2,664 research outputs found
Impact of coupling an ocean model to WRF nor’easter simulations
No full textThe impact of ocean-atmosphere coupling and its possible seasonal dependence upon Weather Research and Forecasting (WRF) model simulations of seven, winter-time cyclone events was investigated. Model simulations were identical aside from the degree of ocean model coupling (static SSTs, 1D mixed-layer model, full-physics 3D ocean model). Both 1D and 3D ocean model coupling simulations show that SSTs following the passage of a nor’easter did tend to cool more strongly during the early season (Oct-Dec) and were more likely to warm late in the season (Feb-Apr). Model simulations produce SST differences of up to 1.14 K, but this change did not lead to significant change in storm track ( 1) and have low-to-moderate threat scores (0.31 – 0.59). Analysis of the storm environment and the overall simulation failed to reveal any statistically significant differences in model error attributable to ocean-atmosphere coupling. Despite this result, ocean model coupling can reduce dynamical field error at a single level by up to 20%, and this was slightly greater (1-2%) with 3D ocean model coupling as compared to 1D ocean model coupling. Thus, while 3D ocean model coupling tended to generally produce more realistic simulations, its impact would likely be more profound for longer-term simulations.© Copyright 2015 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or [email protected] reviewe
Impact of Coupling an Ocean Model to WRF Nor’easter Simulations
No full textThe impact of ocean–atmosphere coupling and its possible seasonal dependence upon Weather Research and Forecasting (WRF) Model simulations of seven, wintertime cyclone events was investigated. Model simulations were identical aside from the degree of ocean model coupling (static SSTs, 1D mixed layer model, full-physics 3D ocean model). Both 1D and 3D ocean model coupling simulations show that SSTs following the passage of a nor’easter did tend to cool more strongly during the early season (October–December) and were more likely to warm late in the season (February–April). Model simulations produce SST differences of up to 1.14 K, but this change did not lead to significant changes in storm track ( 1) and have low-to-moderate threat scores (0.31–0.59). Analysis of the storm environment and the overall simulation failed to reveal any statistically significant differences in model error attributable to ocean–atmosphere coupling. Despite this result, ocean model coupling can reduce dynamical field error at a single level by up to 20%, and this was slightly greater (1%–2%) with 3D ocean model coupling as compared to 1D ocean model coupling. Thus, while 3D ocean model coupling tended to generally produce more realistic simulations, its impact would likely be more profound for longer-term simulations.© Copyright 2015 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or [email protected] reviewe
"The Translingual Sensibility: A Conversation Between Steven G. Kellman and Ilan Stavans"
No full textDialogue might be the most appropriate medium for reflections on translingualism. In a dialogue conducted by email over the course of ten days, Steven G. Kellman and Ilan Stavans consider the validity and implications of linguistic determinism. Their conversation examines whether some words that seem to embody the unique Weltanschaaung of a particular culture – such as Schadenfreude, duende, or mångata – can be appropriated, if not translated, into another culture. Pondering whether there are any inherent qualities that distinguish texts by monolingual writers such as Jane Austen and William Faulkner from work by authors who switch languages, such as Samuel Beckett and Vladimir Nabokov, they agree on the usefulness of thinking in terms of a translingual sensibility. Apart from the biographical circumstances of the author, a text possesses a translingual sensibility if it embodies an awareness of both the power and the limitations of its own verbal medium
A Cross-Layer Multicast-Push Unicast-Pull (MPUP) Architecture for Reliable File-Stream Distribution
No full textThe growing deployment of OpenFlow/SDN networks makes it increasingly possible to leverage network multi-cast services. This work proposes a novel cross-layer Multicast- Push Unicast Pull (MPUP) architecture that includes functionality in the application, transport and link layers to offer users a reliable file-stream distribution service to multiple subscribers. A prototype implementation of the MPUP architecture was realized in a new version of Local Data Manager (LDM), LDM7, a software program that has been in use since 1994 for real-time meteorology data distribution. LDM6, the currently deployed version, uses application-layer multicast. Experiment were run on the GENI infrastructure to compare LDM7 and LDM6. The two main findings are (i) LDM7 can be run at a higher sending rate than LDM6 allowing for improved performance (lower file-delivery latency), and (ii) to achieve the same performance, LDM7 uses significantly lower bandwidth and compute capacity. A three-fold improvement in performance improvement was possible with LDM7, and a bandwidth reduction from 350 Mbps to 21.4 Mbps was observed with 24 receivers.Peer reviewe
WISE Workshops : Foundations for Collaborative Cyber Security Learning: Exploring Educator and Learner Requirements ; Reimaging Inclusive Pedagogy in Cybersecurity Education (A Workshop Proposal)
No full textBackmatter - WISE Workshop.Foundations for Collaborative Cyber Security Learning: Exploring Educator and Learner Requirements, Jerry Andriessen, Steven Furnell, Gregor Langner, Gerald Quirchmayr, Vittorio Scarno, Teemu Tokola.Reimaging Inclusive Pedagogy in Cybersecurity Education (A Workshop Proposal), Angela G. Jackson-Summers.International audienceThis brief paper outlines the background to a workshop session at the 14th World Conference on Information Security Education (WISE 14), drawing upon early findings from the Collaborative Cybersecurity Awareness Learning (COLTRANE) project funded under the European Union ERASMUS + programme. It presents the background to the COLTRANE project and an outline of the workshop focus. The latter is based upon an investigation of current cyber security education delivery that has been conducted amongst existing educators and learners via prior survey-based data collection and follow-up workshop discussions within individual COLTRANE partner countries
