120,010 research outputs found

    Resilience in Adolescents Who Survived a Suicide Attempt from the Perspective of Registered Nurses in Inpatient Psychiatric Facilities

    Get PDF
    The number of deaths by suicide has increased over the last few years. The purpose of this qualitative study is to explore components of resilience in adolescents who survived a suicide attempt from the perspective of nine psychiatric nurses. Resilience was used as a guiding conceptual framework which proposes that resilience is the interplay between risk and protective factors. Three categories emerged including risk factors, protective factors, and future recommendations of suicide prevention strategies. The perspectives gained from this study will help develop nursing interventions for adolescents to overcome risk factors and to build on their protective factors

    Risk and Protective Factors in the Lives of Caregivers of Persons With Autism: Caregivers’ Perspectives

    Get PDF
    PURPOSE The purpose of this descriptive exploratory study is to understand the experience of being a caregiver of a person with autism spectrum disorder (ASD) in the light of the resilience theory. METHODS Qualitative data were collected as a part of a larger quantitative study. Ninety-three caregivers completed this qualitative study and responded to the two open-ended questions. In the parent study, subjects were recruited by convenience sampling from the Interactive ASD Network (IAN). FINDINGS The identified categories appeared to reflect three distinct categories consistent with the resilience theory, labeled as follows: risk factors, protective factors, and overlapping factors. PRACTICE IMPLICATIONS These findings help to inform the planning of tailored interventions to enhance caregivers’ resilience

    Channeled propagation of solar particles

    Get PDF
    Bartley (1966) and McCracken and Ness (1966) identified bundles of interplanetary magnetic field (IMF) lines that differed in direction from the interplanetary field lines in which they were imbedded. These bundles, called filaments differed in direction by as much as several tens of degrees from the surrounding field. The filaments werre first noticed due to the large and sudden change in flow direction of highly anisotropic solar flare protons in the energy range 1 to 13 MeV. Passage of the filaments over the spacecraft required a few hours, implying a diameter for the filaments of approximately 3 x 10 to the 6th power km at a distance of 1 AU from the Sun. In 1968, Jakipii and Parker used Leighton's hypothesis of random walk of magnetic field lines associated with granules and supergranules (1964) to develop a picture of an interplanetary medium composed of a tangle of field lines frozen into the solar wind, but whose feet were carried about by the random motions at the solar surface. Jakipii and Parker noted that using a correlation length of 15,000 km - about the radius of a supergranule - the magnetic structure would be 3 x 10 to the 6th power km in size of the filaments as determined by Bartley and McCracken and Ness. These workers did not find changes in the solar particle intensity, anisotropy ratio or energy spectrum as the spacecraft entered the filament

    Atomic-phase interference devices based on ring-shaped Bose-Einstein condensates: Two ring case

    Full text link
    We theoretically investigate the ground-state properties and quantum dynamics of a pair of adjacent ring-shaped Bose-Einstein condensates that are coupled via tunneling. This device, which is the analogue of a symmetric superconducting quantum interference device, is the simplest version of what we term an Atomic-Phase Interference Device (APHID). The two-ring APHID is shown to be sensitive to rotation.Comment: 8 page

    Particle propagation channels in the solar wind

    Get PDF
    The intensities of low energy solar-interplanetary electrons and ions at 1 AU occasionally change in a square wave manner. The changes may be increases or decreases and they typically have durations of from one hour to a few hours. In some cases these channels are bounded by discontinuities in the interplanetary field and the plasma properties differ from the surrounding solar wind. In one case solar flare particles were confined to a channel of width 3 x 10 to the 6th km at Earth. At the Sun this dimension extrapolates to about 12,000 km, a size comparable to small flares

    A computerized symbolic integration technique for development of triangular and quadrilateral composite shallow-shell finite elements

    Get PDF
    Computerized symbolic integration was used in conjunction with group-theoretic techniques to obtain analytic expressions for the stiffness, geometric stiffness, consistent mass, and consistent load matrices of composite shallow shell structural elements. The elements are shear flexible and have variable curvature. A stiffness (displacement) formulation was used with the fundamental unknowns consisting of both the displacement and rotation components of the reference surface of the shell. The triangular elements have six and ten nodes; the quadrilateral elements have four and eight nodes and can have internal degrees of freedom associated with displacement modes which vanish along the edges of the element (bubble modes). The stiffness, geometric stiffness, consistent mass, and consistent load coefficients are expressed as linear combinations of integrals (over the element domain) whose integrands are products of shape functions and their derivatives. The evaluation of the elemental matrices is divided into two separate problems - determination of the coefficients in the linear combination and evaluation of the integrals. The integrals are performed symbolically by using the symbolic-and-algebraic-manipulation language MACSYMA. The efficiency of using symbolic integration in the element development is demonstrated by comparing the number of floating-point arithmetic operations required in this approach with those required by a commonly used numerical quadrature technique

    Borel singularities at small x

    Get PDF
    D.I.S. at small Bjorken xx is considered within the dipole cascade formalism. The running coupling in impact parameter space is introduced in order to parametrize effects that arise from emission of large size dipoles. This results in a new evolution equation for the dipole cascade. Strong coupling effects are analyzed after transforming the evolution equation in Borel (bb) space. The Borel singularities of the solution are discussed first for the universal part of the dipole cascade and then for the specific process of D.I.S. at small xx. In the latter case the leading infrared renormalon is at b=1/β0b=1/\beta_0 indicating the presence of 1/Q21/Q^2 power corrections for the small-xx structure functions.Comment: 5 pages, Latex (Talk presented at DIS'97, Chicago, IL
    • …
    corecore