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Message par yanis la chouette le Ven 31 Mar - 18:20

Bonjour Tignard
Octobre 2016, CIWF France dévoilait la réalité de l’élevage intensif en France au cinéma et sur les réseaux sociaux, à travers plusieurs spots. L’un d'eux exposait les conditions d’élevage de 95% des cochons français. Suite à cette campagne, les représentants de la filière porcine nous ont assignés en justice. Nous avons aujourd’hui besoin de votre soutien, pouvons-nous compter sur vous ?
Je soutiens CIWF
Pourquoi cette assignation en justice ? Parce que le Centre de Documentation des Métiers du Porc, estime que notre message « n’achetez pas de viande issue d’élevages industriels » est un « appel au boycott fautif » et que notre campagne cause un « préjudice important aux professionnels de la filière porcine française ».
L'élevage intensif est le vrai coupable
Notre mission est de dénoncer l’élevage industriel et d’encourager les modes d’élevage plus respectueux du bien-être animal. C’est pour cela que vous nous faites confiance. Nos actions ont pour but d’informer les consommateurs sur la réalité et l’étendue de l’élevage intensif et les alternatives qui existent, pour leur permettre de faire des choix éclairés. L’industrie ne nous fera pas taire.
Je sais que vous aussi Tignard, vous jugez que l’élevage intensif est le vrai coupable : aidez-nous à continuer à agir pour les animaux, qui sont les vraies victimes.
Je fais un don
La procédure en justice durera plusieurs mois et engendre des frais. Donnez-nous les moyens de défendre notre liberté de parole et de défendre les animaux.
Merci de votre soutien et votre générosité, plus que jamais nécessaires.
Léopoldine Charbonneaux
Directrice CIWF France


Laika (Russian: Лайка [lajka]); c. 1954 – November 3, 1957) was a Soviet space dog who became one of the first animals in space, and the first animal to orbit the Earth. Laika, a stray dog from the streets of Moscow, was selected to be the occupant of the Soviet spacecraft Sputnik 2 that was launched into outer space on November 3, 1957.

Little was known about the impact of spaceflight on living creatures at the time of Laika's mission, and the technology to de-orbit had not yet been developed, and therefore Laika's survival was not expected. Some scientists believed humans would be unable to survive the launch or the conditions of outer space, so engineers viewed flights by animals as a necessary precursor to human missions.[1] The experiment aimed to prove that a living passenger could survive being launched into orbit and endure a Micro-g environment, paving the way for human spaceflight and providing scientists with some of the first data on how living organisms react to spaceflight environments.

Laika died within hours from overheating, possibly caused by a failure of the central R-7 sustainer to separate from the payload. The true cause and time of her death were not made public until 2002; instead, it was widely reported that she died when her oxygen ran out on day six or, as the Soviet government initially claimed, she was euthanised prior to oxygen depletion.

On April 11, 2008, Russian officials unveiled a monument to Laika. A small monument in her honour was built near the military research facility in Moscow that prepared Laika's flight to space. It features a dog standing on top of a rocket. She also appears on the Monument to the Conquerors of Space in Moscow.


European Parliament President, Antonio Tajani, phone conversation with National Assembly Speaker, Julio Borges, on the alarming situation in Venezuela
Press Release

European Parliament President, Antonio Tajani, has denounced the recent rulings of the Supreme Court of Venezuela, which go against democracy and violate the principle of separation of powers.

President Tajani spoke with his counterpart, the President of the National Assembly of Venezuela, Julio Borges, to pass on the support of the European Parliament and declared:

“Today is a very sad day for democracy. Latin America has been experiencing important and positive changes in the last years but, today, we deplore that Venezuela has taken a step backwards from democracy”.

“We demand respect for democracy, human rights and the principle of separation of powers, as enshrined in the Constitution of Venezuela. A democracy respects its own Constitution.”

President Tajani followed up by contacting the leaders of the European Parliament’s political groups to include a debate in the agenda of the next session of the European Parliament on the serious situation of Venezuela next week.

“The European Parliament will always defend human rights, democracy and the rule of law in the world,” underscored, President Tajani.

The rulings of the Supreme Court of Justice deprive the members of the National Assembly of their parliamentary immunity, and at the same time, takes over legislative power from the National Assembly.

