dijous, 31 de gener del 2019

NASA and China collaborate on Moon exploration

Observations gathered from the collaboration could help future missions to the Moon
The space agencies of the United States and China are coordinating efforts on Moon exploration, NASA said Friday, as it navigates a strict legal framework aimed at protecting national security and preventing technology transfer to China.
"With the required approval from Congress, NASA has been in discussions with China to explore the possibility of observing a signature of the landing plume of their lunar lander, Chang'e 4, using our @NASAMoon spacecraft's instrument," NASA's associate administrator for the science mission directorate, Thomas Zurbuchen, wrote on Twitter.
Zurbuchen's tweet confirmed a similar statement made Monday by the deputy chief commander of China Lunar Exploration Program, Wu Yanhua. 
Thomas Zurbuchen

NASA shared information from a US satellite while China told the Americans about the latitude, longitude and time of the landing "in a timely manner," he said.
The hope was that NASA's Lunar Reconnaissance Orbiter (LRO) could observe the historic touchdown of the Chinese lander on January 3.
NASA provided the planned orbit path of LRO to China, but it turned out the spacecraft was not in the right place at the right time.
"For a number of reasons, NASA was not able to phase LRO's orbit to be at the optimal location during the landing, however NASA was still interested in possibly detecting the plume well after the landing," the agency said in a statement.
"Science gathered about how lunar dust is ejected upwards during a spacecraft's landing could inform future missions and how they arrive on the lunar surface."
Such observations could help astronauts prepare for future missions to the Moon.
NASA's lunar orbiter will pass over the Chang'e 4 landing site on January 31 and will snap pictures, as it did for the Chang'e 3 in 2013.
The agency said significant findings resulting from the cooperation would be shared with the global research community in February at a United Nations space gathering in Austria. 
Wu Weiren, Queqiao,

Risk of 'technology transfer' 
Since 2011, the US Congress has barred NASA or the White House Office of Science and Technology Policy from using federal funds "to develop, design, plan, promulgate, implement or execute a bilateral policy, program, order, or contract of any kind to participate, collaborate, or coordinate bilaterally in any way with China or any Chinese-owned company."
Exceptions are possible, but NASA must convince Congress and the FBI that the activity would "pose no risk of resulting in the transfer of technology, data, or other information with national security or economic security implications to China or a Chinese-owned company."
The clause was inserted in a US spending bill after a wave of cyber-attacks that was traced to sources in China.
NASA said in its Friday statement that "all NASA data associated with this activity are publicly available," and that NASA's cooperation with China "is transparent, reciprocal and mutually beneficial."
Sino-US cooperation could extend beyond the current lunar project, according to Wu Weiren, chief designer of China's Lunar Exploration Program.
In an interview broadcast by state television CCTV on Sunday, he said NASA scientists had discussed a possible collaboration at an international conference "a few years ago," and that US scientists had asked to extend the lifespan of China's Queqiao relay satellite from three to five years to facilitate the planning of an American moon mission.
Henry Hertzfeld,

And why?
"Later, they said, feeling somewhat embarrassed, that they wanted to land on the far side of the moon too, so if we let (our relay satellite) operate longer they can also use it," he said.
The satellite in question aids in communications with a lander on the far side of the Moon.
NASA scientists had also discussed possibly placing a beacon on the Chang'e 4 probe, he added.
"If we put a beacon there, they also know where to land. I told them our Chang'e 4 can be used as a beacon for you in future," Wu said.
However the US restrictions "might be a much higher barrier to overcome" in ambitious cooperation projects such as a lunar research base that "might involve sharing of technological information," said Henry Hertzfeld, director of the Space Policy Institute at George Washington University.

