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Bo i Ro : Texter från ett tvärvetenskapligt symposium om boende, buller och hälsa. Läkaresällskapets hus i Stockholm, den 20 oktober 2016

Sveriges Regering fattade den 9 april 2015 beslut om en ny förordning medbestämmelser om riktvärden för buller utomhus för spårtrafik, vägar ochflygplatser vid bostadsbyggnader. Förordningen (2015:216) om trafikbullervid bostadsbyggnader träder i kraft den 1 juni 2015. I denna förordning finnsförändrade riktvärden för bullerexponering vid bostader som tillåter betydligtmer buller än tidigare, någo

Palladium seeded GaAs nanowires

In this work, we present a detailed investigation of the growth of palladium-seeded GaAs nanowires. Nanowires grown on GaAs (111)B substrates consist of three different morphologies, denoted as curly (containing multiple kinks), inclined (relative to the substrate, such as 〈001〉), and vertical. We show that the relative yield of the different types is controllable by a combination of V/III ratio a

Near and Intermediate Field Evolution of A Negatively Buoyant Jet

In this study, a mathematical model was developed to simulate the jet and plume behavior in order to determine the optimum discharge conditions for different scenarios. The model was divided into two sub-models, describing respectively the near and intermediate field properties of the discharge for different inclinations and bottom slope. The lateral spreading and electrical conductivity was also

Rotating swings - a theme with variation

Rotating swing rides can be found in many amusement parks, in many different versions. The 'wave swinger' ride, which introduces a wave motion by tilting the roof, is among the classical amusement rides that are found in many different parks, in different sizes, from a number of different makes and names, and varying thematization. The 'StarFlyer' is a more recent version, adding the thrill of lif

Liquid in accelerated motion

What happens to a liquid in a swing or a loop? Accelerated motions leadto effects that may seem surprising. Consider a liquid in a glass placed ona wooden triangle, in turn attached to a string and moving fast in circle a vertical plane. The surface of the water remains parallel to the bottom of the glass—and orthogonal to the string—as long as gravity and the tension in the string are the only fo