi'' megfontolasok alapjan kell megkozeliteni. A dolgozatban a fogalom formalas elmeleti alapjait dolgozzuk ki a DC modellre (Cs.Szepesvari & A.Lorincz: Behavior of an adaptive self-organizing autonomous agent working with cues and competing concepts. Adaptive Behavior, 2(2):131--160, 1994). Szamitogepes szimulaciok segitsegevel bemutatjuk, hogy a kiterjesztett DC modell kepes fogalmak alkotasara es hasznalatukra. A kialakult fogalmak, a varakozasoknak megfeleloen, valoban nagyon hasznosnak bizonyultak. A rendszer ``teljesitmenyet'' tobb mint ketszeresere noveltek, s emellett az algoritmus memoriaigenye is csokkent. Az algoritmus es kornyezenek szimulacios szoftvere objektum-orientalt fejlesztoi eszkozokkel C++-ban keszult. A dolgozat az ICANN'94 (Int.Conf.on Artificial Neural Networks) konferencian megjeleno anyag kibovitett valtozata. --------------------------------------------------------------------- A dolgozatokat a get preprints kalmar_szepesvari_lorincz.ps illetve get preprints olah_szepesvari.ps utasitasokkal lehet lekerni a listserv(a)cogpsyphy.hu cimrol. FTP-vel is elerhetok a fenti neveken az ftp.cogpshyphy.hu cimrol a koglist/preprints konyvtarbol. A file-ok POSTSCRIPT formatumuak!!! Mindenfele az anyagokkal kapcsolatos megjegyzest szivesen fogadok Szepesvari Csaba Szeged 6720, Aradi vrt. tere 1. Bolyai Matematikai Intezet, JATE szepes(a)csilla.inf.jate.u-szeged.hu

32 years

Moravcsik eloadasa az MTA NyelvTud Int-ben (majus 6, 11 ora)

by Istvan Bodnar

Julius Moravcsik Stanfordi Egyetem (USA) 1994. majus 6-an, penteken, delelott 11 orakor az MTA Nyelvtudomanyi Intezet Konyvtaraban (Budapest I, Szinhaz utca 1 - a Varszinhaz epuleteben) Generics and Logical Form cimmel eloadast tart. Az eloadasra minden erdeklodot szeretettel varnak a szervezok.

32 years

(Fwd) Martin Prinzhorn

by PLEH＠IZABELL.elte.hu

Forwarded message: From: IZABELL/PLEH To: pleh, konya Date: Tue, 3 May 1994 17:20:49 GMT+100 Subject: Martin Prinzhorn Martin Prinzhorn lecturer at Vienna University will be the guest of our cognitive program at Department of General Psychology ELTE, Izabella utca 46. Martin is a generative linguist with a strong footing in cognitive science. He will talk on theory of mind, folk psychology and cognitive theory. His scehedule is: Monday, May, 9th, 6 P.M. Room 216 General overview of his approach. (Regular cognitive seminar time.) Tuesday, Wednesday, Thrusday, 4 P.M. Room 310. Detailed talks Friday: discussion at agreed upon time. Martin will stay at Izabella utca, and will be available on phone: 1-423-130, and email: martin(a)izabell.elte.hu. All are most wellcome, Csaba Pleh Please post !!!!

32 years

Moravcsik szeminarium Platon matematikafilozofiajarol

by Istvan Bodnar

Julius Moravcsik Stanfordi Egyetem (USA): 1994. ma1jus 5-en, csutortokon, kozvetlenul az eloadasat kovetoen, (elorelathatolag kb. d.u. 5:15-tol) az ELTE BTK Gorog Tsz szeminariumaban kotetlen beszelgetesen szamol be Platon matematikafilozofiajarol (A matematikai objektumok statusa Platon filozofiajaban)

32 years

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