Polarization of radio waves in ice sheets

first_imgThe polarization behaviour of radio waves which have been transmitted and reflected at or near normal incidence in an ice sheet can be explained if the ice is assumed to be a uniaxial birefringent material. Equations are derived for describing the change in polarization for the experimental conditions usually encountered when sounding ice sheets. One of the initial unknowns which can be found is the direction of the effective optic axis which determines the basic reference frame. Other parameters which can be found and related to the physical nature of the ice and reflecting surface are the total phase shift between the ordinary and extraordinary rays and their relative amplitude. The operation of several different types of polarimeter is discussed in order to compare the amount and the quality of information which can be obtained for various degrees of complexity in equipment and technique.last_img read more

National demonstration for free education planned

first_imgA national demonstration in favour of free education has been called for Wednesday 19 November in central London. The protestors aim to demonstrate their opposition to tuition fees and steps towards privatisation in education.   Occupations and other forms of local action are also being planned to occur in conjunction with the demonstration.The protest seeks to bring together a coalition of student groups and campaigns from across the country.  Amongst the groups that have so far come out in support of the protest are the National Campaign Against Fees and Cuts (NCAFC), the Student Assembly Against Austerity, the Young Greens, as well as some local university campus groups, such as Defend Education Birmingham.The planned demonstration follows the National Union of Students passing a motion in support of free education, at its annual conference in Liverpool in April.Beth Redmond of the NCAFC said, “Four years on from the election of the Coalition, it is clear that fees have failed. Whole areas of higher and further education are now off limits to anyone without rich parents, and education workers are being squeezed, sacked and outsourced. We are calling this demonstration to take the fight to the government and to demand a public education system that serves society and is free and accessible to everyone.”James Elliott, a student at St Edmund Hall and member of the NCAFC National Committee, said, “Oxford students should have every reason to attend what could be one of the biggest demonstrations since 2010. Given our Vice-Chancellor’s appetite for £16,000 fees while cutting his cleaners’ pay packets, we should join with the rest of the student movement and demand an education system that is free, public and democratic.”Oxford Activist Network member Xavier Cohen said, “I expect that the Oxford Activist Network will overwhelmingly vote to support this demonstration and campaign in common rooms for funding for transport so that Oxford students can protest en masse for free education.”MASSIVE NEWS: a coalition of groups is calling a NATIONAL DEMO FOR FREE EDUCATION on November 19th…. http://t.co/jLxR1PxQ5K— Against Fees & Cuts (@NCAFC_UK) July 2, 2014last_img read more

Faculty Academy: A hands-on experience in innovative teaching for faculty

first_imgThe Office of the Vice Provost for Advances in Learning is sponsoring a pilot program called the Faculty Academy to enable full-time Harvard faculty to get hands-on assistance with some of the techniques and concepts used in online learning experiences (such as those created through HarvardX) and in blended or flipped classrooms.Topics covered include video and visual teaching; online comprehension and assessment; and blended learning. Classes are offered on Thu., July 24 and Tue., Aug. 12 and are supported by HarvardX and the Bok Center for Teaching and Learning. Faculty are invited to sign up for a half day slot focused on one of three topics. There are six total slots available each month, two per topic.Slots are available for individual faculty signup on a first-come, first-served basis, and we will maintain a wait list of two faculty per slot. Slots that have not been reserved by faculty one week prior to the date of the academy will be made available to senior graduate students who are teaching in the following academic term.  Read Full Storylast_img read more

