Sample records for nasa fermi website
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Twelve Years of Education and Public Outreach with the Fermi Gamma-ray Space Telescope
Cominsky, Lynn R.; McLin, K. M.; Simonnet, A.; Fermi E/PO Team
2013-04-01
During the past twelve years, NASA's Fermi Gamma-ray Space Telescope has supported a wide range of Education and Public Outreach (E/PO) activities, targeting K-14 students and the general public. The purpose of the Fermi E/PO program is to increase student and public understanding of the science of the high-energy Universe, through inspiring, engaging and educational activities linked to the mission’s science objectives. The E/PO program has additional more general goals, including increasing the diversity of students in the Science, Technology, Engineering and Mathematics (STEM) pipeline, and increasing public awareness and understanding of Fermi science and technology. Fermi's multi-faceted E/PO program includes elements in each major outcome category: ● Higher Education: Fermi E/PO promotes STEM careers through the use of NASA data including research experiences for students and teachers (Global Telescope Network), education through STEM curriculum development projects (Cosmology curriculum) and through enrichment activities (Large Area Telescope simulator). ● Elementary and Secondary education: Fermi E/PO links the science objectives of the Fermi mission to well-tested, customer-focused and NASA-approved standards-aligned classroom materials (Black Hole Resources, Active Galaxy Education Unit and Pop-up book, TOPS guides, Supernova Education Unit). These materials have been distributed through (Educator Ambassador and on-line) teacher training workshops and through programs involving under-represented students (after-school clubs and Astro 4 Girls). ● Informal education and public outreach: Fermi E/PO engages the public in sharing the experience of exploration and discovery through high-leverage multi-media experiences (Black Holes planetarium and PBS NOVA shows), through popular websites (Gamma-ray Burst Skymap, Epo's Chronicles), social media (Facebook, MySpace), interactive web-based activities (Space Mysteries, Einstein@Home) and activities by
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are available to the public, along with standard analysis software, from NASA's Fermi Science Support Center. For general questions about Fermi, Fermi science, or Fermi classroom materials, please contact Fermi has its own music: a prelude and a symphony. Gamma Ray Bursts trasformed into visual music
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NASA
2009-01-01
1. This view from NASA's Fermi Gamma-ray Space Telescope is the deepest and best-resolved portrait of the gamma-ray sky to date. The image shows how the sky appears at energies more than 150 million times greater than that of visible light. Among the signatures of bright pulsars and active galaxies is something familiar -- a faint path traced by the sun. (Credit: NASA/DOE/Fermi LAT Collaboration) 2. The Large Area Telescope (LAT) on Fermi detects gamma-rays through matter (electrons) and antimatter (positrons) they produce after striking layers of tungsten. (Credit: NASA/Goddard Space Flight Center Conceptual Image Lab)
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Technical Information/Website Preservation
PintoRey, Christian R.
2010-01-01
This document reviews the work of the author in NASA's Motivating Undergraduates in Science and Technology (MUST) internship. The intern worked on the Space Shuttles hydraulic systems (i.e., Auxiliary Power Units (APU's) and Hydraulic Pump Units (HPU's)), and website preservation of the hydraulic technology captured in websites relating to the coming.the Space Shuttle Retirement. Several figures and pictures show an overview of the orbiter's hydraulic systems
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Noll, C.; Lee, L.; Torrence, M.
2011-01-01
The International Laser Ranging Service (ILRS) website, http://ilrs.gsfc.nasa.gov, is the central source of information for all aspects of the service. The website provides information on the organization and operation of ILRS and descriptions of ILRS components, data, and products. Furthermore, the website and provides an entry point to the archive of these data and products available through the data centers. Links are provided to extensive information on the ILRS network stations including performance assessments and data quality evaluations. Descriptions of supported satellite missions (current, future, and past) are provided to aid in station acquisition and data analysis. The current format for the ILRS website has been in use since the early years of the service. Starting in 2010, the ILRS Central Bureau began efforts to redesign the look and feel for the website. The update will allow for a review of the contents, ensuring information is current and useful. This poster will detail the proposed design including specific examples of key sections and webpages.
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Foster, Cyrus; Jaroux, Belgacem A.
2012-01-01
The Trajectory Browser is a web-based tool developed at the NASA Ames Research Center to be used for the preliminary assessment of trajectories to small-bodies and planets and for providing relevant launch date, time-of-flight and V requirements. The site hosts a database of transfer trajectories from Earth to asteroids and planets for various types of missions such as rendezvous, sample return or flybys. A search engine allows the user to find trajectories meeting desired constraints on the launch window, mission duration and delta V capability, while a trajectory viewer tool allows the visualization of the heliocentric trajectory and the detailed mission itinerary. The anticipated user base of this tool consists primarily of scientists and engineers designing interplanetary missions in the context of pre-phase A studies, particularly for performing accessibility surveys to large populations of small-bodies. The educational potential of the website is also recognized for academia and the public with regards to trajectory design, a field that has generally been poorly understood by the public. The website is currently hosted on NASA-internal URL http://trajbrowser.arc.nasa.gov/ with plans for a public release as soon as development is complete.
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7th International Fermi Symposium
2017-10-01
The two Fermi instruments have been surveying the high-energy sky since August 2008. The Large Area Telescope (LAT) has discovered more than three thousand gamma-ray sources and many new source classes, bringing the importance of gamma-ray astrophysics to an ever-broadening community. The LAT catalog includes supernova remnants, pulsar wind nebulae, pulsars, binary systems, novae, several classes of active galaxies, starburst galaxies, normal galaxies, and a large number of unidentified sources. Continuous monitoring of the high-energy gamma-ray sky has uncovered numerous outbursts from a wide range of transients. Fermi LAT's study of diffuse gamma-ray emission in our Galaxy revealed giant bubbles, as well as an excess of gamma-rays from the Galactic center region, both observations have become exciting puzzles for the astrophysics community. The direct measurement of a harder-than- expected cosmic-ray electron spectrum may imply the presence of nearby cosmic-ray accelerators. LAT data have provided stringent constraints on new phenomena such as supersymmetric dark-matter annihilations as well as tests of fundamental physics. The full reprocessing of the entire mission dataset with Pass 8 includes improved event reconstruction, a wider energy range, better energy measurements, and significantly increased effective area, all them boosting the discovery potential and the ability to do precision observations with LAT. The Gamma-ray Burst Monitor (GBM) continues to be a prolific detector of gamma-ray transients: magnetars, solar flares, terrestrial gamma-ray flashes and gamma-ray bursts at keV to MeV energies, complementing the higher energy LAT observations of those sources in addition to providing valuable science return in their own right. All gamma-ray data are made immediately available at the Fermi Science Support Center (http://fermi.gsfc.nasa.gov/ssc). These publicly available data and Fermi analysis tools have enabled a large number of important studies. We
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2009-01-01
In only 10 months of scientific activity, the Fermi space observatory has already collected an unprecedented wealth of information on some of the most amazing objects in the sky. In a recent talk at CERN, Luca Latronico, a member of the Fermi collaboration, explained some of their findings and emphasized the strong links between High Energy Physics (HEP) and High Energy Astrophysics (HEA). The Fermi gamma-ray telescope was launched by NASA in June 2008. After about two months of commissioning it started sending significant data back to the Earth. Since then, it has made observations that are changing our view of the sky: from discovering a whole new set of pulsars, the greatest total energy gamma-ray burst ever, to detecting an unexplained abundance of high-energy electrons that could be a signature of dark matter, to producing a uniquely rich and high definition sky map in gamma-rays. The high performance of the instrument comes as ...
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Magnetar Observations with Fermi/GBM
Kouveliotou, Chryssa
2009-01-01
NASA's Fermi Observatory was launched June 11, 2009; the Fermi Gamma Ray Burst Monitor (GBM) began normal operations on July 14, about a month after launch, when the trigger algorithms were enabled. In the first year of operations we recorded emission from four magnetar sources; of these, only one was an old magnetar: SGR 1806+20. The other three detections were: SGR J0501+4516, newly discovered with Swift and extensively monitored with both Swift and GBM, SGR J1550-5418, a source originally classified as an Anomalous X-ray Pulsar (AXP) and a very recently discovered new source, SGR 0418+5729. I report below on the current status of the analyses efforts of the GBM data.
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A Mobile Data Application for the Fermi Mission
Stephens, Thomas E.; Science Support Center, Fermi
2014-01-01
With the ever increasing use of smartphones and tablets among scientists and the world at large, it becomes increasingly important for projects and missions to have mobile friendly access to their data. This access could come in the form of mobile friendly websites and/or native mobile applications that allow the users to explore or access the data. The Fermi Gamma-ray Space Telescope mission has begun work along the latter path. In this poster I present the current version of the Fermi Data Portal, a native mobile application for both Android and iOS devices that allows access to various high level public data products from the Fermi Science Support Center (FSSC), the Gamma-ray Coordinate Network (GCN), and other sources. While network access is required to download data, most of the data served by the app are stored locally and are available even when a network connection is not available. This poster discusses the application's features as well as the development experience and lessons learned so far along the way.
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One NASA: Sharing Knowledge Through an Agency-wide Process Asset Library (PAL)
Truss, Baraka J.
2006-01-01
This poster session will cover the key purpose and components behind implementing the NASA PAL website. This session will present the current results, describing the process used to create the website, the current usage measure, and will demonstrate how NASA is truly becoming ONE. The target audience for the poster session includes those currently implementing the CMMI model and looking for PAL adoption techniques. To continue to be the leader in space, science and technology, NASA is using this agency-wide PAL to share knowledge, work products and lessons learned through this website. Many organizations have failed to recognize how the efforts of process improvement fit into overall organizational effort. However, NASA as an agency has adopted the benefits of process improvement by the creation of this website to foster communication between its ten centers. The poster session will cover the following, topics outlined below: 1) Website purpose; 2) Characteristics of the website; 3) User accounts status; 4) Website content size; and 5) Usage percentages.
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Meneses, Joseph Chistopher
2012-01-01
NASA's Space Place team publishes engaging content and creates an effective environment to inspire a young audience to dare mighty things. NASA uses the Space Place, Climate Kids, and SciJinks websites to cultivate interest among elementary-school-aged children in both science and technology. During my summer internship at Jet Propulsion Laboratory I used Adobe Flash and ActionScript 3 to develop content for the Space Place, Climate Kids, and SciJinks sites. In addition, I was involved in the development process for ongoing and new projects during my internship. My involvement allowed me to follow a project from concept to design, implementation, and release. I personally worked on three projects this summer, two of which are currently in deployment. The first is a scrambled letter-tile guessing game titled Solar System Scramble. The second, Butterfrog Mix-Up, is a rotating-tile puzzle game. The third project is a unfinished prototype for a maze game.
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Fermi/GBM Results of Magnetars
Kouveliotou, chryssa
2011-01-01
Magnetars are magnetically powered rotating neutron stars with extreme magnetic fields (over 10(exp 14) Gauss). They were discovered in the X- and gamma-rays where they predominantly emit their radiation. Very few sources (roughly 18) have been found since their discovery in 1987. NASA's Fermi Gamma-ray Space Telescope was launched June 11,2009; since then the Fermi Gamma-ray Burst Monitor (GBM) recorded emission from four magnetar sources. Two of these were brand new sources, SGR J0501 +4516, discovered with Swift and extensively monitored with Swift and GBM, SGR J0418+5729, discovered with GBM and the Interplanetary Network (IPN). A third was SGR Jl550-5418, a source originally classified as an Anomalous X-ray Pulsar (AXP IEI547.0-5408), but exhibiting a very prolific outburst with over 400 events recorded in January 2009. In my talk I will give a short history of magnetars and describe how this, once relatively esoteric field, has emerged as a link between several astrophysical areas including Gamma-Ray Bursts. Finally, I will describe the exciting new results of Fermi in this field and the current status of our knowledge of the magnetar population properties and magnetic fields.
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Fermi Large Area Telescope Operations: Progress Over 4 Years
Energy Technology Data Exchange (ETDEWEB)
Cameron, Robert A.; /SLAC
2012-06-28
The Fermi Gamma-ray Space Telescope was launched into orbit in June 2008, and is conducting a multi-year gamma-ray all-sky survey, using the main instrument on Fermi, the Large Area Telescope (LAT). Fermi began its science mission in August 2008, and has now been operating for almost 4 years. The SLAC National Accelerator Laboratory hosts the LAT Instrument Science Operations Center (ISOC), which supports the operation of the LAT in conjunction with the Mission Operations Center (MOC) and the Fermi Science Support Center (FSSC), both at NASA's Goddard Space Flight Center. The LAT has a continuous output data rate of about 1.5 Mbits per second, and data from the LAT are stored on Fermi and transmitted to the ground through TDRS and the MOC to the ISOC about 10 times per day. Several hundred computers at SLAC are used to process LAT data to perform event reconstruction, and gamma-ray photon data are subsequently delivered to the FSSC for public release with a few hours of being detected by the LAT. We summarize the current status of the LAT, and the evolution of the data processing and monitoring performed by the ISOC during the first 4 years of the Fermi mission, together with future plans for further changes to detected event data processing and instrument operations and monitoring.
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Huh, Jisu; Shin, Wonsun
2014-01-01
Direct-to-consumer (DTC) prescription drug brand websites, as a form of DTC advertising, are receiving increasing attention due to the growing number and importance as an ad and a consumer information source. This study examined consumer trust in a DTC website as an important factor influencing consumers' attitude toward the website and behavioral intention. Applying the conceptual framework of website trust, the particular focus of investigation was the effect of the website trust cue factor on consumers' perceived DTC website trust and subsequent attitudinal and behavioral responses. Results show a significant relation between the website trust cue factor and consumers' perceived DTC website trust. Perceived DTC website trust, in turn, was found to be significantly associated with consumers' attitude toward the DTC website and behavioral intention.
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The Archived Website and Website Philology
DEFF Research Database (Denmark)
Brügger, Niels
2008-01-01
characterizing the archiving of other types of traces of human activity, including other media types. The primary problem is that the actual act of finding, collecting and preserving changes the website that was on the live web in a number of ways, thus creating a unique version of it and not simply a copy......Website history can be considered an emerging discipline at the intersection between media history and Internet history. In this discipline, the individual website is regarded as the unifying entity of the historical analysis rather than the Internet or the Web. Writing the history of a website...
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Leverage Website Favicon to Detect Phishing Websites
Directory of Open Access Journals (Sweden)
Kang Leng Chiew
2018-01-01
Full Text Available Phishing attack is a cybercrime that can lead to severe financial losses for Internet users and entrepreneurs. Typically, phishers are fond of using fuzzy techniques during the creation of a website. They confuse the victim by imitating the appearance and content of a legitimate website. In addition, many websites are vulnerable to phishing attacks, including financial institutions, social networks, e-commerce, and airline websites. This paper is an extension of our previous work that leverages the favicon with Google image search to reveal the identity of a website. Our identity retrieval technique involves an effective mathematical model that can be used to assist in retrieving the right identity from the many entries of the search results. In this paper, we introduced an enhanced version of the favicon-based phishing attack detection with the introduction of the Domain Name Amplification feature and incorporation of addition features. Additional features are very useful when the website being examined does not have a favicon. We have collected a total of 5,000 phishing websites from PhishTank and 5,000 legitimate websites from Alexa to verify the effectiveness of the proposed method. From the experimental results, we achieved a 96.93% true positive rate with only a 4.13% false positive rate.
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Leverage Website Favicon to Detect Phishing Websites
Kang Leng Chiew; Jeffrey Soon-Fatt Choo; San Nah Sze; Kelvin S. C. Yong
2018-01-01
Phishing attack is a cybercrime that can lead to severe financial losses for Internet users and entrepreneurs. Typically, phishers are fond of using fuzzy techniques during the creation of a website. They confuse the victim by imitating the appearance and content of a legitimate website. In addition, many websites are vulnerable to phishing attacks, including financial institutions, social networks, e-commerce, and airline websites. This paper is an extension of our previous work that leverag...
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Redesigning NASA Earthdata to Become Powered by EOSDIS Components
Bagwell, R.; Siarto, J.; Wong, M. M.; Murphy, K. J.; McLaughlin, B. D.
2014-12-01
Two years ago, NASA's Earth Science Data and Information Systems (ESDIS) Project launched the Earthdata website (https://earthdata.nasa.gov) in order to make Earth Observing System Data and Information System (EOSDIS) data, data products, data tools, and services available to a broad range of user communities across Earth science disciplines to foster collaboration and learning amongst the communities. Earthdata is being redesigned to be the one-stop shop in providing Earth science data, services, and information to the Earth science community. The goal is to move from the current static, manually-intensive content format to a dynamic, data-driven website in order to provide a more flexible and usable design website infrastructure that leverages EOSDIS components such as the User Registration System (URS), the Common Metadata Repository (CMR) and the Global Imagery Browse Services (GIBS). This will reorganize information content to make the website easier to use and to make easily accessible the high-value Earth science content throughout the site. The website will also easily accept and incorporate upcoming new projects such as the Earthdata Search Client and the Sea Level Change Portal.
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Magnetar Observations in the Swift-Fermi/GBM Era
Kouveliotou, Chryssa
2010-01-01
NASA's Fermi Observatory was launched June 11, 2008; the Fermi Gamma Ray Burst Monitor (GBM) began normal operations on July 14, about a month after launch, when the trigger algorithms were enabled. Since then, and against all odds, GBM recorded over 600 bursts from 4 SGRs. Of these four sources, only one was an old magnetar: SGR J1806+20. SGR J0501+4516, was discovered with Swift and extensively monitored with GBM. A source originally classified as AXP 1E1547.0-5408 exhibited SGR-like bursting behavior and we reclassified it as SGR J1550-5418. Finally, GBM discovered SGR J0418+5729 on 2009 June. Finally, on March 2010, a third new magnetar was discovered with Swift, SGR J1833-0832. I report below on the current status of the field and on several results combining multi-satellite and ground-based data
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The Fermi Gamma-ray Burst Monitor (GBM) Terrestrial Gamma-ray Flash (TGF) Catalog
Briggs, M. S.; Roberts, O.; Fitzpatrick, G.; Stanbro, M.; Cramer, E.; Mailyan, B. G.; McBreen, S.; Connaughton, V.; Grove, J. E.; Chekhtman, A.; Holzworth, R.
2017-12-01
The revised Second Fermi GBM TGF catalog includes data on 4144 TGFs detected by the Fermi Gamma-ray Burst Monitor through 2016 July 31. The catalog includes 686 bright TGFs there were detected in orbit and 4135 TGFs that were discovered by ground analysis of GBM data (the two samples overlap). Thirty of the events may have been detected as electrons and positrons rather than gamma-rays: Terrestrial Electron Beams (TEBs). We also provide results from correlating the GBM TGFs with VLF radio detections of the World Wide Lightning Location Network (WWLLN). TGFs with WWLLN associations have their localization uncertainties improved from 800 to 10 km, making it possible to identify specific thunderstorms responsible for the TGFs and opening up new types of scientific investigations. There are 1544 TGFs with WWLLN associations; maps are provided for these and the other TGFs of the catalog. The data tables of the catalog are available for use by the scientific community at the Fermi Science Support Center, at https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/tgf/.
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Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education. E Fermi. Articles written in Resonance – Journal of Science Education. Volume 19 Issue 1 January 2014 pp 82-96 Classics. Quantization of an Ideal Monoatomic Gas · E Fermi · More Details Fulltext PDF ...
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NASA Science Engagement Through "Sky Art"
Bethea, K. L.; Damadeo, K.
2013-12-01
Sky Art is a NASA-funded online community where the public can share in the beauty of nature and the science behind it. At the center of Sky Art is a gallery of amateur sky photos submitted by users that are related to NASA Earth science mission research areas. Through their submissions, amateur photographers from around the world are engaged in the process of making observations, or taking pictures, of the sky just like many NASA science instruments. By submitting their pictures and engaging in the online community discussions and interactions with NASA scientists, users make the connection between the beauty of nature and atmospheric science. Sky Art is a gateway for interaction and information aimed at drawing excitement and interest in atmospheric phenomena including sunrises, sunsets, moonrises, moonsets, and aerosols, each of which correlates to a NASA science mission. Educating the public on atmospheric science topics in an informal way is a central goal of Sky Art. NASA science is included in the community through interaction from scientists, NASA images, and blog posts on science concepts derived from the images. Additionally, the website connects educators through the formal education pathway where science concepts are taught through activities and lessons that align with national learning standards. Sky Art was conceived as part of the Education and Public Outreach program of the SAGE III on ISS mission. There are currently three other NASA mission involved with Sky Art: CALIPSO, GPM, and CLARREO. This paper will discuss the process of developing the Sky Art online website, the challenges of growing a community of users, as well as the use of social media and mobile applications in science outreach and education.
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Enrico Fermi exhibition at CERN
2002-01-01
A touring exhibition celebrating the centenary of Enrico Fermi's birth in 1901 will be on display at CERN (Main Building, Mezzanine) from 12-27 September. You are cordially invited to the opening celebration on Thursday 12 September at 16:00 (Main Building, Council Chamber), which will include speechs from: Luciano Maiani Welcome and Introduction Arnaldo Stefanini Celebrating Fermi's Centenary in Documents and Pictures Antonino Zichichi The New 'Centro Enrico Fermi' at Via Panisperna Ugo Amaldi Fermi at Via Panisperna and the birth of Nuclear Medicine Jack Steinberger Fermi in Chicago Valentin Telegdi A Close-up of Fermi and the screening of a documentary video about Fermi: Scienziati a Pisa: Enrico Fermi (Scientists at Pisa: Enrico Fermi) created by Francesco Andreotti for La Limonaia from early film, photographs and sound recordings (In Italian, with English subtitles - c. 30 mins). This will be followed by an aperitif on the Mezz...
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Science@NASA: Direct to People!
Koczor, Ronald J.; Adams, Mitzi; Gallagher, Dennis; Whitaker, Ann (Technical Monitor)
2002-01-01
Science@NASA is a science communication effort sponsored by NASA's Marshall Space Flight Center. It is the result of a four year research project between Marshall, the University of Florida College of Journalism and Communications and the internet communications company, Bishop Web Works. The goals of Science@NASA are to inform, inspire, and involve people in the excitement of NASA science by bringing that science directly to them. We stress not only the reporting of the facts of a particular topic, but also the context and importance of the research. Science@NASA involves several levels of activity from academic communications research to production of content for 6 websites, in an integrated process involving all phases of production. A Science Communications Roundtable Process is in place that includes scientists, managers, writers, editors, and Web technical experts. The close connection between the scientists and the writers/editors assures a high level of scientific accuracy in the finished products. The websites each have unique characters and are aimed at different audience segments: 1. http://science.nasa.gov. (SNG) Carries stories featuring various aspects of NASA science activity. The site carries 2 or 3 new stories each week in written and audio formats for science-attentive adults. 2. http://liftoff.msfc.nasa.gov. Features stories from SNG that are recast for a high school level audience. J-Track and J-Pass applets for tracking satellites are our most popular product. 3. http://kids. msfc.nasa.gov. This is the Nursemaids site and is aimed at a middle school audience. The NASAKids Club is a new feature at the site. 4. http://www.thursdaysclassroom.com . This site features lesson plans and classroom activities for educators centered around one of the science stories carried on SNG. 5. http://www.spaceweather.com. This site gives the status of solar activity and its interactions with the Earth's ionosphere and magnetosphere.
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King, Andrew
2008-01-01
Remember when an optimized website was one that merely didn't take all day to appear? Times have changed. Today, website optimization can spell the difference between enterprise success and failure, and it takes a lot more know-how to achieve success. This book is a comprehensive guide to the tips, techniques, secrets, standards, and methods of website optimization. From increasing site traffic to maximizing leads, from revving up responsiveness to increasing navigability, from prospect retention to closing more sales, the world of 21st century website optimization is explored, exemplified a
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Enrico Fermi centenary exhibition seminar
Maximilien Brice
2002-01-01
Photo 01: Dr. Juan Antonio Rubio, Leader of the Education and Technology Transfer Division and CERN Director General, Prof. Luciano Maiani. Photo 03: Luciano Maiani, Welcome and Introduction Photo 09: Antonino Zichichi, The New 'Centro Enrico Fermi' at Via Panisperna Photos 10, 13: Ugo Amaldi, Fermi at Via Panisperna and the birth of Nuclear Medicine Photo 14: Jack Steinberger, Fermi in Chicago Photo 18: Valentin Telegdi, A close-up of Fermi Photo 21: Arnaldo Stefanini, Celebrating Fermi's Centenary in Documents and Pictures.
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Impact of compressibility and a guide field on Fermi acceleration during magnetic island coalescence
Montag, Peter; Egedal, Jan; Lichko, Emily; Wetherton, Blake
2017-10-01
Previous work has shown that Fermi acceleration can be an effective heating mechanism during magnetic island coalescence, where electrons may undergo repeated reflections as the magnetic field lines contract. This energization has the potential to account for the power-law distributions of particle energy inferred from observations of solar flares. Here, we develop a generalized framework for the analysis of Fermi acceleration that can incorporate the effects of compressibility and non-uniformity along field lines, which have commonly been neglected in previous treatments of the problem. Applying this framework to the simplified case of the uniform flux tube allows us to find both the power-law scaling of the distribution function and the rate at which the power-law behavior develops. We find that a guide magnetic field of order unity effectively suppresses the development of power-law distributions. The work was supported by NASA Grant No. NNX14AC68G, NSF GEM Grant No. 1405166, NSF Award 1404166, and NASA Award NNX15AJ73G.
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Website history and the website as an object of study
DEFF Research Database (Denmark)
Brügger, Niels
2009-01-01
This article puts on the agenda one of the fundamental theoretical questions within the emerging field of website history: how can the object of historical study — the website — be delimited? Its focus is on the 'website' artefact as a medium and a text. After elaborating a definition...
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Pseudogap-generated a coexistence of Fermi arcs and Fermi pockets in cuprate superconductors
Zhao, Huaisong; Gao, Deheng; Feng, Shiping
2017-03-01
One of the most intriguing puzzle is why there is a coexistence of Fermi arcs and Fermi pockets in the pseudogap phase of cuprate superconductors? This puzzle is calling for an explanation. Based on the t - J model in the fermion-spin representation, the coexistence of the Fermi arcs and Fermi pockets in cuprate superconductors is studied by taking into account the pseudogap effect. It is shown that the pseudogap induces an energy band splitting, and then the poles of the electron Green's function at zero energy form two contours in momentum space, however, the electron spectral weight on these two contours around the antinodal region is gapped out by the pseudogap, leaving behind the low-energy electron spectral weight only located at the disconnected segments around the nodal region. In particular, the tips of these disconnected segments converge on the hot spots to form the closed Fermi pockets, generating a coexistence of the Fermi arcs and Fermi pockets. Moreover, the single-particle coherent weight is directly related to the pseudogap, and grows linearly with doping. The calculated result of the overall dispersion of the electron excitations is in qualitative agreement with the experimental data. The theory also predicts that the pseudogap-induced peak-dip-hump structure in the electron spectrum is absent from the hot-spot directions.
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Fermi surfaces in Kondo insulators
Liu, Hsu; Hartstein, Máté; Wallace, Gregory J.; Davies, Alexander J.; Ciomaga Hatnean, Monica; Johannes, Michelle D.; Shitsevalova, Natalya; Balakrishnan, Geetha; Sebastian, Suchitra E.
2018-04-01
We report magnetic quantum oscillations measured using torque magnetisation in the Kondo insulator YbB12 and discuss the potential origin of the underlying Fermi surface. Observed quantum oscillations as well as complementary quantities such as a finite linear specific heat capacity in YbB12 exhibit similarities with the Kondo insulator SmB6, yet also crucial differences. Small heavy Fermi sections are observed in YbB12 with similarities to the neighbouring heavy fermion semimetallic Fermi surface, in contrast to large light Fermi surface sections in SmB6 which are more similar to the conduction electron Fermi surface. A rich spectrum of theoretical models is suggested to explain the origin across different Kondo insulating families of a bulk Fermi surface potentially from novel itinerant quasiparticles that couple to magnetic fields, yet do not couple to weak DC electric fields.
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Sur, Shouvik; Lee, Sung-Sik
2016-11-01
We study non-Fermi-liquid states that arise at the quantum critical points associated with the spin density wave (SDW) and charge density wave (CDW) transitions in metals with twofold rotational symmetry. We use the dimensional regularization scheme, where a one-dimensional Fermi surface is embedded in (3 -ɛ ) -dimensional momentum space. In three dimensions, quasilocal marginal Fermi liquids arise both at the SDW and CDW critical points: the speed of the collective mode along the ordering wave vector is logarithmically renormalized to zero compared to that of Fermi velocity. Below three dimensions, however, the SDW and CDW critical points exhibit drastically different behaviors. At the SDW critical point, a stable anisotropic non-Fermi-liquid state is realized for small ɛ , where not only time but also different spatial coordinates develop distinct anomalous dimensions. The non-Fermi liquid exhibits an emergent algebraic nesting as the patches of Fermi surface are deformed into a universal power-law shape near the hot spots. Due to the anisotropic scaling, the energy of incoherent spin fluctuations disperse with different power laws in different momentum directions. At the CDW critical point, on the other hand, the perturbative expansion breaks down immediately below three dimensions as the interaction renormalizes the speed of charge fluctuations to zero within a finite renormalization group scale through a two-loop effect. The difference originates from the fact that the vertex correction antiscreens the coupling at the SDW critical point whereas it screens at the CDW critical point.
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Enrico Fermi Symposium at CERN : opening celebration
CERN. Geneva. Audiovisual Unit
2002-01-01
You are cordially invited to the opening celebration on Thursday 12 September at 16:00 (Main Building, Council Chamber), which will include speechs from: Luciano Maiani - Welcome and Introduction Antonino Zichichi - The New 'Centro Enrico Fermi' at Via Panisperna Ugo Amaldi - Fermi at Via Panisperna and the birth of Nuclear Medicine Jack Steinberger - Fermi in Chicago Valentin Telegdi - A Close-up of Fermi Arnaldo Stefanini - Celebrating Fermi's Centenary in Documents and Pictures and the screening of a documentary video about Fermi: Scienziati a Pisa: Enrico Fermi (Scientists at Pisa: Enrico Fermi) created by Francesco Andreotti for La Limonaia from early film, photographs and sound recordings (English version - c. 30 mins).
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Pengujian Dan Analisa Keamanan Website Terhadap Serangan SQL Injection (Studi Kasus : Website UMK)
Dahlan, Mohammad; Latubessy, Anastasya; Nurkamid, Mukhamad; Anggraini, Laelly Hidayah
2014-01-01
Keamanan merupakan salah satu faktor penting yang harus diperhatikan dalam membangun sebuah website. Hal tersebut menjadi sebuah tantangan tersendiri bagi para pengembang website, karena tidak ada jaminan yang pasti akan defenisi aman? itu sendiri. Tidak ada sistem yang benar-benar aman, bukanlah sebuah pernyataan semata, namun telah dirasakan dalam realitas. Website UMK merupakan website yang digunakan sebagai media dan sarana informasi kampus. Mengingat website ini dapat diakses secara luas...
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Proceedings of the 2003 NASA/JPL Workshop on Fundamental Physics in Space
Strayer, Don (Editor)
2003-01-01
The 2003 Fundamental Physics workshop included presentations ranging from forces acting on RNA to properties of clouds of degenerate Fermi atoms, to techniques to probe for a added space-time dimensions, and to flight hardware for low temperature experiments, amongst others. Mark Lee from NASA Headquarters described the new strategic plan that NASA has developed under Administrator Sean O'Keefe's leadership. Mark explained that the Fundamental Physics community now needs to align its research program and the roadmap describing the long-term goals of the program with the NASA plan. Ulf Israelsson of JPL discussed how the rewrite of the roadmap will be implemented under the leadership of the Fundamental Physics Discipline Working Group (DWG). Nick Bigelow, chair of the DWG, outlined how investigators can contribute to the writing of the roadmap. Results of measurements on very cold clouds of Fermi atoms near a Feshbach resonance were described by three investigators. Also, new measurements relating to tests of Einstein equivalence were discussed. Investigators also described methods to test other aspects of Einstein's relativity theories.
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Fermi wave vector for the partially spin-polarized composite-fermion Fermi sea
Balram, Ajit C.; Jain, J. K.
2017-12-01
The fully spin-polarized composite-fermion (CF) Fermi sea at the half-filled lowest Landau level has a Fermi wave vector kF*=√{4 π ρe } , where ρe is the density of electrons or composite fermions, supporting the notion that the interaction between composite fermions can be treated perturbatively. Away from ν =1 /2 , the area is seen to be consistent with kF*=√{4 π ρe } for ν 1 /2 , where ρh is the density of holes in the lowest Landau level. This result is consistent with particle-hole symmetry in the lowest Landau level. We investigate in this article the Fermi wave vector of the spin-singlet CF Fermi sea (CFFS) at ν =1 /2 , for which particle-hole symmetry is not a consideration. Using the microscopic CF theory, we find that for the spin-singlet CFFS the Fermi wave vectors for up- and down-spin CFFSs at ν =1 /2 are consistent with kF*↑,↓=√{4 π ρe↑,↓ } , where ρe↑=ρe↓=ρe/2 , which implies that the residual interactions between composite fermions do not cause a nonperturbative correction for spin-singlet CFFS either. Our results suggest the natural conjecture that for arbitrary spin polarization the CF Fermi wave vectors are given by kF*↑=√{4 π ρe↑ } and kF*↓=√{4 π ρe↓ } .
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Research on website construction based on website group platform of Chengdu sport institution
Hu, Zunyu
2018-04-01
This paper describes the necessity of website construction based on the website group of Chengdu sport institute, and discusses the technical features of the website group, Based on the website group platform architecture, the key technologies such as Web Service, AJAX, RSS and other key technologies are used to realize the construction of the website. Based on the website group platform architecture of the site, it effectively solves the information isolated island between the sites, and realizes the information sharing and resource integration. It is also more convenient that site and other sites have composed of site group integrated operation and maintenance.
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Seebeck effect on a weak link between Fermi and non-Fermi liquids
Nguyen, T. K. T.; Kiselev, M. N.
2018-02-01
We propose a model describing Seebeck effect on a weak link between two quantum systems with fine-tunable ground states of Fermi and non-Fermi liquid origin. The experimental realization of the model can be achieved by utilizing the quantum devices operating in the integer quantum Hall regime [Z. Iftikhar et al., Nature (London) 526, 233 (2015), 10.1038/nature15384] designed for detection of macroscopic quantum charged states in multichannel Kondo systems. We present a theory of thermoelectric transport through hybrid quantum devices constructed from quantum-dot-quantum-point-contact building blocks. We discuss pronounced effects in the temperature and gate voltage dependence of thermoelectric power associated with a competition between Fermi and non-Fermi liquid behaviors. High controllability of the device allows to fine tune the system to different regimes described by multichannel and multi-impurity Kondo models.
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Fermi: a physicist in the upheaval; Fermi: un physicien dans la tourmente
Energy Technology Data Exchange (ETDEWEB)
Maria, M. de
2002-07-01
This book summarizes the life, works and complex personality of the Italian physicist Enrico Fermi (1901-1954) whose myth is linked with the political upheaval of the 2. world war: the youth of an autodidact, the theorician and the quantum mechanics, his invention of a quantum statistics, the weak interaction theory, his works on artificial radioactivity, the end of the Fermi team and his exile in the USA, the secrete researches at the university of Columbia and the birth of the first atomic 'pile' (December 2, 1942), the building of Los Alamos center and the Alamogordo explosion test, the disagreements among the physicists of the Manhattan project and the position of Fermi, Fermi's contribution in the H-bomb construction, the creation of the physics school of Chicago, the Oppenheimer spying affair. (J.S.)
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Internet food marketing on popular children's websites and food product websites in Australia.
Kelly, Bridget; Bochynska, Katarzyna; Kornman, Kelly; Chapman, Kathy
2008-11-01
The aim of the present study was to describe the nature and extent of food marketing on popular children's websites and food product websites in Australia. Food product websites (n 119) and popular children's websites (n 196) were selected based on website traffic data and previous research on frequently marketed food brands. Coding instruments were developed to capture food marketing techniques. All references to food on popular children's websites were also classified as either branded or non-branded and according to food categories. Websites contained a range of marketing features. On food product websites these marketing features included branded education (79.0% of websites), competitions (33.6%), promotional characters (35.3%), downloadable items (35.3%), branded games (28.6%) and designated children's sections (21.8%). Food references on popular children's websites were strongly skewed towards unhealthy foods (60.8% v. 39.2% healthy food references; Pfood references for unhealthy foods. Branded food references displayed similar marketing features to those identified on food product websites. Internet food marketing uses a range of techniques to ensure that children are immersed in brand-related information and activities for extended periods, thereby increasing brand familiarity and exposure. The relatively unregulated marketing environment and increasing use of the Internet by children point to the potential increase in food marketing via this medium. Further research is required to investigate the impact of Internet food marketing on children's food preferences and consumption, and regulatory options to protect children.
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Lassila, Joonas
2016-01-01
The aim of this Bachelor’s thesis was to develop a WordPress mobile-first style website for the customer, Pohjois-Suomen Pesis. The main purpose of the development was to learn website designing principles and create a responsive website for the mobile and desktop platforms. The development process began defining the requirements of the website and creating the requirements document. Then next step was learning how to design a website layout and to choose the colour scheme for the site. T...
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DEFF Research Database (Denmark)
Brügger, Niels
This book treats the micro archiving of websites, i.e. archiving by researchers, students or others without special technical knowledge who, using a standard computer, wish to save a website for further study. The phenomenon is discussed from the standpoint that Internet research must be able...
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Thermal gravitational radiation of Fermi gases and Fermi liquids
International Nuclear Information System (INIS)
Schafer, G.; Dehnen, H.
1983-01-01
In view of neutron stars the gravitational radiation power of the thermal ''zero-sound'' phonons of a Fermi liquid and the gravitational bremsstrahlung of a degenerate Fermi gas is calculated on the basis of a hard-sphere Fermi particle model. We find for the gravitational radiation power per unit volume P/sub( s/)approx. =[(9π)/sup 1/3//5] x GQ n/sup 5/3/(kT) 4 h 2 c 5 and P/sub( g/)approx. =(4 5 /5 3 )(3/π)/sup 2/3/ G a 2 n/sup 5/3/(kT) 4 /h 2 c 5 for the cases of ''zero sound'' and bremsstrahlung, respectively. Here Q = 4πa 2 is the total cross section of the hard-sphere fermions, where a represents the radius of their hard-core potential. The application to very young neutron stars results in a total gravitational luminosity of about 10 31 erg/sec
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Instabilities of a Fermi gas with nested Fermi surfaces
Energy Technology Data Exchange (ETDEWEB)
Schlottmann, Pedro [Department of Physics, Florida State University, Tallahassee, FL (United States)
2018-01-15
The nesting of the Fermi surfaces of an electron and a hole pocket separated by a vector Q commensurate with the lattice in conjunction with the interaction between the quasiparticles can give rise to a rich phase diagram. Of particular importance is itinerant antiferromagnetic order in the context of pnictides and heavy fermion compounds. By mismatching the nesting the order can gradually be suppressed and as the Neel temperature tends to zero a quantum critical point is obtained. A superconducting dome above the quantum critical point can be induced by the transfer of pairs of electrons between the pockets. The conditions under which such a dome arises are studied. In addition numerous other phases may arise, e.g. charge density waves, non-Fermi liquid behavior, non-s-wave superconductivity, Pomeranchuk instabilities of the Fermi surface, nematic order, and phases with persistent orbital currents. (copyright 2017 by WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)
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WEB USABILITY OF PUBLIC ORGANIZATION WEBSITES: The Case of Indonesian Ministry Websites
Directory of Open Access Journals (Sweden)
Ali Rokhman
2012-08-01
Full Text Available As a consequence of the development of Information and Communication Technologies (ICT, nowadays almost all governments around the world, included Indonesian government have official websites to provide information and services for their citizen. In the second period of President Susilo Bambang Yudhoyono administration has thirty two ministries and each ministries have an official website. However implementation of the ministry websites have not been measured yet on usability aspect. The objective of this research is to examine the usability of ministry websites of Indonesian Government. Eleven websites was taken as sample in this study. Respondents are 128 Internet users who have competency for assessing web usability. Usability of websites were measured by several indicators were adapted from E-Government Toolkit for Developing Countries that was prepared by the National Informatics Centre and UNESCO. The main indicators consist of navigation architecture, layout design, and content.
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Taylor, G. J.; Martel, L. M. V.
2000-01-01
Planetary Science Research Discoveries (PSRD) website reports the latest research about planets, meteorites, and other solar system bodies being made by NASA-sponsored scientists. In-depth articles explain research results and give insights to contemporary questions in planetary science.
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Energy Technology Data Exchange (ETDEWEB)
Kubbinga, H. [Groningen Univ. (Netherlands)
2009-07-01
This article is a short biography of Enrico Fermi 'The Pope of physics'. His main contributions in theoretical physics have paved the way to quantum electrodynamics and the quantization of the fields. Fermi got also great achievements on beta decay process and on nuclear reactions brought about by slow neutrons. Fermi was awarded the Nobel prize of physics in 1938
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Impact of Perceived Website Service Quality on Customer E-Loyalty on a Lodging Website
Jeon, Myunghee
2009-01-01
Customer loyalty on websites, "e-loyalty", is reflected on customer behavior, regardless of online or offline business. Specifically, it is believed that customer loyalty on a website is strongly associated with website service quality. This study rigorously reviewed previously reported research in the website service quality dimensions and…
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Pro website development and operations streamlining DevOps for large-scale websites
Sacks, Matthew
2012-01-01
Pro Website Development and Operations gives you the experience you need to create and operate a large-scale production website. Large-scale websites have their own unique set of problems regarding their design-problems that can get worse when agile methodologies are adopted for rapid results. Managing large-scale websites, deploying applications, and ensuring they are performing well often requires a full scale team involving the development and operations sides of the company-two departments that don't always see eye to eye. When departments struggle with each other, it adds unnecessary comp
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Energy Technology Data Exchange (ETDEWEB)
Chen, Jing-Yuan, E-mail: chjy@uchicago.edu [Kadanoff Center for Theoretical Physics, University of Chicago, Chicago, IL 60637 (United States); Stanford Institute for Theoretical Physics, Stanford University, CA 94305 (United States); Son, Dam Thanh, E-mail: dtson@uchicago.edu [Kadanoff Center for Theoretical Physics, University of Chicago, Chicago, IL 60637 (United States)
2017-02-15
We develop an extension of the Landau Fermi liquid theory to systems of interacting fermions with non-trivial Berry curvature. We propose a kinetic equation and a constitutive relation for the electromagnetic current that together encode the linear response of such systems to external electromagnetic perturbations, to leading and next-to-leading orders in the expansion over the frequency and wave number of the perturbations. We analyze the Feynman diagrams in a large class of interacting quantum field theories and show that, after summing up all orders in perturbation theory, the current–current correlator exactly matches with the result obtained from the kinetic theory. - Highlights: • We extend Landau’s kinetic theory of Fermi liquid to incorporate Berry phase. • Berry phase effects in Fermi liquid take exactly the same form as in Fermi gas. • There is a new “emergent electric dipole” contribution to the anomalous Hall effect. • Our kinetic theory is matched to field theory to all orders in Feynman diagrams.
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Information Classification on University Websites
DEFF Research Database (Denmark)
Nawaz, Ather; Clemmensen, Torkil; Hertzum, Morten
2011-01-01
Websites are increasingly used as a medium for providing information to university students. The quality of a university website depends on how well the students’ information classification fits with the structure of the information on the website. This paper investigates the information classifi......Websites are increasingly used as a medium for providing information to university students. The quality of a university website depends on how well the students’ information classification fits with the structure of the information on the website. This paper investigates the information...... classification of 14 Danish and 14 Pakistani students and compares it with the information classification of their university website. Brainstorming, card sorting, and task exploration activities were used to discover similarities and differences in the participating students’ classification of website...... information and their ability to navigate the websites. The results of the study indicate group differences in user classification and related taskperformance differences. The main implications of the study are that (a) the edit distance appears a useful measure in cross-country HCI research and practice...
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Information Classification on University Websites
DEFF Research Database (Denmark)
Nawaz, Ather; Clemmensen, Torkil; Hertzum, Morten
2011-01-01
Websites are increasingly used as a medium for providing information to university students. The quality of a university website depends on how well the students’ information classification fits with the structure of the information on the website. This paper investigates the information classifi......Websites are increasingly used as a medium for providing information to university students. The quality of a university website depends on how well the students’ information classification fits with the structure of the information on the website. This paper investigates the information...... classification of 14 Danish and 14 Pakistani students and compares it with the information classification of their university website. Brainstorming, card sorting, and task exploration activities were used to discover similarities and differences in the participating students’ classification of website...... information and their ability to navigate the websites. The results of the study indicate group differences in user classification and related task-performance differences. The main implications of the study are that (a) the edit distance appears a useful measure in cross-country HCI research and practice...
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Eclipse 2017: Through the Eyes of NASA
Mayo, Louis; NASA Heliophysics Education Consortium
2017-10-01
The August 21, 2017 total solar eclipse across America was, by all accounts, the biggest science education program ever carried out by NASA, significantly larger than the Curiosity Mars landing and the New Horizons Pluto flyby. Initial accounting estimates over two billion people reached and website hits exceeding five billion. The NASA Science Mission Directorate spent over two years planning and developing this enormous public education program, establishing over 30 official NASA sites along the path of totality, providing imagery from 11 NASA space assets, two high altitude aircraft, and over 50 high altitude balloons. In addition, a special four focal plane ground based solar telescope was developed in partnership with Lunt Solar Systems that observed and processed the eclipse in 6K resolution. NASA EDGE and NASA TV broadcasts during the entirity of totality across the country reached hundreds of millions, world wide.This talk will discuss NASA's strategy, results, and lessons learned; and preview some of the big events we plan to feature in the near future.
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Engaging patients through your website.
Snyder, Kimberlee; Ornes, Lynne L; Paulson, Pat
2014-01-01
Legislation requires the healthcare industry to directly engage patients through technology. This paper proposes a model that can be used to review hospital websites for features that engage patients in their healthcare. The model describes four levels of patient engagement in website design. The sample consisted of 130 hospital websites from hospitals listed on 2010 and 2011 Most Wired Hospitals. Hospital websites were analyzed for features that encouraged patient interaction with their healthcare according to the levels in the model. Of the four levels identified in the model, websites ranged from "informing" to "collaborative" in website design. There was great variation of features offered on hospital websites with few being engaging and interactive. © 2012 National Association for Healthcare Quality.
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National Aeronautics and Space Administration — Fermi is a powerful space observatory that will open a wide window on the universe. Gamma rays are the highest-energy form of light, and the gamma-ray sky is...
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Website Policies / Important Links | DOepatents
Links Website Policies / Important Links Javascript Not Enabled OSTI Security Website Policies and first) Publication Date (oldest first) Close Clear All Find DOepatents Website Policies / Important Important Links Some links on this page may take you to non-federal websites. Their policies may differ from
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DEVELOPMENT OF A COMMERCIAL WEBSITE
Faruk, Md.
2016-01-01
The goal of this thesis was to create an electronic online store website. Before building this website, the thesis explains about the ecommerce website because there is considerable amount classification of ecommerce. Moreover, the overall web page design and constructing process of an online store is shown on the constructed website. Header, body, footer, content menu and navigation system are represented through the website. Every successful project needs a proper plan. This project ...
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Downes, P K
2007-05-26
A website is a window to the outside world. For a dental practice, it may be the first point of contact for a prospective new patient and will therefore provide them with their 'first impression'; this may be days or weeks before actually visiting the practice. This section considers the different ways of creating a dental practice website and lists some of the main dental website design companies. It also describes what factors make a successful website and offers advice on how to ensure that it complies with current regulations and recommendations.
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The Effects of Website Information Utility on the Outcomes of User-Website Interactions
Hasley, Joseph Paul
2010-01-01
This study investigates the relationships between website information content utility and various outcomes of user interactions with e-tail websites. Although previous research has consistently identified high quality information content as a critical factor of successful e-commerce websites, those studies have not reported how to identify the…
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Moshe RozaliDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada; Darren Smyth(Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada)
2014-01-01
We discuss finite density configurations on probe D-branes, in the presence of worldvolume fermions. To this end we consider a phenomenological model whose bosonic sector is governed by the DBI action, and whose charged sector is purely fermionic. In this model, we demonstrate the existence of a compact worldvolume embedding, stabilized by a Fermi surface on the D- brane. The finite density state in the boundary QFT is a Fermi-like liquid. We comment on the possibility of realizing non-Fermi ...
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School Executive Website Study
Thiede, Robert
2009-01-01
The School Executive Website will be a one-stop, online site for officials who are looking for educational data, best practices, product reviews, school documents, professional opinions, and/or job-related networking. The format of the website is designed in certain sections similar to other current and popular websites, such as Angie's List.com,…
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NASA Space Flight Human-System Standard Human Factors, Habitability, and Environmental Health
Holubec, Keith; Connolly, Janis
2010-01-01
This slide presentation reviews the history, and development of NASA-STD-3001, NASA Space Flight Human-System Standard Human Factors, Habitability, and Environmental Health, and the related Human Integration Design Handbook. Currently being developed from NASA-STD-3000, this project standard currently in review will be available in two volumes, (i.e., Volume 1 -- VCrew Health and Volume 2 -- Human Factors, Habitability, and Environmental Health) and the handbook will be both available as a pdf file and as a interactive website.
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Got a Minute? Tune Your iPad to NASA's Best
Leon, N.; Fitzpatrick, A. J.; Fisher, D. K.; Netting, R. A.
2012-12-01
Space Place Prime is a content presentation app for the iPad. It gathers some of the best and most recent web offerings from NASA. A spinoff of NASA's popular kids' website The Space Place (spaceplace.nasa.gov or science.nasa.gov/kids), Space Place Prime taps timely educational and easy-to-read articles from the website, as well as daily updates of NASA space and Earth images and the latest informative videos, including Science Casts and the monthly "What's up in the Sky." Space Place Prime targets a multigenerational audience, including anyone with an interest in NASA and science in general. Features are offered for kids, teachers, parents, space enthusiasts, and everyone in between. The app can be the user's own NASA news source. Like a newspaper or magazine app, Space Place Prime downloads new content daily via wireless connection. In addition to the Space Place website, several NASA RSS feeds are tapped to provide new content. Content is retained for the previous several days or some number of editions of each feed. All content is controlled on the server side, so we can push features about the latest news or change any content without updating the app in the Apple Store. The Space Place Prime interface is a virtual endless grid of small images with short titles, each image a link to an image, video, article, or hands-on activity for kids. The grid can be dragged in any direction with no boundaries. (Image links repeat to fill in the grid "infinitely.") For a more focused search, a list mode presents menus of images, videos, and articles (including activity articles) separately. If the user tags a page (image, video, or article) as a Favorite, the content is downloaded and maintained on the device, and remains permanently available regardless of connectivity. (Very large video files are permanently retained on the server side, however, rather than taking up the limited storage on the iPad.) Facebook, twitter, and e-mail connections make any feature easy to
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Universal behavior of strongly correlated Fermi systems
Energy Technology Data Exchange (ETDEWEB)
Shaginyan, Vasilii R [B.P. Konstantinov St. Petersburg Institute of Nuclear Physics, Russian Academy of Sciences, Gatchina, Leningrad region, Rusian Federation (Russian Federation); Amusia, M Ya [A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg (Russian Federation); Popov, Konstantin G [Komi Scientific Center, Ural Branch of the Russian Academy of Sciences, Syktyvkar (Russian Federation)
2007-06-30
This review discusses the construction of a theory and the analysis of phenomena occurring in strongly correlated Fermi systems such as high-T{sub c} superconductors, heavy-fermion metals, and quasi-two-dimensional Fermi systems. It is shown that the basic properties and the universal behavior of strongly correlated Fermi systems can be described in the framework of the Fermi-condensate quantum phase transition and the well-known Landau paradigm of quasiparticles and the order parameter. The concept of fermion condensation may be fruitful in studying neutron stars, finite Fermi systems, ultra-cold gases in traps, and quark plasma. (reviews of topical problems)
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Universal behavior of strongly correlated Fermi systems
International Nuclear Information System (INIS)
Shaginyan, Vasilii R; Amusia, M Ya; Popov, Konstantin G
2007-01-01
This review discusses the construction of a theory and the analysis of phenomena occurring in strongly correlated Fermi systems such as high-T c superconductors, heavy-fermion metals, and quasi-two-dimensional Fermi systems. It is shown that the basic properties and the universal behavior of strongly correlated Fermi systems can be described in the framework of the Fermi-condensate quantum phase transition and the well-known Landau paradigm of quasiparticles and the order parameter. The concept of fermion condensation may be fruitful in studying neutron stars, finite Fermi systems, ultra-cold gases in traps, and quark plasma. (reviews of topical problems)
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Factors Affecting University Library Website Design
Directory of Open Access Journals (Sweden)
Yongi-Mi Kim
2011-09-01
Full Text Available Existing studies have extensively explored factors that affect users’ intentions to use university library website resources (ULWR; yet little attention has been given to factors affecting university library website design. This paper investigates factors that affect university library website design and assesses the success of the university library website from both designers’ and users’ perspectives. The findings show that when planning a website, university web designers consider university guidelines, review other websites, and consult with experts and other divisions within the library; however, resources and training for the design process are lacking. While website designers assess their websites as highly successful, user evaluations are somewhat lower. Accordingly, use is low, and users rely heavily on commercial websites. Suggestions for enhancing the usage of ULWR are provided.
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SPRITE: the Spitzer proposal review website
Crane, Megan K.; Storrie-Lombardi, Lisa J.; Silbermann, Nancy A.; Rebull, Luisa M.
2008-07-01
The Spitzer Science Center (SSC), located on the campus of the California Institute of Technology, supports the science operations of NASA's infrared Spitzer Space Telescope. The SSC issues an annual Call for Proposals inviting investigators worldwide to submit Spitzer Space Telescope proposals. The Spitzer Proposal Review Website (SPRITE) is a MySQL/PHP web database application designed to support the SSC proposal review process. Review panel members use the software to view, grade, and write comments about the proposals, and SSC support team members monitor the grading and ranking process and ultimately generate a ranked list of all the proposals. The software is also used to generate, edit, and email award letters to the proposers. This work was performed at the California Institute of Technology under contract to the National Aeronautics and Space Administration.
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Communicating the Science from NASA's Astrophysics Missions
Hasan, Hashima; Smith, Denise A.
2015-01-01
Communicating science from NASA's Astrophysics missions has multiple objectives, which leads to a multi-faceted approach. While a timely dissemination of knowledge to the scientific community follows the time-honored process of publication in peer reviewed journals, NASA delivers newsworthy research result to the public through news releases, its websites and social media. Knowledge in greater depth is infused into the educational system by the creation of educational material and teacher workshops that engage students and educators in cutting-edge NASA Astrophysics discoveries. Yet another avenue for the general public to learn about the science and technology through NASA missions is through exhibits at museums, science centers, libraries and other public venues. Examples of the variety of ways NASA conveys the excitement of its scientific discoveries to students, educators and the general public will be discussed in this talk. A brief overview of NASA's participation in the International Year of Light will also be given, as well as of the celebration of the twenty-fifth year of the launch of the Hubble Space Telescope.
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This FERMI multi-chip module contains five million transistors. 25 000 of these modules will handle the flood of information through parts of the ATLAS and CMS detectors at the LHC. To select interesting events for recording, crucial decisions are taken before the data leaves the detector. FERMI modules are being developed at CERN in partnership with European industry.
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Benchmarked Library Websites Comparative Study
Ramli, Rindra M.; Tyhurst, Janis
2015-01-01
This presentation provides an analysis of services provided by the benchmarked library websites. The exploratory study includes comparison of these websites against a list of criterion and presents a list of services that are most commonly deployed by the selected websites. In addition to that, the investigators proposed a list of services that could be provided via the KAUST library website.
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Evaluating Dermatology Residency Program Websites.
