This article presents a study of transmission through arrays of periodic sub-wavelength apertures. Fundamental limitations for this phenomenon are formulated as a sum rule, relating the transmission coefficient over a bandwidth to the static polarizability. The sum rule is rigorously derived for arbitrary periodic apertures in thin screens. By this sum rule we establish a physical bound on the tra

Purpose: This paper aims to show how continued failure for tourism to address its global impacts is likely to imply the end of tourism as we know it. Design/methodology/approach: This paper is an opinion piece that discusses tourism out of the global situation in spring 2019. Findings: Tourism is about to undermine its own future, largely as a failure of UNWTO and ICAO to address environmental cha

In order to observe a patent application at the firm level, two conditions need to be met: new products need to be of patentable quality, which depends both on the degree of novelty of innovations and on the total number (portfolio) of innovations; and the benefits of patents need to be higher than the costs of owning them. Analyzing the patent propensity of small and large UK firms using a novel

To evaluate the association between mild acute cellular rejection (ACR) and the development of cardiac allograft vasculopathy (CAV) after heart transplantation (HTx). Substudy of the SCHEDULE trial (n = 115), where de novo HTx recipients were randomized to (i) everolimus with early CNI elimination or (ii) CNI-based immunosuppression. Seventy-six patients (66%) were included based on matched intrav

Det här kapitlet fokuserar på relationen mellan arbetsliv och övrigt liv och ett antal digitala strategier som används för att hantera denna. Tidigare forskning har visat att kvinnor i jämförelse med män möter en större utmaning i hanterandet av denna gränsdragning, givet att kvinnor, traditionellt sett, har haft ansvaret för barn samt utfört mer av det obetalda arbetet i hemmet (Hochschild &

Corruption is a salient feature of human condition in any organized society. When risks are low and the returns high, corruption is almost inevitable. Apart from this, traditional public behaviour comes precariously close to what in the Western Weberian sense might amount to corrupt practices.The idea of modern division between the public and private office is alien to traditional culture and corr

Background We designed the EURAMOS-1 trial to investigate whether intensified postoperative chemotherapy for patients whose tumour showed a poor response to preoperative chemotherapy (≥10% viable tumour) improved event-free survival in patients with high-grade osteosarcoma. Methods EURAMOS-1 was an open-label, international, phase 3 randomised, controlled trial. Consenting patients with newly diag

Agroforestry practices support agricultural resilience against climatic variability, increase soil productivity, can diversify and increase farmers' incomes, and support native fauna in agricultural landscapes. However, many farmers are still reluctant to implement agroforestry practices. We distributed questionnaires to 75 agroforestry and 64 "conventional agriculture" small-scale farmers working

Turkiets president Erdoğan vill skapa ett neo-osmanska kalifat, istället för det gamla som upplöstes efter första världskriget. I sina senaste uttalande på Twitter kräver Erdoğan en ny världsordning.