St Antony’s student reverses decision to drop out in support of Gilbert Mitullah’s campaign

first_imgA St Antony’s College student who decided to drop out of Oxford in order to help finance the education of Kenyan masters student Gilbert Mitullah has now reversed their decision.Layo London threatened to commit “academic suicide” on Thursday, pledging to donate the money that would have been spent on her Trinity term Art History MA fees to Mitullah’s campaign. But now Mitullah is £4,000 away from his fundraising target, London has said “it is likely that I will stay on at Oxford.”In a video posted on YouTube, she said she felt she has the freedom to reapply to university and wanted to “test the limits of my privilege” by leaving to support Mitullah. She urged people “not to blame Gilbert. He is a lovely individual, I am committed to fighting this because it’s so much bigger than him”.Commenting on London’s decision, Mitullah told Cherwell: “I have mixed feelings about it. It’s ironic that she is the only African student in her masters course, leaving so that the first and only Kenyan in his course would stay, there are no winners here. Actually, the University and both of us lose. So I am not happy about it, I have urged her to stay and complete her studies because there is a greater benefit for us, but I cannot compel her to make any decisions. I am still wrapping my head around it all, but I know it leaves a bitter taste in my mouth.”After Visa complications, Mitullah’s funding was withdrawn. Since the start of a campaign to crowdfund the £25,000 required to continue his masters degree, Mitullah has attracted the support of a variety of groups including Rhodes Must Fall and the Oxford University Africa Society, and the Oxford and Cambridge Society of Kenya.Support comes in part because of his work as a legal aid lawyer and education innovator, becoming a member of the World Economic Forum Global Shapers Community.To date Mitullah has managed to pay £13,800 of the £25,000 needed to stay. He will be meeting with the warden of St Anthony’s College in order to request an extension.But in regards to his College, Mitullah told Cherwell: “My department has been very supportive and helpful, especially my supervisor. But my College has offered little support if any, I felt attacked and harassed by the people supposed to be safeguarding my welfare.“We need more BME Junior Deans, people with the power to assist BME students and greater access and funding for students from Sub Saharan Africa. An officer should be assigned to colleges to help students in financial distress to fundraise. What Layo had done in a week could have been done easier and earlier with College support.”Layo London and Oxford University have been contacted for comment.last_img read more

Russia to decide on appeal against doping ban

first_imgLast Updated: 19th December, 2019 10:42 IST Russia To Decide On Appeal Against Doping Ban Russia’s anti-doping agency will on Thursday decide whether to launch an appeal against a four-year ban from major sporting events over systematic violations READ | UFC: Max Holloway’s Classy Post For Alexander Volkanovski Despite Loss Wins Fans Over’Inefficient and useless’The expected confirmation of an appeal will coincide with the annual marathon press conference of Putin, also on Thursday afternoon, where the president is set to again take a position on the issue. The director-general of RUSADA, Yuri Ganus, who has long argued for a major crackdown by Russia against doping cheats, said he expected the supervisory board to appeal but strongly opposed the move. “The board will decide to appeal,” he told AFP. “I believe this to be inefficient and useless.” READ |Aravindh Sole Leader In National Senior Chess ChampionshipGanus, whose rigorous stance puts him at odds with his own government and supervisory board, argues that Moscow needs to accept the sanctions and own up to its faults in order to be able to reform. The suspension was handed to Russia over falsifying data from a doping testing laboratory that was handed to WADA earlier this year as part of the compliance reinstatement process. The significant extent of state-sponsored doping in Russia, notably between 2011 and 2015, was revealed in the independent report by sports lawyer Richard McLaren, released in 2016.The issue has dealt a colossal blow to the status of post-Soviet Russia as a major sports power after hosting events such as the 2013 World Athletics Championships, the 2018 World Cup and the 2014 Winter Olympics in Sochi. The Sochi Games later became notorious for the number of doping violations by prominent Russian athletes. The situation has also divided Russian sports stars, with three-time world champion high jumper Mariya Lasitskene calling on sports officials to be held to account over the ban. READ | Gerrit Cole Breaks Silence On Why He Joined New York Yankees Press Trust Of India COMMENT LIVE TV SUBSCRIBE TO US First Published: 19th December, 2019 10:42 ISTcenter_img Written By WATCH US LIVE Russia’s anti-doping agency will on Thursday decide whether to launch an appeal against a four-year ban from major sporting events over systematic violations, a prohibition denounced by the country’s leadership as politically motivated. The supervisory board of RUSADA will hold a meeting and is widely expected to announce its formal rejection of the December 9 decision by WADA to ban Russia for non-compliance. This formal disagreement with WADA would trigger the process of appeal against the ban at the Lausanne-based Court of Arbitration for Sport.READ | Sanjeev, Rahi, Manu, Aishwary On A Roll At Rifle & Pistol NationalsRUSADA supervisory board chairman Alexander Ivlev is due to announce the decision at 1000 GMT. The World Anti-Doping Agency (WADA) on December 10 banned Russia for four years from major global sporting events, including the 2020 Tokyo Olympics and the 2022 World Cup in Qatar, over manipulated doping data. Under the sanctions, Russians will still be allowed to compete at the Olympics next year and the 2022 Beijing Winter Olympics, but only as neutrals and if they can demonstrate that they were not part of what WADA believes was a state-sponsored system of doping. Russian President Vladimir Putin slammed the ban as a “politically motivated” ruling that “contradicted” the Olympic Charter. Prime Minister Dmitry Medvedev lamented it was “the continuation of this anti-Russian hysteria that has already become chronic.”  FOLLOW USlast_img read more