Ashack, Kurt A; Burton, Kyle A; Soh, Jonathan M; Lanoue, Julien; Boyd, Anne H; Milford, Emily E; Dunnick, Cory; Dellavalle, Robert P
2016-03-16
Internet resources play an important role in how medical students access information related to residency programs.Evaluating program websites is necessary in order to provide accurate information for applicants and provide information regarding areas of website improvement for programs. To date, dermatology residency websites (D WS) have not been evaluated.This paper evaluates dermatology residency websites based on availability of predefined measures. Using the FREIDA (Fellowship and Residency Electronic Interactive Database) Online database, authors searched forall accredited dermatology program websites. Eligible programs were identified through the FREIDA Online database and had a functioning website. Two authors independently extracted data with consensus or third researcher resolution of differences. This data was accessed and archived from July 15th to July 17th, 2015.Primary outcomes measured were presence of content on education, resident and faculty information, program environment, applicant recruitment, schedule, salary, and website quality evaluated using an online tool (WooRank.com). Out of 117 accredited dermatology residencies, 115 had functioning webpages. Of these, 76.5% (75) had direct links found on the FRIEDA Online database. Most programs contained information on education, faculty, program environment, and applicant recruitment. However, website quality and marketing effectiveness were highly variable; most programs were deemed to need improvements in the functioning of their webpages. Also, additional information on current residents and about potential away rotations were lacking from most websites with only 52.2% (60) and 41.7% (48) of programs providing this content, respectively. A majority of dermatology residency websites contained adequate information on many of the factors we evaluated. However, many were lacking in areas that matter to applicants. We hope this report will encourage dermatology residencyprograms
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Relativistic finite-temperature Thomas-Fermi model
Faussurier, Gérald
2017-11-01
We investigate the relativistic finite-temperature Thomas-Fermi model, which has been proposed recently in an astrophysical context. Assuming a constant distribution of protons inside the nucleus of finite size avoids severe divergence of the electron density with respect to a point-like nucleus. A formula for the nuclear radius is chosen to treat any element. The relativistic finite-temperature Thomas-Fermi model matches the two asymptotic regimes, i.e., the non-relativistic and the ultra-relativistic finite-temperature Thomas-Fermi models. The equation of state is considered in detail. For each version of the finite-temperature Thomas-Fermi model, the pressure, the kinetic energy, and the entropy are calculated. The internal energy and free energy are also considered. The thermodynamic consistency of the three models is considered by working from the free energy. The virial question is also studied in the three cases as well as the relationship with the density functional theory. The relativistic finite-temperature Thomas-Fermi model is far more involved than the non-relativistic and ultra-relativistic finite-temperature Thomas-Fermi models that are very close to each other from a mathematical point of view.
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Pratas, Antonio
2014-01-01
This book contains practical, step-by-step tutorials along with plenty of explanation about designing your flat website. Each section is introduced sequentially, building up your web design skills and completing your website.Creating Flat Design Websites is ideal for you if you are starting on your web development journey, but this book will also benefit seasoned developers wanting to start developing in flat.
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High-energy emission from bright gamma-ray bursts using Fermi
Energy Technology Data Exchange (ETDEWEB)
Bissaldi, Elisabetta
2010-05-25
Among the scientific objectives of one of the present NASA missions, the Fermi Gamma-ray Space Telescope (FGST), is the study of gamma-ray bursts (GRBs). Fermi's payload comprises two science instruments, the Large Area Telescope (LAT) and the Gamma-Ray Burst Monitor (GBM). GBM was designed to detect and localize bursts for the Fermi mission. By means of an array of 12 NaI(Tl) (8 keV to 1 MeV) and two BGO (0.2 to 40 MeV) scintillation detectors, GBM extends the energy range (20 MeV to > 300 GeV) of the LAT instrument into the traditional range of current GRB databases. The physical detector response of the GBM instrument to GRBs has been determined with the help of Monte Carlo simulations, which are supported and verified by on-ground individual detector calibration measurements. The GBM detectors have been calibrated from 10 keV to 17.5 MeV using various gamma sources, and the detector response has been derived by simulations over the entire energy range (8 keV to 40 MeV) using GEANT. The GBM instrument has been operating successfully in orbit since June 11, 2008. The total trigger count from the time GBM triggering was enabled in July 2008 through December 2009 is 655, and about 380 of these triggers were classified as GRBs. Moreover, GBM detected several bursts in common with the LAT. These amazing detections mainly fulfill the primary science goal of GBM, which is the joint analysis of spectra and time histories of GRBs observed by both Fermi instruments. For every trigger, GBM provides near-real time on-board burst locations to permit repointing of the spacecraft and to obtain LAT observations of delayed emission from bursts. GBM and LAT refined locations are rapidly disseminated to the scientific community, often permitting extensive multiwavelength follow-up observations by NASA's Swift mission or other space- based observatories, and by numerous ground-based telescopes, thus allowing redshift determinations. Calculations of LAT upper limits are
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High-energy emission from bright gamma-ray bursts using Fermi
International Nuclear Information System (INIS)
Bissaldi, Elisabetta
2010-01-01
Among the scientific objectives of one of the present NASA missions, the Fermi Gamma-ray Space Telescope (FGST), is the study of gamma-ray bursts (GRBs). Fermi's payload comprises two science instruments, the Large Area Telescope (LAT) and the Gamma-Ray Burst Monitor (GBM). GBM was designed to detect and localize bursts for the Fermi mission. By means of an array of 12 NaI(Tl) (8 keV to 1 MeV) and two BGO (0.2 to 40 MeV) scintillation detectors, GBM extends the energy range (20 MeV to > 300 GeV) of the LAT instrument into the traditional range of current GRB databases. The physical detector response of the GBM instrument to GRBs has been determined with the help of Monte Carlo simulations, which are supported and verified by on-ground individual detector calibration measurements. The GBM detectors have been calibrated from 10 keV to 17.5 MeV using various gamma sources, and the detector response has been derived by simulations over the entire energy range (8 keV to 40 MeV) using GEANT. The GBM instrument has been operating successfully in orbit since June 11, 2008. The total trigger count from the time GBM triggering was enabled in July 2008 through December 2009 is 655, and about 380 of these triggers were classified as GRBs. Moreover, GBM detected several bursts in common with the LAT. These amazing detections mainly fulfill the primary science goal of GBM, which is the joint analysis of spectra and time histories of GRBs observed by both Fermi instruments. For every trigger, GBM provides near-real time on-board burst locations to permit repointing of the spacecraft and to obtain LAT observations of delayed emission from bursts. GBM and LAT refined locations are rapidly disseminated to the scientific community, often permitting extensive multiwavelength follow-up observations by NASA's Swift mission or other space- based observatories, and by numerous ground-based telescopes, thus allowing redshift determinations. Calculations of LAT upper limits are mainly based
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Expansions of Fermi and symmetrized Fermi integrals and applications in nuclear physics
International Nuclear Information System (INIS)
Grypeos, M.; Koutroulos, C.; Luk'yanov, V.; Shebeko, A.
1998-01-01
A detailed study is undertaken, using various techniques, in deriving expansions of integrals containing the Fermi or the symmetrized Fermi distributions. The results are presented in a mathematically compact form and consist of generalizations and extensions of previously known expansions. The relevance of the results to quantities of interest in nuclear physics is recalled and particular attention is paid to the so-called exponentially small terms which may play an essential role in certain cases
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Recent Developments in Non-Fermi Liquid Theory
Lee, Sung-Sik
2018-03-01
Non-Fermi liquids are unconventional metals whose physical properties deviate qualitatively from those of noninteracting fermions due to strong quantum fluctuations near Fermi surfaces. They arise when metals are subject to singular interactions mediated by soft collective modes. In the absence of well-defined quasiparticles, universal physics of non-Fermi liquids is captured by interacting field theories which replace Landau Fermi liquid theory. However, it has been difficult to understand their universal low-energy physics due to a lack of theoretical methods that take into account strong quantum fluctuations in the presence of abundant low-energy degrees of freedom. In this review, we discuss two approaches that have been recently developed for non-Fermi liquid theory with emphasis on two space dimensions. The first is a perturbative scheme based on a dimensional regularization, which achieves a controlled access to the low-energy physics by tuning the codimension of Fermi surface. The second is a nonperturbative approach which treats the interaction ahead of the kinetic term through a non-Gaussian scaling called interaction-driven scaling. Examples of strongly coupled non-Fermi liquids amenable to exact treatments through the interaction-driven scaling are discussed.
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2008-01-01
A new public website for the LHCb experiment was launched last Friday to coincide with CERN’s Open Day weekend. Designed to provide accessible information on all aspects of the experiment, the website contains images and key facts about the LHCb detector, its design and installation and the international team behind the project. "LHCb is going to be one of the most important b-physics experiments in the world when it starts taking data later this year", explains Roger Forty, the experiment’s deputy spokesperson. "We hope the website will be a valuable resource, enabling people to learn about this fascinating area of research." The new website can be found at: http://cern.ch/lhcb-public
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Website Policies / Important Links | Data Explorer
Website Policies / Important Links Javascript Not Enabled OSTI Security Website Policies and Important ) Publication Date (oldest first) Close Clear All Find DOE Data Explorer Website Policies / Important Links Science | Office of Scientific and Technical Information Website Policies / Important Links * Site Map
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Training Presentation for NASA Civil Helicopter Safety Website
Iseler, Laura
2002-01-01
NASA civil helicopter safety News & Updates include the following: Mar. 2002. The Air Medical Operations Survey has been completed! Check it out! Also accessible via the Mission pages under Air Medical Mission. Air Medical and Law Enforcement Mission pages have been added. They are accessible via the Mission pages. The Public Use, Personal, Offshore, Law Enforcement, External Load, Business and Gyro accident pages (accessable via the Mission page) have been updated. Feb. 2002. A Words of Wisdom section has been added. You can access it by clicking the Library button. A link to a Corporate Accident Response Plan has been added to the Accident page. The AMs, Aerial Application and Instruction accident pages (accessable via the Mission page) have been updated. Jan. 2002. A new searchable safety article database has been added. You can access it by clicking the Library button. The 2001 accident summaries have been updated and the statistics have been compiled - check it out by clicking the accident tab to the left. Dec. 2001. Please read the FAA Administrator's memo regarding the latest FBI warning. 3ee the FAA column - Fall 2001 Read it now!
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Verification of the websites optimality
Hozjan, Boštjan
2016-01-01
Today, search engines are an important source of information for internet users. Whenever user performs a search, search engines display a vast number of results. Results are ranked by search engines’ own algorithms, which are not public. If a website owner wants his website to be found in search engines and consequently wants to generate traffic to the website through search engines, the website must appear among the first search results. Website’s position within the search engine result...
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Library Website Usability Test Project
Ramli, Rindra M.; Bukhari, Duaa
2013-01-01
This usability testing project was conducted to elicit an understanding of our community use of the library website. The researchers wanted to know how our users are interacting with the library website and the ease of obtaining relevant information from the website. The methodology deployed was computer user testing where participants are made to answer several questions and executing the actions on the library website. Their actions are recorded via Techsmith Camtasia software for later analysis by the researchers.
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Library Website Usability Test Project
Ramli, Rindra M.
2013-06-01
This usability testing project was conducted to elicit an understanding of our community use of the library website. The researchers wanted to know how our users are interacting with the library website and the ease of obtaining relevant information from the website. The methodology deployed was computer user testing where participants are made to answer several questions and executing the actions on the library website. Their actions are recorded via Techsmith Camtasia software for later analysis by the researchers.
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Factors Affecting University Library Website Design
Kim, Yongi-Mi; University of Oklahoma
2011-01-01
Existing studies have extensively explored factors that affect users’ intentions to use university library website resources (ULWR); yet little attention has been given to factors affecting university library website design. This paper investigates factors that affect university library website design and assesses the success of the university library website from both designers’ and users’ perspectives. The findings show that when planning a website, university web designers consider univers...
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Pulsar Timing with the Fermi LAT
2010-12-01
Pulsar Timing with the Fermi LAT Paul S. Ray∗, Matthew Kerr†, Damien Parent∗∗ and the Fermi PSC‡ ∗Naval Research Laboratory, 4555 Overlook Ave., SW...Laboratory, Washington, DC 20375, USA ‡Fermi Pulsar Search Consortium Abstract. We present an overview of precise pulsar timing using data from the Large...unbinned photon data. In addition to determining the spindown behavior of the pulsars and detecting glitches and timing noise, such timing analyses al
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Enrico Fermi the obedient genius
Bruzzaniti, Giuseppe
2016-01-01
This biography explores the life and career of the Italian physicist Enrico Fermi, which is also the story of thirty years that transformed physics and forever changed our understanding of matter and the universe: nuclear physics and elementary particle physics were born, nuclear fission was discovered, the Manhattan Project was developed, the atomic bombs were dropped, and the era of “big science” began. It would be impossible to capture the full essence of this revolutionary period without first understanding Fermi, without whom it would not have been possible. Enrico Fermi: The Obedient Genius attempts to shed light on all aspects of Fermi’s life - his work, motivation, influences, achievements, and personal thoughts - beginning with the publication of his first paper in 1921 through his death in 1954. During this time, Fermi demonstrated that he was indeed following in the footsteps of Galileo, excelling in his work both theoretically and experimentally by deepening our understanding of the Pauli e...
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DEFF Research Database (Denmark)
Thorlacius, Lisbeth
2009-01-01
eller blindgyder, når han/hun besøger sitet. Studier i design og analyse af de visuelle og æstetiske aspekter i planlægning og brug af websites har imidlertid kun i et begrænset omfang været under reflektorisk behandling. Det er baggrunden for dette kapitel, som indleder med en gennemgang af æstetikkens......Websitet er i stigende grad det foretrukne medie inden for informationssøgning,virksomhedspræsentation, e-handel, underholdning, undervisning og social kontakt. I takt med denne voksende mangfoldighed af kommunikationsaktiviteter på nettet, er der kommet mere fokus på at optimere design og...... planlægning af de funktionelle og indholdsmæssige aspekter ved websites. Der findes en stor mængde teori- og metodebøger, som har specialiseret sig i de tekniske problemstillinger i forbindelse med interaktion og navigation, samt det sproglige indhold på websites. Den danske HCI (Human Computer Interaction...
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Energy Technology Data Exchange (ETDEWEB)
Shaginyan, V.R. [Petersburg Nuclear Physics Institute, RAS, Gatchina 188300 (Russian Federation); Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)], E-mail: vrshag@thd.pnpi.spb.ru; Amusia, M.Ya. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Popov, K.G. [Komi Science Center, Ural Division, RAS, Syktyvkar 167982 (Russian Federation)
2009-06-15
Basing on the density functional theory of fermion condensation, we analyze the non-Fermi liquid behavior of strongly correlated Fermi-systems such as heavy-fermion metals. When deriving equations for the effective mass of quasiparticles, we consider solids with a lattice and homogeneous systems. We show that the low-temperature thermodynamic and transport properties are formed by quasiparticles, while the dependence of the effective mass on temperature, number density, magnetic fields, etc., gives rise to the non-Fermi liquid behavior. Our theoretical study of the heat capacity, magnetization, energy scales, the longitudinal magnetoresistance and magnetic entropy are in good agreement with the remarkable recent facts collected on the heavy-fermion metal YbRh{sub 2}Si{sub 2}.
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International Nuclear Information System (INIS)
Shaginyan, V.R.; Amusia, M.Ya.; Popov, K.G.
2009-01-01
Basing on the density functional theory of fermion condensation, we analyze the non-Fermi liquid behavior of strongly correlated Fermi-systems such as heavy-fermion metals. When deriving equations for the effective mass of quasiparticles, we consider solids with a lattice and homogeneous systems. We show that the low-temperature thermodynamic and transport properties are formed by quasiparticles, while the dependence of the effective mass on temperature, number density, magnetic fields, etc., gives rise to the non-Fermi liquid behavior. Our theoretical study of the heat capacity, magnetization, energy scales, the longitudinal magnetoresistance and magnetic entropy are in good agreement with the remarkable recent facts collected on the heavy-fermion metal YbRh 2 Si 2 .
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Phase diagram of strongly correlated Fermi systems
International Nuclear Information System (INIS)
Zverev, M.V.; Khodel', V.A.; Baldo, M.
2000-01-01
Phase transitions in uniform Fermi systems with repulsive forces between the particles caused by restructuring of quasiparticle filling n(p) are analyzed. It is found that in terms of variables, i.e. density ρ, nondimensional binding constant η, phase diagram of a strongly correlated Fermi system for rather a wide class of interactions reminds of a puff-pastry pie. Its upper part is filled with fermion condensate, the lower one - with normal Fermi-liquid. They are separated by a narrow interlayer - the Lifshits phase, characterized by the Fermi multibound surface [ru
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NASA Resources for Educators and Public
Morales, Lester
2012-01-01
A variety of NASA Classroom Activities, Educator Guides, Lithographs, Posters and more are available to Pre ]service and In ]service Educators through Professional Development Workshops. We are here for you to engage, demonstrate, and facilitate the use of educational technologies, the NASA Website, NASA Education Homepage and more! We are here for you to inspire you by providing in-service and pre- service training utilizing NASA curriculum support products. We are here for you to partner with your local, state, and regional educational organizations to better educate ALL! NASA AESP specialists are experienced professional educators, current on education issues and familiar with the curriculum frameworks, educational standards, and systemic architecture of the states they service. These specialists provide engaging and inspiring student presentations and teacher training right at YOUR school at no cost to you! Experience free out-of-this-world interactive learning with NASA's Digital Learning Network. Students of all ages can participate in LIVE events with NASA Experts and Education Specialists. The Exploration Station provides NASA educational programs that introduce the application of Science, Technology, Engineering, & Mathematics, to students. Students participate in a variety of hands-on activities that compliment related topics taught by the classroom teacher. NASA KSC ERC can create Professional Development Workshops for teachers in groups of fifteen or more. Education/Information Specialists also assist educators in developing lessons to meet Sunshine State and national curriculum standards.
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The potential of hospital Website marketing.
Sanchez, P M
2000-01-01
In recent years, hospital website marketing has witnessed explosive growth. Industry experts cite an almost 100% growth in hospital website marketing over the last several years. At one time lagging in the adoption of Internet technology, hospitals have now begun making significant strides in catching up with other industries. In spite of the general proliferation of hospital websites, however, the full potential of the Internet with its unique characteristics has yet to be realized. In this paper, current trends fueling the growth of hospital website marketing are first explored. Secondly, barriers to realizing the potential of website marketing are investigated. Finally, recommendations for improving hospital website marketing are developed.
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After APOD: From the Website to the Classroom and Beyond
Wilson, Teresa; APOD
2017-01-01
Astronomy Picture of the Day (APOD) images may start on the apod.nasa.gov website, but their reach goes much further than the individual sitting at their computer screen. They provoke questions that then prompts the reader to email the authors; teachers use the images in their classrooms; students use them in their projects. This presentation will take a look at some of the work done using APOD images and text, including public outreach via middle school presentations and email communications, and academic uses beyond astronomy such as lesson plans on atmospheric refraction and even plagiarism, copyright and fair use.
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Experience of maintaining laboratory educational website's sustainability.
Dimenstein, Izak B
2016-01-01
Laboratory methodology websites are specialized niche websites. The visibility of a niche website transforms it into an authority site on a particular "niche of knowledge." This article presents some ways in which a laboratory methodology website can maintain its sustainability. The optimal composition of the website includes a basic content, a blog, and an ancillary part. This article discusses experimenting with the search engine optimization query results page. Strategic placement of keywords and even phrases, as well as fragmentation of the post's material, can improve the website's visibility to search engines. Hyperlinks open a chain reaction of additional links and draw attention to the previous posts. Publications in printed periodicals are a substantial part of a niche website presence on the Internet. Although this article explores a laboratory website on the basis of our hands-on expertise maintaining "Grossing Technology in Surgical Pathology" (www.grossing-technology.com) website with a high volume of traffic for more than a decade, the recommendations presented here for developing an authority website can be applied to other professional specialized websites. The authority websites visibility and sustainability are preconditions for aggregating them in a specialized educational laboratory portal.
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Spin interaction with an ideal fermi gas
International Nuclear Information System (INIS)
Aizenstadt, V.V.; Malyshev, V.A.
1987-01-01
The authors consider the equilibrium dynamics of a system consisting of a spin interacting with an ideal Fermi gas on the lattice Z/sup v, v ≥ 3. They present two examples; when this system is unitarily equivalent to an ideal Fermi gas or to a spin in an ideal Fermi gas without interactions between them
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Conoscere Fermi nel centenario della nascita : 29 settembre 1901 - 2001
Bonolis, Luisa
2001-01-01
Il lavoro scientifico di Fermi riguarda molti campi disparati, ciascuno dei quali ha avuto uno sviluppo peculiare in tempi successivi alla morte. In questo volume un certo numero di specialisti contemporanei di ciascun settore espone in forma semplice l'idea originaria e la sua successiva evoluzione. INDICE. Carlo Bernardini, "Introduzione"; Giorgio Salvini, "Enrico Fermi. La sua vita, ed un commento alla sua opera"; Edoardo Amaldi, "Commemorazione del Socio Enrico Fermi"; Enrico Persico, "Commemorazione di Enrico Fermi"; Franco Rasetti, "Enrico Fermi e la Fisica Italiana"; Franco Bassani, "Enrico Fermi e la Fisica dello Stato Solido"; Giorgio Parisi, "La statistica di Fermi"; Giovanni Gallavotti, "La meccanica classica e la rivoluzione quantistica nei lavori giovanili di Fermi"; Tullio Levi-Civita, "Sugli invarianti adiabatici"; Bruno Bertotti, "Le coordinate di Fermi e il Principio di Equivalenza"; Marcello Cini, "Fermi e l'elettrodinamica quantistica"; Nicola Cabibbo. "Le interazioni deboli"; Ugo Amaldi, "...
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Nonlocal Poisson-Fermi model for ionic solvent.
Xie, Dexuan; Liu, Jinn-Liang; Eisenberg, Bob
2016-07-01
We propose a nonlocal Poisson-Fermi model for ionic solvent that includes ion size effects and polarization correlations among water molecules in the calculation of electrostatic potential. It includes the previous Poisson-Fermi models as special cases, and its solution is the convolution of a solution of the corresponding nonlocal Poisson dielectric model with a Yukawa-like kernel function. The Fermi distribution is shown to be a set of optimal ionic concentration functions in the sense of minimizing an electrostatic potential free energy. Numerical results are reported to show the difference between a Poisson-Fermi solution and a corresponding Poisson solution.
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Fermi: a physicist in the upheaval
International Nuclear Information System (INIS)
Maria, M. de
2002-01-01
This book summarizes the life, works and complex personality of the Italian physicist Enrico Fermi (1901-1954) whose myth is linked with the political upheaval of the 2. world war: the youth of an autodidact, the theorician and the quantum mechanics, his invention of a quantum statistics, the weak interaction theory, his works on artificial radioactivity, the end of the Fermi team and his exile in the USA, the secrete researches at the university of Columbia and the birth of the first atomic 'pile' (December 2, 1942), the building of Los Alamos center and the Alamogordo explosion test, the disagreements among the physicists of the Manhattan project and the position of Fermi, Fermi's contribution in the H-bomb construction, the creation of the physics school of Chicago, the Oppenheimer spying affair. (J.S.)
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Enrico Fermi and uranium fission
International Nuclear Information System (INIS)
Hahn, O.
1962-01-01
The author describes the part of his scientific work connected to the research made by Enrico Fermi in the field of nuclear reactions. He said that 'Our gratitude to Fermi today is therefore due less perhaps for his reactor than for his experiments using uncharged neutrons in order to bring about artificial nuclear processes'
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Induced interactions in a superfluid Bose-Fermi mixture
DEFF Research Database (Denmark)
Kinnunen, Jami; Bruun, Georg
2015-01-01
We analyze a Bose-Einstein condensate (BEC) mixed with a superfluid two-component Fermi gas in the whole BCS-BEC crossover. Using a quasiparticle random-phase approximation combined with Beliaev theory to describe the Fermi superfluid and the BEC, respectively, we show that the single-particle an......We analyze a Bose-Einstein condensate (BEC) mixed with a superfluid two-component Fermi gas in the whole BCS-BEC crossover. Using a quasiparticle random-phase approximation combined with Beliaev theory to describe the Fermi superfluid and the BEC, respectively, we show that the single...... shift in the excitation spectrum of the BEC. In addition, the excitation of quasiparticles in the Fermi superfluid leads to damping of the excitations in the BEC. Besides studying induced interactions themselves, we can use these prominent effects to systematically probe the strongly interacting Fermi...
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Relativistic effects in the Thomas--Fermi atom
International Nuclear Information System (INIS)
Waber, J.T.; Canfield, J.M.
1975-01-01
Two methods of applying relativistic corrections to the Thomas--Fermi atom are considered, and numerical calculations are discussed. Radial charge distributions calculated from a relativistic Thomas--Fermi equation agree in gross form with those from more complicated self-consistent calculations. Energy eigenvalues for mercury, as determined from the relativistic Thomas--Fermi solution, are compared with other calculated and experimental values
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Legal Aspects of a School Library Website
Johnson, Tom
2009-01-01
School library websites enhance and explain the services provided by the library. Most schools have a library website. Jurkowski (2004) reviewed thirty-four school library websites and ranked the most common features: website links, databases, policies, Online Public Access Catalog (OPAC), and websites by subject. These features give patrons a…
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The Fermiac or Fermi's Trolley
Coccetti, F.
2016-03-01
The Fermiac, known also as Fermi's trolley or Monte Carlo trolley, is an analog computer used to determine the change in time of the neutron population in a nuclear device, via the Monte Carlo method. It was invented by Enrico Fermi and constructed by Percy King at Los Alamos in 1947, and used for about two years. A replica of the Fermiac was built at INFN mechanical workshops of Bologna in 2015, on behalf of the Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", thanks to the original drawings made available by Los Alamos National Laboratory (LANL). This reproduction of the Fermiac was put in use, and a simulation was developed.
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Elling, Sanne; Lentz, Leo; de Jong, Menno D.T.; van den Bergh, Huub
2012-01-01
The quality of governmental websites is often measured with questionnaires that ask users for their opinions on various aspects of the website. This article presents the Website Evaluation Questionnaire (WEQ), which was specifically designed for the evaluation of governmental websites. The
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Radio core dominance of Fermi blazars
Pei, Zhi-Yuan; Fan, Jun-Hui; Liu, Yi; Yuan, Yi-Hai; Cai, Wei; Xiao, Hu-Bing; Lin, Chao; Yang, Jiang-He
2016-07-01
During the first 4 years of mission, Fermi/LAT detected 1444 blazars (3FGL) (Ackermann et al. in Astrophys. J. 810:14, 2015). Fermi/LAT observations of blazars indicate that Fermi blazars are luminous and strongly variable with variability time scales, for some cases, as short as hours. Those observations suggest a strong beaming effect in Fermi/LAT blazars. In the present work, we will investigate the beaming effect in Fermi/LAT blazars using a core-dominance parameter, R = S_{core}/ S_{ext.}, where S_{core} is the core emission, while S_{ext.} is the extended emission. We compiled 1335 blazars with available core-dominance parameter, out of which 169 blazars have γ-ray emission (from 3FGL). We compared the core-dominance parameters, log R, between the 169 Fermi-detected blazars (FDBs) and the rest non-Fermi-detected blazars (non-FDBs), and we found that the averaged values are R+(2.25±0.10), suggesting that a source with larger log R has larger V.I. value. Thirdly, we compared the mean values of radio spectral index for FDBs and non-FDBs, and we obtained < α_{radio}rangle =0.06±0.35 for FDBs and < α_{radio}rangle =0.57±0.46 for non-FDBs. If γ-rays are composed of two components like radio emission (core and extended components), then we can expect a correlation between log R and the γ-ray spectral index. When we used the radio core-dominance parameter, log R, to investigate the relationship, we found that the spectral index for the core component is α_{γ}|_{core} = 1.11 (a photon spectral index of α_{γ}^{ph}|_{core} = 2.11) and that for the extended component is α_{γ}|_{ext.} = 0.70 (a photon spectral index of α_{γ}^{ph}|_{ext.} = 1.70). Some discussions are also presented.
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Fermi and the Art of Estimation
Indian Academy of Sciences (India)
IAS Admin
The balance wheel will now shed some ... work best when used by someone with the ... [1] Laura Fermi, Atoms in the Family: My Life with Enrico Fermi, The. University of Chicago ... Geneva, European Organization for Nuclear Research, 1969.
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Quality and content of dental practice websites.
Nichols, L C; Hassall, D
2011-04-09
To investigate the quality and content of dental practice websites by constructing an audit framework based on regulations, guidance and expert advice, and applying this framework to a random sample of UK dental practices' websites. An audit framework was constructed and in-depth data collected from a random sample of 150 UK dental practices. Thirty-five percent of dental practices in this study were found to have websites. Compliance with rules and regulations regarding dental practice websites was generally poor. Use of advised content for practice promotion was variable. Many websites were poorly optimised. Eighty-nine percent of the websites advertised tooth whitening, despite the issues surrounding its legality; 25% of the websites advertised Botox even though advertising of prescription only medicines is illegal. Some websites gave misleading information about the specialist status of their dentists. Those responsible for dental practice websites need to be aware of a wide range of regulations and guidance, and are advised to follow expert advice on content and optimisation in order to maximise the potential of their websites.
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Jensen, Todd A
2006-01-01
For anyone buying a new car, restoring an old favorite, collecting license plates or looking for motorsports information, the internet is the place to go and this is the book to help you get there. Now with over 650 internet addresses, this expanded and updated guide provides detailed descriptions and reviews of the biggest, best and most interesting automotive websites on the net. Beginning with a brief internet history and helpful hints, it aids the novice (or not so novice) user in picking through the countless automotive sites on the internet. Websites are arranged by topics such as afterm
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Fermi arc mediated entropy transport in topological semimetals
McCormick, Timothy M.; Watzman, Sarah J.; Heremans, Joseph P.; Trivedi, Nandini
2018-05-01
The low-energy excitations of topological Weyl semimetals are composed of linearly dispersing Weyl fermions that act as monopoles of Berry curvature in the bulk momentum space. Furthermore, on the surface there exist topologically protected Fermi arcs at the projections of these Weyl points. We propose a pathway for entropy transport involving Fermi arcs on one surface connecting to Fermi arcs on the other surface via the bulk Weyl monopoles. We present results for the temperature and magnetic field dependence of the magnetothermal conductance of this conveyor belt channel. The circulating currents result in a net entropy transport without any net charge transport. We provide results for the Fermi arc mediated magnetothermal conductivity in the low-field semiclassical limit as well as in the high-field ultraquantum limit, where only chiral Landau levels are involved. Our work provides a proposed signature of Fermi arc mediated magnetothermal transport and sets the stage for utilizing and manipulating the topological Fermi arcs in thermal applications.
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Large optical conductivity of Dirac semimetal Fermi arc surface states
Shi, Li-kun; Song, Justin C. W.
2017-08-01
Fermi arc surface states, a hallmark of topological Dirac semimetals, can host carriers that exhibit unusual dynamics distinct from that of their parent bulk. Here we find that Fermi arc carriers in intrinsic Dirac semimetals possess a strong and anisotropic light-matter interaction. This is characterized by a large Fermi arc optical conductivity when light is polarized transverse to the Fermi arc; when light is polarized along the Fermi arc, Fermi arc optical conductivity is significantly muted. The large surface spectral weight is locked to the wide separation between Dirac nodes and persists as a large Drude weight of Fermi arc carriers when the system is doped. As a result, large and anisotropic Fermi arc conductivity provides a novel means of optically interrogating the topological surfaces states of Dirac semimetals.
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Collapse and revival of the Fermi sea in a Bose-Fermi mixture
Iyer, Deepak; Will, Sebastian; Rigol, Marcos
2014-05-01
The collapse and revival of quantum fields is one of the most pristine forms of coherent quantum dynamics far from equilibrium. Until now, it has only been observed in the dynamical evolution of bosonic systems. We report on the first observation of the boson mediated collapse and revival of the Fermi sea in a Bose-Fermi mixture. Specifically, we present a simple model which captures the experimental observations shown in the talk titled Observation of Collapse and Revival Dynamics in the Fermionic Component of a Lattice Bose-Fermi Mixture by Sebastian Will. Our theoretical analysis shows why the results are robust to the presence of harmonic traps during the loading or the time evolution phase. It also makes apparent that the fermionic dynamics is independent of whether the bosonic component consists of a coherent state or localized Fock states with random occupation numbers. Because of the robustness of the experimental results, we argue that this kind of collapse and revival experiment can be used to accurately characterize interactions between bosons and fermions in a lattice.
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Bright solitons in Bose-Fermi mixtures
International Nuclear Information System (INIS)
Karpiuk, Tomasz; Brewczyk, Miroslaw; RzaPewski, Kazimierz
2006-01-01
We consider the formation of bright solitons in a mixture of Bose and Fermi degenerate gases confined in a three-dimensional elongated harmonic trap. The Bose and Fermi atoms are assumed to effectively attract each other whereas bosonic atoms repel each other. Strong enough attraction between bosonic and fermionic components can change the character of the interaction within the bosonic cloud from repulsive to attractive making thus possible the generation of bright solitons in the mixture. On the other hand, such structures might be in danger due to the collapse phenomenon existing in attractive gases. We show, however, that under some conditions (defined by the strength of the Bose-Fermi components attraction) the structures which neither spread nor collapse can be generated. For elongated enough traps the formation of solitons is possible even at the 'natural' value of the mutual Bose-Fermi ( 87 Rb- 40 K in our case) scattering length
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An audit of alcohol brand websites.
Gordon, Ross
2011-11-01
The study investigated the nature and content of alcohol brand websites in the UK. The research involved an audit of the websites of the 10 leading alcohol brands by sales in the UK across four categories: lager, spirits, Flavoured Alcoholic Beverages and cider/perry. Each site was visited twice over a 1-month period with site features and content recorded using a pro-forma. The content of websites was then reviewed against the regulatory codes governing broadcast advertising of alcohol. It was found that 27 of 40 leading alcohol brands had a dedicated website. Sites featured sophisticated content, including sports and music sections, games, downloads and competitions. Case studies of two brand websites demonstrate the range of content features on such sites. A review of the application of regulatory codes covering traditional advertising found some content may breach the codes. Study findings illustrate the sophisticated range of content accessible on alcohol brand websites. When applying regulatory codes covering traditional alcohol marketing channels it is apparent that some content on alcohol brand websites would breach the codes. This suggests the regulation of alcohol brand websites may be an issue requiring attention from policymakers. Further research in this area would help inform this process. © 2010 Australasian Professional Society on Alcohol and other Drugs.
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Thomas-Fermi molecular dynamics
International Nuclear Information System (INIS)
Clerouin, J.; Pollock, E.L.; Zerah, G.
1992-01-01
A three-dimensional density-functional molecular-dynamics code is developed for the Thomas-Fermi density functional as a prototype for density functionals using only the density. Following Car and Parrinello [Phys. Rev. Lett. 55, 2471 (1985)], the electronic density is treated as a dynamical variable. The electronic densities are verified against a multi-ion Thomas-Fermi algorithm due to Parker [Phys. Rev. A 38, 2205 (1988)]. As an initial application, the effect of electronic polarization in enhancing ionic diffusion in strongly coupled plasmas is demonstrated
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Enrico Fermi significato di una scoperta
2001-01-01
Questo volume è la riedizione, rinnovata ed ampliata, del volume "Enrico Fermi. Significato di una scoperta" edito dal FIEN (Forum Italiano dell'Energia Nucleare) nel 1982 e nel 1992 in occasione, rispettivamente, del 40mo e del 50mo anniversario della pila di Fermi.
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International Nuclear Information System (INIS)
Sanpera, A.; Lewenstein, M.; Kantian, A.; Sanchez-Palencia, L.; Zakrzewski, J.
2004-01-01
We investigate strongly interacting atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices. We derive an effective Hamiltonian for the system and discuss its low temperature physics. We demonstrate the possibility of controlling the interactions at local level in inhomogeneous but regular lattices. Such a control leads to the achievement of Fermi glass, quantum Fermi spin-glass, and quantum percolation regimes involving bare and/or composite fermions in random lattices
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WARNA SEBAGAI IDENTITAS MEREK PADA WEBSITE
Directory of Open Access Journals (Sweden)
Wirania Swasty
2017-02-01
Full Text Available Abstrak Website merupakan salah satu alat komunikasi berupa pemasaran-online interaktif yang dirancang untuk melibatkan pelanggan agar dapat meningkatkan kesadaran dan citra merek, atau memicu penjualan produk dan jasa. Website relatif terjangkau terutama bagi Usaha Mikro Kecil dan Menengah (UMKM. Permasalahan yang dihadapi UMKM di antaranya lemahnya kegiatan branding dan promosi serta kurang ahli dalam penguasaan teknologi. Menjembatani hal ini, maka diperlukan studi mengenai identitas merek pada website. Studi ini bertujuan untuk memberikan pemahaman akan pemanfaatan warna dalam identitas merek yang diaplikasikan pada website perusahaan. Diharapkan studi ini dapat berguna bagi UMKM dalam membangun merek dan melakukan program pemasaran dengan memanfaatkan warna identitas.Studi diawali dengan pengumpulan data melalui tinjauan literatur terkait dengan warna dan desain antarmuka website. Observasi kemudian dilakukan pada tiga website (zananachips.com, sneaklinid.com, dan kandurastudio.com sebagai studi kasus, yang merupakan situs resmi UMKM dari Bandung. UMKM yang digunakan sebagai studi kasus dipilih secara acak dari berbagai industri (makanan, layanan, dan kerajinan. Kuesioner yang dibagikan kepada responden secara acak kepada warga Kota Bandung dan sekitarnya. Dari studi ini terungkap bahwa Zanana dinilai telah berhasil memanfaatkan peranan warna dalam membangun merek. Studi ini juga menyarankan bahwa penerapan warna yang konsisten juga dapat menjadi faktor penentu suatu sistem identitas visual. Kata Kunci: identitas, merek, UMKM, warna, website Abstract Website is one of communication tool in the form of interactive online marketing which is designed to engage the customer in order to increase awareness and brand image, or trigger sales of products and services. Website relatively affordable, especially for Small and Medium Enterprises (SMEs. The problem faced by SMEs are weak branding and promotional activities as well as the lack of experts
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Four-fermi anomalous dimension with adjoint fermions
Del Debbio, Luigi; Ruano, Carlos Pena
2014-01-01
The four-fermi interaction can play an important role in models of strong dynamical EW sym- metry breaking if the anomalous dimensions of the four-fermi operators become large in the IR. We discuss a number of issues that are relevant for the nonperturbative computation of the four- fermi anomalous dimensions for the SU(2) gauge theory with two flavors of Dirac fermions in the adjoint representation, using a Schrödinger functional formalism.
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The Successful Synergy of Swift and Fermi/GBM in Magnetars
Kouveliotou, Chryssa
2011-01-01
The magnetar rate of discovery has increased dramatically in the last decade. Five sources were discovered in the last three years alone as a result of the very efficient synergy among three X- and .gamma-ray instruments on NASA satellites: the Swift/Burst Alert Telescope (BAT), the Fermi/Gamma ray Burst Monitor (GBM), and the Rossi X-Ray Timing Explorer; RXTE/Proportional Counter Array (PCA). To date, there are approx. 25 magnetar candidates, of which two are (one each) in the Large and Small Magellanic Cloud and the rest reside on the Galactic plane of our Milky Way. I will discuss here the main properties of the Magnetar Population and the common projects that can be achieved with the synergy of Swift and GBM.
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Science@NASA: Direct to People Via the Internet
Koczor, R. J.; Phillips, T.; Whitaker, Ann F. (Technical Monitor)
2001-01-01
NASA's founding charter includes the requirement for reporting all scientific results to the public. This requirement is based on the principal that the exploration of space results in real benefits to humanity and that those benefits are to be shared as widely as practical. When NASA was founded, the traditional education and outreach methods were through the news media and the formal and informal (museums, planetariums exhibits, etc.) educational communities. With the nearly ubiquitous availability of the Internet, a third choice presents itself: communicating directly with individuals in their homes. This powerful approach offers benefits and pitfalls that must be addressed to be effective. This paper covers an integrated approach to providing high quality NASA research information to multiple audiences via a family of websites. The paper discuss the content generation, review, and production process and provide metrics on evaluating the results.
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Fermi's Conundrum: Proliferation and Closed Societies
Teller, Wendy; Westfall, Catherine
2007-04-01
On January 1, 1946 Emily Taft Douglas, a freshman Representative at Large for Illinois, sent a letter to Enrico Fermi. She wanted to know whether, if atomic energy was used for peaceful purposes, it might be possible to clandestinely divert some material for bombs. Douglas first learned about the bomb not quite five months before when Hiroshima was bombed. Even though she was not a scientist she identified a key problem of the nuclear age. Fermi responded with requirements to allow peaceful uses of atomic energy and still outlaw nuclear weapons. First, free interchange of information between people was required, and second, people who reported possible violations had to be protected. Fermi had lived in Mussolini's Italy and worked under the war time secrecy restrictions of the Manhattan Project. He was not optimistic that these conditions could be met. This paper discusses how Douglas came to recognize the proliferation issue and what led Fermi to his solution and his pessimism about its practicality.
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Pseudogap phenomena in ultracold atomic Fermi gases
Chen, Qijin; Wang, Jibiao
2014-01-01
The pairing and superfluid phenomena in a two-component ultracold atomic Fermi gas is an analogue of Cooper pairing and superconductivity in an electron system, in particular, the high $T_c$ superconductors. Owing to the various tunable parameters that have been made accessible experimentally in recent years, atomic Fermi gases can be explored as a prototype or quantum simulator of superconductors. It is hoped that, utilizing such an analogy, the study of atomic Fermi gases may shed light to ...
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Yavari, H.; Mokhtari, M.
2014-03-01
The effects of impurity and Bose-Fermi interactions on the transition temperature of a dipolar Bose-Einstein condensation in trapped Bose-Fermi mixture, by using the two-fluid model, are investigated. The shift of the transition temperature consists of four contributions due to contact, Bose-Fermi, dipole-dipole, and impurity interactions. We will show that in the presence of an anisotropic trap, the Bose-Fermi correction to the shift of transition temperature due to the excitation spectra of the thermal part is independent of anisotropy factor. Applying our results to trapped Bose-Fermi mixtures shows that, by knowing the impurity effect, the shift of the transition temperature due to Bose-Fermi interaction could be measured for isotropic trap (dipole-dipole contributions is zero) and Feshbach resonance technique (contact potential contribution is negligible).
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Theoretical Foundations for Website Design Courses.
Walker, Kristin
2002-01-01
Considers how theoretical foundations in website design courses can facilitate students learning the genres of Internet communication. Proposes ways that theories can be integrated into website design courses. Focuses on two students' website portfolios and ways they utilize genre theory and activity theory discussed in class to produce websites…
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Strongly interacting Fermi gases
Directory of Open Access Journals (Sweden)
Bakr W.
2013-08-01
Full Text Available Strongly interacting gases of ultracold fermions have become an amazingly rich test-bed for many-body theories of fermionic matter. Here we present our recent experiments on these systems. Firstly, we discuss high-precision measurements on the thermodynamics of a strongly interacting Fermi gas across the superfluid transition. The onset of superfluidity is directly observed in the compressibility, the chemical potential, the entropy, and the heat capacity. Our measurements provide benchmarks for current many-body theories on strongly interacting fermions. Secondly, we have studied the evolution of fermion pairing from three to two dimensions in these gases, relating to the physics of layered superconductors. In the presence of p-wave interactions, Fermi gases are predicted to display toplogical superfluidity carrying Majorana edge states. Two possible avenues in this direction are discussed, our creation and direct observation of spin-orbit coupling in Fermi gases and the creation of fermionic molecules of 23Na 40K that will feature strong dipolar interactions in their absolute ground state.
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Measuring Design Metrics In Websites
Navarro, Emilio; Fitzpatrick, Ronan
2011-01-01
The current state of the World Wide Web demands website designs that engage consumers in order to allow them to consume services or generate leads to maximize revenue. This paper describes a software quality factor to measure the success of websites by analyzing web design structure and not relying only on websites traffic data. It is also documents the requirements and architecture to build a software tool that measures criteria for determining Engagibility. A new set of social crit...
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Tinjauan Desain Website Kemlu.Go.Id
Danu Widhyatmoko
2013-01-01
Review of kemlu.go.id website design is a research report on Kemlu.go.id website design. Kemlu.go.id website aims to be the information gateway of Ministry of Foreign Affairs, and also as guidelines of foreign politic policies of Republic of Indonesia. The review had been accomplished by using analytical method based on the "Nine Essential Principles for Good Web Design" developed by Collis Ta'eed (2007). At the end of the article, several recommendations in developing kemlu.go.id website are...
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Pro CSS for High Traffic Websites
Kennedy, A
2011-01-01
Although web standards-based websites can scale effectively - and basic CSS will give you basic results - there are considerations and obstacles that high traffic websites must face to keep your development and hosting costs to a minimum. There are many tips and tricks, as well as down-to-earth best practice information, to make sure that everything runs quickly and efficiently with the minimum amount of fuss or developer intervention. Targeted at "high traffic" websites - those receiving over 10,000 unique visitors a day - Pro CSS for High Traffic Websites gives you inside informati
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Tinjauan Desain Website Kemlu.Go.Id
Directory of Open Access Journals (Sweden)
Danu Widhyatmoko
2013-04-01
Full Text Available Review of kemlu.go.id website design is a research report on Kemlu.go.id website design. Kemlu.go.id website aims to be the information gateway of Ministry of Foreign Affairs, and also as guidelines of foreign politic policies of Republic of Indonesia. The review had been accomplished by using analytical method based on the "Nine Essential Principles for Good Web Design" developed by Collis Ta'eed (2007. At the end of the article, several recommendations in developing kemlu.go.id website are presented to create better appearance.
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Public Websites and Human–computer Interaction
DEFF Research Database (Denmark)
Sørum, Hanne; Andersen, Kim Normann; Vatrapu, Ravi
2012-01-01
system use by representatives. A Pearson correlation analysis of user evaluation from 296 websites that participated in the Danish web award Bedst på Nettet (‘Top of the Web’) showed no significant positive correlation between website quality and user satisfaction. We put forward recommendations...... for further investigation: (1) inclusion of real users (citizens and businesses) in real-use setting in the evaluation process could help move forward the understanding of the relationship between website quality and end-user satisfaction; (2) the lack of correlation between website quality and user...
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Directory of Open Access Journals (Sweden)
Kim Ming
2014-01-01
Full Text Available The purpose of this study is to evaluate livingetcindonesia.com website, in order to improve user satisfaction as an online media and the extent to which the level of user satisfaction to the presentation of the website. The website criteria: perceived usefulness, ease of use, ease of finding information, and the design/layout of page is examined to determine the effect on user satisfaction. Analysis of site infrastructure has been meeting the needs of web and database servers, database structure, web analytics to determine the user visits the website and area/location where a user visiting the website. The survey results showed variable Perceived usefullness, Ease of use, Ease of finding information, and Design/Layout of page significant effect on user satisfaction.
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Cosmetic websites Scotland: legal or lurid.
Gunn, Eilidh G M; Loh, Charles Yuen Yung; Athanassopoulos, Thanassi
2014-08-01
The provision of cosmetic interventions and their advertising have recently come under intense scrutiny in the wake of the PIP scandal and Keogh report. A study of Scottish websites offering esthetic procedures was conducted to determine adherence to the advertising standards and regulations currently in place. Regulations are provided by the Advertising Standards Authority, Committee on Advertising Practice, Independent Healthcare Advisory Services and General Medical Council. An Internet search was then conducted to search for providers of non-surgical and surgical cosmetic procedures. Overall 125 websites were reviewed. 109 local and 16 national with 17 websites associated with cosmetic surgeons. 26 websites failed to adhere to regulations. Failure was related to advertising of POM on the homepage or dropdown menu (20), offering enticements inappropriately (6). 26.6% of websites did not display qualifications of the practitioners. Only 16.6% of websites described the specific and the non-specific side effects of "anti-wrinkle injections" and only 12.5% mentioned alternative treatments. The majority of websites reviewed adhered to current advertising standards. Plastic surgeons provide a small percentage of cosmetic procedures. Greater regulation at the point of product entry and of all esthetic practitioners is required. Crown Copyright © 2014. Published by Elsevier Ltd. All rights reserved.
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International Nuclear Information System (INIS)
Alcober Bosch, V.
2003-01-01
Following the scientific life of Fermi the article reviews the historical evolution of nuclear security from the base of the first system foreseen for the CP-1 critical pile, which made it possible to demonstrate self-sustaining fission reaction, until the mid-fifties by which time the subsequent importance of this concept was perceived. Technological advances have gone hand in hand with the development of the concept of security, and have become a further point to be taken into account in any nuclear installation, and which Fermi always kept in mind during his professional life. (Author) 12 refs
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Holographic Fermi and Non-Fermi Liquids with Transitions in Dilaton Gravity
Iizuka, Norihiro; Narayan, Prithvi; Trivedi, Sandip P
2012-01-01
We study the two-point function for fermionic operators in a class of strongly coupled systems using the gauge-gravity correspondence. The gravity description includes a gauge field and a dilaton which determines the gauge coupling and the potential energy. Extremal black brane solutions in this system typically have vanishing entropy. By analyzing a charged fermion in these extremal black brane backgrounds we calculate the two-point function of the corresponding boundary fermionic operator. We find that in some region of parameter space it is of Fermi liquid type. Outside this region no well-defined quasi-particles exist, with the excitations acquiring a non-vanishing width at zero frequency. At the transition, the two-point function can exhibit non-Fermi liquid behaviour.
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Website Design and Localisation: A Content Analysis of Malaysian Universities Websites
Ahmed, Tanveer; Mouratidis, Haralambos; Preston, David
2008-01-01
Design of a neutral and universal website for all countries and cultures is yet a challenging task. It appears that there is a need for a local website to address a particular culture. To some extent, culture dimensions can be applied to identify differences amongst cultures that may have an effect on how people make decisions. This study is a form of continuation of the previous study (Ahmed, Mouratidis and Preston, 2007). It applies simultaneously Hofstede’s individualism/collectivism, powe...
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International Nuclear Information System (INIS)
Omran, Ahmed
2016-01-01
This thesis reports on a novel quantum gas microscope to investigate many-body systems of fermionic atoms in optical lattices. Single-site resolved imaging of ultracold lattice gases has enabled powerful studies of bosonic quantum many-body systems. The extension of this capability to Fermi gases offers new prospects to studying complex phenomena of strongly correlated systems, for which numerical simulations are often out of reach. Using standard techniques of laser cooling, optical trapping, and evaporative cooling, ultracold Fermi gases of 6 Li are prepared and loaded into a large-scale 2D optical lattice of flexible geometry. The atomic distribution is frozen using a second, short-scaled lattice, where we perform Raman sideband cooling to induce fluorescence on each atom while maintaining its position. Together with high-resolution imaging, the fluorescence signals allow for reconstructing the initial atom distribution with single-site sensitivity and high fidelity. Magnetically driven evaporative cooling in the plane allows for producing degenerate Fermi gases with almost unity filling in the initial lattice, allowing for the first microscopic studies of ultracold gases with clear signatures of Fermi statistics. By preparing an ensemble of spin-polarised Fermi gases, we detect a flattening of the density profile towards the centre of the cloud, which is a characteristic of a band-insulating state. In one set of experiments, we demonstrate that losses of atom pairs on a single lattice site due to light-assisted collisions are circumvented. The oversampling of the second lattice allows for deterministic separation of the atom pairs into different sites. Compressing a high-density sample in a trap before loading into the lattice leads to many double occupancies of atoms populating different bands, which we can image with no evidence for pairwise losses. We therefore gain direct access to the true number statistics on each lattice site. Using this feature, we can
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Directory of Open Access Journals (Sweden)
Santy Nurina Aprilia
2014-10-01
Full Text Available Latar Belakang Penelitian ini adalah semakin berkembangnya ilmu pengetahuan dan teknologi, pemerintah dituntut untuk lebih meningkatkan kinerja pelayanan public khususnya pelayanan publik berupa layanan elektronik atau e-service, khususnya dalam hal ini adalah website, dimana website pemerintah daerah diharapkan dapat menjadi media e-government sebagai sarana interaksi antara pemerintah dengan masyarakat maupun mempermudah layanan elektronik. Penulisan Tesis dengan judul “Efektivitas Website Sebagai Media E-government dalam Meningkatkan Pelayanan Elektronik Pemerintah Daerah (Studi Pada Pemerintah Daerah Kabupaten Jombang” merupakan sebuah studi dimana dalam penelitian ini diharapkan dapat mengetahui seberapa efektif website pemerintah daerah sebagai media e-government. Tujuan Penelitian ini adalah: Untuk menjelaskan dan menganalisis efektivitas website sebagai media e-government dalam meningkatkan pelayanan elektronik pemerintah daerah di Kabupaten Jombang; Untuk menjelaskan dan menganalisis faktor pendukung efektivitas website sebagai media e-government dalam meningkatkan pelayanan elektronik pemerintah daerah di Kabupaten Jombang; Untuk menjelaskan dan menganalisis faktor penghambat efektivitas website sebagai media e-government dalam meningkatkan pelayanan elektronik pemerintah daerah di Kabupaten Jombang. Hasil temuan di lapangan menunjukkan bahwa website Pemerintah Kabupaten Jombang telah efektif sebagai media pemberi informasi kepada masyarakat, namun belum efektif sebagai media dalam memberikan pelayanan publik secara elektronik (e-service seperti mendownload blangko, formulir, dll. Kata kunci: Efektivitas, E-government, E-service, Media, Teknologi Informasi, Website
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Astrobiology and Microbial Diversity Websites at MBL
Bahr, M.; Bordenstein, S. R.
2006-12-01
The NASA Astrobiology Institute (NAI) mission is to study the origin, evolution and future of life in the Universe. The MBL Astrobiology team explores the evolution and interaction of genomes of diverse organisms that play significant roles in environmental biology over evolutionary time scales. Communication about our research includes the personal contact of teacher workshops, and the development of web-based resources. Microbial Life Educational Resources (MLER) provides an expanding internet resource about the ecology, diversity and evolution for students, K-12 teachers, university faculty, and the general public. MLER includes websites, PowerPoint presentations, teaching activities, data sets, and other useful materials for creating or enhancing courses related to astrobiology. Our second site, micro*scope (http://microscope.mbl.edu), has images of microbes, classification schemes, descriptions of organisms, talks and other educational resources to improve awareness of the biodiversity of our microbial partners.
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Constructing corporate identities on websites
DEFF Research Database (Denmark)
Bøilerehauge, Dorrit
2007-01-01
En analyse og diskussion af hvorledes internationale virksomheder konstruerer deres identitet på deres corporate websites.......En analyse og diskussion af hvorledes internationale virksomheder konstruerer deres identitet på deres corporate websites....
