Thermoviscous stability of ice-sheet flows

first_imgThe shallow-ice approximation is used to analyse the normal-mode stability of long-wavelength, thermally coupled, free-surface flows of glaciers and ice sheets along infinite flow sections. The viscosity of the ice changes with temperature, and the ice is also thermally coupled with the bedrock. An assumption of quasi-uniform flow, where the downstream flux of mass and energy is assumed to be constant over relatively short wavelengths, permits vertical advection due to accumulation to be considered. The assumption allows realistic representation of the vertical velocity distribution and temperature distributions within the modelled flow. Nevertheless, the linearized equations are formally independent of the assumption of quasi-uniform flow. The linearized equations are Fourier-transformed over the horizontal plane and an algebraic eigenvalue problem constructed which considers the Fourier-transforms of the vertically varying temperature and thickness. The dependence of the eigenvalues on wavenumber, both parallel and orthogonal to flow, accumulation rate, geothermal heat flux, surface temperature and slope is computed. Extensive linearly unstable regimes where the base is well below melting point are found, which correspond only approximately to negative slopes in the flux/thickness relationship (supercritical zones). The most unstable parts of these regimes have finite along-flow wavelength, and have very long transverse wavelength. These modes are found to be more unstable in two senses: (i) they bifurcate for lesser thicknesses; (ii) they have greater growth rates. All computed wave velocities of unstable modes were downslope. Less unstable modes with short and medium transverse wavelengths are found which excite the temperature field only. Time constants range between ten and one thousand years. There is no strong evidence for stream-pattern formation through a thermoviscous instability mechanism.last_img

Signal variability in replicate ice cores

first_imgReplicate ice cores have been drilled about 10 m apart for the top 790 m of the ice sheet at Dome C, Antarctica. This provides an opportunity to examine inter-core variation of the signal for identical events, based on dielectric profile (DEP) comparisons. Comparison of the signal from the same core (a section 48 m long), measured 1 year apart, showed good reproducibility, with peak heights varying by around 10% between the two measurements. For the two replicate cores, identical peaks were matched and showed variability between cores of typically a factor 1.5. This can be explained based on the likelihood of significant time periods of missing accumulation in any single core at sites with such low snow accumulation rate. To synchronize core depths by matching peaks, it is essential to use the pattern of peaks, rather than just widely spaced individual strong peaks. To derive a quantitative volcanic index from these low-accumulation rate sites, it will be necessary to combine or average the results from several closely spaced parallel cores.last_img

Russia: Shipbuilders Confuted Military’s Refusal to Built Mistrals

first_img View post tag: Confuted Russia: Shipbuilders Confuted Military’s Refusal to Built Mistrals Share this article View post tag: News by topic United Shipbuilding Corporation (USC) has not received any instructions fr om Russian defense ministry…[mappress]Source: Russian Navy, December 24, 2012 View post tag: built View post tag: Shipbuilders View post tag: Military’s December 24, 2012 View post tag: Navy Training & Education View post tag: Mistrals View post tag: refusal Back to overview,Home naval-today Russia: Shipbuilders Confuted Military’s Refusal to Built Mistrals View post tag: Navallast_img