To read the letter that President Tajani sent to President Borges, please see the attached file.
For further information:
Carlo Corazza
Spokesperson of the President
+32 498 99 28 62

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Message par yanis la chouette le Ven 31 Mar - 18:22

The following Social Security Office(s) are closed Friday, March 31, 2017:

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This page is updated every 10 minutes. Please check back for the latest information about office closings and delays and to subscribe to your state/territory.

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Sputnik 2
Romanian stamp from 1959 with Laika (the caption reads "Laika, first traveller into Cosmos")
Main article: Sputnik 2

After the success of Sputnik 1 in October 1957, Nikita Khrushchev, the Soviet leader, wanted a spacecraft launched on November 7, 1957, the 40th anniversary of the October Revolution. Construction had already started on a more sophisticated satellite, but it would not be ready until December; this satellite would later become Sputnik 3.[2]

Meeting the November deadline meant building a new craft. Khrushchev specifically wanted his engineers to deliver a "space spectacular", a mission that would repeat the triumph of Sputnik 1, stunning the world with Soviet prowess. Planners settled on an orbital flight with a dog. Soviet rocket engineers had long intended a canine orbit before attempting human spaceflight; since 1951, they had lofted 12 dogs into sub-orbital space on ballistic flights, working gradually toward an orbital mission set for some time in 1958. To satisfy Khrushchev's demands, they expedited the orbital canine flight for the November launch.[3]

According to Russian sources, the official decision to launch Sputnik 2 was made on October 10 or 12, leaving less than four weeks to design and build the spacecraft.[4] Sputnik 2, therefore, was something of a rush job, with most elements of the spacecraft being constructed from rough sketches. Aside from the primary mission of sending a living passenger into space, Sputnik 2 also contained instrumentation for measuring solar irradiance and cosmic rays.[2]

The craft was equipped with a life-support system consisting of an oxygen generator and devices to avoid oxygen poisoning and to absorb carbon dioxide. A fan, designed to activate whenever the cabin temperature exceeded 15 °C (59 °F), was added to keep the dog cool. Enough food (in a gelatinous form) was provided for a seven-day flight, and the dog was fitted with a bag to collect waste. A harness was designed to be fitted to the dog, and there were chains to restrict her movements to standing, sitting, or lying down; there was no room to turn around in the cabin. An electrocardiogram monitored heart rate and further instrumentation tracked respiration rate, maximum arterial pressure, and the dog's movements.[5][6]

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Message par yanis la chouette le Ven 31 Mar - 18:24

31 March 2017

When his father was diagnosed with a debilitating disease four years ago, it sparked Ivo Vieira into developing a novel means of communication for people coping with extreme limitations, building on technology originally explored to help ESA astronauts in space.

Amyotrophic lateral sclerosis – ALS – and other forms of motor neurone disease gradually rob sufferers of their muscular function, including the ability to communicate verbally. However, eye movement presents an opportunity because it usually remains unimpaired.

“We had been working on augmented reality for astronauts since 2005, so when my father was diagnosed I had the idea of exploiting it to improve his life with a new mobile communication system,” said Ivo Vieira, CEO of LusoSpace.
EyeSpeak glasses

This ESA effort led LusoSpace to produce its first pair of augmented reality glasses in 2008 and then to set up the LusoVu company to develop them for the disabled.

EyeSpeak glasses detect the movement of the eyes across a virtual keyboard displayed on the inside of its lenses. Words and phrases spelled out by the wearer are translated by the built-in software and spoken by speakers in one arm.

The glasses can also let the user navigate the Internet, watch videos and access emails privately, as only the user sees what is being projected inside the lens. However, as the digital information is overlaid on the lens, users can still see what is going on around them.

(Video: Courtesy of LusoVu)

“This is the first such device that is standalone and can be used in any location and physical position, regardless of the orientation of the wearer’s head,” noted Teresa Nicolau, EyeSpeak specialist.
Help for astronauts

EyeSpeak is a direct spin-off from the work LusoSpace did for an ESA study on visualisation tools for astronauts.

“At that time astronauts had only relatively rudimentary systems available during spacewalks, with a written checklist on their arm and voice communications with ground controllers,” explained ESA’s João Pereira do Carmo.

“We wanted to explore the many technologies becoming available that could be used to give them real-time, important information directly in their field of view.”
Prototype testing

Initial technology developments were followed by a Kickstarter campaign in 2014, which resulted in 45 EyeSpeak prototype units in 2015. The current EyeSpeak 1, which went on sale in March 2016, is based on a pair of Epson BT-200 AR glasses with an add-on unit of a microphone, speakers and a tiny camera controlled by a microprocessor unit. It comes either with a standard synthesised voice or the owner’s voice based on previously made recordings.