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Tao, Donghua; LeRouge, Cynthia; Smith, K Jody; De Leo, Gianluca
2017-10-06
Today's health care environment encourages health care consumers to take an active role in managing their health. As digital natives, young educated adults do much of their health information management through the Internet and consider it a valid source of health advice. However, the quality of information on health websites is highly variable and dynamic. Little is known about the understandings and perceptions that young educated adults have garnered on the quality of information on health websites used for health care-related purposes. To fill this gap, the aim of this study was to develop a conceptual framework of health website information quality with quality dimensions (ie, criteria) and associated quality drivers (ie, attributes) specified in the context of young educated adults' use of health websites for health care-related purposes. This aim was achieved by (1) identifying information quality dimensions of health websites from the perspective of young educated adults; (2) identifying the importance ratings of these quality dimensions; and (3) constructing a framework of health website information quality with quality dimensions and associated drivers specified in the context of young educated adults' use of health websites for health care-related purposes. The study employed both qualitative and quantitative methods. Methods included semistructured group interviews and an individual quality assessment exercise grounded in visiting various websites and responding to Likert scale questions regarding the importance ratings of information quality dimensions and open-ended questions with specifying website quality drivers. Study participants included junior and senior undergraduate and graduate students in business, allied health, and public health majors. Qualitative, open-coding procedures were used to develop the conceptual framework reflecting the participants' means of assessing information quality on health websites. Five dimensions of information
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KLASIFIKASI WEBSITE MENGGUNAKAN ALGORITMA MULTILAYER PERCEPTRON
Directory of Open Access Journals (Sweden)
Nyoman Purnama
2014-12-01
Full Text Available Sistem klasifikasi merupakan proses temu balik informasi yang sangat bergantung dari elemen-elemen penyusunnya.Sistem ini banyak digunakan untuk mengatasi permasalahan segmentasi data. Klasifikasi dapat digunakan pada website sebagaimetode untuk mengelompokkan website. Website merupakan salah satu data yang memiliki informasi yang beraneka-ragam,sehingga pengelompokan data ini penting untuk diteliti. Sistem klasifikasi dimulai dengan melakukan proses pengumpulaninformasi dari halaman website (parsing dan untuk setiap hasil parsing dilakukan proses penghapusan kata henti, stemming,feature selection dengan tf-idf. Hasil dari proses ini berupa fitur yang menjadi inputan algoritma Multilayer Perceptron. Dalamalgoritma ini terjadi proses pembelajaran terhadap pola input masukan dan pembuatan bobot pelatihan. Bobot ini akandigunakan pada proses klasifikasi. Hasil dari penelitian menunjukkan bahwa algoritma Multilayer Perceptron dapatmenghasilkan klasifikasi website dengan akurasi yang bagus. Hal ini dibuktikan dengan beberapa tahapan penelitian yangberbeda dan didapatkan nilai akurasi rata-rata diatas 70%.
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An effective quality model for evaluating mobile websites
International Nuclear Information System (INIS)
Hassan, W.U.; Nawaz, M.T.; Syed, T.H.; Naseem, A.
2015-01-01
The Evolution in Web development in recent years has caused emergence of new area of mobile computing, Mobile phone has been transformed into high speed processing device capable of doing the processes which were suppose to be run only on computer previously, Modem mobile phones now have capability to process data with greater speed then desktop systems and with the inclusion of 3G and 4G networks, mobile became the prime choice for users to send and receive data from any device. As a result, there is a major increase in mobile website need and development but due to uniqueness of mobile website usage as compared to desktop website, there is a need to focus on quality aspect of mobile website, So, to increase and preserve quality of mobile website, a quality model is required which has to be designed specifically to evaluate mobile website quality, To design a mobile website quality model, a survey based methodology is used to gather the information regarding website unique usage in mobile from different users. On the basis of this information, a mobile website quality model is presented which aims to evaluate the quality of mobile websites. In proposed model, some sub characteristics are designed to evaluate mobile websites in particular. The result is a proposed model aims to evaluate features of website which are important in context of its deployment and its usability in mobile platform. (author)
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Domínguez Vila, Trinidad; Alén González, Elisa; Darcy, Simon
2017-08-09
To analyze the accessibility of official national tourism organization websites of countries around the world, in order to establish possible common patterns and rankings of those with exemplary practice through to those with the highest number of issues. The purpose for undertaking such an analysis is to provide a quasi-indicator of inclusive organizational practice for online accessibility for both destination managers and their accessible tourism consumers - domestic and overseas people with disability visiting the websites. The official tourism websites of 210 countries included in the latest World Tourism Organization report were analyzed. A website accessibility evaluation tool (website accessible test) was used in the analysis, according to AA and AAA levels of conformance to Web Content Accessibility Guidelines 2.0 requirements. Different patterns compliance to Web Content Accessibility Guidelines 2.0 were established for the clusters, which were rather similar for both AA and AAA conformance levels. The main issues in the least accessible websites were also identified, mainly focused on the following guidelines: navigable, compatible, adaptability, text alternatives and also referred to other assistive technologies. Once the main issues were established several alternatives are suggested to address them, such as implementing more prescriptive laws and regulations, complying with mandatory benchmark standards and/or having external agencies audit website designs. However, in addition to using benchmark standards, efforts to improve this situation should also be made by programmers, who should also rely on preexistent experiences and develop more dynamic knowledge. This knowledge may include text alternatives for any nontext content; creation of content that can be presented in different ways without losing information; provide ways to help users navigate, find content, determine where they are and navigate websites to maximize compatibility with assistive
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Fermi-Dirac correlation and Q-νKν(Q) distribution
International Nuclear Information System (INIS)
Dai Qirun; Li Jimei; Ma Zhanqing; Zhao Shusong
1996-01-01
The Fermi-Dirac correlation of identical protons is studied. Based on the non-perturbative theory of quantum fields, we put forward a kind of source distribution--the Q -ν K ν (Q) distribution. The Fermi-Dirac correlation of (p +- -p +- )-pairs is calculated from this distribution. The fitted curves agree with experimental data. The Q -ν K ν (Q) distribution has more advantages than the Gauss Source distribution. The radii of the source emitting hadrons and the anomalous dimensions of the Fermi field are calculated from the Fermi-Dirac correlation of identical protons
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Fermi states of Bose systems in three space dimensions
International Nuclear Information System (INIS)
Garbaczewski, P.
1985-01-01
Recently an exact spectral solution was constructed by Sudarshan and Tata for the (NTHETA) Fermi version of the Lee model. We demonstrate that it provides a partial solution for the related pure Bose spectral problems. Moreover, the (NTHETA) Bose (Bolsterli--Nelson) version of the Lee model is shown to possess Fermi partners, both exhibiting the partial solubility interplay: finding solutions in the Fermi case would presumably be easier than in the original Bose model. Fermi states of the underlying Bose systems in three space dimensions are explicitly identified
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Smith, Leann V.; Blake, Jamilia J.; Graves, Scott L.; Vaughan-Jensen, Jessica; Pulido, Ryne; Banks, Courtney
2016-01-01
The recruitment of culturally and linguistically diverse students to graduate programs is critical to the overall growth and development of school psychology as a field. Program websites serve as an effective recruitment tool for attracting prospective students, yet there is limited research on how school psychology programs use their websites to…
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Nonlinear Excitations in Strongly-Coupled Fermi-Dirac Plasmas
Akbari-Moghanjoughi, M.
2012-01-01
In this paper we use the conventional quantum hydrodynamics (QHD) model in combination with the Sagdeev pseudopotential method to explore the effects of Thomas-Fermi nonuniform electron distribution, Coulomb interactions, electron exchange and ion correlation on the large-amplitude nonlinear soliton dynamics in Fermi-Dirac plasmas. It is found that in the presence of strong interactions significant differences in nonlinear wave dynamics of Fermi-Dirac plasmas in the two distinct regimes of no...
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X.509 Authentication/Authorization in FermiCloud
Energy Technology Data Exchange (ETDEWEB)
Kim, Hyunwoo [Fermilab; Timm, Steven [Fermilab
2014-11-11
We present a summary of how X.509 authentication and authorization are used with OpenNebula in FermiCloud. We also describe a history of why the X.509 authentication was needed in FermiCloud, and review X.509 authorization options, both internal and external to OpenNebula. We show how these options can be and have been used to successfully run scientific workflows on federated clouds, which include OpenNebula on FermiCloud and Amazon Web Services as well as other community clouds. We also outline federation options being used by other commercial and open-source clouds and cloud research projects.
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Quantum mechanical models for the Fermi shuttle
Sternberg, James; Ovchinnikov, S. Yu.; Macek, J. H.
2009-05-01
Although the Fermi shuttle was originally proposed as an explanation for highly energetic cosmic rays, it is also a mechanism for the production of high energy electrons in atomic collisions [1]. The Fermi shuttle is usually thought of as a classical effect and most models of this process rely on classical or semi-classical approximations. In this work we explore several quantum mechanical models for ion-atom collisions and examine the evidence for the Fermi shuttle in these models. [4pt] [1] B. Sulik, Cs. Koncz, K. Tok'esi, A. Orb'an, and D. Ber'enyi, Phys Rev. Lett. 88 073201 (2002)
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Modelling of Graphene Nanoribbon Fermi Energy
International Nuclear Information System (INIS)
Johari, Z.; Ahmadi, M.T.; Chek, D.C.Y.; Amin, N.A.; Ismail, R.
2010-01-01
Graphene nano ribbon (GNR) is a promising alternative to carbon nano tube (CNT) to overcome the chirality challenge as a nano scale device channel. Due to the one-dimensional behavior of plane GNR, the carrier statistic study is attractive. Research works have been done on carrier statistic study of GNR especially in the parabolic part of the band structure using Boltzmann approximation (nondegenerate regime). Based on the quantum confinement effect, we have improved the fundamental study in degenerate regime for both the parabolic and non parabolic parts of GNR band energy. Our results demonstrate that the band energy of GNR near to the minimum band energy is parabolic. In this part of the band structure, the Fermi-Dirac integrals are sufficient for the carrier concentration study. The Fermi energy showed the temperature-dependent behavior similar to any other one-dimensional device in nondegenerate regime. However in the degenerate regime, the normalized Fermi energy with respect to the band edge is a function of carrier concentration. The numerical solution of Fermi-Dirac integrals for non parabolic region, which is away from the minimum energy band structure of GNR, is also presented.
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FermiGrid-experience and future plans
International Nuclear Information System (INIS)
Chadwick, K; Berman, E; Canal, P; Hesselroth, T; Garzoglio, G; Levshina, T; Sergeev, V; Sfiligoi, I; Sharma, N; Timm, S; Yocum, D R
2008-01-01
Fermilab supports a scientific program that includes experiments and scientists located across the globe. In order to better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The FermiGrid infrastructure allows the large experiments at Fermilab to have priority access to their own resources, enables sharing of these resources in an opportunistic fashion, and movement of work (jobs, data) between the Campus Grid and National Grids such as Open Science Grid (OSG) and the Worldwide LHC Computing Grid Collaboration (WLCG). FermiGrid resources support multiple Virtual Organizations (VOs), including VOs from the OSG, EGEE, and the WLCG. Fermilab also makes leading contributions to the Open Science Grid in the areas of accounting, batch computing, grid security, job management, resource selection, site infrastructure, storage management, and VO services. Through the FermiGrid interfaces, authenticated and authorized VOs and individuals may access our core grid services, the 10,000+ Fermilab resident CPUs, near-petabyte (including CMS) online disk pools and the multi-petabyte Fermilab Mass Storage System. These core grid services include a site wide Globus gatekeeper, VO management services for several VOs, Fermilab site authorization services, grid user mapping services, as well as job accounting and monitoring, resource selection and data movement services. Access to these services is via standard and well-supported grid interfaces. We will report on the user experience of using the FermiGrid campus infrastructure interfaced to a national cyberinfrastructure - the successes and the problems
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FermiGrid—experience and future plans
Chadwick, K.; Berman, E.; Canal, P.; Hesselroth, T.; Garzoglio, G.; Levshina, T.; Sergeev, V.; Sfiligoi, I.; Sharma, N.; Timm, S.; Yocum, D. R.
2008-07-01
Fermilab supports a scientific program that includes experiments and scientists located across the globe. In order to better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The FermiGrid infrastructure allows the large experiments at Fermilab to have priority access to their own resources, enables sharing of these resources in an opportunistic fashion, and movement of work (jobs, data) between the Campus Grid and National Grids such as Open Science Grid (OSG) and the Worldwide LHC Computing Grid Collaboration (WLCG). FermiGrid resources support multiple Virtual Organizations (VOs), including VOs from the OSG, EGEE, and the WLCG. Fermilab also makes leading contributions to the Open Science Grid in the areas of accounting, batch computing, grid security, job management, resource selection, site infrastructure, storage management, and VO services. Through the FermiGrid interfaces, authenticated and authorized VOs and individuals may access our core grid services, the 10,000+ Fermilab resident CPUs, near-petabyte (including CMS) online disk pools and the multi-petabyte Fermilab Mass Storage System. These core grid services include a site wide Globus gatekeeper, VO management services for several VOs, Fermilab site authorization services, grid user mapping services, as well as job accounting and monitoring, resource selection and data movement services. Access to these services is via standard and well-supported grid interfaces. We will report on the user experience of using the FermiGrid campus infrastructure interfaced to a national cyberinfrastructure - the successes and the problems.
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FermiGrid - experience and future plans
International Nuclear Information System (INIS)
Chadwick, K.; Berman, E.; Canal, P.; Hesselroth, T.; Garzoglio, G.; Levshina, T.; Sergeev, V.; Sfiligoi, I.; Timm, S.; Yocum, D.
2007-01-01
Fermilab supports a scientific program that includes experiments and scientists located across the globe. In order to better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The FermiGrid infrastructure allows the large experiments at Fermilab to have priority access to their own resources, enables sharing of these resources in an opportunistic fashion, and movement of work (jobs, data) between the Campus Grid and National Grids such as Open Science Grid and the WLCG. FermiGrid resources support multiple Virtual Organizations (VOs), including VOs from the Open Science Grid (OSG), EGEE and the Worldwide LHC Computing Grid Collaboration (WLCG). Fermilab also makes leading contributions to the Open Science Grid in the areas of accounting, batch computing, grid security, job management, resource selection, site infrastructure, storage management, and VO services. Through the FermiGrid interfaces, authenticated and authorized VOs and individuals may access our core grid services, the 10,000+ Fermilab resident CPUs, near-petabyte (including CMS) online disk pools and the multi-petabyte Fermilab Mass Storage System. These core grid services include a site wide Globus gatekeeper, VO management services for several VOs, Fermilab site authorization services, grid user mapping services, as well as job accounting and monitoring, resource selection and data movement services. Access to these services is via standard and well-supported grid interfaces. We will report on the user experience of using the FermiGrid campus infrastructure interfaced to a national cyberinfrastructure--the successes and the problems
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Fermi-Dirac statistics and the number theory
Kubasiak, A.; Korbicz, J.; Zakrzewski, J.; Lewenstein, M.
2005-01-01
We relate the Fermi-Dirac statistics of an ideal Fermi gas in a harmonic trap to partitions of given integers into distinct parts, studied in number theory. Using methods of quantum statistical physics we derive analytic expressions for cumulants of the probability distribution of the number of different partitions.
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Website Sharing in Online Health Communities: A Descriptive Analysis.
Nath, Chinmoy; Huh, Jina; Adupa, Abhishek Kalyan; Jonnalagadda, Siddhartha R
2016-01-13
An increasing number of people visit online health communities to seek health information. In these communities, people share experiences and information with others, often complemented with links to different websites. Understanding how people share websites can help us understand patients' needs in online health communities and improve how peer patients share health information online. Our goal was to understand (1) what kinds of websites are shared, (2) information quality of the shared websites, (3) who shares websites, (4) community differences in website-sharing behavior, and (5) the contexts in which patients share websites. We aimed to find practical applications and implications of website-sharing practices in online health communities. We used regular expressions to extract URLs from 10 WebMD online health communities. We then categorized the URLs based on their top-level domains. We counted the number of trust codes (eg, accredited agencies' formal evaluation and PubMed authors' institutions) for each website to assess information quality. We used descriptive statistics to determine website-sharing activities. To understand the context of the URL being discussed, we conducted a simple random selection of 5 threads that contained at least one post with URLs from each community. Gathering all other posts in these threads resulted in 387 posts for open coding analysis with the goal of understanding motivations and situations in which website sharing occurred. We extracted a total of 25,448 websites. The majority of the shared websites were .com (59.16%, 15,056/25,448) and WebMD internal (23.2%, 5905/25,448) websites; the least shared websites were social media websites (0.15%, 39/25,448). High-posting community members and moderators posted more websites with trust codes than low-posting community members did. The heart disease community had the highest percentage of websites containing trust codes compared to other communities. Members used websites to
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Five Steps to an Accessible Classroom Website
Amundson, Linda
2009-01-01
When teachers or technology coordinators publish a website, they are providing a product for a diverse group of people. That's why website design should follow accessibility guidelines. Websites should be accessible to those with visual, hearing, movement, cognitive, and speech disabilities. Good design means greater accessibility for all. This…
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Website Usability in Asia “From Within”
DEFF Research Database (Denmark)
Nawaz, Ather; Clemmensen, Torkil
2013-01-01
As the number of website users in Asia grows, there is an increasing need to gain an overview of human–computer interaction (HCI) research about users and websites in that context. This article presents an overview of HCI research on website usability in Asia “from within,” which outlines...... discusses the results and the need for a greater sensitivity to what is “local” and “from within” in HCI research and what this can add to the existing literature on website usability....
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SEO Techniques for Business Websites
Directory of Open Access Journals (Sweden)
2007-01-01
Full Text Available In the world of website marketing, search engines are an essential key to success. They are the most important way to bring traffic to websites. Understanding how search engines work and what they require is an important first step to harnessing their marketing power. There are proven methods to search engine marketing involving website design, content adaptation, and keyword strategy. The primary goal of these methods is to bring traffic to your site. The secondary goal is for that traffic to be targeted to your product. In the internet marketing game, exposure is essential. But marketing efficiency requires effective exposure to the right prospects.
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SEO Techniques for Business Websites
Directory of Open Access Journals (Sweden)
Alexandru ENACEANU
2010-09-01
Full Text Available In the world of website marketing, search engines are an essential key to success. They are the most important way to bring traffic to websites. Understanding how search engines work and what they require is an important first step to harnessing their marketing power. There are proven methods to search engine marketing involving website design, content adaptation, and keyword strategy. The primary goal of these methods is to bring traffic to your site. The secondary goal is for that traffic to be targeted to your product. In the internet marketing game, exposure is essential. But marketing efficiency requires effective exposure to the right prospects.
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The NASA Ames Life Sciences Data Archive: Biobanking for the Final Frontier
Rask, Jon; Chakravarty, Kaushik; French, Alison J.; Choi, Sungshin; Stewart, Helen J.
2017-01-01
The NASA Ames Institutional Scientific Collection involves the Ames Life Sciences Data Archive (ALSDA) and a biospecimen repository, which are responsible for archiving information and non-human biospecimens collected from spaceflight and matching ground control experiments. The ALSDA also manages a biospecimen sharing program, performs curation and long-term storage operations, and facilitates distribution of biospecimens for research purposes via a public website (https:lsda.jsc.nasa.gov). As part of our best practices, a tissue viability testing plan has been developed for the repository, which will assess the quality of samples subjected to long-term storage. We expect that the test results will confirm usability of the samples, enable broader science community interest, and verify operational efficiency of the archives. This work will also support NASA open science initiatives and guides development of NASA directives and policy for curation of biological collections.
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Robotic surgery claims on United States hospital websites.
Jin, Linda X; Ibrahim, Andrew M; Newman, Naeem A; Makarov, Danil V; Pronovost, Peter J; Makary, Martin A
2011-11-01
To examine the prevalence and content of robotic surgery information presented on websites of U.S. hospitals. We completed a systematic analysis of 400 randomly selected U.S. hospital websites in June of 2010. Data were collected on the presence and location of robotic surgery information on a hospital's website; use of images or text provided by the manufacturer; use of direct link to manufacturer website; statements of clinical superiority; statements of improved cancer outcome; mention of a comparison group for a statement; citation of supporting data and mention of specific risks. Forty-one percent of hospital websites described robotic surgery. Among these, 37% percent presented robotic surgery on their homepage, 73% used manufacturer-provided stock images or text, and 33% linked to a manufacturer website. Statements of clinical superiority were made on 86% of websites, with 32% describing improved cancer control, and 2% described a reference group. No hospital website mentioned risks. Materials provided by hospitals regarding the surgical robot overestimate benefits, largely ignore risks and are strongly influenced by the manufacturer. © 2011 National Association for Healthcare Quality.
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Faktor-Faktor yang Memengaruhi Kepuasan Pengguna Website Kampus
Directory of Open Access Journals (Sweden)
Enggal Sriwardiningsih
2013-05-01
Full Text Available The benefit of internet website is not maximall unless students are satisfied with the campus website. This study proposed and tested model explaining student satisfaction when the website is used as supplementary learning tool of face to face class method. The model is integrated determinants from Media Richness Theory, Self-Determination Theory, Knowledge Based Theory and Attribution Theory, and participant charateristics cited in the research literature. Following a demonstration and using website system in Binus University website system, data were collected from 210 college students. Structural Equation Modelling provided better support for a model that hypothesized stringer effect of website charateristics on e-service quality, motivation, and culture on using internet consumer satisfaction.
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Evaluation of otolaryngology residency program websites.
Svider, Peter F; Gupta, Amar; Johnson, Andrew P; Zuliani, Giancarlo; Shkoukani, Mahdi A; Eloy, Jean Anderson; Folbe, Adam J
2014-10-01
Prior to applying or interviewing, most prospective applicants turn to the Internet when evaluating residency programs, making maintenance of a comprehensive website critical. While certain "intangibles" such as reputation may not be communicated effectively online, residency websites are invaluable for conveying other aspects of a program. Prior analyses have reported that certain criteria such as research experience and didactics are important considerations for applicants. To evaluate the comprehensiveness of otolaryngology residency websites. Review of otolaryngology residency program websites. Websites of 99 civilian residency programs were searched for the presence of 23 criteria. Presence of 23 criteria for application process, incentives, instruction, research, clinical training, and other. Only 5 programs contained at least three-quarters of the criteria analyzed; on average programs reported less than 50% of information sought. Among the 99 residency program websites, a description of the following criteria was noted: comprehensive faculty listing (88%), didactics (80%), contact e-mail (77%), current residents (74%), description of facilities (70%), intern schedule (70%), research requirements (69%), otolaryngology rotation schedule (64%), other courses (61%), ERAS (Electronic Residency Application Service) link (55%), year-to-year responsibility progression (47%), call schedule (40%), active/past research projects (37%), area information (34%), message from the program director (33%) or chair (23%), selection criteria (30%), salary (directly on site) (23%), surgical statistics (18%), parking (9%), and meal allowance (7%). The mean (SD) percentage present of factors encompassing "clinical training" was 55% (23%), significantly higher than the mean (SD) percentage of factors covered under the "incentives" category (19% [11%]; P = .01). The proportion of overall criteria present on websites did not differ on organizing programs by region (range, 42
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Readability of websites containing information on dental implants.
Jayaratne, Yasas S N; Anderson, Nina K; Zwahlen, Roger A
2014-12-01
It is recommended that health-related materials for patients be written at sixth grade level or below. Many websites oriented toward patient education about dental implants are available, but the readability of these sites has not been evaluated. To assess readability of patient-oriented online information on dental implants. Websites containing patient-oriented information on dental implants were retrieved using the Google search engine. Individual and mean readability/grade levels were calculated using standardized formulas. Readability of each website was classified as easy (≤ 6th-grade level) or difficult (≥ 10th grade level). Thirty nine websites with patient-oriented information on dental implant were found. The average readability grade level of these websites was 11.65 ± 1.36. No website scored at/below the recommended 6th grade level. Thirty four of 39 websites (87.18%) were difficult to read. The number of characters, words, and sentences on these sites varied widely. All patient-oriented websites on dental implants scored above the recommended grade level, and majority of these sites were "difficult" in their readability. There is a dire need to create patient information websites on implants, which the majority can read. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.
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Gender Differences in Website Design: Implications for Education
Directory of Open Access Journals (Sweden)
Gloria Moss
2007-12-01
Full Text Available This study examines the implications of a gendered website production and preference aesthetic for the teaching of computer studies. Where the website production aesthetic is concerned, it finds evidence of statistically significant differences on 13 of the 23 factors against which sixty student websites were rated. These results were suggestive of a website aesthetic continuum with male and female production aesthetic tendencies at either end. The preference tests, conducted with 67 subjects, revealed preferences to be in tune with production aesthetics such that men had a statistically significant tendency to prefer home pages produced by men, and women those produced by women. This latter tendency was higher than the former. The finding of gendered differences in website production and preference aesthetics has important implications for teaching and assessment. Teachers selecting or assessing websites, whether commercial or produced by pupils and students, need to be mindful of the aesthetic employed in those websites. When selecting websites for educational purposes, a match should be made between the website and end-user preferences. Assessment of students' work should ideally be mindful of the potential for positive bias on the part of the assessor in the direction of work displaying their own favoured aesthetic.
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Ground-state pressure of an ideal Fermi gas
International Nuclear Information System (INIS)
Delsante, A.E.; Frankel, N.E.
1979-01-01
A simple relationship between the pressure, internal energy and Fermi energy of an ideal ultra-degenerate Fermi gas is derived in two ways. The conditions for its validity and its use in simplifying calculations are discussed
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Successful Statewide Walking Program Websites
Teran, Bianca Maria; Hongu, Nobuko
2012-01-01
Statewide Extension walking programs are making an effort to increase physical activity levels in America. An investigation of all 20 of these programs revealed that 14 use websites as marketing and educational tools, which could prove useful as the popularity of Internet communities continues to grow. Website usability information and an analysis…
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Quasiparticle lifetime in a mixture of Bose and Fermi superfluids.
Zheng, Wei; Zhai, Hui
2014-12-31
In this Letter, we study the effect of quasiparticle interactions in a Bose-Fermi superfluid mixture. We consider the lifetime of a quasiparticle of the Bose superfluid due to its interaction with quasiparticles in the Fermi superfluid. We find that this damping rate, i.e., the inverse of the lifetime, has quite a different threshold behavior at the BCS and the BEC side of the Fermi superfluid. The damping rate is a constant near the threshold momentum in the BCS side, while it increases rapidly in the BEC side. This is because, in the BCS side, the decay process is restricted by the constraint that the fermion quasiparticle is located near the Fermi surface, while such a restriction does not exist in the BEC side where the damping process is dominated by bosonic quasiparticles of the Fermi superfluid. Our results are related to the collective mode experiment in the recently realized Bose-Fermi superfluid mixture.
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Modeling high-energy gamma-rays from the Fermi Bubbles
Energy Technology Data Exchange (ETDEWEB)
Splettstoesser, Megan
2015-09-17
In 2010, the Fermi Bubbles were discovered at the galactic center of the Milky Way. These giant gamma-ray structures, extending 55° in galactic latitude and 20°-30° in galactic longitude, were not predicted. We wish to develop a model for the gamma-ray emission of the Fermi Bubbles. To do so, we assume that second order Fermi acceleration requires charged particles and irregular magnetic fields- both of which are present in the disk of the Milky Way galaxy. By solving the steady-state case of the transport equation, I compute the proton spectrum due to second order Fermi acceleration. I compare the analytical solutions of the proton spectrum to a numerical solution. I find that the numerical solution to the transport equation converges to the analytical solution in all cases. The gamma-ray spectrum due to proton-proton interaction is compared to Fermi Bubble data (from Ackermann et al. 2014), and I find that second order Fermi acceleration is a good fit for the gamma-ray spectrum of the Fermi Bubbles at low energies with an injection source term of S = 1.5 x 10⁻¹⁰ GeV⁻¹cm⁻³yr⁻¹. I find that a non-steady-state solution to the gamma-ray spectrum with an injection source term of S = 2 x 10⁻¹⁰ GeV⁻¹cm⁻³yr⁻¹ matches the bubble data at high energies.
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Thermodynamics of ultracold Fermi gases
International Nuclear Information System (INIS)
Nascimbene, Sylvain
2010-01-01
Complex Hamiltonians from condensed matter, such as the Fermi-Hubbard model, can be experimentally studied using ultracold gases. This thesis describes a new method for determining the equation of state of an ultracold gas, making the comparison with many-body theories straightforward. It is based on the measurement of the local pressure inside a trapped gas from the analysis of its in situ image. We first apply this method to the study of a Fermi gas with resonant interactions, a weakly-interacting 7 Li gas acting as a thermometer. Surprisingly, none of the existing many-body theories of the unitary gas accounts for the equation of state deduced from our study over its full range. The virial expansion extracted from the high-temperature data agrees with the resolution of the three-body problem. At low temperature, we observe, contrary to some previous studies, that the normal phase behaves as a Fermi liquid. Finally we obtain the critical temperature for superfluidity from a clear signature on the equation of state. We also measure the pressure of the ground state as a function of spin imbalance and interaction strength - measure directly relevant to describe the crust of neutron stars. Our data validate Monte-Carlo simulations and quantify the Lee-Huang-Yang corrections to mean-field interactions in low-density fermionic or bosonic superfluids. We show that, in most cases, the partially polarized normal phase can be described as a Fermi liquid of polarons. The polaron effective mass extracted from the equation of state is in agreement with a study of collective modes. (author)
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Dark lump excitations in superfluid Fermi gases
Xu, Yan-Xia; Duan, Wen-Shan
2012-11-01
We study the linear and nonlinear properties of two-dimensional matter-wave pulses in disk-shaped superfluid Fermi gases. A Kadomtsev—Petviashvili I (KPI) solitary wave has been realized for superfluid Fermi gases in the limited cases of Bardeen—Cooper—Schrieffer (BCS) regime, Bose—Einstein condensate (BEC) regime, and unitarity regime. One-lump solution as well as one-line soliton solutions for the KPI equation are obtained, and two-line soliton solutions with the same amplitude are also studied in the limited cases. The dependence of the lump propagating velocity and the sound speed of two-dimensional superfluid Fermi gases on the interaction parameter are investigated for the limited cases of BEC and unitarity.
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Dark lump excitations in superfluid Fermi gases
International Nuclear Information System (INIS)
Xu Yan-Xia; Duan Wen-Shan
2012-01-01
We study the linear and nonlinear properties of two-dimensional matter-wave pulses in disk-shaped superfluid Fermi gases. A Kadomtsev—Petviashvili I (KPI) solitary wave has been realized for superfluid Fermi gases in the limited cases of Bardeen—Cooper—Schrieffer (BCS) regime, Bose—Einstein condensate (BEC) regime, and unitarity regime. One-lump solution as well as one-line soliton solutions for the KPI equation are obtained, and two-line soliton solutions with the same amplitude are also studied in the limited cases. The dependence of the lump propagating velocity and the sound speed of two-dimensional superfluid Fermi gases on the interaction parameter are investigated for the limited cases of BEC and unitarity
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The Top Ten Websites in Critical Care Medicine Education Today.
Wolbrink, Traci A; Rubin, Lucy; Burns, Jeffrey P; Markovitz, Barry
2018-01-01
The number of websites for the critical care provider is rapidly growing, including websites that are part of the Free Open Access Med(ical ed)ucation (FOAM) movement. With this rapidly expanding number of websites, critical appraisal is needed to identify quality websites. The last major review of critical care websites was published in 2011, and thus a new review of the websites relevant to the critical care clinician is necessary. A new assessment tool for evaluating critical care medicine education websites, the Critical Care Medical Education Website Quality Evaluation Tool (CCMEWQET), was modified from existing tools. A PubMed and Startpage search from 2007 to 2017 was conducted to identify websites relevant to critical care medicine education. These websites were scored based on the CCMEWQET. Ninety-seven websites relevant for critical care medicine education were identified and scored, and the top ten websites were described in detail. Common types of resources available on these websites included blog posts, podcasts, videos, online journal clubs, and interactive components such as quizzes. Almost one quarter of websites (n = 22) classified themselves as FOAM websites. The top ten websites most often included an editorial process, high-quality and appropriately attributed graphics and multimedia, scored much higher for comprehensiveness and ease of access, and included opportunities for interactive learning. Many excellent online resources for critical care medicine education currently exist, and the number is likely to continue to increase. Opportunities for improvement in many websites include more active engagement of learners, upgrading navigation abilities, incorporating an editorial process, and providing appropriate attribution for graphics and media.
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Quasiparticles and Fermi liquid behaviour in an organic metal
Kiss, T.; Chainani, A.; Yamamoto, H.M.; Miyazaki, T.; Akimoto, T.; Shimojima, T.; Ishizaka, K.; Watanabe, S.; Chen, C.-T.; Fukaya, A.; Kato, R.; Shin, S.
2012-01-01
Many organic metals display exotic properties such as superconductivity, spin-charge separation and so on and have been described as quasi-one-dimensional Luttinger liquids. However, a genuine Fermi liquid behaviour with quasiparticles and Fermi surfaces have not been reported to date for any organic metal. Here, we report the experimental Fermi surface and band structure of an organic metal (BEDT-TTF)3Br(pBIB) obtained using angle-resolved photoelectron spectroscopy, and show its consistency with first-principles band structure calculations. Our results reveal a quasiparticle renormalization at low energy scales (effective mass m*=1.9 me) and ω2 dependence of the imaginary part of the self energy, limited by a kink at ~50 meV arising from coupling to molecular vibrations. The study unambiguously proves that (BEDT-TTF)3Br(pBIB) is a quasi-2D organic Fermi liquid with a Fermi surface consistent with Shubnikov-de Haas results. PMID:23011143
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NASA Life Sciences Data Repositories: Tools for Retrospective Analysis and Future Planning
Thomas, D.; Wear, M.; VanBaalen, M.; Lee, L.; Fitts, M.
2011-01-01
As NASA transitions from the Space Shuttle era into the next phase of space exploration, the need to ensure the capture, analysis, and application of its research and medical data is of greater urgency than at any other previous time. In this era of limited resources and challenging schedules, the Human Research Program (HRP) based at NASA s Johnson Space Center (JSC) recognizes the need to extract the greatest possible amount of information from the data already captured, as well as focus current and future research funding on addressing the HRP goal to provide human health and performance countermeasures, knowledge, technologies, and tools to enable safe, reliable, and productive human space exploration. To this end, the Science Management Office and the Medical Informatics and Health Care Systems Branch within the HRP and the Space Medicine Division have been working to make both research data and clinical data more accessible to the user community. The Life Sciences Data Archive (LSDA), the research repository housing data and information regarding the physiologic effects of microgravity, and the Lifetime Surveillance of Astronaut Health (LSAH-R), the clinical repository housing astronaut data, have joined forces to achieve this goal. The task of both repositories is to acquire, preserve, and distribute data and information both within the NASA community and to the science community at large. This is accomplished via the LSDA s public website (http://lsda.jsc.nasa.gov), which allows access to experiment descriptions including hardware, datasets, key personnel, mission descriptions and a mechanism for researchers to request additional data, research and clinical, that is not accessible from the public website. This will result in making the work of NASA and its partners available to the wider sciences community, both domestic and international. The desired outcome is the use of these data for knowledge discovery, retrospective analysis, and planning of future
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[Content analysis of websites directed to low back pain].
Gülcü, Nebahat; Bulut, Sefa
2010-04-01
In this study, we aimed to evaluate the websites directed at providing information about low back pain with respect to their content and quality. The websites were detected by scanning the words 'low back pain' from the Turkish pages module of the Google search portal. One hundred and fifty websites introduced on the first 20 pages were evaluated; the 65 websites determined to fulfill the desired criteria were analyzed in detail. Twenty of the 65 websites were excluded due to low quality, extraction from another website, sales promotion-related books/products, or qualified as news. In the majority of websites, no site administrator was indicated. When an administrator was indicated, the common specialities were physical therapists (13%), neurosurgeons (8%) and anesthesiologists (4%). Ten of the websites (22%) provided a pain definition close to international standards, whereas pain classification was available on most of the websites (84%). There was no mention of methods of pain scoring on any of them. Treatment modalities for which information was given included mostly behavioral, physical and pharmacological therapies, respectively. Complementary techniques, in order, included acupuncture, yoga and bioenergy. On 10 websites, text was supported with medical photographs, and videos were available on two. None of the websites had a provision for selection of other languages. Websites directed to low back pain should be enriched with respect to scientific content, thereby serving to increase the level of social education related to pain management.
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Kannan, Rathimala; Govindan, Marthandan
2011-01-01
Hyperlinks, which connect web pages on the World Wide Web, are rich sources of hidden information. E- Commerce Websites, which are created for different purposes from online sales to company promotion, would benefit if they receive more links from other websites as this would lead to increase the traffic to these websites. This paper analyses the structure of e-commerce websites using webometric approach to uncover any hidden information from the hyperlinks. The top 50 retail companies' e-com...
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REVIEW KONSEP RESPONSIVE DESIGN DENGAN FRAMEWORK MATERIALIZE PADA WEBSITE
Directory of Open Access Journals (Sweden)
Cindy Novianty
2017-09-01
Full Text Available Responsive web design merupakan sebuah desain website yang dapat menyesuaikan tiap ukuran pada tiap device. Berdasarkan hasil dari beberapa responden menyatakan 62% responden setuju jika beberapa website yang belum mampu menyesuaikan ukuran tampilan web, 54% responden setuju bahwa desain yang responsive mempengaruhi faktor kenyamanan responden, 60% responden setuju bahwa konten utama dan fungsionalitas dari website yang sulit diakses melalui perangkat mobile, 56% responden setuju bahwa tampilan website yang kurang responsive berpengaruh buruk terhadap faktor kenyamanan responden, 52% responden setuju bahwa website yang belum mampu menyesuaikan ukuran pada tiap perangkat mobile. Dari hasil review tersebut dapat disimpulkan bahwa website yang tidak responsive mempengaruhi ketidak nyamanan para pengguna untuk mengakses informasi melalui website online.
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Entertaining Whilst Defacing Websites: Psychological Games for Hackers
Directory of Open Access Journals (Sweden)
Ashish K Das
2017-08-01
Full Text Available Aim/Purpose: This study aims to investigate various characteristics from both victims as defaced websites and defacers that linked to a risk of being defaced through a set of descriptive analysis. Background: The current figures from a spectrum of sources, both academic and non-academic reports, proved a progressive increase of website defacement attacks to numerous organisations. Methodology: This study obtains a set of data from Zone-H site, which is accessible to the public, including 99,437 defaced websites. The descriptive analysis is applied in order to understand the motives of defacers and the probability of website re-defacements through the statistical investigation. Findings: The motives for defacing websites are driven mainly due to entertaining reasons. This in turn has an implication on the type of techniques defacers attack websites.
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Thomas Fermi model of finite nuclei
International Nuclear Information System (INIS)
Boguta, J.; Rafelski, J.
1977-01-01
A relativistic Thomas-Fermi model of finite-nuclei is considered. The effective nuclear interaction is mediated by exchanges of isoscalar scalar and vector mesons. The authors include also a self-interaction of the scalar meson field and the Coulomb repulsion of the protons. The parameters of the model are constrained by the average nuclear properties. The Thomas-Fermi equations are solved numerically for finite, stable nuclei. The particular case of 208 82 Pb is considered in more detail. (Auth.)
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The radio-γ-ray connection in Fermi blazars
Ghirlanda, G.; Ghisellini, G.; Tavecchio, F.; Foschini, L.; Bonnoli, G.
2011-05-01
We study the correlation between the γ-ray flux (Fγ), averaged over the first 11 months of the Fermi survey and integrated above 100 MeV, and the radio flux density (Fr at 20 GHz) of Fermi sources associated with a radio counterpart in the 20-GHz Australia Telescope Compact Array (AT20G) survey. Considering the blazars detected in both bands, the correlation is highly significant and has the form Fγ∝F0.85±0.04r, similar to BL Lacertae objects and flat-spectrum radio quasars. However, only a small fraction (˜1/15) of the AT20G radio sources with flat radio spectra are detected by Fermi. To understand if this correlation is real, we examine the selection effects introduced by the flux limits of both the radio and the γ-ray surveys, and the importance of variability of the γ-ray flux. After accounting for these effects, we find that the radio-γ-ray flux correlation is real, but its slope is steeper than the observed one, that is, Fγ∝Fδr with δ in the range 1.25-1.5. The observed Fγ-Fr correlation and the fraction of radio sources detected by Fermi are reproduced assuming a long-term γ-ray flux variability, following a lognormal probability distribution with standard deviation σ≥ 0.5 (corresponding to Fγ varying by at least a factor of 3). Such a variability is compatible, even if not necessarily equal, with what is observed when comparing, for the sources in common, the EGRET and the Fermi γ-ray fluxes (even if the Fermi fluxes are averaged over ˜1 yr). Another indication of variability is the non-detection of 12 out of 66 EGRET blazars by Fermi, despite its higher sensitivity. We also study the strong linear correlation between the γ-ray and the radio luminosity of the 144 AT20G-Fermi associations with known redshift and show, through partial correlation analysis, that it is statistically robust. Two possible implications of these correlations are discussed: the contribution of blazars to the extragalactic γ-ray background and the prediction
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"Where is Everybody?" An Account of Fermi's Question
Jones, E. M.
1985-03-01
Enrico Fermi's famous question, now central to debates about the prevalence of extraterrestrial civilizations, arose during a luncheon conversation with Emil Konopinski, Edward Teller, and Herbert York in the summer of 1950. Fermi's companions on that day have provided accounts of the incident.
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Vortex Lattices in the Bose-Fermi Superfluid Mixture.
Jiang, Yuzhu; Qi, Ran; Shi, Zhe-Yu; Zhai, Hui
2017-02-24
In this Letter we show that the vortex lattice structure in the Bose-Fermi superfluid mixture can undergo a sequence of structure transitions when the Fermi superfluid is tuned from the BCS regime to the BEC regime. This is due to the difference in the vortex core structure of a Fermi superfluid in the BCS regime and in the BEC regime. In the BCS regime the vortex core is nearly filled, while the density at the vortex core gradually decreases until it empties out in the BEC regime. Therefore, with the density-density interaction between the Bose and the Fermi superfluids, interaction between the two sets of vortex lattices gets stronger in the BEC regime, which yields the structure transition of vortex lattices. In view of the recent realization of this superfluid mixture and vortices therein, our theoretical predication can be verified experimentally in the near future.
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Fermi surface of underdoped high-Tc superconducting cuprates
International Nuclear Information System (INIS)
Dai, X.; Su, Z.; Yu, L.
1997-01-01
The coexistence of a π-flux state and a d-wave resonant-valance-bond (RVB) state is considered in this paper within the slave-boson approach. A critical value of doping concentration δ c is found, below which the coexisting π-flux and d-wave RVB state is favored in energy. The pseudo-Fermi surface of spinons and the physical electron spectral function are calculated. A clear Fermi-level crossing is found along the (0,0) to (π, π) direction, but no such crossing is detected along the (π, 0) to (π, π) direction. Also, an energy gap of d-wave symmetry appears at the Fermi level in our calculation. The above results are in agreement with the angle-resolved photoemission experiments which indicate at a d-wave pseudogap and a half-pocket-like Fermi surface in underdoped cuprates. copyright 1997 The American Physical Society
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High and low spatial frequencies in website evaluations.
Thielsch, Meinald T; Hirschfeld, Gerrit
2010-08-01
Which features of websites are important for users' perceptions regarding aesthetics or usability? This study investigates how evaluations of aesthetic appeal and usability depend on high vs. low spatial frequencies. High spatial frequencies convey information on fine details, whereas low spatial frequencies convey information about the global layout. Participants rated aesthetic appeal and usability of 50 website screenshots from different domains. Screenshots were presented unfiltered, low-pass filtered with blurred targets or high-pass filtered with high-pass filtered targets. The main result is that low spatial frequencies can be seen to have a unique contribution in perceived website aesthetics, thus confirming a central prediction from processing fluency theory. There was no connection between low spatial frequencies and usability evaluations, whereas strong correlations were found between ratings of high-pass filtered websites and those of unfiltered websites in aesthetics and usability. This study thus offers a new perspective on the biological basis of users' website perceptions. This research links ergonomics to neurocognitive models of visual processing. This paper investigates how high and low spatial frequencies, which are neurologically processed in different visual pathways, independently contribute to users' perceptions of websites. This is very relevant for theories of website perceptions and for practitioners of web design.
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Vacuum alignment and radiatively induced Fermi scale
Directory of Open Access Journals (Sweden)
Alanne Tommi
2017-01-01
Full Text Available We extend the discussion about vacuum misalignment by quantum corrections in models with composite pseudo-Goldstone Higgs boson to renormalisable models with elementary scalars. As a concrete example, we propose a framework, where the hierarchy between the unification and the Fermi scale emerges radiatively. This scenario provides an interesting link between the unification and Fermi scale physics.
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3D Quantum Hall Effect of Fermi Arc in Topological Semimetals
Wang, C. M.; Sun, Hai-Peng; Lu, Hai-Zhou; Xie, X. C.
2017-09-01
The quantum Hall effect is usually observed in 2D systems. We show that the Fermi arcs can give rise to a distinctive 3D quantum Hall effect in topological semimetals. Because of the topological constraint, the Fermi arc at a single surface has an open Fermi surface, which cannot host the quantum Hall effect. Via a "wormhole" tunneling assisted by the Weyl nodes, the Fermi arcs at opposite surfaces can form a complete Fermi loop and support the quantum Hall effect. The edge states of the Fermi arcs show a unique 3D distribution, giving an example of (d -2 )-dimensional boundary states. This is distinctly different from the surface-state quantum Hall effect from a single surface of topological insulator. As the Fermi energy sweeps through the Weyl nodes, the sheet Hall conductivity evolves from the 1 /B dependence to quantized plateaus at the Weyl nodes. This behavior can be realized by tuning gate voltages in a slab of topological semimetal, such as the TaAs family, Cd3 As2 , or Na3Bi . This work will be instructive not only for searching transport signatures of the Fermi arcs but also for exploring novel electron gases in other topological phases of matter.
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Dental practice websites: creating a Web presence.
Miller, Syrene A; Forrest, Jane L
2002-07-01
Web technology provides an opportunity for dentists to showcase their practice philosophy, quality of care, office setting, and staff in a creative manner. Having a Website provides a practice with innovative and cost-effective communications and marketing tools for current and potential patients who use the Internet. The main benefits of using a Website to promote one's practice are: Making office time more productive, tasks more timely, follow-up less necessary Engaging patients in an interactive and visual learning process Providing online forms and procedure examples for patients Projecting a competent and current image Tracking the usage of Web pages. Several options are available when considering the development of a Website. These options range in cost based on customization of the site and ongoing support services, such as site updates, technical assistance, and Web usage statistics. In most cases, Websites are less expensive than advertising in the phone book. Options in creating a Website include building one's own, employing a company that offers Website templates, and employing a company that offers customized sites. These development options and benefits will continue to grow as individuals access the Web and more information and sites become available.
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Gender Differences in Website Design: Implications for Education
Gloria Moss; Rod W Gunn
2007-01-01
This study examines the implications of a gendered website production and preference aesthetic for the teaching of computer studies. Where the website production aesthetic is concerned, it finds evidence of statistically significant differences on 13 of the 23 factors against which sixty student websites were rated. These results were suggestive of a website aesthetic continuum with male and female production aesthetic tendencies at either end. The preference tests, conducted with 67 subjects...
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Quantum nonlocal theory of topological Fermi arc plasmons in Weyl semimetals
Andolina, Gian Marcello; Pellegrino, Francesco M. D.; Koppens, Frank H. L.; Polini, Marco
2018-03-01
The surface of a Weyl semimetal (WSM) displays Fermi arcs, i.e., disjoint segments of a two-dimensional Fermi contour. We present a quantum-mechanical nonlocal theory of chiral Fermi arc plasmons in WSMs with broken time-reversal symmetry. These are collective excitations constructed from topological Fermi arc and bulk electron states and arising from electron-electron interactions, which are treated in the realm of the random phase approximation. Our theory includes quantum effects associated with the penetration of the Fermi arc surface states into the bulk and dissipation, which is intrinsically nonlocal in nature and arises from decay processes mainly involving bulk electron-hole pair excitations.
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Fermi liquid and non-Fermi liquid in M-channel N fold degenerate anderson lattice
International Nuclear Information System (INIS)
Tsuruta, Atsushi; Ono, Yoshiaki; Matsuura, Tamifusa; Kuroda, Yoshihiro; Kobayashi, Akito; Deguchi, Ken
1999-01-01
We investigate Fermi liquid in the single-channel U-infinite N fold degenerate Anderson lattice with use of the expansion from the large limit of the spin-orbital degeneracy N. By collecting all diagrams up to O(N -2 ) of the imaginary part of the self-energy of the conduction electrons, the sum of those is shown to be given by a form proportional to ω 2 + π 2 T 2 up to O(N -2 ) in the single-channel model. On the other hand, the imaginary part of the self-energy of O(N -1 ) in the multichannel model has more singular frequency-/temperature-dependence, so the system is regarded as non-Fermi liquid. (author)
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Fermi Timing and Synchronization System
International Nuclear Information System (INIS)
Wilcox, R.; Staples, J.; Doolittle, L.; Byrd, J.; Ratti, A.; Kaertner, F.X.; Kim, J.; Chen, J.; Ilday, F.O.; Ludwig, F.; Winter, A.; Ferianis, M.; Danailov, M.; D'Auria, G.
2006-01-01
The Fermi FEL will depend critically on precise timing of its RF, laser and diagnostic subsystems. The timing subsystem to coordinate these functions will need to reliably maintain sub-100fs synchronicity between distant points up to 300m apart in the Fermi facility. The technology to do this is not commercially available, and has not been experimentally demonstrated in a working facility. Therefore, new technology must be developed to meet these needs. Two approaches have been researched by different groups working with the Fermi staff. At MIT, a pulse transmission scheme has been developed for synchronization of RF and laser devices. And at LBL, a CW transmission scheme has been developed for RF and laser synchronization. These respective schemes have advantages and disadvantages that will become better understood in coming years. This document presents the work done by both teams, and suggests a possible system design which integrates them both. The integrated system design provides an example of how choices can be made between the different approaches without significantly changing the basic infrastructure of the system. Overall system issues common to any synchronization scheme are also discussed
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Fermi Timing and Synchronization System
Energy Technology Data Exchange (ETDEWEB)
Wilcox, R.; Staples, J.; Doolittle, L.; Byrd, J.; Ratti, A.; Kaertner, F.X.; Kim, J.; Chen, J.; Ilday, F.O.; Ludwig, F.; Winter, A.; Ferianis, M.; Danailov, M.; D' Auria, G.
2006-07-19
The Fermi FEL will depend critically on precise timing of its RF, laser and diagnostic subsystems. The timing subsystem to coordinate these functions will need to reliably maintain sub-100fs synchronicity between distant points up to 300m apart in the Fermi facility. The technology to do this is not commercially available, and has not been experimentally demonstrated in a working facility. Therefore, new technology must be developed to meet these needs. Two approaches have been researched by different groups working with the Fermi staff. At MIT, a pulse transmission scheme has been developed for synchronization of RF and laser devices. And at LBL, a CW transmission scheme has been developed for RF and laser synchronization. These respective schemes have advantages and disadvantages that will become better understood in coming years. This document presents the work done by both teams, and suggests a possible system design which integrates them both. The integrated system design provides an example of how choices can be made between the different approaches without significantly changing the basic infrastructure of the system. Overall system issues common to any synchronization scheme are also discussed.
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Discrete nature of thermodynamics in confined ideal Fermi gases
International Nuclear Information System (INIS)
Aydin, Alhun; Sisman, Altug
2014-01-01
Intrinsic discrete nature in thermodynamic properties of Fermi gases appears under strongly confined and degenerate conditions. For a rectangular confinement domain, thermodynamic properties of an ideal Fermi gas are expressed in their exact summation forms. For 1D, 2D and 3D nano domains, variations of both number of particles and internal energy per particle with chemical potential are examined. It is shown that their relation with chemical potential exhibits a discrete nature which allows them to take only some definite values. Furthermore, quasi-irregular oscillatory-like sharp peaks are observed in heat capacity. New nano devices can be developed based on these behaviors. - Highlights: • “Discrete behaviors” appear in thermodynamic properties of ideal Fermi gases at nano scale. • Variations of particle number and internal energy with chemical potential have stepwise behavior. • There are oscillations and peaks in the variation of heat capacity with domain size and particle number. • Fermi line and Fermi surface at nano scale are not continuous but “discrete”. • Heat capacity oscillations can be used for excess thermal energy storage at nano scale
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Evaluation of Spam Impact on Arabic Websites Popularity
Directory of Open Access Journals (Sweden)
Mohammed N. Al-Kabi
2015-04-01
Full Text Available The expansion of the Web and its information in all aspects of life raises the concern of how to trust information published on the Web especially in cases where publisher may not be known. Websites strive to be more popular and make themselves visible to search engines and eventually to users. Website popularity can be measured using several metrics such as the Web traffic (e.g. Website: visitors’ number and visited page number. A link or page popularity refers to the total number of hyperlinks referring to a certain Web page. In this study, several top ranked Arabic Websites are selected for evaluating possible Web spam behavior. Websites use spam techniques to boost their ranks within Search Engine Results Page (SERP. Results of this study showed that some of these popular Websites are using techniques that are considered spam techniques according to Search Engine Optimization guidelines.
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Energy Technology Data Exchange (ETDEWEB)
Martin, R
1977-07-01
The Thomas-Fermi statistical model, from the N-body point of view is used in order to have systematic corrections to the T-Fermis equation. Approximate calculus methods are found from analytic study of the T-Fermis equation for non zero temperature. T-Fermis equation is solved with the code GOLEM written in FORTRAN V (UNIVAC). It also provides the thermodynamical quantities and a new method to calculate several isothermal tables. (Author) 24 refs.
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Perception Analysis of Desktop and Mobile Service Website
Directory of Open Access Journals (Sweden)
Rizqiyatul Khoiriyah
2016-12-01
Full Text Available The research was conducted as a qualitative study of the website to deeper explore and examine the analysis of user perception of desktop and mobile website services. This research reviewed about user perception of desktop and mobile service website used by using qualitative methods adapted to WebQual and User Experience approach. This qualitative research refered to the theoretical reference written by Creswell (2014. The expected outcome is to know the user perceptions of the available services and information in the website along with the possibility of desktop and mobile gap arising from differences in the two services. These results can be used as a service model on the website of the user experience.
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National Aeronautics and Space Administration — Fermi is a powerful space observatory that will open a wide window on the universe. Gamma rays are the highest-energy form of light, and the gamma-ray sky is...
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Experience with a Spanish-language laparoscopy website.
Moreno-Sanz, Carlos; Seoane-González, Jose B
2006-02-01
Although there are no clearly defined electronic tools for continuing medical education (CME), new information technologies offer a basic platform for presenting training content on the internet. Due to the shortage of websites about minimally invasive surgery in the Spanish language, we set up a topical website in Spanish. This study considers the experience with the website between April 2001 and January 2005. To study the activity of the website, the registry information was analyzed descriptively using the log files of the server. To study the characteristics of the users, we searched the database of registered users. We found a total of 107,941 visits to our website and a total of 624,895 page downloads. Most visits to the site were made from Spanish-speaking countries. The most frequent professional profile of the registered users was that of general surgeon. The development, implementation, and evaluation of Spanish-language CME initiatives over the internet is promising but presents challenges.
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The relationship between website sport consumption motives and ...
African Journals Online (AJOL)
Knowledge and skill in addressing website consumption motives are essential aspects in contemporary sport marketing. There is growing body of literature on website consumption motives in sport. However, there is a dearth of research on the relationship between website consumption motives and future behavioural ...
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Itinerant Ferromagnetism in Ultracold Fermi Gases
DEFF Research Database (Denmark)
Heiselberg, Henning
2012-01-01
Itinerant ferromagnetism in cold Fermi gases with repulsive interactions is studied applying the Jastrow-Slater approximation generalized to finite polarization and temperature. For two components at zero temperature a second order transition is found at akF ≃ 0.90 compatible with QMC. Thermodyna......Itinerant ferromagnetism in cold Fermi gases with repulsive interactions is studied applying the Jastrow-Slater approximation generalized to finite polarization and temperature. For two components at zero temperature a second order transition is found at akF ≃ 0.90 compatible with QMC...
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An Intelligent Framework for Website Usability
Directory of Open Access Journals (Sweden)
Alexiei Dingli
2014-01-01
Full Text Available With the major advances of the Internet throughout the past couple of years, websites have come to play a central role in the modern marketing business program. However, simply owning a website is not enough for a business to prosper on the Web. Indeed, it is the level of usability of a website that determines if a user stays or abandons it for another competing one. It is therefore crucial to understand the importance of usability on the web, and consequently the need for its evaluation. Nonetheless, there exist a number of obstacles preventing software organizations from successfully applying sound website usability evaluation strategies in practice. From this point of view automation of the latter is extremely beneficial, which not only assists designers in creating more usable websites, but also enhances the Internet users’ experience on the Web and increases their level of satisfaction. As a means of addressing this problem, an Intelligent Usability Evaluation (IUE tool is proposed that automates the usability evaluation process by employing a Heuristic Evaluation technique in an intelligent manner through the adoption of several research-based AI methods. Experimental results show there exists a high correlation between the tool and human annotators when identifying the considered usability violations.