Hitting the Accelerator with GPUs

first_imgAs organizations work to meet the performance demands of new data-intensive workloads, accelerated computing is gaining momentum in mainstream data centers.As data center operators struggle to stay ahead of a growing deluge of data while supporting new data-intensive applications, there’s a growing demand for systems that incorporate graphics processing units (GPUs). These accelerators, which complement the capabilities of CPUs at the heart of the system, use parallel processing to churn through large volumes of data at blazingly fast speeds.For years, organizations have used accelerators to rev up graphically intensive applications, such as those for visualization, modeling and simulation. But today, the use cases for accelerators are growing far beyond the typical acceleration targets to more mainstream applications. In particular, accelerators can now be one of the keys to speeding up artificial intelligence, machine learning and deep learning applications, including both training and inferencing workloads, along with applications for predictive analytics, real-time analysis of data streaming in from the Internet of Things (IoT), and more. In fact, NVIDIA® GPUs can accelerate ~600 applications.So what’s the big advantage of an accelerator? Here’s a quick look at how GPUs rev up performance by working with the CPU to take a divide-and-conquer approach to get results faster: A GPU typically has thousands of cores designed for efficient execution of mathematical functions. Portions of a workload are offloaded from the CPU to the GPU, while the remainder of the code runs on the CPU, improving overall application performance.Accelerated servers from Dell EMCIf you’re just getting started with AI, machine or deep learning, or if you just want a screaming fast 2-CPU Tower server, check out the PowerEdge T640. You can put up to 4 GPUs inside this powerhouse, and it fits right under your desk! It has plenty of internal storage capacity with up to 32x 2.5” hard drives, and you can connect all your tech with those 8 PCIe slots. (I’m thinking that something like this could improve team online gaming performance.)Beyond my personal wish-list, the PowerEdge T640 is rackable, and you can virtualize and share those GPUs with VMware vSphere, or with Bitfusion software to provide boosted virtual desktop infrastructure (VDI), artificial intelligence and/or other testing and development workspaces.For those serious about databases and data analytics, check out the PowerEdge R940xa. The PowerEdge R940xa server combines 4 CPUs with 4 GPUs for a 1:1 ration to drive database acceleration. With up to 6TB of memory, this server is a beast that can grow with your data.If you’re not sure what to pick, you can’t go wrong with the popular PowerEdge R740 (Intel) or PowerEdge R7425 (AMD) with 2 CPUs and up to 3 heavy-weight NVIDIA® V100 GPUs or 6 lightweight NVIDIA® T4 GPUs. In the PowerEdge R7425, you can make great use of all those x16 lanes. Why look at lanes? The vast majority of GPUs plug into a PCIe slot inside a server. PCIe communication/information is carried over the lanes in packets. More lanes means more data packets can travel at the same time, and the result can be faster.Dive into the good-better-best options by workload in this new Dell EMC and NVIDIA ebook.In addition to PowerEdge servers, Dell EMC has a growing portfolio of accelerated solutions. At a glance, Dell EMC Ready Solutions for HPC and AI make it faster and simpler for your organization to adopt high-performance computing. They offer a choice of flexible and scalable high performance computing solutions, with servers, networking, storage, solutions and services optimized together for use cases in a variety of industries.The big point here is that your organization now has ready access to the accelerated-optimized and pre-integrated solutions you need to power your most data-intensive and performance-hungry workloads. So let’s get started!To learn moreTo find the accelerator-optimized systems that are right for your organization, check out these resources:A new eBook from Dell EMC and NVIDIA — “Turbocharge Your Applications” — explores use cases for different GPU-optimized workloads and provides recommendations for specific Dell EMC PowerEdge servers for task at hand, in a “good, better, best” format.Visit http://www.dellemc.com/servers and http://www.dellemc.com/accelerators for more detail. Join the conversation on Twitter @DellEMCServers.last_img read more

Lin-Manuel Miranda Talks EGOT Dreams, Mary Poppins & More

first_img Hamilton mastermind Lin-Manuel Miranda is back in the States! The recent Oscar nominee stopped by The Ellen DeGeneres Show on February 13 to discuss the possibility of EGOT-ing at the Oscars on February 26, what it’s been like filming Mary Poppins Returns with Emily Blunt and his parents’ (ahem) special relationship to Gloria Gaynor’s disco hit “I Will Survive.” Let’s just say we feel a lot closer to the Miranda clan now—perhaps a little too close. All the same, it’s good to have Miranda and his shenanigans stateside, even for a quick interview. Take a look at the hilarious clip below! Lin-Manuel Miranda View Commentslast_img read more

