Northwestern State’s Ivanova Earns Women’s Tennis Player of the Week

first_imgHonorable Mention: Ceci Mercier, Southeastern Louisiana; Sarah Jurakova, McNeese; Jelana Dzinic, Texas A&M-Corpus Chrisi; Gabi Guilarte, Stephen F. Austin; Jelena Dordan, UIW. Women’s Tennis Player of the Week – Polina Ivanova, Northwestern State – Sr. – Moscow, Russia Ivanova did not surrender a set across her four matches in Southland singles and doubles competition this past weekend. She improved her singles record to 5-1 while remaining undefeated in doubles with junior Polina Mutel at 5-0. Ivanova and Mutel’s 6-2 doubles victory at the top slot in Saturday’s match against Southeastern helped the Lady Demons earn the 1-0 advantage heading into singles play. The senior from Moscow, Russia, gave up just one point across the two sets at the No. 2 flight, defeating the Lions’ Dany Raygadas 6-0, 6-1. On Sunday against New Orleans, the tandem of Ivanova and Mutel garnered every point to win 6-0 and clinch the doubles match point. Ivanova then finished singles first for the second time in as many singles matches, defeating the Privateers’ Anja Luethi 6-3, 6-2. FRISCO, Texas – Northwestern State’s Polina Ivanova is the Southland Conference Player of the Week, the league announced Tuesday. Southland Conference Players of the Week are presented by NSU has now claimed three consecutive weekly awards. Polina Mutel earned the honor March 6, and Ela Iwaniuk won the award a week ago. The Lady Demons (10-5, 6-0 SLC) strung together their third straight weekend sweep of Southland opponents, winning Saturday 5-2 against Southeastern Louisiana and Sunday 6-1 over New Orleans. Ivanova and her side sit atop the standings as one of three league teams – Texas A&M-Corpus Christi (8-5, 3-0 SLC) and Central Arkansas (9-2, 2-0 SLC) – unbeaten in conference action. In their lone match this week, the Lady Demons will host Stephen F. Austin on Saturday at 1 p.m. CT. Southland weekly award winners are nominated and voted upon by each school’s sports information director. Voting for one’s own athlete is not permitted. To earn honorable mention, a student-athlete must appear on at least 25 percent of ballots.last_img read more


first_imgGlenveagh Castle turned blue for Autism Day. Pic by Geraldine Diver.Yesterday was world autism awareness day. The Autism Family Support Group ltd. organised a family fun day in Glenveagh national park where hundreds of people turned up to raise autism awareness.It has now become a tradition all over the world to light iconic buildings blue to raise autism awareness. Buildings like the Sydney opera house, Eiffel Tower. So the group organised a number of buildings in Letterkenny to go blue over the last number of years eg St Eunans Cathedral, Pole Star Roundabout.These have gone blue again this year but we decided to look outside Letterkenny and as far as we are aware no other heritage site in Ireland has gone blue so we approached Glenveagh and they agreed to light the castle up blue.We had a number of people out in Glenveagh last night at 10pm to see the castle lit up blue. A wonderful sight for all involved.GLENVEAGH CASTLE TURNS BLUE FOR AUTISM DAY was last modified: April 3rd, 2015 by StephenShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)last_img read more

