VO – Quel bruit fait une bombe atomique lorsqu’elle explose ? Explosion à Mururoa, en juin 1970 (AP Photo).
La plupart des explosions atomiques que nous voyons dans les films et les documentaires sont légèrement modifiées. Le son a été synchronisé avec l'image, quand en réalité l'explosion devrait être entendue environ trente secondes après le flash lumineux. Car les caméras qui les ont filmées étaient placées à plusieurs kilomètres du point de détonation, et la lumière voyage plus vite vers elles que le son. Vendredi, le blog Restricted Data, de l'Institut américain de physique, mettait en ligne l'enregistrement d'une explosion dans lequel le son n'a pas (ou quasiment pas) été édité. On y voit, depuis le lieu où sont rassemblés les journalistes, à 11 km du site, l'explosion d'Annie, Operation Upshot-Knothole, le 17 mars, 1953. Cliquez sur l'image pour voir la vidéo. Et M. Cliquez sur l'image pour voir le fichier MPEG Signaler ce contenu comme inapproprié Cette entrée a été publiée dans Actualité.
Free energy. Evolutionary Mysticism. Videos. From PESWiki This is a topical index of free energy related videos available for viewing online.
They represent data and information on alternative, clean, practical, renewable energy solutions. The multimedia presentations may be viewed in person on stage, projected, transmitted, or played locally with a media player. See also: Free Energy > Videos > The new FreeEnergy.TV site is live! Link Ethics Some people invest a lot of time/effort in producing material with the idea of that material not only providing good info, but also good income. If someone wishes to give their material away, that's great; we appreciate it; and we'll link to it. If you delete a link, please state your reason for doing so. Notation to the effect of "permission certified" should be placed next to each of those links for which such certainty is known. -- Sterling D. Overviews Featured Listings Add-ons Acoustic Levitation Acoustic Levitation Chamber - 1min49sec Algae American Antigravity Films Compressed Air Motors Dr. Dr. Drug policy and the public good: evidence for effective interventions.
Introduction Illicit drugs are a substantial threat to the public good, not only because they adversely affect public health, but also because they can generate crime, disorder, family breakdown, and community decay.
The diverse policies and programmes to ameliorate these problems vary substantially in their effectiveness. Here we review effective interventions to draw attention to the drug-control policies available to governments, in much the same ways as evidence has contributed to debates about more effective tobacco and alcohol policies. Building on the first paper in this series,1 which assessed the extent to which illicit drug use contributes to the global burden of disease, we critically assess the scientific basis of interventions intended to prevent or at least minimise the damage that illicit drugs do to the public good. Much public debate in drug policy is only minimally informed by scientific evidence. Methods and intended effects of drug policy approaches Supply control. Extent of illicit drug use and dependence, and their contribution to the global burden of disease. Introduction Panel 1 Major types of illicit drugs Amphetamine-type stimulants are a class of synthetic, sympathetomimetic amines with powerful stimulant effects on the CNS.Cannabis is a generic term for preparations (eg, marijuana, hashish, and hash oil) derived from the Cannabis sativa plant that produce euphoria and relaxation, heighten the senses, and increase sociability.Cocaine is an alkaloid that is a powerful CNS stimulant derived from the coca plant (Erythroxylum coca).Opioids include derivatives from the opium poppy (Papaver somniferum), such as heroin and morphine, and their synthetic analogues (eg, methadone, fentanyl).
Opioids relieve pain, produce euphoria, and can cause coma and respiratory depression in high doses. Panel 2 Search strategy and selection criteria The prevalence of drug use and dependence Panel 3 How do we estimate the number of people who use illicit drugs? How well do international drug conventions protect public health? This article can be found in the following collections: Public Health;Psychiatry(Drug & alcohol misuse) Copyright © 2012 Elsevier Ltd All rights reserved.
The Single Convention on Narcotic Drugs in 1961 aimed to eliminate the illicit production and non-medical use of cannabis, cocaine, and opioids, an aim later extended to many pharmaceutical drugs. Over the past 50 years international drug treaties have neither prevented the globalisation of the illicit production and non-medical use of these drugs, nor, outside of developed countries, made these drugs adequately available for medical use. The system has also arguably worsened the human health and wellbeing of drug users by increasing the number of drug users imprisoned, discouraging effective countermeasures to the spread of HIV by injecting drug users, and creating an environment conducive to the violation of drug users' human rights.
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