dimecres, 30 de gener del 2019

Electric car maker Tesla to cut workforce by 7%

Tesla CEO Elon Musk has warned of a difficult road ahead

Tesla is to cut its workforce by about 7% after a difficult year for the electric car maker.
“The road ahead is very difficult,” the company’s founder and CEO Elon Musk said in an email to employees.
He said Tesla hopes to post a “tiny profit” in the current quarter but that after expanding its workforce by 30% last year, it cannot support that size of staff.
Mr Musk said in October that Tesla had 45,000 employees.
A 7% cut would involve laying off about 3,150 people.
Tesla’s shares tumbled earlier this month after it cut vehicle prices by 2,000 dollars and announced fourth-quarter sales figures that fell short of Wall Street estimates.
“Our products are too expensive for most people,” Mr Musk said in the memo to Tesla staff saying the company has to “work harder”.
“Tesla has only been producing cars for about a decade and we’re up against massive, entrenched competitors,” he said.


The company says it delivered over 245,000 electric cars and SUVs last year, nearly as many as all previous years combined.
But its 2018 production fell far short of a goal set nearly three years ago of manufacturing 500,000 vehicles for the year.
That goal was announced in May of 2016 based on advance orders for its mid-range Model 3, which sells for 44,000 dollars.
Mr Musk said Tesla plans to ramp up production of the Model 3, “as we need to reach more customers who can afford our vehicles”.
“Attempting to build affordable clean energy products at scale necessarily requires extreme effort and relentless creativity,” he said in the memo. “But succeeding in our mission is essential to ensure that the future is good, so we must do everything we can to advance the cause.”

dimarts, 29 de gener del 2019

Holocaust Memorial : Jewish woman recalls the day she gave Hitler flowers before escaping Nazi Germany

Women and children, some ill to the point of death, are crowded into one filthy hut in the Nazi Concentration camp at Belsen, where Nazi Brutality outdid itself in treatment of the prisoners. British troops, capturing the camp, found 60,000 people, mostly Jews, dead or dying of starvation and ill treatment.

Hanna Oppenheim’s parents would have kept her at home if they had known she would spend the day surrounded by Adolf Hitler and his SA Brownshirts.
Her teacher would also have been highly unlikely to choose the nine-year-old girl to present the Nazi leader with a gargantuan bouquet of flowers in front of a piazza full of people in Munich.
“I do not think my teacher would have chosen me because she would have been aware of the fact I was Jewish and she would not have wanted to expose me,” the 94-year-old tells

“My classmates chose me. I remember being very pleased to be picked. It seemed a tremendous honour. It never occurred to me that I ought not to present the flowers.”
It was 9 November 1933 and my grandma, who was forced to leave Hitler’s Germany soon after the flower saga, was about nine and a half.
“Hitler had been in power for 11 months and he had decided to return to Munich – the home of the Nazi movement – for a special ceremony to commemorate the 10th anniversary of 1923 [the Munich Putsch].”
All of the state elementary schools in Munich had gathered at Feldherrnhalle – a building that is still standing to this very day.
“The piazza was full of kids and I remember being pushed forward by the crowds,” the nonagenarian, who was known as Hannelore back then, says. “As a little girl, the bouquet of flowers felt far bigger than me. I remember walking up the steps in front of a massive crowd, feeling a strange combination of terror and excitement.
A one million mark note alongside an essay about Hitler
“Of course he didn’t know I was Jewish, nobody in the crowd did apart from my teacher and the other children. I distinctly remember a soldier on the left of Hitler taking the bouquet off me. All this time, the Fuhrer just stood there and didn’t shake my hand. I remember a stern face and uniform. I then stepped back into the warmth of my classmates.”
Her parents were more than a little surprised when she got home and they asked about her day. After all, they had already started making preparations to leave Germany.
“They were very taken aback, to say the least, it was a total shock to them,” she says. “By this time, they knew we were leaving Germany and they were closing down the business, preparing their various documents and saying their goodbyes. My parents had noticed lots of changes since Hitler’s rise to power. Having read Mein Kampf, they were fully aware of Hitler’s intentions.”
Otto Frank, her father, was a timber merchant and he had noticed trade getting steadily worse since the Nazi Party’s rise to power.
“His orders became few and far between, as applications for building contracts were rejected from companies he had done business with for years,” she tells me. “My father also noticed that business letters were not signed as in the old days – ‘yours faithfully’ but as ‘mit deutschem Gruß [with German greeting], Heil Hitler’.”


