1,123 research outputs found

    Accounting for Citizenship: Are our expectations for civic education too modest?

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    In an era of tests and standards, how do our schools score in preparing citizens? Are any superintendents worrying about their jobs because of low civic scores on state assessments? There is no more central purpose to schools in a democracy than the preparation of citizens, yet you would hardly know it from how we hold these key public institutions accountable. Questions about the health of our civic life underlie many of today\u27s central campaign issues, from taxes to foreign policy. What sort of democracy are we, and what do we expect every citizen to be able to do

    Atlanta Symphony Orchestra, Peter & the Wolf and Friends

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    The Atlanta Symphoy Orchestra performs a special family program featuring Prokofiev’s classic children\u27s symphony, Peter and the Wolf, and other fun songs! Kids will learn about the instruments of the orchestra in this family-friendly performance and puppeteers will join the orchestra to bring the characters to life!https://digitalcommons.kennesaw.edu/musicprograms/1901/thumbnail.jp

    Body Language and Sales

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    Utilizing professional sales competition videos taken from a university Sales program, the current study investigates the link between nonverbal gestures made by salespeople and performance scores given by professional sales recruiters watching their role plays. The results of this study may suggest a relationship between gesture use and perceptions of sales ability

    Polarization transfer in e⃗+p→e+p⃗\vec{e}^+p \rightarrow e^+ \vec{p} scattering using the Super BigBite Spectrometer

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    The effects of multi-photon-exchange and other higher-order QED corrections on elastic electron-proton scattering have been a subject of high experimental and theoretical interest since the polarization transfer measurements of the proton electromagnetic form factor ratio GEp/GMpG_E^p/G_M^p at large momentum transfer Q2Q^2 conclusively established the strong decrease of this ratio with Q2Q^2 for Q2≳1Q^2 \gtrsim 1 GeV2^2. This result is incompatible with previous extractions of this quantity from cross section measurements using the Rosenbluth Separation technique. Much experimental attention has been focused on extracting the two-photon exchange (TPE) effect through the unpolarized e+p/e−pe^+p/e^-p cross section ratio, but polarization transfer in polarized elastic scattering can also reveal evidence of hard two-photon exchange. Furthermore, it has a different sensitivity to the generalized TPE form factors, meaning that measurements provide new information that cannot be gleaned from unpolarized scattering alone. Both ϵ\epsilon-dependence of polarization transfer at fixed Q2Q^2, and deviations between electron-proton and positron-proton scattering are key signatures of hard TPE. A polarized positron beam at Jefferson Lab would present a unique opportunity to make the first measurement of positron polarization transfer, and comparison with electron-scattering data would place valuable constraints on hard TPE. Here, we propose a measurement program in Hall A that combines the Super BigBite Spectrometer for measuring recoil proton polarization, with a non-magnetic calorimetric detector for triggering on elastically scattered positrons. Though the reduced beam current of the positron beam will restrict the kinematic reach, this measurement will have very small systematic uncertainties, making it a clean probe of TPE.Comment: 6 pages, 3 figures. Contribution to the EPJA topical issue, "An Experimental Program with Positron Beams at Jefferson Lab." arXiv admin note: substantial text overlap with arXiv:2007.15081, arXiv:1906.0941

    Rockfall Mitigation Measures

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    Highways in Kentucky contain numerous rock slopes and rockfall from these slopes represent potential dangers to motorists. As these highway rock cut slopes age and deteriorate because of weathering, the potential for rockfall and rock slides increases. Some bodily injuries and traffic fatalities have been reported in past years. The general aims of this study were to establish a highway rock cut slope policy and devise a statewide system of dealing with this problem. This study represents the start of an effort by the Kentucky Transportation Cabinet to develop a proactive stance and policy toward preventing, minimizing, or mitigating the rockfall problem on the Cabinet\u27s highways and to establish a rockfall risk management program. As this study shows, the vast majority of rockfall problems in Kentucky occur in counties located east of Interstate 75. Preliminary rockfall hazardous ratings of all rock cut slopes­ – some 5270 slopes – on the Interstates, Parkways, and most Primary routes were performed using the rockfall hazardous rating system (RHRS) devised by Pierson and Vickle of Oregon DOT. This approach appears to be a good system for rating the potential for rockfall at a given highway rock cut location. Some 180 slopes were identified as hazardous. Detailed numerical ratings were performed at those locations. Differential weathering and structural characteristics – jointing and unfavorable orientations – were the major causes of rockfall. Few mitigation measures have been used on Kentucky\u27s highways. For the sedimentary rock strata in Kentucky, benching of rock slopes appears to be very effective in preventing, or mitigating, rockfall on Kentucky\u27s highways. The rock cut slope design guidelines used by the Cabinet appear to be sound. The basic problem is not design standards, but the fact that many of the highway rock slopes are aging, weathering, and deteriorating. With aging, rockfall problems will continue to increase with time. The computer rockfall simulation program devised by Colorado engineers was used to analyze several case studies of rockfall. This program appears to a very good analytical tool for assessing the stability and safety of existing rock slopes and newly designed rock slopes and will be useful in devising remedial and mitigating plans at rockfall sites