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A model for website analysis and\tconception: the Website Canvas Model applied to\tEldiario.es
Directory of Open Access Journals (Sweden)
Carles Sanabre Vives
2015-11-01
Full Text Available This article presents the model of ideation and analysis called Website CanvasModel. It allows identifying the key aspects for a website to be successful, and shows how ithas been applied to Eldiario.es. As a result, the key factors prompting the success of thisdigital newspaper have been identified.
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Emergency Contraception Website
Text Only Full media Version Get Emergency Contraception NOW INFO about Emergency Contraception Q&A about Emergency Contraception Español | Arabic Find a Morning After Pill Provider Near You This website ...
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Optimal strategy for selling on group-buying website
Directory of Open Access Journals (Sweden)
Xuan Jiang
2014-09-01
Full Text Available Purpose: The purpose of this paper is to help business marketers with offline channels to make decisions on whether to sell through Group-buying (GB websites and how to set online price with the coordination of maximum deal size on GB websites. Design/methodology/approach: Considering the deal structure of GB websites especially for the service fee and minimum deal size limit required by GB websites, advertising effect of selling on GB websites, and interaction between online and offline markets, an analytical model is built to derive optimal online price and maximum deal size for sellers selling through GB website. This paper aims to answer four research questions: (1 How to make a decision on maximum deal size with coordination of the deal price? (2 Will selling on GB websites always be better than staying with offline channel only? (3 What kind of products is more appropriate to sell on GB website? (4How could GB website operator induce sellers to offer deep discount in GB deals? Findings and Originality/value: This paper obtains optimal strategies for sellers selling on GB website and finds that: Even if a seller has sufficient capacity, he/she may still set a maximum deal size on the GB deal to take advantage of Advertisement with Limited Availability (ALA effect; Selling through GB website may not bring a higher profit than selling only through offline channel when a GB site only has a small consumer base and/or if there is a big overlap between the online and offline markets; Low margin products are more suitable for being sold online with ALA strategies (LP-ALA or HP-ALA than high margin ones; A GB site operator could set a small minimum deal size to induce deep discounts from the sellers selling through GB deals. Research limitations/implications: The present study assumed that the demand function is determinate and linear. It will be interesting to study how stochastic demand and a more general demand function affect the optimal
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Praksisorienteret forskningsformidling via et offentligt website
DEFF Research Database (Denmark)
Kirkeskov, Jesper
I dialog med brugerne gennemføres en videreudvikling af By og Bygs website, www.by-og-byg.dk, som primært henvender sig til professionelle praktikere der beskæftiger sig med byggeriet og det byggede miljø. Ex ante antages det at såvel navigationsstruktur som søgefaciliteter skal rekonstrueres...... lignende informationstunge websites med fordel vil kunne hente inspiration i den udviklede løsning. Afhandlingen beskriver endvidere en komplet rekonstruktion af By og Bygs website, inkl. en ny navigationsstruktur som imødekommer brugernes behov for en emnebaseret indgang til websitets indhold. Ved den...... forskningsrapporter i traditionel, lineær form. Ex post synes det således fortsat at være en stor udfordring at hypermediere forskningsresultater med henblik på anvendelsesorientering. Afhandlingen ledsages af en betaversion af By og Bygs ny website, som blev idriftsat april 2004 på adressen www.by-og-byg.dk ....
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CERN. Geneva
2017-01-01
When you finish your website (or a web app) and you are ready to show it to the world, it's not the end of your work, it's just the beginning. Users will ask you to add new features, some bugs will be discovered or you will simply have to answer some emails about the website. But before this happens, you need to put is somewhere, so people can see it and start using it. Now, how do you select which of the 1047 different hosting companies will be the best? Or where do you get a cheap domain? How do you know that your website is up and running when you don't look or how do you communicate with people who subscribed to your newsletter? You don't know? Don't worry, during this talk I will give you some examples of tools and services that you can use when launching your website (with an emphasis on cheap/free and reliable tools).
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JSC Orbital Debris Website Description
Johnson, Nicholas L.
2006-01-01
Purpose: The website provides information about the NASA Orbital Debris Program Office at JSC, which is the lead NASA center for orbital debris research. It is recognized world-wide for its leadership in addressing orbital debris issues. The NASA Orbital Debris Program Office has taken the international lead in conducting measurements of the environment and in developing the technical consensus for adopting mitigation measures to protect users of the orbital environment. Work at the center continues with developing an improved understanding of the orbital debris environment and measures that can be taken to control its growth. Major Contents: Orbital Debris research is divided into the following five broad efforts. Each area of research contains specific information as follows: 1) Modeling - NASA scientists continue to develop and upgrade orbital debris models to describe and characterize the current and future debris environment. Evolutionary and engineering models are described in detail. Downloadable items include a document in PDF format and executable software. 2) Measurements - Measurements of near-Earth orbital debris are accomplished by conducting ground-based and space-based observations of the orbital debris environment. The data from these sources provide validation of the environment models and identify the presence of new sources. Radar, optical and surface examinations are described. External links to related topics are provided. 3) Protection - Orbital debris protection involves conducting hypervelocity impact measurements to assess the risk presented by orbital debris to operating spacecraft and developing new materials and new designs to provide better protection from the environment with less weight penalty. The data from this work provides the link between the environment defined by the models and the risk presented by that environment to operating spacecraft and provides recommendations on design and operations procedures to reduce the risk as
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Website Redesign: A Case Study.
Wu, Jin; Brown, Janis F
2016-01-01
A library website redesign is a complicated and at times arduous task, requiring many different steps including determining user needs, analyzing past user behavior, examining other websites, defining design preferences, testing, marketing, and launching the site. Many different types of expertise are required over the entire process. Lessons learned from the Norris Medical Library's experience with the redesign effort may be useful to others undertaking a similar project.
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Online Sellers’ Website Quality Influencing Online Buyers’ Purchase Intention
Shea Lee, Tan; Ariff, Mohd Shoki Md; Zakuan, Norhayati; Sulaiman, Zuraidah; Zameri Mat Saman, Muhamad
2016-05-01
The increase adoption of Internet among young users in Malaysia provides high prospect for online seller. Young users aged between 18 and 25 years old are important to online sellers because they are actively involved in online purchasing and this group of online buyers is expected to dominate future online market. Therefore, examining online sellers’ website quality and online buyers’ purchase intention is crucial. Based on the Theory of planned behavior (TPB), a conceptual model of online sellers’ website quality and purchase intention of online buyers was developed. E-tailQ instrument was adapted in this study which composed of website design, reliability/fulfillment, security, privacy & trust, and customer service. Using online questionnaire and convenience sampling procedure, primary data were obtained from 240 online buyers aged between 18 to 25 years old. It was discovered that website design, website reliability/fulfillment, website security, privacy & trust, and website customer service positively and significantly influence intention of online buyers to continuously purchase via online channels. This study concludes that online sellers’ website quality is important in predicting online buyers’ purchase intention. Recommendation and implication of this study were discussed focusing on how online sellers should improve their website quality to stay competitive in online business.
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Hotel Overbooking and Cooperation with Third-Party Websites
Directory of Open Access Journals (Sweden)
Yufeng Dong
2015-08-01
Full Text Available Hotels cooperate with third-party websites to enhance their competitive position and attain sustainable development in the era of e-commerce. Furthermore, hotel managers overbook to hedge against last-minute cancellations and customer no-shows. This paper discusses pricing and overbooking strategies of a hotel in the context of cooperation with multiple third-party websites and analyzes how these strategies influence the cooperation process. The increase in profits resulting from the overbooking strategy is also examined. A model of a Stackelberg game between the hotel and third-party websites and a Nash game among the third-party websites are developed to analyze the process. Results indicate that the compensation coefficient has a slight influence on hotel pricing strategy, but causes a sharp decrease in overbooking level. As the hotel demands to lessen the probability of denying under higher compensation rate, the third-party websites would exert less sales effort to reduce the demand of online customers. Results also show that under a given market demand, hotel effort only serves to redistribute market shares among the hotel and third-party websites, without influencing hotel pricing and overbooking decisions. Specifically, the market shares of the third-party websites decrease in the effort level of the hotel resulting from an increase in the hotel market share. Finally, in the numerical example where one hotel and two websites are analyzed, hotel overbooking strategy improves hotel profit by 4.20%, whereas profit improvements for Websites 1 and 2 are as high as 5.26% and 5.21%, respectively. Managerial implications of the study are also provided.
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Towards a complete Fermi surface in underdoped high Tc superconductors
Harrison, Neil
The discovery of magnetic quantum oscillations in underdoped high Tc superconductors raised many questions, and initiated a quest to understand the origin of the Fermi surface the like of which had not been seen since the very first discovery of quantum oscillations in elemental bismuth. While studies of the Fermi surface of materials are today mostly assisted by computer codes for calculating the electronic band structure, this was not the case in the underdoped high Tc materials. The Fermi surface was shown to reconstructed into small pockets, yet there was no hint of a viable order parameter. Crucial clues to understanding the origin of the Fermi surface were provided by the small value of the observed Fermi surface cross-section, the negative Hall coefficient and the small electronic heat capacity at high magnetic fields. We also know that the magnetic fields were likely to be too weak to destroy the pseudogap and that vortex pinning effects could be seen to persist to high magnetic fields at low temperatures. I will show that the Fermi surface that appears to fit best with the experimental observations is a small electron pocket formed by connecting the nodal `Fermi arcs' seen in photoemission experiments, corresponding to a density-wave state with two different orthogonal ordering vectors. The existence of such order has subsequently been detected by x-ray scattering experiments, thereby strengthening the case for charge ordering being responsible for reconstructing the Fermi surface. I will discuss new efforts to understand the relationship between the charge ordering and the pseudogap state, discussing the fate of the quasiparticles in the antinodal region and the dimensionality of the Fermi surface. The author acknowledges contributions from Suchitra Sebastian, Brad Ramshaw, Mun Chan, Yu-Te Hsu, Mate Hartstein, Gil Lonzarich, Beng Tan, Arkady Shekhter, Fedor Balakirev, Ross McDonald, Jon Betts, Moaz Altarawneh, Zengwei Zhu, Chuck Mielke, James Day, Doug
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Assessing the Quality of Hospitals’ Websites in Khorasan Razavi Province
Directory of Open Access Journals (Sweden)
Meisam Dastani
2017-06-01
Full Text Available Background and Objectives: The aim of the present study was to demonstrate a clear vision of the quality status of Khorasan Razavi hospitals’ websites in four dimensions of content, performance, management and using the website. Material and Methods: This was a survey study. The sample size consisted of 49 hospital websites of Khorasan Razavi province. A check list including 21 components and four criteria (content, performance, management and how to use the website was used as the assessing instrument. Its validity and reliability have been proved through previous studies. Also, the data were analyzed using descriptive statistics. Results: The findings showed that only 59% of the hospitals in Khorasan Razavi had active websites. The overall status of the websites showed the following: too weak (51%, moderate (26.5% and weak (16.3%, respectively. Regarding the content, performance, management and using the website and design criteria, the findings showed that 40.8% of the websites had an unfavorable condition. Of the 16 high quality websites selected, only three websites including Sina Hospital in Mashhad, Javdoll-Aemeh in Mashhad and Razavi were in good condition; meanwhile the others were in poor condition. Conclusion: The results of this study indicated that most websites do not consider minimal medical standards and also, they could not establish good relationships with their audiences. In fact, in Iran, considering the quality and performance of websites has not been a priority for improving service quality in hospitals. The findings of this study can be effective in the identification and development of hospital websites quality criteria in terms of design, content, performance and management and how to use websites.
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A Retrospective Look at Website Accessibility over Time
Hackett, Stephanie; Parmanto, Bambang; Zeng, Xiaoming
2005-01-01
Websites were retrospectively analysed to study the effects that technological advances in web design have had on accessibility for persons with disabilities. A random sample of general websites and a convenience sample of US government websites were studied and compared for the years 1997-2002. Web accessibility barrier (WAB) and complexity…
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Website visibility the theory and practice of improving rankings
Weideman, Melius
2009-01-01
The quest to achieve high website rankings in search engine results is a prominent subject for both academics and website owners/coders. Website Visibility marries academic research results to the world of the information practitioner and contains a focused look at the elements which contribute to website visibility, providing support for the application of each element with relevant research. A series of real-world case studies with tested examples of research on website visibility elements and their effect on rankings are reviewed.Written by a well-respected academic and practitioner in the
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Applying machine learning to build a website interface adaptation system
MATESHUK EGOR; CHERNYSHEV ALEXANDER
2015-01-01
In this article we present the architecture and model of a website interface optimization system. We describe how we use clustering and genetic algorithms to automatically select a website interface with the highest conversion from website visitor to website user. In particular, we describe an algorithm for streamed clustering, which allows for real-time analysis of high traffic website users.
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Joule-Thomson Coefficient for Strongly Interacting Unitary Fermi Gas
International Nuclear Information System (INIS)
Liao Kai; Chen Jisheng; Li Chao
2010-01-01
The Joule-Thomson effect reflects the interaction among constituent particles of macroscopic system. For classical ideal gas, the corresponding Joule-Thomson coefficient is vanishing while it is non-zero for ideal quantum gas due to the quantum degeneracy. In recent years, much attention is paid to the unitary Fermi gas with infinite two-body scattering length. According to universal analysis, the thermodynamical law of unitary Fermi gas is similar to that of non-interacting ideal gas, which can be explored by the virial theorem P = 2E/3V. Based on previous works, we further study the unitary Fermi gas properties. The effective chemical potential is introduced to characterize the nonlinear levels crossing effects in a strongly interacting medium. The changing behavior of the rescaled Joule-Thomson coefficient according to temperature manifests a quite different behavior from that for ideal Fermi gas. (general)
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How to improve medical education website design.
Sisson, Stephen D; Hill-Briggs, Felicia; Levine, David
2010-04-21
The Internet provides a means of disseminating medical education curricula, allowing institutions to share educational resources. Much of what is published online is poorly planned, does not meet learners' needs, or is out of date. Applying principles of curriculum development, adult learning theory and educational website design may result in improved online educational resources. Key steps in developing and implementing an education website include: 1) Follow established principles of curriculum development; 2) Perform a needs assessment and repeat the needs assessment regularly after curriculum implementation; 3) Include in the needs assessment targeted learners, educators, institutions, and society; 4) Use principles of adult learning and behavioral theory when developing content and website function; 5) Design the website and curriculum to demonstrate educational effectiveness at an individual and programmatic level; 6) Include a mechanism for sustaining website operations and updating content over a long period of time. Interactive, online education programs are effective for medical training, but require planning, implementation, and maintenance that follow established principles of curriculum development, adult learning, and behavioral theory.
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The National Cancer Institute (NCI) website serves to disseminate authoritative, evidence-based, and up-to-date information about cancer and NCI-supported cancer research. Much of the information is available for content reuse and syndication.
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Internet poker websites and pathological gambling prevention policy.
Khazaal, Yasser; Chatton, Anne; Bouvard, Audrey; Khiari, Hiba; Achab, Sophia; Zullino, Daniele
2013-03-01
Despite the widespread increase in online poker playing and the risk related to excessive poker playing, research on online poker websites is still lacking with regard to pathological gambling prevention strategies offered by the websites. The aim of the present study was to assess the pathological gambling-related prevention strategies of online poker websites. Two keywords ("poker" and "poker help") were entered into two popular World Wide Web search engines. The first 20 links related to French and English online poker websites were assessed. Seventy-four websites were assessed with a standardized tool designed to rate sites on the basis of accountability, interactivity, prevention strategies, marketing, and messages related to poker strategies. Prevention strategies appeared to be lacking. Whereas a substantial proportion of the websites offered incitation to gambling such as betting "tips," few sites offered strategies to prevent or address problem gambling. Furthermore, strategies related to poker, such as probability estimation, were mostly reported without acknowledging their limitations. Results of this study suggest that more adequate prevention strategies for risky gambling should be developed for online poker.
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Impact of a dermatology wiki website on dermatology education.
Karimkhani, Chante; Boyers, Lindsay N; Ellis, Lixia Z; Brice, Sylvia; Chen, David L; Dunnick, Cory A; Dellavalle, Robert P
2015-01-15
The Dermatology Education Wiki (dermwiki) website serves as a resource platform for medical students and residents. The readily accessible interface provides dermatology articles, survival guides, didactic lectures, and links to faculty talks as well as research opportunities. To assess medical student and resident satisfaction with the dermwiki website. Fourth-year medical students taking a dermatology elective were provided with a temporary password to access relevant dermwiki information. A satisfaction survey was created to assess whether medical students found the website helpful. Second- and third-year dermatology residents were also surveyed to compare satisfaction scores prior to and after the introduction of the dermwiki website. End-of-rotation medical student exam scores were tabulated and compared to the average scores from years prior to the development of the dermwiki website. Medical students rated the dermatology elective with the dermwiki website higher than rotations without a wiki (8.12 vs 7.31). Students planning to go into dermatology were more satisfied with the dermwiki website, reported accessing the website more frequently (11 times vs 9.5 times), and reported more time spent studying (12.2 hours vs 6.7 hours) than students not going into dermatology. End-of-rotation medical student exam scores did not differ from those prior to the development of the demwiki website. Ten second- and third-year dermatology residents unanimously stated that they were more satisfied with the program after the institution of the dermwiki website. Overall, addition of the dermwiki website to the dermatology elective curriculum has improved medical student and resident satisfaction scores. The improvement is greater among students planning to enter the field of dermatology. This study serves as a model for the incorporation of internet-based interactive tools to transform and supplement the learning environment.
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Directory of Open Access Journals (Sweden)
Diyurman Gea
2014-06-01
Full Text Available The purpose of this study was to determine the quality of the websites managed by individuals, companies and governments. The test results would be useful for managers to pay more attention to the quality of the website optimally through several perspectives: accessibility, experience, marketing and technology. The research used samples from 350 websites and the data were divided into seven categories, namely: website managed by SMEs (small and medium, website of universities, website of governments, e-commerce, news websites, website of industrial companies, and website of non-profit organization. We used Nibler as the testing tool to facilitate the assessment process. Data were analyzed using WEKA presented in the form of a decision tree. The results showed that the tested websites had an average value of 4.66 or worse (scale 1-10. The conclusion is that the manager of the website should perform repairs on the data and applications, in particular in the perspective of technology, accessibility and experience.
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Dalen, Mie Birgitte
2015-01-01
A review of previous research about visual aesthetics revealed inconsistencies and contradicting views. Due to the important role of visual aesthetics in the online environment, a more thorough understanding of the construct was beneficial. Therefore, the first aim of this thesis was to develop a new structural framework of the dimensions of visual website aesthetics based on a review of previous research findings and theories. This conceptualisation process revealed that visua...
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The universal sound velocity formula for the strongly interacting unitary Fermi gas
International Nuclear Information System (INIS)
Liu Ke; Chen Ji-Sheng
2011-01-01
Due to the scale invariance, the thermodynamic laws of strongly interacting limit unitary Fermi gas can be similar to those of non-interacting ideal gas. For example, the virial theorem between pressure and energy density of the ideal gas P = 2E/3V is still satisfied by the unitary Fermi gas. This paper analyses the sound velocity of unitary Fermi gases with the quasi-linear approximation. For comparison, the sound velocities for the ideal Boltzmann, Bose and Fermi gas are also given. Quite interestingly, the sound velocity formula for the ideal non-interacting gas is found to be satisfied by the unitary Fermi gas in different temperature regions. (general)
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Tags on healthcare information websites
DEFF Research Database (Denmark)
Lykke, Marianne; Ådland, Marit Kristine
2018-01-01
This paper explores tags and tagging behaviour on health information websites using an empirical, user-oriented, exploratory case study. Taggers and editors were interviewed about tags and tagging, while taggers solved tasks that included applying tags to a website. This qualitative data...... articles, request information, and value article content. Some of these show that tags are not only not only topical descriptions, but communicative by intent. This result can potentially inform the design of tagging features....
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Peningkatan Niat Pembelian melalui Website
Directory of Open Access Journals (Sweden)
Wirawan Wirawan
2013-03-01
Full Text Available In globalization era, technology is rapidly growing. Nowadays many companies use technology in their business with the purpose to support internal and external activities, such as online sales. Currently, the level of competition in the field of online sales is getting bigger because there are many companies get into the market. The purpose of this study is to help new website of PT Pos Indonesia (Galeripos face competition and increase the intention of visitor to visit Galeripos and the number of transaction there as well. This study was conducted to know how website quality and perceived risk influence online trust of web visitors and the impact on online purchase intention. The method used in this research is path analysis. Data had collected by distributing questionnaires through social media. As conclusion, website quality, perceived risk, and online trust, individually and simultaneously, have significant influence on online purchase intention.
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Health Websites: Accessibility and Usability for American Sign Language Users
Kushalnagar, Poorna; Naturale, Joan; Paludneviciene, Raylene; Smith, Scott R.; Werfel, Emily; Doolittle, Richard; Jacobs, Stephen; DeCaro, James
2015-01-01
To date, there have been efforts towards creating better health information access for Deaf American Sign Language (ASL) users. However, the usability of websites with access to health information in ASL has not been evaluated. Our paper focuses on the usability of four health websites that include ASL videos. We seek to obtain ASL users’ perspectives on the navigation of these ASL-accessible websites, finding the health information that they needed, and perceived ease of understanding ASL video content. ASL users (N=32) were instructed to find specific information on four ASL-accessible websites, and answered questions related to: 1) navigation to find the task, 2) website usability, and 3) ease of understanding ASL video content for each of the four websites. Participants also gave feedback on what they would like to see in an ASL health library website, including the benefit of added captioning and/or signer model to medical illustration of health videos. Participants who had lower health literacy had greater difficulty in finding information on ASL-accessible health websites. This paper also describes the participants’ preferences for an ideal ASL-accessible health website, and concludes with a discussion on the role of accessible websites in promoting health literacy in ASL users. PMID:24901350
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THE ASSESSMENT OF ATTRACTION WEBSITES IN BRAȘOV COUNTY
Directory of Open Access Journals (Sweden)
CODRUȚA ADINA BĂLTESCU
2017-11-01
Full Text Available On-line communication is fundamental for tourism development. The possibility to access desired websites favors not only the attractiveness of a tourism destination, but also encourages visits. The ease of access, the content of the websites, the professionalism reflected in the website organisation and up-dating are elements that highlight the tourism operators’ interest towards their present and future clients. In Romania, the potential for the e-commerce development is huge. The statistical data included in this article support this statement. But, a careful analysis of the toursm websites reveals the existence of an unexpected and negative situation at the same time. The author analyzed the attraction websites in Brașov County, a famous tourist destination in our country. Although the number of tourism attractions is high, only three of them have their own websites. These websites were analyzed based on six groups of features, namely product information, non-product information, reservations, payment, functionality and customer relationship management. The results reveal the low degree of fulfillment for these parameters, the lack of online bookings, the lack of relevant tourist information such as the description of services offered within the tourist attraction or local transport modes, etc. The author proposes the completion of these websites, setting up new websites for prestigious tourism attractions included on the UNESCO Heritage List, as well as marketing researches among visitors in order to identify their expectations and the websites’ management accordingly.
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Compatibility of Firm Positioning Strategy and Website Content: Highest
Directory of Open Access Journals (Sweden)
Evla MUTLU KESİCİ
2017-07-01
Full Text Available Corporate websites are essential platforms through which firms introduce their goods and services on B2B and B2C level, express financial information for the stakeholders and share corporate values, purposes and activities. Due to its facilities, websites take part in firm positioning strategy. Accordingly this study aims to understand the innovation oriented positioning through corporate websites. The method applied in this study has been adapted from the 2QCV2Q Model developed by Mich and Franch (2000 to evaluate websites and top 30 firms with the highest Research and Development expenditures listed in Turkishtime (2015 have been analyzed. Within this context, this study presents a revised and updated method for the assessments of websites through positioning strategy framework. Findings indicate no direct relationship between website evaluation and R&D expenditure, though some common weaknesses have been put forward, such as information about management of the firms. Besides, publicly traded firms are recognized to facilitate websites more efficiently than non-publicly traded firms. Study contribute to both academia and practitioners as putting forward a new approach for 2QCV2Q Model and indicating the similarities and differences among the corporate websites through positioning perspective.
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Features influencing Islamic websites use: A Muslim user perspective
Directory of Open Access Journals (Sweden)
Mansur Aliyu
2013-06-01
Full Text Available Muslim scholars and organisations use the Internet through various websites to spread Islam globally. The presence of many websites providing Islamic contents online makes it necessary to examine their Islamic features and the factors that influence Muslims to use Islamic websites. This paper empirically investigates the Islamic features that influence the use of Islamic websites by Muslim users. The identified Islamic factors were grouped under five factors: beliefs, ethics, services, symbols, and values. A survey of 246 Muslim Islamic website users was conducted between November and December 2012 at the International Islamic University Malaysia (IIUM. The study develops and tests a path measurement model to confirm the psychometric properties of the five identified factors. The study found that Islamic features significantly influence Muslims to use Islamic websites. The measurement model and empirical results provide valuable indicators for the direction of future research and also suggest guidelines for developing Islamic websites that will easily influence many Internet users to visit them in order to learn about Islamic teachings and practices. The findings are also of considerable importance as they contribute to the present body of knowledge on Islamic websites’ evaluation and for practice in designing and developing quality Islamic websites.
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International Nuclear Information System (INIS)
Crabtree, G.W.; Aoki, H.; Joss, W.; Hulliger, F.
1987-01-01
This paper uses accurate Fermi surface measurements as a test of hybridization models in CeSb. Detailed measurements of the Fermi surface geometry and effective masses are presented which show a number of unusual properties associated with the magnetic structure and anisotropy. Measurements are compared with predictions of a band structure in which the f-electron is assumed to be local, interacting with the conduction electrons only through anisotropic Coulomb and exchange interactions. This model reproduces all the unusual features observed in the measurements and suggests that hybridization is not essential to describing the electronic properties of CeSb
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The Impact Of Website Design Features On Behavioral Intentions
Directory of Open Access Journals (Sweden)
Chun-Chin Chiu
2015-08-01
Full Text Available The design of a website interface plays an important role in online purchasing and customers are more likely to visit and buy from better-designed websites. However previous studies have not provided consistent information about the features a website should provide. Based on Hausman and Siekpes 2009 comprehensive model this study aims to empirically verify whether the model can be applied in e-service markets to predict and explain website users behavioral intentions trade intentions and revisit intentions. Based on the data from a survey of 303 Internet users the results indicate that computer factors and human factors the key website design features are significantly related to website users experiences perceived usefulness perceived entertainment value and perceived informativeness in turn significantly affect the intermediary outcomes of attitude toward the site and ultimately influence users behavioral intentions.
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Topology of Fermi surfaces and anomaly inflows
Energy Technology Data Exchange (ETDEWEB)
Adem, Alejandro; Camarena, Omar Antolín [Department of Mathematics, University of British Columbia,1984 Mathematics Road, Vancouver, V6T 1Z2 (Canada); Semenoff, Gordon W. [Department of Physics and Astronomy, University of British Columbia,6224 Agricultural Road, Vancouver, V6T 1Z1 (Canada); Sheinbaum, Daniel [Department of Mathematics, University of British Columbia,1984 Mathematics Road, Vancouver, V6T 1Z2 (Canada)
2016-11-14
We derive a rigorous classification of topologically stable Fermi surfaces of non-interacting, discrete translation-invariant systems from electronic band theory, adiabatic evolution and their topological interpretations. For systems on an infinite crystal it is shown that there can only be topologically unstable Fermi surfaces. For systems on a half-space and with a gapped bulk, our derivation naturally yields a K-theory classification. Given the d−1-dimensional surface Brillouin zone X{sub s} of a d-dimensional half-space, our result implies that different classes of globally stable Fermi surfaces belong in K{sup −1}(X{sub s}) for systems with only discrete translation-invariance. This result has a chiral anomaly inflow interpretation, as it reduces to the spectral flow for d=2. Through equivariant homotopy methods we extend these results for symmetry classes AI, AII, C and D and discuss their corresponding anomaly inflow interpretation.
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String effects on Fermi-Dirac correlation measurements
International Nuclear Information System (INIS)
Duran Delgado, R.M.; Gustafson, G.; Loennblad, L.
2007-01-01
We investigate some recent measurements of Fermi-Dirac correlations by the LEP collaborations indicating surprisingly small source radii for the production of baryons in e + e - annihilation at the Z 0 peak. In hadronization models there is besides the Fermi-Dirac correlation effect also a strong dynamical (anti-) correlation. We demonstrate that the extraction of the pure FD effect is highly dependent on a realistic Monte Carlo event generator, both for separation of those dynamical correlations that are not related to Fermi-Dirac statistics, and for corrections of the data and background subtractions. Although the model can be tuned to well reproduce single particle distributions, there are large model uncertainties when it comes to correlations between identical baryons. We therefore, unfortunately, have to conclude that it is at present not possible to draw any firm conclusion about the source radii relevant for baryon production at LEP. (orig.)
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Building business websites with Squarespace 7
Coffey, Miko
2015-01-01
This book is ideal for anyone who wants to learn how to use the latest version of Squarespace to create a website from scratch and take it through to go-live. You don't need any prior experience with Squarespace, HTML or CSS, or building websites in general as everything is done using Squarespace's simple, browser-based interface.
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Tan's distributions and Fermi-Huang pseudopotential in momentum space
DEFF Research Database (Denmark)
Valiente, Manuel
2012-01-01
form of the Fourier-transformed pseudopotential remains very simple. Operator forms for the so-called Tan's selectors, which, together with Fermi-Huang pseudopotential, largely simplify the derivation of Tan's universal relations for the Fermi gas, are here derived and are also very simple. A momentum...
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FERMI/LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LIST
International Nuclear Information System (INIS)
Abdo, A. A.; Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Atwood, W. B.; Axelsson, M.; Battelino, M.; Baldini, L.; Bellazzini, R.; Ballet, J.; Band, D. L.; Barbiellini, G.; Bastieri, D.; Baughman, B. M.; Bignami, G. F.; Bonamente, E.
2009-01-01
Following its launch in 2008 June, the Fermi Gamma-ray Space Telescope (Fermi) began a sky survey in August. The Large Area Telescope (LAT) on Fermi in three months produced a deeper and better resolved map of the γ-ray sky than any previous space mission. We present here initial results for energies above 100 MeV for the 205 most significant (statistical significance greater than ∼10σ) γ-ray sources in these data. These are the best characterized and best localized point-like (i.e., spatially unresolved) γ-ray sources in the early mission data.
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Fermi Large Area Telescope Bright Gamma-ray Source List
Energy Technology Data Exchange (ETDEWEB)
Abdo, Aous A.; /Naval Research Lab, Wash., D.C.; Ackermann, M.; /KIPAC, Menlo Park /SLAC; Ajello, M.; /KIPAC, Menlo Park /SLAC; Atwood, W.B.; /UC, Santa Cruz; Axelsson, M.; /Stockholm U., OKC /Stockholm U.; Baldini, L.; /INFN, Pisa; Ballet, J.; /DAPNIA, Saclay; Band, D.L.; /NASA, Goddard /NASA, Goddard; Barbiellini, Guido; /INFN, Trieste /Trieste U.; Bastieri, Denis; /INFN, Padua /Padua U.; Bechtol, K.; /KIPAC, Menlo Park /SLAC; Bellazzini, R.; /INFN, Pisa; Berenji, B.; /KIPAC, Menlo Park /SLAC; Bignami, G.F.; /Pavia U.; Bloom, Elliott D.; /KIPAC, Menlo Park /SLAC; Bonamente, E.; /INFN, Perugia /Perugia U.; Borgland, A.W.; /KIPAC, Menlo Park /SLAC; Bregeon, J.; /INFN, Pisa; Brigida, M.; /Bari U. /INFN, Bari; Bruel, P.; /Ecole Polytechnique; Burnett, Thompson H.; /Washington U., Seattle /Bari U. /INFN, Bari /KIPAC, Menlo Park /SLAC /IASF, Milan /IASF, Milan /DAPNIA, Saclay /ASDC, Frascati /INFN, Perugia /Perugia U. /KIPAC, Menlo Park /SLAC /George Mason U. /Naval Research Lab, Wash., D.C. /NASA, Goddard /KIPAC, Menlo Park /SLAC /INFN, Perugia /Perugia U. /KIPAC, Menlo Park /SLAC /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /KIPAC, Menlo Park /SLAC /ASDC, Frascati /NASA, Goddard /Maryland U. /Naval Research Lab, Wash., D.C. /INFN, Trieste /Pavia U. /Bari U. /INFN, Bari /KIPAC, Menlo Park /SLAC /UC, Santa Cruz /KIPAC, Menlo Park /SLAC /KIPAC, Menlo Park /SLAC /KIPAC, Menlo Park /SLAC /Montpellier U. /Bari U. /INFN, Bari /Ecole Polytechnique /NASA, Goddard; /more authors..
2009-05-15
Following its launch in 2008 June, the Fermi Gamma-ray Space Telescope (Fermi) began a sky survey in August. The Large Area Telescope (LAT) on Fermi in three months produced a deeper and better resolved map of the {gamma}-ray sky than any previous space mission. We present here initial results for energies above 100 MeV for the 205 most significant (statistical significance greater than {approx}10{sigma}) {gamma}-ray sources in these data. These are the best characterized and best localized point-like (i.e., spatially unresolved) {gamma}-ray sources in the early mission data.
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Development of the Nutrition4Kids website.
Williams, Michelle S
2012-01-01
According to the 2009 National Vital Statistics Report, cancer is the second-leading cause of death in the United States. Researchers have determined that consuming a diet low in fruits, vegetables, and whole grains is a common risk factor associated with the risk of developing several types of cancer including stomach, colorectal, breast, and pancreatic. Currently, there are few websites devoted to increasing students' knowledge about the role of a healthy diet in cancer prevention. The Nutrition4Kids website is a unique health education tool that targets youth aged 10 to 14 years. The website content and design were based on the Health Belief Model, the Information-Motivation and Behavioral Skills Model, and the principles of health literacy. The information included on the website was based on recommendations from the American Institute for Cancer Research and the World Cancer Research Fund. The website contains nutrition information, recipes that emphasize the consumption of fruits, vegetables, and whole grains, and interactive games. The primary objectives of the Nutrition4Kids website are to 1) increase students' knowledge of how poor dietary habits can affect their health, 2) increase students' knowledge of healthy dietary habits that can reduce their risk for cancer, 3) increase students' ability to prepare healthy, well-balanced meals and snacks, 4) increase students' ability to discuss healthy eating with their family and friends, and 5) increase students' knowledge of nutrients that have healthful benefits.
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Fermi liquid description of relativistic high density matter
Pal, K.; Dutt-Mazumder, A. K.
2011-06-01
We calculate pionic contribution to the relativistic Fermi Liquid parameters (RFLPs) using Chiral Effective Lagrangian. The RFLPs so determined are then used to calculate chemical potential, exchange energy due to πN interaction. We also compare the results of exchange energy from two loop ring diagrams involving σ, ω and π meson with what one obtains from the relativistic Fermi Liquid theory (RFLT).
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Designing attractive gamification features for collaborative storytelling websites.
Hsu, Shang Hwa; Chang, Jen-Wei; Lee, Chun-Chia
2013-06-01
Gamification design is considered as the predictor of collaborative storytelling websites' success. Although aforementioned studies have mentioned a broad range of factors that may influence gamification, they neither depicted the actual design features nor relative attractiveness among them. This study aims to identify attractive gamification features for collaborative storytelling websites. We first constructed a hierarchical system structure of gamification design of collaborative storytelling websites and conducted a focus group interview with eighteen frequent users to identify 35gamification features. After that, this study determined the relative attractiveness of these gamification features by administrating an online survey to 6333 collaborative storytelling websites users. The results indicated that the top 10 most attractive gamification features could account for more than 50% of attractiveness among these 35 gamification features. The feature of unpredictable time pressure is important to website users, yet not revealed in previous relevant studies. Implications of the findings were discussed.
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C3: A Collaborative Web Framework for NASA Earth Exchange
Foughty, E.; Fattarsi, C.; Hardoyo, C.; Kluck, D.; Wang, L.; Matthews, B.; Das, K.; Srivastava, A.; Votava, P.; Nemani, R. R.
2010-12-01
The NASA Earth Exchange (NEX) is a new collaboration platform for the Earth science community that provides a mechanism for scientific collaboration and knowledge sharing. NEX combines NASA advanced supercomputing resources, Earth system modeling, workflow management, NASA remote sensing data archives, and a collaborative communication platform to deliver a complete work environment in which users can explore and analyze large datasets, run modeling codes, collaborate on new or existing projects, and quickly share results among the Earth science communities. NEX is designed primarily for use by the NASA Earth science community to address scientific grand challenges. The NEX web portal component provides an on-line collaborative environment for sharing of Eearth science models, data, analysis tools and scientific results by researchers. In addition, the NEX portal also serves as a knowledge network that allows researchers to connect and collaborate based on the research they are involved in, specific geographic area of interest, field of study, etc. Features of the NEX web portal include: Member profiles, resource sharing (data sets, algorithms, models, publications), communication tools (commenting, messaging, social tagging), project tools (wikis, blogs) and more. The NEX web portal is built on the proven technologies and policies of DASHlink.arc.nasa.gov, (one of NASA's first science social media websites). The core component of the web portal is a C3 framework, which was built using Django and which is being deployed as a common framework for a number of collaborative sites throughout NASA.
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Assessing website pharmacy drug quality: safer than you think?
Directory of Open Access Journals (Sweden)
Roger Bate
Full Text Available BACKGROUND: Internet-sourced drugs are often considered suspect. The World Health Organization reports that drugs from websites that conceal their physical address are counterfeit in over 50 percent of cases; the U.S. Food and Drug Administration (FDA works with the National Association of Boards of Pharmacy (NABP to regularly update a list of websites likely to sell drugs that are illegal or of questionable quality. METHODS AND FINDINGS: This study examines drug purchasing over the Internet, by comparing the sales of five popular drugs from a selection of websites stratified by NABP or other ratings. The drugs were assessed for price, conditions of purchase, and basic quality. Prices and conditions of purchase varied widely. Some websites advertised single pills while others only permitted the purchase of large quantities. Not all websites delivered the exact drugs ordered, some delivered no drugs at all; many websites shipped from multiple international locations, and from locations that were different from those advertised on the websites. All drug samples were tested against approved U.S. brand formulations using Raman spectrometry. Many (17 websites substituted drugs, often in different formulations from the brands requested. These drugs, some of which were probably generics or perhaps non-bioequivalent copy versions, could not be assessed accurately. Of those drugs that could be assessed, none failed from "approved", "legally compliant" or "not recommended" websites (0 out of 86, whereas 8.6% (3 out of 35 failed from "highly not recommended" and unidentifiable websites. CONCLUSIONS: Of those drugs that could be assessed, all except Viagra(R passed spectrometry testing. Of those that failed, few could be identified either by a country of manufacture listed on the packaging, or by the physical location of the website pharmacy. If confirmed by future studies on other drug samples, then U.S. consumers should be able to reduce their risk by
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Non-Fermi glasses: fractionalizing electrons at finite energy density
Parameswaran, Siddharth; Gopalakrishnan, Sarang
Non-Fermi liquids are metals that cannot be adiabatically deformed into free fermion states. We argue for the existence of ``non-Fermi glasses,'' which are phases of interacting disordered fermions that are fully many-body localized, yet cannot be deformed into an Anderson insulator without an eigenstate phase transition. We explore the properties of such non-Fermi glasses, focusing on a specific solvable example. At high temperature, non-Fermi glasses have qualitatively similar spectral features to Anderson insulators. We identify a diagnostic, based on ratios of correlation functions, that sharply distinguishes between the two phases even at infinite temperature. We argue that our results and diagnostic should generically apply to the high-temperature behavior of the many-body localized descendants of fractionalized phases. S.A.P. is supported by NSF Grant DMR-1455366 and a UC President's Research Catalyst Award CA-15-327861, and S.G. by the Burke Institute at Caltech.
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Tools and Workflows for Collaborating on Static Website Projects
Directory of Open Access Journals (Sweden)
Kaitlin Newson
2017-10-01
Full Text Available Static website generators have seen a significant increase in popularity in recent years, offering many advantages over their dynamic counterparts. While these generators were typically used for blogs, they have grown in usage for other web-based projects, including documentation, conference websites, and image collections. However, because of their technical complexity, these tools can be inaccessible to content creators depending on their level of technical skill and comfort with web development technologies. Drawing from experience with a collaborative static website project, this article will provide an overview of static website generators, review different tools available for managing content, and explore workflows and best practices for collaborating with teams on static website projects.
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A Persian Cued Speech Website Fromthe Deaf Professionals’ Views
Directory of Open Access Journals (Sweden)
Guita Movallali
2013-10-01
Full Text Available Objectives: Increasingly people are using the internet to find information about medical and educational issues and one of the simplest ways to obtain information is internet. Persian Cued Speech is a very new system to Iranian families with deaf child and the professionals and a few educators have enough knowledge about it, so the purpose of this study was to introduce Persian Cued Speech website to deaf educators and rehabilitation professionals and assess their views about the website and their accessibility to important information through its use. Methods:The sample group was randomly selected fromdeaf educators and rehabilitation professionals working in different educational settings for deaf children in Tehran, our capital .They completed a questionnaire which was adopted from different website assessing questionnaires. Researchers also completed an interview with the sample group. Results: Our findings show that from the deaf educators and rehabilitation professionals point of view,the Persian Cued Speech website was a helpful and informing website. They also wanted more pictures and videos,bigger font sizes and more practical parts.So we decide to change some parts of the website to be more usable for them. Discussion: Using informational websites can be a very helpful tool in the internet area. Helpful websites are those which are more accessible, readable and appropriately designed and are user-friendly.
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Fermi liquid description of relativistic high density matter
International Nuclear Information System (INIS)
Pal, K.; Dutt-Mazumder, A.K.
2011-01-01
We calculate pionic contribution to the relativistic Fermi Liquid parameters (RFLPs) using Chiral Effective Lagrangian. The RFLPs so determined are then used to calculate chemical potential, exchange energy due to πN interaction. We also compare the results of exchange energy from two loop ring diagrams involving σ, ω and π meson with what one obtains from the relativistic Fermi Liquid theory (RFLT). (author)
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Design and implementation of website information disclosure assessment system.
Cho, Ying-Chiang; Pan, Jen-Yi
2015-01-01
Internet application technologies, such as cloud computing and cloud storage, have increasingly changed people's lives. Websites contain vast amounts of personal privacy information. In order to protect this information, network security technologies, such as database protection and data encryption, attract many researchers. The most serious problems concerning web vulnerability are e-mail address and network database leakages. These leakages have many causes. For example, malicious users can steal database contents, taking advantage of mistakes made by programmers and administrators. In order to mitigate this type of abuse, a website information disclosure assessment system is proposed in this study. This system utilizes a series of technologies, such as web crawler algorithms, SQL injection attack detection, and web vulnerability mining, to assess a website's information disclosure. Thirty websites, randomly sampled from the top 50 world colleges, were used to collect leakage information. This testing showed the importance of increasing the security and privacy of website information for academic websites.
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Design and implementation of website information disclosure assessment system.
Directory of Open Access Journals (Sweden)
Ying-Chiang Cho
Full Text Available Internet application technologies, such as cloud computing and cloud storage, have increasingly changed people's lives. Websites contain vast amounts of personal privacy information. In order to protect this information, network security technologies, such as database protection and data encryption, attract many researchers. The most serious problems concerning web vulnerability are e-mail address and network database leakages. These leakages have many causes. For example, malicious users can steal database contents, taking advantage of mistakes made by programmers and administrators. In order to mitigate this type of abuse, a website information disclosure assessment system is proposed in this study. This system utilizes a series of technologies, such as web crawler algorithms, SQL injection attack detection, and web vulnerability mining, to assess a website's information disclosure. Thirty websites, randomly sampled from the top 50 world colleges, were used to collect leakage information. This testing showed the importance of increasing the security and privacy of website information for academic websites.
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Discoveries by the Fermi Gamma Ray Space Telescope
Gehrels, Neil
2011-01-01
Fermi is a large space gamma-ray mission developed by NASA and the DOE with major contributions from France, Germany, Italy, Japan and Sweden. It was launched in June 2008 and has been performing flawlessly since then. The main instrument is the Large Area Telescope (LAT) operating in the 20 MeV to 300 GeV range and a smaller monitor instrument is the Gamma-ray Burst Monitor (GBM) operating in the 8 keV to 40 MeV range. New findings are occurring every week. Some of the key discoveries are: 1) Discovery of many new gamma-ray pulsars, including gamma-ray only and millisecond pulsars. 2) Detection of high energy gamma-ray emission from globular clusters, most likely due to summed emission from msec pulsars. 3) Discovery of delayed and extended high energy gamma-ray emission from short and long gamma-ray busts. 4) Detection of approximately 250 gamma-ray bursts per year with the GBM instrument. 5) Most accurate measurement of the cosmic ray electron spectrum between 30 GeV and 1 TeV, showing some excess above the conventional diffusion model. The talk will present the new discoveries and their implications.
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On the quantization of spin systems and Fermi systems
International Nuclear Information System (INIS)
Combe, P.; Rodriguez, R.; Sirugue, M.
1978-03-01
It is shown that spin operators and Fermi operators can be interpreted as the Weyl quantization of some functions on a classical phase space which is a compact group. Moreover the transition from quantum spin to Fermi operators is an isomorphism of the classical phase space preserving the Haar measure
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Two-Dimensional Homogeneous Fermi Gases
Hueck, Klaus; Luick, Niclas; Sobirey, Lennart; Siegl, Jonas; Lompe, Thomas; Moritz, Henning
2018-02-01
We report on the experimental realization of homogeneous two-dimensional (2D) Fermi gases trapped in a box potential. In contrast to harmonically trapped gases, these homogeneous 2D systems are ideally suited to probe local as well as nonlocal properties of strongly interacting many-body systems. As a first benchmark experiment, we use a local probe to measure the density of a noninteracting 2D Fermi gas as a function of the chemical potential and find excellent agreement with the corresponding equation of state. We then perform matter wave focusing to extract the momentum distribution of the system and directly observe Pauli blocking in a near unity occupation of momentum states. Finally, we measure the momentum distribution of an interacting homogeneous 2D gas in the crossover between attractively interacting fermions and bosonic dimers.
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Constrain the SED Type of Unidentified Fermi Objects
Directory of Open Access Journals (Sweden)
An-Li Tsai
2013-09-01
Full Text Available 2FGL J1823.8+4312 and 2FGL J1304.1-2415 are two unidentified Fermi objects which are associated with cluster of galaxies. In order to exam the possibility of cluster of galaxies as gamma-ray emitters, we search for counterpart of these two unidentified Fermi objects in other wavebands. However, we find other candidate to be more likely the counterpart of the unidentified Fermi object for both sources. We compare their light curves and SEDs in order to identify their source types. However, data at millimeter and sub-millimeter wavebands, which is important for us to constrain the SED at synchrotron peak, is lacking of measurement. Therefore, we proposed to SMA observation for these two sources. We have got data and are doing further analysis.
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Pham, Thai; Seery, Bernard D.
2015-01-01
The COR and PCOS Program Offices (PO) reside at the NASA Goddard Space Flight Center (GSFC), serving as the NASA Astrophysics Division's implementation arm for matters relating to the two programs. One aspect of the PO's activities is managing the COR and PCOS Strategic Astrophysics Technology (SAT) program, helping mature technologies to enable and enhance future astrophysics missions.The PO is guided by the National Research Council's 'New Worlds, New Horizons in Astronomy and Astrophysics' Decadal Survey report, and NASA's Astrophysics Implementation Plan. Strategic goals include dark energy; gravitational waves; X-ray observatories, e.g., US participation in ATHENA; Inflation probe; and a large UV/Visible telescope.To date, 51 COR and 65 PCOS SAT proposals have been received, of which 11 COR and 18 PCOS projects were funded. Notable successes include maturation of a new far-IR detector, later adopted by the SOFIA HAWC instrument; maturation of the H4RG near-IR detector, adopted by WFIRST; development of an antenna-coupled transition-edge superconducting bolometer, a technology deployed by BICEP2 that allowed measurement of B-mode polarization in the CMB signal, a possible signature of Inflation; and finally, the REXIS instrument on OSIRIS-REx is incorporating CCDs with directly deposited optical blocking filters developed by another SAT-funded project.We discuss our technology development process, with community input and strategic prioritization informing calls for SAT proposals and guiding investment decisions. We also present results of this year's technology gap prioritization and showcase our current portfolio of technology development projects. These include five newly selected projects, kicking off in FY 2015.For more information, visit the COR Program website at cor.gsfc.nasa.gov and the PCOS website at pcos.gsfc.nasa.gov.
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Computational Approach in Determination of 233U and 233Th Fermi Energy
International Nuclear Information System (INIS)
Kurniadi, R.; Perkasa, Y. S.; Waris, A.
2010-01-01
There are several methods to get Fermi energy such as hermit polynomial expansion and Wigner-Kirkwood expansion, these are analytical method. In this paper will be discussed numerical approach of calculating Fermi energy of 233 Th and 233 U nuclei. Our work demonstrates the simple technique of determining Fermi energy.
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Website Making Foundation Al-husna Using Macromedia Dreamweaver 4.0
Eka Febriyanti; Don Elsyafitra., SKom
2005-01-01
Website is one of the means to publish a firm or individual who has information to beknown by the wider community, especially users of internet service. At this writing willdiscuss ways in making website.The method used in this writing is to use Macromedia Dreamweaver 4.0 on Windows1998 and Internet Explorer as your browser Exploler 5. Reasons for using MacromediaDreamweaver 4.0 is to be able to design a website according to the author wishes.A good website is a website that can attract the a...
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WISER ranking of the African national libraries' websites | Gupta ...
African Journals Online (AJOL)
... as number of webpages, in-links, rich content files, publications in Google Scholar. It was also found that the website of National Library of South Africa also holds the first rank in WISER among the selected websites of African national libraries. Keywords: National, Libraries, Webometrics, WIF, WISER, Website, evaluation, ...
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Tuning the Fano factor of graphene via Fermi velocity modulation
Lima, Jonas R. F.; Barbosa, Anderson L. R.; Bezerra, C. G.; Pereira, Luiz Felipe C.
2018-03-01
In this work we investigate the influence of a Fermi velocity modulation on the Fano factor of periodic and quasi-periodic graphene superlattices. We consider the continuum model and use the transfer matrix method to solve the Dirac-like equation for graphene where the electrostatic potential, energy gap and Fermi velocity are piecewise constant functions of the position x. We found that in the presence of an energy gap, it is possible to tune the energy of the Fano factor peak and consequently the location of the Dirac point, by a modulation in the Fermi velocity. Hence, the peak of the Fano factor can be used experimentally to identify the Dirac point. We show that for higher values of the Fermi velocity the Fano factor goes below 1/3 at the Dirac point. Furthermore, we show that in periodic superlattices the location of Fano factor peaks is symmetric when the Fermi velocity vA and vB is exchanged, however by introducing quasi-periodicity the symmetry is lost. The Fano factor usually holds a universal value for a specific transport regime, which reveals that the possibility of controlling it in graphene is a notable result.
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Time-dependent Thomas-Fermi approach to nuclear monopole oscillations
International Nuclear Information System (INIS)
Pi, M.; Barranco, M.; Nemeth, J.; Ngo, C.; Tomasi, E.
1985-10-01
A Time-dependent Thomas-Fermi (TDTF) method has been used to study nuclear monopole oscillations and in particular, the semiclassical strength function S(E). An analysis of the S(E) moments, obtained by suitable integrations, shows that these results are in good agreement with data previously obtained from static Thomas-Fermi calculations
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Creating a Pilot Educational Psychiatry Website: Opportunities, Barriers, and Next Steps.
Torous, John; O'Connor, Ryan; Franzen, Jamie; Snow, Caitlin; Boland, Robert; Kitts, Robert
2015-11-05
While medical students and residents may be utilizing websites as online learning resources, medical trainees and educators now have the opportunity to create such educational websites and digital tools on their own. However, the process and theory of building educational websites for medical education have not yet been fully explored. To understand the opportunities, barriers, and process of creating a novel medical educational website. We created a pilot psychiatric educational website to better understand the options, opportunities, challenges, and processes involved in the creation of a psychiatric educational website. We sought to integrate visual and interactive Web design elements to underscore the potential of such Web technology. A pilot website (PsychOnCall) was created to demonstrate the potential of Web technology in medical and psychiatric education. Creating an educational website is now technically easier than ever before, and the primary challenge no longer is technology but rather the creation, validation, and maintenance of information for such websites as well as translating text-based didactics into visual and interactive tools. Medical educators can influence the design and implementation of online educational resources through creating their own websites and engaging medical students and residents in the process.
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Energy Technology Data Exchange (ETDEWEB)
Gaffney, J M
1975-01-01
A reappraisal of electromagnetic field theories is made and an account is given of the radiation gauge, Gupta-Bleuler and Fermi methods of quantitising the electromagnetic fields. The Weyl algebra of the vector potential is constructed and the Fermi method is then related to a certain representation of the algebra. The representation is specified by a generating functional for a state on the algebra. The Weyl algebra of the physical field is then constructed as a factor algebra. The Schroedinger representation of the algebra is then studied and it was found that the Fermi method is just a generalization of this representation to an infinite number of degrees of freedom. The Schroedinger representation of Fermi method is constructed.
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International Nuclear Information System (INIS)
Dasgupta, I.; Mookerjee, A.
1993-07-01
Based on the Augmented Space formalism proposed by one of us and a generalization of the alloy analogy, including the effect of the dynamics of the exchange bath, we show that a half-filled Hubbard model shows Fermi-liquid behaviour at low values of the interaction parameter U. This gives way to non-Fermi liquid behaviour at a critical U, where the system is still metallic. We also show that quenched disorder tends to lower this critical value of U. (author). 19 refs, 2 figs
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Neutron physics for nuclear reactors unpublished writings by Enrico Fermi
Fermi, Enrico; Pisanti, O
2010-01-01
This unique volume gives an accurate and very detailed description of the functioning and operation of basic nuclear reactors, as emerging from yet unpublished papers by Nobel Laureate Enrico Fermi. In the first part, the entire course of lectures on Neutron Physics delivered by Fermi at Los Alamos is reported, according to the version made by Anthony P French. Here, the fundamental physical phenomena are described very clearly and comprehensively, giving the appropriate physics grounds for the functioning of nuclear piles. In the second part, all the patents issued by Fermi (and coworkers) on
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Evaluation of Fermi read-out of the Atlas Tilecal prototype
International Nuclear Information System (INIS)
Ajaltouni, Z.; Alifanov, A.
1998-01-01
Prototypes of the FERMI system have been used to read out a prototype of the ATLAS hadron calorimeter in a beam test at the CERN SPS. The FERMI read-out system, using a compressor and a sampling ADC, is compared to a standard charge integrating read-out by measuring the energy resolution of the calorimeter separately with the two systems on the same events. Signal processing techniques have been designed to optimize the treatment of FERMI data. The resulting energy resolution is better than the one obtained with the standard read-out. (orig.)
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Investigating a Student-Driven Taxonomy for Library Website Design
Hulseberg, Anna; Monson, Sarah
2011-01-01
Libraries spend countless hours developing websites to connect users and resources. However, how much do we really know about what website terminology and features are meaningful to our patrons? And how can we best organize websites to facilitate access to resources? This article examines these questions by presenting a case study of a…
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Website Quality To Increase Franchise Marketing Performance Excellent
Directory of Open Access Journals (Sweden)
Erwin Halim
2016-06-01
Full Text Available According to Indonesia Association of Service Provider (APJII survey in 2014, the internet user in Indonesia increased up to around 88 million. This number expresses that the use of the internet to seek business franchise information will increase as well. The increase of internet using should be followed by the quality of franchisor's website. The franchisor's website will relate to system quality, information quality and service quality (DeLone and McLean, 2003. This research uses SEM LISREL to see the loading factors of each indicator impact in variables and website quality variables impact to intention to purchase franchise. The result shows that all variables (System quality, Information Quality, and Service Quality give significant impact to dependent variable Website Quality.
