LiL'ShaO a écrit:
Un petit document sur les crops circles :
http://300gp.ovh.net/~ufopubli/video/crop01.wmvDes réactions? Non? Ca m'étonne pas!

Andrews, Moulton Howe, Silva, Glickman, belle brochette. Manque juste Lucy Pringle en fait.
Denis a écrit:
La "trouvaille" de Chorost et Dudley date de plus de 15 ans. À peu près autant que celle de Péoc'h sur les poussins télékynésistes.
Quinze ans, c'est long pour "ne pas vérifier" une pareille découverte.
Il n'y a rien à vérifier puisque les auteurs eux-mêmes se sont rétractés. Quelques mois plus tard, ils ont publié dans le même journal du Mufon un article intitulé
What happened to the radionuclides paper dont voici quelques extraits*:
Chorost/Dudley a écrit:
In the winter of 1991 we circulated a paper in manuscript claiming to have discovered 13 unusual radioactive isotopes in soil samples from an English crop circle. We argued that the isotopes were products of a type of radioactive bombardment called "deuteron activation". We are satisfied with our logic, but, unfortunately, the basic data turned out to be less solid than we had believed. For that reason we pulled the paper from publication, and are withdrawing some of the claims we made in it.
[...]
The gamma spectroscopy was performed on August 26th 1991. The results were supplied to us in the form of computer-processed table of “peaks”. Each radioisotope has a characteristic signature composed of several peaks. When we first saw the data we felt sure there was something significant in it. The control had 90 peaks, and sample 1 had 200 peaks! This looked like very strong evidence that there was something in the sample that was not in the control.
Due to the government lab’s security restrictions we were unable to view the raw data, which the computer had processed to make the table of peaks. However, we assumed that the lab had followed consistent and statistically valid procedure in processing the three samples data, so we felt safe in working with the table of peaks. We later found that this assumption was incorrect.
Not knowing this at the time, we proceeded with the analysis. Using the peak tables we identified 13 highly unusual radioactive isotopes in sample 1A, and one (possible two) in 1B. These isotopes were not known to be produced in nature, nor were they known to be emissions from atomic tests, nuclear power plants, or Chernobyl. We carefully considered a variety of other mundane causes: natural radionuclides, cosmogenic radionuclides, sample jar contamination, airport x-ray detectors, thermal neutron activators and contamination with hospital waste by hoaxers. None of them held up as valid sources for the isotopes.
Many of the possible sources were ruled out by the fact that many of the isotopes had half-lives of about two weeks, which indicated that they had not been in existence for very long. It seemed reasonable to guess that they had been formed when the crop circle itself was. Since the 13 isotopes had one, and only one, common denominator – the property of being producible by bombardment with heavy hydrogen nuclei – we proposed that that was indeed what had happened.
We were very excited by this theory, because if it was true, it meant that something extraordinary exotic had happened when the crop circle was formed. Hoaxers could not possibly have done it. We wrote up our findings and circulated the manuscript quite widely.
The paper was slated to be published in February 1992, but just prior to publication we were afforded the opportunity to view the lab’s raw data. We were dismayed to discover that many of the peaks were so close to the noise level that we could not be sure they really existed. The lab’s computer had been programmed to hunt for peaks quite aggressively, identifying many of them on statistically inadequate grounds.
Furthermore, the lab had made appalling errors on handling the samples. [..] We pulled the paper.
[..]
What lessons should we (and other cereologists) draw from our troubles? First, the recognition that scientists and scientific labs are fallible, and their claims should never be uncritically accepted, but rather probed, questioned, and replicated by others.
*Merci à Rob Irving
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Jean-Francois a écrit:
Faut dire qu'il n'a pas beaucoup
de mémoire.
C'est vrai que s'exciter sur la vidéo d'Oliver's Castle en 2006, c'est amusant.
Il y a un autre truc amusant c'est quand il écrit:
Lil'Shao a écrit:
Sinon, explique moi d'ou viennent les cercles de culture particulierement complexes qui apparaissent dans les champs, les rizieres, la neige, en quelques minutes partout a travers le monde...
S'il te plait épargne moi l'explication des farceurs avec leurs planches en bois qui n'arrivent qu'a reproduire de pales copies des "originaux" ou les champs sont "tressés" d'une maniere spécifique qui demanderait des jours de travail a des dizaines de farceurs...
Une idée monsieur le zézé?
puis ensuite:
Lil'Shao a écrit:
C'est deja pas mal que tu reconnaisses ne pas etre informé sur le sujet, venant d'un zézé c'est assez rare pour etre remarqué...
Tiens deja un petit lien pour observer un certains nombres de crop circles :
http://bioch.szote.u-szeged.hu/astrojan/cropcirc.htmIl se trouve que justement dans le lien donné par Lil'Shao on trouve au moins un CC dont l'origine humaine est bien établie puisqu'il a été réalisé dans le cadre d'un documentaire télé. Comme, en grand spécialiste qu'il est, Lil'Shao sait parfaitement faire la différence entre les formations particulièrement complexes des pâles copies des farceurs, ça va lui être facile de nous trouver parmi cette petite centaine de CC, lequel est un faux grossièrement humain. Et sans faire de recherche sur le net merci. Allez on l'encourage.
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Jean-Francois a écrit:
J'ai cherché un peu sur les auteurs. Je n'ai rien trouvé de sûr concernant Chorost (à cause d'un homonyme (?) connu pour un bouquin sur les implants cochléaires) mais suis tombé sur la (une?)
page web de Marshall Dudley. Un sacré crédule, à mon avis, près à préférer voir des "anomalies" dans des photos ratées alors que celles-ci s'explique passablement mieux par des problèmes de pellicules et/ou d'appareil. Les artefacts "be-zarres", il semble bien aimer.
Son interprétation "anomalie spatio-temporelle" des anté- et pénultièmes photos (env. 75% de la page, vers le bas) est franchement ridicule et révélatrice de son "wishful thinking". Il s'agit beaucoup plus probablement d'un mouvement du photographe sur un temps d'exposition un peu long ou d'un problème avec le coulissement du miroir de l'appareil (dans le cas d'un reflex).
Jean-François
En effet.