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We must recognize that plastics likely constitute a pervasive background in many environments. Beyond their previously documented risks to ecosystems and human health, plastics may also exert unintended influences on laboratory experiments, potentially distorting experimental outcomes. Here, we demonstrate that ultrasound treatment of commonly used laboratory test tubes releases nanoplastics into
The royal Danish-Norwegian flagship Gribshunden, launched in 1485, was amongthe earliest northern European warships purpose-built to carry artillery. However, King Hans employed his vessel as far more than a weapons platform. The ship was his ‘floating castle’, fulfilling all the various purposes of a land redoubt. At its loss in 1495 enroute to a political summit in Kalmar, where Hans expected to
This paper will continue on the topics presented in previous numbers of Ancient Planet (2012/2; 2012/3) by giving an updated account of the ongoing survey work at Gebel el Silsila in Egypt. However, while previous articles have concerned Graeco-Roman quarry marks and their various meanings, the aim here is to draw attention to the site’s Prehistoric Periods with especial focus on the pictorial rep
To increase indoor coverage for mobile services, we propose a residential small cell infrastructure making use of the existing copper plant. The system is cabinet-based, collocated with VDSL2 and uses small pieces of spectrum next to VDSL2. Inspired by the Ericsson Radio Dot System, it challenges the femtocell paradigm offering full macro functionality in the small cells. An interesting service po
In the Grödinge project pottery was recovered from the five Neolithic sites, totaling c. 280 kg. A selected sample of pottery from four of these sites, i.e. the Eklundshov, Smällan, Kyrktorp and Kvedesta sites, has been studied more closely and also analysed technologically.
Strain has frequently been suggested to play an important role in the function of several proteins. In this paper, we review various definition of strain and discuss how it may be quantified. We show that covalent strain (i.e. strain caused by covalent interactions) plays a minor role for the function of all proteins we have studied, e.g. blue copper proteins, desulforedoxin, CuA in cytochrome c o
We introduce a comprehensive framework for the efficient implementation of finite deformation gradient-regularised damage formulations in existing finite element codes. The numerical implementation is established within a thermo-mechanically fully coupled finite element formulation, where the heat equation solution capabilities are utilised for the damage regularisation. The variationally consiste
We use a variational approach to find the best constants for certain Gagliardo-Nirenberg inequalities on the real line. To show the existence of a minimizer, we use the method of concentration-compactness.
To improve cement penetration into the cancellous bone of the acetabulum in hip arthroplasty, sequential cementation of each anchoring hole may be feasible. Since this procedure creates laminations in the cement, we have determined the conditions under which such laminations affect the strength of the cement. Cement bars made at 2, 3 or 4 minutes after the start of cement mixing and with either dr
The local well-posedness of a generalized Camassa-Holm equation is established by means of Kato's theory for quasilinear evolution equations and two types of results for the blow-up of solutions with smooth initial data are given.
We show that the blockage in transmission of a screen with a periodic microstructure integrated over all wavelengths is bounded by the static polarizability per unit area of the screen. Physical bounds on the co-polarized transmission coefficient over a wavelength interval are presented using only information from the zero-frequency properties of the microstructure. The theoretical results are com
