1,395 research outputs found

    Consideration for care for your patient with cerebral palsy

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    Cerebral palsy (CP) is a common developmental neurological disorder affecting about 2-3 children out of 1,000. CP is the result of infant brain damage or abnormal development resulting in impaired muscle control, coordination, tone, reflex, posture, and balance. These patients are unable to control motor movements of their muscles of mastication and facial expression, causing excessive drooling, clenching, bruxism, and other oral health-related issues. This lack of motor control affects their ability to swallow and often limits these patients to a liquid diet. This can lead to vitamin deficiencies and result in further developmental problems. As an example, a deficiency in vitamin D may lead to osteoporosis, which manifests in the oral cavity as periodontal disease. Even into adulthood, these individuals are often reliant on the care of others. It becomes the caregiver’s responsibility to ensure the individual with cerebral palsy is receiving consistent and effective oral hygiene, and to monitor the oral tissues for signs of disease or injury. The researchers reviewed primary and secondary literature published after 2014 on the subjects of cerebral palsy, general health considerations, and oral care. The aim of this investigation focuses on unique issues faced by patients with cerebral palsy, and how to effectively educate caregivers on risks and proper techniques for providing oral hygiene to these individuals.https://scholarscompass.vcu.edu/denh_student/1001/thumbnail.jp

    An analysis of mathematics textbooks for grade eight

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    Thesis (Ed.M.)--Boston Universit

    Direct frequency comb measurements of absolute optical frequencies and population transfer dynamics

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    A phase-stabilized femtosecond laser comb is directly used for high-resolution spectroscopy and absolute optical frequency measurements of one- and two-photon transitions in laser-cooled \rb atoms. Absolute atomic transition frequencies, such as the 5S1/2_{1/2} F=2 \ra 7S1/2_{1/2} F"=2 two-photon resonance measured at 788 794 768 921(44) kHz, are determined without \textit{a priori} knowledge about their values. Detailed dynamics of population transfer driven by a sequence of pulses are uncovered and taken into account for the measurement of the 5P states via resonantly enhanced two-photon transitions.Comment: 5 pages, 4 figures, submitte

    Determinants of Weanling Thoroughbred Auction Prices

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    Determinants of prices of 1,302 weanling Thoroughbreds sold at the 2010 Keeneland November Breeding Stock Sale are investigated. A hedonic pricing model is adopted to identify price determinants, and the corresponding marginal values of those determinants are estimated. Prices were responsive to pedigree quality variables, including the sire\u27s stud fee, the stage of the sire\u27s breeding career, and whether the dam or the dam\u27s progeny had earned “black type.” In addition, individual weanling characteristics such as gender, age, state of birth, and sale placement influenced price. Results can be used as a decision tool by both buyers and sellers

    A Note on Venture Capital Networks: Promise and Performance

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    Since 1984 Informal Venture Networks (VCNs) have been formed and are currently operating in several states and Canada. However, little has been written in regard to the performance of these networks. This article presents the results of preliminary research concerning their performance. Our research reveals several factors that are presently limiting the VCNs’ success and will continue to do so until diey are changed. The limited success of the VCNs to date is primarily the result of a lack of funding. Because of small operating budgets, most VCNs have only minimal amounts available for marketing and promotion. Until the VCNs are adequately funded, their high promise will not be matched by performance

    Development, Validation, and Potential Enhancements to the Second-Generation Operational Aerosol Product at the National Environmental Satellite, Data, and Information Service of the National Oceanic and Atmospheric Administration

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    A revised (phase 2) single-channel algorithm for aerosol optical thickness, tau(sup A)(sub SAT), retrieval over oceans from radiances in channel 1 (0.63 microns) of the Advanced Very High Resolution Radiometer (AVHRR) has been implemented at the National Oceanic and Atmospheric Administration's National Environmental Satellite Data and Information Service for the NOAA 14 satellite launched December 30, 1994. It is based on careful validation of its operational predecessor (phase 1 algorithm), implemented for NOAA 14 in 1989. Both algorithms scale the upward satellite radiances in cloud-free conditions to aerosol optical thickness using an updated radiative transfer model of the ocean and atmosphere. Application of the phase 2 algorithm to three matchup Sun-photometer and satellite data sets, one with NOAA 9 in 1988 and two with NOAA 11 in 1989 and 1991, respectively, show systematic error is less than 10%, with a random error of sigma(sub tau) approx. equal 0.04. First results of tau(sup A)(sub SAT) retrievals from NOAA 14 using the phase 2 algorithm, and from checking its internal consistency, are presented. The potential two-channel (phase 3) algorithm for the retrieval of an aerosol size parameter, such as the Junge size distribution exponent, by adding either channel 2 (0.83 microns) from the current AVHRR instrument, or a 1.6-microns channel to be available on the Tropical Rainfall Measurement Mission and the NOAA-KLM satellites by 1997 is under investigation. The possibility of using this additional information in the retrieval of a more accurate estimate of aerosol optical thickness is being explored

    Prospects for precision measurements of atomic helium using direct frequency comb spectroscopy

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    We analyze several possibilities for precisely measuring electronic transitions in atomic helium by the direct use of phase-stabilized femtosecond frequency combs. Because the comb is self-calibrating and can be shifted into the ultraviolet spectral region via harmonic generation, it offers the prospect of greatly improved accuracy for UV and far-UV transitions. To take advantage of this accuracy an ultracold helium sample is needed. For measurements of the triplet spectrum a magneto-optical trap (MOT) can be used to cool and trap metastable 2^3S state atoms. We analyze schemes for measuring the two-photon 23S43S2^3S \to 4^3S interval, and for resonant two-photon excitation to high Rydberg states, 23S33Pn3S,D2^3S \to 3^3P \to n^3S,D. We also analyze experiments on the singlet-state spectrum. To accomplish this we propose schemes for producing and trapping ultracold helium in the 1^1S or 2^1S state via intercombination transitions. A particularly intriguing scenario is the possibility of measuring the 11S21S1^1S \to 2^1S transition with extremely high accuracy by use of two-photon excitation in a magic wavelength trap that operates identically for both states. We predict a ``triple magic wavelength'' at 412 nm that could facilitate numerous experiments on trapped helium atoms, because here the polarizabilities of the 1^1S, 2^1S and 2^3S states are all similar, small, and positive.Comment: Shortened slightly and reformatted for Eur. Phys. J.

    Light anti-nuclei production in pp collisions at s\sqrt{s}=7 and 14 TeV

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    A dynamically constrained coalescence model based on the phase space quantization and classical limit method was proposed to investigate the production of light nuclei (anti-nuclei) in non-single diffractive (NSD) pp collisions at s\sqrt{s}=7 and 14 TeV. This calculation was based on the final hadronic state in the PYTHIA and PACIAE model simulations, the event sample consisted of 1.2×108\times 10^8 events in both simulations. The PACIAE model calculated Dˉ\bar D yield of 6.247×105\times 10^{-5} in NSD pp collisions at s\sqrt{s}=7 TeV is well comparing with the ALICE rough datum of 5.456×105\times 10^{-5}. It indicated the reliability of proposed method in some extent. The yield, transverse momentum distribution, and rapidity distribution of the Dˉ\bar D, 3Heˉ^3{\bar{He}}, and Λˉ3Hˉ_{\bar\Lambda} ^3{\bar H} in NSD pp collisions at s\sqrt{s} =7 and 14 TeV were predicted by PACIAE and PYTHIA model simulations. The yield resulted from PACIAE model simulations is larger than the one from PYTHIA model. This might reflect the role played by the parton and hadron rescatterings.Comment: 5 pages, 2 figure
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