NextEra: Gas-fired peaker plants cannot compete with new battery storage resources

first_img FacebookTwitterLinkedInEmailPrint分享S&P Global Market Intelligence ($):As part of NextEra Energy Inc.’s continued embrace of disruption in the utility sector, executives during the company’s investor day laid out a bullish view on pricing and demand for renewable power paired with storage through 2022.The Florida-headquartered company estimates it will install between 20,000MW and 23,000MW of wind capacity and 9,000MW and 13,000MW of solar capacity by 2022, including assets owned and operated by competitive generation division NextEra Energy Resources LLC. Executives expect NextEra will have up to 2,000MW of storage deployed by then as well.“There is enormous change coming in this industry. I don’t think the industry really has come to grips with it,” NextEra Energy Chairman, President and CEO Jim Robo said June 20. “And we’re at the leading edge, and it is going to help drive tremendous growth to this company over the next decade.”According to Robo, the rapid growth of wind and solar in the market has been among the industry’s biggest game-changers, and one that almost everyone failed to recognize early on. While renewable tax credits might be extended, NextEra executives are betting wind and solar plus storage will be cheaper than existing coal and most existing nuclear after the early 2020s, when current federal subsidies are gone.NextEra’s decarbonization strategy includes natural gas pipelines and gas-fired plants, including the Mountain Valley Pipeline LLC in which the company owns a stake, and Florida Power & Light Co.’s FPL Dania Beach Clean Energy Center. NextEra plans to deploy between $6.3 billion and $6.9 billion for gas pipelines by 2022. Robo said the opposition to gas is surprising, because gas pipelines have enabled coal plant shutdowns and large emission reductions.However, the company takes a more bearish view on gas-fired peakers; NextEra Energy Resources President and CFO John Ketchum said management sees peakers being “cannibalized” by renewables, especially as battery storage’s manufacturing becomes more efficient and costs decline.More ($): NextEra sees batteries displacing gas-fired peakers, otherwise bullish on gas NextEra: Gas-fired peaker plants cannot compete with new battery storage resourceslast_img read more

Huntington Station Fire Kills Woman, Daughter

first_imgSign up for our COVID-19 newsletter to stay up-to-date on the latest coronavirus news throughout New York A 64-year-old woman and her 29-year-old daughter died when their Huntington Station house caught fire late Thursday night, Suffolk County police said.Officers and Huntington Manor firefighters responded the blaze on 4th Avenue, which 29-year-old Joseph Martinez escaped from a basement window at 11:42 p.m., police said.His mother, Reyna Paris, and sister, Rosemarie Martinez, who had Down syndrome, were found in separate bedrooms on the second floor.All three were taken to Huntington Hospital, where Paris and her daughter were pronounced dead. Joseph was treated for minor injuries.Multiple fire departments responded to assist Huntington Manor firefighters in extinguishing the blaze, which was complicated by the fact that the house was extremely cluttered, police said.Homicide and Arson Squad detectives are continuing the investigation, but the cause of the fire has not been determined.Anyone with information about this fire is asked to call the Homicide Squad at 631-852-6392 or anonymously to Crime Stoppers at 1-800-220-TIPS. All calls will remain confidential.last_img read more

Beijing converts Hong Kong hotel into new national security office

first_imgThe law puts mainland security agents in Hong Kong for the first time with powers to investigate and prosecute national security crimes and allows extradition to the mainland for trial in courts controlled by the Communist Party.Beijing imposed the law on its freest city last week, pushing the former British colony on to a more authoritarian path and drawing condemnation from some Western governments, lawyers and rights groups.Critics of the law fear it will crush coveted freedoms in the Chinese-ruled city, while supporters say it will bring stability after a year of sometimes violent protests that plunged the city into its biggest crisis in decades.Topics : Beijing opened its new national security office in Hong Kong on Wednesday, turning a hotel in the bustling shopping and commercial district of Causeway Bay into its new headquarters.The office will oversee the Hong Kong government’s enforcement of Beijing’s sweeping national security legislation that will punish acts of secession, subversion, terrorism and collusion with foreign forces with up to life in prison.The office’s chief, Zhang Yanxiong, and Hong Kong leader Carrie Lam attended the opening ceremony at the former Metropark Hotel, which offers views across the city’s Victoria Harbor.last_img read more