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Supernova Remnants with Fermi Large Area Telescope
Directory of Open Access Journals (Sweden)
Caragiulo M.
2017-01-01
Full Text Available The Large Area Telescope (LAT, on-board the Fermi satellite, proved to be, after 8 years of data taking, an excellent instrument to detect and observe Supernova Remnants (SNRs in a range of energies running from few hundred MeV up to few hundred GeV. It provides essential information on physical processes that occur at the source, involving both accelerated leptons and hadrons, in order to understand the mechanisms responsible for the primary Cosmic Ray (CR acceleration. We show the latest results in the observation of Galactic SNRs by Fermi-LAT.
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National library associations: websites and electronic discussion ...
African Journals Online (AJOL)
This article reviews the state of national library association websites in Africa based on an examination and analysis of the Botswana, Namibia, Nigeria, Swaziland, Tanzania and Zambia sites. Problems identified include lack of regular updates, technical errors, lack of funds to acquire quality website editing tools and ...
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Commercial Motor Vehicle Driving Safety Website
Tidwell, Scott; Trimble, Tammy; Blanco, Myra
2016-01-01
This report documents the CMV Driving Safety website (http://cmvdrivingsafety.org/), which was created by the National Surface Transportation Safety Center for Excellence (NSTSCE) as an outreach effort to assist commercial motor vehicle (CMV) fleets and drivers, driver trainers, CMV training schools, and insurance companies. The website contains 15 unique pages and provides six downloadable training modules on driver distraction, driver health, hours of service, driver drowsiness and fatigue,...
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Perception Analysis of Desktop and Mobile Service Website
Khoiriyah, Rizqiyatul
2016-01-01
The research was conducted as a qualitative study of the website to deeper explore and examine the analysis of user perception of desktop and mobile website services. This research reviewed about user perception of desktop and mobile service website used by using qualitative methods adapted to WebQual and User Experience approach. This qualitative research refered to the theoretical reference written by Creswell (2014). The expected outcome is to know the user perceptions of the available ser...
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Rotational dependence of Fermi-type resonance interactions in molecules
Mikhailov, Vladimir M.; Smirnov, M. A.
1997-03-01
In Pasadena, (Milliken Lab., USA, 1930) F. Rossetti has observed in Raman spectrum of carbon-dioxide molecule the full symmetric vibration of carbon dioxide appeared as the group of four near lying lines instead of the waited single line. The true interpretation of this enigmatic effect (in that time) was given by E. Fermi -- accidental degeneration of the first excited state of the full symmetric vibration in carbon dioxide. It was the first example of the event observed later in various organic molecules. This event was named as resonance Fermi. The rotational dependence of Fermi type resonance interactions in quasirigid molecules in dominant approximation can be selected in an expansion of the effective vibration-rotation Hamiltonian Hvib- roteff by the operator H(g)(Fermi) equals H30 plus (Sigma) nH3n(g). Let us consider in detail the problem of the construction of the effective vibration-rotational Hamiltonian HVR yields Heff from the point of view of various ordering schemes (grouping) of the vibrational-rotational interactions with sequential analysis of the choice of the convenient grouping adequate to the spectroscopic problem.
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Transference of Fermi Contour Anisotropy to Composite Fermions.
Jo, Insun; Rosales, K A Villegas; Mueed, M A; Pfeiffer, L N; West, K W; Baldwin, K W; Winkler, R; Padmanabhan, Medini; Shayegan, M
2017-07-07
There has been a surge of recent interest in the role of anisotropy in interaction-induced phenomena in two-dimensional (2D) charged carrier systems. A fundamental question is how an anisotropy in the energy-band structure of the carriers at zero magnetic field affects the properties of the interacting particles at high fields, in particular of the composite fermions (CFs) and the fractional quantum Hall states (FQHSs). We demonstrate here tunable anisotropy for holes and hole-flux CFs confined to GaAs quantum wells, via applying in situ in-plane strain and measuring their Fermi wave vector anisotropy through commensurability oscillations. For strains on the order of 10^{-4} we observe significant deformations of the shapes of the Fermi contours for both holes and CFs. The measured Fermi contour anisotropy for CFs at high magnetic field (α_{CF}) is less than the anisotropy of their low-field hole (fermion) counterparts (α_{F}), and closely follows the relation α_{CF}=sqrt[α_{F}]. The energy gap measured for the ν=2/3 FQHS, on the other hand, is nearly unaffected by the Fermi contour anisotropy up to α_{F}∼3.3, the highest anisotropy achieved in our experiments.
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Wildish, Anthony
2012-01-01
PhEDEx is the data-transfer management solution written by CMS. It consists of agents running at each site, a website for presentation of information, and a web-based data-service for scripted access to information. The website allows users to monitor the progress of data-transfers, the status of site agents and links between sites, and the overall status and behaviour of everything about PhEDEx. It also allows uses to make and approve requests for data-transfers and for deletion of data. It is the main point-of-entry for all users wishing to interact with PhEDEx. For several years, the website has consisted of a single perl program with about 10K SLOC. This program has limited capabilities for exploring the data, with only coarse filtering capabilities and no context-sensitive awareness. Graphical information is presented as static images, generated on the server, with no interactivity. It is also not well connected to the rest of the PhEDEx codebase, since much of it was written before the data-service wa...
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Time domain astronomy with Swift and Fermi | Gehrels | Rwanda ...
African Journals Online (AJOL)
Swift and Fermi are unveiling an unexpectedly rich tapestry of behavior in the transient γ−ray sky. Sources which were already known to be transient − such as pulsars, gamma-ray bursts, and blazars − have been studied in ever-increasing detail. For example, Fermi/LAT has detected 117 pulsars of which 56 are new.
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Consumer input into research: the Australian Cancer Trials website.
Dear, Rachel F; Barratt, Alexandra L; Crossing, Sally; Butow, Phyllis N; Hanson, Susan; Tattersall, Martin Hn
2011-06-26
The Australian Cancer Trials website (ACTO) was publicly launched in 2010 to help people search for cancer clinical trials recruiting in Australia, provide information about clinical trials and assist with doctor-patient communication about trials. We describe consumer involvement in the design and development of ACTO and report our preliminary patient evaluation of the website. Consumers, led by Cancer Voices NSW, provided the impetus to develop the website. Consumer representative groups were consulted by the research team during the design and development of ACTO which combines a search engine, trial details, general information about trial participation and question prompt lists. Website use was analysed. A patient evaluation questionnaire was completed at one hospital, one week after exposure to the website. ACTO's main features and content reflect consumer input. In February 2011, it covered 1, 042 cancer trials. Since ACTO's public launch in November 2010, until the end of February 2011, the website has had 2, 549 new visits and generated 17, 833 page views. In a sub-study of 47 patient users, 89% found the website helpful for learning about clinical trials and all respondents thought patients should have access to ACTO. The development of ACTO is an example of consumers working with doctors, researchers and policy makers to improve the information available to people whose lives are affected by cancer and to help them participate in their treatment decisions, including consideration of clinical trial enrolment. Consumer input has ensured that the website is informative, targets consumer priorities and is user-friendly. ACTO serves as a model for other health conditions.
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Evaluation of websites that contain information relating to malaria in pregnancy.
Hamwela, V; Ahmed, W; Bath, P A
2018-04-01
The study identified available websites on malaria in pregnancy on the World Wide Web and sought to evaluate their readability and information quality. A purposeful sample of websites were selected which provided information on Malaria in pregnancy. A total of 31 websites were identified from searches using Google, Yahoo and Bing search engines. Two generic tools (Discern and HON), one specific tool designed to assess information quality of malaria in pregnancy and readability tests (Flesch Reading Ease and Flesh-Kincaid Grade level) were used to evaluate the websites. Most of the websites scored below 50% with the HON Code tool, with most lacking information on the symptoms. One website scored over 70 with the reading ease with two (2) achieving a score of 7 for the reading level test. The readability of the websites was too advanced for an ordinary consumer. The results of this study indicated that the information quality of malaria in pregnancy websites varied from fair to medium. It was also found that the readability of the websites was too advanced for an ordinary consumer. These findings suggest that most websites are not comprehensive in addressing all the relevant aspects of malaria in pregnancy. Copyright © 2018 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.
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Effective field theories for superconducting systems with multiple Fermi surfaces
Energy Technology Data Exchange (ETDEWEB)
Braga, P.R., E-mail: pedro.rangel.braga@gmail.com [Departamento de Física Teórica, Instituto de Física, UERJ - Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, 20550-013 Maracanã, Rio de Janeiro (Brazil); Granado, D.R., E-mail: diegorochagrana@uerj.br [Departamento de Física Teórica, Instituto de Física, UERJ - Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, 20550-013 Maracanã, Rio de Janeiro (Brazil); Department of Physics and Astronomy, Ghent University, Krijgslaan 281-S9, 9000 Gent (Belgium); Guimaraes, M.S., E-mail: msguimaraes@uerj.br [Departamento de Física Teórica, Instituto de Física, UERJ - Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, 20550-013 Maracanã, Rio de Janeiro (Brazil); Wotzasek, C., E-mail: clovis@if.ufrj.br [Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro (Brazil)
2016-11-15
In this work we investigate the description of superconducting systems with multiple Fermi surfaces. For the case of one Fermi surface we re-obtain the result that the superconductor is more precisely described as a topological state of matter. Studying the case of more than one Fermi surface, we obtain the effective theory describing a time reversal symmetric topological superconductor. These results are obtained by employing a general procedure to construct effective low energy actions describing states of electromagnetic systems interacting with charges and defects. The procedure consists in taking into account the proliferation or dilution of these charges and defects and its consequences for the low energy description of the electromagnetic response of the system. We find that the main ingredient entering the low energy characterization of the system with more than one Fermi surface is a non-conservation of the canonical supercurrent triggered by particular vortex configurations.
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Rhetorical Features of the Company Website
DEFF Research Database (Denmark)
Nielsen, Anne Ellerup
2002-01-01
will discuss the functional and the compositional aspects of corporate communication on the World Wide Web by comparing company websites with traditional market communication media. I will focus on linguistic and visual features of the company website and briefly account for some of the media constraints......Recent years have seen a growing body of literature ceoncerned with the World Wide Web as a new form of communication, and numerous discussions on composition, structure and design of successful company websites are being held in all kinds of forums within and outside the Internet. However, most...... these discussions seem to focus on the technological properties of the Internet or tend to serve purely practical purposes and only few researchers discuss the rhetorical features of web communication, the exception being a litited number of researchers dealing with metaphors on the Web. In this paper I...
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On Realistically Attacking Tor with Website Fingerprinting
Directory of Open Access Journals (Sweden)
Wang Tao
2016-10-01
Full Text Available Website fingerprinting allows a local, passive observer monitoring a web-browsing client’s encrypted channel to determine her web activity. Previous attacks have shown that website fingerprinting could be a threat to anonymity networks such as Tor under laboratory conditions. However, there are significant differences between laboratory conditions and realistic conditions. First, in laboratory tests we collect the training data set together with the testing data set, so the training data set is fresh, but an attacker may not be able to maintain a fresh data set. Second, laboratory packet sequences correspond to a single page each, but for realistic packet sequences the split between pages is not obvious. Third, packet sequences may include background noise from other types of web traffic. These differences adversely affect website fingerprinting under realistic conditions. In this paper, we tackle these three problems to bridge the gap between laboratory and realistic conditions for website fingerprinting. We show that we can maintain a fresh training set with minimal resources. We demonstrate several classification-based techniques that allow us to split full packet sequences effectively into sequences corresponding to a single page each. We describe several new algorithms for tackling background noise. With our techniques, we are able to build the first website fingerprinting system that can operate directly on packet sequences collected in the wild.
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Australian health professionals' health website recommendation trends.
Usher, Wayne T
2011-08-01
This study was concerned with indentifying motivations and trends associated with a health website recommendation from eight of Australia's major health professions to the health consumer. Health professions included in this study are: psychiatrists, general practitioners, social workers, dietitians, chiropractors, physiotherapists, optometrists and pharmacists. An online survey (www.limesurvey.org) was developed from a common set of questions negotiated between all eight health professions. Survey questions were constructed in an attempt to identify participants' reasons for or against recommending a health website to a patient. A 5-point scale (not, slightly, neutral, moderately, strongly) to measure influence was used throughout the question set. This study indicates that Australian general practitioners (GPs) were the highest Australian health professionals to undertake a health website recommendation (86%), followed by psychiatrists (80%), with the lowest being physiotherapists (42%) and optometrists (33%). A profile of the Australian health professional who recommends a health website is identified as male, aged above 50 years, has had more than 10 years experience, works in a major city, is in private practice and has patient numbers exceeding 500 in a 12-month period (2009). Recommendations from this study include the need to develop mechanisms that identify high-quality online medical information and the development and implementation of Continuing Professional Development (CPD) courses which up-skill health professionals concerning the recommendation of health websites for health care delivery.
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Regular website transformation to mobile friendly methodology development
Miščenkov, Ilja
2017-01-01
Nowadays, rate of technology improvement grows faster than ever which results in increased mobile device usage. Internet users often choose to browse their favorite websites via computers as well as mobile devices, however, not every website is suited to be displayed on both types of technology. As an example the website of Vilnius University’s Mathematics and Informatics faculty. Therefore the objective of this work is to develop a step-by-step procedure which is used to turn a regular websi...
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GLOBAL PERCEPTION IN TRANSLATING THE CONTENT OF WEBSITES
Mariana Coancă
2012-01-01
Most of the time the visitors of a website are willing to purchase products if the content of the website is presented in their native language. Therefore, translators become the most import key, because they translate not only the words and sentences on the website, but also the general tone and the key messages, adapting each cultural reference. We focused on the translators’ task and we presented some techniques regarding the translation process. In order to exemplify this aspect, we selec...
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A search for neutrino emission from the Fermi bubbles with the ANTARES telescope
Energy Technology Data Exchange (ETDEWEB)
Adrian-Martinez, S.; Ardid, M.; Larosa, G.; Martinez-Mora, J.A. [Universitat Politecnica de Valencia, Institut d' Investigacio per a la Gestio Integrada de les Zones Costaneres (IGIC), Gandia (Spain); Albert, A.; Drouhin, D.; Racca, C. [GRPHE, Institut Universitaire de Technologie de Colmar, 34 rue du Grillenbreit, BP 50568, Colmar (France); Al Samarai, I.; Aubert, J.J.; Bertin, V.; Brunner, J.; Busto, J.; Carr, J.; Charif, Z.; Core, L.; Costantini, H.; Coyle, P.; Curtil, C.; Dornic, D.; Ernenwein, J.P.; Escoffier, S.; Lambard, E.; Riviere, C.; Vallee, C.; Vecchi, M.; Yatkin, K. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Andre, M. [Technical University of Catalonia, Laboratory of Applied Bioacoustics, Vilanova i la Geltru, Barcelona (Spain); Anton, G.; Classen, F.; Eberl, T.; Enzenhoefer, A.; Fehn, K.; Folger, F.; Fritsch, U.; Geisselsoeder, S.; Geyer, K.; Gleixner, A.; Graf, K.; Herold, B.; Hoessl, J.; James, C.W.; Kalekin, O.; Kappes, A.; Katz, U.; Lahmann, R.; Neff, M.; Richter, R.; Roensch, K.; Schmid, J.; Schnabel, J.; Seitz, T.; Shanidze, R.; Sieger, C.; Spies, A.; Wagner, S. [Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen Centre for Astroparticle Physics, Erlangen (Germany); Anvar, S.; Louis, F.; Schuessler, F.; Stolarczyk, T.; Vallage, B.; Vernin, P. [Institut de recherche sur les lois fondamentales de l' Univers, Service d' Electronique des Detecteurs et d' Informatique, CEA Saclay, Direction des Sciences de la Matiere, Gif-sur-Yvette Cedex (France); Astraatmadja, T.; Bogazzi, C.; Heijboer, A.J.; Jong, M. de; Michael, T.; Palioselitis, D.; Schulte, S.; Steijger, J.J.M.; Visser, E. [Nikhef, Science Park, Amsterdam (Netherlands); Baret, B.; Bouhou, B.; Creusot, A.; Galata, S.; Kouchner, A.; Elewyck, V. van [APC, Universite Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cite, Paris (France); Barrios-Marti, J.; Bigongiari, C.; Bouwhuis, M.C.; Emanuele, U.; Gomez-Gonzalez, J.P.; Hernandez-Rey, J.J.; Lambard, G.; Mangano, S.; Sanchez-Losa, A.; Yepes, H.; Zornoza, J.D.; Zuniga, J. [Universitat de Valencia, IFIC, Instituto de Fisica Corpuscular, Edificios Investigacion de Paterna, CSIC, Valencia (Spain); Basa, S.; Marcelin, M.; Nezri, E. [Pole de l' Etoile Site de Chateau-Gombert, LAM, Laboratoire d' Astrophysique de Marseille, Marseille Cedex 13 (France); Biagi, S.; Fusco, L.A.; Giacomelli, G.; Margiotta, A.; Spurio, M. [INFN, Sezione di Bologna, Bologna (Italy); Dipartimento di Fisica dell' Universita, Bologna (Italy); Capone, A.; De Bonis, G.; Fermani, P.; Perrina, C.; Simeone, F. [INFN, Sezione di Roma, Rome (Italy); Dipartimento di Fisica dell' Universita La Sapienza, Rome (Italy); Caramete, L.; Pavalas, G.E.; Popa, V. [Institute for Space Sciences, Bucharest, Magurele (Romania); Carloganu, C.; Dumas, A.; Gay, P.; Guillard, G. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, Laboratoire de Physique Corpusculaire, BP 10448, Clermont-Ferrand (France); Cecchini, S.; Chiarusi, T. [INFN, Sezione di Bologna, Bologna (Italy); Charvis, P.; Deschamps, A.; Hello, Y. [Geoazur, Universite Nice Sophia-Antipolis, CNRS/INSU, IRD, Observatoire de la Cote d' Azur, Sophia Antipolis (France); Circella, M. [INFN, Sezione di Bari, Bari (Italy); Coniglione, R.; Lattuada, D.; Riccobene, G.; Sapienza, P.; Trovato, A. [INFN, Laboratori Nazionali del Sud (LNS), Catania (Italy); Dekeyser, I.; Lefevre, D.; Martini, S.; Robert, A.; Tamburini, C. [Mediterranean Institute of Oceanography (MIO), Aix-Marseille University, Marseille Cedex 9 (France); Universit du Sud Toulon-Var, CNRS-INSU/IRD UM 110, La Garde Cedex (France); Donzaud, C. [APC, Universite Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cite, Paris (France); Universite Paris-Sud, Orsay Cedex (France); Dorosti, Q.; Loehner, H. [University of Groningen, Kernfysisch Versneller Instituut (KVI), Groningen (Netherlands); Flaminio, V. [INFN, Sezione di Pisa, Pisa (Italy); Dipartimento di Fisica dell' Universita, Pisa (Italy); Giordano, V. [INFN, Sezione di Catania, Catania (Italy); Haren, H. van [Royal Netherlands Institute for Sea Research (NIOZ), ' t Horntje (Texel) (Netherlands); Hugon, C.; Sanguineti, M. [INFN, Sezione di Genova, Genoa (Italy); Kadler, M. [Universitaet Wuerzburg, Institut fuer Theoretische Physik und Astrophysik, Wuerzburg (Germany); Kooijman, P. [Nikhef, Science Park, Amsterdam (Netherlands); Universiteit Utrecht, Faculteit Betawetenschappen, Utrecht (Netherlands); Universiteit van Amsterdam, Instituut voor Hoge-Energie Fysica, Amsterdam (Netherlands); Kreykenbohm, I.; Mueller, C.; Wilms, J. [Universitaet Erlangen-Nuernberg, Dr. Remeis-Sternwarte and ECAP, Bamberg (Germany); Kulikovskiy, V. [INFN, Sezione di Genova, Genoa (Italy); Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow (Russian Federation); Leonora, E.; Lo Presti, D. [INFN, Sezione di Catania, Catania (Italy); Dipartimento di Fisica ed Astronomia dell' Universita, Catania (Italy); Loucatos, S. [Institut de recherche sur les lois fondamentales de l' Univers, Service d' Electronique des Detecteurs et d' Informatique, CEA Saclay, Direction des Sciences de la Matiere, Gif-sur-Yvette Cedex (France); APC, Universite Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cite, Paris (France); Montaruli, T. [Mediterranean Institute of Oceanography (MIO), Aix-Marseille University, Marseille Cedex 9 (France); Universite de Geneve, Departement de Physique Nucleaire et Corpusculaire, Geneva (Switzerland); Morganti, M. [INFN, Sezione di Pisa, Pisa (Italy); Pradier, T. [Universite de Strasbourg et CNRS/IN2P3, IPHC-Institut Pluridisciplinaire Hubert Curien, 23 rue du Loess, BP 28, Strasbourg Cedex 2 (France); Rostovtsev, A. [ITEP, Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Samtleben, D.F.E. [Nikhef, Science Park, Amsterdam (Netherlands); Universiteit Leiden, Leids Instituut voor Onderzoek in Natuurkunde, Leiden (Netherlands); Taiuti, M. [Technical University of Catalonia, Laboratory of Applied Bioacoustics, Vilanova i la Geltru, Barcelona (Spain); Dipartimento di Fisica dell' Universita, Genoa (IT); Tayalati, Y. [University Mohammed I, Laboratory of Physics of Matter and Radiations, B.P.717, Oujda (MA); Wolf, E. de [Nikhef, Science Park, Amsterdam (NL); Universiteit van Amsterdam, Instituut voor Hoge-Energie Fysica, Amsterdam (NL); Collaboration: The ANTARES Collaboration
2014-02-15
Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin of the Fermi bubbles predict the emission of high-energy neutrinos and gamma rays with similar fluxes. The ANTARES detector, a neutrino telescope located in the Mediterranean Sea, has a good visibility to the Fermi bubble regions. Using data collected from 2008 to 2011 no statistically significant excess of events is observed and therefore upper limits on the neutrino flux in TeV range from the Fermi bubbles are derived for various assumed energy cutoffs of the source. (orig.)
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A search for neutrino emission from the Fermi bubbles with the ANTARES telescope
International Nuclear Information System (INIS)
Adrian-Martinez, S.; Ardid, M.; Larosa, G.; Martinez-Mora, J.A.; Albert, A.; Drouhin, D.; Racca, C.; Al Samarai, I.; Aubert, J.J.; Bertin, V.; Brunner, J.; Busto, J.; Carr, J.; Charif, Z.; Core, L.; Costantini, H.; Coyle, P.; Curtil, C.; Dornic, D.; Ernenwein, J.P.; Escoffier, S.; Lambard, E.; Riviere, C.; Vallee, C.; Vecchi, M.; Yatkin, K.; Andre, M.; Anton, G.; Classen, F.; Eberl, T.; Enzenhoefer, A.; Fehn, K.; Folger, F.; Fritsch, U.; Geisselsoeder, S.; Geyer, K.; Gleixner, A.; Graf, K.; Herold, B.; Hoessl, J.; James, C.W.; Kalekin, O.; Kappes, A.; Katz, U.; Lahmann, R.; Neff, M.; Richter, R.; Roensch, K.; Schmid, J.; Schnabel, J.; Seitz, T.; Shanidze, R.; Sieger, C.; Spies, A.; Wagner, S.; Anvar, S.; Louis, F.; Schuessler, F.; Stolarczyk, T.; Vallage, B.; Vernin, P.; Astraatmadja, T.; Bogazzi, C.; Heijboer, A.J.; Jong, M. de; Michael, T.; Palioselitis, D.; Schulte, S.; Steijger, J.J.M.; Visser, E.; Baret, B.; Bouhou, B.; Creusot, A.; Galata, S.; Kouchner, A.; Elewyck, V. van; Barrios-Marti, J.; Bigongiari, C.; Bouwhuis, M.C.; Emanuele, U.; Gomez-Gonzalez, J.P.; Hernandez-Rey, J.J.; Lambard, G.; Mangano, S.; Sanchez-Losa, A.; Yepes, H.; Zornoza, J.D.; Zuniga, J.; Basa, S.; Marcelin, M.; Nezri, E.; Biagi, S.; Fusco, L.A.; Giacomelli, G.; Margiotta, A.; Spurio, M.; Capone, A.; De Bonis, G.; Fermani, P.; Perrina, C.; Simeone, F.; Caramete, L.; Pavalas, G.E.; Popa, V.; Carloganu, C.; Dumas, A.; Gay, P.; Guillard, G.; Cecchini, S.; Chiarusi, T.; Charvis, P.; Deschamps, A.; Hello, Y.; Circella, M.; Coniglione, R.; Lattuada, D.; Riccobene, G.; Sapienza, P.; Trovato, A.; Dekeyser, I.; Lefevre, D.; Martini, S.; Robert, A.; Tamburini, C.; Donzaud, C.; Dorosti, Q.; Loehner, H.; Flaminio, V.; Giordano, V.; Haren, H. van; Hugon, C.; Sanguineti, M.; Kadler, M.; Kooijman, P.; Kreykenbohm, I.; Mueller, C.; Wilms, J.; Kulikovskiy, V.; Leonora, E.; Lo Presti, D.; Loucatos, S.; Montaruli, T.; Morganti, M.; Pradier, T.; Rostovtsev, A.; Samtleben, D.F.E.; Taiuti, M.; Tayalati, Y.; Wolf, E. de
2014-01-01
Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin of the Fermi bubbles predict the emission of high-energy neutrinos and gamma rays with similar fluxes. The ANTARES detector, a neutrino telescope located in the Mediterranean Sea, has a good visibility to the Fermi bubble regions. Using data collected from 2008 to 2011 no statistically significant excess of events is observed and therefore upper limits on the neutrino flux in TeV range from the Fermi bubbles are derived for various assumed energy cutoffs of the source. (orig.)
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Website development with PyroCMS
Vineyard, Zachary
2013-01-01
A practical and a fast-paced guide that gives you all the information you need to start developing websites with PyroCMS. The book is an excellent resource for developers and makes website development easy and financially viable for everyone.This book is ideal if you are a PHP developer who is looking for a great content management system or a web developer looking to speed up your development times. If you are a web developer, you will need to have some familiarity with OOP and the MVC programming pattern, especially if you want to extend PyroCMS by building add-ons.
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Craniofacial Surgery Fellowship Websites.
Silvestre, Jason; Agarwal, Divyansh; Taylor, Jesse A
2016-06-01
Applicants for craniofacial surgery fellowships utilize Internet-based resources like the San Francisco (SF) Match to manage applications. The purpose of this study was to evaluate the accessibility and content of craniofacial surgery fellowship websites (CSFWs). A list of available craniofacial surgery fellowships was compiled from directories of the American Society of Craniofacial Surgery (ACSFS) and SF Match. Accessibility of CSFWs was assessed via links from these directories and a Google search. Craniofacial surgery fellowship websites were evaluated on education and recruitment content and compared via program characteristics. Twenty-four of the 28 US-based craniofacial surgery fellowship programs had a CSFW (86%). The ACSFS and SF Match databases had limited CSFW accessibility, but a Google search revealed most CSFWs had the top search result (76%). In total, CSFWs provided an average of 39% of education and recruitment variables. While most programs provided fellowship program descriptions (96%), application links (96%), and faculty listings (83%), relatively few provided rotation schedules (13%), fellow selection process information (13%), or interview dates (8%). CSFW content did not vary by program location, faculty size, accreditation status, or institutional affiliations (P > 0.05). Craniofacial surgery fellowships often lack readily accessible websites from national program lists and have limited information for interested applicants. The consistent lack of online information across programs suggests future opportunities exist to improve these educational resources.
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Quantum critical fluctuations due to nested Fermi surface: The case of spinless fermions
International Nuclear Information System (INIS)
Schlottmann, P.
2007-01-01
A quantum critical point (QCP) can be obtained by tuning the critical temperature of a second-order phase transition to zero. A simple model of spinless fermions with nested Fermi surface leading to a charge density wave is considered. The QCP is obtained by tuning the nesting mismatch of the Fermi surface, which has the following consequences: (i) For the tuned QCP, the specific heat over T and the effective mass increase with the logarithm of the temperature as T is lowered. (ii) For the tuned QCP the linewidth of the quasi-particles is sublinear in T and ω. (iii) The specific heat and the linewidth display a crossover from non-Fermi liquid (∼T) to Fermi liquid (∼T 2 ) behavior with increasing nesting mismatch and decreasing temperature. (iv) For the tuned QCP, the dynamical charge susceptibility has a quasi-elastic peak with a linewidth proportional to T. (v) For non-critical Fermi vector mismatch the peak is inelastic. (vi) While the specific heat and the quasi-particle linewidth are only weakly dependent on the geometry of the nested Fermi surfaces, the momentum-dependent dynamical susceptibility is expected to be affected by the shape of the Fermi surface
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Thomas-Fermi theory for atomic nuclei revisited
International Nuclear Information System (INIS)
Centelles, M.; Schuck, P.; Vinas, X.
2007-01-01
The recently developed semiclassical variational Wigner-Kirkwood (VWK) approach is applied to finite nuclei using external potentials and self-consistent mean fields derived from Skyrme interactions and from relativistic mean field theory. VWK consists of the Thomas-Fermi part plus a pure, perturbative h 2 correction. In external potentials, VWK passes through the average of the quantal values of the accumulated level density and total energy as a function of the Fermi energy. However, there is a problem of overbinding when the energy per particle is displayed as a function of the particle number. The situation is analyzed comparing spherical and deformed harmonic oscillator potentials. In the self-consistent case, we show for Skyrme forces that VWK binding energies are very close to those obtained from extended Thomas-Fermi functionals of h 4 order, pointing to the rapid convergence of the VWK theory. This satisfying result, however, does not cure the overbinding problem, i.e., the semiclassical energies show more binding than they should. This feature is more pronounced in the case of Skyrme forces than with the relativistic mean field approach. However, even in the latter case the shell correction energy for e.g., 208 Pb turns out to be only ∼-6 MeV what is about a factor two or three off the generally accepted value. As an ad hoc remedy, increasing the kinetic energy by 2.5%, leads to shell correction energies well acceptable throughout the periodic table. The general importance of the present studies for other finite Fermi systems, self-bound or in external potentials, is pointed out
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An Analysis of European Online micro-lending Websites
Arvind Ashta; Djamchid Assadi
2009-01-01
Purpose of the paper: With the development of web 2.0, a new kind on lending is taking place on the internet, termed peer to peer lending or social lending. In Europe, this includes commercial lending websites such as Zopa, smava, boober, Kokos, Monetto. At the same time, following the lead of Kiva in the US, European microcredit web platforms are coming up including MyC4 and Babyloan in Europe. The paper examines how the legal design of the online websites differs from the microcredit websit...
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Theory of two-dimensional fermi liquids: Pt. 3
International Nuclear Information System (INIS)
Cui Shimin; Cai Jianhua
1990-01-01
The transport properties and sound propagation of 2-D Fermi liquids are discussed. Microscopic expressions for the coefficients of diffusion, viscosity and thermal conductivity are derived using Resibois method. Velocities of the zeroth and first sounds are calculated. Based on an analysis of collision integral, it is shown that a series of relaxtion time parameters is necessary to define precisely the sound propagation properties in 2-D Fermi liquids in contrast to the 3-D case
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The great silence science and philosophy of Fermi's paradox
Cirkovic, Milan M
2018-01-01
The Great Silence explores the multifaceted problem named after the great Italian physicist Enrico Fermi and his legendary 1950 lunchtime question "Where is everybody?" In many respects, Fermi's paradox is the richest and the most challenging problem for the entire field of astrobiology and the Search for ExtraTerrestrial Intelligence (SETI) studies. This book shows how Fermi's paradox is intricately connected with many fields of learning, technology, arts, and even everyday life. It aims to establish the strongest possible version of the problem, to dispel many related confusions, obfuscations, and prejudices, as well as to offer a novel point of entry to the many solutions proposed in existing literature. Cirkovic argues that any evolutionary worldview cannot avoid resolving the Great Silence problem in one guise or another.
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Fulde-Ferrell-Like Molecular States in Spin-Orbit Coupled Ultracold Fermi Gases
Ye, Chong; Fu, Li-Bin
2017-08-01
We study the molecular state in three-component Fermi gases with a single impurity of 6 Li immersing in a no-interacting Fermi sea of 40 K in the presence of an equal weight combination of Rashba-type and Dresselhaus-type spin-orbit coupling. In the region where the Fermi sea has two disjointed Fermi surfaces, we find that there are two Fulde-Ferrell-like molecular states with dominating contributions from the lower helicity branch. Decreasing the scattering length or the spin-orbit coupled Fermi energy, we find the Fulde-Ferrell-like molecular state with small center-of-mass momentum is always energy favored and the other one will suddenly disappear. Supported by the National Basic Research Program of China (973 Program) under Grant Nos. 2013CBA01502, 2013CB834100, and the National Natural Science Foundation of China under Grant Nos. 11374040, 11475027, 11575027, 11274051, and 11075020
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Consumer input into research: the Australian Cancer Trials website
Directory of Open Access Journals (Sweden)
Butow Phyllis N
2011-06-01
Full Text Available Abstract Background The Australian Cancer Trials website (ACTO was publicly launched in 2010 to help people search for cancer clinical trials recruiting in Australia, provide information about clinical trials and assist with doctor-patient communication about trials. We describe consumer involvement in the design and development of ACTO and report our preliminary patient evaluation of the website. Methods Consumers, led by Cancer Voices NSW, provided the impetus to develop the website. Consumer representative groups were consulted by the research team during the design and development of ACTO which combines a search engine, trial details, general information about trial participation and question prompt lists. Website use was analysed. A patient evaluation questionnaire was completed at one hospital, one week after exposure to the website. Results ACTO's main features and content reflect consumer input. In February 2011, it covered 1, 042 cancer trials. Since ACTO's public launch in November 2010, until the end of February 2011, the website has had 2, 549 new visits and generated 17, 833 page views. In a sub-study of 47 patient users, 89% found the website helpful for learning about clinical trials and all respondents thought patients should have access to ACTO. Conclusions The development of ACTO is an example of consumers working with doctors, researchers and policy makers to improve the information available to people whose lives are affected by cancer and to help them participate in their treatment decisions, including consideration of clinical trial enrolment. Consumer input has ensured that the website is informative, targets consumer priorities and is user-friendly. ACTO serves as a model for other health conditions.
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DEFF Research Database (Denmark)
Sørum, Hanne; Andersen, Kim Normann; Clemmensen, Torkil
2013-01-01
. Social implications – The overall digital enabled transformation of government appears to be guided by a rather heterogeneous set of quality standards. While a variance of quality standards might stimulate innovation in websites, it can also lead to a substantial difference in digital services provided...... to citizens. Thus, the authors' research stimulates the awareness of diversity of quality parameters and could have as an implication that national and international standards beyond accessibility standards are more explicitly shared and debated. Originality/value – The aim of this paper is to provide......Purpose – The objective of this paper is to investigate how webmasters within government bodies explain quality of websites. Despite the central position for advancing the communication, bridging usability tests and design, there are surprisingly few studies on how webmasters perceive, experience...
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Renormalization group and the superconducting susceptibility of a Fermi liquid
International Nuclear Information System (INIS)
Parameswaran, S. A.; Sondhi, S. L.; Shankar, R.
2010-01-01
A free Fermi gas has, famously, a superconducting susceptibility that diverges logarithmically at zero temperature. In this paper we ask whether this is still true for a Fermi liquid and find that the answer is that it does not. From the perspective of the renormalization group for interacting fermions, the question arises because a repulsive interaction in the Cooper channel is a marginally irrelevant operator at the Fermi liquid fixed point and thus is also expected to infect various physical quantities with logarithms. Somewhat surprisingly, at least from the renormalization group viewpoint, the result for the superconducting susceptibility is that two logarithms are not better than one. In the course of this investigation we derive a Callan-Symanzik equation for the repulsive Fermi liquid using the momentum-shell renormalization group, and use it to compute the long-wavelength behavior of the superconducting correlation function in the emergent low-energy theory. We expect this technique to be of broader interest.
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Spanish language content on reproductive endocrinology and infertility practice websites.
Londra, Laura C; Tobler, Kyle J; Omurtag, Kenan R; Donohue, Michael B
2014-11-01
To analyze the use of Spanish language translation on the websites of reproductive endocrinology and infertility (REI) practices in the context of evidence of underuse of infertility services by minority populations. Cross-sectional survey of websites from REI practices. Not applicable. None. None. Assessment of the relationship between having a Spanish-translated website and REI practice characteristics. Variables included concurrent use of social media, size of the practice, Spanish-speaking practitioner in the practice, being a private or a university-based practice, being in a mandated insurance state, and being in an area with different levels of percentage of Hispanic population, adjusted for annual income levels of the population. Of the 376 REI practice websites analyzed, 101 (27%) offered at least some information in Spanish. We identified 97 Spanish-speaking practitioners at 71 REI practices. Having a Spanish-translated website was significantly associated with the practice's use of social media, having an international/out-of-town web page, and having a Spanish-speaking physician in the practice. The size of the practice, as measured in number of cycles reported per year, was not associated with having a translated website. In practices located in the top 60 metropolitan areas by Hispanic population, the odds of having a Spanish-translated website were only related to the percentage of Hispanic population after adjusting for state-mandated insurance and average annual income level of the Hispanic population. Sixty-six of the websites with Spanish-translated content had been automatically translated. An additional eight websites were partially translated automatically. REI practices in metropolitan areas with a higher percentage of Hispanics were more likely to reach out to this minority population by translating their website content into Spanish. These practices were also more likely to use social media. Future studies are needed to determine whether
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Implementasi Highly Available Website Dengan Distributed Replicated Block Device
Directory of Open Access Journals (Sweden)
Mulyanto Mulyanto
2016-07-01
Full Text Available As an important IT infrastructure, website is a system which requires high reliability and availability levels. Website meets the criteria as a highly available system because website must provide services to clients in real time, handle a large amount of data, and not lose data during transaction. A highly available system must meet the condition of being able to run continuously as well as guaranteeing consistency on data requests. This study designed a website with high availability. The approach was building network cluster with failover and replicated block device functions. Failover was built to provide service availability, while replicated block device provides data consistency during failure of service. With failover cluster and replicated block device approaches, a cluster which is able to handle service failures of web server and database server on the website. The result of this study was the services of the website could run well if there was any failure in node members of the cluster. The system was able to provide 99,999 (five nines availability on database server services and 99,98 (three nines on web server services.
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The NASA Space Place: A Plethora of Games, Projects, and Fun Facts for Celebrating Astronomy
Leon, N. J.; Fisher, D. K.
2008-12-01
The Space Place is a unique NASA education and public outreach program. It includes a NASA website (spaceplace.nasa.gov) in English and Spanish that targets elementary age children with appealing, content- rich STEM material on space science, Earth science, and technology. The site features science and/or technology content related to, so far, over 40 NASA missions. This overall program, as well as special efforts planned for IYA2009, strongly support many of the objectives of IYA. Some of these are: 1. Stimulate interest in astronomy and science, especially among young people and in audiences not normally reached. 2. Increase scientific awareness. 3. Support and improve formal and informal science education. 4. Provide a contemporary image of science and scientists. 5. Facilitate new astronomy education networks and strengthen existing ones. 6. Improve the gender-balanced representation of scientists at all levels and promote greater involvement of underrepresented groups. The Space Place program has cultivated a large network of community partners (Obj. 5), including museums, libraries, and planetariums, as well as a large network of avocational astronomy societies. We send the community partners monthly mailings of the latest NASA materials for their "NASA Space Place" display boards (Obj. 1, 2, 3, 5). The astronomy societies receive original articles with the latest "insider" news on NASA missions for publication in their newsletters or on their websites (Obj. 2, 5). Through these leveraged partnerships, we reach a large audience of children; parents; formal and informal educators; rural, minority, and otherwise underserved audiences (Obj. 1, 6); and avocational astronomers, many of whom work with children and the general public in the classroom or at special events (Obj. 2, 3). Supporting Obj. 4, are the "Space Place Live" cartoon "talk show" episodes, spaceplace.nasa.gov/en/kids/live. For IYA 2009, we will specifically prepare our partners to plan and carry
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A search for neutrino emission from the Fermi bubbles with the ANTARES telescope
Adrian-Martinez, S.; Albert, A.; Al Samarai, I.; Andre, M.; Anton, G.; Anvar, S.; Ardid, M.; Astraatmadja, T.; Aubert, J.J.; Baret, B.; Barrios-Marti, J.; Basa, S.; Bertin, V.; Biagi, S.; Bigongiari, C.; Bogazzi, C.; Bouhou, B.; Bouwhuis, M.; Brunner, J.; Busto, J.; Capone, A.; Caramete, L.; Carloganu, C.; Carr, J.; Cecchini, S.; Charif, Z.; Charvis, P.; Chiarusi, T.; Circella, M.; Classen, F.; Coniglione, R.; Core, L.; Costantini, H.; Coyle, P.; Creusot, A.; Curtil, C.; De Bonis, G.; Dekeyser, I.; Deschamps, A.; Donzaud, C.; Dornic, D.; Dorosti, Q.; Drouhin, D.; Dumas, A.; Eberl, T.; Emanuele, U.; Enzenhofer, A.; Ernenwein, J.P.; Escoffier, S.; Fehn, K.; Fermani, P.; Flaminio, V.; Folger, F.; Fritsch, U.; Fusco, L.; Galata, S.; Gay, P.; Geisselsoder, S.; Geyer, K.; Giacomelli, G.; Giordano, V.; Gleixner, A.; Gomez-Gonzalez, J.P.; Graf, K.; Guillard, G.; van Haren, H.; Heijboer, A.; Hello, Y.; Hernandez-Rey, J.; Herold, B.; Hossl, J.; Hugon, C.; James, C.; de Jong, M.; Kadler, M.; Kalekin, O.; Kappes, A.; Katz, U.; Kooijman, P.; Kouchner, A.; Kreykenbohm, I.; Kulikovskiy, V.; Lahmann, R.; Lambard, E.; Lambard, G.; Larosa, G.; Lattuada, D.; Lefevre, D.; Leonora, E.; Lo Presti, D.; Loehner, H.; Loucatos, S.; Louis, F.; Mangano, S.; Marcelin, M.; Margiotta, A.; Martinez-Mora, J.; Martini, S.; Michael, T.; Montaruli, T.; Morganti, M.; Muller, C.; Neff, M.; Nezri, E.; Palioselitis, D.; Pavalas, G.E.; Perrina, C.; Popa, V.; Pradier, T.; Racca, C.; Riccobene, G.; Richter, R.; Riviere, C.; Robert, A.; Roensch, K.; Rostovtsev, A.; Samtleben, D.; Sanguineti, M.; Sapienza, P.; Schmid, J.; Schnabel, J.; Schulte, S.; Schussler, F.; Seitz, T.; Shanidze, R.; Sieger, C.; Simeone, F.; Spies, A.; Spurio, M.; Steijger, J.; Stolarczyk, T.; Sanchez-Losa, A.; Taiuti, M.; Tamburini, C.; Tayalati, Y.; Trovato, A.; Vallage, B.; Vallee, C.; Van Elewyck, V.; Vecchi, M.; Vernin, P.; Visser, E.; Wagner, S.; Wilms, J.; de Wolf, E.; Yatkin, K.; Yepes, H.; Zornoza, J.; Zuniga, J.; the ANTARES Collaboration
2014-01-01
Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin of the Fermi bubbles predict the emission of high-energy neutrinos and gamma
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Subjective and objective measurement of websites quality in a chemical industry
Directory of Open Access Journals (Sweden)
Julius Jillbert
2014-10-01
Full Text Available This paper assesses the Website of a chemical company, Deza, relative to strategy and Website quality. In an attempt to obtain both an objective and subjective measure of the quality of the Deza website, two assessment methods have been used. Firstly, a subjective assessment was conducted based on the WebQual survey instrument proposed by Barnes and Vidgen (2000. Secondly, a more objective assessment was conducted via an “informational content analysis”, based on the work of Carlson et. al. (2001. Analysis of the results of the WebQual survey suggest that overall, the Deza Website is perceived by the user as being of a higher quality than the Koppers Website, but a lower quality then the Nalon Website. The Information content analysis also ranks the Deza website as being superior to Koppers and inferior to Nalon.
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How can the curation of hands-on STEM activities power successful mobile apps and websites?
Porcello, D.; Peticolas, L. M.; Schwerin, T. G.
2015-12-01
The Lawrence Hall of Science (LHS) is University of California, Berkeley's public science center. Over the last decade, the Center for Technology Innovation at LHS has partnered with many institutions to establish a strong track record of developing successful technology solutions to support STEM teaching and learning within informal environments. Curation by subject-matter experts has been at the heart of many educational technology products from LHS and its partners that are directed at educators and families. This work includes: (1) popular digital libraries for inquiry-based activities at Howtosmile.org (NSF DRL #0735007) and NASA Earth and Space science education resources at NASAwavelength.org; and novel mobile apps like DIY Sun Science (NASA NNX10AE05G) and DIY Human Body (NIH 5R25OD010543) designed to scaffold exploration of STEM phenomena at home. Both NASA Wavelength and DIY Sun Science arose out of long-term collaborations with the Space Sciences Laboratory at UC Berkeley, Institute for Global Environmental Strategies (IGES), and other NASA-funded organizations, in partnership with NASA through cooperative agreements. This session will review the development, formative evaluation, and usage metrics for these two Earth and Space science-themed educational technology products directly relevant to the AGU community. Questions reviewed by presenters will include: What makes a good hands-on activity, and what essential information do educators depend on when searching for programming additions? What content and connections do families need to explore hands-on activities? How can technology help incorporate educational standards into the discovery process for learning experiences online? How do all these components drive the design and user experience of websites and apps that showcase STEM content?
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REVIEW KONSEP RESPONSIVE DESIGN DENGAN FRAMEWORK MATERIALIZE PADA WEBSITE
Cindy Novianty
2017-01-01
Responsive web design merupakan sebuah desain website yang dapat menyesuaikan tiap ukuran pada tiap device. Berdasarkan hasil dari beberapa responden menyatakan 62% responden setuju jika beberapa website yang belum mampu menyesuaikan ukuran tampilan web, 54% responden setuju bahwa desain yang responsive mempengaruhi faktor kenyamanan responden, 60% responden setuju bahwa konten utama dan fungsionalitas dari website yang sulit diakses melalui perangkat mobile, 56% responden setuju bahwa tampil...
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Model for paramagnetic Fermi systems
International Nuclear Information System (INIS)
Ainsworth, T.L.; Bedell, K.S.; Brown, G.E.; Quader, K.F.
1983-01-01
We develop a mode for paramagnetic Fermi liquids. This model has both direct and induced interactions, the latter including both density-density and current-current response. The direct interactions are chosen to reproduce the Fermi liquid parameters F/sup s/ 0 , F/sup a/ 0 , F/sup s/ 1 and to satify the forward scattering sum rule. The F/sup a/ 1 and F/sup s/,a/sub l/ for l>1 are determined self-consistently by the induced interactions; they are checked aginst experimental determinations. The model is applied in detail to liquid 3 He, using data from spin-echo experiments, sound attenuation, and the velocities of first and zero sound. Consistency with experiments gives definite preferences for values of m. The model is also applied to paramagnetic metals. Arguments are given that this model should provide a basis for calculating effects of magnetic fields
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Assessment of Project Website Sustainability: Case of the Arctic EIA Project
Directory of Open Access Journals (Sweden)
Sonja H Bickford
2016-07-01
Full Text Available In many cases, temporary websites may be simple, accessible solutions for knowledge management and dissemination of information. However, such sites may become outdated as the funding ends, but yet in many cases, still publicly available through the Internet. The issue of website sustainability is a relevant topic for all organizations that have websites. Website lifecycle, knowledge management, and website sustainability issues are discussed through a theoretical-based literature review. These issues are then summarized and used as lessons learned for the case study approach of this paper. The aim is to identify a solution to address a website’s life and longevity, post project. A practical case study assessment of the issue of project website sustainability is needed to address the website’s longevity—post project—as creation is often made through temporary endeavors. Recommendations for future project websites are made as the outcomes and results of this study and are expressed in the form of suggested practices for project website sustainability in future projects.
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An evaluation of telehealth websites for design, literacy, information and content.
Whitten, Pamela; Holtz, Bree; Cornacchione, Jennifer; Wirth, Christina
2011-01-01
We examined 62 telehealth websites using four assessment criteria: design, literacy, information and telehealth content. The websites came from the member list of the American Telemedicine Association and the Office for the Advancement of Telehealth and partner sites, and were included if they were currently active and at least three clicks deep. Approximately 130 variables were examined for each website by two independent researchers. The websites reviewed contained most of the design variables (mean 74%, SD 6), but fewer of those relating to literacy (mean 26%, SD 6), website information (mean 35%, SD 16) and telehealth content (mean 37%, SD 18). Only 29% of websites encouraged users to ask about telehealth, and 19% contained information on overcoming telehealth barriers. Nonetheless, 84% promoted awareness of telehealth. All evaluation assessments were significantly correlated with each other except for literacy and information. The present study identified various matters that should be addressed when developing telehealth websites. Although much of this represents simple common sense in website design, our evaluation demonstrates that there is still much room for improvement.
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Komunikasi Corporate Social Responsibility pada Official Website Perusahaan Badan Usaha Milik Negara
Directory of Open Access Journals (Sweden)
Nurjannah Nurjannah
2017-05-01
Full Text Available This study describes Corporate Social Responsibility (CSR message on official website of State Owned Enterprises (SOEs and features of official website as CSR communication medium. Quantitative content analysis is used as the method. Data were analyzed by using descriptive statistics. This study selected 55 Indonesian SOEs official website. The result shows that state-owned companies have not applied transparency of CSR communication messages on their official website. The study finds that a number of state-owned companies do not present CSR information on their official website. In general, CSR communication on the official website of state-owned companies is limited to presenting information related to government program called Partnership Program and Community Development (PKBL. The official websites of state-owned companies have not utilized potential use of the website as communication medium of CSR. State-owned companies have not fully realized the role of official website as strategic media in conveying CSR communication message.
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Observation of hidden Fermi surface nesting in a two dimensional conductor
International Nuclear Information System (INIS)
Breuer, K.; Stagerescu, C.; Smith, K.E.; Greenblatt, M.; Ramanujachary, K.
1996-01-01
We report the first direct measurement of hidden Fermi surface nesting in a two dimensional conductor. The system studied was Na 0.9 Mo 6 O 17 , and the measured Fermi surface consists of electron and hole pockets that can be combined to form sets of pseudo-one-dimensional Fermi surfaces, exhibiting the nesting necessary to drive a Peierls transition to a charge density wave state. The observed nesting vector is shown to be in excellent agreement with theory. copyright 1996 The American Physical Society
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Website Detection Using Remote Traffic Analysis
Gong, Xun; Kiyavash, Negar; Schear, Nabíl; Borisov, Nikita
2011-01-01
Recent work in traffic analysis has shown that traffic patterns leaked through side channels can be used to recover important semantic information. For instance, attackers can find out which website, or which page on a website, a user is accessing simply by monitoring the packet size distribution. We show that traffic analysis is even a greater threat to privacy than previously thought by introducing a new attack that can be carried out remotely. In particular, we show that, to perform traffi...
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Factors Adopting E-Travel Website: The Case of Indonesia
Vera Pujani; Alfitman; Refdinal Nazir
2012-01-01
E-travel is travel agency-s companies employing internet and website as e-commerce context. This study presents numerous initial key factors of electronic travel model based on small travel agencies perspectives. Browsing previous studies related to website travel activities are conducted. Five small travel agencies in Indonesia has been deeply interviewed in case studies. The finding of this research is identifying numerous characteristics and dimension factors and travel website operations ...
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Conceptualising how SMEs incorporate green content in their websites
Craig M. Parker; Emilia Bellucci; Luba Torlina; Ambika Zutshi; Bardo Fraunholz
2014-01-01
This paper presents a framework on how Small and Medium Enterprises (SMEs) can proactively incorporate content relating to their ecological responsibility (or green) activities in their websites. SME studies offer limited guidance on, and conceptualisation of, how organisations can incorporate different types of content into their website designs. This paper addresses this problem by presenting the results of an exploratory, qualitative content analysis of Australian SME websites where emerge...
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Accessing Earth Science Data Visualizations through NASA GIBS & Worldview
Cechini, M. F.; Boller, R. A.; Baynes, K.; Wong, M. M.; King, B. A.; Schmaltz, J. E.; De Luca, A. P.; King, J.; Roberts, J. T.; Rodriguez, J.; Thompson, C. K.; Pressley, N. N.
2017-12-01
For more than 20 years, the NASA Earth Observing System (EOS) has operated dozens of remote sensing satellites collecting nearly 15 Petabytes of data that span thousands of science parameters. Within these observations are keys the Earth Scientists have used to unlock many things that we understand about our planet. Also contained within these observations are a myriad of opportunities for learning and education. The trick is making them accessible to educators and students in convenient and simple ways so that effort can be spent on lesson enrichment and not overcoming technical hurdles. The NASA Global Imagery Browse Services (GIBS) system and NASA Worldview website provide a unique view into EOS data through daily full resolution visualizations of hundreds of earth science parameters. For many of these parameters, visualizations are available within hours of acquisition from the satellite. For others, visualizations are available for the entire mission of the satellite. Accompanying the visualizations are visual aids such as color legends, place names, and orbit tracks. By using these visualizations, educators and students can observe natural phenomena that enrich a scientific education. This poster will provide an overview of the visualizations available in NASA GIBS and Worldview and how they are accessed. We invite discussion on how the visualizations can be used or improved for educational purposes.
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Application of the Thomas-Fermi statistical model to the thermodynamics of high density matter
International Nuclear Information System (INIS)
Martin, R.
1977-01-01
The Thomas-Fermi statistical model, from the N-body point of view is used in order to have systematic corrections to the T-Fermi's equation. Approximate calculus methods are found from analytic study of the T-Fermi's equation for non zero temperature. T-Fermi's equation is solved with the code ''Golem''written in Fortran V (Univac). It also provides the thermodynamical quantities and a new method to calculate several isothermal tables. (author) [es
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Application of the Thomas-Fermi statistical model to the thermodynamics of high density matter
International Nuclear Information System (INIS)
Martin, R.
1977-01-01
The Thomas-Fermi statistical model, from the N-body point of view is used in order to have systematic corrections to the T-Fermis equation. Approximate calculus methods are found from analytic study of the T-Fermis equation for non zero temperature. T-Fermis equation is solved with the code GOLEM written in FORTRAN V (UNIVAC). It also provides the thermodynamical quantities and a new method to calculate several isothermal tables. (Author) 24 refs
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Modeling the instability behavior of thin film devices: Fermi Level Pinning
Moeini, Iman; Ahmadpour, Mohammad; Gorji, Nima E.
2018-05-01
We investigate the underlying physics of degradation/recovery of a metal/n-CdTe Schottcky junction under reverse or forward bias stressing conditions. We used Sah-Noyce-Shockley (SNS) theory to investigate if the swept of Fermi level pinning at different levels (under forward/reverse bias) is the origin of change in current-voltage characteristics of the device. This theory is based on Shockley-Read-Hall recombination within the depletion width and takes into account the interface defect levels. Fermi Level Pinning theory was primarily introduced by Ponpon and developed to thin film solar cells by Dharmadasa's group in Sheffield University-UK. The theory suggests that Fermi level pinning at multiple levels occurs due to high concentration of electron-traps or acceptor-like defects at the interface of a Schottky or pn junction and this re-arranges the recombination rate and charage collection. Shift of these levels under stress conditions determines the change in current-voltage characteristics of the cell. This theory was suggested for several device such as metal/n-CdTe, CdS/CdTe, CIGS/CdS or even GaAs solar cells without a modeling approach to clearly explain it's physics. We have applied the strong SNS modeling approach to shed light on Fermi Level Pinning theory. The modeling confirms that change in position of Fermi Level and it's pining in a lower level close to Valence band increases the recombination and reduces the open-circuit voltage. In contrast, Fermi Level pinning close to conduction band strengthens the electric field at the junction which amplifies the carrier collection and boosts the open-circuit voltage. This theory can well explain the stress effect on device characteristics of various solar cells or Schottky junctions by simply finding the right Fermi level pinning position at every specific stress condition.