Dr Max Meyer, her uncle, had been writing the family weekly letters from Jerusalem where he had already emigrated. The letters warned the family to get out of the country.
“At the time, Max was regarded as a terrible pessimist, like a prophet who prophesises the end of the world,” she says. “While my father was probably not as much of a pessimist, he was also a great realist and could also see that it was time to leave. Although it was still only the beginning.”
But she herself remained oblivious to what was happening to the country and had no idea she would soon be leaving or that the Nazi Party would go on to mass-murder six million Jews. She was too young to read the daily paper her parents had delivered to the flat and did not listen to the radio. Her parents also chose not to discuss the political situation in front of her.
“There was a feeling that if I’d heard it was a vile system at home, I might have felt resentful or rebellious in school,” she says. “So while they prepared their exit, I continued to read Hans Christian Anderson and Grimm’s Fairy Tales, none the wiser.”
Her only encounters with Hitler came through school and in the form of indoctrination. There was a pro-Hitler brainwashing session once a week called Heimatkunde (“Study of Your Home Country”) and she still has an exercise book which contains evidence of it.
Stanisława Leszczyńska, a Polish midwife who was imprisoned at the Auschwitz concentration camp, delivered around 3,000 babies during the Holocaust.

The notebook is replete with stuck-in pictures of Hitler and his stormtroopers and sketches she did of German flags, eagles and even swastikas. An essay inside the book talks about the huge cost of reparations that had to be paid after the First World War and issues of inflation and vast unemployment. “Out of this dreadful crisis, one man will liberate us – Adolf Hitler”, it concludes.
“At the end of the war, Adolf Hitler returned to Munich,” it continues. “He said: ‘I want a decent government, I want every German to be able to work: out of farmers, city dwellers, labourers we will make a German people. Germany needs to be powerful again’.”
“I thought, I’m just doing my school work. Hitler’s greatness was instilled in us,” she says.
But Ms Oppenheim does remember one day at school called the Hitler Feier (celebration) that her parents did not allow her to go to. She says she remembers a small boy who she walked to school with every day coming to fetch her but her not being allowed to go with him.
“He rang the bell as usual,” she recalls. ”I went down and I said ‘I’m not coming today’ and he said ‘why?’ and I said ‘because I’m Jewish’. I do remember the ensuing silence. He said, ‘well, it’s not your fault that you are Jewish’. The following day he came to pick me up. He was a nice boy.”
Dachau Nazi Prison Camp.