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Message par yanis la chouette le Ven 31 Mar - 18:25

Dyslipidémies, enfin des recos HAS actualisées !

Les dernières recommandations nationales sur les dyslipidémies dataient de 2005. C’est dire si la nouvelle édition publiée ce jeudi par la HAS est la bienvenue. Elle donne des repères thérapeutiques en accordant une large part aux modifications du mode de vie tout en conservant la notion de cibles de cholestérol-LDL.

Offrir aux généralistes une aide pratique à l'évaluation du risque cardio-vasculaire et à la prescription… Tel est l’objectif affiché des nouvelles recommandations de la HAS sur les dyslipidémies. Déclinée sous formes de quatre « fiches mémo » (voir ici), la nouvelle feuille de route « s’appuie sur une analyse des recommandations internationales et des méta-analyses les plus importantes, essentiellement celle de la Cochrane et celle de la Cholesterol Treatment Trialists’ Collaboration », précise Emmanuel Nouyrigat (chef de projet à la HAS).

Le risque CV prime…

Premier point important : elles soulignent d’emblée que le repérage et le traitement des dyslipidémies ne se conçoivent que dans le cadre plus large de la prise en charge du risque CV global. « Nous avons complètement changé de paradigme, explique le Dr Michel Laurence (chef du service des recommandations des bonnes pratiques professionnelles). L’élément capital est l’évaluation du risque CV qui doit être réalisée chez tout patient après 40 ans et dont la dyslipidémie n’est qu’un des éléments au même titre que l’HTA, le diabète ou le tabagisme. Une dyslipidémie simple ne doit pas être traitée de façon isolée, mais en fonction des autres facteurs de risque ». Pour cela l’équation SCORE est recommandée, en prévention primaire, chez les personnes de 40 à 65 ans. Quatre niveaux de risque sont identifiés. La présence d’un diabète, d’une insuffisance rénale... est aussi à prendre en compte.

… mais la notion de valeurs cibles reste

La principale interrogation concernait les cibles thérapeutiques. La HAS allait-elle suivre les guidelines américaines et supprimer les valeurs cibles de cholestérol-LDL (LDL-C ) ou les conserver comme l’ont fait l’European Society of Cardiology et les sociétés savantes françaises (SFE, SFD et NSFA) dans leurs dernières recommandations ? Le choix de la HAS a été de conserver les valeurs cibles de LDL-C, qui guident toujours le traitement.

Lire l'interview du Dr Rémy Boussageon « Les cibles de LDL ont un inconvénient majeur »

Cependant, par souci de clarté, les objectifs thérapeutiques deviennent équivalents aux seuils d’intervention :
- LDL-C <1,90 g/l en cas de niveau de risque faible (score<1%) et <1,30 g/l en cas de niveau de risque modéré (<5%), ces objectifs devant être atteints par une modification du mode de vie en première intention. Si l’objectif n’est pas atteint après 3 mois, il est recommandé d’associer un hypolipémiant. « Mais il faut que les modifications du mode de vie soient effectives, estime le Dr Nouyrigat. Le médecin peut prolonger encore 3 mois cette période avant de prescrire un médicament.»
- LDL-C <1g/l, en cas de niveau de risque élevé (5 à 10%), et <0,70 g/l en cas de risque très élevé (>10%). La prescription d’un hypolipémiant est recommandée d’emblée, toujours en association à une modification du mode de vie. Si l’objectif n’est pas atteint au bout de trois mois, le traitement médicamenteux doit être intensifié.

Pourquoi ne pas avoir abandonné les objectifs lipidiques comme le prônent les recommandations américaines ? « Les Américains estiment que les cibles de LDL-C n’ont pas été évaluées par des essais de recherche de doses sur les statines, commente Emmanuel Nouyrigat. Néanmoins, il y a un consensus au niveau européen et français pour dire qu’il est important dans la pratique quotidienne de fixer un objectif pour le suivi du patient. C’est plus compréhensible pour le patient et c’est un facteur d’adhésion au traitement. Par ailleurs les Américains recommandent trois niveaux d'intensité de traitement par statine en fonction de la diminution de LDL-C attendue et évoquent la possibilité de dosages du cholestérol au cours du suivi, donc cela ne change pas fondamentalement les modalités de traitement. »

La notion de cible de LDL-C pour poser l’indication thérapeutique implique qu’une personne ayant un risque cardiovasculaire élevé, mais un LDL-C dans les normes ne serait pas traité par statines. Or ces médicaments sont classiquement recommandés, quelles que soient les concentrations de LDL-C chez les patients diabétiques et après un premier AVC. « En prévention secondaire, la cible de LDL-C est <0,70 g/l », note le Dr Laurence. Mais, en pratique on ne voit jamais de concentrations spontanément inférieures.