Ridding research reactors of highly enriched uranium to take decades longer than

first_img Click to view the privacy policy. Required fields are indicated by an asterisk (*) On the technical side, nuclear scientists and engineers have struggled to develop replacement fuels for research reactors that are based on safer LEU. Research reactors are generally relatively small facilities that focus on materials science, reactor design, and the production of radioactive isotopes for medical purposes. Such research generally involves exposing materials to fluxes of neutrons from the reactors’ cores that are higher than those in larger commercial power reactors.To generate those high neutron fluxes, research reactors have relied on HEU. Uranium atoms come in different types, or isotopes, depending on the number of neutrons in their nuclei. The isotope uranium-235 has 92 protons and 143 neutrons in its nucleus, and it can undergo a nuclear fission chain reaction. In contrast, the isotope uranium-238 has three more neutrons in its nucleus and cannot undergo nuclear fission. Any mixture of uranium with more than 20% uranium-235 is considered highly enriched. Research reactors typically use uranium enriched closer to or above 90%—a level known as weapons grade uranium. In comparison, power reactors use uranium enriched to about 4% uranium-235.Researchers would like to switch the research reactors to LEU fuel, but to maintain the necessary neutron flux would require ensuring a very high density of uranium in the fuel. Researchers in Europe and Asia are developing a fuel in which granules of a uranium molybdenum alloy are dispersed within an aluminum matrix and then surrounded by an aluminum cladding. In contrast, the United States is developing a “monolithic” fuel that consists of a single ribbon of uranium molybdenum alloy clad in aluminum. In principle, the denser monolithic fuel could be used in all current research reactors, whereas the dispersed fuel could not.However, progress with both fuels has been slower than expected. For example, early versions of the dispersed fuel exhibited a tendency to swell as the fuel was consumed. And the monolithic fuel presents significant manufacturing challenges. Development of both fuels will likely take another 10 to 15 years, the report estimates.On the nontechnical side, Russia, which has 32 of the 74 research reactors still using or planning to use HEU, has expressed little interest in converting them to LEU. In fact, Russia has converted only one civilian research reactor to LEU, and that one with assistance from the United States. “This is not a priority with the Russian government,” said William Tobey, an expert on nuclear nonproliferation at Harvard University and a member of the report committee at the press conference.Given the prospects, the new report makes seven recommendations, including trying to engage in further collaboration with Russia, developing more detailed reporting on the conversion and closings of civilian research reactors, and planning for new facilities to replace the eight current U.S. civilian research reactors, the youngest of which is 45 years old.However, one recommendation is sure to draw the most attention and controversy. The United States has designated 20 tonnes of 93% enriched weapons grade uranium for civilian research reactors. Given the prospect of waiting another 15 years for a LEU fuel, the committee recommends immediately diluting that entire supply to 45% enrichment, a level that still leaves it highly enriched, and using it to fuel the research reactors in coming decades. That step would make the fuel less of a proliferation threat, but would surely raise eyebrows, as the U.S. has previously rejected the idea of using such fuel. That interim approach would also require two conversions of each reactor instead of one.A 45% fuel design has already been “validated” by bodies such as the U.S. Nuclear Regulatory Commission, the panel notes, so it could be used in relatively short order. And committee members stress that the step would be only a stop-gap measure to improve nuclear security in the short run. “This is not instead of, but complementary to the ultimate goal of using low enrichment uranium in all reactors,” said Paul Wilson, a committee member and nuclear engineer at the University of Wisconsin, Madison, at the press briefing.Hanging over all of this is the continuing prospect that eliminating HEU from civilian research reactors may take even longer than the report suggests—especially if Russia decides not to collaborate. 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 Since 1978, the United States and other nations have been pushing to eliminate the use of highly enriched uranium (HEU)—the kind of stuff that terrorists or a rogue nation might use to make an atomic bomb—from dozens of civilian research reactors around the world. However, achieving that goal will take far longer than officials had previously hoped, according to a new study by the National Academies of Sciences, Engineering, and Medicine. Only a few years ago experts had hoped to eliminate the use of HEU in civilian research reactors by 2018. But that objective cannot be reached until 2035 at the earliest, the report concludes.”Clearly there have been unexpected challenges, both technical and nontechnical, that have led to the significant extension of the timeframe,” said Julia Phillips, a former vice president of Sandia National Laboratories in Albuquerque, New Mexico, who chaired the report committee at a webcast press briefing today. A follow-up to a 2009 report, the new study was requested by Congress in 2012. Sign up for our daily newsletter Get more great content like this delivered right to you! Country Currently, global stock piles of HEU for civilian research total 60 tonnes, enough to make roughly 1000 bombs, and nonproliferation experts worry that civilian supplies may be less secure than far bigger military supplies. But nations have made progress over the past decade in reducing civilian use of HEU, notes Phillips, an applied physicist. Since 2009, 28 civilian research reactors have either converted to safer low enrich uranium (LEU) fuel or closed. However, 74 such reactors are either still using or planning to use HEU fuels, the report says. And progress is sure to slow, Phillips says. “The long and short of it is that the easy conversions have been made and the more difficult ones remain,” she says.last_img read more