Room for pension fund investment in EU project bonds, says EIB

first_img“The dominant buyers were insurers, so there is room for pension funds to scale up,” he told delegates at the PensionsEurope conference in Frankfurt.He hinted that the next project bond might be for a project in the UK but did not give any further details.Pierre Bollon, vice chair at PensionsEurope in charge of long-term investments, noted the association was currently working on the proposed regulation on long-term financing and suggested it should be made “less rigid and hence more attractive, especially for small and medium-sized occupational pension schemes”.This week the European parliament issued a draft legislative proposal on the European long-term investment funds (ELTIF) proposals, backing the Commission’s suggestion to create such funds under the AIFM directive.According to figures collected by the EIB around 1% of assets held by sovereign wealth funds, pension funds and insurers globally was currently invested in infrastructure.At the conference, the UK’s Pensions Infrastructure Platform (PIP) received a positive reception, with a representative of the Belgian pension fund association in the audience asking Judith Donnelly, working at the UK infrastructure project, whether it was also open to foreign investors.Donnelly noted the PIP currently had ten of the largest UK pension schemes as committed investors, with an initial target capital raise of £1bn.The fund’s founding investors include the British Airways and the Railways pension funds, the Pension Protection Fund (PPF), the London Pension Fund Authority (LPFA), BAE Systems, The West Midlands Pension Fund and the pension fund of BT.“PIP would have no objection in principle to include further investors if the existing investors cannot meet the target size but we do not want to expand the investment target,” she explained.Matti Leppälä, director general of PensionsEurope, pointed out while the association generally “welcomed the initiative on investments in growth and employment” they should any commitments should only be made “for the right reasons”.“Overall, the total costs may be too high and increased capital requirements may altogether prevent these envisaged investments,” he said, referencing the impact of future changes to solvency requirements for pension funds. The European Union’s next project bond issuance could offer funding to an undisclosed project in the UK, according to the director general of the European Investment Bank (EIB).In 2010, the president of the European Commission Jose Manuel Barroso announced plans to issue project bonds to attract institutional investors to long-term investment projects.The first project bond was launched in October, offering funding for a Castor gas storage project in Spain.According to Bertrand de Mazières, director general of the EIB, the bond issue, with a volume of €1.4bn and a 2034 maturity, was oversubscribed and attracted a “very strong” response from investors.last_img read more

Temporary Deviation to Support Kissimmee River Restoration Gets OK

first_imgThe U.S. Army Corps of Engineers’ Jacksonville District has just announced the approval of a planned temporary deviation to the 1981 Lake Kissimmee, Hatchineha and Cypress Interim Regulation Schedule.Major General Diana Holland, Commander of the U.S. Army Corps of Engineers, South Atlantic Division, approved the planned deviation to raise the regulation schedule to facilitate Kissimmee River Restoration Project (KRRP) construction through June 1, 2021.“Completing construction on the Kissimmee River Restoration Project is a priority for the Jacksonville District,” said Tim Gysan, Senior Project Manager. “Receiving the approval for this planned temporary deviation gives us flexibility as we work to maintain the on-site conditions required for our contractors to continue their work at multiple construction locations simultaneously.”Remaining construction includes Kissimmee River backfill and the S-69 U-shaped weir completion. Lake Kissimmee, Hatchineha, and Cypress are regulated by a single structure, S-65, located at the outlet of Lake Kissimmee. S-65 is a spillway located at the head of the C-38 canal.The intent of the planned temporary deviation is to limit Lake Kissimmee releases to no more than 900 cubic feet per second (cfs) in order to facilitate KRR construction in Reach 2 and Reach 3, which are located south of the Kissimmee River junction with the Istokpoga Canal.The planned temporary deviation provides operational flexibility to the South Florida Water Management District, increasing the likelihood of providing flows within the optimum range for Corps construction.Image source: USACElast_img read more