Buzz Aldrin calls for a migration to Mars

first_img Another Mars rover bites the dust, but NASA’s not finished… 2 Now playing: Watch this: Buzz Aldrin wants us to go to Mars. Emma McIntyre/Getty For Buzz Aldrin, the moon is no longer enough. Aldrin, who, along with Neil Armstrong, walked on the moon during the landmark Apollo 11 mission 50 years ago, penned an op-ed in the Washington Post Wednesday, calling on Congress and President Donald Trump to get behind a serious effort to create a permanent human presence on Mars. “Human nature — and potentially the ultimate survival of our species — demands humanity’s continued outward reach into the universe,” Aldrin wrote.He’s not talking about “clever robots” or rovers, either. Aldrin said that as much as he appreciates NASA’s work on unmanned missions, it’s time Mars is explored by “by living, breathing, walking, talking, caring and daring men and women.”Plans for sending humans to Mars are on the drawing board at NASA and in the mind of entrepreneur Elon Musk. Although details are sketchy for now, NASA and the Trump administration have penciled in 2033 for when astronauts might make the first footprints on the red planet. Meanwhile, Musk sees a Mars base happening perhaps by 2028, and he has a vision for how a Mars colony could take shape.Aldrin thinks we need to establish permanent settlements on Mars, and fairly soon.”All of this is within reach for humans alive now, but it starts with a unified next step in space,” he wrote. Share your voice Tags Comments 6:31 Sci-Techlast_img read more

CEA Arvind Subramanium Asks RBI to Cut Rate to Spur Investment Drive

first_imgChief Economic Advisor (CEA) Arvind Subramanian has called for a rate cut that would boost investments to achieve the potential growth rate of 7-8%.Explaining the decline in inflation statistics, Subramanian stressed the need for the central bank to cut interest rates even before their next meeting scheduled for February 3, 2015.RBI Governor Raghuram Rajan has repeatedly said that a rate cut would be in avail, if the fight against inflation continues to produce expected results. ReutersThe CEA noted that the private sector is saddled with high debt and therefore it is imperative to public investment to help shore up business climate in India.To keep inflation under control, the RBI has held rates at 8% since the year began. The wholesale price index declined to a five-and-a-half-year low of zero percentage a week ago.The second-quarter GDP growth for Asia’s third largest economy has slowed down to ₹14.39 lakh crore, or 5.3% year-on-year. The first-quarter witnessed 5.7%, signalling revival.Subramanium added it would be a challenge to restrict the fiscal deficit to 4.1%. He hinted at an expenditure cut in the range of ₹60,000 to ₹80,000 crore to keep the deficit under control, reports Livemint.The CEA expects India to post a growth rate of 5.5% in the current fiscal year, up from 4.7% last year, on the back of inflation control and better current account deficit management.last_img read more

Snapdeals FY16 losses increase twofold to Rs 2960 crore

first_imgSnapdeal, a local e-commerce firm’s losses have more than doubled to Rs 2,960 crore for the financial year that ended in March 2016, when compared to Rs 1,319 crore in the previous year. One of the many reasons for the losses is the continuously eroding market share to local rival Flipkart and US-based e-commerce firm Amazon. During the same period, the New Delhi-based online marketplace reported 50 percent rise in revenues to Rs 1,456 crore. It had reported losses to the tune of Rs 1,319.2 crore on revenues of Rs 933 crore in the previous fiscal (FY15), Mint cited documents filed with the registrar of companies as saying.Also read: Snapdeal to change logo, tagline ahead of Diwali sales”In order to deliver the best in class customer experience and to set up necessary infrastructure for future growth, there was an increase in fulfilment and overhead expenses,” the company said. Snapdeal fell to the number three slot in ranking as Amazon India continued to gain market share. Although Snapdeal has said it aims to focus on profitability and not market share, the e-commerce firm underwent a branding overhaul and had launched a new logo two months ago. It had committed close to Rs 200 crore on advertising and market spending in September and October last year, Times of India reported. “In FY2016 we invested our capital in building our capabilities across technology, logistics and seller ecosystem to support the long term growth of our business,” the publication quoted the company as saying. Japan’s SoftBank is one of the largest shareholders in Snapdeal, holding a 33 percent stake in the company. Some of the other investors include Kalaari Capital, Nexus Venture Partners, E-Bay, Foxconn and Alibaba Group Holding Ltd. The news of Snapdeal reporting losses comes at a time when its rivals Amazon India and Flipkart have stepped up on investments. Flipkart has invested $2 million (about Rs 13.6 crore) in a parenting social media platform called Tinystep on Thursday, Press Trust of India reported.last_img read more

