Sökning: "Artiklar"

Visar resultat 1 - 5 av 615 avhandlingar innehållade ordet Artiklar.

  1. 1. Femtosecond Investigations of Spiropyran Photochromism in Solution

    Författare :1974- Ann-Kathrin Holm; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : .... LÄS MER

  3. 2. Securing Information Assets : Understanding, Measuring and Protecting against Social Engineering Attacks

    Författare :Marcus Nohlberg; Benkt Wangler; Stewart Kowalski; Angela Sasse; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer and systems science; Data- och systemvetenskap; Computer and Systems Sciences; data- och systemvetenskap; Teknik;

    Sammanfattning : Social engineering denotes, within the realm of security, a type of attack against the human element during which the assailant induces the victim to release information or perform actions they should not. Our research on social engineering is divided into three areas: understanding, measuring and protecting. LÄS MER

  4. 3. Towards understanding the fatigue behaviour of Alloy 718 manufactured by Powder Bed Fusion processes

    Författare :Arun Ramanathan Balachandramurthi; Per Nylén; Robert Pederson; Johan Moverare; Filippo Berto; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue; Additive Manufacturing; Powder Bed Fusion; Superalloy; Microstructure; Surface Roughness; Production Technology; Produktionsteknik;

    Sammanfattning : Additive Manufacturing (AM) is a disruptive modern manufacturing process in which parts are manufactured in a layer-wise fashion. Among the metal AM processes, Powder Bed Fusion (PBF) technology — comprised of Electron Beam Powder Bed Fusion (EB-PBF) and Laser Beam Powder Bed Fusion (LB-PBF) —has opened up a design space that was formerly unavailable with conventionalmanufacturing processes. LÄS MER

  5. 4. Novel beam shaping and computer vision methods for laser beam welding

    Författare :Yongcui Mi; Antonio Ancona; Fredrik Sikström; Isabelle Choquet; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser beam welding; Beam shaping; Deformable mirror; Process monitoring; Process control; Model validation; Computer vision; Machine learning; Butt joint; T-joint.; Lasersvetsning; Beam shaping; Deformerbar spegel; Processövervakning; Processkontroll; Modellvalidering; Datorsyn; Maskininlärning; Butt joint; T-fogar;

    Sammanfattning : Laser beam welding has been widely applied in different industrial sectors due to its unique advantages. However, there are still challenges, such as beam positioning in T-joint welding, and gap bridging in butt joint welding,especially in the case of varying gap width along a joint. LÄS MER

  7. 5. Investigation of Melt Pool Thermo-hydrodynamic Behaviour inLaser Beam Welding ofTi-6Al-4V through Numerical Simulation

    Författare :Seyyed Mohammad Ali Noori Rahim Abadi; Isabelle Choquet; Fredrik Sikström; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser beam welding; Beam shaping; Absorptivity; Conductionmode welding; Free surface deformation; Computational Fluid Dynamics; OpenFOAM.; Strålformning; Absorptivitet; Värmeledningssvetsning; Ytdeformation; Computational Fluid Dynamics; OpenFOAM.; Production Technology; Produktionsteknik;

    Sammanfattning : Laser is an efficient and widely used heat source in metal processing suchas welding and additive manufacturing. It has some great advantages compared to the other conventional heat sources like electron beam and arc namely: ability of handling complicated joint geometries and producing large components. LÄS MER