La simvastatine et l’atorvastatine sont recommandées du fait de leur meilleur rapport coût/efficacité. Si l’objectif cible n’est pas atteint avec la dose maximale tolérée de statine, une association avec l’ézétimibe ou, en dernier lieu, avec la cholestyramine est recommandée.

Les recos accordent aussi une grande importance aux modifications du mode de vie, qui fait l’objet d’une fiche mémo distincte. « Prescrire une statine dès que le LDL-C est élevé n’est pas le bon réflexe aujourd’hui », souligne le Dr Laurence.

Mollo chez les séniors

Les recommandations sont très prudentes concernant les personnes les plus âgées. « Chez les plus de 80 ans, en l’absence de données, l’instauration d’un traitement par statine n’est pas recommandé », précise la HAS. En revanche, la poursuite d’un traitement est possible s’il est bien toléré. Entre 65 et 80 ans, les règles de prescription des statines sont les mêmes que chez les plus jeunes. Cependant, le texte apporte une nuance en recommandant d’avoir une discussion avec ces patients sur les risques et les bénéfices du traitement par statine « afin qu’ils puissent prendre une décision au sujet de la prise de statines sur le long terme ».

Un focus est fait sur l’hypercholestérolémie familiale hétérozygote. Elle doit être suspectée lorsque le LDL-C est ≥ 1,9 g/l chez l’adulte et ≥ 1,6 g/l chez l’enfant. Dès 20 ans, la prise en charge est identique à celle des patients ayant une hypercholestérolémie isolée, au minimum à risque cardiovasculaire élevé.

En cas d’hypertriglycéridémie sévère, l’objectif est d’abaisser la triglycéridémie en-deçà de 5 g/l pour prévenir une pancréatite. La fiche préconise également la prescription d’un fibrate.

Anti PCS-K9 : la HAS joue la carte de la prudence

Deux anticorps anti-PCSK9 ont l’AMM pour les patients atteints d’hypercholestérolémies familiales homozygotes, mais aussi pour ceux ayant une hypercholestérolémie primitive ou une dyslipidémie mixte lorsque les concentrations de cholestérol-LDL sont insuffisamment abaissées par une statine à dose maximale tolérée ou en cas d’intolérance aux statines. La HAS reste très prudente concernant ce deuxième type d’indications, soulignant que la place de ces médicaments reste à définir car « leur effet sur la morbidité et la mortalité cardio-vasculaires n’a pas encore été déterminé ». À noter qu’une diminution des événements CV a été observée dans les études Osler et Fourier, mais demande a être confirmée sur de plus larges effectifs.

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Message par yanis la chouette le Ven 31 Mar - 18:30

NASA Tests Robotic Ice Tools

Want to go ice fishing on Jupiter's moon Europa? There's no promising you'll catch anything, but a new set of robotic prototypes could help.

Since 2015, NASA's Jet Propulsion Laboratory in Pasadena, California, has been developing new technologies for use on future missions to ocean worlds. That includes a subsurface probe that could burrow through miles of ice, taking samples along the way; robotic arms that unfold to reach faraway objects; and a projectile launcher for even more distant samples.

All these technologies were developed as part of the Ocean Worlds Mobility and Sensing study, a research project funded by NASA's Space Technology Mission Directorate in Washington. Each prototype focuses on obtaining samples from the surface -- or below the surface -- of an icy moon.

"In the future, we want to answer the question of whether there's life on the moons of the outer planets -- on Europa, Enceladus and Titan," said Tom Cwik, who leads JPL's Space Technology Program. "We're working with NASA Headquarters to identify the specific systems we need to build now, so that in 10 or 15 years, they could be ready for a spacecraft."

Those systems would face a variety of challenging environments. Temperatures can reach hundreds of degrees below freezing. Rover wheels might cross ice that behaves like sand. On Europa, surfaces are bathed in radiation.

