Search for dissertations about: "characteristic"

Showing result 1 - 5 of 1530 swedish dissertations containing the word characteristic.

  1. 1. Systematic Antenna Design Using the Theory of Characteristic Modes

    Author : Zachary Miers; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Theory of Characteristic Modes; Antenna Design; Antenna; Characteristic Modes; Computational Electromagnetics; MIMO Systems; MIMO Antenna; MIMO; Mutual Coupling; Mobile Antenna;

    Abstract : The day Faraday moved a magnet in and out of a wire loop and detected the time-varying magnetic field, the first wireless transmitter / receiver system was created and the world was changed forever. However, it took almost fifty years for Heinrich Hertz to use Maxwell's equations and Faraday's insights in his professorship at Karlsruhe to create the first electromagnetic wireless communication system using a spark gap dipole transmitter and a loop antenna-based receiver. READ MORE

  2. 2. Energy performance of multifamily buildings : building characteristic and user influence

    Author : Jan-Ulric Sjögren; Thomas Olofsson; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy performance; total heat loss coefficient; gain factor; benchmarking; parameter influence; multivariate method; Building engineering; Byggnadsteknik;

    Abstract : Today many professional property holders use different types of software for monthly energy analyses. The data is however often limited to energy and water use, that is paid for by the property holder. In year 2001, financed by the Swedish Energy Agency, the first steps were taken to create a national web based data base, eNyckeln. READ MORE

  3. 3. Do lighting control and user interface design matter to occupant behaviour? The case of optimal lighting use in non-residential buildings

    Author : Pimkamol Mattsson; Institutionen för arkitektur och byggd miljö; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; characteristic; design; energy reduction; energy-saving behaviour; lighting control; light switch; lighting use; non-residential building; perception; user interface;

    Abstract : The lowering of energy use from artificial lighting in buildings is vital to reaching the goal of reducing CO2 emissions. Hence, changes in individuals’ behaviours regarding lighting use have received increased attention. Feedback on energy use has often been used to change individuals’ behaviour. READ MORE

  4. 4. Classification of plethories in characteristic zero

    Author : Magnus Carlson; Tilman Bauer; Lars Hesselholt; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plethories; Witt vectors; ring schemes; Mathematics; Matematik;

    Abstract : We classify plethories over fields of characteristic zero, thus answering a question of Borger-Wieland and Bergman-Hausknecht. All plethories over characteristic zero fields are linear, in the sense that they are free plethories on a bialgebra. READ MORE

  5. 5. Causal Combinatorics : Edges of the Characteristic Imset Polytopes

    Author : Petter Restadh; Svante Linusson; Liam Solus; James Cussens; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Abstract : Explaining data in a concise and efficient manner has become increasingly important in today's society. This thesis pertains to the problem of finding causal links within data, and how that can be done from a mathematical perspective. Using the framework of graphical models has several advantages, from interpretability to efficiency. READ MORE