Modeling the radio echo reflections inside the ice sheet at Summit, Greenland

first_imgRadio echo surveys to determine the thickness of ice sheets often record reflections from inside the ice. To increase our understanding of these internal reflections, we have used synthetic seismogram techniques from early seismic modeling to construct two models. Both models were one-dimensional; the first considered only primary reflections, while the second included both primary and multiple reflections. The inputs to both models were a radio pulse and data from the Greenland Ice Core Project (GRIP) core of length 3028 m. The ice core data consisted of a profile of the high-frequency conductivity, calculated from dielectric profile (DEP) measurements, and a smooth profile of the real permittivity. The models produced synthetic radargrams which are the energy reflected from conductivity variations as a function of the two-way travel time. Both models gave similar results, indicating that multiples do not alter the travel time of the reflections, i.e., no O’Doherty-Anstey effect at our time resolution. One of the results was then processed to simulate the reflected energy passing through the receiver circuit of a radio echo system and then compared with a recorded trace. The processed result contained many of the larger reflections recorded below about 500 m, including nearly all the features from depths greater than 1500 m, in particular, several interstadial events in the Wisconsin age ice. Since high-frequency conductivity variations are dominated by chemical changes which are caused by deposition on the surface of the ice sheet, it is possible to conclude that the reflections deep inside the Greenland ice sheet can be treated as isochrons.last_img read more

SAIC Signs Contract to Provide Fighter OT&E Services

first_img View post tag: Signs May 23, 2011 Training & Education View post tag: Provide View post tag: OT&E View post tag: Navy Science Applications International Corporation (SAIC) announced today it was awarded a prime contract by the U.S. Air Force (USAF) to provide fighter operational test and evaluation (OT&E) services in support of the Air Force Operational Test and Evaluation Center (AFOTEC). The single award, indefinite-delivery/indefinite-quantity (IDIQ) contract has a five year base period of performance and a contract ceiling value of $85 million, if all options are exercised. Work will be performed primarily at the Kirtland Air Force Base in Albuquerque, N.M.; Edwards Air Force Base in Edwards, Calif.; and Nellis Air Force Base in Las Vegas, Nev.AFOTEC tests and evaluates new warfighting capabilities in operationally realistic environments, influencing and informing national resource decisions. Under the contract, SAIC will provide engineering and technical test services as required in support of OT&E activities including: integrated testing in support of fighter aircraft acquisition programs; test design, planning, execution and reporting; digital test tool development and training; and development of test capability requirements, shortfalls, and solutions.“We look forward to using our demonstrated engineering and analytical expertise to provide AFOTEC with sophisticated operational test and evaluation services,” said Charles Zang, SAIC senior vice president and business unit general manager. “SAIC will work diligently with AFOTEC and the USAF to field the latest stealth fighter technology, helping ensure systems are combat-capable and ready to support the Warfighter.”About SAICSAIC is a FORTUNE 500® scientific, engineering, and technology applications company that uses its deep domain knowledge to solve problems of vital importance to the nation and the world, in national security, energy and the environment, critical infrastructure, and health. The company’s approximately 43,000 employees serve customers in the U.S. Department of Defense, the intelligence community, the U.S. Department of Homeland Security, other U.S. Government civil agencies and selected commercial markets. Headquartered in McLean, Va., SAIC had annual revenues of $11.1 billion for its fiscal year ended January 31, 2011.[mappress]Source: SAIC, May 23, 2011; Back to overview,Home naval-today SAIC Signs Contract to Provide Fighter OT&E Services View post tag: News by topiccenter_img View post tag: services View post tag: fighter View post tag: contract Share this article View post tag: SAIC SAIC Signs Contract to Provide Fighter OT&E Services View post tag: Navallast_img read more

ICC convicts Ugandan rebel commander of war crimes

first_imgTHE HAGUE, Netherlands (AP) — The International Criminal Court has convicted a former commander in a notorious Ugandan rebel group of dozens of war crimes and crimes against humanity. Dominic Ongwen was abducted by the Lord’s Resistance Army as a 9-year-old boy, transformed into a child soldier and later promoted to a senior leadership rank in the shadowy militia. He faces a maximum punishment of life imprisonment after being convicted on Thursday of 61 offenses, ranging from multiple murders to forced marriages. Defense lawyers had argued that Ongwen was also a victim of the rebel group. The judgment against him outlined the horrors of the LRA’s attacks on camps for displaced civilians in northern Uganda in the early 2000s.last_img

