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June 17, 2013
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Displaying results 1 - 25 of 2397 for southern. Subscribe to this search

  1. article Martina McBride to perform at AVA Amphitheater

    Friday, June 14, 2013 2:00 pm

    After two decades in the music business, Martina McBride is starting over. Now signed to Republic Nashville, with new management (Clint Higham of Morris Artists Management), a new co-producer (Byron Gallimore), newly-spotlighted songwriting skills (she penned over half the songs on Eleven, her new CD), and a brand new spirit of accomplishment, Martina is swinging into high gear. And she couldn’t be more thrilled.

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  2. article U.S. Rep. Ron Barber votes for strong national defense

    Friday, June 14, 2013 1:15 pm

    U.S. Rep. Ron Barber today joined a strong bipartisan majority of the House in voting to authorize Department of Defense programs and funding that strengthens sexual assault protections for service members, supports security efforts along the Southwest border, provides a pay raise for members of the military and includes robust funding for the Southern Arizona aerospace and defense industries.

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  3. Humane Society of Southern Arizona

  4. article Pet News - Philanthropy with Phlavor

    Friday, June 14, 2013 12:43 pm

    "Philanthropy with Phlavor" is on! Throughout June and October, you can support HSSA each time you dine at Pastiche by selecting us as your favorite nonprofit organization, and we'll receive 5% of the check amount (before tax, tip, or discounts)! CLICK HERE for details.

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  5. article Padres bounce back, beats Fresno 7-2

    Wednesday, June 12, 2013 11:56 am

    Tucson Padres Game Summary

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  6. article What's Up UA? - Marks on Martian Dunes May Reveal Tracks of Dry-Ice Sleds

    Wednesday, June 12, 2013 11:41 am

    NASA research indicates that hunks of frozen carbon dioxide – or dry ice – may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.
     
    Researchers deduced this process could explain one enigmatic class of gullies seen on Martian sand dunes by examining images from NASA's Mars Reconnaissance Orbiter, or MRO, and performing experiments on sand dunes in Utah and California.
     
    "I have always dreamed of going to Mars," said Serina Diniega, a planetary scientist at NASA's Jet Propulsion Laboratory, or JPL, in Pasadena, Calif., and lead author of a report published online by the journal Icarus. "Now I dream of snowboarding down a Martian sand dune on a block of dry ice."
     
    The hillside grooves on Mars, called linear gullies, show relatively constant width – up to a few yards or meters across – with raised banks or levees along the sides. Unlike gullies caused by water flows on Earth and possibly on Mars, they do not have aprons of debris at the downhill end of the gully. Instead, many have pits at the downhill end.
     
    "In debris flows, you have water carrying sediment downhill, and the material eroded from the top is carried to the bottom and deposited as a fan-shaped apron," said Diniega. "In the linear gullies, you're not transporting material. You're carving out a groove, pushing material to the sides."
     
    Images from MRO's High Resolution Imaging Science Experiment, or HiRISE, camera, operated by the University of Arizona, show sand dunes with linear gullies covered by carbon dioxide frost during the Martian winter. The location of the linear gullies is on dunes that spend the Martian winter covered by carbon dioxide frost. The grooves are formed during early spring, researchers determined by comparing before-and-after images from different seasons. Some images have even caught bright objects in the gullies.
     
    Scientists theorize the bright objects are pieces of dry ice that have broken away from points higher on the slope. According to the new hypothesis, the pits could result from the blocks of dry ice completely sublimating away into carbon-dioxide gas after they have stopped traveling.
     
    "Linear gullies don't look like gullies on Earth or other gullies on Mars, and this process wouldn't happen on Earth," said Diniega. "You don't get blocks of dry ice on Earth unless you go buy them."
     
    That is exactly what report co-author Candice Hansen, of the Planetary Science Institute in Tucson, Ariz., did. Hansen has studied other effects of seasonal carbon-dioxide ice on Mars, such as spider-shaped features that result from explosive release of carbon-dioxide gas trapped beneath a sheet of dry ice as the underside of the sheet thaws in spring. She suspected a role for dry ice in forming linear gullies, so she bought some slabs of dry ice at a supermarket and slid them down sand dunes.
     