News story: Ministry of Defence Police ACC Paul McLaughlin retires

first_img Paul’s career has been exemplary and his boundless enthusiasm to get the job done is an example to many. He has been an outstanding MDP officer and I know that everyone in the force will join me in wishing him all the very best for a happy retirement with his family. Looking back, I’m really happy with the choices I made during my MDP career. I’ve been fortunate to have experienced some challenging command positions, in addition to leading on key strategic change programmes. The successful outcomes of some of my work are still prevalent in the Force today and it’s that contribution, coupled with the resulting benefits to our staff, that gives me the greatest pleasure and which I’ll remember most. What is important to me, in just about every single thing I’ve ever done in my career, is that I’ve gone into my work with the right intentions and that goes a long way. I consider myself as a stalwart ambassador for all things MDP and as I look forward to my retirement on leaving the force, it’s the people that I will miss most, every element of my success has been influenced one way or another by the MDP workforce. I will look back with fond memories, thank you. Paul joined the MDP in 1984, following an early career in the Merchant Navy. His first MDP posting was as a beat patrol officer at the Royal Navy Armament Depot (RNAD) in Beith, Ayshire, moving to the Clyde Marine Unit as a police coxswain 5 years later. In 1992 Paul was promoted to Sergeant and transferred to RNAD Coulport.After successfully gaining a National Police Trainer qualification at the Scottish Police College at Tulliallan, Paul moved to the MDP’s Police Training Centre at Wethersfield, where he was consequently promoted to Inspector and, in March 1999, became Head of PTC, on temporary promotion to Chief Inspector rank.In July 2001 Paul was substantively promoted to Chief Inspector and returned to Scotland, stationed at RNAD Coulport as an Operational Shift Commander. Two years later, Paul moved back to MDP HQ taking up position as Head of the International Policing and Secondments Office. This involved overseeing and briefing on the operational arrangements for deployments to locations such as Kosovo, Pitcairn Islands, Kenya, Bosnia and Iraq.In 2004 Paul was promoted to Superintendent, as Head of Learning and Development (HoLD), with full responsibility for the delivery of police training in the force. At the time the MDP had agency status along with the Ministry of Defence Guard Service (MGS), known as the Ministry of Defence Police and Guarding Agency (MDPGA), and Paul was therefore ultimately responsible for coordinating, developing and integrating all MGS staff training and development needs in addition to those of MDP staff.From 2008 to 2010 Paul was Senior Police Officer at AWE Aldermaston, before returning to MDP HQ to lead the review and restructure of HQ staffing, following which he took up post as Head of the new Operational Capability Centre (formerly the PTC). In 2012 Paul was promoted to Chief Superintendent and took up post as Nuclear Commander at Abbeywood, where he set up and led a new Nuclear Command structure.At the beginning of 2014, Paul was appointed Temporary Assistant Chief Constable for Force Operations and, following successful completion of the National Chief Police Officer Strategic Command Course (SCC), was substantively promoted to ACC in 2016. During his time as ACC Paul has led on a range of change/improvement projects including infrastructure reorganisation, increased capability, programme planning, the Force complement reset and as strategic lead on both critical and routine operational and business incidents.Reflecting on his MDP career, Paul said:center_img Chief Constable Andy Adams commented:last_img

Watch Bob Weir’s Acoustic “Bird Song” On Night Two Of His Campfire Tour

first_imgGrateful Dead guitarist Bob Weir kicked off his brief, country-spanning “Campfire Tour” last Friday, and stopped at the Fox Theater in Oakland, CA for a great performance last night. Weir recently released Blue Mountain, his first full batch of solo songwriting in over 30 years. The album itself paints a beautiful picture of cowboy living, but the music truly comes to life witnessing Weir with a guitar in hand.At times Weir would play by himself, at others he would perform with his newly-arranged ensemble that includes Steve Kimock, Bryan Devendorf, Scott Devendorf, Jon Shaw and Josh Kaufman. While the show focused on the music of Blue Mountain, there were plenty of treats for Weir’s longtime fans. He even opened the show with a cover of Bob Dylan’s “When I Paint My Masterpiece,” and included “Big River,” “Friend of the Devil,” “Bird Song,” “Cassidy,” “Ship Of Fools,” “Standing On The Moon” and “Going Down The Road Feelin’ Bad” throughout the performance. The encore saw Weir and his band play “Ki-Yi Bossie” and “Peggy-O,” closing out the night with the emotional two-song pairing.Thanks to YouTube user gridlifeTV, we can watch a handful of videos from the performance, including the great 14-minute version of “Bird Song”. Tune in below and enjoy.GonesvilleBird SongKi-Yi BossieThe full setlist can be seen below. [Photo courtesy of mattbusch28 // Instagram]last_img

