Sökning: "teknisk kommunikation"

Visar resultat 16 - 20 av 34 avhandlingar innehållade orden teknisk kommunikation.

  1. 16. Optimal Transmit Strategies for Multi-antenna Systems with Joint Sum and Per-antenna Power Constraints

    Författare :Le Phuong Cao; Tobias Oechtering; Skoglund Mikael; Martin Schubert; KTH; []
    Nyckelord :Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Nowadays, wireless communications have become an essential part of our daily life. During the last decade, both the number of users and their demands for wireless data have tremendously increased. Multi-antenna communication is a promising solution to meet this ever-growing traffic demands. LÄS MER

  3. 17. Wirelessly Powered Communications: From Signal Optimization to Antenna Design

    Författare :Boules Atef Nessim Mouris; Ragnar Thobaben; Aggelos Bletsas; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless power transfer; multi-tone signals; non-linear energy harvester; wirelessly powered sensors; joint source-channel coding; analog mappings; energy scheduling; mutual coupling reduction; electromagnetic bandgap; glide symmetry.; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Future internet-of-things (IoT) and beyond 5G communication systems are envisioned to offer large-scale wireless connectivity where the different components of life, society and industry are connected in a smart yet sustainable way. The need for continuous battery charging and/or replacement is a bottleneck for sustainability in these systems. LÄS MER

  4. 18. Lab work in science education : Instruction, inscription, and the practical achievement of understanding

    Författare :Oskar Lindwall; Berner Lindström; Tim Koschmann; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Lab work; science education; educational technology; classroom interaction; ethnomethodology; naturvetenskapliga laborationer; IT i utbildning; klassrumsstudier; etnometodologi; Education; Pedagogik;

    Sammanfattning : Taking an analytical perspective founded on ethnomethodology and conversation analysis, the four studies presented in this thesis provide detailed analyses of video recorded lab work in mechanics at secondary and university level. The investigated activities all build on educational design afforded by a technology called probeware. LÄS MER

  5. 19. Vilja, våga, kunna använda informations- och kommunikationstekniken : människor med funktionshinder i samarbete med universitet och handikapprörelse

    Författare :Åsa Gardelli; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Engineering Psychology; Teknisk psykologi; Pedagogik; Education;

    Sammanfattning : Informations- och kommunikationstekniken har för många människor blivit en naturlig och viktig del i deras dagliga liv. Den öppnar för stora möjligheter men kan också innebära stora omställningar för människor. En återkommande fråga i den allmänna debatten är om alla människor i samhället kommer att kunna ta del av denna teknik. LÄS MER

  7. 20. Aspects of adaptive mesh refinement in the spectral element method

    Författare :Nicolas Offermans; Philipp Schlatter; Ananias Tomboulides; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Error estimators; mesh refinement; adaptivity; spectral element method; algebraic multigrid method; NACA4412; periodic hill case.; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning : This thesis deals with the improvement of the efficiency of numerical simulations in computational fluid dynamics. Some of the limitations of current algorithms on future exascale supercomputers are addressed with the main goal of using adaptive mesh refinement for the simulation of turbulent and three-dimensional flows. LÄS MER