Essays about: "reflectors"

Showing result 1 - 5 of 26 essays containing the word reflectors.

  1. 1. Making nets more acoustically visible : Floats as passive mitigation measures to reduce bycatch of harbour porpoise (Phocoena phocoena) in gillnets

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Frida Rosshagen; [2023]
    Keywords : toothed whales; harbour porpoise; Phocoena phocoena; incidental capture; bycatch; fisheries; fishing gear; ; gillnet; mitigation; reduction; low-cost; passive acoustic reflector; float;

    Abstract : Incidental capture in fishing gear is today affecting at least 112 marine mammal species worldwide and for many smaller toothed whale species (Odontocete), gillnets are considered to be the largest problem. Although some effective mitigation measures exists, these are often context specific and many might be hard to implement due to reasons such as high costs and maintenance. READ MORE

  3. 2. Variable acoustics in multi-functional stadiums

    University essay from KTH/Teknisk akustik

    Author : Felix Vernersson; [2022]
    Keywords : Variable acoustics; Reflections; Gain; Reverberation; Clarity; Frequency masking; Perception of reflected sounds; Variabel akustik; Reflektioner; Rumsförstärkning; Efterklang; Klarhet; Frekvensmaskering; Uppfattning av reflekterade ljud;

    Abstract : This paper handles the background theory, methods and results of the master thesis project titled "Variable acoustics in multi-functional stadiums". \\ The purpose of the project was to investigate whether variable room acoustics could be applicable to large multi-functional stadiums to improve their ability to adapt the soundscape in the stadium for different types of events. READ MORE

  4. 3. Low-profile fully-metallic Luneburg lens antenna

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Justine Djounidi; [2022]
    Keywords : Beam Scanning; Luneburg Lens Antenna; Fully-metallic; Millimeter Wave; Vinkelskanning; Luneburg Linsantenn; Fullt Metalliskt; Millimetervåg;

    Abstract : Modern communication systems face new technological challenges, such as the narrowness and overload of the conventional frequency bands employed for these applications. Nowadays, communication systems are expected to operate at higher frequencies, such as the mm-wave band. READ MORE

  5. 4. Pearls as bycatch mitigation strategy for Harbour porpoise (Phoecena phoecena)

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Sara Gustafsson; [2020]
    Keywords : harbour porpoise; bycatch mitigation; acoustic reflector; pearl; gillnet; F-POD; click rate; click behaviour; inter-click-interval; terminal buzz; diel phase; GAM;

    Abstract : One of the major threats to harbour porpoise population sustainability is thought to be the high incidence of bycatch specifically in gillnets. This study aims to examine the use of acrylic class pearls developed in an earlier study as acoustic reflectors on gillnets in an effort to increase their visibility to echolocating harbour porpoises in the lumpsucker fishery in Kattegatt. READ MORE

  6. 5. Identifiable Radar Reflectors For Automotive Pedestrian Safety

    University essay from Högskolan i Halmstad/Akademin för informationsteknologi

    Author : Abhilash Nagesh Kashyap; Ashwin Madanmohan; [2020]
    Keywords : Radar Reflectors; Identification; Detection; Radar Module; Pedestrian Safety; Corner Reflectors;

    Abstract : Radar plays a major role in safety-critical applications mainly in the automotive industry due to its weather and lighting independence. The progress made in radar hardware technology has made it possible to detect objects more efficiently. READ MORE