Sökning: "pH stability"
Visar resultat 1 - 5 av 249 avhandlingar innehållade orden pH stability.
1. Toward Realistic Failure Evaluations for Concrete Buttress Dams
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
2. Electronic Structure of π-Conjugated Materials and Their Effect on Organic Photovoltaics
Sammanfattning : The great tunability of structure and electronic properties of π-conjugated organic molecules/polymers combined with other advantages such as light weight and flexibility etc., have made organic-based electronics the focus of an exciting still-growing field of physics and chemistry for more than half a century. LÄS MER
3. Mechanisms and Dynamics of Carbapenem Resistance in Escherichia coli
Sammanfattning : The emergence of extended spectrum β-lactamase (ESBL) producing Enterobacteriaceae worldwide has led to an increased use of carbapenems and may drive the development of carbapenem resistance. Existing mechanisms are mainly due to acquired carbapenemases or the combination of ESBL-production and reduced outer membrane permeability. LÄS MER
4. Improving the understanding of cloud radiative heating
Sammanfattning : Clouds play an essential role in regulating Earth’s radiation budget by reflecting and absorbing energy at different spectra. As they interact with radiation, they can radiatively heat or cool the adjacent atmosphere and the surface. LÄS MER
5. Stability of the free-surface problem arising in ice-sheet- and glacier modeling : Numerical investigation and stabilization
Sammanfattning : This thesis consists of two papers dealing with a stabilization method for free-surface flows. The method was initially developed to stabilize mantle-convection simulations, but is in this work extended to ice-sheet- and glacier modeling. LÄS MER