Sökning: "bottom substrate"

Visar resultat 1 - 5 av 38 uppsatser innehållade orden bottom substrate.

  1. 1. Utvärdering av biotopvårdande åtgärder i Grimåsbäcken. En analys av fysikaliska egenskaper och sammansättning av makroevertebrater.

    Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Författare :Björn Andermo; [2024-01-22]
    Nyckelord :Channelized streams; retention; biotope preservation; macroinvertebrates; bottom substrate; woody debris.;

    Sammanfattning : Many streams have been exposed to extensive anthropogenic impact for the benefit of forestry and agriculture. The effects has mainly been channelization characterized by lowered and straightened channels. This homogeneous morphology leads to decreased ability to retain water as well as lost connection to the floodplain. LÄS MER

  3. 2. Påverkan av tillgång till skydd och ljusförhållande på strandningsrisk hos öringyngel (Salmo trutta)

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Mikael Nilsson Saldías; [2023]
    Nyckelord :Hydropower; hydropeaking; shelter; light condition; brown trout; fry; Salmo trutta; Vattenkraft; korttidsreglering; skydd; ljusförhållande; öring; yngel; Salmo trutta;

    Sammanfattning : Vissa vattenkraftverk drivs med korttidsreglering som möjliggör snabb anpassning av elproduktion, vilket sker genom hastiga förändringar i vattenflöde. Flera olika typer av organismer påverkas negativt av korttidsreglering, till exempel fiskar. LÄS MER

  4. 3. Synchronized assessment ofcompression of corrugatedboard : Mechanics and visualization

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanik

    Författare :Johan Bürger; [2023]
    Nyckelord :corrugated board; compression; image analysis; thresholding; modelling; Maxwell; spring dashpot;

    Sammanfattning : Flexographic printing involves driving a paper substrate through the gap between two cylinders, where one of the cylinders has a print form layer covered in ink. The ink transfer from the print form to the paper is dependent on the pressure between the paper substrate and the cylinders. LÄS MER

  5. 4. BCP Lithography Defined Arrays of InAs NWs Grown Using MOVPE with Au Seeds

    Master-uppsats, Lunds universitet/Lunds Tekniska Högskola; Lunds universitet/Fasta tillståndets fysik

    Författare :Björn Landeke-Wilsmark; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In this report we outline a detailed process flow for a quick and inexpensive implementation of large dense arrays of InAs nanowires (NWs) grown in the reactive ion etching/etched (RIE) pores of a SiO2/SiNx mask on top of an InAs/Si(111) substrate. The self-assembled (hexagonally close-packed) pattern of poly(methyl-methacrylate) (PMMA) cylinders in a poly(styrene) (PS) matrix adopted by a linear diblock poly(styrene-block-methyl-methacrylate) P(S-b-MMA) block-copolymer (BCP) was transferred to the dielectric stack (consisting of a ≈10 nm plasma enhanced chemical vapour deposition/deposited (PECVD) SiNX layer topped by a thin atomic layer deposition/deposited (ALD) SiO2 film) using a two-step RIE procedure. LÄS MER

  7. 5. Investigation of Methods to Improve PZT Sol-Gel Deposition Process for Energy Harvesting Applications

    M1-uppsats, KTH/Hälsoinformatik och logistik

    Författare :Mikael Granberg; [2022]
    Nyckelord :PZT; sol-gel; self-polarization; seed layer; titanium oxidation; PZT; sol-gel; självpolarisering; seedlager; titanoxidering;

    Sammanfattning : The purpose of this work was to investigate ways to modify Silex sol-gel deposition of PZT (PbZrxTi(1-x)O3, Lead Zirconate Titanate) in order to improve its properties for energy harvesting applications. A number of methods to improve the figure of merit for energy harvesting (FOM= e312/ε), cause self-polarization, increase lifetime, reduce cost, increase throughput or simplify processing were tested. LÄS MER