Search results
Filter
Filetype
Your search for "*" yielded 548979 hits
Krypning hos ABS-plast i apparatlådor
On Finite Analysis of Geometrically Nonlinear Problems
Några vanliga approximationer vid strukturdynamisk analys
Policy and practice in Swedish art and music schools
The connection between policy documents (global and local) and Swedish art and music schools is discussed in this presentation from the perspective of democratic education.
Studieresa Västtyskland 1985
The Smallest Polyoxotungstate Retained by TRIS-Stabilization
A polycondensation reaction of the orthotungstate anion WO42-, buffered at pH 7.5 in a TRIS-HCl (0.15 M) solution, results in the first example of a discrete polyoxotungstate anion, with just two W ions stabilized with TRIS ligands. It was isolated and characterized as Na2[WVI2O6(C4O3NH10)2]·6H2O by single-crystal and powder X-ray diffraction, FT-IR spectroscopy, thermogravimetrical analysis (TGA)
Polyoxometalates as Effective Nano-inhibitors of Amyloid Aggregation of Pro-inflammatory S100A9 Protein Involved in Neurodegenerative Diseases
Pro-inflammatory and amyloidogenic S100A9 protein is central to the amyloid-neuroinflammatory cascade in neurodegenerative diseases. Polyoxometalates (POMs) constitute a diverse group of nanomaterials, which showed potency in amyloid inhibition. Here, we have demonstrated that two selected nanosized niobium POMs, Nb10 and TiNb9, can act as potent inhibitors of S100A9 amyloid assembly. Kinetics ana
Microwave Synthesis of Alkali-Free Hexaniobate, Decaniobate, and Hexatantalate Polyoxometalate Ions
Microwave preparation of polyoxoniobates and -tantalates afford a more rapid alternative to conventional hydrothermal methods of synthesis, in addition to allowing for the use of anhydrous niobium pentoxide in lieu of niobic acid, albeit with diminished yields. Limitations associated with the pH at which different oxides can be activated and how this affects the accessibility of different products
The specific co-ion effect on gelling and surface charging of silica nanoparticles : Speculation or reality?
Based on extensive experimental investigations on many different oxide nanoparticles, it is now a well-established view that the counter-ions exhibit ion specific effects due to their high charge density and strong interaction with oppositively charged surfaces. On the other hand, studies regarding co-ion effects are scarcely reported in the literature. In this study we have measured the surface c
Influence of stream turbulence intensity and eddy size of the fluctuating pressure forces on a single tube
This paper presents a systematic investigation of the influence of streamturbulence on the pressure forces on a single tube. Grids were used to producedifferent turbulent flow fields with longitudinal integral scale (eddy size)ranging from 0.1 to 0.5 tube diameters and turbulence intensities ranging from0.1 to 3-2 %. The measurements were carried out at two Reynolds numbers, 2.7 - 10 and U.1-104 ,
Influence of a low-intensity freestream turbulence on heat transfer and wall pressures for two tubes in an in-line arrangement
Flow around two tubes in an in-line arrangement: flow visualizations and pressure measurements
Numerical simulation of unsteady flow around a square two-dimensional cylinder
Calculations of two-dimensional unsteady flow around a quadratic two-dimensional cylinder at zero angle of attack are performed. The Reynolds numbers are low (Re = 45 - 250) so that the flow presumably is laminar. At Re > 50 a von Karman vortex street with a well-defined shedding frequency is predicted. An incompressible SIMPLEC finite volume code employing non-staggered grid arrangement is used.
A pilot multicentre cluster randomised trial to compare the effect of trauma life support training programmes on patient and provider outcomes
Introduction Trauma accounts for nearly 10% of the global burden of disease. Several trauma life support programmes aim to improve trauma outcomes. There is no evidence from controlled trials to show the effect of these programmes on patient outcomes. We describe the protocol of a pilot study that aims to assess the feasibility of conducting a cluster randomised controlled trial comparing advanced
A dynamic one-equation subgrid model for simulation of flow around a square cylinder
Large Eddy Simulations (LESs) of flow around a square cylinder at Re = 22 × 103 are performed employing a dynamic one-equation subgrid model. An implicit fractional step method finite-volume code with second-order accuracy in space and time is used. By using a periodic boundary condition, the spanwise dimension is four times the side length of the cylinder. Some global quantities, such as the domi
Numerical simulation of flow past a square cylinder
2D and 3D unsteady flow past a rigid prism of a squarecross-section with one side facing the oncoming flow is numerically simulated for Reynolds numbers between 200 to 500. An incompressible code is used employing an implicit fractional step method finite-volume with second-order accuracy in space and time. For 2D flow, it is found that, for Re >300, the time-mean flow patterns are not perfectly s
Flow Around a Rectangular Cylinder of Critical Side Ratio
Flow around Cylinders Joined with a Step in the Diameter
Spacer cation engineering in Ruddlesden-Popper perovskites for efficient red light-emitting diodes with recommendation 2020 color coordinates
Ruddlesden-Popper perovskites (RPPs) have been demonstrated as a very promising approach for tuning the emission color of perovskite light-emitting diodes (PeLEDs). However, achieving high-performance red PeLEDs with recommendation 2020 color coordinates is still challenging due to the lack of reasonable control over the properties of RPP films. Here, we demonstrate that the judicious selection of
