Essays about: "wave period"

Showing result 1 - 5 of 81 essays containing the words wave period.

  1. 1. Information Operations & The Rising Threat in the Cyber Domain. Case Study of Finnish Governments Addressing the Cyber Threat Environment and Policies Countering Information Operations

    University essay from Göteborgs universitet/Institutionen för journalistik, medier och kommunikation

    Author : Tuuli Marjaana Järvinen; [2021-07-27]
    Keywords : Information operations; information warfare; cyber environment; extended security; policy analysis; hybrid influence;

    Abstract : This research was inspired by two courageous Finnish women, journalist Jessikka Aro and PhD Saara Jantunen, who shined a light on Russian hostile behaviour on the Internet and started discussions about information operations nationally and internationally all over the world. Due to personally becoming a target of aggressive information campaigns, Jessikka Aro had to move abroad from her home as the Finnish Security and Intelligence Service suggested there is nothing to be done to counter the attacks or safeguard her from getting harassed online and "offline". READ MORE

  2. 2. Estimation of satellite orbits using ground based radar concept

    University essay from Umeå universitet/Institutionen för fysik

    Author : Jonas Gabrielsson; [2021]
    Keywords : ;

    Abstract : Today an abundance of objects are circulating in earth captured orbit. Monitoring these objects is of national security interest. One way to map any object in orbit is with their Keplerian elements. A method for estimating the Keplerian elements of a satellite orbit simulating a ground based radar station has been investigated. READ MORE

  3. 3. A Numerical Approach for Wind Tunnel Noise Control

    University essay from KTH/Marcus Wallenberg Laboratoriet MWL

    Author : Hampus Dall; Robert Palm; [2021]
    Keywords : Technical Acoustics; ANC; Active Noise Control; Superposition; Wind Tunnel; Wingsuit; Indoor Wingsuit; Higher Order Modal Acoustic Field Beyond Plane Wave Region; Numerical Acoustic Simulations; Teknisk Akustik; Aktiv Brusreducering; Superposition; Vindtunnel; Flygning med ekorrdräkt inomhus; Högre ordningens akustisk modanalys bortom planvågsteori; Numeriska akustiska simuleringar;

    Abstract : A wind tunnel from the 1950s located in Bromma, Stockholm, once used for military research is today used for commercial activities. Today the tunnel is used for indoor wingsuit flight and the facility has an interest in reducing the overall noise generated by the tunnel. Acoustic measurements indicate noise problems in the 50 Hz range. READ MORE

  4. 4. Primordial Gravitational Waves and ultra-light Dark Matter in a complex singlet extended Standard Model

    University essay from Lunds universitet/Partikelfysik; Lunds universitet/Teoretisk partikelfysik

    Author : Sara Wildenor; [2021]
    Keywords : theoretical physics; gravitational waves; dark matter; complex singlet extended standard model; LISA; BBO; DECIGO; Physics and Astronomy;

    Abstract : In this thesis, the consequences of extending the internal symmetries of the standard model with a complex singlet scalar field, are investigated in terms of dark matter phenomenology and the possibility of primordial gravitational wave detection utilizing space based laser interferometry. The scalar potential of the model is constructed with a Z2 symmetry, which allows for the retainment of a linear and a quadratic coupling parameter, as well as a stable dark matter candidate, and an additional non-zero vacuum expectation value for the real component of the scalar field. READ MORE

  5. 5. Device Resonance Response in a Wave Energy Converter : Investigation of Surge Resonance in a Heaving Point Absorber

    University essay from Uppsala universitet/Elektricitetslära

    Author : Lykke Östbom; [2021]
    Keywords : ;

    Abstract : Wave power possesses vast potential to become a considerable energy contributor. The main challenge for wave power to become competitive on the energy market is to minimize the delivered energy cost simultaneously as designing a wave energy converter (WEC) strong enough to survive extreme sea conditions. READ MORE