    That day and in several later experiments, gaseous carbon dioxide from the thawing ice maintained a lubricating layer under the slab and also pushed sand aside into small levees as the slabs glided down even low-angle slopes.
     
    The outdoor tests did not simulate Martian temperature and pressure, but calculations indicate the dry ice would act similarly in early Martian spring where the linear gullies form. Although water ice, too, can sublimate directly to gas under some Martian conditions, it would stay frozen at the temperatures at which these gullies form, the researchers calculate.
     
    "We have seen blocks of ice sitting in the channels in our HiRISE images," said Alfred McEwen, a professor of planetary science at the UA who leads the HiRISE program who co-authored the paper. "Later, we saw them disappear by sublimation, in a matter of months."
     
    Although the HiRISE camera doesn't allow researchers to measure the blocks' composition directly, McEwen said they behaved in the right way for carbon dioxide ice.
     
    "Water ice block should be stable for much longer periods of time, and we know there is ample carbon dioxide in the area where those gullies are seen – in the higher latitudes of Mars' southern hemisphere."
     
    "The origin of these linear gullies has been a mystery," McEwen added. "This study provides some direct clues as to how they are forming. The experiments using the dry ice show that our hypothesis is plausible."
     
    Hansen also noted the process could be unique to the linear gullies described on Martian sand dunes.
     
    "There are a variety of different types of features on Mars that sometimes get lumped together as 'gullies,' but they are formed by different processes," she said. "Just because this dry-ice hypothesis looks like a good explanation for one type doesn't mean it applies to others."
     
    McEwen said the study adds an exciting new piece to growing series of discoveries about ongoing, active processes shaping the surface of the Red Planet. 
     
    "We are finding Mars is not Earth-like as it looks," he said. "Dry ice doesn't naturally exist here on Earth. MRO and the HiRISE instrument are healthy, and the longer the mission goes on, the longer we can observe and really understand these processes over the long term."
     
    McEwen said the team is planning to continue to monitor these sites to see more ice blocks in action.
     
    "We can't get any information from other instruments on the orbiter, because the features are too small," he explained. "But we are learning more about the distribution and latitude of those features and when they are active."
     
    The UA's Lunar and Planetary Laboratory operates the HiRISE camera, which was built by Ball Aerospace & Technologies Corp. of Boulder, Colo. JPL manages MRO for NASA's Science Mission Directorate in Washington. Lockheed Martin Space Systems of Denver built the orbiter.
     

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  7. article Local art camp for local youth

    Wednesday, June 12, 2013 4:00 am

    Last week, students at the Toscana Studio and Gallery worked diligently on their art projects during the summer art and sculpture camp for children.

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  8. article HappENings - Week of June 9

    Wednesday, June 12, 2013 4:00 am

    THEATER

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  9. article Confident in immigration bill

    Wednesday, June 12, 2013 4:00 am

    I think that those of us here in southern Arizona know more about immigration than most. We have seen the effect that it has on communities and businesses. That is why I am relieved that the immigration bill was constructed by the Gang of eight, which has two Arizona Senators on it. Senators Flake and McCain have visited our border cities and heard from leaders on the issue. I am confident that this bill will not only address our insecure border, but will also update our country’s current legal immigration system. Marana is home to some great tech and engineering companies, and I’m sure giving them the ability to recruit and keep the world’s best is something they look forward to.

  10. article Karate 4 Kids Martial Arts to Relocate to Plaza Del Oro Shopping Center

    Wednesday, June 12, 2013 4:00 am

    Life-time Martial Arts #1, Inc is relocating Karate 4 Kids Martial Arts from Oracle and Magee roads to Plaza Del Oro Shopping Center at the northeast corner of Oracle and Orange Grove Roads. The new address for the 2,100-square-foot Karate 4 Kids martial arts studio will be 6450 N. Oracle Road. The owner, W.J. Choi, expects to open in the new location by June 16.

