130,842 research outputs found
Limit on the production of a light vector gauge boson in φ meson decays with KLOE detector
No full textPrecision measurement of σ(e+e- → π+π-γ)/σ(e+e- → μ+μ-γ) and determination of the π+π- contribution to the muon anomaly with the KLOE detector
No full textMeasurement of η meson production in γγ interactions and Γ(η→γγ) with the KLOE detector
No full text"We present a measurement of η meson production in photon-photon interactions produced by electron-positron beams colliding with s√=1 GeV. The measurement is done with the KLOE detector at the φ-factory DAΦNE with an integrated luminosity of 0.24 fb−1. The e + e − → e + e − η cross section is measured without detecting the out-going electron and positron, selecting the decays η → π + π − π 0 and η → π 0 π 0 π 0. The most relevant background is due to e + e − → ηγ when the monochromatic photon escapes detection. The cross section for this process is measured as σ(e + e − → ηγ) = (856 ± 8stat ± 16syst) pb. The combined result for the e + e − → e + e − η cross section is σ(e + e − → e + e − η) = (32.72 ± 1.27stat ± 0.70syst) pb. From this we derive the partial width Γ(η → γγ) = (520 ± 20stat ± 13syst) eV. This is in agreement with the world average and is the most precise measurement to date.
The Humbert-Bessel Functions, Stirling Numbers and Probability Distributions in Coincidence Problems
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Developing Evidence-Based Behavioral Intervention Strategies Through Teacher Induction
No full textPreventing and responding to student misbehavior is an integral part of classroom management and one of the most important skills an educator can have. Despite its importance, many educators receive inadequate training in this area. Many leave their pre-service training lacking confidence in addressing behavior and do not receive training once hired into the field.
An educator’s inability to effectively prevent and respond to student misbehavior negatively affects student success and contributes to professional burnout. Lack of effective classroom management can also escalate into more aggressive behavior. These aggressive behaviors often result in missed instructional time for students and further disenfranchisement from the school. Exclusionary discipline practices continue to be applied inequitably to students from marginalized communities further contributing to inequities that exist outside of the school setting. Additionally, the other students in the school experience elevated levels of disruption to the learning environment which contributes to teachers feeling frustrated and inadequate. Those feelings of frustration and inadequacy may manifest as burnout and decreased job satisfaction.
The aim of this study was to analyze the effectiveness of a formal training program on the acquisition and application of evidence-based strategies for preventing and responding to student misbehavior. The content was delivered as part of the teacher induction process and was obtained from the Kansas Technical Assistance System. The information was based on the stages of behavior escalation established by Dr. Geoff Colvin and Dr. George Sugai (2005). The objective of the training was to help educators develop strategies to prevent and respond to misbehavior through an understanding of the seven stages of the escalation cycle.
The participants included fifteen educators who worked in a mid-Atlantic, suburban, middle school. They completed ten training modules that included self-paced videos and reflections and attended ten training sessions. Participants completed surveys at the beginning, middle, and end of the training and were assessed at the midpoint and conclusion. The analysis of the surveys and assessments indicate that the training resulted in more frequent use of evidence-based preventative measures and responses to misbehavior along with an appreciation of the practicality of the training
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Deuteron photo-disintegration with polarised photons in the energy range 30-50 MeV
No full textThe reaction d(<(gamma)over right arrow>, np) has been studied using the tagged and polarised LADON gamma ray beam at an energy 30-50 MeV to investigate the existence of narrow dibaryonic resonances recently suggested from the experimental measurements in a different laboratory. The beam was obtained by Compton back-scattering of laser light on the electrons of the storage ring ADONE. Photo-neutron yields were measured at five neutron angle nu(n)(c.m.) = 22 degrees, 55.5 degrees, 90 degrees, 125 degrees and 157 degrees in the center of mass system. Our results do not support the existence of such resonances. (C) 1998 Published by Elsevier Science B.V
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