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Nishimura, K.; Kakihana, M.; Nakamura, A.; Aoki, D.; Harima, H.; Hedo, M.; Nakama, T.; Ōnuki, Y.
2018-05-01
We grew high-quality single crystals of AuSb2 with the pyrite (FeS2)-type cubic structure by the Bridgman method and studied the Fermi surface properties by the de Haas-van Alphen (dHvA) experiment and the full potential LAPW band calculation. The Fermi surfaces of AuSb2 are found to be similar to those of NiSbS and PdBiSe with the ullmannite (NiSbS)-type cubic chiral structure because the crystal structures are similar each other and the number of valence electrons is the same between two different compounds. Note that each Fermi surface splits into two Fermi surfaces in NiSbS and PdBiSe, reflecting the non-centrosymmetric crystal structure.
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FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C
International Nuclear Information System (INIS)
Abdo, A. A.; Ackermann, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Bouvier, A.; Asano, K.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Bellazzini, R.; Bregeon, J.; Ballet, J.; Band, D. L.; Barbiellini, G.; Bastieri, D.; Bhat, P. N.; Bissaldi, E.; Bonamente, E.
2009-01-01
The Fermi Gamma-ray Space Telescope has opened a new high-energy window in the study of gamma-ray bursts (GRBs). Here we present a thorough analysis of GRB 080825C, which triggered the Fermi Gamma-ray Burst Monitor (GBM), and was the first firm detection of a GRB by the Fermi Large Area Telescope (LAT). We discuss the LAT event selections, background estimation, significance calculations, and localization for Fermi GRBs in general and GRB 080825C in particular. We show the results of temporal and time-resolved spectral analysis of the GBM and LAT data. We also present some theoretical interpretation of GRB 080825C observations as well as some common features observed in other LAT GRBs.
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Website Design and Localisation: A Comparison of Malaysia and Britain
Directory of Open Access Journals (Sweden)
Tanveer Ahmed
2008-06-01
Full Text Available This study aims to explore the local cultural values on Malaysian and British websites selected from different sectors. In recent years, a number of studies have addressed the issue of local culture in website design, but most of the studies have focused on USA representing western cultures, whereas Chinese and Japanese cultures have been the main focal point of Asian cultures. This study intends to fill this gap, focusing on less-debated cultures: Malaysia and Britain. It applies Hofstede’s individualism/collectivism, and power distance, and Hall’s high/low-context cultural dimensions, and analyses how these cultural values are reflected in Malaysian and British websites. A content analysis of the websites highlights considerable differences in representing local cultural values on the local websites.
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WEBSITE DESIGN AND LOCALISATION: A COMPARISON OF MALAYSIA AND BRITAIN
Directory of Open Access Journals (Sweden)
Tanveer Ahmed
2008-06-01
Full Text Available This study aims to explore the local cultural values on Malaysian and British websites selected from different sectors. In recent years, a number of studies have addressed the issue of local culture in website design, but most of the studies have focused on USA representing western cultures, whereas Chinese and Japanese cultures have been the main focal point of Asian cultures. This study intends to fill this gap, focusing on less-debated cultures: Malaysia and Britain. It applies Hofstede’s individualism/collectivism, and power distance, and Hall’s high/low-context cultural dimensions, and analyses how these cultural values are reflected in Malaysian and British websites. A content analysis of the websites highlights considerable differences in representing local cultural values on the local websites.
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FERMI(at)Elettra FEL Design Technical Optimization Final Report
International Nuclear Information System (INIS)
Fawley, William; Penn, Gregory; Allaria, Enrico; De Ninno, Giovanni; Graves, William
2006-01-01
This is the final report of the FEL Design Group for the Technical Optimization Study for the FERMI(at)ELETTRA project. The FERMI(at)ELETTRA project is based on the principle of harmonic upshifting of an initial ''seed'' signal in a single pass, FEL amplifier employing multiple undulators. There are a number of FEL physics principles which underlie this approach to obtaining short wavelength output: (1) the energy modulation of the electron beam via the resonant interaction with an external laser seed (2) the use of a chromatic dispersive section to then develop a strong density modulation with large harmonic overtones (3) the production of coherent radiation by the microbunched beam in a downstream radiator. Within the context of the FERMI project, we discuss each of these elements in turn
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Professionalism and Commercialism on Cosmetic Surgeons' Websites.
Park, Sung-Yeon; Park, SangHee
2017-07-01
This study analyzed the homepages of 250 cosmetic surgeons' websites by focusing on the representation of cosmetic surgery providers, cosmetic surgery recipients, and cosmetic surgery practice itself. Based on a literature review, some common elements of the webpages were preidentified as the indicators of professionalism or commercialism. Subsequently, each homepage was scrutinized for their presence and salience. Overall, cosmetic surgeons' websites were high in professionalism and low in commercialism in their representation of the service providers. In depicting the recipients, the websites were moderate in both professionalism and commercialism. The representation of practice was low in professionalism and moderate in commercialism. Implications of these findings for doctors, regulators, and consumer advocates are discussed and directions for future research are proposed.
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Participatory Design of Websites with Web Design Workshops
Directory of Open Access Journals (Sweden)
Alison Bersani
2008-03-01
Full Text Available At the University of Rochester's River Campus Libraries we have included users in technology development with great success. "Participatory design" entails collaboration among designers, developers, and users from the earliest stages of conception through to implementation of websites and other technology. Using participatory methods, a project to redesign the library website began with workshops to identify user needs and preferences. The results of these workshops led to the identification of key tasks for the main page. They also generated a hierarchy of tasks for sub-pages and rich information about how students and faculty members use current websites in their work. In our article, we explain our reasons for running participatory design workshops, describe our methods, review participants and recruitment, and summarize key findings. We also include information about our local implementation and general conclusions about the value of design workshops for website design and development.
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Theoretical reconsideration of antiferromagnetic Fermi surfaces in URu2Si2
International Nuclear Information System (INIS)
Yamagami, Hiroshi
2011-01-01
In an itinerant 5f-band model, the antiferromagnetic (AFM) Fermi surfaces of URu 2 Si 2 are reconsidered using a relativistic LAPW method within a local spin-density approximation, especially taking into account the lattice parameters dependent on pressures. The reduction of the z-coordinate of the Si sites results in the effect of flattening the Ru-Si layers of URu 2 Si 2 crystal structure, thus weakening a hybridization/mixing between the U-5f and Ru-4d states in the band structure. Consequently the 5f bands around the Fermi level are more flat in the dispersion with decreasing the z-coordinate, thus producing three closed Fermi surfaces like 'curing-stone', 'rugby-ball' and 'ball'. The origins of de Haas-van Alphen branches can be qualitatively interpreted from the obtained AFM Fermi surfaces.
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Conceptualising how SMEs incorporate green content in their websites
Directory of Open Access Journals (Sweden)
Craig M. Parker
2014-11-01
Full Text Available This paper presents a framework on how Small and Medium Enterprises (SMEs can proactively incorporate content relating to their ecological responsibility (or green activities in their websites. SME studies offer limited guidance on, and conceptualisation of, how organisations can incorporate different types of content into their website designs. This paper addresses this problem by presenting the results of an exploratory, qualitative content analysis of Australian SME websites where emergent themes are interpreted using framing and legitimacy theories. It describes three dimensions (location, presentation, and specificity which comprise the framework, under which the themes are grouped. The paper outlines how scholars can use the framework to develop models and carry out evaluations regarding how SMEs embed green content, and potentially other specific content types, in their websites. It also summarises how the framework can assist SMEs (or website developers serving them make informed decisions regarding framing their websites as green, or de-emphasising this content, by paying attention to its location (e.g. homepage, navigation bars and presentation (e.g. how paragraphs, images, etc are used within webpages. The legitimacy or credibility of the green content can be enhanced using different types of specificity (e.g. statistics, detail of processes and actions, and third-party substantiation.
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Superallowed Fermi β decay studies at TRIUMF-ISAC
Svensson, C. E.; Dunlop, R.; Finlay, P.; Ball, G. C.; Ettenauer, S.; Leslie, J. R.; Towner, I. S.; Andreoiu, C.; Austin, R. A. E.; Bandyopadhyay, D.; Chagnon-Lessard, S.; Chester, A.; Cross, D. S.; Demand, G.; Djongolov, M.; Garnsworthy, A. B.; Garrett, P. E.; Green, K. L.; Glister, J.; Grinyer, G. F.; Hackman, G.; Hadinia, B.; Leach, K. G.; Pearson, C. J.; Phillips, A. A.; Rand, E. T.; Starosta, K.; Sumithrarachchi, C. S.; Tardiff, E. R.; Triambak, S.; Williams, S. J.; Wong, J.; Yates, S. W.; Zganjar, E. F.
2013-10-01
A program of high-precision superallowed Fermi β decay studies is being carried out at the Isotope Separator and Accelerator (ISAC) radioactive ion beam facility at TRIUMF. Recent high-precision branching ratio measurements for the superallowed decays of 74Rb and 26Alm, as well as a half-life measurement for 26Alm that is the most precise half-life measurement for any superallowed emitter to date, are reported. These results provide demanding tests of the theoretical isospin symmetry breaking corrections in superallowed Fermi β decays.
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Analyzing the security posture of South African websites
CSIR Research Space (South Africa)
Mtsweni, Jabu, S
2015-08-12
Full Text Available observed. Research studies also suggest that over 80% of the active websites are vulnerable to a myriad of attacks. This paper reports on a study conducted to passively analyze and determine the security posture of over 70 South African websites from...
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Factors shaping the user experience on utiliterian websites
Hompe, T.; Leker, J.; Mast, C. van der; Neerincx, M.A.
2007-01-01
This paper explores factors that influence the user experience when using utilitarian websites. A theoretical model for the user experience of utilitarian websites is proposed and investigated. This model is an extension of the Technology Acceptance Model (TAM). The effects of perceived ease of use,
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CONTENT ANALYSIS OF HOTEL WEBSITES: CASE STUDY OF CROATIA
Suzana Markovic; Sanja Raspor; Tomislav Car; Jelena Komsic
2012-01-01
In the competitive hotel industry the content of hotel websites has an important role in achieving and maintaining business success and profitability. The purpose of this study is to analyze the websites of a selected group of hotels (three, four and five star) by applying content analysis by six dimensions (contact information, information about facilities, reservations and the surrounding area, as well as communication with customers and web-site functionality) and 22 characteristics. The a...
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Upgrade the website of Nuclear Training Center for online training
International Nuclear Information System (INIS)
Nguyen Minh Duc; Nguyen Thuy Hang; Nguyen Thi Lien; Luu Thi Thu Hoa; Pham Thi Thu Trang
2017-01-01
In 2016, Nuclear Training Center (NTC) proposed the task of improving and upgrading NTC website’s technology for better performance, more attractive interface and more accessible information to site visitors. This website will be designed to meet the demand for integrated online training site, integrated training management page later. For this task, it is expected to build a website with full modules, English interface of website and especially, the professional website to apply online training technology and tightly integrated close to the present site of a nuclear training center. (author)
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Analysis of Usage Patterns in Large Multimedia Websites
Singh, Rahul; Bhattarai, Bibek
User behavior in a website is a critical indicator of the web site's usability and success. Therefore an understanding of usage patterns is essential to website design optimization. In this context, large multimedia websites pose a significant challenge for comprehension of the complex and diverse user behaviors they sustain. This is due to the complexity of analyzing and understanding user-data interactions in media-rich contexts. In this chapter we present a novel multi-perspective approach for usability analysis of large media rich websites. Our research combines multimedia web content analysis with elements of web-log analysis and visualization/visual mining of web usage metadata. Multimedia content analysis allows direct estimation of the information-cues presented to a user by the web content. Analysis of web logs and usage-metadata, such as location, type, and frequency of interactions provides a complimentary perspective on the site's usage. The entire set of information is leveraged through powerful visualization and interactive querying techniques to provide analysis of usage patterns, measure of design quality, as well as the ability to rapidly identify problems in the web-site design. Experiments on media rich sites including the SkyServer - a large multimedia web-based astronomy information repository demonstrate the efficacy and promise of the proposed approach.
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Design element alternatives for stress-management intervention websites.
Williams, Reg A; Gatien, Gary; Hagerty, Bonnie
2011-01-01
Typical public and military-sponsored websites on stress and depression tend to be prescriptive. Some require users to complete lengthy questionnaires. Others reproduce printed flyers, papers, or educational materials not adapted for online use. Some websites require users to follow a prescribed path through the material. Stress Gym was developed as a first-level, evidence-based, website intervention to help U.S. military members learn how to manage mild to moderate stress and depressive symptoms using a self-help intervention with progress tracking and 24/7 availablility. It was designed using web-based, health-management intervention design elements that have been proven effective and users reported they prefer. These included interactivity, self-pacing, and pleasing aesthetics. Users learned how to manage stress by accessing modules they choose, and by practicing proven stress management strategies interactively immediately after login. Test results of Stress Gym with Navy members demonstrated that it was effective, with significant decreases in reported perceived stress levels from baseline to follow-up assessment. Stress Gym used design elements that may serve as a model for future websites to emulate and improve upon, and as a template against which to compare and contrast the design and functionality of future online, health-intervention websites. Copyright © 2011 Elsevier Inc. All rights reserved.
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Nonextensive Thomas-Fermi model
Shivamoggi, Bhimsen; Martinenko, Evgeny
2007-11-01
Nonextensive Thomas-Fermi model was father investigated in the following directions: Heavy atom in strong magnetic field. following Shivamoggi work on the extension of Kadomtsev equation we applied nonextensive formalism to father generalize TF model for the very strong magnetic fields (of order 10e12 G). The generalized TF equation and the binding energy of atom were calculated which contain a new nonextensive term dominating the classical one. The binding energy of a heavy atom was also evaluated. Thomas-Fermi equations in N dimensions which is technically the same as in Shivamoggi (1998) ,but behavior is different and in interesting 2 D case nonextesivity prevents from becoming linear ODE as in classical case. Effect of nonextensivity on dielectrical screening reveals itself in the reduction of the envelope radius. It was shown that nonextesivity in each case is responsible for new term dominating classical thermal correction term by order of magnitude, which is vanishing in a limit q->1. Therefore it appears that nonextensive term is ubiquitous for a wide range of systems and father work is needed to understand the origin of it.
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Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La₂-xSrxCuO₄.
Chang, J; Månsson, M; Pailhès, S; Claesson, T; Lipscombe, O J; Hayden, S M; Patthey, L; Tjernberg, O; Mesot, J
2013-01-01
High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid quasiparticle excitations break down in momentum space. Here we show, using angle-resolved photoemission spectroscopy, that the Fermi liquid quasiparticle excitations of the overdoped superconducting cuprate La1.77Sr0.23CuO4 is highly anisotropic in momentum space. The quasiparticle scattering and residue behave differently along the Fermi surface and hence the Kadowaki-Wood's relation is not obeyed. This kind of Fermi liquid breakdown may apply to a wide range of strongly correlated metal systems where spin fluctuations are present.
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Evaluation of E-Commerce Website Functionality Using a Mamdani Fuzzy System
Directory of Open Access Journals (Sweden)
L. Al-Qaisi
2015-10-01
Full Text Available The majority of leader companies are running their businesses using online E-commerce websites. These E-commerce websites are becoming significant revenue drivers and major retailers. Hence, it is critical to evaluate the functionality of these websites which are expected to support growing business needs. The evaluation of the functionality of E-commerce websites is not a straightforward process due to the many constraints and standards that should be considered. Fuzzy logic is a powerful technique used in modeling impreciseness and uncertainties. This paper proposes a Mamdani fuzzy system that evaluates the functionality of E-commerce websites over different parameters: accuracy, flexibility, client support, and availability of product information. Experimental results provide positive relations between accuracy and flexibility on the functionality of E-commerce websites.
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A Webometric Investigation of Visibility and Collaboration of Iranian Nanotechnology Websites
Directory of Open Access Journals (Sweden)
Faramarz Sohili
2007-07-01
Full Text Available The present investigation intends to review the extent of visibility, impact and collaboration of Iranian nanotechnology websites using webometric method of link analysis. The sample consists of all websites dealing with nanotechnology in Iran. Findings showed that these sites have low visibility, web impact factor and page count. Iranian Nanotechnology Initiative, Nano Ideas and Iranian Nanotechnology Association had the highest number of inlinks and therefore highest visibility, while Nanotechnology Department Website had the lowest visibility. Findings also indicated that Amir Kabir Technical University Nanotechnology Committee website, Iran Nanotechnology initiative and Nano Ideas websites had the highest web impact factor, while Kashan University Institute for Nano Science and Technology had the lowest web impact factor. It was further established that Iranian Nanotech websites collaborate within two clusters. A Multi-dimensional scale was used.
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Analisis Web Accessibility Pada Perancangan Website Chat
Yushan, Subhansyah
2011-01-01
Chat is a popular application where one user can communicate to another using text. Nowadays in the internet, many websites provide chat applications, such as Instant Messaging, Yahoo Messanger, and etc. Website which provides chat application cannot accomodate users who have any dissabilities, especialy users with visual disabilities. This situation makes communication process more complicated, where accessibility level of sending and receiving information has became low. The ...
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Consumers’ responses to brand websites: An interdisciplinary review
Voorveld, H.A.M.; Neijens, P.C.; Smit, E.G.
2009-01-01
Purpose - The aims of this paper are to provide an integrated literature review of factors influencingconsumers’ responses to brand websites; to describe the state of research in the past ten years; and togive an overview of the theories used in brand website studies. Design/methodology/approach -
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Evaluation Of Delta State E-Government Website | Chete ...
African Journals Online (AJOL)
The study evaluates Delta state government website by adopting the method used since 2001 in evaluating national government websites. The questionnaire and web survey techniques were adopted for this study. The data from the questionnaire was analyzed using statistical package for social sciences (SPSS) and the ...
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16 CFR 305.20 - Paper catalogs and websites.
2010-01-01
... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Paper catalogs and websites. 305.20 Section 305.20 Commercial Practices FEDERAL TRADE COMMISSION REGULATIONS UNDER SPECIFIC ACTS OF CONGRESS RULE... Disclosures § 305.20 Paper catalogs and websites. (a) Any manufacturer, distributor, retailer, or private...
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Unidentified EGRET sources and their possible Fermi counterparts
International Nuclear Information System (INIS)
Lyapin, A R; Arkhangelskaja, I V; Larin, D S
2017-01-01
Unidentified EGRET sources from 3EG catalog have been analyzed. Preliminary data analysis has shown at least 23 of these sources coincide with those in 3FGL Fermi catalogue within 1, 2 and 3 sigma error intervals of the coordinates and fluxes. Their properties are discussed in the presented work. Even 3-sigma difference allows supposing sources similarity because of more than 3-sigma distinctions in values of fluxes between identified EGRET sources and their Fermi counterparts. For instance, the coincidence between 3EG J1255-0549 and 3FGL J1256.1-0547 was reported in Fermi catalogues 1FGL, 2FGL, 3FGL. However, these sources fluxes (in units of 10 −8 photons × cm −2 × s −1 ) in the energy band E > 100 MeV were 179.7 ± 6.7 (3EG), 44.711 ± 0.724 (3FGL), 53.611 ± 0.997 (2FGL) and 67.939 ± 1.861 (1FGL). Such effect was observed for sufficient portion of identified EGRET sources. It could cause by troubles of particles identification by Fermi/LAT trigger system. Very often charged particles recognized as gamma-quanta because of wrong backsplash analysis. Nevertheless, gammas counts as charged particles due analogous reason and rejected during ground data processing. For example, it appears as geomagnetic modulation presence on gamma-quanta count rate latitudinal profiles in energy band E > 20 MeV. (paper)
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College Students' Perceived Attributes of Internet Websites and Online Shopping
Seock, Yoo-Kyoung; Norton, Marjorie J. T.
2008-01-01
The purpose of this study was to examine perceptions of attributes of clothing retailers' Internet websites in relation to previous and intended future purchase from the websites. Survey data from 414 U.S. college students, non-married and aged 18-22 with online clothing shopping experience and favorite clothing websites were used. Five clothing…
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Magnetic breakdown in an array of overlapping Fermi surfaces
International Nuclear Information System (INIS)
Kadigrobov, A.M.; Radić, D.; Bjeliš, A.
2015-01-01
We develop a theoretical framework for a magnetic breakdown in an array of circular two-dimensional bands with a finite overlap of neighboring Fermi surfaces due to the presence of a presumably weak periodic potential, and apply the obtained results to the electron bands in carbon honeycomb structures of doped graphene and intercalated graphite compounds. In contrast to the standard treatment, inaugurated more than fifty years ago by Slutskin and Kadigrobov, with electron semiclassical trajectories encircling significantly overlapping Fermi surfaces, we examine a configuration in which bands are related in a way that the Fermi surfaces only slightly overlap, forming internal band pockets with areas of the size comparable to the area of the quantum magnetic flux for a given external magnetic field. Such band configuration has to be treated quantum mechanically. The calculation leads to the results for magnetic breakdown coefficients comprising an additional large factor with respect to the standard results, proportional to the ratio of the Fermi energy and the cyclotron energy. Also, these coefficients show oscillating dependence on energy, as well as on the wave number of periodic potential. Both mentioned elements enable the adjustment of the preferred wave vector of possible magnetic breakdown induced density wave instability at the highest possible critical temperature
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On the semiclassical description of nuclear Fermi liquid drops
International Nuclear Information System (INIS)
Schuck, P.
1983-11-01
In this series of lectures we aimed at presenting a self-contained semiclassical theory entirely based on the extended Thomas-Fermi or Wigner-Kirkwood h expansion in phase space. We saw that not only the Wigner transform of the single particle density matrix can be understood and very accurately represented in this way but that also generalisations to correlation functions are straightforward. First, we demonstrated a generalisation to superfluid nuclei and to superfluid nuclei in slow rotation. The latter involves already the (static) particle-hole correlation function and we saw how e.g. the reduction of the moment of inertia by roughly a factor of two could be explained very easily in an analytic way. We very clearly pointed out the necessity to treat particles (holes) individually in Thomas Fermi approximation. A further very promising result is that the linear response function for transferred momenta q>0.6 fm -1 can be very accurately represented in our p-h-Thomas Fermi approach. In the last paragraph we give somewhat speculative arguments that say the 2 + states of quasi macroscopic Fermi Liquid Drops could be well calculated in expanding the time dependent density matrix on a set of coherent states and a simple example for nearly harmonic potentials is given
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Prediction of Fermi-Surface Pressure Dependence in Rb and Cs
DEFF Research Database (Denmark)
Jan, J. P.; MacDonald, A. H.; Skriver, Hans Lomholt
1980-01-01
The linear muffin-tin orbitals method of band-structure calculation, combined with a Gaussian integration technique using special directions in the Brillouin zone, has been used to calculate Fermi radii and extremal cross-sectional areas of the Fermi surface in rubidium and cesium. Band shifts we......-surface pressure dependence agree with the limited experimental data available....
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The School Website: Facilitating Communication Engagement and Learning
Taddeo, Carmel; Barnes, Alan
2016-01-01
School websites are providing education settings with the opportunity to transform and enhance the schooling experience. However, the perceived importance of school websites and the resources invested in developing and maintaining them varies considerably across settings. There is a need to better understand what constitutes an effective website…
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On Domain Registries and Website Content
DEFF Research Database (Denmark)
Schwemer, Sebastian Felix
2018-01-01
such as Internet access service providers, hosting platforms, and websites that link to content. This article shows that in recent years, however, that the (secondary) liability of domain registries and registrars, and more specifically country code top-level domain registries (ccTLDs) for website content, has...... been tested in several EU Member States. The article investigates tendencies in the national lower-court jurisprudence and explores to what extent the liability exemption regime of the E-Commerce Directive applies to domain registries. The analysis concludes that whereas domain registries fall under...
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Analisis Faktor Kredibilitas Website E-Commerce Indonesia Studi pada Online Purchasing
Directory of Open Access Journals (Sweden)
Muhammad Cordiaz
2016-01-01
Full Text Available In the number of Internet users in Indonesia continues to increase. Internet increasingly being used for purchasing online. There are many e-commerce websites that offer goods and services online. Internet users should be able to distinguish which websites are credible before engaging in electronic commerce activities. Be an interesting question, what factors are rated by visitors of a website as an e-commerce website that is credible or reliable. Using a web-based survey methods, respondents were asked what factors support the credibility of the website in electronic commerce purchasing transactions. The respondents were Internet users. Proposed survey questions are grouped into four factors, namely, kerpercayaan factors, factors expertise, sponsorship factors and specific factors. The survey results were tested with descriptive statistic. Based on the data obtained, the Trust Factor respondents prefer e-commerce website that is trusted by his close associates, while the respondents assess the Skill Factor of websites that apply when payments online transactions through banks Indonesia is considered more reliable. In the Sponsorship Factor and Specific Factor, respondents believe the e-commerce website that does television ads in the media and managed by official institutions. Keywords : credibility, trustworthiness, expertise, electronic commerce, online purchasing
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Plain Language to Communicate Physical Activity Information: A Website Content Analysis.
Paige, Samantha R; Black, David R; Mattson, Marifran; Coster, Daniel C; Stellefson, Michael
2018-04-01
Plain language techniques are health literacy universal precautions intended to enhance health care system navigation and health outcomes. Physical activity (PA) is a popular topic on the Internet, yet it is unknown if information is communicated in plain language. This study examined how plain language techniques are included in PA websites, and if the use of plain language techniques varies according to search procedures (keyword, search engine) and website host source (government, commercial, educational/organizational). Three keywords ("physical activity," "fitness," and "exercise") were independently entered into three search engines (Google, Bing, and Yahoo) to locate a nonprobability sample of websites ( N = 61). Fourteen plain language techniques were coded within each website to examine content formatting, clarity and conciseness, and multimedia use. Approximately half ( M = 6.59; SD = 1.68) of the plain language techniques were included in each website. Keyword physical activity resulted in websites with fewer clear and concise plain language techniques ( p websites with more clear and concise techniques ( p language techniques did not vary by search engine or the website host source. Accessing PA information that is easy to understand and behaviorally oriented may remain a challenge for users. Transdisciplinary collaborations are needed to optimize plain language techniques while communicating online PA information.
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Diatomic molecules in ultracold Fermi gases - Novel composite bosons
Petrov, D. S.; Salomon, C.; Shlyapnikov, G. V.
2005-01-01
We give a brief overview of recent studies of weakly bound homonuclear molecules in ultracold two-component Fermi gases. It is emphasized that they represent novel composite bosons, which exhibit features of Fermi statistics at short intermolecular distances. In particular, Pauli exclusion principle for identical fermionic atoms provides a strong suppression of collisional relaxation of such molecules into deep bound states. We then analyze heteronuclear molecules which are expected to be for...
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Coulomb sum rules in the relativistic Fermi gas model
International Nuclear Information System (INIS)
Do Dang, G.; L'Huillier, M.; Nguyen Giai, Van.
1986-11-01
Coulomb sum rules are studied in the framework of the Fermi gas model. A distinction is made between mathematical and observable sum rules. Differences between non-relativistic and relativistic Fermi gas predictions are stressed. A method to deduce a Coulomb response function from the longitudinal response is proposed and tested numerically. This method is applied to the 40 Ca data to obtain the experimental Coulomb sum rule as a function of momentum transfer
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Evaluating mobile centric information access and interaction compatibility for learning websites
CSIR Research Space (South Africa)
Chipangura, B
2013-11-01
Full Text Available guidelines for One web design, not all websites meet these standards. Research has shown that accessing websites that were designed for desktop computer access on mobile hand held devices results in negative user experience [12]. The reasons... to identify mobile phone accessibility problems of university websites [14, 18]. At organizational level, many universities are struggling with adapting their current desktop-based websites to be accessible on mobile devices [20]. A number...
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Evaluating asthma websites using the Brief DISCERN instrument
Directory of Open Access Journals (Sweden)
Banasiak NC
2017-06-01
Full Text Available Nancy Cantey Banasiak,1 Mikki Meadows-Oliver2 1Pediatric Nurse Practitioner Specialty, Yale University School of Nursing, New Haven, CT, USA; 2University of Connecticut School of Nursing, Storrs, CT, USA Purpose: The primary purpose of this study was to examine the quality of sponsored and unsponsored asthma websites using the Brief DISCERN instrument and to evaluate whether the Health On the Net Code of Conduct (HONcode logo was present, thereby indicating that the site met the criteria. The Internet is an important source of health information for patients and their families. The primary purpose of this study was to examine the quality of sponsored and unsupported asthma websites. A secondary aim was to determine the readability and reading ease of the materials for each website along with the grade level. Methods: We queried seven Internet search engines using the keyword “asthma.” The websites were evaluated using the six-item Brief DISCERN instrument and by ascertaining whether the HONcode quality label was present. The websites were also evaluated for readability employing Flesch-Kincaid grade level and Flesch reading ease tools using Microsoft Office Word 2013 software. Results: A total of 22 unique websites were included in the study. Approximately 68% of the websites reviewed had a Brief DISCERN cutoff score of ≥16. The overall Brief DISCERN scores ranged from 6 to 30, and the mean score was 17.32 (SD =6.71. The Flesch-Kincaid grade level scores ranged from 2.9 to 15.4, and the average reading grade score was 9.49 (SD =2.7. The Flesch reading ease scores ranged from 17 to 82.7, with a mean reading ease score of 53.57 (SD =15.03. Sites with a HONcode quality label had significantly higher Brief DISCERN scores than those without one (t=2.3795; df=20; p=0.02. Conclusion: Brief DISCERN scores revealed that there is quality asthma information for children and their families available on the Internet. The grade level ranged between 2
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Developing and design a website for mc kalla oy
Bekele, Henok
2013-01-01
This bachelor thesis is about Website development and design. I have a chance to work with Mc kalla Oy. Mc kalla Oy is a construction company from Kempele which was founded 2011. They have projects in Central-Finland, through Northern Finland to Lapland. This thesis is to develop and design a new website to Mc kalla Oy. Wordpress is used to develop the new website. For the development process I use school server (.opiskelijaprojektit.net). The Thesis contains two main parts designing the ...
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Measuring the Quality of the Website User Experience
Sauro, Jeff
2016-01-01
Consumers spend an increasing amount of time and money online finding information, completing tasks, or making purchases. The quality of the website experience has become a key differentiator for organizations--affecting whether they purchase and their likelihood to return and recommend a website to friends. Two instruments were created to more…
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Tenenbaum, L. F.; Shaftel, H.; Jackson, R.
2014-12-01
There is no such thing as a non-scientist, but there are some who have yet to acknowledge their inner science spark. Aiming to ignite and fan the flame of curiosity, promote dialogue and attempt to make climate science personal and relevant to everyday life, NASA's Global Climate Change website http://climate.nasa.gov/ and Earth Right Now campaign http://www.nasa.gov/content/earth-right-now/ partnered together this year to launch the Earth Right Now blog http://climate.nasa.gov/blog. It quickly became one of the most popular blogs in all of NASA social media, receiving thousands of likes per week, and frequent comments as well as thoughtful and respectful discussions about climate change. Social media platforms such as blogs have become popular vehicles for engaging large swaths of the public in new exciting ways. NASA's Earth Right Now blog has become a powerful platform for engaging both scientists and the science-curious in constructive, fruitful conversations about the complex topic of climate science. We continue to interact and have ongoing dialogue with our readers by making the scientific content both accessible and engaging for diverse populations.
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Examining E-Loyalty in a Sexual Health Website: Cross-Sectional Study.
Nunn, Alexandra; Crutzen, Rik; Haag, Devon; Chabot, Cathy; Carson, Anna; Ogilvie, Gina; Shoveller, Jean; Gilbert, Mark
2017-11-02
Web-based sexual health resources are typically evaluated in terms of their efficacy. Information is lacking about how sexual health promotion websites are perceived and used. It is essential to understand website use to address challenges with adherence and attrition to Web-based health interventions. An existing theoretical framework for examining loyalty to electronic health (eHealth) interventions has been not yet been applied in the context of sexual health promotion nor has the association between e-loyalty and intended intervention efficacy outcomes been investigated. The objectives of this study were to investigate users' loyalty toward a sexual health website (ie, e-loyalty), measure user perceptions of the website, and measure the association between e-loyalty and perceived knowledge increase and intent to change behavior. Over 4 months, website users (clients and health care providers) participated in an open, online, cross-sectional survey about their user experiences that measured e-loyalty, user perceptions, and intended website efficacy outcomes. Relationships between user perceptions and e-loyalty were investigated using structural equation modeling (SEM). Associations between e-loyalty and website efficacy outcomes were tested using Spearman rank correlation. A total of 173 participants completed user perception questions and were included in the analysis. E-loyalty was high for both clients and providers and was significantly correlated with clients' perceived knowledge increase (ρ(171)=.30, Ployalty. Finding the website "easy to understand" was significantly related to active trust (ie, participants' willingness to act upon information presented on the website). E-loyalty may be related to the efficacy of the selected website in improving one's sexual health and was significantly associated with all three intended knowledge and behavioral outcomes. To increase e-loyalty, trustworthiness and active trust are important user perceptions to
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Evaluation of Interactive Website Design Indicators for e-Entrepreneurship
Directory of Open Access Journals (Sweden)
Chih-Chao Chung
2016-04-01
Full Text Available Using an analytic network process (ANP as an analytical tool, this study aims to construct an ANP evaluation model of interactive website design indicators. Through a review of the literature, interactive website design of e-entrepreneurship is generalized to the following dimensions: (1 Design; (2 Checking; (3 Service; (4 Interactive; and (5 Promotion, including 19 design indicators. The research is conducted for a case company. According to the findings, the model helps the case company review its current execution of interactive website design indicators and the experts’ opinions of the importance of interactive website design indicators. In addition, by comprehensive comparison, it confirms key design indicators and analyzes the managerial implications to help the case company set up precise strategic planning and resource distribution to enhance corporate operational performance and competitiveness.
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Website Vulnerability Scanning Custom Reports
US Agency for International Development — CISO is implementing an automated solution that will provide actionable reports to the owners of USAIDfunded websites. The solution will automate creation and...
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Quality assessment of websites providing educational content for patients with rheumatoid arthritis.
Siddhanamatha, Harish Rajashekarappa; Heung, Eric; Lopez-Olivo, Maria de Los Angeles; Abdel-Wahab, Noha; Ojeda-Prias, Ana; Willcockson, Irmgard; Leong, Amye; Suarez-Almazor, Maria Eugenia
2017-06-01
We performed an environmental scan of currently available websites providing educational information about rheumatoid arthritis (RA) and evaluated the quality of these websites. We searched three separate search engines, Google, Bing, and Ask.com, on August 27, 2015, using two search terms, "arthritis" and "rheumatoid." Only patient education websites were included. Two independent investigators evaluated the accuracy, completeness, technical elements, design and esthetics, readability, usability, and accessibility of the websites. The navigation experience was also evaluated by an adult training expert. We identified 46 websites. Nearly all websites (98%) provided accurate information. However, no website covered all essential RA topics. Common essential topics not covered included epidemiology, pathogenesis, treatment and disease monitoring, complications, self-management, risks and benefits of treatment, prognosis, treatment adherence, questions for patients to ask their doctors, and costs. For the technical elements, all websites disclosed their ownership, but the date that the content was last updated was mentioned in only 10 websites, ranging from 2007 to 2015. The mean reading level was grade 12.1 (standard deviation ±2.3). Most websites (78%) were easy to navigate but only 33% were friendly for people with visual and/or hearing impairments. The navigation experience was rated fair or poor in 41% of the websites. Current patient information on the Internet does not comprehensively address all educational needs of patients with RA, and is often outdated. The findings from our study highlight potential areas for improvement in online education materials for patients with RA. Copyright © 2017. Published by Elsevier Inc.
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Evaluating the effectiveness of Neuro web design model in business websites (observational study
Directory of Open Access Journals (Sweden)
Boshra Sedghi Shamir
2016-06-01
Full Text Available By combining Neuromarketing، social psychology and e-commerce، a new area has been added to the world of consumer neuroscience named Nero web design. The practical Neuro business web design model consists of 67 applicable and implementable techniques in business websites and has been gathered in three sequential phases: attraction، message delivery، and reshaping with the aim of negotiating to the visitor’s brain to increase the conversion rate on a business website. Eight websites have been implemented to evaluate the effectiveness of this model: A simple website without using the model، a complete website (using all 67 techniques in the model، and six other websites that differentiate in reshaping groups. The unique and targeted visitors for each websites obtained through internet advertisements. They became 957 new visitors altogether. In the period of two months of observational studying، Website heat maps that track the mouse movements of visitors، showed that visitors attracted to all parts of the complete website homepage particularly order form module but not so for the simple website. This reflects the success of attraction phase of the model. The results showed that the conversion rate of each of the seven model websites as compared to simple website is greatly high and even more than the international average conversion rate.
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Point Measurements of Fermi Velocities by a Time-of-Flight Method
DEFF Research Database (Denmark)
Falk, David S.; Henningsen, J. O.; Skriver, Hans Lomholt
1972-01-01
The present paper describes in detail a new method of obtaining information about the Fermi velocity of electrons in metals, point by point, along certain contours on the Fermi surface. It is based on transmission of microwaves through thin metal slabs in the presence of a static magnetic field...... applied parallel to the surface. The electrons carry the signal across the slab and arrive at the second surface with a phase delay which is measured relative to a reference signal; the velocities are derived by analyzing the magnetic field dependence of the phase delay. For silver we have in this way...... obtained one component of the velocity along half the circumference of the centrally symmetric orbit for B→∥[100]. The results are in agreement with current models for the Fermi surface. For B→∥[011], the electrons involved are not moving in a symmetry plane of the Fermi surface. In such cases one cannot...
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On the interrelation between bulk and thin-film Fermi surfaces
Schwingenschlögl, Udo
2010-12-01
A general scheme for inferring the Fermi surface of a finite slab from ab initio electronic-structure calculations for the parent bulk system is introduced. The simple cubic ReO 3 oxide is studied as an example system. We show that our scheme provides an accurate approximation of the Fermi surface even for very thin slabs. © 2010 Europhysics Letters Association.
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Band Structure and Fermi-Surface Properties of Ordered beta-Brass
DEFF Research Database (Denmark)
Skriver, Hans Lomholt; Christensen, N. E.
1973-01-01
, but that their position relative to the Fermi level is correct. The derived Fermi-surface model allows a detailed interpretation of the de Hass-van Alphen (dHvA) data. The present model has no open orbit along for B→∥ 〈110〉. This agrees with dHvA as well as magnetoresistance measurements. Four new extremal cross sections...
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Non-Fermi Liquids as Highly Active Oxygen Evolution Reaction Catalysts.
Hirai, Shigeto; Yagi, Shunsuke; Chen, Wei-Tin; Chou, Fang-Cheng; Okazaki, Noriyasu; Ohno, Tomoya; Suzuki, Hisao; Matsuda, Takeshi
2017-10-01
The oxygen evolution reaction (OER) plays a key role in emerging energy conversion technologies such as rechargeable metal-air batteries, and direct solar water splitting. Herein, a remarkably low overpotential of ≈150 mV at 10 mA cm -2 disk in alkaline solutions using one of the non-Fermi liquids, Hg 2 Ru 2 O 7 , is reported. Hg 2 Ru 2 O 7 displays a rapid increase in current density and excellent durability as an OER catalyst. This outstanding catalytic performance is realized through the coexistence of localized d-bands with the metallic state that is unique to non-Fermi liquids. The findings indicate that non-Fermi liquids could greatly improve the design of highly active OER catalysts.
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Von Weizsaecker and exchange corrections in the Thomas Fermi theory
International Nuclear Information System (INIS)
Benguria, R.D.
1979-01-01
Two corrections to the Thomas-Fermi theory of atoms are studied. First the correction for exchange, that is the effect of the Pauli principle in the interaction energy, is considered. The defining variational problem is non-convex and standard technique to prove existence of a minimizing solution do not apply. Existence and uniqueness of solutions are established by convexifying or relaxing the energy functional. Properties of the minimizing solution are studied. A second correction due to von Weizsaecker is also discussed. Finally the dual principle to the Thomas-Fermi variational problem is studied (only in the neutral case). A dual principle is suggested for the ionic case. Also, a review of recent rigorous results concerning Thomas-Fermi theory is presented
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Review of the World Bank Road Safety website.
Maas, J.M.
2006-01-01
The Road Safety website of The World Bank needs to be redeveloped. The website should reflect the new developments in the work field and the IT policy of The World Bank and support its implementation. The report is meant as a brief business case, describing the target audience, purposes of the site,
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The I-35W bridge Project Website
DEFF Research Database (Denmark)
Kampf, Constance
How can websites be used to rebuild trust? In August 2007, the Interstate Highway 35-W bridge in Minneapolis, MN collapsed during rush hour. Although many people were rescued and casualties were as limited as could be expected due to quick and effective intervention, the image of a major bridge...... collapsing during rush hour damaged the Minnesota Department of Transportation's reputation and resulted in the loss of public trust for the organization. The ensuing bridge reconstruction project included a project website intended to rebuild this trust through transparency, community involvement......, and the use of multimodal features. This paper looks at the I35-W bridge reconstruction project in Minneapolis through web-based communication by the Minnesota Department of Transportation (MnDOT) about the project. The MnDOT bridge reconstruction website will be examined using a combination of 1). Weick...
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Excited Dark Matter versus PAMELA/Fermi
Cline, James M
2010-01-01
Excitation of multicomponent dark matter in the galactic center has been proposed as the source of low-energy positrons that produce the excess 511 keV gamma rays that have been observed by INTEGRAL. Such models have also been promoted to explain excess high-energy electrons/positrons observed by the PAMELA, Fermi/LAT and H.E.S.S. experiments. We investigate whether one model can simultaneously fit all three anomalies, in addition to further constraints from inverse Compton scattering by the high-energy leptons. We find models that fit both the 511 keV and PAMELA excesses at dark matter masses M < 400 GeV, but not the Fermi lepton excess. The conflict arises because a more cuspy DM halo profile is needed to match the observed 511 keV signal than is compatible with inverse Compton constraints at larger DM masses.
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Perancangan dan Pembuatan Website E-Commerce Mulia Kencana Motor
Ericko, Stefanus; Dewi, Lily Puspa; Rostianingsih, Silvia
2015-01-01
Mulia Kencana Motor is a motorcycle repair shop. It sells spareparts which is located in Yogyakarta. Since it has opened until present, the selling-buying process is done directly, the user come to the seller, Mulia Kencana Motor, then buys the goods or either makes an order. Mulia Kencana Motor need to have an online website that could connect both parties to sell and buy via website, therefore the range area of customer will be expanded.Through website, Mulia Kencana Motor could do an onlin...
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The Fermi GBM Gamma-Ray Burst Catalog: The First Two Years
Paciesas, W.S.; Meegan, C.A.; von Kienlin, A.; Bhat, P.N.; Bissaldi, E.; Briggs, M.S.; M. Burgess, J.; Chaplin, V.; Connaughton, V.; Diehl, R.; Fishman, G.J.; Fitzpatrick, G.; Foley, S.; H. Gibby, M.; Giles, M.; Goldstein, A.; Greiner, J.; Gruber, D.; Guiriec, S.; van der Horst, A.J.; Kippen, R.M.; Kouveliotou, C.; Lichti, G.; Lin, L.; McBreen, S.; Preece, R.D.; Rau, A.; Tierney, D.; Wilson-Hodge, C.
2012-01-01
The Fermi Gamma-ray Burst Monitor (GBM) is designed to enhance the scientific return from Fermi in studying gamma-ray bursts (GRBs). In its first two years of operation GBM triggered on 491 GRBs. We summarize the criteria used for triggering and quantify the general characteristics of the triggered
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Collective molecule formation in a degenerate Fermi gas via a Feshbach resonance
International Nuclear Information System (INIS)
Javanainen, Juha; Kostrun, Marijan; Zheng Yi; Carmichael, Andrew; Shrestha, Uttam; Meinel, Patrick J.; Mackie, Matt; Dannenberg, Olavi; Suominen, Kalle-Antti
2004-01-01
We model collisionless collective conversion of a degenerate Fermi gas of atoms into bosonic molecules via a Feshbach resonance, treating the bosonic molecules as a classical field and seeding the pairing amplitudes with random phases. A dynamical instability of the Fermi sea against association with molecules drives the conversion. The model qualitatively reproduces several experimental observations [Regal et al., Nature (London) 424, 47 (2003)]. We predict that the initial temperature of the Fermi gas sets the limit for the efficiency of atom-molecule conversion
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Spontaneous symmetry breaking of Bose-Fermi mixtures in double-well potentials
International Nuclear Information System (INIS)
Adhikari, S. K.; Malomed, B. A.; Salasnich, L.; Toigo, F.
2010-01-01
We study the spontaneous symmetry breaking (SSB) of a superfluid Bose-Fermi (BF) mixture in a double-well potential (DWP). The mixture is described by the Gross-Pitaevskii equation (GPE) for the bosons, coupled to an equation for the order parameter of the Fermi superfluid, which is derived from the respective density functional in the unitarity limit (a similar model applies to the BCS regime, too). Straightforward SSB in the degenerate Fermi gas loaded into a DWP is impossible, as it requires an attractive self-interaction, and the intrinsic nonlinearity in the Fermi gas is repulsive. Nonetheless, we demonstrate that the symmetry breaking is possible in the mixture with attraction between fermions and bosons, like 40 K and 87 Rb. Numerical results are represented by dependencies of asymmetry parameters for both components on particle numbers of the mixture, N F and N B , and by phase diagrams in the (N F ,N B ) plane, which displays regions of symmetric and asymmetric ground states. The dynamical picture of the SSB, induced by a gradual transformation of the single-well potential into the DWP, is reported too. An analytical approximation is proposed for the case when the GPE for the boson wave function may be treated by means of the Thomas-Fermi (TF) approximation. Under a special linear relationship between N F and N B , the TF approximation allows us to reduce the model to a single equation for the fermionic function, which includes competing repulsive and attractive nonlinear terms. The latter one directly displays the mechanism of the generation of the effective attraction in the Fermi superfluid, mediated by the bosonic component of the mixture.
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The Woodworker's Website: A Project Management Case Study
Jance, Marsha
2014-01-01
A case study that focuses on building a website for a woodworking business is discussed. Project management and linear programming techniques can be used to determine the time required to complete the website project discussed in the case. This case can be assigned to students in an undergraduate or graduate decision modeling or management science…
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Visual Presentation and Communication of Croatian Academic Websites
Selthofer, Josipa
2018-01-01
Introduction: The aim of the research is to analyse and compare visual identity elements of Croatian academic Websites with ones of European countries using Hofstede's model of cultural dimensions. The purpose of the research is to point to the influence a culture has on the design of Websites. Method: Graphical elements of university home pages…
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Readability and quality assessment of websites related to microtia and aural atresia.
Alamoudi, Uthman; Hong, Paul
2015-02-01
Many parents and children utilize the Internet for health-related information, but the quality of these websites can vary. The objective of this study was to assess the quality and readability of microtia and aural atresia related websites. The search engine Google was queried with the terms 'microtia' and 'aural atresia.' The first 30 results were evaluated, and those websites containing original information written in English were reviewed. Quality of content was assessed with the DISCERN instrument, and readability was assessed with the Flesch-Kincaid Reading Grade Level (FKGL) and the Flesch Reading Ease Score (FRES) tests. Each website was also reviewed for ownership and the date of last update. Sixteen microtia and 14 aural atresia websites were included for full review. The mean DISCERN score for microtia websites was 54.4 (SD=8.3), and for aural atresia websites it was 47.6 (SD=10.7), which indicates 'good' and 'fair' quality of content, respectively. Readability assessments showed an average reading level requiring a grade 10 education on FKGL, and only one microtia (6.3%) and one aural atresia (7.1%) websites were deemed to be at 'reasonable' reading level on FRES. High-quality websites that are considered easily comprehensible to the general public were lacking. Since parents and children may use websites when making treatment decisions, physicians should be aware of the quality of health information pertaining to their area of expertise available on the Internet. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.
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Grant, Lenny; Hausman, Bernice L; Cashion, Margaret; Lucchesi, Nicholas; Patel, Kelsey; Roberts, Jonathan
2015-05-29
Current concerns about vaccination resistance often cite the Internet as a source of vaccine controversy. Most academic studies of vaccine resistance online use quantitative methods to describe misinformation on vaccine-skeptical websites. Findings from these studies are useful for categorizing the generic features of these websites, but they do not provide insights into why these websites successfully persuade their viewers. To date, there have been few attempts to understand, qualitatively, the persuasive features of provaccine or vaccine-skeptical websites. The purpose of this research was to examine the persuasive features of provaccine and vaccine-skeptical websites. The qualitative analysis was conducted to generate hypotheses concerning what features of these websites are persuasive to people seeking information about vaccination and vaccine-related practices. This study employed a fully qualitative case study methodology that used the anthropological method of thick description to detail and carefully review the rhetorical features of 1 provaccine government website, 1 provaccine hospital website, 1 vaccine-skeptical information website focused on general vaccine safety, and 1 vaccine-skeptical website focused on a specific vaccine. The data gathered were organized into 5 domains: website ownership, visual and textual content, user experience, hyperlinking, and social interactivity. The study found that the 2 provaccine websites analyzed functioned as encyclopedias of vaccine information. Both of the websites had relatively small digital ecologies because they only linked to government websites or websites that endorsed vaccination and evidence-based medicine. Neither of these websites offered visitors interactive features or made extensive use of the affordances of Web 2.0. The study also found that the 2 vaccine-skeptical websites had larger digital ecologies because they linked to a variety of vaccine-related websites, including government websites. They
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The producers of civic websites for young people in the Netherlands
Hirzalla, F.
2008-01-01
The aim of CivicWeb work package 7 is to investigate the organisational properties of (civic) youth websites, and to assess how the producers of these websites conceptualise their work and audiences. In the Netherlands, we conducted interviews with the producers of twelve websites to investigate
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Website applications in urbanism and architecture
Directory of Open Access Journals (Sweden)
Furundžić Danilo S.
2003-01-01
Full Text Available In the context of rapid technology development, followed by Internet spreading worldwide, the amount of information related to urbanism and architecture has remarkably increased. This paper lists a website selection with the aim to present the state of Internet based information sources on urbanism and architecture. The idea is to help colleagues cope with numerous available on-line contents. The websites are, according to their contents, classified into following categories: associations and institutions, international documents, urban planning and design, information and communication technologies in urbanism, on-line available magazines and books, civic networks, architectural design, famous architects and best examples.
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Where Was Everybody? Olaf Stapledon and the Fermi Paradox
Baxter, S.
In 1948 Olaf Stapledon gave an address to the BIS in which he summarised his vision of mankind's cosmic future: `One can imagine some sort of cosmical community of worlds ...' One might ask, however, since the universe is vastly older than mankind, why races on other worlds have not already built such a community. This is a `Fermi Paradox' question. The Paradox is based on the observation that there has been time for extraterrestrial intelligence to arise and colonise the Galaxy many times over, yet we see no sign of such endeavours. In this paper Stapledon's novels are retrospectively analysed from the point of view of the Fermi Paradox. In Last and First Men (1930) humanity is forever isolated because life and mind are rare in the Galaxy, and interstellar distances are too large ever to be traversed. These are classic candidate Fermi `solutions'. The `solution' implicit in Star Maker (1937) might be criticised in that it posits that humanity lives at a special epoch, with the cosmically transforming development of interstellar travel occurring a `mere' ten billion years after mankind, in a universe supposedly ~200bn years old. Stapledon died in 1950, the year the Paradox was formulated, and was probably unaware of the Paradox. However to apply retrospectively Fermi thinking to Stapledon's cosmologies is to gain a new insight into the author's philosophy.
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Constraining decaying dark matter with Fermi LAT gamma-rays
International Nuclear Information System (INIS)
Zhang, Le; Sigl, Günter; Weniger, Christoph; Maccione, Luca; Redondo, Javier
2010-01-01
High energy electrons and positrons from decaying dark matter can produce a significant flux of gamma rays by inverse Compton off low energy photons in the interstellar radiation field. This possibility is inevitably related with the dark matter interpretation of the observed PAMELA and FERMI excesses. The aim of this paper is providing a simple and universal method to constrain dark matter models which produce electrons and positrons in their decay by using the Fermi LAT gamma-ray observations in the energy range between 0.5 GeV and 300 GeV. We provide a set of universal response functions that, once convolved with a specific dark matter model produce the desired constraints. Our response functions contain all the astrophysical inputs such as the electron propagation in the galaxy, the dark matter profile, the gamma-ray fluxes of known origin, and the Fermi LAT data. We study the uncertainties in the determination of the response functions and apply them to place constraints on some specific dark matter decay models that can well fit the positron and electron fluxes observed by PAMELA and Fermi LAT. To this end we also take into account prompt radiation from the dark matter decay. We find that with the available data decaying dark matter cannot be excluded as source of the PAMELA positron excess
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The Travel Agency Website – Factor for Business Success
Directory of Open Access Journals (Sweden)
Băltescu Codruța Adina
2017-01-01
Full Text Available E-commerce is a constant of contemporary life. The online purchase of tourist products is a complex and delicate process, and in this respect, the website has a decisive role. The way the website is designed, the information provided and the functional characteristics can make a difference between an ordinary and a successful travel agency. This article provides an analysis of the websites of the best known travel agencies in Brașov County. The evaluation highlight that, in terms of product, non-product and reservation features, the analyzed websites meet the desired characteristics. But as concerning payment, functionality and customer relationship management features, these elements are poorly highlighted. This assessment suggests the preference of travel agencies to address to local inhabitants, thus demonstrating their propensity on the outgoing component of the intermediary activities they carry out.
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Analysis of the accessibility in websites of Ecuadorian universities of excellence
Directory of Open Access Journals (Sweden)
Tania Acosta
2017-02-01
Full Text Available Since the publication of the Ecuadorian Technical Standard NTE INEN ISO / IEC 40500 in 2014 and the Ecuadorian Technical Regulation RTE INEN 288 "The web contents accessibility" in 2016, web accessibility in Ecuador has taken great importance. In the educational field, the websites of Higher Education Institutions (HEI have become a communication channel, where universities publish the information and services they offer. In addition, HEI must satisfy the rights of all citizens to have access to education, which includes persons with disabilities. In order to ensure access to the websites of HEI to all people it is important that HEI incorporate web accessibility as an essential requirement in their websites. The objective of this research is to perform the accessibility analysis of the websites of the Ecuadorian universities of excellence belonging to categories A, B and C; identify websites accessibility errors and to present some recommendations for a better fulfillment of the WCAG 2.0 accessibility guidelines by website designers and developers.
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Theoretical Interpretation of Pass 8 Fermi-LAT e + + e - Data
Di Mauro, M.; Manconi, S.; Vittino, A.; Donato, F.; Fornengo, N.; Baldini, L.; Bonino, R.; Di Lalla, N.; Latronico, L.; Maldera, S.; Manfreda, A.; Negro, M.; Pesce-Rollins, M.; Sgrò, C.; Spada, F.
2017-08-01
The flux of positrons and electrons (e + + e -) has been measured by the Fermi Large Area Telescope (LAT) in the energy range between 7 GeV and 2 TeV. We discuss a number of interpretations of Pass 8 Fermi-LAT e + + e - spectrum, combining electron and positron emission from supernova remnants (SNRs) and pulsar wind nebulae (PWNe), or produced by the collision of cosmic rays (CRs) with the interstellar medium. We find that the Fermi-LAT spectrum is compatible with the sum of electrons from a smooth SNR population, positrons from cataloged PWNe, and a secondary component. If we include in our analysis constraints from the AMS-02 positron spectrum, we obtain a slightly worse fit to the e + + e - Fermi-LAT spectrum, depending on the propagation model. As an additional scenario, we replace the smooth SNR component within 0.7 kpc with the individual sources found in Green’s catalog of Galactic SNRs. We find that separate consideration of far and near sources helps to reproduce the e + + e - Fermi-LAT spectrum. However, we show that the fit degrades when the radio constraints on the positron emission from Vela SNR (which is the main contributor at high energies) are taken into account. We find that a break in the power-law injection spectrum at about 100 GeV can also reproduce the measured e + + e - spectrum and, among the CR propagation models that we consider, no reasonable break of the power-law dependence of the diffusion coefficient can modify the electron flux enough to reproduce the observed shape.