"Robotic systems would face cryogenic temperatures and rugged terrain and have to meet strict planetary protection requirements," said Hari Nayar, who leads the robotics group that oversaw the research. "One of the most exciting places we can go is deep into subsurface oceans -- but doing so requires new technologies that don't exist yet."
› DOWNLOAD VIDEO Exploring Ocean Worlds with Robots

A hole in the ice

Brian Wilcox, an engineering fellow at JPL, designed a prototype inspired by so-called "melt probes" used here on Earth. Since the late 1960s, these probes have been used to melt through snow and ice to explore subsurface regions.

The problem is that they use heat inefficiently. Europa's crust could be 6.2 miles deep or it could be 12.4 miles deep (10 to 20 kilometers); a probe that doesn't manage its energy would cool down until it stopped frozen in the ice.

Wilcox innovated a different idea: a capsule insulated by a vacuum, the same way a thermos bottle is insulated. Instead of radiating heat outwards, it would retain energy from a chunk of heat-source plutonium as the probe sinks into the ice.

A rotating sawblade on the bottom of the probe would slowly turn and cut through the ice. As it does so, it would throw ice chips back into the probe's body, where they would be melted by the plutonium and pumped out behind it.

Removing the ice chips would ensure the probe drills steadily through the ice without blockages. The ice water could also be sampled and sent through a spool of aluminum tubing to a lander on the surface. Once there, the water samples could be checked for biosignatures.

"We think there are glacier-like ice flows deep within Europa's frozen crust," Wilcox said. "Those flows churn up material from the ocean down below. As this probe tunnels into the crust, it could be sampling waters that may contain biosignatures, if any exist."

To ensure no Earth microbes hitched a ride, the probe would heat itself to over 900 degrees Fahrenheit (482 degrees Celsius) during its cruise on a spacecraft. That would kill any residual organisms and decompose complex organic molecules that could affect science results.

A longer reach

Researchers also looked at the use of robotic arms, which are essential for reaching samples from landers or rovers. On Mars, NASA's landers have never extended beyond 6.5 to 8 feet (2 to 2.5 meters) from their base. For a longer reach, you need to build a longer arm.

A folding boom arm was one idea that bubbled up at JPL. Unfolded, the arm can extend almost 33 feet (10 meters). Scientists don't know which samples will be enticing once a lander touches down, so a longer reach could give them more options.

For targets that are even farther away, a projectile launcher was developed that can fire a sampling mechanism up 164 feet (50 meters).

Both the arm and the launcher could be used in conjunction with an ice-gripping claw. This claw could someday have a coring drill attached to it; if scientists want pristine samples, they'll need to bore through up to eight inches (about 20 centimeters) of Europa's surface ice, which is thought to shield complex molecules from Jupiter's radiation.

After deployment from a boom arm or a projectile launcher, the claw could anchor itself using heated prongs that melt into the ice and secure its grip. That ensures that a drill's bit is able to penetrate and collect a sample.

Wheels for a cryo-rover

In July, NASA will mark a 20-year legacy of rovers driving across Martian desert, harkening back to the July 4, 1997 landing of Mars Pathfinder, with its Sojourner rover.

But building a rover for an icy moon would require a rethink.

Places like Saturn's moon Enceladus have fissures that blow out jets of gas and icy material from below the surface. They'd be prime science targets, but the material around them is likely to be different than ice on Earth.

Instead, tests have found that granular ice in cryogenic and vacuum conditions behaves more like sand dunes, with loose grains that wheels can sink into. JPL researchers turned to designs first proposed for crawling across the moon's surface. They tested lightweight commercial wheels fixed to a rocker bogey suspension system that has been used on a number of JPL-led missions.

The next steps

Each of these prototypes and the experiments conducted with them were just starting points. With the ocean worlds study complete, researchers will now consider whether these inventions can be further refined. A second phase of development is being considered by NASA. Those efforts could eventually produce the technologies that might fly on future missions to the outer solar system.

This research was funded by NASA's Space Technology Mission Directorate's Game Changing Development Program, which investigates ideas and approaches that could solve significant technological problems and revolutionize future space endeavors.

Caltech manages JPL for NASA.

For more information on Ocean Worlds Europa Technologies, visit:


NASA will hold a news conference at noon PDT (3 p.m. EDT) Tuesday, April 4, at the agency's Jet Propulsion Laboratory in Pasadena, California, to preview the beginning of Cassini's final mission segment, known as the Grand Finale, which begins in late April. The briefing will air live on NASA Television and the agency's website.

