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In this paper, physical limitations on bandwidth, realized gain, Q-factor and directivity are derived for antennas of arbitrary shape. The product of bandwidth and realizable gain is shown to be bounded from above by the eigenvalues of the long-wavelength, high-contrast polarizability dyadics. These dyadics are proportional to the antenna volume and are easily determined for an arbitrary geometry.
Artikeln diskuterar när, hur och varför engelska språket blev första främmande språk i den svenska realskolan på bekostnad av det tyska språket. Kulturdebatt, utredningsmaterial och riksdagstryck används för att visa på den komplexa frågans hantering.
Sweden was hit hard in the beginning of the COVID-19 pandemic with deaths per capita among the highest in Europe. The pandemic was a stressful time especially for healthcare workers caring for COVID-19 patients. Various studies have evaluated whether nurses caring for these patients had higher levels of acute stress, but typically with measures that either used older DSM-IV criteria for Acute Stre
This article explores the burgeoning Nepalese hip-hop scene – commonly known as nep-hop – as a discursive intervention in the post-war politics of Nepal. Its core argument is that nep-hop oftentimes demonstrates an ethos of peacebuilding through popular culture. Indeed, many songs explicitly criticize violence, war, and the political leaders who recently brought the nation to a civil war. Yet, thi
This chapter addresses the benefits of geo-statistical approaches in fire prevention processes, especially in the prevention of residential fires in urban areas. The aim is to demonstrate how residential fire incidents can be theorized and placed in a context where geo-statistical techniques and an area-based approach can support the emergency services fire prevention work. The chapter introduces
In this paper we consider the problem of relative pose estimation from two images with per-pixel polarimetric information. Using these additional measurements we derive a simple minimal solver for the essential matrix which only requires two point correspondences. The polarization constraints allow us to pointwise recover the 3D surface normal up to a two-fold ambiguity for the diffuse reflection.
BACKGROUND: It is unclear whether low-level viremia (LLV), defined as repeatedly detectable viral load (VL) of <200 copies/mL, and/or transient viremic episodes (blips) during antiretroviral therapy (ART), predict future virologic failure. We investigated the association between LLV, blips, and virologic failure (VF) in a multi-center European cohort.METHODS: People with HIV-1 who started ART 2005
Purpose: The available questionnaires for quality-of-life (QoL) assessments are age-group specific, limiting comparability and impeding longitudinal analyses. The comparability of measurements, however, is a necessary condition for gaining scientific evidence. To overcome this problem, we assessed the viability of harmonising data from paediatric and adult patient-reported outcome (PRO) measures.
Recent socioeconomic changes have created and intensified paradoxical organizational tensions that companies in numerous industries, including the construction sector, need to address when organizing and managing their activities. The nature of these tensions has not been sufficiently explored in the existing construction management literature. Thus, this study analyzes tensions between control an
PURPOSE: Proactive management of type 2 diabetes is important for restoring beta-cell function and improving sustained blood glucose control. Evidence on quality of diabetes care in Ethiopia is inadequate.METHOD: Facility-based cross-sectional study was conducted to assess level of quality of care provided to adult type 2 diabetes patients at three public hospitals in Gamo Gofa Zone, Southern Ethi
Key points• Obsessive-compulsive disorder is a disabling mental disorder with a lifetime prevalence of around 2% with similar rates across age groups and countries.• Diagnosis is made based on a pattern of time-consuming, clinically distressing, or impairing obsessions and compulsions and most cases emerge during puberty or early adulthood.• Obsessions are recurrent, persistent, and intrus
Cancer mortality is exacerbated by late-stage diagnosis. Liquid biopsies based on genomic biomarkers can noninvasively diagnose cancers. However, validation studies have reported ~10% sensitivity to detect stage I cancer in a screening population and specific types, such as brain or genitourinary tumors, remain undetectable. We investigated urine and plasma free glycosaminoglycan profiles (GAGomes
Recently the first example of a family of pro-p groups, for p a prime, with full normal Hausdorff spectrum was constructed. In this paper we further investigate this family by computing their finitely generated Hausdorff spectrum with respect to each of the five standard filtration series: the p-power series, the iterated p-power series, the lower p-series, the Frattini series and the dimension su
ConspectusBy combining results and analysis from cylindrical microjet photoelectron spectroscopy (cMJ-PES) and theoretical simulations, we unravel the microscopic properties of ethanol-water solutions with respect to structure and intermolecular bonding patterns following the full concentration scale from 0 to 100% ethanol content. In particular, we highlight the salient differences between bulk a
