431 research outputs found
The Kindergarten Journal, Vol.1 No.3
Autumn 1910 issue of the quarterly journal. Includes Elizabeth Harrison\u27s report on the 14th annual meeting of the National Congress of Mothers (page 95), an editorial by Elizabeth Harrison titled The Kindergarten (page 105) and an editorial titled The Futurity of College by Mrs. J.N. Crouse, co-principal of the Chicago Kindergarten College.
Journal editors: Mrs. Todd Lunsford, Mrs. Florence Capronhttps://digitalcommons.nl.edu/harrison-writings/1028/thumbnail.jp
The Kindergarten Journal, Summer 1910
Includes the essay, The Value of Character , by Elizabeth Harrison (page 28), Personal Mention (page 20) and Alumnae Report (page 29) by Edna Dean Baker, and Extension (page 25) by J.N. Crouse, co-principal of the Chicago Kindergarten College.
Journal editors: Mrs. Todd Lunsford and Mrs. Florence Capronhttps://digitalcommons.nl.edu/harrison-writings/1029/thumbnail.jp
Energy Independent Solution to the Solar Neutrino Anomaly including the SNO data
The global data on solar neutrino rates and spectrum, including the SNO
charged current rate, can be explained by LMA, LOW or the energy independent
solution -- corresponding to near-maximal mixing. All the three favour a mild
upward renormalisation of the Cl rate. A mild downward shift of the
neutrino flux is favoured by the energy independent and to a lesser extent the
LOW solution, but not by LMA. Comparison with the ratio of SK elastic and SNO
charged current scattering rates favours the LMA over the other two solutions,
but by no more than .Comment: 18 pages, latex, 3 figure
Semantic categories underlying the meaning of âplaceâ
This paper analyses the semantics of natural language expressions that are associated with the intuitive notion of âplaceâ. We note that the nature of such terms is highly contested, and suggest that this arises from two main considerations: 1) there are a number of logically
distinct categories of place expression, which are not always clearly distinguished in discourse about âplaceâ; 2) the many non-substantive place count nouns (such as âplaceâ, âregionâ, âareaâ, etc.) employed in natural
language are highly ambiguous. With respect to consideration 1), we propose that place-related expressions
should be classified into the following distinct logical types: a) âplace-likeâ count nouns (further subdivided into abstract, spatial and substantive varieties), b) proper names of âplace-likeâ objects, c) locative property phrases, and d) definite descriptions of âplace-likeâ objects. We outline possible formal representations for each of these. To address consideration 2), we examine meanings, connotations and ambiguities of the English vocabulary of abstract and generic place count nouns, and identify underlying elements of meaning, which explain both
similarities and differences in the sense and usage of the various terms
A SUSY SU(5) Grand Unified Model of Tri-Bimaximal Mixing from A4
We discuss a grand unified model based on SUSY SU(5) in extra dimensions and
on the flavour group A4xU(1) which, besides reproducing tri-bimaximal mixing
for neutrinos with the accuracy required by the data, also leads to a natural
description of the observed pattern of quark masses and mixings.Comment: 19 page
Neutrino Masses with "Zero Sum" Condition:
It is well known that the neutrino mass matrix contains more parameters than
experimentalists can hope to measure in the foreseeable future even if we
impose CP invariance. Thus, various authors have proposed ansatzes to restrict
the form of the neutrino mass matrix further. Here we propose that ; this ``zero sum'' condition can occur in certain
class of models, such as models whose neutrino mass matrix can be expressed as
commutator of two matrices. With this condition, the absolute neutrino mass can
be obtained in terms of the mass-squared differences. When combined with the
accumulated experimental data this condition predicts two types of mass
hierarchies, with one of them characterized by eV, and the other by eV and eV. The mass ranges
predicted is just below the cosmological upper bound of 0.23 eV from recent
WMAP data and can be probed in the near future. We also point out some
implications for direct laboratory measurement of neutrino masses, and the
neutrino mass matrix.Comment: Latex 12 pages. No figures. New references adde
Experiences of Safety-Net Practice Clinicians Participating in the National Health Service Corps During the COVID-19 Pandemic
Objectives: The impact of the COVID-19 pandemic has been particularly harsh for low-income and racial and ethnic minority communities. It is not known how the pandemic has affected clinicians who provide care to these communities through safety-net practices, including clinicians participating in the National Health Service Corps (NHSC). Methods: In late 2020, we surveyed clinicians who were serving in the NHSC as of July 1, 2020, in 20 states. Clinicians reported on work and job changes and their current well-being, among other measures. Analyses adjusted for differences in subgroup response rates and clustering of clinicians within practices. Results: Of 4263 surveyed clinicians, 1890 (44.3%) responded. Work for most NHSC clinicians was affected by the pandemic, including 64.5% whose