1,853 research outputs found

    PRIMARY HEALTH CARE FOR ETHNIC MINORITIES AT THE MEDICAL STATION OF DONG QUAN COMMUNE, LOC BINH DISTRICT, LANG SON PROVINCE

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    Primary health care is a very important part of the country's socio-economic development strategy, a fundamental factor to improve the quality of life of individuals, families and social festivals. In periods, commune, ward and township health stations (hereinafter collectively referred to as health stations) have always been identified as the foundation for performing primary health care for the people. The frontline is close to the people, bringing many benefits in terms of health management, disease prevention, early diagnosis of health problems, primary health care and appropriate referral for people when sick [1]. However, the reality shows that primary health care for ethnic minorities in mountainous areas still faces many difficulties and limitations. This article is the result of the author's research on the status of primary health care for ethnic minorities at the health station of Dong Quan commune, Loc Binh district, Lang Son province. The study was conducted to describe the current situation of primary health care for ethnic minorities in the health station and offer some solutions from the perspective of the social work sector. The data in this article are collected from primary and secondary sources

    Gyrotron Internal Mode Converter Reflector Shaping from Measured Field Intensity

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    Design of Correcting Mirrors for a Gyrotron Used at Large Helical Device

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    Experimental determination of the 6s^2 ^1S_0 -> 5d6s ^3 D_1 magnetic-dipole transition amplitude in atomic ytterbium

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    We report on a measurement of the highly forbidden 6s^2 ^1S_0 \to 5d6s ^3 D_1 magnetic-dipole transition in atomic ytterbium using the Stark-interference technique. This amplitude is important in interpreting a future parity nonconservation experiment that exploits the same transition. We find ∣∣ = 1.33(6)Stat(20)ÎČ×10−4ÎŒ0| | ~ = ~ 1.33(6)_{Stat}(20)_{\beta} \times 10^{-4} \mu_0, where the larger uncertainty comes from the previously measured vector transition polarizability ÎČ\beta. The M1M1 amplitude is small and should not limit the precision of the parity nonconservation experiment.Comment: 4 pages, 5 figures Paper resubmitted with minor corrections and additions based on comments from referee

    Resolution-dependent quark masses from meson correlators

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    We explore the impact of a resolution-dependent constituent quark mass, as recently applied to diffractive meson production, in QCD correlation functions of several spin-0 and spin-1 meson channels. We compare the resulting correlators with experimental and lattice data, analyze the virtues and limitations of the approach, and discuss the channel dependence of the obtained effective quark masses.Comment: 15 pages, 5 figures, to be published in Phys. Rev. C, reference adde

    Metric Properties of the Fuzzy Sphere

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    The fuzzy sphere, as a quantum metric space, carries a sequence of metrics which we describe in detail. We show that the Bloch coherent states, with these spectral distances, form a sequence of metric spaces that converge to the round sphere in the high-spin limit.Comment: Slightly shortened version, no major changes, two new references, version to appear on Letters in Mathematical Physic

    Direct Instantons in QCD Nucleon Sum Rules

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    We study the role of direct (i.e. small-scale) instantons in QCD correlation functions for the nucleon. They generate sizeable, nonperturbative corrections to the conventional operator product expansion, which improve the quality of both QCD nucleon sum rules and cure the long-standing stability problem, in particular, of the chirally odd sum-rule.Comment: 10 pages, UMD PP#93-17

    Parameter free calculation of hadronic masses from instantons

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    We propose a non-perturbative calculation scheme which is based on the semi-classical approximation of QCD and can be used to evaluate quantities of interest in hadronic physics. As a first application, we evaluate the mass of the pion and of the nucleon. Such masses are related to a particular combination of Green functions which, in some limit, is dominated by the contribution of \emph{very small-sized} instantons. The size distribution of these pseudo-particles is determined by the 't Hooft tunneling amplitude formula and therefore our calculation is free from any model parameters. We prove that instanton forces generate a light pion and a nucleon with realistic mass (Mn∌970MeVM_n \sim 970 MeV). In connection with sum-rules approaches, we discuss the overlap of instantons with pion and nucleon resonances

    Suppression of inhomogeneous broadening in rf spectroscopy of optically trapped atoms

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    We present a novel method for reducing the inhomogeneous frequency broadening in the hyperfine splitting of the ground state of optically trapped atoms. This reduction is achieved by the addition of a weak light field, spatially mode-matched with the trapping field and whose frequency is tuned in-between the two hyperfine levels. We experimentally demonstrate the new scheme with Rb 85 atoms, and report a 50-fold narrowing of the rf spectrum
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