Search results for " 7"

Fixed angle inverse scattering for sound speeds close to constant

2021

We study the fixed angle inverse scattering problem of determining a sound speed from scattering measurements corresponding to a single incident wave. The main result shows that a sound speed close to constant can be stably determined by just one measurement. Our method is based on studying the linearized problem, which turns out to be related to the acoustic problem in photoacoustic imaging. We adapt the modified time-reversal method from [P. Stefanov and G. Uhlmann, Thermoacoustic tomography with variable sound speed, Inverse Problems 25 (2009), 075011] to solve the linearized problem in a stable way, and use this to give a local uniqueness result for the nonlinear inverse problem.

Towards nonlocal density functionals by explicit modelling of the exchange-correlation hole in inhomogeneous systems

2013

We put forward new approach for the development of a non-local density functional by a direct modeling of the shape of exchange-correlation (xc) hole in inhomogeneous systems. The functional is aimed at giving an accurate xc-energy and an accurate corresponding xc-potential even in difficult near-degeneracy situations such as molecular bond breaking. In particular we demand that: (1) the xc hole properly contains -1 electron, (2) the xc-potential has the asymptotic -1/r behavior outside finite systems and (3) the xc-potential has the correct step structure related to the derivative discontinuities of the xc-energy functional. None of the currently existing functionals satisfies all these re…

A qualitative fallacy: Life trapped in interpretations and stories

2021

This paper points out some problematic aspects of qualitative research based on interviews and uses examples from mental health. The narrative approach is explored while inquiring if the reality of life here is forced into the formula of a chronological story. The hermeneutic approach, in general, is also examined, and we ask if the reality of life in this scenario becomes caught up in a web of interpretations. Inspired by ideas from Bakhtin and phenomenology, we argue for interview-based research that stays with unresolvedness and constantly question the web of interpretations and narratives that determine our experiences. This also chimes with certain dialogical practices in mental healt…

Doubt, Hope, Pain, and New Discoveries: Parents’ Experiences of the High‐Conflict Program ‘No Kids in the Middle’

2021

A systematic review of handheld tools in lieu of colposcopy for cervical neoplasia and female genital schistosomiasis

2020

Abstract Background Visualization of the lesions in the lower genital tract is the mainstay for diagnosis of the four lesions found in female genital schistosomiasis (FGS), but colposcopes are generally not available in low‐resource settings. Objective We sought to review handheld devices that could potentially be used for FGS diagnosis. Search strategy We searched Medline and Embase 2015–2019 for handheld devices used in cervical cancer screening and FGS diagnosis. Selection criteria We excluded studies that did not compare the device to standard‐of‐care colposcopes or histopathology. Main results and conclusion In 11 studies, four handheld colposcopes, two smartphones, and one compact dig…

Gynaecological cancer patients` experience with sexual counselling : A qualitative metasynthesis

2018

Master's thesis Clinical health sciences ME520 - University of Agder 2018 Background: Changes to sexuality can be one of the most difficult aspects of life following treatment for gynaecologic cancer. It is important to address gynaecological cancer survivors need for counselling on this matter and find out more on how they experience sexual counselling. Aim: The purpose of this study is to explore gynaecological cancer patients` experience with sexual counselling. Methods: Inspired by Sandelowski and Barroso a qualitative metasynthesis was conducted, based on a systematic literature search in CINAHL (EBSCO Host), MEDLINE (OvidSP) and Psycinfo (Ovid SP) during September 2017. The findings w…

El trono de plata de la imagen original de la Virgen de los Desamparados (1738-1742)

2013

"Sipensamos en espacios de perpetración, no hay nada comparable al Valle de los Caídos". Conversación con Francisco Ferrándiz

2021

Platonis Opera

1517

Sig. [ ]6, a-z8, &8, [cum]8, [rum]8, A-Y8, Z6 Els grav. xil., son figures geomètriques i esquemes. - Una capital grav. Port. amb tinta roja. - Text amb postil·les marginals, algunes en grec. - Reclams. - Registre. - Els f. CXXI-CXXXVI numerats 167-174, 172-179. - Minúscules per a inicials

Observation of Photon Polarization in theb→sγTransition

2014

This Letter presents a study of the flavor-changing neutral current radiative $B^{\pm} \to K^{\pm}\pi^{\mp}\pi^{\pm}\gamma$ decays performed using data collected in proton-proton collisions with the LHCb detector at $7$ and $8\,$TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of $3\,\text{fb}^{-1}$, nearly $14\,000$ signal events are reconstructed and selected, containing all possible intermediate resonances with a $K^{\pm}\pi^{\mp}\pi^{\pm}$ final state in the $[1.1, 1.9]\,$GeV/$c^{2}$ mass range. The distribution of the angle of the photon direction with respect to the plane defined by the final-state hadrons in their rest frame is studied in interva…