office visit numbers fell by half and 62.5% for whom most visits occurred virtually. Fewer experienced changes in their jobs; for example, only 14.9% had been furloughed. Three-quarters (76.6%) of these NHSC clinicians scored in at-risk levels for their well-being. Compared with primary care and behavioral health clinicians, dental clinicians much more often had been furloughed and had their practices close temporarily. Conclusions: The pandemic has disrupted the work, jobs, and mental health of NHSC clinicians in ways similar to its reported effects on outpatient clinicians generally. Because cliniciansâ mental health worsens after a pandemic, which leads to patient disengagement and job turnover, national programs and policies should help safety-net practices build cultures that support and give greater priority to cliniciansâ work, job, and mental health needs now and before the next pandemic
Governing processes for reactive nitrogen compounds in the atmosphere in relation to ecosystem climatic and human health impacts
Reactive nitrogen (Nr) compounds have different fates in the atmosphere due to differences in governing processes of physical transport, deposition and chemical transformation. Nr compounds addressed here include reduced nitrogen (NHx: ammonia (NH3) and its reaction product ammonium (NH4+)), oxidized nitrogen (NOy: nitrogen monoxide (NO) + nitrogen dioxide (NO2) and their reaction products) as well as organic nitrogen compounds (organic N). Pollution abatement strategies need to take into account these differences in the governing processes of these compounds when assessing their impact on ecosystem services, biodiversity, human health and climate. NOx (NO + NO2) emitted from traffic affects human health in urban areas where the presence of buildings increases the residence time in streets. In urban areas this leads to enhanced exposure of the population to NOx concentrations. NOx emissions have little impact on nearby ecosystems because of the small dry deposition rates of NOx. These compounds need to be converted into nitric acid (HNO3) before removal through deposition is efficient. HNO3 sticks quickly to any surface and is thereby either dry deposited or incorporated into aerosols as nitrate (NO3â). In contrast to NOx compounds, NH3 has potentially high impacts on ecosystems near the main agricultural sources of NH3 because of its large ground-level concentrations along with large dry deposition rates. Aerosol phase NH4+ and NO3â contribute significantly to background PM2.5 and PM10 (mass of aerosols with a diameter of less than 2.5 and 10 ÎŒm, respectively) with an impact on radiation balance as well as potentially on human health. Little is known quantitatively and qualitatively about organic N in the atmosphere, other than that it contributes a significant fraction of wet-deposited N, and is present in both gaseous and particulate forms in the atmosphere. Further studies are needed to characterize the sources, air chemistry and removal rates of organic N emissions
Deviation of Atmospheric Mixing from Maximal and Structure in the Leptonic Flavor Sector
I attempt to quantify how far from maximal one should expect the atmospheric
mixing angle to be given a neutrino mass-matrix that leads, at zeroth order, to
a nu_3 mass-eigenstate that is 0% nu_e, 50% nu_mu, and 50% nu_tau. This is done
by assuming that the solar mass-squared difference is induced by an
"anarchical" first order perturbation, an approach than can naturally lead to
experimentally allowed values for all oscillation parameters. In particular,
both |cos 2theta_atm| (the measure for the deviation of atmospheric mixing from
maximal) and |U_e3| are of order sqrt(Delta m^2_sol/Delta m^2_atm) in the case
of a normal neutrino mass-hierarchy, or of order Delta m^2_sol/Delta m^2_atm in
the case of an inverted one. Hence, if any of the textures analyzed here has
anything to do with reality, next-generation neutrino experiments can see a
nonzero cos 2theta_atm in the case of a normal mass-hierarchy, while in the
case of an inverted mass-hierarchy only neutrino factories should be able to
see a deviation of sin^2 2theta_atm from 1.Comment: 12 pages, no figures, references and acknowledgments adde
Extrinsic CPT Violation in Neutrino Oscillations in Matter
We investigate matter-induced (or extrinsic) CPT violation effects in
neutrino oscillations in matter. Especially, we present approximate analytical
formulas for the CPT-violating probability differences for three flavor
neutrino oscillations in matter with an arbitrary matter density profile. Note
that we assume that the CPT invariance theorem holds, which means that the CPT
violation effects arise entirely because of the presence of matter. As special
cases of matter density profiles, we consider constant and step-function matter
density profiles, which are relevant for neutrino oscillation physics in
accelerator and reactor long baseline experiments as well as neutrino
factories. Finally, the implications of extrinsic CPT violation on neutrino
oscillations in matter for several past, present, and future long baseline
experiments are estimated.Comment: 47 pages, 7 figures, RevTeX4. Final version to be published in Phys.
Rev.
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