Search for dissertations about: "span efficiency"

Showing result 1 - 5 of 43 swedish dissertations containing the words span efficiency.

  1. 1. Costs in Swedish Public Transport An analysis of cost drivers and cost efficiency in public transport contracts

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Andreas Vigren; KTH.; Statens väg- och transportforskningsinstitut.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Transportvetenskap; Transport Science; 02 Road: Economics; 02 Road: Economics; Cost; Increase; Efficiency; Contract; Procurement; Public transport;

    Abstract : De senaste sju åren har de totala kostnaderna för att bedriva kollektivtrafik i Sverige ökat med över 30 procent i reala termer enligt siffror från myndigheten Trafikanalys. Jämförs en längre tidsperiod hittas samma mönster. READ MORE

  2. 2. Process modelling based on data from an evaporation and a CTMP process : Analysis of energy efficiency and process variability

    University dissertation from Karlstad : Karlstads universitet

    Author : Daniel Ekbåge; Karlstads universitet.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CTMP; process modelling; evaporation; energy efficiency; Miljö- och energisystem; Environmental and Energy Systems;

    Abstract : The manufacture of pulp and paper is an energy intensive process configured of several unit processes that shape a network of flows of wood chips, chemical pulp, mechanical pulp, paperboard, steam and other important components. Improved energy efficiency supports sustainability of the process and the products. READ MORE

  3. 3. Multidimensional Modulation Formats for Coherent Single- and Multi-Core Fiber-Optical Communication Systems

    University dissertation from Karlstad : Karlstads universitet

    Author : Tobias Eriksson; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; four-dimensional 4D estimates of mutual information MI ; multidimensional modulation formats; lattice based modulation; biorthogonal modulation in eight dimensions; power efficiency; 16-ary quadrature amplitude modulation 16QAM ; quadrature phase shift keying QPSK ; polarization-switched QPSK PS-QPSK ; 128-ary set-partitioning 16QAM 128-SP-16QAM ; spectral efficiency; single parity check-coded modulation; multidimensional position modulation; achievable information rate.; iber-optical communication; multicore fiber transmission; binary pulse position modulation QPSK 2PPM-QPSK ; crosstalk;

    Abstract : This thesis covers multidimensional modulation formats for coherent optical communication systems including spatial division multiplexed systems using multicore fibers. The single-mode optical signal has four dimensions which are spanned by the two orthogonal polarizations and the in-phase and quadrature components. READ MORE

  4. 4. Modular long-span timber structures a systematic framework for buildable construction

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Anders Björnfot; Luleå tekniska universitet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träbyggnad; Timber Structures;

    Abstract : One of the identified reasons for the low amount of timber construction in Sweden is a general lack of knowledge about timber engineering and how timber can be used to its full advantage. One way for increased timber construction is the development of a cost-efficient and easy to comprehend building system. READ MORE

  5. 5. Feathers by day, membranes by night - Aerodynamic performance in bird and bat flight

    University dissertation from Department of Biology, Lund University

    Author : Florian Muijres; Lunds universitet.; Lund University.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; animal flight; aerodynamics; vortex wake; actuator disk; flight performance; span efficiency; bird; bat; wind tunnel; PIV; Pied Flycatcher; Glossophaga soricina; Leptonycteris yerbabuenae;

    Abstract : Popular Abstract in English Animal flight has always intrigued people, and different aspects of animal flight have therefore widely been studied by biologists, physicists and engineers. At least to me, the aspect concerning the aerodynamics of animal flight in particular is very interesting because of the complex temporal varying wake dynamics as a result of continually wing morphing in flapping flight. READ MORE