Essays about: "LED light emitting diodes"
Showing result 1 - 5 of 23 essays containing the words LED light emitting diodes.
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1. A Positioning System for Landing a UAV on a UGV in a GNSS-Denied Scenario
University essay from Linköpings universitet/Institutionen för systemteknikAbstract : A system of an unmanned aerial vehicle (UAV) collaborating with an unmanned ground vehicle (UGV) for use in for example surveillance, reconnaissance, transport and target acquisition is studied. The project investigates the problem of estimating the relative position, velocity and orientation between the UAV and the UGV required to autonomously land the UAV on the UGV during movement. READ MORE
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2. Antenna as a sensor for sensing available LTE networks
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : This thesis primarily deals with the concept of designing an antenna based device to harvest energy from Radio Frequency (RF) and using the harvested energy to sense the available Long Term Evolution (LTE) network in order for the Internet of Things (IoT) devices to connect to the network for the purpose of transmitting and receiving data. Secondarily the importance of this project is targeting how to conserve battery power in an IoT device and extend it’s lifetime. READ MORE
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3. Impact of different light sources on the responses of moth
University essay from Högskolan i HalmstadAbstract : In recent decades, the negative effects of artificial light at night on natural ecosystems have attracted the attention of ecologists. Studies have shown that artificial light at night leads to a considerable reduction in insects and has a worrying impact on terrestrial ecosystems, including nocturnal insects (e.g. Lepidoptera) such as moths. READ MORE
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4. Short wavelength UV–LED photoinitiated radical polymerization of acrylate–based coating systems—A comparison with conventional UV curing.
University essay from Uppsala universitet/StrukturkemiAbstract : The present work was performed at Sherwin–Williams Sweden group AB with the objective of comparing short-wavelength light emitting diodes (UVB/UVC) with the conventional mercury arc lamp as a curing method of acrylate-based, UV-paint undergoing free-radical polymerization when exposed to UV-radiation. Due to environmental and health risks, mercury-doped radiation sources will be phased out in the near future, according to the United Nations Minamata convention, hence new alternatives are needed. READ MORE
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5. Compensating the Changing Reactive Power in the Medium-Voltage Grid in Stockholm
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : A decline in inductive reactive power has been noted by several DNOs around Europe for the last decade. Why this is happening is unknown. One of the DNOs is the Swedish DNO Ellevio AB that has seen large decreases in demand of inductive reactive power from their primary substations. READ MORE