Seeing what leaders miss

first_imgAlthough they may seem disparate at first glance, crises like the Catholic Church clergy sex-abuse scandal, investor Bernie Madoff’s multibillion dollar Ponzi scheme, and the 2008 global financial meltdown all have at least one commonality: For years, some very smart people failed to notice or act on critical information that could have limited the damage.More recently, executives at the Veterans Administration and General Motors have been criticized for failing to see and cure corrupt organizational cultures that led to accusations of criminal harm done to patients and consumers by negligent employees.So why didn’t the leaders of these organizations, or others in similar straits, identify key problems and act before things turned catastrophic?“They don’t want to see, they can’t see, the organization isn’t designed to see, and there’s other people who are doing their best to keep us from seeing,” said Max Bazerman, the Jesse Isidor Straus Professor of Business Administration at Harvard Business School and co-director of Harvard Kennedy School’s Center for Public Leadership,Social scientists have long identified our tendency to overlook bad news when it suits us as “motivated blindness,” a term that refers to a systemic failure to notice unethical behavior in others when it’s not in our interest to do so. The condition affects virtually everyone. Even leaders who have gained tremendous success through focus and application in one arena sometimes lack the self-awareness to routinely question whether information on which they’re basing decisions is reliable.“Research in the field of behavioral ethics has found that when we have a vested self-interest in a situation, we have difficulty approaching that situation without bias, no matter how well-calibrated we believe our moral compass to be. We want to think the best of our kids and spouses and we’re disinclined to speak against those with influence in our offices and occupations,” Bazerman writes in his latest book, “The Power of Noticing: What the Best Leaders See.”Even with his expertise in behavioral psychology, Bazerman only recently realized that his own noticing skills were “truly terrible.” Hired a few years ago as an expert witness for the Department of Justice in what was to be the largest-ever lawsuit against the tobacco industry, Bazerman says that just before he was due to testify, he felt pressured by the government to water down written testimony he had submitted to the court in which he recommended structural changes to the tobacco industry.While the request seemed odd and vaguely unsettled him, Bazerman, distracted by other stresses and uncertain whether the request was corrupt, didn’t act on those feelings at the time. It wasn’t until six weeks later, after reading that another expert in the case said that he too had been pressured to alter his testimony, that he realized he had failed to notice that the gravity of the situation ― possible witness tampering ― had called for decisive action.“We see something that we don’t quite know what to make out of it, we don’t know how to interpret it, we’re already very busy, we don’t think that we would actually be happier if we learned some bad news and we just don’t learn more,” he said about why people tend to brush off difficult information. “So the question is, did I not notice or did I notice and not act? I think that the answer’s often somewhere in the middle.”The failure to anticipate and then head off what Bazerman calls “predictable surprises” until after trouble has reared its head, as demonstrated by the U.S. airline security breakdown of 9/11 or the New Orleans levee failures during Hurricane Katrina, often stems from a mix of cognitive, organizational, and political causes. A leader may be overconfident in his or her ability to understand and fix a problem, or deliberately ignore warning signs because of financial or political expediency.One way leaders can overcome a tendency to miss critical clues, Bazerman said, is developing a “noticing mindset,” frequently asking themselves and others inside and outside their organizations, “What are the critical threats and challenges that we’re ignoring?” Another is designing internal systems, such as auditing or human resources or sales, to deliver the most useful and accurate data.“I think lots of organizations make the mistake of hiring a McKinsey or a Bain or a [Boston Consulting Group] and they keep on hiring the same old people over time,” he said. “If you’re going to use outside consultants, don’t allow them to become insiders. One of the things you want from them is to be outsiders, so after a fairly limited amount of time … there may be some wisdom of getting rid of them and bringing in a different consultant for the next project so that you maintain that fresh outlook or perspective.”last_img