Physicists predict a way to squeeze light from the vacuum of empty

first_img Click to view the privacy policy. Required fields are indicated by an asterisk (*) Physicists predict a way to squeeze light from the vacuum of empty space Sign up for our daily newsletter Get more great content like this delivered right to you! Country Email Country * Afghanistan Aland Islands Albania Algeria Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Cote d’Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hungary Iceland India Indonesia Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea, Democratic People’s Republic of Korea, Republic of Kuwait Kyrgyzstan Lao People’s Democratic Republic Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao Macedonia, the former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Martinique Mauritania Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Norway Oman Pakistan Palestine Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Qatar Reunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Vietnam Virgin Islands, British Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe By Adrian ChoMar. 29, 2019 , 12:55 PMcenter_img However, it should be possible to ditch the material and produce Cherenkov light straight from the vacuum, predict Dino Jaroszynski, a physicist at the University of Strathclyde in Glasgow, U.K., and colleagues. The trick is to shoot the particles through an extremely intense electromagnetic field instead.According to quantum theory, the vacuum roils with particle-antiparticle pairs flitting in and out of existence too quickly to observe directly. The application of a strong electromagnetic field can polarize those pairs, however, pushing positive and negative particles in opposite directions. Passing photons then interact with the not-quite-there pairs so that the polarized vacuum acts a bit like a transparent medium in which light travels slightly slower than in an ordinary vacuum, Jaroszynski and colleagues calculate.Putting two and two together, an energetic charged particle passing through a sufficiently strong electromagnetic field should produce Cherenkov radiation, the team reports in a paper in press at Physical Review Letters. Others had suggested vacuum Cherenkov radiation should exist in certain situations, but the new work takes a more fundamental and all-encompassing approach, says Adam Noble, a physicist at Strathclyde.Spotting vacuum Cherenkov radiation would be tough. First, the polarized vacuum slows light by a tiny amount. The electromagnetic fields in the strongest pulses of laser light reduce light’s speed by about a millionth of a percent, Noble estimates. In comparison, water reduces light’s speed by 25%. Second, charged particles in an electromagnetic field spiral and emit another kind of light called synchroton radiation that, in most circumstances, should swamp the Cherenkov radiation.Still, in principle, it should be possible to produce vacuum Cherenkov radiation by firing high-energy electrons or protons through overlapping pulses from the world’s highest intensity lasers, which can pack a petawatt, or 1015 watts, of power. However, Jaroszynski and colleagues calculate that in such fields, even particles from the world’s highest energy accelerators would produce much more synchrotron radiation than Cherenkov radiation.Space could be another place to look for the effect. Extremely high energy protons passing through the intense magnetic field of a spinning neutron star—also known as a pulsar—should produce more Cherenkov radiation than synchrotron radiation, the researchers predict. However, pulsars don’t produce many high-energy protons, says Alice Harding, an astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and the particles that do enter a pulsar’s magnetic field should quickly lose energy and spiral instead of zipping across it. “I’m not terribly excited about the prospect for pulsars,” she says.Nevertheless, King says, experimenters might see the effect someday. Physicists in Europe are building a trio of 10-petawatt lasers in Romania, Hungary, and the Czech Republic, and their counterparts in China are developing a 100-petawatt laser. Scientists are also trying to create compact laser-driven accelerators that might produce highly energetic particle beams far more cheaply. If those things come together, physicists might be able to spot vacuum Cherenkov radiation, King says.Others are devising different ways to use high-power lasers to probe the polarized vacuum. The ultimate aim of such work is to test quantum electrodynamics in new ways, King says. Experimenters have confirmed the theory’s predictions are accurate to within a few parts in a billion. But the theory has never been tested in the realm of extremely strong fields, King says, and such tests are now becoming possible. “The future of this field is quite exciting.” Argonne National Laboratory/Wikimedia commons (CC BY-SA 2.0) Talk about getting something for nothing. Physicists predict that just by shooting charged particles through an electromagnetic field, it should be possible to generate light from the empty vacuum. In principle, the effect could provide a new way to test the fundamental theory of electricity and magnetism, known as quantum electrodynamics, the most precise theory in all of science. In practice, spotting the effect would require lasers and particle accelerators far more powerful than any that exist now.“I’m quite confident about [the prediction] simply because it combines effects that we understand pretty well,” says Ben King, a laser particle physicist at the University of Plymouth in the United Kingdom, who was not involved in the new analysis. Still, he says, an experimental demonstration “is something for the future.”Physicists have long known that energetic charged particles can radiate light when they zip through a transparent medium such as water or a gas. In the medium, light travels slower than it does in empty space, allowing a particle such as an electron or proton to potentially fly faster than light. When that happens, the particle generates an electromagnetic shock wave, just as a supersonic jet creates a shock wave in air. But whereas the jet’s shock wave creates a sonic boom, the electromagnetic shock wave creates light called Cherenkov radiation. That effect causes the water in the cores of nuclear reactors to glow blue, and it’s been used to make particle detectors. Charged particles zipping through water in a nuclear reactor produce Cherenkov radiation.last_img read more