Protests as Trump visits site of antiSemitic attack

first_imgPeople protesting against US President Donald Trump gather near the Tree of Life Congregation on 30 October in Pittsburgh, Pennsylvania. Photo: AFPUS president Donald Trump visited Tuesday the Pittsburgh synagogue where 11 people were gunned down at the weekend in an anti-Semitic attack, as more than 1,500 protesters gathered nearby to make it clear the US president was unwelcome.Carrying signs that read “President Hate, Leave Our State!” and “Trump, Renounce White Nationalism Now,” the protesters gathered near the Tree of Life synagogue where the carnage unfolded Saturday.Trump — accompanied by his wife Melania, arrived in the late afternoon, and placed a white flower and a small stone on each star erected in memory of the dead at a makeshift memorial outside the Tree of Life.Trump’s daughter Ivanka and her husband Jared Kushner, who are Jewish, followed at a short distance, also pausing at each star.The first couple then entered the synagogue and lit candles in honour of each of those killed, the occasion punctuated by the still audible cries of protesters outside.The controversial visit came after mourners crowded into nearby synagogues and joined street processions at the first funerals for some of the victims of the deadliest anti-Semitic attack in modern US history.The service for brothers Cecil and David Rosenthal, both in their 50s, was the first in honor of those killed in what was an apparent hate crime.Services for 66-year-old doctor Jerry Rabinowitz and 71-year-old Daniel Stein followed in Pittsburgh, where scores of residents protested Trump’s visit.The president’s trip to Pennsylvania came amid a mounting row over whether his fierce rhetoric at campaign rallies and on Twitter has helped stoke extremism ahead of next week’s midterm elections.”It’s just enraging that this type of hate crime could occur here and that the leadership of our country does not denounce anti-Semitism and does not denounce white nationalism and does not denounce neo-Nazism,” mourner Joanna Izenson told AFP.Suspect Robert Bowers is facing more than two dozen charges related to the bloodshed at the Tree of Life, which is located in the city’s traditionally Jewish Squirrel Hill neighbourhood.The 46-six-year-old reportedly told police after his capture, “I just want to kill Jews,” having claimed on social media that Jews were helping transport caravans of refugees from Central America into the United States, calling the migrants “invaders.”The caravans are a favourite target of the president, and he has called a group of several thousand impoverished mainly Honduran migrants currently attempting to walk north to the United States “an invasion.”Beautiful tributeFriends and strangers alike packed the Rodef Shalom temple, a 25-minute walk from the Tree of Life, for the Rosenthals’ funeral, which took place under tight security.After the service, mourners spilled out onto the street, some of them sobbing and clasping each other.The brothers’ caskets were placed in two hearses and driven away, with a sheriff’s car leading the procession.”It was tragic, it was sad — it was a beautiful tribute to two wonderful, loving, innocent men,” said Paul Taylor, a Catholic priest who attended the service, which he said was “standing room only.”Another mourner, a retired teacher who only gave her first name Nancy, said: “I was finally able to cry.”Nearby, dozens of mourners walked behind the hearse carrying the remains of Rabinowitz in Squirrel Hill, according to footage posted on social media.Meanwhile, protesters gathered near the Tree of Life synagogue to vent their anger.”President Trump, you are not welcome in Pittsburgh until you fully renounce white nationalism.”Jeffrey Myers, a rabbi who was present when the attack started, told CNN: “The president of the United States is always welcome.”But protesters disagreed.”I think it’s more divisive than uniting,” 57-year-old librarian Nonie Heystek said of Trump’s visit.Christian rabbiThe Pittsburgh shooting spree came in the same week that authorities arrested an ardent Trump supporter from Florida on suspicion of mailing more than a dozen homemade bombs to opponents and critics of the president.The incidents have led to accusations that Trump has fanned violence through almost daily tweets and speeches lambasting illegal immigrants, political opponents and journalists in divisive language.Trump has struck back in typical fashion, arguing that critical journalists were in fact the ones feeding extremism across the country.Trump’s Pittsburgh visit is not the only element of the administration’s response to the massacre that has been a source of controversy.On Monday, vice president Mike Pence attended a campaign rally in Michigan at which a so-called “Christian rabbi” was invited to speak on behalf of the area’s Jewish community.Instead of opening with prayers for the 11 victims of the Tree of Life shooting, Loren Jacobs praised Jesus Christ and then offered prayers for four Republican candidates.Jews expressed outrage over social media, describing Jacobs’ appearance as an “insulting political stunt” and blasting Pence as a “Christian supremacist.”last_img read more