Author Correction: Identification of functional tetramolecular RNA G-quadruplexes derived from transfer RNAs
No full textThe original version of this Article contained an error in the spelling of the author Steven M. Coyne, which was incorrectly given as Stephen M. Coyne. This has now been corrected in both the PDF and HTML versions of the Article.</jats:p
Personal-level factors and Google Docs use in Monmouth County middle schools
No full textTechnology is essential in both personal and professional lives. Also, digital assessments, such as those being implemented as part of the Partnership for Assessment of Readiness for College and Careers (PARCC), will soon be instituted; these require students to utilize computer technology in order to complete the assessment. Therefore, it is imperative that administrators be aware of factors associated with increased frequency and complexity of technology use in teachers’ classrooms. This study examined the factors associated with the diffusion and implementation of a technological innovation (Google Docs) through schools/districts in Monmouth County, NJ. An online survey provided quantitative data about teachers’ personal-professional characteristics and the frequency and complexity of respondents’ uses of Google Docs. Data was collected from 35 of the 53 schools in Monmouth County; 45% of the surveyed population provided viable responses. Linear regression determined which factors had a statistically significant association with the dependent variable “Google Docs Usage Score” (GDUS), a measure of frequency and complexity of Google Docs use. Independent variables culled from the literature were decision method (optional, collective, or authority); innovator type (innovator, early adopter, early majority, late majority, laggard); and the following personal characteristics: years of teaching experience; subject area taught; grade levels taught; number of types of technology used personally; number of types of technology used professionally; and technological, pedagogical, and content knowledge (TPACK) score (Mishra & Koehler, 2003). This study determined there was a statistically significant association between the GDUS and the following variables: optional decision method; innovator, early adopter, and early majority innovator types; the subject areas Mathematics and Visual and/or Performing Arts; the number of types of technology used professionally; and TPACK score. These findings provide administrators with specific factors to consider when encouraging diffusion of a technological innovation such as Google Docs into a school. Combined with research by Wisnicki (2014), it was found that personal factors have a larger impact on GDUS than do environmental factors. This study builds on the diffusion work of Rogers (2003) and the Concerns-Based Adoption Model of Hall, Wallace, & Dosset (1973), and adds clarity to the literature on diffusion of educational technology within schools. This study also provides a new theoretical construct for examining levels of use of Google Docs, which could potentially be expanded to act as a measurement for other types of educational technology.Ed. D.Includes bibliographical referencesby Steven G. Tetreaul
Aging and Housing Equity: Another Look
No full textAside from Social Security and, for some, employer-provided pensions, housing equity is the principle asset of a large fraction of older Americans. Many retired persons have essentially no financial assets to support retirement consumption. We use data from the Health and Retirement Study (HRS), the Asset and Health Dynamics Among the Oldest Old (AHEAD), and the Survey of Income and Program Participation (SIPP) to understand the extent to which families use housing equity to support general consumption in retirement. The initial analysis is based on self-assessed home values reported by survey respondents. Because the self-assessments exaggerate actual home equity, much of the subsequent analysis is based on the selling price of recently sold homes, together with the reported equity in recently purchased homes. Homeowners can change home equity by either discontinuing ownership or by purchasing another home of lesser or greater value. We find that in the absence of a precipitating shock--death of a spouse or entry of a family member into a nursing home- -families are unlikely to discontinue home ownership. And even when there is a precipitating shock, discontinuing ownership is the exception rather than the rule. On average, families that move and purchase a new home tend to increase home equity. We find, however, that income-poor and house-rich families are more likely to reduce equity when they move, while house-poor and income-rich households are more likely to increase housing equity. Overall, accounting for discontinuing ownership and moving to another home, housing equity increases with age until about age 75 and then declines slightly as households grow older. The overall decline among older households (surveyed in the AHEAD) is about 1.76 percent per year, and this decline is largely accounted for by a 7.84 percent decline among households who experience a precipitating shock. Families that remain intact reduce housing equity very little, about 0.11 percent per year for two-person households and 1.15 percent per year for one- person households. We conclude that, on average, home equity is not liquidated to support general non-housing consumption needs as households age.
Book Review: Vulnerable Subjects: Ethics and Life Writing
No full textAuthor: G. Thomas Couser
Reviewer: Steven Brown
Publisher: (Ithaca: Cornell, 2004).
Cost: Paperback - 47.50
Paper, 2003 ISBN: 0-8014-8863-X 47.50
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