Soon after the day of the flowers, at the beginning of December 1933, her mother took her out of school. There was an epidemic of measles and she didn’t want her to get ill because they were due to leave at the beginning of January.
“I spent a lot of that month ice-skating and I had the whole lake to myself because all the other kids were at school,” she recalls. “One day on the way back from the ice rink, I ran into some children, who asked why I hadn’t been at school. They told me that the teacher, Frau Gruber, had left my drawing up on the blackboard, choosing not to wipe it off because I was leaving.
“I’m not sure how I passed a whole month with no school but I don’t think I was lonely, I had several friends. Although there was one particular girl who was no longer allowed to play with me. Her name was Inge and we lived in the same block, she was very pretty with blue eyes and blonde hair that was plaited on the top of her head. After Inge joined the League of German Girls and her brothers became part of Hitler Youth, she no longer came to play with me.”
Meanwhile, her parents packed up their possessions and removal men came to put the belongings in containers to travel by ship. To say their goodbyes, her parents threw a huge party with all of their friends, Jews and Germans alike. Before long, she was boarding a train and travelling east out of Germany.
“The minute we crossed the German border my father sat me down on his knee,” she says. “He explained why we were going to Jerusalem. He said Germany was no longer safe and Jews would no longer be able to lead a normal life. Despite the fact that we had lived in Germany for generations, he said we had to leave while we still could. As a young girl, it was only then that I grasped all of the things which had been hidden from me.”
A Nazi concentration camp in Dachau
They took the train through the Balkan countries, passing through Yugoslavia, Bulgaria, Turkey and Greece before getting a boat from Athens to Jaffa and finally arriving in Jerusalem.
“Days after we moved in, I started school and within weeks I could speak Hebrew fluently,” she says. “I made friends quickly and settled into the Mediterranean climate. From then on, a totally different life began.
“When the war broke out, I was 15 and old enough to realise how bad the situation was. Things had been getting progressively uglier since the day I met Hitler. People had disappeared and been dragged into camps. All the things my father had thought would happen, happened. But they were infinitely worse than anybody could have imagined, with thousands and millions of people being gassed.”
From Jerusalem, they followed the news closely. “We had Jewish friends and relatives in Germany and learned that the Oppenheimer side of the family had been taken to Bergen-Belsen,” she remembers. “The parents, the three children and two sets of grandparents were all taken away. In the end, the parents and two sets of grandparents died and the three children survived, Eve, Rutzi and Paul. You feel sad about the ones you knew and the millions you did not know.”

dilluns, 28 de gener del 2019

'Whisper' laser tech sends audible messages to specific people

Researchers from MIT have discovered a way to send highly targeted audio signals directly to someone's ear at a distance using laser beams. The system works using the "photoacoustic" effect, where water vapor in the air absorbs light, forming sound waves. The research may pave the way to systems that allow audible messages to be transmitted to spies or other agents, warning them of impending danger like an active shooter.
The team started with a laser beam that fired at wavelengths absorbed by water. By sweeping the beam at the speed of sound, they found that it could be used to generate sound that can only be heard at a specific distance from the transmitter. That would allow a message to be sent to an individual, rather than just anyone who crossed the path of the laser.
"This can work even in relatively dry conditions because there is almost always a little water in the air, especially around people," said research lead Charles M. Wynn. And if you're thinking that a laser at head level sounds like a bad idea, apparently it's fine. "It is the first system that uses lasers that are fully safe for the eyes and skin to localize an audible signal to a particular person in any setting," added Wynn.
The scientists also found a method that works by modulating, rather than sweeping, the beam. "There are tradeoffs between the two techniques," said researcher Ryan M. Sullenberger. "The traditional [modulation] method provides sound with higher fidelity, whereas the laser sweeping provides sound with louder audio." The system currently works at more than 2.5 meters (8 feet), so for the next step, the scientists plan to scale it up to longer distances. After that, "We hope that eventually a commercial technology will develop," Sullenberger said.

In pictures: Russia marks end of Leningrad WW2 siege

Ceremonies have taken place in St Petersburg to mark the 75th anniversary of the end of the deadly World War Two siege of Leningrad, as the Russian city was then known.
Honour guards began a military parade, carrying the banners of the Soviet Fronts that fought for the city against Nazi Germany

Modern tanks rolled through the heart of St Petersburg - Russia's second-largest city and a former capital

Famed WW2-era T-34 battle tanks also participated in the ceremonies

As well as soldiers dressed in WW2 Soviet uniforms

Military jets made an overfly over the northern city

The siege lasted 872 days - from 8 September 1941 to 27 January 1944

Earlier, Russians laid flowers to the victims of the siege. About 800,000 people died during the two-and-a-half-year blockade

diumenge, 27 de gener del 2019

The players to watch out for in the Six Nations

































L'atac nord-americà de Doolittle contra el Japó va canviar el corrent de la Segona Guerra Mundial

Fa 80 anys: el Doolittle Raid va marcar el dia que sabíem que podríem guanyar la Segona Guerra Mundial. Com a patriòtic nord-americà, durant...