  11. article Allstate teams up with Community Foodbank of Southern Arizona

    Tuesday, June 11, 2013 6:09 pm

    Today Tucson-area Allstate agents and employees teamed up with Community Food Bank of Southern Arizona to sort donated food and ultimately help fight community hunger.

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  12. article Skyline Country Club art exhibit opening June 13

    Tuesday, June 11, 2013 11:19 am

    "Whether I'm at home or abroad, I see each new scene as a still life, a moment in time in a landscape: a tractor posing patiently in the sun, or a pattern of light in a mountain sunset," Jane Barton stated.

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  13. article Park Place Guitar Festival June 14-15

    Monday, June 10, 2013 8:00 am

    Presented by Southern Arizona Arts and Cultural Alliance and sponsored by Park Place, the Guitar Festival will include live music, Air Guitar Competition, giveaways, guitar show and swap, an improvisation jam, kids' activities, guitar orchestra and mariachi performances by local school groups, GuitART, vendors and exhibitors.

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  14. article (June 9) Today's Top Headlines - Zimmerman trial is set to begin

    Sunday, June 9, 2013 8:36 am

    According to a USA Today report, the Trayvon Martin murder case has ignited protests, death threats, online campaigns, and become the center of national discussion about race, gun laws and self-defense.

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  15. article SAACA's top ten summer arts and culture events

    Thursday, June 6, 2013 10:06 am

    SPLASH!

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  16. article Padres win 5-4 in 10 innings

    Wednesday, June 5, 2013 9:29 am

    Tucson Padres Game Summary

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  17. article Marana Town Talk: Marana has close proximity to local airports, airstrips

    Wednesday, June 5, 2013 4:00 am

    Marana’s proximity to the Tucson and Phoenix metropolitan areas makes it one of the better-positioned communities in the state. With Interstate 10, the Union Pacific Railroad and two airports within the town’s borders and planning area, Marana has become a hub for people wanting to live or do business in Southern Arizona.

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  18. article Happenings

    Wednesday, June 5, 2013 4:00 am

    THEATER

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  19. article Epazote Kitchen & Cocktails working to draw in local diners

    Wednesday, June 5, 2013 4:00 am

    Open now for almost a year, Epazote Kitchen & Cocktail gives its guests the taste of southern cuisine and beautiful views of the Pusch Ridge Mountains. 

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  20. article PCC in national push to train Baby Boomers

    Tuesday, June 4, 2013 4:31 pm

    Pima Community College East Campus recently was chosen to join the Plus 50 Encore Completion Program, a national effort to train 10,000 baby boomers nationwide for new jobs in healthcare, education and social services. The program is sponsored by the American Association of Community Colleges (AACC).

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  21. article Padres defeat Reno 4-2

    Tuesday, June 4, 2013 8:18 am

    Tucson Padres Game Summary

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  22. article Urban Garden Project Grows Fresh Produce and Opportunity

    Tuesday, June 4, 2013 7:56 am

    (NewsUSA) - Southern California will soon have a new source of locally grown, organic produce, not to mention it will be home to one of the most energy-efficient urban garden systems in the U.S.

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  23. article Mix of rock and country from Greg Spivey June 13

    Monday, June 3, 2013 10:34 am

    Blend modern with old-time country and roll in some classic rock for a tasteful meal of great music.

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  24. article Padres beat Reno 8-6

    Sunday, June 2, 2013 9:43 am

    Tucson Padres Game Summary June 1, 2013 Tucson 8 Reno 6 - 10 Innings WP: Mikolas (2-1) LP: Marshall (1-4) S: None Time: 3:54 Attn: 4,874 Dean Anna’s tenth-inning RBI single brought home the go-ahead run to help the Tucson Padres defeat the Reno Aces 8-6 Saturday at Aces Ballpark. The extra-inning win was the third of the season for the Padres (30-26) who are now one game out of first place in the Southern Division.

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  25. article (June 2) Today's Top Headlines - The top 10 stories of the day

    Sunday, June 2, 2013 9:01 am

    1. U.S. AND CHINA TO HOLD TALKS ON HACKING

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