Researchers build two versions of new most accurate clock ever

first_img © 2013 Phys.org Explore further (A) Laser light at 578 nm is pre-stabilized to an isolated, high-finesse optical cavity using Pound-Drever-Hall detection and employing electronic feedback to an acousto-optic modulator (AOM) and laser piezoelectric-transducer. This stable laser light is then delivered to the Yb-1 and Yb-2 systems, where it is aligned along the optical lattice axis to probe the atomic clock transition. Resonance with the atomic transition is detected by observing atomic fluorescence collected onto a photomultiplier tube (PMT). The fluorescence signal is digitized and processed by a microcontroller unit (MCU), which computes a correction frequency, f1;2(t). This correction frequency is applied to the relevant AOM by way of a direct digital synthesizer (DDS), and locks the laser frequency onto resonance with the clock transition. (B) Relevant Yb atomic energy levels and transitions, including laser cooling transitions (399 and 556 nm), the clock transition (578 nm), and the optical pumping transition used for excited state detection (1388 nm). (C) A single-scan, normalized excitation spectrum of the 1S0- 3P0 clock transition in 171Yb with 140 ms Rabi spectroscopy time; the red line is a free-parameter sinc2 function fit. Credit: arXiv:1305.5869 [physics.atom-ph] Citation: Researchers build two versions of new most accurate clock ever (2013, May 30) retrieved 18 August 2019 from https://phys.org/news/2013-05-versions-accurate-clock.html (Phys.org) —Researchers at the National Institute of Standards and Technology in Boulder Colorado have succeeded in building a record breaking clock—one that has an instability of just one part in 10-18. They describe their new clock in a paper they’ve uploaded to the preprint server arXiv. In it they suggest that if their clock could somehow be used to gauge the age of the universe, it would be able to do so within just a single second. More information: An atomic clock with $10^{-18}$ instability, arXiv:1305.5869 [physics.atom-ph] arxiv.org/abs/1305.5869AbstractAtomic clocks have been transformational in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation. Next-generation optical atomic clocks can extend the capability of these timekeepers, where researchers have long aspired toward measurement precision at 1 part in $bm{10^{18}}$. This milestone will enable a second revolution of new timing applications such as relativistic geodesy, enhanced Earth- and space-based navigation and telescopy, and new tests on physics beyond the Standard Model. Here, we describe the development and operation of two optical lattice clocks, both utilizing spin-polarized, ultracold atomic ytterbium. A measurement comparing these systems demonstrates an unprecedented atomic clock instability of $bm{1.6times 10^{-18}}$ after only $bm{7}$ hours of averaging.via Arxiv Blogcenter_img Journal information: arXiv As time has passed, clock-making has become more important—besides helping people get together at prearranged times, clocks now help run the GPS system, keep networks on track and are key to unlocking the fundamental laws of the universe. As technology has grown in sophistication, so too has the need for ever more accurate clocks. This has led to atomic clocks which use the electronic transition frequency in the ultraviolet, optical or microwave region of the electromagnetic spectrum to keep very accurate time. In this new effort, the researchers built a new type of atomic clock that is more accurate than any that has come before.To build their clock the researchers employed a laser and mirrors to build a lattice trap capable of capturing atoms—its purpose was to hold atoms steady so that there wouldn’t be any frequency interference, a problem with other atomic clocks. The trap was then filled with ytterbium atoms which were then shot with a second laser to measure their electronic frequencies. The result was a clock that if allowed, would be off by less than a second if run for 31 billion years.Building a clock that is believed to be the most accurate in the world creates a problem though, how to accurately measure its accuracy? The answer is by building another clock exactly like the first of course and then comparing the two against one another. That’s what the researchers did, running both clocks for a short period to see if they came up with exactly the same time duration, which the researchers report, they did.One of the first uses for the new clock will be in measuring gravitational redshift, which is a means of measuring very precisely, the height of geographic areas. This can be done because time moves slower in areas of higher gravity. The researchers say their new clock is capable of measuring redshit to within 1 centimeter. Physicists propose a way to make atomic clocks more accurate This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more