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Way-finding lighting systems for rail tunnel evacuation: A virtual reality experiment with Oculus Rift

An experimental study has been conducted to investigate if a new and simple system, that is, stripes of high-bright dynamic green LED lights installed on the floor, can support people way-finding in smoke-filled railway tunnel evacuations. The impact of way-finding installations on people evacuation (intended as people movement paths and evacuation times) has been studied using Oculus Rift, a head

Häktning får inte användas som ett universalmedel

Under senare tid har det från olika håll påtalats att det finns allvarliga brister i det svenska häktningssystemet. Debatten har varit livlig och främst gällt det faktum att vi i svensk rätt inte har någon bortre gräns för hur lång tid en misstänkt kan vara häktad. Det har också hävdats att restriktionerna i samband med häktning ofta är alltför hårda och att de tillämpas på ett slentrianmässigt sä

Time-Domain Precoding for LTE-over-Copper Systems

Crosstalk cancellation is a crucial issue for traditional digital subscriber line systems. For LTE-over-copper systems, however, the need for crosstalk cancellation varies depending on the analog fronthauling architecture and its parameters. A crosstalk handler that is decoupled as much as possible from the rest of the system architecture is thus preferred. Therefore, we propose a time-domain prec

Machinability of CuZn21Si3P brass

New brass alloys containing less or even no lead are being developed, decreasing the environmental impact of the material. One example of an alternative brass is CuZn21Si3P, which contains less than 0.09 wt-% Pb. The research presented in this article evaluates the machinability of CuZn21Si3P as compared to more common, lead-containing free-machining brasses. The results show a marked decrease in