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A Route to Dirac Liquid Theory: A Fermi Liquid Description for Dirac Materials
Gochan, Matthew; Bedell, Kevin
Since the pioneering work developed by L.V. Landau sixty years ago, Fermi Liquid Theory has seen great success in describing interacting Fermi systems. While much interest has been generated over the study of non-Fermi Liquid systems, Fermi Liquid theory serves as a formidable model for many systems and offers a rich amount of of results and insight. The recent classification of Dirac Materials, and the lack of a unifying theoretical framework for them, has motivated our study. Dirac materials are a versatile class of materials in which an abundance of unique physical phenomena can be observed. Such materials are found in all dimensions, with the shared property that their low-energy fermionic excitations behave as massless Dirac fermions and are therefore governed by the Dirac equation. The most popular Dirac material, graphene, is the focus of this work. We present our Fermi Liquid description of Graphene. We find many interesting results, specifically in the transport and dynamics of the system. Additionally, we expand on previous work regarding the Virial Theorem and its impact on the Fermi Liquid parameters in graphene. Finally, we remark on viscoelasticity of Dirac Materials and other unusual results that are consequences of AdS-CFT.
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Relativistic density matrix in the diagonal momentum representation. Fermi-gas
International Nuclear Information System (INIS)
Makhlin, A.N.; Sinyukov, Yu.M.
1984-01-01
The relativistically invariant theory of ideal Fermi-gas is built in the framework of the quantum field theory. The average occupation numbers and correlation functions of statistical systems are found on the equal-time surfaces of arbitrary inertial frames. The effects of anisotropy in their behaviour are pointed out. The partition function method is developed to calculate the thermodynamic quantities of Fermi-gases moving as a whole
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The impact of Craigslist’s entry on competing employment websites
Directory of Open Access Journals (Sweden)
Vera Brenčič
2016-06-01
Full Text Available Abstract Craigslist, a website that hosts job- and help-wanted ads, expanded rapidly across the states in the USA over a very short period of time, thereby changing abruptly the market structure faced by competing employment websites. We exploit this abrupt change to evaluate its impact on competing websites’ online traffic and pricing. We find that Craigslist’s entry was associated with a decrease in the number of visitors that an average competing employment website attracted and with a decrease in the number of pages an average visitor reviewed during a typical visit. We also find that employment websites lowered some of the fees they charged their users. Overall, these findings offer one explanation for why Craigslist, despite its popularity, had little effect on the unemployment rate in the labor markets it entered: the entry of Craigslist cannibalized online traffic at competing employment websites. JEL Classification: J20, L10, L86
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Pairing and condensation in a resonant Bose-Fermi mixture
International Nuclear Information System (INIS)
Fratini, Elisa; Pieri, Pierbiagio
2010-01-01
We study by diagrammatic means a Bose-Fermi mixture, with boson-fermion coupling tuned by a Fano-Feshbach resonance. For increasing coupling, the growing boson-fermion pairing correlations progressively reduce the boson condensation temperature and make it eventually vanish at a critical coupling. Such quantum critical point depends very weakly on the population imbalance and, for vanishing boson densities, coincides with that found for the polaron-molecule transition in a strongly imbalanced Fermi gas, thus bridging two quite distinct physical systems.
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Websites in brand communication: interactivity and cross-media effects
Voorveld, H.A.M.
2010-01-01
This dissertation gives insight into two elements that are critical for expanding our understanding of the websites of brands. The first element represents the key characteristic of websites: interactivity. The dissertation investigates two forms of interactivity: actual and perceived interactivity.
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Critical temperature of Bose-Einstein condensation in trapped atomic Bose-Fermi mixtures
Energy Technology Data Exchange (ETDEWEB)
Albus, A P [Institut fuer Physik, Universitaet Potsdam, D-14469 Potsdam (Germany); Giorgini, S [Dipartimento di Fisica, Universita di Trento, and Istituto Nazionale per la Fisica della Materia, I-38050 Povo (Italy); Illuminati, F [Dipartimento di Fisica, Universita di Salerno, and Istituto Nazionale per la Fisica della Materia, I-84081 Baronissi (Italy); Viverit, L [Dipartimento di Fisica, Universita di Trento, and Istituto Nazionale per la Fisica della Materia, I-38050 Povo (Italy)
2002-12-14
We calculate the shift in the critical temperature of Bose-Einstein condensation for a dilute Bose-Fermi mixture confined by a harmonic potential, to lowest order in both the Bose-Bose and Bose-Fermi coupling constants. The relative importance of the effect on the critical temperature of the boson-boson and boson-fermion interactions is investigated as a function of the parameters of the mixture. The possible relevance of the shift of the transition temperature in current experiments on trapped Bose-Fermi mixtures is discussed. (letter to the editor)
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Critical temperature of Bose-Einstein condensation in trapped atomic Bose-Fermi mixtures
International Nuclear Information System (INIS)
Albus, A P; Giorgini, S; Illuminati, F; Viverit, L
2002-01-01
We calculate the shift in the critical temperature of Bose-Einstein condensation for a dilute Bose-Fermi mixture confined by a harmonic potential, to lowest order in both the Bose-Bose and Bose-Fermi coupling constants. The relative importance of the effect on the critical temperature of the boson-boson and boson-fermion interactions is investigated as a function of the parameters of the mixture. The possible relevance of the shift of the transition temperature in current experiments on trapped Bose-Fermi mixtures is discussed. (letter to the editor)
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Patient-targeted websites on overactive bladder: What are our patients reading?
Clancy, Aisling A; Hickling, Duane; Didomizio, Laura; Sanaee, May; Shehata, Fady; Zee, Rebekah; Khalil, Hisham
2018-02-01
Patients often turn to the Internet for information on medical conditions. We sought to evaluate the quality and readability of highly visible websites on overactive bladder (OAB). A survey of 42 consecutive patients attending outpatient urogynecology clinics was performed to identify the most commonly used Internet search engines and search terms for information on OAB. The three most commonly used search engines (Google, Bing, and Yahoo!) were then queried using the three most commonly used search terms. The first 20 relevant websites from each search were reviewed. After excluding duplicates, 35 websites were analyzed. Website quality of information on OAB was evaluated using the DISCERN score, JAMA benchmark criteria, and Health on the Net code (HONcode) accreditation status. Readability was assessed using the Simplified Measure of Gobbledygook (SMOG) and Dale-Chall indices. Websites were classified as advertisement/commercial (31%), health portal (29%), professional (26%), patient group (6%), and other (9%). The overall mean DISCERN score was 44 ± 18 (maximum possible score of 80). Three websites (9%) met all four JAMA benchmark criteria. Seventeen percent of websites provided adequate information on content authorship and contributions. Median SMOG and Dale-Chall indices were 9.9 (IQR 9.3-11.2) and 9.0 (IQR 8.1-9.4), respectively. Nine websites (26%) were HONcode certified. Popular websites on OAB are of low quality, written for a high school to college-level readership, and often lack adequate information to assess the potential for commercial bias. Patients should be cautioned that incomplete and potentially biased information on OAB is prevalent online. © 2017 Wiley Periodicals, Inc.
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Parental Evaluation of a Nurse Practitioner-Developed Pediatric Neurosurgery Website.
Vogel, Tina Kovacs; Kleib, Manal; Davidson, Sandra J; Scott, Shannon D
2016-04-12
Parents often turn to the Internet to seek health information about their child's diagnosis and condition. Information, support, and resources regarding pediatric neurosurgery are scarce, hard to find, and difficult to comprehend. To address this gap, a pediatric nurse practitioner designed a website called the Neurosurgery Kids Fund (NKF). Analyzing the legitimacy of the NKF website for parents seeking health information and fulfilling their social and resource needs is critical to the website's future development and success. To explore parental usage of the NKF website, track visitor behavior, evaluate usability and design, establish ways to improve user experience, and identify ways to redesign the website. The aim of this study was to assess and evaluate whether a custom-designed health website could meet parents' health information, support, and resource needs. A multimethod approach was used. Google Analytic usage reports were collected and analyzed for the period of April 23, 2013, to November 30, 2013. Fifty-two online questionnaires that targeted the website's usability were collected between June 18, 2014, and July 30, 2014. Finally, a focus group was conducted on August 20, 2014, to explore parents' perceptions and user experiences. Findings were analyzed using an inductive content analysis approach. There were a total of 2998 sessions and 8818 page views, with 2.94 pages viewed per session, a 56.20% bounce rate, an average session duration of 2 minutes 24 seconds, and a 56.24% new sessions rate. Results from 52 eligible surveys included that the majority of NKF users were Caucasian (90%), females (92%), aged 36-45 years (48%), with a university or college degree or diploma (69%). Half plan to use the health information. Over half reported turning to the Internet for health information and spending 2 to 4 hours a day online. The most common reasons for using the NKF website were to (1) gather information about the 2 summer camps, (2) explore the Media
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Hydrodynamic flows of non-Fermi liquids: Magnetotransport and bilayer drag
Patel, Aavishkar A.; Davison, Richard A.; Levchenko, Alex
2017-11-01
We consider a hydrodynamic description of transport for generic two-dimensional electron systems that lack Galilean invariance and do not fall into the category of Fermi liquids. We study magnetoresistance and show that it is governed only by the electronic viscosity provided that the wavelength of the underlying disorder potential is large compared to the microscopic equilibration length. We also derive the Coulomb drag transresistance for double-layer non-Fermi-liquid systems in the hydrodynamic regime. As an example, we consider frictional drag between two quantum Hall states with half-filled lowest Landau levels, each described by a Fermi surface of composite fermions coupled to a U (1 ) gauge field. We contrast our results to prior calculations of drag of Chern-Simons composite particles and place our findings in the context of available experimental data.
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Trust in health information websites: A systematic literature review on the antecedents of trust.
Kim, Yeolib
2016-06-01
Health websites are important sources of information for consumers. In choosing websites, trust in websites largely determines which website to access and how to best utilize the information. Thus, it is critical to understand why consumers trust certain websites and distrust others. A systematic literature review was conducted with the goal of identifying the antecedents of trust in health information websites. After four rounds of screening process, 20 articles between 2000 and 2013 were harvested. Factors that determine trust are classified into individual difference antecedents, website-related antecedents, and consumer-to-website interaction-related antecedents. The most frequently studied antecedents were socio-demographics, information quality, appearance, and perceived reputation of the website. Each antecedent of trust are discussed in detail and future research directions are proposed. © The Author(s) 2014.
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Dark Matter Searches with the Fermi Large Area Telescope
International Nuclear Information System (INIS)
Meurer, Christine
2008-01-01
The Fermi Gamma-Ray Space Telescope, successfully launched on June 11th, 2008, is the next generation satellite experiment for high-energy gamma-ray astronomy. The main instrument, the Fermi Large Area Telescope (LAT), with a wide field of view (>2 sr), a large effective area (>8000 cm 2 at 1 GeV), sub-arcminute source localization, a large energy range (20 MeV-300 GeV) and a good energy resolution (close to 8% at 1 GeV), has excellent potential to either discover or to constrain a Dark Matter signal. The Fermi LAT team pursues complementary searches for signatures of particle Dark Matter in different search regions such as the galactic center, galactic satellites and subhalos, the milky way halo, extragalactic regions as well as the search for spectral lines. In these proceedings we examine the potential of the LAT to detect gamma-rays coming from Weakly Interacting Massive Particle annihilations in these regions with special focus on the galactic center region.
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Quality of Public Hospitals Websites: A Cross-Sectional Analytical Study in Iran.
Salarvand, Shahin; Samadbeik, Mahnaz; Tarrahi, Mohammad Javad; Salarvand, Hamed
2016-04-01
Nowadays, hospitals have turned increasingly towards the Internet and develop their own web presence. Hospital Websites could be operating as effective web resources of information and interactive communication mediums to enhance hospital services to the public. Therefore, the aim of this study was to assess the quality of websites in Tehran's public hospitals. This cross-sectional analysis involved all public hospitals in Iran's capital city, Tehran, with a working website or subsites between April and June, 2014 (N=59). The websites were evaluated using three validated instruments: a localized checklist, Google page rank, and the Alexa traffic ranking. The mentioned checklist consisted of 112 items divided into five sections: technical characteristics, hospital information and facilities, medical services, interactive on-line services and external activities. Data were analyzed using descriptive and analytical statistics. The mean website evaluation score was 45.7 out of 224 for selected public hospitals. All the studied websites were in the weak category based on the earned quality scores. There was no statistically significant association between the website evaluation score with Google page rank (P=0.092), Alexa global traffic rank and Alexa traffic rank in Iran (P>0.05). The hospital websites had a lower quality score in the interactive online services and external activities criteria in comparing to other criteria. Due to the low quality level of the studied websites and the importance of hospital portals in providing information and services on the Internet, the authorities should do precise planning for the appreciable improvement in the quality of hospital websites.
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First order and second order fermi acceleration of energetic charged particles by shock waves
International Nuclear Information System (INIS)
Webb, G.M.
1983-01-01
Steady state solutions of the cosmic ray transport equation describing first order Fermi acceleration of energetic charged particles at a plane shock (without losses) and second order Fermi acceleration in the downstream region of the shock are derived. The solutions for the isotropic part of the phase space distribution function are expressible as eigenfunction expansions, being superpositions of series of power law momentum spectra, with the power law indices being the roots of an eigenvalue equation. The above exact analytic solutions are for the case where the spatial diffusion coefficient kappa is independent of momentum. The solutions in general depend on the shock compression ratio, the modulation parameters V 1 L/kappa 1 , V 2 L/kappa 2 (V is the plasma velocity, kappa is the energetic particle diffusion coefficient, and L a characteristic length over which second order Fermi acceleration is effective) in the upstream and downstream regions of the shock, respectively, and also on a further dimensionless parameter, zeta, characterizing second order Fermi acceleration. In the limit as zeta→0 (no second order Fermi acceleration) the power law momentum spectrum characteristic of first order Fermi acceleration (depending only on the shock compression ratio) obtained previously is recovered. Perturbation solutions for the case where second order Fermi effects are small, and for realistic diffusion coefficients (kappainfinityp/sup a/, a>0, p = particle momentum), applicable at high momenta, are also obtained
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Thomas-Fermi model of warm nuclei
International Nuclear Information System (INIS)
Buchler, J.R.; Epstein, R.I.
1980-01-01
The average nuclear level density of spherical nuclei is computed with a finite temperature Thomas-Fermi model. More than 80% of the low energy nuclear excitations can be accounted for in terms of this statistical model. The relevance for stellar collapse is discussed
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A framework for automatic information quality ranking of diabetes websites.
Belen Sağlam, Rahime; Taskaya Temizel, Tugba
2015-01-01
Objective: When searching for particular medical information on the internet the challenge lies in distinguishing the websites that are relevant to the topic, and contain accurate information. In this article, we propose a framework that automatically identifies and ranks diabetes websites according to their relevance and information quality based on the website content. Design: The proposed framework ranks diabetes websites according to their content quality, relevance and evidence based medicine. The framework combines information retrieval techniques with a lexical resource based on Sentiwordnet making it possible to work with biased and untrusted websites while, at the same time, ensuring the content relevance. Measurement: The evaluation measurements used were Pearson-correlation, true positives, false positives and accuracy. We tested the framework with a benchmark data set consisting of 55 websites with varying degrees of information quality problems. Results: The proposed framework gives good results that are comparable with the non-automated information quality measuring approaches in the literature. The correlation between the results of the proposed automated framework and ground-truth is 0.68 on an average with p < 0.001 which is greater than the other proposed automated methods in the literature (r score in average is 0.33).
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NASA's Student Launch Projects: A Government Education Program for Science and Engineering
Shepherd, Christena C.
2009-01-01
Among the many NASA education activities, the Student Launch projects are examples of how one agency has been working with students to inspire math, science and engineering interest. There are two Student Launch projects: Student Launch Initiative (SLI) for middle and high school students and the University Student Launch Initiative (USLI) for college students. The programs are described and website links are provided for further information. This document presents an example of how an agency can work with its unique resources in partnership with schools and communities to bring excitement to the classroom.
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International Nuclear Information System (INIS)
Kuznetsov, V L; Kuznetsova, L A; Rowe, D M
2003-01-01
The feasibility of improving the conversion efficiency of a thermoelectric converter by employing interfaces between materials exhibiting Fermi gas (FG) and Fermi liquid (FL) behaviour has been studied. Thermocouples consisting of a semiconductor and a strongly correlated material have been fabricated and the Peltier heat measured over the temperature range 15 deg 330 K. A number of materials possessing different types of strong electron correlation have been synthesized including the heavy fermion compound YbAl 3 , manganite La 0.7 Ca 0.3 MnO 3 and high-T c superconductor YBa 2 Cu 3 O 7δ . n- and p-Bi 2 Te 3 -based solid solutions as well as n-Bi 0.85 Sb 0.15 solid solution have also been synthesized and used as materials exhibiting FG properties. Experimental measurements of the Peltier heat were compared to the results of calculations based on preliminary measured thermoelectric properties of materials and electrical contact resistance at the interfaces. The potential of employing FG/FL interfaces in thermoelectric energy conversion is discussed
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Comprehensive Evaluation Criteria for English Learning Websites Using Expert Validity Surveys
Yang, Ya-Ting C.; Chan, Chia-Ying
2008-01-01
This study aimed to develop a set of evaluation criteria for English learning websites. These criteria can assist English teachers/web designers in designing effective websites for their English courses and can also guide English learners in screening for appropriate and reliable websites to use in increasing their English ability. To fulfill our…
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Content and technical evaluation of Type III Iranian medical universities\\' websites
Directory of Open Access Journals (Sweden)
Khadejeh Shabankareh
2016-05-01
Full Text Available Background: Besides the role that universities websites have in reflection of universities’ educational and research activities, they have also significant importance in promotion of universities’ national and international ranking in webometrics ranking of world universities and also in webometric ranking of Islamic world Science Citation and subsequently obtaining national and international credibility and gaining student and funding. So, continuous evaluation of universities websites in different aspects, especially based on considering index of these ranking systems, is important. Therefore, present study aimed to review the situation of Type 3 Iranian medical universities’ websites based on content and technical features effecting on promotion of webometric rank. Materials and Methods : Present study is a survey with descriptive approach which descriptive the present situation of Type 3 Iranian medical universities’ websites. Data were collected using a researcher-made checklist which was consisted of two parts including content criteria effecting on webometric ranking (50 criteria and technical criteria of search engines optimization (52 criteria. Content evaluation of websites was done by researcher direct referring and observing. In order to evaluation of these websites, based on technical criteria of search engines optimization, automatic tools about website evaluation were used. Data were analyzed by SPSS20. Results: The finding of this study showed that, Gonabad, Bushehr & Shahrekord universities of medical sciences have the most accommodation with the research checklist. Bam, Dezful & Jiroft universities of medical sciences have the least accommodation. According to research findings less than 50 percent of the research community, reached more than 50 percent of the criteria in checklist. Conclusion: Evaluation of studied websites indicated that whole websites are far from ideal situation. So type 3 medical universities
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Using GRB 080723B to cross-calibrate Fermi/GBM and INTEGRAL
International Nuclear Information System (INIS)
Kienlin, A. von; Briggs, M. S.; Connoughton, V.; Preece, R. D.; McBreen, S.; Sazonov, Sergey; Tsygankov, Sergey; Wilson-Hodge, C. A.
2009-01-01
On July 23, 2008 GRB 080723B, a bright GRB lasting about 105 s was detected by the INTEGRAL burst alert system. This burst was also detected by the Fermi Gamma-ray burst monitor. At this time no Fermi/GBM GCN notices were distributed to the public because Fermi was still in commissioning phase. The simultaneous detection of a bright GRB by both satellites gives us the opportunity to cross-calibrate the GBM with the already well-calibrated instruments on-board INTEGRAL, the Spectrometer SPI and the Imager IBIS. Time-resolved spectroscopy of this long and structured GRB is of special importance because Fermi was slewing during the GRB was still ongoing. In this paper we present a first and still preliminary analysis of the GBM spectra and compare them to those obtained by SPI for the same selection of time intervals. A more accurate cross-calibration will be forthcoming when the improved in-flight calibration of GBM is available and the corresponding data and responses can be reprocessed.
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Itinerant Ferromagnetism in a Polarized Two-Component Fermi Gas
DEFF Research Database (Denmark)
Massignan, Pietro; Yu, Zhenhua; Bruun, Georg
2013-01-01
We analyze when a repulsively interacting two-component Fermi gas becomes thermodynamically unstable against phase separation. We focus on the strongly polarized limit, where the free energy of the homogeneous mixture can be calculated accurately in terms of well-defined quasiparticles, the repul......We analyze when a repulsively interacting two-component Fermi gas becomes thermodynamically unstable against phase separation. We focus on the strongly polarized limit, where the free energy of the homogeneous mixture can be calculated accurately in terms of well-defined quasiparticles...
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Content and functionality of alcohol and other drug websites: results of an online survey.
Klein, Britt; White, Angela; Kavanagh, David; Shandley, Kerrie; Kay-Lambkin, Frances; Proudfoot, Judith; Drennan, Judy; Connor, Jason; Baker, Amanda; Young, Ross
2010-12-19
There is a growing trend for individuals to seek health information from online sources. Alcohol and other drug (AOD) use is a significant health problem worldwide, but access and use of AOD websites is poorly understood. To investigate content and functionality preferences for AOD and other health websites. An anonymous online survey examined general Internet and AOD-specific usage and search behaviors, valued features of AOD and health-related websites (general and interactive website features), indicators of website trustworthiness, valued AOD website tools or functions, and treatment modality preferences. Surveys were obtained from 1214 drug (n = 766) and alcohol website users (n = 448) (mean age 26.2 years, range 16-70). There were no significant differences between alcohol and drug groups on demographic variables, Internet usage, indicators of website trustworthiness, or on preferences for AOD website functionality. A robust website design/navigation, open access, and validated content provision were highly valued by both groups. While attractiveness and pictures or graphics were also valued, high-cost features (videos, animations, games) were minority preferences. Almost half of respondents in both groups were unable to readily access the information they sought. Alcohol website users placed greater importance on several AOD website tools and functions than did those accessing other drug websites: online screening tools (χ²(2) = 15.8, P user groups was an Internet site with email therapist support. Explorations of demographic differences were also performed. While gender did not affect survey responses, younger respondents were more likely to value interactive and social networking features, whereas downloading of credible information was most highly valued by older respondents. Significant deficiencies in the provision of accessible information on AOD websites were identified, an important problem since information seeking was the most common reason for
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Measuring interactivity on tobacco control websites.
Freeman, Becky; Chapman, Simon
2012-08-01
With the increased reach of Web 2.0, Internet users expect webpages to be interactive. No studies have been conducted to assess whether tobacco control-relevant sites have implemented these features. The authors conducted an analysis of an international sample of tobacco control-relevant websites to determine their level of interactivity. The sample included 68 unique websites selected from Google searches in 5 countries, on each country's Google site, using the term smoking. The 68 sites were analyzed for 10 categories of interactive tools. The most common type of interactive content found on 46 (68%) of sites was for multimedia featuring content that was not primarily text based, such as photo galleries, videos, or podcasts. Only 11 (16%) websites-outside of media sites-allowed people to interact and engage with the site owners and other users by allowing posting comments on content and/or hosting forums/discussions. Linkages to social networking sites were low: 17 pages (25%) linked to Twitter, 15 (22%) to Facebook, and 11 (16%) to YouTube. Interactivity and connectedness to online social media appears to still be in its infancy among tobacco control-relevant sites.
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Feasibility of a Smartphone website to support antenatal Perineal massage in pregnant women.
Takeuchi, Shoko; Horiuchi, Shigeko
2017-10-16
In Japan, 85% of pregnant women do not practice antenatal perineal massage. Therefore, we developed a smartphone website to support the practice of antenatal perineal massage. The purpose of the present study was to evaluate the feasibility of our smartphone website. Pregnant women were recruited at five hospitals or clinics in Tokyo, Japan. Participants assigned to the smartphone website group (n = 74) were asked to register on the smartphone website. After completing registration, they could login and use all the contents of the website. After giving birth, participants completed a 5-item questionnaire evaluating the acceptability of the smartphone website. Participants assigned to the leaflet group (n = 71) received a leaflet on antenatal perineal massage and completed a similar 4-item questionnaire evaluating the leaflet. Data were collected from April 2014 to November 2014. Data analysis was performed using chi-square and t-tests to analyze responses to close-ended questions, and content analysis was conducted to analyze responses of open-ended questions. In the smartphone website group, 9 women (12.2%) did not register on the smartphone website. Approximately 80% of the women who responded indicated that the smartphone site was easy to understand and useful for practicing antenatal perineal massage. In the smartphone website group, the reply rate for reporting the frequency of massage was 43.6%. Although the ratings and frequency at which the material was accessed tended to be higher in the smartphone website group than in the leaflet group, there were no significant differences. Most pregnant women in the smartphone website group provided a favorable evaluation for the smartphone website. However, some participants had suggestions for improvement, which need to be incorporated in a revised version of the website. Therefore, the present study's results demonstrate the feasibility of a smartphone website to support the practice of antenatal perineal
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Engaging Scientists in NASA Education and Public Outreach: Tools for Scientist Engagement
Buxner, Sanlyn; Meinke, B. K.; Hsu, B.; Shupla, C.; Grier, J. A.; E/PO Community, SMD
2014-01-01
The NASA Science Education and Public Outreach Forums support the NASA Science Mission Directorate (SMD) and its education and public outreach (E/PO) community through a coordinated effort to enhance the coherence and efficiency of SMD-funded E/PO programs. The Forums foster collaboration between scientists with content expertise and educators with pedagogy expertise. We present tools and resources to support astronomers’ engagement in E/PO efforts. Among the tools designed specifically for scientists are a series of one-page E/PO-engagement Tips and Tricks guides, a sampler of electromagnetic-spectrum-related activities, and NASA SMD Scientist Speaker’s Bureau (http://www.lpi.usra.edu/education/speaker). Scientists can also locate resources for interacting with diverse audiences through a number of online clearinghouses, including: NASA Wavelength, a digital collection of peer-reviewed Earth and space science resources for educators of all levels (http://nasawavelength.org), and EarthSpace (http://www.lpi.usra.edu/earthspace), a community website where faculty can find and share teaching resources for the undergraduate Earth and space sciences classroom. Learn more about the opportunities to become involved in E/PO and to share your science with students, educators, and the general public at http://smdepo.org.
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Student satisfaction with a Website designed for three nursing courses.
Zwolski, K
2000-01-01
The website described was not designed to replace classroom teaching, but to serve as an additional tool for students attending a traditional course. Based on my experience and the data obtained from the evaluation questionnaire, the following points can be made: students are enthusiastic about the Internet and will access a web page that accompanies a particular course or courses a website can allow for objectives, not normally engendered by traditional methods, to be achieved. These may include, for instance, fostering a sense of community, providing new means of communication between professor and student and serving as a portal to the vast resources of the Internet. A single-theme website can effectively address the learning needs of students at different levels, in this case both undergraduate and graduate students A well-designed website can increase the visibility of the educational institution that sponsors it It is not easy to measure a website's effectiveness in helping students achieve traditional course objectives or its impact on student learning. The questionnaire results confirm students' satisfaction with the website and their belief that it was an important and useful learning tool. This is significant and positive. Future research is needed to measure the degree to which a website can increase learning in a particular area. The site required about 150 hours to construct and about 6-8 hours per week to maintain. This is a considerable amount of faculty time. Although I cannot speak for others, I firmly believe that this is a worthwhile investment. The website is clearly appreciated by students, and it seems logical to conclude that it is fulfilling some learning needs that may not be met by other methods. In addition, it provides the educator with a new vehicle for communication. It is exhilarating to create with new formats and to use expertise in a given area to reach students, foster community, and establish a presence beyond the classroom
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Some notes on time dependent Thomas Fermi approximation
International Nuclear Information System (INIS)
Holzwarth, G.
1979-01-01
The successful use of effective density-dependent potentials in static Hartree-Fock calculations for nuclear ground-state properties has led to the question whether it is possible to obtain significant further simplification by approximating also the kinetic energy part of the ground state energy by a functional of the local density alone. The great advantage of such an approach is that its complexity is independent of particle number; the size of the system enters only through parameters, Z and N. The simple 'extended Thomas Fermi' functionals are based on the assumption of a spherically symmetric local Fermi surface throughout the nucleus and they represent the 'liquid drop' part of the static total energy. Given this static formalism which is solved directly for the local density without considering individual particles one might ask for a possible dynamical extension in the same sense as TDHF is a dynamical extension of the static HF approach. The aim of such a Time Dependent Thomas Fermi (TDTF) approximation would be to determine directly the time-dependent local single-particle density from given initial conditions and the single-particle current density without following each particle on its individual orbit
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NASA's Earth Observatory: 16 Years of Communicating with and for Scientists
Ward, K.; Carlowicz, M. J.; Allen, J.; Voiland, A.; Przyborski, P.; Hansen, K.; Stevens, J.
2015-12-01
For the past 16 years NASA's Earth Observatory website has featured stories that are driven by strong visualization and in-depth reporting and storytelling. The Earth Observatory Image of the Day is published 365 days a year and is a syndication staple for major news outlets, science-related publications, blogs and social media outlets. The daily publication pace requires that we cover a wide range of topics within NASA's portfolio of Earth science research. To meet our deadlines, and to do so competently and with the authority that a NASA-branded publication warrants, we have developed relationships with scientists from throughout the agency who both provide us with ideas for stories and review our content for accuracy. This symbiotic relationship insures that the Earth Observatory has a quality product that is syndicated, repurposed and sourced throughout popular media, resulting in science content reaching the public that might not otherwise be reported. We will discuss how we have developed our relationships and processes over the years, how we work with scientists to see the potential stories in their data, and how we package and promote these stories and visualizations for maximum exposure and reuse.
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Swisster – a news website for Anglophones
2008-01-01
Employees of CERN can now sign up for a free account at Swisster.ch, an English language website devoted to Swiss news and current affairs. « prev next » The website, which is aimed at English speakers in Switzerland, normally requires an annual subscription of 300 CHF, but has teamed up with sponsors to offer a free subscription for CERN employees. The service provides a daily newsletter containing the main news and other information sent to subscribers every working day. The Swisster website also offers a variety of services such as health, education and food forums called "corners", as well as weather & snow forecasts, blogs and even a TV guide for Anglophones. The editorial team of English-speaking journalists is based in Lausanne, Geneva, Zurich and Neuchatel and covers news for expatriates and English speakers living and working in Switzerland. Swisster.ch also has a Saturday morning radio show from 08:30 to 09:30, on Radio Cit�...
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New website dealing with CERN-EU relations
2005-01-01
A new website dealing with CERN-EU relations (cern.ch/EU) is being brought into production. Thanks are due to several people for their contributions, and especially to the primary authors - Piotr Kurpiel, a Technical Student, and Miguel Marquina / IT. This site is designed to help people looking for information concerning interactions between Europe and particle physics in general, and the CERN programme in particular. FACILITIES AVAILABLE TO THE PUBLIC For members of the public, links are provided to several websites of general interest and there is also a search facility to help navigation among the main sources of information on EU programmes. FACILITIES ONLY AVAILABLE TO CERN USERS Entry to the CERN area of the site requires authentication via your NICE login name and password. In this area: You can look at information about present or past EU co-funded projects at CERN. For projects with their own websites you can click through to the site to obtain more detailed information. You can subscribe to ...
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ASSESING TECHNICAL UNIVERSITIES’ WEBSITES. ROMANIA VS. BULGARIA
Directory of Open Access Journals (Sweden)
Ioana Ancuţa IANCU
2017-05-01
Full Text Available In a technology era, institutions have to be present on the World Wide Web (www, not only because of the competitiveness but also for a better presentation of their academic offers. Being a communication channel, universities’ websites must contain a series of information addressed not only to students or future students but also to the foreign students, academic staff, governmental institutions and press. While assessing Romania’s and Bulgaria’s Technical Universities’ websites, in March 2017, we searched and analyzed 104 criterion. We have grouped them into four dimensions: content, interactivity, navigation and appearance. Each criterion and dimension received a certain score (a grade for the presence / absence of a criterion using the ProfNet procedure. Of the two countries that we have analyzed (Romania and Bulgaria we have concluded, that the websites of the Romanian Universities possess a little more functionalities, gathering a score of 14.39 points (the means on all dimensions, compared to the Bulgarian ones which scored 14.25 points.
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Ground state of charged Base and Fermi fluids in strong coupling
International Nuclear Information System (INIS)
Mazighi, R.
1982-03-01
The ground state and excited states of the charged Bose gas were studied (wave function, equation of state, thermodynamics, application of Feynman theory). The ground state of the charged Fermi gas was also investigated together with the miscibility of charged Bose and Fermi gases at 0 deg K (bosons-bosons, fermions-bosons and fermions-fermions) [fr
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Stochastic modeling of the Fermi/LAT γ-ray blazar variability
Energy Technology Data Exchange (ETDEWEB)
Sobolewska, M. A.; Siemiginowska, A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Kelly, B. C. [Department of Physics, Broida Hall, University of California, Santa Barbara, CA 93107 (United States); Nalewajko, K., E-mail: malgosia@camk.edu.pl [JILA, University of Colorado and National Institute of Standards and Technology, 440 UCB, Boulder, CO 80309 (United States)
2014-05-10
We study the γ-ray variability of 13 blazars observed with the Fermi/Large Area Telescope (LAT). These blazars have the most complete light curves collected during the first four years of the Fermi sky survey. We model them with the Ornstein-Uhlenbeck (OU) process or a mixture of the OU processes. The OU process has power spectral density (PSD) proportional to 1/f {sup α} with α changing at a characteristic timescale, τ{sub 0}, from 0 (τ >> τ{sub 0}) to 2 (τ << τ{sub 0}). The PSD of the mixed OU process has two characteristic timescales and an additional intermediate region with 0 < α < 2. We show that the OU model provides a good description of the Fermi/LAT light curves of three blazars in our sample. For the first time, we constrain a characteristic γ-ray timescale of variability in two BL Lac sources, 3C 66A and PKS 2155-304 (τ{sub 0} ≅ 25 days and τ{sub 0} ≅ 43 days, respectively, in the observer's frame), which are longer than the soft X-ray timescales detected in blazars and Seyfert galaxies. We find that the mixed OU process approximates the light curves of the remaining 10 blazars better than the OU process. We derive limits on their long and short characteristic timescales, and infer that their Fermi/LAT PSD resemble power-law functions. We constrain the PSD slopes for all but one source in the sample. We find hints for sub-hour Fermi/LAT variability in four flat spectrum radio quasars. We discuss the implications of our results for theoretical models of blazar variability.
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An Evaluation and Ranking of Children's Hospital Websites in the United States.
Huerta, Timothy R; Walker, Daniel M; Ford, Eric W
2016-08-22
Children's hospitals are faced with the rising need for technological innovation. Their prospective health care consumers, who increasingly depend on the Web and social media for communication and consumer engagement, drive this need. As patients and family members navigate the Web presence of hospitals, it is important for these specialized organizations to present themselves and their services efficiently. The purpose of this study was to evaluate the website content of children's hospitals in order to identify opportunities to improve website design and create benchmarks to judge improvement. All websites associated with a children's hospital were identified using a census list of all children's hospitals in the United States. In March of 2014, each website and its social media were evaluated using a Web crawler that provided a 5-dimensional assessment that included website accessibility, marketing, content, technology, and usability. The 5-dimensional assessment was scored on a scale ranging from 0 to 10 with positive findings rated higher on the scale. Websites were ranked by individual dimensions as well as according to their average ranking across all dimensions. Mean scores of 153 websites ranged from 5.05 to 8.23 across all 5 dimensions. Results revealed that no website scored a perfect 10 on any dimension and that room exists for meaningful improvement. Study findings allow for the establishment of baseline benchmarks for tracking future website and social media improvements and display the need for enhanced Web-based consumer engagement for children's hospitals.
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Hydrodynamics in a Degenerate, Strongly Attractive Fermi Gas
Thomas, John E.; Kinast, Joseph; Hemmer, Staci; Turlapov, Andrey; O'Hara, Ken; Gehm, Mike; Granade, Stephen
2004-01-01
In summary, we use all-optical methods with evaporative cooling near a Feshbach resonance to produce a strongly interacting degenerate Fermi gas. We observe hydrodynamic behavior in the expansion dynamics. At low temperatures, collisions may not explain the expansion dynamics. We observe hydrodynamics in the trapped gas. Our observations include collisionally-damped excitation spectra at high temperature which were not discussed above. In addition, we observe weakly damped breathing modes at low temperature. The observed temperature dependence of the damping time and hydrodynamic frequency are not consistent with collisional dynamics nor with collisionless mean field interactions. These observations constitute the first evidence for superfluid hydrodynamics in a Fermi gas.
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Enhanced diphoton rates at Fermi and the LHC
International Nuclear Information System (INIS)
Schmidt-Hoberg, Kai; Staub, Florian
2012-11-01
We show that within MSSM singlet extensions the experimental hints beyond the standard model from the Fermi LAT telescope as well as from the LHC can be explained simultaneously while being consistent with all experimental constraints. In particular we present an example point which features a ∝130 GeV lightest neutralino with an annihilation cross section into photons consistent with the indication from the Fermi satellite with simultaneously the right relic abundance, a continuum photon spectrum consistent with observation, direct detection cross section below the experimental limits, electroweak observables consistent with experiment and a 125 GeV light Higgs boson with a slightly enhanced h→γγ rate.
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Enhanced diphoton rates at Fermi and the LHC
Energy Technology Data Exchange (ETDEWEB)
Schmidt-Hoberg, Kai [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Staub, Florian [Bonn Univ. (Germany). Bethe Center for Theoretical Physics und Physikalisches Inst.; Winkler, Martin Wolfgang [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
2012-11-15
We show that within MSSM singlet extensions the experimental hints beyond the standard model from the Fermi LAT telescope as well as from the LHC can be explained simultaneously while being consistent with all experimental constraints. In particular we present an example point which features a {proportional_to}130 GeV lightest neutralino with an annihilation cross section into photons consistent with the indication from the Fermi satellite with simultaneously the right relic abundance, a continuum photon spectrum consistent with observation, direct detection cross section below the experimental limits, electroweak observables consistent with experiment and a 125 GeV light Higgs boson with a slightly enhanced h{yields}{gamma}{gamma} rate.
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Fermi's ansatz and Bohm's quantum potential
Energy Technology Data Exchange (ETDEWEB)
Dennis, Glen, E-mail: gdennis502@gmail.com [TPRU, Birkbeck College, University of London, London, WC1E 7HX (United Kingdom); Gosson, Maurice A. de, E-mail: maurice.de.gosson@univie.ac.at [University of Vienna, Faculty of Mathematics, NuHAG, Oskar-Morgenstern-Platz 1, 1090 Vienna (Austria); Hiley, Basil J., E-mail: b.hiley@bbk.ac.uk [TPRU, Birkbeck College, University of London, London, WC1E 7HX (United Kingdom)
2014-06-27
In this paper we address the following simple question: Given a wavefunction ψ(x,t) in a one-dimensional configuration space, is it possible to give a unique two-dimensional representation ρ(x,p,t) in a position-momentum phase plane? If so, can we find the general condition that makes this possible? We will show that this is indeed possible by using an idea introduced originally by Fermi provided the boundary of the phase space area is a closed curve satisfying a certain exact quantum condition. - Highlights: • We review “Fermi's trick” which allows one to view an arbitrary wavefunction as a stationary state for some Hamiltonian operator H{sub F}. This Hamiltonian contains the quantum potential. • We study the relation between Fermi's trick and an exact quantization condition which reduces to the familiar EBK condition in the limit ħ→0. • This allows us to relate the Fermi set H{sub F}(x,p)=0 to the notion of quantum blob introduced by one of us in previous work. Quantum blobs are phase space regions corresponding to minimum uncertainty. • We discuss our results from the point of view of the quantum theory of motion.
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On the asymptotic behaviour of the mass operator near the Fermi energy
International Nuclear Information System (INIS)
Sartor, R.
1977-01-01
By taking due account of momentum conservation, it is shown that, when ω is near the Fermi energy ωsub(F), the imaginary part of the mass operator M(k,ω) for an infinite Fermi system behaves like (ω-ωsub(F))sup(p(k)) where the exponent p(k)>=2 depends on the interval in which mod(k) is lying. In particular, the commonly asserted quadratic behaviour (ω-ωsub(F)) 2 is shown to be true only for mod(k)<=3ksub(F). It is explicitly assumed that the Fermi system admits a perturbative type treatment. (Auth.)
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Observation of Spin Polarons in a Tunable Fermi Liquid of Ultracold Atoms
Zwierlein, Martin
2009-05-01
We have observed spin polarons, dressed spin down impurities in a spin up Fermi sea of ultracold atoms via tomographic RF spectroscopy. Feshbach resonances allow to freely tune the interactions between the two spin states involved. A single spin down atom immersed in a Fermi sea of spin up atoms can do one of two things: For strong attraction, it can form a molecule with exactly one spin up partner, but for weaker interaction it will spread its attraction and surround itself with a collection of majority atoms. This spin down atom dressed with a spin up cloud constitutes the spin- or Fermi polaron. We have observed a striking spectroscopic signature of this quasi-particle for various interaction strengths, a narrow peak in the spin down spectrum that emerges above a broad background. The spectra allow us to directly measure the polaron energy and the quasi-particle residue Z. The polarons are found to be only weakly interacting with each other, and can thus be identified with the quasi-particles of Landau's Fermi liquid theory. At a critical interaction strength, we observe a transition from spin one-half polarons to spin zero molecules. At this point the Fermi liquid undergoes a phase transition into a superfluid Bose liquid.
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The Advanced Labs Website: resources for upper-level laboratories
Torres-Isea, Ramon
2012-03-01
The Advanced Labs web resource collection is an effort to create a central, comprehensive information base for college/university faculty who teach upper-level undergraduate laboratories. The website is produced by the American Association of Physics Teachers (AAPT). It is a part of ComPADRE, the online collection of resources in physics and astronomy education, which itself is a part of the National Science Foundation-funded National Science Digital Library (NSDL). After a brief review of its history, we will discuss the current status of the website while describing the various types of resources available at the site and presenting examples of each. We will detail a step-by-step procedure for submitting resources to the website. The resource collection is designed to be a community effort and thus welcomes input and contributions from its users. We will also present plans, and will seek audience feedback, for additional website services and features. The constraints, roadblocks, and rewards of this project will also be addressed.
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Band Structure and Fermi Surface of Cu2Sb by the LMTO Method
DEFF Research Database (Denmark)
Jan, J. P.; Skriver, Hans Lomholt
1977-01-01
The linear muffin-tin orbital (LMTO) method of bandstructure calculation has been applied to the simple tetragonal compound Cu2Sb. The d bands of Cu lie substantially below the Fermi level, and the Fermi surface is a recognizable distortion of the free-electron model. The Fermi surface has sheets......-orbit splitting, and of another closed sheet. Earlier de Haas-van Alphen results are explained semiquantitatively by the model, which also accounts for open orbits seen in high-field magnetoresistance experiments....
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A Website for Astronomy Education and Outreach
Impey, C.; Danehy, A.
2017-09-01
Teach Astronomy is a free, open access website designed for formal and informal learners of astronomy. The site features: an online textbook complete with quiz questions and a glossary; over ten thousand images; a curated collection of the astronomy articles in Wikipedia; a complete video lecture course; a video Frequently Asked Questions tool; and other materials provided by content partners. Clustering algorithms and an interactive visual interface allow users to browse related content. This article reviews the features of the website and how it can be used.
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STUDI EMPIRIK SOCIAL COMMERCE (S-COMMERCE DARI SUDUT PANDANG KUALITAS WEBSITE
Directory of Open Access Journals (Sweden)
Endang Supriyati
2015-04-01
Full Text Available ABSTRAK E-commerce berevolusi dengan mengadopsi web 2.0 yang mempunyai kapabilitas meningkatkan partisipasi pelanggan dan meningkatkan nilai ekonomi. Fenomena baru ini dikenal dengan istilah social commerce (s-commerce. Kualitas website dipengaruhi tiga hal yaitu kulitas system (system quality, kualitas layanan(service quality dan kualitas informasi (information quality. Kualitas pelayanan yang baik dapat membantu pengguna mendapatkan kekuatan penuh dari website dengan cara mencocokan dengan harapan mereka. Kualitas informasi menunjukkan sejauh mana isi dari website tersebut tepat waktu (up date, akurat, dan lengkap.Penelitian ini bersifat empirik dengan menerapkan model kualitas website pada dua s-commerce yaitu tokopedia.com dan lazada.co.id. Metode yang digunakan adalah analisa sistemmatis, perbandingan dan observasi. Dari model yang diterapkan didapat hasil bahwa tokopedia memiliki lebih banyak atribut-atribut kualitas website. Kata kunci: s-commerce, kualitas web site, system, service, informasi.
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Radioactivity induced by neutrons: Enrico Fermi and a thermodynamic approach to radiative capture
De Gregorio, Alberto
2006-07-01
When Fermi learned that slow neutrons are much more effective than fast ones in inducing radioactivity, he explained this phenomenon by mentioning the well-known scattering cross section between neutrons and protons. At this early stage, he did not refer to the capture cross section by target nuclei. At the same time a thermodynamic approach to neutron-proton capture was being discussed by physicists: neutron capture was interpretated as the reverse of deuteron photodissociation and detailed balance among neutrons, protons, deuterons, and radiation was invoked. This thermodynamic approach might underlie Fermi's early explanation of the great efficiency of slow neutrons. Fermi repeatedly used a thermodynamic approach that had been used in describing some of the physical properties of conductors by Richardson and had been influential in Fermi's youth.
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Fermi surfaces of YRu2Si2 and LaRu2Si2
International Nuclear Information System (INIS)
Settai, R.; Ikezawa, H.; Toshima, H.; Takashita, M.; Ebihara, T.; Sugawara, H.; Kimura, T.; Motoki, K.; Onuki, Y.
1995-01-01
We have measured the de Haas-van Alphen effect of YRu 2 Si 2 and LaRu 2 Si 2 to clarify the Fermi surfaces and cyclotron masses. Main hole-Fermi surfaces of both compounds with a distorted ellipsoid shape are similar, occupying about half of the Brillouin zone. The small hole-Fermi surfaces with the shape of a rugby ball are three in number for LaRu 2 Si 2 , and one for YRu 2 Si 2 . An electron-Fermi surface consists of a doughnut like shape for LaRu 2 Si 2 , while a cylinder along the [001] direction and a multiply-connected shape exist for YRu 2 Si 2 . The cyclotron masses of YRu 2 Si 2 are a little larger than those of LaRu 2 Si 2 . ((orig.))
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Energy Technology Data Exchange (ETDEWEB)
Sanchez, D.
2010-06-15
The Fermi satellite was launched in June 2008. The onboard LAT detector is dedicated to the study of galactic and extra-galactic gamma sources with an energy comprised between 200 MeV and 300 GeV. 1451 sources have been detected in less than 11 months. This document is divided into 6 chapters: 1) gamma astronomy, 2) the Fermi satellite, 3) the active galactic nuclei (NAG), 4) the observation of several blazars (PKS-2155-304 and PG-1553+113) and its simulation, 5) the observation of PKS-2155-304 with both RXTE and Fermi, and 6) conclusion
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Non-Science Majors' Critical Evaluation of Websites in a Biotechnology Course
Halverson, Kristy L.; Siegel, Marcelle A.; Freyermuth, Sharyn K.
2010-12-01
Helping students develop criteria for judgment and apply examination skills is essential for promoting scientific literacy. With the increasing availability of the Internet, it is even more essential that students learn how to evaluate the science they gather from online resources. This is particularly true because publishing information on the web is not restricted to experts, and content quality can vary greatly across websites. The responsibility of evaluating websites falls upon the user. Little research has examined undergraduates' evaluation of web sites in science classes. The purpose of this study was to investigate on which websites college students selected and how they evaluated the websites used when developing individual positions about stem-cell research. We used a qualitative approach in search of patterns in undergraduates' website selection and evaluation criteria. We found that students used a variety of web resources from eleven types of websites to complete their independent research report. Students also used eleven evaluation criteria to evaluate these sources, some useful (e.g., credibility) and some not useful (e.g., readability). We found that university students struggled with critically evaluating online resources. Undergraduates need prompts to learn how to critically evaluate the science content provided within websites. This type of scaffold can facilitate useful evaluation and promote critical thinking required for becoming scientifically literate.
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Knowledge management in design teams using a project website
Otter, den A.F.H.J.; Lima, C.P
2007-01-01
In this paper the sharing of knowledge in architectural design teams using a Project Website is discussed. The results of multiple case studies, being part of a recently finished PhD research project to communication and performance of design teams using a Project Website, show that systems for
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Orientifolding of the ABJ Fermi gas
International Nuclear Information System (INIS)
Okuyama, Kazumi
2016-01-01
The grand partition functions of ABJ theory can be factorized into even and odd parts under the reflection of fermion coordinate in the Fermi gas approach. In some cases, the even/odd part of ABJ grand partition function is equal to that of N=5O(n)×USp(n"′) theory, hence it is natural to think of the even/odd projection of grand partition function as an orientifolding of ABJ Fermi gas system. By a systematic WKB analysis, we determine the coefficients in the perturbative part of grand potential of such orientifold ABJ theory. We also find the exact form of the first few “half-instanton” corrections coming from the twisted sector of the reflection of fermion coordinate. For the Chern-Simons level k=2,4,8 we find closed form expressions of the grand partition functions of orientifold ABJ theory, and for k=2,4 we prove the functional relations among the grand partition functions conjectured in http://arxiv.org/abs/1410.7658.
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Orientifolding of the ABJ Fermi gas
Okuyama, Kazumi
2016-03-01
The grand partition functions of ABJ theory can be factorized into even and odd parts under the reflection of fermion coordinate in the Fermi gas approach. In some cases, the even/odd part of ABJ grand partition function is equal to that of {N}=5O(n)× USp({n}^') theory, hence it is natural to think of the even/odd projection of grand partition function as an orientifolding of ABJ Fermi gas system. By a systematic WKB analysis, we determine the coefficients in the perturbative part of grand potential of such orientifold ABJ theory. We also find the exact form of the first few "half-instanton" corrections coming from the twisted sector of the reflection of fermion coordinate. For the Chern-Simons level k = 2 ,4 ,8 we find closed form expressions of the grand partition functions of orientifold ABJ theory, and for k = 2 , 4 we prove the functional relations among the grand partition functions conjectured in arXiv:1410.7658.
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Health information on internet: quality, importance, and popularity of persian health websites.
Samadbeik, Mahnaz; Ahmadi, Maryam; Mohammadi, Ali; Mohseni Saravi, Beniamin
2014-04-01
The Internet has provided great opportunities for disseminating both accurate and inaccurate health information. Therefore, the quality of information is considered as a widespread concern affecting the human life. Despite the increasingly substantial growth in the number of users, Persian health websites and the proportion of internet-using patients, little is known about the quality of Persian medical and health websites. The current study aimed to first assess the quality, popularity and importance of websites providing Persian health-related information, and second to evaluate the correlation of the popularity and importance ranking with quality score on the Internet. The sample websites were identified by entering the health-related keywords into four most popular search engines of Iranian users based on the Alexa ranking at the time of study. Each selected website was assessed using three qualified tools including the Bomba and Land Index, Google PageRank and the Alexa ranking. The evaluated sites characteristics (ownership structure, database, scope and objective) really did not have an effect on the Alexa traffic global rank, Alexa traffic rank in Iran, Google PageRank and Bomba total score. Most websites (78.9 percent, n = 56) were in the moderate category (8 ≤ x ≤ 11.99) based on their quality levels. There was no statistically significant association between Google PageRank with Bomba index variables and Alexa traffic global rank (P > 0.05). The Persian health websites had better Bomba quality scores in availability and usability guidelines as compared to other guidelines. The Google PageRank did not properly reflect the real quality of evaluated websites and Internet users seeking online health information should not merely rely on it for any kind of prejudgment regarding Persian health websites. However, they can use Iran Alexa rank as a primary filtering tool of these websites. Therefore, designing search engines dedicated to explore accredited
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STUDY REGARDING THE CHARACTERISTICS OF THE BIHOR COUNTY COMPANIES’ WEBSITES
Directory of Open Access Journals (Sweden)
Ţarcă Naiana
2013-07-01
Full Text Available Number of Internet users who access the websites of different companies to find information and to buy online is growing. In these conditions, the companies to be able to communicate the informational message, promotional message or intention to initiate trading exchange, must be present in the virtual environment. The company's website can be used as a tool in marketing strategy, as a means of developing identity or increasing the brand exposure, as a support for communication with potential clients or as a means for market research. The website, as an interface between customers and company, must answer as many questions as possible and it must trigger the impulse that motivates consumers to return and buy products/services from the company. This paper contains a study of the websites belonging to 330 companies from the Bihor County. In the study conducted were considered companies in Bihor County that are present in the virtual environment through websites. The elements that have been analysed are the measure and the manner in which companies use the online environment to comunicate their identity. The websites are analysed in terms of their design, in terms of the way it influences the experience in visualising the site and in terms of the design elements used to facilitate navigability, to encourage interaction between the visitor and the company, to prove credibility, accuracy and valability of the information and to demonstrate that the information is presented in an objective manner. We considered the following criteria for evaluation of sites: the presence of information about the organization such as general information, information about products and means of distribution, company location; the structure used to present the information on the website home page, the navigability elements, the elements to prove credibility, the quality level of the company products, the presence and percentage of graphics, applying the design principles
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Automated Detection of HONcode Website Conformity Compared to Manual Detection: An Evaluation
Boyer, Célia; Dolamic, Ljiljana
2015-01-01
Background To earn HONcode certification, a website must conform to the 8 principles of the HONcode of Conduct In the current manual process of certification, a HONcode expert assesses the candidate website using precise guidelines for each principle. In the scope of the European project KHRESMOI, the Health on the Net (HON) Foundation has developed an automated system to assist in detecting a website?s HONcode conformity. Automated assistance in conducting HONcode reviews can expedite the cu...
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Fermi-surface reconstruction and the origin of high-temperature superconductivity
International Nuclear Information System (INIS)
Norman, M.R.
