Search for dissertations about: "bias spring"

Showing result 1 - 5 of 9 swedish dissertations containing the words bias spring.

  1. 1. Wafer-level heterogeneous integration of MEMS actuators

    University dissertation from Stockholm : KTH

    Author : Stefan Braun; KTH.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Microelectromechanical systems; MEMS; silicon; wafer-level; integration; heterogeneous integration; transfer integration; packaging; assembly; wafer bonding; adhesive bonding; eutectic bonding; release etching; electrochemical etching; microvalves; microactuator; Shape Memory Alloy; SMA; NITINOL; TiNi; NiTi; cold-state reset; bias spring; stress layers; crossbar switch; routing; switch; switch array; electrostatic actuator; S-shaped actuator; zipper actuator; addressing; transfer stamping; blue tape; TECHNOLOGY Information technology Computer engineering; TEKNIKVETENSKAP Informationsteknik Datorteknik;

    Abstract : This thesis presents methods for the wafer-level integration of shape memory alloy (SMA) and electrostatic actuators to functionalize MEMS devices. The integration methods are based on heterogeneous integration, which is the integration of different materials and technologies. READ MORE

  2. 2. Heterogeneous Integration of Shape Memory Alloysfor High-Performance Microvalves

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Henrik Gradin; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microelectromechanical systems; MEMS; silicon; wafer-level; integration; heterogeneous integration; wafer bonding; Au-Si; eutectic bonding; release etching; electrochemical etching; microvalves; microactuators; shape memory alloy; SMA; NiTinol; TiNi; NiTi; cold-state reset; bias spring; gate valves; wire bonding;

    Abstract : This thesis presents methods for fabricating MicroElectroMechanical System (MEMS) actuators and high-flow gas microvalves using wafer-level integration of Shape Memory Alloys (SMAs) in the form of wires and sheets.The work output per volume of SMA actuators exceeds that of other microactuation mechanisms, such as electrostatic, magnetic and piezoelectric actuation, by more than an order of magnitude, making SMA actuators highly promising for applications requiring high forces and large displacements. READ MORE

  3. 3. Catch and effort from a recreational trolling fishery in a large lake

    University dissertation from Karlstad : Karlstads universitet

    Author : Anders Andersson; Karlstads universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Angler survey; atlantic salmon; brown trout; complemented survey; Lake Vänern; recreational fisheries; fisheries management; recall bias; Biology; Biologi;

    Abstract : Over recent decades recreational fisheries have grown substantially throughout the world. Despite this increase, catches from recreational fisheries have often been ignored in fisheries management, although this is now being remedied. READ MORE

  4. 4. Hydrological Modeling for Climate Change Impact Assessment Transferring Large-Scale Information from Global Climate Models to the Catchment Scale

    University dissertation from Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University

    Author : Claudia Teutschbein; Stockholms universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bias Correction; Climate Change; Climate Models; Ensembles; GCM; HBV; Hydrological Modeling; Precipitation; RCM; Split Sample Test; Streamflow; Sweden; Temperature; Uncertainty; naturgeografi; Physical Geography;

    Abstract : A changing climate can severely perturb regional hydrology and thereby affect human societies and life in general. To assess and simulate such potential hydrological climate change impacts, hydrological models require reliable meteorological variables for current and future climate conditions. READ MORE

  5. 5. Carbon trace gas dynamics in subarctic lakes

    University dissertation from Stockholm : Department of Geological Sciences, Stockholm University

    Author : Joachim Jansen; Stockholms universitet.; [2020]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lakes; methane; carbon dioxide; fluxes; gas transfer; proxy; climate change; geokemi; Geochemistry;

    Abstract : Northern lakes are important sources of greenhouse gases carbon dioxide and methane to the atmosphere. Emissions are expected to increase as the climate continues to warm. Even so, lake carbon budgets are currently poorly constrained. This is in part because of a limited understanding of the processes that govern the flux. READ MORE