LGBTQ group chooses name, advisor

first_imgThe student organization formed to address lesbian, gay, bisexual, transgender and questioning (LGBTQ) student issues will begin the academic year with a new name and an advisor.  Student body president Alex Coccia said several students who were involved with the 4 to 5 Movement, the unofficial AllianceND club and other organizations voted to name the new group “PrismND.” The Office of Student Affairs has since approved the decision.  “The fact that [the name] reflects quite a spectrum and a range of interests and passions and identities, I think is something that people will identify with and appreciate when the group gets off the ground,” Coccia said.  Christine Caron Gebhardt, director of the Gender Relations Center (GRC), said other universities use the name “Prism” for their LGBTQ student organizations. The GRC and student leaders added “ND” to the name of Notre Dame’s organization to make it easier for the University’s students to identify the club as a fixture at Notre Dame. Sophomore Connor Hayes, who helped to launch PrismND, said the name is intended to be all-inclusive, instead of specific to people who identify as LGBTQ.  “I think relating to the Catholic identity of [Notre Dame] and backgrounds of people coming from religious environments, [some] people don’t really want to identify as gay or lesbian, so … we were just going for a name that was very inclusive,” he said. “We wanted this name to be one that can last and kind of become a brand.”  Maureen Doyle will work as the advisor for PrismND in her capacity as assistant director for LGBTQ student concerns. Doyle, who was hired over the summer, previously worked as the general manager of Legends of Notre Dame. She will begin her new job Sept. 2.  “My challenge that I’ll put forward to the group is I’d love to see them think long-term and what kind of a legacy they want to leave behind within this first year, what kind of traditions they want to start,” Doyle said. “They’re setting up the success of the group for the next 20, 30, 40, 50, however many decades. “I really want them to keep the big picture in mind as they go through their first year and to think beyond just what they want to accomplish in the next 12 months, but what they really want to set up for future student leaders within the organization.” Doyle will serve on the advisory council on LGBTQ issues to Vice President for Student Affairs Erin Hoffmann Harding. She will also work with the GRC’s FIRE Starters, who are peer educators that foster dialogue on issues of identity, gender and healthy relationships.  PrismND hopes to receive approval for its bylaws by Activities Night on Sept. 3, Hayes said. Coccia said the organization will then elect its leadership and begin to host regular meetings.  “The first year, especially the first semester, is just getting its feet off the ground, building the relationships that the student leaders need to build with staff members, with administrators, with the organization members,” Coccia said. “And then starting to kind of see what events we can do toward the end of the fall or the spring to really get our name out there and do the service … that we’ve been emphasizing as a particular component of the group.” Gebhardt said she hopes PrismND will build relationships with other student organizations, the GRC, Campus Ministry and additional University departments. “We realize this is about who we are as a community, and [PrismND is] one facet in which students can feel welcomed and loved and supported on this campus and that we will all work together to try to create the community that Notre Dame can be and I hope will be,” Gebhardt said. “We want the student organization … to emerge from the ideas and the interests and the hopes and dreams of the students in collaboration with all of us across campus.”  Hayes said one of his goals in developing PrismND is to create a more visible LGBTQ presence on campus.  “I hope that there’s some educational programming, maybe on a very formal, bring in a speaker point, but also kind of working with parts of the University, like the Gender Relations Center, to come up with educational programming for the student body, like going into dorms,” he said.  PrismND will host social events and will serve as “a focal point for the LGBTQ community on campus to kind of come together, and also to address concerns,” Hayes said.  The organization’s first event will be a picnic Thursday from 5 to 7 p.m. in the Coleman-Morse Center’s lounge and patio.  Sophomore Bryan Ricketts, who also helped to begin PrismND, said he thinks the new student group will foster a smoother relationship between the Office of Student Affairs and LGBTQ students and their allies. “In the past, the relationship has been one of winners and losers,” Ricketts said. “The relationship that we are hoping to create in this organization will be a much more productive one on both ends.” Doyle said the formation of PrismND was “a great move for the University.” “I’ve had the opportunity to interact with some of the students who were instrumental in helping over the summer, and they’re all really excited about it,” she said. “I think they have a big challenge in front of them, but it’s one that they’re definitely ready for and excited about. “ More information about PrismND is available at and on the group’s  Facebook and Twitter pages.last_img read more