The lives of Harvard’s Rhodes

first_imgOXFORD, England — “Studying at a place that has been around since before the Black Death is humbling and awe-inspiring,” said Alexander Diaz ’14.A Rhodes Scholar from 2014–15, Diaz was intrigued by the University of Oxford, where some buildings go back more than 300 years before Harvard was founded. Diaz was captivated by meandering through the grassy meadows of Magdalen College, where J.R.R. Tolkien and C.S. Lewis once strolled. He even visited the bench where many claim Tolkien sat when saw the two tall buildings that inspired his book “The Two Towers.”“Oxford is full of wonderful treasures like that,” he said.A recent trip to the world’s oldest English-speaking University revealed similar enthusiasm among current Rhodes Scholars from Harvard. A new U.S. Rhodes Scholar class will be announced on Saturday (Nov. 18).The photo of the two twin towers, framed through the darken archway, is All Souls College.“It was really magical,” said Garrett Lam ’16 of one of his first nights at Oxford, when he and a friend found themselves on the grounds of Magdalen, one of 38 constituent colleges at Oxford, feeding chestnuts out of their hands to a herd of deer.Seated on a bench in the well-manicured, walled-in garden of the Rhodes House, the headquarters of the scholarship program, Lam said that Oxford is fascinating for having so many unusual spaces, from Gothic colleges to ornate dining halls to fields where deer laze. “Living at Magdalen College last year, I would open my door every morning, and there were 50 deer grazing on the grassland. It was a wonderful way to begin a day.”Hassaan Shahawy ’16 believes the different pace at Oxford allows more time for soul-searching and late-night talks. He stands in the quad of his college, Pembroke, which was founded in 1624.For Hassaan Shahawy ’16, the scenic wonders are also the perfect backdrop for engrossing discussions. Studying for a D.Phil. in Islamic studies, Shahawy remembered stimulating talks with students while strolling along the Thames on sunny days, while rowboats glided down the gently winding river. He believes that compelling conversations can come easier at Oxford than at Harvard, where the academic pace is more bustling.Enjoying dinner in a teeming downtown Lebanese deli where animated conversation swirled, Shahawy said that while half-hour discussions seemed long in a Harvard dining hall, at Oxford 90-minute talks are common. “My conversations in Oxford have given me the opportunity to really get to understand one person, to understand where they come from, what they think, and why they think that way.”All Souls College provides one of the University of Oxford’s more iconic views.Shahawy said this might be because in many colleges in the U.S. a student’s time is regulated by weekly assignments, frequent exams, and strict reading obligations. At Oxford, he said, the academics are looser: Term papers are not formally graded, and deadlines are rarely enforced. Additionally, final exams are held at the end of a program, which for some students could be at the conclusion of two years of study.Consequently, Shahawy said, Oxford allows more time for soul-searching, late-night talks. He remembers one dinner conversation with fellow Rhodes scholars that posited: Would you rather live forever or die tomorrow? Shahawy said four people said that they would like to live forever, but the other half argued that they would rather die tomorrow because only mortality gives life meaning and value.Grace Huckins ’16 focuses on a combination of neuroscience and women’s studies. Huckins is on famous Turl Street, where some of Oxford’s oldest colleges, including Jesus College and Exeter College, are located.Asked how he answered, Shahawy laughed. “I don’t really remember,” he said, scratching his beard and taking another bite of eggplant. “I think I kind of came out in the middle, but I do know that I enjoyed the conservation — and it wasn’t the only time we had it.”Grace Huckins ’16, focusing on neuroscience and women’s studies, recalled interesting conversations at Oxford, but added that she has also been moved by the important thinkers and shakers who taught or studied there in the past, like Erwin Schrödinger, the Nobel Prize-winning physicist and fellow at Magdalen College in the 1930s. “Having studied physics and admired Schrödinger’s work, I was overwhelmed by the idea that he might have sat and ate in my same college dining hall.”Oxford provides many avenues of interest for Harvard Rhodes Scholars, including the historic and picturesque cobbled Merton Street.A fan of Tolkien’s books since childhood, Huckins said she was also awed when she visited the room in the famed Eagle and Child pub, where Tolkien and Lewis met regularly with fellow writers to give each other feedback on their work starting in the 1930s.“Having experienced something like that, it can’t help but show you what your own read more