    Synthesis of Cyclic Py-Im Polyamide Libraries

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    Cyclic Py-Im polyamides containing two GABA turn units exhibit enhanced DNA binding affinity, but extensive studies of their biological properties have been hindered due to synthetic inaccessibility. A facile modular approach toward cyclic polyamides has been developed via microwave-assisted solid-phase synthesis of hairpin amino acid oligomer intermediates followed by macrocyclization. A focused library of cyclic polyamides 1–7 targeted to the androgen response element (ARE) and the estrogen response element (ERE) were synthesized in 12–17% overall yield. The Fmoc protection strategy also allows for selective modifications on the GABA turn units that have been shown to improve cellular uptake properties. The DNA binding affinities of a library of cyclic polyamides were measured by DNA thermal denaturation assays and compared to the corresponding hairpin polyamides. Fluorescein-labeled cyclic polyamides have been synthesized and imaged via confocal microscopy in A549 and T47D cell lines. The IC_50 values of compounds 1–7 and 9–11 were determined, revealing remarkably varying levels of cytotoxicity

    The Enduring Appeal of Community Schools

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    Dataset for large-scale, lateral-torsional buckling tests of continuous beams in a grillage system

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    A number of large-scale tests of a grillage system are summarized and reduced data are provided. The tests were completed in association with a Louisiana Transportation Research Center (LTRC) project for the Louisiana Department of Transportation and Development (LA DOTD) whose goal was to better quantify behavior and limit states of steel bridge floor systems to refine longitudinal member (stringer) load- rating calculations. A number of tests focused on the behavior of the stringers resting on transverse members (a floorbeam), a system akin to a grillage. The system was proportioned with the expectation that stringer lateral-torsional buckling, a key steel bridge beam design and load-rating limit state, would occur. The provided dataset includes specimen descriptions and output from 58 tests. Investigated parameters included: stringer unbraced lengths; bracing types (i.e., bolted steel diaphragms versus clamped timber struts); load locations; and support conditions. Sample tests are described and reduced results summarized and presented

    Chemical Analysis and Nutrient Loading of Streams Entering Conesus Lake, N.Y with sections on I. Status of Conesus Lake I I. Crayfish as Control Agents of Macrophytes

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    A program of research was developed at the State University of New York at Brockport\u27s Department of Biological Sciences to investigate the causes of decreasing water transparency and increased salt levels in some streams draining into Conesus Lake and to identify watersheds and sources of. fertilizers that may be polluting the lake and causing increased abundance of weeds . It has been supported by New York State, Livingston County, the Villages of Avon and Geneseo and the Town of Livonia and many private citizens. The thrust of the research has been to gather and synthesize information necessary to determine the physical capabilities of Conesus Lake to maintain its aesthetic character, its use as a water supply, and its ability to continue to serve as the symbol of the region. Phase 1 started in 1985 with the goal to identify the causes of the decrease in water clearness or the increase in turbidity of the Lake water. The higher turbidity was of concern to the New York State Department of Health because turbidity for the first time was exceeding the New York State\u27s Guidelines on Drinking Water. The high turbidity may eventually require the construction of new water treatment plants. Results from this work suggest that the high turbidity was correlated with the accidental introduction of a new fish, the alewife or sawbelly, into the Lake. Detailed information was also gathered concerning the water quality of Conesus Lake to ascertain its status and fragility

    Lamb Wave Modes in Coal-Tar-Coated Steel Plates

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    In order to study the feasibility of using ultrasonic Lamb wave modes for detection and sizing of corrosion-related flaws in buried steel pipelines, we have calculated Lamb wave modes and performed numerous experiments on steel plates coated on one side with coal-tar enamel. The purpose of this paper is to discuss these theoretical and experimental results
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