2010-01-01
In crystalline lattices, the conduction electrons form waves, known as Bloch states, characterized by a momentum vector k. The defining characteristic of metals is the surface in momentum space that separates occupied from unoccupied states. This 'Fermi' surface may seem like an abstract concept, but it can be measured and its shape can have profound consequences for the thermal, electronic, and magnetic properties of a material. In the presence of an external magnetic field B, electrons in a metal spiral around the field direction, and within a semiclassical momentum-space picture, orbit around the Fermi surface. Physical properties, such as the magnetization, involve a sum over these orbits, with extremal orbits on the Fermi surface, i.e., orbits with minimal or maximal area, dominating the sum (Fig. 1(a)). Upon quantization, the resulting electron energy spectrum consists of Landau levels separated by the cyclotron energy, which is proportional to the magnetic field. As the magnetic field causes subsequent Landau levels to cross through the Fermi energy, physical quantities, such as the magnetization or resistivity, oscillate in response. It turns out that the period of these oscillations, when plotted as a function of 1/B, is proportional to the area of the extremal orbit in a plane perpendicular to the applied field (Fig. 1(b)). The power of the quantum oscillation technique is obvious: By changing the field direction, one can map out the Fermi surface, much like a blind man feeling an elephant. The nature and topology of the Fermi surface in high-T c cuprates has been debated for many years. Soon after the materials were discovered by Bednorz and Mueller, it was realized that superconductivity was obtained by doping carriers into a parent insulating state. This insulating state appears to be due to strong electronic correlations, and is known as a Mott insulator. In the case of cuprates, the electronic interactions force the electrons on the copper ion
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Raban, Magdalena Z; Tariq, Amina; Richardson, Lauren; Byrne, Mary; Robinson, Maureen; Li, Ling; Westbrook, Johanna I; Baysari, Melissa T
2016-07-21
Medication is the most common intervention in health care, and written medication information can affect consumers' medication-related behavior. Research has shown that a large proportion of Australians search for medication information on the Internet. To evaluate the medication information content, based on consumer medication information needs, and usability of 4 Australian health websites: Better Health Channel, myDr, healthdirect, and NPS MedicineWise . To assess website content, the most common consumer medication information needs were identified using (1) medication queries to the healthdirect helpline (a telephone helpline available across most of Australia) and (2) the most frequently used medications in Australia. The most frequently used medications were extracted from Australian government statistics on use of subsidized medicines in the community and the National Census of Medicines Use. Each website was assessed to determine whether it covered or partially covered information and advice about these medications. To assess website usability, 16 consumers participated in user testing wherein they were required to locate 2 pieces of medication information on each website. Brief semistructured interviews were also conducted with participants to gauge their opinions of the websites. Information on prescription medication was more comprehensively covered on all websites (3 of 4 websites covered 100% of information) than nonprescription medication (websites covered 0%-67% of information). Most websites relied on consumer medicines information leaflets to convey prescription medication information to consumers. Information about prescription medication classes was less comprehensive, with no website providing all information examined about antibiotics and antidepressants. Participants (n=16) were able to locate medication information on websites in most cases (accuracy ranged from 84% to 91%). However, a number of usability issues relating to website
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Design of the Resources and Environment Monitoring Website in Kashgar
International Nuclear Information System (INIS)
Huang, Z; Lin, Q Z; Wang, Q J
2014-01-01
Despite the development of the web geographical information system (web GIS), many useful spatial analysis functions are ignored in the system implementation. As Kashgar is rich in natural resources, it is of great significance to monitor the ample natural resource and environment situation in the region. Therefore, with multiple uses of spatial analysis, resources and environment monitoring website of Kashgar was built. Functions of water, vegetation, ice and snow extraction, task management, change assessment as well as thematic mapping and reports based on TM remote sensing images were implemented in the website. The design of the website was presented based on database management tier, the business logic tier and the top-level presentation tier. The vital operations of the website were introduced and the general performance was evaluated
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Party website – instrument of political communication. Case study: www.psd.ro
Directory of Open Access Journals (Sweden)
Monica Pătruţ
2012-06-01
Full Text Available Romanian political parties’ websites have developed especially after 2000 and have been used to disseminate information about candidates, campaigns and political agendas. Combining the quantitative content analysis with well-known models I will quantify the degree in which the Romanian Social Democratic Party website contributes to informing, connecting, involving, and mobilizing visitors. Another objective of the analysis is to pinpoint the place that websites occupy on the trajectory web 1.0 – web 2.0. The findings show that the political website is used more to inform and less to involve or mobilize visitors and that the SDP website is far from the web 2.0. taking account the virtual practices performed.
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Accessible Website Content Guidelines for Users with Intellectual Disabilities
Karreman, Joyce; van der Geest, Thea; Buursink, Esmee
2007-01-01
Background: The W3C Web Accessibility Initiative has issued guidelines for making websites better and easier to access for people with various disabilities (W3C Web Accessibility Initiative guidelines 1999). - Method: The usability of two versions of a website (a non-adapted site and a site that was
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MULTILANGUAGE WEBSITE CONCEPT FOR OPERATIONAL IT RISK RESEARCH
Romānovs, Andrejs; Lektauers, Arnis; Merkurjevs, Jurijs; Klimovs, Ruslans
2015-01-01
The paper presents an approach of researches effective organization in sphere of operational IT risk governance. For this purpose, the application of digital multilanguage research area is advised, which can simplify discussion processes for users/researchers from different countries. The concept of multilanguage website is developed based on performed analysis of following modern IT application trends of website development: Web 2.0., social networks, blogs, wiki, etc. Then, practical soluti...
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Emerging and continuing trends in vaccine opposition website content.
Bean, Sandra J
2011-02-24
Anti-vaccination websites appeal to persons searching the Internet for vaccine information that reinforces their predilection to avoid vaccination for themselves or their children. Few published studies have systematically examined these sites. The aim of this study was to employ content analysis as a useful tool for examining and comparing anti-vaccination websites for recurring and changing emphases in content, design, and credibility themes since earlier anti-vaccination website content analyses were conducted. Between February and May 2010, using a commonly available search engine followed by a deep web search, 25 websites that contained anti-vaccination content were reviewed and analyzed for 24 content, 14 design, and 13 credibility attributes. Although several content claims remained similar to earlier analyses, two new themes emerged: (1) the 2009 H1N1 epidemic threat was "manufactured," and (2) the increasing presence of so-called "expert" testimony in opposing vaccination. Anti-vaccination websites are constantly changing in response to the trends in public health and the success of vaccination. Monitoring the changes can permit public health workers to mount programs more quickly to counter the opposition arguments. Additionally, opposition claims commonly appeal to emotions whereas the supporting claims appeal to reason. Effective vaccine support may be better served by including more emotionally compelling content. Copyright © 2011 Elsevier Ltd. All rights reserved.
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NASA International Year of Astronomy 2009 Programs: Impacts and Future Plans (Invited)
Hasan, H.; Smith, D.; Stockman, S. A.
2009-12-01
The opportunity offered by the International Year of Astronomy (IYA) 2009 to increase the exposure of the public and students to NASA discoveries in astronomy resulted in several innovative programs which have reached audiences far and wide. Some examples of the impact of these programs and building on the success of these programs beyond 2009 will be discussed in this talk. The spectacular success of the traveling exhibit of NASA images to public libraries around the country prompted NASA to extend it to include more libraries. As a part of the IYA Cornerstone project From Earth To The Universe, NASA images were displayed at non-traditional sites such as airports, parks, and music festivals, exposing them to an audience which would otherwise have been unaware of them. The NASA IYA Student Ambassadors engaged undergraduate and graduate students throughout the U.S. in outreach programs they created to spread NASA astronomy to their local communities. NASA’s Afterschool Universe provided IYA training to community-based organizations, while pre-launch teacher workshops associated with the Kepler and WISE missions were designed to engage educators in the science of these missions. IYA activities have been associated with several missions launched this year. These include the Hubble Servicing Mission 4, Kepler, Herschel/Planck, LCROSS. NASA’sIYA website and Go Observe! feature remain popular. The associated IYA Discovery Guides and Observing with NASA MicroObservatory activities have guided the public and students to perform their own observations of the night sky and to interpret them. NASA intends to work with its Science Education and Public Outreach Forums (SEPOF) to develop a strategy to take forward the best of its IYA2009 plans forward so as to build on the momentum generated by IYA2009 and continue to keep the public and students engaged in the scientific exploration of the universe.
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Constraining decaying dark matter with FERMI-LAT gamma rays
International Nuclear Information System (INIS)
Maccione, L.
2011-01-01
High energy electron sand positrons from decaying dark matter can produce a significant flux of gamma rays by inverse Compton of low energy photons in the interstellar radiation field. This possibility is inevitably related with the dark matter interpretation of the observed PAMELA and FERMI excesses. We will describe a simple and universal method to constrain dark matter models which produce electrons and positrons in their decay by using the FERMI-LAT gamma-ray observations in the energy range between 0.5 GeV and 300 GeV, by exploiting universal response functions that, once convolved with a specific dark matter model, produce the desired constraint. The response functions contain all the astrophysical inputs. Here is discussed the uncertainties in the determination of the response functions and apply them to place constraints on some specific dark matter decay models that can well fit the positron and electron fluxes observed by PAMELA and FERMI LAT, also taking into account prompt radiation from the dark matter decay. With the available data decaying dark matter can not be excluded as source of the PAMELA positron excess.
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Calculated Fermi surface properties of LaSn3 and YSn3 under pressure
International Nuclear Information System (INIS)
Kanchana, V.
2012-01-01
The electronic structure, Fermi surface and elastic properties of the iso-structural and iso-electronic LaSn 3 and YSn 3 intermetallic compounds are studied under pressure within the frame work of density functional theory including spin-orbit coupling. The LaSn 3 Fermi surface consists of two sheets, of which the second is very complex. Under pressure a third sheet appears around compression V/V 0 =0.94, while a small topology changes in the second sheet is seen at compression V/V 0 =0.90. This may be in accordance with the anomalous behavior in the superconducting transition temperature observed in LaSn 3 , which has been suggested to reflect a Fermi surface topological transition, along with a non-monotonic pressure dependence of the density of states at the Fermi level. The similar behavior is not observed in YSn 3 for which the Fermi surface includes three sheets already at ambient conditions, and the topology remains unchanged under pressure. The reason for the difference in behavior between LaSn 3 and YSn 3 is the role of spin-orbit coupling and the hybridization of La-4f state with the Sn-p state in the vicinity of the Fermi level, which is well explained using the band structure calculation. The elastic constants and related mechanical properties are calculated at ambient as well as at elevated pressures. The elastic constants increase with pressure for both compounds and satisfy the conditions for mechanical stability under pressure. (author)
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Science from the first 10 months of observations from the Fermi Large Area Telescope
CERN. Geneva
2009-01-01
The Fermi observatory is an international, multi-agency satellite mission that was launched by NASA in june 2008 and has since then been exploring the high energy gamma-ray sky from 20 MeV to more than 300 GeV. This largely unexplored region of the electro-magnetic spectrum is home to emissions from the most energetic and mysterious objects in the cosmos, like black holes, active galactic nuclei, rapidly spinning neutron stars, supernovae remnants and gamma-ray bursters. Leveraging on the high instrument resolution and acceptance, and on an outstanding operation efficiency, the mission team has been able to record a remarkable variety of novel observations, spanning from astronomy to particle astrophysics with exciting implications on fundamental physics. At the same time the collaboration is preparing to deliver photon data and analysis tools to the public starting from the second year of operations, along with improved knowledge of the instrument performance. In this talk I will review some of the most inte...
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Developing an e-commerce Website for Spicetown Oy, using Drupal.
Inegbedion, Usunobun
2015-01-01
This project is aimed at creating a website to be used for e-commerce by Spicetown Oy, a wholesaler of African and Asian food products based in Helsinki. Spicetown Oy is a traditional brick-and-mortar business in the process of transitioning into a business model combining tra-ditional business carried out on physical premises with running an online shop. The main aim of this project is to design and build a website with an online store for Spicetown Oy. The website is implemented using Drup...
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Usable guidelines for usable websites? an analysis of five e-government heuristics
Welle Donker-Kuijer, M.C.J.; de Jong, Menno D.T.; Lentz, Leo
2010-01-01
Many government organizations use web heuristics for the quality assurance of their websites. Heuristics may be used by web designers to guide the decisions about a website in development, or by web evaluators to optimize or assess the quality of an existing website. Despite their popularity, very
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Search for Spatially Extended Fermi-LAT Sources Using Two Years of Data
Energy Technology Data Exchange (ETDEWEB)
Lande, Joshua; Ackermann, Markus; Allafort, Alice; Ballet, Jean; Bechtol, Keith; Burnett, Toby; Cohen-Tanugi, Johann; Drlica-Wagner, Alex; Funk, Stefan; Giordano, Francesco; Grondin, Marie-Helene; Kerr, Matthew; Lemoine-Goumard, Marianne
2012-07-13
Spatial extension is an important characteristic for correctly associating {gamma}-ray-emitting sources with their counterparts at other wavelengths and for obtaining an unbiased model of their spectra. We present a new method for quantifying the spatial extension of sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi). We perform a series of Monte Carlo simulations to validate this tool and calculate the LAT threshold for detecting the spatial extension of sources. We then test all sources in the second Fermi -LAT catalog (2FGL) for extension. We report the detection of seven new spatially extended sources.
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On the Fermi surface of YBa2Cu3O7-δ
International Nuclear Information System (INIS)
Peter, M.; Manuel, A.A.; Hoffmann, L.; Sadowski, W.
1992-01-01
We show that the signature of a Fermi surface sheet of YBa 2 Cu 3 O 7-δ may be obtained unambiguously from twinned crystals. Comparison of electron-positron momentum density from YBa 2 Cu 3 O 7-δ measured both in insulating and (superconducting) twinned phases leads to a decisive further proof of the existence of the Fermi surface in the metallic YBa 2 Cu 3 O 7-δ . In addition, measurements on untwinned YBA 2 Cu 3 O 7-δ single crystals reveal also a ridge Fermi surface sheet attributed by band structure calculations to CuO chains. 14 refs., 3 figs
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Ultracold Fermi and Bose gases and Spinless Bose Charged Sound Particles
Directory of Open Access Journals (Sweden)
Minasyan V.
2011-10-01
Full Text Available We propose a novel approach for investigation of the motion of Bose or Fermi liquid (or gas which consists of decoupled electrons and ions in the uppermost hyperfine state. Hence, we use such a concept as the fluctuation motion of “charged fluid particles” or “charged fluid points” representing a charged longitudinal elastic wave. In turn, this elastic wave is quantized by spinless longitudinal Bose charged sound particles with the rest mass m and charge e 0 . The existence of spinless Bose charged sound particles allows us to present a new model for description of Bose or Fermi liquid via a non-ideal Bose gas of charged sound particles . In this respect, we introduce a new postulation for the superfluid component of Bose or Fermi liquid determined by means of charged sound particles in the condensate, which may explain the results of experiments connected with ultra-cold Fermi gases of spin-polarized hydrogen, 6 Li and 40 K, and such a Bose gas as 87 Rb in the uppermost hyperfine state, where the Bose- Einstein condensation of charged sound particles is realized by tuning the magnetic field.
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Pseudogap and Fermi-Surface Topology in the Two-Dimensional Hubbard Model
Wu, Wei; Scheurer, Mathias S.; Chatterjee, Shubhayu; Sachdev, Subir; Georges, Antoine; Ferrero, Michel
2018-04-01
One of the distinctive features of hole-doped cuprate superconductors is the onset of a "pseudogap" below a temperature T* . Recent experiments suggest that there may be a connection between the existence of the pseudogap and the topology of the Fermi surface. Here, we address this issue by studying the two-dimensional Hubbard model with two distinct numerical methods. We find that the pseudogap only exists when the Fermi surface is holelike and that, for a broad range of parameters, its opening is concomitant with a Fermi-surface topology change from electronlike to holelike. We identify a common link between these observations: The polelike feature of the electronic self-energy associated with the formation of the pseudogap is found to also control the degree of particle-hole asymmetry, and hence the Fermi-surface topology transition. We interpret our results in the framework of an SU(2) gauge theory of fluctuating antiferromagnetism. We show that a mean-field treatment of this theory in a metallic state with U(1) topological order provides an explanation of this polelike feature and a good description of our numerical results. We discuss the relevance of our results to experiments on cuprates.
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How emotions stimulate people affected by cancer to use personalised health websites
Directory of Open Access Journals (Sweden)
Suncica Hadzidedic Bazdarevic
2015-12-01
Full Text Available This paper focuses on helping people affected by cancer – which is the leading cause of death worldwide - by identifying their personalisation needs for health websites. The aim is to identify a set of personalisation features that users prefer on these websites. Delving in a less explored area, the study also seeks to understand how user emotional states correlate with their needs for personalisation, to better define user models for health websites. Through a controlled experiment, based on the survey questionnaire method, we established that participants perceived that personalisation features offered on the evaluated website do meet their needs. More interestingly, perceived personalisation needs are influenced by certain emotions, primarily positively valenced emotions (e.g., interest. Finally, two factors positively impact intentions to reuse the website: personalisation needs and post-usage emotions. The outcomes of this study inform on ways to increase user engagement on health websites and improve online support available to people affected by cancer.
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Localization of Gamma-Ray Bursts Using the Fermi Gamma-Ray Burst Monitor
Connaughton, V.; Briggs, M.S.; Goldstein, A.; Meegan, C.A.; Paciesas, W.S.; Preece, R.D.; Wilson-Hodge, C.A.; Gibby, M.H.; Greiner, J.; Gruber, D.; Jenke, P.; Kippen, R.M.; Pelassa, V.; Xiong, S.; Yu, H-F.; Bhat, P.N.; Burgess, J.M.; Byrne, D.; Fitzpatrick, G.; Foley, S.; Giles, M.M.; Guiriec, S.; van der Horst, A.J.; von Kienlin, A.; McBreen, S.; McGlynn, S.; Tierney, D.; Zhang, B..B.
2015-01-01
The Fermi Gamma-ray Burst Monitor (GBM) has detected over 1400 gamma-ray bursts (GRBs) since it began science operations in 2008 July. We use a subset of over 300 GRBs localized by instruments such as Swift, the Fermi Large Area Telescope, INTEGRAL, and MAXI, or through triangulations from the
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Masthori, Arif; Nugroho, Hanung Adi; Ferdiana, Riri
2016-01-01
Website is an important facility that should be owned by government agency in the implementation of e-government. A good websiteservice quality will encourage the effectiveness in the implementation of e-government. To ensure the websiteservice quality, evaluating is needed.Existing evaluation method just only measure the website quality, not measure the level of benefits.This research aims to modifythe webqual method so it explores the website services quality from the user's perception and ...
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Alzheimer's disease dietary supplements in websites.
Palmour, Nicole; Vanderbyl, Brandy L; Zimmerman, Emma; Gauthier, Serge; Racine, Eric
2013-12-01
Consumer demand for health information and health services has rapidly evolved to capture and even propel the movement to online health information seeking. Seventeen percent (52 million) of health information internet users will look for information about memory loss, dementia and Alzheimer's disease (AD) (Fox Pew Internet & American life project: Online health search. Report. Pew Research Center. http://pewinternet.org/Reports/2006/Online-Health-Search-2006.aspx 2006, Pew Research Center. http://pewinternet.org/Reports/2011/HealthTopics.aspx 2011). We examined the content of the 25 most frequently retrieved websites marketing AD dietary supplements. We found that the majority of websites and their products claimed AD-related benefits, including improvement and enhancement of function, treatment for AD, prevention of AD, maintenance of function, delayed progression of AD, and decreased symptoms. Supplements were described as effective, natural, powerful or strong, dependable and pure or of high quality. Peer reviewed references to proper scientific studies were infrequent on websites. Statements highlighting the risks of dietary supplements were as common as statements mitigating or minimizing these risks. Different strategies were used to promote supplements such as popular appeals and testimonials. Further enforcement of relevant policy is needed and preparation of clinicians to deal with requests of patients and caregivers is indicated.
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Fermi and the Theory of Weak Interactions
Indian Academy of Sciences (India)
IAS Admin
Quantum Field Theory created by Dirac and used by Fermi to describe weak ... of classical electrodynamics (from which the electric field and magnetic field can be obtained .... Universe. However, thanks to weak interactions, this can be done.
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Usability study of youtube websites for Malaysian teenagers
Razak, Mohd Nur Faiz Abd; Hussain, Azham; Hamdi, Mohd Maizan Fishol
2017-10-01
Nowadays, YouTube is the 3rd most visited website in the world. It was created for users to search, watch and share video. Statistics show that YouTube run in more than 88 countries and support 76 different languages which covered almost 95% of Internet population globally. Therefore, a usability study is for specific type of users such as based on gender, range of age and country is considered a must for this kind of top website. In this study, we focus on YouTube website usability for Malaysian teenagers that are currently schooling in boarding school with limited access of Internet. It was done in a controlled lab environment with proper devices and software as MacBook, LCD Monitor, and WhatPulse heat map tracker. The evaluation was made based on usability metrics: ease of use, usefulness and satisfaction of users with combination of recording videos, mouse and keyboard heat map and questionnaires. Findings show that most of the respondents just use YouTube for video watching only while ignoring other features in the same time. There are difficulties in using it at the first moment but could catch up in short time. It shows how usable YouTube website especially in the learnability and memorability aspects.
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Designing a Medical Tourism Website: A Qualitative Study
SAMADBEIK, Mahnaz; ASADI, Heshmatollah; MOHSENI, Mohammad; TAKBIRI, Afsaneh; MOOSAVI, Ahmad; GARAVAND, Ali
2017-01-01
Background: Informing plays a prominent role in attracting medical tourists. The enjoyment of proper medical information systems is one of the most important tools for the attraction of medical tourists. Iran’s ability in designing and implementing information networks has remained largely unknown. The current study aimed to explore information needs for designing a medical tourism website. Methods: This qualitative study was conducted in 2015 for designing Hospital Medical-Tourism Website (HMTW). A purposive sampling method was used and data were gathered using a semi-structured questionnaire. Totally, 12 faculty members and experts in the field of medical tourism were interviewed. Data were analyzed using the MAXQDA10 software. Results: Totally 41 sub-themes and 10 themes were identified. The themes included the introduction of hospital, general guide for patients, tourism information, information related to physicians in hospital, costs, treatment follow-up, online hospital appointment scheduling in website, statistics and news of hospital medical tourism, photo gallery and contacts. Among the themes, the participants highly emphasized four themes including costs (100%), tourism information (91.6%), information related to physicians in hospital, (83.3%) and treatment follow-up (83.3%). Conclusion: This profitable industry can be developed through considering information requirements for hospital medical tourism website. PMID:28451562
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Designing a Medical Tourism Website: A Qualitative Study.
Samadbeik, Mahnaz; Asadi, Heshmatollah; Mohseni, Mohammad; Takbiri, Afsaneh; Moosavi, Ahmad; Garavand, Ali
2017-02-01
Informing plays a prominent role in attracting medical tourists. The enjoyment of proper medical information systems is one of the most important tools for the attraction of medical tourists. Iran's ability in designing and implementing information networks has remained largely unknown. The current study aimed to explore information needs for designing a medical tourism website. This qualitative study was conducted in 2015 for designing Hospital Medical-Tourism Website (HMTW). A purposive sampling method was used and data were gathered using a semi-structured questionnaire. Totally, 12 faculty members and experts in the field of medical tourism were interviewed. Data were analyzed using the MAXQDA10 software. Totally 41 sub-themes and 10 themes were identified. The themes included the introduction of hospital, general guide for patients, tourism information, information related to physicians in hospital, costs, treatment follow-up, online hospital appointment scheduling in website, statistics and news of hospital medical tourism, photo gallery and contacts. Among the themes, the participants highly emphasized four themes including costs (100%), tourism information (91.6%), information related to physicians in hospital, (83.3%) and treatment follow-up (83.3%). This profitable industry can be developed through considering information requirements for hospital medical tourism website.
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Commitment to sustainability: A content analysis of website for university organisations
Hasim, M. S.; Hashim, A. E.; Ariff, N. R. M.; Sapeciay, Z.; Abdullah, A. S.
2018-02-01
This research aim on investigating the commitments of organisations towards sustainability. For this research context, ‘commitment’ refers to the extent of information provided by universities in their website which demonstrated initiatives towards achieving the sustainability goal. The objective of this study was to identify sustainability initiatives highlighted within university websites using Australia as a case study. Thirty-nine (39) websites were reviewed and web content analysis was performed to publicly available data including any relevant accessible PDF documents attached to the universities website. Specific websites information was reviewed to detect sustainability themes in the broad university management and operations (i.e., in general policies, corporate mission statements, research activities, positions available and strategies). The commitment of Australian universities was significant and well established with a set of twenty (20) related themes were identified. The findings have some limitations because the established themes only emerged from the websites’ content without human validation which possibly weakens the correlations between website information and organisations actual practice. This possibility is recognised and for this reason, further assessment may be advantageous to provide verification of the findings. Therefore, further studies using other techniques are suggested such as interviews or observations for validation of data and reinforce the entire conclusions. An interesting aspect of this study is the validity of reviewing organisational websites for gauging actual practice and a number of researchers supporting this approached as indicated in methodology section of this paper.
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Website Service Quality in Ireland: An Empirical Study
Connolly, Regina
Despite the fact that service quality is a critical determinant of website success, studies show that consumers frequently view the service quality delivered through websites as unsatisfactory. This paper outlines a study that investigated the dimensions of website service excellence valued by Irish customers of a small-to-medium enterprise specialising in gifts. The E-S-QUAL measurement instrument was applied to the customers who purchase products online from this retailer, in order to determine their purchasing patterns and the dimensions of e-service quality that they value. The results of this study indicate the effectiveness of the instrument in determining gaps in e-service quality. The findings will be of benefit both to practitioners and researchers seeking to improve their understanding of the factors that contribute towards the creation and maintenance of consumer satisfaction in Irish online transactions.
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Online politics: a cross-national explanatory analysis of political websites
van Noort, G.; Kruikemeier, S.; Aparaschivei, A.; Boomgaarden, H.; Vliegenthart, R.
2013-01-01
This study provides a systematic investigation of party and candidate websites in five European countries: Germany, Romania, Hungary, The Netherlands and Great Britain. It examines three features of online political communication that are presented on political websites (interactivity,
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'Total girlfriend experience': examining marketplace mythologies on sex tourism websites.
Gezinski, Lindsay B; Karandikar, Sharvari; Levitt, Alexis; Ghaffarian, Roxane
2016-07-01
The purpose of this study was to conduct a systematic content analysis of sex tour websites to understand how sex tours are marketed to potential clients. A total of 380 web pages from 21 sex tour websites were reviewed. The sex tour websites sought to promote privacy and hassle-free travel with a local 'escort' and the opportunity for 'hooks-ups' with no strings attached. Three themes emerged around the description of sex workers: (1) enjoyment and complete acceptance, (2) a 'total girlfriend experience' and (3) exoticisation of the 'Third World' woman. The majority of the sex tourism websites used marketplace mythologies concerning racism, sexism and imperialism to appeal to sex tourists' desires for fantasy experiences, power and domination, and a renewed sense of identity. Legal and STI-related information was largely missing from the websites, and when it was included it was aimed at protecting sex tourists, not sex workers. It is of importance for researchers, social workers and others engaging with sex workers and sexscapes to recognise the power of language, cultural myths and framings and their ability to generate real-world social and health implications.
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DEFF Research Database (Denmark)
Di Pietro, Nina C; Whiteley, Louise Emma; Illes, Judy
2011-01-01
The Internet has quickly gained popularity as a major source of health-related information, but its impact is unclear. Here, we investigate the extent to which advocacy websites for three neurodevelopmental disorders—cerebral palsy (CP), autism spectrum disorder (ASD) and fetal alcohol spectrum...... disorder (FASD)—inform stakeholders about treatment options, and discuss the ethical challenges inherent in providing such information online. We identified major advocacy websites for each disorder and assessed website accountability, the number, attributes, and accessibility of treatments described......, and the valence of treatment information. With the exception of FASD websites, we found that advocacy websites provide a plethora of information about a wide variety of readily available products and services. Treatment information is primarily targeted at families and is overwhelmingly encouraging, regardless...
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Search for a neutrino emission from the Fermi Bubbles with the ANTARES telescope
BIAGI, S
2012-01-01
The first search for neutrinos from the Fermi Bubbles is presented using data collected by the ANTARES telescope. No evidence of a neutrino signal from the Fermi Bubbles region was found, hence upper limits were calculated for different energy cutoffs.
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Perancangan Model Data Flow Diagram Untuk Mengukur Kualitas Website Menggunakan Webqual 4.0
Directory of Open Access Journals (Sweden)
Karina Hapsari
2017-05-01
Full Text Available The more competition the e-commerce company and the development of technology company in Indonesia, website of Zalora Indonesia traffic rank declining. Measuring the quality of website by using WebQual 4.0 will help manage the web to be able to adjust the quality of the web with user perception. The research aims to make design of Data Flow Diagram model to measure website quality using WebQual 4.0 based on user satisfaction variable. A case study was conducted on the Zalora Indonesia website. Data Flow model is used to make design of system model recommendation, while WebQual 4.0 method is used to measure website quality to user satisfaction. The research data using primary data in the form of questionnaires involving 384 respondents in the city of Bandung who had transacted on the website Zalora Indonesia. Data analysis technique applies descriptive analysis. Based on the research result on the quality of the website Zalora Indonesia, simultaneous positive and significant impact on user satisfaction Zalora Indonesia website. t test result showed that three variables partially have a posotive impact on user satisfaction Zalora Indonesia website is usability quality, information quality and service interaction quality, with Information quality variable has largest impact. Therefore, the modeling system using the Context Diagram-Data Flow Diagram focused on information quality variable.
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THE FIRST FERMI-LAT GAMMA-RAY BURST CATALOG
Energy Technology Data Exchange (ETDEWEB)
Ackermann, M. [Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen (Germany); Ajello, M. [Space Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450 (United States); Asano, K. [Interactive Research Center of Science, Tokyo Institute of Technology, Meguro City, Tokyo 152-8551 (Japan); Axelsson, M. [Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden); Baldini, L. [Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa I-56127 Pisa (Italy); Ballet, J. [Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d' Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France); Barbiellini, G. [Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy); Bastieri, D. [Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy); Bechtol, K.; Bloom, E. D. [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Bellazzini, R.; Bregeon, J. [Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy); Bhat, P. N. [Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville, Huntsville, AL 35899 (United States); Bissaldi, E. [Institut für Astro- und Teilchenphysik and Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck (Austria); Bonamente, E. [Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy); Bonnell, J.; Brandt, T. J. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Bouvier, A., E-mail: nicola.omodei@stanford.edu, E-mail: giacomov@slac.stanford.edu [Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States); and others
2013-11-01
In three years of observations since the beginning of nominal science operations in 2008 August, the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope has observed high-energy (∼> 20 MeV) γ-ray emission from 35 gamma-ray bursts (GRBs). Among these, 28 GRBs have been detected above 100 MeV and 7 GRBs above ∼20 MeV. The first Fermi-LAT catalog of GRBs is a compilation of these detections and provides a systematic study of high-energy emission from GRBs for the first time. To generate the catalog, we examined 733 GRBs detected by the Gamma-Ray Burst Monitor (GBM) on Fermi and processed each of them using the same analysis sequence. Details of the methodology followed by the LAT collaboration for the GRB analysis are provided. We summarize the temporal and spectral properties of the LAT-detected GRBs. We also discuss characteristics of LAT-detected emission such as its delayed onset and longer duration compared with emission detected by the GBM, its power-law temporal decay at late times, and the fact that it is dominated by a power-law spectral component that appears in addition to the usual Band model.
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The First FERMI-LAT Gamma-Ray Burst Catalog
Ackermann, M.; Ajello, M.; Asano, K.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.;
2013-01-01
In three years of observations since the beginning of nominal science operations in 2008 August, the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope has observed high-energy great than (20 MeV) gamma-ray emission from 35 gamma-ray bursts (GRBs). Among these, 28 GRBs have been detected above 100 MeV and 7 GRBs above approximately 20 MeV. The first Fermi-LAT catalog of GRBs is a compilation of these detections and provides a systematic study of high-energy emission from GRBs for the first time. To generate the catalog, we examined 733 GRBs detected by the Gamma-Ray Burst Monitor (GBM) on Fermi and processed each of them using the same analysis sequence. Details of the methodology followed by the LAT collaboration for the GRB analysis are provided. We summarize the temporal and spectral properties of the LAT-detected GRBs. We also discuss characteristics of LAT-detected emission such as its delayed onset and longer duration compared with emission detected by the GBM, its power-law temporal decay at late times, and the fact that it is dominated by a power-law spectral component that appears in addition to the usual Band model.
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THE FIRST FERMI-LAT GAMMA-RAY BURST CATALOG
International Nuclear Information System (INIS)
Ackermann, M.; Ajello, M.; Asano, K.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bloom, E. D.; Bellazzini, R.; Bregeon, J.; Bhat, P. N.; Bissaldi, E.; Bonamente, E.; Bonnell, J.; Brandt, T. J.; Bouvier, A.
2013-01-01
In three years of observations since the beginning of nominal science operations in 2008 August, the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope has observed high-energy (∼> 20 MeV) γ-ray emission from 35 gamma-ray bursts (GRBs). Among these, 28 GRBs have been detected above 100 MeV and 7 GRBs above ∼20 MeV. The first Fermi-LAT catalog of GRBs is a compilation of these detections and provides a systematic study of high-energy emission from GRBs for the first time. To generate the catalog, we examined 733 GRBs detected by the Gamma-Ray Burst Monitor (GBM) on Fermi and processed each of them using the same analysis sequence. Details of the methodology followed by the LAT collaboration for the GRB analysis are provided. We summarize the temporal and spectral properties of the LAT-detected GRBs. We also discuss characteristics of LAT-detected emission such as its delayed onset and longer duration compared with emission detected by the GBM, its power-law temporal decay at late times, and the fact that it is dominated by a power-law spectral component that appears in addition to the usual Band model
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Building a new core website for CERN
CERN Bulletin
2011-01-01
The web was born at CERN, but as early adopters, our own web presence now needs some love. With a new era of discovery ahead of us, the Communication Group is embarking on a project to develop a new core website for CERN that will make it easier and more enjoyable to access information in a timely way. The Bulletin catches up with Dan Noyes, who is leading this project, to learn more. CERN’s online presence is currently spread across many disparate websites, all separately managed. For example, there is no single home for news and announcements; the Bulletin is published every two weeks and, in between publications, news and announcements appear in a number of channels such as the users' page, Twitter, the Quantum Diaries blog, e-mails from Management direct to staff and users, and so on. "The idea of the new core website for CERN is to create a single place where one can find all this information," says Dan. The project, supported by the DG and th...
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A Literature Review: Website Design and User Engagement.
Garett, R; Chiu, J; Zhang, L; Young, SD
2016-01-01
Proper design has become a critical element needed to engage website and mobile application users. However, little research has been conducted to define the specific elements used in effective website and mobile application design. We attempt to review and consolidate research on effective design and to define a short list of elements frequently used in research. The design elements mentioned most frequently in the reviewed literature were navigation, graphical representation, organization, c...
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Hotel website performance: evidence from a transition country
Ljudevit Pranić; Daniela Garbin Praničević; Josip Arnerić
2014-01-01
The Purpose – An evaluation of 197 hotel websites in Croatia was conducted to determine whether hotels in this economically lagging transition country exploit the potentials of the Internet as a marketing tool. Design/Methodology/Approach – A team of 30 trained assistants evaluated the websites using an amended modified Balanced Scorecard (mBSC) approach from the user-friendliness, site attractiveness, marketing effectiveness, and F&B informativeness perspectives. MANOVA was used to test m...
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Radiology on Internet: advice in consulting websites and evaluating their quality
International Nuclear Information System (INIS)
Rolland, Y.; Bousquet, C.; Duvauferrier, R.; Pouliquen, B.; Le Beux, P.; Fresnel, A.
2000-01-01
Services offered by Internet are increasing continually and 15,000 medical websites covering all the specialties are available presently. Finding relevant information with a spider-web organization is difficult. We recommend starting with hierarchical lists which propose a selection of sites corresponding to medical specialties. We give our selection of important radiological websites dealing with image databases, case reports, radioanatomy and continuing medical education. While surfing the Web, an evaluation of the quality of websites is necessary. We used quality criteria proposed by Darmoni to rate the quality of ten websites. The global quality is good; help pages and external links are the main noticed shortcomings. All webmasters should pay attention to quality criteria and show visible marks of Darmoni criteria on their home page. To be able to foresee which Internet options should be developed, we evaluated our website and sent a questionnaire to our users. Clinical cases are the most requested facilities; they could be used for continuing medical education. (orig.)
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Babies' Portal Website Hearing Aid Section: Assessment by Audiologists
Directory of Open Access Journals (Sweden)
Bastos, Bárbara Guimarães
2014-02-01
Full Text Available Introduction The family has ultimate responsibility for decisions about the use and care during the daily routine and problem solving in the manipulation of hearing aids (HA in infants and children. Objective The purpose of the study was to assess technical and content quality of Babies' Portal website Hearing Aid section by audiologists. Methods Letters and e-mails were sent inviting professionals to surf the website and anonymously fill out an online form with 58 questions covering demographic data as well as the website's technical (Emory questionnaire with the subscales of accuracy, authorship, updates, public, navigation, links, and structure and content quality. Results A total of 109 professionals (tree men and 106 women with mean age of 31.6 years participated in the study. Emory percentage scores ranged from 90.1 to 96.7%. The Hearing Aid section contents were considered good or very good. Conclusion The website was deemed to have good technical and content quality, being suitable to supplement informational counseling to parents of hearing-impaired children fitted with hearing aids.
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A review of pediatric dentistry program websites: what are applicants learning about our programs?
Lin, Jenn-Yih; Lee, Jung; Davidson, Bo; Farquharson, Kara; Shaul, Cheryl; Kim, Sara
2010-06-01
The purpose of this study was twofold: 1) to examine website content provided by U.S. and Canadian pediatric dentistry residency programs, and 2) to understand aspects of program websites that dental students report to be related to their interests. Sixty-eight program websites were reviewed by five interprofessional evaluators. A thirty-six-item evaluation form was organized into 1) program descriptive items listed on the American Academy of Pediatric Dentistry (AAPD) website (n=21); 2) additional program descriptive items not listed on the AAPD website but of interest (n=9); and 3) items related to website interface design (n=5). We also surveyed fifty-four dental students regarding their interest in various aspects of program descriptions. The results of this study suggest that pediatric dentistry residency programs in general tend to provide identical or less information than what is listed on the AAPD website. The majority of respondents (76 percent) reported that residency program websites would be their first source of information about advanced programs. The greatest gap between the available website information and students' interests exists in these areas: stipend and tuition information, state licensure, and program strengths. Pediatric dentistry residency programs underutilize websites as a marketing and recruitment tool and should incorporate more information in areas of students' priority interests.
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Statistical mechanics of magnetized pair Fermi gas
International Nuclear Information System (INIS)
Daicic, J.; Frankel, N.E.; Kowalenko, V.
1993-01-01
Following previous work on the magnetized pair Bose gas this contribution presents the statistical mechanics of the charged relativistic Fermi gas with pair creation in d spatial dimensions. Initially, the gas in no external fields is studied. As a result, expansions for the various thermodynamic functions are obtained in both the μ/m→0 (neutrino) limit, and about the point μ/m =1, where μ is the chemical potential. The thermodynamics of a gas of quantum-number conserving massless fermions is also discussed. Then a complete study of the pair Fermi gas in a homogeneous magnetic field, is presented investigating the behavior of the magnetization over a wide range of field strengths. The inclusion of pairs leads to new results for the net magnetization due to the paramagnetic moment of the spins and the diamagnetic Landau orbits. 20 refs
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An Integrable Approximation for the Fermi Pasta Ulam Lattice
Rink, Bob
This contribution presents a review of results obtained from computations of approximate equations of motion for the Fermi-Pasta-Ulam lattice. These approximate equations are obtained as a finite-dimensional Birkhoff normal form. It turns out that in many cases, the Birkhoff normal form is suitable for application of the KAM theorem. In particular, this proves Nishida's 1971 conjecture stating that almost all low-energetic motions of the anharmonic Fermi-Pasta-Ulam lattice with fixed endpoints are quasi-periodic. The proof is based on the formal Birkhoff normal form computations of Nishida, the KAM theorem and discrete symmetry considerations.
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Exotic Paired States with Anisotropic Spin-Dependent Fermi Surfaces
International Nuclear Information System (INIS)
Feiguin, Adrian E.; Fisher, Matthew P. A.
2009-01-01
We propose a model for realizing exotic paired states in cold Fermi gases by using a spin-dependent optical lattice to engineer mismatched Fermi surfaces for each hyperfine species. The BCS phase diagram shows a stable paired superfluid state with coexisting pockets of momentum space with gapless unpaired carriers, similar to the Sarma state in polarized mixtures, but in our case the system is unpolarized. We propose the possible existence of an exotic 'Cooper-pair Bose-metal' phase, which has a gap for single fermion excitations but gapless and uncondensed 'Cooper-pair' excitations residing on a 'Bose surface' in momentum space.
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Solitons as candidates for energy carriers in Fermi-Pasta-Ulam lattices
Ming, Yi; Ye, Liu; Chen, Han-Shuang; Mao, Shi-Feng; Li, Hui-Min; Ding, Ze-Jun
2018-01-01
Currently, effective phonons (renormalized or interacting phonons) rather than solitary waves (for short, solitons) are regarded as the energy carriers in nonlinear lattices. In this work, by using the approximate soliton solutions of the corresponding equations of motion and adopting the Boltzmann distribution for these solitons, the average velocities of solitons are obtained and are compared with the sound velocities of energy transfer. Excellent agreements with the numerical results and the predictions of other existing theories are shown in both the symmetric Fermi-Pasta-Ulam-β lattices and the asymmetric Fermi-Pasta-Ulam-α β lattices. These clearly indicate that solitons are suitable candidates for energy carriers in Fermi-Pasta-Ulam lattices. In addition, the root-mean-square velocity of solitons can be obtained from the effective phonons theory.
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Hunting for treasures among the Fermi unassociated sources: A multiwavelength approach
International Nuclear Information System (INIS)
Acero, F.; Ojha, R.; Donato, D.; Ferrara, E.; Stevens, J.; Edwards, P. G.; Blanchard, J.; Lovell, J. E. J.; Thompson, D. J.
2013-01-01
The Fermi Gamma-Ray Space Telescope has been detecting a wealth of sources where the multiwavelength counterpart is either inconclusive or missing altogether. We present a combination of factors that can be used to identify multiwavelength counterparts to these Fermi unassociated sources. This approach was used to select and investigate seven bright, high-latitude unassociated sources with radio, UV, X-ray, and γ-ray observations. As a result, four of these sources are candidates to be active galactic nuclei, and one to be a pulsar, while two do not fit easily into these known categories of sources. The latter pair of extraordinary sources might reveal a new category subclass or a new type of γ-ray emitter. These results altogether demonstrate the power of a multiwavelength approach to illuminate the nature of unassociated Fermi sources.
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Directory of Open Access Journals (Sweden)
Philipp Strack
2014-04-01
Full Text Available We study the nature of superfluid pairing in imbalanced Fermi mixtures in two spatial dimensions. We present evidence that the combined effect of Fermi surface mismatch and order parameter fluctuations of the superfluid condensate can lead to continuous quantum phase transitions from a normal Fermi mixture to an intermediate Sarma-Liu-Wilczek superfluid with two gapless Fermi surfaces—even when mean-field theory (incorrectly predicts a first-order transition to a phase-separated “Bardeen-Cooper-Schrieffer plus excess fermions” ground state. We propose a mechanism for non-Fermi-liquid behavior from repeated scattering processes between the two Fermi surfaces and fluctuating Cooper pairs. Prospects for experimental observation with ultracold atoms are discussed.
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Root, Ralph; Wickland, Diane
2001-01-01
In 1997 the Office of Biological Informatics and Outreach (OBIO), Biological Resources Division, US Geological Survey and NASA, Office of Earth Science (OES), initiated a coordinated effort for applying Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) data and analysis, as a technology transfer project, to critical DOI environmental issues in four study sites throughout the United States. This work was accomplished by four US Department of the Interior (DOI) study teams with support from NASA/OES principal investigators and the Office of Earth Science programs. The studies, including personnel, objectives, background, project plans, and milestones were documented in a project website at . This report summarizes the final outcomes of the project, detailing accomplishments, lessons learned, and benefits realized to NASA, the US Geological Survey, and the participating DOI bureaus.
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Designing Public Library Websites for Teens: A Conceptual Model
Naughton, Robin Amanda
2012-01-01
The main goal of this research study was to develop a conceptual model for the design of public library websites for teens (TLWs) that would enable designers and librarians to create library websites that better suit teens' information needs and practices. It bridges a gap in the research literature between user interface design in human-computer…
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Directory of Open Access Journals (Sweden)
Pietro eGhezzi
2015-08-01
Full Text Available Background and aims: Most of the instruments used to assess the quality of health information on the Web (e.g. the JAMA criteria only analyze one dimension of information quality, trustworthiness. We try to compare these characteristics with the type of treatments the website describe, whether evidence-based medicine or note, and correlate this with the established criteria.Methods: We searched Google for migraine cure and analyzed the first 200 websites for: 1 JAMA criteria (authorship, attribution, disclosure, currency; 2 class of websites (commercial, health portals, professional, patient groups, no-profit; and 3 type of intervention described (approved drugs, alternative medicine, food, procedures, lifestyle, drugs still at the research stage. We used hierarchical cluster analysis to assess associations between classes of websites and types of intervention described. Subgroup analysis on the first 10 websites returned was performed. Results: Google returned health portals (44%, followed by commercial websites (31% and journalism websites (11%. The type of intervention mentioned most often was alternative medicine (55%, followed by procedures (49%, lifestyle (42%, food (41% and approved drugs (35%. Cluster analysis indicated that health portals are more likely to describe more than one type of treatment while commercial websites most often describe only one. The average JAMA score of commercial websites was significantly lower than for health portals or journalism websites, and this was mainly due to lack of information on the authors of the text and indication of the date the information was written. Looking at the first 10 websites from Google, commercial websites are under-represented and approved drugs over-represented. Conclusions: This approach allows the appraisal of the quality of health-related information on the Internet focusing on the type of therapies/prevention methods that are shown to the patient.
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Internet Information for Patients on Cancer Diets - an Analysis of German Websites.
Herth, Natalie; Kuenzel, Ulrike; Liebl, Patrick; Keinki, Christian; Zell, Joerg; Huebner, Jutta
2016-01-01
In recent years, the Internet has become an important source of information for cancer patients. Various cancer diets that are publicized on the Web promise significant benefits. The aim of our study was to evaluate the quality of online patient information about cancer diets. A patient's search for 'cancer diets' on German websites was simulated using the search engine Google. The websites were evaluated utilizing a standardized instrument with formal and content aspects. An analysis of 60 websites revealed that websites from nonprofit associations as well as self-help groups offer the best content and formal ranking. Websites whose owners aim to make a profit, practices that offer cancer diet therapies, and newspapers received the poorest quality score. The majority of content provided on the Web gets published by profit-oriented content groups. The divergence between profit-driven websites offering low-quality content and the few trustworthy websites on cancer diets is enormous. The information given online about cancer diets may turn out to be a hazardous pitfall. In order to present evidence-based information about cancer diets, online information should be replenished to create a more accurate picture and give higher visibility to the right information. © 2016 S. Karger GmbH, Freiburg.
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Comprehensive Evaluation and Analysis of China's Mainstream Online Map Service Websites
Zhang, H.; Jiang, J.; Huang, W.; Wang, Q.; Gu, X.
2012-08-01
With the flourish development of China's Internet market, all kinds of users for map service demand is rising continually, within it contains tremendous commercial interests. Many internet giants have got involved in the field of online map service, and defined it as an important strategic product of the company. The main purpose of this research is to evaluate these online map service websites comprehensively with a model, and analyse the problems according to the evaluation results. Then some corresponding solving measures are proposed, which provides a theoretical and application guidance for the future development of fiercely competitive online map websites. The research consists of three stages: (a) the mainstream online map service websites in China are introduced and the present situation of them is analysed through visit, investigation, consultant, analysis and research. (b) a whole comprehensive evaluation quota system of online map service websites from the view of functions, layout, interaction design color position and so on, combining with the data indexes such as time efficiency, accuracy, objectivity and authority. (c) a comprehensive evaluation to these online map service websites is proceeded based on the fuzzy evaluation mathematical model, and the difficulty that measure the map websites quantitatively is solved.
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Theoretical reconsideration of antiferromagnetic Fermi surfaces in URu{sub 2}Si{sub 2}
Energy Technology Data Exchange (ETDEWEB)
Yamagami, Hiroshi, E-mail: yamagami@cc.kyoto-su.ac.jp [Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto 603-8555 (Japan)
2011-01-01
In an itinerant 5f-band model, the antiferromagnetic (AFM) Fermi surfaces of URu{sub 2}Si{sub 2} are reconsidered using a relativistic LAPW method within a local spin-density approximation, especially taking into account the lattice parameters dependent on pressures. The reduction of the z-coordinate of the Si sites results in the effect of flattening the Ru-Si layers of URu{sub 2}Si{sub 2} crystal structure, thus weakening a hybridization/mixing between the U-5f and Ru-4d states in the band structure. Consequently the 5f bands around the Fermi level are more flat in the dispersion with decreasing the z-coordinate, thus producing three closed Fermi surfaces like 'curing-stone', 'rugby-ball' and 'ball'. The origins of de Haas-van Alphen branches can be qualitatively interpreted from the obtained AFM Fermi surfaces.
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The Large Area Telescope in the context of the extended Fermi mission
International Nuclear Information System (INIS)
Baldini, Luca
2013-01-01
Launched on June 11, 2008 with the goal of a 10-year lifetime, the Fermi observatory is nearing completion of the 5-year prime phase of the mission. In this paper we briefly review the prospects of the Large Area Telescope (the main instrument on board Fermi) in the context of the extended mission
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What drives Users' Website Registration?
T. Li (Ting); P.A. Pavlou (Paul)
2013-01-01
textabstractUser registration is an important prerequisite for the success of many websites by enabling users to gain access to domain information and personalized content. It is not always desirable for users, however, because they need to disclose personal information. This paper examines what
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Efimov three-body states on top of a Fermi sea
International Nuclear Information System (INIS)
Nygaard, Nicolai Gayle; Zinner, Nikolaj Thomas
2014-01-01
The stabilization of Cooper pairs of bound electrons in the background of a Fermi sea is the origin of superconductivity and the paradigmatic example of the striking influence of many-body physics on few-body properties. In the quantum-mechanical three-body problem the famous Efimov effect yields unexpected scaling relations among a tower of universal states. These seemingly unrelated problems can now be studied in the same setup thanks to the success of ultracold atomic gas experiments. In light of the tremendous effect of a background Fermi sea on two-body properties, a natural question is whether a background can modify or even destroy the Efimov effect. Here we demonstrate how the generic problem of three interacting particles changes when one particle is embedded in a background Fermi sea, and show that Efimov scaling persists. It is found in a scaling that relates the three-body physics to the background density of fermionic particles
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DIRAC framework evaluation for the Fermi-LAT and CTA experiments
International Nuclear Information System (INIS)
Arrabito, L; Cohen-Tanugi, J; Piron, F; Renaud, M; Rolland, V; Diaz, R Graciani; Longo, F; Kuss, M; Sapunov, M; Tsaregorodtsev, A; Zimmer, S
2014-01-01
DIRAC (Distributed Infrastructure with Remote Agent Control) is a general framework for the management of tasks over distributed heterogeneous computing environments. It has been originally developed to support the production activities of the LHCb (Large Hadron Collider Beauty) experiment and today is extensively used by several particle physics and biology communities. Current (Fermi Large Area Telescope – LAT) and planned (Cherenkov Telescope Array – CTA) new generation astrophysical/cosmological experiments, with very large processing and storage needs, are currently investigating the usability of DIRAC in this context. Each of these use cases has some peculiarities: Fermi-LAT will interface DIRAC to its own workflow system to allow the access to the grid resources, while CTA is using DIRAC as workflow management system for Monte Carlo production and analysis on the grid. We describe the prototype effort that we lead toward deploying a DIRAC solution for some aspects of Fermi-LAT and CTA needs.
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Automated assessment of the quality of depression websites.
Griffiths, Kathleen M; Tang, Thanh Tin; Hawking, David; Christensen, Helen
2005-12-30
Since health information on the World Wide Web is of variable quality, methods are needed to assist consumers to identify health websites containing evidence-based information. Manual assessment tools may assist consumers to evaluate the quality of sites. However, these tools are poorly validated and often impractical. There is a need to develop better consumer tools, and in particular to explore the potential of automated procedures for evaluating the quality of health information on the web. This study (1) describes the development of an automated quality assessment procedure (AQA) designed to automatically rank depression websites according to their evidence-based quality; (2) evaluates the validity of the AQA relative to human rated evidence-based quality scores; and (3) compares the validity of Google PageRank and the AQA as indicators of evidence-based quality. The AQA was developed using a quality feedback technique and a set of training websites previously rated manually according to their concordance with statements in the Oxford University Centre for Evidence-Based Mental Health's guidelines for treating depression. The validation phase involved 30 websites compiled from the DMOZ, Yahoo! and LookSmart Depression Directories by randomly selecting six sites from each of the Google PageRank bands of 0, 1-2, 3-4, 5-6 and 7-8. Evidence-based ratings from two independent raters (based on concordance with the Oxford guidelines) were then compared with scores derived from the automated AQA and Google algorithms. There was no overlap in the websites used in the training and validation phases of the study. The correlation between the AQA score and the evidence-based ratings was high and significant (r=0.85, Psites with zero PageRanks were included the association was weak and non-significant (r=0.23, P=.22). When sites with zero PageRanks were excluded, the correlation was moderate (r=.61, P=.002). Depression websites of different evidence-based quality can be
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Fermi surface properties of paramagnetic NpCd11 with a large unit cell
Homma, Yoshiya; Aoki, Dai; Haga, Yoshinori; Settai, Rikio; Sakai, Hironori; Ikeda, Shugo; Yamamoto, Etsuji; Nakamura, Akio; Shiokawa, Yoshinobu; Takeuchi, Tetsuya; Yamagami, Hiroshi; Ōnuki, Yoshichika
2010-03-01
We succeeded in growing a high-quality single crystal of NpCd11 with the cubic BaHg11-type structure by the Cd-self flux method. The lattice parameter of a = 9.2968(2) Å and crystallographic positions of the atoms were determined by x-ray single-crystal structure analysis. From the results of the magnetic susceptibility and specific heat experiments, this compound is found to be a 5f-localized paramagnet with the singlet ground state in the crystalline electric field (CEF) scheme. Fermi surface properties were measured using the de Haas-van Alphen (dHvA) technique. Long-period oscillations were observed in the dHvA frequency range of 9.1 x 105 to 1.9 x 107 Oe, indicating small cross-sectional areas of Fermi surfaces, which is consistent with a small Brillouin zone based on a large unit cell. From the results of dHvA and magnetoresistance experiments, the Fermi surface of NpCd11 is found to consist of many kinds of closed Fermi surfaces and a multiply-connected-like Fermi surface, although the result of energy band calculations based on the 5f-localized Np3+(5f4) configuration reveals the existence of only closed Fermi surfaces. The corresponding cyclotron effective mass is small, ranging from 0.1 to 0.7 m0, which is consistent with a small electronic specific heat coefficient γ ≅ 10mJ/K2·mol, revealing no hybridization between the 5f electrons and conduction electrons.
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Online servicescape dimensions as predictors of website trust in the ...
African Journals Online (AJOL)
completely. Therefore organisations should focus on designing user-friendly websites with efficient payment procedures (Harris & Goode 2010: 242). Website trust. 1Trust can be defined as customers' confidence in an organisation's reliability and integrity to refrain from opportunistic behaviour (Morgan & Hunt 1994: 20;.
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Improving customer generation by analysing website visitor behaviour
Ramlall, Shalini
2011-01-01
This dissertation describes the creation of a new integrated Information Technology (IT) system that assisted in the collection of data about the behaviour of website visitors as well as sales and marketing data for those visitors who turned into customers. A key contribution to knowledge was the creation of a method to predict the outcome of visits to a website from visitors’ browsing behaviour. A new Online Tracking Module (OTM) was created that monitored visitors’ behaviour while they brow...
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Website Quality to Increase Franchise Marketing Performance Excellence
Erwin Halim; Yohannes Kurniawan
2016-01-01
According to Indonesia Association of Service Provider (APJII) survey in 2014, the internet user in Indonesia increased up to around 88 million. This number expresses that the use of the internet to seek business franchise information will increase as well. The increase of internet using should be followed by the quality of franchisor's website. The franchisor's website will relate to system quality, information quality and service quality (DeLone and McLean, 2003). This research uses S...
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User Experience Design (UX Design) in a Website Development : Website redesign
Orlova, Mariia
2016-01-01
The purpose of the study was to implement an approach of user experience for a website design. Mostly, I concentrated on revealing and understanding the concepts of UX design which include usability, visual design and human factors affecting the user experience. Another aim of the study was to investigate people’s behaviour related to web design. The thesis based on a project. The project was to redesign an existing web design for a company called Positive Communications. They provide differe...