Submit Your Best Artificial Intelligence Ideas to Dell EMC AI Challenge

first_img[UPDATE 6/25/18]Congratulations to the finalists!We are pleased to announce our two finalists for the first-ever Dell EMC AI Challenge:Cognitive Scale – AI-based Patient Scheduling AdvisorUniversity of Florida – A Heterogeneous Computing System POC for High Energy PhysicsWe are very excited for them and wish them the very best as they leverage the powerful HPC cluster to showcase their innovative ideas.The winner of the Dell EMC AI Challenge will be announced on November 12 at Super Computing  2018.Itching to solve a technical or business problem using artificial intelligence (AI) technologies like machine learning and deep learning? The Dell EMC AI Challenge is your chance to get noticed—and maybe even get your innovation off the ground through the Dell EMC Global Solution Center.Abstracts and proposals will be accepted through May 31, 2018, and will be reviewed according to the following three criteria:Most innovative use of AI technologyBiggest economic or social impactHighest potential for commercializationAfter careful consideration by a panel of experts—including Michael Jones, senior director of Strategy at Halliburton; Matt Hall, CEO & founder of Agile Scientific; and Matt Grover, principal technical architect at Walmart—five finalists will be selected between June 24 and June 26, 2018. All five finalists will receive exclusive remote access to a Dell EMC HPC and AI Innovation Lab cluster, powered by a Dell EMC PowerEdge servers that include C4140, to prove out their ideas.At the end of September each of the five finalists will complete their testing and prepare a presentation for the judges describing their hypothesis, results achieved, what they learned and what the next steps are.  Following a final round of judging, two awards will be made on November 12 at SC18 https://sc18.supercomputing.org/.The Dell EMC AI Innovation Award will go the entry that demonstrated the highest overall levels of innovation, economic or social impact and commercial potential. The winner will receive 200K core-hour access to a Dell EMC Top 500 Supercomputer and a guest blog on the Dell EMC HPC website, in addition to a spotlight in Dell EMC’s booth at the SC Conference.The Global Industries AI Innovation Award will go to the entry that demonstrates the highest commercial potential in one of Dell EMC’s six global industries—energy, healthcare, video surveillance, automotive, financial services, and manufacturing. The winner of this award will receive a route to commercialization and/or joint go-to-market plan developed jointly with the Dell EMC Global Industries Group, access to Dell EMC Labs for solution testing and validation and will be a featured solution at a relevant industry conference or event.To enter and get more information about the Dell EMC AI Challenge, please visit www.InsideHPC.com/AIChallengeWe’re looking forward to helping you bring your innovative ideas one step closer to reality.NO PURCHASE NECESSARY.  A PURCHASE WILL NOT INCREASE YOUR CHANCES OF WINNING.  MUST BE 18 YEARS OR OLDER.  VOID WHERE PROHIBITED. Contest ends 5/31/18. For Official Rules and prize descriptions visit www.InsideHPC.com/AIChallenge.Sponsor: Dell Marketing, L.P., One Dell Way, Round Rock, TX 78682.last_img