Battle roots and bugs

first_imgLearn how to play in the dirt, relocate plants, fight bugs and a “root war” on “Gardening in Georgia with Walter Reeves” May 28 and 30.”Gardening in Georgia” airs on Georgia Public Broadcasting stations across Georgia each Wednesday at 7 p.m. and Saturday at 12:30 p.m. and 6:30 p.m. Show host Walter Reeves will play in the dirt again with Elizabeth Dean. She’ll show him how to plant bare root magnolia trees with mud.Learn how to move plants to where they are the happiest. Reeves will uproot and relocate his loropetalum and hosta plants.The tiny bugs biting your rosemary, butterfly bush or foxglove plants may be spider mites. Reeves will bite them back.Reeves will revert back to childhood, too, to battle again that age-old root war between trees and grasses with his toy soldiers.“Gardening in Georgia” is coproduced by the UGA College of Agricultural and Environmental Sciences and GPB. It’s underwritten by McCorkle Nurseries and the Georgia Urban Agriculture Council.Learn more about the show and download useful publications at the Web site read more

Developer Behind Kansas Coal-Fired Project Says Plant Stands Little Chance Now of Being Built, Will Write Off $93 Million Loss

first_img FacebookTwitterLinkedInEmailPrint分享Lawrence Journal-World:In an August filing with the Securities and Exchange Commission, Denver-based Tri-State Generation and Transmission Association described as “remote” the chances that it will ever build the plant, and it said the company is writing off as a loss more than $93 million it has already spent on the project.That statement came just five months after the Kansas Supreme Court cleared the way to proceed with construction, rejecting a challenge from environmental groups to an air permit issued by the Kansas Department of Health and Environment.The plant had been in the works for more than a decade, however, and by the time that court decision came down, there were new federal regulations in place making it more difficult to build new coal-fired power plants, and the economics of renewable energy had changed significantly.Tri-State and Sunflower Electric Cooperative based in Hays first proposed to expand an existing coal-fired plant in Holcomb in 2007In its filing with the SEC, Tri-State said its board of directors had not yet decided how it plans to recover the $93 million loss, but it said it would not attempt to recover it through rates it charges its customers.More: Holcomb power plant unlikely to be built, company says; $93 million already spent Developer Behind Kansas Coal-Fired Project Says Plant Stands Little Chance Now of Being Built, Will Write Off $93 Million Losslast_img read more

South Carolina considers shutting Bald Rock Heritage Preserve because of graffiti

first_imgDoes your podcast rotation need a boost? Oboz Footwear is launching a new podcast called True to the Trail, which will explore the beauty and power of the outdoors. “Storytelling has always been central to our brand and the podcast gives us a platform to share the stories of Oboz’s partners, friends, and staff,” said podcast host Rich Hohne. Officials are asking the public to report any illegal activity at the preserve. “Hopefully if the public gets involved and can help report the acts of vandalism that have happened… we’ll be able to keep it and let folks who love it enjoy it,” Lucas said.  South Carolina considers shutting Bald Rock Heritage Preserve because of graffiti (photo of Bald Rock Heritage Preserve from Getty Images) South Carolina Department of Natural Resources says they are considering keeping Bald Rock Heritage Preserve in Greenville County closed permanently if people don’t stop painting graffiti on the rocks. The closure would be a last-ditch measure, spokesperson Greg Lewis said, but it is being considered. Cows are wearing face masks now, too, but not because of the coronavirus The first podcast episode features a conversation with John Leary, Executive Director of Trees for the Future, an organization focused on helping end hunger and extreme poverty for rural African farmers through the revival of the forest garden.  Wearing face masks has become a part of our new normal… but we’re not the only animals in on the act. A startup in the U.K. has designed face masks for cows, but these masks have nothing to do with the global pandemic. Instead, their role is to help prevent climate change. Oboz Footwear launches new podcast featuring gear and hiking experts A company called Zelp Ltd., has developed masks for cows that may reduce their methane emissions by up to 60%. Cows produce methane when they burp, thanks to the way their digestive systems break down the grasses and hay they eat. While a few cow burps may not seem significant, the 1.5 billion cows on the planet are estimated to produce as much as 5% of global greenhouse gas emissions.last_img read more

