Filtyp
Adaptive time-stepping is central to the efficient solution of initial value problems in ODEs and DAEs. The error committed in the discretization method primarily depends on the time-step size h, which is varied along the solution in order to minimize the computational effort subject to a prescribed accuracy requirement. This paper reviews the recent advances in developing local adaptivity algorit
We report a study on the spatial homogeneity and nitridation of a nanopattern template using a spectroscopic photoemission and low energy electron microscopy. The template was composed of Al nanodots which were patterned into a SiO2/Si(1 1 1) surface using e-beam lithography and reactive ion etching. The template exhibited a global inhomogeneity in terms of the local topography, Al composition and
We formulate multi-input multi-output (MIMO) proportional-integral-derivative (PID) controller design as an optimization problem that involves nonconvex quadratic matrix inequalities. We propose a simple method that replaces the nonconvex matrix inequalities with a linear matrix inequality (LMI) restriction, and iterates to convergence. This method can be interpreted as a matrix extension of the c
The 'European Guidelines on Quality Criteria for Diagnostic Radiographic Images' do not address the choice of film characteristic (H/D) curve, which is an important parameter for the description of a radiographic screen-film system. Since it is not possible to investigate this influence by taking repeated exposures of the same patients on films with systematically varied H/D curves, patient images
This study focuses on the embedding of new biotech solutions into three business landscapes - US, China and Taiwan. A "state-of-the-art" chromatography system tuned for operating in the step between laboratory and large-scale production is used as the common point of departure to investigate the supplier-user interfaces involving biotechnology in each of the three countries; the resource interacti
AIM: The aim of this study was to investigate to what extent individual-based extended information given to mothers from city parts of low education can improve precautions taken by them to prevent burn and scald injuries involving young children in the home and further to compare the results with a group of mothers who had not received extended information. METHODS: This intervention study, with
Photon-echo-relaxation measurements made on the 3H4-3P0 transition of 0.01 at. % Pr3+:YAG (where YAG represents yttrium aluminum garnet), 3H4-1D2 transition in 0.1 at. % Pr3+:YAlO3, and 7F0-5D0 transition in 0.25 at. % Eu3+:YAlO3 show that the photon-echo relaxation rate increases when the intensities of the excitation pulses are increased. Although a part of the relaxation-rate increase in Pr3+:Y
In the present work, a numerical study has been performed to simulate the effect of free-stream turbulence, length scale and variations in rotational speed of the rotor on heat transfer and fluid flow for a transonic high-pressure turbine stage with tip clearance. The stator and rotor rows interact via a mixing plane, which allows the stage to be computed in a steady manner. The focus is on turbin
In southern African Iron Age studies, there are few attempts to systematically apply and include laboratory analyses when studying archaeological ceramic materials. As demonstrated in this paper, such analyses help to understand technological aspects such as raw materials, manufacturing techniques and vessel function. Combined with vessel shape and decoration as well as ethnographic studies the re
Although most institutions offer some kind of follow-up to patients operated on for colorectal cancer, its value with respect to prolonged survival has been challenged. However, improved results of liver surgery and chemotherapy make it reasonable to assume that a follow-up programme leading to detection of more asymptomatic recurrences would result in improved survival. Liver metastases and extra
Using a numerical fitting scheme we construct the exact Density-Functional (DF) effective potential, corresponding wave-functions and orbital eigenvalues from an accurate correlated reference density for the neon atom. Our results compare well with those obtained later using a number of different methods, thus demonstrating the utility of the original and relatively simple fitting scheme. The exac
Abstract in UndeterminedOne sediment core from the Jarnavik bay in Blekinge archipelago has been investigated for its content of pollen and diatoms and its chemical properties. Two levels were also dated by radiocarbon. Based on the results the sediment sequence analysed has been divided into three environmental units largely corresponding to the lithology of the sequence. A lowermost unit consist
By using both mitochondrial and nuclear multiloci markers, we explored population genetic structure, gene flow and sex-specific dispersal of frillneck lizards (Chlamydosaurus kingii) sampled at three locations, separated by 10 to 50 km, in a homogenous savannah woodland in tropical Australia. Apart from a recombinant lizard, the mitochondrial analyses revealed two nonoverlapping haplotypes/populat
We construct small amplitude gravity-capillary water waves with small nonzero vorticity, in three spatial dimensions, bifurcating from uniform flows. The waves are symmetric, and periodic in both horizontal coordinates. The proof is inspired by Lortz' construction of magnetohydrostatic equilibria in reflection-symmetric toroidal domains. It relies on a representation of the vorticity as the cross
This paper discusses the ecological optimisation of municipal waste management systems. The purpose of this paper is to help local decision-makers in designing integrated waste management solutions that are ecologically optimal. The study uses life-cycle assessment (LCA) methodology to build a model and test different waste management scenarios in order to see whether the waste management hierarch
Hur och i vilken omfattning högre lärosäten (universitet och högskolor) i Sverige samverkar med samhället har debatterats i media såväl som i forskningen. Denna artikel belyser den formaliseringsprocess som skett i kölvattnet av nya regleringar och politiska krav på samverkan. I studien analyseras officiella dokument och intervjuer med universitetsanställda vid två svenska lärosäten. Analysen fokuHow and to what extent higher education institutions in Sweden are collaborating with society has been debated in public media and in research. This article highlights the formalisation of the Swedish collaboration policy following a reinforced regulation and political pressures. In the study, official university documents and interviews with university employees at two Swedish universities are an
Apart from microhardness and elastic modulus, the stress-strain relation is another important characteristic that more and more scholars have been trying to extract from nanoindentation. With the development of artificial intelligence and computer technology, a machine learning based method is proposed in this paper to extract stress-strain curve of grey cast iron using sharp nanoindentation. Firs
In this investigation we show that the entropy of the two-dimensional infinite-state Potts model is linear in configurational energy in the thermodynamic limit. This is a direct consequence of the local convexity of the microcanonical entropy, associated with a finite system undergoing a first-order transition. For a sufficiently large number of states q, this convexity spans the entire energy ran