Young Scholars 2018

first_imgPipette, check. Lab coat, check. A sense of scientific curiosity, double check.It’s not your typical gear list for summer camp, but it covers just what Georgia high school students needed while they participated in this summer’s University of Georgia College of Agricultural and Environmental Sciences (CAES) Young Scholars Program.For almost three decades, the CAES Young Scholars Program has paired the college’s researchers with high school students to foster students’ love of science and introduce them to the breadth of study that forms the foundation of agriculture, Georgia’s largest industry.During the Young Scholars Program, students are paid to work as research assistants in laboratories across the college to complete real research projects alongside their faculty mentors.This year’s 59 Young Scholars represent more than 35 high schools from across the state.“Each year, we are pleased with the level of research students are able to accomplish in six weeks,” said Victoria David, director of the CAES Office of Diversity Affairs. “Many Young Scholars alumni who got their initial exposure to science in this program currently work in labs across this campus and in industry.”The students worked in some of the most advanced laboratories on UGA’s Griffin, Tifton and Athens campuses during the six-week program. They assisted in actual research projects led by UGA faculty and, at the end of the program, they presented their findings in a research symposium. Some students may be listed as co-authors on these studies when they are published in academic journals, which is rare for students who have not completed high school.Twelve graduating Young Scholars will have the opportunity to continue their research work when they attend CAES in fall 2018.Doug Bailey, CAES assistant dean for academic affairs, urged all of the Young Scholars gathered for the program’s closing ceremony on July 13 to consider careers in science and to consider starting those careers at CAES.“I hope, again, that you take away the value of science and that science can be fun and so interesting,” Bailey said. “My parting words would be to never stop learning. Keep that energy and enthusiasm that you’ve showed these last six weeks, and you’re just going to have a blast in life.”Promoting science for 29 yearsThe Young Scholars Program began at UGA-Griffin in 1989. The program was originally intended to provide a collegiate experience to students who were not planning to attend college.Since then, the program has expanded to include scientists at UGA-Athens and UGA-Tifton. Students selected for the program are truly ready to engage in real-world research. They are matched to projects of potential interest.Because of this experience, many Young Scholars continue their research careers while attending UGA as students through the college’s undergraduate research program.For more information about the program, visit www.ysp.caes.uga.edu or email David at [email protected] application period for next year’s program will run from October 2018 to January 2019.This year’s Young Scholars:UGA-AthensRobert Anderson, North Oconee High SchoolWalter Avila, Cedar Shoals High SchoolSamantha Ayoub, Jefferson High SchoolCatrina Chamberlain, Woodland High SchoolKasey Daniels, Druid Hills High SchoolMakenzie Driggers, Effingham County High SchoolKristen Dunning, North Paulding High SchoolCole Ehlers, Clarke Central High SchoolKorbin Fears, North Springs Charter SchoolMikayla Frierson, Buford High SchoolMegan Groomes, Collins Hill High SchoolSong Khaing, Cedar Shoals High SchoolMatthew Li, Adlai E. Stevenson High SchoolMarin Lonnee, Oconee County High SchoolBen Mathis, Oglethorpe County High SchoolHaley McMillan, Archer High SchoolAdonis Merritt, Alcovy High SchoolAmi Patel, Dutchtown High SchoolPaul Paterson, North Oconee High SchoolSabar Prasad, North Oconee High SchoolAndres Reyes, North Oconee High SchoolJenny Sanchez, Cedar Shoals High SchoolZaharia Selman, Rockdale Magnet SchoolJordan Shepard, Dutchtown High SchoolPaige Walcott, Prince Avenue Christian SchoolMadison Walker, Grayson High SchoolSkyler Walker-Harris, Ronald E. McNair High SchoolCatherine Wang, Cedar Shoals High SchoolUGA-GriffinWilliam Anong, Starr’s Mill High SchoolSamuel Cross, St. George’s Episcopal SchoolJoshua Duffey, Locust Grove High SchoolAustin Duncan, Whitewater High SchoolTamara English, Dutchtown High SchoolMary Grace Johnson, Flint River AcademyMaddox Jordan, Spalding High SchoolTaaseen Khan, The Heritage SchoolYuheon Lee, McIntosh High SchoolLauren Moyer, Dutchtown High SchoolSheilendria Rawls, Spalding High SchoolMeghan Rogers, CrossPointe Christian AcademyJolie Ryff, Whitewater High SchoolEmily Shi, McIntosh High SchoolMartha Sikora, Spalding High SchoolSarah Smyly, Spalding High SchoolMelanie Wagner, Whitewater High SchoolRobert Wall, Strong Rock Christian SchoolDean Watson, Locust Grove High SchoolCaroline Zhang, McIntosh High read more

6 things #creditunions need to know about Prime Rate changes

first_img 4SHARESShareShareSharePrintMailGooglePinterestDiggRedditStumbleuponDeliciousBufferTumblr Cardholders will get higher interest rates on any outstanding balances, if their FIs choose to increase their rates.FIs may have to pay more when borrowing money to support growth.The Government is impacted by any resulting economic changes such as slowdowns in spending or housing growth.The Economy may dictate future rate changes based on how it responds to current rate changes. continue reading » In mid-December last year, the Federal Reserve raised its Prime Rate from 3.25 percent to 3.5 percent. This was a widely anticipated change many financial institutions (FIs) have already responded to by raising their own interest rates.Consumers and FIs alike can expect to hear more from the Fed in 2016. Already, the Fed is gearing up for additional Prime Rate increases, citing continued economic growth as a catalyst. Some analysts predict as many as four federal rate changes this year. In order to effectively respond to these changes, FIs should know, understand and remember the following six things:Who is affected by Prime Rate increases?last_img