Sökning: "Jonas Nordström"

Visar resultat 6 - 10 av 11 avhandlingar innehållade orden Jonas Nordström.

  1. 6. Structure and Dynamics of Silica Dispersions and Gels

    Författare :Jonas Nordström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aging; Photon correlation spectroscopy; sodium silicate; lithium electrolytes; water glass; fumed silica; sol-gel transition;

    Sammanfattning : This thesis deal with the sol-gel transition of two quite different systems, both based on silica. The overall aim is to understand what interactions lead to this sol-gel transition and how the structure and dynamics change as a result of this.The first project concern the gelation of water glass, also known as alkaline sodium silicate solutions. LÄS MER

  3. 7. Toward Realistic Failure Evaluations for Concrete Buttress Dams

    Författare :Jonas Enzell; Anders Ansell; Erik Nordström; Andreas Sjölander; Richard Malm; Leif Lia; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; concrete dams; buttress dams; stability analysis; dam failure behavior; physical model tests; FEM; betongdammar; lamelldammar; stabilitetsanalys; dammbrott; fysiska modellförsök; FEM; Betongbyggnad; Concrete Structures;

    Sammanfattning : Concrete dams, complex structures supporting massive loads, have traditionally been assessed using simplified 2D analytical stability analyses based on the rigid body assumption. Previous studies have shown that 3D behavior, such as the interaction between the monoliths and the valley's geology, can greatly impact the load-bearing capacity of gravity dams but remains largely unexplored in buttress dams. LÄS MER

  4. 8. Essays on Energy Demand and Household Energy Choice

    Författare :Amin Karimu; Runar Brännlund; Jonas Nordström; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Choice Probability; derivatives; energy policy; gasoline demand; propensity score; tax simulation; unobserved trend; nationalekonomi; Economics;

    Sammanfattning : This thesis consists of four self-contained papers related to energydemand and household cooking energy.Paper [I] examine the impact of price, income and non-economicfactors on gasoline demand using a structural time series model. LÄS MER

  5. 9. Essays on Offshoring, Labor Demand and Hypothetical Bias in Choice Experiments

    Författare :Selen Savsin; Patrik Karpaty; Lars Hultkrantz; Linda Andersson; Jonas Nordström; Örebro universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Offshoring; Inshoring; Firm-level Data; Relative Labor Demand; Stated Choice Experiments; Hypothetical Bias; Referencing; Certainty Calibration; Value of Time;

    Sammanfattning : This dissertation consists of four papers on offshoring, labor demand and hypothetical bias in travel-time stated choice experiments. They are summarized as follows. LÄS MER

  7. 10. Chloride transport and reinforcement corrosion in the vicinity of the transition zone between substrate and repair concrete

    Författare :Pål Skoglund; Jonas Holmgren; Erik Nordström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building engineering; Byggnadsteknik;

    Sammanfattning : One of the major degradation problems in concrete structures is chloride initiated reinforcement corrosion resulting in cracked, spalled and delaminated concrete. Thesedamages are repaired for large amounts of money and because of high repair costs it is important to perform durable repairs. LÄS MER