Cassini has been orbiting Saturn since June 2004, studying the planet, its rings and its moons. A final close flyby of Saturn's moon Titan on April 22 will reshape the Cassini spacecraft's orbit so that it begins its final series of 22 weekly dives through the unexplored gap between the planet and its rings. The first of these dives is planned for April 26. Following these closer-than-ever encounters with the giant planet, Cassini will make a mission-ending plunge into Saturn's upper atmosphere on Sept. 15.

The panelists for the briefing are:

Jim Green, director of NASA's Planetary Science Division at the agency's headquarters in Washington
Earl Maize, Cassini project manager at JPL
Linda Spilker, Cassini project scientist at JPL
Joan Stupik, Cassini guidance and control engineer at JPL

The event will also be streamed live at:

Media and the public also may ask questions during the briefing on Twitter using the hashtag #askNASA.

Supporting graphics, video and background information about Cassini's Grand Finale will be posted before the briefing at:

The Cassini mission is a cooperative project of NASA, ESA (European Space Agency) and the Italian Space Agency. JPL, a division of Caltech in Pasadena, California, manages the mission for NASA's Science Mission Directorate in Washington. JPL designed, developed and assembled the Cassini orbiter.

For more information about Cassini, go to:


News Media Contact
Preston Dyches
Jet Propulsion Laboratory, Pasadena, Calif.

Dwayne Brown / Laurie Cantillo
NASA Headquarters, Washington
202-358-1726 / 202-358-1077 /


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Message par yanis la chouette le Ven 31 Mar - 18:33

NASA Announces Astronomy and Astrophysics Fellows for 2017

The 2017 Sagan Fellows are, from left: Raphaelle Haywood, Harvard College Observatory, Cambridge, Massachusetts; Benjamin Pope, New York University; Andrew Vanderburg, University of Texas, Austin. Credit: NASA/JPL-Caltech
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NASA has selected 28 fellows for its prestigious Einstein, Hubble and Sagan fellowships. Each post-doctoral fellowship provides three years of support to awardees to pursue independent research in astronomy and astrophysics. The new fellows will begin their programs in the fall of 2017 at a host university or research center of their choosing in the United States.

"We are thrilled to have some of the most exciting young scientists in the world to help us explore the mysteries of the cosmos," said Paul Hertz, Astrophysics Division director at NASA Headquarters, Washington. "We look forward to all the great science they will do in the next three years during their fellowships."

Participants in the Einstein fellows program conduct research broadly related to the mission of NASA's Physics of the Cosmos (PCOS) program, which aims to expand our knowledge of the origin, evolution and fate of the universe. The PCOS program consists of a suite of operating science missions and possible future missions that focus on specific aspects of these questions.

"We are looking forward to welcoming this talented group of young scientists as the incoming Einstein Fellows, and to learning more about their work," said Belinda Wilkes, Director of the Chandra X-ray Center at the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, which manages the Einstein Fellows program for NASA. "Their research is diverse, covering the full range of PCOS science, and promises to significantly expand and advance the astrophysics research being carried out by NASA and its world-class science missions."

The eight new Einstein Fellows are listed below in alphabetical order with their host institutions:

Vivienne Baldassare, Yale University
Jennifer Barnes, Undecided
Rahul Kannan, Smithsonian Astrophysical Observatory
Philip Mocz, Princeton University
Alexander Philippov, University of California, Berkeley
Anna Rosen, Harvard University
Zachary Slepian, Lawrence Berkeley National Laboratory
Krista Smith, Kavli Institute for Particle Astrophysics and Cosmology

Participants in the Hubble Fellowship program conduct research broadly related to the mission of NASA's Cosmic Origins (COR) program, which aims to examine the origins of galaxies, stars and planetary systems, and the evolution of these structures with cosmic time. The COR program consists of a suite of operating science missions and possible future missions that focus on specific aspects of these questions.

"Congratulations to all of the new Hubble Fellows. It's an impressive class, and I have no doubt that they will continue the rich tradition of being leaders in the field of astronomy and astrophysics. As a former fellow and director of the Space Telescope Science Institute (STScI) in Baltimore, Maryland, where these fellowships originated back in the early 1990s, it is a pleasure to sign their award letters and welcome them as new fellows," said Ken Sembach. "They now have a rare, wonderful opportunity to experience scientific freedom and expand their scientific horizons on a path of their choosing. I wish them all the best and eagerly look forward to their accomplishments."