Flanders Man Sentenced for Fatal DWI Crash

first_imgSign up for our COVID-19 newsletter to stay up-to-date on the latest coronavirus news throughout New York A Flanders man was sentenced Thursday to 12 ½ to 25 years in prison for driving drunk and causing a crash that killed a 56-year old woman in Hampton Bays last year.Joseph Perez was convicted last month at Suffolk County court of vehicular homicide and vehicular manslaughter in the death of Donna Sartori.“Because of you Joseph Perez, and your reckless drinking and driving, my sister’s life was cut short,” the victim’s sister, Debra Fox, said before the 31-year-old man was sentenced.Prosecutors said Perez was driving his Ford pickup truck westbound on Montauk Highway when he crashed into a parked car and then the victim’s car as she delivered newspapers at 4:15 a.m. on Jan. 5, 2014.Sartori was pronounced dead at the scene. Perez was found to have a blood alcohol content nearly three times the legal limit of 0.08 percent after a night of bar hopping with friends, authorities said.last_img read more

National survey reveals new leadership priorities

first_imgRecently I was asked to participate in a national study conducted by the highly regarded executive recruiting firm, Heidrick & Struggles. The survey of over 500 association leaders highlighted several known issues leaders face but also exposed the changing role of the CEO. Without going into too much detail, I would like to highlight a few points from the survey report.The most striking feedback that caught my attention is that a majority of respondents (54%) feel “A focus on mission and organization vision” is their area of greatest focus. Above Membership Retention and Outreach (52%) and Financial Oversight (42%). This is one of the first points that I have mentioned for years working with other CEOs and executives. Start with a vision and build the organization to support that vision. It used to be that financial performance was the first concern. Even during my tenure at CUNA, I saw this shift. We were able to create an organization with a mission strong enough to support financial and membership goals.During a recent physical, my doctor practically scoffed at my regimen of walking 3-5 miles every day. He explained that since I had been doing this routine for so long it had become my “new normal” and thus I needed to incorporate additional exercises to achieve additional benefits. In many ways, I believe that this is what is happening with association CEOs.Financial Oversight and Membership Retention and Outreach are becoming the “new normal” and the incorporation of a visionary, mission driven, leader is the expectation. As the survey report states, “Association CEOs are an evolving breed. They must adapt to an increasingly combative political backdrop while contending with shrinking membership, competition for resources, and tough decisions. They must serve as the organization’s visionary, not just its operational manager.”One additional point that is alluded to in the report and that is critical in the application of its findings is the role of executives and managers in supporting a mission and vision. The only way that the expectation of a visionary CEO can be fulfilled is if the team supporting Membership, Financial Oversight, Advocacy, and other operational functions is autonomous and reliable. As a CEO, getting the most out of ourselves and those around us is often our primary focus each day. I have been fortunate to have excellent advisors, both internal and external throughout my career, and have been able to pass along those services to others in more recent years.As part of the credit union movement, we don’t have to look far to find our mission. It is the visionaries that are harder to find. Looking beyond the daily duties on our desks may seem frivolous but in fact it makes a leader appear fearless. Identifying a need, finding a unique solution, and having the faith in your idea to bring it to fruition is courageous. Follow your vision!Read the full Heidrick & Struggles survey report. 33SHARESShareShareSharePrintMailGooglePinterestDiggRedditStumbleuponDeliciousBufferTumblr,Daniel Mica Dan Mica, former head of the Credit Union National Association (CUNA), established The DMA Group as a means to combine a myriad of experience into a one-stop consultancy. Elected in … Web: Detailslast_img read more