Sökning: "Stille"
Visar resultat 6 - 10 av 39 avhandlingar innehållade ordet Stille.
6. Colour patterns in warning displays
Sammanfattning : In aposematism a prey species use bright colours, often combined with a black contrasting pattern, to signal unprofitability as prey to potential predators. Although there are several different hypotheses about the presence of these internally contrasting patterns, there is little experimental evidence of any beneficial effects. LÄS MER
7. Block stability analysis using deterministic and probabilistic methods
Sammanfattning : This thesis presents a discussion of design tools for analysing block stability around a tunnel. First, it was determined that joint length and field stress have a significant influence on estimating block stability. LÄS MER
8. Model uncertainty of design tools to analyze block stability
Sammanfattning : Block failure is one of the most common failure modes in tunnels. Design tools have some simplifications and, therefore, they also have some model uncertainties. The purpose of this licentiate thesis is to assess the model uncertainty for different design tools in order to estimate block stability. LÄS MER
9. Bleeding and Filtration of Cement-Based Grout
Sammanfattning : Grouting is a common method of sealing rock around tunnels to reduce or stop water inflow. Successful grouting significantly minimizes the maintenance cost and safety of the tunnel. Some questions about bleeding and penetrability of the grouts have to be examined more closely to carry out a successful grouting. LÄS MER
10. Separations- och filtreringsstabilitet hos cementbaserat injekteringsbruk
Sammanfattning : Bleeding of cement based grout Bleeding of cement based grout is a complex problem. How it occurs and which basic mechanism causes and influences bleeding have been questions for discussion. Therefore the aim of the thesis is to illustrate what really happens with grout during bleeding and which factors influence it. LÄS MER