Each year, the current Hubble Fellows convene for a three-day symposium to present results of their recent research and to meet with other Hubble Fellows and the scientific and administrative staff who manage the program for NASA. The 2017 symposium was held in Baltimore on March 13-15.

The 17 new Hubble Fellows are listed below in alphabetical order with their host institutions:

Rachael Beaton, Princeton University
Ivan Cabrera Ziri Castro, Harvard College Observatory
Ena Choi, Columbia University
Susan Clark, Institute for Advanced Study
Wen-fai Fong, University of Arizona
Katheryn Decker French, Carnegie Observatories
Anne Jaskot, University of Massachusetts
Alexander Ji, Carnegie Observatories
Sebastiaan Krijt, University of Chicago
Sarah Loebman, University of California, Davis
Brett McGuire, National Radio Astronomy Observatory
Evan Schneider, Princeton University
Jordan Stone, University of Arizona
Johanna Teske, Carnegie Institution
Siyao Xu, University of Wisconsin - Madison
Ke Zhang, University of Michigan
George Zhou, Smithsonian Astrophysical Observatory

The Sagan Fellowship supports scientists whose research is aligned with NASA's Exoplanet Exploration program. The primary goal of this program is to discover and characterize planetary systems and Earth-like planets around other stars. The current and past Sagan Fellows will meet in Pasadena, California, at the Sagan Fellows Symposium later this year to take advantage of networking opportunities and update their peers on their research efforts.

"The field of exoplanets continues to explode with new discoveries and advancements each day. The Sagan fellows will contribute to these advancements by pushing the boundaries with their research." said Sagan Program Scientist Dawn Gelino, deputy director for the NASA Exoplanet Science Institute at Caltech in Pasadena.

The three 2017 Sagan Fellows are listed below with their host institutions:

Raphaelle Haywood, Harvard College Observatory
Benjamin Pope, New York University
Andrew Vanderburg, University of Texas, Austin

The Chandra X-ray Center administers the Einstein Fellowships for NASA. NASA's Marshall Space Flight Center in Huntsville, Alabama, manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations. STScI administers the Hubble Fellowships for NASA. STScI is the science operations center for the Hubble Space Telescope and the science and mission operations center for the James Webb Space Telescope, scheduled for launch in 2018. STScI is operated for NASA by the Association of Universities for Research in Astronomy, in Washington. The NASA Exoplanet Science Institute, which is operated at Caltech in coordination with the Jet Propulsion Laboratory, administers the Sagan Fellowship Program for NASA.

A full list of the 2017 fellows and other information about these programs is available at:

For more information about NASA's Astrophysics Division, visit:

News Media Contact
Felicia Chou
NASA Headquarters, Washington

Megan Watzke Chandra X-ray Center, Cambridge, Massachusetts

Cheryl Gundy Space Telescope Science Institute, Baltimore, Maryland

Elizabeth Landau
Jet Propulsion Laboratory, Pasadena, California



Guy Casadamont

Gaston H, père de Daniel, un tir pour l'Apocalypse

Conférence / débat

Jeudi 27 avril 2017
20 h 30
Maison des Syndicats,
1 Place de l'Etat, Ile de Nantes, salle A.

Conférences 2017

Ornamentos sagrados, Jean Lurçat, Le chant du monde, (Angers).

En 2013, Joëlle Oury publie chez Hermann dans la collection
« Psychanalyse », sa thèse de médecine soutenue en 1970 et largement remaniée pour cette publication. Titre du livre : Daniel H. La modeste contribution d'un pâtissier à l'équilibre terrestre… Le soir de Noël 1955, Daniel H. dépose une bombe à Paris au Sacré-Cœur. Elle n'explosera pas.

Dans la Préface à l'ouvrage de J. Oury, Jean Allouch saluant cette monographie clinique approfondie, indique qu'une piste n'a pas été ouverte, celle d'une folie à deux (ou à plusieurs) qui lierait notamment le fils au père, lui-même interné quelques décennies plus tôt, après avoir tiré sur son fils. D'où la question : « Existe-t-il, dans quelque archive, un dossier « Gaston H. » ?

C'est à l'endroit de cette question que nous avons entrepris une recherche qui nous mena à consulter les archives psychiatriques afin d'explorer la piste proposée.
À tout le moins les surprises ne manquent pas, « abasourdissantes ».

Ouvrage conseillé, outre le livre de Joëlle Oury:
Jean Allouch, Marguerite, ou l'Aimée de Lacan, Postface de Didier Anzieu, [1990], 2e édition revue et augmentée, Paris, Epel, 1994.

Pour télécharger l'annonce cliquez ici.
Contact :
Participation aux frais, 10 euros (ou selon possibilités).

yanis la chouette

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Message par yanis la chouette le Ven 31 Mar - 18:34

NuSTAR Probes Puzzling Galaxy Merger

A supermassive black hole inside a tiny galaxy is challenging scientists' ideas about what happens when two galaxies become one.

Was 49 is the name of a system consisting of a large disk galaxy, referred to as Was 49a, merging with a much smaller "dwarf" galaxy called Was 49b. The dwarf galaxy rotates within the larger galaxy's disk, about 26,000 light-years from its center. Thanks to NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) mission, scientists have discovered that the dwarf galaxy is so luminous in high-energy X-rays, it must host a supermassive black hole much larger and more powerful than expected.

"This is a completely unique system and runs contrary to what we understand of galaxy mergers," said Nathan Secrest, lead author of the study and postdoctoral fellow at the U.S. Naval Research Laboratory in Washington.

Data from NuSTAR and the Sloan Digital Sky Survey suggest that the mass of the dwarf galaxy's black hole is huge, compared to similarly sized galaxies, at more than 2 percent of the galaxy's own mass.

"We didn't think that dwarf galaxies hosted supermassive black holes this big," Secrest said. "This black hole could be hundreds of times more massive than what we would expect for a galaxy of this size, depending on how the galaxy evolved in relation to other galaxies."

The dwarf galaxy's black hole is the engine of an active galactic nucleus (AGN), a cosmic phenomenon in which extremely high-energy radiation bursts forth as a black hole devours gas and dust. This particular AGN appears to be covered by a donut-shaped structure made of gas and dust. NASA's Chandra and Swift missions were used to further characterize the X-ray emission.

Normally, when two galaxies start to merge, the larger galaxy's central black hole becomes active, voraciously gobbling gas and dust, and spewing out high-energy X-rays as matter gets converted into energy. That is because, as galaxies approach each other, their gravitational interactions create a torque that funnels gas into the larger galaxy's central black hole. But in this case, the smaller galaxy hosts a more luminous AGN with a more active supermassive black hole, and the larger galaxy's central black hole is relatively quiet.

An optical image of the Was 49 system, compiled using observations from the Discovery Channel Telescope in Happy Jack, Arizona, uses the same color filters as the Sloan Digital Sky Survey. Since Was 49 is so far away, these colors are optimized to separate highly-ionized gas emission, such as the pink-colored region around the feeding supermassive black hole, from normal starlight, shown in green. This allowed astronomers to more accurately determine the size of the dwarf galaxy that hosts the supermassive black hole.

The pink-colored emission stands out in a new image because of the intense ionizing radiation emanating from the powerful AGN. Buried within this region of intense ionization is a faint collection of stars, believed to be part of the galaxy surrounding the enormous black hole. These striking features lie on the outskirts of the much larger spiral galaxy Was 49a, which appears greenish in the image due to the distance to the galaxy and the optical filters used.

Scientists are still trying to figure out why the supermassive black hole of dwarf galaxy Was 49b is so big. It may have already been large before the merger began, or it may have grown during the very early phase of the merger.

"This study is important because it may give new insight into how supermassive black holes form and grow in such systems," Secrest said. "By examining systems like this, we may find clues as to how our own galaxy's supermassive black hole formed."

In several hundred million years, the black holes of the large and small galaxies will merge into one enormous beast.

NuSTAR is a Small Explorer mission led by Caltech and managed by JPL for NASA's Science Mission Directorate in Washington. NuSTAR was developed in partnership with the Danish Technical University and the Italian Space Agency (ASI). The spacecraft was built by Orbital Sciences Corp., Dulles, Virginia. NuSTAR's mission operations center is at UC Berkeley, and the official data archive is at NASA's High Energy Astrophysics Science Archive Research Center. ASI provides the mission's ground station and a mirror archive. JPL is managed by Caltech for NASA.

For more information on NuSTAR, visit:

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